gecko-dev/layout/style/nsStyleStruct.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* 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 "nsIAppShellService.h"
#include "nsIWidget.h"
#include "nsCRTGlue.h"
#include "nsCSSParser.h"
#include "nsCSSProps.h"
#include "nsDeviceContext.h"
#include "nsStyleUtil.h"
#include "nsCOMPtr.h"
#include "nsBidiUtils.h"
#include "nsLayoutUtils.h"
#include "imgIRequest.h"
#include "imgIContainer.h"
#include "CounterStyleManager.h"
#include "mozilla/dom/AnimationEffectReadOnlyBinding.h" // for PlaybackDirection
#include "mozilla/dom/ImageTracker.h"
#include "mozilla/Likely.h"
#include "nsIURI.h"
#include "nsIDocument.h"
#include <algorithm>
using namespace mozilla;
static_assert((((1 << nsStyleStructID_Length) - 1) &
~(NS_STYLE_INHERIT_MASK)) == 0,
"Not enough bits in NS_STYLE_INHERIT_MASK");
/* static */ const int32_t nsStyleGridLine::kMinLine;
/* static */ const int32_t nsStyleGridLine::kMaxLine;
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
DefinitelyEqualURIs(css::URLValueData* aURI1,
css::URLValueData* aURI2)
{
return aURI1 == aURI2 ||
(aURI1 && aURI2 && aURI1->DefinitelyEqualURIs(*aURI2));
}
static bool
DefinitelyEqualURIsAndPrincipal(css::URLValueData* aURI1,
css::URLValueData* aURI2)
{
return aURI1 == aURI2 ||
(aURI1 && aURI2 && aURI1->DefinitelyEqualURIsAndPrincipal(*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);
}
static bool
DefinitelyEqualImages(nsStyleImageRequest* aRequest1,
nsStyleImageRequest* aRequest2)
{
if (aRequest1 == aRequest2) {
return true;
}
if (!aRequest1 || !aRequest2) {
return false;
}
return aRequest1->DefinitelyEquals(*aRequest2);
}
// A nullsafe wrapper for strcmp. We depend on null-safety.
static int
safe_strcmp(const char16_t* a, const char16_t* b)
{
if (!a || !b) {
return (int)(a - b);
}
return NS_strcmp(a, b);
}
int32_t
StyleStructContext::AppUnitsPerDevPixel()
{
return DeviceContext()->AppUnitsPerDevPixel();
}
nsDeviceContext*
StyleStructContext::HackilyFindSomeDeviceContext()
{
nsCOMPtr<nsIAppShellService> appShell(do_GetService("@mozilla.org/appshell/appShellService;1"));
MOZ_ASSERT(appShell);
nsCOMPtr<mozIDOMWindowProxy> win;
appShell->GetHiddenDOMWindow(getter_AddRefs(win));
return nsLayoutUtils::GetDeviceContextForScreenInfo(static_cast<nsPIDOMWindowOuter*>(win.get()));
}
static bool AreShadowArraysEqual(nsCSSShadowArray* lhs, nsCSSShadowArray* rhs);
// --------------------
// nsStyleFont
//
nsStyleFont::nsStyleFont(const nsFont& aFont, StyleStructContext aContext)
: mFont(aFont)
, mSize(nsStyleFont::ZoomText(aContext, mFont.size))
, mGenericID(kGenericFont_NONE)
, mScriptLevel(0)
, mMathVariant(NS_MATHML_MATHVARIANT_NONE)
, mMathDisplay(NS_MATHML_DISPLAYSTYLE_INLINE)
, mMinFontSizeRatio(100) // 100%
, mExplicitLanguage(false)
, mAllowZoom(true)
, mScriptUnconstrainedSize(mSize)
, mScriptMinSize(nsPresContext::CSSTwipsToAppUnits(
NS_POINTS_TO_TWIPS(NS_MATHML_DEFAULT_SCRIPT_MIN_SIZE_PT)))
, mScriptSizeMultiplier(NS_MATHML_DEFAULT_SCRIPT_SIZE_MULTIPLIER)
, mLanguage(GetLanguage(aContext))
{
MOZ_COUNT_CTOR(nsStyleFont);
mFont.size = mSize;
}
nsStyleFont::nsStyleFont(const nsStyleFont& aSrc)
: mFont(aSrc.mFont)
, mSize(aSrc.mSize)
, mGenericID(aSrc.mGenericID)
, mScriptLevel(aSrc.mScriptLevel)
, mMathVariant(aSrc.mMathVariant)
, mMathDisplay(aSrc.mMathDisplay)
, mMinFontSizeRatio(aSrc.mMinFontSizeRatio)
, mExplicitLanguage(aSrc.mExplicitLanguage)
, mAllowZoom(aSrc.mAllowZoom)
, mScriptUnconstrainedSize(aSrc.mScriptUnconstrainedSize)
, mScriptMinSize(aSrc.mScriptMinSize)
, mScriptSizeMultiplier(aSrc.mScriptSizeMultiplier)
, mLanguage(aSrc.mLanguage)
{
MOZ_COUNT_CTOR(nsStyleFont);
}
nsStyleFont::nsStyleFont(StyleStructContext aContext)
: nsStyleFont(*aContext.GetDefaultFont(kPresContext_DefaultVariableFont_ID),
aContext)
{
}
void
nsStyleFont::Destroy(nsPresContext* aContext) {
this->~nsStyleFont();
aContext->PresShell()->
FreeByObjectID(eArenaObjectID_nsStyleFont, this);
}
void
nsStyleFont::EnableZoom(nsPresContext* aContext, bool aEnable)
{
if (mAllowZoom == aEnable) {
return;
}
mAllowZoom = aEnable;
if (mAllowZoom) {
mSize = nsStyleFont::ZoomText(aContext, mSize);
mFont.size = nsStyleFont::ZoomText(aContext, mFont.size);
mScriptUnconstrainedSize =
nsStyleFont::ZoomText(aContext, mScriptUnconstrainedSize);
} else {
mSize = nsStyleFont::UnZoomText(aContext, mSize);
mFont.size = nsStyleFont::UnZoomText(aContext, mFont.size);
mScriptUnconstrainedSize =
nsStyleFont::UnZoomText(aContext, mScriptUnconstrainedSize);
}
}
nsChangeHint
nsStyleFont::CalcDifference(const nsStyleFont& aNewData) const
{
MOZ_ASSERT(mAllowZoom == aNewData.mAllowZoom,
"expected mAllowZoom to be the same on both nsStyleFonts");
if (mSize != aNewData.mSize ||
mFont != aNewData.mFont ||
mLanguage != aNewData.mLanguage ||
mExplicitLanguage != aNewData.mExplicitLanguage ||
mMathVariant != aNewData.mMathVariant ||
mMathDisplay != aNewData.mMathDisplay ||
mMinFontSizeRatio != aNewData.mMinFontSizeRatio) {
return NS_STYLE_HINT_REFLOW;
}
// XXX Should any of these cause a non-nsChangeHint_NeutralChange change?
if (mGenericID != aNewData.mGenericID ||
mScriptLevel != aNewData.mScriptLevel ||
mScriptUnconstrainedSize != aNewData.mScriptUnconstrainedSize ||
mScriptMinSize != aNewData.mScriptMinSize ||
mScriptSizeMultiplier != aNewData.mScriptSizeMultiplier) {
return nsChangeHint_NeutralChange;
}
return nsChangeHint(0);
}
/* static */ nscoord
nsStyleFont::ZoomText(StyleStructContext aContext, nscoord aSize)
{
// aSize can be negative (e.g.: calc(-1px)) so we can't assert that here.
// The caller is expected deal with that.
return NSToCoordTruncClamped(float(aSize) * aContext.TextZoom());
}
/* static */ nscoord
nsStyleFont::UnZoomText(nsPresContext *aPresContext, nscoord aSize)
{
// aSize can be negative (e.g.: calc(-1px)) so we can't assert that here.
// The caller is expected deal with that.
return NSToCoordTruncClamped(float(aSize) / aPresContext->TextZoom());
}
/* static */ already_AddRefed<nsIAtom>
nsStyleFont::GetLanguage(StyleStructContext aContext)
{
RefPtr<nsIAtom> language = aContext.GetContentLanguage();
if (!language) {
// we didn't find a (usable) Content-Language, so we fall back
// to whatever the presContext guessed from the charset
// NOTE this should not be used elsewhere, because we want websites
// to use UTF-8 with proper language tag, instead of relying on
// deriving language from charset. See bug 1040668 comment 67.
language = aContext.GetLanguageFromCharset();
}
return language.forget();
}
static nscoord
CalcCoord(const nsStyleCoord& aCoord, const nscoord* aEnumTable, int32_t aNumEnums)
{
if (aCoord.GetUnit() == eStyleUnit_Enumerated) {
MOZ_ASSERT(aEnumTable, "must have enum table");
int32_t value = aCoord.GetIntValue();
if (0 <= value && value < aNumEnums) {
return aEnumTable[aCoord.GetIntValue()];
}
NS_NOTREACHED("unexpected enum value");
return 0;
}
MOZ_ASSERT(aCoord.ConvertsToLength(), "unexpected unit");
return nsRuleNode::ComputeCoordPercentCalc(aCoord, 0);
}
nsStyleMargin::nsStyleMargin(StyleStructContext aContext)
{
MOZ_COUNT_CTOR(nsStyleMargin);
nsStyleCoord zero(0, nsStyleCoord::CoordConstructor);
NS_FOR_CSS_SIDES(side) {
mMargin.Set(side, zero);
}
}
nsStyleMargin::nsStyleMargin(const nsStyleMargin& aSrc)
: mMargin(aSrc.mMargin)
{
MOZ_COUNT_CTOR(nsStyleMargin);
}
void
nsStyleMargin::Destroy(nsPresContext* aContext) {
this->~nsStyleMargin();
aContext->PresShell()->
FreeByObjectID(eArenaObjectID_nsStyleMargin, this);
}
nsChangeHint
nsStyleMargin::CalcDifference(const nsStyleMargin& aNewData) const
{
if (mMargin == aNewData.mMargin) {
return nsChangeHint(0);
}
// Margin differences can't affect descendant intrinsic sizes and
// don't need to force children to reflow.
return nsChangeHint_NeedReflow |
nsChangeHint_ReflowChangesSizeOrPosition |
nsChangeHint_ClearAncestorIntrinsics;
}
nsStylePadding::nsStylePadding(StyleStructContext aContext)
{
MOZ_COUNT_CTOR(nsStylePadding);
nsStyleCoord zero(0, nsStyleCoord::CoordConstructor);
NS_FOR_CSS_SIDES(side) {
mPadding.Set(side, zero);
}
}
nsStylePadding::nsStylePadding(const nsStylePadding& aSrc)
: mPadding(aSrc.mPadding)
{
MOZ_COUNT_CTOR(nsStylePadding);
}
void
nsStylePadding::Destroy(nsPresContext* aContext) {
this->~nsStylePadding();
aContext->PresShell()->
FreeByObjectID(eArenaObjectID_nsStylePadding, this);
}
nsChangeHint
nsStylePadding::CalcDifference(const nsStylePadding& aNewData) const
{
if (mPadding == aNewData.mPadding) {
return nsChangeHint(0);
}
// 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.
// FIXME: It would be good to return a weaker hint here that doesn't
// force reflow of all descendants, but the hint would need to force
// reflow of the frame's children (see how
// ReflowInput::InitResizeFlags initializes the inline-resize flag).
return NS_STYLE_HINT_REFLOW & ~nsChangeHint_ClearDescendantIntrinsics;
}
nsStyleBorder::nsStyleBorder(StyleStructContext aContext)
: mBorderColors(nullptr)
, mBorderImageFill(NS_STYLE_BORDER_IMAGE_SLICE_NOFILL)
, mBorderImageRepeatH(NS_STYLE_BORDER_IMAGE_REPEAT_STRETCH)
, mBorderImageRepeatV(NS_STYLE_BORDER_IMAGE_REPEAT_STRETCH)
, mFloatEdge(StyleFloatEdge::ContentBox)
, mBoxDecorationBreak(StyleBoxDecorationBreak::Slice)
, mComputedBorder(0, 0, 0, 0)
{
MOZ_COUNT_CTOR(nsStyleBorder);
NS_FOR_CSS_HALF_CORNERS (corner) {
mBorderRadius.Set(corner, nsStyleCoord(0, nsStyleCoord::CoordConstructor));
}
nscoord medium =
(StaticPresData::Get()->GetBorderWidthTable())[NS_STYLE_BORDER_WIDTH_MEDIUM];
NS_FOR_CSS_SIDES(side) {
mBorderImageSlice.Set(side, nsStyleCoord(1.0f, eStyleUnit_Percent));
mBorderImageWidth.Set(side, nsStyleCoord(1.0f, eStyleUnit_Factor));
mBorderImageOutset.Set(side, nsStyleCoord(0.0f, eStyleUnit_Factor));
mBorder.Side(side) = medium;
mBorderStyle[side] = NS_STYLE_BORDER_STYLE_NONE;
mBorderColor[side] = StyleComplexColor::CurrentColor();
}
mTwipsPerPixel = aContext.DevPixelsToAppUnits(1);
}
nsBorderColors::~nsBorderColors()
{
NS_CSS_DELETE_LIST_MEMBER(nsBorderColors, this, mNext);
}
nsBorderColors*
nsBorderColors::Clone(bool aDeep) const
{
nsBorderColors* result = new nsBorderColors(mColor);
if (MOZ_UNLIKELY(!result)) {
return result;
}
if (aDeep) {
NS_CSS_CLONE_LIST_MEMBER(nsBorderColors, this, mNext, result, (false));
}
return result;
}
nsStyleBorder::nsStyleBorder(const nsStyleBorder& aSrc)
: mBorderColors(nullptr)
, mBorderRadius(aSrc.mBorderRadius)
, mBorderImageSource(aSrc.mBorderImageSource)
, mBorderImageSlice(aSrc.mBorderImageSlice)
, mBorderImageWidth(aSrc.mBorderImageWidth)
, mBorderImageOutset(aSrc.mBorderImageOutset)
, mBorderImageFill(aSrc.mBorderImageFill)
, mBorderImageRepeatH(aSrc.mBorderImageRepeatH)
, mBorderImageRepeatV(aSrc.mBorderImageRepeatV)
, mFloatEdge(aSrc.mFloatEdge)
, mBoxDecorationBreak(aSrc.mBoxDecorationBreak)
, mComputedBorder(aSrc.mComputedBorder)
, mBorder(aSrc.mBorder)
, mTwipsPerPixel(aSrc.mTwipsPerPixel)
{
MOZ_COUNT_CTOR(nsStyleBorder);
if (aSrc.mBorderColors) {
EnsureBorderColors();
for (int32_t i = 0; i < 4; i++) {
if (aSrc.mBorderColors[i]) {
mBorderColors[i] = aSrc.mBorderColors[i]->Clone();
} else {
mBorderColors[i] = nullptr;
}
}
}
NS_FOR_CSS_SIDES(side) {
mBorderStyle[side] = aSrc.mBorderStyle[side];
mBorderColor[side] = aSrc.mBorderColor[side];
}
}
nsStyleBorder::~nsStyleBorder()
{
MOZ_COUNT_DTOR(nsStyleBorder);
if (mBorderColors) {
for (int32_t i = 0; i < 4; i++) {
delete mBorderColors[i];
}
delete [] mBorderColors;
}
}
void
nsStyleBorder::FinishStyle(nsPresContext* aPresContext)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aPresContext->StyleSet()->IsServo());
mBorderImageSource.ResolveImage(aPresContext);
}
nsMargin
nsStyleBorder::GetImageOutset() const
{
// We don't check whether there is a border-image (which is OK since
// the initial values yields 0 outset) so that we don't have to
// reflow to update overflow areas when an image loads.
nsMargin outset;
NS_FOR_CSS_SIDES(s) {
nsStyleCoord coord = mBorderImageOutset.Get(s);
nscoord value;
switch (coord.GetUnit()) {
case eStyleUnit_Coord:
value = coord.GetCoordValue();
break;
case eStyleUnit_Factor:
value = coord.GetFactorValue() * mComputedBorder.Side(s);
break;
default:
NS_NOTREACHED("unexpected CSS unit for image outset");
value = 0;
break;
}
outset.Side(s) = value;
}
return outset;
}
void
nsStyleBorder::Destroy(nsPresContext* aContext)
{
this->~nsStyleBorder();
aContext->PresShell()->
FreeByObjectID(eArenaObjectID_nsStyleBorder, this);
}
nsChangeHint
nsStyleBorder::CalcDifference(const nsStyleBorder& aNewData) const
{
// FIXME: XXXbz: As in nsStylePadding::CalcDifference, many of these
// differences should not need to clear descendant intrinsics.
// FIXME: It would be good to return a weaker hint for the
// GetComputedBorder() differences (and perhaps others) that doesn't
// force reflow of all descendants, but the hint would need to force
// reflow of the frame's children (see how
// ReflowInput::InitResizeFlags initializes the inline-resize flag).
if (mTwipsPerPixel != aNewData.mTwipsPerPixel ||
GetComputedBorder() != aNewData.GetComputedBorder() ||
mFloatEdge != aNewData.mFloatEdge ||
mBorderImageOutset != aNewData.mBorderImageOutset ||
mBoxDecorationBreak != aNewData.mBoxDecorationBreak) {
return NS_STYLE_HINT_REFLOW;
}
NS_FOR_CSS_SIDES(ix) {
// See the explanation in nsChangeHint.h of
// nsChangeHint_BorderStyleNoneChange .
