зеркало из https://github.com/mozilla/pjs.git
7573 строки
273 KiB
C++
7573 строки
273 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Robert O'Callahan <robert@ocallahan.org>
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* Roger B. Sidje <rbs@maths.uq.edu.au>
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* Pierre Phaneuf <pp@ludusdesign.com>
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* Prabhat Hegde <prabhat.hegde@sun.com>
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* Tomi Leppikangas <tomi.leppikangas@oulu.fi>
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* Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
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* Daniel Glazman <glazman@netscape.com>
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* Neil Deakin <neil@mozdevgroup.com>
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* Masayuki Nakano <masayuki@d-toybox.com>
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* Mats Palmgren <matspal@gmail.com>
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* Uri Bernstein <uriber@gmail.com>
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* Stephen Blackheath <entangled.mooched.stephen@blacksapphire.com>
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* Michael Ventnor <m.ventnor@gmail.com>
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* Ehsan Akhgari <ehsan.akhgari@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* rendering object for textual content of elements */
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#include "nsCOMPtr.h"
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#include "nsHTMLParts.h"
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#include "nsCRT.h"
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#include "nsSplittableFrame.h"
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#include "nsLineLayout.h"
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#include "nsString.h"
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#include "nsUnicharUtils.h"
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#include "nsPresContext.h"
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#include "nsIContent.h"
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#include "nsStyleConsts.h"
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#include "nsStyleContext.h"
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#include "nsCoord.h"
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#include "nsRenderingContext.h"
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#include "nsIPresShell.h"
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#include "nsITimer.h"
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#include "nsTArray.h"
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#include "nsIDOMText.h"
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#include "nsIDocument.h"
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#include "nsCSSPseudoElements.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsCompatibility.h"
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#include "nsCSSColorUtils.h"
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#include "nsLayoutUtils.h"
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#include "nsDisplayList.h"
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#include "nsFrame.h"
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#include "nsPlaceholderFrame.h"
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#include "nsTextFrameUtils.h"
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#include "nsTextRunTransformations.h"
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#include "nsFrameManager.h"
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#include "nsTextFrameTextRunCache.h"
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#include "nsExpirationTracker.h"
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#include "nsTextFrame.h"
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#include "nsIUGenCategory.h"
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#include "nsUnicharUtilCIID.h"
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#include "nsTextFragment.h"
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#include "nsGkAtoms.h"
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#include "nsFrameSelection.h"
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#include "nsISelection.h"
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#include "nsIDOMRange.h"
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#include "nsILookAndFeel.h"
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#include "nsCSSRendering.h"
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#include "nsContentUtils.h"
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#include "nsLineBreaker.h"
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#include "nsIWordBreaker.h"
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#include "nsGenericDOMDataNode.h"
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#include "nsILineIterator.h"
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#include "nsIServiceManager.h"
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#ifdef ACCESSIBILITY
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#include "nsAccessibilityService.h"
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#endif
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#include "nsAutoPtr.h"
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#include "nsBidiPresUtils.h"
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#include "nsBidiUtils.h"
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#include "gfxFont.h"
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#include "gfxContext.h"
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#include "gfxTextRunWordCache.h"
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#include "gfxImageSurface.h"
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#include "mozilla/dom/Element.h"
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#ifdef NS_DEBUG
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#undef NOISY_BLINK
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#undef NOISY_REFLOW
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#undef NOISY_TRIM
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#else
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#undef NOISY_BLINK
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#undef NOISY_REFLOW
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#undef NOISY_TRIM
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#endif
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using namespace mozilla;
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using namespace mozilla::dom;
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struct TabWidth {
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TabWidth(PRUint32 aOffset, PRUint32 aWidth)
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: mOffset(aOffset), mWidth(aWidth)
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{ }
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PRUint32 mOffset; // character offset within the text covered by the
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// PropertyProvider
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float mWidth; // extra space to be added at this position (in app units)
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};
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struct TabWidthStore {
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TabWidthStore()
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: mLimit(0)
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{ }
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// Apply tab widths to the aSpacing array, which corresponds to characters
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// beginning at aOffset and has length aLength. (Width records outside this
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// range will be ignored.)
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void ApplySpacing(gfxTextRun::PropertyProvider::Spacing *aSpacing,
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PRUint32 aOffset, PRUint32 aLength);
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PRUint32 mLimit; // offset up to which tabs have been measured;
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// positions beyond this have not been calculated
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// yet but may be appended if needed later
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nsTArray<TabWidth> mWidths; // (offset,width) records for each tab character
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};
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void
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TabWidthStore::ApplySpacing(gfxTextRun::PropertyProvider::Spacing *aSpacing,
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PRUint32 aOffset, PRUint32 aLength)
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{
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// We could binary-search for the first record that falls within the range,
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// but as the number of tabs is normally small and we usually process them
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// sequentially from the beginning of the line, it doesn't seem worth doing
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// at this point.
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for (PRUint32 i = 0; i < mWidths.Length(); ++i) {
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TabWidth& tw = mWidths[i];
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if (tw.mOffset < aOffset) {
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continue;
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}
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if (tw.mOffset - aOffset >= aLength) {
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break;
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}
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aSpacing[tw.mOffset - aOffset].mAfter += tw.mWidth;
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}
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}
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static void DestroyTabWidth(void* aPropertyValue)
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{
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delete static_cast<TabWidthStore*>(aPropertyValue);
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}
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NS_DECLARE_FRAME_PROPERTY(TabWidthProperty, DestroyTabWidth)
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NS_DECLARE_FRAME_PROPERTY(OffsetToFrameProperty, nsnull)
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// The following flags are set during reflow
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// This bit is set on the first frame in a continuation indicating
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// that it was chopped short because of :first-letter style.
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#define TEXT_FIRST_LETTER NS_FRAME_STATE_BIT(20)
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// This bit is set on frames that are logically adjacent to the start of the
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// line (i.e. no prior frame on line with actual displayed in-flow content).
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#define TEXT_START_OF_LINE NS_FRAME_STATE_BIT(21)
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// This bit is set on frames that are logically adjacent to the end of the
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// line (i.e. no following on line with actual displayed in-flow content).
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#define TEXT_END_OF_LINE NS_FRAME_STATE_BIT(22)
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// This bit is set on frames that end with a hyphenated break.
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#define TEXT_HYPHEN_BREAK NS_FRAME_STATE_BIT(23)
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// This bit is set on frames that trimmed trailing whitespace characters when
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// calculating their width during reflow.
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#define TEXT_TRIMMED_TRAILING_WHITESPACE NS_FRAME_STATE_BIT(24)
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// This bit is set on frames that have justification enabled. We record
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// this in a state bit because we don't always have the containing block
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// easily available to check text-align on.
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#define TEXT_JUSTIFICATION_ENABLED NS_FRAME_STATE_BIT(25)
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// Set this bit if the textframe has overflow area for IME/spellcheck underline.
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#define TEXT_SELECTION_UNDERLINE_OVERFLOWED NS_FRAME_STATE_BIT(26)
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#define TEXT_REFLOW_FLAGS \
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(TEXT_FIRST_LETTER|TEXT_START_OF_LINE|TEXT_END_OF_LINE|TEXT_HYPHEN_BREAK| \
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TEXT_TRIMMED_TRAILING_WHITESPACE|TEXT_JUSTIFICATION_ENABLED| \
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TEXT_HAS_NONCOLLAPSED_CHARACTERS|TEXT_SELECTION_UNDERLINE_OVERFLOWED)
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// Cache bits for IsEmpty().
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// Set this bit if the textframe is known to be only collapsible whitespace.
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#define TEXT_IS_ONLY_WHITESPACE NS_FRAME_STATE_BIT(27)
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// Set this bit if the textframe is known to be not only collapsible whitespace.
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#define TEXT_ISNOT_ONLY_WHITESPACE NS_FRAME_STATE_BIT(28)
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#define TEXT_WHITESPACE_FLAGS (TEXT_IS_ONLY_WHITESPACE | \
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TEXT_ISNOT_ONLY_WHITESPACE)
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// This bit is set while the frame is registered as a blinking frame.
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#define TEXT_BLINK_ON NS_FRAME_STATE_BIT(29)
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// Set when this text frame is mentioned in the userdata for a textrun
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#define TEXT_IN_TEXTRUN_USER_DATA NS_FRAME_STATE_BIT(30)
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// nsTextFrame.h has
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// #define TEXT_HAS_NONCOLLAPSED_CHARACTERS NS_FRAME_STATE_BIT(31)
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// Whether this frame is cached in the Offset Frame Cache (OffsetToFrameProperty)
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#define TEXT_IN_OFFSET_CACHE NS_FRAME_STATE_BIT(63)
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/*
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* Some general notes
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*
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* Text frames delegate work to gfxTextRun objects. The gfxTextRun object
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* transforms text to positioned glyphs. It can report the geometry of the
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* glyphs and paint them. Text frames configure gfxTextRuns by providing text,
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* spacing, language, and other information.
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*
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* A gfxTextRun can cover more than one DOM text node. This is necessary to
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* get kerning, ligatures and shaping for text that spans multiple text nodes
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* but is all the same font. The userdata for a gfxTextRun object is a
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* TextRunUserData* or an nsIFrame*.
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*
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* We go to considerable effort to make sure things work even if in-flow
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* siblings have different style contexts (i.e., first-letter and first-line).
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*
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* Our convention is that unsigned integer character offsets are offsets into
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* the transformed string. Signed integer character offsets are offsets into
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* the DOM string.
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*
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* XXX currently we don't handle hyphenated breaks between text frames where the
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* hyphen occurs at the end of the first text frame, e.g.
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* <b>Kit­</b>ty
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*/
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/**
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* We use an array of these objects to record which text frames
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* are associated with the textrun. mStartFrame is the start of a list of
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* text frames. Some sequence of its continuations are covered by the textrun.
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* A content textnode can have at most one TextRunMappedFlow associated with it
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* for a given textrun.
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*
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* mDOMOffsetToBeforeTransformOffset is added to DOM offsets for those frames to obtain
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* the offset into the before-transformation text of the textrun. It can be
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* positive (when a text node starts in the middle of a text run) or
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* negative (when a text run starts in the middle of a text node). Of course
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* it can also be zero.
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*/
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struct TextRunMappedFlow {
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nsTextFrame* mStartFrame;
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PRInt32 mDOMOffsetToBeforeTransformOffset;
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// The text mapped starts at mStartFrame->GetContentOffset() and is this long
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PRUint32 mContentLength;
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};
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/**
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* This is our user data for the textrun, when textRun->GetFlags() does not
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* have TEXT_IS_SIMPLE_FLOW set. When TEXT_IS_SIMPLE_FLOW is set, there is
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* just one flow, the textrun's user data pointer is a pointer to mStartFrame
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* for that flow, mDOMOffsetToBeforeTransformOffset is zero, and mContentLength
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* is the length of the text node.
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*/
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struct TextRunUserData {
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TextRunMappedFlow* mMappedFlows;
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PRUint32 mMappedFlowCount;
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PRUint32 mLastFlowIndex;
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};
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/**
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* This helper object computes colors used for painting, and also IME
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* underline information. The data is computed lazily and cached as necessary.
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* These live for just the duration of one paint operation.
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*/
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class nsTextPaintStyle {
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public:
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nsTextPaintStyle(nsTextFrame* aFrame);
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nscolor GetTextColor();
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/**
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* Compute the colors for normally-selected text. Returns false if
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* the normal selection is not being displayed.
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*/
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PRBool GetSelectionColors(nscolor* aForeColor,
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nscolor* aBackColor);
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void GetHighlightColors(nscolor* aForeColor,
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nscolor* aBackColor);
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void GetURLSecondaryColor(nscolor* aForeColor);
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void GetIMESelectionColors(PRInt32 aIndex,
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nscolor* aForeColor,
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nscolor* aBackColor);
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// if this returns PR_FALSE, we don't need to draw underline.
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PRBool GetSelectionUnderlineForPaint(PRInt32 aIndex,
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nscolor* aLineColor,
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float* aRelativeSize,
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PRUint8* aStyle);
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// if this returns PR_FALSE, we don't need to draw underline.
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static PRBool GetSelectionUnderline(nsPresContext* aPresContext,
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PRInt32 aIndex,
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nscolor* aLineColor,
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float* aRelativeSize,
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PRUint8* aStyle);
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nsPresContext* PresContext() { return mPresContext; }
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enum {
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eIndexRawInput = 0,
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eIndexSelRawText,
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eIndexConvText,
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eIndexSelConvText,
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eIndexSpellChecker
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};
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static PRInt32 GetUnderlineStyleIndexForSelectionType(PRInt32 aSelectionType)
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{
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switch (aSelectionType) {
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case nsISelectionController::SELECTION_IME_RAWINPUT:
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return eIndexRawInput;
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case nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT:
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return eIndexSelRawText;
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case nsISelectionController::SELECTION_IME_CONVERTEDTEXT:
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return eIndexConvText;
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case nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT:
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return eIndexSelConvText;
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case nsISelectionController::SELECTION_SPELLCHECK:
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return eIndexSpellChecker;
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default:
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NS_WARNING("non-IME selection type");
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return eIndexRawInput;
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}
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}
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protected:
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nsTextFrame* mFrame;
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nsPresContext* mPresContext;
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PRPackedBool mInitCommonColors;
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PRPackedBool mInitSelectionColors;
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// Selection data
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PRInt16 mSelectionStatus; // see nsIDocument.h SetDisplaySelection()
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nscolor mSelectionTextColor;
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nscolor mSelectionBGColor;
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// Common data
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PRInt32 mSufficientContrast;
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nscolor mFrameBackgroundColor;
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// selection colors and underline info, the colors are resolved colors,
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// i.e., the foreground color and background color are swapped if it's needed.
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// And also line color will be resolved from them.
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struct nsSelectionStyle {
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PRBool mInit;
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nscolor mTextColor;
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nscolor mBGColor;
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nscolor mUnderlineColor;
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PRUint8 mUnderlineStyle;
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float mUnderlineRelativeSize;
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};
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nsSelectionStyle mSelectionStyle[5];
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// Color initializations
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void InitCommonColors();
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PRBool InitSelectionColors();
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nsSelectionStyle* GetSelectionStyle(PRInt32 aIndex);
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void InitSelectionStyle(PRInt32 aIndex);
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PRBool EnsureSufficientContrast(nscolor *aForeColor, nscolor *aBackColor);
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nscolor GetResolvedForeColor(nscolor aColor, nscolor aDefaultForeColor,
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nscolor aBackColor);
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};
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static void
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DestroyUserData(void* aUserData)
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{
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TextRunUserData* userData = static_cast<TextRunUserData*>(aUserData);
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if (userData) {
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nsMemory::Free(userData);
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}
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}
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/**
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* Remove |aTextRun| from the frame continuation chain starting at
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* |aStartContinuation| if non-null, otherwise starting at |aFrame|.
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* Unmark |aFrame| as a text run owner if it's the frame we start at.
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* Return PR_TRUE if |aStartContinuation| is non-null and was found
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* in the next-continuation chain of |aFrame|.
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*/
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static PRBool
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ClearAllTextRunReferences(nsTextFrame* aFrame, gfxTextRun* aTextRun,
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nsTextFrame* aStartContinuation)
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{
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NS_PRECONDITION(aFrame, "");
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NS_PRECONDITION(!aStartContinuation ||
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!aStartContinuation->GetTextRun() ||
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aStartContinuation->GetTextRun() == aTextRun,
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"wrong aStartContinuation for this text run");
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if (!aStartContinuation || aStartContinuation == aFrame) {
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aFrame->RemoveStateBits(TEXT_IN_TEXTRUN_USER_DATA);
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} else {
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do {
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NS_ASSERTION(aFrame->GetType() == nsGkAtoms::textFrame, "Bad frame");
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aFrame = static_cast<nsTextFrame*>(aFrame->GetNextContinuation());
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} while (aFrame && aFrame != aStartContinuation);
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}
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PRBool found = aStartContinuation == aFrame;
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while (aFrame) {
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NS_ASSERTION(aFrame->GetType() == nsGkAtoms::textFrame, "Bad frame");
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if (aFrame->GetTextRun() != aTextRun)
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break;
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aFrame->SetTextRun(nsnull);
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aFrame = static_cast<nsTextFrame*>(aFrame->GetNextContinuation());
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}
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NS_POSTCONDITION(!found || aStartContinuation, "how did we find null?");
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return found;
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}
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/**
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* Kill all references to |aTextRun| starting at |aStartContinuation|.
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* It could be referenced by any of its owners, and all their in-flows.
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* If |aStartContinuation| is null then process all userdata frames
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* and their continuations.
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* @note the caller is expected to take care of possibly destroying the
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* text run if all userdata frames were reset (userdata is deallocated
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* by this function though). The caller can detect this has occured by
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* checking |aTextRun->GetUserData() == nsnull|.
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*/
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static void
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UnhookTextRunFromFrames(gfxTextRun* aTextRun, nsTextFrame* aStartContinuation)
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{
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if (!aTextRun->GetUserData())
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return;
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if (aTextRun->GetFlags() & nsTextFrameUtils::TEXT_IS_SIMPLE_FLOW) {
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nsIFrame* userDataFrame = static_cast<nsIFrame*>(aTextRun->GetUserData());
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PRBool found =
|
|
ClearAllTextRunReferences(static_cast<nsTextFrame*>(userDataFrame),
|
|
aTextRun, aStartContinuation);
|
|
NS_ASSERTION(!aStartContinuation || found,
|
|
"aStartContinuation wasn't found in simple flow text run");
|
|
if (!(userDataFrame->GetStateBits() & TEXT_IN_TEXTRUN_USER_DATA)) {
|
|
aTextRun->SetUserData(nsnull);
|
|
}
|
|
} else {
|
|
TextRunUserData* userData =
|
|
static_cast<TextRunUserData*>(aTextRun->GetUserData());
|
|
PRInt32 destroyFromIndex = aStartContinuation ? -1 : 0;
|
|
for (PRUint32 i = 0; i < userData->mMappedFlowCount; ++i) {
|
|
nsTextFrame* userDataFrame = userData->mMappedFlows[i].mStartFrame;
|
|
PRBool found =
|
|
ClearAllTextRunReferences(userDataFrame, aTextRun,
|
|
aStartContinuation);
|
|
if (found) {
|
|
if (userDataFrame->GetStateBits() & TEXT_IN_TEXTRUN_USER_DATA) {
|
|
destroyFromIndex = i + 1;
|
|
}
|
|
else {
|
|
destroyFromIndex = i;
|
|
}
|
|
aStartContinuation = nsnull;
|
|
}
|
|
}
|
|
NS_ASSERTION(destroyFromIndex >= 0,
|
|
"aStartContinuation wasn't found in multi flow text run");
|
|
if (destroyFromIndex == 0) {
|
|
DestroyUserData(userData);
|
|
aTextRun->SetUserData(nsnull);
|
|
}
|
|
else {
|
|
userData->mMappedFlowCount = PRUint32(destroyFromIndex);
|
|
if (userData->mLastFlowIndex >= PRUint32(destroyFromIndex)) {
|
|
userData->mLastFlowIndex = PRUint32(destroyFromIndex) - 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
class FrameTextRunCache;
|
|
|
|
static FrameTextRunCache *gTextRuns = nsnull;
|
|
|
|
/*
|
|
* Cache textruns and expire them after 3*10 seconds of no use.
|
|
*/
|
|
class FrameTextRunCache : public nsExpirationTracker<gfxTextRun,3> {
|
|
public:
|
|
enum { TIMEOUT_SECONDS = 10 };
|
|
FrameTextRunCache()
|
|
: nsExpirationTracker<gfxTextRun,3>(TIMEOUT_SECONDS*1000) {}
|
|
~FrameTextRunCache() {
|
|
AgeAllGenerations();
|
|
}
|
|
|
|
void RemoveFromCache(gfxTextRun* aTextRun) {
|
|
if (aTextRun->GetExpirationState()->IsTracked()) {
|
|
RemoveObject(aTextRun);
|
|
}
|
|
if (aTextRun->GetFlags() & gfxTextRunWordCache::TEXT_IN_CACHE) {
|
|
gfxTextRunWordCache::RemoveTextRun(aTextRun);
|
|
}
|
|
}
|
|
|
|
// This gets called when the timeout has expired on a gfxTextRun
|
|
virtual void NotifyExpired(gfxTextRun* aTextRun) {
|
|
UnhookTextRunFromFrames(aTextRun, nsnull);
|
|
RemoveFromCache(aTextRun);
|
|
delete aTextRun;
|
|
}
|
|
};
|
|
|
|
static gfxTextRun *
|
|
MakeTextRun(const PRUnichar *aText, PRUint32 aLength,
|
|
gfxFontGroup *aFontGroup, const gfxFontGroup::Parameters* aParams,
|
|
PRUint32 aFlags)
|
|
{
|
|
nsAutoPtr<gfxTextRun> textRun;
|
|
if (aLength == 0) {
|
|
textRun = aFontGroup->MakeEmptyTextRun(aParams, aFlags);
|
|
} else if (aLength == 1 && aText[0] == ' ') {
|
|
textRun = aFontGroup->MakeSpaceTextRun(aParams, aFlags);
|
|
} else {
|
|
textRun = gfxTextRunWordCache::MakeTextRun(aText, aLength, aFontGroup,
|
|
aParams, aFlags);
|
|
}
|
|
if (!textRun)
|
|
return nsnull;
|
|
nsresult rv = gTextRuns->AddObject(textRun);
|
|
if (NS_FAILED(rv)) {
|
|
gTextRuns->RemoveFromCache(textRun);
|
|
return nsnull;
|
|
}
|
|
#ifdef NOISY_BIDI
|
|
printf("Created textrun\n");
|
|
#endif
|
|
return textRun.forget();
|
|
}
|
|
|
|
static gfxTextRun *
|
|
MakeTextRun(const PRUint8 *aText, PRUint32 aLength,
|
|
gfxFontGroup *aFontGroup, const gfxFontGroup::Parameters* aParams,
|
|
PRUint32 aFlags)
|
|
{
|
|
nsAutoPtr<gfxTextRun> textRun;
|
|
if (aLength == 0) {
|
|
textRun = aFontGroup->MakeEmptyTextRun(aParams, aFlags);
|
|
} else if (aLength == 1 && aText[0] == ' ') {
|
|
textRun = aFontGroup->MakeSpaceTextRun(aParams, aFlags);
|
|
} else {
|
|
textRun = gfxTextRunWordCache::MakeTextRun(aText, aLength, aFontGroup,
|
|
aParams, aFlags);
|
|
}
|
|
if (!textRun)
|
|
return nsnull;
|
|
nsresult rv = gTextRuns->AddObject(textRun);
|
|
if (NS_FAILED(rv)) {
|
|
gTextRuns->RemoveFromCache(textRun);
|
|
return nsnull;
|
|
}
|
|
#ifdef NOISY_BIDI
|
|
printf("Created textrun\n");
|
|
#endif
|
|
return textRun.forget();
|
|
}
|
|
|
|
nsresult
|
|
nsTextFrameTextRunCache::Init() {
|
|
gTextRuns = new FrameTextRunCache();
|
|
return gTextRuns ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
void
|
|
nsTextFrameTextRunCache::Shutdown() {
|
|
delete gTextRuns;
|
|
gTextRuns = nsnull;
|
|
}
|
|
|
|
PRInt32 nsTextFrame::GetContentEnd() const {
|
|
nsTextFrame* next = static_cast<nsTextFrame*>(GetNextContinuation());
|
|
return next ? next->GetContentOffset() : mContent->GetText()->GetLength();
|
|
}
|
|
|
|
struct FlowLengthProperty {
|
|
PRInt32 mStartOffset;
|
|
// The offset of the next fixed continuation after mStartOffset, or
|
|
// of the end of the text if there is none
|
|
PRInt32 mEndFlowOffset;
|
|
|
|
static void Destroy(void* aObject, nsIAtom* aPropertyName,
|
|
void* aPropertyValue, void* aData)
|
|
{
|
|
delete static_cast<FlowLengthProperty*>(aPropertyValue);
|
|
}
|
|
};
|
|
|
|
PRInt32 nsTextFrame::GetInFlowContentLength() {
|
|
if (!(mState & NS_FRAME_IS_BIDI)) {
|
|
return mContent->TextLength() - mContentOffset;
|
|
}
|
|
|
|
FlowLengthProperty* flowLength =
|
|
static_cast<FlowLengthProperty*>(mContent->GetProperty(nsGkAtoms::flowlength));
|
|
|
|
/**
|
|
* This frame must start inside the cached flow. If the flow starts at
|
|
* mContentOffset but this frame is empty, logically it might be before the
|
|
* start of the cached flow.
|
|
*/
|
|
if (flowLength &&
|
|
(flowLength->mStartOffset < mContentOffset ||
|
|
(flowLength->mStartOffset == mContentOffset && GetContentEnd() > mContentOffset)) &&
|
|
flowLength->mEndFlowOffset > mContentOffset) {
|
|
#ifdef DEBUG
|
|
NS_ASSERTION(flowLength->mEndFlowOffset >= GetContentEnd(),
|
|
"frame crosses fixed continuation boundary");
|
|
#endif
|
|
return flowLength->mEndFlowOffset - mContentOffset;
|
|
}
|
|
|
|
nsTextFrame* nextBidi = static_cast<nsTextFrame*>(GetLastInFlow()->GetNextContinuation());
|
|
PRInt32 endFlow = nextBidi ? nextBidi->GetContentOffset() : mContent->TextLength();
|
|
|
|
if (!flowLength) {
|
|
flowLength = new FlowLengthProperty;
|
|
if (NS_FAILED(mContent->SetProperty(nsGkAtoms::flowlength, flowLength,
|
|
FlowLengthProperty::Destroy))) {
|
|
delete flowLength;
|
|
flowLength = nsnull;
|
|
}
|
|
}
|
|
if (flowLength) {
|
|
flowLength->mStartOffset = mContentOffset;
|
|
flowLength->mEndFlowOffset = endFlow;
|
|
}
|
|
|
|
return endFlow - mContentOffset;
|
|
}
|
|
|
|
// Smarter versions of XP_IS_SPACE.
|
|
// Unicode is really annoying; sometimes a space character isn't whitespace ---
|
|
// when it combines with another character
|
|
// So we have several versions of IsSpace for use in different contexts.
|
|
|
|
static PRBool IsSpaceCombiningSequenceTail(const nsTextFragment* aFrag, PRUint32 aPos)
|
|
{
|
|
NS_ASSERTION(aPos <= aFrag->GetLength(), "Bad offset");
|
|
if (!aFrag->Is2b())
|
|
return PR_FALSE;
|
|
return nsTextFrameUtils::IsSpaceCombiningSequenceTail(
|
|
aFrag->Get2b() + aPos, aFrag->GetLength() - aPos);
|
|
}
|
|
|
|
// Check whether aPos is a space for CSS 'word-spacing' purposes
|
|
static PRBool IsCSSWordSpacingSpace(const nsTextFragment* aFrag,
|
|
PRUint32 aPos, const nsStyleText* aStyleText)
|
|
{
|
|
NS_ASSERTION(aPos < aFrag->GetLength(), "No text for IsSpace!");
|
|
|
|
PRUnichar ch = aFrag->CharAt(aPos);
|
|
switch (ch) {
|
|
case ' ':
|
|
case CH_NBSP:
|
|
return !IsSpaceCombiningSequenceTail(aFrag, aPos + 1);
|
|
case '\r':
|
|
case '\t': return !aStyleText->WhiteSpaceIsSignificant();
|
|
case '\n': return !aStyleText->NewlineIsSignificant();
|
|
default: return PR_FALSE;
|
|
}
|
|
}
|
|
|
|
// Check whether the string aChars/aLength starts with space that's
|
|
// trimmable according to CSS 'white-space:normal/nowrap'.
|
|
static PRBool IsTrimmableSpace(const PRUnichar* aChars, PRUint32 aLength)
|
|
{
|
|
NS_ASSERTION(aLength > 0, "No text for IsSpace!");
|
|
|
|
PRUnichar ch = *aChars;
|
|
if (ch == ' ')
|
|
return !nsTextFrameUtils::IsSpaceCombiningSequenceTail(aChars + 1, aLength - 1);
|
|
return ch == '\t' || ch == '\f' || ch == '\n' || ch == '\r';
|
|
}
|
|
|
|
// Check whether the character aCh is trimmable according to CSS
|
|
// 'white-space:normal/nowrap'
|
|
static PRBool IsTrimmableSpace(char aCh)
|
|
{
|
|
return aCh == ' ' || aCh == '\t' || aCh == '\f' || aCh == '\n' || aCh == '\r';
|
|
}
|
|
|
|
static PRBool IsTrimmableSpace(const nsTextFragment* aFrag, PRUint32 aPos,
|
|
const nsStyleText* aStyleText)
|
|
{
|
|
NS_ASSERTION(aPos < aFrag->GetLength(), "No text for IsSpace!");
|
|
|
|
switch (aFrag->CharAt(aPos)) {
|
|
case ' ': return !aStyleText->WhiteSpaceIsSignificant() &&
|
|
!IsSpaceCombiningSequenceTail(aFrag, aPos + 1);
|
|
case '\n': return !aStyleText->NewlineIsSignificant();
|
|
case '\t':
|
|
case '\r':
|
|
case '\f': return !aStyleText->WhiteSpaceIsSignificant();
|
|
default: return PR_FALSE;
|
|
}
|
|
}
|
|
|
|
static PRBool IsSelectionSpace(const nsTextFragment* aFrag, PRUint32 aPos)
|
|
{
|
|
NS_ASSERTION(aPos < aFrag->GetLength(), "No text for IsSpace!");
|
|
PRUnichar ch = aFrag->CharAt(aPos);
|
|
if (ch == ' ' || ch == CH_NBSP)
|
|
return !IsSpaceCombiningSequenceTail(aFrag, aPos + 1);
|
|
return ch == '\t' || ch == '\n' || ch == '\f' || ch == '\r';
|
|
}
|
|
|
|
// Count the amount of trimmable whitespace (as per CSS
|
|
// 'white-space:normal/nowrap') in a text fragment. The first
|
|
// character is at offset aStartOffset; the maximum number of characters
|
|
// to check is aLength. aDirection is -1 or 1 depending on whether we should
|
|
// progress backwards or forwards.
|
|
static PRUint32
|
|
GetTrimmableWhitespaceCount(const nsTextFragment* aFrag,
|
|
PRInt32 aStartOffset, PRInt32 aLength,
|
|
PRInt32 aDirection)
|
|
{
|
|
PRInt32 count = 0;
|
|
if (aFrag->Is2b()) {
|
|
const PRUnichar* str = aFrag->Get2b() + aStartOffset;
|
|
PRInt32 fragLen = aFrag->GetLength() - aStartOffset;
|
|
for (; count < aLength; ++count) {
|
|
if (!IsTrimmableSpace(str, fragLen))
|
|
break;
|
|
str += aDirection;
|
|
fragLen -= aDirection;
|
|
}
|
|
} else {
|
|
const char* str = aFrag->Get1b() + aStartOffset;
|
|
for (; count < aLength; ++count) {
|
|
if (!IsTrimmableSpace(*str))
|
|
break;
|
|
str += aDirection;
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
|
|
static PRBool
|
|
IsAllWhitespace(const nsTextFragment* aFrag, PRBool aAllowNewline)
|
|
{
|
|
if (aFrag->Is2b())
|
|
return PR_FALSE;
|
|
PRInt32 len = aFrag->GetLength();
|
|
const char* str = aFrag->Get1b();
|
|
for (PRInt32 i = 0; i < len; ++i) {
|
|
char ch = str[i];
|
|
if (ch == ' ' || ch == '\t' || ch == '\r' || (ch == '\n' && aAllowNewline))
|
|
continue;
|
|
return PR_FALSE;
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
/**
|
|
* This class accumulates state as we scan a paragraph of text. It detects
|
|
* textrun boundaries (changes from text to non-text, hard
|
|
* line breaks, and font changes) and builds a gfxTextRun at each boundary.
|
|
* It also detects linebreaker run boundaries (changes from text to non-text,
|
|
* and hard line breaks) and at each boundary runs the linebreaker to compute
|
|
* potential line breaks. It also records actual line breaks to store them in
|
|
* the textruns.
|
|
*/
|
|
class BuildTextRunsScanner {
|
|
public:
|
|
BuildTextRunsScanner(nsPresContext* aPresContext, gfxContext* aContext,
|
|
nsIFrame* aLineContainer) :
|
|
mCurrentFramesAllSameTextRun(nsnull),
|
|
mContext(aContext),
|
|
mLineContainer(aLineContainer),
|
|
mBidiEnabled(aPresContext->BidiEnabled()),
|
|
mSkipIncompleteTextRuns(PR_FALSE),
|
|
mNextRunContextInfo(nsTextFrameUtils::INCOMING_NONE),
|
|
mCurrentRunContextInfo(nsTextFrameUtils::INCOMING_NONE) {
|
|
ResetRunInfo();
|
|
}
|
|
~BuildTextRunsScanner() {
|
|
NS_ASSERTION(mBreakSinks.IsEmpty(), "Should have been cleared");
|
|
NS_ASSERTION(mTextRunsToDelete.IsEmpty(), "Should have been cleared");
|
|
NS_ASSERTION(mLineBreakBeforeFrames.IsEmpty(), "Should have been cleared");
|
|
NS_ASSERTION(mMappedFlows.IsEmpty(), "Should have been cleared");
|
|
}
|
|
|
|
void SetAtStartOfLine() {
|
|
mStartOfLine = PR_TRUE;
|
|
mCanStopOnThisLine = PR_FALSE;
|
|
}
|
|
void SetSkipIncompleteTextRuns(PRBool aSkip) {
|
|
mSkipIncompleteTextRuns = aSkip;
|
|
}
|
|
void SetCommonAncestorWithLastFrame(nsIFrame* aFrame) {
|
|
mCommonAncestorWithLastFrame = aFrame;
|
|
}
|
|
PRBool CanStopOnThisLine() {
|
|
return mCanStopOnThisLine;
|
|
}
|
|
nsIFrame* GetCommonAncestorWithLastFrame() {
|
|
return mCommonAncestorWithLastFrame;
|
|
}
|
|
void LiftCommonAncestorWithLastFrameToParent(nsIFrame* aFrame) {
|
|
if (mCommonAncestorWithLastFrame &&
|
|
mCommonAncestorWithLastFrame->GetParent() == aFrame) {
|
|
mCommonAncestorWithLastFrame = aFrame;
|
|
}
|
|
}
|
|
void ScanFrame(nsIFrame* aFrame);
|
|
PRBool IsTextRunValidForMappedFlows(gfxTextRun* aTextRun);
|
|
void FlushFrames(PRBool aFlushLineBreaks, PRBool aSuppressTrailingBreak);
|
|
void FlushLineBreaks(gfxTextRun* aTrailingTextRun);
|
|
void ResetRunInfo() {
|
|
mLastFrame = nsnull;
|
|
mMappedFlows.Clear();
|
|
mLineBreakBeforeFrames.Clear();
|
|
mMaxTextLength = 0;
|
|
mDoubleByteText = PR_FALSE;
|
|
}
|
|
void AccumulateRunInfo(nsTextFrame* aFrame);
|
|
/**
|
|
* @return null to indicate either textrun construction failed or
|
|
* we constructed just a partial textrun to set up linebreaker and other
|
|
* state for following textruns.
|
|
*/
|
|
gfxTextRun* BuildTextRunForFrames(void* aTextBuffer);
|
|
void AssignTextRun(gfxTextRun* aTextRun);
|
|
nsTextFrame* GetNextBreakBeforeFrame(PRUint32* aIndex);
|
|
void SetupBreakSinksForTextRun(gfxTextRun* aTextRun, PRBool aIsExistingTextRun,
|
|
PRBool aSuppressSink);
|
|
struct FindBoundaryState {
|
|
nsIFrame* mStopAtFrame;
|
|
nsTextFrame* mFirstTextFrame;
|
|
nsTextFrame* mLastTextFrame;
|
|
PRPackedBool mSeenTextRunBoundaryOnLaterLine;
|
|
PRPackedBool mSeenTextRunBoundaryOnThisLine;
|
|
PRPackedBool mSeenSpaceForLineBreakingOnThisLine;
|
|
};
|
|
enum FindBoundaryResult {
|
|
FB_CONTINUE,
|
|
FB_STOPPED_AT_STOP_FRAME,
|
|
FB_FOUND_VALID_TEXTRUN_BOUNDARY
|
|
};
|
|
FindBoundaryResult FindBoundaries(nsIFrame* aFrame, FindBoundaryState* aState);
|
|
|
|
PRBool ContinueTextRunAcrossFrames(nsTextFrame* aFrame1, nsTextFrame* aFrame2);
|
|
|
|
// Like TextRunMappedFlow but with some differences. mStartFrame to mEndFrame
|
|
// (exclusive) are a sequence of in-flow frames (if mEndFrame is null, then
|
|
// continuations starting from mStartFrame are a sequence of in-flow frames).
|
|
struct MappedFlow {
|
|
nsTextFrame* mStartFrame;
|
|
nsTextFrame* mEndFrame;
|
|
// When we consider breaking between elements, the nearest common
|
|
// ancestor of the elements containing the characters is the one whose
|
|
// CSS 'white-space' property governs. So this records the nearest common
|
|
// ancestor of mStartFrame and the previous text frame, or null if there
|
|
// was no previous text frame on this line.
|
|
nsIFrame* mAncestorControllingInitialBreak;
|
|
|
|
PRInt32 GetContentEnd() {
|
|
return mEndFrame ? mEndFrame->GetContentOffset()
|
|
: mStartFrame->GetContent()->GetText()->GetLength();
|
|
}
|
|
};
|
|
|
|
class BreakSink : public nsILineBreakSink {
|
|
public:
|
|
BreakSink(gfxTextRun* aTextRun, gfxContext* aContext, PRUint32 aOffsetIntoTextRun,
|
|
PRBool aExistingTextRun) :
|
|
mTextRun(aTextRun), mContext(aContext),
|
|
mOffsetIntoTextRun(aOffsetIntoTextRun),
|
|
mChangedBreaks(PR_FALSE), mExistingTextRun(aExistingTextRun) {}
|
|
|
|
virtual void SetBreaks(PRUint32 aOffset, PRUint32 aLength,
|
|
PRUint8* aBreakBefore) {
|
|
if (mTextRun->SetPotentialLineBreaks(aOffset + mOffsetIntoTextRun, aLength,
|
|
aBreakBefore, mContext)) {
|
|
mChangedBreaks = PR_TRUE;
|
|
// Be conservative and assume that some breaks have been set
|
|
mTextRun->ClearFlagBits(nsTextFrameUtils::TEXT_NO_BREAKS);
|
|
}
|
|
}
|
|
|
|
virtual void SetCapitalization(PRUint32 aOffset, PRUint32 aLength,
|
|
PRPackedBool* aCapitalize) {
|
|
NS_ASSERTION(mTextRun->GetFlags() & nsTextFrameUtils::TEXT_IS_TRANSFORMED,
|
|
"Text run should be transformed!");
|
|
nsTransformedTextRun* transformedTextRun =
|
|
static_cast<nsTransformedTextRun*>(mTextRun);
|
|
transformedTextRun->SetCapitalization(aOffset + mOffsetIntoTextRun, aLength,
|
|
aCapitalize, mContext);
|
|
}
|
|
|
|
void Finish() {
|
|
NS_ASSERTION(!(mTextRun->GetFlags() &
|
|
(gfxTextRunWordCache::TEXT_UNUSED_FLAGS |
|
|
nsTextFrameUtils::TEXT_UNUSED_FLAG)),
|
|
"Flag set that should never be set! (memory safety error?)");
|
|
if (mTextRun->GetFlags() & nsTextFrameUtils::TEXT_IS_TRANSFORMED) {
|
|
nsTransformedTextRun* transformedTextRun =
|
|
static_cast<nsTransformedTextRun*>(mTextRun);
|
|
transformedTextRun->FinishSettingProperties(mContext);
|
|
}
|
|
}
|
|
|
|
gfxTextRun* mTextRun;
|
|
gfxContext* mContext;
|
|
PRUint32 mOffsetIntoTextRun;
|
|
PRPackedBool mChangedBreaks;
|
|
PRPackedBool mExistingTextRun;
|
|
};
|
|
|
|
private:
|
|
nsAutoTArray<MappedFlow,10> mMappedFlows;
|
|
nsAutoTArray<nsTextFrame*,50> mLineBreakBeforeFrames;
|
|
nsAutoTArray<nsAutoPtr<BreakSink>,10> mBreakSinks;
|
|
nsAutoTArray<gfxTextRun*,5> mTextRunsToDelete;
|
|
nsLineBreaker mLineBreaker;
|
|
gfxTextRun* mCurrentFramesAllSameTextRun;
|
|
gfxContext* mContext;
|
|
nsIFrame* mLineContainer;
|
|
nsTextFrame* mLastFrame;
|
|
// The common ancestor of the current frame and the previous leaf frame
|
|
// on the line, or null if there was no previous leaf frame.
|
|
nsIFrame* mCommonAncestorWithLastFrame;
|
|
// mMaxTextLength is an upper bound on the size of the text in all mapped frames
|
|
// The value PR_UINT32_MAX represents overflow; text will be discarded
|
|
PRUint32 mMaxTextLength;
|
|
PRPackedBool mDoubleByteText;
|
|
PRPackedBool mBidiEnabled;
|
|
PRPackedBool mStartOfLine;
|
|
PRPackedBool mSkipIncompleteTextRuns;
|
|
PRPackedBool mCanStopOnThisLine;
|
|
PRUint8 mNextRunContextInfo;
|
|
PRUint8 mCurrentRunContextInfo;
|
|
};
|
|
|
|
static nsIFrame*
|
|
FindLineContainer(nsIFrame* aFrame)
|
|
{
|
|
while (aFrame && aFrame->CanContinueTextRun()) {
|
|
aFrame = aFrame->GetParent();
|
|
}
|
|
return aFrame;
|
|
}
|
|
|
|
static PRBool
|
|
IsLineBreakingWhiteSpace(PRUnichar aChar)
|
|
{
|
|
// 0x0A (\n) is not handled as white-space by the line breaker, since
|
|
// we break before it, if it isn't transformed to a normal space.
|
|
// (If we treat it as normal white-space then we'd only break after it.)
|
|
// However, it does induce a line break or is converted to a regular
|
|
// space, and either way it can be used to bound the region of text
|
|
// that needs to be analyzed for line breaking.
|
|
return nsLineBreaker::IsSpace(aChar) || aChar == 0x0A;
|
|
}
|
|
|
|
static PRBool
|
|
TextContainsLineBreakerWhiteSpace(const void* aText, PRUint32 aLength,
|
|
PRBool aIsDoubleByte)
|
|
{
|
|
PRUint32 i;
|
|
if (aIsDoubleByte) {
|
|
const PRUnichar* chars = static_cast<const PRUnichar*>(aText);
|
|
for (i = 0; i < aLength; ++i) {
|
|
if (IsLineBreakingWhiteSpace(chars[i]))
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
} else {
|
|
const PRUint8* chars = static_cast<const PRUint8*>(aText);
|
|
for (i = 0; i < aLength; ++i) {
|
|
if (IsLineBreakingWhiteSpace(chars[i]))
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
}
|
|
|
|
struct FrameTextTraversal {
|
|
// These fields identify which frames should be recursively scanned
|
|
// The first normal frame to scan (or null, if no such frame should be scanned)
|
|
nsIFrame* mFrameToScan;
|
|
// The first overflow frame to scan (or null, if no such frame should be scanned)
|
|
nsIFrame* mOverflowFrameToScan;
|
|
// Whether to scan the siblings of mFrameToDescendInto/mOverflowFrameToDescendInto
|
|
PRPackedBool mScanSiblings;
|
|
|
|
// These identify the boundaries of the context required for
|
|
// line breaking or textrun construction
|
|
PRPackedBool mLineBreakerCanCrossFrameBoundary;
|
|
PRPackedBool mTextRunCanCrossFrameBoundary;
|
|
|
|
nsIFrame* NextFrameToScan() {
|
|
nsIFrame* f;
|
|
if (mFrameToScan) {
|
|
f = mFrameToScan;
|
|
mFrameToScan = mScanSiblings ? f->GetNextSibling() : nsnull;
|
|
} else if (mOverflowFrameToScan) {
|
|
f = mOverflowFrameToScan;
|
|
mOverflowFrameToScan = mScanSiblings ? f->GetNextSibling() : nsnull;
|
|
} else {
|
|
f = nsnull;
|
|
}
|
|
return f;
|
|
}
|
|
};
|
|
|
|
static FrameTextTraversal
|
|
CanTextCrossFrameBoundary(nsIFrame* aFrame, nsIAtom* aType)
|
|
{
|
|
NS_ASSERTION(aType == aFrame->GetType(), "Wrong type");
|
|
|
|
FrameTextTraversal result;
|
|
|
|
PRBool continuesTextRun = aFrame->CanContinueTextRun();
|
|
if (aType == nsGkAtoms::placeholderFrame) {
|
|
// placeholders are "invisible", so a text run should be able to span
|
|
// across one. But don't descend into the out-of-flow.
