зеркало из https://github.com/mozilla/gecko-dev.git
600 строки
22 KiB
C++
600 строки
22 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 "nsHTMLContainerFrame.h"
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#include "nsIRenderingContext.h"
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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#include "nsStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsIContent.h"
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#include "nsLayoutAtoms.h"
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#include "nsLayoutUtils.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsIWidget.h"
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#include "nsILinkHandler.h"
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#include "nsGUIEvent.h"
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#include "nsIDocument.h"
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#include "nsIURL.h"
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#include "nsPlaceholderFrame.h"
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#include "nsHTMLParts.h"
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#include "nsIView.h"
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#include "nsIViewManager.h"
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#include "nsIDOMEvent.h"
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#include "nsIScrollableView.h"
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#include "nsWidgetsCID.h"
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#include "nsCOMPtr.h"
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#include "nsIDeviceContext.h"
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#include "nsIFontMetrics.h"
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#include "nsReflowPath.h"
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#include "nsCSSFrameConstructor.h"
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NS_IMETHODIMP
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nsHTMLContainerFrame::Paint(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags)
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{
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if (NS_FRAME_IS_UNFLOWABLE & mState) {
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return NS_OK;
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}
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// Paint inline element backgrounds in the foreground layer, but
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// others in the background (bug 36710). (nsInlineFrame::Paint does
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// this differently.)
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if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
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PaintSelf(aPresContext, aRenderingContext, aDirtyRect);
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}
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PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer, aFlags);
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return NS_OK;
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}
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void
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nsHTMLContainerFrame::PaintDecorationsAndChildren(
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nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRBool aIsBlock,
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PRUint32 aFlags)
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{
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// Do standards mode painting of 'text-decoration's: under+overline
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// behind children, line-through in front. For Quirks mode, see
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// nsTextFrame::PaintTextDecorations. (See bug 1777.)
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nscolor underColor, overColor, strikeColor;
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PRUint8 decorations = NS_STYLE_TEXT_DECORATION_NONE;
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nsCOMPtr<nsIFontMetrics> fm;
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PRBool isVisible;
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if (eCompatibility_NavQuirks != aPresContext->CompatibilityMode() &&
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NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer &&
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NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext,
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PR_TRUE, &isVisible)) &&
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isVisible) {
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GetTextDecorations(aPresContext, aIsBlock, decorations, underColor,
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overColor, strikeColor);
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if (decorations & (NS_STYLE_TEXT_DECORATION_UNDERLINE |
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NS_STYLE_TEXT_DECORATION_OVERLINE |
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NS_STYLE_TEXT_DECORATION_LINE_THROUGH)) {
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const nsStyleFont* font = GetStyleFont();
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NS_ASSERTION(font->mFont.decorations == NS_FONT_DECORATION_NONE,
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"fonts on style structs shouldn't have decorations");
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// XXX This is relatively slow and shouldn't need to be used here.
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nsCOMPtr<nsIDeviceContext> deviceContext;
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aRenderingContext.GetDeviceContext(*getter_AddRefs(deviceContext));
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nsCOMPtr<nsIFontMetrics> normalFont;
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deviceContext->GetMetricsFor(font->mFont, *getter_AddRefs(fm));
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}
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if (decorations & NS_STYLE_TEXT_DECORATION_UNDERLINE) {
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PaintTextDecorations(aRenderingContext, fm,
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NS_STYLE_TEXT_DECORATION_UNDERLINE, underColor);
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}
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if (decorations & NS_STYLE_TEXT_DECORATION_OVERLINE) {
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PaintTextDecorations(aRenderingContext, fm,
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NS_STYLE_TEXT_DECORATION_OVERLINE, overColor);
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}
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}
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PaintChildren(aPresContext, aRenderingContext, aDirtyRect,
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aWhichLayer, aFlags);
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if (decorations & NS_STYLE_TEXT_DECORATION_LINE_THROUGH) {
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PaintTextDecorations(aRenderingContext, fm,
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NS_STYLE_TEXT_DECORATION_LINE_THROUGH, strikeColor);
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}
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}
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static PRBool
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HasTextFrameDescendantOrInFlow(nsPresContext* aPresContext, nsIFrame* aFrame);
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void
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nsHTMLContainerFrame::GetTextDecorations(nsPresContext* aPresContext,
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PRBool aIsBlock,
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PRUint8& aDecorations,
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nscolor& aUnderColor,
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nscolor& aOverColor,
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nscolor& aStrikeColor)
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{
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aDecorations = NS_STYLE_TEXT_DECORATION_NONE;
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if (!mStyleContext->HasTextDecorations()) {
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// This is a necessary, but not sufficient, condition for text
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// decorations.
