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gecko/layout/style/nsStyleStruct.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* David Hyatt (hyatt@netscape.com)
* Mats Palmgren <mats.palmgren@bredband.net>
* Michael Ventnor <m.ventnor@gmail.com>
* Jonathon Jongsma <jonathon.jongsma@collabora.co.uk>, Collabora Ltd.
* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* structs that contain the data provided by nsStyleContext, the
* internal API for computed style data for an element
*/
#include "nsStyleStruct.h"
#include "nsStyleStructInlines.h"
#include "nsStyleConsts.h"
#include "nsThemeConstants.h"
#include "nsString.h"
#include "nsPresContext.h"
#include "nsIDeviceContext.h"
#include "nsIWidget.h"
#include "nsIStyleRule.h"
#include "nsCRT.h"
#include "nsCSSProps.h"
#include "nsCOMPtr.h"
#include "nsIFrame.h"
#include "nsHTMLReflowState.h"
#include "prenv.h"
#include "nsSVGUtils.h"
#include "nsBidiUtils.h"
#include "imgIRequest.h"
#include "imgIContainer.h"
#include "prlog.h"
// Make sure we have enough bits in NS_STYLE_INHERIT_MASK.
PR_STATIC_ASSERT((((1 << nsStyleStructID_Length) - 1) &
~(NS_STYLE_INHERIT_MASK)) == 0);
inline PRBool IsFixedUnit(const nsStyleCoord& aCoord, PRBool aEnumOK)
{
return aCoord.ConvertsToLength() ||
(aEnumOK && aCoord.GetUnit() == eStyleUnit_Enumerated);
}
static PRBool EqualURIs(nsIURI *aURI1, nsIURI *aURI2)
{
PRBool eq;
return aURI1 == aURI2 || // handle null==null, and optimize
(aURI1 && aURI2 &&
NS_SUCCEEDED(aURI1->Equals(aURI2, &eq)) && // not equal on fail
eq);
}
static PRBool EqualURIs(nsCSSValue::URL *aURI1, nsCSSValue::URL *aURI2)
{
return aURI1 == aURI2 || // handle null==null, and optimize
(aURI1 && aURI2 && aURI1->URIEquals(*aURI2));
}
static PRBool EqualImages(imgIRequest *aImage1, imgIRequest* aImage2)
{
if (aImage1 == aImage2) {
return PR_TRUE;
}
if (!aImage1 || !aImage2) {
return PR_FALSE;
}
nsCOMPtr<nsIURI> uri1, uri2;
aImage1->GetURI(getter_AddRefs(uri1));
aImage2->GetURI(getter_AddRefs(uri2));
return EqualURIs(uri1, uri2);
}
static nsChangeHint CalcShadowDifference(nsCSSShadowArray* lhs,
nsCSSShadowArray* rhs);
// --------------------
// nsStyleFont
//
nsStyleFont::nsStyleFont(const nsFont& aFont, nsPresContext *aPresContext)
: mFont(aFont),
mGenericID(kGenericFont_NONE)
{
MOZ_COUNT_CTOR(nsStyleFont);
mSize = mFont.size = nsStyleFont::ZoomText(aPresContext, mFont.size);
#ifdef MOZ_MATHML
mScriptUnconstrainedSize = mSize;
mScriptMinSize = aPresContext->CSSTwipsToAppUnits(
NS_POINTS_TO_TWIPS(NS_MATHML_DEFAULT_SCRIPT_MIN_SIZE_PT));
mScriptLevel = 0;
mScriptSizeMultiplier = NS_MATHML_DEFAULT_SCRIPT_SIZE_MULTIPLIER;
#endif
}
nsStyleFont::nsStyleFont(const nsStyleFont& aSrc)
: mFont(aSrc.mFont)
, mSize(aSrc.mSize)
, mGenericID(aSrc.mGenericID)
#ifdef MOZ_MATHML
, mScriptLevel(aSrc.mScriptLevel)
, mScriptUnconstrainedSize(aSrc.mScriptUnconstrainedSize)
, mScriptMinSize(aSrc.mScriptMinSize)
, mScriptSizeMultiplier(aSrc.mScriptSizeMultiplier)
#endif
{
MOZ_COUNT_CTOR(nsStyleFont);
}
nsStyleFont::nsStyleFont(nsPresContext* aPresContext)
: mFont(*(aPresContext->GetDefaultFont(kPresContext_DefaultVariableFont_ID))),
mGenericID(kGenericFont_NONE)
{
MOZ_COUNT_CTOR(nsStyleFont);
mSize = mFont.size = nsStyleFont::ZoomText(aPresContext, mFont.size);
#ifdef MOZ_MATHML
mScriptUnconstrainedSize = mSize;
mScriptMinSize = aPresContext->CSSTwipsToAppUnits(
NS_POINTS_TO_TWIPS(NS_MATHML_DEFAULT_SCRIPT_MIN_SIZE_PT));
mScriptLevel = 0;
mScriptSizeMultiplier = NS_MATHML_DEFAULT_SCRIPT_SIZE_MULTIPLIER;
#endif
}
void*
nsStyleFont::operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
void* result = aContext->AllocateFromShell(sz);
if (result)
memset(result, 0, sz);
return result;
}
void
nsStyleFont::Destroy(nsPresContext* aContext) {
this->~nsStyleFont();
aContext->FreeToShell(sizeof(nsStyleFont), this);
}
nsChangeHint nsStyleFont::CalcDifference(const nsStyleFont& aOther) const
{
if (mSize == aOther.mSize) {
return CalcFontDifference(mFont, aOther.mFont);
}
return NS_STYLE_HINT_REFLOW;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleFont::MaxDifference()
{
return NS_STYLE_HINT_REFLOW;
}
#endif
/* static */ nscoord
nsStyleFont::ZoomText(nsPresContext *aPresContext, nscoord aSize)
{
return nscoord(float(aSize) * aPresContext->TextZoom());
}
/* static */ nscoord
nsStyleFont::UnZoomText(nsPresContext *aPresContext, nscoord aSize)
{
return nscoord(float(aSize) / aPresContext->TextZoom());
}
nsChangeHint nsStyleFont::CalcFontDifference(const nsFont& aFont1, const nsFont& aFont2)
{
if ((aFont1.size == aFont2.size) &&
(aFont1.sizeAdjust == aFont2.sizeAdjust) &&
(aFont1.style == aFont2.style) &&
(aFont1.variant == aFont2.variant) &&
(aFont1.familyNameQuirks == aFont2.familyNameQuirks) &&
(aFont1.weight == aFont2.weight) &&
(aFont1.stretch == aFont2.stretch) &&
(aFont1.name == aFont2.name) &&
(aFont1.featureSettings == aFont2.featureSettings) &&
(aFont1.languageOverride == aFont2.languageOverride)) {
if ((aFont1.decorations == aFont2.decorations)) {
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
static PRBool IsFixedData(const nsStyleSides& aSides, PRBool aEnumOK)
{
NS_FOR_CSS_SIDES(side) {
if (!IsFixedUnit(aSides.Get(side), aEnumOK))
return PR_FALSE;
}
return PR_TRUE;
}
static nscoord CalcCoord(const nsStyleCoord& aCoord,
const nscoord* aEnumTable,
PRInt32 aNumEnums)
{
if (aCoord.GetUnit() == eStyleUnit_Enumerated) {
NS_ABORT_IF_FALSE(aEnumTable, "must have enum table");
PRInt32 value = aCoord.GetIntValue();
if (0 <= value && value < aNumEnums) {
return aEnumTable[aCoord.GetIntValue()];
}
NS_NOTREACHED("unexpected enum value");
return 0;
}
NS_ABORT_IF_FALSE(aCoord.ConvertsToLength(), "unexpected unit");
return nsRuleNode::ComputeCoordPercentCalc(aCoord, 0);
}
nsStyleMargin::nsStyleMargin() {
MOZ_COUNT_CTOR(nsStyleMargin);
nsStyleCoord zero(0, nsStyleCoord::CoordConstructor);
NS_FOR_CSS_SIDES(side) {
mMargin.Set(side, zero);
}
mHasCachedMargin = PR_FALSE;
}
nsStyleMargin::nsStyleMargin(const nsStyleMargin& aSrc) {
MOZ_COUNT_CTOR(nsStyleMargin);
mMargin = aSrc.mMargin;
mHasCachedMargin = PR_FALSE;
}
void*
nsStyleMargin::operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
void* result = aContext->AllocateFromShell(sz);
if (result)
memset(result, 0, sz);
return result;
}
void
nsStyleMargin::Destroy(nsPresContext* aContext) {
this->~nsStyleMargin();
aContext->FreeToShell(sizeof(nsStyleMargin), this);
}
void nsStyleMargin::RecalcData()
{
if (IsFixedData(mMargin, PR_FALSE)) {
NS_FOR_CSS_SIDES(side) {
mCachedMargin.side(side) = CalcCoord(mMargin.Get(side), nsnull, 0);
}
mHasCachedMargin = PR_TRUE;
}
else
mHasCachedMargin = PR_FALSE;
}
nsChangeHint nsStyleMargin::CalcDifference(const nsStyleMargin& aOther) const
{
if (mMargin == aOther.mMargin) {
return NS_STYLE_HINT_NONE;
}
// Margin differences can't affect descendant intrinsic sizes and
// don't need to force children to reflow.
return NS_SubtractHint(NS_STYLE_HINT_REFLOW,
NS_CombineHint(nsChangeHint_ClearDescendantIntrinsics,
nsChangeHint_NeedDirtyReflow));
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleMargin::MaxDifference()
{
return NS_SubtractHint(NS_STYLE_HINT_REFLOW,
NS_CombineHint(nsChangeHint_ClearDescendantIntrinsics,
nsChangeHint_NeedDirtyReflow));
}
#endif
nsStylePadding::nsStylePadding() {
MOZ_COUNT_CTOR(nsStylePadding);
nsStyleCoord zero(0, nsStyleCoord::CoordConstructor);
NS_FOR_CSS_SIDES(side) {
mPadding.Set(side, zero);
}
mHasCachedPadding = PR_FALSE;
}
nsStylePadding::nsStylePadding(const nsStylePadding& aSrc) {
MOZ_COUNT_CTOR(nsStylePadding);
mPadding = aSrc.mPadding;
mHasCachedPadding = PR_FALSE;
}
void*
nsStylePadding::operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
void* result = aContext->AllocateFromShell(sz);
if (result)
memset(result, 0, sz);
return result;
}
void
nsStylePadding::Destroy(nsPresContext* aContext) {
this->~nsStylePadding();
aContext->FreeToShell(sizeof(nsStylePadding), this);
}
void nsStylePadding::RecalcData()
{
if (IsFixedData(mPadding, PR_FALSE)) {
NS_FOR_CSS_SIDES(side) {
// Clamp negative calc() to 0.
mCachedPadding.side(side) =
NS_MAX(CalcCoord(mPadding.Get(side), nsnull, 0), 0);
}
mHasCachedPadding = PR_TRUE;
}
else
mHasCachedPadding = PR_FALSE;
}
nsChangeHint nsStylePadding::CalcDifference(const nsStylePadding& aOther) const
{
if (mPadding == aOther.mPadding) {
return NS_STYLE_HINT_NONE;
}
// Padding differences can't affect descendant intrinsic sizes, but do need
// to force children to reflow so that we can reposition them, since their
// offsets are from our frame bounds but our content rect's position within
// those bounds is moving.