|
|
result.mLineBreakerCanCrossFrameBoundary = PR_TRUE;
|
|
result.mOverflowFrameToScan = nsnull;
|
|
if (continuesTextRun) {
|
|
// ... Except for first-letter floats, which are really in-flow
|
|
// from the point of view of capitalization etc, so we'd better
|
|
// descend into them. But we actually need to break the textrun for
|
|
// first-letter floats since things look bad if, say, we try to make a
|
|
// ligature across the float boundary.
|
|
result.mFrameToScan =
|
|
(static_cast<nsPlaceholderFrame*>(aFrame))->GetOutOfFlowFrame();
|
|
result.mScanSiblings = PR_FALSE;
|
|
result.mTextRunCanCrossFrameBoundary = PR_FALSE;
|
|
} else {
|
|
result.mFrameToScan = nsnull;
|
|
result.mTextRunCanCrossFrameBoundary = PR_TRUE;
|
|
}
|
|
} else {
|
|
if (continuesTextRun) {
|
|
result.mFrameToScan = aFrame->GetFirstChild(nsnull);
|
|
result.mOverflowFrameToScan = aFrame->GetFirstChild(nsGkAtoms::overflowList);
|
|
NS_WARN_IF_FALSE(!result.mOverflowFrameToScan,
|
|
"Scanning overflow inline frames is something we should avoid");
|
|
result.mScanSiblings = PR_TRUE;
|
|
result.mTextRunCanCrossFrameBoundary = PR_TRUE;
|
|
result.mLineBreakerCanCrossFrameBoundary = PR_TRUE;
|
|
} else {
|
|
result.mFrameToScan = nsnull;
|
|
result.mOverflowFrameToScan = nsnull;
|
|
result.mTextRunCanCrossFrameBoundary = PR_FALSE;
|
|
result.mLineBreakerCanCrossFrameBoundary = PR_FALSE;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
BuildTextRunsScanner::FindBoundaryResult
|
|
BuildTextRunsScanner::FindBoundaries(nsIFrame* aFrame, FindBoundaryState* aState)
|
|
{
|
|
nsIAtom* frameType = aFrame->GetType();
|
|
nsTextFrame* textFrame = frameType == nsGkAtoms::textFrame
|
|
? static_cast<nsTextFrame*>(aFrame) : nsnull;
|
|
if (textFrame) {
|
|
if (aState->mLastTextFrame &&
|
|
textFrame != aState->mLastTextFrame->GetNextInFlow() &&
|
|
!ContinueTextRunAcrossFrames(aState->mLastTextFrame, textFrame)) {
|
|
aState->mSeenTextRunBoundaryOnThisLine = PR_TRUE;
|
|
if (aState->mSeenSpaceForLineBreakingOnThisLine)
|
|
return FB_FOUND_VALID_TEXTRUN_BOUNDARY;
|
|
}
|
|
if (!aState->mFirstTextFrame) {
|
|
aState->mFirstTextFrame = textFrame;
|
|
}
|
|
aState->mLastTextFrame = textFrame;
|
|
}
|
|
|
|
if (aFrame == aState->mStopAtFrame)
|
|
return FB_STOPPED_AT_STOP_FRAME;
|
|
|
|
if (textFrame) {
|
|
if (!aState->mSeenSpaceForLineBreakingOnThisLine) {
|
|
const nsTextFragment* frag = textFrame->GetContent()->GetText();
|
|
PRUint32 start = textFrame->GetContentOffset();
|
|
const void* text = frag->Is2b()
|
|
? static_cast<const void*>(frag->Get2b() + start)
|
|
: static_cast<const void*>(frag->Get1b() + start);
|
|
if (TextContainsLineBreakerWhiteSpace(text, textFrame->GetContentLength(),
|
|
frag->Is2b())) {
|
|
aState->mSeenSpaceForLineBreakingOnThisLine = PR_TRUE;
|
|
if (aState->mSeenTextRunBoundaryOnLaterLine)
|
|
return FB_FOUND_VALID_TEXTRUN_BOUNDARY;
|
|
}
|
|
}
|
|
return FB_CONTINUE;
|
|
}
|
|
|
|
FrameTextTraversal traversal =
|
|
CanTextCrossFrameBoundary(aFrame, frameType);
|
|
if (!traversal.mTextRunCanCrossFrameBoundary) {
|
|
aState->mSeenTextRunBoundaryOnThisLine = PR_TRUE;
|
|
if (aState->mSeenSpaceForLineBreakingOnThisLine)
|
|
return FB_FOUND_VALID_TEXTRUN_BOUNDARY;
|
|
}
|
|
|
|
for (nsIFrame* f = traversal.NextFrameToScan(); f;
|
|
f = traversal.NextFrameToScan()) {
|
|
FindBoundaryResult result = FindBoundaries(f, aState);
|
|
if (result != FB_CONTINUE)
|
|
return result;
|
|
}
|
|
|
|
if (!traversal.mTextRunCanCrossFrameBoundary) {
|
|
aState->mSeenTextRunBoundaryOnThisLine = PR_TRUE;
|
|
if (aState->mSeenSpaceForLineBreakingOnThisLine)
|
|
return FB_FOUND_VALID_TEXTRUN_BOUNDARY;
|
|
}
|
|
|
|
return FB_CONTINUE;
|
|
}
|
|
|
|
// build text runs for the 200 lines following aForFrame, and stop after that
|
|
// when we get a chance.
|
|
#define NUM_LINES_TO_BUILD_TEXT_RUNS 200
|
|
|
|
/**
|
|
* General routine for building text runs. This is hairy because of the need
|
|
* to build text runs that span content nodes.
|
|
*
|
|
* @param aForFrameLine the line containing aForFrame; if null, we'll figure
|
|
* out the line (slowly)
|
|
* @param aLineContainer the line container containing aForFrame; if null,
|
|
* we'll walk the ancestors to find it. It's required to be non-null when
|
|
* aForFrameLine is non-null.
|
|
*/
|
|
static void
|
|
BuildTextRuns(gfxContext* aContext, nsTextFrame* aForFrame,
|
|
nsIFrame* aLineContainer,
|
|
const nsLineList::iterator* aForFrameLine)
|
|
{
|
|
NS_ASSERTION(aForFrame || aLineContainer,
|
|
"One of aForFrame or aLineContainer must be set!");
|
|
NS_ASSERTION(!aForFrameLine || aLineContainer,
|
|
"line but no line container");
|
|
|
|
if (!aLineContainer) {
|
|
aLineContainer = FindLineContainer(aForFrame);
|
|
} else {
|
|
NS_ASSERTION(!aForFrame ||
|
|
(aLineContainer == FindLineContainer(aForFrame) ||
|
|
(aLineContainer->GetType() == nsGkAtoms::letterFrame &&
|
|
aLineContainer->GetStyleDisplay()->IsFloating())),
|
|
"Wrong line container hint");
|
|
}
|
|
|
|
nsPresContext* presContext = aLineContainer->PresContext();
|
|
BuildTextRunsScanner scanner(presContext, aContext, aLineContainer);
|
|
|
|
nsBlockFrame* block = nsLayoutUtils::GetAsBlock(aLineContainer);
|
|
|
|
if (!block) {
|
|
NS_ASSERTION(!aLineContainer->GetPrevInFlow() && !aLineContainer->GetNextInFlow(),
|
|
"Breakable non-block line containers not supported");
|
|
// Just loop through all the children of the linecontainer ... it's really
|
|
// just one line
|
|
scanner.SetAtStartOfLine();
|
|
scanner.SetCommonAncestorWithLastFrame(nsnull);
|
|
nsIFrame* child = aLineContainer->GetFirstChild(nsnull);
|
|
while (child) {
|
|
scanner.ScanFrame(child);
|
|
child = child->GetNextSibling();
|
|
}
|
|
// Set mStartOfLine so FlushFrames knows its textrun ends a line
|
|
scanner.SetAtStartOfLine();
|
|
scanner.FlushFrames(PR_TRUE, PR_FALSE);
|
|
return;
|
|
}
|
|
|
|
// Find the line containing aForFrame
|
|
|
|
PRBool isValid = PR_TRUE;
|
|
nsBlockInFlowLineIterator backIterator(block, &isValid);
|
|
if (aForFrameLine) {
|
|
backIterator = nsBlockInFlowLineIterator(block, *aForFrameLine, PR_FALSE);
|
|
} else {
|
|
backIterator = nsBlockInFlowLineIterator(block, aForFrame, &isValid);
|
|
NS_ASSERTION(isValid, "aForFrame not found in block, someone lied to us");
|
|
NS_ASSERTION(backIterator.GetContainer() == block,
|
|
"Someone lied to us about the block");
|
|
}
|
|
nsBlockFrame::line_iterator startLine = backIterator.GetLine();
|
|
|
|
// Find a line where we can start building text runs. We choose the last line
|
|
// where:
|
|
// -- there is a textrun boundary between the start of the line and the
|
|
// start of aForFrame
|
|
// -- there is a space between the start of the line and the textrun boundary
|
|
// (this is so we can be sure the line breaks will be set properly
|
|
// on the textruns we construct).
|
|
// The possibly-partial text runs up to and including the first space
|
|
// are not reconstructed. We construct partial text runs for that text ---
|
|
// for the sake of simplifying the code and feeding the linebreaker ---
|
|
// but we discard them instead of assigning them to frames.
|
|
// This is a little awkward because we traverse lines in the reverse direction
|
|
// but we traverse the frames in each line in the forward direction.
|
|
nsBlockInFlowLineIterator forwardIterator = backIterator;
|
|
nsTextFrame* stopAtFrame = aForFrame;
|
|
nsTextFrame* nextLineFirstTextFrame = nsnull;
|
|
PRBool seenTextRunBoundaryOnLaterLine = PR_FALSE;
|
|
PRBool mayBeginInTextRun = PR_TRUE;
|
|
while (PR_TRUE) {
|
|
forwardIterator = backIterator;
|
|
nsBlockFrame::line_iterator line = backIterator.GetLine();
|
|
if (!backIterator.Prev() || backIterator.GetLine()->IsBlock()) {
|
|
mayBeginInTextRun = PR_FALSE;
|
|
break;
|
|
}
|
|
|
|
BuildTextRunsScanner::FindBoundaryState state = { stopAtFrame, nsnull, nsnull,
|
|
PRPackedBool(seenTextRunBoundaryOnLaterLine), PR_FALSE, PR_FALSE };
|
|
nsIFrame* child = line->mFirstChild;
|
|
PRBool foundBoundary = PR_FALSE;
|
|
PRInt32 i;
|
|
for (i = line->GetChildCount() - 1; i >= 0; --i) {
|
|
BuildTextRunsScanner::FindBoundaryResult result =
|
|
scanner.FindBoundaries(child, &state);
|
|
if (result == BuildTextRunsScanner::FB_FOUND_VALID_TEXTRUN_BOUNDARY) {
|
|
foundBoundary = PR_TRUE;
|
|
break;
|
|
} else if (result == BuildTextRunsScanner::FB_STOPPED_AT_STOP_FRAME) {
|
|
break;
|
|
}
|
|
child = child->GetNextSibling();
|
|
}
|
|
if (foundBoundary)
|
|
break;
|
|
if (!stopAtFrame && state.mLastTextFrame && nextLineFirstTextFrame &&
|
|
!scanner.ContinueTextRunAcrossFrames(state.mLastTextFrame, nextLineFirstTextFrame)) {
|
|
// Found a usable textrun boundary at the end of the line
|
|
if (state.mSeenSpaceForLineBreakingOnThisLine)
|
|
break;
|
|
seenTextRunBoundaryOnLaterLine = PR_TRUE;
|
|
} else if (state.mSeenTextRunBoundaryOnThisLine) {
|
|
seenTextRunBoundaryOnLaterLine = PR_TRUE;
|
|
}
|
|
stopAtFrame = nsnull;
|
|
if (state.mFirstTextFrame) {
|
|
nextLineFirstTextFrame = state.mFirstTextFrame;
|
|
}
|
|
}
|
|
scanner.SetSkipIncompleteTextRuns(mayBeginInTextRun);
|
|
|
|
// Now iterate over all text frames starting from the current line. First-in-flow
|
|
// text frames will be accumulated into textRunFrames as we go. When a
|
|
// text run boundary is required we flush textRunFrames ((re)building their
|
|
// gfxTextRuns as necessary).
|
|
PRBool seenStartLine = PR_FALSE;
|
|
PRUint32 linesAfterStartLine = 0;
|
|
do {
|
|
nsBlockFrame::line_iterator line = forwardIterator.GetLine();
|
|
if (line->IsBlock())
|
|
break;
|
|
line->SetInvalidateTextRuns(PR_FALSE);
|
|
scanner.SetAtStartOfLine();
|
|
scanner.SetCommonAncestorWithLastFrame(nsnull);
|
|
nsIFrame* child = line->mFirstChild;
|
|
PRInt32 i;
|
|
for (i = line->GetChildCount() - 1; i >= 0; --i) {
|
|
scanner.ScanFrame(child);
|
|
child = child->GetNextSibling();
|
|
}
|
|
if (line.get() == startLine.get()) {
|
|
seenStartLine = PR_TRUE;
|
|
}
|
|
if (seenStartLine) {
|
|
++linesAfterStartLine;
|
|
if (linesAfterStartLine >= NUM_LINES_TO_BUILD_TEXT_RUNS && scanner.CanStopOnThisLine()) {
|
|
// Don't flush frames; we may be in the middle of a textrun
|
|
// that we can't end here. That's OK, we just won't build it.
|
|
// Note that we must already have finished the textrun for aForFrame,
|
|
// because we've seen the end of a textrun in a line after the line
|
|
// containing aForFrame.
|
|
scanner.FlushLineBreaks(nsnull);
|
|
// This flushes out mMappedFlows and mLineBreakBeforeFrames, which
|
|
// silences assertions in the scanner destructor.
|
|
scanner.ResetRunInfo();
|
|
return;
|
|
}
|
|
}
|
|
} while (forwardIterator.Next());
|
|
|
|
// Set mStartOfLine so FlushFrames knows its textrun ends a line
|
|
scanner.SetAtStartOfLine();
|
|
scanner.FlushFrames(PR_TRUE, PR_FALSE);
|
|
}
|
|
|
|
static PRUnichar*
|
|
ExpandBuffer(PRUnichar* aDest, PRUint8* aSrc, PRUint32 aCount)
|
|
{
|
|
while (aCount) {
|
|
*aDest = *aSrc;
|
|
++aDest;
|
|
++aSrc;
|
|
--aCount;
|
|
}
|
|
return aDest;
|
|
}
|
|
|
|
PRBool BuildTextRunsScanner::IsTextRunValidForMappedFlows(gfxTextRun* aTextRun)
|
|
{
|
|
if (aTextRun->GetFlags() & nsTextFrameUtils::TEXT_IS_SIMPLE_FLOW)
|
|
return mMappedFlows.Length() == 1 &&
|
|
mMappedFlows[0].mStartFrame == static_cast<nsTextFrame*>(aTextRun->GetUserData()) &&
|
|
mMappedFlows[0].mEndFrame == nsnull;
|
|
|
|
TextRunUserData* userData = static_cast<TextRunUserData*>(aTextRun->GetUserData());
|
|
if (userData->mMappedFlowCount != mMappedFlows.Length())
|
|
return PR_FALSE;
|
|
PRUint32 i;
|
|
for (i = 0; i < mMappedFlows.Length(); ++i) {
|
|
if (userData->mMappedFlows[i].mStartFrame != mMappedFlows[i].mStartFrame ||
|
|
PRInt32(userData->mMappedFlows[i].mContentLength) !=
|
|
mMappedFlows[i].GetContentEnd() - mMappedFlows[i].mStartFrame->GetContentOffset())
|
|
return PR_FALSE;
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
/**
|
|
* This gets called when we need to make a text run for the current list of
|
|
* frames.
|
|
*/
|
|
void BuildTextRunsScanner::FlushFrames(PRBool aFlushLineBreaks, PRBool aSuppressTrailingBreak)
|
|
{
|
|
gfxTextRun* textRun = nsnull;
|
|
if (!mMappedFlows.IsEmpty()) {
|
|
if (!mSkipIncompleteTextRuns && mCurrentFramesAllSameTextRun &&
|
|
((mCurrentFramesAllSameTextRun->GetFlags() & nsTextFrameUtils::TEXT_INCOMING_WHITESPACE) != 0) ==
|
|
((mCurrentRunContextInfo & nsTextFrameUtils::INCOMING_WHITESPACE) != 0) &&
|
|
((mCurrentFramesAllSameTextRun->GetFlags() & gfxTextRunWordCache::TEXT_INCOMING_ARABICCHAR) != 0) ==
|
|
((mCurrentRunContextInfo & nsTextFrameUtils::INCOMING_ARABICCHAR) != 0) &&
|
|
IsTextRunValidForMappedFlows(mCurrentFramesAllSameTextRun)) {
|
|
// Optimization: We do not need to (re)build the textrun.
|
|
textRun = mCurrentFramesAllSameTextRun;
|
|
|
|
// Feed this run's text into the linebreaker to provide context. This also
|
|
// updates mNextRunContextInfo appropriately.
|
|
SetupBreakSinksForTextRun(textRun, PR_TRUE, PR_FALSE);
|
|
mNextRunContextInfo = nsTextFrameUtils::INCOMING_NONE;
|
|
if (textRun->GetFlags() & nsTextFrameUtils::TEXT_TRAILING_WHITESPACE) {
|
|
mNextRunContextInfo |= nsTextFrameUtils::INCOMING_WHITESPACE;
|
|
}
|
|
if (textRun->GetFlags() & gfxTextRunWordCache::TEXT_TRAILING_ARABICCHAR) {
|
|
mNextRunContextInfo |= nsTextFrameUtils::INCOMING_ARABICCHAR;
|
|
}
|
|
} else {
|
|
nsAutoTArray<PRUint8,BIG_TEXT_NODE_SIZE> buffer;
|
|
PRUint32 bufferSize = mMaxTextLength*(mDoubleByteText ? 2 : 1);
|
|
if (bufferSize < mMaxTextLength || bufferSize == PR_UINT32_MAX ||
|
|
!buffer.AppendElements(bufferSize)) {
|
|
return;
|
|
}
|
|
textRun = BuildTextRunForFrames(buffer.Elements());
|
|
}
|
|
}
|
|
|
|
if (aFlushLineBreaks) {
|
|
FlushLineBreaks(aSuppressTrailingBreak ? nsnull : textRun);
|
|
}
|
|
|
|
mCanStopOnThisLine = PR_TRUE;
|
|
ResetRunInfo();
|
|
}
|
|
|
|
void BuildTextRunsScanner::FlushLineBreaks(gfxTextRun* aTrailingTextRun)
|
|
{
|
|
PRBool trailingLineBreak;
|
|
nsresult rv = mLineBreaker.Reset(&trailingLineBreak);
|
|
// textRun may be null for various reasons, including because we constructed
|
|
// a partial textrun just to get the linebreaker and other state set up
|
|
// to build the next textrun.
|
|
if (NS_SUCCEEDED(rv) && trailingLineBreak && aTrailingTextRun) {
|
|
aTrailingTextRun->SetFlagBits(nsTextFrameUtils::TEXT_HAS_TRAILING_BREAK);
|
|
}
|
|
|
|
PRUint32 i;
|
|
for (i = 0; i < mBreakSinks.Length(); ++i) {
|
|
if (!mBreakSinks[i]->mExistingTextRun || mBreakSinks[i]->mChangedBreaks) {
|
|
// TODO cause frames associated with the textrun to be reflowed, if they
|
|
// aren't being reflowed already!
|
|
}
|
|
mBreakSinks[i]->Finish();
|
|
}
|
|
mBreakSinks.Clear();
|
|
|
|
for (i = 0; i < mTextRunsToDelete.Length(); ++i) {
|
|
gfxTextRun* deleteTextRun = mTextRunsToDelete[i];
|
|
gTextRuns->RemoveFromCache(deleteTextRun);
|
|
delete deleteTextRun;
|
|
}
|
|
mTextRunsToDelete.Clear();
|
|
}
|
|
|
|
void BuildTextRunsScanner::AccumulateRunInfo(nsTextFrame* aFrame)
|
|
{
|
|
if (mMaxTextLength != PR_UINT32_MAX) {
|
|
NS_ASSERTION(mMaxTextLength < PR_UINT32_MAX - aFrame->GetContentLength(), "integer overflow");
|
|
if (mMaxTextLength >= PR_UINT32_MAX - aFrame->GetContentLength()) {
|
|
mMaxTextLength = PR_UINT32_MAX;
|
|
} else {
|
|
mMaxTextLength += aFrame->GetContentLength();
|
|
}
|
|
}
|
|
mDoubleByteText |= aFrame->GetContent()->GetText()->Is2b();
|
|
mLastFrame = aFrame;
|
|
mCommonAncestorWithLastFrame = aFrame->GetParent();
|
|
|
|
MappedFlow* mappedFlow = &mMappedFlows[mMappedFlows.Length() - 1];
|
|
NS_ASSERTION(mappedFlow->mStartFrame == aFrame ||
|
|
mappedFlow->GetContentEnd() == aFrame->GetContentOffset(),
|
|
"Overlapping or discontiguous frames => BAD");
|
|
mappedFlow->mEndFrame = static_cast<nsTextFrame*>(aFrame->GetNextContinuation());
|
|
if (mCurrentFramesAllSameTextRun != aFrame->GetTextRun()) {
|
|
mCurrentFramesAllSameTextRun = nsnull;
|
|
}
|
|
|
|
if (mStartOfLine) {
|
|
mLineBreakBeforeFrames.AppendElement(aFrame);
|
|
mStartOfLine = PR_FALSE;
|
|
}
|
|
}
|
|
|
|
static nscoord StyleToCoord(const nsStyleCoord& aCoord)
|
|
{
|
|
if (eStyleUnit_Coord == aCoord.GetUnit()) {
|
|
return aCoord.GetCoordValue();
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static PRBool
|
|
HasTerminalNewline(const nsTextFrame* aFrame)
|
|
{
|
|
if (aFrame->GetContentLength() == 0)
|
|
return PR_FALSE;
|
|
const nsTextFragment* frag = aFrame->GetContent()->GetText();
|
|
return frag->CharAt(aFrame->GetContentEnd() - 1) == '\n';
|
|
}
|
|
|
|
PRBool
|
|
BuildTextRunsScanner::ContinueTextRunAcrossFrames(nsTextFrame* aFrame1, nsTextFrame* aFrame2)
|
|
{
|
|
if (mBidiEnabled &&
|
|
NS_GET_EMBEDDING_LEVEL(aFrame1) != NS_GET_EMBEDDING_LEVEL(aFrame2))
|
|
return PR_FALSE;
|
|
|
|
nsStyleContext* sc1 = aFrame1->GetStyleContext();
|
|
const nsStyleText* textStyle1 = sc1->GetStyleText();
|
|
// If the first frame ends in a preformatted newline, then we end the textrun
|
|
// here. This avoids creating giant textruns for an entire plain text file.
|
|
// Note that we create a single text frame for a preformatted text node,
|
|
// even if it has newlines in it, so typically we won't see trailing newlines
|
|
// until after reflow has broken up the frame into one (or more) frames per
|
|
// line. That's OK though.
|
|
if (textStyle1->NewlineIsSignificant() && HasTerminalNewline(aFrame1))
|
|
return PR_FALSE;
|
|
|
|
if (aFrame1->GetContent() == aFrame2->GetContent() &&
|
|
aFrame1->GetNextInFlow() != aFrame2) {
|
|
// aFrame2 must be a non-fluid continuation of aFrame1. This can happen
|
|
// sometimes when the unicode-bidi property is used; the bidi resolver
|
|
// breaks text into different frames even though the text has the same
|
|
// direction. We can't allow these two frames to share the same textrun
|
|
// because that would violate our invariant that two flows in the same
|
|
// textrun have different content elements.
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsStyleContext* sc2 = aFrame2->GetStyleContext();
|
|
if (sc1 == sc2)
|
|
return PR_TRUE;
|
|
const nsStyleFont* fontStyle1 = sc1->GetStyleFont();
|
|
const nsStyleFont* fontStyle2 = sc2->GetStyleFont();
|
|
const nsStyleText* textStyle2 = sc2->GetStyleText();
|
|
return fontStyle1->mFont.BaseEquals(fontStyle2->mFont) &&
|
|
sc1->GetStyleVisibility()->mLanguage == sc2->GetStyleVisibility()->mLanguage &&
|
|
nsLayoutUtils::GetTextRunFlagsForStyle(sc1, textStyle1, fontStyle1) ==
|
|
nsLayoutUtils::GetTextRunFlagsForStyle(sc2, textStyle2, fontStyle2);
|
|
}
|
|
|
|
void BuildTextRunsScanner::ScanFrame(nsIFrame* aFrame)
|
|
{
|
|
// First check if we can extend the current mapped frame block. This is common.
|
|
if (mMappedFlows.Length() > 0) {
|
|
MappedFlow* mappedFlow = &mMappedFlows[mMappedFlows.Length() - 1];
|
|
if (mappedFlow->mEndFrame == aFrame &&
|
|
(aFrame->GetStateBits() & NS_FRAME_IS_FLUID_CONTINUATION)) {
|
|
NS_ASSERTION(aFrame->GetType() == nsGkAtoms::textFrame,
|
|
"Flow-sibling of a text frame is not a text frame?");
|
|
|
|
// Don't do this optimization if mLastFrame has a terminal newline...
|
|
// it's quite likely preformatted and we might want to end the textrun here.
|
|
// This is almost always true:
|
|
if (mLastFrame->GetStyleContext() == aFrame->GetStyleContext() &&
|
|
!HasTerminalNewline(mLastFrame)) {
|
|
AccumulateRunInfo(static_cast<nsTextFrame*>(aFrame));
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
nsIAtom* frameType = aFrame->GetType();
|
|
// Now see if we can add a new set of frames to the current textrun
|
|
if (frameType == nsGkAtoms::textFrame) {
|
|
nsTextFrame* frame = static_cast<nsTextFrame*>(aFrame);
|
|
|
|
if (mLastFrame) {
|
|
if (!ContinueTextRunAcrossFrames(mLastFrame, frame)) {
|
|
FlushFrames(PR_FALSE, PR_FALSE);
|
|
} else {
|
|
if (mLastFrame->GetContent() == frame->GetContent()) {
|
|
AccumulateRunInfo(frame);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
MappedFlow* mappedFlow = mMappedFlows.AppendElement();
|
|
if (!mappedFlow)
|
|
return;
|
|
|
|
mappedFlow->mStartFrame = frame;
|
|
mappedFlow->mAncestorControllingInitialBreak = mCommonAncestorWithLastFrame;
|
|
|
|
AccumulateRunInfo(frame);
|
|
if (mMappedFlows.Length() == 1) {
|
|
mCurrentFramesAllSameTextRun = frame->GetTextRun();
|
|
mCurrentRunContextInfo = mNextRunContextInfo;
|
|
}
|
|
return;
|
|
}
|
|
|
|
FrameTextTraversal traversal =
|
|
CanTextCrossFrameBoundary(aFrame, frameType);
|
|
PRBool isBR = frameType == nsGkAtoms::brFrame;
|
|
if (!traversal.mLineBreakerCanCrossFrameBoundary) {
|
|
// BR frames are special. We do not need or want to record a break opportunity
|
|
// before a BR frame.
|
|
FlushFrames(PR_TRUE, isBR);
|
|
mCommonAncestorWithLastFrame = aFrame;
|
|
mNextRunContextInfo &= ~nsTextFrameUtils::INCOMING_WHITESPACE;
|
|
mStartOfLine = PR_FALSE;
|
|
} else if (!traversal.mTextRunCanCrossFrameBoundary) {
|
|
FlushFrames(PR_FALSE, PR_FALSE);
|
|
}
|
|
|
|
for (nsIFrame* f = traversal.NextFrameToScan(); f;
|
|
f = traversal.NextFrameToScan()) {
|
|
ScanFrame(f);
|
|
}
|
|
|
|
if (!traversal.mLineBreakerCanCrossFrameBoundary) {
|
|
// Really if we're a BR frame this is unnecessary since descendInto will be
|
|
// false. In fact this whole "if" statement should move into the descendInto.
|
|
FlushFrames(PR_TRUE, isBR);
|
|
mCommonAncestorWithLastFrame = aFrame;
|
|
mNextRunContextInfo &= ~nsTextFrameUtils::INCOMING_WHITESPACE;
|
|
} else if (!traversal.mTextRunCanCrossFrameBoundary) {
|
|
FlushFrames(PR_FALSE, PR_FALSE);
|
|
}
|
|
|
|
LiftCommonAncestorWithLastFrameToParent(aFrame->GetParent());
|
|
}
|
|
|
|
nsTextFrame*
|
|
BuildTextRunsScanner::GetNextBreakBeforeFrame(PRUint32* aIndex)
|
|
{
|
|
PRUint32 index = *aIndex;
|
|
if (index >= mLineBreakBeforeFrames.Length())
|
|
return nsnull;
|
|
*aIndex = index + 1;
|
|
return static_cast<nsTextFrame*>(mLineBreakBeforeFrames.ElementAt(index));
|
|
}
|
|
|
|
static PRUint32
|
|
GetSpacingFlags(nscoord spacing)
|
|
{
|
|
return spacing ? gfxTextRunFactory::TEXT_ENABLE_SPACING : 0;
|
|
}
|
|
|
|
static gfxFontGroup*
|
|
GetFontGroupForFrame(nsIFrame* aFrame,
|
|
nsFontMetrics** aOutFontMetrics = nsnull)
|
|
{
|
|
if (aOutFontMetrics)
|
|
*aOutFontMetrics = nsnull;
|
|
|
|
nsRefPtr<nsFontMetrics> metrics;
|
|
nsLayoutUtils::GetFontMetricsForFrame(aFrame, getter_AddRefs(metrics));
|
|
|
|
if (!metrics)
|
|
return nsnull;
|
|
|
|
if (aOutFontMetrics) {
|
|
*aOutFontMetrics = metrics;
|
|
NS_ADDREF(*aOutFontMetrics);
|
|
}
|
|
// XXX this is a bit bogus, we're releasing 'metrics' so the
|
|
// returned font-group might actually be torn down, although because
|
|
// of the way the device context caches font metrics, this seems to
|
|
// not actually happen. But we should fix this.
|
|
return metrics->GetThebesFontGroup();
|
|
}
|
|
|
|
static already_AddRefed<gfxContext>
|
|
GetReferenceRenderingContext(nsTextFrame* aTextFrame, nsRenderingContext* aRC)
|
|
{
|
|
nsRefPtr<nsRenderingContext> tmp = aRC;
|
|
if (!tmp) {
|
|
tmp = aTextFrame->PresContext()->PresShell()->GetReferenceRenderingContext();
|
|
if (!tmp)
|
|
return nsnull;
|
|
}
|
|
|
|
gfxContext* ctx = tmp->ThebesContext();
|
|
NS_ADDREF(ctx);
|
|
return ctx;
|
|
}
|
|
|
|
/**
|
|
* The returned textrun must be released via gfxTextRunCache::ReleaseTextRun
|
|
* or gfxTextRunCache::AutoTextRun.
|
|
*/
|
|
static gfxTextRun*
|
|
GetHyphenTextRun(gfxTextRun* aTextRun, gfxContext* aContext, nsTextFrame* aTextFrame)
|
|
{
|
|
nsRefPtr<gfxContext> ctx = aContext;
|
|
if (!ctx) {
|
|
ctx = GetReferenceRenderingContext(aTextFrame, nsnull);
|
|
}
|
|
if (!ctx)
|
|
return nsnull;
|
|
|
|
gfxFontGroup* fontGroup = aTextRun->GetFontGroup();
|
|
PRUint32 flags = gfxFontGroup::TEXT_IS_PERSISTENT;
|
|
|
|
// only use U+2010 if it is supported by the first font in the group;
|
|
// it's better to use ASCII '-' from the primary font than to fall back to U+2010
|
|
// from some other, possibly poorly-matching face
|
|
static const PRUnichar unicodeHyphen = 0x2010;
|
|
gfxFont *font = fontGroup->GetFontAt(0);
|
|
if (font && font->HasCharacter(unicodeHyphen)) {
|
|
return gfxTextRunCache::MakeTextRun(&unicodeHyphen, 1, fontGroup, ctx,
|
|
aTextRun->GetAppUnitsPerDevUnit(), flags);
|
|
}
|
|
|
|
static const PRUint8 dash = '-';
|
|
return gfxTextRunCache::MakeTextRun(&dash, 1, fontGroup, ctx,
|
|
aTextRun->GetAppUnitsPerDevUnit(),
|
|
flags);
|
|
}
|
|
|
|
static gfxFont::Metrics
|
|
GetFirstFontMetrics(gfxFontGroup* aFontGroup)
|
|
{
|
|
if (!aFontGroup)
|
|
return gfxFont::Metrics();
|
|
gfxFont* font = aFontGroup->GetFontAt(0);
|
|
if (!font)
|
|
return gfxFont::Metrics();
|
|
return font->GetMetrics();
|
|
}
|
|
|
|
PR_STATIC_ASSERT(NS_STYLE_WHITESPACE_NORMAL == 0);
|
|
PR_STATIC_ASSERT(NS_STYLE_WHITESPACE_PRE == 1);
|
|
PR_STATIC_ASSERT(NS_STYLE_WHITESPACE_NOWRAP == 2);
|
|
PR_STATIC_ASSERT(NS_STYLE_WHITESPACE_PRE_WRAP == 3);
|
|
PR_STATIC_ASSERT(NS_STYLE_WHITESPACE_PRE_LINE == 4);
|
|
|
|
static const nsTextFrameUtils::CompressionMode CSSWhitespaceToCompressionMode[] =
|
|
{
|
|
nsTextFrameUtils::COMPRESS_WHITESPACE_NEWLINE, // normal
|
|
nsTextFrameUtils::COMPRESS_NONE, // pre
|
|
nsTextFrameUtils::COMPRESS_WHITESPACE_NEWLINE, // nowrap
|
|
nsTextFrameUtils::COMPRESS_NONE, // pre-wrap
|
|
nsTextFrameUtils::COMPRESS_WHITESPACE // pre-line
|
|
};
|
|
|
|
gfxTextRun*
|
|
BuildTextRunsScanner::BuildTextRunForFrames(void* aTextBuffer)
|
|
{
|
|
gfxSkipCharsBuilder builder;
|
|
|
|
const void* textPtr = aTextBuffer;
|
|
PRBool anySmallcapsStyle = PR_FALSE;
|
|
PRBool anyTextTransformStyle = PR_FALSE;
|
|
PRInt32 endOfLastContent = 0;
|
|
PRUint32 textFlags = nsTextFrameUtils::TEXT_NO_BREAKS;
|
|
|
|
if (mCurrentRunContextInfo & nsTextFrameUtils::INCOMING_WHITESPACE) {
|
|
textFlags |= nsTextFrameUtils::TEXT_INCOMING_WHITESPACE;
|
|
}
|
|
if (mCurrentRunContextInfo & nsTextFrameUtils::INCOMING_ARABICCHAR) {
|
|
textFlags |= gfxTextRunWordCache::TEXT_INCOMING_ARABICCHAR;
|
|
}
|
|
|
|
nsAutoTArray<PRInt32,50> textBreakPoints;
|
|
TextRunUserData dummyData;
|
|
TextRunMappedFlow dummyMappedFlow;
|
|
|
|
TextRunUserData* userData;
|
|
TextRunUserData* userDataToDestroy;
|
|
// If the situation is particularly simple (and common) we don't need to
|
|
// allocate userData.
|
|
if (mMappedFlows.Length() == 1 && !mMappedFlows[0].mEndFrame &&
|
|
mMappedFlows[0].mStartFrame->GetContentOffset() == 0) {
|
|
userData = &dummyData;
|
|
userDataToDestroy = nsnull;
|
|
dummyData.mMappedFlows = &dummyMappedFlow;
|
|
} else {
|
|
userData = static_cast<TextRunUserData*>
|
|
(nsMemory::Alloc(sizeof(TextRunUserData) + mMappedFlows.Length()*sizeof(TextRunMappedFlow)));
|
|
userDataToDestroy = userData;
|
|
userData->mMappedFlows = reinterpret_cast<TextRunMappedFlow*>(userData + 1);
|
|
}
|
|
userData->mMappedFlowCount = mMappedFlows.Length();
|
|
userData->mLastFlowIndex = 0;
|
|
|
|
PRUint32 currentTransformedTextOffset = 0;
|
|
|
|
PRUint32 nextBreakIndex = 0;
|
|
nsTextFrame* nextBreakBeforeFrame = GetNextBreakBeforeFrame(&nextBreakIndex);
|
|
PRBool enabledJustification = mLineContainer &&
|
|
mLineContainer->GetStyleText()->mTextAlign == NS_STYLE_TEXT_ALIGN_JUSTIFY;
|
|
|
|
PRUint32 i;
|
|
const nsStyleText* textStyle = nsnull;
|
|
const nsStyleFont* fontStyle = nsnull;
|
|
nsStyleContext* lastStyleContext = nsnull;
|
|
for (i = 0; i < mMappedFlows.Length(); ++i) {
|
|
MappedFlow* mappedFlow = &mMappedFlows[i];
|
|
nsTextFrame* f = mappedFlow->mStartFrame;
|
|
|
|
lastStyleContext = f->GetStyleContext();
|
|
// Detect use of text-transform or font-variant anywhere in the run
|
|
textStyle = f->GetStyleText();
|
|
if (NS_STYLE_TEXT_TRANSFORM_NONE != textStyle->mTextTransform) {
|
|
anyTextTransformStyle = PR_TRUE;
|
|
}
|
|
textFlags |= GetSpacingFlags(StyleToCoord(textStyle->mLetterSpacing));
|
|
textFlags |= GetSpacingFlags(textStyle->mWordSpacing);
|
|
nsTextFrameUtils::CompressionMode compression =
|
|
CSSWhitespaceToCompressionMode[textStyle->mWhiteSpace];
|
|
if (enabledJustification && !textStyle->WhiteSpaceIsSignificant()) {
|
|
textFlags |= gfxTextRunFactory::TEXT_ENABLE_SPACING;
|
|
}
|
|
fontStyle = f->GetStyleFont();
|
|
if (NS_STYLE_FONT_VARIANT_SMALL_CAPS == fontStyle->mFont.variant) {
|
|
anySmallcapsStyle = PR_TRUE;
|
|
}
|
|
|
|
// Figure out what content is included in this flow.
|
|
nsIContent* content = f->GetContent();
|
|
const nsTextFragment* frag = content->GetText();
|
|
PRInt32 contentStart = mappedFlow->mStartFrame->GetContentOffset();
|
|
PRInt32 contentEnd = mappedFlow->GetContentEnd();
|
|
PRInt32 contentLength = contentEnd - contentStart;
|
|
|
|
TextRunMappedFlow* newFlow = &userData->mMappedFlows[i];
|
|
newFlow->mStartFrame = mappedFlow->mStartFrame;
|
|
newFlow->mDOMOffsetToBeforeTransformOffset = builder.GetCharCount() -
|
|
mappedFlow->mStartFrame->GetContentOffset();
|
|
newFlow->mContentLength = contentLength;
|
|
|
|
while (nextBreakBeforeFrame && nextBreakBeforeFrame->GetContent() == content) {
|
|
textBreakPoints.AppendElement(
|
|
nextBreakBeforeFrame->GetContentOffset() + newFlow->mDOMOffsetToBeforeTransformOffset);
|
|
nextBreakBeforeFrame = GetNextBreakBeforeFrame(&nextBreakIndex);
|
|
}
|
|
|
|
PRUint32 analysisFlags;
|
|
if (frag->Is2b()) {
|
|
NS_ASSERTION(mDoubleByteText, "Wrong buffer char size!");
|
|
PRUnichar* bufStart = static_cast<PRUnichar*>(aTextBuffer);
|
|
PRUnichar* bufEnd = nsTextFrameUtils::TransformText(
|
|
frag->Get2b() + contentStart, contentLength, bufStart,
|
|
compression, &mNextRunContextInfo, &builder, &analysisFlags);
|
|
aTextBuffer = bufEnd;
|
|
} else {
|
|
if (mDoubleByteText) {
|
|
// Need to expand the text. First transform it into a temporary buffer,
|
|
// then expand.
|
|
nsAutoTArray<PRUint8,BIG_TEXT_NODE_SIZE> tempBuf;
|
|
if (!tempBuf.AppendElements(contentLength)) {
|
|
DestroyUserData(userDataToDestroy);
|
|
return nsnull;
|
|
}
|
|
PRUint8* bufStart = tempBuf.Elements();
|
|
PRUint8* end = nsTextFrameUtils::TransformText(
|
|
reinterpret_cast<const PRUint8*>(frag->Get1b()) + contentStart, contentLength,
|
|
bufStart, compression, &mNextRunContextInfo, &builder, &analysisFlags);
|
|
aTextBuffer = ExpandBuffer(static_cast<PRUnichar*>(aTextBuffer),
|
|
tempBuf.Elements(), end - tempBuf.Elements());
|
|
} else {
|
|
PRUint8* bufStart = static_cast<PRUint8*>(aTextBuffer);
|
|
PRUint8* end = nsTextFrameUtils::TransformText(
|
|
reinterpret_cast<const PRUint8*>(frag->Get1b()) + contentStart, contentLength,
|
|
bufStart, compression, &mNextRunContextInfo, &builder, &analysisFlags);
|
|
aTextBuffer = end;
|
|
}
|
|
}
|
|
textFlags |= analysisFlags;
|
|
|
|
currentTransformedTextOffset =
|
|
(static_cast<const PRUint8*>(aTextBuffer) - static_cast<const PRUint8*>(textPtr)) >> mDoubleByteText;
|
|
|
|
endOfLastContent = contentEnd;
|
|
}
|
|
|
|
// Check for out-of-memory in gfxSkipCharsBuilder
|
|
if (!builder.IsOK()) {
|
|
DestroyUserData(userDataToDestroy);
|
|
return nsnull;
|
|
}
|
|
|
|
void* finalUserData;
|
|
if (userData == &dummyData) {
|
|
textFlags |= nsTextFrameUtils::TEXT_IS_SIMPLE_FLOW;
|
|
userData = nsnull;
|
|
finalUserData = mMappedFlows[0].mStartFrame;
|
|
} else {
|
|
finalUserData = userData;
|
|
}
|
|
|
|
PRUint32 transformedLength = currentTransformedTextOffset;
|
|
|
|
// Now build the textrun
|
|
nsTextFrame* firstFrame = mMappedFlows[0].mStartFrame;
|
|
gfxFontGroup* fontGroup = GetFontGroupForFrame(firstFrame);
|
|
if (!fontGroup) {
|
|
DestroyUserData(userDataToDestroy);
|
|
return nsnull;
|
|
}
|
|
|
|
if (textFlags & nsTextFrameUtils::TEXT_HAS_TAB) {
|
|
textFlags |= gfxTextRunFactory::TEXT_ENABLE_SPACING;
|
|
}
|
|
if (textFlags & nsTextFrameUtils::TEXT_HAS_SHY) {
|
|
textFlags |= gfxTextRunFactory::TEXT_ENABLE_HYPHEN_BREAKS;
|
|
}
|
|
if (mBidiEnabled && (NS_GET_EMBEDDING_LEVEL(firstFrame) & 1)) {
|
|
textFlags |= gfxTextRunFactory::TEXT_IS_RTL;
|
|
}
|
|
if (mNextRunContextInfo & nsTextFrameUtils::INCOMING_WHITESPACE) {
|
|
textFlags |= nsTextFrameUtils::TEXT_TRAILING_WHITESPACE;
|
|
}
|
|
if (mNextRunContextInfo & nsTextFrameUtils::INCOMING_ARABICCHAR) {
|
|
textFlags |= gfxTextRunWordCache::TEXT_TRAILING_ARABICCHAR;
|
|
}
|
|
// ContinueTextRunAcrossFrames guarantees that it doesn't matter which
|
|
// frame's style is used, so use the last frame's
|
|
textFlags |= nsLayoutUtils::GetTextRunFlagsForStyle(lastStyleContext,
|
|
textStyle, fontStyle);
|
|
// XXX this is a bit of a hack. For performance reasons, if we're favouring
|
|
// performance over quality, don't try to get accurate glyph extents.
