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pjs/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 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
* IBM Corporation
*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 2000
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 03/20/2000 IBM Corp. Bidi - ability to change the default direction of the browser
*
*/
#include "nsIStyleContext.h"
#include "nsIMutableStyleContext.h"
#include "nsStyleConsts.h"
#include "nsString.h"
#include "nsUnitConversion.h"
#include "nsIPresContext.h"
#include "nsIStyleRule.h"
#include "nsISupportsArray.h"
#include "nsCRT.h"
#include "nsCOMPtr.h"
#include "nsIStyleSet.h"
#include "nsISizeOfHandler.h"
#include "nsIPresShell.h"
#include "nsLayoutAtoms.h"
#include "prenv.h"
#ifdef IBMBIDI
#include "nsIUBidiUtils.h"
#endif
#ifdef DEBUG
//#define NOISY_DEBUG
#endif
#ifdef USE_FAST_CACHE
// define COMPUTE_STYLEDATA_CRC to actually compute a valid CRC32
// - Fast cache uses a CRC32 on the style context to quickly find sharing candidates.
// Enabling it by defining USE_FAST_CACHE makes style sharing significantly faster.
#define COMPUTE_STYLEDATA_CRC
#endif
//------------------------------------------------------------------------------
// Helper functions
//------------------------------------------------------------------------------
//
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;
}
#ifdef COMPUTE_STYLEDATA_CRC
static void gen_crc_table();
static PRUint32 AccumulateCRC(PRUint32 crc_accum, const char *data_blk_ptr, int data_blk_size);
static PRUint32 StyleSideCRC(PRUint32 crc,const nsStyleSides *aStyleSides);
static PRUint32 StyleCoordCRC(PRUint32 crc, const nsStyleCoord* aCoord);
static PRUint32 StyleMarginCRC(PRUint32 crc, const nsMargin *aMargin);
static PRUint32 StyleStringCRC(PRUint32 aCrc, const nsString *aString);
#define STYLEDATA_NO_CRC (0)
#define STYLEDATA_DEFAULT_CRC (0xcafebabe)
#endif
#ifdef XP_MAC
#pragma mark -
#endif
struct StyleBlob {
virtual ~StyleBlob(void) {}
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext) = 0;
virtual void CopyTo(nsStyleStruct* aDest) const = 0;
virtual void SetFrom(const nsStyleStruct* aSource) = 0;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const = 0;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const = 0;
inline virtual const nsStyleStruct* GetData(void) const = 0;
};
//------------------------------------------------------------------------------
// nsStyleFont
//------------------------------------------------------------------------------
//
struct StyleFontBlob : public nsStyleFont, public StyleBlob {
StyleFontBlob(const nsFont& aVariableFont, const nsFont& aFixedFont)
: nsStyleFont(aVariableFont, aFixedFont)
{ MOZ_COUNT_CTOR(StyleFontBlob); }
StyleFontBlob(void) { MOZ_COUNT_CTOR(StyleFontBlob); }
virtual ~StyleFontBlob(void) { MOZ_COUNT_DTOR(StyleFontBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleFont*)this;};
static PRInt32 CalcFontDifference(const nsFont& aFont1, const nsFont& aFont2);
private: // These are not allowed
StyleFontBlob(const StyleFontBlob& aOther);
StyleFontBlob& operator=(const StyleFontBlob& aOther);
};
void StyleFontBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
const nsStyleFont* parent = (nsStyleFont*)aParent;
if (nsnull != parent) {
mFont = parent->mFont;
mFixedFont = parent->mFixedFont;
mFlags = parent->mFlags;
}
else {
aPresContext->GetDefaultFont(mFont);
aPresContext->GetDefaultFixedFont(mFixedFont);
mFlags = NS_STYLE_FONT_DEFAULT;
}
}
void StyleFontBlob::SetFrom(const nsStyleStruct* aSource)
{
const nsStyleFont* source = (nsStyleFont*)aSource;
mFont = source->mFont;
mFixedFont = source->mFixedFont;
mFlags = source->mFlags;
}
void StyleFontBlob::CopyTo(nsStyleStruct* aDest) const
{
nsStyleFont* dest = (nsStyleFont*)aDest;
dest->mFont = mFont;
dest->mFixedFont = mFixedFont;
dest->mFlags = mFlags;
}
PRInt32 StyleFontBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleFont* other = (nsStyleFont*)aOther;
if (mFlags == other->mFlags) {
PRInt32 impact = CalcFontDifference(mFont, other->mFont);
if (impact < NS_STYLE_HINT_REFLOW) {
impact = CalcFontDifference(mFixedFont, other->mFixedFont);
}
return impact;
}
return NS_STYLE_HINT_REFLOW;
}
PRInt32 StyleFontBlob::CalcFontDifference(const nsFont& aFont1, const nsFont& aFont2)
{
if ((aFont1.size == aFont2.size) &&
(aFont1.style == aFont2.style) &&
(aFont1.variant == aFont2.variant) &&
(aFont1.weight == aFont2.weight) &&
(aFont1.name == aFont2.name)) {
if ((aFont1.decorations == aFont2.decorations)) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
PRUint32 StyleFontBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = AccumulateCRC(crc,(const char *)&(mFont.size),sizeof(mFont.size));
crc = AccumulateCRC(crc,(const char *)&(mFont.style),sizeof(mFont.style));
crc = AccumulateCRC(crc,(const char *)&(mFont.variant),sizeof(mFont.variant));
crc = AccumulateCRC(crc,(const char *)&(mFont.weight),sizeof(mFont.weight));
crc = AccumulateCRC(crc,(const char *)&(mFont.decorations),sizeof(mFont.decorations));
crc = StyleStringCRC(crc,&(mFont.name));
crc = AccumulateCRC(crc,(const char *)&(mFixedFont.size),sizeof(mFixedFont.size));
crc = AccumulateCRC(crc,(const char *)&(mFixedFont.style),sizeof(mFixedFont.style));
crc = AccumulateCRC(crc,(const char *)&(mFixedFont.variant),sizeof(mFixedFont.variant));
crc = AccumulateCRC(crc,(const char *)&(mFixedFont.weight),sizeof(mFixedFont.weight));
crc = AccumulateCRC(crc,(const char *)&(mFixedFont.decorations),sizeof(mFixedFont.decorations));
crc = StyleStringCRC(crc,&(mFixedFont.name));
crc = AccumulateCRC(crc,(const char *)&mFlags,sizeof(mFlags));
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleColor
//------------------------------------------------------------------------------
//
struct StyleColorBlob: public nsStyleColor, public StyleBlob {
StyleColorBlob(void) { MOZ_COUNT_CTOR(StyleColorBlob); }
virtual ~StyleColorBlob(void) { MOZ_COUNT_DTOR(StyleColorBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleColor*)this;};
private: // These are not allowed
StyleColorBlob(const StyleColorBlob& aOther);
StyleColorBlob& operator=(const StyleColorBlob& aOther);
};
void StyleColorBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
const nsStyleColor* parent = (nsStyleColor*)aParent;
if (nsnull != parent) {
mColor = parent->mColor;
mOpacity = parent->mOpacity;
mCursor = parent->mCursor; // fix for bugzilla bug 51113
}
else {
if (nsnull != aPresContext) {
aPresContext->GetDefaultColor(&mColor);
}
else {
mColor = NS_RGB(0x00, 0x00, 0x00);
}
mOpacity = 1.0f;
mCursor = NS_STYLE_CURSOR_AUTO; // fix for bugzilla bug 51113
}
mBackgroundFlags = NS_STYLE_BG_COLOR_TRANSPARENT | NS_STYLE_BG_IMAGE_NONE;
if (nsnull != aPresContext) {
aPresContext->GetDefaultBackgroundColor(&mBackgroundColor);
aPresContext->GetDefaultBackgroundImageAttachment(&mBackgroundAttachment);
aPresContext->GetDefaultBackgroundImageRepeat(&mBackgroundRepeat);
aPresContext->GetDefaultBackgroundImageOffset(&mBackgroundXPosition, &mBackgroundYPosition);
aPresContext->GetDefaultBackgroundImage(mBackgroundImage);
}
else {
mBackgroundColor = NS_RGB(192,192,192);
mBackgroundAttachment = NS_STYLE_BG_ATTACHMENT_SCROLL;
mBackgroundRepeat = NS_STYLE_BG_REPEAT_XY;
mBackgroundXPosition = 0;
mBackgroundYPosition = 0;
}
}
void StyleColorBlob::SetFrom(const nsStyleStruct* aSource)
{
const nsStyleColor* source = (nsStyleColor*)aSource;
mColor = source->mColor;
mBackgroundAttachment = source->mBackgroundAttachment;
mBackgroundFlags = source->mBackgroundFlags;
mBackgroundRepeat = source->mBackgroundRepeat;
mBackgroundColor = source->mBackgroundColor;
mBackgroundXPosition = source->mBackgroundXPosition;
mBackgroundYPosition = source->mBackgroundYPosition;
mBackgroundImage = source->mBackgroundImage;
mCursor = source->mCursor;
mCursorImage = source->mCursorImage;
mOpacity = source->mOpacity;
}
void StyleColorBlob::CopyTo(nsStyleStruct* aDest) const
{
nsStyleColor* dest = (nsStyleColor*)aDest;
dest->mColor = mColor;
dest->mBackgroundAttachment = mBackgroundAttachment;
dest->mBackgroundFlags = mBackgroundFlags;
dest->mBackgroundRepeat = mBackgroundRepeat;
dest->mBackgroundColor = mBackgroundColor;
dest->mBackgroundXPosition = mBackgroundXPosition;
dest->mBackgroundYPosition = mBackgroundYPosition;
dest->mBackgroundImage = mBackgroundImage;
dest->mCursor = mCursor;
dest->mCursorImage = mCursorImage;
dest->mOpacity = mOpacity;
}
PRInt32 StyleColorBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleColor* other = (nsStyleColor*)aOther;
if ((mColor == other->mColor) &&
(mBackgroundAttachment == other->mBackgroundAttachment) &&
(mBackgroundFlags == other->mBackgroundFlags) &&
(mBackgroundRepeat == other->mBackgroundRepeat) &&
(mBackgroundColor == other->mBackgroundColor) &&
(mBackgroundXPosition == other->mBackgroundXPosition) &&
(mBackgroundYPosition == other->mBackgroundYPosition) &&
(mBackgroundImage == other->mBackgroundImage) &&
(mCursor == other->mCursor) &&
(mCursorImage == other->mCursorImage) &&
(mOpacity == other->mOpacity)) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_VISUAL;
}
PRUint32 StyleColorBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = AccumulateCRC(crc,(const char *)&mColor,sizeof(mColor));
crc = AccumulateCRC(crc,(const char *)&mBackgroundAttachment,sizeof(mBackgroundAttachment));
crc = AccumulateCRC(crc,(const char *)&mBackgroundFlags,sizeof(mBackgroundFlags));
crc = AccumulateCRC(crc,(const char *)&mBackgroundRepeat,sizeof(mBackgroundRepeat));
crc = AccumulateCRC(crc,(const char *)&mBackgroundColor,sizeof(mBackgroundColor));
crc = AccumulateCRC(crc,(const char *)&mBackgroundXPosition,sizeof(mBackgroundXPosition));
crc = AccumulateCRC(crc,(const char *)&mBackgroundYPosition,sizeof(mBackgroundYPosition));
crc = StyleStringCRC(crc,&mBackgroundImage);
crc = AccumulateCRC(crc,(const char *)&mCursor,sizeof(mCursor));
crc = StyleStringCRC(crc,&mCursorImage);
crc = AccumulateCRC(crc,(const char *)&mOpacity,sizeof(mOpacity));
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleMargin
//------------------------------------------------------------------------------
//
struct StyleMarginBlob: public nsStyleMargin, public StyleBlob {
StyleMarginBlob(void) { MOZ_COUNT_CTOR(StyleMarginBlob); }
virtual ~StyleMarginBlob(void) { MOZ_COUNT_DTOR(StyleMarginBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleMargin*)this;};
void RecalcData(void);
private: // These are not allowed
StyleMarginBlob(const StyleMarginBlob& aOther);
StyleMarginBlob& operator=(const StyleMarginBlob& aOther);
};
void StyleMarginBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
// spacing values not inherited
mMargin.Reset();
mHasCachedMargin = PR_FALSE;
}
void StyleMarginBlob::SetFrom(const nsStyleStruct* aSource)
{
nsCRT::memcpy((nsStyleMargin*)this, aSource, sizeof(nsStyleMargin));
}
void StyleMarginBlob::CopyTo(nsStyleStruct* aDest) const
{
nsCRT::memcpy(aDest, (const nsStyleMargin*)this, sizeof(nsStyleMargin));
}
void StyleMarginBlob::RecalcData(void)
{
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;
}
}
PRInt32 StyleMarginBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleMargin* other = (nsStyleMargin*)aOther;
if (mMargin == other->mMargin) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
PRUint32 StyleMarginBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = StyleSideCRC(crc,&mMargin);
crc = AccumulateCRC(crc,(const char *)&mHasCachedMargin,sizeof(mHasCachedMargin));
if (mHasCachedMargin) {
crc = StyleMarginCRC(crc,&mCachedMargin);
}
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStylePadding
//------------------------------------------------------------------------------
//
struct StylePaddingBlob: public nsStylePadding, public StyleBlob {
StylePaddingBlob(void) { MOZ_COUNT_CTOR(StylePaddingBlob); }
virtual ~StylePaddingBlob(void) { MOZ_COUNT_DTOR(StylePaddingBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStylePadding*)this;};
void RecalcData(void);
private: // These are not allowed
StylePaddingBlob(const StylePaddingBlob& aOther);
StylePaddingBlob& operator=(const StylePaddingBlob& aOther);
};
void StylePaddingBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
// spacing values not inherited
mPadding.Reset();
mHasCachedPadding = PR_FALSE;
}
void StylePaddingBlob::SetFrom(const nsStyleStruct* aSource)
{
nsCRT::memcpy((nsStylePadding*)this, aSource, sizeof(nsStylePadding));
}
void StylePaddingBlob::CopyTo(nsStyleStruct* aDest) const
{
nsCRT::memcpy(aDest, (const nsStylePadding*)this, sizeof(nsStylePadding));
}
void StylePaddingBlob::RecalcData(void)
{
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;
}
}
PRInt32 StylePaddingBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStylePadding* other = (nsStylePadding*)aOther;
if (mPadding == other->mPadding) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
PRUint32 StylePaddingBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = StyleSideCRC(crc,&mPadding);
crc = AccumulateCRC(crc,(const char *)&mHasCachedPadding,sizeof(mHasCachedPadding));
if (mHasCachedPadding) {
crc = StyleMarginCRC(crc,&mCachedPadding);
}
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleBorder
//------------------------------------------------------------------------------
//
struct StyleBorderBlob: public nsStyleBorder, public StyleBlob {
StyleBorderBlob(void)
: mWidthsInitialized(PR_FALSE)
{ MOZ_COUNT_CTOR(StyleBorderBlob); }
virtual ~StyleBorderBlob(void) { MOZ_COUNT_DTOR(StyleBorderBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleBorder*)this;};
PRBool IsBorderSideVisible(PRUint8 aSide) const;
void RecalcData(nscolor color);
private: // These are not allowed
StyleBorderBlob(const StyleBorderBlob& aOther);
StyleBorderBlob& operator=(const StyleBorderBlob& aOther);
// XXX remove with deprecated methods
PRBool mWidthsInitialized;
};
void StyleBorderBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
// XXX support mBorderWidhts until deprecated methods are removed
if (! mWidthsInitialized) {
float pixelsToTwips = 20.0f;
if (aPresContext) {
aPresContext->GetPixelsToTwips(&pixelsToTwips);
}
mBorderWidths[NS_STYLE_BORDER_WIDTH_THIN] = NSIntPixelsToTwips(1, pixelsToTwips);
mBorderWidths[NS_STYLE_BORDER_WIDTH_MEDIUM] = NSIntPixelsToTwips(3, pixelsToTwips);
mBorderWidths[NS_STYLE_BORDER_WIDTH_THICK] = NSIntPixelsToTwips(5, pixelsToTwips);
mWidthsInitialized = PR_TRUE;
}
// spacing values not inherited
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.Reset();
mFloatEdge = NS_STYLE_FLOAT_EDGE_CONTENT;
mHasCachedBorder = PR_FALSE;
}
void StyleBorderBlob::SetFrom(const nsStyleStruct* aSource)
{
nsCRT::memcpy((nsStyleBorder*)this, aSource, sizeof(nsStyleBorder));
}
void StyleBorderBlob::CopyTo(nsStyleStruct* aDest) const
{
nsCRT::memcpy(aDest, (const nsStyleBorder*)this, sizeof(nsStyleBorder));
}
PRBool StyleBorderBlob::IsBorderSideVisible(PRUint8 aSide) const
{
PRUint8 borderStyle = GetBorderStyle(aSide);
return ((borderStyle != NS_STYLE_BORDER_STYLE_NONE)
&& (borderStyle != NS_STYLE_BORDER_STYLE_HIDDEN));
}
void StyleBorderBlob::RecalcData(nscolor aColor)
{
if (((!IsBorderSideVisible(NS_SIDE_LEFT))||
IsFixedUnit(mBorder.GetLeftUnit(), PR_TRUE)) &&
((!IsBorderSideVisible(NS_SIDE_TOP)) ||
IsFixedUnit(mBorder.GetTopUnit(), PR_TRUE)) &&
((!IsBorderSideVisible(NS_SIDE_RIGHT)) ||
IsFixedUnit(mBorder.GetRightUnit(), PR_TRUE)) &&
((!IsBorderSideVisible(NS_SIDE_BOTTOM)) ||
IsFixedUnit(mBorder.GetBottomUnit(), PR_TRUE))) {
nsStyleCoord coord;
if (!IsBorderSideVisible(NS_SIDE_LEFT)) {
mCachedBorder.left = 0;
}
else {
mCachedBorder.left = CalcCoord(mBorder.GetLeft(coord), mBorderWidths, 3);
}
if (!IsBorderSideVisible(NS_SIDE_TOP)) {
mCachedBorder.top = 0;
}
else {
mCachedBorder.top = CalcCoord(mBorder.GetTop(coord), mBorderWidths, 3);
}
if (!IsBorderSideVisible(NS_SIDE_RIGHT)) {
mCachedBorder.right = 0;
}
else {
mCachedBorder.right = CalcCoord(mBorder.GetRight(coord), mBorderWidths, 3);
}
if (!IsBorderSideVisible(NS_SIDE_BOTTOM)) {
mCachedBorder.bottom = 0;
}
else {
mCachedBorder.bottom = CalcCoord(mBorder.GetBottom(coord), mBorderWidths, 3);
}
mHasCachedBorder = PR_TRUE;
}
else {
mHasCachedBorder = PR_FALSE;
}
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;
}
}
PRInt32 StyleBorderBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleBorder* other = (nsStyleBorder*)aOther;
if ((mBorder == other->mBorder) &&
(mFloatEdge == other->mFloatEdge)) {
PRInt32 ix;
for (ix = 0; ix < 4; ix++) {
if ((mBorderStyle[ix] != other->mBorderStyle[ix]) ||
(mBorderColor[ix] != other->mBorderColor[ix])) {
if ((mBorderStyle[ix] != other->mBorderStyle[ix]) &&
((NS_STYLE_BORDER_STYLE_NONE == mBorderStyle[ix]) ||
(NS_STYLE_BORDER_STYLE_NONE == other->mBorderStyle[ix]) ||
(NS_STYLE_BORDER_STYLE_HIDDEN == mBorderStyle[ix]) || // bug 45754
(NS_STYLE_BORDER_STYLE_HIDDEN == other->mBorderStyle[ix]))) {
return NS_STYLE_HINT_REFLOW; // border on or off
}
return NS_STYLE_HINT_VISUAL;
}
}
if (mBorderRadius != other->mBorderRadius) {
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
PRUint32 StyleBorderBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = StyleSideCRC(crc,&mBorder);
crc = StyleSideCRC(crc,&mBorderRadius);
crc = AccumulateCRC(crc,(const char *)&mFloatEdge,sizeof(mFloatEdge));
crc = AccumulateCRC(crc,(const char *)&mHasCachedBorder,sizeof(mHasCachedBorder));
if (mHasCachedBorder) {
crc = StyleMarginCRC(crc,&mCachedBorder);
}
crc = AccumulateCRC(crc,(const char *)mBorderStyle,sizeof(mBorderStyle)); // array of 4 elements
crc = AccumulateCRC(crc,(const char *)mBorderColor,sizeof(mBorderColor)); // array ...
