mirror of
https://github.com/mozilla/gecko-dev.git
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1101 lines
30 KiB
C++
1101 lines
30 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsString.h"
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#include "nsUnitConversion.h"
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#include "nsIPresContext.h"
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#include "nsIStyleRule.h"
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#include "nsISupportsArray.h"
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#include "nsCRT.h"
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#include "nsIFrame.h"
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//#define DEBUG_REFS
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static NS_DEFINE_IID(kIStyleContextIID, NS_ISTYLECONTEXT_IID);
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// --------------------
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// nsStyleFont
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//
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nsStyleFont::nsStyleFont(const nsFont& aVariableFont, const nsFont& aFixedFont)
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: mFont(aVariableFont),
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mFixedFont(aFixedFont)
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{ }
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nsStyleFont::~nsStyleFont(void) { }
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struct StyleFontImpl : public nsStyleFont {
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StyleFontImpl(const nsFont& aVariableFont, const nsFont& aFixedFont)
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: nsStyleFont(aVariableFont, aFixedFont)
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{}
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void ResetFrom(const nsStyleFont* aParent, nsIPresContext* aPresContext);
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private: // These are not allowed
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StyleFontImpl(const StyleFontImpl& aOther);
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StyleFontImpl& operator=(const StyleFontImpl& aOther);
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};
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void StyleFontImpl::ResetFrom(const nsStyleFont* aParent, nsIPresContext* aPresContext)
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{
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if (nsnull != aParent) {
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mFont = aParent->mFont;
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mFixedFont = aParent->mFixedFont;
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mFlags = aParent->mFlags;
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}
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else {
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mFont = aPresContext->GetDefaultFont();
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mFixedFont = aPresContext->GetDefaultFixedFont();
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mFlags = NS_STYLE_FONT_DEFAULT;
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}
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}
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// --------------------
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// nsStyleColor
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//
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nsStyleColor::nsStyleColor(void) { }
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nsStyleColor::~nsStyleColor(void) { }
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struct StyleColorImpl: public nsStyleColor {
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StyleColorImpl(void) { }
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void ResetFrom(const nsStyleColor* aParent, nsIPresContext* aPresContext);
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private: // These are not allowed
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StyleColorImpl(const StyleColorImpl& aOther);
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StyleColorImpl& operator=(const StyleColorImpl& aOther);
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};
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void StyleColorImpl::ResetFrom(const nsStyleColor* aParent, nsIPresContext* aPresContext)
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{
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if (nsnull != aParent) {
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mColor = aParent->mColor;
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mOpacity = aParent->mOpacity;
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}
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else {
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if (nsnull != aPresContext) {
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aPresContext->GetDefaultColor(mColor);
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}
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else {
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mColor = NS_RGB(0x00, 0x00, 0x00);
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}
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mOpacity = 1.0F;
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}
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mBackgroundAttachment = NS_STYLE_BG_ATTACHMENT_SCROLL;
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mBackgroundFlags = NS_STYLE_BG_COLOR_TRANSPARENT;
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mBackgroundRepeat = NS_STYLE_BG_REPEAT_XY;
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if (nsnull != aPresContext) {
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aPresContext->GetDefaultBackgroundColor(mBackgroundColor);
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}
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else {
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mBackgroundColor = NS_RGB(192,192,192);
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}
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mBackgroundXPosition = 0;
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mBackgroundYPosition = 0;
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mCursor = NS_STYLE_CURSOR_INHERIT;
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}
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// --------------------
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// nsStyleSpacing
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//
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nsStyleSpacing::nsStyleSpacing(void) { }
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#define NS_SPACING_MARGIN 0
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#define NS_SPACING_PADDING 1
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#define NS_SPACING_BORDER 2
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static nscoord CalcSideFor(const nsIFrame* aFrame, const nsStyleCoord& aCoord,
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PRUint8 aSpacing, PRUint8 aSide,
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const nscoord* aEnumTable, PRInt32 aNumEnums)
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{
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nscoord result = 0;
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switch (aCoord.GetUnit()) {
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case eStyleUnit_Auto:
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aFrame->GetAutoMarginSize(aSide, result);
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break;
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case eStyleUnit_Inherit:
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nsIFrame* parentFrame;
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aFrame->GetGeometricParent(parentFrame); // XXX may not be direct parent...
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if (nsnull != parentFrame) {
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nsIStyleContext* parentContext;
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parentFrame->GetStyleContext(nsnull, parentContext);
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if (nsnull != parentContext) {
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const nsStyleSpacing* parentSpacing = (const nsStyleSpacing*)parentContext->GetStyleData(eStyleStruct_Spacing);
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nsMargin parentMargin;
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switch (aSpacing) {
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case NS_SPACING_MARGIN: parentSpacing->CalcMarginFor(parentFrame, parentMargin);
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break;
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case NS_SPACING_PADDING: parentSpacing->CalcPaddingFor(parentFrame, parentMargin);
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break;
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case NS_SPACING_BORDER: parentSpacing->CalcBorderFor(parentFrame, parentMargin);
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break;
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}
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switch (aSide) {
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case NS_SIDE_LEFT: result = parentMargin.left; break;
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case NS_SIDE_TOP: result = parentMargin.top; break;
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case NS_SIDE_RIGHT: result = parentMargin.right; break;
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case NS_SIDE_BOTTOM: result = parentMargin.bottom; break;
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}
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NS_RELEASE(parentContext);
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}
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}
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case eStyleUnit_Percent:
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{
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nscoord baseWidth = 0;
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PRBool isBase = PR_FALSE;
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nsIFrame* frame;
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aFrame->GetGeometricParent(frame);
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while (nsnull != frame) {
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frame->IsPercentageBase(isBase);
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if (isBase) {
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nsSize size;
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frame->GetSize(size);
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baseWidth = size.width; // not really width, need to subtract out padding...