|
|
if (!(textFlags & gfxTextRunFactory::TEXT_OPTIMIZE_SPEED)) {
|
|
textFlags |= gfxTextRunFactory::TEXT_NEED_BOUNDING_BOX;
|
|
}
|
|
|
|
gfxSkipChars skipChars;
|
|
skipChars.TakeFrom(&builder);
|
|
// Convert linebreak coordinates to transformed string offsets
|
|
NS_ASSERTION(nextBreakIndex == mLineBreakBeforeFrames.Length(),
|
|
"Didn't find all the frames to break-before...");
|
|
gfxSkipCharsIterator iter(skipChars);
|
|
nsAutoTArray<PRUint32,50> textBreakPointsAfterTransform;
|
|
for (i = 0; i < textBreakPoints.Length(); ++i) {
|
|
nsTextFrameUtils::AppendLineBreakOffset(&textBreakPointsAfterTransform,
|
|
iter.ConvertOriginalToSkipped(textBreakPoints[i]));
|
|
}
|
|
if (mStartOfLine) {
|
|
nsTextFrameUtils::AppendLineBreakOffset(&textBreakPointsAfterTransform,
|
|
transformedLength);
|
|
}
|
|
|
|
// Setup factory chain
|
|
nsAutoPtr<nsTransformingTextRunFactory> transformingFactory;
|
|
if (anySmallcapsStyle) {
|
|
transformingFactory = new nsFontVariantTextRunFactory();
|
|
}
|
|
if (anyTextTransformStyle) {
|
|
transformingFactory =
|
|
new nsCaseTransformTextRunFactory(transformingFactory.forget());
|
|
}
|
|
nsTArray<nsStyleContext*> styles;
|
|
if (transformingFactory) {
|
|
iter.SetOriginalOffset(0);
|
|
for (i = 0; i < mMappedFlows.Length(); ++i) {
|
|
MappedFlow* mappedFlow = &mMappedFlows[i];
|
|
nsTextFrame* f;
|
|
for (f = mappedFlow->mStartFrame; f != mappedFlow->mEndFrame;
|
|
f = static_cast<nsTextFrame*>(f->GetNextContinuation())) {
|
|
PRUint32 offset = iter.GetSkippedOffset();
|
|
iter.AdvanceOriginal(f->GetContentLength());
|
|
PRUint32 end = iter.GetSkippedOffset();
|
|
nsStyleContext* sc = f->GetStyleContext();
|
|
PRUint32 j;
|
|
for (j = offset; j < end; ++j) {
|
|
styles.AppendElement(sc);
|
|
}
|
|
}
|
|
}
|
|
textFlags |= nsTextFrameUtils::TEXT_IS_TRANSFORMED;
|
|
NS_ASSERTION(iter.GetSkippedOffset() == transformedLength,
|
|
"We didn't cover all the characters in the text run!");
|
|
}
|
|
|
|
gfxTextRun* textRun;
|
|
gfxTextRunFactory::Parameters params =
|
|
{ mContext, finalUserData, &skipChars,
|
|
textBreakPointsAfterTransform.Elements(), textBreakPointsAfterTransform.Length(),
|
|
firstFrame->PresContext()->AppUnitsPerDevPixel() };
|
|
|
|
if (mDoubleByteText) {
|
|
const PRUnichar* text = static_cast<const PRUnichar*>(textPtr);
|
|
if (transformingFactory) {
|
|
textRun = transformingFactory->MakeTextRun(text, transformedLength, ¶ms,
|
|
fontGroup, textFlags, styles.Elements());
|
|
if (textRun) {
|
|
// ownership of the factory has passed to the textrun
|
|
transformingFactory.forget();
|
|
}
|
|
} else {
|
|
textRun = MakeTextRun(text, transformedLength, fontGroup, ¶ms, textFlags);
|
|
}
|
|
} else {
|
|
const PRUint8* text = static_cast<const PRUint8*>(textPtr);
|
|
textFlags |= gfxFontGroup::TEXT_IS_8BIT;
|
|
if (transformingFactory) {
|
|
textRun = transformingFactory->MakeTextRun(text, transformedLength, ¶ms,
|
|
fontGroup, textFlags, styles.Elements());
|
|
if (textRun) {
|
|
// ownership of the factory has passed to the textrun
|
|
transformingFactory.forget();
|
|
}
|
|
} else {
|
|
textRun = MakeTextRun(text, transformedLength, fontGroup, ¶ms, textFlags);
|
|
}
|
|
}
|
|
if (!textRun) {
|
|
DestroyUserData(userDataToDestroy);
|
|
return nsnull;
|
|
}
|
|
|
|
// We have to set these up after we've created the textrun, because
|
|
// the breaks may be stored in the textrun during this very call.
|
|
// This is a bit annoying because it requires another loop over the frames
|
|
// making up the textrun, but I don't see a way to avoid this.
|
|
SetupBreakSinksForTextRun(textRun, PR_FALSE, mSkipIncompleteTextRuns);
|
|
|
|
if (mSkipIncompleteTextRuns) {
|
|
mSkipIncompleteTextRuns = !TextContainsLineBreakerWhiteSpace(textPtr,
|
|
transformedLength, mDoubleByteText);
|
|
// Arrange for this textrun to be deleted the next time the linebreaker
|
|
// is flushed out
|
|
mTextRunsToDelete.AppendElement(textRun);
|
|
// Since we're doing to destroy the user data now, avoid a dangling
|
|
// pointer. Strictly speaking we don't need to do this since it should
|
|
// not be used (since this textrun will not be used and will be
|
|
// itself deleted soon), but it's always better to not have dangling
|
|
// pointers around.
|
|
textRun->SetUserData(nsnull);
|
|
DestroyUserData(userDataToDestroy);
|
|
return nsnull;
|
|
}
|
|
|
|
// Actually wipe out the textruns associated with the mapped frames and associate
|
|
// those frames with this text run.
|
|
AssignTextRun(textRun);
|
|
return textRun;
|
|
}
|
|
|
|
static PRBool
|
|
HasCompressedLeadingWhitespace(nsTextFrame* aFrame, const nsStyleText* aStyleText,
|
|
PRInt32 aContentEndOffset,
|
|
const gfxSkipCharsIterator& aIterator)
|
|
{
|
|
if (!aIterator.IsOriginalCharSkipped())
|
|
return PR_FALSE;
|
|
|
|
gfxSkipCharsIterator iter = aIterator;
|
|
PRInt32 frameContentOffset = aFrame->GetContentOffset();
|
|
const nsTextFragment* frag = aFrame->GetContent()->GetText();
|
|
while (frameContentOffset < aContentEndOffset && iter.IsOriginalCharSkipped()) {
|
|
if (IsTrimmableSpace(frag, frameContentOffset, aStyleText))
|
|
return PR_TRUE;
|
|
++frameContentOffset;
|
|
iter.AdvanceOriginal(1);
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
void
|
|
BuildTextRunsScanner::SetupBreakSinksForTextRun(gfxTextRun* aTextRun,
|
|
PRBool aIsExistingTextRun,
|
|
PRBool aSuppressSink)
|
|
{
|
|
// textruns have uniform language
|
|
nsIAtom* language = mMappedFlows[0].mStartFrame->GetStyleVisibility()->mLanguage;
|
|
// We keep this pointed at the skip-chars data for the current mappedFlow.
|
|
// This lets us cheaply check whether the flow has compressed initial
|
|
// whitespace...
|
|
gfxSkipCharsIterator iter(aTextRun->GetSkipChars());
|
|
|
|
PRUint32 i;
|
|
for (i = 0; i < mMappedFlows.Length(); ++i) {
|
|
MappedFlow* mappedFlow = &mMappedFlows[i];
|
|
PRUint32 offset = iter.GetSkippedOffset();
|
|
gfxSkipCharsIterator iterNext = iter;
|
|
iterNext.AdvanceOriginal(mappedFlow->GetContentEnd() -
|
|
mappedFlow->mStartFrame->GetContentOffset());
|
|
|
|
nsAutoPtr<BreakSink>* breakSink = mBreakSinks.AppendElement(
|
|
new BreakSink(aTextRun, mContext, offset, aIsExistingTextRun));
|
|
if (!breakSink || !*breakSink)
|
|
return;
|
|
|
|
PRUint32 length = iterNext.GetSkippedOffset() - offset;
|
|
PRUint32 flags = 0;
|
|
nsIFrame* initialBreakController = mappedFlow->mAncestorControllingInitialBreak;
|
|
if (!initialBreakController) {
|
|
initialBreakController = mLineContainer;
|
|
}
|
|
if (!initialBreakController->GetStyleText()->WhiteSpaceCanWrap()) {
|
|
flags |= nsLineBreaker::BREAK_SUPPRESS_INITIAL;
|
|
}
|
|
nsTextFrame* startFrame = mappedFlow->mStartFrame;
|
|
const nsStyleText* textStyle = startFrame->GetStyleText();
|
|
if (!textStyle->WhiteSpaceCanWrap()) {
|
|
flags |= nsLineBreaker::BREAK_SUPPRESS_INSIDE;
|
|
}
|
|
if (aTextRun->GetFlags() & nsTextFrameUtils::TEXT_NO_BREAKS) {
|
|
flags |= nsLineBreaker::BREAK_SKIP_SETTING_NO_BREAKS;
|
|
}
|
|
if (textStyle->mTextTransform == NS_STYLE_TEXT_TRANSFORM_CAPITALIZE) {
|
|
flags |= nsLineBreaker::BREAK_NEED_CAPITALIZATION;
|
|
}
|
|
if (textStyle->mHyphens == NS_STYLE_HYPHENS_AUTO) {
|
|
flags |= nsLineBreaker::BREAK_USE_AUTO_HYPHENATION;
|
|
}
|
|
|
|
if (HasCompressedLeadingWhitespace(startFrame, textStyle,
|
|
mappedFlow->GetContentEnd(), iter)) {
|
|
mLineBreaker.AppendInvisibleWhitespace(flags);
|
|
}
|
|
|
|
if (length > 0) {
|
|
BreakSink* sink = aSuppressSink ? nsnull : (*breakSink).get();
|
|
if (aTextRun->GetFlags() & gfxFontGroup::TEXT_IS_8BIT) {
|
|
mLineBreaker.AppendText(language, aTextRun->GetText8Bit() + offset,
|
|
length, flags, sink);
|
|
} else {
|
|
mLineBreaker.AppendText(language, aTextRun->GetTextUnicode() + offset,
|
|
length, flags, sink);
|
|
}
|
|
}
|
|
|
|
iter = iterNext;
|
|
}
|
|
}
|
|
|
|
// Find the flow corresponding to aContent in aUserData
|
|
static inline TextRunMappedFlow*
|
|
FindFlowForContent(TextRunUserData* aUserData, nsIContent* aContent)
|
|
{
|
|
// Find the flow that contains us
|
|
PRInt32 i = aUserData->mLastFlowIndex;
|
|
PRInt32 delta = 1;
|
|
PRInt32 sign = 1;
|
|
// Search starting at the current position and examine close-by
|
|
// positions first, moving further and further away as we go.
|
|
while (i >= 0 && PRUint32(i) < aUserData->mMappedFlowCount) {
|
|
TextRunMappedFlow* flow = &aUserData->mMappedFlows[i];
|
|
if (flow->mStartFrame->GetContent() == aContent) {
|
|
return flow;
|
|
}
|
|
|
|
i += delta;
|
|
sign = -sign;
|
|
delta = -delta + sign;
|
|
}
|
|
|
|
// We ran into an array edge. Add |delta| to |i| once more to get
|
|
// back to the side where we still need to search, then step in
|
|
// the |sign| direction.
|
|
i += delta;
|
|
if (sign > 0) {
|
|
for (; i < PRInt32(aUserData->mMappedFlowCount); ++i) {
|
|
TextRunMappedFlow* flow = &aUserData->mMappedFlows[i];
|
|
if (flow->mStartFrame->GetContent() == aContent) {
|
|
return flow;
|
|
}
|
|
}
|
|
} else {
|
|
for (; i >= 0; --i) {
|
|
TextRunMappedFlow* flow = &aUserData->mMappedFlows[i];
|
|
if (flow->mStartFrame->GetContent() == aContent) {
|
|
return flow;
|
|
}
|
|
}
|
|
}
|
|
|
|
return nsnull;
|
|
}
|
|
|
|
void
|
|
BuildTextRunsScanner::AssignTextRun(gfxTextRun* aTextRun)
|
|
{
|
|
PRUint32 i;
|
|
for (i = 0; i < mMappedFlows.Length(); ++i) {
|
|
MappedFlow* mappedFlow = &mMappedFlows[i];
|
|
nsTextFrame* startFrame = mappedFlow->mStartFrame;
|
|
nsTextFrame* endFrame = mappedFlow->mEndFrame;
|
|
nsTextFrame* f;
|
|
for (f = startFrame; f != endFrame;
|
|
f = static_cast<nsTextFrame*>(f->GetNextContinuation())) {
|
|
#ifdef DEBUG_roc
|
|
if (f->GetTextRun()) {
|
|
gfxTextRun* textRun = f->GetTextRun();
|
|
if (textRun->GetFlags() & nsTextFrameUtils::TEXT_IS_SIMPLE_FLOW) {
|
|
if (mMappedFlows[0].mStartFrame != static_cast<nsTextFrame*>(textRun->GetUserData())) {
|
|
NS_WARNING("REASSIGNING SIMPLE FLOW TEXT RUN!");
|
|
}
|
|
} else {
|
|
TextRunUserData* userData =
|
|
static_cast<TextRunUserData*>(textRun->GetUserData());
|
|
|
|
if (userData->mMappedFlowCount >= mMappedFlows.Length() ||
|
|
userData->mMappedFlows[userData->mMappedFlowCount - 1].mStartFrame !=
|
|
mMappedFlows[userData->mMappedFlowCount - 1].mStartFrame) {
|
|
NS_WARNING("REASSIGNING MULTIFLOW TEXT RUN (not append)!");
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
gfxTextRun* oldTextRun = f->GetTextRun();
|
|
if (oldTextRun) {
|
|
nsTextFrame* firstFrame = nsnull;
|
|
PRUint32 startOffset = 0;
|
|
if (oldTextRun->GetFlags() & nsTextFrameUtils::TEXT_IS_SIMPLE_FLOW) {
|
|
firstFrame = static_cast<nsTextFrame*>(oldTextRun->GetUserData());
|
|
}
|
|
else {
|
|
TextRunUserData* userData = static_cast<TextRunUserData*>(oldTextRun->GetUserData());
|
|
firstFrame = userData->mMappedFlows[0].mStartFrame;
|
|
if (NS_UNLIKELY(f != firstFrame)) {
|
|
TextRunMappedFlow* flow = FindFlowForContent(userData, f->GetContent());
|
|
if (flow) {
|
|
startOffset = flow->mDOMOffsetToBeforeTransformOffset;
|
|
}
|
|
else {
|
|
NS_ERROR("Can't find flow containing frame 'f'");
|
|
}
|
|
}
|
|
}
|
|
|
|
// Optimization: if |f| is the first frame in the flow then there are no
|
|
// prev-continuations that use |oldTextRun|.
|
|
nsTextFrame* clearFrom = nsnull;
|
|
if (NS_UNLIKELY(f != firstFrame)) {
|
|
// If all the frames in the mapped flow starting at |f| (inclusive)
|
|
// are empty then we let the prev-continuations keep the old text run.
|
|
gfxSkipCharsIterator iter(oldTextRun->GetSkipChars(), startOffset, f->GetContentOffset());
|
|
PRUint32 textRunOffset = iter.ConvertOriginalToSkipped(f->GetContentOffset());
|
|
clearFrom = textRunOffset == oldTextRun->GetLength() ? f : nsnull;
|
|
}
|
|
f->ClearTextRun(clearFrom);
|
|
|
|
#ifdef DEBUG
|
|
if (firstFrame && !firstFrame->GetTextRun()) {
|
|
// oldTextRun was destroyed - assert that we don't reference it.
|
|
for (PRUint32 i = 0; i < mBreakSinks.Length(); ++i) {
|
|
NS_ASSERTION(oldTextRun != mBreakSinks[i]->mTextRun,
|
|
"destroyed text run is still in use");
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
f->SetTextRun(aTextRun);
|
|
}
|
|
// Set this bit now; we can't set it any earlier because
|
|
// f->ClearTextRun() might clear it out.
|
|
startFrame->AddStateBits(TEXT_IN_TEXTRUN_USER_DATA);
|
|
}
|
|
}
|
|
|
|
gfxSkipCharsIterator
|
|
nsTextFrame::EnsureTextRun(gfxContext* aReferenceContext, nsIFrame* aLineContainer,
|
|
const nsLineList::iterator* aLine,
|
|
PRUint32* aFlowEndInTextRun)
|
|
{
|
|
if (mTextRun && (!aLine || !(*aLine)->GetInvalidateTextRuns())) {
|
|
if (mTextRun->GetExpirationState()->IsTracked()) {
|
|
gTextRuns->MarkUsed(mTextRun);
|
|
}
|
|
} else {
|
|
nsRefPtr<gfxContext> ctx = aReferenceContext;
|
|
if (!ctx) {
|
|
ctx = GetReferenceRenderingContext(this, nsnull);
|
|
}
|
|
if (ctx) {
|
|
BuildTextRuns(ctx, this, aLineContainer, aLine);
|
|
}
|
|
if (!mTextRun) {
|
|
// A text run was not constructed for this frame. This is bad. The caller
|
|
// will check mTextRun.
|
|
static const gfxSkipChars emptySkipChars;
|
|
return gfxSkipCharsIterator(emptySkipChars, 0);
|
|
}
|
|
}
|
|
|
|
if (mTextRun->GetFlags() & nsTextFrameUtils::TEXT_IS_SIMPLE_FLOW) {
|
|
if (aFlowEndInTextRun) {
|
|
*aFlowEndInTextRun = mTextRun->GetLength();
|
|
}
|
|
return gfxSkipCharsIterator(mTextRun->GetSkipChars(), 0, mContentOffset);
|
|
}
|
|
|
|
TextRunUserData* userData = static_cast<TextRunUserData*>(mTextRun->GetUserData());
|
|
TextRunMappedFlow* flow = FindFlowForContent(userData, mContent);
|
|
if (flow) {
|
|
// Since textruns can only contain one flow for a given content element,
|
|
// this must be our flow.
|
|
PRUint32 flowIndex = flow - userData->mMappedFlows;
|
|
userData->mLastFlowIndex = flowIndex;
|
|
gfxSkipCharsIterator iter(mTextRun->GetSkipChars(),
|
|
flow->mDOMOffsetToBeforeTransformOffset, mContentOffset);
|
|
if (aFlowEndInTextRun) {
|
|
if (flowIndex + 1 < userData->mMappedFlowCount) {
|
|
gfxSkipCharsIterator end(mTextRun->GetSkipChars());
|
|
*aFlowEndInTextRun = end.ConvertOriginalToSkipped(
|
|
flow[1].mStartFrame->GetContentOffset() + flow[1].mDOMOffsetToBeforeTransformOffset);
|
|
} else {
|
|
*aFlowEndInTextRun = mTextRun->GetLength();
|
|
}
|
|
}
|
|
return iter;
|
|
}
|
|
|
|
NS_ERROR("Can't find flow containing this frame???");
|
|
static const gfxSkipChars emptySkipChars;
|
|
return gfxSkipCharsIterator(emptySkipChars, 0);
|
|
}
|
|
|
|
static PRUint32
|
|
GetEndOfTrimmedText(const nsTextFragment* aFrag, const nsStyleText* aStyleText,
|
|
PRUint32 aStart, PRUint32 aEnd,
|
|
gfxSkipCharsIterator* aIterator)
|
|
{
|
|
aIterator->SetSkippedOffset(aEnd);
|
|
while (aIterator->GetSkippedOffset() > aStart) {
|
|
aIterator->AdvanceSkipped(-1);
|
|
if (!IsTrimmableSpace(aFrag, aIterator->GetOriginalOffset(), aStyleText))
|
|
return aIterator->GetSkippedOffset() + 1;
|
|
}
|
|
return aStart;
|
|
}
|
|
|
|
nsTextFrame::TrimmedOffsets
|
|
nsTextFrame::GetTrimmedOffsets(const nsTextFragment* aFrag,
|
|
PRBool aTrimAfter)
|
|
{
|
|
NS_ASSERTION(mTextRun, "Need textrun here");
|
|
// This should not be used during reflow. We need our TEXT_REFLOW_FLAGS
|
|
// to be set correctly.
|
|
NS_ASSERTION(!(GetStateBits() & NS_FRAME_FIRST_REFLOW),
|
|
"Can only call this on frames that have been reflowed");
|
|
NS_ASSERTION(!(GetStateBits() & NS_FRAME_IN_REFLOW),
|
|
"Can only call this on frames that are not being reflowed");
|
|
|
|
TrimmedOffsets offsets = { GetContentOffset(), GetContentLength() };
|
|
const nsStyleText* textStyle = GetStyleText();
|
|
// Note that pre-line newlines should still allow us to trim spaces
|
|
// for display
|
|
if (textStyle->WhiteSpaceIsSignificant())
|
|
return offsets;
|
|
|
|
if (GetStateBits() & TEXT_START_OF_LINE) {
|
|
PRInt32 whitespaceCount =
|
|
GetTrimmableWhitespaceCount(aFrag,
|
|
offsets.mStart, offsets.mLength, 1);
|
|
offsets.mStart += whitespaceCount;
|
|
offsets.mLength -= whitespaceCount;
|
|
}
|
|
|
|
if (aTrimAfter && (GetStateBits() & TEXT_END_OF_LINE)) {
|
|
// This treats a trailing 'pre-line' newline as trimmable. That's fine,
|
|
// it's actually what we want since we want whitespace before it to
|
|
// be trimmed.
|
|
PRInt32 whitespaceCount =
|
|
GetTrimmableWhitespaceCount(aFrag,
|
|
offsets.GetEnd() - 1, offsets.mLength, -1);
|
|
offsets.mLength -= whitespaceCount;
|
|
}
|
|
return offsets;
|
|
}
|
|
|
|
/*
|
|
* Currently only Unicode characters below 0x10000 have their spacing modified
|
|
* by justification. If characters above 0x10000 turn out to need
|
|
* justification spacing, that will require extra work. Currently,
|
|
* this function must not include 0xd800 to 0xdbff because these characters
|
|
* are surrogates.
|
|
*/
|
|
static PRBool IsJustifiableCharacter(const nsTextFragment* aFrag, PRInt32 aPos,
|
|
PRBool aLangIsCJ)
|
|
{
|
|
PRUnichar ch = aFrag->CharAt(aPos);
|
|
if (ch == '\n' || ch == '\t' || ch == '\r')
|
|
return PR_TRUE;
|
|
if (ch == ' ' || ch == CH_NBSP) {
|
|
// Don't justify spaces that are combined with diacriticals
|
|
if (!aFrag->Is2b())
|
|
return PR_TRUE;
|
|
return !nsTextFrameUtils::IsSpaceCombiningSequenceTail(
|
|
aFrag->Get2b() + aPos + 1, aFrag->GetLength() - (aPos + 1));
|
|
}
|
|
if (ch < 0x2150u)
|
|
return PR_FALSE;
|
|
if (aLangIsCJ && (
|
|
(0x2150u <= ch && ch <= 0x22ffu) || // Number Forms, Arrows, Mathematical Operators
|
|
(0x2460u <= ch && ch <= 0x24ffu) || // Enclosed Alphanumerics
|
|
(0x2580u <= ch && ch <= 0x27bfu) || // Block Elements, Geometric Shapes, Miscellaneous Symbols, Dingbats
|
|
(0x27f0u <= ch && ch <= 0x2bffu) || // Supplemental Arrows-A, Braille Patterns, Supplemental Arrows-B,
|
|
// Miscellaneous Mathematical Symbols-B, Supplemental Mathematical Operators,
|
|
// Miscellaneous Symbols and Arrows
|
|
(0x2e80u <= ch && ch <= 0x312fu) || // CJK Radicals Supplement, CJK Radicals Supplement,
|
|
// Ideographic Description Characters, CJK Symbols and Punctuation,
|
|
// Hiragana, Katakana, Bopomofo
|
|
(0x3190u <= ch && ch <= 0xabffu) || // Kanbun, Bopomofo Extended, Katakana Phonetic Extensions,
|
|
// Enclosed CJK Letters and Months, CJK Compatibility,
|
|
// CJK Unified Ideographs Extension A, Yijing Hexagram Symbols,
|
|
// CJK Unified Ideographs, Yi Syllables, Yi Radicals
|
|
(0xf900u <= ch && ch <= 0xfaffu) || // CJK Compatibility Ideographs
|
|
(0xff5eu <= ch && ch <= 0xff9fu) // Halfwidth and Fullwidth Forms(a part)
|
|
))
|
|
return PR_TRUE;
|
|
return PR_FALSE;
|
|
}
|
|
|
|
void
|
|
nsTextFrame::ClearMetrics(nsHTMLReflowMetrics& aMetrics)
|
|
{
|
|
aMetrics.width = 0;
|
|
aMetrics.height = 0;
|
|
aMetrics.ascent = 0;
|
|
mAscent = 0;
|
|
}
|
|
|
|
static PRInt32 FindChar(const nsTextFragment* frag,
|
|
PRInt32 aOffset, PRInt32 aLength, PRUnichar ch)
|
|
{
|
|
PRInt32 i = 0;
|
|
if (frag->Is2b()) {
|
|
const PRUnichar* str = frag->Get2b() + aOffset;
|
|
for (; i < aLength; ++i) {
|
|
if (*str == ch)
|
|
return i + aOffset;
|
|
++str;
|
|
}
|
|
} else {
|
|
if (PRUint16(ch) <= 0xFF) {
|
|
const char* str = frag->Get1b() + aOffset;
|
|
const void* p = memchr(str, ch, aLength);
|
|
if (p)
|
|
return (static_cast<const char*>(p) - str) + aOffset;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static PRBool IsChineseOrJapanese(nsIFrame* aFrame)
|
|
{
|
|
nsIAtom* language = aFrame->GetStyleVisibility()->mLanguage;
|
|
if (!language) {
|
|
return PR_FALSE;
|
|
}
|
|
const PRUnichar *lang = language->GetUTF16String();
|
|
return (!nsCRT::strncmp(lang, NS_LITERAL_STRING("ja").get(), 2) ||
|
|
!nsCRT::strncmp(lang, NS_LITERAL_STRING("zh").get(), 2)) &&
|
|
(language->GetLength() == 2 || lang[2] == '-');
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static PRBool IsInBounds(const gfxSkipCharsIterator& aStart, PRInt32 aContentLength,
|
|
PRUint32 aOffset, PRUint32 aLength) {
|
|
if (aStart.GetSkippedOffset() > aOffset)
|
|
return PR_FALSE;
|
|
if (aContentLength == PR_INT32_MAX)
|
|
return PR_TRUE;
|
|
gfxSkipCharsIterator iter(aStart);
|
|
iter.AdvanceOriginal(aContentLength);
|
|
return iter.GetSkippedOffset() >= aOffset + aLength;
|
|
}
|
|
#endif
|
|
|
|
class NS_STACK_CLASS PropertyProvider : public gfxTextRun::PropertyProvider {
|
|
public:
|
|
/**
|
|
* Use this constructor for reflow, when we don't know what text is
|
|
* really mapped by the frame and we have a lot of other data around.
|
|
*
|
|
* @param aLength can be PR_INT32_MAX to indicate we cover all the text
|
|
* associated with aFrame up to where its flow chain ends in the given
|
|
* textrun. If PR_INT32_MAX is passed, justification and hyphen-related methods
|
|
* cannot be called, nor can GetOriginalLength().
|
|
*/
|
|
PropertyProvider(gfxTextRun* aTextRun, const nsStyleText* aTextStyle,
|
|
const nsTextFragment* aFrag, nsTextFrame* aFrame,
|
|
const gfxSkipCharsIterator& aStart, PRInt32 aLength,
|
|
nsIFrame* aLineContainer,
|
|
nscoord aOffsetFromBlockOriginForTabs)
|
|
: mTextRun(aTextRun), mFontGroup(nsnull),
|
|
mTextStyle(aTextStyle), mFrag(aFrag),
|
|
mLineContainer(aLineContainer),
|
|
mFrame(aFrame), mStart(aStart), mTempIterator(aStart),
|
|
mTabWidths(nsnull), mTabWidthsAnalyzedLimit(0),
|
|
mLength(aLength),
|
|
mWordSpacing(mTextStyle->mWordSpacing),
|
|
mLetterSpacing(StyleToCoord(mTextStyle->mLetterSpacing)),
|
|
mJustificationSpacing(0),
|
|
mHyphenWidth(-1),
|
|
mOffsetFromBlockOriginForTabs(aOffsetFromBlockOriginForTabs),
|
|
mReflowing(PR_TRUE)
|
|
{
|
|
NS_ASSERTION(mStart.IsInitialized(), "Start not initialized?");
|
|
}
|
|
|
|
/**
|
|
* Use this constructor after the frame has been reflowed and we don't
|
|
* have other data around. Gets everything from the frame. EnsureTextRun
|
|
* *must* be called before this!!!
|
|
*/
|
|
PropertyProvider(nsTextFrame* aFrame, const gfxSkipCharsIterator& aStart)
|
|
: mTextRun(aFrame->GetTextRun()), mFontGroup(nsnull),
|
|
mTextStyle(aFrame->GetStyleText()),
|
|
mFrag(aFrame->GetContent()->GetText()),
|
|
mLineContainer(nsnull),
|
|
mFrame(aFrame), mStart(aStart), mTempIterator(aStart),
|
|
mTabWidths(nsnull), mTabWidthsAnalyzedLimit(0),
|
|
mLength(aFrame->GetContentLength()),
|
|
mWordSpacing(mTextStyle->mWordSpacing),
|
|
mLetterSpacing(StyleToCoord(mTextStyle->mLetterSpacing)),
|
|
mJustificationSpacing(0),
|
|
mHyphenWidth(-1),
|
|
mOffsetFromBlockOriginForTabs(0),
|
|
mReflowing(PR_FALSE)
|
|
{
|
|
NS_ASSERTION(mTextRun, "Textrun not initialized!");
|
|
}
|
|
|
|
// Call this after construction if you're not going to reflow the text
|
|
void InitializeForDisplay(PRBool aTrimAfter);
|
|
|
|
virtual void GetSpacing(PRUint32 aStart, PRUint32 aLength, Spacing* aSpacing);
|
|
virtual gfxFloat GetHyphenWidth();
|
|
virtual void GetHyphenationBreaks(PRUint32 aStart, PRUint32 aLength,
|
|
PRPackedBool* aBreakBefore);
|
|
virtual PRInt8 GetHyphensOption() {
|
|
return mTextStyle->mHyphens;
|
|
}
|
|
|
|
void GetSpacingInternal(PRUint32 aStart, PRUint32 aLength, Spacing* aSpacing,
|
|
PRBool aIgnoreTabs);
|
|
|
|
/**
|
|
* Count the number of justifiable characters in the given DOM range
|
|
*/
|
|
PRUint32 ComputeJustifiableCharacters(PRInt32 aOffset, PRInt32 aLength);
|
|
/**
|
|
* Find the start and end of the justifiable characters. Does not depend on the
|
|
* position of aStart or aEnd, although it's most efficient if they are near the
|
|
* start and end of the text frame.
|
|
*/
|
|
void FindJustificationRange(gfxSkipCharsIterator* aStart,
|
|
gfxSkipCharsIterator* aEnd);
|
|
|
|
const nsStyleText* GetStyleText() { return mTextStyle; }
|
|
nsTextFrame* GetFrame() { return mFrame; }
|
|
// This may not be equal to the frame offset/length in because we may have
|
|
// adjusted for whitespace trimming according to the state bits set in the frame
|
|
// (for the static provider)
|
|
const gfxSkipCharsIterator& GetStart() { return mStart; }
|
|
// May return PR_INT32_MAX if that was given to the constructor
|
|
PRUint32 GetOriginalLength() {
|
|
NS_ASSERTION(mLength != PR_INT32_MAX, "Length not known");
|
|
return mLength;
|
|
}
|
|
const nsTextFragment* GetFragment() { return mFrag; }
|
|
|
|
gfxFontGroup* GetFontGroup() {
|
|
if (!mFontGroup)
|
|
InitFontGroupAndFontMetrics();
|
|
return mFontGroup;
|
|
}
|
|
|
|
nsFontMetrics* GetFontMetrics() {
|
|
if (!mFontMetrics)
|
|
InitFontGroupAndFontMetrics();
|
|
return mFontMetrics;
|
|
}
|
|
|
|
void CalcTabWidths(PRUint32 aTransformedStart, PRUint32 aTransformedLength);
|
|
|
|
const gfxSkipCharsIterator& GetEndHint() { return mTempIterator; }
|
|
|
|
protected:
|
|
void SetupJustificationSpacing();
|
|
|
|
void InitFontGroupAndFontMetrics() {
|
|
mFontGroup = GetFontGroupForFrame(mFrame, getter_AddRefs(mFontMetrics));
|
|
}
|
|
|
|
gfxTextRun* mTextRun;
|
|
gfxFontGroup* mFontGroup;
|
|
nsRefPtr<nsFontMetrics> mFontMetrics;
|
|
const nsStyleText* mTextStyle;
|
|
const nsTextFragment* mFrag;
|
|
nsIFrame* mLineContainer;
|
|
nsTextFrame* mFrame;
|
|
gfxSkipCharsIterator mStart; // Offset in original and transformed string
|
|
gfxSkipCharsIterator mTempIterator;
|
|
|
|
// Either null, or pointing to the frame's tabWidthProperty.
|
|
TabWidthStore* mTabWidths;
|
|
// how far we've done tab-width calculation; this is ONLY valid
|
|
// when mTabWidths is NULL (otherwise rely on mTabWidths->mLimit instead)
|
|
PRUint32 mTabWidthsAnalyzedLimit;
|
|
|
|
PRInt32 mLength; // DOM string length, may be PR_INT32_MAX
|
|
gfxFloat mWordSpacing; // space for each whitespace char
|
|
gfxFloat mLetterSpacing; // space for each letter
|
|
gfxFloat mJustificationSpacing;
|
|
gfxFloat mHyphenWidth;
|
|
gfxFloat mOffsetFromBlockOriginForTabs;
|
|
PRPackedBool mReflowing;
|
|
};
|
|
|
|
PRUint32
|
|
PropertyProvider::ComputeJustifiableCharacters(PRInt32 aOffset, PRInt32 aLength)
|
|
{
|
|
// Scan non-skipped characters and count justifiable chars.
|
|
nsSkipCharsRunIterator
|
|
run(mStart, nsSkipCharsRunIterator::LENGTH_INCLUDES_SKIPPED, aLength);
|
|
run.SetOriginalOffset(aOffset);
|
|
PRUint32 justifiableChars = 0;
|
|
PRBool isCJK = IsChineseOrJapanese(mFrame);
|
|
while (run.NextRun()) {
|
|
PRInt32 i;
|
|
for (i = 0; i < run.GetRunLength(); ++i) {
|
|
justifiableChars +=
|
|
IsJustifiableCharacter(mFrag, run.GetOriginalOffset() + i, isCJK);
|
|
}
|
|
}
|
|
return justifiableChars;
|
|
}
|
|
|
|
/**
|
|
* Finds the offset of the first character of the cluster containing aPos
|
|
*/
|
|
static void FindClusterStart(gfxTextRun* aTextRun, PRInt32 aOriginalStart,
|
|
gfxSkipCharsIterator* aPos)
|
|
{
|
|
while (aPos->GetOriginalOffset() > aOriginalStart) {
|
|
if (aPos->IsOriginalCharSkipped() ||
|
|
aTextRun->IsClusterStart(aPos->GetSkippedOffset())) {
|
|
break;
|
|
}
|
|
aPos->AdvanceOriginal(-1);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Finds the offset of the last character of the cluster containing aPos
|
|
*/
|
|
static void FindClusterEnd(gfxTextRun* aTextRun, PRInt32 aOriginalEnd,
|
|
gfxSkipCharsIterator* aPos)
|
|
{
|
|
NS_PRECONDITION(aPos->GetOriginalOffset() < aOriginalEnd,
|
|
"character outside string");
|
|
aPos->AdvanceOriginal(1);
|
|
while (aPos->GetOriginalOffset() < aOriginalEnd) {
|
|
if (aPos->IsOriginalCharSkipped() ||
|
|
aTextRun->IsClusterStart(aPos->GetSkippedOffset())) {
|
|
break;
|
|
}
|
|
aPos->AdvanceOriginal(1);
|
|
}
|
|
aPos->AdvanceOriginal(-1);
|
|
}
|
|
|
|
// aStart, aLength in transformed string offsets
|
|
void
|
|
PropertyProvider::GetSpacing(PRUint32 aStart, PRUint32 aLength,
|
|
Spacing* aSpacing)
|
|
{
|
|
GetSpacingInternal(aStart, aLength, aSpacing,
|
|
(mTextRun->GetFlags() & nsTextFrameUtils::TEXT_HAS_TAB) == 0);
|
|
}
|
|
|
|
static PRBool
|
|
CanAddSpacingAfter(gfxTextRun* aTextRun, PRUint32 aOffset)
|
|
{
|
|
if (aOffset + 1 >= aTextRun->GetLength())
|
|
return PR_TRUE;
|
|
return aTextRun->IsClusterStart(aOffset + 1) &&
|
|
aTextRun->IsLigatureGroupStart(aOffset + 1);
|
|
}
|
|
|
|
void
|
|
PropertyProvider::GetSpacingInternal(PRUint32 aStart, PRUint32 aLength,
|
|
Spacing* aSpacing, PRBool aIgnoreTabs)
|
|
{
|
|
NS_PRECONDITION(IsInBounds(mStart, mLength, aStart, aLength), "Range out of bounds");
|
|
|
|
PRUint32 index;
|
|
for (index = 0; index < aLength; ++index) {
|
|
aSpacing[index].mBefore = 0.0;
|
|
aSpacing[index].mAfter = 0.0;
|
|
}
|
|
|
|
// Find our offset into the original+transformed string
|
|
gfxSkipCharsIterator start(mStart);
|
|
start.SetSkippedOffset(aStart);
|
|
|
|
// First, compute the word and letter spacing
|
|
if (mWordSpacing || mLetterSpacing) {
|
|
// Iterate over non-skipped characters
|
|
nsSkipCharsRunIterator
|
|
run(start, nsSkipCharsRunIterator::LENGTH_UNSKIPPED_ONLY, aLength);
|
|
while (run.NextRun()) {
|
|
PRUint32 runOffsetInSubstring = run.GetSkippedOffset() - aStart;
|
|
PRInt32 i;
|
|
gfxSkipCharsIterator iter = run.GetPos();
|
|
for (i = 0; i < run.GetRunLength(); ++i) {
|
|
if (CanAddSpacingAfter(mTextRun, run.GetSkippedOffset() + i)) {
|
|
// End of a cluster, not in a ligature: put letter-spacing after it
|
|
aSpacing[runOffsetInSubstring + i].mAfter += mLetterSpacing;
|
|
}
|
|
if (IsCSSWordSpacingSpace(mFrag, i + run.GetOriginalOffset(),
|
|
mTextStyle)) {
|
|
// It kinda sucks, but space characters can be part of clusters,
|
|
// and even still be whitespace (I think!)
|
|
iter.SetSkippedOffset(run.GetSkippedOffset() + i);
|
|
FindClusterEnd(mTextRun, run.GetOriginalOffset() + run.GetRunLength(),
|
|
&iter);
|
|
aSpacing[iter.GetSkippedOffset() - aStart].mAfter += mWordSpacing;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Ignore tab spacing rather than computing it, if the tab size is 0
|
|
if (!aIgnoreTabs)
|
|
aIgnoreTabs = mFrame->GetStyleText()->mTabSize == 0;
|
|
|
|
// Now add tab spacing, if there is any
|
|
if (!aIgnoreTabs) {
|
|
CalcTabWidths(aStart, aLength);
|
|
if (mTabWidths) {
|
|
mTabWidths->ApplySpacing(aSpacing,
|
|
aStart - mStart.GetSkippedOffset(), aLength);
|
|
}
|
|
}
|
|
|
|
// Now add in justification spacing
|
|
if (mJustificationSpacing) {
|
|
gfxFloat halfJustificationSpace = mJustificationSpacing/2;
|
|
// Scan non-skipped characters and adjust justifiable chars, adding
|
|
// justification space on either side of the cluster
|
|
PRBool isCJK = IsChineseOrJapanese(mFrame);
|
|
gfxSkipCharsIterator justificationStart(mStart), justificationEnd(mStart);
|
|
FindJustificationRange(&justificationStart, &justificationEnd);
|
|
|
|
nsSkipCharsRunIterator
|
|
run(start, nsSkipCharsRunIterator::LENGTH_UNSKIPPED_ONLY, aLength);
|
|
while (run.NextRun()) {
|
|
PRInt32 i;
|
|
gfxSkipCharsIterator iter = run.GetPos();
|
|
PRInt32 runOriginalOffset = run.GetOriginalOffset();
|
|
for (i = 0; i < run.GetRunLength(); ++i) {
|
|
PRInt32 iterOriginalOffset = runOriginalOffset + i;
|
|
if (IsJustifiableCharacter(mFrag, iterOriginalOffset, isCJK)) {
|
|
iter.SetOriginalOffset(iterOriginalOffset);
|
|
FindClusterStart(mTextRun, runOriginalOffset, &iter);
|
|
PRUint32 clusterFirstChar = iter.GetSkippedOffset();
|
|
FindClusterEnd(mTextRun, runOriginalOffset + run.GetRunLength(), &iter);
|
|
PRUint32 clusterLastChar = iter.GetSkippedOffset();
|
|
// Only apply justification to characters before justificationEnd
|
|
if (clusterFirstChar >= justificationStart.GetSkippedOffset() &&
|
|
clusterLastChar < justificationEnd.GetSkippedOffset()) {
|
|
aSpacing[clusterFirstChar - aStart].mBefore += halfJustificationSpace;
|
|
aSpacing[clusterLastChar - aStart].mAfter += halfJustificationSpace;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static gfxFloat
|
|
ComputeTabWidthAppUnits(nsIFrame* aFrame, gfxTextRun* aTextRun)
|
|
{
|
|
// Get the number of spaces from CSS -moz-tab-size
|
|
const nsStyleText* textStyle = aFrame->GetStyleText();
|
|
|
|
// Round the space width when converting to appunits the same way
|
|
// textruns do
|
|
gfxFloat spaceWidthAppUnits =
|
|
NS_roundf(GetFirstFontMetrics(
|
|
GetFontGroupForFrame(aFrame)).spaceWidth *
|
|
aTextRun->GetAppUnitsPerDevUnit());
|
|
return textStyle->mTabSize * spaceWidthAppUnits;
|
|
}
|
|
|
|
// aX and the result are in whole appunits.
|
|
static gfxFloat
|
|
AdvanceToNextTab(gfxFloat aX, nsIFrame* aFrame,
|
|
gfxTextRun* aTextRun, gfxFloat* aCachedTabWidth)
|
|
{
|
|
if (*aCachedTabWidth < 0) {
|
|
*aCachedTabWidth = ComputeTabWidthAppUnits(aFrame, aTextRun);
|
|
}
|
|
|
|
// Advance aX to the next multiple of *aCachedTabWidth. We must advance
|
|
// by at least 1 appunit.