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleOutline
//------------------------------------------------------------------------------
//
struct StyleOutlineBlob: public nsStyleOutline, public StyleBlob {
StyleOutlineBlob(void)
: mWidthsInitialized(PR_FALSE)
{ MOZ_COUNT_CTOR(StyleOutlineBlob); }
virtual ~StyleOutlineBlob(void) { MOZ_COUNT_DTOR(StyleOutlineBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleOutline*)this;};
void RecalcData(void);
private: // These are not allowed
StyleOutlineBlob(const StyleOutlineBlob& aOther);
StyleOutlineBlob& operator=(const StyleOutlineBlob& aOther);
// XXX remove with deprecated methods
PRBool mWidthsInitialized;
};
void StyleOutlineBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
// XXX support mBorderWidhts until deprecated methods are removed
if (! mWidthsInitialized) {
float pixelsToTwips = 20.0f;
if (aPresContext) {
aPresContext->GetPixelsToTwips(&pixelsToTwips);
}
mBorderWidths[NS_STYLE_BORDER_WIDTH_THIN] = NSIntPixelsToTwips(1, pixelsToTwips);
mBorderWidths[NS_STYLE_BORDER_WIDTH_MEDIUM] = NSIntPixelsToTwips(3, pixelsToTwips);
mBorderWidths[NS_STYLE_BORDER_WIDTH_THICK] = NSIntPixelsToTwips(5, pixelsToTwips);
mWidthsInitialized = PR_TRUE;
}
// spacing values not inherited
mOutlineRadius.Reset();
nsStyleCoord medium(NS_STYLE_BORDER_WIDTH_MEDIUM, eStyleUnit_Enumerated);
mOutlineWidth = medium;
mOutlineStyle = NS_STYLE_BORDER_STYLE_NONE;
mOutlineColor = NS_RGB(0, 0, 0);
mHasCachedOutline = PR_FALSE;
}
void StyleOutlineBlob::SetFrom(const nsStyleStruct* aSource)
{
nsCRT::memcpy((nsStyleOutline*)this, aSource, sizeof(nsStyleOutline));
}
void StyleOutlineBlob::CopyTo(nsStyleStruct* aDest) const
{
nsCRT::memcpy(aDest, (const nsStyleOutline*)this, sizeof(nsStyleOutline));
}
void StyleOutlineBlob::RecalcData(void)
{
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, mBorderWidths, 3);
}
mHasCachedOutline = PR_TRUE;
}
else {
mHasCachedOutline = PR_FALSE;
}
}
PRInt32 StyleOutlineBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleOutline* other = (nsStyleOutline*)aOther;
if ((mOutlineWidth != other->mOutlineWidth) ||
(mOutlineStyle != other->mOutlineStyle) ||
(mOutlineColor != other->mOutlineColor) ||
(mOutlineRadius != other->mOutlineRadius)) {
return NS_STYLE_HINT_VISUAL; // XXX: should be VISUAL: see bugs 9809 and 9816
}
return NS_STYLE_HINT_NONE;
}
PRUint32 StyleOutlineBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = StyleSideCRC(crc,&mOutlineRadius);
crc = StyleCoordCRC(crc,&mOutlineWidth);
crc = AccumulateCRC(crc,(const char *)&mHasCachedOutline,sizeof(mHasCachedOutline));
if (mHasCachedOutline) {
crc = AccumulateCRC(crc,(const char *)&mCachedOutlineWidth,sizeof(mCachedOutlineWidth));
}
crc = AccumulateCRC(crc,(const char *)&mOutlineStyle,sizeof(mOutlineStyle));
crc = AccumulateCRC(crc,(const char *)&mOutlineColor,sizeof(mOutlineColor));
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleList
//------------------------------------------------------------------------------
//
struct StyleListBlob: public nsStyleList, public StyleBlob {
StyleListBlob(void) { MOZ_COUNT_CTOR(StyleListBlob); }
virtual ~StyleListBlob(void) { MOZ_COUNT_DTOR(StyleListBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleList*)this;};
private: // These are not allowed
StyleListBlob(const StyleListBlob& aOther);
StyleListBlob& operator=(const StyleListBlob& aOther);
};
void StyleListBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
const nsStyleList* parent = (nsStyleList*)aParent;
if (nsnull != parent) {
mListStyleType = parent->mListStyleType;
mListStyleImage = parent->mListStyleImage;
mListStylePosition = parent->mListStylePosition;
}
else {
mListStyleType = NS_STYLE_LIST_STYLE_BASIC;
mListStylePosition = NS_STYLE_LIST_STYLE_POSITION_OUTSIDE;
mListStyleImage.Truncate();
}
}
void StyleListBlob::SetFrom(const nsStyleStruct* aSource)
{
const nsStyleList* source = (nsStyleList*)aSource;
mListStyleType = source->mListStyleType;
mListStylePosition = source->mListStylePosition;
mListStyleImage = source->mListStyleImage;
}
void StyleListBlob::CopyTo(nsStyleStruct* aDest) const
{
nsStyleList* dest = (nsStyleList*)aDest;
dest->mListStyleType = mListStyleType;
dest->mListStylePosition = mListStylePosition;
dest->mListStyleImage = mListStyleImage;
}
PRInt32 StyleListBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleList* other = (nsStyleList*)aOther;
if (mListStylePosition == other->mListStylePosition) {
if (mListStyleImage == other->mListStyleImage) {
if (mListStyleType == other->mListStyleType) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_REFLOW;
}
PRUint32 StyleListBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = AccumulateCRC(crc,(const char *)&mListStyleType,sizeof(mListStyleType));
crc = AccumulateCRC(crc,(const char *)&mListStylePosition,sizeof(mListStylePosition));
crc = StyleStringCRC(crc,&mListStyleImage);
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStylePosition
//------------------------------------------------------------------------------
//
struct StylePositionBlob: public nsStylePosition, public StyleBlob {
StylePositionBlob(void) { MOZ_COUNT_CTOR(StylePositionBlob); }
virtual ~StylePositionBlob(void) { MOZ_COUNT_DTOR(StylePositionBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStylePosition*)this;};
private: // These are not allowed
StylePositionBlob(const StylePositionBlob& aOther);
StylePositionBlob& operator=(const StylePositionBlob& aOther);
};
void StylePositionBlob::ResetFrom(const nsStyleStruct* 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();
mBoxSizing = NS_STYLE_BOX_SIZING_CONTENT;
mZIndex.SetAutoValue();
}
void StylePositionBlob::SetFrom(const nsStyleStruct* aSource)
{
nsCRT::memcpy((nsStylePosition*)this, aSource, sizeof(nsStylePosition));
}
void StylePositionBlob::CopyTo(nsStyleStruct* aDest) const
{
nsCRT::memcpy(aDest, (const nsStylePosition*)this, sizeof(nsStylePosition));
}
PRInt32 StylePositionBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStylePosition* other = (nsStylePosition*)aOther;
if (mPosition == other->mPosition) {
if ((mOffset == other->mOffset) &&
(mWidth == other->mWidth) &&
(mMinWidth == other->mMinWidth) &&
(mMaxWidth == other->mMaxWidth) &&
(mHeight == other->mHeight) &&
(mMinHeight == other->mMinHeight) &&
(mMaxHeight == other->mMaxHeight) &&
(mBoxSizing == other->mBoxSizing) &&
(mZIndex == other->mZIndex)) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_FRAMECHANGE;
}
PRUint32 StylePositionBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = AccumulateCRC(crc,(const char *)&mPosition,sizeof(mPosition));
crc = StyleSideCRC(crc,&mOffset);
crc = StyleCoordCRC(crc,&mWidth);
crc = StyleCoordCRC(crc,&mMinWidth);
crc = StyleCoordCRC(crc,&mMaxWidth);
crc = StyleCoordCRC(crc,&mHeight);
crc = StyleCoordCRC(crc,&mMinHeight);
crc = StyleCoordCRC(crc,&mMaxHeight);
crc = AccumulateCRC(crc,(const char *)&mBoxSizing,sizeof(mBoxSizing));
crc = AccumulateCRC(crc,(const char *)&mZIndex,sizeof(mZIndex));
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleText
//------------------------------------------------------------------------------
//
struct StyleTextBlob: public nsStyleText, public StyleBlob {
StyleTextBlob(void) { MOZ_COUNT_CTOR(StyleTextBlob); }
virtual ~StyleTextBlob(void) { MOZ_COUNT_DTOR(StyleTextBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleText*)this;};
private: // These are not allowed
StyleTextBlob(const StyleTextBlob& aOther);
StyleTextBlob& operator=(const StyleTextBlob& aOther);
};
void StyleTextBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
const nsStyleText* parent = (nsStyleText*)aParent;
// These properties not inherited
mTextDecoration = NS_STYLE_TEXT_DECORATION_NONE;
mVerticalAlign.SetIntValue(NS_STYLE_VERTICAL_ALIGN_BASELINE, eStyleUnit_Enumerated);
// mVerticalAlign.Reset(); TBI
if (nsnull != parent) {
mTextAlign = parent->mTextAlign;
mTextTransform = parent->mTextTransform;
mWhiteSpace = parent->mWhiteSpace;
mLetterSpacing = parent->mLetterSpacing;
// Inherit everything except percentage line-height values
nsStyleUnit unit = parent->mLineHeight.GetUnit();
if ((eStyleUnit_Normal == unit) || (eStyleUnit_Factor == unit) ||
(eStyleUnit_Coord == unit)) {
mLineHeight = parent->mLineHeight;
}
else {
mLineHeight.SetInheritValue();
}
mTextIndent = parent->mTextIndent;
mWordSpacing = parent->mWordSpacing;
#ifdef IBMBIDI
mUnicodeBidi = parent->mUnicodeBidi;
#endif // IBMBIDI
}
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();
#ifdef IBMBIDI
mUnicodeBidi = NS_STYLE_UNICODE_BIDI_INHERIT;
#endif // IBMBIDI
}
}
void StyleTextBlob::SetFrom(const nsStyleStruct* aSource)
{
nsCRT::memcpy((nsStyleText*)this, aSource, sizeof(nsStyleText));
}
void StyleTextBlob::CopyTo(nsStyleStruct* aDest) const
{
nsCRT::memcpy(aDest, (const nsStyleText*)this, sizeof(nsStyleText));
}
PRInt32 StyleTextBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleText* other = (nsStyleText*)aOther;
if ((mTextAlign == other->mTextAlign) &&
(mTextTransform == other->mTextTransform) &&
(mWhiteSpace == other->mWhiteSpace) &&
(mLetterSpacing == other->mLetterSpacing) &&
(mLineHeight == other->mLineHeight) &&
(mTextIndent == other->mTextIndent) &&
(mWordSpacing == other->mWordSpacing) &&
#ifdef IBMBIDI
(mUnicodeBidi == other->mUnicodeBidi) &&
#endif // IBMBIDI
(mVerticalAlign == other->mVerticalAlign)) {
if (mTextDecoration == other->mTextDecoration) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
PRUint32 StyleTextBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = AccumulateCRC(crc,(const char *)&mTextAlign,sizeof(mTextAlign));
crc = AccumulateCRC(crc,(const char *)&mTextDecoration,sizeof(mTextDecoration));
crc = AccumulateCRC(crc,(const char *)&mTextTransform,sizeof(mTextTransform));
crc = AccumulateCRC(crc,(const char *)&mWhiteSpace,sizeof(mWhiteSpace));
crc = StyleCoordCRC(crc,&mLetterSpacing);
crc = StyleCoordCRC(crc,&mLineHeight);
crc = StyleCoordCRC(crc,&mTextIndent);
crc = StyleCoordCRC(crc,&mWordSpacing);
crc = StyleCoordCRC(crc,&mVerticalAlign);
#ifdef IBMBIDI
crc = AccumulateCRC(crc,(const char *)&mUnicodeBidi,sizeof(mUnicodeBidi));
#endif // IBMBIDI
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleDisplay
//------------------------------------------------------------------------------
//
struct StyleDisplayBlob: public nsStyleDisplay, public StyleBlob {
StyleDisplayBlob(void) { MOZ_COUNT_CTOR(StyleDisplayBlob); }
virtual ~StyleDisplayBlob(void) { MOZ_COUNT_DTOR(StyleDisplayBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleDisplay*)this;};
private: // These are not allowed
StyleDisplayBlob(const StyleDisplayBlob& aOther);
StyleDisplayBlob& operator=(const StyleDisplayBlob& aOther);
};
void StyleDisplayBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
const nsStyleDisplay* parent = (nsStyleDisplay*)aParent;
if (nsnull != parent) {
mDirection = parent->mDirection;
mLanguage = parent->mLanguage;
mVisible = parent->mVisible;
}
else {
#ifdef IBMBIDI
PRUint32 mBidioptions;
aPresContext->GetBidi(&mBidioptions);
if (GET_BIDI_OPTION_DIRECTION(mBidioptions) == IBMBIDI_TEXTDIRECTION_RTL) {
mDirection = NS_STYLE_DIRECTION_RTL;
}
else {
mDirection = NS_STYLE_DIRECTION_LTR;
}
#else // ifdef IBMBIDI
aPresContext->GetDefaultDirection(&mDirection);
#endif // IBMBIDI
aPresContext->GetLanguage(getter_AddRefs(mLanguage));
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.SetRect(0,0,0,0);
#ifdef IBMBIDI
mExplicitDirection = NS_STYLE_DIRECTION_INHERIT;
#endif // IBMBIDI
}
void StyleDisplayBlob::SetFrom(const nsStyleStruct* aSource)
{
const nsStyleDisplay* source = (nsStyleDisplay*)aSource;
mDirection = source->mDirection;
#ifdef IBMBIDI
mExplicitDirection = source->mExplicitDirection;