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break;
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}
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frame->GetGeometricParent(frame);
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}
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result = (nscoord)((float)baseWidth * aCoord.GetPercentValue());
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}
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break;
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case eStyleUnit_Coord:
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result = aCoord.GetCoordValue();
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break;
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case eStyleUnit_Enumerated:
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if (nsnull != aEnumTable) {
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PRInt32 value = aCoord.GetIntValue();
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if ((0 <= value) && (value < aNumEnums)) {
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return aEnumTable[aCoord.GetIntValue()];
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}
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}
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break;
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case eStyleUnit_Null:
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case eStyleUnit_Normal:
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case eStyleUnit_Integer:
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case eStyleUnit_Proportional:
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default:
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result = 0;
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break;
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}
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if ((NS_SPACING_PADDING == aSpacing) || (NS_SPACING_BORDER == aSpacing)) {
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if (result < 0) {
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result = 0;
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}
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}
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return result;
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}
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static void CalcSidesFor(const nsIFrame* aFrame, const nsStyleSides& aSides,
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PRUint8 aSpacing,
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const nscoord* aEnumTable, PRInt32 aNumEnums,
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nsMargin& aResult)
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{
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nsStyleCoord coord;
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aResult.left = CalcSideFor(aFrame, aSides.GetLeft(coord), aSpacing, NS_SIDE_LEFT,
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aEnumTable, aNumEnums);
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aResult.top = CalcSideFor(aFrame, aSides.GetTop(coord), aSpacing, NS_SIDE_TOP,
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aEnumTable, aNumEnums);
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aResult.right = CalcSideFor(aFrame, aSides.GetRight(coord), aSpacing, NS_SIDE_RIGHT,
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aEnumTable, aNumEnums);
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aResult.bottom = CalcSideFor(aFrame, aSides.GetBottom(coord), aSpacing, NS_SIDE_BOTTOM,
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aEnumTable, aNumEnums);
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}
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void nsStyleSpacing::CalcMarginFor(const nsIFrame* aFrame, nsMargin& aMargin) const
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{
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if (mHasCachedMargin) {
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aMargin = mCachedMargin;
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}
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else {
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CalcSidesFor(aFrame, mMargin, NS_SPACING_MARGIN, nsnull, 0, aMargin);
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}
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}
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void nsStyleSpacing::CalcPaddingFor(const nsIFrame* aFrame, nsMargin& aPadding) const
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{
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if (mHasCachedPadding) {
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aPadding = mCachedPadding;
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}
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else {
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CalcSidesFor(aFrame, mPadding, NS_SPACING_PADDING, nsnull, 0, aPadding);
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}
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}
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static const nscoord kBorderWidths[3] =
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{ NSIntPointsToTwips(1),
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NSIntPointsToTwips(3),
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NSIntPointsToTwips(5) };
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void nsStyleSpacing::CalcBorderFor(const nsIFrame* aFrame, nsMargin& aBorder) const
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{
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if (mHasCachedBorder) {
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aBorder = mCachedBorder;
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}
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else {
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CalcSidesFor(aFrame, mBorder, NS_SPACING_BORDER, kBorderWidths, 3, aBorder);
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}
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}
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void nsStyleSpacing::CalcBorderPaddingFor(const nsIFrame* aFrame, nsMargin& aBorderPadding) const
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{
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if (mHasCachedPadding && mHasCachedBorder) {
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aBorderPadding = mCachedBorderPadding;
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}
