зеркало из https://github.com/mozilla/pjs.git
187 строки
5.6 KiB
C++
187 строки
5.6 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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*
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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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#include "nsHTMLParts.h"
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#include "nsFrame.h"
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#include "nsLineLayout.h"
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#include "nsPresContext.h"
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#include "nsHTMLAtoms.h"
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#include "nsUnitConversion.h"
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#include "nsStyleConsts.h"
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#include "nsINameSpaceManager.h"
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// Spacer type's
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#define TYPE_WORD 0 // horizontal space
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#define TYPE_LINE 1 // line-break + vertical space
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#define TYPE_IMAGE 2 // acts like a sized image with nothing to see
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class SpacerFrame : public nsFrame {
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public:
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friend nsresult NS_NewSpacerFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);
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// nsIHTMLReflow
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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PRUint8 GetType();
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protected:
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SpacerFrame();
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virtual ~SpacerFrame();
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};
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nsresult
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NS_NewSpacerFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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SpacerFrame* it = new (aPresShell) SpacerFrame;
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*aNewFrame = it;
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return NS_OK;
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}
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SpacerFrame::SpacerFrame()
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{
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}
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SpacerFrame::~SpacerFrame()
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{
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}
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NS_IMETHODIMP
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SpacerFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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DO_GLOBAL_REFLOW_COUNT("SpacerFrame", aReflowState.reason);
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
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aStatus = NS_FRAME_COMPLETE;
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// By default, we have no area
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aMetrics.width = 0;
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aMetrics.height = 0;
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aMetrics.ascent = 0;
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aMetrics.descent = 0;
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const nsStylePosition* position = GetStylePosition();
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PRUint8 type = GetType();
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switch (type) {
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case TYPE_WORD:
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break;
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case TYPE_LINE:
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aStatus = NS_INLINE_LINE_BREAK_AFTER(NS_FRAME_COMPLETE);
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if (eStyleUnit_Coord == position->mHeight.GetUnit()) {
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aMetrics.width = position->mHeight.GetCoordValue();
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}
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aMetrics.ascent = aMetrics.height;
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break;
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case TYPE_IMAGE:
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// width
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nsStyleUnit unit = position->mWidth.GetUnit();
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if (eStyleUnit_Coord == unit) {
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aMetrics.width = position->mWidth.GetCoordValue();
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}
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else if (eStyleUnit_Percent == unit)
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{
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if (NS_UNCONSTRAINEDSIZE != aReflowState.availableWidth)
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{
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float factor = position->mWidth.GetPercentValue();
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aMetrics.width = NSToCoordRound (factor * aReflowState.availableWidth);
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}
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}
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// height
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unit = position->mHeight.GetUnit();
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if (eStyleUnit_Coord == unit) {
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aMetrics.height = position->mHeight.GetCoordValue();
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}
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else if (eStyleUnit_Percent == unit)
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{
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if (NS_UNCONSTRAINEDSIZE != aReflowState.availableHeight)
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{
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float factor = position->mHeight.GetPercentValue();
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aMetrics.width = NSToCoordRound (factor * aReflowState.availableHeight);
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}
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}
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// accent
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aMetrics.ascent = aMetrics.height;
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break;
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}
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if (aMetrics.width || aMetrics.height) {
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// Make sure that the other dimension is non-zero
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if (!aMetrics.width) aMetrics.width = 1;
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if (!aMetrics.height) aMetrics.height = 1;
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}
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if (aMetrics.mComputeMEW) {
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aMetrics.mMaxElementWidth = aMetrics.width;
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}
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
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return NS_OK;
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}
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PRUint8
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SpacerFrame::GetType()
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{
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PRUint8 type = TYPE_WORD;
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nsAutoString value;
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if (NS_CONTENT_ATTR_HAS_VALUE ==
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mContent->GetAttr(kNameSpaceID_None, nsHTMLAtoms::type, value)) {
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if (value.LowerCaseEqualsLiteral("line") ||
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value.LowerCaseEqualsLiteral("vert") ||
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value.LowerCaseEqualsLiteral("vertical")) {
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return TYPE_LINE;
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}
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if (value.LowerCaseEqualsLiteral("block")) {
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return TYPE_IMAGE;
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}
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}
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return type;
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}
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