#endif // IBMBIDI
mDisplay = source->mDisplay;
mFloats = source->mFloats;
mBreakType = source->mBreakType;
mBreakBefore = source->mBreakBefore;
mBreakAfter = source->mBreakAfter;
mVisible = source->mVisible;
mOverflow = source->mOverflow;
mClipFlags = source->mClipFlags;
mClip = source->mClip;
mLanguage = source->mLanguage;
}
void StyleDisplayBlob::CopyTo(nsStyleStruct* aDest) const
{
nsStyleDisplay* dest = (nsStyleDisplay*)aDest;
dest->mDirection = mDirection;
#ifdef IBMBIDI
dest->mExplicitDirection = mExplicitDirection;
#endif // IBMBIDI
dest->mDisplay = mDisplay;
dest->mFloats = mFloats;
dest->mBreakType = mBreakType;
dest->mBreakBefore = mBreakBefore;
dest->mBreakAfter = mBreakAfter;
dest->mVisible = mVisible;
dest->mOverflow = mOverflow;
dest->mClipFlags = mClipFlags;
dest->mClip = mClip;
dest->mLanguage = mLanguage;
}
PRInt32 StyleDisplayBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleDisplay* other = (nsStyleDisplay*)aOther;
if ((mDisplay == other->mDisplay) &&
(mFloats == other->mFloats) &&
(mOverflow == other->mOverflow)) {
if ((mDirection == other->mDirection) &&
(mLanguage == other->mLanguage) &&
(mBreakType == other->mBreakType) &&
(mBreakBefore == other->mBreakBefore) &&
(mBreakAfter == other->mBreakAfter)) {
if ((mVisible == other->mVisible) &&
(mClipFlags == other->mClipFlags) &&
(mClip == other->mClip)) {
return NS_STYLE_HINT_NONE;
}
if ((mVisible != other->mVisible) &&
((NS_STYLE_VISIBILITY_COLLAPSE == mVisible) ||
(NS_STYLE_VISIBILITY_COLLAPSE == other->mVisible))) {
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_FRAMECHANGE;
}
PRUint32 StyleDisplayBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = AccumulateCRC(crc,(const char *)&mDirection,sizeof(mDirection));
#ifdef IBMBIDI
crc = AccumulateCRC(crc,(const char *)&mExplicitDirection,sizeof(mExplicitDirection));
#endif // IBMBIDI
crc = AccumulateCRC(crc,(const char *)&mDisplay,sizeof(mDisplay));
crc = AccumulateCRC(crc,(const char *)&mFloats,sizeof(mFloats));
crc = AccumulateCRC(crc,(const char *)&mBreakType,sizeof(mBreakType));
crc = AccumulateCRC(crc,(const char *)&mBreakBefore,sizeof(mBreakBefore));
crc = AccumulateCRC(crc,(const char *)&mBreakAfter,sizeof(mBreakAfter));
crc = AccumulateCRC(crc,(const char *)&mVisible,sizeof(mVisible));
crc = AccumulateCRC(crc,(const char *)&mOverflow,sizeof(mOverflow));
crc = AccumulateCRC(crc,(const char *)&mClipFlags,sizeof(mClipFlags));
// crc = StyleMarginCRC(crc,&mClip);
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleTable
//------------------------------------------------------------------------------
//
struct StyleTableBlob: public nsStyleTable, public StyleBlob {
StyleTableBlob(void);
virtual ~StyleTableBlob(void) { MOZ_COUNT_DTOR(StyleTableBlob); };
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleTable*)this;};
private: // These are not allowed
StyleTableBlob(const StyleTableBlob& aOther);
StyleTableBlob& operator=(const StyleTableBlob& aOther);
};
StyleTableBlob::StyleTableBlob()
{
MOZ_COUNT_CTOR(StyleTableBlob);
ResetFrom(nsnull, nsnull);
}
void StyleTableBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
const nsStyleTable* parent = (nsStyleTable*)aParent;
// 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_ALL;
mCellPadding.Reset();
mSpan = 1;
if (parent) { // handle inherited properties
mBorderCollapse = parent->mBorderCollapse;
mEmptyCells = parent->mEmptyCells;
mCaptionSide = parent->mCaptionSide;
mBorderSpacingX = parent->mBorderSpacingX;
mBorderSpacingY = parent->mBorderSpacingY;
mSpanWidth = parent->mSpanWidth;
}
else {
mBorderCollapse = NS_STYLE_BORDER_SEPARATE;
nsCompatibility compatMode = eCompatibility_Standard;
if (aPresContext) {
aPresContext->GetCompatibilityMode(&compatMode);
}
mEmptyCells = (compatMode == eCompatibility_NavQuirks
? NS_STYLE_TABLE_EMPTY_CELLS_HIDE // bug 33244
: NS_STYLE_TABLE_EMPTY_CELLS_SHOW);
mCaptionSide = NS_SIDE_TOP;
mBorderSpacingX.Reset();
mBorderSpacingY.Reset();
mSpanWidth.Reset();
}
}
void StyleTableBlob::SetFrom(const nsStyleStruct* aSource)
{
nsCRT::memcpy((nsStyleTable*)this, aSource, sizeof(nsStyleTable));
}
void StyleTableBlob::CopyTo(nsStyleStruct* aDest) const
{
nsCRT::memcpy(aDest, (const nsStyleTable*)this, sizeof(nsStyleTable));
}
PRInt32 StyleTableBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleTable* other = (nsStyleTable*)aOther;
if ((mLayoutStrategy == other->mLayoutStrategy) &&
(mFrame == other->mFrame) &&
(mRules == other->mRules) &&
(mBorderCollapse == other->mBorderCollapse) &&
(mBorderSpacingX == other->mBorderSpacingX) &&
(mBorderSpacingY == other->mBorderSpacingY) &&
(mCellPadding == other->mCellPadding) &&
(mCaptionSide == other->mCaptionSide) &&
(mCols == other->mCols) &&
(mSpan == other->mSpan) &&
(mSpanWidth == other->mSpanWidth)) {
if (mEmptyCells == other->mEmptyCells) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
PRUint32 StyleTableBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = AccumulateCRC(crc,(const char *)&mLayoutStrategy,sizeof(mLayoutStrategy));
crc = AccumulateCRC(crc,(const char *)&mFrame,sizeof(mFrame));
crc = AccumulateCRC(crc,(const char *)&mRules,sizeof(mRules));
crc = AccumulateCRC(crc,(const char *)&mBorderCollapse,sizeof(mBorderCollapse));
crc = StyleCoordCRC(crc,&mBorderSpacingX);
crc = StyleCoordCRC(crc,&mBorderSpacingY);
crc = StyleCoordCRC(crc,&mCellPadding);
crc = AccumulateCRC(crc,(const char *)&mCaptionSide,sizeof(mCaptionSide));
crc = AccumulateCRC(crc,(const char *)&mEmptyCells,sizeof(mEmptyCells));
crc = AccumulateCRC(crc,(const char *)&mCols,sizeof(mCols));
crc = AccumulateCRC(crc,(const char *)&mSpan,sizeof(mSpan));
crc = StyleCoordCRC(crc,&mSpanWidth);
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleContent
//------------------------------------------------------------------------------
//
struct StyleContentBlob: public nsStyleContent, public StyleBlob {
StyleContentBlob(void) { MOZ_COUNT_CTOR(StyleContentBlob); };
virtual ~StyleContentBlob(void) { MOZ_COUNT_DTOR(StyleContentBlob); };
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleContent*)this;};
private: // These are not allowed
StyleContentBlob(const StyleContentBlob& aOther);
StyleContentBlob& operator=(const StyleContentBlob& aOther);
};
void
StyleContentBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
const nsStyleContent* parent = (nsStyleContent*)aParent;
// 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 (parent) {
if (NS_SUCCEEDED(AllocateQuotes(parent->mQuotesCount))) {
PRUint32 ix = (mQuotesCount * 2);
while (0 < ix--) {
mQuotes[ix] = parent->mQuotes[ix];
}
}
}
else {
mQuotesCount = 0;
DELETE_ARRAY_IF(mQuotes);
}
}
void StyleContentBlob::SetFrom(const nsStyleStruct* aSource)
{
const nsStyleContent* source = (nsStyleContent*)aSource;
mMarkerOffset = source->mMarkerOffset;
PRUint32 index;
if (NS_SUCCEEDED(AllocateContents(source->ContentCount()))) {
for (index = 0; index < mContentCount; index++) {
source->GetContentAt(index, mContents[index].mType, mContents[index].mContent);
}
}
if (NS_SUCCEEDED(AllocateCounterIncrements(source->CounterIncrementCount()))) {
for (index = 0; index < mIncrementCount; index++) {
source->GetCounterIncrementAt(index, mIncrements[index].mCounter,
mIncrements[index].mValue);
}
}
if (NS_SUCCEEDED(AllocateCounterResets(source->CounterResetCount()))) {
for (index = 0; index < mResetCount; index++) {
source->GetCounterResetAt(index, mResets[index].mCounter,
mResets[index].mValue);
}
}
if (NS_SUCCEEDED(AllocateQuotes(source->QuotesCount()))) {
PRUint32 count = (mQuotesCount * 2);
for (index = 0; index < count; index += 2) {
source->GetQuotesAt(index, mQuotes[index], mQuotes[index + 1]);
}
}
}
void StyleContentBlob::CopyTo(nsStyleStruct* aDest) const
{
nsStyleContent* dest = (nsStyleContent*)aDest;
dest->mMarkerOffset = mMarkerOffset;
PRUint32 index;
if (NS_SUCCEEDED(dest->AllocateContents(mContentCount))) {
for (index = 0; index < mContentCount; index++) {
dest->SetContentAt(index, mContents[index].mType,
mContents[index].mContent);
}
}
if (NS_SUCCEEDED(dest->AllocateCounterIncrements(mIncrementCount))) {
for (index = 0; index < mIncrementCount; index++) {
dest->SetCounterIncrementAt(index, mIncrements[index].mCounter,
mIncrements[index].mValue);
}
}
if (NS_SUCCEEDED(dest->AllocateCounterResets(mResetCount))) {
for (index = 0; index < mResetCount; index++) {
dest->SetCounterResetAt(index, mResets[index].mCounter,
mResets[index].mValue);
}
}
if (NS_SUCCEEDED(dest->AllocateQuotes(mQuotesCount))) {
PRUint32 count = (mQuotesCount * 2);
for (index = 0; index < count; index += 2) {
dest->SetQuotesAt(index, mQuotes[index], mQuotes[index + 1]);
}
}
}
PRInt32
StyleContentBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleContent* other = (nsStyleContent*)aOther;
if (mContentCount == other->mContentCount) {
if ((mMarkerOffset == other->mMarkerOffset) &&
(mIncrementCount == other->mIncrementCount) &&
(mResetCount == other->mResetCount) &&
(mQuotesCount == other->mQuotesCount)) {
PRUint32 ix = mContentCount;
while (0 < ix--) {
if ((mContents[ix].mType != other->mContents[ix].mType) ||
(mContents[ix].mContent != other->mContents[ix].mContent)) {
return NS_STYLE_HINT_REFLOW;
}
}
ix = mIncrementCount;
while (0 < ix--) {
if ((mIncrements[ix].mValue != other->mIncrements[ix].mValue) ||
(mIncrements[ix].mCounter != other->mIncrements[ix].mCounter)) {
return NS_STYLE_HINT_REFLOW;
}
}
ix = mResetCount;
while (0 < ix--) {
if ((mResets[ix].mValue != other->mResets[ix].mValue) ||
(mResets[ix].mCounter != other->mResets[ix].mCounter)) {
return NS_STYLE_HINT_REFLOW;
}
}
ix = (mQuotesCount * 2);
while (0 < ix--) {
if (mQuotes[ix] != other->mQuotes[ix]) {
return NS_STYLE_HINT_REFLOW;
}
}
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_FRAMECHANGE;
}
PRUint32 StyleContentBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = StyleCoordCRC(crc,&mMarkerOffset);
crc = AccumulateCRC(crc,(const char *)&mContentCount,sizeof(mContentCount));
crc = AccumulateCRC(crc,(const char *)&mIncrementCount,sizeof(mIncrementCount));
crc = AccumulateCRC(crc,(const char *)&mResetCount,sizeof(mResetCount));
crc = AccumulateCRC(crc,(const char *)&mQuotesCount,sizeof(mQuotesCount));
if (mContents) {
crc = AccumulateCRC(crc,(const char *)&(mContents->mType),sizeof(mContents->mType));
}
if (mIncrements) {
crc = AccumulateCRC(crc,(const char *)&(mIncrements->mValue),sizeof(mIncrements->mValue));
}
if (mResets) {
crc = AccumulateCRC(crc,(const char *)&(mResets->mValue),sizeof(mResets->mValue));
}
if (mQuotes) {
crc = StyleStringCRC(crc,mQuotes);
}
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleUserInterface
//------------------------------------------------------------------------------
//
struct StyleUserInterfaceBlob: public nsStyleUserInterface, public StyleBlob {
StyleUserInterfaceBlob(void) { MOZ_COUNT_CTOR(StyleUserInterfaceBlob); }
virtual ~StyleUserInterfaceBlob(void) { MOZ_COUNT_DTOR(StyleUserInterfaceBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleUserInterface*)this;};
private: // These are not allowed
StyleUserInterfaceBlob(const StyleUserInterfaceBlob& aOther);
StyleUserInterfaceBlob& operator=(const StyleUserInterfaceBlob& aOther);
};
void StyleUserInterfaceBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
const nsStyleUserInterface* parent = (nsStyleUserInterface*)aParent;
if (parent) {
mUserInput = parent->mUserInput;
mUserModify = parent->mUserModify;
mUserFocus = parent->mUserFocus;
}
else {
mUserInput = NS_STYLE_USER_INPUT_AUTO;
mUserModify = NS_STYLE_USER_MODIFY_READ_ONLY;
mUserFocus = NS_STYLE_USER_FOCUS_NONE;
}
mUserSelect = NS_STYLE_USER_SELECT_AUTO;
mKeyEquivalent = PRUnichar(0); // XXX what type should this be?