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else {
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nsMargin border;
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CalcBorderFor(aFrame, border);
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CalcPaddingFor(aFrame, aBorderPadding);
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aBorderPadding += border;
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}
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}
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struct StyleSpacingImpl: public nsStyleSpacing {
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StyleSpacingImpl(void)
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: nsStyleSpacing()
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{}
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void ResetFrom(const nsStyleSpacing* aParent, nsIPresContext* aPresContext);
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void RecalcData(nsIPresContext* aPresContext);
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};
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void StyleSpacingImpl::ResetFrom(const nsStyleSpacing* aParent, nsIPresContext* aPresContext)
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{
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// spacing values not inherited
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mMargin.Reset();
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mPadding.Reset();
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mBorder.Reset();
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mBorderStyle[0] = NS_STYLE_BORDER_STYLE_NONE;
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mBorderStyle[1] = NS_STYLE_BORDER_STYLE_NONE;
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mBorderStyle[2] = NS_STYLE_BORDER_STYLE_NONE;
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mBorderStyle[3] = NS_STYLE_BORDER_STYLE_NONE;
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mBorderColor[0] = NS_RGB(0, 0, 0);
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mBorderColor[1] = NS_RGB(0, 0, 0);
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mBorderColor[2] = NS_RGB(0, 0, 0);
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mBorderColor[3] = NS_RGB(0, 0, 0);
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mHasCachedMargin = PR_FALSE;
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mHasCachedPadding = PR_FALSE;
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mHasCachedBorder = PR_FALSE;
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}
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inline PRBool IsFixedUnit(nsStyleUnit aUnit, PRBool aEnumOK)
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{
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return PRBool((aUnit == eStyleUnit_Null) ||
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(aUnit == eStyleUnit_Coord) ||
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(aEnumOK && (aUnit == eStyleUnit_Enumerated)));
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}
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static PRBool IsFixedData(const nsStyleSides& aSides, PRBool aEnumOK)
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{
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return PRBool(IsFixedUnit(aSides.GetLeftUnit(), aEnumOK) &&
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IsFixedUnit(aSides.GetTopUnit(), aEnumOK) &&
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IsFixedUnit(aSides.GetRightUnit(), aEnumOK) &&
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IsFixedUnit(aSides.GetBottomUnit(), aEnumOK));
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}
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static nscoord CalcCoord(const nsStyleCoord& aCoord,
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const nscoord* aEnumTable,
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PRInt32 aNumEnums)
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{
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switch (aCoord.GetUnit()) {
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case eStyleUnit_Null:
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return 0;
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case eStyleUnit_Coord:
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return aCoord.GetCoordValue();
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case eStyleUnit_Enumerated:
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if (nsnull != aEnumTable) {
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PRInt32 value = aCoord.GetIntValue();
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if ((0 <= value) && (value < aNumEnums)) {
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return aEnumTable[aCoord.GetIntValue()];
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}
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}
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break;
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default:
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NS_ERROR("bad unit type");
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break;
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}
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return 0;
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}
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void StyleSpacingImpl::RecalcData(nsIPresContext* aPresContext)
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{
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if (IsFixedData(mMargin, PR_FALSE)) {
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nsStyleCoord coord;
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mCachedMargin.left = CalcCoord(mMargin.GetLeft(coord), nsnull, 0);
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mCachedMargin.top = CalcCoord(mMargin.GetTop(coord), nsnull, 0);
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mCachedMargin.right = CalcCoord(mMargin.GetRight(coord), nsnull, 0);
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mCachedMargin.bottom = CalcCoord(mMargin.GetBottom(coord), nsnull, 0);
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mHasCachedMargin = PR_TRUE;
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}
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else {
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mHasCachedMargin = PR_FALSE;
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}
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if (IsFixedData(mPadding, PR_FALSE)) {
