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nsStyleStruct.cpp
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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 <matspal@gmail.com>
* 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 "nsIWidget.h"
#include "nsIStyleRule.h"
#include "nsCRTGlue.h"
#include "nsCSSProps.h"
#include "nsCOMPtr.h"
#include "nsIFrame.h"
#include "nsHTMLReflowState.h"
#include "prenv.h"
#include "nsSVGUtils.h"
#include "nsBidiUtils.h"
#include "nsLayoutUtils.h"
#include "imgIRequest.h"
#include "imgIContainer.h"
#include "prlog.h"
MOZ_STATIC_ASSERT((((1 << nsStyleStructID_Length) - 1) &
~(NS_STYLE_INHERIT_MASK)) == 0,
"Not enough bits in NS_STYLE_INHERIT_MASK");
inline bool IsFixedUnit(const nsStyleCoord& aCoord, bool aEnumOK)
{
return aCoord.ConvertsToLength() ||
(aEnumOK && aCoord.GetUnit() == eStyleUnit_Enumerated);
}
static bool EqualURIs(nsIURI *aURI1, nsIURI *aURI2)
{
bool eq;
return aURI1 == aURI2 || // handle null==null, and optimize
(aURI1 && aURI2 &&
NS_SUCCEEDED(aURI1->Equals(aURI2, &eq)) && // not equal on fail
eq);
}
static bool EqualURIs(nsCSSValue::URL *aURI1, nsCSSValue::URL *aURI2)
{
return aURI1 == aURI2 || // handle null==null, and optimize
(aURI1 && aURI2 && aURI1->URIEquals(*aURI2));
}
static bool EqualImages(imgIRequest *aImage1, imgIRequest* aImage2)
{
if (aImage1 == aImage2) {
return true;
}
if (!aImage1 || !aImage2) {
return false;
}
nsCOMPtr<nsIURI> uri1, uri2;
aImage1->GetURI(getter_AddRefs(uri1));
aImage2->GetURI(getter_AddRefs(uri2));
return EqualURIs(uri1, uri2);
}
// A nullsafe wrapper for strcmp. We depend on null-safety.
static int safe_strcmp(const PRUnichar* a, const PRUnichar* b)
{
if (!a || !b) {
return (int)(a - b);
}
return NS_strcmp(a, b);
}
static nsChangeHint CalcShadowDifference(nsCSSShadowArray* lhs,
nsCSSShadowArray* rhs);
// --------------------
// nsStyleFont
//
nsStyleFont::nsStyleFont(const nsFont& aFont, nsPresContext *aPresContext)
: mFont(aFont),
mGenericID(kGenericFont_NONE)
{
MOZ_COUNT_CTOR(nsStyleFont);
Init(aPresContext);
}
nsStyleFont::nsStyleFont(const nsStyleFont& aSrc)
: mFont(aSrc.mFont)
, mSize(aSrc.mSize)
, mGenericID(aSrc.mGenericID)
, mScriptLevel(aSrc.mScriptLevel)
, mScriptUnconstrainedSize(aSrc.mScriptUnconstrainedSize)
, mScriptMinSize(aSrc.mScriptMinSize)
, mScriptSizeMultiplier(aSrc.mScriptSizeMultiplier)
, mLanguage(aSrc.mLanguage)
{
MOZ_COUNT_CTOR(nsStyleFont);
}
nsStyleFont::nsStyleFont(nsPresContext* aPresContext)
// passing nsnull to GetDefaultFont make it use the doc language
: mFont(*(aPresContext->GetDefaultFont(kPresContext_DefaultVariableFont_ID, nsnull))),
mGenericID(kGenericFont_NONE)
{
MOZ_COUNT_CTOR(nsStyleFont);
Init(aPresContext);
}
void
nsStyleFont::Init(nsPresContext* aPresContext)
{
mSize = mFont.size = nsStyleFont::ZoomText(aPresContext, mFont.size);
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;
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();
}
}
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 ||
mLanguage != aOther.mLanguage) {
return NS_STYLE_HINT_REFLOW;
}
return CalcFontDifference(mFont, aOther.mFont);
}
#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.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 bool IsFixedData(const nsStyleSides& aSides, bool aEnumOK)
{
NS_FOR_CSS_SIDES(side) {
if (!IsFixedUnit(aSides.Get(side), aEnumOK))
return false;
}
return 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 = false;
}
nsStyleMargin::nsStyleMargin(const nsStyleMargin& aSrc) {
MOZ_COUNT_CTOR(nsStyleMargin);
mMargin = aSrc.mMargin;
mHasCachedMargin = 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, false)) {
NS_FOR_CSS_SIDES(side) {
mCachedMargin.Side(side) = CalcCoord(mMargin.Get(side), nsnull, 0);
}
mHasCachedMargin = true;
}
else
mHasCachedMargin = 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 = false;
}
nsStylePadding::nsStylePadding(const nsStylePadding& aSrc) {
MOZ_COUNT_CTOR(nsStylePadding);
mPadding = aSrc.mPadding;
mHasCachedPadding = 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, false)) {
NS_FOR_CSS_SIDES(side) {
// Clamp negative calc() to 0.
mCachedPadding.Side(side) =
NS_MAX(CalcCoord(mPadding.Get(side), nsnull, 0), 0);
}
mHasCachedPadding = true;
}
else
mHasCachedPadding = 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(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(bool aDeep) const
{
nsBorderColors* result = new nsBorderColors(mColor);
if (NS_UNLIKELY(!result))
return result;
if (aDeep)
NS_CSS_CLONE_LIST_MEMBER(nsBorderColors, this, mNext, result, (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
bool
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 = 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 = true;
} else if (IsFixedUnit(mOutlineWidth, true)) {
// Clamp negative calc() to 0.
mCachedOutlineWidth =
NS_MAX(CalcCoord(mOutlineWidth, aContext->GetBorderWidthTable(), 3), 0);
mCachedOutlineWidth =
NS_ROUND_BORDER_TO_PIXELS(mCachedOutlineWidth, mTwipsPerPixel);
mHasCachedOutline = true;
}
else
mHasCachedOutline = false;
}
nsChangeHint nsStyleOutline::CalcDifference(const nsStyleOutline& aOther) const
{
bool outlineWasVisible =
mCachedOutlineWidth > 0 && mOutlineStyle != NS_STYLE_BORDER_STYLE_NONE;
bool 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.IsEqualInterior(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 = 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 = 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 bool 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;
}