--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/style/RenderStyle.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,1108 @@
+/*
+ * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 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 "RenderStyle.h"
+
+#include "CSSPropertyNames.h"
+#include "CSSStyleSelector.h"
+#include "CachedImage.h"
+#include "CounterContent.h"
+#include "FontSelector.h"
+#include "RenderArena.h"
+#include "RenderObject.h"
+#include "StyleImage.h"
+#include <wtf/StdLibExtras.h>
+#include <algorithm>
+
+using namespace std;
+
+namespace WebCore {
+
+inline RenderStyle* defaultStyle()
+{
+ static RenderStyle* s_defaultStyle = RenderStyle::createDefaultStyle().releaseRef();
+ return s_defaultStyle;
+}
+
+PassRefPtr<RenderStyle> RenderStyle::create()
+{
+ return adoptRef(new RenderStyle());
+}
+
+PassRefPtr<RenderStyle> RenderStyle::createDefaultStyle()
+{
+ return adoptRef(new RenderStyle(true));
+}
+
+PassRefPtr<RenderStyle> RenderStyle::clone(const RenderStyle* other)
+{
+ return adoptRef(new RenderStyle(*other));
+}
+
+ALWAYS_INLINE RenderStyle::RenderStyle()
+ : m_affectedByAttributeSelectors(false)
+ , m_unique(false)
+ , m_affectedByEmpty(false)
+ , m_emptyState(false)
+ , m_childrenAffectedByFirstChildRules(false)
+ , m_childrenAffectedByLastChildRules(false)
+ , m_childrenAffectedByDirectAdjacentRules(false)
+ , m_childrenAffectedByForwardPositionalRules(false)
+ , m_childrenAffectedByBackwardPositionalRules(false)
+ , m_firstChildState(false)
+ , m_lastChildState(false)
+ , m_childIndex(0)
+ , m_box(defaultStyle()->m_box)
+ , visual(defaultStyle()->visual)
+ , m_background(defaultStyle()->m_background)
+ , surround(defaultStyle()->surround)
+ , rareNonInheritedData(defaultStyle()->rareNonInheritedData)
+ , rareInheritedData(defaultStyle()->rareInheritedData)
+ , inherited(defaultStyle()->inherited)
+#if ENABLE(SVG)
+ , m_svgStyle(defaultStyle()->m_svgStyle)
+#endif
+{
+ setBitDefaults(); // Would it be faster to copy this from the default style?
+}
+
+ALWAYS_INLINE RenderStyle::RenderStyle(bool)
+ : m_affectedByAttributeSelectors(false)
+ , m_unique(false)
+ , m_affectedByEmpty(false)
+ , m_emptyState(false)
+ , m_childrenAffectedByFirstChildRules(false)
+ , m_childrenAffectedByLastChildRules(false)
+ , m_childrenAffectedByDirectAdjacentRules(false)
+ , m_childrenAffectedByForwardPositionalRules(false)
+ , m_childrenAffectedByBackwardPositionalRules(false)
+ , m_firstChildState(false)
+ , m_lastChildState(false)
+ , m_childIndex(0)
+{
+ setBitDefaults();
+
+ m_box.init();
+ visual.init();
+ m_background.init();
+ surround.init();
+ rareNonInheritedData.init();
+ rareNonInheritedData.access()->flexibleBox.init();
+ rareNonInheritedData.access()->marquee.init();
+ rareNonInheritedData.access()->m_multiCol.init();
+ rareNonInheritedData.access()->m_transform.init();
+ rareInheritedData.init();
+ inherited.init();
+
+#if ENABLE(SVG)
+ m_svgStyle.init();
+#endif
+}
+
+ALWAYS_INLINE RenderStyle::RenderStyle(const RenderStyle& o)
+ : RefCounted<RenderStyle>()
+ , m_affectedByAttributeSelectors(false)
+ , m_unique(false)
+ , m_affectedByEmpty(false)
+ , m_emptyState(false)
+ , m_childrenAffectedByFirstChildRules(false)
+ , m_childrenAffectedByLastChildRules(false)
+ , m_childrenAffectedByDirectAdjacentRules(false)
+ , m_childrenAffectedByForwardPositionalRules(false)
+ , m_childrenAffectedByBackwardPositionalRules(false)
+ , m_firstChildState(false)
+ , m_lastChildState(false)
+ , m_childIndex(0)
+ , m_box(o.m_box)
+ , visual(o.visual)
+ , m_background(o.m_background)
+ , surround(o.surround)