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nsStyleCoord coord;
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mCachedPadding.left = CalcCoord(mPadding.GetLeft(coord), nsnull, 0);
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mCachedPadding.top = CalcCoord(mPadding.GetTop(coord), nsnull, 0);
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mCachedPadding.right = CalcCoord(mPadding.GetRight(coord), nsnull, 0);
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mCachedPadding.bottom = CalcCoord(mPadding.GetBottom(coord), nsnull, 0);
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mHasCachedPadding = PR_TRUE;
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}
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else {
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mHasCachedPadding = PR_FALSE;
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}
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if (((NS_STYLE_BORDER_STYLE_NONE == mBorderStyle[NS_SIDE_LEFT]) || IsFixedUnit(mBorder.GetLeftUnit(), PR_TRUE)) &&
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((NS_STYLE_BORDER_STYLE_NONE == mBorderStyle[NS_SIDE_TOP]) || IsFixedUnit(mBorder.GetTopUnit(), PR_TRUE)) &&
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((NS_STYLE_BORDER_STYLE_NONE == mBorderStyle[NS_SIDE_RIGHT]) || IsFixedUnit(mBorder.GetRightUnit(), PR_TRUE)) &&
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((NS_STYLE_BORDER_STYLE_NONE == mBorderStyle[NS_SIDE_BOTTOM]) || IsFixedUnit(mBorder.GetBottomUnit(), PR_TRUE))) {
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nsStyleCoord coord;
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if (NS_STYLE_BORDER_STYLE_NONE == mBorderStyle[NS_SIDE_LEFT]) {
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mCachedBorder.left = 0;
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}
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else {
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mCachedBorder.left = CalcCoord(mBorder.GetLeft(coord), kBorderWidths, 3);
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}
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if (NS_STYLE_BORDER_STYLE_NONE == mBorderStyle[NS_SIDE_TOP]) {
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mCachedBorder.top = 0;
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}
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else {
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mCachedBorder.top = CalcCoord(mBorder.GetTop(coord), kBorderWidths, 3);
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}
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if (NS_STYLE_BORDER_STYLE_NONE == mBorderStyle[NS_SIDE_RIGHT]) {
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mCachedBorder.right = 0;
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}
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else {
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mCachedBorder.right = CalcCoord(mBorder.GetRight(coord), kBorderWidths, 3);
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}
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if (NS_STYLE_BORDER_STYLE_NONE == mBorderStyle[NS_SIDE_BOTTOM]) {
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mCachedBorder.bottom = 0;
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}
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else {
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mCachedBorder.bottom = CalcCoord(mBorder.GetBottom(coord), kBorderWidths, 3);
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}
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mHasCachedBorder = PR_TRUE;
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}
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else {
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mHasCachedBorder = PR_FALSE;
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}
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if (mHasCachedBorder && mHasCachedPadding) {
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mCachedBorderPadding = mCachedPadding;
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mCachedBorderPadding += mCachedBorder;
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}
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// XXX fixup missing border colors
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}
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// --------------------
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// nsStyleList
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//
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nsStyleList::nsStyleList(void) { }
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nsStyleList::~nsStyleList(void) { }
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struct StyleListImpl: public nsStyleList {
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StyleListImpl(void) { }
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void ResetFrom(const nsStyleList* aParent, nsIPresContext* aPresContext);
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};
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void StyleListImpl::ResetFrom(const nsStyleList* aParent, nsIPresContext* aPresContext)
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{
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if (nsnull != aParent) {
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mListStyleType = aParent->mListStyleType;
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mListStyleImage = aParent->mListStyleImage;
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mListStylePosition = aParent->mListStylePosition;
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}
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else {
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mListStyleType = NS_STYLE_LIST_STYLE_BASIC;
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mListStylePosition = NS_STYLE_LIST_STYLE_POSITION_OUTSIDE;
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mListStyleImage.Truncate();
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}
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}
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// --------------------
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// nsStylePosition
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//
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nsStylePosition::nsStylePosition(void) { }
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struct StylePositionImpl: public nsStylePosition {
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StylePositionImpl(void) { }