return NS_SubtractHint(NS_STYLE_HINT_REFLOW,
nsChangeHint_ClearDescendantIntrinsics);
}
#ifdef DEBUG
/* static */
nsChangeHint nsStylePadding::MaxDifference()
{
return NS_SubtractHint(NS_STYLE_HINT_REFLOW,
nsChangeHint_ClearDescendantIntrinsics);
}
#endif
nsStyleBorder::nsStyleBorder(nsPresContext* aPresContext)
: mHaveBorderImageWidth(PR_FALSE)
#ifdef DEBUG
, mImageTracked(false)
#endif
, mComputedBorder(0, 0, 0, 0)
, mBorderImage(nsnull)
{
MOZ_COUNT_CTOR(nsStyleBorder);
nscoord medium =
(aPresContext->GetBorderWidthTable())[NS_STYLE_BORDER_WIDTH_MEDIUM];
NS_FOR_CSS_SIDES(side) {
mBorder.side(side) = medium;
mBorderStyle[side] = NS_STYLE_BORDER_STYLE_NONE | BORDER_COLOR_FOREGROUND;
mBorderColor[side] = NS_RGB(0, 0, 0);
}
NS_FOR_CSS_HALF_CORNERS(corner) {
mBorderRadius.Set(corner, nsStyleCoord(0, nsStyleCoord::CoordConstructor));
}
mBorderColors = nsnull;
mBoxShadow = nsnull;
mFloatEdge = NS_STYLE_FLOAT_EDGE_CONTENT;
mTwipsPerPixel = aPresContext->DevPixelsToAppUnits(1);
}
nsBorderColors::~nsBorderColors()
{
NS_CSS_DELETE_LIST_MEMBER(nsBorderColors, this, mNext);
}
nsBorderColors*
nsBorderColors::Clone(PRBool aDeep) const
{
nsBorderColors* result = new nsBorderColors(mColor);
if (NS_UNLIKELY(!result))
return result;
if (aDeep)
NS_CSS_CLONE_LIST_MEMBER(nsBorderColors, this, mNext, result, (PR_FALSE));
return result;
}
nsStyleBorder::nsStyleBorder(const nsStyleBorder& aSrc)
: mBorderRadius(aSrc.mBorderRadius),
mBorderImageSplit(aSrc.mBorderImageSplit),
mFloatEdge(aSrc.mFloatEdge),
mBorderImageHFill(aSrc.mBorderImageHFill),
mBorderImageVFill(aSrc.mBorderImageVFill),
mBorderColors(nsnull),
mBoxShadow(aSrc.mBoxShadow),
mHaveBorderImageWidth(aSrc.mHaveBorderImageWidth),
mBorderImageWidth(aSrc.mBorderImageWidth),
mComputedBorder(aSrc.mComputedBorder),
mBorder(aSrc.mBorder),
mBorderImage(aSrc.mBorderImage),
mTwipsPerPixel(aSrc.mTwipsPerPixel)
{
MOZ_COUNT_CTOR(nsStyleBorder);
if (aSrc.mBorderColors) {
EnsureBorderColors();
for (PRInt32 i = 0; i < 4; i++)
if (aSrc.mBorderColors[i])
mBorderColors[i] = aSrc.mBorderColors[i]->Clone();
else
mBorderColors[i] = nsnull;
}
NS_FOR_CSS_SIDES(side) {
mBorderStyle[side] = aSrc.mBorderStyle[side];
mBorderColor[side] = aSrc.mBorderColor[side];
}
NS_FOR_CSS_HALF_CORNERS(corner) {
mBorderRadius.Set(corner, aSrc.mBorderRadius.Get(corner));
}
}
nsStyleBorder::~nsStyleBorder()
{
NS_ABORT_IF_FALSE(!mImageTracked,
"nsStyleBorder being destroyed while still tracking image!");
MOZ_COUNT_DTOR(nsStyleBorder);
if (mBorderColors) {
for (PRInt32 i = 0; i < 4; i++)
delete mBorderColors[i];
delete [] mBorderColors;
}
}
void*
nsStyleBorder::operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
void* result = aContext->AllocateFromShell(sz);
if (result)
memset(result, 0, sz);
return result;
}
void
nsStyleBorder::Destroy(nsPresContext* aContext) {
if (mBorderImage)
UntrackImage(aContext);
this->~nsStyleBorder();
aContext->FreeToShell(sizeof(nsStyleBorder), this);
}
nsChangeHint nsStyleBorder::CalcDifference(const nsStyleBorder& aOther) const
{
nsChangeHint shadowDifference =
CalcShadowDifference(mBoxShadow, aOther.mBoxShadow);
// Note that differences in mBorder don't affect rendering (which should only
// use mComputedBorder), so don't need to be tested for here.
// XXXbz we should be able to return a more specific change hint for
// at least GetActualBorder() differences...
if (mTwipsPerPixel != aOther.mTwipsPerPixel ||
GetActualBorder() != aOther.GetActualBorder() ||
mFloatEdge != aOther.mFloatEdge ||
(shadowDifference & nsChangeHint_ReflowFrame))
return NS_STYLE_HINT_REFLOW;
// Note that mBorderStyle stores not only the border style but also
// color-related flags. Given that we've already done an mComputedBorder
// comparison, border-style differences can only lead to a VISUAL hint. So
// it's OK to just compare the values directly -- if either the actual
// style or the color flags differ we want to repaint.
NS_FOR_CSS_SIDES(ix) {
if (mBorderStyle[ix] != aOther.mBorderStyle[ix] ||
mBorderColor[ix] != aOther.mBorderColor[ix])
return NS_STYLE_HINT_VISUAL;
}
if (mBorderRadius != aOther.mBorderRadius ||
!mBorderColors != !aOther.mBorderColors)
return NS_STYLE_HINT_VISUAL;
if (IsBorderImageLoaded() || aOther.IsBorderImageLoaded()) {
if (mBorderImage != aOther.mBorderImage ||
mBorderImageHFill != aOther.mBorderImageHFill ||
mBorderImageVFill != aOther.mBorderImageVFill ||
mBorderImageSplit != aOther.mBorderImageSplit)
return NS_STYLE_HINT_VISUAL;
// The call to GetActualBorder above already considered
// mBorderImageWidth and mHaveBorderImageWidth.
}
// Note that at this point if mBorderColors is non-null so is
// aOther.mBorderColors
if (mBorderColors) {
NS_FOR_CSS_SIDES(ix) {
if (!nsBorderColors::Equal(mBorderColors[ix],
aOther.mBorderColors[ix]))
return NS_STYLE_HINT_VISUAL;
}
}
return shadowDifference;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleBorder::MaxDifference()
{
return NS_STYLE_HINT_REFLOW;
}
#endif
PRBool
nsStyleBorder::ImageBorderDiffers() const
{
return mComputedBorder !=
(mHaveBorderImageWidth ? mBorderImageWidth : mBorder);
}
const nsMargin&
nsStyleBorder::GetActualBorder() const
{
if (IsBorderImageLoaded())
if (mHaveBorderImageWidth)
return mBorderImageWidth;
else
return mBorder;
else
return mComputedBorder;
}
void
nsStyleBorder::TrackImage(nsPresContext* aContext)
{
// Sanity
NS_ABORT_IF_FALSE(!mImageTracked, "Already tracking image!");
NS_ABORT_IF_FALSE(mBorderImage, "Can't track null image!");
// Register the image with the document
nsIDocument* doc = aContext->Document();
if (doc)
doc->AddImage(mBorderImage);
// Mark state
#ifdef DEBUG
mImageTracked = true;
#endif
}
void
nsStyleBorder::UntrackImage(nsPresContext* aContext)
{
// Sanity
NS_ABORT_IF_FALSE(mImageTracked, "Image not tracked!");
NS_ABORT_IF_FALSE(mBorderImage, "Can't track null image!");
// Unregister the image with the document
nsIDocument* doc = aContext->Document();
if (doc)
doc->RemoveImage(mBorderImage);
// Mark state
#ifdef DEBUG
mImageTracked = false;
#endif
}
nsStyleOutline::nsStyleOutline(nsPresContext* aPresContext)
{
MOZ_COUNT_CTOR(nsStyleOutline);
// spacing values not inherited
nsStyleCoord zero(0, nsStyleCoord::CoordConstructor);
NS_FOR_CSS_HALF_CORNERS(corner) {
mOutlineRadius.Set(corner, zero);
}
mOutlineOffset = 0;
mOutlineWidth = nsStyleCoord(NS_STYLE_BORDER_WIDTH_MEDIUM, eStyleUnit_Enumerated);
mOutlineStyle = NS_STYLE_BORDER_STYLE_NONE;
mOutlineColor = NS_RGB(0, 0, 0);
mHasCachedOutline = PR_FALSE;
mTwipsPerPixel = aPresContext->DevPixelsToAppUnits(1);
}
nsStyleOutline::nsStyleOutline(const nsStyleOutline& aSrc) {
MOZ_COUNT_CTOR(nsStyleOutline);
memcpy((nsStyleOutline*)this, &aSrc, sizeof(nsStyleOutline));
}
void
nsStyleOutline::RecalcData(nsPresContext* aContext)
{
if (NS_STYLE_BORDER_STYLE_NONE == GetOutlineStyle()) {
mCachedOutlineWidth = 0;
mHasCachedOutline = PR_TRUE;
} else if (IsFixedUnit(mOutlineWidth, PR_TRUE)) {
// Clamp negative calc() to 0.
mCachedOutlineWidth =
NS_MAX(CalcCoord(mOutlineWidth, aContext->GetBorderWidthTable(), 3), 0);
mCachedOutlineWidth =
NS_ROUND_BORDER_TO_PIXELS(mCachedOutlineWidth, mTwipsPerPixel);
mHasCachedOutline = PR_TRUE;
}
else
mHasCachedOutline = PR_FALSE;
}
nsChangeHint nsStyleOutline::CalcDifference(const nsStyleOutline& aOther) const
{
PRBool outlineWasVisible =
mCachedOutlineWidth > 0 && mOutlineStyle != NS_STYLE_BORDER_STYLE_NONE;
PRBool outlineIsVisible =
aOther.mCachedOutlineWidth > 0 && aOther.mOutlineStyle != NS_STYLE_BORDER_STYLE_NONE;
if (outlineWasVisible != outlineIsVisible ||
(outlineIsVisible && (mOutlineOffset != aOther.mOutlineOffset ||
mOutlineWidth != aOther.mOutlineWidth ||
mTwipsPerPixel != aOther.mTwipsPerPixel))) {
return NS_CombineHint(nsChangeHint_ReflowFrame, nsChangeHint_RepaintFrame);
}
if ((mOutlineStyle != aOther.mOutlineStyle) ||
(mOutlineColor != aOther.mOutlineColor) ||
(mOutlineRadius != aOther.mOutlineRadius)) {
return nsChangeHint_RepaintFrame;
}
return NS_STYLE_HINT_NONE;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleOutline::MaxDifference()
{
return NS_CombineHint(nsChangeHint_ReflowFrame, nsChangeHint_RepaintFrame);
}
#endif
// --------------------
// nsStyleList
//
nsStyleList::nsStyleList()
: mListStyleType(NS_STYLE_LIST_STYLE_DISC),
mListStylePosition(NS_STYLE_LIST_STYLE_POSITION_OUTSIDE)
{
MOZ_COUNT_CTOR(nsStyleList);
}
nsStyleList::~nsStyleList()
{
MOZ_COUNT_DTOR(nsStyleList);
}
nsStyleList::nsStyleList(const nsStyleList& aSource)
: mListStyleType(aSource.mListStyleType),
mListStylePosition(aSource.mListStylePosition),
mImageRegion(aSource.mImageRegion)
{
SetListStyleImage(aSource.GetListStyleImage());
MOZ_COUNT_CTOR(nsStyleList);
}
nsChangeHint nsStyleList::CalcDifference(const nsStyleList& aOther) const
{
if (mListStylePosition != aOther.mListStylePosition)
return NS_STYLE_HINT_FRAMECHANGE;
if (EqualImages(mListStyleImage, aOther.mListStyleImage) &&
mListStyleType == aOther.mListStyleType) {
if (mImageRegion == aOther.mImageRegion)
return NS_STYLE_HINT_NONE;
if (mImageRegion.width == aOther.mImageRegion.width &&
mImageRegion.height == aOther.mImageRegion.height)
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleList::MaxDifference()
{
return NS_STYLE_HINT_FRAMECHANGE;
}
#endif
// --------------------
// nsStyleXUL
//
nsStyleXUL::nsStyleXUL()
{
MOZ_COUNT_CTOR(nsStyleXUL);
mBoxAlign = NS_STYLE_BOX_ALIGN_STRETCH;
mBoxDirection = NS_STYLE_BOX_DIRECTION_NORMAL;
mBoxFlex = 0.0f;
mBoxOrient = NS_STYLE_BOX_ORIENT_HORIZONTAL;
mBoxPack = NS_STYLE_BOX_PACK_START;
mBoxOrdinal = 1;
mStretchStack = PR_TRUE;
}
nsStyleXUL::~nsStyleXUL()
{
MOZ_COUNT_DTOR(nsStyleXUL);
}
nsStyleXUL::nsStyleXUL(const nsStyleXUL& aSource)
{
MOZ_COUNT_CTOR(nsStyleXUL);
memcpy((nsStyleXUL*)this, &aSource, sizeof(nsStyleXUL));
}
nsChangeHint nsStyleXUL::CalcDifference(const nsStyleXUL& aOther) const
{
if (mBoxAlign == aOther.mBoxAlign &&
mBoxDirection == aOther.mBoxDirection &&
mBoxFlex == aOther.mBoxFlex &&
mBoxOrient == aOther.mBoxOrient &&
mBoxPack == aOther.mBoxPack &&
mBoxOrdinal == aOther.mBoxOrdinal)
return NS_STYLE_HINT_NONE;
if (mBoxOrdinal != aOther.mBoxOrdinal)
return NS_STYLE_HINT_FRAMECHANGE;
return NS_STYLE_HINT_REFLOW;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleXUL::MaxDifference()
{
return NS_STYLE_HINT_FRAMECHANGE;
}
#endif
// --------------------
// nsStyleColumn
//
nsStyleColumn::nsStyleColumn(nsPresContext* aPresContext)
{
MOZ_COUNT_CTOR(nsStyleColumn);
mColumnCount = NS_STYLE_COLUMN_COUNT_AUTO;
mColumnWidth.SetAutoValue();
mColumnGap.SetNormalValue();
mColumnRuleWidth = (aPresContext->GetBorderWidthTable())[NS_STYLE_BORDER_WIDTH_MEDIUM];
mColumnRuleStyle = NS_STYLE_BORDER_STYLE_NONE;
mColumnRuleColor = NS_RGB(0, 0, 0);
mColumnRuleColorIsForeground = PR_TRUE;
mTwipsPerPixel = aPresContext->AppUnitsPerDevPixel();
}
nsStyleColumn::~nsStyleColumn()
{
MOZ_COUNT_DTOR(nsStyleColumn);
}
nsStyleColumn::nsStyleColumn(const nsStyleColumn& aSource)
{
MOZ_COUNT_CTOR(nsStyleColumn);
memcpy((nsStyleColumn*)this, &aSource, sizeof(nsStyleColumn));
}
nsChangeHint nsStyleColumn::CalcDifference(const nsStyleColumn& aOther) const
{
if ((mColumnWidth.GetUnit() == eStyleUnit_Auto)
!= (aOther.mColumnWidth.GetUnit() == eStyleUnit_Auto) ||
mColumnCount != aOther.mColumnCount)
// We force column count changes to do a reframe, because it's tricky to handle
// some edge cases where the column count gets smaller and content overflows.