+ , rareNonInheritedData(o.rareNonInheritedData)
+ , rareInheritedData(o.rareInheritedData)
+ , inherited(o.inherited)
+#if ENABLE(SVG)
+ , m_svgStyle(o.m_svgStyle)
+#endif
+ , inherited_flags(o.inherited_flags)
+ , noninherited_flags(o.noninherited_flags)
+{
+}
+
+void RenderStyle::inheritFrom(const RenderStyle* inheritParent)
+{
+ rareInheritedData = inheritParent->rareInheritedData;
+ inherited = inheritParent->inherited;
+ inherited_flags = inheritParent->inherited_flags;
+#if ENABLE(SVG)
+ if (m_svgStyle != inheritParent->m_svgStyle)
+ m_svgStyle.access()->inheritFrom(inheritParent->m_svgStyle.get());
+#endif
+}
+
+RenderStyle::~RenderStyle()
+{
+}
+
+bool RenderStyle::operator==(const RenderStyle& o) const
+{
+ // compare everything except the pseudoStyle pointer
+ return inherited_flags == o.inherited_flags &&
+ noninherited_flags == o.noninherited_flags &&
+ m_box == o.m_box &&
+ visual == o.visual &&
+ m_background == o.m_background &&
+ surround == o.surround &&
+ rareNonInheritedData == o.rareNonInheritedData &&
+ rareInheritedData == o.rareInheritedData &&
+ inherited == o.inherited
+#if ENABLE(SVG)
+ && m_svgStyle == o.m_svgStyle
+#endif
+ ;
+}
+
+bool RenderStyle::isStyleAvailable() const
+{
+ return this != CSSStyleSelector::styleNotYetAvailable();
+}
+
+static inline int pseudoBit(PseudoId pseudo)
+{
+ return 1 << (pseudo - 1);
+}
+
+bool RenderStyle::hasAnyPublicPseudoStyles() const
+{
+ return PUBLIC_PSEUDOID_MASK & noninherited_flags._pseudoBits;
+}
+
+bool RenderStyle::hasPseudoStyle(PseudoId pseudo) const
+{
+ ASSERT(pseudo > NOPSEUDO);
+ ASSERT(pseudo < FIRST_INTERNAL_PSEUDOID);
+ return pseudoBit(pseudo) & noninherited_flags._pseudoBits;
+}
+
+void RenderStyle::setHasPseudoStyle(PseudoId pseudo)
+{
+ ASSERT(pseudo > NOPSEUDO);
+ ASSERT(pseudo < FIRST_INTERNAL_PSEUDOID);
+ noninherited_flags._pseudoBits |= pseudoBit(pseudo);
+}
+
+RenderStyle* RenderStyle::getCachedPseudoStyle(PseudoId pid) const
+{
+ ASSERT(styleType() != VISITED_LINK);
+
+ if (!m_cachedPseudoStyles || !m_cachedPseudoStyles->size())
+ return 0;
+
+ if (styleType() != NOPSEUDO) {
+ if (pid == VISITED_LINK)
+ return m_cachedPseudoStyles->at(0)->styleType() == VISITED_LINK ? m_cachedPseudoStyles->at(0).get() : 0;
+ return 0;
+ }
+
+ for (size_t i = 0; i < m_cachedPseudoStyles->size(); ++i) {
+ RenderStyle* pseudoStyle = m_cachedPseudoStyles->at(i).get();
+ if (pseudoStyle->styleType() == pid)
+ return pseudoStyle;
+ }
+
+ return 0;
+}
+
+RenderStyle* RenderStyle::addCachedPseudoStyle(PassRefPtr<RenderStyle> pseudo)
+{
+ if (!pseudo)
+ return 0;
+
+ RenderStyle* result = pseudo.get();
+
+ if (!m_cachedPseudoStyles)
+ m_cachedPseudoStyles.set(new PseudoStyleCache);
+
+ m_cachedPseudoStyles->append(pseudo);
+
+ return result;
+}
+
+bool RenderStyle::inheritedNotEqual(const RenderStyle* other) const
+{
+ return inherited_flags != other->inherited_flags ||
+ inherited != other->inherited ||
+#if ENABLE(SVG)
+ m_svgStyle->inheritedNotEqual(other->m_svgStyle.get()) ||
+#endif
+ rareInheritedData != other->rareInheritedData;
+}
+
+static bool positionedObjectMoved(const LengthBox& a, const LengthBox& b)
+{
+ // If any unit types are different, then we can't guarantee
+ // that this was just a movement.
+ if (a.left().type() != b.left().type() ||
+ a.right().type() != b.right().type() ||
+ a.top().type() != b.top().type() ||
+ a.bottom().type() != b.bottom().type())
+ return false;
+
+ // Only one unit can be non-auto in the horizontal direction and
+ // in the vertical direction. Otherwise the adjustment of values
+ // is changing the size of the box.