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void ResetFrom(const nsStylePosition* aParent, nsIPresContext* aPresContext);
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private: // These are not allowed
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StylePositionImpl(const StylePositionImpl& aOther);
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StylePositionImpl& operator=(const StylePositionImpl& aOther);
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};
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void StylePositionImpl::ResetFrom(const nsStylePosition* aParent, nsIPresContext* aPresContext)
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{
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// positioning values not inherited
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mPosition = NS_STYLE_POSITION_NORMAL;
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mLeftOffset.SetAutoValue();
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mTopOffset.SetAutoValue();
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mWidth.SetAutoValue();
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mHeight.SetAutoValue();
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mZIndex.SetAutoValue();
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}
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// --------------------
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// nsStyleText
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//
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nsStyleText::nsStyleText(void) { }
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struct StyleTextImpl: public nsStyleText {
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StyleTextImpl(void) { }
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void ResetFrom(const nsStyleText* aParent, nsIPresContext* aPresContext);
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};
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void StyleTextImpl::ResetFrom(const nsStyleText* aParent, nsIPresContext* aPresContext)
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{
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// These properties not inherited
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mTextDecoration = NS_STYLE_TEXT_DECORATION_NONE;
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mVerticalAlign.SetIntValue(NS_STYLE_VERTICAL_ALIGN_BASELINE, eStyleUnit_Enumerated);
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if (nsnull != aParent) {
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mTextAlign = aParent->mTextAlign;
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mTextTransform = aParent->mTextTransform;
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mWhiteSpace = aParent->mWhiteSpace;
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mLetterSpacing = aParent->mLetterSpacing;
|
|
mLineHeight = aParent->mLineHeight;
|
|
mTextIndent = aParent->mTextIndent;
|
|
mWordSpacing = aParent->mWordSpacing;
|
|
}
|
|
else {
|
|
mTextAlign = NS_STYLE_TEXT_ALIGN_DEFAULT;
|
|
mTextTransform = NS_STYLE_TEXT_TRANSFORM_NONE;
|
|
mWhiteSpace = NS_STYLE_WHITESPACE_NORMAL;
|
|
|
|
mLetterSpacing.SetNormalValue();
|
|
mLineHeight.SetNormalValue();
|
|
mTextIndent.SetCoordValue(0);
|
|
mWordSpacing.SetNormalValue();
|
|
}
|
|
|
|
}
|
|
|
|
// --------------------
|
|
// nsStyleDisplay
|
|
//
|
|
|
|
nsStyleDisplay::nsStyleDisplay(void) { }
|
|
|
|
struct StyleDisplayImpl: public nsStyleDisplay {
|
|
StyleDisplayImpl(void) { }
|
|
|
|
void ResetFrom(const nsStyleDisplay* aParent, nsIPresContext* aPresContext);
|
|
};
|
|
|
|
void StyleDisplayImpl::ResetFrom(const nsStyleDisplay* aParent, nsIPresContext* aPresContext)
|
|
{
|
|
if (nsnull != aParent) {
|
|
mDirection = aParent->mDirection;
|
|
mVisible = aParent->mVisible;
|
|
}
|
|
else {
|
|
mDirection = NS_STYLE_DIRECTION_LTR;
|
|
mVisible = PR_TRUE;
|
|
}
|
|
mDisplay = NS_STYLE_DISPLAY_INLINE;
|
|
mFloats = NS_STYLE_FLOAT_NONE;
|
|
mBreakType = NS_STYLE_CLEAR_NONE;
|
|
mBreakBefore = PR_FALSE;
|
|
mBreakAfter = PR_FALSE;
|
|
mOverflow = NS_STYLE_OVERFLOW_VISIBLE;
|
|
mClipFlags = NS_STYLE_CLIP_AUTO;
|
|
mClip.SizeTo(0,0,0,0);
|
|
}
|
|
|
|
// --------------------
|
|
// nsStyleTable
|
|
//
|
|
|
|
nsStyleTable::nsStyleTable(void) { }
|
|
|
|
struct StyleTableImpl: public nsStyleTable {
|
|
StyleTableImpl(void);
|
|
|
|
void ResetFrom(const nsStyleTable* aParent, nsIPresContext* aPresContext);
|
|
};
|
|
|
|
StyleTableImpl::StyleTableImpl()
|
|
{
|
|
ResetFrom(nsnull, nsnull);
|
|
}
|
|
|
|
void StyleTableImpl::ResetFrom(const nsStyleTable* aParent, nsIPresContext* aPresContext)
|
|
{
|
|
// values not inherited
|
|
mLayoutStrategy = NS_STYLE_TABLE_LAYOUT_AUTO;
|
|
mCols = NS_STYLE_TABLE_COLS_NONE;
|
|
mFrame = NS_STYLE_TABLE_FRAME_NONE;
|
|
mRules = NS_STYLE_TABLE_RULES_NONE;
|
|
mCellPadding.Reset();
|
|
mCellSpacing.Reset();
|
|
mSpan=1;
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
class StyleContextImpl : public nsIStyleContext {
|
|
public:
|
|
StyleContextImpl(nsIStyleContext* aParent, nsISupportsArray* aRules,
|
|
nsIPresContext* aPresContext);
|
|
~StyleContextImpl();
|
|
|
|
void* operator new(size_t sz) {
|
|
void* rv = new char[sz];
|
|
nsCRT::zero(rv, sz);
|
|
return rv;
|
|
}
|
|
|
|
NS_DECL_ISUPPORTS
|
|
|
|
virtual nsIStyleContext* GetParent(void) const;
|
|
virtual nsISupportsArray* GetStyleRules(void) const;
|
|
virtual PRInt32 GetStyleRuleCount(void) const;
|
|
virtual PRInt32 GetBackstopStyleRuleCount(void) const;
|
|
virtual void SetBackstopStyleRuleCount(PRInt32 aCount);
|
|
|
|
virtual nsIStyleContext* FindChildWithRules(nsISupportsArray* aRules);
|
|
|
|
virtual PRBool Equals(const nsIStyleContext* aOther) const;
|
|
virtual PRUint32 HashValue(void) const;
|
|
|
|
NS_IMETHOD RemapStyle(nsIPresContext* aPresContext);
|
|
|
|
virtual const nsStyleStruct* GetStyleData(nsStyleStructID aSID);
|
|
virtual nsStyleStruct* GetMutableStyleData(nsStyleStructID aSID);
|
|
|
|
virtual void ForceUnique(void);
|
|
virtual void RecalcAutomaticData(nsIPresContext* aPresContext);
|
|
|
|
virtual void List(FILE* out, PRInt32 aIndent);
|
|
|
|
protected:
|
|
void AppendChild(StyleContextImpl* aChild);
|
|
|
|
StyleContextImpl* mParent;
|
|
StyleContextImpl* mChild;
|
|
StyleContextImpl* mPrevSibling;
|
|
StyleContextImpl* mNextSibling;
|
|
StyleContextImpl* mEmptyChild;
|
|
|
|
StyleContextImpl* mPrevLinear;
|
|
StyleContextImpl* mNextLinear;
|
|
|
|
PRUint32 mRuleHash;
|
|
nsISupportsArray* mRules;
|
|
PRInt32 mBackstopRuleCount;
|
|
PRInt32 mDataCode;
|
|
|
|
// the style data...
