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/*
* Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2014 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "FillLayer.h"
#include <wtf/PointerComparison.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
struct SameSizeAsFillLayer {
FillLayer* next;
RefPtr<StyleImage> image;
Length x;
Length y;
LengthSize sizeLength;
unsigned bitfields : 32;
unsigned bitfields2 : 11;
};
COMPILE_ASSERT(sizeof(FillLayer) == sizeof(SameSizeAsFillLayer), FillLayer_should_stay_small);
FillLayer::FillLayer(EFillLayerType type)
: m_image(FillLayer::initialFillImage(type))
, m_xPosition(FillLayer::initialFillXPosition(type))
, m_yPosition(FillLayer::initialFillYPosition(type))
, m_attachment(FillLayer::initialFillAttachment(type))
, m_clip(FillLayer::initialFillClip(type))
, m_origin(FillLayer::initialFillOrigin(type))
, m_repeatX(FillLayer::initialFillRepeatX(type))
, m_repeatY(FillLayer::initialFillRepeatY(type))
, m_composite(FillLayer::initialFillComposite(type))
, m_sizeType(SizeNone)
, m_blendMode(FillLayer::initialFillBlendMode(type))
, m_maskSourceType(FillLayer::initialFillMaskSourceType(type))
, m_imageSet(false)
, m_attachmentSet(false)
, m_clipSet(false)
, m_originSet(false)
, m_repeatXSet(false)
, m_repeatYSet(false)
, m_xPosSet(false)
, m_yPosSet(false)
, m_backgroundXOriginSet(false)
, m_backgroundYOriginSet(false)
, m_backgroundXOrigin(static_cast<unsigned>(Edge::Left))
, m_backgroundYOrigin(static_cast<unsigned>(Edge::Top))
, m_compositeSet(type == MaskFillLayer)
, m_blendModeSet(false)
, m_maskSourceTypeSet(false)
, m_type(type)
{
}
FillLayer::FillLayer(const FillLayer& o)
: m_next(o.m_next ? std::make_unique<FillLayer>(*o.m_next) : nullptr)
, m_image(o.m_image)
, m_xPosition(o.m_xPosition)
, m_yPosition(o.m_yPosition)
, m_sizeLength(o.m_sizeLength)
, m_attachment(o.m_attachment)
, m_clip(o.m_clip)
, m_origin(o.m_origin)
, m_repeatX(o.m_repeatX)
, m_repeatY(o.m_repeatY)
, m_composite(o.m_composite)
, m_sizeType(o.m_sizeType)
, m_blendMode(o.m_blendMode)
, m_maskSourceType(o.m_maskSourceType)
, m_imageSet(o.m_imageSet)
, m_attachmentSet(o.m_attachmentSet)
, m_clipSet(o.m_clipSet)
, m_originSet(o.m_originSet)
, m_repeatXSet(o.m_repeatXSet)
, m_repeatYSet(o.m_repeatYSet)
, m_xPosSet(o.m_xPosSet)
, m_yPosSet(o.m_yPosSet)
, m_backgroundXOriginSet(o.m_backgroundXOriginSet)
, m_backgroundYOriginSet(o.m_backgroundYOriginSet)
, m_backgroundXOrigin(o.m_backgroundXOrigin)
, m_backgroundYOrigin(o.m_backgroundYOrigin)
, m_compositeSet(o.m_compositeSet)
, m_blendModeSet(o.m_blendModeSet)
, m_maskSourceTypeSet(o.m_maskSourceTypeSet)
, m_type(o.m_type)
{
}
FillLayer::~FillLayer()
{
// Delete the layers in a loop rather than allowing recursive calls to the destructors.
for (std::unique_ptr<FillLayer> next = WTFMove(m_next); next; next = WTFMove(next->m_next)) { }
}
FillLayer& FillLayer::operator=(const FillLayer& o)
{
m_next = o.m_next ? std::make_unique<FillLayer>(*o.m_next) : nullptr;
m_image = o.m_image;
m_xPosition = o.m_xPosition;
m_yPosition = o.m_yPosition;
m_backgroundXOrigin = o.m_backgroundXOrigin;
m_backgroundYOrigin = o.m_backgroundYOrigin;
m_backgroundXOriginSet = o.m_backgroundXOriginSet;
m_backgroundYOriginSet = o.m_backgroundYOriginSet;
m_sizeLength = o.m_sizeLength;
m_attachment = o.m_attachment;
m_clip = o.m_clip;
m_composite = o.m_composite;
m_blendMode = o.m_blendMode;
m_origin = o.m_origin;
m_repeatX = o.m_repeatX;
m_repeatY = o.m_repeatY;
m_sizeType = o.m_sizeType;
m_maskSourceType = o.m_maskSourceType;
m_imageSet = o.m_imageSet;
m_attachmentSet = o.m_attachmentSet;
m_clipSet = o.m_clipSet;
m_compositeSet = o.m_compositeSet;
m_blendModeSet = o.m_blendModeSet;
m_originSet = o.m_originSet;
m_repeatXSet = o.m_repeatXSet;
m_repeatYSet = o.m_repeatYSet;
m_xPosSet = o.m_xPosSet;
m_yPosSet = o.m_yPosSet;
m_maskSourceTypeSet = o.m_maskSourceTypeSet;
m_type = o.m_type;
return *this;
}
bool FillLayer::operator==(const FillLayer& o) const
{
// We do not check the "isSet" booleans for each property, since those are only used during initial construction
// to propagate patterns into layers. All layer comparisons happen after values have all been filled in anyway.
