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gecko-dev/layout/style/nsStyleContext.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsString.h"
#include "nsUnitConversion.h"
#include "nsIPresContext.h"
#include "nsIStyleRule.h"
#include "nsISupportsArray.h"
#include "nsCRT.h"
#include "nsIFrame.h"
//#define DEBUG_REFS
static NS_DEFINE_IID(kIStyleContextIID, NS_ISTYLECONTEXT_IID);
#define DELETE_ARRAY_IF(array) if (array) { delete[] array; array = nsnull; }
// --------------------
// nsStyleFont
//
nsStyleFont::nsStyleFont(const nsFont& aVariableFont, const nsFont& aFixedFont)
: mFont(aVariableFont),
mFixedFont(aFixedFont)
{ }
nsStyleFont::~nsStyleFont(void) { }
struct StyleFontImpl : public nsStyleFont {
StyleFontImpl(const nsFont& aVariableFont, const nsFont& aFixedFont)
: nsStyleFont(aVariableFont, aFixedFont)
{}
void ResetFrom(const nsStyleFont* aParent, nsIPresContext* aPresContext);
PRInt32 CalcDifference(const StyleFontImpl& aOther) const;
private: // These are not allowed
StyleFontImpl(const StyleFontImpl& aOther);
StyleFontImpl& operator=(const StyleFontImpl& aOther);
};
void StyleFontImpl::ResetFrom(const nsStyleFont* aParent, nsIPresContext* aPresContext)
{
if (nsnull != aParent) {
mFont = aParent->mFont;
mFixedFont = aParent->mFixedFont;
mFlags = aParent->mFlags;
}
else {
aPresContext->GetDefaultFont(mFont);
aPresContext->GetDefaultFixedFont(mFixedFont);
mFlags = NS_STYLE_FONT_DEFAULT;
}
}
PRInt32 StyleFontImpl::CalcDifference(const StyleFontImpl& aOther) const
{
if (mFont.Equals(aOther.mFont) && mFixedFont.Equals(aOther.mFixedFont) &&
(mFlags == aOther.mFlags)) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
// --------------------
// nsStyleColor
//
nsStyleColor::nsStyleColor(void) { }
nsStyleColor::~nsStyleColor(void) { }
struct StyleColorImpl: public nsStyleColor {
StyleColorImpl(void) { }
void ResetFrom(const nsStyleColor* aParent, nsIPresContext* aPresContext);
PRInt32 CalcDifference(const StyleColorImpl& aOther) const;
private: // These are not allowed
StyleColorImpl(const StyleColorImpl& aOther);
StyleColorImpl& operator=(const StyleColorImpl& aOther);
};
void StyleColorImpl::ResetFrom(const nsStyleColor* aParent, nsIPresContext* aPresContext)
{
if (nsnull != aParent) {
mColor = aParent->mColor;
mOpacity = aParent->mOpacity;
}
else {
if (nsnull != aPresContext) {
aPresContext->GetDefaultColor(&mColor);
}
else {
mColor = NS_RGB(0x00, 0x00, 0x00);
}
mOpacity = 1.0f;
}
mBackgroundAttachment = NS_STYLE_BG_ATTACHMENT_SCROLL;
mBackgroundFlags = NS_STYLE_BG_COLOR_TRANSPARENT | NS_STYLE_BG_IMAGE_NONE;
mBackgroundRepeat = NS_STYLE_BG_REPEAT_XY;
if (nsnull != aPresContext) {
aPresContext->GetDefaultBackgroundColor(&mBackgroundColor);
}
else {
mBackgroundColor = NS_RGB(192,192,192);
}
mBackgroundXPosition = 0;
mBackgroundYPosition = 0;
mCursor = NS_STYLE_CURSOR_AUTO;
}
PRInt32 StyleColorImpl::CalcDifference(const StyleColorImpl& aOther) const
{
if ((mColor == aOther.mColor) &&
(mBackgroundAttachment == aOther.mBackgroundAttachment) &&
(mBackgroundFlags == aOther.mBackgroundFlags) &&
(mBackgroundRepeat == aOther.mBackgroundRepeat) &&
(mBackgroundColor == aOther.mBackgroundColor) &&
(mBackgroundXPosition == aOther.mBackgroundXPosition) &&
(mBackgroundYPosition == aOther.mBackgroundYPosition) &&
(mBackgroundImage == aOther.mBackgroundImage) &&
(mCursor == aOther.mCursor) &&
(mCursorImage == aOther.mCursorImage) &&
(mOpacity == aOther.mOpacity)) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_VISUAL;
}
// --------------------
// nsStyleSpacing
//
// XXX this is here to support deprecated calc spacing methods only
static nscoord kBorderWidths[3];
static PRBool kWidthsInitialized = PR_FALSE;
nsStyleSpacing::nsStyleSpacing(void) { }
#define NS_SPACING_MARGIN 0
#define NS_SPACING_PADDING 1
#define NS_SPACING_BORDER 2
static nscoord CalcSideFor(const nsIFrame* aFrame, const nsStyleCoord& aCoord,
PRUint8 aSpacing, PRUint8 aSide,
const nscoord* aEnumTable, PRInt32 aNumEnums)
{
nscoord result = 0;
switch (aCoord.GetUnit()) {
case eStyleUnit_Auto:
// Auto margins are handled by layout
break;
case eStyleUnit_Inherit:
nsIFrame* parentFrame;
aFrame->GetParent(&parentFrame); // XXX may not be direct parent...
if (nsnull != parentFrame) {
nsIStyleContext* parentContext;
parentFrame->GetStyleContext(&parentContext);
if (nsnull != parentContext) {
const nsStyleSpacing* parentSpacing = (const nsStyleSpacing*)parentContext->GetStyleData(eStyleStruct_Spacing);
nsMargin parentMargin;
switch (aSpacing) {
case NS_SPACING_MARGIN: parentSpacing->CalcMarginFor(parentFrame, parentMargin);
break;
case NS_SPACING_PADDING: parentSpacing->CalcPaddingFor(parentFrame, parentMargin);
break;
case NS_SPACING_BORDER: parentSpacing->CalcBorderFor(parentFrame, parentMargin);
break;
}
switch (aSide) {
case NS_SIDE_LEFT: result = parentMargin.left; break;
case NS_SIDE_TOP: result = parentMargin.top; break;
case NS_SIDE_RIGHT: result = parentMargin.right; break;
case NS_SIDE_BOTTOM: result = parentMargin.bottom; break;
}
NS_RELEASE(parentContext);
}
}
break;
case eStyleUnit_Percent:
{
nscoord baseWidth = 0;
PRBool isBase = PR_FALSE;
nsIFrame* frame;
aFrame->GetParent(&frame);
while (nsnull != frame) {
frame->IsPercentageBase(isBase);
if (isBase) {
nsSize size;
frame->GetSize(size);
baseWidth = size.width; // not really width, need to subtract out padding...