|
|
StyleFontImpl mFont;
|
|
StyleColorImpl mColor;
|
|
StyleSpacingImpl mSpacing;
|
|
StyleListImpl mList;
|
|
StylePositionImpl mPosition;
|
|
StyleTextImpl mText;
|
|
StyleDisplayImpl mDisplay;
|
|
StyleTableImpl* mTable;
|
|
|
|
#ifdef DEBUG_REFS
|
|
PRInt32 mInstance;
|
|
#endif
|
|
};
|
|
|
|
static PRInt32 gLastDataCode;
|
|
|
|
#ifdef DEBUG_REFS
|
|
static PRInt32 gInstanceCount;
|
|
static PRInt32 gInstrument = 6;
|
|
#endif
|
|
|
|
PRBool HashStyleRule(nsISupports* aRule, void* aData)
|
|
{
|
|
*((PRUint32*)aData) ^= PRUint32(aRule);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
StyleContextImpl::StyleContextImpl(nsIStyleContext* aParent,
|
|
nsISupportsArray* aRules,
|
|
nsIPresContext* aPresContext)
|
|
: mParent((StyleContextImpl*)aParent), // weak ref
|
|
mChild(nsnull),
|
|
mEmptyChild(nsnull),
|
|
mRules(aRules),
|
|
mBackstopRuleCount(0),
|
|
mDataCode(-1),
|
|
mFont(aPresContext->GetDefaultFont(), aPresContext->GetDefaultFixedFont()),
|
|
mColor(),
|
|
mSpacing(),
|
|
mList(),
|
|
mPosition(),
|
|
mText(),
|
|
mDisplay(),
|
|
mTable(nsnull)
|
|
{
|
|
NS_INIT_REFCNT();
|
|
NS_IF_ADDREF(mRules);
|
|
|
|
mNextSibling = this;
|
|
mPrevSibling = this;
|
|
if (nsnull != mParent) {
|
|
mParent->AppendChild(this);
|
|
}
|
|
|
|
mNextLinear = this;
|
|
mPrevLinear = this;
|
|
|
|
mRuleHash = 0;
|
|
if (nsnull != mRules) {
|
|
mRules->EnumerateForwards(HashStyleRule, &mRuleHash);
|
|
}
|
|
|
|
RemapStyle(aPresContext);
|
|
|
|
#ifdef DEBUG_REFS
|
|
mInstance = ++gInstanceCount;
|
|
fprintf(stdout, "%d of %d + StyleContext\n", mInstance, gInstanceCount);
|
|
#endif
|
|
}
|
|
|
|
StyleContextImpl::~StyleContextImpl()
|
|
{
|
|
mParent = nsnull; // weak ref
|
|
|
|
if (nsnull != mChild) {
|
|
StyleContextImpl* child = mChild;
|
|
do {
|
|
StyleContextImpl* goner = child;
|
|
child = child->mNextSibling;
|
|
NS_RELEASE(goner);
|
|
} while (child != mChild);
|
|
mChild = nsnull;
|
|
}
|
|
NS_IF_RELEASE(mEmptyChild);
|
|
|
|
NS_IF_RELEASE(mRules);
|
|
|
|
if (nsnull != mTable) {
|
|
delete mTable;
|
|
mTable = nsnull;
|
|
}
|
|
|
|
#ifdef DEBUG_REFS
|
|
fprintf(stdout, "%d of %d - StyleContext\n", mInstance, gInstanceCount);
|
|
--gInstanceCount;
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
#ifdef DEBUG_REFS
|
|
NS_IMPL_QUERY_INTERFACE(StyleContextImpl, kIStyleContextIID)
|
|
|
|
nsrefcnt StyleContextImpl::AddRef(void)
|
|
{
|
|
if ((gInstrument == -1) || (mInstance == gInstrument)) {
|
|
fprintf(stdout, "%d AddRef StyleContext %d\n", mRefCnt + 1, mInstance);
|
|
}
|
|
return ++mRefCnt;
|
|
}
|
|
|
|
nsrefcnt StyleContextImpl::Release(void)
|
|
{
|
|
if ((gInstrument == -1) || (mInstance == gInstrument)) {
|
|
fprintf(stdout, "%d Release StyleContext %d\n", mRefCnt - 1, mInstance);
|
|
}
|
|
if (--mRefCnt == 0) {
|
|
delete this;
|
|
return 0;
|
|
}
|
|
return mRefCnt;
|
|
}
|
|
#else
|
|
NS_IMPL_ISUPPORTS(StyleContextImpl, kIStyleContextIID)
|
|
#endif
|
|
|
|
|
|
|
|
nsIStyleContext* StyleContextImpl::GetParent(void) const
|
|
{
|
|
NS_IF_ADDREF(mParent);
|
|
return mParent;
|
|
}
|
|
|
|
void StyleContextImpl::AppendChild(StyleContextImpl* aChild)
|
|
{
|
|
if (0 == aChild->mRules->Count()) {
|
|
NS_ASSERTION(nsnull == mEmptyChild, "shouldn't have two empty children");
|
|
mEmptyChild = aChild;
|
|
}
|
|
else {
|
|
if (nsnull == mChild) {
|
|
mChild = aChild;
|
|
}
|
|
else {
|
|
aChild->mNextSibling = mChild;
|
|
aChild->mPrevSibling = mChild->mPrevSibling;
|
|
mChild->mPrevSibling->mNextSibling = aChild;
|
|
mChild->mPrevSibling = aChild;
|
|
}
|
|
}
|
|
NS_ADDREF(aChild);
|
|
}
|
|
|
|
nsISupportsArray* StyleContextImpl::GetStyleRules(void) const
|
|
{
|
|
NS_IF_ADDREF(mRules);
|
|
return mRules;
|
|
}
|
|
|
|
PRInt32 StyleContextImpl::GetStyleRuleCount(void) const
|
|
{
|
|
if (nsnull != mRules) {
|
|
return mRules->Count();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
PRInt32 StyleContextImpl::GetBackstopStyleRuleCount(void) const
|
|
{
|
|
return mBackstopRuleCount;
|
|
}
|
|
|
|