// XXX not ideal
return NS_STYLE_HINT_FRAMECHANGE;
if (mColumnWidth != aOther.mColumnWidth ||
mColumnGap != aOther.mColumnGap)
return NS_STYLE_HINT_REFLOW;
if (GetComputedColumnRuleWidth() != aOther.GetComputedColumnRuleWidth() ||
mColumnRuleStyle != aOther.mColumnRuleStyle ||
mColumnRuleColor != aOther.mColumnRuleColor ||
mColumnRuleColorIsForeground != aOther.mColumnRuleColorIsForeground)
return NS_STYLE_HINT_VISUAL;
return NS_STYLE_HINT_NONE;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleColumn::MaxDifference()
{
return NS_STYLE_HINT_FRAMECHANGE;
}
#endif
// --------------------
// nsStyleSVG
//
nsStyleSVG::nsStyleSVG()
{
MOZ_COUNT_CTOR(nsStyleSVG);
mFill.mType = eStyleSVGPaintType_Color;
mFill.mPaint.mColor = NS_RGB(0,0,0);
mFill.mFallbackColor = NS_RGB(0,0,0);
mStroke.mType = eStyleSVGPaintType_None;
mStroke.mPaint.mColor = NS_RGB(0,0,0);
mStroke.mFallbackColor = NS_RGB(0,0,0);
mStrokeDasharray = nsnull;
mStrokeDashoffset.SetCoordValue(0);
mStrokeWidth.SetCoordValue(nsPresContext::CSSPixelsToAppUnits(1));
mFillOpacity = 1.0f;
mStrokeMiterlimit = 4.0f;
mStrokeOpacity = 1.0f;
mStrokeDasharrayLength = 0;
mClipRule = NS_STYLE_FILL_RULE_NONZERO;
mColorInterpolation = NS_STYLE_COLOR_INTERPOLATION_SRGB;
mColorInterpolationFilters = NS_STYLE_COLOR_INTERPOLATION_LINEARRGB;
mFillRule = NS_STYLE_FILL_RULE_NONZERO;
mImageRendering = NS_STYLE_IMAGE_RENDERING_AUTO;
mShapeRendering = NS_STYLE_SHAPE_RENDERING_AUTO;
mStrokeLinecap = NS_STYLE_STROKE_LINECAP_BUTT;
mStrokeLinejoin = NS_STYLE_STROKE_LINEJOIN_MITER;
mTextAnchor = NS_STYLE_TEXT_ANCHOR_START;
mTextRendering = NS_STYLE_TEXT_RENDERING_AUTO;
}
nsStyleSVG::~nsStyleSVG()
{
MOZ_COUNT_DTOR(nsStyleSVG);
delete [] mStrokeDasharray;
}
nsStyleSVG::nsStyleSVG(const nsStyleSVG& aSource)
{
MOZ_COUNT_CTOR(nsStyleSVG);
mFill = aSource.mFill;
mStroke = aSource.mStroke;
mMarkerEnd = aSource.mMarkerEnd;
mMarkerMid = aSource.mMarkerMid;
mMarkerStart = aSource.mMarkerStart;
mStrokeDasharrayLength = aSource.mStrokeDasharrayLength;
if (aSource.mStrokeDasharray) {
mStrokeDasharray = new nsStyleCoord[mStrokeDasharrayLength];
if (mStrokeDasharray)
memcpy(mStrokeDasharray,
aSource.mStrokeDasharray,
mStrokeDasharrayLength * sizeof(nsStyleCoord));
else
mStrokeDasharrayLength = 0;
} else {
mStrokeDasharray = nsnull;
}
mStrokeDashoffset = aSource.mStrokeDashoffset;
mStrokeWidth = aSource.mStrokeWidth;
mFillOpacity = aSource.mFillOpacity;
mStrokeMiterlimit = aSource.mStrokeMiterlimit;
mStrokeOpacity = aSource.mStrokeOpacity;
mClipRule = aSource.mClipRule;
mColorInterpolation = aSource.mColorInterpolation;
mColorInterpolationFilters = aSource.mColorInterpolationFilters;
mFillRule = aSource.mFillRule;
mImageRendering = aSource.mImageRendering;
mShapeRendering = aSource.mShapeRendering;
mStrokeLinecap = aSource.mStrokeLinecap;
mStrokeLinejoin = aSource.mStrokeLinejoin;
mTextAnchor = aSource.mTextAnchor;
mTextRendering = aSource.mTextRendering;
}
static PRBool PaintURIChanged(const nsStyleSVGPaint& aPaint1,
const nsStyleSVGPaint& aPaint2)
{
if (aPaint1.mType != aPaint2.mType) {
return aPaint1.mType == eStyleSVGPaintType_Server ||
aPaint2.mType == eStyleSVGPaintType_Server;
}
return aPaint1.mType == eStyleSVGPaintType_Server &&
!EqualURIs(aPaint1.mPaint.mPaintServer, aPaint2.mPaint.mPaintServer);
}
nsChangeHint nsStyleSVG::CalcDifference(const nsStyleSVG& aOther) const
{
nsChangeHint hint = nsChangeHint(0);
if (mTextRendering != aOther.mTextRendering) {
NS_UpdateHint(hint, nsChangeHint_RepaintFrame);
// May be needed for non-svg frames
NS_UpdateHint(hint, nsChangeHint_ReflowFrame);
}
if (!EqualURIs(mMarkerEnd, aOther.mMarkerEnd) ||
!EqualURIs(mMarkerMid, aOther.mMarkerMid) ||
!EqualURIs(mMarkerStart, aOther.mMarkerStart)) {
NS_UpdateHint(hint, nsChangeHint_RepaintFrame);
NS_UpdateHint(hint, nsChangeHint_UpdateEffects);
return hint;
}
if (mFill != aOther.mFill ||
mStroke != aOther.mStroke) {
NS_UpdateHint(hint, nsChangeHint_RepaintFrame);
if (PaintURIChanged(mFill, aOther.mFill) ||
PaintURIChanged(mStroke, aOther.mStroke)) {
NS_UpdateHint(hint, nsChangeHint_UpdateEffects);
}
// Nothing more to do, below we can only set "repaint"
return hint;
}
if ( mStrokeDashoffset != aOther.mStrokeDashoffset ||
mStrokeWidth != aOther.mStrokeWidth ||
mFillOpacity != aOther.mFillOpacity ||
mStrokeMiterlimit != aOther.mStrokeMiterlimit ||
mStrokeOpacity != aOther.mStrokeOpacity ||
mClipRule != aOther.mClipRule ||
mColorInterpolation != aOther.mColorInterpolation ||
mColorInterpolationFilters != aOther.mColorInterpolationFilters ||
mFillRule != aOther.mFillRule ||
mImageRendering != aOther.mImageRendering ||
mShapeRendering != aOther.mShapeRendering ||
mStrokeDasharrayLength != aOther.mStrokeDasharrayLength ||
mStrokeLinecap != aOther.mStrokeLinecap ||
mStrokeLinejoin != aOther.mStrokeLinejoin ||
mTextAnchor != aOther.mTextAnchor) {
NS_UpdateHint(hint, nsChangeHint_RepaintFrame);
return hint;
}
// length of stroke dasharrays are the same (tested above) - check entries
for (PRUint32 i=0; i<mStrokeDasharrayLength; i++)
if (mStrokeDasharray[i] != aOther.mStrokeDasharray[i]) {
NS_UpdateHint(hint, nsChangeHint_RepaintFrame);
return hint;
}
return hint;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleSVG::MaxDifference()
{
return NS_CombineHint(NS_CombineHint(nsChangeHint_UpdateEffects,
nsChangeHint_ReflowFrame),
nsChangeHint_RepaintFrame);
}
#endif
// --------------------
// nsStyleSVGReset
//
nsStyleSVGReset::nsStyleSVGReset()
{
MOZ_COUNT_CTOR(nsStyleSVGReset);
mStopColor = NS_RGB(0,0,0);
mFloodColor = NS_RGB(0,0,0);
mLightingColor = NS_RGB(255,255,255);
mClipPath = nsnull;
mFilter = nsnull;
mMask = nsnull;
mStopOpacity = 1.0f;
mFloodOpacity = 1.0f;
mDominantBaseline = NS_STYLE_DOMINANT_BASELINE_AUTO;
}
nsStyleSVGReset::~nsStyleSVGReset()
{
MOZ_COUNT_DTOR(nsStyleSVGReset);
}
nsStyleSVGReset::nsStyleSVGReset(const nsStyleSVGReset& aSource)
{
MOZ_COUNT_CTOR(nsStyleSVGReset);
mStopColor = aSource.mStopColor;
mFloodColor = aSource.mFloodColor;
mLightingColor = aSource.mLightingColor;
mClipPath = aSource.mClipPath;
mFilter = aSource.mFilter;
mMask = aSource.mMask;
mStopOpacity = aSource.mStopOpacity;
mFloodOpacity = aSource.mFloodOpacity;
mDominantBaseline = aSource.mDominantBaseline;
}
nsChangeHint nsStyleSVGReset::CalcDifference(const nsStyleSVGReset& aOther) const
{
nsChangeHint hint = nsChangeHint(0);
if (!EqualURIs(mClipPath, aOther.mClipPath) ||
!EqualURIs(mFilter, aOther.mFilter) ||
!EqualURIs(mMask, aOther.mMask)) {
NS_UpdateHint(hint, nsChangeHint_UpdateEffects);
NS_UpdateHint(hint, nsChangeHint_ReflowFrame);
NS_UpdateHint(hint, nsChangeHint_RepaintFrame);