|
|
// XXX should we make this 1 CSS pixel?
|
|
return NS_ceil((aX + 1)/(*aCachedTabWidth))*(*aCachedTabWidth);
|
|
}
|
|
|
|
void
|
|
PropertyProvider::CalcTabWidths(PRUint32 aStart, PRUint32 aLength)
|
|
{
|
|
if (!mTabWidths) {
|
|
if (mReflowing && !mLineContainer) {
|
|
// Intrinsic width computation does its own tab processing. We
|
|
// just don't do anything here.
|
|
return;
|
|
}
|
|
if (!mReflowing) {
|
|
mTabWidths = static_cast<TabWidthStore*>
|
|
(mFrame->Properties().Get(TabWidthProperty()));
|
|
#ifdef DEBUG
|
|
// If we're not reflowing, we should have already computed the
|
|
// tab widths; check that they're available as far as the last
|
|
// tab character present (if any)
|
|
for (PRUint32 i = aStart + aLength; i > aStart; --i) {
|
|
if (mTextRun->GetChar(i - 1) == '\t') {
|
|
NS_ASSERTION(mTabWidths && mTabWidths->mLimit >= i,
|
|
"Precomputed tab widths are missing!");
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
return;
|
|
}
|
|
}
|
|
|
|
PRUint32 startOffset = mStart.GetSkippedOffset();
|
|
PRUint32 tabsEnd = mTabWidths ?
|
|
mTabWidths->mLimit : PR_MAX(mTabWidthsAnalyzedLimit, startOffset);
|
|
|
|
if (tabsEnd < aStart + aLength) {
|
|
NS_ASSERTION(mReflowing,
|
|
"We need precomputed tab widths, but don't have enough.");
|
|
|
|
gfxFloat tabWidth = -1;
|
|
for (PRUint32 i = tabsEnd; i < aStart + aLength; ++i) {
|
|
Spacing spacing;
|
|
GetSpacingInternal(i, 1, &spacing, PR_TRUE);
|
|
mOffsetFromBlockOriginForTabs += spacing.mBefore;
|
|
|
|
if (mTextRun->GetChar(i) != '\t') {
|
|
if (mTextRun->IsClusterStart(i)) {
|
|
PRUint32 clusterEnd = i + 1;
|
|
while (clusterEnd < mTextRun->GetLength() &&
|
|
!mTextRun->IsClusterStart(clusterEnd)) {
|
|
++clusterEnd;
|
|
}
|
|
mOffsetFromBlockOriginForTabs +=
|
|
mTextRun->GetAdvanceWidth(i, clusterEnd - i, nsnull);
|
|
}
|
|
} else {
|
|
if (!mTabWidths) {
|
|
mTabWidths = new TabWidthStore();
|
|
mFrame->Properties().Set(TabWidthProperty(), mTabWidths);
|
|
}
|
|
double nextTab = AdvanceToNextTab(mOffsetFromBlockOriginForTabs,
|
|
mFrame, mTextRun, &tabWidth);
|
|
mTabWidths->mWidths.AppendElement(
|
|
TabWidth(i - startOffset, nextTab - mOffsetFromBlockOriginForTabs));
|
|
mOffsetFromBlockOriginForTabs = nextTab;
|
|
}
|
|
|
|
mOffsetFromBlockOriginForTabs += spacing.mAfter;
|
|
}
|
|
|
|
if (mTabWidths) {
|
|
mTabWidths->mLimit = aStart + aLength;
|
|
}
|
|
}
|
|
|
|
if (!mTabWidths) {
|
|
// Delete any stale property that may be left on the frame
|
|
mFrame->Properties().Delete(TabWidthProperty());
|
|
mTabWidthsAnalyzedLimit = PR_MAX(mTabWidthsAnalyzedLimit,
|
|
aStart + aLength);
|
|
}
|
|
}
|
|
|
|
gfxFloat
|
|
PropertyProvider::GetHyphenWidth()
|
|
{
|
|
if (mHyphenWidth < 0) {
|
|
gfxTextRunCache::AutoTextRun hyphenTextRun(GetHyphenTextRun(mTextRun, nsnull, mFrame));
|
|
mHyphenWidth = mLetterSpacing;
|
|
if (hyphenTextRun.get()) {
|
|
mHyphenWidth += hyphenTextRun->GetAdvanceWidth(0, hyphenTextRun->GetLength(), nsnull);
|
|
}
|
|
}
|
|
return mHyphenWidth;
|
|
}
|
|
|
|
void
|
|
PropertyProvider::GetHyphenationBreaks(PRUint32 aStart, PRUint32 aLength,
|
|
PRPackedBool* aBreakBefore)
|
|
{
|
|
NS_PRECONDITION(IsInBounds(mStart, mLength, aStart, aLength), "Range out of bounds");
|
|
NS_PRECONDITION(mLength != PR_INT32_MAX, "Can't call this with undefined length");
|
|
|
|
if (!mTextStyle->WhiteSpaceCanWrap() ||
|
|
mTextStyle->mHyphens == NS_STYLE_HYPHENS_NONE)
|
|
{
|
|
memset(aBreakBefore, PR_FALSE, aLength);
|
|
return;
|
|
}
|
|
|
|
// Iterate through the original-string character runs
|
|
nsSkipCharsRunIterator
|
|
run(mStart, nsSkipCharsRunIterator::LENGTH_UNSKIPPED_ONLY, aLength);
|
|
run.SetSkippedOffset(aStart);
|
|
// We need to visit skipped characters so that we can detect SHY
|
|
run.SetVisitSkipped();
|
|
|
|
PRInt32 prevTrailingCharOffset = run.GetPos().GetOriginalOffset() - 1;
|
|
PRBool allowHyphenBreakBeforeNextChar =
|
|
prevTrailingCharOffset >= mStart.GetOriginalOffset() &&
|
|
prevTrailingCharOffset < mStart.GetOriginalOffset() + mLength &&
|
|
mFrag->CharAt(prevTrailingCharOffset) == CH_SHY;
|
|
|
|
while (run.NextRun()) {
|
|
NS_ASSERTION(run.GetRunLength() > 0, "Shouldn't return zero-length runs");
|
|
if (run.IsSkipped()) {
|
|
// Check if there's a soft hyphen which would let us hyphenate before
|
|
// the next non-skipped character. Don't look at soft hyphens followed
|
|
// by other skipped characters, we won't use them.
|
|
allowHyphenBreakBeforeNextChar =
|
|
mFrag->CharAt(run.GetOriginalOffset() + run.GetRunLength() - 1) == CH_SHY;
|
|
} else {
|
|
PRInt32 runOffsetInSubstring = run.GetSkippedOffset() - aStart;
|
|
memset(aBreakBefore + runOffsetInSubstring, PR_FALSE, run.GetRunLength());
|
|
// Don't allow hyphen breaks at the start of the line
|
|
aBreakBefore[runOffsetInSubstring] = allowHyphenBreakBeforeNextChar &&
|
|
(!(mFrame->GetStateBits() & TEXT_START_OF_LINE) ||
|
|
run.GetSkippedOffset() > mStart.GetSkippedOffset());
|
|
allowHyphenBreakBeforeNextChar = PR_FALSE;
|
|
}
|
|
}
|
|
|
|
if (mTextStyle->mHyphens == NS_STYLE_HYPHENS_AUTO) {
|
|
for (PRUint32 i = 0; i < aLength; ++i) {
|
|
if (mTextRun->CanHyphenateBefore(aStart + i)) {
|
|
aBreakBefore[i] = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
PropertyProvider::InitializeForDisplay(PRBool aTrimAfter)
|
|
{
|
|
nsTextFrame::TrimmedOffsets trimmed =
|
|
mFrame->GetTrimmedOffsets(mFrag, aTrimAfter);
|
|
mStart.SetOriginalOffset(trimmed.mStart);
|
|
mLength = trimmed.mLength;
|
|
SetupJustificationSpacing();
|
|
}
|
|
|
|
static PRUint32 GetSkippedDistance(const gfxSkipCharsIterator& aStart,
|
|
const gfxSkipCharsIterator& aEnd)
|
|
{
|
|
return aEnd.GetSkippedOffset() - aStart.GetSkippedOffset();
|
|
}
|
|
|
|
void
|
|
PropertyProvider::FindJustificationRange(gfxSkipCharsIterator* aStart,
|
|
gfxSkipCharsIterator* aEnd)
|
|
{
|
|
NS_PRECONDITION(mLength != PR_INT32_MAX, "Can't call this with undefined length");
|
|
NS_ASSERTION(aStart && aEnd, "aStart or/and aEnd is null");
|
|
|
|
aStart->SetOriginalOffset(mStart.GetOriginalOffset());
|
|
aEnd->SetOriginalOffset(mStart.GetOriginalOffset() + mLength);
|
|
|
|
// Ignore first cluster at start of line for justification purposes
|
|
if (mFrame->GetStateBits() & TEXT_START_OF_LINE) {
|
|
while (aStart->GetOriginalOffset() < aEnd->GetOriginalOffset()) {
|
|
aStart->AdvanceOriginal(1);
|
|
if (!aStart->IsOriginalCharSkipped() &&
|
|
mTextRun->IsClusterStart(aStart->GetSkippedOffset()))
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Ignore trailing cluster at end of line for justification purposes
|
|
if (mFrame->GetStateBits() & TEXT_END_OF_LINE) {
|
|
while (aEnd->GetOriginalOffset() > aStart->GetOriginalOffset()) {
|
|
aEnd->AdvanceOriginal(-1);
|
|
if (!aEnd->IsOriginalCharSkipped() &&
|
|
mTextRun->IsClusterStart(aEnd->GetSkippedOffset()))
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
PropertyProvider::SetupJustificationSpacing()
|
|
{
|
|
NS_PRECONDITION(mLength != PR_INT32_MAX, "Can't call this with undefined length");
|
|
|
|
if (!(mFrame->GetStateBits() & TEXT_JUSTIFICATION_ENABLED))
|
|
return;
|
|
|
|
gfxSkipCharsIterator start(mStart), end(mStart);
|
|
// We can't just use our mLength here; when InitializeForDisplay is
|
|
// called with PR_FALSE for aTrimAfter, we still shouldn't be assigning
|
|
// justification space to any trailing whitespace.
|
|
nsTextFrame::TrimmedOffsets trimmed =
|
|
mFrame->GetTrimmedOffsets(mFrag, PR_TRUE);
|
|
end.AdvanceOriginal(trimmed.mLength);
|
|
gfxSkipCharsIterator realEnd(end);
|
|
FindJustificationRange(&start, &end);
|
|
|
|
PRInt32 justifiableCharacters =
|
|
ComputeJustifiableCharacters(start.GetOriginalOffset(),
|
|
end.GetOriginalOffset() - start.GetOriginalOffset());
|
|
if (justifiableCharacters == 0) {
|
|
// Nothing to do, nothing is justifiable and we shouldn't have any
|
|
// justification space assigned
|
|
return;
|
|
}
|
|
|
|
gfxFloat naturalWidth =
|
|
mTextRun->GetAdvanceWidth(mStart.GetSkippedOffset(),
|
|
GetSkippedDistance(mStart, realEnd), this);
|
|
if (mFrame->GetStateBits() & TEXT_HYPHEN_BREAK) {
|
|
gfxTextRunCache::AutoTextRun hyphenTextRun(GetHyphenTextRun(mTextRun, nsnull, mFrame));
|
|
if (hyphenTextRun.get()) {
|
|
naturalWidth +=
|
|
hyphenTextRun->GetAdvanceWidth(0, hyphenTextRun->GetLength(), nsnull);
|
|
}
|
|
}
|
|
gfxFloat totalJustificationSpace = mFrame->GetSize().width - naturalWidth;
|
|
if (totalJustificationSpace <= 0) {
|
|
// No space available
|
|
return;
|
|
}
|
|
|
|
mJustificationSpacing = totalJustificationSpace/justifiableCharacters;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
// Helper class for managing blinking text
|
|
|
|
class nsBlinkTimer : public nsITimerCallback
|
|
{
|
|
public:
|
|
nsBlinkTimer();
|
|
virtual ~nsBlinkTimer();
|
|
|
|
NS_DECL_ISUPPORTS
|
|
|
|
void AddFrame(nsPresContext* aPresContext, nsIFrame* aFrame);
|
|
|
|
PRBool RemoveFrame(nsIFrame* aFrame);
|
|
|
|
PRInt32 FrameCount();
|
|
|
|
void Start();
|
|
|
|
void Stop();
|
|
|
|
NS_DECL_NSITIMERCALLBACK
|
|
|
|
static nsresult AddBlinkFrame(nsPresContext* aPresContext, nsIFrame* aFrame);
|
|
static nsresult RemoveBlinkFrame(nsIFrame* aFrame);
|
|
|
|
static PRBool GetBlinkIsOff() { return sState == 3; }
|
|
|
|
protected:
|
|
|
|
struct FrameData {
|
|
nsPresContext* mPresContext; // pres context associated with the frame
|
|
nsIFrame* mFrame;
|
|
|
|
|
|
FrameData(nsPresContext* aPresContext,
|
|
nsIFrame* aFrame)
|
|
: mPresContext(aPresContext), mFrame(aFrame) {}
|
|
};
|
|
|
|
class FrameDataComparator {
|
|
public:
|
|
PRBool Equals(const FrameData& aTimer, nsIFrame* const& aFrame) const {
|
|
return aTimer.mFrame == aFrame;
|
|
}
|
|
};
|
|
|
|
nsCOMPtr<nsITimer> mTimer;
|
|
nsTArray<FrameData> mFrames;
|
|
nsPresContext* mPresContext;
|
|
|
|
protected:
|
|
|
|
static nsBlinkTimer* sTextBlinker;
|
|
static PRUint32 sState; // 0-2 == on; 3 == off
|
|
|
|
};
|
|
|
|
nsBlinkTimer* nsBlinkTimer::sTextBlinker = nsnull;
|
|
PRUint32 nsBlinkTimer::sState = 0;
|
|
|
|
#ifdef NOISY_BLINK
|
|
static PRTime gLastTick;
|
|
#endif
|
|
|
|
nsBlinkTimer::nsBlinkTimer()
|
|
{
|
|
}
|
|
|
|
nsBlinkTimer::~nsBlinkTimer()
|
|
{
|
|
Stop();
|
|
sTextBlinker = nsnull;
|
|
}
|
|
|
|
void nsBlinkTimer::Start()
|
|
{
|
|
nsresult rv;
|
|
mTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
|
|
if (NS_OK == rv) {
|
|
mTimer->InitWithCallback(this, 250, nsITimer::TYPE_REPEATING_PRECISE_CAN_SKIP);
|
|
}
|
|
}
|
|
|
|
void nsBlinkTimer::Stop()
|
|
{
|
|
if (nsnull != mTimer) {
|
|
mTimer->Cancel();
|
|
mTimer = nsnull;
|
|
}
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS1(nsBlinkTimer, nsITimerCallback)
|
|
|
|
void nsBlinkTimer::AddFrame(nsPresContext* aPresContext, nsIFrame* aFrame) {
|
|
mFrames.AppendElement(FrameData(aPresContext, aFrame));
|
|
if (1 == mFrames.Length()) {
|
|
Start();
|
|
}
|
|
}
|
|
|
|
PRBool nsBlinkTimer::RemoveFrame(nsIFrame* aFrame) {
|
|
mFrames.RemoveElement(aFrame, FrameDataComparator());
|
|
|
|
if (mFrames.IsEmpty()) {
|
|
Stop();
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRInt32 nsBlinkTimer::FrameCount() {
|
|
return PRInt32(mFrames.Length());
|
|
}
|
|
|
|
NS_IMETHODIMP nsBlinkTimer::Notify(nsITimer *timer)
|
|
{
|
|
// Toggle blink state bit so that text code knows whether or not to
|
|
// render. All text code shares the same flag so that they all blink
|
|
// in unison.
|
|
sState = (sState + 1) % 4;
|
|
if (sState == 1 || sState == 2)
|
|
// States 0, 1, and 2 are all the same.
|
|
return NS_OK;
|
|
|
|
#ifdef NOISY_BLINK
|
|
PRTime now = PR_Now();
|
|
char buf[50];
|
|
PRTime delta;
|
|
LL_SUB(delta, now, gLastTick);
|
|
gLastTick = now;
|
|
PR_snprintf(buf, sizeof(buf), "%lldusec", delta);
|
|
printf("%s\n", buf);
|
|
#endif
|
|
|
|
PRUint32 i, n = mFrames.Length();
|
|
for (i = 0; i < n; i++) {
|
|
FrameData& frameData = mFrames.ElementAt(i);
|
|
|
|
// Determine damaged area and tell view manager to redraw it
|
|
// blink doesn't blink outline ... I hope
|
|
nsRect bounds(nsPoint(0, 0), frameData.mFrame->GetSize());
|
|
frameData.mFrame->Invalidate(bounds);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
// static
|
|
nsresult nsBlinkTimer::AddBlinkFrame(nsPresContext* aPresContext, nsIFrame* aFrame)
|
|
{
|
|
if (!sTextBlinker)
|
|
{
|
|
sTextBlinker = new nsBlinkTimer;
|
|
if (!sTextBlinker) return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
NS_ADDREF(sTextBlinker);
|
|
|
|
sTextBlinker->AddFrame(aPresContext, aFrame);
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
// static
|
|
nsresult nsBlinkTimer::RemoveBlinkFrame(nsIFrame* aFrame)
|
|
{
|
|
NS_ASSERTION(sTextBlinker, "Should have blink timer here");
|
|
|
|
nsBlinkTimer* blinkTimer = sTextBlinker; // copy so we can call NS_RELEASE on it
|
|
if (!blinkTimer) return NS_OK;
|
|
|
|
blinkTimer->RemoveFrame(aFrame);
|
|
NS_RELEASE(blinkTimer);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
static nscolor
|
|
EnsureDifferentColors(nscolor colorA, nscolor colorB)
|
|
{
|
|
if (colorA == colorB) {
|
|
nscolor res;
|
|
res = NS_RGB(NS_GET_R(colorA) ^ 0xff,
|
|
NS_GET_G(colorA) ^ 0xff,
|
|
NS_GET_B(colorA) ^ 0xff);
|
|
return res;
|
|
}
|
|
return colorA;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
static nscolor
|
|
DarkenColor(nscolor aColor)
|
|
{
|
|
PRUint16 hue, sat, value;
|
|
PRUint8 alpha;
|
|
|
|
// convert the RBG to HSV so we can get the lightness (which is the v)
|
|
NS_RGB2HSV(aColor, hue, sat, value, alpha);
|
|
|
|
// The goal here is to send white to black while letting colored
|
|
// stuff stay colored... So we adopt the following approach.
|
|
// Something with sat = 0 should end up with value = 0. Something
|
|
// with a high sat can end up with a high value and it's ok.... At
|
|
// the same time, we don't want to make things lighter. Do
|
|
// something simple, since it seems to work.
|
|
if (value > sat) {
|
|
value = sat;
|
|
// convert this color back into the RGB color space.
|
|
NS_HSV2RGB(aColor, hue, sat, value, alpha);
|
|
}
|
|
return aColor;
|
|
}
|
|
|
|
// Check whether we should darken text colors. We need to do this if
|
|
// background images and colors are being suppressed, because that means
|
|
// light text will not be visible against the (presumed light-colored) background.
|
|
static PRBool
|
|
ShouldDarkenColors(nsPresContext* aPresContext)
|
|
{
|
|
return !aPresContext->GetBackgroundColorDraw() &&
|
|
!aPresContext->GetBackgroundImageDraw();
|
|
}
|
|
|
|
nsTextPaintStyle::nsTextPaintStyle(nsTextFrame* aFrame)
|
|
: mFrame(aFrame),
|
|
mPresContext(aFrame->PresContext()),
|
|
mInitCommonColors(PR_FALSE),
|
|
mInitSelectionColors(PR_FALSE)
|
|
{
|
|
for (PRUint32 i = 0; i < NS_ARRAY_LENGTH(mSelectionStyle); i++)
|
|
mSelectionStyle[i].mInit = PR_FALSE;
|
|
}
|
|
|
|
PRBool
|
|
nsTextPaintStyle::EnsureSufficientContrast(nscolor *aForeColor, nscolor *aBackColor)
|
|
{
|
|
InitCommonColors();
|
|
|
|
// If the combination of selection background color and frame background color
|
|
// is sufficient contrast, don't exchange the selection colors.
|
|
PRInt32 backLuminosityDifference =
|
|
NS_LUMINOSITY_DIFFERENCE(*aBackColor, mFrameBackgroundColor);
|
|
if (backLuminosityDifference >= mSufficientContrast)
|
|
return PR_FALSE;
|
|
|
|
// Otherwise, we should use the higher-contrast color for the selection
|
|
// background color.
|
|
PRInt32 foreLuminosityDifference =
|
|
NS_LUMINOSITY_DIFFERENCE(*aForeColor, mFrameBackgroundColor);
|
|
if (backLuminosityDifference < foreLuminosityDifference) {
|
|
nscolor tmpColor = *aForeColor;
|
|
*aForeColor = *aBackColor;
|
|
*aBackColor = tmpColor;
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nscolor
|
|
nsTextPaintStyle::GetTextColor()
|
|
{
|
|
nscolor color = mFrame->GetVisitedDependentColor(eCSSProperty_color);
|
|
if (ShouldDarkenColors(mPresContext)) {
|
|
color = DarkenColor(color);
|
|
}
|
|
return color;
|
|
}
|
|
|
|
PRBool
|
|
nsTextPaintStyle::GetSelectionColors(nscolor* aForeColor,
|
|
nscolor* aBackColor)
|
|
{
|
|
NS_ASSERTION(aForeColor, "aForeColor is null");
|
|
NS_ASSERTION(aBackColor, "aBackColor is null");
|
|
|
|
if (!InitSelectionColors())
|
|
return PR_FALSE;
|
|
|
|
*aForeColor = mSelectionTextColor;
|
|
*aBackColor = mSelectionBGColor;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
void
|
|
nsTextPaintStyle::GetHighlightColors(nscolor* aForeColor,
|
|
nscolor* aBackColor)
|
|
{
|
|
NS_ASSERTION(aForeColor, "aForeColor is null");
|
|
NS_ASSERTION(aBackColor, "aBackColor is null");
|
|
|
|
nsILookAndFeel* look = mPresContext->LookAndFeel();
|
|
nscolor foreColor, backColor;
|
|
look->GetColor(nsILookAndFeel::eColor_TextHighlightBackground,
|
|
backColor);
|
|
look->GetColor(nsILookAndFeel::eColor_TextHighlightForeground,
|
|
foreColor);
|
|
EnsureSufficientContrast(&foreColor, &backColor);
|
|
*aForeColor = foreColor;
|
|
*aBackColor = backColor;
|
|
}
|
|
|
|
void
|
|
nsTextPaintStyle::GetURLSecondaryColor(nscolor* aForeColor)
|
|
{
|
|
NS_ASSERTION(aForeColor, "aForeColor is null");
|
|
|
|
nscolor textColor = GetTextColor();
|
|
textColor = NS_RGBA(NS_GET_R(textColor),
|
|
NS_GET_G(textColor),
|
|
NS_GET_B(textColor),
|
|
(PRUint8)(255 * 0.5f));
|
|
// Don't use true alpha color for readability.
|
|
InitCommonColors();
|
|
*aForeColor = NS_ComposeColors(mFrameBackgroundColor, textColor);
|
|
}
|
|
|
|
void
|
|
nsTextPaintStyle::GetIMESelectionColors(PRInt32 aIndex,
|
|
nscolor* aForeColor,
|
|
nscolor* aBackColor)
|
|
{
|
|
NS_ASSERTION(aForeColor, "aForeColor is null");
|
|
NS_ASSERTION(aBackColor, "aBackColor is null");
|
|
NS_ASSERTION(aIndex >= 0 && aIndex < 5, "Index out of range");
|
|
|
|
nsSelectionStyle* selectionStyle = GetSelectionStyle(aIndex);
|
|
*aForeColor = selectionStyle->mTextColor;
|
|
*aBackColor = selectionStyle->mBGColor;
|
|
}
|
|
|
|
PRBool
|
|
nsTextPaintStyle::GetSelectionUnderlineForPaint(PRInt32 aIndex,
|
|
nscolor* aLineColor,
|
|
float* aRelativeSize,
|
|
PRUint8* aStyle)
|
|
{
|
|
NS_ASSERTION(aLineColor, "aLineColor is null");
|
|
NS_ASSERTION(aRelativeSize, "aRelativeSize is null");
|
|
NS_ASSERTION(aIndex >= 0 && aIndex < 5, "Index out of range");
|
|
|
|
nsSelectionStyle* selectionStyle = GetSelectionStyle(aIndex);
|
|
if (selectionStyle->mUnderlineStyle == NS_STYLE_BORDER_STYLE_NONE ||
|
|
selectionStyle->mUnderlineColor == NS_TRANSPARENT ||
|
|
selectionStyle->mUnderlineRelativeSize <= 0.0f)
|
|
return PR_FALSE;
|
|
|
|
*aLineColor = selectionStyle->mUnderlineColor;
|
|
*aRelativeSize = selectionStyle->mUnderlineRelativeSize;
|
|
*aStyle = selectionStyle->mUnderlineStyle;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
void
|
|
nsTextPaintStyle::InitCommonColors()
|
|
{
|
|
if (mInitCommonColors)
|
|
return;
|
|
|
|
nsIFrame* bgFrame =
|
|
nsCSSRendering::FindNonTransparentBackgroundFrame(mFrame);
|
|
NS_ASSERTION(bgFrame, "Cannot find NonTransparentBackgroundFrame.");
|
|
nscolor bgColor =
|
|
bgFrame->GetVisitedDependentColor(eCSSProperty_background_color);
|
|
|
|
nscolor defaultBgColor = mPresContext->DefaultBackgroundColor();
|
|
mFrameBackgroundColor = NS_ComposeColors(defaultBgColor, bgColor);
|
|
|
|
if (bgFrame->IsThemed()) {
|
|
// Assume a native widget has sufficient contrast always
|
|
mSufficientContrast = 0;
|
|
mInitCommonColors = PR_TRUE;
|
|
return;
|
|
}
|
|
|
|
NS_ASSERTION(NS_GET_A(defaultBgColor) == 255,
|
|
"default background color is not opaque");
|
|
|
|
nsILookAndFeel* look = mPresContext->LookAndFeel();
|
|
nscolor defaultWindowBackgroundColor, selectionTextColor, selectionBGColor;
|
|
look->GetColor(nsILookAndFeel::eColor_TextSelectBackground,
|
|
selectionBGColor);
|
|
look->GetColor(nsILookAndFeel::eColor_TextSelectForeground,
|
|
selectionTextColor);
|
|
look->GetColor(nsILookAndFeel::eColor_WindowBackground,
|
|
defaultWindowBackgroundColor);
|
|
|
|
mSufficientContrast =
|
|
NS_MIN(NS_MIN(NS_SUFFICIENT_LUMINOSITY_DIFFERENCE,
|
|
NS_LUMINOSITY_DIFFERENCE(selectionTextColor,
|
|
selectionBGColor)),
|
|
NS_LUMINOSITY_DIFFERENCE(defaultWindowBackgroundColor,
|
|
selectionBGColor));
|
|
|
|
mInitCommonColors = PR_TRUE;
|
|
}
|
|
|
|
static Element*
|
|
FindElementAncestorForMozSelection(nsIContent* aContent)
|
|
{
|
|
NS_ENSURE_TRUE(aContent, nsnull);
|
|
while (aContent && aContent->IsInNativeAnonymousSubtree()) {
|
|
aContent = aContent->GetBindingParent();
|
|
}
|
|
NS_ASSERTION(aContent, "aContent isn't in non-anonymous tree?");
|
|
while (aContent && !aContent->IsElement()) {
|
|
aContent = aContent->GetParent();
|
|
}
|
|
return aContent ? aContent->AsElement() : nsnull;
|
|
}
|
|
|
|
PRBool
|
|
nsTextPaintStyle::InitSelectionColors()
|
|
{
|
|
if (mInitSelectionColors)
|
|
return PR_TRUE;
|
|
|
|
PRInt16 selectionFlags;
|
|
PRInt16 selectionStatus = mFrame->GetSelectionStatus(&selectionFlags);
|
|
if (!(selectionFlags & nsISelectionDisplay::DISPLAY_TEXT) ||
|
|
selectionStatus < nsISelectionController::SELECTION_ON) {
|
|
// Not displaying the normal selection.
|
|
// We're not caching this fact, so every call to GetSelectionColors
|
|
// will come through here. We could avoid this, but it's not really worth it.
|
|
return PR_FALSE;
|
|
}
|
|
|
|
mInitSelectionColors = PR_TRUE;
|
|
|
|
nsIFrame* nonGeneratedAncestor = nsLayoutUtils::GetNonGeneratedAncestor(mFrame);
|
|
Element* selectionElement =
|
|
FindElementAncestorForMozSelection(nonGeneratedAncestor->GetContent());
|
|
|
|
if (selectionElement &&
|
|
selectionStatus == nsISelectionController::SELECTION_ON) {
|
|
nsRefPtr<nsStyleContext> sc = nsnull;
|
|
sc = mPresContext->StyleSet()->
|
|
ProbePseudoElementStyle(selectionElement,
|
|
nsCSSPseudoElements::ePseudo_mozSelection,
|
|
mFrame->GetStyleContext());
|
|
// Use -moz-selection pseudo class.
|
|
if (sc) {
|
|
mSelectionBGColor =
|
|
sc->GetVisitedDependentColor(eCSSProperty_background_color);
|
|
mSelectionTextColor = sc->GetVisitedDependentColor(eCSSProperty_color);
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
|
|
nsILookAndFeel* look = mPresContext->LookAndFeel();
|
|
|
|
nscolor selectionBGColor;
|
|
look->GetColor(nsILookAndFeel::eColor_TextSelectBackground,
|
|
selectionBGColor);
|
|
|
|
if (selectionStatus == nsISelectionController::SELECTION_ATTENTION) {
|
|
look->GetColor(nsILookAndFeel::eColor_TextSelectBackgroundAttention,
|
|
mSelectionBGColor);
|
|
mSelectionBGColor = EnsureDifferentColors(mSelectionBGColor,
|
|
selectionBGColor);
|
|
} else if (selectionStatus != nsISelectionController::SELECTION_ON) {
|
|
look->GetColor(nsILookAndFeel::eColor_TextSelectBackgroundDisabled,
|
|
mSelectionBGColor);
|
|
mSelectionBGColor = EnsureDifferentColors(mSelectionBGColor,
|
|
selectionBGColor);
|
|
} else {
|
|
mSelectionBGColor = selectionBGColor;
|
|
}
|
|
|
|
look->GetColor(nsILookAndFeel::eColor_TextSelectForeground,
|
|
mSelectionTextColor);
|
|
|
|
// On MacOS X, we don't exchange text color and BG color.
|
|
if (mSelectionTextColor == NS_DONT_CHANGE_COLOR) {
|
|
nscoord frameColor = mFrame->GetVisitedDependentColor(eCSSProperty_color);
|
|
mSelectionTextColor = EnsureDifferentColors(frameColor, mSelectionBGColor);
|
|
} else {
|
|
EnsureSufficientContrast(&mSelectionTextColor, &mSelectionBGColor);
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
nsTextPaintStyle::nsSelectionStyle*
|
|
nsTextPaintStyle::GetSelectionStyle(PRInt32 aIndex)
|
|
{
|
|
InitSelectionStyle(aIndex);
|
|
return &mSelectionStyle[aIndex];
|
|
}
|
|
|
|
struct StyleIDs {
|
|
nsILookAndFeel::nsColorID mForeground, mBackground, mLine;
|
|
nsILookAndFeel::nsMetricID mLineStyle;
|
|
nsILookAndFeel::nsMetricFloatID mLineRelativeSize;
|
|
};
|
|
static StyleIDs SelectionStyleIDs[] = {
|
|
{ nsILookAndFeel::eColor_IMERawInputForeground,
|
|
nsILookAndFeel::eColor_IMERawInputBackground,
|
|
nsILookAndFeel::eColor_IMERawInputUnderline,
|
|
nsILookAndFeel::eMetric_IMERawInputUnderlineStyle,
|
|
nsILookAndFeel::eMetricFloat_IMEUnderlineRelativeSize },
|
|
{ nsILookAndFeel::eColor_IMESelectedRawTextForeground,
|
|
nsILookAndFeel::eColor_IMESelectedRawTextBackground,
|
|
nsILookAndFeel::eColor_IMESelectedRawTextUnderline,
|
|
nsILookAndFeel::eMetric_IMESelectedRawTextUnderlineStyle,
|
|
nsILookAndFeel::eMetricFloat_IMEUnderlineRelativeSize },
|
|
{ nsILookAndFeel::eColor_IMEConvertedTextForeground,
|
|
nsILookAndFeel::eColor_IMEConvertedTextBackground,
|
|
nsILookAndFeel::eColor_IMEConvertedTextUnderline,
|
|
nsILookAndFeel::eMetric_IMEConvertedTextUnderlineStyle,
|
|
nsILookAndFeel::eMetricFloat_IMEUnderlineRelativeSize },
|
|
{ nsILookAndFeel::eColor_IMESelectedConvertedTextForeground,
|
|
nsILookAndFeel::eColor_IMESelectedConvertedTextBackground,
|
|
nsILookAndFeel::eColor_IMESelectedConvertedTextUnderline,
|
|
nsILookAndFeel::eMetric_IMESelectedConvertedTextUnderline,
|
|
nsILookAndFeel::eMetricFloat_IMEUnderlineRelativeSize },
|
|
{ nsILookAndFeel::eColor_LAST_COLOR,
|
|
nsILookAndFeel::eColor_LAST_COLOR,
|
|
nsILookAndFeel::eColor_SpellCheckerUnderline,
|
|
nsILookAndFeel::eMetric_SpellCheckerUnderlineStyle,
|
|
nsILookAndFeel::eMetricFloat_SpellCheckerUnderlineRelativeSize }
|
|
};
|
|
|
|
void
|
|
nsTextPaintStyle::InitSelectionStyle(PRInt32 aIndex)
|
|
{
|
|
NS_ASSERTION(aIndex >= 0 && aIndex < 5, "aIndex is invalid");
|
|
nsSelectionStyle* selectionStyle = &mSelectionStyle[aIndex];
|
|
if (selectionStyle->mInit)
|
|
return;
|
|
|
|
StyleIDs* styleIDs = &SelectionStyleIDs[aIndex];
|
|
|
|
nsILookAndFeel* look = mPresContext->LookAndFeel();
|
|
nscolor foreColor, backColor;
|
|
if (styleIDs->mForeground == nsILookAndFeel::eColor_LAST_COLOR) {
|
|
foreColor = NS_SAME_AS_FOREGROUND_COLOR;
|
|
} else {
|
|
look->GetColor(styleIDs->mForeground, foreColor);
|
|
}
|
|
if (styleIDs->mBackground == nsILookAndFeel::eColor_LAST_COLOR) {
|
|
backColor = NS_TRANSPARENT;
|
|
} else {
|
|
look->GetColor(styleIDs->mBackground, backColor);
|
|
}
|
|
|
|
// Convert special color to actual color
|
|
NS_ASSERTION(foreColor != NS_TRANSPARENT,
|
|
"foreColor cannot be NS_TRANSPARENT");
|
|
NS_ASSERTION(backColor != NS_SAME_AS_FOREGROUND_COLOR,
|
|
"backColor cannot be NS_SAME_AS_FOREGROUND_COLOR");
|
|
NS_ASSERTION(backColor != NS_40PERCENT_FOREGROUND_COLOR,
|
|
"backColor cannot be NS_40PERCENT_FOREGROUND_COLOR");
|
|
|
|
foreColor = GetResolvedForeColor(foreColor, GetTextColor(), backColor);
|
|
|
|
if (NS_GET_A(backColor) > 0)
|
|
EnsureSufficientContrast(&foreColor, &backColor);
|
|
|
|
nscolor lineColor;
|
|
float relativeSize;
|
|
PRUint8 lineStyle;
|
|
GetSelectionUnderline(mPresContext, aIndex,
|
|
&lineColor, &relativeSize, &lineStyle);
|
|
lineColor = GetResolvedForeColor(lineColor, foreColor, backColor);
|
|
|
|
selectionStyle->mTextColor = foreColor;
|
|
selectionStyle->mBGColor = backColor;
|
|
selectionStyle->mUnderlineColor = lineColor;
|
|
selectionStyle->mUnderlineStyle = lineStyle;
|
|
selectionStyle->mUnderlineRelativeSize = relativeSize;
|
|
selectionStyle->mInit = PR_TRUE;
|
|
}
|
|
|
|
/* static */ PRBool
|
|
nsTextPaintStyle::GetSelectionUnderline(nsPresContext* aPresContext,
|
|
PRInt32 aIndex,
|
|
nscolor* aLineColor,
|
|
float* aRelativeSize,
|
|
PRUint8* aStyle)
|
|
{
|
|
NS_ASSERTION(aPresContext, "aPresContext is null");
|
|
NS_ASSERTION(aRelativeSize, "aRelativeSize is null");
|
|
NS_ASSERTION(aStyle, "aStyle is null");
|
|
NS_ASSERTION(aIndex >= 0 && aIndex < 5, "Index out of range");
|
|
|
|
nsILookAndFeel* look = aPresContext->LookAndFeel();
|
|
|
|
StyleIDs& styleID = SelectionStyleIDs[aIndex];
|
|
nscolor color;
|
|
float size;
|
|
PRInt32 style;
|
|
|
|
look->GetColor(styleID.mLine, color);
|
|
look->GetMetric(styleID.mLineStyle, style);
|
|
if (style > NS_STYLE_TEXT_DECORATION_STYLE_MAX) {
|
|
NS_ERROR("Invalid underline style value is specified");
|
|
style = NS_STYLE_TEXT_DECORATION_STYLE_SOLID;
|
|
}
|
|
look->GetMetric(styleID.mLineRelativeSize, size);
|
|
|
|
NS_ASSERTION(size, "selection underline relative size must be larger than 0");
|
|
|
|
if (aLineColor) {
|
|
*aLineColor = color;
|
|
}
|
|
*aRelativeSize = size;
|
|
*aStyle = style;
|
|
|
|
return style != NS_STYLE_TEXT_DECORATION_STYLE_NONE &&
|
|
color != NS_TRANSPARENT &&
|
|
size > 0.0f;
|
|
}
|
|
|
|
inline nscolor Get40PercentColor(nscolor aForeColor, nscolor aBackColor)
|
|
{
|
|
nscolor foreColor = NS_RGBA(NS_GET_R(aForeColor),
|
|
NS_GET_G(aForeColor),
|
|
NS_GET_B(aForeColor),
|
|
(PRUint8)(255 * 0.4f));
|
|
// Don't use true alpha color for readability.
|
|
return NS_ComposeColors(aBackColor, foreColor);
|
|
}
|
|
|
|
nscolor
|
|
nsTextPaintStyle::GetResolvedForeColor(nscolor aColor,
|
|
nscolor aDefaultForeColor,
|
|
nscolor aBackColor)
|
|
{
|
|
if (aColor == NS_SAME_AS_FOREGROUND_COLOR)
|
|
return aDefaultForeColor;
|
|
|
|
if (aColor != NS_40PERCENT_FOREGROUND_COLOR)
|
|
return aColor;
|
|
|
|
// Get actual background color
|
|
nscolor actualBGColor = aBackColor;
|
|
if (actualBGColor == NS_TRANSPARENT) {
|
|
InitCommonColors();
|
|
actualBGColor = mFrameBackgroundColor;
|
|
}
|
|
return Get40PercentColor(aDefaultForeColor, actualBGColor);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#ifdef ACCESSIBILITY
|
|
already_AddRefed<nsAccessible>
|
|
nsTextFrame::CreateAccessible()
|
|
{
|
|
if (IsEmpty()) {
|
|
nsAutoString renderedWhitespace;
|
|
GetRenderedText(&renderedWhitespace, nsnull, nsnull, 0, 1);
|
|
if (renderedWhitespace.IsEmpty()) {
|
|
return nsnull;
|
|
}
|
|
}
|
|
|
|
nsAccessibilityService* accService = nsIPresShell::AccService();
|
|
if (accService) {
|
|
return accService->CreateHTMLTextAccessible(mContent,
|
|
PresContext()->PresShell());
|
|
}
|
|
return nsnull;
|
|
}
|
|
#endif
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
NS_IMETHODIMP
|
|
nsTextFrame::Init(nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
NS_ASSERTION(!aPrevInFlow, "Can't be a continuation!");
|
|
NS_PRECONDITION(aContent->IsNodeOfType(nsINode::eTEXT),
|
|
"Bogus content!");
|
|
|
|
// Remove any NewlineOffsetProperty or InFlowContentLengthProperty since they
|
|
// might be invalid if the content was modified while there was no frame
|
|
aContent->DeleteProperty(nsGkAtoms::newline);
|
|
if (PresContext()->BidiEnabled()) {
|
|
aContent->DeleteProperty(nsGkAtoms::flowlength);
|
|
}
|
|
|
|
// Since our content has a frame now, this flag is no longer needed.
|
|
aContent->UnsetFlags(NS_CREATE_FRAME_IF_NON_WHITESPACE);
|
|
// We're not a continuing frame.
|
|
// mContentOffset = 0; not necessary since we get zeroed out at init
|
|
return nsFrame::Init(aContent, aParent, aPrevInFlow);
|
|
}
|
|
|
|
void
|
|
nsTextFrame::ClearFrameOffsetCache()
|
|
{
|
|
// See if we need to remove ourselves from the offset cache
|
|
if (GetStateBits() & TEXT_IN_OFFSET_CACHE) {
|
|
nsIFrame* primaryFrame = mContent->GetPrimaryFrame();
|
|
if (primaryFrame) {
|
|
// The primary frame might be null here. For example, nsLineBox::DeleteLineList
|
|
// just destroys the frames in order, which means that the primary frame is already
|
|
// dead if we're a continuing text frame, in which case, all of its properties are
|
|
// gone, and we don't need to worry about deleting this property here.
|
|
primaryFrame->Properties().Delete(OffsetToFrameProperty());
|
|
}
|
|
RemoveStateBits(TEXT_IN_OFFSET_CACHE);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsTextFrame::DestroyFrom(nsIFrame* aDestructRoot)
|
|
{
|
|
ClearFrameOffsetCache();
|
|
|
|
// We might want to clear NS_CREATE_FRAME_IF_NON_WHITESPACE or
|
|
// NS_REFRAME_IF_WHITESPACE on mContent here, since our parent frame
|
|
// type might be changing. Not clear whether it's worth it.