void StyleContextImpl::SetBackstopStyleRuleCount(PRInt32 aCount)
|
|
{
|
|
NS_PRECONDITION(aCount <= GetStyleRuleCount(), "bad backstop rule count");
|
|
mBackstopRuleCount = aCount;
|
|
}
|
|
|
|
nsIStyleContext* StyleContextImpl::FindChildWithRules(nsISupportsArray* aRules)
|
|
{
|
|
nsIStyleContext* result = nsnull;
|
|
|
|
if ((nsnull != mChild) || (nsnull != mEmptyChild)) {
|
|
StyleContextImpl* child = mChild;
|
|
PRInt32 ruleCount = aRules->Count();
|
|
if (0 == ruleCount) {
|
|
result = mEmptyChild;
|
|
NS_IF_ADDREF(result);
|
|
}
|
|
else if (nsnull != mChild) {
|
|
PRUint32 hash = 0;
|
|
aRules->EnumerateForwards(HashStyleRule, &hash);
|
|
do {
|
|
if ((0 == child->mDataCode) && // only look at children with un-twiddled data
|
|
(child->mRuleHash == hash) &&
|
|
(child->GetStyleRuleCount() == ruleCount)) {
|
|
if (child->mRules->Equals(aRules)) {
|
|
result = child;
|
|
NS_ADDREF(result);
|
|
break;
|
|
}
|
|
}
|
|
child = child->mNextSibling;
|
|
} while (child != mChild);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
PRBool StyleContextImpl::Equals(const nsIStyleContext* aOther) const
|
|
{
|
|
PRBool result = PR_TRUE;
|
|
const StyleContextImpl* other = (StyleContextImpl*)aOther;
|
|
|
|
if (other != this) {
|
|
if (mParent != other->mParent) {
|
|
result = PR_FALSE;
|
|
}
|
|
else if (mDataCode != other->mDataCode) {
|
|
result = PR_FALSE;
|
|
}
|
|
else {
|
|
if ((nsnull != mRules) && (nsnull != other->mRules)) {
|
|
result = mRules->Equals(other->mRules);
|
|
}
|
|
else {
|
|
result = PRBool((nsnull == mRules) && (nsnull == other->mRules));
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
PRUint32 StyleContextImpl::HashValue(void) const
|
|
{
|
|
return mRuleHash;
|
|
}
|
|
|
|
|
|
const nsStyleStruct* StyleContextImpl::GetStyleData(nsStyleStructID aSID)
|
|
{
|
|
nsStyleStruct* result = nsnull;
|
|
|
|
switch (aSID) {
|
|
case eStyleStruct_Font:
|
|
result = &mFont;
|
|
break;
|
|
case eStyleStruct_Color:
|
|
result = &mColor;
|
|
break;
|
|
case eStyleStruct_Spacing:
|
|
result = &mSpacing;
|
|
break;
|
|
case eStyleStruct_List:
|
|
result = &mList;
|
|
break;
|
|
case eStyleStruct_Position:
|
|
result = &mPosition;
|
|
break;
|
|
case eStyleStruct_Text:
|
|
result = &mText;
|
|
break;
|
|
case eStyleStruct_Display:
|
|
result = &mDisplay;
|
|
break;
|
|
case eStyleStruct_Table: // this one gets created lazily
|
|
if (nsnull == mTable) {
|
|
mTable = new StyleTableImpl();
|
|
if (nsnull != mParent) {
|
|
if (nsnull != mParent->mTable) {
|
|
mTable->ResetFrom(mParent->mTable, nsnull);
|
|
}
|
|
}
|
|
}
|
|
result = mTable;
|
|
break;
|
|
default:
|
|
NS_ERROR("Invalid style struct id");
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
nsStyleStruct* StyleContextImpl::GetMutableStyleData(nsStyleStructID aSID)
|
|
{
|
|
nsStyleStruct* result = nsnull;
|
|
|
|
switch (aSID) {
|
|
case eStyleStruct_Font:
|
|
result = &mFont;
|
|
break;
|
|
case eStyleStruct_Color:
|
|
result = &mColor;
|
|
break;
|
|
case eStyleStruct_Spacing:
|
|
result = &mSpacing;
|
|
break;
|
|
case eStyleStruct_List:
|
|
result = &mList;
|
|
break;
|
|
case eStyleStruct_Position:
|
|
result = &mPosition;
|
|
break;
|
|
case eStyleStruct_Text:
|
|
result = &mText;
|
|
break;
|
|
case eStyleStruct_Display:
|
|
result = &mDisplay;
|
|
break;
|
|
case eStyleStruct_Table: // this one gets created lazily
|
|
if (nsnull == mTable) {
|
|
mTable = new StyleTableImpl();
|
|
if (nsnull != mParent) {
|
|
if (nsnull != mParent->mTable) {
|
|
mTable->ResetFrom(mParent->mTable, nsnull);
|
|
}
|
|
}
|
|
}
|
|
result = mTable;
|
|
break;
|
|
default:
|
|
NS_ERROR("Invalid style struct id");
|
|
break;
|
|
}
|
|
if (nsnull != result) {
|
|
if (0 == mDataCode) {
|
|
// mDataCode = ++gLastDataCode; // XXX temp disable, this is still used but not needed to force unique
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
struct MapStyleData {
|
|
MapStyleData(nsIStyleContext* aStyleContext, nsIPresContext* aPresContext)
|
|
{
|
|
mStyleContext = aStyleContext;
|
|