// Furthermore, even though we know *this* side is 0 width, just
// assume a repaint hint for some other change rather than bother
// tracking this result through the rest of the function.
if (HasVisibleStyle(ix) != aNewData.HasVisibleStyle(ix)) {
return nsChangeHint_RepaintFrame |
nsChangeHint_BorderStyleNoneChange;
}
}
// 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 repaint 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] != aNewData.mBorderStyle[ix] ||
mBorderColor[ix] != aNewData.mBorderColor[ix]) {
return nsChangeHint_RepaintFrame;
}
}
if (mBorderRadius != aNewData.mBorderRadius ||
!mBorderColors != !aNewData.mBorderColors) {
return nsChangeHint_RepaintFrame;
}
if (IsBorderImageLoaded() || aNewData.IsBorderImageLoaded()) {
if (mBorderImageSource != aNewData.mBorderImageSource ||
mBorderImageRepeatH != aNewData.mBorderImageRepeatH ||
mBorderImageRepeatV != aNewData.mBorderImageRepeatV ||
mBorderImageSlice != aNewData.mBorderImageSlice ||
mBorderImageFill != aNewData.mBorderImageFill ||
mBorderImageWidth != aNewData.mBorderImageWidth ||
mBorderImageOutset != aNewData.mBorderImageOutset) {
return nsChangeHint_RepaintFrame;
}
}
// Note that at this point if mBorderColors is non-null so is
// aNewData.mBorderColors
if (mBorderColors) {
NS_FOR_CSS_SIDES(ix) {
if (!nsBorderColors::Equal(mBorderColors[ix],
aNewData.mBorderColors[ix])) {
return nsChangeHint_RepaintFrame;
}
}
}
// mBorder is the specified border value. Changes to this don't
// need any change processing, since we operate on the computed
// border values instead.
if (mBorder != aNewData.mBorder) {
return nsChangeHint_NeutralChange;
}
return nsChangeHint(0);
}
nsStyleOutline::nsStyleOutline(StyleStructContext aContext)
: mOutlineWidth(NS_STYLE_BORDER_WIDTH_MEDIUM, eStyleUnit_Enumerated)
, mOutlineOffset(0)
, mOutlineColor(StyleComplexColor::CurrentColor())
, mOutlineStyle(NS_STYLE_BORDER_STYLE_NONE)
, mActualOutlineWidth(0)
, mTwipsPerPixel(aContext.DevPixelsToAppUnits(1))
{
MOZ_COUNT_CTOR(nsStyleOutline);
// spacing values not inherited
nsStyleCoord zero(0, nsStyleCoord::CoordConstructor);
NS_FOR_CSS_HALF_CORNERS(corner) {
mOutlineRadius.Set(corner, zero);
}
}
nsStyleOutline::nsStyleOutline(const nsStyleOutline& aSrc)
: mOutlineRadius(aSrc.mOutlineRadius)
, mOutlineWidth(aSrc.mOutlineWidth)
, mOutlineOffset(aSrc.mOutlineOffset)
, mOutlineColor(aSrc.mOutlineColor)
, mOutlineStyle(aSrc.mOutlineStyle)
, mActualOutlineWidth(aSrc.mActualOutlineWidth)
, mTwipsPerPixel(aSrc.mTwipsPerPixel)
{
MOZ_COUNT_CTOR(nsStyleOutline);
}
void
nsStyleOutline::RecalcData()
{
if (NS_STYLE_BORDER_STYLE_NONE == mOutlineStyle) {
mActualOutlineWidth = 0;
} else {
MOZ_ASSERT(mOutlineWidth.ConvertsToLength() ||
mOutlineWidth.GetUnit() == eStyleUnit_Enumerated);
// Clamp negative calc() to 0.
mActualOutlineWidth =
std::max(CalcCoord(mOutlineWidth,
StaticPresData::Get()->GetBorderWidthTable(), 3), 0);
mActualOutlineWidth =
NS_ROUND_BORDER_TO_PIXELS(mActualOutlineWidth, mTwipsPerPixel);
}
}
nsChangeHint
nsStyleOutline::CalcDifference(const nsStyleOutline& aNewData) const
{
if (mActualOutlineWidth != aNewData.mActualOutlineWidth ||
(mActualOutlineWidth > 0 &&
mOutlineOffset != aNewData.mOutlineOffset)) {
return nsChangeHint_UpdateOverflow |
nsChangeHint_SchedulePaint;
}
if (mOutlineStyle != aNewData.mOutlineStyle ||
mOutlineColor != aNewData.mOutlineColor ||
mOutlineRadius != aNewData.mOutlineRadius) {
if (mActualOutlineWidth > 0) {
return nsChangeHint_RepaintFrame;
}
return nsChangeHint_NeutralChange;
}
if (mOutlineWidth != aNewData.mOutlineWidth ||
mOutlineOffset != aNewData.mOutlineOffset ||
mTwipsPerPixel != aNewData.mTwipsPerPixel) {
return nsChangeHint_NeutralChange;
}
return nsChangeHint(0);
}
// --------------------
// nsStyleList
//
nsStyleList::nsStyleList(StyleStructContext aContext)
: mListStylePosition(NS_STYLE_LIST_STYLE_POSITION_OUTSIDE)
, mCounterStyle(aContext.BuildCounterStyle(NS_LITERAL_STRING("disc")))
{
MOZ_COUNT_CTOR(nsStyleList);
SetQuotesInitial();
}
nsStyleList::~nsStyleList()
{
MOZ_COUNT_DTOR(nsStyleList);
}
nsStyleList::nsStyleList(const nsStyleList& aSource)
: mListStylePosition(aSource.mListStylePosition)
, mListStyleImage(aSource.mListStyleImage)
, mCounterStyle(aSource.mCounterStyle)
, mQuotes(aSource.mQuotes)
, mImageRegion(aSource.mImageRegion)
{
MOZ_COUNT_CTOR(nsStyleList);
}
void
nsStyleList::FinishStyle(nsPresContext* aPresContext)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aPresContext->StyleSet()->IsServo());
if (mListStyleImage && !mListStyleImage->IsResolved()) {
mListStyleImage->Resolve(aPresContext);
}
}
void
nsStyleList::SetQuotesInherit(const nsStyleList* aOther)
{
mQuotes = aOther->mQuotes;
}
void
nsStyleList::SetQuotesInitial()
{
if (!sInitialQuotes) {
// 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 char16_t initialQuotes[8] = {
0x201C, 0, 0x201D, 0, 0x2018, 0, 0x2019, 0
};
sInitialQuotes = new nsStyleQuoteValues;
sInitialQuotes->mQuotePairs.AppendElement(
std::make_pair(nsDependentString(&initialQuotes[0], 1),
nsDependentString(&initialQuotes[2], 1)));
sInitialQuotes->mQuotePairs.AppendElement(
std::make_pair(nsDependentString(&initialQuotes[4], 1),
nsDependentString(&initialQuotes[6], 1)));
}
mQuotes = sInitialQuotes;
}
void
nsStyleList::SetQuotesNone()
{
if (!sNoneQuotes) {
sNoneQuotes = new nsStyleQuoteValues;
}
mQuotes = sNoneQuotes;
}
void
nsStyleList::SetQuotes(nsStyleQuoteValues::QuotePairArray&& aValues)
{
mQuotes = new nsStyleQuoteValues;
mQuotes->mQuotePairs = Move(aValues);
}
const nsStyleQuoteValues::QuotePairArray&
nsStyleList::GetQuotePairs() const
{
return mQuotes->mQuotePairs;
}
nsChangeHint
nsStyleList::CalcDifference(const nsStyleList& aNewData) 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 (mQuotes != aNewData.mQuotes &&
(mQuotes || aNewData.mQuotes) &&
GetQuotePairs() != aNewData.GetQuotePairs()) {
return nsChangeHint_ReconstructFrame;
}
if (mListStylePosition != aNewData.mListStylePosition) {
return nsChangeHint_ReconstructFrame;
}
if (DefinitelyEqualImages(mListStyleImage, aNewData.mListStyleImage) &&
mCounterStyle == aNewData.mCounterStyle) {
if (mImageRegion.IsEqualInterior(aNewData.mImageRegion)) {
return nsChangeHint(0);
}
if (mImageRegion.width == aNewData.mImageRegion.width &&
mImageRegion.height == aNewData.mImageRegion.height) {
return NS_STYLE_HINT_VISUAL;
}
}
return NS_STYLE_HINT_REFLOW;
}
StaticRefPtr<nsStyleQuoteValues>
nsStyleList::sInitialQuotes;
StaticRefPtr<nsStyleQuoteValues>
nsStyleList::sNoneQuotes;
// --------------------
// nsStyleXUL
//
nsStyleXUL::nsStyleXUL(StyleStructContext aContext)
: mBoxFlex(0.0f)
, mBoxOrdinal(1)
, mBoxAlign(StyleBoxAlign::Stretch)
, mBoxDirection(StyleBoxDirection::Normal)
, mBoxOrient(StyleBoxOrient::Horizontal)
, mBoxPack(StyleBoxPack::Start)
, mStretchStack(true)
{
MOZ_COUNT_CTOR(nsStyleXUL);
}
nsStyleXUL::~nsStyleXUL()
{
MOZ_COUNT_DTOR(nsStyleXUL);
}
nsStyleXUL::nsStyleXUL(const nsStyleXUL& aSource)
: mBoxFlex(aSource.mBoxFlex)
, mBoxOrdinal(aSource.mBoxOrdinal)
, mBoxAlign(aSource.mBoxAlign)
, mBoxDirection(aSource.mBoxDirection)
, mBoxOrient(aSource.mBoxOrient)
, mBoxPack(aSource.mBoxPack)
, mStretchStack(aSource.mStretchStack)
{
MOZ_COUNT_CTOR(nsStyleXUL);
}
nsChangeHint
nsStyleXUL::CalcDifference(const nsStyleXUL& aNewData) const
{
if (mBoxAlign == aNewData.mBoxAlign &&
mBoxDirection == aNewData.mBoxDirection &&
mBoxFlex == aNewData.mBoxFlex &&
mBoxOrient == aNewData.mBoxOrient &&
mBoxPack == aNewData.mBoxPack &&
mBoxOrdinal == aNewData.mBoxOrdinal &&
mStretchStack == aNewData.mStretchStack) {
return nsChangeHint(0);
}
if (mBoxOrdinal != aNewData.mBoxOrdinal) {
return nsChangeHint_ReconstructFrame;
}
return NS_STYLE_HINT_REFLOW;
}
// --------------------
// nsStyleColumn
//
/* static */ const uint32_t nsStyleColumn::kMaxColumnCount;
nsStyleColumn::nsStyleColumn(StyleStructContext aContext)
: mColumnCount(NS_STYLE_COLUMN_COUNT_AUTO)
, mColumnWidth(eStyleUnit_Auto)
, mColumnGap(eStyleUnit_Normal)
, mColumnRuleColor(StyleComplexColor::CurrentColor())
, mColumnRuleStyle(NS_STYLE_BORDER_STYLE_NONE)
, mColumnFill(NS_STYLE_COLUMN_FILL_BALANCE)
, mColumnRuleWidth((StaticPresData::Get()
->GetBorderWidthTable())[NS_STYLE_BORDER_WIDTH_MEDIUM])
, mTwipsPerPixel(aContext.AppUnitsPerDevPixel())
{
MOZ_COUNT_CTOR(nsStyleColumn);
}
nsStyleColumn::~nsStyleColumn()
{
MOZ_COUNT_DTOR(nsStyleColumn);
}
nsStyleColumn::nsStyleColumn(const nsStyleColumn& aSource)
: mColumnCount(aSource.mColumnCount)
, mColumnWidth(aSource.mColumnWidth)
, mColumnGap(aSource.mColumnGap)
, mColumnRuleColor(aSource.mColumnRuleColor)
, mColumnRuleStyle(aSource.mColumnRuleStyle)
, mColumnFill(aSource.mColumnFill)
, mColumnRuleWidth(aSource.mColumnRuleWidth)
, mTwipsPerPixel(aSource.mTwipsPerPixel)
{
MOZ_COUNT_CTOR(nsStyleColumn);
}
nsChangeHint
nsStyleColumn::CalcDifference(const nsStyleColumn& aNewData) const
{
if ((mColumnWidth.GetUnit() == eStyleUnit_Auto)
!= (aNewData.mColumnWidth.GetUnit() == eStyleUnit_Auto) ||
mColumnCount != aNewData.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 nsChangeHint_ReconstructFrame;
}
if (mColumnWidth != aNewData.mColumnWidth ||
mColumnGap != aNewData.mColumnGap ||
mColumnFill != aNewData.mColumnFill) {
return NS_STYLE_HINT_REFLOW;
}
if (GetComputedColumnRuleWidth() != aNewData.GetComputedColumnRuleWidth() ||
mColumnRuleStyle != aNewData.mColumnRuleStyle ||
mColumnRuleColor != aNewData.mColumnRuleColor) {
return NS_STYLE_HINT_VISUAL;
}
// XXX Is it right that we never check mTwipsPerPixel to return a
// non-nsChangeHint_NeutralChange hint?
if (mColumnRuleWidth != aNewData.mColumnRuleWidth ||
mTwipsPerPixel != aNewData.mTwipsPerPixel) {
return nsChangeHint_NeutralChange;
}
return nsChangeHint(0);
}
// --------------------
// nsStyleSVG
//
nsStyleSVG::nsStyleSVG(StyleStructContext aContext)
: mFill(eStyleSVGPaintType_Color) // Will be initialized to NS_RGB(0, 0, 0)
, mStroke(eStyleSVGPaintType_None)
, mStrokeDashoffset(0, nsStyleCoord::CoordConstructor)
, mStrokeWidth(nsPresContext::CSSPixelsToAppUnits(1), nsStyleCoord::CoordConstructor)
, mFillOpacity(1.0f)
, mStrokeMiterlimit(4.0f)
, mStrokeOpacity(1.0f)
, mClipRule(StyleFillRule::Nonzero)
, mColorInterpolation(NS_STYLE_COLOR_INTERPOLATION_SRGB)
, mColorInterpolationFilters(NS_STYLE_COLOR_INTERPOLATION_LINEARRGB)
, mFillRule(StyleFillRule::Nonzero)
, mPaintOrder(NS_STYLE_PAINT_ORDER_NORMAL)
, mShapeRendering(NS_STYLE_SHAPE_RENDERING_AUTO)
, mStrokeLinecap(NS_STYLE_STROKE_LINECAP_BUTT)
, mStrokeLinejoin(NS_STYLE_STROKE_LINEJOIN_MITER)
, mTextAnchor(NS_STYLE_TEXT_ANCHOR_START)
, mContextFlags((eStyleSVGOpacitySource_Normal << FILL_OPACITY_SOURCE_SHIFT) |
(eStyleSVGOpacitySource_Normal << STROKE_OPACITY_SOURCE_SHIFT))
{
MOZ_COUNT_CTOR(nsStyleSVG);
}
nsStyleSVG::~nsStyleSVG()
{
MOZ_COUNT_DTOR(nsStyleSVG);
}
nsStyleSVG::nsStyleSVG(const nsStyleSVG& aSource)
: mFill(aSource.mFill)
, mStroke(aSource.mStroke)
, mMarkerEnd(aSource.mMarkerEnd)
, mMarkerMid(aSource.mMarkerMid)
, mMarkerStart(aSource.mMarkerStart)
, mStrokeDasharray(aSource.mStrokeDasharray)
, 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)
, mPaintOrder(aSource.mPaintOrder)
, mShapeRendering(aSource.mShapeRendering)
, mStrokeLinecap(aSource.mStrokeLinecap)
, mStrokeLinejoin(aSource.mStrokeLinejoin)
, mTextAnchor(aSource.mTextAnchor)
, mContextFlags(aSource.mContextFlags)
{
MOZ_COUNT_CTOR(nsStyleSVG);
}
static bool
PaintURIChanged(const nsStyleSVGPaint& aPaint1, const nsStyleSVGPaint& aPaint2)
{
if (aPaint1.Type() != aPaint2.Type()) {
return aPaint1.Type() == eStyleSVGPaintType_Server ||
aPaint2.Type() == eStyleSVGPaintType_Server;
}
return aPaint1.Type() == eStyleSVGPaintType_Server &&
!DefinitelyEqualURIs(aPaint1.GetPaintServer(),
aPaint2.GetPaintServer());
}
nsChangeHint
nsStyleSVG::CalcDifference(const nsStyleSVG& aNewData) const
{
nsChangeHint hint = nsChangeHint(0);
if (!DefinitelyEqualURIs(mMarkerEnd, aNewData.mMarkerEnd) ||
!DefinitelyEqualURIs(mMarkerMid, aNewData.mMarkerMid) ||
!DefinitelyEqualURIs(mMarkerStart, aNewData.mMarkerStart)) {
// Markers currently contribute to nsSVGPathGeometryFrame::mRect,
// so we need a reflow as well as a repaint. No intrinsic sizes need
// to change, so nsChangeHint_NeedReflow is sufficient.
return nsChangeHint_UpdateEffects |
nsChangeHint_NeedReflow |
nsChangeHint_NeedDirtyReflow | // XXX remove me: bug 876085
nsChangeHint_RepaintFrame;
}
if (mFill != aNewData.mFill ||
mStroke != aNewData.mStroke ||
mFillOpacity != aNewData.mFillOpacity ||
mStrokeOpacity != aNewData.mStrokeOpacity) {
hint |= nsChangeHint_RepaintFrame;
if (HasStroke() != aNewData.HasStroke() ||
(!HasStroke() && HasFill() != aNewData.HasFill())) {
// Frame bounds and overflow rects depend on whether we "have" fill or
// stroke. Whether we have stroke or not just changed, or else we have no
// stroke (in which case whether we have fill or not is significant to frame
// bounds) and whether we have fill or not just changed. In either case we
// need to reflow so the frame rect is updated.
// XXXperf this is a waste on non nsSVGPathGeometryFrames.
hint |= nsChangeHint_NeedReflow |
nsChangeHint_NeedDirtyReflow; // XXX remove me: bug 876085
}
if (PaintURIChanged(mFill, aNewData.mFill) ||
PaintURIChanged(mStroke, aNewData.mStroke)) {
hint |= nsChangeHint_UpdateEffects;
}
}
// Stroke currently contributes to nsSVGPathGeometryFrame::mRect, so
// we need a reflow here. No intrinsic sizes need to change, so
// nsChangeHint_NeedReflow is sufficient.
// Note that stroke-dashoffset does not affect nsSVGPathGeometryFrame::mRect.