mResizer = NS_STYLE_RESIZER_AUTO;
mBehavior.SetLength(0);
}
void StyleUserInterfaceBlob::SetFrom(const nsStyleStruct* aSource)
{
const nsStyleUserInterface* source = (nsStyleUserInterface*)aSource;
mUserInput = source->mUserInput;
mUserModify = source->mUserModify;
mUserFocus = source->mUserFocus;
mUserSelect = source->mUserSelect;
mKeyEquivalent = source->mKeyEquivalent;
mResizer = source->mResizer;
mBehavior = source->mBehavior;
}
void StyleUserInterfaceBlob::CopyTo(nsStyleStruct* aDest) const
{
nsStyleUserInterface* dest = (nsStyleUserInterface*)aDest;
dest->mUserInput = mUserInput;
dest->mUserModify = mUserModify;
dest->mUserFocus = mUserFocus;
dest->mUserSelect = mUserSelect;
dest->mKeyEquivalent = mKeyEquivalent;
dest->mResizer = mResizer;
dest->mBehavior = mBehavior;
}
PRInt32 StyleUserInterfaceBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleUserInterface* other = (nsStyleUserInterface*)aOther;
if (mBehavior != other->mBehavior)
return NS_STYLE_HINT_FRAMECHANGE;
if ((mUserInput == other->mUserInput) &&
(mResizer == other->mResizer)) {
if ((mUserModify == other->mUserModify) &&
(mUserSelect == other->mUserSelect)) {
if ((mKeyEquivalent == other->mKeyEquivalent) &&
(mUserFocus == other->mUserFocus) &&
(mResizer == other->mResizer)) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_CONTENT;
}
return NS_STYLE_HINT_VISUAL;
}
if ((mUserInput != other->mUserInput) &&
((NS_STYLE_USER_INPUT_NONE == mUserInput) ||
(NS_STYLE_USER_INPUT_NONE == other->mUserInput))) {
return NS_STYLE_HINT_FRAMECHANGE;
}
return NS_STYLE_HINT_VISUAL;
}
PRUint32 StyleUserInterfaceBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = AccumulateCRC(crc,(const char *)&mUserInput,sizeof(mUserInput));
crc = AccumulateCRC(crc,(const char *)&mUserModify,sizeof(mUserModify));
crc = AccumulateCRC(crc,(const char *)&mUserSelect,sizeof(mUserSelect));
crc = AccumulateCRC(crc,(const char *)&mUserFocus,sizeof(mUserFocus));
crc = AccumulateCRC(crc,(const char *)&mKeyEquivalent,sizeof(mKeyEquivalent));
crc = AccumulateCRC(crc,(const char *)&mResizer,sizeof(mResizer));
PRUint32 len;
len = mBehavior.Length();
crc = AccumulateCRC(crc,(const char *)&len,sizeof(len));
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStylePrint
//------------------------------------------------------------------------------
//
struct StylePrintBlob: public nsStylePrint, public StyleBlob {
StylePrintBlob(void) { MOZ_COUNT_CTOR(StylePrintBlob); }
virtual ~StylePrintBlob(void) { MOZ_COUNT_DTOR(StylePrintBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStylePrint*)this;};
private: // These are not allowed
StylePrintBlob(const StylePrintBlob& aOther);
StylePrintBlob& operator=(const StylePrintBlob& aOther);
};
void StylePrintBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
const nsStylePrint* parent = (nsStylePrint*)aParent;
if (parent) {
mPageBreakBefore = parent->mPageBreakBefore;
mPageBreakAfter = parent->mPageBreakAfter;
mPageBreakInside = parent->mPageBreakInside;
mWidows = parent->mWidows;
mOrphans = parent->mOrphans;
mMarks = parent->mMarks;
mSizeWidth = parent->mSizeWidth;
mSizeHeight = parent->mSizeHeight;
}
else {
mPageBreakBefore = NS_STYLE_PAGE_BREAK_AUTO;
mPageBreakAfter = NS_STYLE_PAGE_BREAK_AUTO;
mPageBreakInside = NS_STYLE_PAGE_BREAK_AUTO;
mWidows = 2;
mOrphans = 2;
mMarks = NS_STYLE_PAGE_MARKS_NONE;
mSizeWidth.SetAutoValue();
mSizeHeight.SetAutoValue();
}
}
void StylePrintBlob::SetFrom(const nsStyleStruct* aSource)
{
const nsStylePrint* source = (nsStylePrint*)aSource;
mPageBreakBefore = source->mPageBreakBefore;
mPageBreakAfter = source->mPageBreakAfter;
mPageBreakInside = source->mPageBreakInside;
mPage = source->mPage;
mWidows = source->mWidows;
mOrphans = source->mOrphans;
mMarks = source->mMarks;
mSizeWidth = source->mSizeWidth;
mSizeHeight = source->mSizeHeight;
}
void StylePrintBlob::CopyTo(nsStyleStruct* aDest) const
{
nsStylePrint* dest = (nsStylePrint*)aDest;
dest->mPageBreakBefore = mPageBreakBefore;
dest->mPageBreakAfter = mPageBreakAfter;
dest->mPageBreakInside = mPageBreakInside;
dest->mPage = mPage;
dest->mWidows = mWidows;
dest->mOrphans = mOrphans;
dest->mMarks = mMarks;
dest->mSizeWidth = mSizeWidth;
dest->mSizeHeight = mSizeHeight;
}
PRInt32 StylePrintBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStylePrint* other = (nsStylePrint*)aOther;
if ((mPageBreakBefore == other->mPageBreakBefore)
&& (mPageBreakAfter == other->mPageBreakAfter)
&& (mPageBreakInside == other->mPageBreakInside)
&& (mWidows == other->mWidows)
&& (mOrphans == other->mOrphans)
&& (mMarks == other->mMarks)
&& (mSizeWidth == other->mSizeWidth)
&& (mSizeHeight == other->mSizeHeight)) {
return NS_STYLE_HINT_NONE;
}
if (mMarks != other->mMarks) {
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
PRUint32 StylePrintBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = AccumulateCRC(crc,(const char *)&mPageBreakBefore,sizeof(mPageBreakBefore));
crc = AccumulateCRC(crc,(const char *)&mPageBreakAfter,sizeof(mPageBreakAfter));
crc = AccumulateCRC(crc,(const char *)&mPageBreakInside,sizeof(mPageBreakInside));
PRUint32 len = mPage.Length();
crc = AccumulateCRC(crc,(const char *)&len,sizeof(len));
crc = AccumulateCRC(crc,(const char *)&mWidows,sizeof(mWidows));
crc = AccumulateCRC(crc,(const char *)&mOrphans,sizeof(mOrphans));
crc = AccumulateCRC(crc,(const char *)&mMarks,sizeof(mMarks));
crc = StyleCoordCRC(crc,&mSizeWidth);
crc = StyleCoordCRC(crc,&mSizeHeight);
#endif
return crc;
}
#ifdef XP_MAC
#pragma mark -
#endif
#ifdef INCLUDE_XUL
//------------------------------------------------------------------------------
// nsStyleXUL
//------------------------------------------------------------------------------
//
struct StyleXULBlob: public nsStyleXUL, public StyleBlob {
StyleXULBlob() { MOZ_COUNT_CTOR(StyleXULBlob); }
virtual ~StyleXULBlob() { MOZ_COUNT_DTOR(StyleXULBlob); }
virtual void ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext);
virtual void SetFrom(const nsStyleStruct* aSource);
virtual void CopyTo(nsStyleStruct* aDest) const;
virtual PRInt32 CalcDifference(const nsStyleStruct* aOther) const;
virtual PRUint32 ComputeCRC32(PRUint32 aCrc) const;
inline virtual const nsStyleStruct* GetData(void) const {return (const nsStyleXUL*)this;};
private: // These are not allowed
StyleXULBlob(const StyleXULBlob& aOther);
StyleXULBlob& operator=(const StyleXULBlob& aOther);
};
void StyleXULBlob::ResetFrom(const nsStyleStruct* aParent, nsIPresContext* aPresContext)
{
mBoxOrient = NS_STYLE_BOX_ORIENT_HORIZONTAL;
}
void StyleXULBlob::SetFrom(const nsStyleStruct* aSource)
{
const nsStyleXUL* source = (nsStyleXUL*)aSource;
mBoxOrient = source->mBoxOrient;
}
void StyleXULBlob::CopyTo(nsStyleStruct* aDest) const
{
nsStyleXUL* dest = (nsStyleXUL*)aDest;
dest->mBoxOrient = mBoxOrient;
}
PRInt32 StyleXULBlob::CalcDifference(const nsStyleStruct* aOther) const
{
const nsStyleXUL* other = (nsStyleXUL*)aOther;
if (mBoxOrient == other->mBoxOrient)
return NS_STYLE_HINT_NONE;
return NS_STYLE_HINT_REFLOW;
}
PRUint32 StyleXULBlob::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
#ifdef COMPUTE_STYLEDATA_CRC
crc = AccumulateCRC(crc,(const char *)&mBoxOrient,sizeof(mBoxOrient));
#endif
return crc;
}
#endif // INCLUDE_XUL
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// nsStyleContextData
//------------------------------------------------------------------------------
//
// ---------------------
// Macros for getting style data (StyleXXXBlob and nsStyleXXX)
//
#define STYLEDATA(type) nsStyle##type
#define STYLEBLOB(type) Style##type##Blob
#define BLOBARRAY mStyleData->mData.mBlobArray
#define GETDATA(type) ((const nsStyle##type##*)FetchInheritedStyleStruct(eStyleStruct_##type))
#define GETBLOB(type) ((STYLEBLOB(##type##)*)FetchInheritedStyleBlob(eStyleStruct_##type))
// Use the macro below with extreme caution. The only place where
// we want, and where we *can*, access the data pointers directly
// for modification (ie. non-const pointers) is in RemapStyle()
// because we are then garanteed to have the blobs in place.
// Everywhere else, the pointers can be null.
//
// On a related note... We never want to cast the pointer returned
// by FetchInheritedStyleStruct() to a non-const pointer because it
// would modify the parent's style (or the grand-parent's style)
// but not the current context's style.
#define GETMUTABLEDATAPTR(type) ((nsStyle##type##*)BLOBARRAY[eStyleStruct_##type - 1]->GetData())
// Same warning as above, except that it returns a const pointer.
// It's just a faster alternative to GETDATA() for use inside
// RemapStyle() only.
#define GETDATAPTR(type) ((const nsStyle##type##*)BLOBARRAY[eStyleStruct_##type - 1]->GetData())
// ---------------------
// Debug definitions
//
#ifdef DEBUG //xxx pierre
// Define this to get stats on the use of the
// nsStyleStructs inside a nsStyleContextData.
//#define LOG_STYLE_STRUCTS
// Define this to get statistics on the number of calls
// to GetStyleData() and their depth in the Style tree.
//#define LOG_GET_STYLE_DATA_CALLS
// Define this to get statistics on the number of calls
// to WriteMutableStyleData().
//#define LOG_WRITE_STYLE_DATA_CALLS
#ifdef LOG_STYLE_STRUCTS
class StyleFontImplLog;
class StyleColorImplLog;
class StyleListImplLog;
class StylePositionImplLog;
class StyleTextImplLog;
class StyleDisplayImplLog;
class StyleTableImplLog;
class StyleContentImplLog;
class StyleUserInterfaceImplLog;
class StylePrintImplLog;
class StyleMarginImplLog;
class StylePaddingImplLog;
class StyleBorderImplLog;
class StyleOutlineImplLog;
#undef STYLEBLOB(data)
#define STYLEBLOB(data) Style##data##ImplLog
#endif //LOG_STYLE_STRUCTS
#endif //DEBUG
// ---------------------
// nsStyleContextData
//
class nsStyleContextData
{
public:
friend class StyleContextImpl;
void SizeOf(nsISizeOfHandler *aSizeOfHandler, PRUint32 &aSize);
private: // all data and methods private: only friends have access
#ifdef LOG_STYLE_STRUCTS
public:
#endif
#ifdef LOG_WRITE_STYLE_DATA_CALLS
public:
#endif
#ifdef SHARE_STYLECONTEXTS
static nsStyleContextData *Create(nsIStyleContext* aStyleContext, nsIPresContext *aPresContext);
#endif
static StyleBlob* AllocateOneBlob(nsStyleStructID aSID, nsIPresContext *aPresContext);
nsresult AllocateStyleBlobs(nsIStyleContext* aStyleContext, nsIPresContext *aPresContext);
void DeleteStyleBlobs();
nsStyleContextData();
~nsStyleContextData(void);
// the style data...
// - StyleContextImpl gets friend-access
//
union {
StyleBlob* mBlobArray[eStyleStruct_Max];
struct {
STYLEBLOB(Font)* mFont;
STYLEBLOB(Color)* mColor;
STYLEBLOB(List)* mList;
STYLEBLOB(Position)* mPosition;
STYLEBLOB(Text)* mText;
STYLEBLOB(Display)* mDisplay;
STYLEBLOB(Table)* mTable;
STYLEBLOB(Content)* mContent;
STYLEBLOB(UserInterface)* mUserInterface;
STYLEBLOB(Print)* mPrint;
STYLEBLOB(Margin)* mMargin;
STYLEBLOB(Padding)* mPadding;
STYLEBLOB(Border)* mBorder;
STYLEBLOB(Outline)* mOutline;
#ifdef INCLUDE_XUL
STYLEBLOB(XUL)* mXUL;
#endif
//#insert new style structs here#
} mBlobs;
} mData;
#ifdef SHARE_STYLECONTEXTS
PRUint32 mRefCnt;
inline PRUint32 AddRef(void);
inline PRUint32 Release(void);
#ifdef DEBUG
static PRUint32 gInstanceCount;
#endif
#ifdef COMPUTE_STYLEDATA_CRC
PRUint32 mCRC;
PRUint32 ComputeCRC32(PRUint32 aCrc) const;
PRUint32 GetCRC32(void) const { return mCRC; }
void SetCRC32(void) {
mCRC = ComputeCRC32(0);
if (mCRC==STYLEDATA_NO_CRC) {
mCRC = STYLEDATA_DEFAULT_CRC;
}
}
#endif // COMPUTE_STYLEDATA_CRC
#endif // SHARE_STYLECONTEXTS
#ifdef LOG_STYLE_STRUCTS
PRBool mGotMutable[eStyleStruct_Max];
#endif
};
#ifdef DEBUG //xxx pierre
#include "nsStyleContextDebug.h"
#endif
#ifdef SHARE_STYLECONTEXTS
// ---------------------
// AddRef
//
inline PRUint32 nsStyleContextData::AddRef(void)
{
++mRefCnt;
NS_LOG_ADDREF(this,mRefCnt,"nsStyleContextData",sizeof(*this));
return mRefCnt;
}
// ---------------------
// Release
//
inline PRUint32 nsStyleContextData::Release(void)
{
NS_ASSERTION(mRefCnt > 0, "RefCount error in nsStyleContextData");
--mRefCnt;
NS_LOG_RELEASE(this,mRefCnt,"nsStyleContextData");
if (0 == mRefCnt) {
#ifdef NOISY_DEBUG
printf("deleting nsStyleContextData instance: (%ld)\n", (long)(--gInstanceCount));
#endif
delete this;
return 0;
}
return mRefCnt;
}
#ifdef DEBUG
/*static*/ PRUint32 nsStyleContextData::gInstanceCount;
#endif // DEBUG
// ---------------------
// Create
//
nsStyleContextData *nsStyleContextData::Create(nsIStyleContext* aStyleContext, nsIPresContext *aPresContext)
{
NS_ASSERTION(aPresContext != nsnull, "parameter cannot be null");
nsStyleContextData *pData = nsnull;
if (aPresContext) {
pData = new nsStyleContextData();
if (pData) {
if (NS_SUCCEEDED(pData->AllocateStyleBlobs(aStyleContext, aPresContext))) {
#ifdef SHARE_STYLECONTEXTS
NS_ADDREF(pData);
#ifdef NOISY_DEBUG
printf("new nsStyleContextData instance: (%ld) CRC=%lu\n",
(long)(++gInstanceCount), (unsigned long)pData->ComputeCRC32(0));
#endif // NOISY_DEBUG
#endif // SHARE_STYLECONTEXTS
}
else {
delete pData;
pData = nsnull;
}
}
}
return pData;
}
#endif //SHARE_STYLECONTEXTS
// ---------------------
// nsStyleContextData ctor
//
nsStyleContextData::nsStyleContextData()
{
#ifdef SHARE_STYLECONTEXTS
mRefCnt = 0;
#ifdef COMPUTE_STYLEDATA_CRC
mCRC = 0;
#endif
#endif
for (short i = 0; i < eStyleStruct_Max; i ++) {
mData.mBlobArray[i] = nsnull;
#ifdef LOG_STYLE_STRUCTS
mGotMutable[i] = PR_FALSE;
#endif
}
}
// ---------------------
// AllocateOneBlob
//
StyleBlob* nsStyleContextData::AllocateOneBlob(nsStyleStructID aSID, nsIPresContext *aPresContext)
{
StyleBlob* result = nsnull;
switch (aSID) {
case eStyleStruct_Font:
if (aPresContext) {
result = new STYLEBLOB(Font)(aPresContext->GetDefaultFontDeprecated(), aPresContext->GetDefaultFixedFontDeprecated());
}
else {
result = new STYLEBLOB(Font);
}
break;
case eStyleStruct_Color: result = new STYLEBLOB(Color); break;
case eStyleStruct_List: result = new STYLEBLOB(List); break;
case eStyleStruct_Position: result = new STYLEBLOB(Position); break;
case eStyleStruct_Text: result = new STYLEBLOB(Text); break;
case eStyleStruct_Display: result = new STYLEBLOB(Display); break;
case eStyleStruct_Table: result = new STYLEBLOB(Table); break;
case eStyleStruct_Content: result = new STYLEBLOB(Content); break;
case eStyleStruct_UserInterface: result = new STYLEBLOB(UserInterface); break;
case eStyleStruct_Print: result = new STYLEBLOB(Print); break;
case eStyleStruct_Margin: result = new STYLEBLOB(Margin); break;
case eStyleStruct_Padding: result = new STYLEBLOB(Padding); break;
case eStyleStruct_Border: result = new STYLEBLOB(Border); break;
case eStyleStruct_Outline: result = new STYLEBLOB(Outline); break;
#ifdef INCLUDE_XUL
case eStyleStruct_XUL: result = new STYLEBLOB(XUL); break;
#endif
//#insert new style structs here#
default:
NS_ERROR("Invalid style struct id");
break;
}
NS_ASSERTION(result != nsnull, "Out of mem");
return result;
}
// ---------------------
// CanShareStyleData
// Sharing of style data for the GfxScrollFrame is problematic
// and is currently disabled. These pseudos indicate the use of a GfxScrollFrame
// so we check for them and disallow sharing when any are found.