mPresContext = aPresContext;
|
|
}
|
|
nsIStyleContext* mStyleContext;
|
|
nsIPresContext* mPresContext;
|
|
};
|
|
|
|
PRBool MapStyleRule(nsISupports* aRule, void* aData)
|
|
{
|
|
nsIStyleRule* rule = (nsIStyleRule*)aRule;
|
|
MapStyleData* data = (MapStyleData*)aData;
|
|
rule->MapStyleInto(data->mStyleContext, data->mPresContext);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
StyleContextImpl::RemapStyle(nsIPresContext* aPresContext)
|
|
{
|
|
mDataCode = -1;
|
|
if (nsnull != mParent) {
|
|
mFont.ResetFrom(&(mParent->mFont), aPresContext);
|
|
mColor.ResetFrom(&(mParent->mColor), aPresContext);
|
|
mSpacing.ResetFrom(&(mParent->mSpacing), aPresContext);
|
|
mList.ResetFrom(&(mParent->mList), aPresContext);
|
|
mText.ResetFrom(&(mParent->mText), aPresContext);
|
|
mPosition.ResetFrom(&(mParent->mPosition), aPresContext);
|
|
mDisplay.ResetFrom(&(mParent->mDisplay), aPresContext);
|
|
}
|
|
else {
|
|
mFont.ResetFrom(nsnull, aPresContext);
|
|
mColor.ResetFrom(nsnull, aPresContext);
|
|
mSpacing.ResetFrom(nsnull, aPresContext);
|
|
mList.ResetFrom(nsnull, aPresContext);
|
|
mText.ResetFrom(nsnull, aPresContext);
|
|
mPosition.ResetFrom(nsnull, aPresContext);
|
|
mDisplay.ResetFrom(nsnull, aPresContext);
|
|
}
|
|
|
|
if ((nsnull != mRules) && (0 < mRules->Count())) {
|
|
MapStyleData data(this, aPresContext);
|
|
mRules->EnumerateForwards(MapStyleRule, &data);
|
|
}
|
|
if (-1 == mDataCode) {
|
|
mDataCode = 0;
|
|
}
|
|
if ((mDisplay.mDisplay == NS_STYLE_DISPLAY_TABLE_CELL) ||
|
|
(mDisplay.mDisplay == NS_STYLE_DISPLAY_TABLE_CAPTION)) {
|
|
// time to emulate a sub-document
|
|
// This is ugly, but we need to map style once to determine display type
|
|
// then reset and map it again so that all local style is preserved
|
|
mFont.ResetFrom(nsnull, aPresContext);
|
|
mColor.ResetFrom(nsnull, aPresContext);
|
|
mSpacing.ResetFrom(nsnull, aPresContext);
|
|
mList.ResetFrom(nsnull, aPresContext);
|
|
mText.ResetFrom(nsnull, aPresContext);
|
|
mPosition.ResetFrom(nsnull, aPresContext);
|
|
mDisplay.ResetFrom(nsnull, aPresContext);
|
|
|
|
if ((nsnull != mRules) && (0 < mRules->Count())) {
|
|
MapStyleData data(this, aPresContext);
|
|
mRules->EnumerateForwards(MapStyleRule, &data);
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void StyleContextImpl::ForceUnique(void)
|
|
{
|
|
if (mDataCode <= 0) {
|
|
mDataCode = ++gLastDataCode;
|
|
}
|
|
}
|
|
|
|
void StyleContextImpl::RecalcAutomaticData(nsIPresContext* aPresContext)
|
|
{
|
|
mSpacing.RecalcData(aPresContext);
|
|
}
|
|
|
|
void StyleContextImpl::List(FILE* out, PRInt32 aIndent)
|
|
{
|
|
// Indent
|
|
PRInt32 index;
|
|
for (index = aIndent; --index >= 0; ) fputs(" ", out);
|
|
PRInt32 count = mRules->Count();
|
|
if (0 < count) {
|
|
fputs("{\n", out);
|
|
|
|
for (index = 0; index < count; index++) {
|
|
nsIStyleRule* rule = (nsIStyleRule*)mRules->ElementAt(index);
|
|
rule->List(out, aIndent + 1);
|
|
NS_RELEASE(rule);
|
|
}
|
|
|
|
for (index = aIndent; --index >= 0; ) fputs(" ", out);
|
|
fputs("}\n", out);
|
|
}
|
|
else {
|
|
fputs("{}\n", out);
|
|
}
|
|
|
|
if (nsnull != mChild) {
|
|
StyleContextImpl* child = mChild;
|
|
do {
|
|
child->List(out, aIndent + 1);
|
|
child = child->mNextSibling;
|
|
} while (mChild != child);
|
|
}
|
|
if (nsnull != mEmptyChild) {
|
|
mEmptyChild->List(out, aIndent + 1);
|
|
}
|
|
}
|
|
|
|
NS_LAYOUT nsresult
|
|
NS_NewStyleContext(nsIStyleContext** aInstancePtrResult,
|
|
nsIStyleContext* aParentContext,
|
|
nsISupportsArray* aRules,
|
|
nsIPresContext* aPresContext)
|
|
{
|
|
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
|
|
if (nsnull == aInstancePtrResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
StyleContextImpl* context = new StyleContextImpl(aParentContext, aRules, aPresContext);
|
|
if (nsnull == context) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
context->RecalcAutomaticData(aPresContext);
|
|
|
|
return context->QueryInterface(kIStyleContextIID, (void **) aInstancePtrResult);
|
|
}
|