break;
}
frame->GetParent(&frame);
}
result = (nscoord)((float)baseWidth * aCoord.GetPercentValue());
}
break;
case eStyleUnit_Coord:
result = aCoord.GetCoordValue();
break;
case eStyleUnit_Enumerated:
if (nsnull != aEnumTable) {
PRInt32 value = aCoord.GetIntValue();
if ((0 <= value) && (value < aNumEnums)) {
return aEnumTable[aCoord.GetIntValue()];
}
}
break;
case eStyleUnit_Null:
case eStyleUnit_Normal:
case eStyleUnit_Integer:
case eStyleUnit_Proportional:
default:
result = 0;
break;
}
if ((NS_SPACING_PADDING == aSpacing) || (NS_SPACING_BORDER == aSpacing)) {
if (result < 0) {
result = 0;
}
}
return result;
}
static void CalcSidesFor(const nsIFrame* aFrame, const nsStyleSides& aSides,
PRUint8 aSpacing,
const nscoord* aEnumTable, PRInt32 aNumEnums,
nsMargin& aResult)
{
nsStyleCoord coord;
aResult.left = CalcSideFor(aFrame, aSides.GetLeft(coord), aSpacing, NS_SIDE_LEFT,
aEnumTable, aNumEnums);
aResult.top = CalcSideFor(aFrame, aSides.GetTop(coord), aSpacing, NS_SIDE_TOP,
aEnumTable, aNumEnums);
aResult.right = CalcSideFor(aFrame, aSides.GetRight(coord), aSpacing, NS_SIDE_RIGHT,
aEnumTable, aNumEnums);
aResult.bottom = CalcSideFor(aFrame, aSides.GetBottom(coord), aSpacing, NS_SIDE_BOTTOM,
aEnumTable, aNumEnums);
}
void nsStyleSpacing::CalcMarginFor(const nsIFrame* aFrame, nsMargin& aMargin) const
{
if (mHasCachedMargin) {
aMargin = mCachedMargin;
}
else {
CalcSidesFor(aFrame, mMargin, NS_SPACING_MARGIN, nsnull, 0, aMargin);
}
}
void nsStyleSpacing::CalcPaddingFor(const nsIFrame* aFrame, nsMargin& aPadding) const
{
if (mHasCachedPadding) {
aPadding = mCachedPadding;
}
else {
CalcSidesFor(aFrame, mPadding, NS_SPACING_PADDING, nsnull, 0, aPadding);
}
}
void nsStyleSpacing::CalcBorderFor(const nsIFrame* aFrame, nsMargin& aBorder) const
{
if (mHasCachedBorder) {
aBorder = mCachedBorder;
}
else {
CalcSidesFor(aFrame, mBorder, NS_SPACING_BORDER, kBorderWidths, 3, aBorder);
}
}
void nsStyleSpacing::CalcBorderPaddingFor(const nsIFrame* aFrame, nsMargin& aBorderPadding) const
{
if (mHasCachedPadding && mHasCachedBorder) {
aBorderPadding = mCachedBorderPadding;
}
else {
nsMargin border;
CalcBorderFor(aFrame, border);
CalcPaddingFor(aFrame, aBorderPadding);
aBorderPadding += border;
}
}
PRBool nsStyleSpacing::GetMargin(nsMargin& aMargin) const
{
if (mHasCachedMargin) {
aMargin = mCachedMargin;
return PR_TRUE;
}
return PR_FALSE;
}
PRBool nsStyleSpacing::GetPadding(nsMargin& aPadding) const
{
if (mHasCachedPadding) {
aPadding = mCachedPadding;
return PR_TRUE;
}
return PR_FALSE;
}
PRBool nsStyleSpacing::GetBorder(nsMargin& aBorder) const
{
if (mHasCachedBorder) {
aBorder = mCachedBorder;
return PR_TRUE;
}
return PR_FALSE;
}
PRBool nsStyleSpacing::GetBorderPadding(nsMargin& aBorderPadding) const
{
if (mHasCachedPadding && mHasCachedBorder) {
aBorderPadding = mCachedBorderPadding;
return PR_TRUE;
}
return PR_FALSE;
}
#define BORDER_COLOR_DEFINED 0x80
#define BORDER_COLOR_SPECIAL 0x40
#define BORDER_STYLE_MASK 0x3F
PRUint8 nsStyleSpacing::GetBorderStyle(PRUint8 aSide) const
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
return (mBorderStyle[aSide] & BORDER_STYLE_MASK);
}
void nsStyleSpacing::SetBorderStyle(PRUint8 aSide, PRUint8 aStyle)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderStyle[aSide] &= ~BORDER_STYLE_MASK;
mBorderStyle[aSide] |= (aStyle & BORDER_STYLE_MASK);
}
PRBool nsStyleSpacing::GetBorderColor(PRUint8 aSide, nscolor& aColor) const
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
if ((mBorderStyle[aSide] & BORDER_COLOR_SPECIAL) == 0) {
aColor = mBorderColor[aSide];
return PR_TRUE;
}
return PR_FALSE;
}
void nsStyleSpacing::SetBorderColor(PRUint8 aSide, nscolor aColor)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderColor[aSide] = aColor;
mBorderStyle[aSide] &= ~BORDER_COLOR_SPECIAL;
mBorderStyle[aSide] |= BORDER_COLOR_DEFINED;
}
void nsStyleSpacing::SetBorderTransparent(PRUint8 aSide)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderStyle[aSide] |= (BORDER_COLOR_DEFINED | BORDER_COLOR_SPECIAL);
}
void nsStyleSpacing::UnsetBorderColor(PRUint8 aSide)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderStyle[aSide] &= BORDER_STYLE_MASK;
}
PRBool nsStyleSpacing::GetOutlineWidth(nscoord& aWidth) const
{
if (mHasCachedOutline) {
aWidth = mCachedOutlineWidth;
return PR_TRUE;
}
return PR_FALSE;
}
PRUint8 nsStyleSpacing::GetOutlineStyle(void) const
{
return (mOutlineStyle & BORDER_STYLE_MASK);
}
void nsStyleSpacing::SetOutlineStyle(PRUint8 aStyle)
{
mOutlineStyle &= ~BORDER_STYLE_MASK;
mOutlineStyle |= (aStyle & BORDER_STYLE_MASK);
}
PRBool nsStyleSpacing::GetOutlineColor(nscolor& aColor) const
{
if ((mOutlineStyle & BORDER_COLOR_SPECIAL) == 0) {
aColor = mOutlineColor;
return PR_TRUE;
}
return PR_FALSE;
}
void nsStyleSpacing::SetOutlineColor(nscolor aColor)
{
mOutlineColor = aColor;
mOutlineStyle &= ~BORDER_COLOR_SPECIAL;
mOutlineStyle |= BORDER_COLOR_DEFINED;
}
void nsStyleSpacing::SetOutlineInvert(void)
{
mOutlineStyle |= (BORDER_COLOR_DEFINED | BORDER_COLOR_SPECIAL);