// text-anchor changes also require a reflow since it changes frames' rects.
if (mStrokeWidth != aNewData.mStrokeWidth ||
mStrokeMiterlimit != aNewData.mStrokeMiterlimit ||
mStrokeLinecap != aNewData.mStrokeLinecap ||
mStrokeLinejoin != aNewData.mStrokeLinejoin ||
mTextAnchor != aNewData.mTextAnchor) {
return hint |
nsChangeHint_NeedReflow |
nsChangeHint_NeedDirtyReflow | // XXX remove me: bug 876085
nsChangeHint_RepaintFrame;
}
if (hint & nsChangeHint_RepaintFrame) {
return hint; // we don't add anything else below
}
if ( mStrokeDashoffset != aNewData.mStrokeDashoffset ||
mClipRule != aNewData.mClipRule ||
mColorInterpolation != aNewData.mColorInterpolation ||
mColorInterpolationFilters != aNewData.mColorInterpolationFilters ||
mFillRule != aNewData.mFillRule ||
mPaintOrder != aNewData.mPaintOrder ||
mShapeRendering != aNewData.mShapeRendering ||
mStrokeDasharray != aNewData.mStrokeDasharray ||
mContextFlags != aNewData.mContextFlags) {
return hint | nsChangeHint_RepaintFrame;
}
return hint;
}
// --------------------
// StyleBasicShape
nsCSSKeyword
StyleBasicShape::GetShapeTypeName() const
{
switch (mType) {
case StyleBasicShapeType::Polygon:
return eCSSKeyword_polygon;
case StyleBasicShapeType::Circle:
return eCSSKeyword_circle;
case StyleBasicShapeType::Ellipse:
return eCSSKeyword_ellipse;
case StyleBasicShapeType::Inset:
return eCSSKeyword_inset;
}
NS_NOTREACHED("unexpected type");
return eCSSKeyword_UNKNOWN;
}
// --------------------
// nsStyleFilter
//
nsStyleFilter::nsStyleFilter()
: mType(NS_STYLE_FILTER_NONE)
, mDropShadow(nullptr)
{
MOZ_COUNT_CTOR(nsStyleFilter);
}
nsStyleFilter::nsStyleFilter(const nsStyleFilter& aSource)
: mType(NS_STYLE_FILTER_NONE)
, mDropShadow(nullptr)
{
MOZ_COUNT_CTOR(nsStyleFilter);
if (aSource.mType == NS_STYLE_FILTER_URL) {
SetURL(aSource.mURL);
} else if (aSource.mType == NS_STYLE_FILTER_DROP_SHADOW) {
SetDropShadow(aSource.mDropShadow);
} else if (aSource.mType != NS_STYLE_FILTER_NONE) {
SetFilterParameter(aSource.mFilterParameter, aSource.mType);
}
}
nsStyleFilter::~nsStyleFilter()
{
ReleaseRef();
MOZ_COUNT_DTOR(nsStyleFilter);
}
nsStyleFilter&
nsStyleFilter::operator=(const nsStyleFilter& aOther)
{
if (this == &aOther) {
return *this;
}
if (aOther.mType == NS_STYLE_FILTER_URL) {
SetURL(aOther.mURL);
} else if (aOther.mType == NS_STYLE_FILTER_DROP_SHADOW) {
SetDropShadow(aOther.mDropShadow);
} else if (aOther.mType != NS_STYLE_FILTER_NONE) {
SetFilterParameter(aOther.mFilterParameter, aOther.mType);
} else {
ReleaseRef();
mType = NS_STYLE_FILTER_NONE;
}
return *this;
}
bool
nsStyleFilter::operator==(const nsStyleFilter& aOther) const
{
if (mType != aOther.mType) {
return false;
}
if (mType == NS_STYLE_FILTER_URL) {
return DefinitelyEqualURIs(mURL, aOther.mURL);
} else if (mType == NS_STYLE_FILTER_DROP_SHADOW) {
return *mDropShadow == *aOther.mDropShadow;
} else if (mType != NS_STYLE_FILTER_NONE) {
return mFilterParameter == aOther.mFilterParameter;
}
return true;
}
void
nsStyleFilter::ReleaseRef()
{
if (mType == NS_STYLE_FILTER_DROP_SHADOW) {
NS_ASSERTION(mDropShadow, "expected pointer");
mDropShadow->Release();
} else if (mType == NS_STYLE_FILTER_URL) {
NS_ASSERTION(mURL, "expected pointer");
mURL->Release();
}
mURL = nullptr;
}
void
nsStyleFilter::SetFilterParameter(const nsStyleCoord& aFilterParameter,
int32_t aType)
{
ReleaseRef();
mFilterParameter = aFilterParameter;
mType = aType;
}
bool
nsStyleFilter::SetURL(css::URLValue* aURL)
{
ReleaseRef();
mURL = aURL;
mURL->AddRef();
mType = NS_STYLE_FILTER_URL;
return true;
}
void
nsStyleFilter::SetDropShadow(nsCSSShadowArray* aDropShadow)
{
NS_ASSERTION(aDropShadow, "expected pointer");
ReleaseRef();
mDropShadow = aDropShadow;
mDropShadow->AddRef();
mType = NS_STYLE_FILTER_DROP_SHADOW;
}
// --------------------
// nsStyleSVGReset
//
nsStyleSVGReset::nsStyleSVGReset(StyleStructContext aContext)
: mMask(nsStyleImageLayers::LayerType::Mask)
, mStopColor(NS_RGB(0, 0, 0))
, mFloodColor(NS_RGB(0, 0, 0))
, mLightingColor(NS_RGB(255, 255, 255))
, mStopOpacity(1.0f)
, mFloodOpacity(1.0f)
, mDominantBaseline(NS_STYLE_DOMINANT_BASELINE_AUTO)
, mVectorEffect(NS_STYLE_VECTOR_EFFECT_NONE)
, mMaskType(NS_STYLE_MASK_TYPE_LUMINANCE)
{
MOZ_COUNT_CTOR(nsStyleSVGReset);
}
nsStyleSVGReset::~nsStyleSVGReset()
{
MOZ_COUNT_DTOR(nsStyleSVGReset);
}
nsStyleSVGReset::nsStyleSVGReset(const nsStyleSVGReset& aSource)
: mMask(aSource.mMask)
, mClipPath(aSource.mClipPath)
, mStopColor(aSource.mStopColor)
, mFloodColor(aSource.mFloodColor)
, mLightingColor(aSource.mLightingColor)
, mStopOpacity(aSource.mStopOpacity)
, mFloodOpacity(aSource.mFloodOpacity)
, mDominantBaseline(aSource.mDominantBaseline)
, mVectorEffect(aSource.mVectorEffect)
, mMaskType(aSource.mMaskType)
{
MOZ_COUNT_CTOR(nsStyleSVGReset);
}
void
nsStyleSVGReset::Destroy(nsPresContext* aContext)
{
this->~nsStyleSVGReset();
aContext->PresShell()->
FreeByObjectID(mozilla::eArenaObjectID_nsStyleSVGReset, this);
}
void
nsStyleSVGReset::FinishStyle(nsPresContext* aPresContext)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aPresContext->StyleSet()->IsServo());
mMask.ResolveImages(aPresContext);
}
nsChangeHint
nsStyleSVGReset::CalcDifference(const nsStyleSVGReset& aNewData) const
{
nsChangeHint hint = nsChangeHint(0);
if (mClipPath != aNewData.mClipPath) {
hint |= nsChangeHint_UpdateEffects |
nsChangeHint_RepaintFrame;
// clip-path changes require that we update the PreEffectsBBoxProperty,
// which is done during overflow computation.
hint |= nsChangeHint_UpdateOverflow;
}
if (mDominantBaseline != aNewData.mDominantBaseline) {
// XXXjwatt: why NS_STYLE_HINT_REFLOW? Isn't that excessive?
hint |= NS_STYLE_HINT_REFLOW;
} else if (mVectorEffect != aNewData.mVectorEffect) {
// Stroke currently affects nsSVGPathGeometryFrame::mRect, and
// vector-effect affect stroke. As a result we need to reflow if
// vector-effect changes in order to have nsSVGPathGeometryFrame::
// ReflowSVG called to update its mRect. No intrinsic sizes need
// to change so nsChangeHint_NeedReflow is sufficient.
hint |= nsChangeHint_NeedReflow |
nsChangeHint_NeedDirtyReflow | // XXX remove me: bug 876085
nsChangeHint_RepaintFrame;
} else if (mStopColor != aNewData.mStopColor ||
mFloodColor != aNewData.mFloodColor ||
mLightingColor != aNewData.mLightingColor ||
mStopOpacity != aNewData.mStopOpacity ||
mFloodOpacity != aNewData.mFloodOpacity ||
mMaskType != aNewData.mMaskType) {
hint |= nsChangeHint_RepaintFrame;
}
hint |= mMask.CalcDifference(aNewData.mMask,
nsStyleImageLayers::LayerType::Mask);
return hint;
}
// nsStyleSVGPaint implementation
nsStyleSVGPaint::nsStyleSVGPaint(nsStyleSVGPaintType aType)
: mType(aType)
, mFallbackColor(NS_RGB(0, 0, 0))
{
MOZ_ASSERT(aType == nsStyleSVGPaintType(0) ||
aType == eStyleSVGPaintType_None ||
aType == eStyleSVGPaintType_Color);
mPaint.mColor = NS_RGB(0, 0, 0);
}
nsStyleSVGPaint::nsStyleSVGPaint(const nsStyleSVGPaint& aSource)
: nsStyleSVGPaint(nsStyleSVGPaintType(0))
{
Assign(aSource);
}
nsStyleSVGPaint::~nsStyleSVGPaint()
{
Reset();
}
void
nsStyleSVGPaint::Reset()
{
switch (mType) {
case eStyleSVGPaintType_None:
break;
case eStyleSVGPaintType_Color:
mPaint.mColor = NS_RGB(0, 0, 0);
break;
case eStyleSVGPaintType_Server:
mPaint.mPaintServer->Release();
mPaint.mPaintServer = nullptr;
MOZ_FALLTHROUGH;
case eStyleSVGPaintType_ContextFill:
case eStyleSVGPaintType_ContextStroke:
mFallbackColor = NS_RGB(0, 0, 0);
break;
}
mType = nsStyleSVGPaintType(0);
}
nsStyleSVGPaint&
nsStyleSVGPaint::operator=(const nsStyleSVGPaint& aOther)
{
if (this != &aOther) {
Assign(aOther);
}
return *this;
}
void
nsStyleSVGPaint::Assign(const nsStyleSVGPaint& aOther)
{
MOZ_ASSERT(aOther.mType != nsStyleSVGPaintType(0),
"shouldn't copy uninitialized nsStyleSVGPaint");
switch (aOther.mType) {
case eStyleSVGPaintType_None:
SetNone();
break;
case eStyleSVGPaintType_Color:
SetColor(aOther.mPaint.mColor);
break;
case eStyleSVGPaintType_Server:
SetPaintServer(aOther.mPaint.mPaintServer,
aOther.mFallbackColor);
break;
case eStyleSVGPaintType_ContextFill:
case eStyleSVGPaintType_ContextStroke:
SetContextValue(aOther.mType, aOther.mFallbackColor);
break;
}
}
void
nsStyleSVGPaint::SetNone()
{
Reset();
mType = eStyleSVGPaintType_None;
}
void
nsStyleSVGPaint::SetContextValue(nsStyleSVGPaintType aType,
nscolor aFallbackColor)
{
MOZ_ASSERT(aType == eStyleSVGPaintType_ContextFill ||
aType == eStyleSVGPaintType_ContextStroke);
Reset();
mType = aType;
mFallbackColor = aFallbackColor;
}
void
nsStyleSVGPaint::SetColor(nscolor aColor)
{
Reset();
mType = eStyleSVGPaintType_Color;
mPaint.mColor = aColor;
}
void
nsStyleSVGPaint::SetPaintServer(css::URLValue* aPaintServer,
nscolor aFallbackColor)
{
MOZ_ASSERT(aPaintServer);
Reset();
mType = eStyleSVGPaintType_Server;
mPaint.mPaintServer = aPaintServer;
mPaint.mPaintServer->AddRef();
mFallbackColor = aFallbackColor;
}
bool nsStyleSVGPaint::operator==(const nsStyleSVGPaint& aOther) const
{
if (mType != aOther.mType) {
return false;
}
switch (mType) {
case eStyleSVGPaintType_Color:
return mPaint.mColor == aOther.mPaint.mColor;
case eStyleSVGPaintType_Server:
return DefinitelyEqualURIs(mPaint.mPaintServer,
aOther.mPaint.mPaintServer) &&
mFallbackColor == aOther.mFallbackColor;
case eStyleSVGPaintType_ContextFill:
case eStyleSVGPaintType_ContextStroke:
return mFallbackColor == aOther.mFallbackColor;
default:
MOZ_ASSERT(mType == eStyleSVGPaintType_None,
"Unexpected SVG paint type");
return true;
}
}
// --------------------
// nsStylePosition
//
nsStylePosition::nsStylePosition(StyleStructContext aContext)
: mWidth(eStyleUnit_Auto)
, mMinWidth(eStyleUnit_Auto)
, mMaxWidth(eStyleUnit_None)
, mHeight(eStyleUnit_Auto)
, mMinHeight(eStyleUnit_Auto)
, mMaxHeight(eStyleUnit_None)
, mFlexBasis(eStyleUnit_Auto)
, mGridAutoColumnsMin(eStyleUnit_Auto)
, mGridAutoColumnsMax(eStyleUnit_Auto)
, mGridAutoRowsMin(eStyleUnit_Auto)
, mGridAutoRowsMax(eStyleUnit_Auto)
, mGridAutoFlow(NS_STYLE_GRID_AUTO_FLOW_ROW)
, mBoxSizing(StyleBoxSizing::Content)
, mAlignContent(NS_STYLE_ALIGN_NORMAL)
, mAlignItems(NS_STYLE_ALIGN_NORMAL)
, mAlignSelf(NS_STYLE_ALIGN_AUTO)
, mJustifyContent(NS_STYLE_JUSTIFY_NORMAL)
, mJustifyItems(NS_STYLE_JUSTIFY_AUTO)
, mJustifySelf(NS_STYLE_JUSTIFY_AUTO)
, mFlexDirection(NS_STYLE_FLEX_DIRECTION_ROW)
, mFlexWrap(NS_STYLE_FLEX_WRAP_NOWRAP)
, mObjectFit(NS_STYLE_OBJECT_FIT_FILL)
, mOrder(NS_STYLE_ORDER_INITIAL)
, mFlexGrow(0.0f)
, mFlexShrink(1.0f)
, mZIndex(eStyleUnit_Auto)
, mGridColumnGap(nscoord(0), nsStyleCoord::CoordConstructor)
, mGridRowGap(nscoord(0), nsStyleCoord::CoordConstructor)
{
MOZ_COUNT_CTOR(nsStylePosition);
// positioning values not inherited
mObjectPosition.SetInitialPercentValues(0.5f);
nsStyleCoord autoCoord(eStyleUnit_Auto);
NS_FOR_CSS_SIDES(side) {
mOffset.Set(side, autoCoord);
}
// The initial value of grid-auto-columns and grid-auto-rows is 'auto',
// which computes to 'minmax(auto, auto)'.
// Other members get their default constructors
// which initialize them to representations of their respective initial value.
// mGridTemplateAreas: nullptr for 'none'
// mGridTemplate{Rows,Columns}: false and empty arrays for 'none'
// mGrid{Column,Row}{Start,End}: false/0/empty values for 'auto'
}
nsStylePosition::~nsStylePosition()
{
MOZ_COUNT_DTOR(nsStylePosition);
}
nsStylePosition::nsStylePosition(const nsStylePosition& aSource)
: mObjectPosition(aSource.mObjectPosition)
, mOffset(aSource.mOffset)
, mWidth(aSource.mWidth)
, mMinWidth(aSource.mMinWidth)
, mMaxWidth(aSource.mMaxWidth)
, mHeight(aSource.mHeight)
, mMinHeight(aSource.mMinHeight)
, mMaxHeight(aSource.mMaxHeight)
, mFlexBasis(aSource.mFlexBasis)
, mGridAutoColumnsMin(aSource.mGridAutoColumnsMin)
, mGridAutoColumnsMax(aSource.mGridAutoColumnsMax)
, mGridAutoRowsMin(aSource.mGridAutoRowsMin)
, mGridAutoRowsMax(aSource.mGridAutoRowsMax)
, mGridAutoFlow(aSource.mGridAutoFlow)
, mBoxSizing(aSource.mBoxSizing)
, mAlignContent(aSource.mAlignContent)
, mAlignItems(aSource.mAlignItems)
, mAlignSelf(aSource.mAlignSelf)
, mJustifyContent(aSource.mJustifyContent)
, mJustifyItems(aSource.mJustifyItems)
, mJustifySelf(aSource.mJustifySelf)
, mFlexDirection(aSource.mFlexDirection)
, mFlexWrap(aSource.mFlexWrap)
, mObjectFit(aSource.mObjectFit)
, mOrder(aSource.mOrder)
, mFlexGrow(aSource.mFlexGrow)
, mFlexShrink(aSource.mFlexShrink)
, mZIndex(aSource.mZIndex)
, mGridTemplateColumns(aSource.mGridTemplateColumns)
, mGridTemplateRows(aSource.mGridTemplateRows)
, mGridTemplateAreas(aSource.mGridTemplateAreas)
, mGridColumnStart(aSource.mGridColumnStart)
, mGridColumnEnd(aSource.mGridColumnEnd)
, mGridRowStart(aSource.mGridRowStart)
, mGridRowEnd(aSource.mGridRowEnd)
, mGridColumnGap(aSource.mGridColumnGap)
, mGridRowGap(aSource.mGridRowGap)
{
MOZ_COUNT_CTOR(nsStylePosition);
}
static bool
IsAutonessEqual(const nsStyleSides& aSides1, const nsStyleSides& aSides2)
{
NS_FOR_CSS_SIDES(side) {
if ((aSides1.GetUnit(side) == eStyleUnit_Auto) !=
(aSides2.GetUnit(side) == eStyleUnit_Auto)) {
return false;
}
}
return true;
}
nsChangeHint
nsStylePosition::CalcDifference(const nsStylePosition& aNewData,
const nsStyleVisibility* aOldStyleVisibility) const
{
nsChangeHint hint = nsChangeHint(0);
// Changes to "z-index" require a repaint.
if (mZIndex != aNewData.mZIndex) {
hint |= nsChangeHint_RepaintFrame;
}
// Changes to "object-fit" & "object-position" require a repaint. They
// may also require a reflow, if we have a nsSubDocumentFrame, so that we
// can adjust the size & position of the subdocument.
if (mObjectFit != aNewData.mObjectFit ||
mObjectPosition != aNewData.mObjectPosition) {
hint |= nsChangeHint_RepaintFrame |
nsChangeHint_NeedReflow;
}
if (mOrder != aNewData.mOrder) {
// "order" impacts both layout order and stacking order, so we need both a
// reflow and a repaint when it changes. (Technically, we only need a
// reflow if we're in a multi-line flexbox (which we can't be sure about,
// since that's determined by styling on our parent) -- there, "order" can
// affect which flex line we end up on, & hence can affect our sizing by
// changing the group of flex items we're competing with for space.)
return hint |
nsChangeHint_RepaintFrame |
nsChangeHint_AllReflowHints;
}
if (mBoxSizing != aNewData.mBoxSizing) {
// Can affect both widths and heights; just a bad scene.
return hint |
nsChangeHint_AllReflowHints;
}
// Properties that apply to flex items:
// XXXdholbert These should probably be more targeted (bug 819536)
if (mAlignSelf != aNewData.mAlignSelf ||
mFlexBasis != aNewData.mFlexBasis ||
mFlexGrow != aNewData.mFlexGrow ||
mFlexShrink != aNewData.mFlexShrink) {
return hint |
nsChangeHint_AllReflowHints;
}
// Properties that apply to flex containers:
// - flex-direction can swap a flex container between vertical & horizontal.