|
|
ClearTextRun(nsnull);
|
|
if (mNextContinuation) {
|
|
mNextContinuation->SetPrevInFlow(nsnull);
|
|
}
|
|
// Let the base class destroy the frame
|
|
nsFrame::DestroyFrom(aDestructRoot);
|
|
}
|
|
|
|
class nsContinuingTextFrame : public nsTextFrame {
|
|
public:
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
friend nsIFrame* NS_NewContinuingTextFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
|
|
|
|
NS_IMETHOD Init(nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow);
|
|
|
|
virtual void DestroyFrom(nsIFrame* aDestructRoot);
|
|
|
|
virtual nsIFrame* GetPrevContinuation() const {
|
|
return mPrevContinuation;
|
|
}
|
|
NS_IMETHOD SetPrevContinuation(nsIFrame* aPrevContinuation) {
|
|
NS_ASSERTION (!aPrevContinuation || GetType() == aPrevContinuation->GetType(),
|
|
"setting a prev continuation with incorrect type!");
|
|
NS_ASSERTION (!nsSplittableFrame::IsInPrevContinuationChain(aPrevContinuation, this),
|
|
"creating a loop in continuation chain!");
|
|
mPrevContinuation = aPrevContinuation;
|
|
RemoveStateBits(NS_FRAME_IS_FLUID_CONTINUATION);
|
|
return NS_OK;
|
|
}
|
|
virtual nsIFrame* GetPrevInFlowVirtual() const { return GetPrevInFlow(); }
|
|
nsIFrame* GetPrevInFlow() const {
|
|
return (GetStateBits() & NS_FRAME_IS_FLUID_CONTINUATION) ? mPrevContinuation : nsnull;
|
|
}
|
|
NS_IMETHOD SetPrevInFlow(nsIFrame* aPrevInFlow) {
|
|
NS_ASSERTION (!aPrevInFlow || GetType() == aPrevInFlow->GetType(),
|
|
"setting a prev in flow with incorrect type!");
|
|
NS_ASSERTION (!nsSplittableFrame::IsInPrevContinuationChain(aPrevInFlow, this),
|
|
"creating a loop in continuation chain!");
|
|
mPrevContinuation = aPrevInFlow;
|
|
AddStateBits(NS_FRAME_IS_FLUID_CONTINUATION);
|
|
return NS_OK;
|
|
}
|
|
virtual nsIFrame* GetFirstInFlow() const;
|
|
virtual nsIFrame* GetFirstContinuation() const;
|
|
|
|
virtual void AddInlineMinWidth(nsRenderingContext *aRenderingContext,
|
|
InlineMinWidthData *aData);
|
|
virtual void AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
|
|
InlinePrefWidthData *aData);
|
|
|
|
virtual nsresult GetRenderedText(nsAString* aString = nsnull,
|
|
gfxSkipChars* aSkipChars = nsnull,
|
|
gfxSkipCharsIterator* aSkipIter = nsnull,
|
|
PRUint32 aSkippedStartOffset = 0,
|
|
PRUint32 aSkippedMaxLength = PR_UINT32_MAX)
|
|
{ return NS_ERROR_NOT_IMPLEMENTED; } // Call on a primary text frame only
|
|
|
|
protected:
|
|
nsContinuingTextFrame(nsStyleContext* aContext) : nsTextFrame(aContext) {}
|
|
nsIFrame* mPrevContinuation;
|
|
};
|
|
|
|
NS_IMETHODIMP
|
|
nsContinuingTextFrame::Init(nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
NS_ASSERTION(aPrevInFlow, "Must be a continuation!");
|
|
// NOTE: bypassing nsTextFrame::Init!!!
|
|
nsresult rv = nsFrame::Init(aContent, aParent, aPrevInFlow);
|
|
|
|
#ifdef IBMBIDI
|
|
nsTextFrame* nextContinuation =
|
|
static_cast<nsTextFrame*>(aPrevInFlow->GetNextContinuation());
|
|
#endif // IBMBIDI
|
|
// Hook the frame into the flow
|
|
SetPrevInFlow(aPrevInFlow);
|
|
aPrevInFlow->SetNextInFlow(this);
|
|
nsTextFrame* prev = static_cast<nsTextFrame*>(aPrevInFlow);
|
|
mContentOffset = prev->GetContentOffset() + prev->GetContentLengthHint();
|
|
NS_ASSERTION(mContentOffset < PRInt32(aContent->GetText()->GetLength()),
|
|
"Creating ContinuingTextFrame, but there is no more content");
|
|
if (prev->GetStyleContext() != GetStyleContext()) {
|
|
// We're taking part of prev's text, and its style may be different
|
|
// so clear its textrun which may no longer be valid (and don't set ours)
|
|
prev->ClearTextRun(nsnull);
|
|
} else {
|
|
mTextRun = prev->GetTextRun();
|
|
}
|
|
#ifdef IBMBIDI
|
|
if (aPrevInFlow->GetStateBits() & NS_FRAME_IS_BIDI) {
|
|
FramePropertyTable *propTable = PresContext()->PropertyTable();
|
|
// Get all the properties from the prev-in-flow first to take
|
|
// advantage of the propTable's cache and simplify the assertion below
|
|
void* embeddingLevel = propTable->Get(aPrevInFlow, EmbeddingLevelProperty());
|
|
void* baseLevel = propTable->Get(aPrevInFlow, BaseLevelProperty());
|
|
propTable->Set(this, EmbeddingLevelProperty(), embeddingLevel);
|
|
propTable->Set(this, BaseLevelProperty(), baseLevel);
|
|
|
|
if (nextContinuation) {
|
|
SetNextContinuation(nextContinuation);
|
|
nextContinuation->SetPrevContinuation(this);
|
|
// Adjust next-continuations' content offset as needed.
|
|
while (nextContinuation &&
|
|
nextContinuation->GetContentOffset() < mContentOffset) {
|
|
NS_ASSERTION(
|
|
embeddingLevel == propTable->Get(nextContinuation, EmbeddingLevelProperty()) &&
|
|
baseLevel == propTable->Get(nextContinuation, BaseLevelProperty()),
|
|
"stealing text from different type of BIDI continuation");
|
|
nextContinuation->mContentOffset = mContentOffset;
|
|
nextContinuation = static_cast<nsTextFrame*>(nextContinuation->GetNextContinuation());
|
|
}
|
|
}
|
|
mState |= NS_FRAME_IS_BIDI;
|
|
} // prev frame is bidi
|
|
#endif // IBMBIDI
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsContinuingTextFrame::DestroyFrom(nsIFrame* aDestructRoot)
|
|
{
|
|
ClearFrameOffsetCache();
|
|
|
|
// The text associated with this frame will become associated with our
|
|
// prev-continuation. If that means the text has changed style, then
|
|
// we need to wipe out the text run for the text.
|
|
// Note that mPrevContinuation can be null if we're destroying the whole
|
|
// frame chain from the start to the end.
|
|
// If this frame is mentioned in the userData for a textrun (say
|
|
// because there's a direction change at the start of this frame), then
|
|
// we have to clear the textrun because we're going away and the
|
|
// textrun had better not keep a dangling reference to us.
|
|
if ((GetStateBits() & TEXT_IN_TEXTRUN_USER_DATA) ||
|
|
!mPrevContinuation ||
|
|
mPrevContinuation->GetStyleContext() != GetStyleContext()) {
|
|
ClearTextRun(nsnull);
|
|
// Clear the previous continuation's text run also, so that it can rebuild
|
|
// the text run to include our text.
|
|
if (mPrevContinuation) {
|
|
(static_cast<nsTextFrame*>(mPrevContinuation))->ClearTextRun(nsnull);
|
|
}
|
|
}
|
|
nsSplittableFrame::RemoveFromFlow(this);
|
|
// Let the base class destroy the frame
|
|
nsFrame::DestroyFrom(aDestructRoot);
|
|
}
|
|
|
|
nsIFrame*
|
|
nsContinuingTextFrame::GetFirstInFlow() const
|
|
{
|
|
// Can't cast to |nsContinuingTextFrame*| because the first one isn't.
|
|
nsIFrame *firstInFlow,
|
|
*previous = const_cast<nsIFrame*>
|
|
(static_cast<const nsIFrame*>(this));
|
|
do {
|
|
firstInFlow = previous;
|
|
previous = firstInFlow->GetPrevInFlow();
|
|
} while (previous);
|
|
return firstInFlow;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsContinuingTextFrame::GetFirstContinuation() const
|
|
{
|
|
// Can't cast to |nsContinuingTextFrame*| because the first one isn't.
|
|
nsIFrame *firstContinuation,
|
|
*previous = const_cast<nsIFrame*>
|
|
(static_cast<const nsIFrame*>(mPrevContinuation));
|
|
|
|
NS_ASSERTION(previous, "How can an nsContinuingTextFrame be the first continuation?");
|
|
|
|
do {
|
|
firstContinuation = previous;
|
|
previous = firstContinuation->GetPrevContinuation();
|
|
} while (previous);
|
|
return firstContinuation;
|
|
}
|
|
|
|
// XXX Do we want to do all the work for the first-in-flow or do the
|
|
// work for each part? (Be careful of first-letter / first-line, though,
|
|
// especially first-line!) Doing all the work on the first-in-flow has
|
|
// the advantage of avoiding the potential for incremental reflow bugs,
|
|
// but depends on our maintining the frame tree in reasonable ways even
|
|
// for edge cases (block-within-inline splits, nextBidi, etc.)
|
|
|
|
// XXX We really need to make :first-letter happen during frame
|
|
// construction.
|
|
|
|
// Needed for text frames in XUL.
|
|
/* virtual */ nscoord
|
|
nsTextFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
|
|
{
|
|
return nsLayoutUtils::MinWidthFromInline(this, aRenderingContext);
|
|
}
|
|
|
|
// Needed for text frames in XUL.
|
|
/* virtual */ nscoord
|
|
nsTextFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
|
|
{
|
|
return nsLayoutUtils::PrefWidthFromInline(this, aRenderingContext);
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsContinuingTextFrame::AddInlineMinWidth(nsRenderingContext *aRenderingContext,
|
|
InlineMinWidthData *aData)
|
|
{
|
|
// Do nothing, since the first-in-flow accounts for everything.
|
|
return;
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsContinuingTextFrame::AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
|
|
InlinePrefWidthData *aData)
|
|
{
|
|
// Do nothing, since the first-in-flow accounts for everything.
|
|
return;
|
|
}
|
|
|
|
static void
|
|
DestroySelectionDetails(SelectionDetails* aDetails)
|
|
{
|
|
while (aDetails) {
|
|
SelectionDetails* next = aDetails->mNext;
|
|
delete aDetails;
|
|
aDetails = next;
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
#if defined(DEBUG_rbs) || defined(DEBUG_bzbarsky)
|
|
static void
|
|
VerifyNotDirty(nsFrameState state)
|
|
{
|
|
PRBool isZero = state & NS_FRAME_FIRST_REFLOW;
|
|
PRBool isDirty = state & NS_FRAME_IS_DIRTY;
|
|
if (!isZero && isDirty)
|
|
NS_WARNING("internal offsets may be out-of-sync");
|
|
}
|
|
#define DEBUG_VERIFY_NOT_DIRTY(state) \
|
|
VerifyNotDirty(state)
|
|
#else
|
|
#define DEBUG_VERIFY_NOT_DIRTY(state)
|
|
#endif
|
|
|
|
nsIFrame*
|
|
NS_NewTextFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
|
|
{
|
|
return new (aPresShell) nsTextFrame(aContext);
|
|
}
|
|
|
|
NS_IMPL_FRAMEARENA_HELPERS(nsTextFrame)
|
|
|
|
nsIFrame*
|
|
NS_NewContinuingTextFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
|
|
{
|
|
return new (aPresShell) nsContinuingTextFrame(aContext);
|
|
}
|
|
|
|
NS_IMPL_FRAMEARENA_HELPERS(nsContinuingTextFrame)
|
|
|
|
nsTextFrame::~nsTextFrame()
|
|
{
|
|
if (0 != (mState & TEXT_BLINK_ON))
|
|
{
|
|
nsBlinkTimer::RemoveBlinkFrame(this);
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetCursor(const nsPoint& aPoint,
|
|
nsIFrame::Cursor& aCursor)
|
|
{
|
|
FillCursorInformationFromStyle(GetStyleUserInterface(), aCursor);
|
|
if (NS_STYLE_CURSOR_AUTO == aCursor.mCursor) {
|
|
aCursor.mCursor = NS_STYLE_CURSOR_TEXT;
|
|
|
|
// If tabindex >= 0, use default cursor to indicate it's not selectable
|
|
nsIFrame *ancestorFrame = this;
|
|
while ((ancestorFrame = ancestorFrame->GetParent()) != nsnull) {
|
|
nsIContent *ancestorContent = ancestorFrame->GetContent();
|
|
if (ancestorContent && ancestorContent->HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex)) {
|
|
nsAutoString tabIndexStr;
|
|
ancestorContent->GetAttr(kNameSpaceID_None, nsGkAtoms::tabindex, tabIndexStr);
|
|
if (!tabIndexStr.IsEmpty()) {
|
|
PRInt32 rv, tabIndexVal = tabIndexStr.ToInteger(&rv);
|
|
if (NS_SUCCEEDED(rv) && tabIndexVal >= 0) {
|
|
aCursor.mCursor = NS_STYLE_CURSOR_DEFAULT;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsTextFrame::GetLastInFlow() const
|
|
{
|
|
nsTextFrame* lastInFlow = const_cast<nsTextFrame*>(this);
|
|
while (lastInFlow->GetNextInFlow()) {
|
|
lastInFlow = static_cast<nsTextFrame*>(lastInFlow->GetNextInFlow());
|
|
}
|
|
NS_POSTCONDITION(lastInFlow, "illegal state in flow chain.");
|
|
return lastInFlow;
|
|
}
|
|
nsIFrame*
|
|
nsTextFrame::GetLastContinuation() const
|
|
{
|
|
nsTextFrame* lastInFlow = const_cast<nsTextFrame*>(this);
|
|
while (lastInFlow->mNextContinuation) {
|
|
lastInFlow = static_cast<nsTextFrame*>(lastInFlow->mNextContinuation);
|
|
}
|
|
NS_POSTCONDITION(lastInFlow, "illegal state in continuation chain.");
|
|
return lastInFlow;
|
|
}
|
|
|
|
void
|
|
nsTextFrame::ClearTextRun(nsTextFrame* aStartContinuation)
|
|
{
|
|
// save textrun because ClearAllTextRunReferences may clear ours
|
|
gfxTextRun* textRun = mTextRun;
|
|
|
|
if (!textRun)
|
|
return;
|
|
|
|
UnhookTextRunFromFrames(textRun, aStartContinuation);
|
|
// see comments in BuildTextRunForFrames...
|
|
// if (textRun->GetFlags() & gfxFontGroup::TEXT_IS_PERSISTENT) {
|
|
// NS_ERROR("Shouldn't reach here for now...");
|
|
// // the textrun's text may be referencing a DOM node that has changed,
|
|
// // so we'd better kill this textrun now.
|
|
// if (textRun->GetExpirationState()->IsTracked()) {
|
|
// gTextRuns->RemoveFromCache(textRun);
|
|
// }
|
|
// delete textRun;
|
|
// return;
|
|
// }
|
|
|
|
if (!(textRun->GetFlags() & gfxTextRunWordCache::TEXT_IN_CACHE) &&
|
|
!textRun->GetUserData()) {
|
|
// Remove it now because it's not doing anything useful
|
|
gTextRuns->RemoveFromCache(textRun);
|
|
delete textRun;
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::CharacterDataChanged(CharacterDataChangeInfo* aInfo)
|
|
{
|
|
mContent->DeleteProperty(nsGkAtoms::newline);
|
|
if (PresContext()->BidiEnabled()) {
|
|
mContent->DeleteProperty(nsGkAtoms::flowlength);
|
|
}
|
|
|
|
// Find the first frame whose text has changed. Frames that are entirely
|
|
// before the text change are completely unaffected.
|
|
nsTextFrame* next;
|
|
nsTextFrame* textFrame = this;
|
|
while (PR_TRUE) {
|
|
next = static_cast<nsTextFrame*>(textFrame->GetNextContinuation());
|
|
if (!next || next->GetContentOffset() > PRInt32(aInfo->mChangeStart))
|
|
break;
|
|
textFrame = next;
|
|
}
|
|
|
|
PRInt32 endOfChangedText = aInfo->mChangeStart + aInfo->mReplaceLength;
|
|
nsTextFrame* lastDirtiedFrame = nsnull;
|
|
|
|
nsIPresShell* shell = PresContext()->GetPresShell();
|
|
do {
|
|
// textFrame contained deleted text (or the insertion point,
|
|
// if this was a pure insertion).
|
|
textFrame->mState &= ~TEXT_WHITESPACE_FLAGS;
|
|
textFrame->ClearTextRun(nsnull);
|
|
if (!lastDirtiedFrame ||
|
|
lastDirtiedFrame->GetParent() != textFrame->GetParent()) {
|
|
// Ask the parent frame to reflow me.
|
|
shell->FrameNeedsReflow(textFrame, nsIPresShell::eStyleChange,
|
|
NS_FRAME_IS_DIRTY);
|
|
lastDirtiedFrame = textFrame;
|
|
} else {
|
|
// if the parent is a block, we're cheating here because we should
|
|
// be marking our line dirty, but we're not. nsTextFrame::SetLength
|
|
// will do that when it gets called during reflow.
|
|
textFrame->AddStateBits(NS_FRAME_IS_DIRTY);
|
|
}
|
|
|
|
// Below, frames that start after the deleted text will be adjusted so that
|
|
// their offsets move with the trailing unchanged text. If this change
|
|
// deletes more text than it inserts, those frame offsets will decrease.
|
|
// We need to maintain the invariant that mContentOffset is non-decreasing
|
|
// along the continuation chain. So we need to ensure that frames that
|
|
// started in the deleted text are all still starting before the
|
|
// unchanged text.
|
|
if (textFrame->mContentOffset > endOfChangedText) {
|
|
textFrame->mContentOffset = endOfChangedText;
|
|
}
|
|
|
|
textFrame = static_cast<nsTextFrame*>(textFrame->GetNextContinuation());
|
|
} while (textFrame && textFrame->GetContentOffset() < PRInt32(aInfo->mChangeEnd));
|
|
|
|
// This is how much the length of the string changed by --- i.e.,
|
|
// how much the trailing unchanged text moved.
|
|
PRInt32 sizeChange =
|
|
aInfo->mChangeStart + aInfo->mReplaceLength - aInfo->mChangeEnd;
|
|
|
|
if (sizeChange) {
|
|
// Fix the offsets of the text frames that start in the trailing
|
|
// unchanged text.
|
|
while (textFrame) {
|
|
textFrame->mContentOffset += sizeChange;
|
|
// XXX we could rescue some text runs by adjusting their user data
|
|
// to reflect the change in DOM offsets
|
|
textFrame->ClearTextRun(nsnull);
|
|
textFrame = static_cast<nsTextFrame*>(textFrame->GetNextContinuation());
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsTextFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
|
|
{
|
|
nsFrame::DidSetStyleContext(aOldStyleContext);
|
|
ClearTextRun(nsnull);
|
|
}
|
|
|
|
class nsDisplayText : public nsDisplayItem {
|
|
public:
|
|
nsDisplayText(nsDisplayListBuilder* aBuilder, nsTextFrame* aFrame) :
|
|
nsDisplayItem(aBuilder, aFrame),
|
|
mDisableSubpixelAA(PR_FALSE) {
|
|
MOZ_COUNT_CTOR(nsDisplayText);
|
|
}
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
virtual ~nsDisplayText() {
|
|
MOZ_COUNT_DTOR(nsDisplayText);
|
|
}
|
|
#endif
|
|
|
|
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder) {
|
|
return mFrame->GetVisualOverflowRect() + ToReferenceFrame();
|
|
}
|
|
virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
|
|
HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) {
|
|
if (nsRect(ToReferenceFrame(), mFrame->GetSize()).Intersects(aRect)) {
|
|
aOutFrames->AppendElement(mFrame);
|
|
}
|
|
}
|
|
virtual void Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx);
|
|
NS_DISPLAY_DECL_NAME("Text", TYPE_TEXT)
|
|
|
|
virtual nsRect GetComponentAlphaBounds(nsDisplayListBuilder* aBuilder)
|
|
{
|
|
return GetBounds(aBuilder);
|
|
}
|
|
|
|
virtual void DisableComponentAlpha() { mDisableSubpixelAA = PR_TRUE; }
|
|
|
|
PRPackedBool mDisableSubpixelAA;
|
|
};
|
|
|
|
void
|
|
nsDisplayText::Paint(nsDisplayListBuilder* aBuilder,
|
|
nsRenderingContext* aCtx) {
|
|
// Add 1 pixel of dirty area around mVisibleRect to allow us to paint
|
|
// antialiased pixels beyond the measured text extents.
|
|
// This is temporary until we do this in the actual calculation of text extents.
|
|
nsRect extraVisible = mVisibleRect;
|
|
nscoord appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
|
|
extraVisible.Inflate(appUnitsPerDevPixel, appUnitsPerDevPixel);
|
|
nsTextFrame* f = static_cast<nsTextFrame*>(mFrame);
|
|
|
|
gfxContextAutoDisableSubpixelAntialiasing disable(aCtx->ThebesContext(),
|
|
mDisableSubpixelAA);
|
|
f->PaintText(aCtx, ToReferenceFrame(), extraVisible);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists)
|
|
{
|
|
if (!IsVisibleForPainting(aBuilder))
|
|
return NS_OK;
|
|
|
|
DO_GLOBAL_REFLOW_COUNT_DSP("nsTextFrame");
|
|
|
|
if ((0 != (mState & TEXT_BLINK_ON)) && nsBlinkTimer::GetBlinkIsOff() &&
|
|
PresContext()->IsDynamic() && !aBuilder->IsForEventDelivery())
|
|
return NS_OK;
|
|
|
|
return aLists.Content()->AppendNewToTop(
|
|
new (aBuilder) nsDisplayText(aBuilder, this));
|
|
}
|
|
|
|
static nsIFrame*
|
|
GetGeneratedContentOwner(nsIFrame* aFrame, PRBool* aIsBefore)
|
|
{
|
|
*aIsBefore = PR_FALSE;
|
|
while (aFrame && (aFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT)) {
|
|
if (aFrame->GetStyleContext()->GetPseudo() == nsCSSPseudoElements::before) {
|
|
*aIsBefore = PR_TRUE;
|
|
}
|
|
aFrame = aFrame->GetParent();
|
|
}
|
|
return aFrame;
|
|
}
|
|
|
|
SelectionDetails*
|
|
nsTextFrame::GetSelectionDetails()
|
|
{
|
|
const nsFrameSelection* frameSelection = GetConstFrameSelection();
|
|
if (!(GetStateBits() & NS_FRAME_GENERATED_CONTENT)) {
|
|
SelectionDetails* details =
|
|
frameSelection->LookUpSelection(mContent, GetContentOffset(),
|
|
GetContentLength(), PR_FALSE);
|
|
SelectionDetails* sd;
|
|
for (sd = details; sd; sd = sd->mNext) {
|
|
sd->mStart += mContentOffset;
|
|
sd->mEnd += mContentOffset;
|
|
}
|
|
return details;
|
|
}
|
|
|
|
// Check if the beginning or end of the element is selected, depending on
|
|
// whether we're :before content or :after content.
|
|
PRBool isBefore;
|
|
nsIFrame* owner = GetGeneratedContentOwner(this, &isBefore);
|
|
if (!owner || !owner->GetContent())
|
|
return nsnull;
|
|
|
|
SelectionDetails* details =
|
|
frameSelection->LookUpSelection(owner->GetContent(),
|
|
isBefore ? 0 : owner->GetContent()->GetChildCount(), 0, PR_FALSE);
|
|
SelectionDetails* sd;
|
|
for (sd = details; sd; sd = sd->mNext) {
|
|
// The entire text is selected!
|
|
sd->mStart = GetContentOffset();
|
|
sd->mEnd = GetContentEnd();
|
|
}
|
|
return details;
|
|
}
|
|
|
|
static void
|
|
FillClippedRect(gfxContext* aCtx, nsPresContext* aPresContext,
|
|
nscolor aColor, const gfxRect& aDirtyRect, const gfxRect& aRect)
|
|
{
|
|
gfxRect r = aRect.Intersect(aDirtyRect);
|
|
// For now, we need to put this in pixel coordinates
|
|
PRInt32 app = aPresContext->AppUnitsPerDevPixel();
|
|
aCtx->NewPath();
|
|
// pixel-snap
|
|
aCtx->Rectangle(gfxRect(r.X() / app, r.Y() / app,
|
|
r.Width() / app, r.Height() / app), PR_TRUE);
|
|
aCtx->SetColor(gfxRGBA(aColor));
|
|
aCtx->Fill();
|
|
}
|
|
|
|
nsTextFrame::TextDecorations
|
|
nsTextFrame::GetTextDecorations(nsPresContext* aPresContext)
|
|
{
|
|
TextDecorations decorations;
|
|
|
|
// Quirks mode text decoration are rendered by children; see bug 1777
|
|
// In non-quirks mode, nsHTMLContainer::Paint and nsBlockFrame::Paint
|
|
// does the painting of text decorations.
|
|
// FIXME Bug 403524: We'd like to unify standards-mode and quirks-mode
|
|
// text-decoration drawing, using what's currently the quirks mode
|
|
// codepath. But for now this code is only used for quirks mode.
|
|
const nsCompatibility compatMode = aPresContext->CompatibilityMode();
|
|
if (compatMode != eCompatibility_NavQuirks)
|
|
return decorations;
|
|
|
|
PRBool useOverride = PR_FALSE;
|
|
nscolor overrideColor;
|
|
|
|
// A mask of all possible decorations.
|
|
// FIXME: Per spec, we still need to draw all relevant decorations
|
|
// from ancestors, not just the nearest one from each.
|
|
PRUint8 decorMask = NS_STYLE_TEXT_DECORATION_LINE_LINES_MASK;
|
|
|
|
PRBool isChild; // ignored
|
|
for (nsIFrame* f = this; decorMask && f;
|
|
NS_SUCCEEDED(f->GetParentStyleContextFrame(aPresContext, &f, &isChild))
|
|
|| (f = nsnull)) {
|
|
nsStyleContext* context = f->GetStyleContext();
|
|
if (!context->HasTextDecorationLines()) {
|
|
break;
|
|
}
|
|
const nsStyleTextReset* styleText = context->GetStyleTextReset();
|
|
if (!useOverride &&
|
|
(NS_STYLE_TEXT_DECORATION_LINE_OVERRIDE_ALL &
|
|
styleText->mTextDecorationLine)) {
|
|
// This handles the <a href="blah.html"><font color="green">La
|
|
// la la</font></a> case. The link underline should be green.
|
|
useOverride = PR_TRUE;
|
|
overrideColor = context->GetVisitedDependentColor(
|
|
eCSSProperty_text_decoration_color);
|
|
}
|
|
|
|
// FIXME: see above (remove this check)
|
|
PRUint8 useDecorations = decorMask & styleText->mTextDecorationLine;
|
|
if (useDecorations) {// a decoration defined here
|
|
nscolor color = context->GetVisitedDependentColor(
|
|
eCSSProperty_text_decoration_color);
|
|
|
|
// FIXME: We also need to record the thickness and position
|
|
// metrics appropriate to this element (at least in standards
|
|
// mode). This will require adjusting the visual overflow region
|
|
// of this frame and maybe its ancestors. The positions should
|
|
// probably be relative to the line's baseline (when text
|
|
// decorations are specified on inlines we should look for their
|
|
// containing line; otherwise use the element's font); when
|
|
// drawing it should always be relative to the line baseline.
|
|
// This way we move the decorations for relative positioning.
|
|
if (NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE & useDecorations) {
|
|
decorations.mUnderColor = useOverride ? overrideColor : color;
|
|
decorations.mUnderStyle = styleText->GetDecorationStyle();
|
|
decorMask &= ~NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE;
|
|
decorations.mDecorations |= NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE;
|
|
}
|
|
if (NS_STYLE_TEXT_DECORATION_LINE_OVERLINE & useDecorations) {
|
|
decorations.mOverColor = useOverride ? overrideColor : color;
|
|
decorations.mOverStyle = styleText->GetDecorationStyle();
|
|
decorMask &= ~NS_STYLE_TEXT_DECORATION_LINE_OVERLINE;
|
|
decorations.mDecorations |= NS_STYLE_TEXT_DECORATION_LINE_OVERLINE;
|
|
}
|
|
if (NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH & useDecorations) {
|
|
decorations.mStrikeColor = useOverride ? overrideColor : color;
|
|
decorations.mStrikeStyle = styleText->GetDecorationStyle();
|
|
decorMask &= ~NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH;
|
|
decorations.mDecorations |= NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH;
|
|
}
|
|
}
|
|
|
|
// In all modes, if we're on an inline-block or inline-table (or
|
|
// inline-stack, inline-box, inline-grid), we're done.
|
|
const nsStyleDisplay *disp = context->GetStyleDisplay();
|
|
if (disp->mDisplay != NS_STYLE_DISPLAY_INLINE &&
|
|
disp->IsInlineOutside()) {
|
|
break;
|
|
}
|
|
|
|
if (compatMode == eCompatibility_NavQuirks) {
|
|
// In quirks mode, if we're on an HTML table element, we're done.
|
|
if (f->GetContent()->IsHTML(nsGkAtoms::table)) {
|
|
break;
|
|
}
|
|
} else {
|
|
// In standards/almost-standards mode, if we're on an
|
|
// absolutely-positioned element or a floating element, we're done.
|
|
if (disp->IsFloating() || disp->IsAbsolutelyPositioned()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return decorations;
|
|
}
|
|
|
|
void
|
|
nsTextFrame::UnionTextDecorationOverflow(nsPresContext* aPresContext,
|
|
PropertyProvider& aProvider,
|
|
nsRect* aVisualOverflowRect)
|
|
{
|
|
// Text-shadow overflows
|
|
nsRect shadowRect =
|
|
nsLayoutUtils::GetTextShadowRectsUnion(*aVisualOverflowRect, this);
|
|
aVisualOverflowRect->UnionRect(*aVisualOverflowRect, shadowRect);
|
|
|
|
if (IsFloatingFirstLetterChild()) {
|
|
// The underline/overline drawable area must be contained in the overflow
|
|
// rect when this is in floating first letter frame at *both* modes.
|
|
nsFontMetrics* fm = aProvider.GetFontMetrics();
|
|
nscoord fontAscent = fm->MaxAscent();
|
|
nscoord fontHeight = fm->MaxHeight();
|
|
nsRect fontRect(0, mAscent - fontAscent, GetSize().width, fontHeight);
|
|
aVisualOverflowRect->UnionRect(*aVisualOverflowRect, fontRect);
|
|
}
|
|
|
|
// When this frame is not selected, the text-decoration area must be in
|
|
// frame bounds.
|
|
nsRect decorationRect;
|
|
if (!(GetStateBits() & NS_FRAME_SELECTED_CONTENT) ||
|
|
!CombineSelectionUnderlineRect(aPresContext, *aVisualOverflowRect))
|
|
return;
|
|
AddStateBits(TEXT_SELECTION_UNDERLINE_OVERFLOWED);
|
|
}
|
|
|
|
void
|
|
nsTextFrame::PaintTextDecorations(gfxContext* aCtx, const gfxRect& aDirtyRect,
|
|
const gfxPoint& aFramePt,
|
|
const gfxPoint& aTextBaselinePt,
|
|
nsTextPaintStyle& aTextPaintStyle,
|
|
PropertyProvider& aProvider,
|
|
const nscolor* aOverrideColor)
|
|
{
|
|
TextDecorations decorations =
|
|
GetTextDecorations(aTextPaintStyle.PresContext());
|
|
if (!decorations.HasDecorationlines())
|
|
return;
|
|
|
|
// Hide text decorations if we're currently hiding @font-face fallback text
|
|
if (aProvider.GetFontGroup()->ShouldSkipDrawing())
|
|
return;
|
|
|
|
gfxFont* firstFont = aProvider.GetFontGroup()->GetFontAt(0);
|
|
if (!firstFont)
|
|
return; // OOM
|
|
const gfxFont::Metrics& fontMetrics = firstFont->GetMetrics();
|
|
gfxFloat app = aTextPaintStyle.PresContext()->AppUnitsPerDevPixel();
|
|
|
|
// XXX aFramePt is in AppUnits, shouldn't it be nsFloatPoint?
|
|
gfxPoint pt(aFramePt.x / app, (aTextBaselinePt.y - mAscent) / app);
|
|
gfxSize size(GetRect().width / app, 0);
|
|
gfxFloat ascent = gfxFloat(mAscent) / app;
|
|
|
|
nscolor lineColor;
|
|
if (decorations.HasOverline()) {
|
|
lineColor = aOverrideColor ? *aOverrideColor : decorations.mOverColor;
|
|
size.height = fontMetrics.underlineSize;
|
|
nsCSSRendering::PaintDecorationLine(
|
|
aCtx, lineColor, pt, size, ascent, fontMetrics.maxAscent,
|
|
NS_STYLE_TEXT_DECORATION_LINE_OVERLINE, decorations.mOverStyle);
|
|
}
|
|
if (decorations.HasUnderline()) {
|
|
lineColor = aOverrideColor ? *aOverrideColor : decorations.mUnderColor;
|
|
size.height = fontMetrics.underlineSize;
|
|
gfxFloat offset = aProvider.GetFontGroup()->GetUnderlineOffset();
|
|
nsCSSRendering::PaintDecorationLine(
|
|
aCtx, lineColor, pt, size, ascent, offset,
|
|
NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE, decorations.mUnderStyle);
|
|
}
|
|
if (decorations.HasStrikeout()) {
|
|
lineColor = aOverrideColor ? *aOverrideColor : decorations.mStrikeColor;
|
|
size.height = fontMetrics.strikeoutSize;
|
|
gfxFloat offset = fontMetrics.strikeoutOffset;
|
|
nsCSSRendering::PaintDecorationLine(
|
|
aCtx, lineColor, pt, size, ascent, offset,
|
|
NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH, decorations.mStrikeStyle);
|
|
}
|
|
}
|
|
|
|
static gfxFloat
|
|
ComputeDescentLimitForSelectionUnderline(nsPresContext* aPresContext,
|
|
nsTextFrame* aFrame,
|
|
const gfxFont::Metrics& aFontMetrics)
|
|
{
|
|
gfxFloat app = aPresContext->AppUnitsPerDevPixel();
|
|
nscoord lineHeightApp =
|
|
nsHTMLReflowState::CalcLineHeight(aFrame->GetStyleContext(), NS_AUTOHEIGHT);
|
|
gfxFloat lineHeight = gfxFloat(lineHeightApp) / app;
|
|
if (lineHeight <= aFontMetrics.maxHeight) {
|
|
return aFontMetrics.maxDescent;
|
|
}
|
|
return aFontMetrics.maxDescent + (lineHeight - aFontMetrics.maxHeight) / 2;
|
|
}
|
|
|
|
|
|
// Make sure this stays in sync with DrawSelectionDecorations below
|
|
static const SelectionType SelectionTypesWithDecorations =
|
|
nsISelectionController::SELECTION_SPELLCHECK |
|
|
nsISelectionController::SELECTION_IME_RAWINPUT |
|
|
nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT |
|
|
nsISelectionController::SELECTION_IME_CONVERTEDTEXT |
|
|
nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT;
|
|
|
|
static gfxFloat
|
|
ComputeSelectionUnderlineHeight(nsPresContext* aPresContext,
|
|
const gfxFont::Metrics& aFontMetrics,
|
|
SelectionType aSelectionType)
|
|
{
|
|
switch (aSelectionType) {
|
|
case nsISelectionController::SELECTION_IME_RAWINPUT:
|
|
case nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT:
|
|
case nsISelectionController::SELECTION_IME_CONVERTEDTEXT:
|
|
case nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT:
|
|
return aFontMetrics.underlineSize;
|
|
case nsISelectionController::SELECTION_SPELLCHECK: {
|
|
// The thickness of the spellchecker underline shouldn't honor the font
|
|
// metrics. It should be constant pixels value which is decided from the
|
|
// default font size. Note that if the actual font size is smaller than
|
|
// the default font size, we should use the actual font size because the
|
|
// computed value from the default font size can be too thick for the
|
|
// current font size.
|
|
PRInt32 defaultFontSize =
|
|
aPresContext->AppUnitsToDevPixels(nsStyleFont(aPresContext).mFont.size);
|
|
gfxFloat fontSize = NS_MIN(gfxFloat(defaultFontSize),
|
|
aFontMetrics.emHeight);
|
|
fontSize = NS_MAX(fontSize, 1.0);
|
|
return NS_ceil(fontSize / 20);
|
|
}
|
|
default:
|
|
NS_WARNING("Requested underline style is not valid");
|
|
return aFontMetrics.underlineSize;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This, plus SelectionTypesWithDecorations, encapsulates all knowledge about
|
|
* drawing text decoration for selections.
|
|
*/
|
|
static void DrawSelectionDecorations(gfxContext* aContext, SelectionType aType,
|
|
nsTextFrame* aFrame,
|
|
nsTextPaintStyle& aTextPaintStyle,
|
|
const nsTextRangeStyle &aRangeStyle,
|
|
const gfxPoint& aPt, gfxFloat aWidth,
|
|
gfxFloat aAscent, const gfxFont::Metrics& aFontMetrics)
|
|
{
|
|
gfxPoint pt(aPt);
|
|
gfxSize size(aWidth,
|
|
ComputeSelectionUnderlineHeight(aTextPaintStyle.PresContext(),
|
|
aFontMetrics, aType));
|
|
gfxFloat descentLimit =
|
|
ComputeDescentLimitForSelectionUnderline(aTextPaintStyle.PresContext(),
|
|
aFrame, aFontMetrics);
|
|
|
|
float relativeSize;
|
|
PRUint8 style;
|
|
nscolor color;
|
|
PRInt32 index =
|
|
nsTextPaintStyle::GetUnderlineStyleIndexForSelectionType(aType);
|
|
PRBool weDefineSelectionUnderline =
|
|
aTextPaintStyle.GetSelectionUnderlineForPaint(index, &color,
|
|
&relativeSize, &style);
|
|
|
|
switch (aType) {
|
|
case nsISelectionController::SELECTION_IME_RAWINPUT:
|
|
case nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT:
|
|
case nsISelectionController::SELECTION_IME_CONVERTEDTEXT:
|
|
case nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT: {
|
|
// IME decoration lines should not be drawn on the both ends, i.e., we
|
|
// need to cut both edges of the decoration lines. Because same style
|
|
// IME selections can adjoin, but the users need to be able to know
|
|
// where are the boundaries of the selections.
|
|
//
|
|
// X: underline
|
|
//
|
|
// IME selection #1 IME selection #2 IME selection #3
|
|
// | | |
|
|
// | XXXXXXXXXXXXXXXXXXX | XXXXXXXXXXXXXXXXXXXX | XXXXXXXXXXXXXXXXXXX
|
|
// +---------------------+----------------------+--------------------
|
|
// ^ ^ ^ ^ ^
|
|
// gap gap gap
|
|
pt.x += 1.0;
|
|
size.width -= 2.0;
|
|
if (aRangeStyle.IsDefined()) {
|
|
// If IME defines the style, that should override our definition.
|
|
if (aRangeStyle.IsLineStyleDefined()) {
|
|
if (aRangeStyle.mLineStyle == nsTextRangeStyle::LINESTYLE_NONE) {
|
|
return;
|
|
}
|
|
style = aRangeStyle.mLineStyle;
|
|
relativeSize = aRangeStyle.mIsBoldLine ? 2.0f : 1.0f;
|
|
} else if (!weDefineSelectionUnderline) {
|
|
// There is no underline style definition.
|
|
return;
|
|
}
|
|
if (aRangeStyle.IsUnderlineColorDefined()) {
|
|
color = aRangeStyle.mUnderlineColor;
|
|
} else if (aRangeStyle.IsForegroundColorDefined()) {
|
|
color = aRangeStyle.mForegroundColor;
|
|
} else {
|
|
NS_ASSERTION(!aRangeStyle.IsBackgroundColorDefined(),
|
|
"Only the background color is defined");
|
|
color = aTextPaintStyle.GetTextColor();
|
|
}
|
|
} else if (!weDefineSelectionUnderline) {
|
|
// IME doesn't specify the selection style and we don't define selection
|
|
// underline.