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return;
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}
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// A mask of all possible decorations.
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PRUint8 decorMask = NS_STYLE_TEXT_DECORATION_UNDERLINE |
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NS_STYLE_TEXT_DECORATION_OVERLINE |
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NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
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if (!aIsBlock) {
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aDecorations = GetStyleTextReset()->mTextDecoration & decorMask;
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if (aDecorations) {
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const nsStyleColor* styleColor = GetStyleColor();
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aUnderColor = styleColor->mColor;
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aOverColor = styleColor->mColor;
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aStrikeColor = styleColor->mColor;
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}
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}
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else {
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// walk tree
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for (nsIFrame *frame = this; frame && decorMask; frame = frame->GetParent()) {
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// find text-decorations. "Inherit" from parent *block* frames
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nsStyleContext* styleContext = frame->GetStyleContext();
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const nsStyleDisplay* styleDisplay = styleContext->GetStyleDisplay();
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if (!styleDisplay->IsBlockLevel() &&
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styleDisplay->mDisplay != NS_STYLE_DISPLAY_TABLE_CELL) {
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// If an inline frame is discovered while walking up the tree,
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// we should stop according to CSS3 draft. CSS2 is rather vague
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// about this.
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break;
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}
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const nsStyleTextReset* styleText = styleContext->GetStyleTextReset();
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PRUint8 decors = decorMask & styleText->mTextDecoration;
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if (decors) {
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// A *new* text-decoration is found.
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nscolor color = styleContext->GetStyleColor()->mColor;
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if (NS_STYLE_TEXT_DECORATION_UNDERLINE & decors) {
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aUnderColor = color;
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decorMask &= ~NS_STYLE_TEXT_DECORATION_UNDERLINE;
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aDecorations |= NS_STYLE_TEXT_DECORATION_UNDERLINE;
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}
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if (NS_STYLE_TEXT_DECORATION_OVERLINE & decors) {
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aOverColor = color;
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decorMask &= ~NS_STYLE_TEXT_DECORATION_OVERLINE;
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aDecorations |= NS_STYLE_TEXT_DECORATION_OVERLINE;
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}
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if (NS_STYLE_TEXT_DECORATION_LINE_THROUGH & decors) {
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aStrikeColor = color;
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decorMask &= ~NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
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aDecorations |= NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
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}
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}
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}
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}
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if (aDecorations) {
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// If this frame contains no text, we're required to ignore this property
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if (!HasTextFrameDescendantOrInFlow(aPresContext, this)) {
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aDecorations = NS_STYLE_TEXT_DECORATION_NONE;
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}
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}
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}
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static PRBool
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HasTextFrameDescendant(nsPresContext* aPresContext, nsIFrame* aParent)
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{
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for (nsIFrame* kid = aParent->GetFirstChild(nsnull); kid;
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kid = kid->GetNextSibling())
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{
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if (kid->GetType() == nsLayoutAtoms::textFrame) {
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// This is only a candidate. We need to determine if this text
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// frame is empty, as in containing only (non-pre) whitespace.
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// See bug 20163.
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if (!kid->IsEmpty()) {
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return PR_TRUE;
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}
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}
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if (HasTextFrameDescendant(aPresContext, kid)) {
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return PR_TRUE;
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}
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}
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return PR_FALSE;
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}
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static PRBool
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HasTextFrameDescendantOrInFlow(nsPresContext* aPresContext, nsIFrame* aFrame)
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{
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for (nsIFrame *f = aFrame->GetFirstInFlow(); f; f = f->GetNextInFlow()) {
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if (HasTextFrameDescendant(aPresContext, f))
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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#if (NS_SIDE_TOP == 0) && (NS_SIDE_RIGHT == 1) && (NS_SIDE_BOTTOM == 2) && (NS_SIDE_LEFT == 3)
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static nscoord nsMargin::* const nsMarginSides[4] = {
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&nsMargin::top,
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&nsMargin::right,
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&nsMargin::bottom,
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&nsMargin::left,
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};
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#else
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#error "Somebody changed the side constants."