}
struct StyleSpacingImpl: public nsStyleSpacing {
StyleSpacingImpl(void)
: nsStyleSpacing()
{}
void ResetFrom(const nsStyleSpacing* aParent, nsIPresContext* aPresContext);
void RecalcData(nsIPresContext* aPresContext, nscolor color);
PRInt32 CalcDifference(const StyleSpacingImpl& aOther) const;
};
void StyleSpacingImpl::ResetFrom(const nsStyleSpacing* aParent, nsIPresContext* aPresContext)
{
// XXX support kBorderWidhts until deprecated methods are removed
if (! kWidthsInitialized) {
float pixelsToTwips = 20.0f;
if (aPresContext) {
aPresContext->GetPixelsToTwips(&pixelsToTwips);
}
kBorderWidths[NS_STYLE_BORDER_WIDTH_THIN] = NSIntPixelsToTwips(1, pixelsToTwips);
kBorderWidths[NS_STYLE_BORDER_WIDTH_MEDIUM] = NSIntPixelsToTwips(3, pixelsToTwips);
kBorderWidths[NS_STYLE_BORDER_WIDTH_THICK] = NSIntPixelsToTwips(5, pixelsToTwips);
kWidthsInitialized = PR_TRUE;
}
// spacing values not inherited
mMargin.Reset();
mPadding.Reset();
nsStyleCoord medium(NS_STYLE_BORDER_WIDTH_MEDIUM, eStyleUnit_Enumerated);
mBorder.SetLeft(medium);
mBorder.SetTop(medium);
mBorder.SetRight(medium);
mBorder.SetBottom(medium);
mBorderStyle[0] = NS_STYLE_BORDER_STYLE_NONE;
mBorderStyle[1] = NS_STYLE_BORDER_STYLE_NONE;
mBorderStyle[2] = NS_STYLE_BORDER_STYLE_NONE;
mBorderStyle[3] = NS_STYLE_BORDER_STYLE_NONE;
mBorderColor[0] = NS_RGB(0, 0, 0);
mBorderColor[1] = NS_RGB(0, 0, 0);
mBorderColor[2] = NS_RGB(0, 0, 0);
mBorderColor[3] = NS_RGB(0, 0, 0);
mBorderRadius.SetCoordValue(0);
mOutlineWidth = medium;
mOutlineStyle = NS_STYLE_BORDER_STYLE_NONE;
mOutlineColor = NS_RGB(0, 0, 0);
mHasCachedMargin = PR_FALSE;
mHasCachedPadding = PR_FALSE;
mHasCachedBorder = PR_FALSE;
mHasCachedOutline = PR_FALSE;
}
inline PRBool IsFixedUnit(nsStyleUnit aUnit, PRBool aEnumOK)
{
return PRBool((aUnit == eStyleUnit_Null) ||
(aUnit == eStyleUnit_Coord) ||
(aEnumOK && (aUnit == eStyleUnit_Enumerated)));
}
static PRBool IsFixedData(const nsStyleSides& aSides, PRBool aEnumOK)
{
return PRBool(IsFixedUnit(aSides.GetLeftUnit(), aEnumOK) &&
IsFixedUnit(aSides.GetTopUnit(), aEnumOK) &&
IsFixedUnit(aSides.GetRightUnit(), aEnumOK) &&
IsFixedUnit(aSides.GetBottomUnit(), aEnumOK));
}
static nscoord CalcCoord(const nsStyleCoord& aCoord,
const nscoord* aEnumTable,
PRInt32 aNumEnums)
{
switch (aCoord.GetUnit()) {
case eStyleUnit_Null:
return 0;
case eStyleUnit_Coord:
return aCoord.GetCoordValue();
case eStyleUnit_Enumerated:
if (nsnull != aEnumTable) {
PRInt32 value = aCoord.GetIntValue();
if ((0 <= value) && (value < aNumEnums)) {
return aEnumTable[aCoord.GetIntValue()];
}
}
break;
default:
NS_ERROR("bad unit type");
break;
}
return 0;
}
void StyleSpacingImpl::RecalcData(nsIPresContext* aPresContext, nscolor aColor)
{
nscoord borderWidths[3];
float pixelsToTwips = 20.0f;
if (aPresContext) {
aPresContext->GetPixelsToTwips(&pixelsToTwips);
}
borderWidths[NS_STYLE_BORDER_WIDTH_THIN] = NSIntPixelsToTwips(1, pixelsToTwips);
borderWidths[NS_STYLE_BORDER_WIDTH_MEDIUM] = NSIntPixelsToTwips(3, pixelsToTwips);
borderWidths[NS_STYLE_BORDER_WIDTH_THICK] = NSIntPixelsToTwips(5, pixelsToTwips);
if (IsFixedData(mMargin, PR_FALSE)) {
nsStyleCoord coord;
mCachedMargin.left = CalcCoord(mMargin.GetLeft(coord), nsnull, 0);
mCachedMargin.top = CalcCoord(mMargin.GetTop(coord), nsnull, 0);
mCachedMargin.right = CalcCoord(mMargin.GetRight(coord), nsnull, 0);
mCachedMargin.bottom = CalcCoord(mMargin.GetBottom(coord), nsnull, 0);
mHasCachedMargin = PR_TRUE;
}
else {
mHasCachedMargin = PR_FALSE;
}
if (IsFixedData(mPadding, PR_FALSE)) {
nsStyleCoord coord;
mCachedPadding.left = CalcCoord(mPadding.GetLeft(coord), nsnull, 0);
mCachedPadding.top = CalcCoord(mPadding.GetTop(coord), nsnull, 0);
mCachedPadding.right = CalcCoord(mPadding.GetRight(coord), nsnull, 0);
mCachedPadding.bottom = CalcCoord(mPadding.GetBottom(coord), nsnull, 0);
mHasCachedPadding = PR_TRUE;
}
else {
mHasCachedPadding = PR_FALSE;
}
if (((NS_STYLE_BORDER_STYLE_NONE == GetBorderStyle(NS_SIDE_LEFT))||
IsFixedUnit(mBorder.GetLeftUnit(), PR_TRUE)) &&
((NS_STYLE_BORDER_STYLE_NONE == GetBorderStyle(NS_SIDE_TOP)) ||
IsFixedUnit(mBorder.GetTopUnit(), PR_TRUE)) &&
((NS_STYLE_BORDER_STYLE_NONE == GetBorderStyle(NS_SIDE_RIGHT)) ||
IsFixedUnit(mBorder.GetRightUnit(), PR_TRUE)) &&
((NS_STYLE_BORDER_STYLE_NONE == GetBorderStyle(NS_SIDE_BOTTOM)) ||
IsFixedUnit(mBorder.GetBottomUnit(), PR_TRUE))) {
nsStyleCoord coord;
if (NS_STYLE_BORDER_STYLE_NONE == GetBorderStyle(NS_SIDE_LEFT)) {
mCachedBorder.left = 0;
}
else {
mCachedBorder.left = CalcCoord(mBorder.GetLeft(coord), borderWidths, 3);
}
if (NS_STYLE_BORDER_STYLE_NONE == GetBorderStyle(NS_SIDE_TOP)) {
mCachedBorder.top = 0;
}
else {
mCachedBorder.top = CalcCoord(mBorder.GetTop(coord), borderWidths, 3);
}
if (NS_STYLE_BORDER_STYLE_NONE == GetBorderStyle(NS_SIDE_RIGHT)) {
mCachedBorder.right = 0;
}
else {
mCachedBorder.right = CalcCoord(mBorder.GetRight(coord), borderWidths, 3);
}
if (NS_STYLE_BORDER_STYLE_NONE == GetBorderStyle(NS_SIDE_BOTTOM)) {