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
case nsISelectionController::SELECTION_SPELLCHECK:
|
|
if (!weDefineSelectionUnderline)
|
|
return;
|
|
break;
|
|
default:
|
|
NS_WARNING("Requested selection decorations when there aren't any");
|
|
return;
|
|
}
|
|
size.height *= relativeSize;
|
|
nsCSSRendering::PaintDecorationLine(
|
|
aContext, color, pt, size, aAscent, aFontMetrics.underlineOffset,
|
|
NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE, style, descentLimit);
|
|
}
|
|
|
|
/**
|
|
* This function encapsulates all knowledge of how selections affect foreground
|
|
* and background colors.
|
|
* @return true if the selection affects colors, false otherwise
|
|
* @param aForeground the foreground color to use
|
|
* @param aBackground the background color to use, or RGBA(0,0,0,0) if no
|
|
* background should be painted
|
|
*/
|
|
static PRBool GetSelectionTextColors(SelectionType aType,
|
|
nsTextPaintStyle& aTextPaintStyle,
|
|
const nsTextRangeStyle &aRangeStyle,
|
|
nscolor* aForeground, nscolor* aBackground)
|
|
{
|
|
switch (aType) {
|
|
case nsISelectionController::SELECTION_NORMAL:
|
|
return aTextPaintStyle.GetSelectionColors(aForeground, aBackground);
|
|
case nsISelectionController::SELECTION_FIND:
|
|
aTextPaintStyle.GetHighlightColors(aForeground, aBackground);
|
|
return PR_TRUE;
|
|
case nsISelectionController::SELECTION_URLSECONDARY:
|
|
aTextPaintStyle.GetURLSecondaryColor(aForeground);
|
|
*aBackground = NS_RGBA(0,0,0,0);
|
|
return PR_TRUE;
|
|
case nsISelectionController::SELECTION_IME_RAWINPUT:
|
|
case nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT:
|
|
case nsISelectionController::SELECTION_IME_CONVERTEDTEXT:
|
|
case nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT:
|
|
if (aRangeStyle.IsDefined()) {
|
|
*aForeground = aTextPaintStyle.GetTextColor();
|
|
*aBackground = NS_RGBA(0,0,0,0);
|
|
if (!aRangeStyle.IsForegroundColorDefined() &&
|
|
!aRangeStyle.IsBackgroundColorDefined()) {
|
|
return PR_FALSE;
|
|
}
|
|
if (aRangeStyle.IsForegroundColorDefined()) {
|
|
*aForeground = aRangeStyle.mForegroundColor;
|
|
}
|
|
if (aRangeStyle.IsBackgroundColorDefined()) {
|
|
*aBackground = aRangeStyle.mBackgroundColor;
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
aTextPaintStyle.GetIMESelectionColors(
|
|
nsTextPaintStyle::GetUnderlineStyleIndexForSelectionType(aType),
|
|
aForeground, aBackground);
|
|
return PR_TRUE;
|
|
default:
|
|
*aForeground = aTextPaintStyle.GetTextColor();
|
|
*aBackground = NS_RGBA(0,0,0,0);
|
|
return PR_FALSE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This class lets us iterate over chunks of text in a uniform selection state,
|
|
* observing cluster boundaries, in content order, maintaining the current
|
|
* x-offset as we go, and telling whether the text chunk has a hyphen after
|
|
* it or not. The caller is responsible for actually computing the advance
|
|
* width of each chunk.
|
|
*/
|
|
class SelectionIterator {
|
|
public:
|
|
/**
|
|
* aStart and aLength are in the original string. aSelectionDetails is
|
|
* according to the original string.
|
|
*/
|
|
SelectionIterator(SelectionDetails** aSelectionDetails,
|
|
PRInt32 aStart, PRInt32 aLength,
|
|
PropertyProvider& aProvider, gfxTextRun* aTextRun);
|
|
|
|
/**
|
|
* Returns the next segment of uniformly selected (or not) text.
|
|
* @param aXOffset the offset from the origin of the frame to the start
|
|
* of the text (the left baseline origin for LTR, the right baseline origin
|
|
* for RTL)
|
|
* @param aOffset the transformed string offset of the text for this segment
|
|
* @param aLength the transformed string length of the text for this segment
|
|
* @param aHyphenWidth if a hyphen is to be rendered after the text, the
|
|
* width of the hyphen, otherwise zero
|
|
* @param aType the selection type for this segment
|
|
* @param aStyle the selection style for this segment
|
|
* @return false if there are no more segments
|
|
*/
|
|
PRBool GetNextSegment(gfxFloat* aXOffset, PRUint32* aOffset, PRUint32* aLength,
|
|
gfxFloat* aHyphenWidth, SelectionType* aType,
|
|
nsTextRangeStyle* aStyle);
|
|
void UpdateWithAdvance(gfxFloat aAdvance) {
|
|
mXOffset += aAdvance*mTextRun->GetDirection();
|
|
}
|
|
|
|
private:
|
|
SelectionDetails** mSelectionDetails;
|
|
PropertyProvider& mProvider;
|
|
gfxTextRun* mTextRun;
|
|
gfxSkipCharsIterator mIterator;
|
|
PRInt32 mOriginalStart;
|
|
PRInt32 mOriginalEnd;
|
|
gfxFloat mXOffset;
|
|
};
|
|
|
|
SelectionIterator::SelectionIterator(SelectionDetails** aSelectionDetails,
|
|
PRInt32 aStart, PRInt32 aLength, PropertyProvider& aProvider,
|
|
gfxTextRun* aTextRun)
|
|
: mSelectionDetails(aSelectionDetails), mProvider(aProvider),
|
|
mTextRun(aTextRun), mIterator(aProvider.GetStart()),
|
|
mOriginalStart(aStart), mOriginalEnd(aStart + aLength),
|
|
mXOffset(mTextRun->IsRightToLeft() ? aProvider.GetFrame()->GetSize().width : 0)
|
|
{
|
|
mIterator.SetOriginalOffset(aStart);
|
|
}
|
|
|
|
PRBool SelectionIterator::GetNextSegment(gfxFloat* aXOffset,
|
|
PRUint32* aOffset, PRUint32* aLength, gfxFloat* aHyphenWidth,
|
|
SelectionType* aType, nsTextRangeStyle* aStyle)
|
|
{
|
|
if (mIterator.GetOriginalOffset() >= mOriginalEnd)
|
|
return PR_FALSE;
|
|
|
|
// save offset into transformed string now
|
|
PRUint32 runOffset = mIterator.GetSkippedOffset();
|
|
|
|
PRInt32 index = mIterator.GetOriginalOffset() - mOriginalStart;
|
|
SelectionDetails* sdptr = mSelectionDetails[index];
|
|
SelectionType type =
|
|
sdptr ? sdptr->mType : nsISelectionController::SELECTION_NONE;
|
|
nsTextRangeStyle style;
|
|
if (sdptr) {
|
|
style = sdptr->mTextRangeStyle;
|
|
}
|
|
for (++index; mOriginalStart + index < mOriginalEnd; ++index) {
|
|
if (sdptr != mSelectionDetails[index])
|
|
break;
|
|
}
|
|
mIterator.SetOriginalOffset(index + mOriginalStart);
|
|
|
|
// Advance to the next cluster boundary
|
|
while (mIterator.GetOriginalOffset() < mOriginalEnd &&
|
|
!mIterator.IsOriginalCharSkipped() &&
|
|
!mTextRun->IsClusterStart(mIterator.GetSkippedOffset())) {
|
|
mIterator.AdvanceOriginal(1);
|
|
}
|
|
|
|
PRBool haveHyphenBreak =
|
|
(mProvider.GetFrame()->GetStateBits() & TEXT_HYPHEN_BREAK) != 0;
|
|
*aOffset = runOffset;
|
|
*aLength = mIterator.GetSkippedOffset() - runOffset;
|
|
*aXOffset = mXOffset;
|
|
*aHyphenWidth = 0;
|
|
if (mIterator.GetOriginalOffset() == mOriginalEnd && haveHyphenBreak) {
|
|
*aHyphenWidth = mProvider.GetHyphenWidth();
|
|
}
|
|
*aType = type;
|
|
*aStyle = style;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
static void
|
|
AddHyphenToMetrics(nsTextFrame* aTextFrame, gfxTextRun* aBaseTextRun,
|
|
gfxTextRun::Metrics* aMetrics,
|
|
gfxFont::BoundingBoxType aBoundingBoxType,
|
|
gfxContext* aContext)
|
|
{
|
|
// Fix up metrics to include hyphen
|
|
gfxTextRunCache::AutoTextRun hyphenTextRun(
|
|
GetHyphenTextRun(aBaseTextRun, aContext, aTextFrame));
|
|
if (!hyphenTextRun.get())
|
|
return;
|
|
|
|
gfxTextRun::Metrics hyphenMetrics =
|
|
hyphenTextRun->MeasureText(0, hyphenTextRun->GetLength(),
|
|
aBoundingBoxType, aContext, nsnull);
|
|
aMetrics->CombineWith(hyphenMetrics, aBaseTextRun->IsRightToLeft());
|
|
}
|
|
|
|
void
|
|
nsTextFrame::PaintOneShadow(PRUint32 aOffset, PRUint32 aLength,
|
|
nsCSSShadowItem* aShadowDetails,
|
|
PropertyProvider* aProvider, const nsRect& aDirtyRect,
|
|
const gfxPoint& aFramePt, const gfxPoint& aTextBaselinePt,
|
|
gfxContext* aCtx, const nscolor& aForegroundColor)
|
|
{
|
|
gfxPoint shadowOffset(aShadowDetails->mXOffset, aShadowDetails->mYOffset);
|
|
nscoord blurRadius = NS_MAX(aShadowDetails->mRadius, 0);
|
|
|
|
gfxTextRun::Metrics shadowMetrics =
|
|
mTextRun->MeasureText(aOffset, aLength, gfxFont::LOOSE_INK_EXTENTS,
|
|
nsnull, aProvider);
|
|
if (GetStateBits() & TEXT_HYPHEN_BREAK) {
|
|
AddHyphenToMetrics(this, mTextRun, &shadowMetrics, gfxFont::LOOSE_INK_EXTENTS, aCtx);
|
|
}
|
|
|
|
// This rect is the box which is equivalent to where the shadow will be painted.
|
|
// The origin of mBoundingBox is the text baseline left, so we must translate it by
|
|
// that much in order to make the origin the top-left corner of the text bounding box.
|
|
gfxRect shadowGfxRect = shadowMetrics.mBoundingBox +
|
|
gfxPoint(aFramePt.x, aTextBaselinePt.y) + shadowOffset;
|
|
nsRect shadowRect(shadowGfxRect.X(), shadowGfxRect.Y(),
|
|
shadowGfxRect.Width(), shadowGfxRect.Height());
|
|
|
|
nsContextBoxBlur contextBoxBlur;
|
|
gfxContext* shadowContext = contextBoxBlur.Init(shadowRect, 0, blurRadius,
|
|
PresContext()->AppUnitsPerDevPixel(),
|
|
aCtx, aDirtyRect, nsnull);
|
|
if (!shadowContext)
|
|
return;
|
|
|
|
nscolor shadowColor;
|
|
if (aShadowDetails->mHasColor)
|
|
shadowColor = aShadowDetails->mColor;
|
|
else
|
|
shadowColor = aForegroundColor;
|
|
|
|
aCtx->Save();
|
|
aCtx->NewPath();
|
|
aCtx->SetColor(gfxRGBA(shadowColor));
|
|
|
|
// Draw the text onto our alpha-only surface to capture the alpha values.
|
|
// Remember that the box blur context has a device offset on it, so we don't need to
|
|
// translate any coordinates to fit on the surface.
|
|
gfxRect dirtyGfxRect(aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height);
|
|
gfxFloat advanceWidth;
|
|
DrawText(shadowContext,
|
|
aTextBaselinePt + shadowOffset,
|
|
aOffset, aLength, &dirtyGfxRect, aProvider, advanceWidth,
|
|
(GetStateBits() & TEXT_HYPHEN_BREAK) != 0);
|
|
|
|
// This will only have an effect in quirks mode. Standards mode text-decoration shadow painting
|
|
// is handled in nsHTMLContainerFrame.cpp, so you must remember to consider that if you change
|
|
// any code behaviour here.
|
|
nsTextPaintStyle textPaintStyle(this);
|
|
PaintTextDecorations(shadowContext, dirtyGfxRect, aFramePt + shadowOffset,
|
|
aTextBaselinePt + shadowOffset,
|
|
textPaintStyle, *aProvider, &shadowColor);
|
|
|
|
contextBoxBlur.DoPaint();
|
|
aCtx->Restore();
|
|
}
|
|
|
|
// Paints selection backgrounds and text in the correct colors. Also computes
|
|
// aAllTypes, the union of all selection types that are applying to this text.
|
|
void
|
|
nsTextFrame::PaintTextWithSelectionColors(gfxContext* aCtx,
|
|
const gfxPoint& aFramePt,
|
|
const gfxPoint& aTextBaselinePt, const gfxRect& aDirtyRect,
|
|
PropertyProvider& aProvider, nsTextPaintStyle& aTextPaintStyle,
|
|
SelectionDetails* aDetails, SelectionType* aAllTypes)
|
|
{
|
|
PRInt32 contentOffset = aProvider.GetStart().GetOriginalOffset();
|
|
PRInt32 contentLength = aProvider.GetOriginalLength();
|
|
|
|
// Figure out which selections control the colors to use for each character.
|
|
nsAutoTArray<SelectionDetails*,BIG_TEXT_NODE_SIZE> prevailingSelectionsBuffer;
|
|
if (!prevailingSelectionsBuffer.AppendElements(contentLength))
|
|
return;
|
|
SelectionDetails** prevailingSelections = prevailingSelectionsBuffer.Elements();
|
|
|
|
PRInt32 i;
|
|
SelectionType allTypes = 0;
|
|
for (i = 0; i < contentLength; ++i) {
|
|
prevailingSelections[i] = nsnull;
|
|
}
|
|
|
|
SelectionDetails *sdptr = aDetails;
|
|
PRBool anyBackgrounds = PR_FALSE;
|
|
while (sdptr) {
|
|
PRInt32 start = NS_MAX(0, sdptr->mStart - contentOffset);
|
|
PRInt32 end = NS_MIN(contentLength, sdptr->mEnd - contentOffset);
|
|
SelectionType type = sdptr->mType;
|
|
if (start < end) {
|
|
allTypes |= type;
|
|
// Ignore selections that don't set colors
|
|
nscolor foreground, background;
|
|
if (GetSelectionTextColors(type, aTextPaintStyle, sdptr->mTextRangeStyle,
|
|
&foreground, &background)) {
|
|
if (NS_GET_A(background) > 0) {
|
|
anyBackgrounds = PR_TRUE;
|
|
}
|
|
for (i = start; i < end; ++i) {
|
|
// Favour normal selection over IME selections
|
|
if (!prevailingSelections[i] ||
|
|
type < prevailingSelections[i]->mType) {
|
|
prevailingSelections[i] = sdptr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
sdptr = sdptr->mNext;
|
|
}
|
|
*aAllTypes = allTypes;
|
|
|
|
gfxFloat xOffset, hyphenWidth;
|
|
PRUint32 offset, length; // in transformed string
|
|
SelectionType type;
|
|
nsTextRangeStyle rangeStyle;
|
|
// Draw background colors
|
|
if (anyBackgrounds) {
|
|
SelectionIterator iterator(prevailingSelections, contentOffset, contentLength,
|
|
aProvider, mTextRun);
|
|
while (iterator.GetNextSegment(&xOffset, &offset, &length, &hyphenWidth,
|
|
&type, &rangeStyle)) {
|
|
nscolor foreground, background;
|
|
GetSelectionTextColors(type, aTextPaintStyle, rangeStyle,
|
|
&foreground, &background);
|
|
// Draw background color
|
|
gfxFloat advance = hyphenWidth +
|
|
mTextRun->GetAdvanceWidth(offset, length, &aProvider);
|
|
if (NS_GET_A(background) > 0) {
|
|
gfxFloat x = xOffset - (mTextRun->IsRightToLeft() ? advance : 0);
|
|
FillClippedRect(aCtx, aTextPaintStyle.PresContext(),
|
|
background, aDirtyRect,
|
|
gfxRect(aFramePt.x + x, aFramePt.y, advance, GetSize().height));
|
|
}
|
|
iterator.UpdateWithAdvance(advance);
|
|
}
|
|
}
|
|
|
|
// Draw text
|
|
SelectionIterator iterator(prevailingSelections, contentOffset, contentLength,
|
|
aProvider, mTextRun);
|
|
while (iterator.GetNextSegment(&xOffset, &offset, &length, &hyphenWidth,
|
|
&type, &rangeStyle)) {
|
|
nscolor foreground, background;
|
|
GetSelectionTextColors(type, aTextPaintStyle, rangeStyle,
|
|
&foreground, &background);
|
|
// Draw text segment
|
|
aCtx->SetColor(gfxRGBA(foreground));
|
|
gfxFloat advance;
|
|
|
|
DrawText(aCtx, gfxPoint(aFramePt.x + xOffset, aTextBaselinePt.y),
|
|
offset, length, &aDirtyRect, &aProvider,
|
|
advance, hyphenWidth > 0);
|
|
if (hyphenWidth) {
|
|
advance += hyphenWidth;
|
|
}
|
|
iterator.UpdateWithAdvance(advance);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsTextFrame::PaintTextSelectionDecorations(gfxContext* aCtx,
|
|
const gfxPoint& aFramePt,
|
|
const gfxPoint& aTextBaselinePt, const gfxRect& aDirtyRect,
|
|
PropertyProvider& aProvider, nsTextPaintStyle& aTextPaintStyle,
|
|
SelectionDetails* aDetails, SelectionType aSelectionType)
|
|
{
|
|
// Hide text decorations if we're currently hiding @font-face fallback text
|
|
if (aProvider.GetFontGroup()->ShouldSkipDrawing())
|
|
return;
|
|
|
|
PRInt32 contentOffset = aProvider.GetStart().GetOriginalOffset();
|
|
PRInt32 contentLength = aProvider.GetOriginalLength();
|
|
|
|
// Figure out which characters will be decorated for this selection.
|
|
nsAutoTArray<SelectionDetails*, BIG_TEXT_NODE_SIZE> selectedCharsBuffer;
|
|
if (!selectedCharsBuffer.AppendElements(contentLength))
|
|
return;
|
|
SelectionDetails** selectedChars = selectedCharsBuffer.Elements();
|
|
PRInt32 i;
|
|
for (i = 0; i < contentLength; ++i) {
|
|
selectedChars[i] = nsnull;
|
|
}
|
|
|
|
SelectionDetails *sdptr = aDetails;
|
|
while (sdptr) {
|
|
if (sdptr->mType == aSelectionType) {
|
|
PRInt32 start = NS_MAX(0, sdptr->mStart - contentOffset);
|
|
PRInt32 end = NS_MIN(contentLength, sdptr->mEnd - contentOffset);
|
|
for (i = start; i < end; ++i) {
|
|
selectedChars[i] = sdptr;
|
|
}
|
|
}
|
|
sdptr = sdptr->mNext;
|
|
}
|
|
|
|
gfxFont* firstFont = aProvider.GetFontGroup()->GetFontAt(0);
|
|
if (!firstFont)
|
|
return; // OOM
|
|
gfxFont::Metrics decorationMetrics(firstFont->GetMetrics());
|
|
decorationMetrics.underlineOffset =
|
|
aProvider.GetFontGroup()->GetUnderlineOffset();
|
|
|
|
SelectionIterator iterator(selectedChars, contentOffset, contentLength,
|
|
aProvider, mTextRun);
|
|
gfxFloat xOffset, hyphenWidth;
|
|
PRUint32 offset, length;
|
|
PRInt32 app = aTextPaintStyle.PresContext()->AppUnitsPerDevPixel();
|
|
// XXX aTextBaselinePt is in AppUnits, shouldn't it be nsFloatPoint?
|
|
gfxPoint pt(0.0, (aTextBaselinePt.y - mAscent) / app);
|
|
SelectionType type;
|
|
nsTextRangeStyle selectedStyle;
|
|
while (iterator.GetNextSegment(&xOffset, &offset, &length, &hyphenWidth,
|
|
&type, &selectedStyle)) {
|
|
gfxFloat advance = hyphenWidth +
|
|
mTextRun->GetAdvanceWidth(offset, length, &aProvider);
|
|
if (type == aSelectionType) {
|
|
pt.x = (aFramePt.x + xOffset -
|
|
(mTextRun->IsRightToLeft() ? advance : 0)) / app;
|
|
gfxFloat width = PR_ABS(advance) / app;
|
|
DrawSelectionDecorations(aCtx, aSelectionType, this, aTextPaintStyle,
|
|
selectedStyle,
|
|
pt, width, mAscent / app, decorationMetrics);
|
|
}
|
|
iterator.UpdateWithAdvance(advance);
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::PaintTextWithSelection(gfxContext* aCtx,
|
|
const gfxPoint& aFramePt,
|
|
const gfxPoint& aTextBaselinePt, const gfxRect& aDirtyRect,
|
|
PropertyProvider& aProvider, nsTextPaintStyle& aTextPaintStyle)
|
|
{
|
|
SelectionDetails* details = GetSelectionDetails();
|
|
if (!details)
|
|
return PR_FALSE;
|
|
|
|
SelectionType allTypes;
|
|
PaintTextWithSelectionColors(aCtx, aFramePt, aTextBaselinePt, aDirtyRect,
|
|
aProvider, aTextPaintStyle, details, &allTypes);
|
|
PaintTextDecorations(aCtx, aDirtyRect, aFramePt, aTextBaselinePt,
|
|
aTextPaintStyle, aProvider);
|
|
PRInt32 i;
|
|
// Iterate through just the selection types that paint decorations and
|
|
// paint decorations for any that actually occur in this frame. Paint
|
|
// higher-numbered selection types below lower-numered ones on the
|
|
// general principal that lower-numbered selections are higher priority.
|
|
allTypes &= SelectionTypesWithDecorations;
|
|
for (i = nsISelectionController::NUM_SELECTIONTYPES - 1; i >= 1; --i) {
|
|
SelectionType type = 1 << (i - 1);
|
|
if (allTypes & type) {
|
|
// There is some selection of this type. Try to paint its decorations
|
|
// (there might not be any for this type but that's OK,
|
|
// PaintTextSelectionDecorations will exit early).
|
|
PaintTextSelectionDecorations(aCtx, aFramePt, aTextBaselinePt, aDirtyRect,
|
|
aProvider, aTextPaintStyle, details, type);
|
|
}
|
|
}
|
|
|
|
DestroySelectionDetails(details);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
nscolor
|
|
nsTextFrame::GetCaretColorAt(PRInt32 aOffset)
|
|
{
|
|
NS_PRECONDITION(aOffset >= 0, "aOffset must be positive");
|
|
|
|
gfxSkipCharsIterator iter = EnsureTextRun();
|
|
PropertyProvider provider(this, iter);
|
|
PRInt32 contentOffset = provider.GetStart().GetOriginalOffset();
|
|
PRInt32 contentLength = provider.GetOriginalLength();
|
|
NS_PRECONDITION(aOffset >= contentOffset &&
|
|
aOffset <= contentOffset + contentLength,
|
|
"aOffset must be in the frame's range");
|
|
PRInt32 offsetInFrame = aOffset - contentOffset;
|
|
if (offsetInFrame < 0 || offsetInFrame >= contentLength) {
|
|
return nsFrame::GetCaretColorAt(aOffset);
|
|
}
|
|
|
|
nsTextPaintStyle textPaintStyle(this);
|
|
SelectionDetails* details = GetSelectionDetails();
|
|
SelectionDetails* sdptr = details;
|
|
nscolor result = nsFrame::GetCaretColorAt(aOffset);
|
|
SelectionType type = 0;
|
|
while (sdptr) {
|
|
PRInt32 start = NS_MAX(0, sdptr->mStart - contentOffset);
|
|
PRInt32 end = NS_MIN(contentLength, sdptr->mEnd - contentOffset);
|
|
if (start <= offsetInFrame && offsetInFrame < end &&
|
|
(type == 0 || sdptr->mType < type)) {
|
|
nscolor foreground, background;
|
|
if (GetSelectionTextColors(sdptr->mType, textPaintStyle,
|
|
sdptr->mTextRangeStyle,
|
|
&foreground, &background)) {
|
|
result = foreground;
|
|
type = sdptr->mType;
|
|
}
|
|
}
|
|
sdptr = sdptr->mNext;
|
|
}
|
|
|
|
DestroySelectionDetails(details);
|
|
return result;
|
|
}
|
|
|
|
static PRUint32
|
|
ComputeTransformedLength(PropertyProvider& aProvider)
|
|
{
|
|
gfxSkipCharsIterator iter(aProvider.GetStart());
|
|
PRUint32 start = iter.GetSkippedOffset();
|
|
iter.AdvanceOriginal(aProvider.GetOriginalLength());
|
|
return iter.GetSkippedOffset() - start;
|
|
}
|
|
|
|
gfxFloat
|
|
nsTextFrame::GetSnappedBaselineY(gfxContext* aContext, gfxFloat aY)
|
|
{
|
|
gfxFloat appUnitsPerDevUnit = mTextRun->GetAppUnitsPerDevUnit();
|
|
gfxFloat baseline = aY + mAscent;
|
|
gfxRect putativeRect(0, baseline/appUnitsPerDevUnit, 1, 1);
|
|
if (!aContext->UserToDevicePixelSnapped(putativeRect))
|
|
return baseline;
|
|
return aContext->DeviceToUser(putativeRect.TopLeft()).y*appUnitsPerDevUnit;
|
|
}
|
|
|
|
void
|
|
nsTextFrame::PaintText(nsRenderingContext* aRenderingContext, nsPoint aPt,
|
|
const nsRect& aDirtyRect)
|
|
{
|
|
// Don't pass in aRenderingContext here, because we need a *reference*
|
|
// context and aRenderingContext might have some transform in it
|
|
// XXX get the block and line passed to us somehow! This is slow!
|
|
gfxSkipCharsIterator iter = EnsureTextRun();
|
|
if (!mTextRun)
|
|
return;
|
|
|
|
nsTextPaintStyle textPaintStyle(this);
|
|
PropertyProvider provider(this, iter);
|
|
// Trim trailing whitespace
|
|
provider.InitializeForDisplay(PR_TRUE);
|
|
|
|
gfxContext* ctx = aRenderingContext->ThebesContext();
|
|
|
|
gfxPoint framePt(aPt.x, aPt.y);
|
|
gfxPoint textBaselinePt(
|
|
mTextRun->IsRightToLeft() ? gfxFloat(aPt.x + GetSize().width) : framePt.x,
|
|
GetSnappedBaselineY(ctx, aPt.y));
|
|
|
|
gfxRect dirtyRect(aDirtyRect.x, aDirtyRect.y,
|
|
aDirtyRect.width, aDirtyRect.height);
|
|
|
|
gfxFloat advanceWidth;
|
|
gfxRGBA foregroundColor = gfxRGBA(textPaintStyle.GetTextColor());
|
|
|
|
// Paint the text shadow before doing any foreground stuff
|
|
const nsStyleText* textStyle = GetStyleText();
|
|
if (textStyle->mTextShadow) {
|
|
// Text shadow happens with the last value being painted at the back,
|
|
// ie. it is painted first.
|
|
for (PRUint32 i = textStyle->mTextShadow->Length(); i > 0; --i) {
|
|
PaintOneShadow(provider.GetStart().GetSkippedOffset(),
|
|
ComputeTransformedLength(provider),
|
|
textStyle->mTextShadow->ShadowAt(i - 1), &provider,
|
|
aDirtyRect, framePt, textBaselinePt, ctx,
|
|
textPaintStyle.GetTextColor());
|
|
}
|
|
}
|
|
|
|
// Fork off to the (slower) paint-with-selection path if necessary.
|
|
if (nsLayoutUtils::GetNonGeneratedAncestor(this)->GetStateBits() & NS_FRAME_SELECTED_CONTENT) {
|
|
if (PaintTextWithSelection(ctx, framePt, textBaselinePt,
|
|
dirtyRect, provider, textPaintStyle))
|
|
return;
|
|
}
|
|
|
|
ctx->SetColor(foregroundColor);
|
|
|
|
DrawText(ctx, textBaselinePt, provider.GetStart().GetSkippedOffset(),
|
|
ComputeTransformedLength(provider), &dirtyRect,
|
|
&provider, advanceWidth,
|
|
(GetStateBits() & TEXT_HYPHEN_BREAK) != 0);
|
|
PaintTextDecorations(ctx, dirtyRect, framePt, textBaselinePt,
|
|
textPaintStyle, provider);
|
|
}
|
|
|
|
void
|
|
nsTextFrame::DrawText(gfxContext* aCtx, const gfxPoint& aTextBaselinePt,
|
|
PRUint32 aOffset, PRUint32 aLength,
|
|
const gfxRect* aDirtyRect, PropertyProvider* aProvider,
|
|
gfxFloat& aAdvanceWidth, PRBool aDrawSoftHyphen)
|
|
{
|
|
// Paint the text and soft-hyphen (if any) onto the given graphics context
|
|
mTextRun->Draw(aCtx, aTextBaselinePt, aOffset, aLength,
|
|
aProvider, &aAdvanceWidth);
|
|
|
|
if (aDrawSoftHyphen) {
|
|
// Don't use ctx as the context, because we need a reference context here,
|
|
// ctx may be transformed.
|
|
gfxTextRunCache::AutoTextRun hyphenTextRun(GetHyphenTextRun(mTextRun, nsnull, this));
|
|
if (hyphenTextRun.get()) {
|
|
// For right-to-left text runs, the soft-hyphen is positioned at the left
|
|
// of the text, minus its own width
|
|
gfxFloat hyphenBaselineX = aTextBaselinePt.x + mTextRun->GetDirection() * aAdvanceWidth -
|
|
(mTextRun->IsRightToLeft() ? hyphenTextRun->GetAdvanceWidth(0, hyphenTextRun->GetLength(), nsnull) : 0);
|
|
hyphenTextRun->Draw(aCtx, gfxPoint(hyphenBaselineX, aTextBaselinePt.y),
|
|
0, hyphenTextRun->GetLength(), nsnull, nsnull);
|
|
}
|
|
}
|
|
}
|
|
|
|
PRInt16
|
|
nsTextFrame::GetSelectionStatus(PRInt16* aSelectionFlags)
|
|
{
|
|
// get the selection controller
|
|
nsCOMPtr<nsISelectionController> selectionController;
|
|
nsresult rv = GetSelectionController(PresContext(),
|
|
getter_AddRefs(selectionController));
|
|
if (NS_FAILED(rv) || !selectionController)
|
|
return nsISelectionController::SELECTION_OFF;
|
|
|
|
selectionController->GetSelectionFlags(aSelectionFlags);
|
|
|
|
PRInt16 selectionValue;
|
|
selectionController->GetDisplaySelection(&selectionValue);
|
|
|
|
return selectionValue;
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::IsVisibleInSelection(nsISelection* aSelection)
|
|
{
|
|
// Check the quick way first
|
|
PRBool isSelected = (mState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
|
|
if (!isSelected)
|
|
return PR_FALSE;
|
|
|
|
SelectionDetails* details = GetSelectionDetails();
|
|
PRBool found = PR_FALSE;
|
|
|
|
// where are the selection points "really"
|
|
SelectionDetails *sdptr = details;
|
|
while (sdptr) {
|
|
if (sdptr->mEnd > GetContentOffset() &&
|
|
sdptr->mStart < GetContentEnd() &&
|
|
sdptr->mType == nsISelectionController::SELECTION_NORMAL) {
|
|
found = PR_TRUE;
|
|
break;
|
|
}
|
|
sdptr = sdptr->mNext;
|
|
}
|
|
DestroySelectionDetails(details);
|
|
|
|
return found;
|
|
}
|
|
|
|
/**
|
|
* Compute the longest prefix of text whose width is <= aWidth. Return
|
|
* the length of the prefix. Also returns the width of the prefix in aFitWidth.
|
|
*/
|
|
static PRUint32
|
|
CountCharsFit(gfxTextRun* aTextRun, PRUint32 aStart, PRUint32 aLength,
|
|
gfxFloat aWidth, PropertyProvider* aProvider,
|
|
gfxFloat* aFitWidth)
|
|
{
|
|
PRUint32 last = 0;
|
|
gfxFloat width = 0;
|
|
PRUint32 i;
|
|
for (i = 1; i <= aLength; ++i) {
|
|
if (i == aLength || aTextRun->IsClusterStart(aStart + i)) {
|
|
gfxFloat nextWidth = width +
|
|
aTextRun->GetAdvanceWidth(aStart + last, i - last, aProvider);
|
|
if (nextWidth > aWidth)
|
|
break;
|
|
last = i;
|
|
width = nextWidth;
|
|
}
|
|
}
|
|
*aFitWidth = width;
|
|
return last;
|
|
}
|
|
|
|
nsIFrame::ContentOffsets
|
|
nsTextFrame::CalcContentOffsetsFromFramePoint(nsPoint aPoint)
|
|
{
|
|
return GetCharacterOffsetAtFramePointInternal(aPoint, PR_TRUE);
|
|
}
|
|
|
|
nsIFrame::ContentOffsets
|
|
nsTextFrame::GetCharacterOffsetAtFramePoint(const nsPoint &aPoint)
|
|
{
|
|
return GetCharacterOffsetAtFramePointInternal(aPoint, PR_FALSE);
|
|
}
|
|
|
|
nsIFrame::ContentOffsets
|
|
nsTextFrame::GetCharacterOffsetAtFramePointInternal(const nsPoint &aPoint,
|
|
PRBool aForInsertionPoint)
|
|
{
|
|
ContentOffsets offsets;
|
|
|
|
gfxSkipCharsIterator iter = EnsureTextRun();
|
|
if (!mTextRun)
|
|
return offsets;
|
|
|
|
PropertyProvider provider(this, iter);
|
|
// Trim leading but not trailing whitespace if possible
|
|
provider.InitializeForDisplay(PR_FALSE);
|
|
gfxFloat width = mTextRun->IsRightToLeft() ? mRect.width - aPoint.x : aPoint.x;
|
|
gfxFloat fitWidth;
|
|
PRUint32 skippedLength = ComputeTransformedLength(provider);
|
|
|
|
PRUint32 charsFit = CountCharsFit(mTextRun,
|
|
provider.GetStart().GetSkippedOffset(), skippedLength, width, &provider, &fitWidth);
|
|
|
|
PRInt32 selectedOffset;
|
|
if (charsFit < skippedLength) {
|
|
// charsFit characters fitted, but no more could fit. See if we're
|
|
// more than halfway through the cluster.. If we are, choose the next
|
|
// cluster.
|
|
gfxSkipCharsIterator extraCluster(provider.GetStart());
|
|
extraCluster.AdvanceSkipped(charsFit);
|
|
gfxSkipCharsIterator extraClusterLastChar(extraCluster);
|
|
FindClusterEnd(mTextRun,
|
|
provider.GetStart().GetOriginalOffset() + provider.GetOriginalLength(),
|
|
&extraClusterLastChar);
|
|
gfxFloat charWidth =
|
|
mTextRun->GetAdvanceWidth(extraCluster.GetSkippedOffset(),
|
|
GetSkippedDistance(extraCluster, extraClusterLastChar) + 1,
|
|
&provider);
|
|
selectedOffset = !aForInsertionPoint || width <= fitWidth + charWidth/2
|
|
? extraCluster.GetOriginalOffset()
|
|
: extraClusterLastChar.GetOriginalOffset() + 1;
|
|
} else {
|
|
// All characters fitted, we're at (or beyond) the end of the text.
|
|
// XXX This could be some pathological situation where negative spacing
|
|
// caused characters to move backwards. We can't really handle that
|
|
// in the current frame system because frames can't have negative
|
|
// intrinsic widths.
|
|
selectedOffset =
|
|
provider.GetStart().GetOriginalOffset() + provider.GetOriginalLength();
|
|
// If we're at the end of a preformatted line which has a terminating
|
|
// linefeed, we want to reduce the offset by one to make sure that the
|
|
// selection is placed before the linefeed character.
|
|
if (GetStyleText()->NewlineIsSignificant() &&
|
|
HasTerminalNewline()) {
|
|
--selectedOffset;
|
|
}
|
|
}
|
|
|
|
offsets.content = GetContent();
|
|
offsets.offset = offsets.secondaryOffset = selectedOffset;
|
|
offsets.associateWithNext = mContentOffset == offsets.offset;
|
|
return offsets;
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::CombineSelectionUnderlineRect(nsPresContext* aPresContext,
|
|
nsRect& aRect)
|
|
{
|
|
if (aRect.IsEmpty())
|
|
return PR_FALSE;
|
|
|
|
nsRect givenRect = aRect;
|
|
|
|
nsRefPtr<nsFontMetrics> fm;
|
|
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
|
|
gfxFontGroup* fontGroup = fm->GetThebesFontGroup();
|
|
gfxFont* firstFont = fontGroup->GetFontAt(0);
|
|
if (!firstFont)
|
|
return PR_FALSE; // OOM
|
|
const gfxFont::Metrics& metrics = firstFont->GetMetrics();
|
|
gfxFloat underlineOffset = fontGroup->GetUnderlineOffset();
|
|
gfxFloat ascent = aPresContext->AppUnitsToGfxUnits(mAscent);
|
|
gfxFloat descentLimit =
|
|
ComputeDescentLimitForSelectionUnderline(aPresContext, this, metrics);
|
|
|
|
SelectionDetails *details = GetSelectionDetails();
|
|
for (SelectionDetails *sd = details; sd; sd = sd->mNext) {
|
|
if (sd->mStart == sd->mEnd || !(sd->mType & SelectionTypesWithDecorations))
|
|
continue;
|
|
|
|
PRUint8 style;
|
|
float relativeSize;
|
|
PRInt32 index =
|
|
nsTextPaintStyle::GetUnderlineStyleIndexForSelectionType(sd->mType);
|
|
if (sd->mType == nsISelectionController::SELECTION_SPELLCHECK) {
|
|
if (!nsTextPaintStyle::GetSelectionUnderline(aPresContext, index, nsnull,
|
|
&relativeSize, &style)) {
|
|
continue;
|
|
}
|
|
} else {
|
|
// IME selections
|
|
nsTextRangeStyle& rangeStyle = sd->mTextRangeStyle;
|
|
if (rangeStyle.IsDefined()) {
|
|
if (!rangeStyle.IsLineStyleDefined() ||
|
|
rangeStyle.mLineStyle == nsTextRangeStyle::LINESTYLE_NONE) {
|
|
continue;
|
|
}
|
|
style = rangeStyle.mLineStyle;
|
|
relativeSize = rangeStyle.mIsBoldLine ? 2.0f : 1.0f;
|
|
} else if (!nsTextPaintStyle::GetSelectionUnderline(aPresContext, index,
|
|
nsnull, &relativeSize,
|
|
&style)) {
|
|
continue;
|
|
}
|
|
}
|
|
nsRect decorationArea;
|
|
gfxSize size(aPresContext->AppUnitsToGfxUnits(aRect.width),
|
|
ComputeSelectionUnderlineHeight(aPresContext,
|
|
metrics, sd->mType));
|
|
relativeSize = NS_MAX(relativeSize, 1.0f);
|
|
size.height *= relativeSize;
|
|
decorationArea =
|
|
nsCSSRendering::GetTextDecorationRect(aPresContext, size,
|
|
ascent, underlineOffset, NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE,
|
|
style, descentLimit);
|
|
aRect.UnionRect(aRect, decorationArea);
|
|
}
|
|
DestroySelectionDetails(details);
|
|
|
|
return !aRect.IsEmpty() && !givenRect.Contains(aRect);
|
|
}
|
|
|
|
void
|
|
nsTextFrame::SetSelected(PRBool aSelected,
|
|
SelectionType aType)
|
|
{
|
|
SetSelectedRange(0, mContent->GetText()->GetLength(), aSelected, aType);
|
|
}
|
|
|
|
void
|
|
nsTextFrame::SetSelectedRange(PRUint32 aStart,
|
|
PRUint32 aEnd,
|
|
PRBool aSelected,
|
|
SelectionType aType)
|
|
{
|
|
NS_ASSERTION(!GetPrevContinuation(), "Should only be called for primary frame");
|
|
DEBUG_VERIFY_NOT_DIRTY(mState);
|
|
|
|
// Selection is collapsed, which can't affect text frame rendering
|
|
if (aStart == aEnd)
|
|
return;
|
|
|
|
if (aType == nsISelectionController::SELECTION_NORMAL) {
|
|
// check whether style allows selection
|
|
PRBool selectable;
|
|
IsSelectable(&selectable, nsnull);
|
|
if (!selectable)
|
|
return;
|
|
}
|
|
|
|
PRBool anySelected = PR_FALSE;
|
|
|
|
nsTextFrame* f = this;
|
|
while (f && f->GetContentEnd() <= PRInt32(aStart)) {
|
|
if (f->GetStateBits() & NS_FRAME_SELECTED_CONTENT) {
|
|
anySelected = PR_TRUE;
|
|
}
|
|
f = static_cast<nsTextFrame*>(f->GetNextContinuation());
|
|
}
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
while (f && f->GetContentOffset() < PRInt32(aEnd)) {
|
|
if (aSelected) {
|
|
f->AddStateBits(NS_FRAME_SELECTED_CONTENT);
|
|
anySelected = PR_TRUE;
|
|
} else { // we need to see if any other selection is available.
|
|
SelectionDetails *details = f->GetSelectionDetails();
|
|
if (details) {
|
|
anySelected = PR_TRUE;
|
|
DestroySelectionDetails(details);
|
|
} else {
|
|
f->RemoveStateBits(NS_FRAME_SELECTED_CONTENT);
|
|
}
|
|
}
|
|
|
|
// We may need to reflow to recompute the overflow area for
|
|
// spellchecking or IME underline if their underline is thicker than
|
|
// the normal decoration line.
|
|
if (aType & SelectionTypesWithDecorations) {
|
|
PRBool didHaveOverflowingSelection =
|
|
(f->GetStateBits() & TEXT_SELECTION_UNDERLINE_OVERFLOWED) != 0;
|
|
nsRect r(nsPoint(0, 0), GetSize());
|
|
PRBool willHaveOverflowingSelection =
|
|
aSelected && f->CombineSelectionUnderlineRect(presContext, r);
|
|
if (didHaveOverflowingSelection || willHaveOverflowingSelection) {
|
|
presContext->PresShell()->FrameNeedsReflow(f,
|
|
nsIPresShell::eStyleChange,
|
|
NS_FRAME_IS_DIRTY);
|
|
}
|
|
}
|
|
// Selection might change anything. Invalidate the overflow area.
|
|
f->InvalidateOverflowRect();
|
|
|
|
f = static_cast<nsTextFrame*>(f->GetNextContinuation());
|
|
}
|
|
|
|
// Scan remaining continuations to see if any are selected
|
|
while (f && !anySelected) {
|
|
if (f->GetStateBits() & NS_FRAME_SELECTED_CONTENT) {
|
|
anySelected = PR_TRUE;
|
|
}
|
|
f = static_cast<nsTextFrame*>(f->GetNextContinuation());
|
|
}
|
|
|
|
if (anySelected) {
|
|
mContent->SetFlags(NS_TEXT_IN_SELECTION);
|
|
} else {
|
|
// This is only legal because there is only one presentation for the
|
|
// content with a selection
|
|
mContent->UnsetFlags(NS_TEXT_IN_SELECTION);
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetPointFromOffset(PRInt32 inOffset,
|
|
nsPoint* outPoint)
|
|
{
|
|
if (!outPoint)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
outPoint->x = 0;
|
|
outPoint->y = 0;
|
|
|
|
DEBUG_VERIFY_NOT_DIRTY(mState);
|
|
if (mState & NS_FRAME_IS_DIRTY)
|
|
return NS_ERROR_UNEXPECTED;
|
|
|
|
if (GetContentLength() <= 0) {
|
|
return NS_OK;
|
|
}
|
|
|
|
gfxSkipCharsIterator iter = EnsureTextRun();
|
|
if (!mTextRun)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
PropertyProvider properties(this, iter);
|
|
// Don't trim trailing whitespace, we want the caret to appear in the right
|
|
// place if it's positioned there
|
|
properties.InitializeForDisplay(PR_FALSE);
|
|
|
|
if (inOffset < GetContentOffset()){
|
|
NS_WARNING("offset before this frame's content");
|
|
inOffset = GetContentOffset();
|
|
} else if (inOffset > GetContentEnd()) {
|
|
NS_WARNING("offset after this frame's content");
|
|
inOffset = GetContentEnd();
|
|
}
|
|
PRInt32 trimmedOffset = properties.GetStart().GetOriginalOffset();
|
|
PRInt32 trimmedEnd = trimmedOffset + properties.GetOriginalLength();
|
|
inOffset = NS_MAX(inOffset, trimmedOffset);
|
|
inOffset = NS_MIN(inOffset, trimmedEnd);
|
|
|
|
iter.SetOriginalOffset(inOffset);
|
|
|
|
if (inOffset < trimmedEnd &&
|
|
!iter.IsOriginalCharSkipped() &&
|
|
!mTextRun->IsClusterStart(iter.GetSkippedOffset())) {
|
|
NS_WARNING("GetPointFromOffset called for non-cluster boundary");
|
|
FindClusterStart(mTextRun, trimmedOffset, &iter);
|
|
}
|
|
|
|
gfxFloat advanceWidth =
|
|
mTextRun->GetAdvanceWidth(properties.GetStart().GetSkippedOffset(),
|
|
GetSkippedDistance(properties.GetStart(), iter),
|
|
&properties);
|
|
nscoord width = NSToCoordCeilClamped(advanceWidth);
|
|
|
|
if (mTextRun->IsRightToLeft()) {
|
|
outPoint->x = mRect.width - width;
|
|
} else {
|
|
outPoint->x = width;
|
|
}
|
|
outPoint->y = 0;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetChildFrameContainingOffset(PRInt32 aContentOffset,
|
|
PRBool aHint,
|
|
PRInt32* aOutOffset,
|
|
nsIFrame**aOutFrame)
|
|
{
|
|
DEBUG_VERIFY_NOT_DIRTY(mState);
|
|
#if 0 //XXXrbs disable due to bug 310227
|
|
if (mState & NS_FRAME_IS_DIRTY)
|
|
return NS_ERROR_UNEXPECTED;
|
|
#endif
|
|
|
|
NS_ASSERTION(aOutOffset && aOutFrame, "Bad out parameters");
|
|
NS_ASSERTION(aContentOffset >= 0, "Negative content offset, existing code was very broken!");
|
|
nsIFrame* primaryFrame = mContent->GetPrimaryFrame();
|
|
if (this != primaryFrame) {
|
|
// This call needs to happen on the primary frame
|
|
return primaryFrame->GetChildFrameContainingOffset(aContentOffset, aHint,
|
|
aOutOffset, aOutFrame);
|
|
}
|
|
|
|
nsTextFrame* f = this;
|
|
PRInt32 offset = mContentOffset;
|
|
|
|
// Try to look up the offset to frame property
|
|
nsTextFrame* cachedFrame = static_cast<nsTextFrame*>
|
|
(Properties().Get(OffsetToFrameProperty()));
|
|
|
|
if (cachedFrame) {
|
|
f = cachedFrame;
|
|
offset = f->GetContentOffset();
|
|
|
|
f->RemoveStateBits(TEXT_IN_OFFSET_CACHE);
|
|
}
|
|
|
|
if ((aContentOffset >= offset) &&
|
|
(aHint || aContentOffset != offset)) {
|
|
while (PR_TRUE) {
|
|
nsTextFrame* next = static_cast<nsTextFrame*>(f->GetNextContinuation());
|
|
if (!next || aContentOffset < next->GetContentOffset())
|
|
break;
|
|
if (aContentOffset == next->GetContentOffset()) {
|
|
if (aHint) {
|
|
f = next;
|
|
}
|
|
break;
|
|
}
|
|
f = next;
|
|
}
|
|
} else {
|
|
while (PR_TRUE) {
|
|
nsTextFrame* prev = static_cast<nsTextFrame*>(f->GetPrevContinuation());
|
|
if (!prev || aContentOffset > f->GetContentOffset())
|
|
break;
|
|
if (aContentOffset == f->GetContentOffset()) {
|
|
if (!aHint) {
|
|
f = prev;
|
|
}
|
|
break;
|
|
}
|
|
f = prev;
|
|
}
|
|
}
|
|
|
|
*aOutOffset = aContentOffset - f->GetContentOffset();
|
|
*aOutFrame = f;
|
|
|
|
// cache the frame we found
|
|
Properties().Set(OffsetToFrameProperty(), f);
|
|
f->AddStateBits(TEXT_IN_OFFSET_CACHE);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::PeekOffsetNoAmount(PRBool aForward, PRInt32* aOffset)
|
|
{
|
|
NS_ASSERTION(aOffset && *aOffset <= GetContentLength(), "aOffset out of range");
|
|
|
|
gfxSkipCharsIterator iter = EnsureTextRun();
|
|
if (!mTextRun)
|
|
return PR_FALSE;
|
|
|
|
TrimmedOffsets trimmed = GetTrimmedOffsets(mContent->GetText(), PR_TRUE);
|
|
// Check whether there are nonskipped characters in the trimmmed range
|
|
return iter.ConvertOriginalToSkipped(trimmed.GetEnd()) >
|
|
iter.ConvertOriginalToSkipped(trimmed.mStart);
|
|
}
|
|
|
|
/**
|
|
* This class iterates through the clusters before or after the given
|
|
* aPosition (which is a content offset). You can test each cluster
|
|
* to see if it's whitespace (as far as selection/caret movement is concerned),
|
|
* or punctuation, or if there is a word break before the cluster. ("Before"
|
|
* is interpreted according to aDirection, so if aDirection is -1, "before"
|
|
* means actually *after* the cluster content.)