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#endif
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/*virtual*/ void
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nsHTMLContainerFrame::PaintTextDecorationLines(
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nsIRenderingContext& aRenderingContext,
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nscolor aColor,
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nscoord aOffset,
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nscoord aAscent,
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nscoord aSize)
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{
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nsMargin bp;
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CalcBorderPadding(bp);
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PRIntn skip = GetSkipSides();
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NS_FOR_CSS_SIDES(side) {
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if (skip & (1 << side)) {
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bp.*(nsMarginSides[side]) = 0;
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}
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}
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aRenderingContext.SetColor(aColor);
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nscoord innerWidth = mRect.width - bp.left - bp.right;
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aRenderingContext.FillRect(bp.left,
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bp.top + aAscent - aOffset, innerWidth, aSize);
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}
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void
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nsHTMLContainerFrame::PaintTextDecorations(
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nsIRenderingContext& aRenderingContext,
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nsIFontMetrics* aFontMetrics,
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PRUint8 aDecoration,
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nscolor aColor)
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{
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nscoord ascent, offset, size;
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aFontMetrics->GetMaxAscent(ascent);
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if (aDecoration &
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(NS_STYLE_TEXT_DECORATION_UNDERLINE
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| NS_STYLE_TEXT_DECORATION_OVERLINE)) {
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aFontMetrics->GetUnderline(offset, size);
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if (NS_STYLE_TEXT_DECORATION_UNDERLINE & aDecoration) {
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PaintTextDecorationLines(aRenderingContext, aColor, offset, ascent, size);
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}
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else if (NS_STYLE_TEXT_DECORATION_OVERLINE & aDecoration) {
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PaintTextDecorationLines(aRenderingContext, aColor, ascent, ascent, size);
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}
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}
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else if (NS_STYLE_TEXT_DECORATION_LINE_THROUGH & aDecoration) {
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aFontMetrics->GetStrikeout(offset, size);
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PaintTextDecorationLines(aRenderingContext, aColor, offset, ascent, size);
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}
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}
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/**
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* Create a next-in-flow for aFrame. Will return the newly created
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* frame in aNextInFlowResult <b>if and only if</b> a new frame is
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* created; otherwise nsnull is returned in aNextInFlowResult.
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*/
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nsresult
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nsHTMLContainerFrame::CreateNextInFlow(nsPresContext* aPresContext,
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nsIFrame* aOuterFrame,
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nsIFrame* aFrame,
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nsIFrame*& aNextInFlowResult)
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{
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aNextInFlowResult = nsnull;
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nsIFrame* nextInFlow = aFrame->GetNextInFlow();
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if (nsnull == nextInFlow) {
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// Create a continuation frame for the child frame and insert it
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// into our lines child list.
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nsIFrame* nextFrame = aFrame->GetNextSibling();
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aPresContext->PresShell()->FrameConstructor()->
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CreateContinuingFrame(aPresContext, aFrame, aOuterFrame, &nextInFlow);
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if (nsnull == nextInFlow) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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aFrame->SetNextSibling(nextInFlow);
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nextInFlow->SetNextSibling(nextFrame);
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NS_FRAME_LOG(NS_FRAME_TRACE_NEW_FRAMES,
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("nsHTMLContainerFrame::MaybeCreateNextInFlow: frame=%p nextInFlow=%p",
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aFrame, nextInFlow));
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aNextInFlowResult = nextInFlow;
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}
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return NS_OK;
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}
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static nsresult
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ReparentFrameViewTo(nsIFrame* aFrame,
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nsIViewManager* aViewManager,
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nsIView* aNewParentView,
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nsIView* aOldParentView)
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{
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// XXX What to do about placeholder views for "position: fixed" elements?
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// They should be reparented too.
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// Does aFrame have a view?
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if (aFrame->HasView()) {
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nsIView* view = aFrame->GetView();
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// Verify that the current parent view is what we think it is
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//nsIView* parentView;
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//NS_ASSERTION(parentView == aOldParentView, "unexpected parent view");
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aViewManager->RemoveChild(view);
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// The view will remember the Z-order and other attributes that have been set on it.
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nsIView* insertBefore = nsLayoutUtils::FindSiblingViewFor(aNewParentView, aFrame);
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aViewManager->InsertChild(aNewParentView, view, insertBefore, insertBefore != nsnull);
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} else {
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PRInt32 listIndex = 0;
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nsIAtom* listName = nsnull;
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// This loop iterates through every child list name, and also
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// executes once with listName == nsnull.