// - align-items can change the sizing of a flex container & the positioning
// of its children.
// - flex-wrap changes whether a flex container's children are wrapped, which
// impacts their sizing/positioning and hence impacts the container's size.
if (mAlignItems != aNewData.mAlignItems ||
mFlexDirection != aNewData.mFlexDirection ||
mFlexWrap != aNewData.mFlexWrap) {
return hint |
nsChangeHint_AllReflowHints;
}
// Properties that apply to grid containers:
// FIXME: only for grid containers
// (ie. 'display: grid' or 'display: inline-grid')
if (mGridTemplateColumns != aNewData.mGridTemplateColumns ||
mGridTemplateRows != aNewData.mGridTemplateRows ||
mGridTemplateAreas != aNewData.mGridTemplateAreas ||
mGridAutoColumnsMin != aNewData.mGridAutoColumnsMin ||
mGridAutoColumnsMax != aNewData.mGridAutoColumnsMax ||
mGridAutoRowsMin != aNewData.mGridAutoRowsMin ||
mGridAutoRowsMax != aNewData.mGridAutoRowsMax ||
mGridAutoFlow != aNewData.mGridAutoFlow) {
return hint |
nsChangeHint_AllReflowHints;
}
// Properties that apply to grid items:
// FIXME: only for grid items
// (ie. parent frame is 'display: grid' or 'display: inline-grid')
if (mGridColumnStart != aNewData.mGridColumnStart ||
mGridColumnEnd != aNewData.mGridColumnEnd ||
mGridRowStart != aNewData.mGridRowStart ||
mGridRowEnd != aNewData.mGridRowEnd ||
mGridColumnGap != aNewData.mGridColumnGap ||
mGridRowGap != aNewData.mGridRowGap) {
return hint |
nsChangeHint_AllReflowHints;
}
// Changing 'justify-content/items/self' might affect the positioning,
// but it won't affect any sizing.
if (mJustifyContent != aNewData.mJustifyContent ||
mJustifyItems != aNewData.mJustifyItems ||
mJustifySelf != aNewData.mJustifySelf) {
hint |= nsChangeHint_NeedReflow;
}
// 'align-content' doesn't apply to a single-line flexbox but we don't know
// if we're a flex container at this point so we can't optimize for that.
if (mAlignContent != aNewData.mAlignContent) {
hint |= nsChangeHint_NeedReflow;
}
bool widthChanged = mWidth != aNewData.mWidth ||
mMinWidth != aNewData.mMinWidth ||
mMaxWidth != aNewData.mMaxWidth;
bool heightChanged = mHeight != aNewData.mHeight ||
mMinHeight != aNewData.mMinHeight ||
mMaxHeight != aNewData.mMaxHeight;
// If aOldStyleVisibility is null, we don't need to bother with any of
// these tests, since we know that the element never had its
// nsStyleVisibility accessed, which means it couldn't have done
// layout.
// Note that we pass an nsStyleVisibility here because we don't want
// to cause a new struct to be computed during
// nsStyleContext::CalcStyleDifference, which can lead to incorrect
// style data.
// It doesn't matter whether we're looking at the old or new
// visibility struct, since a change between vertical and horizontal
// writing-mode will cause a reframe, and it's easier to pass the old.
if (aOldStyleVisibility) {
bool isVertical = WritingMode(aOldStyleVisibility).IsVertical();
if (isVertical ? widthChanged : heightChanged) {
// Block-size changes can affect descendant intrinsic sizes due to
// replaced elements with percentage bsizes in descendants which
// also have percentage bsizes. This is handled via
// nsChangeHint_UpdateComputedBSize which clears intrinsic sizes
// for frames that have such replaced elements.
hint |= nsChangeHint_NeedReflow |
nsChangeHint_UpdateComputedBSize |
nsChangeHint_ReflowChangesSizeOrPosition;
}
if (isVertical ? heightChanged : widthChanged) {
// None of our inline-size differences can affect descendant
// intrinsic sizes and none of them need to force children to
// reflow.
hint |= nsChangeHint_AllReflowHints &
~(nsChangeHint_ClearDescendantIntrinsics |
nsChangeHint_NeedDirtyReflow);
}
} else {
if (widthChanged || heightChanged) {
hint |= nsChangeHint_NeutralChange;
}
}
// If any of the offsets have changed, then return the respective hints
// so that we would hopefully be able to avoid reflowing.
// Note that it is possible that we'll need to reflow when processing
// restyles, but we don't have enough information to make a good decision
// right now.
// Don't try to handle changes between "auto" and non-auto efficiently;
// that's tricky to do and will hardly ever be able to avoid a reflow.
if (mOffset != aNewData.mOffset) {
if (IsAutonessEqual(mOffset, aNewData.mOffset)) {
hint |= nsChangeHint_RecomputePosition |
nsChangeHint_UpdateParentOverflow;
} else {
hint |= nsChangeHint_AllReflowHints;
}
}
return hint;
}
/* static */ bool
nsStylePosition::WidthCoordDependsOnContainer(const nsStyleCoord &aCoord)
{
return aCoord.HasPercent() ||
(aCoord.GetUnit() == eStyleUnit_Enumerated &&
(aCoord.GetIntValue() == NS_STYLE_WIDTH_FIT_CONTENT ||
aCoord.GetIntValue() == NS_STYLE_WIDTH_AVAILABLE));
}
uint8_t
nsStylePosition::UsedAlignSelf(nsStyleContext* aParent) const
{
if (mAlignSelf != NS_STYLE_ALIGN_AUTO) {
return mAlignSelf;
}
if (MOZ_LIKELY(aParent)) {
auto parentAlignItems = aParent->StylePosition()->mAlignItems;
MOZ_ASSERT(!(parentAlignItems & NS_STYLE_ALIGN_LEGACY),
"align-items can't have 'legacy'");
return parentAlignItems;
}
return NS_STYLE_ALIGN_NORMAL;
}
uint8_t
nsStylePosition::ComputedJustifyItems(nsStyleContext* aParent) const
{
if (mJustifyItems != NS_STYLE_JUSTIFY_AUTO) {
return mJustifyItems;
}
if (MOZ_LIKELY(aParent)) {
auto inheritedJustifyItems =
aParent->StylePosition()->ComputedJustifyItems(aParent->GetParent());
// "If the inherited value of justify-items includes the 'legacy' keyword,
// 'auto' computes to the inherited value." Otherwise, 'normal'.
if (inheritedJustifyItems & NS_STYLE_JUSTIFY_LEGACY) {
return inheritedJustifyItems;
}
}
return NS_STYLE_JUSTIFY_NORMAL;
}
uint8_t
nsStylePosition::UsedJustifySelf(nsStyleContext* aParent) const
{
if (mJustifySelf != NS_STYLE_JUSTIFY_AUTO) {
return mJustifySelf;
}
if (MOZ_LIKELY(aParent)) {
auto inheritedJustifyItems = aParent->StylePosition()->
ComputedJustifyItems(aParent->GetParent());
return inheritedJustifyItems & ~NS_STYLE_JUSTIFY_LEGACY;
}
return NS_STYLE_JUSTIFY_NORMAL;
}
// --------------------
// nsStyleTable
//
nsStyleTable::nsStyleTable(StyleStructContext aContext)
: mLayoutStrategy(NS_STYLE_TABLE_LAYOUT_AUTO)
, mSpan(1)
{
MOZ_COUNT_CTOR(nsStyleTable);
}
nsStyleTable::~nsStyleTable()
{
MOZ_COUNT_DTOR(nsStyleTable);
}
nsStyleTable::nsStyleTable(const nsStyleTable& aSource)
: mLayoutStrategy(aSource.mLayoutStrategy)
, mSpan(aSource.mSpan)
{
MOZ_COUNT_CTOR(nsStyleTable);
}
nsChangeHint
nsStyleTable::CalcDifference(const nsStyleTable& aNewData) const
{
if (mSpan != aNewData.mSpan ||
mLayoutStrategy != aNewData.mLayoutStrategy) {
return nsChangeHint_ReconstructFrame;
}
return nsChangeHint(0);
}
// -----------------------
// nsStyleTableBorder
nsStyleTableBorder::nsStyleTableBorder(StyleStructContext aContext)
: mBorderSpacingCol(0)
, mBorderSpacingRow(0)
, mBorderCollapse(NS_STYLE_BORDER_SEPARATE)
, mCaptionSide(NS_STYLE_CAPTION_SIDE_TOP)
, mEmptyCells(NS_STYLE_TABLE_EMPTY_CELLS_SHOW)
{
MOZ_COUNT_CTOR(nsStyleTableBorder);
}
nsStyleTableBorder::~nsStyleTableBorder()
{
MOZ_COUNT_DTOR(nsStyleTableBorder);
}
nsStyleTableBorder::nsStyleTableBorder(const nsStyleTableBorder& aSource)
: mBorderSpacingCol(aSource.mBorderSpacingCol)
, mBorderSpacingRow(aSource.mBorderSpacingRow)
, mBorderCollapse(aSource.mBorderCollapse)
, mCaptionSide(aSource.mCaptionSide)
, mEmptyCells(aSource.mEmptyCells)
{
MOZ_COUNT_CTOR(nsStyleTableBorder);
}
nsChangeHint
nsStyleTableBorder::CalcDifference(const nsStyleTableBorder& aNewData) 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 != aNewData.mBorderCollapse) {
return nsChangeHint_ReconstructFrame;
}
if ((mCaptionSide == aNewData.mCaptionSide) &&
(mBorderSpacingCol == aNewData.mBorderSpacingCol) &&
(mBorderSpacingRow == aNewData.mBorderSpacingRow)) {
if (mEmptyCells == aNewData.mEmptyCells) {
return nsChangeHint(0);
}
return NS_STYLE_HINT_VISUAL;
} else {
return NS_STYLE_HINT_REFLOW;
}
}
// --------------------
// nsStyleColor
//
nsStyleColor::nsStyleColor(StyleStructContext aContext)
: mColor(aContext.DefaultColor())
{
MOZ_COUNT_CTOR(nsStyleColor);
}
nsStyleColor::nsStyleColor(const nsStyleColor& aSource)
: mColor(aSource.mColor)
{
MOZ_COUNT_CTOR(nsStyleColor);
}
nsChangeHint
nsStyleColor::CalcDifference(const nsStyleColor& aNewData) const
{
if (mColor == aNewData.mColor) {
return nsChangeHint(0);
}
return nsChangeHint_RepaintFrame;
}
// --------------------
// nsStyleGradient
//
bool
nsStyleGradient::operator==(const nsStyleGradient& aOther) const
{
MOZ_ASSERT(mSize == NS_STYLE_GRADIENT_SIZE_FARTHEST_CORNER ||
mShape != NS_STYLE_GRADIENT_SHAPE_LINEAR,
"incorrect combination of shape and size");
MOZ_ASSERT(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 ||
mLegacySyntax != aOther.mLegacySyntax ||
mBgPosX != aOther.mBgPosX ||
mBgPosY != aOther.mBgPosY ||
mAngle != aOther.mAngle ||
mRadiusX != aOther.mRadiusX ||
mRadiusY != aOther.mRadiusY) {
return false;
}
if (mStops.Length() != aOther.mStops.Length()) {
return false;
}
for (uint32_t i = 0; i < mStops.Length(); i++) {
const auto& stop1 = mStops[i];
const auto& stop2 = aOther.mStops[i];
if (stop1.mLocation != stop2.mLocation ||
stop1.mIsInterpolationHint != stop2.mIsInterpolationHint ||
(!stop1.mIsInterpolationHint && stop1.mColor != stop2.mColor)) {
return false;
}
}
return true;
}
nsStyleGradient::nsStyleGradient()
: mShape(NS_STYLE_GRADIENT_SHAPE_LINEAR)
, mSize(NS_STYLE_GRADIENT_SIZE_FARTHEST_CORNER)
, mRepeating(false)
, mLegacySyntax(false)
{
}
bool
nsStyleGradient::IsOpaque()
{
for (uint32_t i = 0; i < mStops.Length(); i++) {
if (NS_GET_A(mStops[i].mColor) < 255) {
return false;
}
}
return true;
}
bool
nsStyleGradient::HasCalc()
{
for (uint32_t i = 0; i < mStops.Length(); i++) {
if (mStops[i].mLocation.IsCalcUnit()) {
return true;
}
}
return mBgPosX.IsCalcUnit() || mBgPosY.IsCalcUnit() || mAngle.IsCalcUnit() ||
mRadiusX.IsCalcUnit() || mRadiusY.IsCalcUnit();
}
// --------------------
// nsStyleImageRequest
/**
* Runnable to release the nsStyleImageRequest's mRequestProxy,
* mImageValue and mImageValue on the main thread, and to perform
* any necessary unlocking and untracking of the image.
*/
class StyleImageRequestCleanupTask : public mozilla::Runnable
{
public:
typedef nsStyleImageRequest::Mode Mode;
StyleImageRequestCleanupTask(Mode aModeFlags,
already_AddRefed<imgRequestProxy> aRequestProxy,
already_AddRefed<css::ImageValue> aImageValue,
already_AddRefed<ImageTracker> aImageTracker)
: mModeFlags(aModeFlags)
, mRequestProxy(aRequestProxy)
, mImageValue(aImageValue)
, mImageTracker(aImageTracker)
{
}
NS_IMETHOD Run() final
{
MOZ_ASSERT(NS_IsMainThread());
if (!mRequestProxy) {
return NS_OK;
}
if (mModeFlags & Mode::Track) {
MOZ_ASSERT(mImageTracker);
mImageTracker->Remove(mRequestProxy);
} else {
mRequestProxy->UnlockImage();
}
if (mModeFlags & Mode::Discard) {
mRequestProxy->RequestDiscard();
}
return NS_OK;
}
protected:
virtual ~StyleImageRequestCleanupTask() { MOZ_ASSERT(NS_IsMainThread()); }
private:
Mode mModeFlags;
// Since we always dispatch this runnable to the main thread, these will be
// released on the main thread when the runnable itself is released.
RefPtr<imgRequestProxy> mRequestProxy;
RefPtr<css::ImageValue> mImageValue;
RefPtr<ImageTracker> mImageTracker;
};
nsStyleImageRequest::nsStyleImageRequest(Mode aModeFlags,
imgRequestProxy* aRequestProxy,
css::ImageValue* aImageValue,
ImageTracker* aImageTracker)
: mRequestProxy(aRequestProxy)
, mImageValue(aImageValue)
, mImageTracker(aImageTracker)
, mModeFlags(aModeFlags)
, mResolved(true)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aRequestProxy);
MOZ_ASSERT(aImageValue);
MOZ_ASSERT(!!(aModeFlags & Mode::Track) == !!aImageTracker);
MaybeTrackAndLock();
}
nsStyleImageRequest::nsStyleImageRequest(
Mode aModeFlags,
nsStringBuffer* aURLBuffer,
already_AddRefed<PtrHolder<nsIURI>> aBaseURI,
already_AddRefed<PtrHolder<nsIURI>> aReferrer,
already_AddRefed<PtrHolder<nsIPrincipal>> aPrincipal)
: mModeFlags(aModeFlags)
, mResolved(false)
{
mImageValue = new css::ImageValue(aURLBuffer, Move(aBaseURI),
Move(aReferrer), Move(aPrincipal));
}
nsStyleImageRequest::~nsStyleImageRequest()
{
// We may or may not be being destroyed on the main thread. To clean
// up, we must untrack and unlock the image (depending on mModeFlags),
// and release mRequestProxy and mImageValue, all on the main thread.