|
|
*/
|
|
class NS_STACK_CLASS ClusterIterator {
|
|
public:
|
|
ClusterIterator(nsTextFrame* aTextFrame, PRInt32 aPosition, PRInt32 aDirection,
|
|
nsString& aContext);
|
|
|
|
PRBool NextCluster();
|
|
PRBool IsWhitespace();
|
|
PRBool IsPunctuation();
|
|
PRBool HaveWordBreakBefore() { return mHaveWordBreak; }
|
|
PRInt32 GetAfterOffset();
|
|
PRInt32 GetBeforeOffset();
|
|
|
|
private:
|
|
nsCOMPtr<nsIUGenCategory> mCategories;
|
|
gfxSkipCharsIterator mIterator;
|
|
const nsTextFragment* mFrag;
|
|
nsTextFrame* mTextFrame;
|
|
PRInt32 mDirection;
|
|
PRInt32 mCharIndex;
|
|
nsTextFrame::TrimmedOffsets mTrimmed;
|
|
nsTArray<PRPackedBool> mWordBreaks;
|
|
PRPackedBool mHaveWordBreak;
|
|
};
|
|
|
|
static PRBool
|
|
IsAcceptableCaretPosition(const gfxSkipCharsIterator& aIter,
|
|
PRBool aRespectClusters,
|
|
gfxTextRun* aTextRun,
|
|
nsIFrame* aFrame)
|
|
{
|
|
if (aIter.IsOriginalCharSkipped())
|
|
return PR_FALSE;
|
|
PRUint32 index = aIter.GetSkippedOffset();
|
|
if (aRespectClusters && !aTextRun->IsClusterStart(index))
|
|
return PR_FALSE;
|
|
if (index > 0) {
|
|
// Check whether the proposed position is in between the two halves of a
|
|
// surrogate pair; if so, this is not a valid character boundary.
|
|
// (In the case where we are respecting clusters, we won't actually get
|
|
// this far because the low surrogate is also marked as non-clusterStart
|
|
// so we'll return FALSE above.)
|
|
// If the textrun is 8-bit it can't have any surrogates, so we only need
|
|
// to check the actual characters if GetTextUnicode() returns non-null.
|
|
const PRUnichar *txt = aTextRun->GetTextUnicode();
|
|
if (txt && NS_IS_LOW_SURROGATE(txt[index]) &&
|
|
NS_IS_HIGH_SURROGATE(txt[index-1]))
|
|
return PR_FALSE;
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::PeekOffsetCharacter(PRBool aForward, PRInt32* aOffset,
|
|
PRBool aRespectClusters)
|
|
{
|
|
PRInt32 contentLength = GetContentLength();
|
|
NS_ASSERTION(aOffset && *aOffset <= contentLength, "aOffset out of range");
|
|
|
|
PRBool selectable;
|
|
PRUint8 selectStyle;
|
|
IsSelectable(&selectable, &selectStyle);
|
|
if (selectStyle == NS_STYLE_USER_SELECT_ALL)
|
|
return PR_FALSE;
|
|
|
|
gfxSkipCharsIterator iter = EnsureTextRun();
|
|
if (!mTextRun)
|
|
return PR_FALSE;
|
|
|
|
TrimmedOffsets trimmed = GetTrimmedOffsets(mContent->GetText(), PR_FALSE);
|
|
|
|
// A negative offset means "end of frame".
|
|
PRInt32 startOffset = GetContentOffset() + (*aOffset < 0 ? contentLength : *aOffset);
|
|
|
|
if (!aForward) {
|
|
// If at the beginning of the line, look at the previous continuation
|
|
for (PRInt32 i = NS_MIN(trimmed.GetEnd(), startOffset) - 1;
|
|
i >= trimmed.mStart; --i) {
|
|
iter.SetOriginalOffset(i);
|
|
if (IsAcceptableCaretPosition(iter, aRespectClusters, mTextRun, this)) {
|
|
*aOffset = i - mContentOffset;
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
*aOffset = 0;
|
|
} else {
|
|
// If we're at the end of a line, look at the next continuation
|
|
iter.SetOriginalOffset(startOffset);
|
|
if (startOffset <= trimmed.GetEnd() &&
|
|
!(startOffset < trimmed.GetEnd() &&
|
|
GetStyleText()->NewlineIsSignificant() &&
|
|
iter.GetSkippedOffset() < mTextRun->GetLength() &&
|
|
mTextRun->GetChar(iter.GetSkippedOffset()) == '\n')) {
|
|
for (PRInt32 i = startOffset + 1; i <= trimmed.GetEnd(); ++i) {
|
|
iter.SetOriginalOffset(i);
|
|
if (i == trimmed.GetEnd() ||
|
|
IsAcceptableCaretPosition(iter, aRespectClusters, mTextRun, this)) {
|
|
*aOffset = i - mContentOffset;
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
*aOffset = contentLength;
|
|
}
|
|
|
|
return PR_FALSE;
|
|
}
|
|
|
|
PRBool
|
|
ClusterIterator::IsWhitespace()
|
|
{
|
|
NS_ASSERTION(mCharIndex >= 0, "No cluster selected");
|
|
return IsSelectionSpace(mFrag, mCharIndex);
|
|
}
|
|
|
|
PRBool
|
|
ClusterIterator::IsPunctuation()
|
|
{
|
|
NS_ASSERTION(mCharIndex >= 0, "No cluster selected");
|
|
if (!mCategories)
|
|
return PR_FALSE;
|
|
nsIUGenCategory::nsUGenCategory c = mCategories->Get(mFrag->CharAt(mCharIndex));
|
|
return c == nsIUGenCategory::kPunctuation || c == nsIUGenCategory::kSymbol;
|
|
}
|
|
|
|
PRInt32
|
|
ClusterIterator::GetBeforeOffset()
|
|
{
|
|
NS_ASSERTION(mCharIndex >= 0, "No cluster selected");
|
|
return mCharIndex + (mDirection > 0 ? 0 : 1);
|
|
}
|
|
|
|
PRInt32
|
|
ClusterIterator::GetAfterOffset()
|
|
{
|
|
NS_ASSERTION(mCharIndex >= 0, "No cluster selected");
|
|
return mCharIndex + (mDirection > 0 ? 1 : 0);
|
|
}
|
|
|
|
PRBool
|
|
ClusterIterator::NextCluster()
|
|
{
|
|
if (!mDirection)
|
|
return PR_FALSE;
|
|
gfxTextRun* textRun = mTextFrame->GetTextRun();
|
|
|
|
mHaveWordBreak = PR_FALSE;
|
|
while (PR_TRUE) {
|
|
PRBool keepGoing = PR_FALSE;
|
|
if (mDirection > 0) {
|
|
if (mIterator.GetOriginalOffset() >= mTrimmed.GetEnd())
|
|
return PR_FALSE;
|
|
keepGoing = mIterator.IsOriginalCharSkipped() ||
|
|
mIterator.GetOriginalOffset() < mTrimmed.mStart ||
|
|
!textRun->IsClusterStart(mIterator.GetSkippedOffset());
|
|
mCharIndex = mIterator.GetOriginalOffset();
|
|
mIterator.AdvanceOriginal(1);
|
|
} else {
|
|
if (mIterator.GetOriginalOffset() <= mTrimmed.mStart)
|
|
return PR_FALSE;
|
|
mIterator.AdvanceOriginal(-1);
|
|
keepGoing = mIterator.IsOriginalCharSkipped() ||
|
|
mIterator.GetOriginalOffset() >= mTrimmed.GetEnd() ||
|
|
!textRun->IsClusterStart(mIterator.GetSkippedOffset());
|
|
mCharIndex = mIterator.GetOriginalOffset();
|
|
}
|
|
|
|
if (mWordBreaks[GetBeforeOffset() - mTextFrame->GetContentOffset()]) {
|
|
mHaveWordBreak = PR_TRUE;
|
|
}
|
|
if (!keepGoing)
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
|
|
ClusterIterator::ClusterIterator(nsTextFrame* aTextFrame, PRInt32 aPosition,
|
|
PRInt32 aDirection, nsString& aContext)
|
|
: mTextFrame(aTextFrame), mDirection(aDirection), mCharIndex(-1)
|
|
{
|
|
mIterator = aTextFrame->EnsureTextRun();
|
|
if (!aTextFrame->GetTextRun()) {
|
|
mDirection = 0; // signal failure
|
|
return;
|
|
}
|
|
mIterator.SetOriginalOffset(aPosition);
|
|
|
|
mCategories = do_GetService(NS_UNICHARCATEGORY_CONTRACTID);
|
|
|
|
mFrag = aTextFrame->GetContent()->GetText();
|
|
mTrimmed = aTextFrame->GetTrimmedOffsets(mFrag, PR_TRUE);
|
|
|
|
PRInt32 textOffset = aTextFrame->GetContentOffset();
|
|
PRInt32 textLen = aTextFrame->GetContentLength();
|
|
if (!mWordBreaks.AppendElements(textLen + 1)) {
|
|
mDirection = 0; // signal failure
|
|
return;
|
|
}
|
|
memset(mWordBreaks.Elements(), PR_FALSE, textLen + 1);
|
|
PRInt32 textStart;
|
|
if (aDirection > 0) {
|
|
if (aContext.IsEmpty()) {
|
|
// No previous context, so it must be the start of a line or text run
|
|
mWordBreaks[0] = PR_TRUE;
|
|
}
|
|
textStart = aContext.Length();
|
|
mFrag->AppendTo(aContext, textOffset, textLen);
|
|
} else {
|
|
if (aContext.IsEmpty()) {
|
|
// No following context, so it must be the end of a line or text run
|
|
mWordBreaks[textLen] = PR_TRUE;
|
|
}
|
|
textStart = 0;
|
|
nsAutoString str;
|
|
mFrag->AppendTo(str, textOffset, textLen);
|
|
aContext.Insert(str, 0);
|
|
}
|
|
nsIWordBreaker* wordBreaker = nsContentUtils::WordBreaker();
|
|
PRInt32 i;
|
|
for (i = 0; i <= textLen; ++i) {
|
|
PRInt32 indexInText = i + textStart;
|
|
mWordBreaks[i] |=
|
|
wordBreaker->BreakInBetween(aContext.get(), indexInText,
|
|
aContext.get() + indexInText,
|
|
aContext.Length() - indexInText);
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::PeekOffsetWord(PRBool aForward, PRBool aWordSelectEatSpace, PRBool aIsKeyboardSelect,
|
|
PRInt32* aOffset, PeekWordState* aState)
|
|
{
|
|
PRInt32 contentLength = GetContentLength();
|
|
NS_ASSERTION (aOffset && *aOffset <= contentLength, "aOffset out of range");
|
|
|
|
PRBool selectable;
|
|
PRUint8 selectStyle;
|
|
IsSelectable(&selectable, &selectStyle);
|
|
if (selectStyle == NS_STYLE_USER_SELECT_ALL)
|
|
return PR_FALSE;
|
|
|
|
PRInt32 offset = GetContentOffset() + (*aOffset < 0 ? contentLength : *aOffset);
|
|
ClusterIterator cIter(this, offset, aForward ? 1 : -1, aState->mContext);
|
|
|
|
if (!cIter.NextCluster())
|
|
return PR_FALSE;
|
|
|
|
do {
|
|
PRBool isPunctuation = cIter.IsPunctuation();
|
|
PRBool isWhitespace = cIter.IsWhitespace();
|
|
PRBool isWordBreakBefore = cIter.HaveWordBreakBefore();
|
|
if (aWordSelectEatSpace == isWhitespace && !aState->mSawBeforeType) {
|
|
aState->SetSawBeforeType();
|
|
aState->Update(isPunctuation, isWhitespace);
|
|
continue;
|
|
}
|
|
// See if we can break before the current cluster
|
|
if (!aState->mAtStart) {
|
|
PRBool canBreak;
|
|
if (isPunctuation != aState->mLastCharWasPunctuation) {
|
|
canBreak = BreakWordBetweenPunctuation(aState, aForward,
|
|
isPunctuation, isWhitespace, aIsKeyboardSelect);
|
|
} else if (!aState->mLastCharWasWhitespace &&
|
|
!isWhitespace && !isPunctuation && isWordBreakBefore) {
|
|
// if both the previous and the current character are not white
|
|
// space but this can be word break before, we don't need to eat
|
|
// a white space in this case. This case happens in some languages
|
|
// that their words are not separated by white spaces. E.g.,
|
|
// Japanese and Chinese.
|
|
canBreak = PR_TRUE;
|
|
} else {
|
|
canBreak = isWordBreakBefore && aState->mSawBeforeType;
|
|
}
|
|
if (canBreak) {
|
|
*aOffset = cIter.GetBeforeOffset() - mContentOffset;
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
aState->Update(isPunctuation, isWhitespace);
|
|
} while (cIter.NextCluster());
|
|
|
|
*aOffset = cIter.GetAfterOffset() - mContentOffset;
|
|
return PR_FALSE;
|
|
}
|
|
|
|
// TODO this needs to be deCOMtaminated with the interface fixed in
|
|
// nsIFrame.h, but we won't do that until the old textframe is gone.
|
|
NS_IMETHODIMP
|
|
nsTextFrame::CheckVisibility(nsPresContext* aContext, PRInt32 aStartIndex,
|
|
PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *aRetval)
|
|
{
|
|
if (!aRetval)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
// Text in the range is visible if there is at least one character in the range
|
|
// that is not skipped and is mapped by this frame (which is the primary frame)
|
|
// or one of its continuations.
|
|
for (nsTextFrame* f = this; f;
|
|
f = static_cast<nsTextFrame*>(GetNextContinuation())) {
|
|
PRInt32 dummyOffset = 0;
|
|
if (f->PeekOffsetNoAmount(PR_TRUE, &dummyOffset)) {
|
|
*aRetval = PR_TRUE;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
*aRetval = PR_FALSE;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetOffsets(PRInt32 &start, PRInt32 &end) const
|
|
{
|
|
start = GetContentOffset();
|
|
end = GetContentEnd();
|
|
return NS_OK;
|
|
}
|
|
|
|
static PRInt32
|
|
FindEndOfPunctuationRun(const nsTextFragment* aFrag,
|
|
gfxTextRun* aTextRun,
|
|
gfxSkipCharsIterator* aIter,
|
|
PRInt32 aOffset,
|
|
PRInt32 aStart,
|
|
PRInt32 aEnd)
|
|
{
|
|
PRInt32 i;
|
|
|
|
for (i = aStart; i < aEnd - aOffset; ++i) {
|
|
if (nsContentUtils::IsPunctuationMarkAt(aFrag, aOffset + i)) {
|
|
aIter->SetOriginalOffset(aOffset + i);
|
|
FindClusterEnd(aTextRun, aEnd, aIter);
|
|
i = aIter->GetOriginalOffset() - aOffset;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
return i;
|
|
}
|
|
|
|
/**
|
|
* Returns PR_TRUE if this text frame completes the first-letter, PR_FALSE
|
|
* if it does not contain a true "letter".
|
|
* If returns PR_TRUE, then it also updates aLength to cover just the first-letter
|
|
* text.
|
|
*
|
|
* XXX :first-letter should be handled during frame construction
|
|
* (and it has a good bit in common with nextBidi)
|
|
*
|
|
* @param aLength an in/out parameter: on entry contains the maximum length to
|
|
* return, on exit returns length of the first-letter fragment (which may
|
|
* include leading and trailing punctuation, for example)
|
|
*/
|
|
static PRBool
|
|
FindFirstLetterRange(const nsTextFragment* aFrag,
|
|
gfxTextRun* aTextRun,
|
|
PRInt32 aOffset, const gfxSkipCharsIterator& aIter,
|
|
PRInt32* aLength)
|
|
{
|
|
PRInt32 i;
|
|
PRInt32 length = *aLength;
|
|
PRInt32 endOffset = aOffset + length;
|
|
gfxSkipCharsIterator iter(aIter);
|
|
|
|
// skip leading whitespace, then consume clusters that start with punctuation
|
|
i = FindEndOfPunctuationRun(aFrag, aTextRun, &iter, aOffset,
|
|
GetTrimmableWhitespaceCount(aFrag, aOffset, length, 1),
|
|
endOffset);
|
|
if (i == length)
|
|
return PR_FALSE;
|
|
|
|
// If the next character is not a letter or number, there is no first-letter.
|
|
// Return PR_TRUE so that we don't go on looking, but set aLength to 0.
|
|
if (!nsContentUtils::IsAlphanumericAt(aFrag, aOffset + i)) {
|
|
*aLength = 0;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// consume another cluster (the actual first letter)
|
|
iter.SetOriginalOffset(aOffset + i);
|
|
FindClusterEnd(aTextRun, endOffset, &iter);
|
|
i = iter.GetOriginalOffset() - aOffset;
|
|
if (i + 1 == length)
|
|
return PR_TRUE;
|
|
|
|
// consume clusters that start with punctuation
|
|
i = FindEndOfPunctuationRun(aFrag, aTextRun, &iter, aOffset, i + 1, endOffset);
|
|
if (i < length)
|
|
*aLength = i;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
static PRUint32
|
|
FindStartAfterSkippingWhitespace(PropertyProvider* aProvider,
|
|
nsIFrame::InlineIntrinsicWidthData* aData,
|
|
const nsStyleText* aTextStyle,
|
|
gfxSkipCharsIterator* aIterator,
|
|
PRUint32 aFlowEndInTextRun)
|
|
{
|
|
if (aData->skipWhitespace) {
|
|
while (aIterator->GetSkippedOffset() < aFlowEndInTextRun &&
|
|
IsTrimmableSpace(aProvider->GetFragment(), aIterator->GetOriginalOffset(), aTextStyle)) {
|
|
aIterator->AdvanceOriginal(1);
|
|
}
|
|
}
|
|
return aIterator->GetSkippedOffset();
|
|
}
|
|
|
|
/* virtual */
|
|
void nsTextFrame::MarkIntrinsicWidthsDirty()
|
|
{
|
|
ClearTextRun(nsnull);
|
|
nsFrame::MarkIntrinsicWidthsDirty();
|
|
}
|
|
|
|
// XXX this doesn't handle characters shaped by line endings. We need to
|
|
// temporarily override the "current line ending" settings.
|
|
void
|
|
nsTextFrame::AddInlineMinWidthForFlow(nsRenderingContext *aRenderingContext,
|
|
nsIFrame::InlineMinWidthData *aData)
|
|
{
|
|
PRUint32 flowEndInTextRun;
|
|
gfxContext* ctx = aRenderingContext->ThebesContext();
|
|
gfxSkipCharsIterator iter =
|
|
EnsureTextRun(ctx, aData->lineContainer, aData->line, &flowEndInTextRun);
|
|
if (!mTextRun)
|
|
return;
|
|
|
|
// Pass null for the line container. This will disable tab spacing, but that's
|
|
// OK since we can't really handle tabs for intrinsic sizing anyway.
|
|
const nsStyleText* textStyle = GetStyleText();
|
|
const nsTextFragment* frag = mContent->GetText();
|
|
|
|
// If we're hyphenating, the PropertyProvider needs the actual length;
|
|
// otherwise we can just pass PR_INT32_MAX to mean "all the text"
|
|
PRInt32 len = PR_INT32_MAX;
|
|
PRBool hyphenating = frag->GetLength() > 0 &&
|
|
(textStyle->mHyphens == NS_STYLE_HYPHENS_AUTO ||
|
|
(textStyle->mHyphens == NS_STYLE_HYPHENS_MANUAL &&
|
|
(mTextRun->GetFlags() & gfxTextRunFactory::TEXT_ENABLE_HYPHEN_BREAKS) != 0));
|
|
if (hyphenating) {
|
|
gfxSkipCharsIterator tmp(iter);
|
|
len = PR_MIN(GetContentOffset() + GetInFlowContentLength(),
|
|
tmp.ConvertSkippedToOriginal(flowEndInTextRun)) - iter.GetOriginalOffset();
|
|
}
|
|
PropertyProvider provider(mTextRun, textStyle, frag, this,
|
|
iter, len, nsnull, 0);
|
|
|
|
PRBool collapseWhitespace = !textStyle->WhiteSpaceIsSignificant();
|
|
PRBool preformatNewlines = textStyle->NewlineIsSignificant();
|
|
PRBool preformatTabs = textStyle->WhiteSpaceIsSignificant();
|
|
gfxFloat tabWidth = -1;
|
|
PRUint32 start =
|
|
FindStartAfterSkippingWhitespace(&provider, aData, textStyle, &iter, flowEndInTextRun);
|
|
|
|
nsAutoTArray<PRPackedBool,BIG_TEXT_NODE_SIZE> hyphBuffer;
|
|
PRPackedBool *hyphBreakBefore = nsnull;
|
|
if (hyphenating) {
|
|
hyphBreakBefore = hyphBuffer.AppendElements(flowEndInTextRun - start);
|
|
if (hyphBreakBefore) {
|
|
provider.GetHyphenationBreaks(start, flowEndInTextRun - start,
|
|
hyphBreakBefore);
|
|
}
|
|
}
|
|
|
|
for (PRUint32 i = start, wordStart = start; i <= flowEndInTextRun; ++i) {
|
|
PRBool preformattedNewline = PR_FALSE;
|
|
PRBool preformattedTab = PR_FALSE;
|
|
if (i < flowEndInTextRun) {
|
|
// XXXldb Shouldn't we be including the newline as part of the
|
|
// segment that it ends rather than part of the segment that it
|
|
// starts?
|
|
preformattedNewline = preformatNewlines && mTextRun->GetChar(i) == '\n';
|
|
preformattedTab = preformatTabs && mTextRun->GetChar(i) == '\t';
|
|
if (!mTextRun->CanBreakLineBefore(i) &&
|
|
!preformattedNewline &&
|
|
!preformattedTab &&
|
|
(!hyphBreakBefore || !hyphBreakBefore[i - start]))
|
|
{
|
|
// we can't break here (and it's not the end of the flow)
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (i > wordStart) {
|
|
nscoord width =
|
|
NSToCoordCeilClamped(mTextRun->GetAdvanceWidth(wordStart, i - wordStart, &provider));
|
|
aData->currentLine = NSCoordSaturatingAdd(aData->currentLine, width);
|
|
aData->atStartOfLine = PR_FALSE;
|
|
|
|
if (collapseWhitespace) {
|
|
PRUint32 trimStart = GetEndOfTrimmedText(frag, textStyle, wordStart, i, &iter);
|
|
if (trimStart == start) {
|
|
// This is *all* trimmable whitespace, so whatever trailingWhitespace
|
|
// we saw previously is still trailing...
|
|
aData->trailingWhitespace += width;
|
|
} else {
|
|
// Some non-whitespace so the old trailingWhitespace is no longer trailing
|
|
aData->trailingWhitespace =
|
|
NSToCoordCeilClamped(mTextRun->GetAdvanceWidth(trimStart, i - trimStart, &provider));
|
|
}
|
|
} else {
|
|
aData->trailingWhitespace = 0;
|
|
}
|
|
}
|
|
|
|
if (preformattedTab) {
|
|
PropertyProvider::Spacing spacing;
|
|
provider.GetSpacing(i, 1, &spacing);
|
|
aData->currentLine += nscoord(spacing.mBefore);
|
|
gfxFloat afterTab =
|
|
AdvanceToNextTab(aData->currentLine, this,
|
|
mTextRun, &tabWidth);
|
|
aData->currentLine = nscoord(afterTab + spacing.mAfter);
|
|
wordStart = i + 1;
|
|
} else if (i < flowEndInTextRun ||
|
|
(i == mTextRun->GetLength() &&
|
|
(mTextRun->GetFlags() & nsTextFrameUtils::TEXT_HAS_TRAILING_BREAK))) {
|
|
if (preformattedNewline) {
|
|
aData->ForceBreak(aRenderingContext);
|
|
} else if (i < flowEndInTextRun && hyphBreakBefore &&
|
|
hyphBreakBefore[i - start])
|
|
{
|
|
aData->OptionallyBreak(aRenderingContext, provider.GetHyphenWidth());
|
|
} {
|
|
aData->OptionallyBreak(aRenderingContext);
|
|
}
|
|
wordStart = i;
|
|
}
|
|
}
|
|
|
|
if (start < flowEndInTextRun) {
|
|
// Check if we have collapsible whitespace at the end
|
|
aData->skipWhitespace =
|
|
IsTrimmableSpace(provider.GetFragment(),
|
|
iter.ConvertSkippedToOriginal(flowEndInTextRun - 1),
|
|
textStyle);
|
|
}
|
|
}
|
|
|
|
// XXX Need to do something here to avoid incremental reflow bugs due to
|
|
// first-line and first-letter changing min-width
|
|
/* virtual */ void
|
|
nsTextFrame::AddInlineMinWidth(nsRenderingContext *aRenderingContext,
|
|
nsIFrame::InlineMinWidthData *aData)
|
|
{
|
|
nsTextFrame* f;
|
|
gfxTextRun* lastTextRun = nsnull;
|
|
// nsContinuingTextFrame does nothing for AddInlineMinWidth; all text frames
|
|
// in the flow are handled right here.
|
|
for (f = this; f; f = static_cast<nsTextFrame*>(f->GetNextContinuation())) {
|
|
// f->mTextRun could be null if we haven't set up textruns yet for f.
|
|
// Except in OOM situations, lastTextRun will only be null for the first
|
|
// text frame.
|
|
if (f == this || f->mTextRun != lastTextRun) {
|
|
nsIFrame* lc;
|
|
if (aData->lineContainer &&
|
|
aData->lineContainer != (lc = FindLineContainer(f))) {
|
|
NS_ASSERTION(f != this, "wrong InlineMinWidthData container"
|
|
" for first continuation");
|
|
aData->line = nsnull;
|
|
aData->lineContainer = lc;
|
|
}
|
|
|
|
// This will process all the text frames that share the same textrun as f.
|
|
f->AddInlineMinWidthForFlow(aRenderingContext, aData);
|
|
lastTextRun = f->mTextRun;
|
|
}
|
|
}
|
|
}
|
|
|
|
// XXX this doesn't handle characters shaped by line endings. We need to
|
|
// temporarily override the "current line ending" settings.
|
|
void
|
|
nsTextFrame::AddInlinePrefWidthForFlow(nsRenderingContext *aRenderingContext,
|
|
nsIFrame::InlinePrefWidthData *aData)
|
|
{
|
|
PRUint32 flowEndInTextRun;
|
|
gfxContext* ctx = aRenderingContext->ThebesContext();
|
|
gfxSkipCharsIterator iter =
|
|
EnsureTextRun(ctx, aData->lineContainer, aData->line, &flowEndInTextRun);
|
|
if (!mTextRun)
|
|
return;
|
|
|
|
// Pass null for the line container. This will disable tab spacing, but that's
|
|
// OK since we can't really handle tabs for intrinsic sizing anyway.
|
|
|
|
const nsStyleText* textStyle = GetStyleText();
|
|
const nsTextFragment* frag = mContent->GetText();
|
|
PropertyProvider provider(mTextRun, textStyle, frag, this,
|
|
iter, PR_INT32_MAX, nsnull, 0);
|
|
|
|
PRBool collapseWhitespace = !textStyle->WhiteSpaceIsSignificant();
|
|
PRBool preformatNewlines = textStyle->NewlineIsSignificant();
|
|
PRBool preformatTabs = textStyle->WhiteSpaceIsSignificant();
|
|
gfxFloat tabWidth = -1;
|
|
PRUint32 start =
|
|
FindStartAfterSkippingWhitespace(&provider, aData, textStyle, &iter, flowEndInTextRun);
|
|
|
|
// XXX Should we consider hyphenation here?
|
|
// If newlines and tabs aren't preformatted, nothing to do inside
|
|
// the loop so make i skip to the end
|
|
PRUint32 loopStart = (preformatNewlines || preformatTabs) ? start : flowEndInTextRun;
|
|
for (PRUint32 i = loopStart, lineStart = start; i <= flowEndInTextRun; ++i) {
|
|
PRBool preformattedNewline = PR_FALSE;
|
|
PRBool preformattedTab = PR_FALSE;
|
|
if (i < flowEndInTextRun) {
|
|
// XXXldb Shouldn't we be including the newline as part of the
|
|
// segment that it ends rather than part of the segment that it
|
|
// starts?
|
|
NS_ASSERTION(preformatNewlines, "We can't be here unless newlines are hard breaks");
|
|
preformattedNewline = preformatNewlines && mTextRun->GetChar(i) == '\n';
|
|
preformattedTab = preformatTabs && mTextRun->GetChar(i) == '\t';
|
|
if (!preformattedNewline && !preformattedTab) {
|
|
// we needn't break here (and it's not the end of the flow)
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (i > lineStart) {
|
|
nscoord width =
|
|
NSToCoordCeilClamped(mTextRun->GetAdvanceWidth(lineStart, i - lineStart, &provider));
|
|
aData->currentLine = NSCoordSaturatingAdd(aData->currentLine, width);
|
|
|
|
if (collapseWhitespace) {
|
|
PRUint32 trimStart = GetEndOfTrimmedText(frag, textStyle, lineStart, i, &iter);
|
|
if (trimStart == start) {
|
|
// This is *all* trimmable whitespace, so whatever trailingWhitespace
|
|
// we saw previously is still trailing...
|
|
aData->trailingWhitespace += width;
|
|
} else {
|
|
// Some non-whitespace so the old trailingWhitespace is no longer trailing
|
|
aData->trailingWhitespace =
|
|
NSToCoordCeilClamped(mTextRun->GetAdvanceWidth(trimStart, i - trimStart, &provider));
|
|
}
|
|
} else {
|
|
aData->trailingWhitespace = 0;
|
|
}
|
|
}
|
|
|
|
if (preformattedTab) {
|
|
PropertyProvider::Spacing spacing;
|
|
provider.GetSpacing(i, 1, &spacing);
|
|
aData->currentLine += nscoord(spacing.mBefore);
|
|
gfxFloat afterTab =
|
|
AdvanceToNextTab(aData->currentLine, this,
|
|
mTextRun, &tabWidth);
|
|
aData->currentLine = nscoord(afterTab + spacing.mAfter);
|
|
lineStart = i + 1;
|
|
} else if (preformattedNewline) {
|
|
aData->ForceBreak(aRenderingContext);
|
|
lineStart = i;
|
|
}
|
|
}
|
|
|
|
// Check if we have collapsible whitespace at the end
|
|
if (start < flowEndInTextRun) {
|
|
aData->skipWhitespace =
|
|
IsTrimmableSpace(provider.GetFragment(),
|
|
iter.ConvertSkippedToOriginal(flowEndInTextRun - 1),
|
|
textStyle);
|
|
}
|
|
}
|
|
|
|
// XXX Need to do something here to avoid incremental reflow bugs due to
|
|
// first-line and first-letter changing pref-width
|
|
/* virtual */ void
|
|
nsTextFrame::AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
|
|
nsIFrame::InlinePrefWidthData *aData)
|
|
{
|
|
nsTextFrame* f;
|
|
gfxTextRun* lastTextRun = nsnull;
|
|
// nsContinuingTextFrame does nothing for AddInlineMinWidth; all text frames
|
|
// in the flow are handled right here.
|
|
for (f = this; f; f = static_cast<nsTextFrame*>(f->GetNextContinuation())) {
|
|
// f->mTextRun could be null if we haven't set up textruns yet for f.
|
|
// Except in OOM situations, lastTextRun will only be null for the first
|
|
// text frame.
|
|
if (f == this || f->mTextRun != lastTextRun) {
|
|
nsIFrame* lc;
|
|
if (aData->lineContainer &&
|
|
aData->lineContainer != (lc = FindLineContainer(f))) {
|
|
NS_ASSERTION(f != this, "wrong InlinePrefWidthData container"
|
|
" for first continuation");
|
|
aData->line = nsnull;
|
|
aData->lineContainer = lc;
|
|
}
|
|
|
|
// This will process all the text frames that share the same textrun as f.
|
|
f->AddInlinePrefWidthForFlow(aRenderingContext, aData);
|
|
lastTextRun = f->mTextRun;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* virtual */ nsSize
|
|
nsTextFrame::ComputeSize(nsRenderingContext *aRenderingContext,
|
|
nsSize aCBSize, nscoord aAvailableWidth,
|
|
nsSize aMargin, nsSize aBorder, nsSize aPadding,
|
|
PRBool aShrinkWrap)
|
|
{
|
|
// Inlines and text don't compute size before reflow.
|
|
return nsSize(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
|
}
|
|
|
|
static nsRect
|
|
RoundOut(const gfxRect& aRect)
|
|
{
|
|
nsRect r;
|
|
r.x = NSToCoordFloor(aRect.X());
|
|
r.y = NSToCoordFloor(aRect.Y());
|
|
r.width = NSToCoordCeil(aRect.XMost()) - r.x;
|
|
r.height = NSToCoordCeil(aRect.YMost()) - r.y;
|
|
return r;
|
|
}
|
|
|
|
nsRect
|
|
nsTextFrame::ComputeTightBounds(gfxContext* aContext) const
|
|
{
|
|
if ((GetStyleContext()->HasTextDecorationLines() &&
|
|
eCompatibility_NavQuirks == PresContext()->CompatibilityMode()) ||
|
|
(GetStateBits() & TEXT_HYPHEN_BREAK)) {
|
|
// This is conservative, but OK.
|
|
return GetVisualOverflowRect();
|
|
}
|
|
|
|
gfxSkipCharsIterator iter = const_cast<nsTextFrame*>(this)->EnsureTextRun();
|
|
if (!mTextRun)
|
|
return nsRect(0, 0, 0, 0);
|
|
|
|
PropertyProvider provider(const_cast<nsTextFrame*>(this), iter);
|
|
// Trim trailing whitespace
|
|
provider.InitializeForDisplay(PR_TRUE);
|
|
|
|
gfxTextRun::Metrics metrics =
|
|
mTextRun->MeasureText(provider.GetStart().GetSkippedOffset(),
|
|
ComputeTransformedLength(provider),
|
|
gfxFont::TIGHT_HINTED_OUTLINE_EXTENTS,
|
|
aContext, &provider);
|
|
// mAscent should be the same as metrics.mAscent, but it's what we use to
|
|
// paint so that's the one we'll use.
|
|
return RoundOut(metrics.mBoundingBox) + nsPoint(0, mAscent);
|
|
}
|
|
|
|
static PRBool
|
|
HasSoftHyphenBefore(const nsTextFragment* aFrag, gfxTextRun* aTextRun,
|
|
PRInt32 aStartOffset, const gfxSkipCharsIterator& aIter)
|
|
{
|
|
if (aIter.GetSkippedOffset() < aTextRun->GetLength() &&
|
|
aTextRun->CanHyphenateBefore(aIter.GetSkippedOffset())) {
|
|
return PR_TRUE;
|
|
}
|
|
if (!(aTextRun->GetFlags() & nsTextFrameUtils::TEXT_HAS_SHY))
|
|
return PR_FALSE;
|
|
gfxSkipCharsIterator iter = aIter;
|
|
while (iter.GetOriginalOffset() > aStartOffset) {
|
|
iter.AdvanceOriginal(-1);
|
|
if (!iter.IsOriginalCharSkipped())
|
|
break;
|
|
if (aFrag->CharAt(iter.GetOriginalOffset()) == CH_SHY)
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
void
|
|
nsTextFrame::SetLength(PRInt32 aLength, nsLineLayout* aLineLayout,
|
|
PRUint32 aSetLengthFlags)
|
|
{
|
|
mContentLengthHint = aLength;
|
|
PRInt32 end = GetContentOffset() + aLength;
|
|
nsTextFrame* f = static_cast<nsTextFrame*>(GetNextInFlow());
|
|
if (!f)
|
|
return;
|
|
|
|
// If our end offset is moving, then even if frames are not being pushed or
|
|
// pulled, content is moving to or from the next line and the next line
|
|
// must be reflowed.
|
|
// If the next-continuation is dirty, then we should dirty the next line now
|
|
// because we may have skipped doing it if we dirtied it in
|
|
// CharacterDataChanged. This is ugly but teaching FrameNeedsReflow
|
|
// and ChildIsDirty to handle a range of frames would be worse.
|
|
if (aLineLayout &&
|
|
(end != f->mContentOffset || (f->GetStateBits() & NS_FRAME_IS_DIRTY))) {
|
|
aLineLayout->SetDirtyNextLine();
|
|
}
|
|
|
|
if (end < f->mContentOffset) {
|
|
// Our frame is shrinking. Give the text to our next in flow.
|
|
if (aLineLayout &&
|
|
GetStyleText()->WhiteSpaceIsSignificant() &&
|
|
HasTerminalNewline() &&
|
|
GetParent()->GetType() != nsGkAtoms::letterFrame &&
|
|
(aSetLengthFlags & ALLOW_FRAME_CREATION_AND_DESTRUCTION)) {
|
|
// Whatever text we hand to our next-in-flow will end up in a frame all of
|
|
// its own, since it ends in a forced linebreak. Might as well just put
|
|
// it in a separate frame now. This is important to prevent text run
|
|
// churn; if we did not do that, then we'd likely end up rebuilding
|
|
// textruns for all our following continuations.
|
|
// We skip this optimization when the parent is a first-letter frame
|
|
// because it doesn't deal well with more than one child frame.
|
|
// We also skip this optimization if we were called during bidi
|
|
// resolution, so as not to create a new frame which doesn't appear in
|
|
// the bidi resolver's list of frames
|
|
nsPresContext* presContext = PresContext();
|
|
nsIFrame* newFrame;
|
|
nsresult rv = presContext->PresShell()->FrameConstructor()->
|
|
CreateContinuingFrame(presContext, this, GetParent(), &newFrame);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
nsTextFrame* next = static_cast<nsTextFrame*>(newFrame);
|
|
nsFrameList temp(next, next);
|
|
GetParent()->InsertFrames(nsGkAtoms::nextBidi, this, temp);
|
|
f = next;
|
|
}
|
|
}
|
|
|
|
f->mContentOffset = end;
|
|
if (f->GetTextRun() != mTextRun) {
|
|
ClearTextRun(nsnull);
|
|
f->ClearTextRun(nsnull);
|
|
}
|
|
return;
|
|
}
|
|
// Our frame is growing. Take text from our in-flow(s).
|
|
// We can take text from frames in lines beyond just the next line.
|
|
// We don't dirty those lines. That's OK, because when we reflow
|
|
// our empty next-in-flow, it will take text from its next-in-flow and
|
|
// dirty that line.
|
|
while (f && f->mContentOffset < end) {
|
|
f->mContentOffset = end;
|
|
if (f->GetTextRun() != mTextRun) {
|
|
ClearTextRun(nsnull);
|
|
f->ClearTextRun(nsnull);
|
|
}
|
|
nsTextFrame* next = static_cast<nsTextFrame*>(f->GetNextInFlow());
|
|
// Note: the "f->GetNextSibling() == next" check below is to restrict
|
|
// this optimization to the case where they are on the same child list.
|
|
// Otherwise we might remove the only child of a nsFirstLetterFrame
|
|
// for example and it can't handle that. See bug 597627 for details.
|
|
if (next && next->mContentOffset <= end && f->GetNextSibling() == next &&
|
|
(aSetLengthFlags & ALLOW_FRAME_CREATION_AND_DESTRUCTION)) {
|
|
// |f| is now empty. We may as well remove it, instead of copying all
|
|
// the text from |next| into it instead; the latter leads to use
|
|
// rebuilding textruns for all following continuations. We have to be
|
|
// careful here, though, because some RemoveFrame implementations remove
|
|
// and destroy not only the passed-in frame but also all its following
|
|
// in-flows (and sometimes all its following continuations in general).
|
|
// So we remove |f| from the flow first, to make sure that only |f| is
|
|
// destroyed.
|
|
// We skip this optimization if we were called during bidi resolution,
|
|
// since the bidi resolver may try to handle the destroyed frame later
|
|
// and crash
|
|
nsSplittableFrame::RemoveFromFlow(f);
|
|
f->GetParent()->RemoveFrame(nsGkAtoms::nextBidi, f);
|
|
}
|
|
f = next;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
f = this;
|
|
PRInt32 iterations = 0;
|
|
while (f && iterations < 10) {
|
|
f->GetContentLength(); // Assert if negative length
|
|
f = static_cast<nsTextFrame*>(f->GetNextContinuation());
|
|
++iterations;
|
|
}
|
|
f = this;
|
|
iterations = 0;
|
|
while (f && iterations < 10) {
|
|
f->GetContentLength(); // Assert if negative length
|
|
f = static_cast<nsTextFrame*>(f->GetPrevContinuation());
|
|
++iterations;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::IsFloatingFirstLetterChild()
|
|
{
|
|
if (!(GetStateBits() & TEXT_FIRST_LETTER))
|
|
return PR_FALSE;
|
|
nsIFrame* frame = GetParent();
|
|
if (!frame || frame->GetType() != nsGkAtoms::letterFrame)
|
|
return PR_FALSE;
|
|
return frame->GetStyleDisplay()->IsFloating();
|
|
}
|
|
|
|
struct NewlineProperty {
|
|
PRInt32 mStartOffset;
|
|
// The offset of the first \n after mStartOffset, or -1 if there is none
|
|
PRInt32 mNewlineOffset;
|
|
|
|
static void Destroy(void* aObject, nsIAtom* aPropertyName,
|
|
void* aPropertyValue, void* aData)
|
|
{
|
|
delete static_cast<NewlineProperty*>(aPropertyValue);
|
|
}
|
|
};
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("nsTextFrame");
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
|
|
|
|
// XXX If there's no line layout, we shouldn't even have created this
|
|
// frame. This may happen if, for example, this is text inside a table
|
|
// but not inside a cell. For now, just don't reflow.
|
|
if (!aReflowState.mLineLayout) {
|
|
ClearMetrics(aMetrics);
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
return NS_OK;
|
|
}
|
|
|
|
ReflowText(*aReflowState.mLineLayout, aReflowState.availableWidth,
|
|
aReflowState.rendContext, aReflowState.mFlags.mBlinks,
|
|
aMetrics, aStatus);
|
|
|
|
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsTextFrame::ReflowText(nsLineLayout& aLineLayout, nscoord aAvailableWidth,
|
|
nsRenderingContext* aRenderingContext,
|
|
PRBool aShouldBlink,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
#ifdef NOISY_REFLOW
|
|
ListTag(stdout);
|
|
printf(": BeginReflow: availableWidth=%d\n", aAvailableWidth);
|
|
#endif
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
|
|
/////////////////////////////////////////////////////////////////////
|
|
// Set up flags and clear out state
|
|
/////////////////////////////////////////////////////////////////////
|
|
|
|
// Clear out the reflow state flags in mState (without destroying
|
|
// the TEXT_BLINK_ON bit). We also clear the whitespace flags because this
|
|
// can change whether the frame maps whitespace-only text or not.
|
|
RemoveStateBits(TEXT_REFLOW_FLAGS | TEXT_WHITESPACE_FLAGS);
|
|
|
|
// Temporarily map all possible content while we construct our new textrun.
|
|
// so that when doing reflow our styles prevail over any part of the
|
|
// textrun we look at. Note that next-in-flows may be mapping the same
|
|
// content; gfxTextRun construction logic will ensure that we take priority.
|
|
PRInt32 maxContentLength = GetInFlowContentLength();
|
|
|
|
// We don't need to reflow if there is no content.