mCachedBorder.bottom = 0;
}
else {
mCachedBorder.bottom = CalcCoord(mBorder.GetBottom(coord), borderWidths, 3);
}
mHasCachedBorder = PR_TRUE;
}
else {
mHasCachedBorder = PR_FALSE;
}
if (mHasCachedBorder && mHasCachedPadding) {
mCachedBorderPadding = mCachedPadding;
mCachedBorderPadding += mCachedBorder;
}
if ((mBorderStyle[NS_SIDE_TOP] & BORDER_COLOR_DEFINED) == 0) {
mBorderColor[NS_SIDE_TOP] = aColor;
}
if ((mBorderStyle[NS_SIDE_BOTTOM] & BORDER_COLOR_DEFINED) == 0) {
mBorderColor[NS_SIDE_BOTTOM] = aColor;
}
if ((mBorderStyle[NS_SIDE_LEFT]& BORDER_COLOR_DEFINED) == 0) {
mBorderColor[NS_SIDE_LEFT] = aColor;
}
if ((mBorderStyle[NS_SIDE_RIGHT] & BORDER_COLOR_DEFINED) == 0) {
mBorderColor[NS_SIDE_RIGHT] = aColor;
}
if ((NS_STYLE_BORDER_STYLE_NONE == GetOutlineStyle()) ||
IsFixedUnit(mOutlineWidth.GetUnit(), PR_TRUE)) {
if (NS_STYLE_BORDER_STYLE_NONE == GetOutlineStyle()) {
mCachedOutlineWidth = 0;
}
else {
mCachedOutlineWidth = CalcCoord(mOutlineWidth, borderWidths, 3);
}
}
else {
mHasCachedOutline = PR_FALSE;
}
}
PRInt32 StyleSpacingImpl::CalcDifference(const StyleSpacingImpl& aOther) const
{
if ((mMargin == aOther.mMargin) &&
(mPadding == aOther.mPadding) &&
(mBorder == aOther.mBorder)) {
PRInt32 index;
for (index = 0; index < 4; index++) {
if ((mBorderStyle[index] != aOther.mBorderStyle[index]) ||
(mBorderColor[index] != aOther.mBorderColor[index])) {
if ((NS_STYLE_BORDER_STYLE_NONE == mBorderStyle[index]) ||
(NS_STYLE_BORDER_STYLE_NONE == aOther.mBorderStyle[index])) {
return NS_STYLE_HINT_REFLOW; // border on or off
}
return NS_STYLE_HINT_VISUAL;
}
}
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
// --------------------
// nsStyleList
//
nsStyleList::nsStyleList(void) { }
nsStyleList::~nsStyleList(void) { }
struct StyleListImpl: public nsStyleList {
StyleListImpl(void) { }
void ResetFrom(const nsStyleList* aParent, nsIPresContext* aPresContext);
PRInt32 CalcDifference(const StyleListImpl& aOther) const;
};
void StyleListImpl::ResetFrom(const nsStyleList* aParent, nsIPresContext* aPresContext)
{
if (nsnull != aParent) {
mListStyleType = aParent->mListStyleType;
mListStyleImage = aParent->mListStyleImage;
mListStylePosition = aParent->mListStylePosition;
}
else {
mListStyleType = NS_STYLE_LIST_STYLE_BASIC;
mListStylePosition = NS_STYLE_LIST_STYLE_POSITION_OUTSIDE;
mListStyleImage.Truncate();
}
}
PRInt32 StyleListImpl::CalcDifference(const StyleListImpl& aOther) const
{
if (mListStylePosition == aOther.mListStylePosition) {
if (mListStyleImage == aOther.mListStyleImage) {
if (mListStyleType == aOther.mListStyleType) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_CONTENT;
}
return NS_STYLE_HINT_REFLOW;
}
// --------------------
// nsStylePosition
//
nsStylePosition::nsStylePosition(void) { }
struct StylePositionImpl: public nsStylePosition {
StylePositionImpl(void) { }
void ResetFrom(const nsStylePosition* aParent, nsIPresContext* aPresContext);
PRInt32 CalcDifference(const StylePositionImpl& aOther) const;
private: // These are not allowed
StylePositionImpl(const StylePositionImpl& aOther);
StylePositionImpl& operator=(const StylePositionImpl& aOther);
};
void StylePositionImpl::ResetFrom(const nsStylePosition* aParent, nsIPresContext* aPresContext)
{
// positioning values not inherited
mPosition = NS_STYLE_POSITION_NORMAL;
nsStyleCoord autoCoord(eStyleUnit_Auto);
mOffset.SetLeft(autoCoord);
mOffset.SetTop(autoCoord);
mOffset.SetRight(autoCoord);
mOffset.SetBottom(autoCoord);
mWidth.SetAutoValue();
mMinWidth.SetCoordValue(0);
mMaxWidth.Reset();
mHeight.SetAutoValue();
mMinHeight.SetCoordValue(0);
mMaxHeight.Reset();
mZIndex.SetAutoValue();
}
PRInt32 StylePositionImpl::CalcDifference(const StylePositionImpl& aOther) const
{
if (mPosition == aOther.mPosition) {
if ((mOffset == aOther.mOffset) &&
(mWidth == aOther.mWidth) &&
(mMinWidth == aOther.mMinWidth) &&
(mMaxWidth == aOther.mMaxWidth) &&
(mHeight == aOther.mHeight) &&
(mMinHeight == aOther.mMinHeight) &&
(mMaxHeight == aOther.mMaxHeight) &&
(mZIndex == aOther.mZIndex)) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_FRAMECHANGE;
}
// --------------------
// nsStyleText
//
nsStyleText::nsStyleText(void) { }
struct StyleTextImpl: public nsStyleText {
StyleTextImpl(void) { }
void ResetFrom(const nsStyleText* aParent, nsIPresContext* aPresContext);
PRInt32 CalcDifference(const StyleTextImpl& aOther) const;
};
void StyleTextImpl::ResetFrom(const nsStyleText* aParent, nsIPresContext* aPresContext)
{
// These properties not inherited
mTextDecoration = NS_STYLE_TEXT_DECORATION_NONE;
mVerticalAlign.SetIntValue(NS_STYLE_VERTICAL_ALIGN_BASELINE, eStyleUnit_Enumerated);
// mVerticalAlign.Reset(); TBI
if (nsnull != aParent) {
mTextAlign = aParent->mTextAlign;
mTextTransform = aParent->mTextTransform;
mWhiteSpace = aParent->mWhiteSpace;
mLetterSpacing = aParent->mLetterSpacing;
mLineHeight.SetInheritValue();
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();
}
}
PRInt32 StyleTextImpl::CalcDifference(const StyleTextImpl& aOther) const