{
RefPtr<StyleImageRequestCleanupTask> task =
new StyleImageRequestCleanupTask(mModeFlags,
mRequestProxy.forget(),
mImageValue.forget(),
mImageTracker.forget());
if (NS_IsMainThread()) {
task->Run();
} else {
NS_DispatchToMainThread(task.forget());
}
}
MOZ_ASSERT(!mRequestProxy);
MOZ_ASSERT(!mImageValue);
MOZ_ASSERT(!mImageTracker);
}
bool
nsStyleImageRequest::Resolve(nsPresContext* aPresContext)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!IsResolved(), "already resolved");
mResolved = true;
// For now, just have unique nsCSSValue/ImageValue objects. We should
// really store the ImageValue on the Servo specified value, so that we can
// share imgRequestProxys that come from the same rule in the same
// document.
mImageValue->Initialize(aPresContext->Document());
nsCSSValue value;
value.SetImageValue(mImageValue);
mRequestProxy = value.GetPossiblyStaticImageValue(aPresContext->Document(),
aPresContext);
if (!mRequestProxy) {
// The URL resolution or image load failed.
return false;
}
if (mModeFlags & Mode::Track) {
mImageTracker = aPresContext->Document()->ImageTracker();
}
MaybeTrackAndLock();
return true;
}
void
nsStyleImageRequest::MaybeTrackAndLock()
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(IsResolved());
MOZ_ASSERT(mRequestProxy);
if (mModeFlags & Mode::Track) {
MOZ_ASSERT(mImageTracker);
mImageTracker->Add(mRequestProxy);
} else {
MOZ_ASSERT(!mImageTracker);
mRequestProxy->LockImage();
}
}
bool
nsStyleImageRequest::DefinitelyEquals(const nsStyleImageRequest& aOther) const
{
return DefinitelyEqualURIs(mImageValue, aOther.mImageValue);
}
// --------------------
// CachedBorderImageData
//
void
CachedBorderImageData::SetCachedSVGViewportSize(
const mozilla::Maybe<nsSize>& aSVGViewportSize)
{
mCachedSVGViewportSize = aSVGViewportSize;
}
const mozilla::Maybe<nsSize>&
CachedBorderImageData::GetCachedSVGViewportSize()
{
return mCachedSVGViewportSize;
}
void
CachedBorderImageData::PurgeCachedImages()
{
mSubImages.Clear();
}
void
CachedBorderImageData::SetSubImage(uint8_t aIndex, imgIContainer* aSubImage)
{
mSubImages.ReplaceObjectAt(aSubImage, aIndex);
}
imgIContainer*
CachedBorderImageData::GetSubImage(uint8_t aIndex)
{
imgIContainer* subImage = nullptr;
if (aIndex < mSubImages.Count())
subImage = mSubImages[aIndex];
return subImage;
}
// --------------------
// nsStyleImage
//
nsStyleImage::nsStyleImage()
: mType(eStyleImageType_Null)
, mCropRect(nullptr)
{
MOZ_COUNT_CTOR(nsStyleImage);
}
nsStyleImage::~nsStyleImage()
{
MOZ_COUNT_DTOR(nsStyleImage);
if (mType != eStyleImageType_Null) {
SetNull();
}
}
nsStyleImage::nsStyleImage(const nsStyleImage& aOther)
: mType(eStyleImageType_Null)
, mCropRect(nullptr)
{
// 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) {
SetImageRequest(do_AddRef(aOther.mImage));
} else if (aOther.mType == eStyleImageType_Gradient) {
SetGradientData(aOther.mGradient);
} else if (aOther.mType == eStyleImageType_Element) {
SetElementId(aOther.mElementId);
}
UniquePtr<nsStyleSides> cropRectCopy;
if (aOther.mCropRect) {
cropRectCopy = MakeUnique<nsStyleSides>(*aOther.mCropRect.get());
}
SetCropRect(Move(cropRectCopy));
}
void
nsStyleImage::SetNull()
{
if (mType == eStyleImageType_Gradient) {
mGradient->Release();
} else if (mType == eStyleImageType_Image) {
NS_RELEASE(mImage);
} else if (mType == eStyleImageType_Element) {
free(mElementId);
}
mType = eStyleImageType_Null;
mCropRect = nullptr;
}
void
nsStyleImage::SetImageRequest(already_AddRefed<nsStyleImageRequest> aImage)
{
RefPtr<nsStyleImageRequest> image = aImage;
if (mType != eStyleImageType_Null) {
SetNull();
}
if (image) {
mImage = image.forget().take();
mType = eStyleImageType_Image;
}
if (mCachedBIData) {
mCachedBIData->PurgeCachedImages();
}
}
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 char16_t* aElementId)
{
if (mType != eStyleImageType_Null) {
SetNull();
}
if (aElementId) {
mElementId = NS_strdup(aElementId);
mType = eStyleImageType_Element;
}
}
void
nsStyleImage::SetCropRect(UniquePtr<nsStyleSides> aCropRect)
{
mCropRect = Move(aCropRect);
}
static int32_t
ConvertToPixelCoord(const nsStyleCoord& aCoord, int32_t 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;
}
MOZ_ASSERT(pixelValue >= 0, "we ensured non-negative while parsing");
pixelValue = std::min(pixelValue, double(INT32_MAX)); // avoid overflow
return NS_lround(pixelValue);
}
bool
nsStyleImage::ComputeActualCropRect(nsIntRect& aActualCropRect,
bool* aIsEntireImage) const
{
if (mType != eStyleImageType_Image) {
return false;
}
imgRequestProxy* req = GetImageData();
if (!req) {
return false;
}
nsCOMPtr<imgIContainer> imageContainer;
req->GetImage(getter_AddRefs(imageContainer));
if (!imageContainer) {
return false;
}
nsIntSize imageSize;
imageContainer->GetWidth(&imageSize.width);
imageContainer->GetHeight(&imageSize.height);
if (imageSize.width <= 0 || imageSize.height <= 0) {
return false;
}
int32_t left = ConvertToPixelCoord(mCropRect->GetLeft(), imageSize.width);
int32_t top = ConvertToPixelCoord(mCropRect->GetTop(), imageSize.height);
int32_t right = ConvertToPixelCoord(mCropRect->GetRight(), imageSize.width);
int32_t 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.IsEqualInterior(imageRect);
}
return true;
}
nsresult
nsStyleImage::StartDecoding() const
{
if (mType == eStyleImageType_Image) {
imgRequestProxy* req = GetImageData();
if (!req) {
return NS_ERROR_FAILURE;
}
return req->StartDecoding();
}
return NS_OK;
}
bool
nsStyleImage::IsOpaque() const
{
if (!IsComplete()) {
return false;
}
if (mType == eStyleImageType_Gradient) {
return mGradient->IsOpaque();
}
if (mType == eStyleImageType_Element) {
return false;
}
MOZ_ASSERT(mType == eStyleImageType_Image, "unexpected image type");
MOZ_ASSERT(GetImageData(), "should've returned earlier above");
nsCOMPtr<imgIContainer> imageContainer;
GetImageData()->GetImage(getter_AddRefs(imageContainer));
MOZ_ASSERT(imageContainer, "IsComplete() said image container is ready");
// Check if the crop region of the image is opaque.
if (imageContainer->WillDrawOpaqueNow()) {
if (!mCropRect) {
return true;
}
// Must make sure if mCropRect contains at least a pixel.
// XXX Is this optimization worth it? Maybe I should just return false.
nsIntRect actualCropRect;
bool rv = ComputeActualCropRect(actualCropRect);
NS_ASSERTION(rv, "ComputeActualCropRect() can not fail here");
return rv && !actualCropRect.IsEmpty();
}
return false;
}
bool
nsStyleImage::IsComplete() const
{
switch (mType) {
case eStyleImageType_Null:
return false;
case eStyleImageType_Gradient:
case eStyleImageType_Element:
return true;
case eStyleImageType_Image: {
imgRequestProxy* req = GetImageData();
if (!req) {
return false;
}
uint32_t status = imgIRequest::STATUS_ERROR;
return NS_SUCCEEDED(req->GetImageStatus(&status)) &&
(status & imgIRequest::STATUS_SIZE_AVAILABLE) &&
(status & imgIRequest::STATUS_FRAME_COMPLETE);
}
default:
NS_NOTREACHED("unexpected image type");
return false;
}
}
bool
nsStyleImage::IsLoaded() const
{
switch (mType) {
case eStyleImageType_Null:
return false;
case eStyleImageType_Gradient:
case eStyleImageType_Element:
return true;
case eStyleImageType_Image: {
imgRequestProxy* req = GetImageData();
if (!req) {
return false;
}
uint32_t status = imgIRequest::STATUS_ERROR;
return NS_SUCCEEDED(req->GetImageStatus(&status)) &&
!(status & imgIRequest::STATUS_ERROR) &&
(status & imgIRequest::STATUS_LOAD_COMPLETE);
}
default:
NS_NOTREACHED("unexpected image type");
return false;
}
}
static inline bool
EqualRects(const UniquePtr<nsStyleSides>& aRect1, const UniquePtr<nsStyleSides>& aRect2)
{
return aRect1 == aRect2 || /* handles null== null, and optimize */
(aRect1 && aRect2 && *aRect1 == *aRect2);
}
bool
nsStyleImage::operator==(const nsStyleImage& aOther) const
{
if (mType != aOther.mType) {
return false;
}
if (!EqualRects(mCropRect, aOther.mCropRect)) {
return false;
}
if (mType == eStyleImageType_Image) {
return DefinitelyEqualImages(mImage, aOther.mImage);
}
if (mType == eStyleImageType_Gradient) {
return *mGradient == *aOther.mGradient;
}
if (mType == eStyleImageType_Element) {
return NS_strcmp(mElementId, aOther.mElementId) == 0;
}
return true;
}
void
nsStyleImage::PurgeCacheForViewportChange(
const mozilla::Maybe<nsSize>& aSVGViewportSize,
const bool aHasIntrinsicRatio) const
{
EnsureCachedBIData();
// If we're redrawing with a different viewport-size than we used for our
// cached subimages, then we can't trust that our subimages are valid;
// any percent sizes/positions in our SVG doc may be different now. Purge!
// (We don't have to purge if the SVG document has an intrinsic ratio,
// though, because the actual size of elements in SVG documant's coordinate
// axis are fixed in this case.)
if (aSVGViewportSize != mCachedBIData->GetCachedSVGViewportSize() &&
!aHasIntrinsicRatio) {
mCachedBIData->PurgeCachedImages();
mCachedBIData->SetCachedSVGViewportSize(aSVGViewportSize);
}
}
// --------------------
// nsStyleImageLayers
//
const nsCSSPropertyID nsStyleImageLayers::kBackgroundLayerTable[] = {
eCSSProperty_background, // shorthand
eCSSProperty_background_color, // color
eCSSProperty_background_image, // image
eCSSProperty_background_repeat, // repeat
eCSSProperty_background_position_x, // positionX
eCSSProperty_background_position_y, // positionY
eCSSProperty_background_clip, // clip
eCSSProperty_background_origin, // origin
eCSSProperty_background_size, // size
eCSSProperty_background_attachment, // attachment
eCSSProperty_UNKNOWN, // maskMode
eCSSProperty_UNKNOWN // composite
};
#ifdef MOZ_ENABLE_MASK_AS_SHORTHAND
const nsCSSPropertyID nsStyleImageLayers::kMaskLayerTable[] = {
eCSSProperty_mask, // shorthand
eCSSProperty_UNKNOWN, // color
eCSSProperty_mask_image, // image
eCSSProperty_mask_repeat, // repeat
eCSSProperty_mask_position_x, // positionX
eCSSProperty_mask_position_y, // positionY
eCSSProperty_mask_clip, // clip
eCSSProperty_mask_origin, // origin
eCSSProperty_mask_size, // size
eCSSProperty_UNKNOWN, // attachment
eCSSProperty_mask_mode, // maskMode
eCSSProperty_mask_composite // composite
};
#endif
nsStyleImageLayers::nsStyleImageLayers(nsStyleImageLayers::LayerType aType)
: mAttachmentCount(1)
, mClipCount(1)
, mOriginCount(1)
, mRepeatCount(1)
, mPositionXCount(1)
, mPositionYCount(1)
, mImageCount(1)
, mSizeCount(1)
, mMaskModeCount(1)
, mBlendModeCount(1)
, mCompositeCount(1)
, mLayers(nsStyleAutoArray<Layer>::WITH_SINGLE_INITIAL_ELEMENT)
{
MOZ_COUNT_CTOR(nsStyleImageLayers);
// Ensure first layer is initialized as specified layer type
mLayers[0].Initialize(aType);
}
nsStyleImageLayers::nsStyleImageLayers(const nsStyleImageLayers &aSource)
: mAttachmentCount(aSource.mAttachmentCount)
, mClipCount(aSource.mClipCount)
, mOriginCount(aSource.mOriginCount)
, mRepeatCount(aSource.mRepeatCount)
, mPositionXCount(aSource.mPositionXCount)
, mPositionYCount(aSource.mPositionYCount)
, mImageCount(aSource.mImageCount)
, mSizeCount(aSource.mSizeCount)
, mMaskModeCount(aSource.mMaskModeCount)
, mBlendModeCount(aSource.mBlendModeCount)
, mCompositeCount(aSource.mCompositeCount)
, mLayers(aSource.mLayers) // deep copy
{
MOZ_COUNT_CTOR(nsStyleImageLayers);
// If the deep copy of mLayers failed, truncate the counts.
uint32_t count = mLayers.Length();
if (count != aSource.mLayers.Length()) {
NS_WARNING("truncating counts due to out-of-memory");
mAttachmentCount = std::max(mAttachmentCount, count);
mClipCount = std::max(mClipCount, count);
mOriginCount = std::max(mOriginCount, count);
mRepeatCount = std::max(mRepeatCount, count);
mPositionXCount = std::max(mPositionXCount, count);
mPositionYCount = std::max(mPositionYCount, count);
mImageCount = std::max(mImageCount, count);
mSizeCount = std::max(mSizeCount, count);
mMaskModeCount = std::max(mMaskModeCount, count);
mBlendModeCount = std::max(mBlendModeCount, count);
mCompositeCount = std::max(mCompositeCount, count);
}
}
nsChangeHint
nsStyleImageLayers::CalcDifference(const nsStyleImageLayers& aNewLayers,
nsStyleImageLayers::LayerType aType) const
{
nsChangeHint hint = nsChangeHint(0);
const nsStyleImageLayers& moreLayers =
mImageCount > aNewLayers.mImageCount ?
*this : aNewLayers;
const nsStyleImageLayers& lessLayers =
mImageCount > aNewLayers.mImageCount ?
aNewLayers : *this;
NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT(i, moreLayers) {
if (i < lessLayers.mImageCount) {
nsChangeHint layerDifference =
moreLayers.mLayers[i].CalcDifference(lessLayers.mLayers[i]);
hint |= layerDifference;
if (layerDifference &&
((moreLayers.mLayers[i].mImage.GetType() == eStyleImageType_Element) ||
(lessLayers.mLayers[i].mImage.GetType() == eStyleImageType_Element))) {
hint |= nsChangeHint_UpdateEffects | nsChangeHint_RepaintFrame;
}
} else {
hint |= nsChangeHint_RepaintFrame;
if (moreLayers.mLayers[i].mImage.GetType() == eStyleImageType_Element) {
hint |= nsChangeHint_UpdateEffects | nsChangeHint_RepaintFrame;
}
}
}
if (aType == nsStyleImageLayers::LayerType::Mask &&
mImageCount != aNewLayers.mImageCount) {
hint |= nsChangeHint_UpdateEffects;
}
if (hint) {
return hint;
}
if (mAttachmentCount != aNewLayers.mAttachmentCount ||
mBlendModeCount != aNewLayers.mBlendModeCount ||
mClipCount != aNewLayers.mClipCount ||
mCompositeCount != aNewLayers.mCompositeCount ||
mMaskModeCount != aNewLayers.mMaskModeCount ||
mOriginCount != aNewLayers.mOriginCount ||
mRepeatCount != aNewLayers.mRepeatCount ||
mPositionXCount != aNewLayers.mPositionXCount ||
mPositionYCount != aNewLayers.mPositionYCount ||
mSizeCount != aNewLayers.mSizeCount) {
hint |= nsChangeHint_NeutralChange;
}
return hint;
}
bool
nsStyleImageLayers::HasLayerWithImage() const
{
for (uint32_t i = 0; i < mImageCount; i++) {
// mLayers[i].mSourceURI can be nullptr if mask-image prop value is
// <element-reference> or <gradient>
// mLayers[i].mImage can be empty if mask-image prop value is a reference
// to SVG mask element.
// So we need to test both mSourceURI and mImage.
if ((mLayers[i].mSourceURI && mLayers[i].mSourceURI->GetURI()) ||
!mLayers[i].mImage.IsEmpty()) {
return true;
}
}
return false;
}
bool
nsStyleImageLayers::IsInitialPositionForLayerType(Position aPosition, LayerType aType)
{
if (aPosition.mXPosition.mPercent == 0.0f &&
aPosition.mXPosition.mLength == 0 &&
aPosition.mXPosition.mHasPercent &&
aPosition.mYPosition.mPercent == 0.0f &&
aPosition.mYPosition.mLength == 0 &&
aPosition.mYPosition.mHasPercent) {
return true;
}
return false;
}
void
Position::SetInitialPercentValues(float aPercentVal)
{
mXPosition.mPercent = aPercentVal;
mXPosition.mLength = 0;
mXPosition.mHasPercent = true;
mYPosition.mPercent = aPercentVal;
mYPosition.mLength = 0;
mYPosition.mHasPercent = true;
}
void
Position::SetInitialZeroValues()
{
mXPosition.mPercent = 0;
mXPosition.mLength = 0;
mXPosition.mHasPercent = false;
mYPosition.mPercent = 0;
mYPosition.mLength = 0;
mYPosition.mHasPercent = false;
}
bool
nsStyleImageLayers::Size::DependsOnPositioningAreaSize(const nsStyleImage& aImage) const
{
MOZ_ASSERT(aImage.GetType() != eStyleImageType_Null,
"caller should have handled this");
// If either dimension contains a non-zero percentage, rendering for that
// dimension straightforwardly depends on frame size.
if ((mWidthType == eLengthPercentage && mWidth.mPercent != 0.0f) ||
(mHeightType == eLengthPercentage && mHeight.mPercent != 0.0f)) {
return true;
}
// So too for contain and cover.
if (mWidthType == eContain || mWidthType == eCover) {
return true;
}
// If both dimensions are fixed lengths, there's no dependency.
if (mWidthType == eLengthPercentage && mHeightType == eLengthPercentage) {
return false;
}
MOZ_ASSERT((mWidthType == eLengthPercentage && mHeightType == eAuto) ||
(mWidthType == eAuto && mHeightType == eLengthPercentage) ||
(mWidthType == eAuto && mHeightType == eAuto),
"logic error");
nsStyleImageType type = aImage.GetType();
// Gradient rendering depends on frame size when auto is involved because
// gradients have no intrinsic ratio or dimensions, and therefore the relevant
// dimension is "treat[ed] as 100%".
if (type == eStyleImageType_Gradient) {
return true;
}
// XXX Element rendering for auto or fixed length doesn't depend on frame size
// according to the spec. However, we don't implement the spec yet, so
// for now we bail and say element() plus auto affects ultimate size.
if (type == eStyleImageType_Element) {
return true;
}
if (type == eStyleImageType_Image) {
nsCOMPtr<imgIContainer> imgContainer;
if (imgRequestProxy* req = aImage.GetImageData()) {
req->GetImage(getter_AddRefs(imgContainer));
}
if (imgContainer) {
CSSIntSize imageSize;
nsSize imageRatio;
bool hasWidth, hasHeight;
nsLayoutUtils::ComputeSizeForDrawing(imgContainer, imageSize, imageRatio,
hasWidth, hasHeight);
// If the image has a fixed width and height, rendering never depends on
// the frame size.
if (hasWidth && hasHeight) {
return false;
}
// If the image has an intrinsic ratio, rendering will depend on frame
// size when background-size is all auto.