// If you haven't guessed it, this is a total hack until we can figure out
// why the GfxScrollFrame is not happy having its style data shared...
// (See bugzilla bug 39618 which also documents this problem)
//
static PRBool CanShareStyleData(nsIStyleContext* aStyleContext)
{
PRBool isSharingSupported = PR_TRUE;
nsIAtom* pseudoTag;
aStyleContext->GetPseudoType(pseudoTag);
if (pseudoTag) {
if (pseudoTag == nsLayoutAtoms::viewportPseudo ||
pseudoTag == nsLayoutAtoms::canvasPseudo ||
pseudoTag == nsLayoutAtoms::viewportScrollPseudo ||
pseudoTag == nsLayoutAtoms::scrolledContentPseudo ||
pseudoTag == nsLayoutAtoms::selectScrolledContentPseudo) {
isSharingSupported = PR_FALSE;
} else {
isSharingSupported = PR_TRUE;
}
}
NS_IF_RELEASE(pseudoTag);
return isSharingSupported;
}
// ---------------------
// AllocateStyleBlobs
//
nsresult nsStyleContextData::AllocateStyleBlobs(nsIStyleContext* aStyleContext, nsIPresContext *aPresContext)
{
short i;
// clear the pointers: we'll inherit from the parent (if we have a parent)
for (i = 0; i < eStyleStruct_Max; i ++) {
mData.mBlobArray[i] = nsnull;
}
if (CanShareStyleData(aStyleContext)) {
nsIStyleContext* parent = aStyleContext->GetParent();
if (parent != nsnull) {
NS_RELEASE(parent);
return NS_OK;
}
}
// no parent: allocate the blobs
for (i = 0; i < eStyleStruct_Max; i ++) {
nsStyleStructID structID = (nsStyleStructID)(i + 1);
mData.mBlobArray[i] = AllocateOneBlob(structID, aPresContext);
if (!mData.mBlobArray[i]) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
return NS_OK;
}
// ---------------------
// DeleteStyleBlobs
//
#define NS_IF_DELETE(ptr) \
if (nsnull != ptr) { delete ptr; ptr = nsnull; }
void nsStyleContextData::DeleteStyleBlobs() {
for (short i = 0; i < eStyleStruct_Max; i ++) {
NS_IF_DELETE(mData.mBlobArray[i]);
}
}
// ---------------------
// nsStyleContextData dtor
//
nsStyleContextData::~nsStyleContextData(void)
{
#ifdef SHARE_STYLECONTEXTS
NS_ASSERTION(0 == mRefCnt, "RefCount error in ~nsStyleContextData");
#endif
// debug here...
#ifdef LOG_STYLE_STRUCTS
LogStyleStructs(this);
#endif
DeleteStyleBlobs();
}
// ---------------------
// ComputeCRC32
//
#ifdef COMPUTE_STYLEDATA_CRC
PRUint32 nsStyleContextData::ComputeCRC32(PRUint32 aCrc) const
{
PRUint32 crc = aCrc;
// have each style blob compute its own CRC, propagating the previous value...
for (short i = 0; i < eStyleStruct_Max; i ++) {
if (mData.mBlobArray[i]) {
crc = mData.mBlobArray[i]->ComputeCRC32(crc);
}
}
return crc;
}
#endif
// ---------------------
// SizeOf
//
void nsStyleContextData::SizeOf(nsISizeOfHandler *aSizeOfHandler, PRUint32 &aSize)
{
NS_ASSERTION(aSizeOfHandler, "SizeOfHandler cannot be null in SizeOf");
// first get the unique items collection
UNIQUE_STYLE_ITEMS(uniqueItems);
if(! uniqueItems->AddItem((void*)this) ){
// object has already been accounted for
return;
}
// get or create a tag for this instance
nsCOMPtr<nsIAtom> tag;
tag = getter_AddRefs(NS_NewAtom("StyleContextData"));
// get the size of an empty instance and add to the sizeof handler
aSize = sizeof(*this);
// add the sizes of the individual style blobs
if (mData.mBlobs.mFont) aSize += sizeof(StyleFontBlob);
if (mData.mBlobs.mColor) aSize += sizeof(StyleColorBlob);
if (mData.mBlobs.mList) aSize += sizeof(StyleListBlob);
if (mData.mBlobs.mPosition) aSize += sizeof(StylePositionBlob);
if (mData.mBlobs.mText) aSize += sizeof(StyleTextBlob);
if (mData.mBlobs.mDisplay) aSize += sizeof(StyleDisplayBlob);
if (mData.mBlobs.mTable) aSize += sizeof(StyleTableBlob);
if (mData.mBlobs.mContent) aSize += sizeof(StyleContentBlob);
if (mData.mBlobs.mUserInterface) aSize += sizeof(StyleUserInterfaceBlob);
if (mData.mBlobs.mPrint) aSize += sizeof(StylePrintBlob);
if (mData.mBlobs.mMargin) aSize += sizeof(StyleMarginBlob);
if (mData.mBlobs.mPadding) aSize += sizeof(StylePaddingBlob);
if (mData.mBlobs.mBorder) aSize += sizeof(StyleBorderBlob);
if (mData.mBlobs.mOutline) aSize += sizeof(StyleOutlineBlob);
#ifdef INCLUDE_XUL
if (mData.mBlobs.mXUL) aSize += sizeof(StyleXULBlob);
#endif
//#insert new style structs here#
aSizeOfHandler->AddSize(tag,aSize);
}
//------------------------------------------------------------------------------
// StyleContextImpl
//------------------------------------------------------------------------------
//
class StyleContextImpl : public nsIStyleContext,
protected nsIMutableStyleContext { // you can't QI to nsIMutableStyleContext
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;
virtual nsresult WrapRemapStyle(nsIPresContext* aPresContext, PRBool aEnterRemapStyle);
NS_IMETHOD RemapStyle(nsIPresContext* aPresContext, PRBool aRecurse = PR_TRUE);
//---------------------------
// Read/Write Style Data
NS_IMETHOD GetStyle(nsStyleStructID aSID, nsStyleStruct& aStruct) const;
inline virtual const nsStyleStruct* GetStyleData(nsStyleStructID aSID);
protected:
inline const nsStyleStruct* FetchInheritedStyleStruct(nsStyleStructID aSID) const {
return FetchInheritedStyleBlob(aSID)->GetData();
};
virtual StyleBlob* FetchInheritedStyleBlob(nsStyleStructID aSID) const;
virtual void ReadMutableStyleData(nsStyleStructID aSID, nsStyleStruct** aStyleStructPtr);
virtual nsresult WriteMutableStyleData(nsStyleStructID aSID, nsStyleStruct* aStyleStruct);
virtual nsresult WriteStyleData(nsStyleStructID aSID, const nsStyleStruct* aStyleStruct);
//---------------------------
public:
virtual void ForceUnique(void);
virtual void RecalcAutomaticData(nsIPresContext* aPresContext);
virtual void CalcBorderPaddingFor(const nsIFrame* aFrame, nsMargin& aBorderPadding) const;
NS_IMETHOD CalcStyleDifference(nsIStyleContext* aOther, PRInt32& aHint,PRBool aStopAtFirstDifference = PR_FALSE) const;
#ifdef SHARE_STYLECONTEXTS
//---------------------------
// Style Context Sharing
//
// evaluate and execute the style data sharing
// - if nothing to share, it leaves the current style data intact,
// otherwise it calls ShareStyleDataFrom to share another context's data
// and releases the old data
nsresult ShareStyleData(void);
// share the style data of the StyleDataDonor
// NOTE: the donor instance is cast to a StyleContextImpl to keep the
// interface free of implementation types. This may be invalid in
// the future
// XXX - reconfigure APIs to avoid casting the interface to the impl
nsresult ShareStyleDataFrom(nsIStyleContext*aStyleDataDonor);
// sets aMatches to PR_TRUE if the style data of aStyleContextToMatch matches the
// style data of this, PR_FALSE otherwise
NS_IMETHOD StyleDataMatches(nsIStyleContext* aStyleContextToMatch, PRBool *aMatches);
// get the key for this context (CRC32 value)
NS_IMETHOD GetStyleContextKey(scKey &aKey) const;
// update the style set cache by adding this context to it
// - NOTE: mStyleSet member must be set
nsresult UpdateStyleSetCache( void ) const;
#endif // SHARE_STYLECONTEXTS
//---------------------------
// Regression Data
//
virtual void List(FILE* out, PRInt32 aIndent);
virtual void SizeOf(nsISizeOfHandler *aSizeOfHandler, PRUint32 &aSize);
#ifdef DEBUG
virtual void DumpRegressionData(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent);
#endif
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;
PRInt16 mDataCode;
#ifdef LOG_WRITE_STYLE_DATA_CALLS
public:
#endif
nsStyleContextData* mStyleData;
#ifndef SHARE_STYLECONTEXTS
nsStyleContextData mStyleDataImpl;
#endif
// make sure we have valid style data
nsresult EnsureStyleData(nsIPresContext* aPresContext);
nsresult HaveStyleData(void) const;
nsCOMPtr<nsIStyleSet> mStyleSet;
};
static PRInt32 gLastDataCode;
static PRBool HashStyleRule(nsISupports* aRule, void* aData)
{
*((PRUint32*)aData) ^= PRUint32(aRule);
return PR_TRUE;
}
#ifdef XP_MAC
#pragma mark -
#endif
//------------------------------------------------------------------------------
// StyleContextImpl ctor
//------------------------------------------------------------------------------
//
StyleContextImpl::StyleContextImpl(nsIStyleContext* aParent,
nsIAtom* aPseudoTag,
nsISupportsArray* aRules,
nsIPresContext* aPresContext)
: mParent((StyleContextImpl*)aParent),
mChild(nsnull),
mEmptyChild(nsnull),
mPseudoTag(aPseudoTag),
mRules(aRules),
mDataCode(-1),
mStyleData(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);
}
#ifdef SHARE_STYLECONTEXTS
// remember the style set (for style context sharing)
nsIPresShell* shell = nsnull;
aPresContext->GetShell(&shell);
if (shell) {
shell->GetStyleSet( getter_AddRefs(mStyleSet) );
NS_RELEASE( shell );
}
#endif // SHARE_STYLECONTEXTS
}
//------------------------------------------------------------------------------
// StyleContextImpl dtor
//------------------------------------------------------------------------------
//
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);
#ifdef SHARE_STYLECONTEXTS
// remove this instance from the style set (remember, the set does not AddRef or Release us)
if (mStyleSet) {
mStyleSet->RemoveStyleContext((nsIStyleContext *)this);
} else {
NS_ASSERTION(0, "StyleSet is not optional in a StyleContext's dtor...");
}
// release the style data so it can be reclaimed when no longer referenced
NS_IF_RELEASE(mStyleData);
#endif // SHARE_STYLECONTEXTS
}
NS_IMPL_ADDREF(StyleContextImpl)
NS_IMPL_RELEASE(StyleContextImpl)
//------------------------------------------------------------------------------
// QueryInterface
//------------------------------------------------------------------------------
//
NS_IMETHODIMP
StyleContextImpl::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(nsnull != aInstancePtr, "null pointer");
if (nsnull == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
if (aIID.Equals(NS_GET_IID(nsIStyleContext))) {
*aInstancePtr = (void*)(nsIStyleContext*)this;
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(kISupportsIID)) {
*aInstancePtr = (void*) (nsISupports*)(nsIStyleContext*)this;
NS_ADDREF_THIS();
return NS_OK;
}
return NS_NOINTERFACE;
}
//------------------------------------------------------------------------------
// GetParent
//------------------------------------------------------------------------------
//
nsIStyleContext* StyleContextImpl::GetParent(void) const
{
NS_IF_ADDREF(mParent);
return mParent;
}
//------------------------------------------------------------------------------
// AppendChild
//------------------------------------------------------------------------------
//
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;
}
}
}
//------------------------------------------------------------------------------
// RemoveChild
//------------------------------------------------------------------------------
//
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;
}
//------------------------------------------------------------------------------
// GetStyleRules
//------------------------------------------------------------------------------
//
nsISupportsArray* StyleContextImpl::GetStyleRules(void) const
{
nsISupportsArray* result = mRules;
NS_IF_ADDREF(result);
return result;
}
//------------------------------------------------------------------------------
// GetStyleRuleCount
//------------------------------------------------------------------------------
//
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;
}
//------------------------------------------------------------------------------
// GetPseudoType
//------------------------------------------------------------------------------
//
NS_IMETHODIMP
StyleContextImpl::GetPseudoType(nsIAtom*& aPseudoTag) const
{
aPseudoTag = mPseudoTag;
NS_IF_ADDREF(aPseudoTag);
return NS_OK;
}
//------------------------------------------------------------------------------
// FindChildWithRules
//------------------------------------------------------------------------------
//
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;
}
//------------------------------------------------------------------------------
// Equals
//------------------------------------------------------------------------------
//
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;
}
//------------------------------------------------------------------------------
// HashValue
//------------------------------------------------------------------------------
//
PRUint32 StyleContextImpl::HashValue(void) const
{
return mRuleHash;
}
//------------------------------------------------------------------------------
// FetchInheritedStyleBlob
//------------------------------------------------------------------------------
// For a given type of style data, get the first non-null pointer
// in the style context hierarchy, . When a pointer is null, it means
// that we are inheriting that particular style from the parent. Style
// contexts without parent have all their style data allocated.
//
// IMPORTANT: Do not use the GETDATA() macros in this function
//
StyleBlob* StyleContextImpl::FetchInheritedStyleBlob(nsStyleStructID aSID) const
{
NS_PRECONDITION(aSID > 0 && aSID <= eStyleStruct_Max, "Invalid style struct id");
short index = aSID - 1;
StyleBlob* result = nsnull;
const StyleContextImpl* sc = this;
while (sc) {
result = sc->BLOBARRAY[index];
if (result) {
break;
}
sc = sc->mParent;
}
if (result == nsnull) {
NS_WARNING("Did not find style blob");
// Allocate the missing blob. This should never happen, but who knows?
BLOBARRAY[index] = mStyleData->AllocateOneBlob(aSID, nsnull);
result = BLOBARRAY[index];
}
return result;
}
//------------------------------------------------------------------------------
// GetStyleData
//------------------------------------------------------------------------------
//
const nsStyleStruct* StyleContextImpl::GetStyleData(nsStyleStructID aSID)
{
NS_PRECONDITION(aSID > 0 && aSID <= eStyleStruct_Max, "Invalid style struct id");
#ifdef LOG_GET_STYLE_DATA_CALLS
LogGetStyleDataCall(aSID, logCallType_GetStyleData, this, PR_TRUE);
#endif
const nsStyleStruct* result = FetchInheritedStyleStruct(aSID);
#ifdef LOG_GET_STYLE_DATA_CALLS
LogGetStyleDataCall(aSID, logCallType_GetStyleData, this, PR_FALSE);
#endif
return result;
}
//------------------------------------------------------------------------------
// GetNewMutableStyleStruct [static]
//------------------------------------------------------------------------------
// Notes:
// - We can't get more than 4 mutable style structs of the same type at the same time.