{
if ((mTextAlign == aOther.mTextAlign) &&
(mTextTransform == aOther.mTextTransform) &&
(mWhiteSpace == aOther.mWhiteSpace) &&
(mLetterSpacing == aOther.mLetterSpacing) &&
(mLineHeight == aOther.mLineHeight) &&
(mTextIndent == aOther.mTextIndent) &&
(mWordSpacing == aOther.mWordSpacing) &&
(mVerticalAlign == aOther.mVerticalAlign)) {
if (mTextDecoration == aOther.mTextDecoration) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
// --------------------
// nsStyleDisplay
//
nsStyleDisplay::nsStyleDisplay(void) { }
struct StyleDisplayImpl: public nsStyleDisplay {
StyleDisplayImpl(void) { }
void ResetFrom(const nsStyleDisplay* aParent, nsIPresContext* aPresContext);
PRInt32 CalcDifference(const StyleDisplayImpl& aOther) const;
};
void StyleDisplayImpl::ResetFrom(const nsStyleDisplay* aParent, nsIPresContext* aPresContext)
{
if (nsnull != aParent) {
mDirection = aParent->mDirection;
mVisible = aParent->mVisible;
}
else {
mDirection = NS_STYLE_DIRECTION_LTR;
mVisible = NS_STYLE_VISIBILITY_VISIBLE;
}
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);
}
PRInt32 StyleDisplayImpl::CalcDifference(const StyleDisplayImpl& aOther) const
{
if ((mDisplay == aOther.mDisplay) &&
(mFloats == aOther.mFloats) &&
(mOverflow == aOther.mOverflow)) {
if ((mDirection == aOther.mDirection) &&
(mBreakType == aOther.mBreakType) &&
(mBreakBefore == aOther.mBreakBefore) &&
(mBreakAfter == aOther.mBreakAfter)) {
if ((mVisible == aOther.mVisible) &&
(mClipFlags == aOther.mClipFlags) &&
(mClip == aOther.mClip)) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_FRAMECHANGE;
}
// --------------------
// nsStyleTable
//
nsStyleTable::nsStyleTable(void) { }
struct StyleTableImpl: public nsStyleTable {
StyleTableImpl(void);
void ResetFrom(const nsStyleTable* aParent, nsIPresContext* aPresContext);
PRInt32 CalcDifference(const StyleTableImpl& aOther) const;
};
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();
mSpan = 1;
if (aParent) { // handle inherited properties
mBorderCollapse = aParent->mBorderCollapse;
mEmptyCells = aParent->mEmptyCells;
mCaptionSide = aParent->mCaptionSide;
mBorderSpacingX = aParent->mBorderSpacingX;
mBorderSpacingY = aParent->mBorderSpacingY;
mSpanWidth = aParent->mSpanWidth;
}
else {
mBorderCollapse = NS_STYLE_BORDER_SEPARATE;
mEmptyCells = NS_STYLE_TABLE_EMPTY_CELLS_HIDE;
mCaptionSide = NS_SIDE_TOP;
mBorderSpacingX.Reset();
mBorderSpacingY.Reset();
mSpanWidth.Reset();
}
}
PRInt32 StyleTableImpl::CalcDifference(const StyleTableImpl& aOther) const
{
if ((mLayoutStrategy == aOther.mLayoutStrategy) &&
(mFrame == aOther.mFrame) &&
(mRules == aOther.mRules) &&
(mBorderCollapse == aOther.mBorderCollapse) &&
(mBorderSpacingX == aOther.mBorderSpacingX) &&
(mBorderSpacingY == aOther.mBorderSpacingY) &&
(mCellPadding == aOther.mCellPadding) &&
(mCaptionSide == aOther.mCaptionSide) &&
(mCols == aOther.mCols) &&
(mSpan == aOther.mSpan) &&
(mSpanWidth == aOther.mSpanWidth)) {
if (mEmptyCells == aOther.mEmptyCells) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
//-----------------------
// nsStyleContent
//
nsStyleContent::nsStyleContent(void)
: mMarkerOffset(),
mContentCount(0),
mContents(nsnull),
mIncrementCount(0),
mIncrements(nsnull),
mResetCount(0),
mResets(nsnull),
mQuotesCount(0),
mQuotes(nsnull)
{
}
nsStyleContent::~nsStyleContent(void)
{
DELETE_ARRAY_IF(mContents);
DELETE_ARRAY_IF(mIncrements);
DELETE_ARRAY_IF(mResets);
DELETE_ARRAY_IF(mQuotes);
}
nsresult
nsStyleContent::GetContentAt(PRUint32 aIndex, nsStyleContentType& aType, nsString& aContent) const
{
if (aIndex < mContentCount) {
aType = mContents[aIndex].mType;
aContent = mContents[aIndex].mContent;
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
nsresult
nsStyleContent::AllocateContents(PRUint32 aCount)
{
if (aCount != mContentCount) {
DELETE_ARRAY_IF(mContents);
if (aCount) {
mContents = new nsStyleContentData[aCount];
if (! mContents) {
mContentCount = 0;
return NS_ERROR_OUT_OF_MEMORY;
}
}
mContentCount = aCount;
}
return NS_OK;
}
nsresult
nsStyleContent::SetContentAt(PRUint32 aIndex, nsStyleContentType aType, const nsString& aContent)
{
if (aIndex < mContentCount) {
mContents[aIndex].mType = aType;
if (aType < eStyleContentType_OpenQuote) {
mContents[aIndex].mContent = aContent;
}
else {
mContents[aIndex].mContent.Truncate();
}
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
nsresult
nsStyleContent::GetCounterIncrementAt(PRUint32 aIndex, nsString& aCounter, PRInt32& aIncrement) const
{
if (aIndex < mIncrementCount) {
aCounter = mIncrements[aIndex].mCounter;
aIncrement = mIncrements[aIndex].mValue;
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
nsresult
nsStyleContent::AllocateCounterIncrements(PRUint32 aCount)
{
if (aCount != mIncrementCount) {
DELETE_ARRAY_IF(mIncrements);
if (aCount) {
mIncrements = new nsStyleCounterData[aCount];
if (! mIncrements) {
mIncrementCount = 0;
return NS_ERROR_OUT_OF_MEMORY;
}
}
mIncrementCount = aCount;
}
return NS_OK;
}
nsresult