return arePointingToEqualData(m_image.get(), o.m_image.get()) && m_xPosition == o.m_xPosition && m_yPosition == o.m_yPosition
&& m_backgroundXOrigin == o.m_backgroundXOrigin && m_backgroundYOrigin == o.m_backgroundYOrigin
&& m_attachment == o.m_attachment && m_clip == o.m_clip && m_composite == o.m_composite
&& m_blendMode == o.m_blendMode && m_origin == o.m_origin && m_repeatX == o.m_repeatX
&& m_repeatY == o.m_repeatY && m_sizeType == o.m_sizeType && m_maskSourceType == o.m_maskSourceType
&& m_sizeLength == o.m_sizeLength && m_type == o.m_type
&& ((m_next && o.m_next) ? *m_next == *o.m_next : m_next == o.m_next);
}
void FillLayer::fillUnsetProperties()
{
FillLayer* curr;
for (curr = this; curr && curr->isXPositionSet(); curr = curr->next()) { }
if (curr && curr != this) {
// We need to fill in the remaining values with the pattern specified.
for (FillLayer* pattern = this; curr; curr = curr->next()) {
curr->m_xPosition = pattern->m_xPosition;
if (pattern->isBackgroundXOriginSet())
curr->m_backgroundXOrigin = pattern->m_backgroundXOrigin;
if (pattern->isBackgroundYOriginSet())
curr->m_backgroundYOrigin = pattern->m_backgroundYOrigin;
pattern = pattern->next();
if (pattern == curr || !pattern)
pattern = this;
}
}
for (curr = this; curr && curr->isYPositionSet(); curr = curr->next()) { }
if (curr && curr != this) {
// We need to fill in the remaining values with the pattern specified.
for (FillLayer* pattern = this; curr; curr = curr->next()) {
curr->m_yPosition = pattern->m_yPosition;
if (pattern->isBackgroundXOriginSet())
curr->m_backgroundXOrigin = pattern->m_backgroundXOrigin;
if (pattern->isBackgroundYOriginSet())
curr->m_backgroundYOrigin = pattern->m_backgroundYOrigin;
pattern = pattern->next();
if (pattern == curr || !pattern)
pattern = this;
}
}
for (curr = this; curr && curr->isAttachmentSet(); curr = curr->next()) { }
if (curr && curr != this) {
// We need to fill in the remaining values with the pattern specified.
for (FillLayer* pattern = this; curr; curr = curr->next()) {
curr->m_attachment = pattern->m_attachment;
pattern = pattern->next();
if (pattern == curr || !pattern)
pattern = this;
}
}
for (curr = this; curr && curr->isClipSet(); curr = curr->next()) { }
if (curr && curr != this) {
// We need to fill in the remaining values with the pattern specified.
for (FillLayer* pattern = this; curr; curr = curr->next()) {
curr->m_clip = pattern->m_clip;
pattern = pattern->next();
if (pattern == curr || !pattern)
pattern = this;
}
}
for (curr = this; curr && curr->isCompositeSet(); curr = curr->next()) { }
if (curr && curr != this) {
// We need to fill in the remaining values with the pattern specified.
for (FillLayer* pattern = this; curr; curr = curr->next()) {
curr->m_composite = pattern->m_composite;
pattern = pattern->next();
if (pattern == curr || !pattern)
pattern = this;
}
}
for (curr = this; curr && curr->isBlendModeSet(); curr = curr->next()) { }
if (curr && curr != this) {
// We need to fill in the remaining values with the pattern specified.
for (FillLayer* pattern = this; curr; curr = curr->next()) {
curr->m_blendMode = pattern->m_blendMode;
pattern = pattern->next();
if (pattern == curr || !pattern)
pattern = this;
}
}
for (curr = this; curr && curr->isOriginSet(); curr = curr->next()) { }
if (curr && curr != this) {
// We need to fill in the remaining values with the pattern specified.
for (FillLayer* pattern = this; curr; curr = curr->next()) {
curr->m_origin = pattern->m_origin;
pattern = pattern->next();
if (pattern == curr || !pattern)
pattern = this;
}
}
for (curr = this; curr && curr->isRepeatXSet(); curr = curr->next()) { }
if (curr && curr != this) {
// We need to fill in the remaining values with the pattern specified.