// - Keep in sync with the comments in the declaration of ReadMutableStyleData()
// in nsIMutableStyleContext.h and nsIStyleContext.h
const short kStructIndexMax = 4;
static STYLEDATA(Font) gStructFont[kStructIndexMax];
static STYLEDATA(Color) gStructColor[kStructIndexMax];
static STYLEDATA(List) gStructList[kStructIndexMax];
static STYLEDATA(Position) gStructPosition[kStructIndexMax];
static STYLEDATA(Text) gStructText[kStructIndexMax];
static STYLEDATA(Display) gStructDisplay[kStructIndexMax];
static STYLEDATA(Table) gStructTable[kStructIndexMax];
static STYLEDATA(Content) gStructContent[kStructIndexMax];
static STYLEDATA(UserInterface) gStructUserInterface[kStructIndexMax];
static STYLEDATA(Print) gStructPrint[kStructIndexMax];
static STYLEDATA(Margin) gStructMargin[kStructIndexMax];
static STYLEDATA(Padding) gStructPadding[kStructIndexMax];
static STYLEDATA(Border) gStructBorder[kStructIndexMax];
static STYLEDATA(Outline) gStructOutline[kStructIndexMax];
#ifdef INCLUDE_XUL
static STYLEDATA(XUL) gStructXUL[kStructIndexMax];
#endif
//#insert new style structs here#
nsStyleStruct* gStructPointer[eStyleStruct_Max][kStructIndexMax];
PRBool gStructBusy[eStyleStruct_Max][kStructIndexMax];
static nsStyleStruct* GetNewMutableStyleStruct(nsStyleStructID aSID) {
nsStyleStruct* result = nsnull;
static PRBool initialized = PR_FALSE;
if (!initialized) {
initialized = PR_TRUE;
for (short structType = 0; structType < eStyleStruct_Max; structType++) {
nsStyleStructID structID = (nsStyleStructID)(structType + 1);
for (short structIndex = 0; structIndex < kStructIndexMax; structIndex++) {
nsStyleStruct* structPtr = nsnull;
switch (structID) {
case eStyleStruct_Font: structPtr = &gStructFont[structIndex]; break;
case eStyleStruct_Color: structPtr = &gStructColor[structIndex]; break;
case eStyleStruct_List: structPtr = &gStructList[structIndex]; break;
case eStyleStruct_Position: structPtr = &gStructPosition[structIndex]; break;
case eStyleStruct_Text: structPtr = &gStructText[structIndex]; break;
case eStyleStruct_Display: structPtr = &gStructDisplay[structIndex]; break;
case eStyleStruct_Table: structPtr = &gStructTable[structIndex]; break;
case eStyleStruct_Content: structPtr = &gStructContent[structIndex]; break;
case eStyleStruct_UserInterface: structPtr = &gStructUserInterface[structIndex]; break;
case eStyleStruct_Print: structPtr = &gStructPrint[structIndex]; break;
case eStyleStruct_Margin: structPtr = &gStructMargin[structIndex]; break;
case eStyleStruct_Padding: structPtr = &gStructPadding[structIndex]; break;
case eStyleStruct_Border: structPtr = &gStructBorder[structIndex]; break;
case eStyleStruct_Outline: structPtr = &gStructOutline[structIndex]; break;
#ifdef INCLUDE_XUL
case eStyleStruct_XUL: structPtr = &gStructXUL[structIndex]; break;
#endif
//#insert new style structs here#
default:
NS_ERROR("Invalid style struct id");
break;
}
gStructPointer[structType][structIndex] = structPtr;
gStructBusy[structType][structIndex] = PR_FALSE;
}
}
}
short structType = aSID - 1;
for (short structIndex = 0; structIndex < kStructIndexMax; structIndex++) {
if (!gStructBusy[structType][structIndex]) {
result = gStructPointer[structType][structIndex];
gStructBusy[structType][structIndex] = PR_TRUE;
break;
}
}
if (!result) {
NS_ERROR("Reached maximum number of mutable style structs of a certain type");
// Return something or we gonna crash: callers don't always check the returned pointer.
// By returning a structure which is already in use, we'll only have rendering errors.
// Anyhow, this is just a safety fallback, in case people in the future don't follow
// the instructions in "nsIMutableStyleContext.h" about the limit on mutable pointers
// that one can get at any single time.
result = gStructPointer[structType][0];
}
return result;
}
//------------------------------------------------------------------------------
// ReleaseMutableStyleStruct [static]
//------------------------------------------------------------------------------
// Retrieve the pointer we gave them and mark it free again.
// A linear search is fine: we have only 4 elements to iterate through.
//
static void ReleaseMutableStyleStruct(nsStyleStructID aSID, nsStyleStruct* aStyleStruct)
{
short structType = aSID - 1;
for (short structIndex = 0; structIndex < kStructIndexMax; structIndex++) {
if (gStructPointer[structType][structIndex] == aStyleStruct) {
gStructBusy[structType][structIndex] = PR_FALSE;
return;
}
}
NS_ASSERTION(PR_FALSE, "Can't release mutable style struct");
}
//------------------------------------------------------------------------------
// ReadMutableStyleData
//------------------------------------------------------------------------------
// Receive a style structure and fill it up with the inherited style.
//
void StyleContextImpl::ReadMutableStyleData(nsStyleStructID aSID, nsStyleStruct** aStyleStructPtr)
{
NS_PRECONDITION(aSID > 0 && aSID <= eStyleStruct_Max, "Invalid style struct id");
#ifdef LOG_GET_STYLE_DATA_CALLS
LogGetStyleDataCall(aSID, logCallType_ReadMutableStyleData, this, PR_TRUE);
#endif
#ifdef LOG_STYLE_STRUCTS
mStyleData->mGotMutable[aSID] = PR_TRUE;
#endif
nsStyleStruct* result = GetNewMutableStyleStruct(aSID);
const StyleBlob* current = FetchInheritedStyleBlob(aSID);
current->CopyTo(result);
#if 0 // was there in the previous function that returned direct pointers to the style data
if (nsnull != result) {
if (0 == mDataCode) {
// mDataCode = ++gLastDataCode; // XXX temp disable, this is still used but not needed to force unique
}
}
#endif
#ifdef LOG_GET_STYLE_DATA_CALLS
LogGetStyleDataCall(aSID, logCallType_ReadMutableStyleData, this, PR_FALSE);
#endif
*aStyleStructPtr = result;
}
//------------------------------------------------------------------------------
// WriteStyleData
//------------------------------------------------------------------------------
// Basic function to write a style structure.
// Check whether the style is any different from the inherited style and if so,
// allocate a new blob (if needed) and copy the new style into it.
//
nsresult StyleContextImpl::WriteStyleData(nsStyleStructID aSID, const nsStyleStruct* aStyleStruct)
{
NS_PRECONDITION(aSID > 0 && aSID <= eStyleStruct_Max, "Invalid style struct id");
short index = aSID - 1;
const StyleBlob* current = FetchInheritedStyleBlob(aSID);
PRInt32 hint = current->CalcDifference(aStyleStruct);
if (hint != NS_STYLE_HINT_NONE) {
if (!BLOBARRAY[index]) {
BLOBARRAY[index] = mStyleData->AllocateOneBlob(aSID, nsnull);
if (!BLOBARRAY[index]) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
BLOBARRAY[index]->SetFrom(aStyleStruct);
}
return NS_OK;
}
//------------------------------------------------------------------------------
// WriteMutableStyleData
//------------------------------------------------------------------------------
// Write a style structure that was filled-up in ReadMutableStyleData and that
// might have been modified by the app.
//
nsresult StyleContextImpl::WriteMutableStyleData(nsStyleStructID aSID, nsStyleStruct* aStyleStruct)
{
NS_PRECONDITION(aSID > 0 && aSID <= eStyleStruct_Max, "Invalid style struct id");
#ifdef LOG_GET_STYLE_DATA_CALLS
LogGetStyleDataCall(aSID, logCallType_WriteMutableStyleData, this, PR_TRUE);
#endif
#ifdef LOG_WRITE_STYLE_DATA_CALLS
LogWriteMutableStyleDataCall(aSID, aStyleStruct, this);
#endif
WriteStyleData(aSID, aStyleStruct);
ReleaseMutableStyleStruct(aSID, aStyleStruct);
#ifdef LOG_GET_STYLE_DATA_CALLS
LogGetStyleDataCall(aSID, logCallType_WriteMutableStyleData, this, PR_FALSE);
#endif
return NS_OK;
}
//------------------------------------------------------------------------------
// CalcBorderPaddingFor
//------------------------------------------------------------------------------
//
void StyleContextImpl::CalcBorderPaddingFor(const nsIFrame* aFrame, nsMargin& aBorderPadding) const
{
nsMargin border, padding;
if (!GETDATA(Border)->GetBorder(border)) {
GETDATA(Border)->CalcBorderFor(aFrame, border);
}
if (!GETDATA(Padding)->GetPadding(padding)) {
GETDATA(Padding)->CalcPaddingFor(aFrame, padding);
}
aBorderPadding = border + padding;
}
//------------------------------------------------------------------------------
// GetStyle
//------------------------------------------------------------------------------
//
NS_IMETHODIMP
StyleContextImpl::GetStyle(nsStyleStructID aSID, nsStyleStruct& aStruct) const
{
#ifdef LOG_GET_STYLE_DATA_CALLS
LogGetStyleDataCall(aSID, logCallType_GetStyle, (nsIStyleContext*)this, PR_TRUE);
#endif
if (aSID == eStyleStruct_BorderPaddingShortcut) {
nsMargin border, padding;
PRBool hasBorder = GETDATA(Border)->GetBorder(border);
PRBool hasPadding = GETDATA(Padding)->GetPadding(padding);
if (hasBorder) {
if (hasPadding) {
border += padding;
}
((nsStyleBorderPadding&)aStruct).SetBorderPadding(border);
}
else {
if (hasPadding) {
((nsStyleBorderPadding&)aStruct).SetBorderPadding(padding);
}
}
}
else {
NS_PRECONDITION(aSID > 0 && aSID <= eStyleStruct_Max, "Invalid style struct id");
const StyleBlob* current = FetchInheritedStyleBlob(aSID);
current->CopyTo(&aStruct);
}
#ifdef LOG_GET_STYLE_DATA_CALLS
LogGetStyleDataCall(aSID, logCallType_GetStyle, (nsIStyleContext*)this, PR_FALSE);
#endif
return NS_OK;
}
//------------------------------------------------------------------------------
// RemapStyle rules and helpers
//------------------------------------------------------------------------------
//
struct MapStyleData {
MapStyleData(nsIMutableStyleContext* aStyleContext, nsIPresContext* aPresContext)
{
mStyleContext = aStyleContext;
mPresContext = aPresContext;
}
nsIMutableStyleContext* 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;
}
//--------------------------
// EnsureBlockDisplay
// In order to enforce the floated/positioned element CSS2 rules,
// if the display type is not a block-type then we set it to a
// valid block display type.
//
static void EnsureBlockDisplay(/*in out*/PRUint8 &display)
{
// see if the display value is already a block
switch (display) {
case NS_STYLE_DISPLAY_NONE :
// never change display:none *ever*
break;
case NS_STYLE_DISPLAY_TABLE :
case NS_STYLE_DISPLAY_BLOCK :
// do not muck with these at all - already blocks
break;
case NS_STYLE_DISPLAY_LIST_ITEM :
// do not change list items to blocks - retain the bullet/numbering
break;
case NS_STYLE_DISPLAY_TABLE_ROW_GROUP :
case NS_STYLE_DISPLAY_TABLE_COLUMN :
case NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP :
case NS_STYLE_DISPLAY_TABLE_HEADER_GROUP :
case NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP :
case NS_STYLE_DISPLAY_TABLE_ROW :
case NS_STYLE_DISPLAY_TABLE_CELL :
case NS_STYLE_DISPLAY_TABLE_CAPTION :
// special cases: don't do anything since these cannot really be floated anyway
break;
case NS_STYLE_DISPLAY_INLINE_TABLE :
// make inline tables into tables
display = NS_STYLE_DISPLAY_TABLE;
break;
default :
// make it a block
display = NS_STYLE_DISPLAY_BLOCK;
}
}
//------------------------------------------------------------------------------
// WrapRemapStyle
//------------------------------------------------------------------------------
// The way it works is...
// - When we enter RemapStyle(), we set the blob pointers that are null
// to point to the static blobs below. Then the app does all the
// remapping it wants, modifying as many of the style structs it needs.
// - When we exit RemapStyle(), we check whether each of the style structs are
// identical to our parent's. If it is, we set its blob to null (possibly
// deallocating the memory). If it is not, we keep it (possibly storing the
// data into a newly allocated blob).
//
nsresult StyleContextImpl::WrapRemapStyle(nsIPresContext* aPresContext, PRBool aEnterRemapStyle)
{
static STYLEBLOB(Font) sFont;
static STYLEBLOB(Color) sColor;
static STYLEBLOB(List) sList;
static STYLEBLOB(Position) sPosition;
static STYLEBLOB(Text) sText;
static STYLEBLOB(Display) sDisplay;
static STYLEBLOB(Table) sTable;
static STYLEBLOB(Content) sContent;
static STYLEBLOB(UserInterface) sUserInterface;
static STYLEBLOB(Print) sPrint;
static STYLEBLOB(Margin) sMargin;
static STYLEBLOB(Padding) sPadding;
static STYLEBLOB(Border) sBorder;
static STYLEBLOB(Outline) sOutline;
#ifdef INCLUDE_XUL
static STYLEBLOB(XUL) sXUL;
#endif
//#insert new style structs here#
static StyleBlob* sBlobPtr[eStyleStruct_Max];
static PRBool initialized = PR_FALSE;
if (!initialized) {
initialized = PR_TRUE;
for (short i = 0; i < eStyleStruct_Max; i ++) {
StyleBlob* blobPtr = nsnull;
switch (i + 1) {
case eStyleStruct_Font: blobPtr = &sFont; break;
case eStyleStruct_Color: blobPtr = &sColor; break;
case eStyleStruct_List: blobPtr = &sList; break;
case eStyleStruct_Position: blobPtr = &sPosition; break;
case eStyleStruct_Text: blobPtr = &sText; break;
case eStyleStruct_Display: blobPtr = &sDisplay; break;
case eStyleStruct_Table: blobPtr = &sTable; break;
case eStyleStruct_Content: blobPtr = &sContent; break;
case eStyleStruct_UserInterface: blobPtr = &sUserInterface; break;
case eStyleStruct_Print: blobPtr = &sPrint; break;
case eStyleStruct_Margin: blobPtr = &sMargin; break;
case eStyleStruct_Padding: blobPtr = &sPadding; break;
case eStyleStruct_Border: blobPtr = &sBorder; break;
case eStyleStruct_Outline: blobPtr = &sOutline; break;
#ifdef INCLUDE_XUL
case eStyleStruct_XUL: blobPtr = &sXUL; break;
#endif
//#insert new style structs here#
default:
NS_ERROR("Invalid style struct id");
break;
}
sBlobPtr[i] = blobPtr;
}
}
if (aEnterRemapStyle) {
//------------------------
// Entering RemapStyle()...
// Set the blob pointers that are null
// to point to the static blobs.
#ifdef DEBUG
if (mParent == nsnull) {
for (short i = 0; i < eStyleStruct_Max; i ++) {
if (BLOBARRAY[i] == nsnull) {
NS_ERROR("Parent context is null but style blob is not allocated");
break;
}
}
}
#endif
for (short i = 0; i < eStyleStruct_Max; i ++) {
if (!BLOBARRAY[i]) {
BLOBARRAY[i] = sBlobPtr[i];
}
nsStyleStructID structID = (nsStyleStructID)(i + 1);
const nsStyleStruct* parentStyle = nsnull;
if (mParent) {
parentStyle = mParent->FetchInheritedStyleStruct(structID);
}
BLOBARRAY[i]->ResetFrom(parentStyle, aPresContext);
}
}
else {
//------------------------
// Exiting RemapStyle()...
// Check whether each of our style structs are identical to our parent's.
// If it is, we set its blob to null (possibly deallocating the memory).