if (imageRatio != nsSize(0, 0)) {
return mWidthType == mHeightType;
}
// Otherwise, rendering depends on frame size when the image dimensions
// and background-size don't complement each other.
return !(hasWidth && mHeightType == eLengthPercentage) &&
!(hasHeight && mWidthType == eLengthPercentage);
}
} else {
NS_NOTREACHED("missed an enum value");
}
// Passed the gauntlet: no dependency.
return false;
}
void
nsStyleImageLayers::Size::SetInitialValues()
{
mWidthType = mHeightType = eAuto;
}
bool
nsStyleImageLayers::Size::operator==(const Size& aOther) const
{
MOZ_ASSERT(mWidthType < eDimensionType_COUNT,
"bad mWidthType for this");
MOZ_ASSERT(mHeightType < eDimensionType_COUNT,
"bad mHeightType for this");
MOZ_ASSERT(aOther.mWidthType < eDimensionType_COUNT,
"bad mWidthType for aOther");
MOZ_ASSERT(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);
}
nsStyleImageLayers::Layer::Layer()
: mClip(NS_STYLE_IMAGELAYER_CLIP_BORDER)
, mAttachment(NS_STYLE_IMAGELAYER_ATTACHMENT_SCROLL)
, mBlendMode(NS_STYLE_BLEND_NORMAL)
, mComposite(NS_STYLE_MASK_COMPOSITE_ADD)
, mMaskMode(NS_STYLE_MASK_MODE_MATCH_SOURCE)
{
mImage.SetNull();
mSize.SetInitialValues();
}
nsStyleImageLayers::Layer::~Layer()
{
}
void
nsStyleImageLayers::Layer::Initialize(nsStyleImageLayers::LayerType aType)
{
mRepeat.SetInitialValues();
mPosition.SetInitialPercentValues(0.0f);
if (aType == LayerType::Background) {
mOrigin = NS_STYLE_IMAGELAYER_ORIGIN_PADDING;
} else {
MOZ_ASSERT(aType == LayerType::Mask, "unsupported layer type.");
mOrigin = NS_STYLE_IMAGELAYER_ORIGIN_BORDER;
}
}
bool
nsStyleImageLayers::Layer::RenderingMightDependOnPositioningAreaSizeChange() const
{
// Do we even have an image?
if (mImage.IsEmpty()) {
return false;
}
return mPosition.DependsOnPositioningAreaSize() ||
mSize.DependsOnPositioningAreaSize(mImage) ||
mRepeat.DependsOnPositioningAreaSize();
}
bool
nsStyleImageLayers::Layer::operator==(const Layer& aOther) const
{
return mAttachment == aOther.mAttachment &&
mClip == aOther.mClip &&
mOrigin == aOther.mOrigin &&
mRepeat == aOther.mRepeat &&
mBlendMode == aOther.mBlendMode &&
mPosition == aOther.mPosition &&
mSize == aOther.mSize &&
mImage == aOther.mImage &&
mMaskMode == aOther.mMaskMode &&
mComposite == aOther.mComposite &&
DefinitelyEqualURIs(mSourceURI, aOther.mSourceURI);
}
nsChangeHint
nsStyleImageLayers::Layer::CalcDifference(const nsStyleImageLayers::Layer& aNewLayer) const
{
nsChangeHint hint = nsChangeHint(0);
if (!DefinitelyEqualURIs(mSourceURI, aNewLayer.mSourceURI)) {
hint |= nsChangeHint_RepaintFrame | nsChangeHint_UpdateEffects;
// If Layer::mSourceURI links to a SVG mask, it has a fragment. Not vice
// versa. Here are examples of URI contains a fragment, two of them link
// to a SVG mask:
// mask:url(a.svg#maskID); // The fragment of this URI is an ID of a mask
// // element in a.svg.
// mask:url(#localMaskID); // The fragment of this URI is an ID of a mask
// // element in local document.
// mask:url(b.svg#viewBoxID); // The fragment of this URI is an ID of a
// // viewbox defined in b.svg.
// That is, if mSourceURI has a fragment, it may link to a SVG mask; If
// not, it "must" not link to a SVG mask.
bool maybeSVGMask = false;
if (mSourceURI) {
if (mSourceURI->IsLocalRef()) {
maybeSVGMask = true;
} else if (mSourceURI->GetURI()) {
mSourceURI->GetURI()->GetHasRef(&maybeSVGMask);
}
}
if (!maybeSVGMask) {
if (aNewLayer.mSourceURI) {
if (aNewLayer.mSourceURI->IsLocalRef()) {
maybeSVGMask = true;
} else if (aNewLayer.mSourceURI->GetURI()) {
aNewLayer.mSourceURI->GetURI()->GetHasRef(&maybeSVGMask);
}
}
}
// Return nsChangeHint_UpdateOverflow if either URI might link to an SVG
// mask.
if (maybeSVGMask) {
// Mask changes require that we update the PreEffectsBBoxProperty,
// which is done during overflow computation.
hint |= nsChangeHint_UpdateOverflow;
}
} else if (mAttachment != aNewLayer.mAttachment ||
mClip != aNewLayer.mClip ||
mOrigin != aNewLayer.mOrigin ||
mRepeat != aNewLayer.mRepeat ||
mBlendMode != aNewLayer.mBlendMode ||
mSize != aNewLayer.mSize ||
mImage != aNewLayer.mImage ||
mMaskMode != aNewLayer.mMaskMode ||
mComposite != aNewLayer.mComposite) {
hint |= nsChangeHint_RepaintFrame;
}
if (mPosition != aNewLayer.mPosition) {
hint |= nsChangeHint_UpdateBackgroundPosition;
}
return hint;
}
// --------------------
// nsStyleBackground
//
nsStyleBackground::nsStyleBackground(StyleStructContext aContext)
: mImage(nsStyleImageLayers::LayerType::Background)
, mBackgroundColor(NS_RGBA(0, 0, 0, 0))
{
MOZ_COUNT_CTOR(nsStyleBackground);
}
nsStyleBackground::nsStyleBackground(const nsStyleBackground& aSource)
: mImage(aSource.mImage)
, mBackgroundColor(aSource.mBackgroundColor)
{
MOZ_COUNT_CTOR(nsStyleBackground);
}
nsStyleBackground::~nsStyleBackground()
{
MOZ_COUNT_DTOR(nsStyleBackground);
}
void
nsStyleBackground::Destroy(nsPresContext* aContext)
{
this->~nsStyleBackground();
aContext->PresShell()->
FreeByObjectID(eArenaObjectID_nsStyleBackground, this);
}
void
nsStyleBackground::FinishStyle(nsPresContext* aPresContext)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aPresContext->StyleSet()->IsServo());
mImage.ResolveImages(aPresContext);
}
nsChangeHint
nsStyleBackground::CalcDifference(const nsStyleBackground& aNewData) const
{
nsChangeHint hint = nsChangeHint(0);
if (mBackgroundColor != aNewData.mBackgroundColor) {
hint |= nsChangeHint_RepaintFrame;
}
hint |= mImage.CalcDifference(aNewData.mImage,
nsStyleImageLayers::LayerType::Background);
return hint;
}
bool
nsStyleBackground::HasFixedBackground(nsIFrame* aFrame) const
{
NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT(i, mImage) {
const nsStyleImageLayers::Layer &layer = mImage.mLayers[i];
if (layer.mAttachment == NS_STYLE_IMAGELAYER_ATTACHMENT_FIXED &&
!layer.mImage.IsEmpty() &&
!nsLayoutUtils::IsTransformed(aFrame)) {
return true;
}
}
return false;
}
bool
nsStyleBackground::IsTransparent() const
{
return BottomLayer().mImage.IsEmpty() &&
mImage.mImageCount == 1 &&
NS_GET_A(mBackgroundColor) == 0;
}
void
nsTimingFunction::AssignFromKeyword(int32_t aTimingFunctionType)
{
switch (aTimingFunctionType) {
case NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_START:
mType = Type::StepStart;
mSteps = 1;
return;
default:
MOZ_FALLTHROUGH_ASSERT("aTimingFunctionType must be a keyword value");
case NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_END:
mType = Type::StepEnd;
mSteps = 1;
return;
case NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE:
case NS_STYLE_TRANSITION_TIMING_FUNCTION_LINEAR:
case NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE_IN:
case NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE_OUT:
case NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE_IN_OUT:
mType = static_cast<Type>(aTimingFunctionType);
break;
}
static_assert(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE == 0 &&
NS_STYLE_TRANSITION_TIMING_FUNCTION_LINEAR == 1 &&
NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE_IN == 2 &&
NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE_OUT == 3 &&
NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE_IN_OUT == 4,
"transition timing function constants not as expected");
static const float timingFunctionValues[5][4] = {
{ 0.25f, 0.10f, 0.25f, 1.00f }, // ease
{ 0.00f, 0.00f, 1.00f, 1.00f }, // linear
{ 0.42f, 0.00f, 1.00f, 1.00f }, // ease-in
{ 0.00f, 0.00f, 0.58f, 1.00f }, // ease-out
{ 0.42f, 0.00f, 0.58f, 1.00f } // ease-in-out
};
MOZ_ASSERT(0 <= aTimingFunctionType && aTimingFunctionType < 5,
"keyword out of range");
mFunc.mX1 = timingFunctionValues[aTimingFunctionType][0];
mFunc.mY1 = timingFunctionValues[aTimingFunctionType][1];
mFunc.mX2 = timingFunctionValues[aTimingFunctionType][2];
mFunc.mY2 = timingFunctionValues[aTimingFunctionType][3];
}
StyleTransition::StyleTransition(const StyleTransition& aCopy)
: mTimingFunction(aCopy.mTimingFunction)
, mDuration(aCopy.mDuration)
, mDelay(aCopy.mDelay)
, mProperty(aCopy.mProperty)
, mUnknownProperty(aCopy.mUnknownProperty)
{
}
void
StyleTransition::SetInitialValues()
{
mTimingFunction = nsTimingFunction(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE);
mDuration = 0.0;
mDelay = 0.0;
mProperty = eCSSPropertyExtra_all_properties;
}
void
StyleTransition::SetUnknownProperty(nsCSSPropertyID aProperty,
const nsAString& aPropertyString)
{
MOZ_ASSERT(nsCSSProps::LookupProperty(aPropertyString,
CSSEnabledState::eForAllContent) ==
aProperty,
"property and property string should match");
MOZ_ASSERT(aProperty == eCSSProperty_UNKNOWN ||
aProperty == eCSSPropertyExtra_variable,
"should be either unknown or custom property");
mProperty = aProperty;
mUnknownProperty = NS_Atomize(aPropertyString);
}
bool
StyleTransition::operator==(const StyleTransition& aOther) const
{
return mTimingFunction == aOther.mTimingFunction &&
mDuration == aOther.mDuration &&
mDelay == aOther.mDelay &&
mProperty == aOther.mProperty &&
(mProperty != eCSSProperty_UNKNOWN ||
mUnknownProperty == aOther.mUnknownProperty);
}
StyleAnimation::StyleAnimation(const StyleAnimation& aCopy)
: mTimingFunction(aCopy.mTimingFunction)
, mDuration(aCopy.mDuration)
, mDelay(aCopy.mDelay)
, mName(aCopy.mName)
, mDirection(aCopy.mDirection)
, mFillMode(aCopy.mFillMode)
, mPlayState(aCopy.mPlayState)
, mIterationCount(aCopy.mIterationCount)
{
}
void
StyleAnimation::SetInitialValues()
{
mTimingFunction = nsTimingFunction(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE);
mDuration = 0.0;
mDelay = 0.0;
mName = EmptyString();
mDirection = dom::PlaybackDirection::Normal;
mFillMode = dom::FillMode::None;
mPlayState = NS_STYLE_ANIMATION_PLAY_STATE_RUNNING;
mIterationCount = 1.0f;
}
bool
StyleAnimation::operator==(const StyleAnimation& aOther) const
{
return mTimingFunction == aOther.mTimingFunction &&
mDuration == aOther.mDuration &&
mDelay == aOther.mDelay &&
mName == aOther.mName &&
mDirection == aOther.mDirection &&
mFillMode == aOther.mFillMode &&
mPlayState == aOther.mPlayState &&
mIterationCount == aOther.mIterationCount;
}
// --------------------
// nsStyleDisplay
//
nsStyleDisplay::nsStyleDisplay(StyleStructContext aContext)
: mDisplay(StyleDisplay::Inline)
, mOriginalDisplay(StyleDisplay::Inline)
, mContain(NS_STYLE_CONTAIN_NONE)
, mAppearance(NS_THEME_NONE)
, mPosition(NS_STYLE_POSITION_STATIC)
, mFloat(StyleFloat::None)
, mOriginalFloat(StyleFloat::None)
, mBreakType(StyleClear::None)
, mBreakInside(NS_STYLE_PAGE_BREAK_AUTO)
, mBreakBefore(false)
, mBreakAfter(false)
, mOverflowX(NS_STYLE_OVERFLOW_VISIBLE)
, mOverflowY(NS_STYLE_OVERFLOW_VISIBLE)
, mOverflowClipBox(NS_STYLE_OVERFLOW_CLIP_BOX_PADDING_BOX)
, mResize(NS_STYLE_RESIZE_NONE)
, mOrient(StyleOrient::Inline)
, mIsolation(NS_STYLE_ISOLATION_AUTO)
, mTopLayer(NS_STYLE_TOP_LAYER_NONE)
, mWillChangeBitField(0)
, mTouchAction(NS_STYLE_TOUCH_ACTION_AUTO)
, mScrollBehavior(NS_STYLE_SCROLL_BEHAVIOR_AUTO)
, mScrollSnapTypeX(NS_STYLE_SCROLL_SNAP_TYPE_NONE)
, mScrollSnapTypeY(NS_STYLE_SCROLL_SNAP_TYPE_NONE)
, mScrollSnapPointsX(eStyleUnit_None)
, mScrollSnapPointsY(eStyleUnit_None)
, mBackfaceVisibility(NS_STYLE_BACKFACE_VISIBILITY_VISIBLE)
, mTransformStyle(NS_STYLE_TRANSFORM_STYLE_FLAT)
, mTransformBox(NS_STYLE_TRANSFORM_BOX_BORDER_BOX)
, mSpecifiedTransform(nullptr)
, mTransformOrigin{ {0.5f, eStyleUnit_Percent}, // Transform is centered on origin
{0.5f, eStyleUnit_Percent},
{0, nsStyleCoord::CoordConstructor} }
, mChildPerspective(eStyleUnit_None)
, mPerspectiveOrigin{ {0.5f, eStyleUnit_Percent},
{0.5f, eStyleUnit_Percent} }
, mVerticalAlign(NS_STYLE_VERTICAL_ALIGN_BASELINE, eStyleUnit_Enumerated)
, mTransitions(nsStyleAutoArray<StyleTransition>::WITH_SINGLE_INITIAL_ELEMENT)
, mTransitionTimingFunctionCount(1)
, mTransitionDurationCount(1)
, mTransitionDelayCount(1)
, mTransitionPropertyCount(1)
, mAnimations(nsStyleAutoArray<StyleAnimation>::WITH_SINGLE_INITIAL_ELEMENT)
, mAnimationTimingFunctionCount(1)
, mAnimationDurationCount(1)
, mAnimationDelayCount(1)
, mAnimationNameCount(1)
, mAnimationDirectionCount(1)
, mAnimationFillModeCount(1)
, mAnimationPlayStateCount(1)
, mAnimationIterationCountCount(1)
{
MOZ_COUNT_CTOR(nsStyleDisplay);
// Initial value for mScrollSnapDestination is "0px 0px"
mScrollSnapDestination.SetInitialZeroValues();
mTransitions[0].SetInitialValues();
mAnimations[0].SetInitialValues();
}
nsStyleDisplay::nsStyleDisplay(const nsStyleDisplay& aSource)
: mBinding(aSource.mBinding)
, mDisplay(aSource.mDisplay)
, mOriginalDisplay(aSource.mOriginalDisplay)
, mContain(aSource.mContain)
, mAppearance(aSource.mAppearance)
, mPosition(aSource.mPosition)
, mFloat(aSource.mFloat)
, mOriginalFloat(aSource.mOriginalFloat)
, mBreakType(aSource.mBreakType)
, mBreakInside(aSource.mBreakInside)
, mBreakBefore(aSource.mBreakBefore)
, mBreakAfter(aSource.mBreakAfter)
, mOverflowX(aSource.mOverflowX)
, mOverflowY(aSource.mOverflowY)
, mOverflowClipBox(aSource.mOverflowClipBox)
, mResize(aSource.mResize)
, mOrient(aSource.mOrient)
, mIsolation(aSource.mIsolation)
, mTopLayer(aSource.mTopLayer)
, mWillChangeBitField(aSource.mWillChangeBitField)
, mWillChange(aSource.mWillChange)
, mTouchAction(aSource.mTouchAction)
, mScrollBehavior(aSource.mScrollBehavior)
, mScrollSnapTypeX(aSource.mScrollSnapTypeX)
, mScrollSnapTypeY(aSource.mScrollSnapTypeY)
, mScrollSnapPointsX(aSource.mScrollSnapPointsX)
, mScrollSnapPointsY(aSource.mScrollSnapPointsY)
, mScrollSnapDestination(aSource.mScrollSnapDestination)
, mScrollSnapCoordinate(aSource.mScrollSnapCoordinate)
, mBackfaceVisibility(aSource.mBackfaceVisibility)
, mTransformStyle(aSource.mTransformStyle)
, mTransformBox(aSource.mTransformBox)
, mSpecifiedTransform(aSource.mSpecifiedTransform)
, mTransformOrigin{ aSource.mTransformOrigin[0],
aSource.mTransformOrigin[1],
aSource.mTransformOrigin[2] }
, mChildPerspective(aSource.mChildPerspective)
, mPerspectiveOrigin{ aSource.mPerspectiveOrigin[0],
aSource.mPerspectiveOrigin[1] }
, mVerticalAlign(aSource.mVerticalAlign)
, mTransitions(aSource.mTransitions)
, mTransitionTimingFunctionCount(aSource.mTransitionTimingFunctionCount)
, mTransitionDurationCount(aSource.mTransitionDurationCount)
, mTransitionDelayCount(aSource.mTransitionDelayCount)
, mTransitionPropertyCount(aSource.mTransitionPropertyCount)
, mAnimations(aSource.mAnimations)
, mAnimationTimingFunctionCount(aSource.mAnimationTimingFunctionCount)
, mAnimationDurationCount(aSource.mAnimationDurationCount)
, mAnimationDelayCount(aSource.mAnimationDelayCount)
, mAnimationNameCount(aSource.mAnimationNameCount)
, mAnimationDirectionCount(aSource.mAnimationDirectionCount)
, mAnimationFillModeCount(aSource.mAnimationFillModeCount)
, mAnimationPlayStateCount(aSource.mAnimationPlayStateCount)
, mAnimationIterationCountCount(aSource.mAnimationIterationCountCount)
, mShapeOutside(aSource.mShapeOutside)
{
MOZ_COUNT_CTOR(nsStyleDisplay);
}
nsChangeHint
nsStyleDisplay::CalcDifference(const nsStyleDisplay& aNewData) const
{
nsChangeHint hint = nsChangeHint(0);
if (!DefinitelyEqualURIsAndPrincipal(mBinding, aNewData.mBinding)
|| mPosition != aNewData.mPosition
|| mDisplay != aNewData.mDisplay
|| mContain != aNewData.mContain
|| (mFloat == StyleFloat::None) != (aNewData.mFloat == StyleFloat::None)
|| mOverflowX != aNewData.mOverflowX
|| mOverflowY != aNewData.mOverflowY
|| mScrollBehavior != aNewData.mScrollBehavior
|| mScrollSnapTypeX != aNewData.mScrollSnapTypeX
|| mScrollSnapTypeY != aNewData.mScrollSnapTypeY
|| mScrollSnapPointsX != aNewData.mScrollSnapPointsX
|| mScrollSnapPointsY != aNewData.mScrollSnapPointsY
|| mScrollSnapDestination != aNewData.mScrollSnapDestination
|| mTopLayer != aNewData.mTopLayer
|| mResize != aNewData.mResize) {
hint |= nsChangeHint_ReconstructFrame;
}
/* Note: When mScrollBehavior, mScrollSnapTypeX, mScrollSnapTypeY,
* mScrollSnapPointsX, mScrollSnapPointsY, or mScrollSnapDestination are
* changed, nsChangeHint_NeutralChange is not sufficient to enter
* nsCSSFrameConstructor::PropagateScrollToViewport. By using the same hint
* as used when the overflow css property changes,
* nsChangeHint_ReconstructFrame, PropagateScrollToViewport will be called.