nsStyleContent::SetCounterIncrementAt(PRUint32 aIndex, const nsString& aCounter, PRInt32 aIncrement)
{
if (aIndex < mIncrementCount) {
mIncrements[aIndex].mCounter = aCounter;
mIncrements[aIndex].mValue = aIncrement;
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
nsresult
nsStyleContent::GetCounterResetAt(PRUint32 aIndex, nsString& aCounter, PRInt32& aValue) const
{
if (aIndex < mResetCount) {
aCounter = mResets[aIndex].mCounter;
aValue = mResets[aIndex].mValue;
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
nsresult
nsStyleContent::AllocateCounterResets(PRUint32 aCount)
{
if (aCount != mResetCount) {
DELETE_ARRAY_IF(mResets);
if (aCount) {
mResets = new nsStyleCounterData[aCount];
if (! mResets) {
mResetCount = 0;
return NS_ERROR_OUT_OF_MEMORY;
}
}
mResetCount = aCount;
}
return NS_OK;
}
nsresult
nsStyleContent::SetCounterResetAt(PRUint32 aIndex, const nsString& aCounter, PRInt32 aValue)
{
if (aIndex < mResetCount) {
mResets[aIndex].mCounter = aCounter;
mResets[aIndex].mValue = aValue;
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
nsresult
nsStyleContent::GetQuotesAt(PRUint32 aIndex, nsString& aOpen, nsString& aClose) const
{
if (aIndex < mQuotesCount) {
aIndex *= 2;
aOpen = mQuotes[aIndex];
aClose = mQuotes[++aIndex];
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
nsresult
nsStyleContent::AllocateQuotes(PRUint32 aCount)
{
if (aCount != mQuotesCount) {
DELETE_ARRAY_IF(mQuotes);
if (aCount) {
mQuotes = new nsString[aCount * 2];
if (! mQuotes) {
mQuotesCount = 0;
return NS_ERROR_OUT_OF_MEMORY;
}
}
mQuotesCount = aCount;
}
return NS_OK;
}
nsresult
nsStyleContent::SetQuotesAt(PRUint32 aIndex, const nsString& aOpen, const nsString& aClose)
{
if (aIndex < mQuotesCount) {
aIndex *= 2;
mQuotes[aIndex] = aOpen;
mQuotes[++aIndex] = aClose;
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
struct StyleContentImpl: public nsStyleContent {
StyleContentImpl(void) : nsStyleContent() { };
void ResetFrom(const StyleContentImpl* aParent, nsIPresContext* aPresContext);
PRInt32 CalcDifference(const StyleContentImpl& aOther) const;
};
void
StyleContentImpl::ResetFrom(const StyleContentImpl* aParent, nsIPresContext* aPresContext)
{
// reset data
mMarkerOffset.Reset();
mContentCount = 0;
DELETE_ARRAY_IF(mContents);
mIncrementCount = 0;
DELETE_ARRAY_IF(mIncrements);
mResetCount = 0;
DELETE_ARRAY_IF(mResets);
// inherited data
if (aParent) {
if (NS_SUCCEEDED(AllocateQuotes(aParent->mQuotesCount))) {
PRUint32 index = (mQuotesCount * 2);
while (0 < index--) {
mQuotes[index] = aParent->mQuotes[index];
}
}
}
else {
mQuotesCount = 0;
DELETE_ARRAY_IF(mQuotes);
}
}
PRInt32
StyleContentImpl::CalcDifference(const StyleContentImpl& aOther) const
{
if (mContentCount == aOther.mContentCount) {
if ((mMarkerOffset == aOther.mMarkerOffset) &&
(mIncrementCount == aOther.mIncrementCount) &&
(mResetCount == aOther.mResetCount) &&
(mQuotesCount == aOther.mQuotesCount)) {
PRUint32 index = mContentCount;
while (0 < index--) {
if ((mContents[index].mType != aOther.mContents[index].mType) ||
(mContents[index].mContent != aOther.mContents[index].mContent)) {
return NS_STYLE_HINT_REFLOW;
}
}
index = mIncrementCount;
while (0 < index--) {
if ((mIncrements[index].mValue != aOther.mIncrements[index].mValue) ||
(mIncrements[index].mCounter != aOther.mIncrements[index].mCounter)) {
return NS_STYLE_HINT_REFLOW;
}
}
index = mResetCount;
while (0 < index--) {
if ((mResets[index].mValue != aOther.mResets[index].mValue) ||
(mResets[index].mCounter != aOther.mResets[index].mCounter)) {
return NS_STYLE_HINT_REFLOW;
}
}
index = (mQuotesCount * 2);
while (0 < index--) {
if (mQuotes[index] != aOther.mQuotes[index]) {
return NS_STYLE_HINT_REFLOW;
}
}
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_FRAMECHANGE;
}
//----------------------------------------------------------------------
class StyleContextImpl : public nsIStyleContext {
public:
StyleContextImpl(nsIStyleContext* aParent, nsIAtom* aPseudoTag,
nsISupportsArray* aRules,
nsIPresContext* aPresContext);
virtual ~StyleContextImpl();
NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
NS_DECL_ISUPPORTS
virtual nsIStyleContext* GetParent(void) const;
virtual nsISupportsArray* GetStyleRules(void) const;
virtual PRInt32 GetStyleRuleCount(void) const;
NS_IMETHOD GetPseudoType(nsIAtom*& aPseudoTag) const;
NS_IMETHOD FindChildWithRules(const nsIAtom* aPseudoTag, nsISupportsArray* aRules,
nsIStyleContext*& aResult);
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);
NS_IMETHOD CalcStyleDifference(nsIStyleContext* aOther, PRInt32& aHint) const;
virtual void List(FILE* out, PRInt32 aIndent);
protected:
void AppendChild(StyleContextImpl* aChild);
void RemoveChild(StyleContextImpl* aChild);
StyleContextImpl* mParent;
StyleContextImpl* mChild;
StyleContextImpl* mEmptyChild;
StyleContextImpl* mPrevSibling;
StyleContextImpl* mNextSibling;
nsIAtom* mPseudoTag;
PRUint32 mRuleHash;
nsISupportsArray* mRules;
PRInt32 mDataCode;
// the style data...