// If it is not, we keep it (possibly storing the data into a newly allocated blob).
if (mParent != nsnull) {
PRInt32 hint;
for (short i = 0; i < eStyleStruct_Max; i ++) {
nsStyleStructID structID = (nsStyleStructID)(i + 1);
hint = BLOBARRAY[i]->CalcDifference(mParent->FetchInheritedStyleStruct(structID));
if (hint == NS_STYLE_HINT_NONE) {
if (BLOBARRAY[i] == sBlobPtr[i]) {
BLOBARRAY[i] = nsnull;
}
else {
NS_IF_DELETE(BLOBARRAY[i]);
}
}
else {
if (BLOBARRAY[i] == sBlobPtr[i]) {
BLOBARRAY[i] = mStyleData->AllocateOneBlob(structID, nsnull);
if (!BLOBARRAY[i]) {
return NS_ERROR_OUT_OF_MEMORY;
}
BLOBARRAY[i]->SetFrom(sBlobPtr[i]->GetData());
}
}
}
}
}
return NS_OK;
}
//------------------------------------------------------------------------------
// RemapStyle
//------------------------------------------------------------------------------
//
NS_IMETHODIMP
StyleContextImpl::RemapStyle(nsIPresContext* aPresContext, PRBool aRecurse)
{
mDataCode = -1;
if (NS_FAILED(EnsureStyleData(aPresContext))) {
return NS_ERROR_UNEXPECTED;
}
//------------------------
// Memory allocation
WrapRemapStyle(aPresContext, PR_TRUE); // Use a temporary set of blobs while we remap style
//------------------------
// Normal style remapping
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);
if (GETDATAPTR(Font)->mFlags & NS_STYLE_FONT_USE_FIXED) {
GETMUTABLEDATAPTR(Font)->mFont = GETDATAPTR(Font)->mFixedFont;
}
mRules->EnumerateForwards(MapStyleRule, &data);
}
if (-1 == mDataCode) {
mDataCode = 0;
}
//------------------------
// CSS2 specified fixups:
// - these must be done after all declarations are mapped since they can cross style-structs
// #1 if float is not none, and display is not none, then we must set display to block
// XXX - there are problems with following the spec here: what we will do instead of
// following the letter of the spec is to make sure that floated elements are
// some kind of block, not strictly 'block' - see EnsureBlockDisplay method
PRUint8 oldDisplay = GETDATAPTR(Display)->mDisplay;
PRUint8 oldFloats = GETDATAPTR(Display)->mFloats;
PRUint8 newDisplay = oldDisplay;
PRUint8 newFloats = oldFloats;
if (newDisplay != NS_STYLE_DISPLAY_NONE && newFloats != NS_STYLE_FLOAT_NONE ) {
EnsureBlockDisplay(newDisplay);
}
// #2 if position is 'absolute' or 'fixed' then display must be 'block and float must be 'none'
// XXX - see note for fixup #1 above...
if (GETDATAPTR(Position)->IsAbsolutelyPositioned()) {
if (newDisplay != NS_STYLE_DISPLAY_NONE) {
EnsureBlockDisplay(newDisplay);
newFloats = NS_STYLE_FLOAT_NONE;
}
}
if (newDisplay != oldDisplay || newFloats != oldFloats) {
nsMutableStyleDisplay display((nsIStyleContext*)this);
if (newDisplay != oldDisplay) {
display->mDisplay = newDisplay;
}
if (newFloats != oldFloats) {
display->mFloats = newFloats;
}
}
//------------------------
// Table style remapping
PRUint8 displayType = GETDATAPTR(Display)->mDisplay;
nsCompatibility quirkMode = eCompatibility_Standard;
aPresContext->GetCompatibilityMode(&quirkMode);
if (eCompatibility_NavQuirks == quirkMode) {
if (((displayType == NS_STYLE_DISPLAY_TABLE) ||
(displayType == NS_STYLE_DISPLAY_TABLE_CAPTION)) &&
(nsnull == mPseudoTag)) {
// 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
// XXX the style we do preserve is visibility, direction, language
PRUint8 visible = GETDATAPTR(Display)->mVisible;
PRUint8 direction = GETDATAPTR(Display)->mDirection;
nsCOMPtr<nsILanguageAtom> language = GETDATAPTR(Display)->mLanguage;
// cut off all inheritance. this really blows
StyleContextImpl* holdParent = mParent;
mParent = nsnull;
// NOTE: We cut off the inheritance but we don't need to allocate the blobs
// that were inherited from the parent because we are inside RemapStyle(),
// meaning that we have all the blobs already.
// Reset the blobs to default style
for (short i = 0; i < eStyleStruct_Max; i ++) {
nsStyleStructID structID = (nsStyleStructID)(i + 1);
if (BLOBARRAY[i]) {
if ((structID == eStyleStruct_Font) && (displayType == NS_STYLE_DISPLAY_TABLE)) {
// Inherit the font struct from the parent (tables only, not table captions)...
const nsStyleStruct* parentStyle = nsnull;
if (holdParent) {
parentStyle = holdParent->FetchInheritedStyleStruct(structID);
}
BLOBARRAY[i]->ResetFrom(parentStyle, aPresContext);
}
else {
// ... But reset all the other blobs
BLOBARRAY[i]->ResetFrom(nsnull, aPresContext);
}
}
}
// Restore the style we preserved
GETMUTABLEDATAPTR(Display)->mVisible = visible;
GETMUTABLEDATAPTR(Display)->mDirection = direction;
GETMUTABLEDATAPTR(Display)->mLanguage = language;
// Do the normal style remapping all over again
PRUint32 numRules = 0;
if (mRules) {
nsresult rv = mRules->Count(&numRules);
NS_ASSERTION(NS_SUCCEEDED(rv), "Count failed");
}
if (0 < numRules) {
MapStyleData data(this, aPresContext);
mRules->EnumerateForwards(MapStyleRuleFont, &data);
if (GETDATAPTR(Font)->mFlags & NS_STYLE_FONT_USE_FIXED) {
GETMUTABLEDATAPTR(Font)->mFont = GETDATAPTR(Font)->mFixedFont;
}
mRules->EnumerateForwards(MapStyleRule, &data);
}
// reset all font data for tables again
if (GETDATAPTR(Display)->mDisplay == NS_STYLE_DISPLAY_TABLE) {
// get the font-name to reset: this property we preserve
nsAutoString strName(GETDATAPTR(Font)->mFont.name);
nsAutoString strFixedName(GETDATAPTR(Font)->mFixedFont.name);
short index = eStyleStruct_Font - 1;
BLOBARRAY[index]->ResetFrom(nsnull, aPresContext);
// now reset the font names back to original
GETMUTABLEDATAPTR(Font)->mFont.name = strName;
GETMUTABLEDATAPTR(Font)->mFixedFont.name = strFixedName;
}
mParent = holdParent;
}
} else {
// In strict mode, we still have to support one "quirky" thing
// for tables. HTML's alignment attributes have always worked
// so they don't inherit into tables, but instead align the
// tables. We should keep doing this, because HTML alignment
// is just weird, and we shouldn't force it to match CSS.
if (displayType == NS_STYLE_DISPLAY_TABLE) {
// -moz-center and -moz-right are used for HTML's alignment
if ((GETDATAPTR(Text)->mTextAlign == NS_STYLE_TEXT_ALIGN_MOZ_CENTER) ||
(GETDATAPTR(Text)->mTextAlign == NS_STYLE_TEXT_ALIGN_MOZ_RIGHT))
{
GETMUTABLEDATAPTR(Text)->mTextAlign = NS_STYLE_TEXT_ALIGN_DEFAULT;
}
}
}
RecalcAutomaticData(aPresContext);
//------------------------
// Memory deallocation
WrapRemapStyle(aPresContext, PR_FALSE); // Keep the blobs that have changed and dump the rest.
// Must be called before we recurse.
//------------------------
// Context is mapped, share it if we can
#ifdef SHARE_STYLECONTEXTS
nsresult result = ShareStyleData();
#endif
//------------------------
// Recurse through children
if (aRecurse) {
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;
}
//------------------------------------------------------------------------------
// ForceUnique
//------------------------------------------------------------------------------
//
void StyleContextImpl::ForceUnique(void)
{
if (mDataCode <= 0) {
mDataCode = ++gLastDataCode;
}
}
//------------------------------------------------------------------------------
// RecalcAutomaticData
//------------------------------------------------------------------------------
//
void StyleContextImpl::RecalcAutomaticData(nsIPresContext* aPresContext)
{
if (NS_FAILED(EnsureStyleData(aPresContext))) {
return /*NS_FAILURE*/;
}
GETBLOB(Margin)->RecalcData();
GETBLOB(Padding)->RecalcData();
GETBLOB(Border)->RecalcData(GETDATA(Color)->mColor);
GETBLOB(Outline)->RecalcData();
}
//------------------------------------------------------------------------------
// CalcStyleDifference
//------------------------------------------------------------------------------
//
NS_IMETHODIMP
StyleContextImpl::CalcStyleDifference(nsIStyleContext* aOther, PRInt32& aHint,PRBool aStopAtFirstDifference /*= PR_FALSE*/) const
{
if (NS_FAILED(HaveStyleData())) {
return NS_ERROR_NULL_POINTER;
}
if (aOther) {
PRInt32 hint = aHint = NS_STYLE_HINT_NONE;
const StyleContextImpl* otherContext = (const StyleContextImpl*)aOther;
for (short i = 0; i < eStyleStruct_Max; i ++) {
nsStyleStructID structID = (nsStyleStructID)(i + 1);
const StyleBlob* myStyle = FetchInheritedStyleBlob(structID);
hint = myStyle->CalcDifference(otherContext->FetchInheritedStyleStruct(structID));
if (aHint < hint) {
aHint = hint;
}
if ((aStopAtFirstDifference && (aHint > NS_STYLE_HINT_NONE)) || (aHint == NS_STYLE_HINT_MAX)) {
return NS_OK;
}
}
}
return NS_OK;
}
//------------------------------------------------------------------------------
// EnsureStyleData
//------------------------------------------------------------------------------
//
nsresult StyleContextImpl::EnsureStyleData(nsIPresContext* aPresContext)
{
nsresult rv = NS_OK;
NS_ASSERTION(aPresContext, "null presContext argument is illegal and immoral");
if (nsnull == aPresContext) {
// no pres context provided, and we have no style data, so send back an error
return NS_ERROR_FAILURE;
}
// See if we already have data...
if (NS_FAILED(HaveStyleData())) {
// we were provided a pres context so create a new style data
#ifdef SHARE_STYLECONTEXTS
mStyleData = nsStyleContextData::Create(this, aPresContext);
#else
mStyleData = &mStyleDataImpl;
if (NS_FAILED(mStyleData->AllocateStyleBlobs(this, aPresContext))) {
mStyleData = nsnull;
}
#endif
if (nsnull == mStyleData) {
rv = NS_ERROR_OUT_OF_MEMORY;
}
}
return rv;
}
//------------------------------------------------------------------------------
// HaveStyleData
//------------------------------------------------------------------------------
//
nsresult StyleContextImpl::HaveStyleData(void) const
{
return (nsnull == mStyleData) ? NS_ERROR_NULL_POINTER : NS_OK;
}
//------------------------------------------------------------------------------
// ShareStyleData
//------------------------------------------------------------------------------
//
#ifdef SHARE_STYLECONTEXTS
nsresult StyleContextImpl::ShareStyleData(void)
{
nsresult result = NS_OK;
// Enable flag: this is TRUE by default, however the env. var. moz_disable_style_sharing
// can be set to '1' to disable the sharing before the app is launched
static char *disableSharing = PR_GetEnv("moz_disable_style_sharing");
static PRBool isSharingEnabled = (disableSharing == nsnull) ||
(*disableSharing != '1');
#ifdef DEBUG
static PRBool bOnce = PR_FALSE;
if(!bOnce){
printf( "Style Data Sharing is %s\n", isSharingEnabled ? "Enabled :)" : "Disabled :(" );
bOnce = PR_TRUE;
}
#endif
PRBool isSharingSupported = CanShareStyleData(this);
if (isSharingEnabled && isSharingSupported) {
NS_ASSERTION(mStyleSet, "Expected to have a style set ref...");
nsIStyleContext *matchingSC = nsnull;
// save the old crc before replacing it
PRUint32 oldCRC = mStyleData->GetCRC32();
// set the CRC based on the new data, and retrieve the new value
mStyleData->SetCRC32();
PRUint32 newCRC = mStyleData->GetCRC32();
// if the crc was previously set AND it has changed, notify the styleset
if((oldCRC != STYLEDATA_NO_CRC)&&
(oldCRC != newCRC)) {
result = mStyleSet->UpdateStyleContextKey(oldCRC, newCRC);
#ifdef NOISY_DEBUG
printf("CRC changed on context: updating from %ld to %ld\n", oldCRC, newCRC);
#endif
if(NS_FAILED(result)) {
return result;
}
}
// check if there is a matching context...
result = mStyleSet->FindMatchingContext(this, &matchingSC);
if ((NS_SUCCEEDED(result)) &&
(nsnull != matchingSC)) {
ShareStyleDataFrom(matchingSC);
#ifdef NOISY_DEBUG
printf("SC Data Shared :)\n");
#endif
NS_IF_RELEASE(matchingSC);
} else {
#ifdef NOISY_DEBUG
printf("Unique SC Data - Not Shared :(\n");
#endif
}
}
return result;
}
#endif // SHARE_STYLECONTEXTS
//------------------------------------------------------------------------------
// ShareStyleDataFrom
//------------------------------------------------------------------------------
//
#ifdef SHARE_STYLECONTEXTS
nsresult StyleContextImpl::ShareStyleDataFrom(nsIStyleContext*aStyleDataDonor)
{
nsresult rv = NS_OK;
if (aStyleDataDonor) {
// XXX - static cast is nasty, especially if there are multiple
// nsIStyleContext implementors...
StyleContextImpl *donor = NS_STATIC_CAST(StyleContextImpl*,aStyleDataDonor);
// get the data from the donor
nsStyleContextData *pData = donor->mStyleData;
if (pData != nsnull) {
NS_ADDREF(pData);
NS_IF_RELEASE(mStyleData);
mStyleData = pData;
}
}
return rv;
}
#endif // SHARE_STYLECONTEXTS
//------------------------------------------------------------------------------
// StyleDataMatches
//------------------------------------------------------------------------------
//
#ifdef SHARE_STYLECONTEXTS
#ifdef DEBUG
long gFalsePos=0;
long gScreenedByCRC=0;
#endif
NS_IMETHODIMP
StyleContextImpl::StyleDataMatches(nsIStyleContext* aStyleContextToMatch,
PRBool *aMatches)
{
NS_ASSERTION((aStyleContextToMatch != nsnull) &&
(aStyleContextToMatch != this) &&
(aMatches != nsnull), "invalid parameter");
nsresult rv = NS_OK;
// XXX - static cast is nasty, especially if there are multiple
// nsIStyleContext implementors...
StyleContextImpl* other = NS_STATIC_CAST(StyleContextImpl*,aStyleContextToMatch);
*aMatches = PR_FALSE;
// check same pointer value
if (other->mStyleData != mStyleData) {
// check using the crc first:
// this will get past the vast majority which do not match,
// and if it does match then we'll double check with the more complete comparison
if (other->mStyleData->GetCRC32() == mStyleData->GetCRC32()) {
// Might match: validate using the more comprehensive (and slower) CalcStyleDifference
PRInt32 hint = 0;
CalcStyleDifference(aStyleContextToMatch, hint, PR_TRUE);
#ifdef DEBUG
if (hint > 0) {
gFalsePos++;
// printf("CRC match but CalcStyleDifference shows differences: crc is not sufficient?");
}
#endif
*aMatches = (0 == hint) ? PR_TRUE : PR_FALSE;
}
#ifdef DEBUG
else
{
// in DEBUG we make sure we are not missing any by getting false-negatives on the CRC
// XXX NOTE: this should be removed when we trust the CRC matching
// as this slows it way down
gScreenedByCRC++;
/*
PRInt32 hint = 0;
CalcStyleDifference(aStyleContextToMatch, hint, PR_TRUE);
NS_ASSERTION(hint>0,"!!!FALSE-NEGATIVE in StyleMatchesData!!!");
*/
}
// printf("False-Pos: %ld - Screened: %ld\n", gFalsePos, gScreenedByCRC);
#endif
}
return rv;
}
#endif // SHARE_STYLECONTEXTS
//------------------------------------------------------------------------------
// GetStyleContextKey
//------------------------------------------------------------------------------
//
#ifdef SHARE_STYLECONTEXTS
NS_IMETHODIMP StyleContextImpl::GetStyleContextKey(scKey &aKey) const
{
aKey = mStyleData->GetCRC32();
return NS_OK;
}
#endif // SHARE_STYLECONTEXTS
//------------------------------------------------------------------------------
// UpdateStyleSetCache
//------------------------------------------------------------------------------
//
#ifdef SHARE_STYLECONTEXTS
nsresult StyleContextImpl::UpdateStyleSetCache( void ) const
{
if (mStyleSet) {
// add it to the set: the set does NOT addref or release
return mStyleSet->AddStyleContext((nsIStyleContext *)this);
} else {
return NS_ERROR_FAILURE;
}
}
#endif // SHARE_STYLECONTEXTS
//------------------------------------------------------------------------------
// Regression tests (List, SizeOf, DumpRegressionData)
//------------------------------------------------------------------------------
//
void StyleContextImpl::List(FILE* out, PRInt32 aIndent)
{
// Indent
PRInt32 ix;
for (ix = aIndent; --ix >= 0; ) fputs(" ", out);
fprintf(out, "%p(%d) ", (void*)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 (ix = 0; ix < count; ix++) {
nsIStyleRule* rule = (nsIStyleRule*)mRules->ElementAt(ix);
rule->List(out, aIndent + 1);
NS_RELEASE(rule);
}
for (ix = aIndent; --ix >= 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);
}
}
/******************************************************************************
* SizeOf method:
*
* Self (reported as StyleContextImpl's size):
* 1) sizeof(*this) which gets all of the data members
* 2) adds in the size of the PseudoTag, if there is one
*
* Contained / Aggregated data (not reported as StyleContextImpl's size):
* 1) the Style Rules in mRules are not counted as part of sizeof(*this)
* (though the size of the nsISupportsArray ptr. is) so we need to
* count the rules seperately. For each rule in the mRules collection
* we call the SizeOf method and let it report itself.