*
* The scroll-behavior css property is not expected to change often (the
* CSSOM-View DOM methods are likely to be used in those cases); however,
* if this does become common perhaps a faster-path might be worth while.
*/
if ((mAppearance == NS_THEME_TEXTFIELD &&
aNewData.mAppearance != NS_THEME_TEXTFIELD) ||
(mAppearance != NS_THEME_TEXTFIELD &&
aNewData.mAppearance == NS_THEME_TEXTFIELD)) {
// This is for <input type=number> where we allow authors to specify a
// |-moz-appearance:textfield| to get a control without a spinner. (The
// spinner is present for |-moz-appearance:number-input| but also other
// values such as 'none'.) We need to reframe since we want to use
// nsTextControlFrame instead of nsNumberControlFrame if the author
// specifies 'textfield'.
return nsChangeHint_ReconstructFrame;
}
if (mFloat != aNewData.mFloat) {
// Changing which side we float on doesn't affect descendants directly
hint |= nsChangeHint_AllReflowHints &
~(nsChangeHint_ClearDescendantIntrinsics |
nsChangeHint_NeedDirtyReflow);
}
if (mVerticalAlign != aNewData.mVerticalAlign) {
// XXX Can this just be AllReflowHints + RepaintFrame, and be included in
// the block below?
hint |= NS_STYLE_HINT_REFLOW;
}
// XXX the following is conservative, for now: changing float breaking shouldn't
// necessarily require a repaint, reflow should suffice.
if (mBreakType != aNewData.mBreakType
|| mBreakInside != aNewData.mBreakInside
|| mBreakBefore != aNewData.mBreakBefore
|| mBreakAfter != aNewData.mBreakAfter
|| mAppearance != aNewData.mAppearance
|| mOrient != aNewData.mOrient
|| mOverflowClipBox != aNewData.mOverflowClipBox) {
hint |= nsChangeHint_AllReflowHints |
nsChangeHint_RepaintFrame;
}
if (mIsolation != aNewData.mIsolation) {
hint |= nsChangeHint_RepaintFrame;
}
/* 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 (HasTransformStyle() != aNewData.HasTransformStyle()) {
// We do not need to apply nsChangeHint_UpdateTransformLayer since
// nsChangeHint_RepaintFrame will forcibly invalidate the frame area and
// ensure layers are rebuilt (or removed).
hint |= nsChangeHint_UpdateContainingBlock |
nsChangeHint_AddOrRemoveTransform |
nsChangeHint_UpdateOverflow |
nsChangeHint_RepaintFrame;
} else {
/* 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 recompute its overflow rect (which probably changed
* if the transform changed) and to redraw within the bounds of that new
* overflow rect.
*
* If the property isn't present in either style struct, we still do the
* comparisons but turn all the resulting change hints into
* nsChangeHint_NeutralChange.
*/
nsChangeHint transformHint = nsChangeHint(0);
if (!mSpecifiedTransform != !aNewData.mSpecifiedTransform ||
(mSpecifiedTransform &&
*mSpecifiedTransform != *aNewData.mSpecifiedTransform)) {
transformHint |= nsChangeHint_UpdateTransformLayer;
if (mSpecifiedTransform &&
aNewData.mSpecifiedTransform) {
transformHint |= nsChangeHint_UpdatePostTransformOverflow;
} else {
transformHint |= nsChangeHint_UpdateOverflow;
}
}
const nsChangeHint kUpdateOverflowAndRepaintHint =
nsChangeHint_UpdateOverflow | nsChangeHint_RepaintFrame;
for (uint8_t index = 0; index < 3; ++index) {
if (mTransformOrigin[index] != aNewData.mTransformOrigin[index]) {
transformHint |= nsChangeHint_UpdateTransformLayer |
nsChangeHint_UpdatePostTransformOverflow;
break;
}
}
for (uint8_t index = 0; index < 2; ++index) {
if (mPerspectiveOrigin[index] != aNewData.mPerspectiveOrigin[index]) {
transformHint |= kUpdateOverflowAndRepaintHint;
break;
}
}
if (HasPerspectiveStyle() != aNewData.HasPerspectiveStyle()) {
// A change from/to being a containing block for position:fixed.
hint |= nsChangeHint_UpdateContainingBlock;
}
if (mChildPerspective != aNewData.mChildPerspective ||
mTransformStyle != aNewData.mTransformStyle ||
mTransformBox != aNewData.mTransformBox) {
transformHint |= kUpdateOverflowAndRepaintHint;
}
if (mBackfaceVisibility != aNewData.mBackfaceVisibility) {
transformHint |= nsChangeHint_RepaintFrame;
}
if (transformHint) {
if (HasTransformStyle()) {
hint |= transformHint;
} else {
hint |= nsChangeHint_NeutralChange;
}
}
}
// Note that the HasTransformStyle() != aNewData.HasTransformStyle()
// test above handles relevant changes in the
// NS_STYLE_WILL_CHANGE_TRANSFORM bit, which in turn handles frame
// reconstruction for changes in the containing block of
// fixed-positioned elements.
uint8_t willChangeBitsChanged =
mWillChangeBitField ^ aNewData.mWillChangeBitField;
if (willChangeBitsChanged & (NS_STYLE_WILL_CHANGE_STACKING_CONTEXT |
NS_STYLE_WILL_CHANGE_SCROLL |
NS_STYLE_WILL_CHANGE_OPACITY)) {
hint |= nsChangeHint_RepaintFrame;
}
if (willChangeBitsChanged & NS_STYLE_WILL_CHANGE_FIXPOS_CB) {
hint |= nsChangeHint_UpdateContainingBlock;
}
// If touch-action is changed, we need to regenerate the event regions on
// the layers and send it over to the compositor for APZ to handle.
if (mTouchAction != aNewData.mTouchAction) {
hint |= nsChangeHint_RepaintFrame;
}
// 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.
// Note: Likewise, for animation-*, the animation manager gets
// notified about every new style context constructed, and it uses
// that opportunity to handle dynamic changes appropriately.
// But we still need to return nsChangeHint_NeutralChange for these
// properties, since some data did change in the style struct.
if (!hint &&
(mOriginalDisplay != aNewData.mOriginalDisplay ||
mOriginalFloat != aNewData.mOriginalFloat ||
mTransitions != aNewData.mTransitions ||
mTransitionTimingFunctionCount !=
aNewData.mTransitionTimingFunctionCount ||
mTransitionDurationCount != aNewData.mTransitionDurationCount ||
mTransitionDelayCount != aNewData.mTransitionDelayCount ||
mTransitionPropertyCount != aNewData.mTransitionPropertyCount ||
mAnimations != aNewData.mAnimations ||
mAnimationTimingFunctionCount != aNewData.mAnimationTimingFunctionCount ||
mAnimationDurationCount != aNewData.mAnimationDurationCount ||
mAnimationDelayCount != aNewData.mAnimationDelayCount ||
mAnimationNameCount != aNewData.mAnimationNameCount ||
mAnimationDirectionCount != aNewData.mAnimationDirectionCount ||
mAnimationFillModeCount != aNewData.mAnimationFillModeCount ||
mAnimationPlayStateCount != aNewData.mAnimationPlayStateCount ||
mAnimationIterationCountCount != aNewData.mAnimationIterationCountCount ||
mScrollSnapCoordinate != aNewData.mScrollSnapCoordinate ||
mShapeOutside != aNewData.mShapeOutside)) {
hint |= nsChangeHint_NeutralChange;
}
return hint;
}
// --------------------
// nsStyleVisibility
//
nsStyleVisibility::nsStyleVisibility(StyleStructContext aContext)
: mDirection(aContext.GetBidi() == IBMBIDI_TEXTDIRECTION_RTL
? NS_STYLE_DIRECTION_RTL
: NS_STYLE_DIRECTION_LTR)
, mVisible(NS_STYLE_VISIBILITY_VISIBLE)
, mImageRendering(NS_STYLE_IMAGE_RENDERING_AUTO)
, mWritingMode(NS_STYLE_WRITING_MODE_HORIZONTAL_TB)
, mTextOrientation(NS_STYLE_TEXT_ORIENTATION_MIXED)
, mColorAdjust(NS_STYLE_COLOR_ADJUST_ECONOMY)
{
MOZ_COUNT_CTOR(nsStyleVisibility);
}
nsStyleVisibility::nsStyleVisibility(const nsStyleVisibility& aSource)
: mImageOrientation(aSource.mImageOrientation)
, mDirection(aSource.mDirection)
, mVisible(aSource.mVisible)
, mImageRendering(aSource.mImageRendering)
, mWritingMode(aSource.mWritingMode)
, mTextOrientation(aSource.mTextOrientation)
, mColorAdjust(aSource.mColorAdjust)
{
MOZ_COUNT_CTOR(nsStyleVisibility);
}
nsChangeHint
nsStyleVisibility::CalcDifference(const nsStyleVisibility& aNewData) const
{
nsChangeHint hint = nsChangeHint(0);
if (mDirection != aNewData.mDirection || mWritingMode != aNewData.mWritingMode) {
// It's important that a change in mWritingMode results in frame
// reconstruction, because it may affect intrinsic size (see
// nsSubDocumentFrame::GetIntrinsicISize/BSize).
hint |= nsChangeHint_ReconstructFrame;
} else {
if ((mImageOrientation != aNewData.mImageOrientation)) {
hint |= nsChangeHint_AllReflowHints |
nsChangeHint_RepaintFrame;
}
if (mVisible != aNewData.mVisible) {
if ((NS_STYLE_VISIBILITY_COLLAPSE == mVisible) ||
(NS_STYLE_VISIBILITY_COLLAPSE == aNewData.mVisible)) {
hint |= NS_STYLE_HINT_REFLOW;
} else {
hint |= NS_STYLE_HINT_VISUAL;
}
}
if (mTextOrientation != aNewData.mTextOrientation) {
hint |= NS_STYLE_HINT_REFLOW;
}
if (mImageRendering != aNewData.mImageRendering) {
hint |= nsChangeHint_RepaintFrame;
}
if (mColorAdjust != aNewData.mColorAdjust) {
// color-adjust only affects media where dynamic changes can't happen.
hint |= nsChangeHint_NeutralChange;
}
}
return hint;
}
nsStyleContentData::~nsStyleContentData()
{
MOZ_COUNT_DTOR(nsStyleContentData);
MOZ_ASSERT(!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) {
free(mContent.mString);
}
}
nsStyleContentData::nsStyleContentData(const nsStyleContentData& aOther)
: mType(aOther.mType)
#ifdef DEBUG
, mImageTracked(false)
#endif
{
MOZ_COUNT_CTOR(nsStyleContentData);
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 = nullptr;
}
}
nsStyleContentData&
nsStyleContentData::operator=(const nsStyleContentData& aOther)
{
if (this == &aOther) {
return *this;
}
this->~nsStyleContentData();
new (this) nsStyleContentData(aOther);
return *this;
}
bool
nsStyleContentData::operator==(const nsStyleContentData& aOther) const
{
if (mType != aOther.mType) {
return false;
}
if (mType == eStyleContentType_Image) {
if (!mContent.mImage || !aOther.mContent.mImage) {
return mContent.mImage == aOther.mContent.mImage;
}
bool 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 safe_strcmp(mContent.mString, aOther.mContent.mString) == 0;
}
void
nsStyleContentData::TrackImage(ImageTracker* aImageTracker)
{
// Sanity
MOZ_ASSERT(!mImageTracked, "Already tracking image!");
MOZ_ASSERT(mType == eStyleContentType_Image,
"Trying to do image tracking on non-image!");
MOZ_ASSERT(mContent.mImage,
"Can't track image when there isn't one!");
aImageTracker->Add(mContent.mImage);
// Mark state
#ifdef DEBUG
mImageTracked = true;
#endif
}
void
nsStyleContentData::UntrackImage(ImageTracker* aImageTracker)
{
// Sanity
MOZ_ASSERT(mImageTracked, "Image not tracked!");
MOZ_ASSERT(mType == eStyleContentType_Image,
"Trying to do image tracking on non-image!");
MOZ_ASSERT(mContent.mImage,
"Can't untrack image when there isn't one!");
aImageTracker->Remove(mContent.mImage);
// Mark state
#ifdef DEBUG
mImageTracked = false;
#endif
}
//-----------------------
// nsStyleContent
//
nsStyleContent::nsStyleContent(StyleStructContext aContext)
{
MOZ_COUNT_CTOR(nsStyleContent);
}
nsStyleContent::~nsStyleContent()
{
MOZ_COUNT_DTOR(nsStyleContent);
}
void
nsStyleContent::Destroy(nsPresContext* aContext)
{
// Unregister any images we might have with the document.
for (auto& content : mContents) {
if (content.mType == eStyleContentType_Image && content.mContent.mImage) {
content.UntrackImage(aContext->Document()->ImageTracker());
}
}
this->~nsStyleContent();
aContext->PresShell()->FreeByObjectID(eArenaObjectID_nsStyleContent, this);
}
nsStyleContent::nsStyleContent(const nsStyleContent& aSource)
: mContents(aSource.mContents)
, mIncrements(aSource.mIncrements)
, mResets(aSource.mResets)
{
MOZ_COUNT_CTOR(nsStyleContent);
}
nsChangeHint
nsStyleContent::CalcDifference(const nsStyleContent& aNewData) const
{
// In ElementRestyler::Restyle 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 ElementRestyler::Restyle 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 ElementRestyler::Restyle.
// Unfortunately we need to reframe even if the content lengths are the same;
// a simple reflow will not pick up different text or different image URLs,
// since we set all that up in the CSSFrameConstructor
if (mContents != aNewData.mContents ||
mIncrements != aNewData.mIncrements ||
mResets != aNewData.mResets) {
return nsChangeHint_ReconstructFrame;
}
return nsChangeHint(0);
}
// --------------------
// nsStyleTextReset
//
nsStyleTextReset::nsStyleTextReset(StyleStructContext aContext)
: mTextDecorationLine(NS_STYLE_TEXT_DECORATION_LINE_NONE)
, mTextDecorationStyle(NS_STYLE_TEXT_DECORATION_STYLE_SOLID)
, mUnicodeBidi(NS_STYLE_UNICODE_BIDI_NORMAL)
, mInitialLetterSink(0)
, mInitialLetterSize(0.0f)
, mTextDecorationColor(StyleComplexColor::CurrentColor())
{
MOZ_COUNT_CTOR(nsStyleTextReset);
}
nsStyleTextReset::nsStyleTextReset(const nsStyleTextReset& aSource)
{
MOZ_COUNT_CTOR(nsStyleTextReset);
*this = aSource;
}
nsStyleTextReset::~nsStyleTextReset()
{
MOZ_COUNT_DTOR(nsStyleTextReset);
}
nsChangeHint
nsStyleTextReset::CalcDifference(const nsStyleTextReset& aNewData) const
{
if (mUnicodeBidi != aNewData.mUnicodeBidi ||
mInitialLetterSink != aNewData.mInitialLetterSink ||
mInitialLetterSize != aNewData.mInitialLetterSize) {
return NS_STYLE_HINT_REFLOW;
}
if (mTextDecorationLine != aNewData.mTextDecorationLine ||
mTextDecorationStyle != aNewData.mTextDecorationStyle) {
// Changes to our text-decoration line can impact our overflow area &
// also our descendants' overflow areas (particularly for text-frame
// descendants). So, we update those areas & trigger a repaint.
return nsChangeHint_RepaintFrame |
nsChangeHint_UpdateSubtreeOverflow |
nsChangeHint_SchedulePaint;
}
// Repaint for decoration color changes
if (mTextDecorationColor != aNewData.mTextDecorationColor) {
return nsChangeHint_RepaintFrame;
}
if (mTextOverflow != aNewData.mTextOverflow) {
return nsChangeHint_RepaintFrame;
}
return nsChangeHint(0);
}
// Returns true if the given shadow-arrays are equal.
static bool
AreShadowArraysEqual(nsCSSShadowArray* lhs,
nsCSSShadowArray* rhs)
{
if (lhs == rhs) {
return true;
}
if (!lhs || !rhs || lhs->Length() != rhs->Length()) {
return false;
}
for (uint32_t i = 0; i < lhs->Length(); ++i) {
if (*lhs->ShadowAt(i) != *rhs->ShadowAt(i)) {
return false;
}
}
return true;
}
// --------------------
// nsStyleText
//
nsStyleText::nsStyleText(StyleStructContext aContext)
: mTextAlign(NS_STYLE_TEXT_ALIGN_START)
, mTextAlignLast(NS_STYLE_TEXT_ALIGN_AUTO)
, mTextAlignTrue(false)
, mTextAlignLastTrue(false)
, mTextTransform(NS_STYLE_TEXT_TRANSFORM_NONE)
, mWhiteSpace(NS_STYLE_WHITESPACE_NORMAL)
, mWordBreak(NS_STYLE_WORDBREAK_NORMAL)
, mOverflowWrap(NS_STYLE_OVERFLOWWRAP_NORMAL)
, mHyphens(NS_STYLE_HYPHENS_MANUAL)
, mRubyAlign(NS_STYLE_RUBY_ALIGN_SPACE_AROUND)
, mRubyPosition(NS_STYLE_RUBY_POSITION_OVER)
, mTextSizeAdjust(NS_STYLE_TEXT_SIZE_ADJUST_AUTO)
, mTextCombineUpright(NS_STYLE_TEXT_COMBINE_UPRIGHT_NONE)
, mControlCharacterVisibility(nsCSSParser::ControlCharVisibilityDefault())
, mTextEmphasisStyle(NS_STYLE_TEXT_EMPHASIS_STYLE_NONE)
, mTextRendering(NS_STYLE_TEXT_RENDERING_AUTO)
, mTabSize(NS_STYLE_TABSIZE_INITIAL)
, mTextEmphasisColor(StyleComplexColor::CurrentColor())
, mWebkitTextFillColor(StyleComplexColor::CurrentColor())
, mWebkitTextStrokeColor(StyleComplexColor::CurrentColor())
, mWordSpacing(0, nsStyleCoord::CoordConstructor)
, mLetterSpacing(eStyleUnit_Normal)
, mLineHeight(eStyleUnit_Normal)
, mTextIndent(0, nsStyleCoord::CoordConstructor)
, mWebkitTextStrokeWidth(0, nsStyleCoord::CoordConstructor)
, mTextShadow(nullptr)
{
MOZ_COUNT_CTOR(nsStyleText);
nsCOMPtr<nsIAtom> language = aContext.GetContentLanguage();
mTextEmphasisPosition = language &&
nsStyleUtil::MatchesLanguagePrefix(language, u"zh") ?