StyleFontImpl mFont;
StyleColorImpl mColor;
StyleSpacingImpl mSpacing;
StyleListImpl mList;
StylePositionImpl mPosition;
StyleTextImpl mText;
StyleDisplayImpl mDisplay;
StyleTableImpl* mTable;
StyleContentImpl* mContent;
#ifdef DEBUG_REFS
PRInt32 mInstance;
#endif
};
static PRInt32 gLastDataCode;
#ifdef DEBUG_REFS
static PRInt32 gInstanceCount;
static PRInt32 gInstrument = 6;
#endif
static PRBool HashStyleRule(nsISupports* aRule, void* aData)
{
*((PRUint32*)aData) ^= PRUint32(aRule);
return PR_TRUE;
}
StyleContextImpl::StyleContextImpl(nsIStyleContext* aParent,
nsIAtom* aPseudoTag,
nsISupportsArray* aRules,
nsIPresContext* aPresContext)
: mParent((StyleContextImpl*)aParent),
mChild(nsnull),
mEmptyChild(nsnull),
mPseudoTag(aPseudoTag),
mRules(aRules),
mDataCode(-1),
mFont(aPresContext->GetDefaultFontDeprecated(), aPresContext->GetDefaultFixedFontDeprecated()),
mColor(),
mSpacing(),
mList(),
mPosition(),
mText(),
mDisplay(),
mTable(nsnull),
mContent(nsnull)
{
NS_INIT_REFCNT();
NS_IF_ADDREF(mPseudoTag);
NS_IF_ADDREF(mRules);
mNextSibling = this;
mPrevSibling = this;
if (nsnull != mParent) {
NS_ADDREF(mParent);
mParent->AppendChild(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()
{
NS_ASSERTION((nsnull == mChild) && (nsnull == mEmptyChild), "destructing context with children");
if (mParent) {
mParent->RemoveChild(this);
NS_RELEASE(mParent);
}
NS_IF_RELEASE(mPseudoTag);
NS_IF_RELEASE(mRules);
if (mTable) {
delete mTable;
mTable = nsnull;
}
if (mContent) {
delete mContent;
mContent = nsnull;
}
#ifdef DEBUG_REFS
fprintf(stdout, "%d of %d - StyleContext\n", mInstance, gInstanceCount);
--gInstanceCount;
#endif
}
#ifdef LOG_ADDREF_RELEASE
extern "C" {
void __log_addref(void* p, int oldrc, int newrc);
void __log_release(void* p, int oldrc, int newrc);
}
NS_IMPL_QUERY_INTERFACE(StyleContextImpl, kIStyleContextIID)
nsrefcnt StyleContextImpl::AddRef(void)
{
NS_PRECONDITION(PRInt32(mRefCnt) >= 0, "illegal refcnt");
__log_addref((void*) this, mRefCnt, mRefCnt + 1);
return ++mRefCnt;
}
nsrefcnt StyleContextImpl::Release(void)
{
__log_release((void*) this, mRefCnt, mRefCnt - 1);
NS_PRECONDITION(0 != mRefCnt, "dup release");
if (--mRefCnt == 0) {
NS_DELETEXPCOM(this);
return 0;
}
return mRefCnt;
}
#else
#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
#endif
nsIStyleContext* StyleContextImpl::GetParent(void) const
{
NS_IF_ADDREF(mParent);
return mParent;
}
void StyleContextImpl::AppendChild(StyleContextImpl* aChild)
{
if (0 == aChild->GetStyleRuleCount()) {
if (nsnull == mEmptyChild) {
mEmptyChild = aChild;
}
else {
aChild->mNextSibling = mEmptyChild;
aChild->mPrevSibling = mEmptyChild->mPrevSibling;
mEmptyChild->mPrevSibling->mNextSibling = aChild;
mEmptyChild->mPrevSibling = aChild;
}
}
else {
if (nsnull == mChild) {
mChild = aChild;
}
else {
aChild->mNextSibling = mChild;
aChild->mPrevSibling = mChild->mPrevSibling;
mChild->mPrevSibling->mNextSibling = aChild;
mChild->mPrevSibling = aChild;
}
}
}
void StyleContextImpl::RemoveChild(StyleContextImpl* aChild)
{
NS_ASSERTION((nsnull != aChild) && (this == aChild->mParent), "bad argument");
if ((nsnull == aChild) || (this != aChild->mParent)) {
return;
}
if (0 == aChild->GetStyleRuleCount()) { // is empty
if (aChild->mPrevSibling != aChild) { // has siblings
if (mEmptyChild == aChild) {
mEmptyChild = mEmptyChild->mNextSibling;
}
}
else {
NS_ASSERTION(mEmptyChild == aChild, "bad sibling pointers");
mEmptyChild = nsnull;
}
}
else { // isn't empty
if (aChild->mPrevSibling != aChild) { // has siblings
if (mChild == aChild) {
mChild = mChild->mNextSibling;
}
}
else {
NS_ASSERTION(mChild == aChild, "bad sibling pointers");
if (mChild == aChild) {
mChild = nsnull;
}
}
}
aChild->mPrevSibling->mNextSibling = aChild->mNextSibling;
aChild->mNextSibling->mPrevSibling = aChild->mPrevSibling;
aChild->mNextSibling = aChild;
aChild->mPrevSibling = aChild;
}
nsISupportsArray* StyleContextImpl::GetStyleRules(void) const
{
NS_IF_ADDREF(mRules);
return mRules;
}
PRInt32 StyleContextImpl::GetStyleRuleCount(void) const
{
if (nsnull != mRules) {
PRUint32 cnt;
nsresult rv = mRules->Count(&cnt);
if (NS_FAILED(rv)) return 0; // XXX error?
return cnt;
}
return 0;
}
NS_IMETHODIMP
StyleContextImpl::GetPseudoType(nsIAtom*& aPseudoTag) const
{
aPseudoTag = mPseudoTag;
NS_IF_ADDREF(aPseudoTag);
return NS_OK;
}
NS_IMETHODIMP
StyleContextImpl::FindChildWithRules(const nsIAtom* aPseudoTag,
nsISupportsArray* aRules,
nsIStyleContext*& aResult)
{
aResult = nsnull;
if ((nsnull != mChild) || (nsnull != mEmptyChild)) {
StyleContextImpl* child;
PRInt32 ruleCount;
if (aRules) {
PRUint32 cnt;
nsresult rv = aRules->Count(&cnt);
if (NS_FAILED(rv)) return rv;
ruleCount = cnt;
}
else
ruleCount = 0;
if (0 == ruleCount) {
if (nsnull != mEmptyChild) {
child = mEmptyChild;
do {
if ((0 == child->mDataCode) && // only look at children with un-twiddled data
(aPseudoTag == child->mPseudoTag)) {
aResult = child;
break;
}
child = child->mNextSibling;
} while (child != mEmptyChild);
}
}
else if (nsnull != mChild) {
PRUint32 hash = 0;
aRules->EnumerateForwards(HashStyleRule, &hash);
child = mChild;
do {
PRUint32 cnt;
if ((0 == child->mDataCode) && // only look at children with un-twiddled data
(child->mRuleHash == hash) &&
(child->mPseudoTag == aPseudoTag) &&
(nsnull != child->mRules) &&
NS_SUCCEEDED(child->mRules->Count(&cnt)) &&
(PRInt32)cnt == ruleCount) {
if (child->mRules->Equals(aRules)) {
aResult = child;
break;
}
}
child = child->mNextSibling;
} while (child != mChild);
}
}
NS_IF_ADDREF(aResult);
return NS_OK;
}
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 (mPseudoTag != other->mPseudoTag) {
result = PR_FALSE;
}
else {
if ((nsnull != mRules) && (nsnull != other->mRules)) {
if (mRuleHash == other->mRuleHash) {
result = mRules->Equals(other->mRules);
}
else {
result = PR_FALSE;
}
}
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();
StyleContextImpl* parent = mParent;
while (parent) { // find first parent that has table data so we can inherit from it
if (parent->mTable) {
break;
}
parent = parent->mParent;
}
if (parent) {
mTable->ResetFrom(parent->mTable, nsnull);
}
else {
mTable->ResetFrom(nsnull, nsnull);
}
}
result = mTable;
break;
case eStyleStruct_Content: // lazy creation
if (nsnull == mContent) {
mContent = new StyleContentImpl();