} else if (mStopColor != aOther.mStopColor ||
mFloodColor != aOther.mFloodColor ||
mLightingColor != aOther.mLightingColor ||
mStopOpacity != aOther.mStopOpacity ||
mFloodOpacity != aOther.mFloodOpacity ||
mDominantBaseline != aOther.mDominantBaseline)
NS_UpdateHint(hint, nsChangeHint_RepaintFrame);
return hint;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleSVGReset::MaxDifference()
{
return NS_CombineHint(NS_CombineHint(nsChangeHint_UpdateEffects,
nsChangeHint_ReflowFrame),
nsChangeHint_RepaintFrame);
}
#endif
// nsStyleSVGPaint implementation
nsStyleSVGPaint::~nsStyleSVGPaint()
{
if (mType == eStyleSVGPaintType_Server) {
NS_IF_RELEASE(mPaint.mPaintServer);
}
}
void
nsStyleSVGPaint::SetType(nsStyleSVGPaintType aType)
{
if (mType == eStyleSVGPaintType_Server) {
this->~nsStyleSVGPaint();
new (this) nsStyleSVGPaint();
}
mType = aType;
}
nsStyleSVGPaint& nsStyleSVGPaint::operator=(const nsStyleSVGPaint& aOther)
{
if (this == &aOther)
return *this;
SetType(aOther.mType);
mFallbackColor = aOther.mFallbackColor;
if (mType == eStyleSVGPaintType_Server) {
mPaint.mPaintServer = aOther.mPaint.mPaintServer;
NS_IF_ADDREF(mPaint.mPaintServer);
} else {
mPaint.mColor = aOther.mPaint.mColor;
}
return *this;
}
PRBool nsStyleSVGPaint::operator==(const nsStyleSVGPaint& aOther) const
{
if (mType != aOther.mType)
return PR_FALSE;
if (mType == eStyleSVGPaintType_Server)
return EqualURIs(mPaint.mPaintServer, aOther.mPaint.mPaintServer) &&
mFallbackColor == aOther.mFallbackColor;
if (mType == eStyleSVGPaintType_None)
return PR_TRUE;
return mPaint.mColor == aOther.mPaint.mColor;
}
// --------------------
// nsStylePosition
//
nsStylePosition::nsStylePosition(void)
{
MOZ_COUNT_CTOR(nsStylePosition);
// positioning values not inherited
nsStyleCoord autoCoord(eStyleUnit_Auto);
mOffset.SetLeft(autoCoord);
mOffset.SetTop(autoCoord);
mOffset.SetRight(autoCoord);
mOffset.SetBottom(autoCoord);
mWidth.SetAutoValue();
mMinWidth.SetCoordValue(0);
mMaxWidth.SetNoneValue();
mHeight.SetAutoValue();
mMinHeight.SetCoordValue(0);
mMaxHeight.SetNoneValue();
mBoxSizing = NS_STYLE_BOX_SIZING_CONTENT;
mZIndex.SetAutoValue();
}
nsStylePosition::~nsStylePosition(void)
{
MOZ_COUNT_DTOR(nsStylePosition);
}
nsStylePosition::nsStylePosition(const nsStylePosition& aSource)
{
MOZ_COUNT_CTOR(nsStylePosition);
memcpy((nsStylePosition*)this, &aSource, sizeof(nsStylePosition));
}
nsChangeHint nsStylePosition::CalcDifference(const nsStylePosition& aOther) const
{
nsChangeHint hint =
(mZIndex == aOther.mZIndex) ? NS_STYLE_HINT_NONE : nsChangeHint_RepaintFrame;
if (mBoxSizing != aOther.mBoxSizing) {
// Can affect both widths and heights; just a bad scene.
return NS_CombineHint(hint, nsChangeHint_ReflowFrame);
}
if (mHeight != aOther.mHeight ||
mMinHeight != aOther.mMinHeight ||
mMaxHeight != aOther.mMaxHeight) {
// Height changes can affect descendant intrinsic sizes due to replaced
// elements with percentage heights in descendants which also have
// percentage heights. And due to our not-so-great computation of mVResize
// in nsHTMLReflowState, they do need to force reflow of the whole subtree.
// XXXbz due to XUL caching heights as well, height changes also need to
// clear ancestor intrinsics!
return NS_CombineHint(hint, nsChangeHint_ReflowFrame);
}
if ((mWidth == aOther.mWidth) &&
(mMinWidth == aOther.mMinWidth) &&
(mMaxWidth == aOther.mMaxWidth)) {
if (mOffset == aOther.mOffset) {
return hint;
} else {
// Offset changes only affect positioned content, and can't affect any
// intrinsic widths. They also don't need to force reflow of
// descendants.
return NS_CombineHint(hint, nsChangeHint_NeedReflow);
}
}
// None of our width differences can affect descendant intrinsic
// sizes and none of them need to force children to reflow.
return
NS_CombineHint(hint,
NS_SubtractHint(nsChangeHint_ReflowFrame,
NS_CombineHint(nsChangeHint_ClearDescendantIntrinsics,
nsChangeHint_NeedDirtyReflow)));
}
#ifdef DEBUG
/* static */
nsChangeHint nsStylePosition::MaxDifference()
{
return NS_STYLE_HINT_REFLOW;
}
#endif
/* static */ PRBool
nsStylePosition::WidthCoordDependsOnContainer(const nsStyleCoord &aCoord)
{
return aCoord.GetUnit() == eStyleUnit_Auto ||
aCoord.HasPercent() ||
(aCoord.GetUnit() == eStyleUnit_Enumerated &&
(aCoord.GetIntValue() == NS_STYLE_WIDTH_FIT_CONTENT ||
aCoord.GetIntValue() == NS_STYLE_WIDTH_AVAILABLE));
}
// --------------------
// nsStyleTable
//
nsStyleTable::nsStyleTable()
{
MOZ_COUNT_CTOR(nsStyleTable);
// values not inherited
mLayoutStrategy = NS_STYLE_TABLE_LAYOUT_AUTO;
mCols = NS_STYLE_TABLE_COLS_NONE;
mFrame = NS_STYLE_TABLE_FRAME_NONE;
mRules = NS_STYLE_TABLE_RULES_NONE;
mSpan = 1;
}
nsStyleTable::~nsStyleTable(void)
{
MOZ_COUNT_DTOR(nsStyleTable);
}
nsStyleTable::nsStyleTable(const nsStyleTable& aSource)
{
MOZ_COUNT_CTOR(nsStyleTable);
memcpy((nsStyleTable*)this, &aSource, sizeof(nsStyleTable));
}
nsChangeHint nsStyleTable::CalcDifference(const nsStyleTable& aOther) const
{
// Changes in mRules may require reframing (if border-collapse stuff changes, for example).
if (mRules != aOther.mRules || mSpan != aOther.mSpan ||
mLayoutStrategy != aOther.mLayoutStrategy)
return NS_STYLE_HINT_FRAMECHANGE;
if (mFrame != aOther.mFrame || mCols != aOther.mCols)
return NS_STYLE_HINT_REFLOW;
return NS_STYLE_HINT_NONE;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleTable::MaxDifference()
{
return NS_STYLE_HINT_FRAMECHANGE;
}
#endif
// -----------------------
// nsStyleTableBorder
nsStyleTableBorder::nsStyleTableBorder(nsPresContext* aPresContext)
{
MOZ_COUNT_CTOR(nsStyleTableBorder);
mBorderCollapse = NS_STYLE_BORDER_SEPARATE;
nsCompatibility compatMode = eCompatibility_FullStandards;
if (aPresContext)
compatMode = aPresContext->CompatibilityMode();
mEmptyCells = (compatMode == eCompatibility_NavQuirks)
? NS_STYLE_TABLE_EMPTY_CELLS_SHOW_BACKGROUND
: NS_STYLE_TABLE_EMPTY_CELLS_SHOW;
mCaptionSide = NS_STYLE_CAPTION_SIDE_TOP;
mBorderSpacingX = 0;
mBorderSpacingY = 0;
}
nsStyleTableBorder::~nsStyleTableBorder(void)
{
MOZ_COUNT_DTOR(nsStyleTableBorder);
}
nsStyleTableBorder::nsStyleTableBorder(const nsStyleTableBorder& aSource)
{
MOZ_COUNT_CTOR(nsStyleTableBorder);
memcpy((nsStyleTableBorder*)this, &aSource, sizeof(nsStyleTableBorder));
}
nsChangeHint nsStyleTableBorder::CalcDifference(const nsStyleTableBorder& aOther) const
{
// Border-collapse changes need a reframe, because we use a different frame
// class for table cells in the collapsed border model. This is used to
// conserve memory when using the separated border model (collapsed borders
// require extra state to be stored).