NS_STYLE_TEXT_EMPHASIS_POSITION_DEFAULT_ZH :
NS_STYLE_TEXT_EMPHASIS_POSITION_DEFAULT;
}
nsStyleText::nsStyleText(const nsStyleText& aSource)
: mTextAlign(aSource.mTextAlign)
, mTextAlignLast(aSource.mTextAlignLast)
, mTextAlignTrue(false)
, mTextAlignLastTrue(false)
, mTextTransform(aSource.mTextTransform)
, mWhiteSpace(aSource.mWhiteSpace)
, mWordBreak(aSource.mWordBreak)
, mOverflowWrap(aSource.mOverflowWrap)
, mHyphens(aSource.mHyphens)
, mRubyAlign(aSource.mRubyAlign)
, mRubyPosition(aSource.mRubyPosition)
, mTextSizeAdjust(aSource.mTextSizeAdjust)
, mTextCombineUpright(aSource.mTextCombineUpright)
, mControlCharacterVisibility(aSource.mControlCharacterVisibility)
, mTextEmphasisPosition(aSource.mTextEmphasisPosition)
, mTextEmphasisStyle(aSource.mTextEmphasisStyle)
, mTextRendering(aSource.mTextRendering)
, mTabSize(aSource.mTabSize)
, mTextEmphasisColor(aSource.mTextEmphasisColor)
, mWebkitTextFillColor(aSource.mWebkitTextFillColor)
, mWebkitTextStrokeColor(aSource.mWebkitTextStrokeColor)
, mWordSpacing(aSource.mWordSpacing)
, mLetterSpacing(aSource.mLetterSpacing)
, mLineHeight(aSource.mLineHeight)
, mTextIndent(aSource.mTextIndent)
, mWebkitTextStrokeWidth(aSource.mWebkitTextStrokeWidth)
, mTextShadow(aSource.mTextShadow)
, mTextEmphasisStyleString(aSource.mTextEmphasisStyleString)
{
MOZ_COUNT_CTOR(nsStyleText);
}
nsStyleText::~nsStyleText()
{
MOZ_COUNT_DTOR(nsStyleText);
}
nsChangeHint
nsStyleText::CalcDifference(const nsStyleText& aNewData) const
{
if (WhiteSpaceOrNewlineIsSignificant() !=
aNewData.WhiteSpaceOrNewlineIsSignificant()) {
// This may require construction of suppressed text frames
return nsChangeHint_ReconstructFrame;
}
if (mTextCombineUpright != aNewData.mTextCombineUpright ||
mControlCharacterVisibility != aNewData.mControlCharacterVisibility) {
return nsChangeHint_ReconstructFrame;
}
if ((mTextAlign != aNewData.mTextAlign) ||
(mTextAlignLast != aNewData.mTextAlignLast) ||
(mTextAlignTrue != aNewData.mTextAlignTrue) ||
(mTextAlignLastTrue != aNewData.mTextAlignLastTrue) ||
(mTextTransform != aNewData.mTextTransform) ||
(mWhiteSpace != aNewData.mWhiteSpace) ||
(mWordBreak != aNewData.mWordBreak) ||
(mOverflowWrap != aNewData.mOverflowWrap) ||
(mHyphens != aNewData.mHyphens) ||
(mRubyAlign != aNewData.mRubyAlign) ||
(mRubyPosition != aNewData.mRubyPosition) ||
(mTextSizeAdjust != aNewData.mTextSizeAdjust) ||
(mLetterSpacing != aNewData.mLetterSpacing) ||
(mLineHeight != aNewData.mLineHeight) ||
(mTextIndent != aNewData.mTextIndent) ||
(mWordSpacing != aNewData.mWordSpacing) ||
(mTabSize != aNewData.mTabSize)) {
return NS_STYLE_HINT_REFLOW;
}
if (HasTextEmphasis() != aNewData.HasTextEmphasis() ||
(HasTextEmphasis() &&
mTextEmphasisPosition != aNewData.mTextEmphasisPosition)) {
// Text emphasis position change could affect line height calculation.
return nsChangeHint_AllReflowHints |
nsChangeHint_RepaintFrame;
}
nsChangeHint hint = nsChangeHint(0);
// text-rendering changes require a reflow since they change SVG
// frames' rects.
if (mTextRendering != aNewData.mTextRendering) {
hint |= nsChangeHint_NeedReflow |
nsChangeHint_NeedDirtyReflow | // XXX remove me: bug 876085
nsChangeHint_RepaintFrame;
}
if (!AreShadowArraysEqual(mTextShadow, aNewData.mTextShadow) ||
mTextEmphasisStyle != aNewData.mTextEmphasisStyle ||
mTextEmphasisStyleString != aNewData.mTextEmphasisStyleString ||
mWebkitTextStrokeWidth != aNewData.mWebkitTextStrokeWidth) {
hint |= nsChangeHint_UpdateSubtreeOverflow |
nsChangeHint_SchedulePaint |
nsChangeHint_RepaintFrame;
// We don't add any other hints below.
return hint;
}
if (mTextEmphasisColor != aNewData.mTextEmphasisColor ||
mWebkitTextFillColor != aNewData.mWebkitTextFillColor ||
mWebkitTextStrokeColor != aNewData.mWebkitTextStrokeColor) {
hint |= nsChangeHint_SchedulePaint |
nsChangeHint_RepaintFrame;
}
if (hint) {
return hint;
}
if (mTextEmphasisPosition != aNewData.mTextEmphasisPosition) {
return nsChangeHint_NeutralChange;
}
return nsChangeHint(0);
}
LogicalSide
nsStyleText::TextEmphasisSide(WritingMode aWM) const
{
MOZ_ASSERT(
(!(mTextEmphasisPosition & NS_STYLE_TEXT_EMPHASIS_POSITION_LEFT) !=
!(mTextEmphasisPosition & NS_STYLE_TEXT_EMPHASIS_POSITION_RIGHT)) &&
(!(mTextEmphasisPosition & NS_STYLE_TEXT_EMPHASIS_POSITION_OVER) !=
!(mTextEmphasisPosition & NS_STYLE_TEXT_EMPHASIS_POSITION_UNDER)));
mozilla::Side side = aWM.IsVertical() ?
(mTextEmphasisPosition & NS_STYLE_TEXT_EMPHASIS_POSITION_LEFT
? eSideLeft : eSideRight) :
(mTextEmphasisPosition & NS_STYLE_TEXT_EMPHASIS_POSITION_OVER
? eSideTop : eSideBottom);
LogicalSide result = aWM.LogicalSideForPhysicalSide(side);
MOZ_ASSERT(IsBlock(result));
return result;
}
//-----------------------
// nsStyleUserInterface
//
nsCursorImage::nsCursorImage()
: mHaveHotspot(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(nullptr);
}
nsCursorImage&
nsCursorImage::operator=(const nsCursorImage& aOther)
{
if (this != &aOther) {
mHaveHotspot = aOther.mHaveHotspot;
mHotspotX = aOther.mHotspotX;
mHotspotY = aOther.mHotspotY;
SetImage(aOther.GetImage());
}
return *this;
}
bool
nsCursorImage::operator==(const nsCursorImage& aOther) const
{
NS_ASSERTION(mHaveHotspot ||
(mHotspotX == 0 && mHotspotY == 0),
"expected mHotspot{X,Y} to be 0 when mHaveHotspot is false");
NS_ASSERTION(aOther.mHaveHotspot ||
(aOther.mHotspotX == 0 && aOther.mHotspotY == 0),
"expected mHotspot{X,Y} to be 0 when mHaveHotspot is false");
return mHaveHotspot == aOther.mHaveHotspot &&
mHotspotX == aOther.mHotspotX &&
mHotspotY == aOther.mHotspotY &&
EqualImages(mImage, aOther.mImage);
}
nsStyleUserInterface::nsStyleUserInterface(StyleStructContext aContext)
: mUserInput(StyleUserInput::Auto)
, mUserModify(StyleUserModify::ReadOnly)
, mUserFocus(StyleUserFocus::None)
, mPointerEvents(NS_STYLE_POINTER_EVENTS_AUTO)
, mCursor(NS_STYLE_CURSOR_AUTO)
{
MOZ_COUNT_CTOR(nsStyleUserInterface);
}
nsStyleUserInterface::nsStyleUserInterface(const nsStyleUserInterface& aSource)
: mUserInput(aSource.mUserInput)
, mUserModify(aSource.mUserModify)
, mUserFocus(aSource.mUserFocus)
, mPointerEvents(aSource.mPointerEvents)
, mCursor(aSource.mCursor)
, mCursorImages(aSource.mCursorImages)
{
MOZ_COUNT_CTOR(nsStyleUserInterface);
}
nsStyleUserInterface::~nsStyleUserInterface()
{
MOZ_COUNT_DTOR(nsStyleUserInterface);
}
nsChangeHint
nsStyleUserInterface::CalcDifference(const nsStyleUserInterface& aNewData) const
{
nsChangeHint hint = nsChangeHint(0);
if (mCursor != aNewData.mCursor) {
hint |= nsChangeHint_UpdateCursor;
}
// We could do better. But it wouldn't be worth it, URL-specified cursors are
// rare.
if (mCursorImages != aNewData.mCursorImages) {
hint |= nsChangeHint_UpdateCursor;
}
if (mPointerEvents != aNewData.mPointerEvents) {
// nsSVGPathGeometryFrame's mRect depends on stroke _and_ on the value
// of pointer-events. See nsSVGPathGeometryFrame::ReflowSVG's use of
// GetHitTestFlags. (Only a reflow, no visual change.)
hint |= nsChangeHint_NeedReflow |
nsChangeHint_NeedDirtyReflow; // XXX remove me: bug 876085
}
if (mUserModify != aNewData.mUserModify) {
hint |= NS_STYLE_HINT_VISUAL;
}
if (mUserInput != aNewData.mUserInput) {
if (StyleUserInput::None == mUserInput ||
StyleUserInput::None == aNewData.mUserInput) {
hint |= nsChangeHint_ReconstructFrame;
} else {
hint |= nsChangeHint_NeutralChange;
}
}
if (mUserFocus != aNewData.mUserFocus) {
hint |= nsChangeHint_NeutralChange;
}
return hint;
}
//-----------------------
// nsStyleUIReset
//
nsStyleUIReset::nsStyleUIReset(StyleStructContext aContext)
: mUserSelect(StyleUserSelect::Auto)
, mForceBrokenImageIcon(0)
, mIMEMode(NS_STYLE_IME_MODE_AUTO)
, mWindowDragging(StyleWindowDragging::Default)
, mWindowShadow(NS_STYLE_WINDOW_SHADOW_DEFAULT)
{
MOZ_COUNT_CTOR(nsStyleUIReset);
}
nsStyleUIReset::nsStyleUIReset(const nsStyleUIReset& aSource)
: mUserSelect(aSource.mUserSelect)
, mForceBrokenImageIcon(aSource.mForceBrokenImageIcon)
, mIMEMode(aSource.mIMEMode)
, mWindowDragging(aSource.mWindowDragging)
, mWindowShadow(aSource.mWindowShadow)
{
MOZ_COUNT_CTOR(nsStyleUIReset);
}
nsStyleUIReset::~nsStyleUIReset()
{
MOZ_COUNT_DTOR(nsStyleUIReset);
}
nsChangeHint
nsStyleUIReset::CalcDifference(const nsStyleUIReset& aNewData) const
{
// ignore mIMEMode
if (mForceBrokenImageIcon != aNewData.mForceBrokenImageIcon) {
return nsChangeHint_ReconstructFrame;
}
if (mWindowShadow != aNewData.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 != aNewData.mUserSelect) {
return NS_STYLE_HINT_VISUAL;
}
if (mWindowDragging != aNewData.mWindowDragging) {
return nsChangeHint_SchedulePaint;
}
return nsChangeHint(0);
}
//-----------------------
// nsStyleVariables
//
nsStyleVariables::nsStyleVariables(StyleStructContext aContext)
{
MOZ_COUNT_CTOR(nsStyleVariables);
}
nsStyleVariables::nsStyleVariables(const nsStyleVariables& aSource)
: mVariables(aSource.mVariables)
{
MOZ_COUNT_CTOR(nsStyleVariables);
}
nsStyleVariables::~nsStyleVariables()
{
MOZ_COUNT_DTOR(nsStyleVariables);
}
nsChangeHint
nsStyleVariables::CalcDifference(const nsStyleVariables& aNewData) const
{
return nsChangeHint(0);
}
//-----------------------
// nsStyleEffects
//
nsStyleEffects::nsStyleEffects(StyleStructContext aContext)
: mBoxShadow(nullptr)
, mClip(0, 0, 0, 0)
, mOpacity(1.0f)
, mClipFlags(NS_STYLE_CLIP_AUTO)
, mMixBlendMode(NS_STYLE_BLEND_NORMAL)
{
MOZ_COUNT_CTOR(nsStyleEffects);
}
nsStyleEffects::nsStyleEffects(const nsStyleEffects& aSource)
: mFilters(aSource.mFilters)
, mBoxShadow(aSource.mBoxShadow)
, mClip(aSource.mClip)
, mOpacity(aSource.mOpacity)
, mClipFlags(aSource.mClipFlags)
, mMixBlendMode(aSource.mMixBlendMode)
{
MOZ_COUNT_CTOR(nsStyleEffects);
}
nsStyleEffects::~nsStyleEffects()
{
MOZ_COUNT_DTOR(nsStyleEffects);
}
nsChangeHint
nsStyleEffects::CalcDifference(const nsStyleEffects& aNewData) const
{
nsChangeHint hint = nsChangeHint(0);
if (!AreShadowArraysEqual(mBoxShadow, aNewData.mBoxShadow)) {
// Update overflow regions & trigger DLBI to be sure it's noticed.
// Also request a repaint, since it's possible that only the color
// of the shadow is changing (and UpdateOverflow/SchedulePaint won't
// repaint for that, since they won't know what needs invalidating.)
hint |= nsChangeHint_UpdateOverflow |
nsChangeHint_SchedulePaint |
nsChangeHint_RepaintFrame;
}
if (mClipFlags != aNewData.mClipFlags) {
hint |= nsChangeHint_AllReflowHints |
nsChangeHint_RepaintFrame;
}
if (!mClip.IsEqualInterior(aNewData.mClip)) {
// If the clip has changed, we just need to update overflow areas. DLBI
// will handle the invalidation.
hint |= nsChangeHint_UpdateOverflow |
nsChangeHint_SchedulePaint;
}
if (mOpacity != aNewData.mOpacity) {
// If we're going from the optimized >=0.99 opacity value to 1.0 or back, then
// repaint the frame because DLBI will not catch the invalidation. Otherwise,
// just update the opacity layer.
if ((mOpacity >= 0.99f && mOpacity < 1.0f && aNewData.mOpacity == 1.0f) ||
(aNewData.mOpacity >= 0.99f && aNewData.mOpacity < 1.0f && mOpacity == 1.0f)) {
hint |= nsChangeHint_RepaintFrame;
} else {
hint |= nsChangeHint_UpdateOpacityLayer;
if ((mOpacity == 1.0f) != (aNewData.mOpacity == 1.0f)) {
hint |= nsChangeHint_UpdateUsesOpacity;
}
}
}
if (HasFilters() != aNewData.HasFilters()) {
// A change from/to being a containing block for position:fixed.
hint |= nsChangeHint_UpdateContainingBlock;
}
if (mFilters != aNewData.mFilters) {
hint |= nsChangeHint_UpdateEffects |
nsChangeHint_RepaintFrame |
nsChangeHint_UpdateOverflow;
}
if (mMixBlendMode != aNewData.mMixBlendMode) {
hint |= nsChangeHint_RepaintFrame;
}
if (!hint &&
!mClip.IsEqualEdges(aNewData.mClip)) {
hint |= nsChangeHint_NeutralChange;
}
return hint;
}