*
* Children / siblings / parents:
* 1) We recurse over the mChild and mEmptyChild instances if they exist.
* These instances will then be accumulated seperately (not part of
* the containing instance's size)
* 2) We recurse over the siblings of the Child and Empty Child instances
* and count then seperately as well.
* 3) We recurse over our direct siblings (if any).
*
******************************************************************************/
void StyleContextImpl::SizeOf(nsISizeOfHandler *aSizeOfHandler, PRUint32 &aSize)
{
NS_ASSERTION(aSizeOfHandler != nsnull, "SizeOf handler cannot be null");
static PRBool bDetailDumpDone = PR_FALSE;
if (!bDetailDumpDone) {
bDetailDumpDone = PR_TRUE;
struct sizeInfo {
char* name;
long size;
};
static sizeInfo styleDataInfo[eStyleStruct_Max] = {
{"StyleFontBlob", sizeof(STYLEBLOB(Font))}
,{"StyleColorBlob", sizeof(STYLEBLOB(Color))}
,{"StyleListBlob", sizeof(STYLEBLOB(List))}
,{"StylePositionBlob", sizeof(STYLEBLOB(Position))}
,{"StyleTextBlob", sizeof(STYLEBLOB(Text))}
,{"StyleDisplayBlob", sizeof(STYLEBLOB(Display))}
,{"StyleTableBlob", sizeof(STYLEBLOB(Table))}
,{"StyleContentBlob", sizeof(STYLEBLOB(Content))}
,{"StyleUserInterfaceBlob", sizeof(STYLEBLOB(UserInterface))}
,{"StylePrintBlob", sizeof(STYLEBLOB(Print))}
,{"StyleMarginBlob", sizeof(STYLEBLOB(Margin))}
,{"StylePaddingBlob", sizeof(STYLEBLOB(Padding))}
,{"StyleBorderBlob", sizeof(STYLEBLOB(Border))}
,{"StyleOutlineBlob", sizeof(STYLEBLOB(Outline))}
#ifdef INCLUDE_XUL
,{"StyleXULBlob", sizeof(STYLEBLOB(XUL))}
#endif
//#insert new style structs here#
};
printf("Detailed StyleContextImpl dump: basic class sizes of members\n" );
printf("*************************************\n");
PRUint32 totalSize=0;
for (short i = 0; i < eStyleStruct_Max; i ++) {
printf(" - %-24s %ld\n", styleDataInfo[i].name, styleDataInfo[i].size);
totalSize += styleDataInfo[i].size;
}
printf(" - %-24s %ld\n", "Total", totalSize);
printf( "*************************************\n");
}
// first get the unique items collection
UNIQUE_STYLE_ITEMS(uniqueItems);
if(! uniqueItems->AddItem((void*)this) ){
// object has already been accounted for
return;
}
PRUint32 localSize=0;
// get or create a tag for this instance
nsCOMPtr<nsIAtom> tag;
tag = getter_AddRefs(NS_NewAtom("StyleContextImpl"));
// get the size of an empty instance and add to the sizeof handler
aSize = sizeof(*this);
#ifndef SHARE_STYLECONTEXTS
aSize -= sizeof(this->mStyleDataImpl);
#endif
// add in the size of the member mPseudoTag
if(mPseudoTag){
mPseudoTag->SizeOf(aSizeOfHandler, &localSize);
aSize += localSize;
}
aSizeOfHandler->AddSize(tag,aSize);
// count the style data seperately
if (mStyleData) {
mStyleData->SizeOf(aSizeOfHandler,localSize);
}
// size up the rules (if not already done)
// XXX - overhead of the collection???
if(mRules && uniqueItems->AddItem(mRules)){
PRUint32 curRule, ruleCount;
mRules->Count(&ruleCount);
if (ruleCount > 0) {
for (curRule = 0; curRule < ruleCount; curRule++) {
nsIStyleRule* rule = (nsIStyleRule*)mRules->ElementAt(curRule);
NS_ASSERTION(rule, "null entry in Rules list is bad news");
rule->SizeOf(aSizeOfHandler, localSize);
NS_RELEASE(rule);
}
}
}
// now follow up with the child (and empty child) recursion
if (nsnull != mChild) {
StyleContextImpl* child = mChild;
do {
child->SizeOf(aSizeOfHandler, localSize);
child = child->mNextSibling;
} while (mChild != child);
}
if (nsnull != mEmptyChild) {
StyleContextImpl* child = mEmptyChild;
do {
child->SizeOf(aSizeOfHandler, localSize);
child = child->mNextSibling;
} while (mEmptyChild != child);
}
// and finally our direct siblings (if any)
if (nsnull != mNextSibling) {
mNextSibling->SizeOf(aSizeOfHandler, localSize);
}
}
#ifdef DEBUG
static void IndentBy(FILE* out, PRInt32 aIndent) {
while (--aIndent >= 0) fputs(" ", out);
}
// virtual
void StyleContextImpl::DumpRegressionData(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent)
{
nsAutoString str;
// FONT
IndentBy(out,aIndent);
fprintf(out, "<font %s %s %d />\n",
NS_ConvertUCS2toUTF8(GETDATA(Font)->mFont.name).get(),
NS_ConvertUCS2toUTF8(GETDATA(Font)->mFixedFont.name).get(),
GETDATA(Font)->mFlags);
// COLOR
IndentBy(out,aIndent);
fprintf(out, "<color data=\"%ld %d %d %d %ld %ld %ld %s %d %s %f\"/>\n",
(long)GETDATA(Color)->mColor,
(int)GETDATA(Color)->mBackgroundAttachment,
(int)GETDATA(Color)->mBackgroundFlags,
(int)GETDATA(Color)->mBackgroundRepeat,
(long)GETDATA(Color)->mBackgroundColor,
(long)GETDATA(Color)->mBackgroundXPosition,
(long)GETDATA(Color)->mBackgroundYPosition,
NS_ConvertUCS2toUTF8(GETDATA(Color)->mBackgroundImage).get(),
(int)GETDATA(Color)->mCursor,
NS_ConvertUCS2toUTF8(GETDATA(Color)->mCursorImage).get(),
GETDATA(Color)->mOpacity);
// SPACING (ie. margin, padding, border, outline)
IndentBy(out,aIndent);
fprintf(out, "<spacing data=\"");
GETDATA(Margin)->mMargin.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Padding)->mPadding.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Border)->mBorder.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Border)->mBorderRadius.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Outline)->mOutlineRadius.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Outline)->mOutlineWidth.ToString(str);
fprintf(out, "%s", NS_ConvertUCS2toUTF8(str).get());
fprintf(out, "%d", (int)GETDATA(Border)->mFloatEdge);
fprintf(out, "\" />\n");
// LIST
IndentBy(out,aIndent);
fprintf(out, "<list data=\"%d %d %s\" />\n",
(int)GETDATA(List)->mListStyleType,
(int)GETDATA(List)->mListStyleType,
NS_ConvertUCS2toUTF8(GETDATA(List)->mListStyleImage).get());
// POSITION
IndentBy(out,aIndent);
fprintf(out, "<position data=\"%d ", (int)GETDATA(Position)->mPosition);
GETDATA(Position)->mOffset.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Position)->mWidth.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Position)->mMinWidth.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Position)->mMaxWidth.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Position)->mHeight.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Position)->mMinHeight.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Position)->mMaxHeight.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
fprintf(out, "%d ", (int)GETDATA(Position)->mBoxSizing);
GETDATA(Position)->mZIndex.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
fprintf(out, "\" />\n");
// TEXT
IndentBy(out,aIndent);
fprintf(out, "<text data=\"%d %d %d %d ",
(int)GETDATA(Text)->mTextAlign,
(int)GETDATA(Text)->mTextDecoration,
(int)GETDATA(Text)->mTextTransform,
(int)GETDATA(Text)->mWhiteSpace);
GETDATA(Text)->mLetterSpacing.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Text)->mLineHeight.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Text)->mTextIndent.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Text)->mWordSpacing.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Text)->mVerticalAlign.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
fprintf(out, "\" />\n");
// DISPLAY
IndentBy(out,aIndent);
fprintf(out, "<display data=\"%d %d %d %d %d %d %d %d %d %ld %ld %ld %ld\" />\n",
(int)GETDATA(Display)->mDirection,
(int)GETDATA(Display)->mDisplay,
(int)GETDATA(Display)->mFloats,
(int)GETDATA(Display)->mBreakType,
(int)GETDATA(Display)->mBreakBefore,
(int)GETDATA(Display)->mBreakAfter,
(int)GETDATA(Display)->mVisible,
(int)GETDATA(Display)->mOverflow,
(int)GETDATA(Display)->mClipFlags,
(long)GETDATA(Display)->mClip.x,
(long)GETDATA(Display)->mClip.y,
(long)GETDATA(Display)->mClip.width,
(long)GETDATA(Display)->mClip.height
);
// TABLE
IndentBy(out,aIndent);
fprintf(out, "<table data=\"%d %d %d %d ",
(int)GETDATA(Table)->mLayoutStrategy,
(int)GETDATA(Table)->mFrame,
(int)GETDATA(Table)->mRules,
(int)GETDATA(Table)->mBorderCollapse);
GETDATA(Table)->mBorderSpacingX.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Table)->mBorderSpacingY.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
GETDATA(Table)->mCellPadding.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
fprintf(out, "%d %d %ld %ld ",
(int)GETDATA(Table)->mCaptionSide,
(int)GETDATA(Table)->mEmptyCells,
(long)GETDATA(Table)->mCols,
(long)GETDATA(Table)->mSpan);
GETDATA(Table)->mSpanWidth.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
fprintf(out, "\" />\n");
// CONTENT
IndentBy(out,aIndent);
fprintf(out, "<content data=\"%ld %ld %ld %ld ",
(long)GETDATA(Content)->ContentCount(),
(long)GETDATA(Content)->CounterIncrementCount(),
(long)GETDATA(Content)->CounterResetCount(),
(long)GETDATA(Content)->QuotesCount());
// XXX: iterate over the content, counters and quotes...
GETDATA(Content)->mMarkerOffset.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
fprintf(out, "\" />\n");
// UI
IndentBy(out,aIndent);
fprintf(out, "<UI data=\"%d %d %d %d %d %d %s\" />\n",
(int)GETDATA(UserInterface)->mUserInput,
(int)GETDATA(UserInterface)->mUserModify,
(int)GETDATA(UserInterface)->mUserSelect,
(int)GETDATA(UserInterface)->mUserFocus,
(int)GETDATA(UserInterface)->mKeyEquivalent,
(int)GETDATA(UserInterface)->mResizer,
NS_ConvertUCS2toUTF8(GETDATA(UserInterface)->mBehavior).get());
// PRINT
IndentBy(out,aIndent);
fprintf(out, "<print data=\"%d %d %d %s %ld %ld %d ",
(int)GETDATA(Print)->mPageBreakBefore,
(int)GETDATA(Print)->mPageBreakAfter,
(int)GETDATA(Print)->mPageBreakInside,
NS_ConvertUCS2toUTF8(GETDATA(Print)->mPage).get(),
(long)GETDATA(Print)->mWidows,
(long)GETDATA(Print)->mOrphans,
(int)GETDATA(Print)->mMarks);
GETDATA(Print)->mSizeWidth.ToString(str);
fprintf(out, "%s ", NS_ConvertUCS2toUTF8(str).get());
fprintf(out, "\" />\n");
// XUL
#ifdef INCLUDE_XUL
IndentBy(out,aIndent);
fprintf(out, "<xul data=\"%d",
(int)GETDATA(XUL)->mBoxOrient);
fprintf(out, "\" />\n");
#endif
//#insert new style structs here#
}
#endif
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;
}
nsresult result = context->QueryInterface(NS_GET_IID(nsIStyleContext), (void **) aInstancePtrResult);
context->RemapStyle(aPresContext); // remap after initial ref-count is set
#ifdef SHARE_STYLECONTEXTS
context->UpdateStyleSetCache(); // add it to the style set cache now that the CRC is set
#endif
return result;
}
//------------------------------------------------------------------------------
// CRC Calculations
//------------------------------------------------------------------------------
//
#ifdef COMPUTE_STYLEDATA_CRC
/*************************************************************************
* The table lookup technique was adapted from the algorithm described *
* by Avram Perez, Byte-wise CRC Calculations, IEEE Micro 3, 40 (1983). *
*************************************************************************/
#define POLYNOMIAL 0x04c11db7L
static PRBool crc_table_initialized;
static PRUint32 crc_table[256];
void gen_crc_table() {
/* generate the table of CRC remainders for all possible bytes */
int i, j;
PRUint32 crc_accum;
for ( i = 0; i < 256; i++ ) {
crc_accum = ( (unsigned long) i << 24 );
for ( j = 0; j < 8; j++ ) {
if ( crc_accum & 0x80000000L )
crc_accum = ( crc_accum << 1 ) ^ POLYNOMIAL;
else crc_accum = ( crc_accum << 1 );
}
crc_table[i] = crc_accum;
}
return;
}
PRUint32 AccumulateCRC(PRUint32 crc_accum, const char *data_blk_ptr, int data_blk_size) {
if (!crc_table_initialized) {
gen_crc_table();
crc_table_initialized = PR_TRUE;
}
/* update the CRC on the data block one byte at a time */
int i, j;
for ( j = 0; j < data_blk_size; j++ ) {
i = ( (int) ( crc_accum >> 24) ^ *data_blk_ptr++ ) & 0xff;
crc_accum = ( crc_accum << 8 ) ^ crc_table[i];
}
return crc_accum;
}
PRUint32 StyleSideCRC(PRUint32 aCrc,const nsStyleSides *aStyleSides)
{
PRUint32 crc = aCrc;
nsStyleCoord theCoord;
aStyleSides->GetLeft(theCoord);
crc = StyleCoordCRC(crc,&theCoord);
aStyleSides->GetTop(theCoord);
crc = StyleCoordCRC(crc,&theCoord);
aStyleSides->GetRight(theCoord);
crc = StyleCoordCRC(crc,&theCoord);
aStyleSides->GetBottom(theCoord);
crc = StyleCoordCRC(crc,&theCoord);
return crc;
}
PRUint32 StyleCoordCRC(PRUint32 aCrc, const nsStyleCoord* aCoord)
{
PRUint32 crc = aCrc;
crc = AccumulateCRC(crc,(const char *)&aCoord->mUnit,sizeof(aCoord->mUnit));
// using the mInt part of the union below (float and PRInt32 should be the same size...)
crc = AccumulateCRC(crc,(const char *)&aCoord->mValue.mInt,sizeof(aCoord->mValue.mInt));
return crc;
}
PRUint32 StyleMarginCRC(PRUint32 aCrc, const nsMargin *aMargin)
{
PRUint32 crc = aCrc;
crc = AccumulateCRC(crc,(const char *)&aMargin->left,sizeof(aMargin->left));
crc = AccumulateCRC(crc,(const char *)&aMargin->top,sizeof(aMargin->top));
crc = AccumulateCRC(crc,(const char *)&aMargin->right,sizeof(aMargin->right));
crc = AccumulateCRC(crc,(const char *)&aMargin->bottom,sizeof(aMargin->bottom));
return crc;
}
PRUint32 StyleStringCRC(PRUint32 aCrc, const nsString *aString)
{
PRUint32 crc = aCrc;
PRUint32 len = aString->Length();
const PRUnichar *p = aString->GetUnicode();
if (p) {
crc = AccumulateCRC(crc,(const char *)p,(len*2));
}
crc = AccumulateCRC(crc,(const char *)&len,sizeof(len));
return crc;
}
#endif // #ifdef COMPUTE_STYLEDATA_CRC
#ifdef DEBUG //xxx pierre
#include "nsStyleContextDebug.cpp"
#endif
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