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do {
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// Iterate the child frames, and check each child frame to see if it has
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// a view
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nsIFrame* childFrame = aFrame->GetFirstChild(listName);
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for (; childFrame; childFrame = childFrame->GetNextSibling()) {
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ReparentFrameViewTo(childFrame, aViewManager,
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aNewParentView, aOldParentView);
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}
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listName = aFrame->GetAdditionalChildListName(listIndex++);
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} while (listName);
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}
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return NS_OK;
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}
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nsresult
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nsHTMLContainerFrame::ReparentFrameView(nsPresContext* aPresContext,
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nsIFrame* aChildFrame,
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nsIFrame* aOldParentFrame,
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nsIFrame* aNewParentFrame)
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{
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NS_PRECONDITION(aChildFrame, "null child frame pointer");
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NS_PRECONDITION(aOldParentFrame, "null old parent frame pointer");
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NS_PRECONDITION(aNewParentFrame, "null new parent frame pointer");
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NS_PRECONDITION(aOldParentFrame != aNewParentFrame, "same old and new parent frame");
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// This code is called often and we need it to be as fast as possible, so
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// see if we can trivially detect that no work needs to be done
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if (!aChildFrame->HasView()) {
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// Child frame doesn't have a view. See if it has any child frames
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if (!aChildFrame->GetFirstChild(nsnull)) {
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return NS_OK;
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}
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}
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// See if either the old parent frame or the new parent frame have a view
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while (!aOldParentFrame->HasView() && !aNewParentFrame->HasView()) {
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// Walk up both the old parent frame and the new parent frame nodes
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// stopping when we either find a common parent or views for one
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// or both of the frames.
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//
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// This works well in the common case where we push/pull and the old parent
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// frame and the new parent frame are part of the same flow. They will
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// typically be the same distance (height wise) from the
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aOldParentFrame = aOldParentFrame->GetParent();
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aNewParentFrame = aNewParentFrame->GetParent();
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// We should never walk all the way to the root frame without finding
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// a view
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NS_ASSERTION(aOldParentFrame && aNewParentFrame, "didn't find view");
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// See if we reached a common ancestor
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if (aOldParentFrame == aNewParentFrame) {
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break;
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}
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}
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// See if we found a common parent frame
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if (aOldParentFrame == aNewParentFrame) {
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// We found a common parent and there are no views between the old parent
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// and the common parent or the new parent frame and the common parent.
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// Because neither the old parent frame nor the new parent frame have views,
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// then any child views don't need reparenting
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return NS_OK;
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}
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// We found views for one or both of the ancestor frames before we
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// found a common ancestor.
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nsIView* oldParentView = aOldParentFrame->GetClosestView();
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nsIView* newParentView = aNewParentFrame->GetClosestView();
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// See if the old parent frame and the new parent frame are in the
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// same view sub-hierarchy. If they are then we don't have to do
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// anything
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if (oldParentView != newParentView) {
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// They're not so we need to reparent any child views
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return ReparentFrameViewTo(aChildFrame, oldParentView->GetViewManager(), newParentView,
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oldParentView);
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}
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return NS_OK;
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}
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nsresult
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nsHTMLContainerFrame::ReparentFrameViewList(nsPresContext* aPresContext,
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nsIFrame* aChildFrameList,
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nsIFrame* aOldParentFrame,
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nsIFrame* aNewParentFrame)
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{
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NS_PRECONDITION(aChildFrameList, "null child frame list");
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NS_PRECONDITION(aOldParentFrame, "null old parent frame pointer");
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NS_PRECONDITION(aNewParentFrame, "null new parent frame pointer");
|
|
NS_PRECONDITION(aOldParentFrame != aNewParentFrame, "same old and new parent frame");
|
|
|
|
// See if either the old parent frame or the new parent frame have a view
|
|
while (!aOldParentFrame->HasView() && !aNewParentFrame->HasView()) {
|
|
// Walk up both the old parent frame and the new parent frame nodes
|
|
// stopping when we either find a common parent or views for one
|
|
// or both of the frames.
|
|
//
|
|
// This works well in the common case where we push/pull and the old parent
|
|
// frame and the new parent frame are part of the same flow. They will
|
|
// typically be the same distance (height wise) from the
|
|
aOldParentFrame = aOldParentFrame->GetParent();
|
|
aNewParentFrame = aNewParentFrame->GetParent();
|
|
|
|
// We should never walk all the way to the root frame without finding
|
|
// a view
|
|
NS_ASSERTION(aOldParentFrame && aNewParentFrame, "didn't find view");
|
|
|
|
// See if we reached a common ancestor
|
|
if (aOldParentFrame == aNewParentFrame) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
// See if we found a common parent frame
|
|
if (aOldParentFrame == aNewParentFrame) {
|
|
// We found a common parent and there are no views between the old parent
|
|
// and the common parent or the new parent frame and the common parent.