if (mBorderCollapse != aOther.mBorderCollapse) {
return NS_STYLE_HINT_FRAMECHANGE;
}
if ((mCaptionSide == aOther.mCaptionSide) &&
(mBorderSpacingX == aOther.mBorderSpacingX) &&
(mBorderSpacingY == aOther.mBorderSpacingY)) {
if (mEmptyCells == aOther.mEmptyCells)
return NS_STYLE_HINT_NONE;
return NS_STYLE_HINT_VISUAL;
}
else
return NS_STYLE_HINT_REFLOW;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleTableBorder::MaxDifference()
{
return NS_STYLE_HINT_FRAMECHANGE;
}
#endif
// --------------------
// nsStyleColor
//
nsStyleColor::nsStyleColor(nsPresContext* aPresContext)
{
MOZ_COUNT_CTOR(nsStyleColor);
mColor = aPresContext->DefaultColor();
}
nsStyleColor::nsStyleColor(const nsStyleColor& aSource)
{
MOZ_COUNT_CTOR(nsStyleColor);
mColor = aSource.mColor;
}
nsChangeHint nsStyleColor::CalcDifference(const nsStyleColor& aOther) const
{
if (mColor == aOther.mColor)
return NS_STYLE_HINT_NONE;
return NS_STYLE_HINT_VISUAL;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleColor::MaxDifference()
{
return NS_STYLE_HINT_VISUAL;
}
#endif
// --------------------
// nsStyleGradient
//
PRBool
nsStyleGradient::operator==(const nsStyleGradient& aOther) const
{
NS_ABORT_IF_FALSE(mSize == NS_STYLE_GRADIENT_SIZE_FARTHEST_CORNER ||
mShape != NS_STYLE_GRADIENT_SHAPE_LINEAR,
"incorrect combination of shape and size");
NS_ABORT_IF_FALSE(aOther.mSize == NS_STYLE_GRADIENT_SIZE_FARTHEST_CORNER ||
aOther.mShape != NS_STYLE_GRADIENT_SHAPE_LINEAR,
"incorrect combination of shape and size");
if (mShape != aOther.mShape ||
mSize != aOther.mSize ||
mRepeating != aOther.mRepeating ||
mBgPosX != aOther.mBgPosX ||
mBgPosY != aOther.mBgPosY ||
mAngle != aOther.mAngle)
return PR_FALSE;
if (mStops.Length() != aOther.mStops.Length())
return PR_FALSE;
for (PRUint32 i = 0; i < mStops.Length(); i++) {
if (mStops[i].mLocation != aOther.mStops[i].mLocation ||
mStops[i].mColor != aOther.mStops[i].mColor)
return PR_FALSE;
}
return PR_TRUE;
}
nsStyleGradient::nsStyleGradient(void)
: mShape(NS_STYLE_GRADIENT_SHAPE_LINEAR)
, mSize(NS_STYLE_GRADIENT_SIZE_FARTHEST_CORNER)
, mRepeating(PR_FALSE)
{
}
// --------------------
// nsStyleImage
//
nsStyleImage::nsStyleImage()
: mType(eStyleImageType_Null)
, mCropRect(nsnull)
#ifdef DEBUG
, mImageTracked(false)
#endif
{
MOZ_COUNT_CTOR(nsStyleImage);
}
nsStyleImage::~nsStyleImage()
{
MOZ_COUNT_DTOR(nsStyleImage);
if (mType != eStyleImageType_Null)
SetNull();
}
nsStyleImage::nsStyleImage(const nsStyleImage& aOther)
: mType(eStyleImageType_Null)
, mCropRect(nsnull)
#ifdef DEBUG
, mImageTracked(false)
#endif
{
// We need our own copy constructor because we don't want
// to copy the reference count
MOZ_COUNT_CTOR(nsStyleImage);
DoCopy(aOther);
}
nsStyleImage&
nsStyleImage::operator=(const nsStyleImage& aOther)
{
if (this != &aOther)
DoCopy(aOther);
return *this;
}
void
nsStyleImage::DoCopy(const nsStyleImage& aOther)
{
SetNull();
if (aOther.mType == eStyleImageType_Image)
SetImageData(aOther.mImage);
else if (aOther.mType == eStyleImageType_Gradient)
SetGradientData(aOther.mGradient);
else if (aOther.mType == eStyleImageType_Element)
SetElementId(aOther.mElementId);
SetCropRect(aOther.mCropRect);
}
void
nsStyleImage::SetNull()
{
NS_ABORT_IF_FALSE(!mImageTracked,
"Calling SetNull() with image tracked!");
if (mType == eStyleImageType_Gradient)
mGradient->Release();
else if (mType == eStyleImageType_Image)
NS_RELEASE(mImage);
else if (mType == eStyleImageType_Element)
nsCRT::free(mElementId);
mType = eStyleImageType_Null;
mCropRect = nsnull;
}
void
nsStyleImage::SetImageData(imgIRequest* aImage)
{
NS_ABORT_IF_FALSE(!mImageTracked,
"Setting a new image without untracking the old one!");
NS_IF_ADDREF(aImage);
if (mType != eStyleImageType_Null)
SetNull();
if (aImage) {
mImage = aImage;
mType = eStyleImageType_Image;
}
}
void
nsStyleImage::TrackImage(nsPresContext* aContext)
{
// Sanity
NS_ABORT_IF_FALSE(!mImageTracked, "Already tracking image!");
NS_ABORT_IF_FALSE(mType == eStyleImageType_Image,
"Can't track image when there isn't one!");
// Register the image with the document
nsIDocument* doc = aContext->Document();
if (doc)
doc->AddImage(mImage);
// Mark state
#ifdef DEBUG
mImageTracked = true;
#endif
}
void
nsStyleImage::UntrackImage(nsPresContext* aContext)
{
// Sanity
NS_ABORT_IF_FALSE(mImageTracked, "Image not tracked!");
NS_ABORT_IF_FALSE(mType == eStyleImageType_Image,
"Can't untrack image when there isn't one!");
// Unregister the image with the document
nsIDocument* doc = aContext->Document();
if (doc)
doc->RemoveImage(mImage);
// Mark state
#ifdef DEBUG
mImageTracked = false;
#endif
}
void
nsStyleImage::SetGradientData(nsStyleGradient* aGradient)
{
if (aGradient)
aGradient->AddRef();
if (mType != eStyleImageType_Null)
SetNull();
if (aGradient) {
mGradient = aGradient;
mType = eStyleImageType_Gradient;
}
}
void
nsStyleImage::SetElementId(const PRUnichar* aElementId)
{
if (mType != eStyleImageType_Null)
SetNull();
if (aElementId) {
mElementId = nsCRT::strdup(aElementId);
mType = eStyleImageType_Element;
}
}
void
nsStyleImage::SetCropRect(nsStyleSides* aCropRect)
{
if (aCropRect) {
mCropRect = new nsStyleSides(*aCropRect);
// There is really not much we can do if 'new' fails
} else {
mCropRect = nsnull;
}
}
static PRInt32
ConvertToPixelCoord(const nsStyleCoord& aCoord, PRInt32 aPercentScale)
{
double pixelValue;
switch (aCoord.GetUnit()) {
case eStyleUnit_Percent:
pixelValue = aCoord.GetPercentValue() * aPercentScale;
break;
case eStyleUnit_Factor:
pixelValue = aCoord.GetFactorValue();
break;
default:
NS_NOTREACHED("unexpected unit for image crop rect");
return 0;
}
NS_ABORT_IF_FALSE(pixelValue >= 0, "we ensured non-negative while parsing");
pixelValue = NS_MIN(pixelValue, double(PR_INT32_MAX)); // avoid overflow
return NS_lround(pixelValue);
}
PRBool
nsStyleImage::ComputeActualCropRect(nsIntRect& aActualCropRect,
PRBool* aIsEntireImage) const
{
if (mType != eStyleImageType_Image)
return PR_FALSE;
nsCOMPtr<imgIContainer> imageContainer;
mImage->GetImage(getter_AddRefs(imageContainer));
if (!imageContainer)
return PR_FALSE;
nsIntSize imageSize;
imageContainer->GetWidth(&imageSize.width);
imageContainer->GetHeight(&imageSize.height);
if (imageSize.width <= 0 || imageSize.height <= 0)
return PR_FALSE;
PRInt32 left = ConvertToPixelCoord(mCropRect->GetLeft(), imageSize.width);
PRInt32 top = ConvertToPixelCoord(mCropRect->GetTop(), imageSize.height);
PRInt32 right = ConvertToPixelCoord(mCropRect->GetRight(), imageSize.width);
PRInt32 bottom = ConvertToPixelCoord(mCropRect->GetBottom(), imageSize.height);
// IntersectRect() returns an empty rect if we get negative width or height
nsIntRect cropRect(left, top, right - left, bottom - top);
nsIntRect imageRect(nsIntPoint(0, 0), imageSize);
aActualCropRect.IntersectRect(imageRect, cropRect);
if (aIsEntireImage)
*aIsEntireImage = (aActualCropRect == imageRect);
return PR_TRUE;
}
nsresult
nsStyleImage::RequestDecode() const
{
if ((mType == eStyleImageType_Image) && mImage)
return mImage->RequestDecode();
return NS_OK;
}
PRBool
nsStyleImage::IsOpaque() const
{
if (!IsComplete())
return PR_FALSE;
if (mType == eStyleImageType_Gradient) {
// We could check if every stop color of the gradient is non-transparent.
return PR_FALSE;
}
if (mType == eStyleImageType_Element)
return PR_FALSE;
NS_ABORT_IF_FALSE(mType == eStyleImageType_Image, "unexpected image type");
nsCOMPtr<imgIContainer> imageContainer;
mImage->GetImage(getter_AddRefs(imageContainer));
NS_ABORT_IF_FALSE(imageContainer, "IsComplete() said image container is ready");
// Check if the crop region of the current image frame is opaque
PRBool isOpaque;
if (NS_SUCCEEDED(imageContainer->GetCurrentFrameIsOpaque(&isOpaque)) &&
isOpaque) {
if (!mCropRect)
return PR_TRUE;
// Must make sure if mCropRect contains at least a pixel.
// XXX Is this optimization worth it? Maybe I should just return PR_FALSE.
nsIntRect actualCropRect;
PRBool rv = ComputeActualCropRect(actualCropRect);
NS_ASSERTION(rv, "ComputeActualCropRect() can not fail here");
return rv && !actualCropRect.IsEmpty();
}
return PR_FALSE;
}
PRBool
nsStyleImage::IsComplete() const
{
switch (mType) {
case eStyleImageType_Null:
return PR_FALSE;
case eStyleImageType_Gradient:
case eStyleImageType_Element:
return PR_TRUE;
case eStyleImageType_Image:
{
PRUint32 status = imgIRequest::STATUS_ERROR;
return NS_SUCCEEDED(mImage->GetImageStatus(&status)) &&
(status & imgIRequest::STATUS_SIZE_AVAILABLE) &&
(status & imgIRequest::STATUS_FRAME_COMPLETE);
}
default:
NS_NOTREACHED("unexpected image type");
return PR_FALSE;
}
}
static inline PRBool
EqualRects(const nsStyleSides* aRect1, const nsStyleSides* aRect2)
{
return aRect1 == aRect2 || /* handles null== null, and optimize */
(aRect1 && aRect2 && *aRect1 == *aRect2);
}
PRBool
nsStyleImage::operator==(const nsStyleImage& aOther) const
{
if (mType != aOther.mType)
return PR_FALSE;
if (!EqualRects(mCropRect, aOther.mCropRect))
return PR_FALSE;
if (mType == eStyleImageType_Image)
return EqualImages(mImage, aOther.mImage);
if (mType == eStyleImageType_Gradient)
return *mGradient == *aOther.mGradient;
if (mType == eStyleImageType_Element)
return nsCRT::strcmp(mElementId, aOther.mElementId) == 0;
return PR_TRUE;
}
// --------------------
// nsStyleBackground
//
nsStyleBackground::nsStyleBackground()
: mAttachmentCount(1)
, mClipCount(1)
, mOriginCount(1)
, mRepeatCount(1)
, mPositionCount(1)
, mImageCount(1)
, mSizeCount(1)
, mBackgroundColor(NS_RGBA(0, 0, 0, 0))
, mBackgroundInlinePolicy(NS_STYLE_BG_INLINE_POLICY_CONTINUOUS)
{
MOZ_COUNT_CTOR(nsStyleBackground);
Layer *onlyLayer = mLayers.AppendElement();
NS_ASSERTION(onlyLayer, "auto array must have room for 1 element");
onlyLayer->SetInitialValues();
}
nsStyleBackground::nsStyleBackground(const nsStyleBackground& aSource)
: mAttachmentCount(aSource.mAttachmentCount)
, mClipCount(aSource.mClipCount)
, mOriginCount(aSource.mOriginCount)
, mRepeatCount(aSource.mRepeatCount)
, mPositionCount(aSource.mPositionCount)
, mImageCount(aSource.mImageCount)
, mSizeCount(aSource.mSizeCount)
, mLayers(aSource.mLayers) // deep copy
, mBackgroundColor(aSource.mBackgroundColor)
, mBackgroundInlinePolicy(aSource.mBackgroundInlinePolicy)
{
MOZ_COUNT_CTOR(nsStyleBackground);
// If the deep copy of mLayers failed, truncate the counts.
