| /* |
| * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008 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 "core/style/FillLayer.h" |
| |
| #include "core/style/DataEquivalency.h" |
| |
| namespace blink { |
| |
| struct SameSizeAsFillLayer { |
| FillLayer* m_next; |
| |
| RefPtrWillBePersistent<StyleImage> m_image; |
| |
| Length m_xPosition; |
| Length m_yPosition; |
| |
| LengthSize m_sizeLength; |
| |
| unsigned m_bitfields1; |
| unsigned m_bitfields2; |
| }; |
| |
| static_assert(sizeof(FillLayer) == sizeof(SameSizeAsFillLayer), "FillLayer should stay small"); |
| |
| FillLayer::FillLayer(EFillLayerType type, bool useInitialValues) |
| : m_next(0) |
| , m_image(FillLayer::initialFillImage(type)) |
| , m_xPosition(FillLayer::initialFillXPosition(type)) |
| , m_yPosition(FillLayer::initialFillYPosition(type)) |
| , m_sizeLength(FillLayer::initialFillSizeLength(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(useInitialValues ? FillLayer::initialFillSizeType(type) : SizeNone) |
| , m_blendMode(FillLayer::initialFillBlendMode(type)) |
| , m_maskSourceType(FillLayer::initialFillMaskSourceType(type)) |
| , m_backgroundXOrigin(LeftEdge) |
| , m_backgroundYOrigin(TopEdge) |
| , m_imageSet(useInitialValues) |
| , m_attachmentSet(useInitialValues) |
| , m_clipSet(useInitialValues) |
| , m_originSet(useInitialValues) |
| , m_repeatXSet(useInitialValues) |
| , m_repeatYSet(useInitialValues) |
| , m_xPosSet(useInitialValues) |
| , m_yPosSet(useInitialValues) |
| , m_backgroundXOriginSet(false) |
| , m_backgroundYOriginSet(false) |
| , m_compositeSet(useInitialValues || type == MaskFillLayer) |
| , m_blendModeSet(useInitialValues) |
| , m_maskSourceTypeSet(useInitialValues) |
| , m_type(type) |
| , m_thisOrNextLayersClipMax(0) |
| , m_thisOrNextLayersUseContentBox(0) |
| , m_thisOrNextLayersHaveLocalAttachment(0) |
| , m_cachedPropertiesComputed(false) |
| { |
| } |
| |
| FillLayer::FillLayer(const FillLayer& o) |
| : m_next(o.m_next ? new FillLayer(*o.m_next) : 0) |
| , 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_backgroundXOrigin(o.m_backgroundXOrigin) |
| , m_backgroundYOrigin(o.m_backgroundYOrigin) |
| , 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_compositeSet(o.m_compositeSet) |
| , m_blendModeSet(o.m_blendModeSet) |
| , m_maskSourceTypeSet(o.m_maskSourceTypeSet) |
| , m_type(o.m_type) |
| , m_thisOrNextLayersClipMax(0) |
| , m_thisOrNextLayersUseContentBox(0) |
| , m_thisOrNextLayersHaveLocalAttachment(0) |
| , m_cachedPropertiesComputed(false) |
| { |
| } |
| |
| FillLayer::~FillLayer() |
| { |
| delete m_next; |
| } |
| |
| FillLayer& FillLayer::operator=(const FillLayer& o) |
| { |
| if (m_next != o.m_next) { |
| delete m_next; |
| m_next = o.m_next ? new FillLayer(*o.m_next) : 0; |
| } |
| |
| 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; |
| |
| m_cachedPropertiesComputed = false; |
| |
| 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 dataEquivalent(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_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() |
| { |
| FillLayer* next; |
| for (FillLayer* p = this; p; p = next) { |
| next = p->m_next; |
| if (next && !next->isImageSet()) { |
| delete next; |
| p->m_next = 0; |
| break; |
| } |
| } |
| } |
| |
| static 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::computeCachedPropertiesIfNeeded() const |
| { |
| if (m_cachedPropertiesComputed) |
| return; |
| m_thisOrNextLayersClipMax = clip(); |
| m_thisOrNextLayersUseContentBox = clip() == ContentFillBox || origin() == ContentFillBox; |
| m_thisOrNextLayersHaveLocalAttachment = attachment() == LocalBackgroundAttachment; |
| m_cachedPropertiesComputed = true; |
| |
| if (m_next) { |
| m_next->computeCachedPropertiesIfNeeded(); |
| m_thisOrNextLayersClipMax = clipMax(thisOrNextLayersClipMax(), m_next->thisOrNextLayersClipMax()); |
| m_thisOrNextLayersUseContentBox |= m_next->m_thisOrNextLayersUseContentBox; |
| m_thisOrNextLayersHaveLocalAttachment |= m_next->m_thisOrNextLayersHaveLocalAttachment; |
| } |
| } |
| |
| bool FillLayer::clipOccludesNextLayers() const |
| { |
| return clip() == thisOrNextLayersClipMax(); |
| } |
| |
| bool FillLayer::containsImage(StyleImage* s) const |
| { |
| if (!s) |
| return false; |
| if (m_image && *s == *m_image) |
| return true; |
| if (m_next) |
| return m_next->containsImage(s); |
| return false; |
| } |
| |
| bool FillLayer::imagesAreLoaded() const |
| { |
| const FillLayer* curr; |
| for (curr = this; curr; curr = curr->next()) { |
| if (curr->m_image && !curr->m_image->isLoaded()) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool FillLayer::hasOpaqueImage(const LayoutObject* layoutObject) const |
| { |
| if (!m_image) |
| return false; |
| |
| // TODO(trchen): Should check blend mode before composite mode. |
| if (m_composite == CompositeClear || m_composite == CompositeCopy) |
| return true; |
| |
| if (m_blendMode != WebBlendModeNormal) |
| return false; |
| |
| if (m_composite == CompositeSourceOver) |
| return m_image->knownToBeOpaque(layoutObject); |
| |
| return false; |
| } |
| |
| bool FillLayer::hasRepeatXY() const |
| { |
| return m_repeatX == RepeatFill && m_repeatY == RepeatFill; |
| } |
| |
| static inline bool layerImagesIdentical(const FillLayer& layer1, const FillLayer& layer2) |
| { |
| // We just care about pointer equivalency. |
| return layer1.image() == layer2.image(); |
| } |
| |
| bool FillLayer::imagesIdentical(const FillLayer* layer1, const FillLayer* layer2) |
| { |
| for (; layer1 && layer2; layer1 = layer1->next(), layer2 = layer2->next()) { |
| if (!layerImagesIdentical(*layer1, *layer2)) |
| return false; |
| } |
| |
| return !layer1 && !layer2; |
| } |
| |
| } // namespace blink |