for (FillLayer* pattern = this; curr; curr = curr->next()) {
curr->m_repeatX = pattern->m_repeatX;
pattern = pattern->next();
if (pattern == curr || !pattern)
pattern = this;
}
}
for (curr = this; curr && curr->isRepeatYSet(); curr = curr->next()) { }
if (curr && curr != this) {
// We need to fill in the remaining values with the pattern specified.
for (FillLayer* pattern = this; curr; curr = curr->next()) {
curr->m_repeatY = pattern->m_repeatY;
pattern = pattern->next();
if (pattern == curr || !pattern)
pattern = this;
}
}
for (curr = this; curr && curr->isSizeSet(); curr = curr->next()) { }
if (curr && curr != this) {
// We need to fill in the remaining values with the pattern specified.
for (FillLayer* pattern = this; curr; curr = curr->next()) {
curr->m_sizeType = pattern->m_sizeType;
curr->m_sizeLength = pattern->m_sizeLength;
pattern = pattern->next();
if (pattern == curr || !pattern)
pattern = this;
}
}
}
void FillLayer::cullEmptyLayers()
{
for (FillLayer* layer = this; layer; layer = layer->m_next.get()) {
if (layer->m_next && !layer->m_next->isImageSet()) {
layer->m_next = nullptr;
break;
}
}
}
static inline EFillBox clipMax(EFillBox clipA, EFillBox clipB)
{
if (clipA == BorderFillBox || clipB == BorderFillBox)
return BorderFillBox;
if (clipA == PaddingFillBox || clipB == PaddingFillBox)
return PaddingFillBox;
if (clipA == ContentFillBox || clipB == ContentFillBox)
return ContentFillBox;
return TextFillBox;
}
void FillLayer::computeClipMax() const
{
Vector<const FillLayer*, 4> layers;
for (auto* layer = this; layer; layer = layer->m_next.get())
layers.append(layer);
EFillBox computedClipMax = TextFillBox;
for (unsigned i = layers.size(); i; --i) {
auto& layer = *layers[i - 1];
computedClipMax = clipMax(computedClipMax, layer.clip());
layer.m_clipMax = computedClipMax;
}
}
bool FillLayer::clipOccludesNextLayers(bool firstLayer) const
{
if (firstLayer)
computeClipMax();
return m_clip == m_clipMax;
}
bool FillLayer::containsImage(StyleImage& image) const
{
for (auto* layer = this; layer; layer = layer->m_next.get()) {
if (layer->m_image && image == *layer->m_image)
return true;
}
return false;
}
bool FillLayer::imagesAreLoaded() const
{
for (auto* layer = this; layer; layer = layer->m_next.get()) {
if (layer->m_image && !layer->m_image->isLoaded())
return false;
}
return true;
}
bool FillLayer::hasOpaqueImage(const RenderElement& renderer) const
{
if (!m_image)
return false;
if (m_composite == CompositeClear || m_composite == CompositeCopy)
return true;
return m_blendMode == BlendModeNormal && m_composite == CompositeSourceOver && m_image->knownToBeOpaque(&renderer);
}
bool FillLayer::hasRepeatXY() const
{
return m_repeatX == RepeatFill && m_repeatY == RepeatFill;
}
bool FillLayer::hasImage() const
{
for (auto* layer = this; layer; layer = layer->m_next.get()) {
if (layer->image())
return true;
}
return false;
}
bool FillLayer::hasFixedImage() const
{
for (auto* layer = this; layer; layer = layer->m_next.get()) {
if (layer->m_image && layer->m_attachment == FixedBackgroundAttachment)
return true;
}
return false;
}
bool FillLayer::imagesIdentical(const FillLayer* layer1, const FillLayer* layer2)
{
for (; layer1 && layer2; layer1 = layer1->next(), layer2 = layer2->next()) {
if (!arePointingToEqualData(layer1->image(), layer2->image()))
return false;
}
return !layer1 && !layer2;
}
TextStream& operator<<(TextStream& ts, FillSize fillSize)
{
return ts << fillSize.type << " " << fillSize.size;
}
TextStream& operator<<(TextStream& ts, const FillLayer& layer)
{
TextStream::GroupScope scope(ts);
ts << "fill-layer";
ts.startGroup();
ts << "position " << layer.xPosition() << " " << layer.yPosition();
ts.endGroup();
ts.dumpProperty("size", layer.size());
ts.startGroup();
ts << "background-origin " << layer.backgroundXOrigin() << " " << layer.backgroundYOrigin();
ts.endGroup();
ts.startGroup();
ts << "repeat " << layer.repeatX() << " " << layer.repeatY();
ts.endGroup();
ts.dumpProperty("clip", layer.clip());
ts.dumpProperty("origin", layer.origin());
ts.dumpProperty("composite", layer.composite());
ts.dumpProperty("blend-mode", layer.blendMode());
ts.dumpProperty("mask-type", layer.maskSourceType());
if (layer.next())
ts << *layer.next();
return ts;
}
} // namespace WebCore