|
|
// Because neither the old parent frame nor the new parent frame have views,
|
|
// then any child views don't need reparenting
|
|
return NS_OK;
|
|
}
|
|
|
|
// We found views for one or both of the ancestor frames before we
|
|
// found a common ancestor.
|
|
nsIView* oldParentView = aOldParentFrame->GetClosestView();
|
|
nsIView* newParentView = aNewParentFrame->GetClosestView();
|
|
|
|
// See if the old parent frame and the new parent frame are in the
|
|
// same view sub-hierarchy. If they are then we don't have to do
|
|
// anything
|
|
if (oldParentView != newParentView) {
|
|
nsIViewManager* viewManager = oldParentView->GetViewManager();
|
|
|
|
// They're not so we need to reparent any child views
|
|
for (nsIFrame* f = aChildFrameList; f; f = f->GetNextSibling()) {
|
|
ReparentFrameViewTo(f, viewManager, newParentView,
|
|
oldParentView);
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsHTMLContainerFrame::CreateViewForFrame(nsIFrame* aFrame,
|
|
nsIFrame* aContentParentFrame,
|
|
PRBool aForce)
|
|
{
|
|
if (aFrame->HasView()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// If we don't yet have a view, see if we need a view
|
|
if (!(aForce || FrameNeedsView(aFrame))) {
|
|
// don't need a view
|
|
return NS_OK;
|
|
}
|
|
|
|
// Create a view
|
|
nsIFrame* parent = aFrame->GetAncestorWithView();
|
|
NS_ASSERTION(parent, "GetParentWithView failed");
|
|
|
|
nsIView* parentView = parent->GetView();
|
|
NS_ASSERTION(parentView, "no parent with view");
|
|
|
|
nsIViewManager* viewManager = parentView->GetViewManager();
|
|
NS_ASSERTION(viewManager, "null view manager");
|
|
|
|
// Create a view
|
|
nsIView* view = viewManager->CreateView(aFrame->GetRect(), parentView);
|
|
if (!view)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
SyncFrameViewProperties(aFrame->GetPresContext(), aFrame, nsnull, view);
|
|
|
|
// Insert the view into the view hierarchy. If the parent view is a
|
|
// scrolling view we need to do this differently
|
|
nsIScrollableView* scrollingView = parentView->ToScrollableView();
|
|
if (scrollingView) {
|
|
scrollingView->SetScrolledView(view);
|
|
} else {
|
|
nsIView* insertBefore = nsLayoutUtils::FindSiblingViewFor(parentView, aFrame);
|
|
// we insert this view 'above' the insertBefore view, unless insertBefore is null,
|
|
// in which case we want to call with aAbove == PR_FALSE to insert at the beginning
|
|
// in document order
|
|
viewManager->InsertChild(parentView, view, insertBefore, insertBefore != nsnull);
|
|
|
|
if (nsnull != aContentParentFrame) {
|
|
nsIView* zParentView = aContentParentFrame->GetClosestView();
|
|
if (zParentView != parentView) {
|
|
insertBefore = nsLayoutUtils::FindSiblingViewFor(zParentView, aFrame);
|
|
viewManager->InsertZPlaceholder(zParentView, view, insertBefore, insertBefore != nsnull);
|
|
}
|
|
}
|
|
}
|
|
|
|
// XXX If it's fixed positioned, then create a widget so it floats
|
|
// above the scrolling area
|
|
const nsStyleDisplay* display = aFrame->GetStyleContext()->GetStyleDisplay();
|
|
if (NS_STYLE_POSITION_FIXED == display->mPosition) {
|
|
aFrame->CreateWidgetForView(view);
|
|
}
|
|
|
|
// Reparent views on any child frames (or their descendants) to this
|
|
// view. We can just call ReparentFrameViewTo on this frame because
|
|
// we know this frame has no view, so it will crawl the children. Also,
|
|
// we know that any descendants with views must have 'parentView' as their
|
|
// parent view.
|
|
ReparentFrameViewTo(aFrame, viewManager, view, parentView);
|
|
|
|
// Remember our view
|
|
aFrame->SetView(view);
|
|
|
|
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
|
|
("nsHTMLContainerFrame::CreateViewForFrame: frame=%p view=%p",
|
|
aFrame));
|
|
return NS_OK;
|
|
}
|