|
|
if (!maxContentLength) {
|
|
ClearMetrics(aMetrics);
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
return;
|
|
}
|
|
|
|
if (aShouldBlink) {
|
|
if (0 == (mState & TEXT_BLINK_ON)) {
|
|
mState |= TEXT_BLINK_ON;
|
|
nsBlinkTimer::AddBlinkFrame(presContext, this);
|
|
}
|
|
}
|
|
else {
|
|
if (0 != (mState & TEXT_BLINK_ON)) {
|
|
mState &= ~TEXT_BLINK_ON;
|
|
nsBlinkTimer::RemoveBlinkFrame(this);
|
|
}
|
|
}
|
|
|
|
#ifdef NOISY_BIDI
|
|
printf("Reflowed textframe\n");
|
|
#endif
|
|
|
|
const nsStyleText* textStyle = GetStyleText();
|
|
|
|
PRBool atStartOfLine = aLineLayout.LineAtStart();
|
|
if (atStartOfLine) {
|
|
AddStateBits(TEXT_START_OF_LINE);
|
|
}
|
|
|
|
PRUint32 flowEndInTextRun;
|
|
nsIFrame* lineContainer = aLineLayout.GetLineContainerFrame();
|
|
gfxContext* ctx = aRenderingContext->ThebesContext();
|
|
const nsTextFragment* frag = mContent->GetText();
|
|
|
|
// DOM offsets of the text range we need to measure, after trimming
|
|
// whitespace, restricting to first-letter, and restricting preformatted text
|
|
// to nearest newline
|
|
PRInt32 length = maxContentLength;
|
|
PRInt32 offset = GetContentOffset();
|
|
|
|
// Restrict preformatted text to the nearest newline
|
|
PRInt32 newLineOffset = -1; // this will be -1 or a content offset
|
|
PRInt32 contentNewLineOffset = -1;
|
|
// Pointer to the nsGkAtoms::newline set on this frame's element
|
|
NewlineProperty* cachedNewlineOffset = nsnull;
|
|
if (textStyle->NewlineIsSignificant()) {
|
|
cachedNewlineOffset =
|
|
static_cast<NewlineProperty*>(mContent->GetProperty(nsGkAtoms::newline));
|
|
if (cachedNewlineOffset && cachedNewlineOffset->mStartOffset <= offset &&
|
|
(cachedNewlineOffset->mNewlineOffset == -1 ||
|
|
cachedNewlineOffset->mNewlineOffset >= offset)) {
|
|
contentNewLineOffset = cachedNewlineOffset->mNewlineOffset;
|
|
} else {
|
|
contentNewLineOffset = FindChar(frag, offset,
|
|
mContent->TextLength() - offset, '\n');
|
|
}
|
|
if (contentNewLineOffset < offset + length) {
|
|
/*
|
|
The new line offset could be outside this frame if the frame has been
|
|
split by bidi resolution. In that case we won't use it in this reflow
|
|
(newLineOffset will remain -1), but we will still cache it in mContent
|
|
*/
|
|
newLineOffset = contentNewLineOffset;
|
|
}
|
|
if (newLineOffset >= 0) {
|
|
length = newLineOffset + 1 - offset;
|
|
}
|
|
}
|
|
if (atStartOfLine && !textStyle->WhiteSpaceIsSignificant()) {
|
|
// Skip leading whitespace. Make sure we don't skip a 'pre-line'
|
|
// newline if there is one.
|
|
PRInt32 skipLength = newLineOffset >= 0 ? length - 1 : length;
|
|
PRInt32 whitespaceCount =
|
|
GetTrimmableWhitespaceCount(frag, offset, skipLength, 1);
|
|
offset += whitespaceCount;
|
|
length -= whitespaceCount;
|
|
}
|
|
|
|
PRBool completedFirstLetter = PR_FALSE;
|
|
// Layout dependent styles are a problem because we need to reconstruct
|
|
// the gfxTextRun based on our layout.
|
|
if (aLineLayout.GetInFirstLetter() || aLineLayout.GetInFirstLine()) {
|
|
SetLength(maxContentLength, &aLineLayout,
|
|
ALLOW_FRAME_CREATION_AND_DESTRUCTION);
|
|
|
|
if (aLineLayout.GetInFirstLetter()) {
|
|
// floating first-letter boundaries are significant in textrun
|
|
// construction, so clear the textrun out every time we hit a first-letter
|
|
// and have changed our length (which controls the first-letter boundary)
|
|
ClearTextRun(nsnull);
|
|
// Find the length of the first-letter. We need a textrun for this.
|
|
gfxSkipCharsIterator iter =
|
|
EnsureTextRun(ctx, lineContainer, aLineLayout.GetLine(), &flowEndInTextRun);
|
|
|
|
if (mTextRun) {
|
|
PRInt32 firstLetterLength = length;
|
|
if (aLineLayout.GetFirstLetterStyleOK()) {
|
|
completedFirstLetter =
|
|
FindFirstLetterRange(frag, mTextRun, offset, iter, &firstLetterLength);
|
|
if (newLineOffset >= 0) {
|
|
// Don't allow a preformatted newline to be part of a first-letter.
|
|
firstLetterLength = NS_MIN(firstLetterLength, length - 1);
|
|
if (length == 1) {
|
|
// There is no text to be consumed by the first-letter before the
|
|
// preformatted newline. Note that the first letter is therefore
|
|
// complete (FindFirstLetterRange will have returned false).
|
|
completedFirstLetter = PR_TRUE;
|
|
}
|
|
}
|
|
} else {
|
|
// We're in a first-letter frame's first in flow, so if there
|
|
// was a first-letter, we'd be it. However, for one reason
|
|
// or another (e.g., preformatted line break before this text),
|
|
// we're not actually supposed to have first-letter style. So
|
|
// just make a zero-length first-letter.
|
|
firstLetterLength = 0;
|
|
completedFirstLetter = PR_TRUE;
|
|
}
|
|
length = firstLetterLength;
|
|
if (length) {
|
|
AddStateBits(TEXT_FIRST_LETTER);
|
|
}
|
|
// Change this frame's length to the first-letter length right now
|
|
// so that when we rebuild the textrun it will be built with the
|
|
// right first-letter boundary
|
|
SetLength(offset + length - GetContentOffset(), &aLineLayout,
|
|
ALLOW_FRAME_CREATION_AND_DESTRUCTION);
|
|
// Ensure that the textrun will be rebuilt
|
|
ClearTextRun(nsnull);
|
|
}
|
|
}
|
|
}
|
|
|
|
gfxSkipCharsIterator iter =
|
|
EnsureTextRun(ctx, lineContainer, aLineLayout.GetLine(), &flowEndInTextRun);
|
|
|
|
if (mTextRun && iter.GetOriginalEnd() < offset + length) {
|
|
// The textrun does not map enough text for this frame. This can happen
|
|
// when the textrun was ended in the middle of a text node because a
|
|
// preformatted newline was encountered, and prev-in-flow frames have
|
|
// consumed all the text of the textrun. We need a new textrun.
|
|
ClearTextRun(nsnull);
|
|
iter = EnsureTextRun(ctx, lineContainer,
|
|
aLineLayout.GetLine(), &flowEndInTextRun);
|
|
}
|
|
|
|
if (!mTextRun) {
|
|
ClearMetrics(aMetrics);
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
return;
|
|
}
|
|
|
|
NS_ASSERTION(gfxSkipCharsIterator(iter).ConvertOriginalToSkipped(offset + length)
|
|
<= mTextRun->GetLength(),
|
|
"Text run does not map enough text for our reflow");
|
|
|
|
/////////////////////////////////////////////////////////////////////
|
|
// See how much text should belong to this text frame, and measure it
|
|
/////////////////////////////////////////////////////////////////////
|
|
|
|
iter.SetOriginalOffset(offset);
|
|
nscoord xOffsetForTabs = (mTextRun->GetFlags() & nsTextFrameUtils::TEXT_HAS_TAB) ?
|
|
(aLineLayout.GetCurrentFrameXDistanceFromBlock() -
|
|
lineContainer->GetUsedBorderAndPadding().left)
|
|
: -1;
|
|
PropertyProvider provider(mTextRun, textStyle, frag, this, iter, length,
|
|
lineContainer, xOffsetForTabs);
|
|
|
|
PRUint32 transformedOffset = provider.GetStart().GetSkippedOffset();
|
|
|
|
// The metrics for the text go in here
|
|
gfxTextRun::Metrics textMetrics;
|
|
gfxFont::BoundingBoxType boundingBoxType = IsFloatingFirstLetterChild() ?
|
|
gfxFont::TIGHT_HINTED_OUTLINE_EXTENTS :
|
|
gfxFont::LOOSE_INK_EXTENTS;
|
|
NS_ASSERTION(!(NS_REFLOW_CALC_BOUNDING_METRICS & aMetrics.mFlags),
|
|
"We shouldn't be passed NS_REFLOW_CALC_BOUNDING_METRICS anymore");
|
|
|
|
PRInt32 limitLength = length;
|
|
PRInt32 forceBreak = aLineLayout.GetForcedBreakPosition(mContent);
|
|
PRBool forceBreakAfter = PR_FALSE;
|
|
if (forceBreak >= offset + length) {
|
|
forceBreakAfter = forceBreak == offset + length;
|
|
// The break is not within the text considered for this textframe.
|
|
forceBreak = -1;
|
|
}
|
|
if (forceBreak >= 0) {
|
|
limitLength = forceBreak - offset;
|
|
NS_ASSERTION(limitLength >= 0, "Weird break found!");
|
|
}
|
|
// This is the heart of text reflow right here! We don't know where
|
|
// to break, so we need to see how much text fits in the available width.
|
|
PRUint32 transformedLength;
|
|
if (offset + limitLength >= PRInt32(frag->GetLength())) {
|
|
NS_ASSERTION(offset + limitLength == PRInt32(frag->GetLength()),
|
|
"Content offset/length out of bounds");
|
|
NS_ASSERTION(flowEndInTextRun >= transformedOffset,
|
|
"Negative flow length?");
|
|
transformedLength = flowEndInTextRun - transformedOffset;
|
|
} else {
|
|
// we're not looking at all the content, so we need to compute the
|
|
// length of the transformed substring we're looking at
|
|
gfxSkipCharsIterator iter(provider.GetStart());
|
|
iter.SetOriginalOffset(offset + limitLength);
|
|
transformedLength = iter.GetSkippedOffset() - transformedOffset;
|
|
}
|
|
PRUint32 transformedLastBreak = 0;
|
|
PRBool usedHyphenation;
|
|
gfxFloat trimmedWidth = 0;
|
|
gfxFloat availWidth = aAvailableWidth;
|
|
PRBool canTrimTrailingWhitespace = !textStyle->WhiteSpaceIsSignificant();
|
|
PRInt32 unusedOffset;
|
|
gfxBreakPriority breakPriority;
|
|
aLineLayout.GetLastOptionalBreakPosition(&unusedOffset, &breakPriority);
|
|
PRUint32 transformedCharsFit =
|
|
mTextRun->BreakAndMeasureText(transformedOffset, transformedLength,
|
|
(GetStateBits() & TEXT_START_OF_LINE) != 0,
|
|
availWidth,
|
|
&provider, !aLineLayout.LineIsBreakable(),
|
|
canTrimTrailingWhitespace ? &trimmedWidth : nsnull,
|
|
&textMetrics, boundingBoxType, ctx,
|
|
&usedHyphenation, &transformedLastBreak,
|
|
textStyle->WordCanWrap(), &breakPriority);
|
|
if (!length && !textMetrics.mAscent && !textMetrics.mDescent) {
|
|
// If we're measuring a zero-length piece of text, update
|
|
// the height manually.
|
|
nsFontMetrics* fm = provider.GetFontMetrics();
|
|
if (fm) {
|
|
textMetrics.mAscent = gfxFloat(fm->MaxAscent());
|
|
textMetrics.mDescent = gfxFloat(fm->MaxDescent());
|
|
}
|
|
}
|
|
// The "end" iterator points to the first character after the string mapped
|
|
// by this frame. Basically, its original-string offset is offset+charsFit
|
|
// after we've computed charsFit.
|
|
gfxSkipCharsIterator end(provider.GetEndHint());
|
|
end.SetSkippedOffset(transformedOffset + transformedCharsFit);
|
|
PRInt32 charsFit = end.GetOriginalOffset() - offset;
|
|
if (offset + charsFit == newLineOffset) {
|
|
// We broke before a trailing preformatted '\n'. The newline should
|
|
// be assigned to this frame. Note that newLineOffset will be -1 if
|
|
// there was no preformatted newline, so we wouldn't get here in that
|
|
// case.
|
|
++charsFit;
|
|
}
|
|
// That might have taken us beyond our assigned content range (because
|
|
// we might have advanced over some skipped chars that extend outside
|
|
// this frame), so get back in.
|
|
PRInt32 lastBreak = -1;
|
|
if (charsFit >= limitLength) {
|
|
charsFit = limitLength;
|
|
if (transformedLastBreak != PR_UINT32_MAX) {
|
|
// lastBreak is needed.
|
|
// This may set lastBreak greater than 'length', but that's OK
|
|
lastBreak = end.ConvertSkippedToOriginal(transformedOffset + transformedLastBreak);
|
|
}
|
|
end.SetOriginalOffset(offset + charsFit);
|
|
// If we were forced to fit, and the break position is after a soft hyphen,
|
|
// note that this is a hyphenation break.
|
|
if ((forceBreak >= 0 || forceBreakAfter) &&
|
|
HasSoftHyphenBefore(frag, mTextRun, offset, end)) {
|
|
usedHyphenation = PR_TRUE;
|
|
}
|
|
}
|
|
if (usedHyphenation) {
|
|
// Fix up metrics to include hyphen
|
|
AddHyphenToMetrics(this, mTextRun, &textMetrics, boundingBoxType, ctx);
|
|
AddStateBits(TEXT_HYPHEN_BREAK | TEXT_HAS_NONCOLLAPSED_CHARACTERS);
|
|
}
|
|
|
|
gfxFloat trimmableWidth = 0;
|
|
PRBool brokeText = forceBreak >= 0 || transformedCharsFit < transformedLength;
|
|
if (canTrimTrailingWhitespace) {
|
|
// Optimization: if we trimmed trailing whitespace, and we can be sure
|
|
// this frame will be at the end of the line, then leave it trimmed off.
|
|
// Otherwise we have to undo the trimming, in case we're not at the end of
|
|
// the line. (If we actually do end up at the end of the line, we'll have
|
|
// to trim it off again in TrimTrailingWhiteSpace, and we'd like to avoid
|
|
// having to re-do it.)
|
|
if (brokeText) {
|
|
// We're definitely going to break so our trailing whitespace should
|
|
// definitely be timmed. Record that we've already done it.
|
|
AddStateBits(TEXT_TRIMMED_TRAILING_WHITESPACE);
|
|
} else {
|
|
// We might not be at the end of the line. (Note that even if this frame
|
|
// ends in breakable whitespace, it might not be at the end of the line
|
|
// because it might be followed by breakable, but preformatted, whitespace.)
|
|
// Undo the trimming.
|
|
textMetrics.mAdvanceWidth += trimmedWidth;
|
|
trimmableWidth = trimmedWidth;
|
|
if (mTextRun->IsRightToLeft()) {
|
|
// Space comes before text, so the bounding box is moved to the
|
|
// right by trimmdWidth
|
|
textMetrics.mBoundingBox.MoveBy(gfxPoint(trimmedWidth, 0));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!brokeText && lastBreak >= 0) {
|
|
// Since everything fit and no break was forced,
|
|
// record the last break opportunity
|
|
NS_ASSERTION(textMetrics.mAdvanceWidth - trimmableWidth <= aAvailableWidth,
|
|
"If the text doesn't fit, and we have a break opportunity, why didn't MeasureText use it?");
|
|
aLineLayout.NotifyOptionalBreakPosition(mContent, lastBreak, PR_TRUE, breakPriority);
|
|
}
|
|
|
|
PRInt32 contentLength = offset + charsFit - GetContentOffset();
|
|
|
|
/////////////////////////////////////////////////////////////////////
|
|
// Compute output metrics
|
|
/////////////////////////////////////////////////////////////////////
|
|
|
|
// first-letter frames should use the tight bounding box metrics for ascent/descent
|
|
// for good drop-cap effects
|
|
if (GetStateBits() & TEXT_FIRST_LETTER) {
|
|
textMetrics.mAscent = NS_MAX(gfxFloat(0.0), -textMetrics.mBoundingBox.Y());
|
|
textMetrics.mDescent = NS_MAX(gfxFloat(0.0), textMetrics.mBoundingBox.YMost());
|
|
}
|
|
|
|
// Setup metrics for caller
|
|
// Disallow negative widths
|
|
aMetrics.width = NSToCoordCeil(NS_MAX(gfxFloat(0.0), textMetrics.mAdvanceWidth));
|
|
|
|
if (completedFirstLetter && transformedCharsFit == 0 && !usedHyphenation) {
|
|
aMetrics.ascent = 0;
|
|
aMetrics.height = 0;
|
|
} else if (boundingBoxType != gfxFont::LOOSE_INK_EXTENTS) {
|
|
// Use actual text metrics for floating first letter frame.
|
|
aMetrics.ascent = NSToCoordCeil(textMetrics.mAscent);
|
|
aMetrics.height = aMetrics.ascent + NSToCoordCeil(textMetrics.mDescent);
|
|
} else {
|
|
// Otherwise, ascent should contain the overline drawable area.
|
|
// And also descent should contain the underline drawable area.
|
|
// nsFontMetrics::GetMaxAscent/GetMaxDescent contains them.
|
|
nsFontMetrics* fm = provider.GetFontMetrics();
|
|
nscoord fontAscent = fm->MaxAscent();
|
|
nscoord fontDescent = fm->MaxDescent();
|
|
aMetrics.ascent = NS_MAX(NSToCoordCeil(textMetrics.mAscent), fontAscent);
|
|
nscoord descent = NS_MAX(NSToCoordCeil(textMetrics.mDescent), fontDescent);
|
|
aMetrics.height = aMetrics.ascent + descent;
|
|
}
|
|
|
|
NS_ASSERTION(aMetrics.ascent >= 0, "Negative ascent???");
|
|
NS_ASSERTION(aMetrics.height - aMetrics.ascent >= 0, "Negative descent???");
|
|
|
|
mAscent = aMetrics.ascent;
|
|
|
|
// Handle text that runs outside its normal bounds.
|
|
nsRect boundingBox = RoundOut(textMetrics.mBoundingBox) + nsPoint(0, mAscent);
|
|
aMetrics.SetOverflowAreasToDesiredBounds();
|
|
aMetrics.VisualOverflow().UnionRect(aMetrics.VisualOverflow(), boundingBox);
|
|
|
|
UnionTextDecorationOverflow(presContext, provider, &aMetrics.VisualOverflow());
|
|
|
|
/////////////////////////////////////////////////////////////////////
|
|
// Clean up, update state
|
|
/////////////////////////////////////////////////////////////////////
|
|
|
|
// If all our characters are discarded or collapsed, then trimmable width
|
|
// from the last textframe should be preserved. Otherwise the trimmable width
|
|
// from this textframe overrides. (Currently in CSS trimmable width can be
|
|
// at most one space so there's no way for trimmable width from a previous
|
|
// frame to accumulate with trimmable width from this frame.)
|
|
if (transformedCharsFit > 0) {
|
|
aLineLayout.SetTrimmableWidth(NSToCoordFloor(trimmableWidth));
|
|
AddStateBits(TEXT_HAS_NONCOLLAPSED_CHARACTERS);
|
|
}
|
|
if (charsFit > 0 && charsFit == length &&
|
|
textStyle->mHyphens != NS_STYLE_HYPHENS_NONE &&
|
|
HasSoftHyphenBefore(frag, mTextRun, offset, end)) {
|
|
// Record a potential break after final soft hyphen
|
|
aLineLayout.NotifyOptionalBreakPosition(mContent, offset + length,
|
|
textMetrics.mAdvanceWidth + provider.GetHyphenWidth() <= availWidth,
|
|
eNormalBreak);
|
|
}
|
|
PRBool breakAfter = forceBreakAfter;
|
|
// length == 0 means either the text is empty or it's all collapsed away
|
|
PRBool emptyTextAtStartOfLine = atStartOfLine && length == 0;
|
|
if (!breakAfter && charsFit == length && !emptyTextAtStartOfLine &&
|
|
transformedOffset + transformedLength == mTextRun->GetLength() &&
|
|
(mTextRun->GetFlags() & nsTextFrameUtils::TEXT_HAS_TRAILING_BREAK)) {
|
|
// We placed all the text in the textrun and we have a break opportunity at
|
|
// the end of the textrun. We need to record it because the following
|
|
// content may not care about nsLineBreaker.
|
|
|
|
// Note that because we didn't break, we can be sure that (thanks to the
|
|
// code up above) textMetrics.mAdvanceWidth includes the width of any
|
|
// trailing whitespace. So we need to subtract trimmableWidth here
|
|
// because if we did break at this point, that much width would be trimmed.
|
|
if (textMetrics.mAdvanceWidth - trimmableWidth > availWidth) {
|
|
breakAfter = PR_TRUE;
|
|
} else {
|
|
aLineLayout.NotifyOptionalBreakPosition(mContent, offset + length,
|
|
PR_TRUE, eNormalBreak);
|
|
}
|
|
}
|
|
|
|
// Compute reflow status
|
|
aStatus = contentLength == maxContentLength
|
|
? NS_FRAME_COMPLETE : NS_FRAME_NOT_COMPLETE;
|
|
|
|
if (charsFit == 0 && length > 0 && !usedHyphenation) {
|
|
// Couldn't place any text
|
|
aStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
} else if (contentLength > 0 && mContentOffset + contentLength - 1 == newLineOffset) {
|
|
// Ends in \n
|
|
aStatus = NS_INLINE_LINE_BREAK_AFTER(aStatus);
|
|
aLineLayout.SetLineEndsInBR(PR_TRUE);
|
|
} else if (breakAfter) {
|
|
aStatus = NS_INLINE_LINE_BREAK_AFTER(aStatus);
|
|
}
|
|
if (completedFirstLetter) {
|
|
aLineLayout.SetFirstLetterStyleOK(PR_FALSE);
|
|
aStatus |= NS_INLINE_BREAK_FIRST_LETTER_COMPLETE;
|
|
}
|
|
|
|
// Updated the cached NewlineProperty, or delete it.
|
|
if (contentLength < maxContentLength &&
|
|
textStyle->NewlineIsSignificant() &&
|
|
(contentNewLineOffset < 0 ||
|
|
mContentOffset + contentLength <= contentNewLineOffset)) {
|
|
if (!cachedNewlineOffset) {
|
|
cachedNewlineOffset = new NewlineProperty;
|
|
if (cachedNewlineOffset) {
|
|
if (NS_FAILED(mContent->SetProperty(nsGkAtoms::newline, cachedNewlineOffset,
|
|
NewlineProperty::Destroy))) {
|
|
delete cachedNewlineOffset;
|
|
cachedNewlineOffset = nsnull;
|
|
}
|
|
}
|
|
}
|
|
if (cachedNewlineOffset) {
|
|
cachedNewlineOffset->mStartOffset = offset;
|
|
cachedNewlineOffset->mNewlineOffset = contentNewLineOffset;
|
|
}
|
|
} else if (cachedNewlineOffset) {
|
|
mContent->DeleteProperty(nsGkAtoms::newline);
|
|
}
|
|
|
|
// Compute space and letter counts for justification, if required
|
|
if (!textStyle->WhiteSpaceIsSignificant() &&
|
|
lineContainer->GetStyleText()->mTextAlign == NS_STYLE_TEXT_ALIGN_JUSTIFY) {
|
|
AddStateBits(TEXT_JUSTIFICATION_ENABLED); // This will include a space for trailing whitespace, if any is present.
|
|
// This is corrected for in nsLineLayout::TrimWhiteSpaceIn.
|
|
PRInt32 numJustifiableCharacters =
|
|
provider.ComputeJustifiableCharacters(offset, charsFit);
|
|
|
|
NS_ASSERTION(numJustifiableCharacters <= charsFit,
|
|
"Bad justifiable character count");
|
|
aLineLayout.SetTextJustificationWeights(numJustifiableCharacters,
|
|
charsFit - numJustifiableCharacters);
|
|
}
|
|
|
|
SetLength(contentLength, &aLineLayout, ALLOW_FRAME_CREATION_AND_DESTRUCTION);
|
|
|
|
if (mContent->HasFlag(NS_TEXT_IN_SELECTION)) {
|
|
SelectionDetails* details = GetSelectionDetails();
|
|
if (details) {
|
|
AddStateBits(NS_FRAME_SELECTED_CONTENT);
|
|
DestroySelectionDetails(details);
|
|
} else {
|
|
RemoveStateBits(NS_FRAME_SELECTED_CONTENT);
|
|
}
|
|
}
|
|
|
|
Invalidate(aMetrics.VisualOverflow());
|
|
|
|
#ifdef NOISY_REFLOW
|
|
ListTag(stdout);
|
|
printf(": desiredSize=%d,%d(b=%d) status=%x\n",
|
|
aMetrics.width, aMetrics.height, aMetrics.ascent,
|
|
aStatus);
|
|
#endif
|
|
|
|
#ifdef ACCESSIBILITY
|
|
// Schedule the update of accessible tree when rendered text might be changed.
|
|
nsAccessibilityService* accService = nsIPresShell::AccService();
|
|
if (accService) {
|
|
accService->UpdateText(presContext->PresShell(), mContent);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* virtual */ PRBool
|
|
nsTextFrame::CanContinueTextRun() const
|
|
{
|
|
// We can continue a text run through a text frame
|
|
return PR_TRUE;
|
|
}
|
|
|
|
nsTextFrame::TrimOutput
|
|
nsTextFrame::TrimTrailingWhiteSpace(nsRenderingContext* aRC)
|
|
{
|
|
TrimOutput result;
|
|
result.mChanged = PR_FALSE;
|
|
result.mLastCharIsJustifiable = PR_FALSE;
|
|
result.mDeltaWidth = 0;
|
|
|
|
AddStateBits(TEXT_END_OF_LINE);
|
|
|
|
PRInt32 contentLength = GetContentLength();
|
|
if (!contentLength)
|
|
return result;
|
|
|
|
gfxContext* ctx = aRC->ThebesContext();
|
|
gfxSkipCharsIterator start = EnsureTextRun(ctx);
|
|
NS_ENSURE_TRUE(mTextRun, result);
|
|
|
|
PRUint32 trimmedStart = start.GetSkippedOffset();
|
|
|
|
const nsTextFragment* frag = mContent->GetText();
|
|
TrimmedOffsets trimmed = GetTrimmedOffsets(frag, PR_TRUE);
|
|
gfxSkipCharsIterator trimmedEndIter = start;
|
|
const nsStyleText* textStyle = GetStyleText();
|
|
gfxFloat delta = 0;
|
|
PRUint32 trimmedEnd = trimmedEndIter.ConvertOriginalToSkipped(trimmed.GetEnd());
|
|
|
|
if (GetStateBits() & TEXT_TRIMMED_TRAILING_WHITESPACE) {
|
|
// We pre-trimmed this frame, so the last character is justifiable
|
|
result.mLastCharIsJustifiable = PR_TRUE;
|
|
} else if (trimmed.GetEnd() < GetContentEnd()) {
|
|
gfxSkipCharsIterator end = trimmedEndIter;
|
|
PRUint32 endOffset = end.ConvertOriginalToSkipped(GetContentOffset() + contentLength);
|
|
if (trimmedEnd < endOffset) {
|
|
// We can't be dealing with tabs here ... they wouldn't be trimmed. So it's
|
|
// OK to pass null for the line container.
|
|
PropertyProvider provider(mTextRun, textStyle, frag, this, start, contentLength,
|
|
nsnull, 0);
|
|
delta = mTextRun->GetAdvanceWidth(trimmedEnd, endOffset - trimmedEnd, &provider);
|
|
// non-compressed whitespace being skipped at end of line -> justifiable
|
|
// XXX should we actually *count* justifiable characters that should be
|
|
// removed from the overall count? I think so...
|
|
result.mLastCharIsJustifiable = PR_TRUE;
|
|
result.mChanged = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
if (!result.mLastCharIsJustifiable &&
|
|
(GetStateBits() & TEXT_JUSTIFICATION_ENABLED)) {
|
|
// Check if any character in the last cluster is justifiable
|
|
PropertyProvider provider(mTextRun, textStyle, frag, this, start, contentLength,
|
|
nsnull, 0);
|
|
PRBool isCJK = IsChineseOrJapanese(this);
|
|
gfxSkipCharsIterator justificationStart(start), justificationEnd(trimmedEndIter);
|
|
provider.FindJustificationRange(&justificationStart, &justificationEnd);
|
|
|
|
PRInt32 i;
|
|
for (i = justificationEnd.GetOriginalOffset(); i < trimmed.GetEnd(); ++i) {
|
|
if (IsJustifiableCharacter(frag, i, isCJK)) {
|
|
result.mLastCharIsJustifiable = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
gfxFloat advanceDelta;
|
|
mTextRun->SetLineBreaks(trimmedStart, trimmedEnd - trimmedStart,
|
|
(GetStateBits() & TEXT_START_OF_LINE) != 0, PR_TRUE,
|
|
&advanceDelta, ctx);
|
|
if (advanceDelta != 0) {
|
|
result.mChanged = PR_TRUE;
|
|
}
|
|
|
|
// aDeltaWidth is *subtracted* from our width.
|
|
// If advanceDelta is positive then setting the line break made us longer,
|
|
// so aDeltaWidth could go negative.
|
|
result.mDeltaWidth = NSToCoordFloor(delta - advanceDelta);
|
|
// If aDeltaWidth goes negative, that means this frame might not actually fit
|
|
// anymore!!! We need higher level line layout to recover somehow.
|
|
// If it's because the frame has a soft hyphen that is now being displayed,
|
|
// this should actually be OK, because our reflow recorded the break
|
|
// opportunity that allowed the soft hyphen to be used, and we wouldn't
|
|
// have recorded the opportunity unless the hyphen fit (or was the first
|
|
// opportunity on the line).
|
|
// Otherwise this can/ really only happen when we have glyphs with special
|
|
// shapes at the end of lines, I think. Breaking inside a kerning pair won't
|
|
// do it because that would mean we broke inside this textrun, and
|
|
// BreakAndMeasureText should make sure the resulting shaped substring fits.
|
|
// Maybe if we passed a maxTextLength? But that only happens at direction
|
|
// changes (so we wouldn't kern across the boundary) or for first-letter
|
|
// (which always fits because it starts the line!).
|
|
NS_WARN_IF_FALSE(result.mDeltaWidth >= 0,
|
|
"Negative deltawidth, something odd is happening");
|
|
|
|
#ifdef NOISY_TRIM
|
|
ListTag(stdout);
|
|
printf(": trim => %d\n", result.mDeltaWidth);
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
nsOverflowAreas
|
|
nsTextFrame::RecomputeOverflow()
|
|
{
|
|
nsRect bounds(nsPoint(0, 0), GetSize());
|
|
nsOverflowAreas result(bounds, bounds);
|
|
|
|
gfxSkipCharsIterator iter = EnsureTextRun();
|
|
if (!mTextRun)
|
|
return result;
|
|
|
|
PropertyProvider provider(this, iter);
|
|
provider.InitializeForDisplay(PR_TRUE);
|
|
|
|
gfxTextRun::Metrics textMetrics =
|
|
mTextRun->MeasureText(provider.GetStart().GetSkippedOffset(),
|
|
ComputeTransformedLength(provider),
|
|
gfxFont::LOOSE_INK_EXTENTS, nsnull,
|
|
&provider);
|
|
|
|
nsRect &vis = result.VisualOverflow();
|
|
vis.UnionRect(vis, RoundOut(textMetrics.mBoundingBox) + nsPoint(0, mAscent));
|
|
|
|
UnionTextDecorationOverflow(PresContext(), provider, &vis);
|
|
|
|
return result;
|
|
}
|
|
|
|
static PRUnichar TransformChar(const nsStyleText* aStyle, gfxTextRun* aTextRun,
|
|
PRUint32 aSkippedOffset, PRUnichar aChar)
|
|
{
|
|
if (aChar == '\n') {
|
|
return aStyle->NewlineIsSignificant() ? aChar : ' ';
|
|
}
|
|
switch (aStyle->mTextTransform) {
|
|
case NS_STYLE_TEXT_TRANSFORM_LOWERCASE:
|
|
aChar = ToLowerCase(aChar);
|
|
break;
|
|
case NS_STYLE_TEXT_TRANSFORM_UPPERCASE:
|
|
aChar = ToUpperCase(aChar);
|
|
break;
|
|
case NS_STYLE_TEXT_TRANSFORM_CAPITALIZE:
|
|
if (aTextRun->CanBreakLineBefore(aSkippedOffset)) {
|
|
aChar = ToTitleCase(aChar);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return aChar;
|
|
}
|
|
|
|
nsresult nsTextFrame::GetRenderedText(nsAString* aAppendToString,
|
|
gfxSkipChars* aSkipChars,
|
|
gfxSkipCharsIterator* aSkipIter,
|
|
PRUint32 aSkippedStartOffset,
|
|
PRUint32 aSkippedMaxLength)
|
|
{
|
|
// The handling of aSkippedStartOffset and aSkippedMaxLength could be more efficient...
|
|
gfxSkipCharsBuilder skipCharsBuilder;
|
|
nsTextFrame* textFrame;
|
|
const nsTextFragment* textFrag = mContent->GetText();
|
|
PRUint32 keptCharsLength = 0;
|
|
PRUint32 validCharsLength = 0;
|
|
|
|
// Build skipChars and copy text, for each text frame in this continuation block
|
|
for (textFrame = this; textFrame;
|
|
textFrame = static_cast<nsTextFrame*>(textFrame->GetNextContinuation())) {
|
|
// For each text frame continuation in this block ...
|
|
|
|
// Ensure the text run and grab the gfxSkipCharsIterator for it
|
|
gfxSkipCharsIterator iter = textFrame->EnsureTextRun();
|
|
if (!textFrame->mTextRun)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
// Skip to the start of the text run, past ignored chars at start of line
|
|
// XXX In the future we may decide to trim extra spaces before a hard line
|
|
// break, in which case we need to accurately detect those sitations and
|
|
// call GetTrimmedOffsets() with PR_TRUE to trim whitespace at the line's end
|
|
TrimmedOffsets trimmedContentOffsets = textFrame->GetTrimmedOffsets(textFrag, PR_FALSE);
|
|
PRInt32 startOfLineSkipChars = trimmedContentOffsets.mStart - textFrame->mContentOffset;
|
|
if (startOfLineSkipChars > 0) {
|
|
skipCharsBuilder.SkipChars(startOfLineSkipChars);
|
|
iter.SetOriginalOffset(trimmedContentOffsets.mStart);
|
|
}
|
|
|
|
// Keep and copy the appropriate chars withing the caller's requested range
|
|
const nsStyleText* textStyle = textFrame->GetStyleText();
|
|
while (iter.GetOriginalOffset() < trimmedContentOffsets.GetEnd() &&
|
|
keptCharsLength < aSkippedMaxLength) {
|
|
// For each original char from content text
|
|
if (iter.IsOriginalCharSkipped() || ++validCharsLength <= aSkippedStartOffset) {
|
|
skipCharsBuilder.SkipChar();
|
|
} else {
|
|
++keptCharsLength;
|
|
skipCharsBuilder.KeepChar();
|
|
if (aAppendToString) {
|
|
aAppendToString->Append(
|
|
TransformChar(textStyle, textFrame->mTextRun, iter.GetSkippedOffset(),
|
|
textFrag->CharAt(iter.GetOriginalOffset())));
|
|
}
|
|
}
|
|
iter.AdvanceOriginal(1);
|
|
}
|
|
if (keptCharsLength >= aSkippedMaxLength) {
|
|
break; // Already past the end, don't build string or gfxSkipCharsIter anymore
|
|
}
|
|
}
|
|
|
|
if (aSkipChars) {
|
|
aSkipChars->TakeFrom(&skipCharsBuilder); // Copy skipChars into aSkipChars
|
|
if (aSkipIter) {
|
|
// Caller must provide both pointers in order to retrieve a gfxSkipCharsIterator,
|
|
// because the gfxSkipCharsIterator holds a weak pointer to the gfxSkipCars.
|
|
*aSkipIter = gfxSkipCharsIterator(*aSkipChars, GetContentLength());
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// Translate the mapped content into a string that's printable
|
|
void
|
|
nsTextFrame::ToCString(nsCString& aBuf, PRInt32* aTotalContentLength) const
|
|
{
|
|
// Get the frames text content
|
|
const nsTextFragment* frag = mContent->GetText();
|
|
if (!frag) {
|
|
return;
|
|
}
|
|
|
|
// Compute the total length of the text content.
|
|
*aTotalContentLength = frag->GetLength();
|
|
|
|
PRInt32 contentLength = GetContentLength();
|
|
// Set current fragment and current fragment offset
|
|
if (0 == contentLength) {
|
|
return;
|
|
}
|
|
PRInt32 fragOffset = GetContentOffset();
|
|
PRInt32 n = fragOffset + contentLength;
|
|
while (fragOffset < n) {
|
|
PRUnichar ch = frag->CharAt(fragOffset++);
|
|
if (ch == '\r') {
|
|
aBuf.AppendLiteral("\\r");
|
|
} else if (ch == '\n') {
|
|
aBuf.AppendLiteral("\\n");
|
|
} else if (ch == '\t') {
|
|
aBuf.AppendLiteral("\\t");
|
|
} else if ((ch < ' ') || (ch >= 127)) {
|
|
aBuf.Append(nsPrintfCString("\\u%04x", ch));
|
|
} else {
|
|
aBuf.Append(ch);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
nsIAtom*
|
|
nsTextFrame::GetType() const
|
|
{
|
|
return nsGkAtoms::textFrame;
|
|
}
|
|
|
|
/* virtual */ PRBool
|
|
nsTextFrame::IsEmpty()
|
|
{
|
|
NS_ASSERTION(!(mState & TEXT_IS_ONLY_WHITESPACE) ||
|
|
!(mState & TEXT_ISNOT_ONLY_WHITESPACE),
|
|
"Invalid state");
|
|
|
|
// XXXldb Should this check compatibility mode as well???
|
|
const nsStyleText* textStyle = GetStyleText();
|
|
if (textStyle->WhiteSpaceIsSignificant()) {
|
|
// XXX shouldn't we return true if the length is zero?
|
|
return PR_FALSE;
|
|
}
|
|
|
|
if (mState & TEXT_ISNOT_ONLY_WHITESPACE) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
if (mState & TEXT_IS_ONLY_WHITESPACE) {
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRBool isEmpty = IsAllWhitespace(mContent->GetText(),
|
|
textStyle->mWhiteSpace != NS_STYLE_WHITESPACE_PRE_LINE);
|
|
mState |= (isEmpty ? TEXT_IS_ONLY_WHITESPACE : TEXT_ISNOT_ONLY_WHITESPACE);
|
|
return isEmpty;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetFrameName(nsAString& aResult) const
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("Text"), aResult);
|
|
}
|
|
|
|
NS_IMETHODIMP_(nsFrameState)
|
|
nsTextFrame::GetDebugStateBits() const
|
|
{
|
|
// mask out our emptystate flags; those are just caches
|
|
return nsFrame::GetDebugStateBits() &
|
|
~(TEXT_WHITESPACE_FLAGS | TEXT_REFLOW_FLAGS);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::List(FILE* out, PRInt32 aIndent) const
|
|
{
|
|
// Output the tag
|
|
IndentBy(out, aIndent);
|
|
ListTag(out);
|
|
if (HasView()) {
|
|
fprintf(out, " [view=%p]", static_cast<void*>(GetView()));
|
|
}
|
|
fprintf(out, " [run=%p]", static_cast<void*>(mTextRun));
|
|
|
|
PRInt32 totalContentLength;
|
|
nsCAutoString tmp;
|
|
ToCString(tmp, &totalContentLength);
|
|
|
|
// Output the first/last content offset and prev/next in flow info
|
|
PRBool isComplete = GetContentEnd() == totalContentLength;
|
|
fprintf(out, "[%d,%d,%c] ",
|
|
GetContentOffset(), GetContentLength(),
|
|
isComplete ? 'T':'F');
|
|
|
|
if (GetNextSibling()) {
|
|
fprintf(out, " next=%p", static_cast<void*>(GetNextSibling()));
|
|
}
|
|
nsIFrame* prevContinuation = GetPrevContinuation();
|
|
if (nsnull != prevContinuation) {
|
|
fprintf(out, " prev-continuation=%p", static_cast<void*>(prevContinuation));
|
|
}
|
|
if (nsnull != mNextContinuation) {
|
|
fprintf(out, " next-continuation=%p", static_cast<void*>(mNextContinuation));
|
|
}
|
|
|
|
// Output the rect and state
|
|
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
|
|
if (0 != mState) {
|
|
if (mState & NS_FRAME_SELECTED_CONTENT) {
|
|
fprintf(out, " [state=%016llx] SELECTED", mState);
|
|
} else {
|
|
fprintf(out, " [state=%016llx]", mState);
|
|
}
|
|
}
|
|
fprintf(out, " [content=%p]", static_cast<void*>(mContent));
|
|
if (HasOverflowAreas()) {
|
|
nsRect overflowArea = GetVisualOverflowRect();
|
|
fprintf(out, " [vis-overflow=%d,%d,%d,%d]",
|
|
overflowArea.x, overflowArea.y,
|
|
overflowArea.width, overflowArea.height);
|
|
overflowArea = GetScrollableOverflowRect();
|
|
fprintf(out, " [scr-overflow=%d,%d,%d,%d]",
|
|
overflowArea.x, overflowArea.y,
|
|
overflowArea.width, overflowArea.height);
|
|
}
|
|
fprintf(out, " sc=%p", static_cast<void*>(mStyleContext));
|
|
nsIAtom* pseudoTag = mStyleContext->GetPseudo();
|
|
if (pseudoTag) {
|
|
nsAutoString atomString;
|
|
pseudoTag->ToString(atomString);
|
|
fprintf(out, " pst=%s",
|
|
NS_LossyConvertUTF16toASCII(atomString).get());
|
|
}
|
|
fputs("<\n", out);
|
|
|
|
// Output the text
|
|
aIndent++;
|
|
|
|
IndentBy(out, aIndent);
|
|
fputs("\"", out);
|
|
fputs(tmp.get(), out);
|
|
fputs("\"\n", out);
|
|
|
|
aIndent--;
|
|
IndentBy(out, aIndent);
|
|
fputs(">\n", out);
|
|
|
|
return NS_OK;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
nsTextFrame::AdjustOffsetsForBidi(PRInt32 aStart, PRInt32 aEnd)
|
|
{
|
|
AddStateBits(NS_FRAME_IS_BIDI);
|
|
mContent->DeleteProperty(nsGkAtoms::flowlength);
|
|
|
|
/*
|
|
* After Bidi resolution we may need to reassign text runs.
|
|
* This is called during bidi resolution from the block container, so we
|
|
* shouldn't be holding a local reference to a textrun anywhere.
|
|
*/
|
|
ClearTextRun(nsnull);
|
|
|
|
nsTextFrame* prev = static_cast<nsTextFrame*>(GetPrevContinuation());
|
|
if (prev) {
|
|
// the bidi resolver can be very evil when columns/pages are involved. Don't
|
|
// let it violate our invariants.
|
|
PRInt32 prevOffset = prev->GetContentOffset();
|
|
aStart = NS_MAX(aStart, prevOffset);
|
|
aEnd = NS_MAX(aEnd, prevOffset);
|
|
prev->ClearTextRun(nsnull);
|
|
}
|
|
|
|
mContentOffset = aStart;
|
|
SetLength(aEnd - aStart, nsnull, 0);
|
|
}
|
|
|
|
/**
|
|
* @return PR_TRUE if this text frame ends with a newline character. It should return
|
|
* PR_FALSE if it is not a text frame.
|
|
*/
|
|
PRBool
|
|
nsTextFrame::HasTerminalNewline() const
|
|
{
|
|
return ::HasTerminalNewline(this);
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::IsAtEndOfLine() const
|
|
{
|
|
return (GetStateBits() & TEXT_END_OF_LINE) != 0;
|
|
}
|
|
|
|
nscoord
|
|
nsTextFrame::GetBaseline() const
|
|
{
|
|
return mAscent;
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::HasAnyNoncollapsedCharacters()
|
|
{
|
|
gfxSkipCharsIterator iter = EnsureTextRun();
|
|
PRInt32 offset = GetContentOffset(),
|
|
offsetEnd = GetContentEnd();
|
|
PRInt32 skippedOffset = iter.ConvertOriginalToSkipped(offset);
|
|
PRInt32 skippedOffsetEnd = iter.ConvertOriginalToSkipped(offsetEnd);
|
|
return skippedOffset != skippedOffsetEnd;
|
|
}
|