PRUint32 count = mLayers.Length();
if (count != aSource.mLayers.Length()) {
NS_WARNING("truncating counts due to out-of-memory");
mAttachmentCount = NS_MAX(mAttachmentCount, count);
mClipCount = NS_MAX(mClipCount, count);
mOriginCount = NS_MAX(mOriginCount, count);
mRepeatCount = NS_MAX(mRepeatCount, count);
mPositionCount = NS_MAX(mPositionCount, count);
mImageCount = NS_MAX(mImageCount, count);
mSizeCount = NS_MAX(mSizeCount, count);
}
}
nsStyleBackground::~nsStyleBackground()
{
MOZ_COUNT_DTOR(nsStyleBackground);
}
void
nsStyleBackground::Destroy(nsPresContext* aContext)
{
// Untrack all the images stored in our layers
for (PRUint32 i = 0; i < mImageCount; ++i)
mLayers[i].UntrackImages(aContext);
this->~nsStyleBackground();
aContext->FreeToShell(sizeof(nsStyleBackground), this);
}
nsChangeHint nsStyleBackground::CalcDifference(const nsStyleBackground& aOther) const
{
const nsStyleBackground* moreLayers =
mImageCount > aOther.mImageCount ? this : &aOther;
const nsStyleBackground* lessLayers =
mImageCount > aOther.mImageCount ? &aOther : this;
bool hasVisualDifference = false;
NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, moreLayers) {
if (i < lessLayers->mImageCount) {
if (moreLayers->mLayers[i] != lessLayers->mLayers[i]) {
if ((moreLayers->mLayers[i].mImage.GetType() == eStyleImageType_Element) ||
(lessLayers->mLayers[i].mImage.GetType() == eStyleImageType_Element))
return NS_CombineHint(nsChangeHint_UpdateEffects, NS_STYLE_HINT_VISUAL);
hasVisualDifference = true;
}
} else {
if (moreLayers->mLayers[i].mImage.GetType() == eStyleImageType_Element)
return NS_CombineHint(nsChangeHint_UpdateEffects, NS_STYLE_HINT_VISUAL);
hasVisualDifference = true;
}
}
if (hasVisualDifference ||
mBackgroundColor != aOther.mBackgroundColor ||
mBackgroundInlinePolicy != aOther.mBackgroundInlinePolicy)
return NS_STYLE_HINT_VISUAL;
return NS_STYLE_HINT_NONE;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleBackground::MaxDifference()
{
return NS_CombineHint(nsChangeHint_UpdateEffects, NS_STYLE_HINT_VISUAL);
}
#endif
PRBool nsStyleBackground::HasFixedBackground() const
{
NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(i, this) {
const Layer &layer = mLayers[i];
if (layer.mAttachment == NS_STYLE_BG_ATTACHMENT_FIXED &&
!layer.mImage.IsEmpty()) {
return PR_TRUE;
}
}
return PR_FALSE;
}
PRBool nsStyleBackground::IsTransparent() const
{
return BottomLayer().mImage.IsEmpty() &&
mImageCount == 1 &&
NS_GET_A(mBackgroundColor) == 0;
}
void
nsStyleBackground::Position::SetInitialValues()
{
mXPosition.mPercent = 0.0f;
mXPosition.mLength = 0;
mYPosition.mPercent = 0.0f;
mYPosition.mLength = 0;
}
void
nsStyleBackground::Size::SetInitialValues()
{
mWidthType = mHeightType = eAuto;
}
bool
nsStyleBackground::Size::operator==(const Size& aOther) const
{
NS_ABORT_IF_FALSE(mWidthType < eDimensionType_COUNT,
"bad mWidthType for this");
NS_ABORT_IF_FALSE(mHeightType < eDimensionType_COUNT,
"bad mHeightType for this");
NS_ABORT_IF_FALSE(aOther.mWidthType < eDimensionType_COUNT,
"bad mWidthType for aOther");
NS_ABORT_IF_FALSE(aOther.mHeightType < eDimensionType_COUNT,
"bad mHeightType for aOther");
return mWidthType == aOther.mWidthType &&
mHeightType == aOther.mHeightType &&
(mWidthType != eLengthPercentage || mWidth == aOther.mWidth) &&
(mHeightType != eLengthPercentage || mHeight == aOther.mHeight);
}
nsStyleBackground::Layer::Layer()
{
}
nsStyleBackground::Layer::~Layer()
{
}
void
nsStyleBackground::Layer::SetInitialValues()
{
mAttachment = NS_STYLE_BG_ATTACHMENT_SCROLL;
mClip = NS_STYLE_BG_CLIP_BORDER;
mOrigin = NS_STYLE_BG_ORIGIN_PADDING;
mRepeat = NS_STYLE_BG_REPEAT_XY;
mPosition.SetInitialValues();
mSize.SetInitialValues();
mImage.SetNull();
}
PRBool
nsStyleBackground::Layer::RenderingMightDependOnFrameSize() const
{
// Do we even have an image?
if (mImage.IsEmpty()) {
return PR_FALSE;
}
// Does our position or size depend on frame size?
if (mPosition.DependsOnFrameSize() ||
mSize.DependsOnFrameSize(mImage.GetType())) {
return PR_TRUE;
}
// Are we an SVG image with a viewBox attribute?
if (mImage.GetType() == eStyleImageType_Image) {
nsCOMPtr<imgIContainer> imageContainer;
mImage.GetImageData()->GetImage(getter_AddRefs(imageContainer));
if (imageContainer &&
imageContainer->GetType() == imgIContainer::TYPE_VECTOR) {
nsIFrame* rootFrame = imageContainer->GetRootLayoutFrame();
if (rootFrame &&
nsSVGUtils::RootSVGElementHasViewbox(rootFrame->GetContent())) {
return PR_TRUE;
}
}
}
return PR_FALSE;
}
PRBool
nsStyleBackground::Layer::operator==(const Layer& aOther) const
{
return mAttachment == aOther.mAttachment &&
mClip == aOther.mClip &&
mOrigin == aOther.mOrigin &&
mRepeat == aOther.mRepeat &&
mPosition == aOther.mPosition &&
mSize == aOther.mSize &&
mImage == aOther.mImage;
}
// --------------------
// nsStyleDisplay
//
void nsTimingFunction::AssignFromKeyword(PRInt32 aTimingFunctionType)
{
PR_STATIC_ASSERT(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE == 0);
PR_STATIC_ASSERT(NS_STYLE_TRANSITION_TIMING_FUNCTION_LINEAR == 1);
PR_STATIC_ASSERT(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE_IN == 2);
PR_STATIC_ASSERT(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE_OUT == 3);
PR_STATIC_ASSERT(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE_IN_OUT == 4);
static const float timingFunctionValues[5][4] = {
{ 0.25, 0.10, 0.25, 1.00 }, // ease
{ 0.00, 0.00, 1.00, 1.00 }, // linear
{ 0.42, 0.00, 1.00, 1.00 }, // ease-in
{ 0.00, 0.00, 0.58, 1.00 }, // ease-out
{ 0.42, 0.00, 0.58, 1.00 } // ease-in-out
};
NS_ABORT_IF_FALSE(0 <= aTimingFunctionType && aTimingFunctionType < 5,
"keyword out of range");
mX1 = timingFunctionValues[aTimingFunctionType][0];
mY1 = timingFunctionValues[aTimingFunctionType][1];
mX2 = timingFunctionValues[aTimingFunctionType][2];
mY2 = timingFunctionValues[aTimingFunctionType][3];
}
nsTransition::nsTransition(const nsTransition& aCopy)
: mTimingFunction(aCopy.mTimingFunction)
, mDuration(aCopy.mDuration)
, mDelay(aCopy.mDelay)
, mProperty(aCopy.mProperty)
, mUnknownProperty(aCopy.mUnknownProperty)
{
}
void nsTransition::SetInitialValues()
{
mTimingFunction = nsTimingFunction(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE);
mDuration = 0.0;
mDelay = 0.0;
mProperty = eCSSPropertyExtra_all_properties;
}
void nsTransition::SetUnknownProperty(const nsAString& aUnknownProperty)
{
NS_ASSERTION(nsCSSProps::LookupProperty(aUnknownProperty) ==
eCSSProperty_UNKNOWN,
"should be unknown property");
mProperty = eCSSProperty_UNKNOWN;
mUnknownProperty = do_GetAtom(aUnknownProperty);
}
nsStyleDisplay::nsStyleDisplay()
{
MOZ_COUNT_CTOR(nsStyleDisplay);
mAppearance = NS_THEME_NONE;
mDisplay = NS_STYLE_DISPLAY_INLINE;
mOriginalDisplay = NS_STYLE_DISPLAY_NONE;
mPosition = NS_STYLE_POSITION_STATIC;
mFloats = NS_STYLE_FLOAT_NONE;
mBreakType = NS_STYLE_CLEAR_NONE;
mBreakBefore = PR_FALSE;
mBreakAfter = PR_FALSE;
mOverflowX = NS_STYLE_OVERFLOW_VISIBLE;
mOverflowY = NS_STYLE_OVERFLOW_VISIBLE;
mResize = NS_STYLE_RESIZE_NONE;
mClipFlags = NS_STYLE_CLIP_AUTO;
mClip.SetRect(0,0,0,0);
mOpacity = 1.0f;
mSpecifiedTransform = nsnull;
mTransformOrigin[0].SetPercentValue(0.5f); // Transform is centered on origin
mTransformOrigin[1].SetPercentValue(0.5f);
mTransitions.AppendElement();
NS_ABORT_IF_FALSE(mTransitions.Length() == 1,
"appending within auto buffer should never fail");
mTransitions[0].SetInitialValues();
mTransitionTimingFunctionCount = 1;
mTransitionDurationCount = 1;
mTransitionDelayCount = 1;
mTransitionPropertyCount = 1;
}
nsStyleDisplay::nsStyleDisplay(const nsStyleDisplay& aSource)
: mTransitions(aSource.mTransitions)
, mTransitionTimingFunctionCount(aSource.mTransitionTimingFunctionCount)
, mTransitionDurationCount(aSource.mTransitionDurationCount)
, mTransitionDelayCount(aSource.mTransitionDelayCount)
, mTransitionPropertyCount(aSource.mTransitionPropertyCount)
{
MOZ_COUNT_CTOR(nsStyleDisplay);
mAppearance = aSource.mAppearance;
mDisplay = aSource.mDisplay;
mOriginalDisplay = aSource.mOriginalDisplay;
mBinding = aSource.mBinding;
mPosition = aSource.mPosition;
mFloats = aSource.mFloats;
mBreakType = aSource.mBreakType;
mBreakBefore = aSource.mBreakBefore;
mBreakAfter = aSource.mBreakAfter;
mOverflowX = aSource.mOverflowX;
mOverflowY = aSource.mOverflowY;
mResize = aSource.mResize;
mClipFlags = aSource.mClipFlags;
mClip = aSource.mClip;
mOpacity = aSource.mOpacity;
/* Copy over the transformation information. */
mSpecifiedTransform = aSource.mSpecifiedTransform;
if (mSpecifiedTransform)
mTransform = aSource.mTransform;
/* Copy over transform origin. */
mTransformOrigin[0] = aSource.mTransformOrigin[0];
mTransformOrigin[1] = aSource.mTransformOrigin[1];
}
nsChangeHint nsStyleDisplay::CalcDifference(const nsStyleDisplay& aOther) const
{
nsChangeHint hint = nsChangeHint(0);
if (!EqualURIs(mBinding, aOther.mBinding)
|| mPosition != aOther.mPosition
|| mDisplay != aOther.mDisplay
|| (mFloats == NS_STYLE_FLOAT_NONE) != (aOther.mFloats == NS_STYLE_FLOAT_NONE)
|| mOverflowX != aOther.mOverflowX
|| mOverflowY != aOther.mOverflowY
|| mResize != aOther.mResize)
NS_UpdateHint(hint, nsChangeHint_ReconstructFrame);
if (mFloats != aOther.mFloats) {
// Changing which side we float on doesn't affect descendants directly
NS_UpdateHint(hint,
NS_SubtractHint(nsChangeHint_ReflowFrame,
NS_CombineHint(nsChangeHint_ClearDescendantIntrinsics,
nsChangeHint_NeedDirtyReflow)));
}
// XXX the following is conservative, for now: changing float breaking shouldn't
// necessarily require a repaint, reflow should suffice.
if (mBreakType != aOther.mBreakType
|| mBreakBefore != aOther.mBreakBefore
|| mBreakAfter != aOther.mBreakAfter
|| mAppearance != aOther.mAppearance
|| mClipFlags != aOther.mClipFlags || mClip != aOther.mClip)
NS_UpdateHint(hint, NS_CombineHint(nsChangeHint_ReflowFrame, nsChangeHint_RepaintFrame));
if (mOpacity != aOther.mOpacity) {
NS_UpdateHint(hint, nsChangeHint_UpdateOpacityLayer);
}
/* If we've added or removed the transform property, we need to reconstruct the frame to add
* or remove the view object, and also to handle abs-pos and fixed-pos containers.
*/
if (HasTransform() != aOther.HasTransform()) {
NS_UpdateHint(hint, nsChangeHint_ReconstructFrame);
}
else if (HasTransform()) {
/* Otherwise, if we've kept the property lying around and we already had a
* transform, we need to see whether or not we've changed the transform.
* If so, we need to do a reflow and a repaint. The reflow is to recompute
* the overflow rect (which probably changed if the transform changed)
* and to redraw within the bounds of that new overflow rect.
*/
if (mTransform != aOther.mTransform)
NS_UpdateHint(hint, NS_CombineHint(nsChangeHint_ReflowFrame,
nsChangeHint_UpdateTransformLayer));
for (PRUint8 index = 0; index < 2; ++index)
if (mTransformOrigin[index] != aOther.mTransformOrigin[index]) {
NS_UpdateHint(hint, NS_CombineHint(nsChangeHint_ReflowFrame,
nsChangeHint_RepaintFrame));
break;
}
}
// Note: Our current behavior for handling changes to the
// transition-duration, transition-delay, and transition-timing-function
// properties is to do nothing. In other words, the transition
// property that matters is what it is when the transition begins, and
// we don't stop a transition later because the transition property
// changed.