StyleContextImpl* parent = mParent;
while (parent) { // find first parent that has content data so we can inherit from it
if (parent->mContent) {
break;
}
parent = parent->mParent;
}
if (parent) {
mContent->ResetFrom(parent->mContent, nsnull);
}
else {
mContent->ResetFrom(nsnull, nsnull);
}
}
result = mContent;
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();
StyleContextImpl* parent = mParent;
while (parent) { // find first parent that has table data so we can inherit from it
if (parent->mTable) {
break;
}
parent = parent->mParent;
}
if (parent) {
mTable->ResetFrom(parent->mTable, nsnull);
}
else {
mTable->ResetFrom(nsnull, nsnull);
}
}
result = mTable;
break;
case eStyleStruct_Content: // this one gets created lazily
if (nsnull == mContent) {
mContent = new StyleContentImpl();
StyleContextImpl* parent = mParent;
while (parent) { // find first parent that has table data so we can inherit from it
if (parent->mContent) {
break;
}
parent = parent->mParent;
}
if (parent) {
mContent->ResetFrom(parent->mContent, nsnull);
}
else {
mContent->ResetFrom(nsnull, nsnull);
}
}
result = mContent;
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;
};
static PRBool MapStyleRuleFont(nsISupports* aRule, void* aData)
{
nsIStyleRule* rule = (nsIStyleRule*)aRule;
MapStyleData* data = (MapStyleData*)aData;
rule->MapFontStyleInto(data->mStyleContext, data->mPresContext);
return PR_TRUE;
}
static 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);
}
PRUint32 cnt = 0;
if (mRules) {
nsresult rv = mRules->Count(&cnt);
NS_ASSERTION(NS_SUCCEEDED(rv), "Count failed");
}
if (0 < cnt) {
MapStyleData data(this, aPresContext);
mRules->EnumerateForwards(MapStyleRuleFont, &data);
mRules->EnumerateForwards(MapStyleRule, &data);
}
if (-1 == mDataCode) {
mDataCode = 0;
}
nsCompatibility quirkMode = eCompatibility_Standard;
aPresContext->GetCompatibilityMode(&quirkMode);
if (eCompatibility_NavQuirks == quirkMode) {
if ((mDisplay.mDisplay == NS_STYLE_DISPLAY_TABLE) ||
(mDisplay.mDisplay == NS_STYLE_DISPLAY_TABLE_CAPTION)) {
StyleContextImpl* holdParent = mParent;
mParent = nsnull; // cut off all inheritance. this really blows
// XXX the one piece of style we do preserve is visibility
PRUint8 visible = mDisplay.mVisible;
// 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
if (mDisplay.mDisplay != NS_STYLE_DISPLAY_TABLE) {
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);
mDisplay.mVisible = visible;
PRUint32 cnt = 0;
if (mRules) {
nsresult rv = mRules->Count(&cnt);
NS_ASSERTION(NS_SUCCEEDED(rv), "Count failed");
}
if (0 < cnt) {
MapStyleData data(this, aPresContext);
mRules->EnumerateForwards(MapStyleRuleFont, &data);
mRules->EnumerateForwards(MapStyleRule, &data);
}
// reset all font data for tables again
if (mDisplay.mDisplay == NS_STYLE_DISPLAY_TABLE) {
mFont.ResetFrom(nsnull, aPresContext);
}
mParent = holdParent;
}
}
RecalcAutomaticData(aPresContext);
if (nsnull != mChild) {
StyleContextImpl* child = mChild;
do {
child->RemapStyle(aPresContext);
child = child->mNextSibling;
} while (mChild != child);
}
if (nsnull != mEmptyChild) {
StyleContextImpl* child = mEmptyChild;
do {
child->RemapStyle(aPresContext);
child = child->mNextSibling;
} while (mEmptyChild != child);
}
return NS_OK;
}
void StyleContextImpl::ForceUnique(void)
{
if (mDataCode <= 0) {
mDataCode = ++gLastDataCode;
}
}
void StyleContextImpl::RecalcAutomaticData(nsIPresContext* aPresContext)
{
mSpacing.RecalcData(aPresContext, mColor.mColor);
}
NS_IMETHODIMP
StyleContextImpl::CalcStyleDifference(nsIStyleContext* aOther, PRInt32& aHint) const
{
if (aOther) {
PRInt32 hint;
const StyleContextImpl* other = (const StyleContextImpl*)aOther;
aHint = mFont.CalcDifference(other->mFont);
if (aHint < NS_STYLE_HINT_MAX) {
hint = mColor.CalcDifference(other->mColor);
if (aHint < hint) {
aHint = hint;
}
}
if (aHint < NS_STYLE_HINT_MAX) {
hint = mSpacing.CalcDifference(other->mSpacing);
if (aHint < hint) {
aHint = hint;
}
}
if (aHint < NS_STYLE_HINT_MAX) {
hint = mList.CalcDifference(other->mList);
if (aHint < hint) {
aHint = hint;
}
}
if (aHint < NS_STYLE_HINT_MAX) {
hint = mPosition.CalcDifference(other->mPosition);
if (aHint < hint) {
aHint = hint;
}
}
if (aHint < NS_STYLE_HINT_MAX) {
hint = mText.CalcDifference(other->mText);
if (aHint < hint) {
aHint = hint;
}
}
if (aHint < NS_STYLE_HINT_MAX) {
hint = mDisplay.CalcDifference(other->mDisplay);
if (aHint < hint) {
aHint = hint;
}
}
if (aHint < NS_STYLE_HINT_MAX) {
if (mTable) {
if (other->mTable) {
hint = mTable->CalcDifference(*(other->mTable));
}
else {
hint = NS_STYLE_HINT_REFLOW;
}
}
else {
if (other->mTable) {
hint = NS_STYLE_HINT_REFLOW;
}
else {
hint = NS_STYLE_HINT_NONE;
}
}
if (aHint < hint) {
aHint = hint;
}
}
if (aHint < NS_STYLE_HINT_MAX) {
if (mContent) {
if (other->mContent) {
hint = mContent->CalcDifference(*(other->mContent));
}
else {
if (mContent->ContentCount()) {
hint = NS_STYLE_HINT_FRAMECHANGE;
}
else {
hint = NS_STYLE_HINT_REFLOW;
}
}
}
else {
if (other->mContent) {
if (other->mContent->ContentCount()) {
hint = NS_STYLE_HINT_FRAMECHANGE;
}
else {
hint = NS_STYLE_HINT_REFLOW;
}
}
else {
hint = NS_STYLE_HINT_NONE;
}
}
if (aHint < hint) {
aHint = hint;
}
}
}
return NS_OK;
}
void StyleContextImpl::List(FILE* out, PRInt32 aIndent)
{
// Indent
PRInt32 index;
for (index = aIndent; --index >= 0; ) fputs(" ", out);
fprintf(out, "%p(%d) ", this, mRefCnt);
if (nsnull != mPseudoTag) {
nsAutoString buffer;
mPseudoTag->ToString(buffer);
fputs(buffer, out);
fputs(" ", out);
}
PRInt32 count = GetStyleRuleCount();
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) {
StyleContextImpl* child = mEmptyChild;
do {
child->List(out, aIndent + 1);
child = child->mNextSibling;
} while (mEmptyChild != child);
}
}
NS_LAYOUT nsresult
NS_NewStyleContext(nsIStyleContext** aInstancePtrResult,
nsIStyleContext* aParentContext,
nsIAtom* aPseudoTag,
nsISupportsArray* aRules,
nsIPresContext* aPresContext)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
StyleContextImpl* context = new StyleContextImpl(aParentContext, aPseudoTag,
aRules, aPresContext);
if (nsnull == context) {
return NS_ERROR_OUT_OF_MEMORY;
}
return context->QueryInterface(kIStyleContextIID, (void **) aInstancePtrResult);
}
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