// We do handle changes to transition-property, but we don't need to
// bother with anything here, since the transition manager is notified
// of any style context change anyway.
return hint;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleDisplay::MaxDifference()
{
// All the parts of FRAMECHANGE are present above in CalcDifference.
return nsChangeHint(NS_STYLE_HINT_FRAMECHANGE | nsChangeHint_UpdateOpacityLayer |
nsChangeHint_UpdateTransformLayer);
}
#endif
// --------------------
// nsStyleVisibility
//
nsStyleVisibility::nsStyleVisibility(nsPresContext* aPresContext)
{
MOZ_COUNT_CTOR(nsStyleVisibility);
PRUint32 bidiOptions = aPresContext->GetBidi();
if (GET_BIDI_OPTION_DIRECTION(bidiOptions) == IBMBIDI_TEXTDIRECTION_RTL)
mDirection = NS_STYLE_DIRECTION_RTL;
else
mDirection = NS_STYLE_DIRECTION_LTR;
nsAutoString language;
aPresContext->Document()->GetContentLanguage(language);
language.StripWhitespace();
// Content-Language may be a comma-separated list of language codes,
// in which case the HTML5 spec says to treat it as unknown
if (!language.IsEmpty() &&
language.FindChar(PRUnichar(',')) == kNotFound) {
mLanguage = do_GetAtom(language);
} else {
// we didn't find a (usable) Content-Language, so we fall back
// to whatever the presContext guessed from the charset
mLanguage = aPresContext->GetLanguageFromCharset();
}
mVisible = NS_STYLE_VISIBILITY_VISIBLE;
mPointerEvents = NS_STYLE_POINTER_EVENTS_AUTO;
}
nsStyleVisibility::nsStyleVisibility(const nsStyleVisibility& aSource)
{
MOZ_COUNT_CTOR(nsStyleVisibility);
mDirection = aSource.mDirection;
mVisible = aSource.mVisible;
mLanguage = aSource.mLanguage;
mPointerEvents = aSource.mPointerEvents;
}
nsChangeHint nsStyleVisibility::CalcDifference(const nsStyleVisibility& aOther) const
{
if ((mDirection == aOther.mDirection) &&
(mLanguage == aOther.mLanguage)) {
if ((mVisible == aOther.mVisible)) {
return NS_STYLE_HINT_NONE;
}
if ((NS_STYLE_VISIBILITY_COLLAPSE == mVisible) ||
(NS_STYLE_VISIBILITY_COLLAPSE == aOther.mVisible)) {
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_VISUAL;
}
return NS_STYLE_HINT_REFLOW;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleVisibility::MaxDifference()
{
return NS_STYLE_HINT_REFLOW;
}
#endif
nsStyleContentData::~nsStyleContentData()
{
NS_ABORT_IF_FALSE(!mImageTracked,
"nsStyleContentData being destroyed while still tracking image!");
if (mType == eStyleContentType_Image) {
NS_IF_RELEASE(mContent.mImage);
} else if (mType == eStyleContentType_Counter ||
mType == eStyleContentType_Counters) {
mContent.mCounters->Release();
} else if (mContent.mString) {
NS_Free(mContent.mString);
}
}
nsStyleContentData& nsStyleContentData::operator=(const nsStyleContentData& aOther)
{
if (this == &aOther)
return *this;
this->~nsStyleContentData();
new (this) nsStyleContentData();
mType = aOther.mType;
if (mType == eStyleContentType_Image) {
mContent.mImage = aOther.mContent.mImage;
NS_IF_ADDREF(mContent.mImage);
} else if (mType == eStyleContentType_Counter ||
mType == eStyleContentType_Counters) {
mContent.mCounters = aOther.mContent.mCounters;
mContent.mCounters->AddRef();
} else if (aOther.mContent.mString) {
mContent.mString = NS_strdup(aOther.mContent.mString);
} else {
mContent.mString = nsnull;
}
return *this;
}
PRBool nsStyleContentData::operator==(const nsStyleContentData& aOther) const
{
if (mType != aOther.mType)
return PR_FALSE;
if (mType == eStyleContentType_Image) {
if (!mContent.mImage || !aOther.mContent.mImage)
return mContent.mImage == aOther.mContent.mImage;
PRBool eq;
nsCOMPtr<nsIURI> thisURI, otherURI;
mContent.mImage->GetURI(getter_AddRefs(thisURI));
aOther.mContent.mImage->GetURI(getter_AddRefs(otherURI));
return thisURI == otherURI || // handles null==null
(thisURI && otherURI &&
NS_SUCCEEDED(thisURI->Equals(otherURI, &eq)) &&
eq);
}
if (mType == eStyleContentType_Counter ||
mType == eStyleContentType_Counters)
return *mContent.mCounters == *aOther.mContent.mCounters;
return nsCRT::strcmp(mContent.mString, aOther.mContent.mString) == 0;
}
void
nsStyleContentData::TrackImage(nsPresContext* aContext)
{
// Sanity
NS_ABORT_IF_FALSE(!mImageTracked, "Already tracking image!");
NS_ABORT_IF_FALSE(mType == eStyleContentType_Image,
"Tryingto do image tracking on non-image!");
NS_ABORT_IF_FALSE(mContent.mImage,
"Can't track image when there isn't one!");
// Register the image with the document
nsIDocument* doc = aContext->Document();
if (doc)
doc->AddImage(mContent.mImage);
// Mark state
#ifdef DEBUG
mImageTracked = true;
#endif
}
void
nsStyleContentData::UntrackImage(nsPresContext* aContext)
{
// Sanity
NS_ABORT_IF_FALSE(mImageTracked, "Image not tracked!");
NS_ABORT_IF_FALSE(mType == eStyleContentType_Image,
"Trying to do image tracking on non-image!");
NS_ABORT_IF_FALSE(mContent.mImage,
"Can't untrack image when there isn't one!");
// Unregister the image with the document
nsIDocument* doc = aContext->Document();
if (doc)
doc->RemoveImage(mContent.mImage);
// Mark state
#ifdef DEBUG
mImageTracked = false;
#endif
}
//-----------------------
// nsStyleContent
//
nsStyleContent::nsStyleContent(void)
: mMarkerOffset(),
mContents(nsnull),
mIncrements(nsnull),
mResets(nsnull),
mContentCount(0),
mIncrementCount(0),
mResetCount(0)
{
MOZ_COUNT_CTOR(nsStyleContent);
mMarkerOffset.SetAutoValue();
}
nsStyleContent::~nsStyleContent(void)
{
MOZ_COUNT_DTOR(nsStyleContent);
DELETE_ARRAY_IF(mContents);
DELETE_ARRAY_IF(mIncrements);
DELETE_ARRAY_IF(mResets);
}
void
nsStyleContent::Destroy(nsPresContext* aContext)
{
// Unregister any images we might have with the document.
for (PRUint32 i = 0; i < mContentCount; ++i) {
if ((mContents[i].mType == eStyleContentType_Image) &&
mContents[i].mContent.mImage) {
mContents[i].UntrackImage(aContext);
}
}
this->~nsStyleContent();
aContext->FreeToShell(sizeof(nsStyleContent), this);
}
nsStyleContent::nsStyleContent(const nsStyleContent& aSource)
:mMarkerOffset(),
mContents(nsnull),
mIncrements(nsnull),
mResets(nsnull),
mContentCount(0),
mIncrementCount(0),
mResetCount(0)
{
MOZ_COUNT_CTOR(nsStyleContent);
mMarkerOffset = aSource.mMarkerOffset;
PRUint32 index;
if (NS_SUCCEEDED(AllocateContents(aSource.ContentCount()))) {
for (index = 0; index < mContentCount; index++) {
ContentAt(index) = aSource.ContentAt(index);
}
}
if (NS_SUCCEEDED(AllocateCounterIncrements(aSource.CounterIncrementCount()))) {
for (index = 0; index < mIncrementCount; index++) {
const nsStyleCounterData *data = aSource.GetCounterIncrementAt(index);
mIncrements[index].mCounter = data->mCounter;
mIncrements[index].mValue = data->mValue;
}
}
if (NS_SUCCEEDED(AllocateCounterResets(aSource.CounterResetCount()))) {
for (index = 0; index < mResetCount; index++) {
const nsStyleCounterData *data = aSource.GetCounterResetAt(index);
mResets[index].mCounter = data->mCounter;
mResets[index].mValue = data->mValue;
}
}
}
nsChangeHint nsStyleContent::CalcDifference(const nsStyleContent& aOther) const
{
// In ReResolveStyleContext we assume that if there's no existing
// ::before or ::after and we don't have to restyle children of the
// node then we can't end up with a ::before or ::after due to the
// restyle of the node itself. That's not quite true, but the only
// exception to the above is when the 'content' property of the node
// changes and the pseudo-element inherits the changed value. Since
// the code here triggers a frame change on the node in that case,
// the optimization in ReResolveStyleContext is ok. But if we ever
// change this code to not reconstruct frames on changes to the
// 'content' property, then we will need to revisit the optimization
// in ReResolveStyleContext.
if (mContentCount != aOther.mContentCount ||
mIncrementCount != aOther.mIncrementCount ||
mResetCount != aOther.mResetCount) {
return NS_STYLE_HINT_FRAMECHANGE;
}
PRUint32 ix = mContentCount;
while (0 < ix--) {
if (mContents[ix] != aOther.mContents[ix]) {
// Unfortunately we need to reframe here; a simple reflow
// will not pick up different text or different image URLs,
// since we set all that up in the CSSFrameConstructor
return NS_STYLE_HINT_FRAMECHANGE;
}
}
ix = mIncrementCount;
while (0 < ix--) {
if ((mIncrements[ix].mValue != aOther.mIncrements[ix].mValue) ||
(mIncrements[ix].mCounter != aOther.mIncrements[ix].mCounter)) {
return NS_STYLE_HINT_FRAMECHANGE;
}
}
ix = mResetCount;
while (0 < ix--) {
if ((mResets[ix].mValue != aOther.mResets[ix].mValue) ||
(mResets[ix].mCounter != aOther.mResets[ix].mCounter)) {
return NS_STYLE_HINT_FRAMECHANGE;
}
}
if (mMarkerOffset != aOther.mMarkerOffset) {
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_NONE;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleContent::MaxDifference()
{
return NS_STYLE_HINT_FRAMECHANGE;
}
#endif
nsresult nsStyleContent::AllocateContents(PRUint32 aCount)
{
// We need to run the destructors of the elements of mContents, so we
// delete and reallocate even if aCount == mContentCount. (If
// nsStyleContentData had its members private and managed their
// ownership on setting, we wouldn't need this, but that seems
// unnecessary at this point.)
DELETE_ARRAY_IF(mContents);
if (aCount) {
mContents = new nsStyleContentData[aCount];
if (! mContents) {
mContentCount = 0;
return NS_ERROR_OUT_OF_MEMORY;
}
}
mContentCount = aCount;
return NS_OK;
}
// ---------------------
// nsStyleQuotes
//
nsStyleQuotes::nsStyleQuotes(void)
: mQuotesCount(0),
mQuotes(nsnull)
{
MOZ_COUNT_CTOR(nsStyleQuotes);
SetInitial();
}
nsStyleQuotes::~nsStyleQuotes(void)
{
MOZ_COUNT_DTOR(nsStyleQuotes);
DELETE_ARRAY_IF(mQuotes);
}
nsStyleQuotes::nsStyleQuotes(const nsStyleQuotes& aSource)
: mQuotesCount(0),
mQuotes(nsnull)
{
MOZ_COUNT_CTOR(nsStyleQuotes);
CopyFrom(aSource);
}
void
nsStyleQuotes::SetInitial()
{
// The initial value for quotes is the en-US typographic convention:
// outermost are LEFT and RIGHT DOUBLE QUOTATION MARK, alternating
// with LEFT and RIGHT SINGLE QUOTATION MARK.
static const PRUnichar initialQuotes[8] = {
0x201C, 0, 0x201D, 0, 0x2018, 0, 0x2019, 0
};
if (NS_SUCCEEDED(AllocateQuotes(2))) {
SetQuotesAt(0,
nsDependentString(&initialQuotes[0], 1),
nsDependentString(&initialQuotes[2], 1));
SetQuotesAt(1,
nsDependentString(&initialQuotes[4], 1),
nsDependentString(&initialQuotes[6], 1));
}
}
void
nsStyleQuotes::CopyFrom(const nsStyleQuotes& aSource)
{
if (NS_SUCCEEDED(AllocateQuotes(aSource.QuotesCount()))) {
PRUint32 count = (mQuotesCount * 2);
for (PRUint32 index = 0; index < count; index += 2) {
aSource.GetQuotesAt(index, mQuotes[index], mQuotes[index + 1]);
}
}
}
nsChangeHint nsStyleQuotes::CalcDifference(const nsStyleQuotes& aOther) const
{
// If the quotes implementation is ever going to change we might not need
// a framechange here and a reflow should be sufficient. See bug 35768.
if (mQuotesCount == aOther.mQuotesCount) {
PRUint32 ix = (mQuotesCount * 2);
while (0 < ix--) {
if (mQuotes[ix] != aOther.mQuotes[ix]) {
return NS_STYLE_HINT_FRAMECHANGE;
}
}
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_FRAMECHANGE;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleQuotes::MaxDifference()
{
return NS_STYLE_HINT_FRAMECHANGE;
}
#endif
// --------------------
// nsStyleTextReset
//
nsStyleTextReset::nsStyleTextReset(void)
{
MOZ_COUNT_CTOR(nsStyleTextReset);
mVerticalAlign.SetIntValue(NS_STYLE_VERTICAL_ALIGN_BASELINE, eStyleUnit_Enumerated);
mTextDecoration = NS_STYLE_TEXT_DECORATION_NONE;
mUnicodeBidi = NS_STYLE_UNICODE_BIDI_NORMAL;
}
nsStyleTextReset::nsStyleTextReset(const nsStyleTextReset& aSource)
{
MOZ_COUNT_CTOR(nsStyleTextReset);
memcpy((nsStyleTextReset*)this, &aSource, sizeof(nsStyleTextReset));
}
nsStyleTextReset::~nsStyleTextReset(void)
{
MOZ_COUNT_DTOR(nsStyleTextReset);
}
nsChangeHint nsStyleTextReset::CalcDifference(const nsStyleTextReset& aOther) const
{
if (mVerticalAlign == aOther.mVerticalAlign
&& mUnicodeBidi == aOther.mUnicodeBidi) {
if (mTextDecoration != aOther.mTextDecoration) {
// Reflow for blink changes, repaint for others
return
(mTextDecoration & NS_STYLE_TEXT_DECORATION_BLINK) ==
(aOther.mTextDecoration & NS_STYLE_TEXT_DECORATION_BLINK) ?
NS_STYLE_HINT_VISUAL : NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_NONE;
}
return NS_STYLE_HINT_REFLOW;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleTextReset::MaxDifference()
{
return NS_STYLE_HINT_REFLOW;
}
#endif
// Allowed to return one of NS_STYLE_HINT_NONE, NS_STYLE_HINT_REFLOW
// or NS_STYLE_HINT_VISUAL. Currently we just return NONE or REFLOW, though.
// XXXbz can this not return a more specific hint? If that's ever
// changed, nsStyleBorder::CalcDifference will need changing too.
static nsChangeHint
CalcShadowDifference(nsCSSShadowArray* lhs,
nsCSSShadowArray* rhs)
{
if (lhs == rhs)
return NS_STYLE_HINT_NONE;
if (!lhs || !rhs || lhs->Length() != rhs->Length())
return NS_STYLE_HINT_REFLOW;
for (PRUint32 i = 0; i < lhs->Length(); ++i) {
if (*lhs->ShadowAt(i) != *rhs->ShadowAt(i))
return NS_STYLE_HINT_REFLOW;
}
return NS_STYLE_HINT_NONE;
}
// --------------------
// nsStyleText
//
nsStyleText::nsStyleText(void)
{
MOZ_COUNT_CTOR(nsStyleText);
mTextAlign = NS_STYLE_TEXT_ALIGN_DEFAULT;
mTextTransform = NS_STYLE_TEXT_TRANSFORM_NONE;
mWhiteSpace = NS_STYLE_WHITESPACE_NORMAL;
mWordWrap = NS_STYLE_WORDWRAP_NORMAL;
mLetterSpacing.SetNormalValue();
mLineHeight.SetNormalValue();
mTextIndent.SetCoordValue(0);
mWordSpacing = 0;
mTextShadow = nsnull;
mTabSize = NS_STYLE_TABSIZE_INITIAL;
}
nsStyleText::nsStyleText(const nsStyleText& aSource)
: mTextAlign(aSource.mTextAlign),
mTextTransform(aSource.mTextTransform),
mWhiteSpace(aSource.mWhiteSpace),
mWordWrap(aSource.mWordWrap),
mTabSize(aSource.mTabSize),
mLetterSpacing(aSource.mLetterSpacing),
mLineHeight(aSource.mLineHeight),
mTextIndent(aSource.mTextIndent),
mWordSpacing(aSource.mWordSpacing),
mTextShadow(aSource.mTextShadow)
{
MOZ_COUNT_CTOR(nsStyleText);
}
nsStyleText::~nsStyleText(void)
{
MOZ_COUNT_DTOR(nsStyleText);
}
nsChangeHint nsStyleText::CalcDifference(const nsStyleText& aOther) const
{
if (NewlineIsSignificant() != aOther.NewlineIsSignificant()) {
// This may require construction of suppressed text frames
return NS_STYLE_HINT_FRAMECHANGE;
}
if ((mTextAlign != aOther.mTextAlign) ||
(mTextTransform != aOther.mTextTransform) ||
(mWhiteSpace != aOther.mWhiteSpace) ||
(mWordWrap != aOther.mWordWrap) ||
(mLetterSpacing != aOther.mLetterSpacing) ||
(mLineHeight != aOther.mLineHeight) ||
(mTextIndent != aOther.mTextIndent) ||
(mWordSpacing != aOther.mWordSpacing) ||
(mTabSize != aOther.mTabSize))
return NS_STYLE_HINT_REFLOW;
return CalcShadowDifference(mTextShadow, aOther.mTextShadow);
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleText::MaxDifference()
{
return NS_STYLE_HINT_FRAMECHANGE;
}
#endif
//-----------------------
// nsStyleUserInterface
//
nsCursorImage::nsCursorImage()
: mHaveHotspot(PR_FALSE)
, mHotspotX(0.0f)
, mHotspotY(0.0f)
{
}
nsCursorImage::nsCursorImage(const nsCursorImage& aOther)
: mHaveHotspot(aOther.mHaveHotspot)
, mHotspotX(aOther.mHotspotX)
, mHotspotY(aOther.mHotspotY)
{
SetImage(aOther.GetImage());
}
nsCursorImage::~nsCursorImage()
{
SetImage(nsnull);
}
nsCursorImage&
nsCursorImage::operator=(const nsCursorImage& aOther)
{
if (this != &aOther) {
mHaveHotspot = aOther.mHaveHotspot;
mHotspotX = aOther.mHotspotX;
mHotspotY = aOther.mHotspotY;
SetImage(aOther.GetImage());
}
return *this;
}
nsStyleUserInterface::nsStyleUserInterface(void)
{
MOZ_COUNT_CTOR(nsStyleUserInterface);
mUserInput = NS_STYLE_USER_INPUT_AUTO;
mUserModify = NS_STYLE_USER_MODIFY_READ_ONLY;
mUserFocus = NS_STYLE_USER_FOCUS_NONE;
mCursor = NS_STYLE_CURSOR_AUTO; // fix for bugzilla bug 51113
mCursorArrayLength = 0;
mCursorArray = nsnull;
}
nsStyleUserInterface::nsStyleUserInterface(const nsStyleUserInterface& aSource) :
mUserInput(aSource.mUserInput),
mUserModify(aSource.mUserModify),
mUserFocus(aSource.mUserFocus),
mCursor(aSource.mCursor)
{
MOZ_COUNT_CTOR(nsStyleUserInterface);
CopyCursorArrayFrom(aSource);
}
nsStyleUserInterface::~nsStyleUserInterface(void)
{
MOZ_COUNT_DTOR(nsStyleUserInterface);
delete [] mCursorArray;
}
nsChangeHint nsStyleUserInterface::CalcDifference(const nsStyleUserInterface& aOther) const
{
nsChangeHint hint = nsChangeHint(0);
if (mCursor != aOther.mCursor)
NS_UpdateHint(hint, nsChangeHint_UpdateCursor);
// We could do better. But it wouldn't be worth it, URL-specified cursors are
// rare.
if (mCursorArrayLength > 0 || aOther.mCursorArrayLength > 0)
NS_UpdateHint(hint, nsChangeHint_UpdateCursor);
if (mUserModify != aOther.mUserModify)
NS_UpdateHint(hint, NS_STYLE_HINT_VISUAL);
if ((mUserInput != aOther.mUserInput) &&
((NS_STYLE_USER_INPUT_NONE == mUserInput) ||
(NS_STYLE_USER_INPUT_NONE == aOther.mUserInput))) {
NS_UpdateHint(hint, NS_STYLE_HINT_FRAMECHANGE);
}
// ignore mUserFocus
return hint;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleUserInterface::MaxDifference()
{
return nsChangeHint(nsChangeHint_UpdateCursor | NS_STYLE_HINT_FRAMECHANGE);
}
#endif
void
nsStyleUserInterface::CopyCursorArrayFrom(const nsStyleUserInterface& aSource)
{
mCursorArray = nsnull;
mCursorArrayLength = 0;
if (aSource.mCursorArrayLength) {
mCursorArray = new nsCursorImage[aSource.mCursorArrayLength];
if (mCursorArray) {
mCursorArrayLength = aSource.mCursorArrayLength;
for (PRUint32 i = 0; i < mCursorArrayLength; ++i)
mCursorArray[i] = aSource.mCursorArray[i];
}
}
}
//-----------------------
// nsStyleUIReset
//
nsStyleUIReset::nsStyleUIReset(void)
{
MOZ_COUNT_CTOR(nsStyleUIReset);
mUserSelect = NS_STYLE_USER_SELECT_AUTO;
mForceBrokenImageIcon = 0;
mIMEMode = NS_STYLE_IME_MODE_AUTO;
mWindowShadow = NS_STYLE_WINDOW_SHADOW_DEFAULT;
}
nsStyleUIReset::nsStyleUIReset(const nsStyleUIReset& aSource)
{
MOZ_COUNT_CTOR(nsStyleUIReset);
mUserSelect = aSource.mUserSelect;
mForceBrokenImageIcon = aSource.mForceBrokenImageIcon;
mIMEMode = aSource.mIMEMode;
mWindowShadow = aSource.mWindowShadow;
}
nsStyleUIReset::~nsStyleUIReset(void)
{
MOZ_COUNT_DTOR(nsStyleUIReset);
}
nsChangeHint nsStyleUIReset::CalcDifference(const nsStyleUIReset& aOther) const
{
// ignore mIMEMode
if (mForceBrokenImageIcon != aOther.mForceBrokenImageIcon)
return NS_STYLE_HINT_FRAMECHANGE;
if (mWindowShadow != aOther.mWindowShadow) {
// We really need just an nsChangeHint_SyncFrameView, except
// on an ancestor of the frame, so we get that by doing a
// reflow.
return NS_STYLE_HINT_REFLOW;
}
if (mUserSelect != aOther.mUserSelect)
return NS_STYLE_HINT_VISUAL;
return NS_STYLE_HINT_NONE;
}
#ifdef DEBUG
/* static */
nsChangeHint nsStyleUIReset::MaxDifference()
{
return NS_STYLE_HINT_FRAMECHANGE;
}
#endif
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