+ if (!a.left().isIntrinsicOrAuto() && !a.right().isIntrinsicOrAuto())
+ return false;
+ if (!a.top().isIntrinsicOrAuto() && !a.bottom().isIntrinsicOrAuto())
+ return false;
+
+ // One of the units is fixed or percent in both directions and stayed
+ // that way in the new style. Therefore all we are doing is moving.
+ return true;
+}
+
+/*
+ compares two styles. The result gives an idea of the action that
+ needs to be taken when replacing the old style with a new one.
+
+ CbLayout: The containing block of the object needs a relayout.
+ Layout: the RenderObject needs a relayout after the style change
+ Visible: The change is visible, but no relayout is needed
+ NonVisible: The object does need neither repaint nor relayout after
+ the change.
+
+ ### TODO:
+ A lot can be optimised here based on the display type, lots of
+ optimisations are unimplemented, and currently result in the
+ worst case result causing a relayout of the containing block.
+*/
+StyleDifference RenderStyle::diff(const RenderStyle* other, unsigned& changedContextSensitiveProperties) const
+{
+ changedContextSensitiveProperties = ContextSensitivePropertyNone;
+
+#if ENABLE(SVG)
+ if (m_svgStyle != other->m_svgStyle)
+ return m_svgStyle->diff(other->m_svgStyle.get());
+#endif
+
+ if (m_box->width() != other->m_box->width() ||
+ m_box->minWidth() != other->m_box->minWidth() ||
+ m_box->maxWidth() != other->m_box->maxWidth() ||
+ m_box->height() != other->m_box->height() ||
+ m_box->minHeight() != other->m_box->minHeight() ||
+ m_box->maxHeight() != other->m_box->maxHeight())
+ return StyleDifferenceLayout;
+
+ if (m_box->verticalAlign() != other->m_box->verticalAlign() || noninherited_flags._vertical_align != other->noninherited_flags._vertical_align)
+ return StyleDifferenceLayout;
+
+ if (m_box->boxSizing() != other->m_box->boxSizing())
+ return StyleDifferenceLayout;
+
+ if (surround->margin != other->surround->margin)
+ return StyleDifferenceLayout;
+
+ if (surround->padding != other->surround->padding)
+ return StyleDifferenceLayout;
+
+ if (rareNonInheritedData.get() != other->rareNonInheritedData.get()) {
+ if (rareNonInheritedData->m_appearance != other->rareNonInheritedData->m_appearance ||
+ rareNonInheritedData->marginTopCollapse != other->rareNonInheritedData->marginTopCollapse ||
+ rareNonInheritedData->marginBottomCollapse != other->rareNonInheritedData->marginBottomCollapse ||
+ rareNonInheritedData->lineClamp != other->rareNonInheritedData->lineClamp ||
+ rareNonInheritedData->textOverflow != other->rareNonInheritedData->textOverflow)
+ return StyleDifferenceLayout;
+
+ if (rareNonInheritedData->flexibleBox.get() != other->rareNonInheritedData->flexibleBox.get() &&
+ *rareNonInheritedData->flexibleBox.get() != *other->rareNonInheritedData->flexibleBox.get())
+ return StyleDifferenceLayout;
+
+ // FIXME: We should add an optimized form of layout that just recomputes visual overflow.
+ if (!rareNonInheritedData->shadowDataEquivalent(*other->rareNonInheritedData.get()))
+ return StyleDifferenceLayout;
+
+ if (!rareNonInheritedData->reflectionDataEquivalent(*other->rareNonInheritedData.get()))
+ return StyleDifferenceLayout;
+
+ if (rareNonInheritedData->m_multiCol.get() != other->rareNonInheritedData->m_multiCol.get() &&
+ *rareNonInheritedData->m_multiCol.get() != *other->rareNonInheritedData->m_multiCol.get())
+ return StyleDifferenceLayout;
+
+ if (rareNonInheritedData->m_transform.get() != other->rareNonInheritedData->m_transform.get() &&
+ *rareNonInheritedData->m_transform.get() != *other->rareNonInheritedData->m_transform.get()) {
+#if USE(ACCELERATED_COMPOSITING)
+ changedContextSensitiveProperties |= ContextSensitivePropertyTransform;
+ // Don't return; keep looking for another change
+#else
+ return StyleDifferenceLayout;
+#endif
+ }
+
+#if !USE(ACCELERATED_COMPOSITING)
+ if (rareNonInheritedData.get() != other->rareNonInheritedData.get()) {
+ if (rareNonInheritedData->m_transformStyle3D != other->rareNonInheritedData->m_transformStyle3D ||
+ rareNonInheritedData->m_backfaceVisibility != other->rareNonInheritedData->m_backfaceVisibility ||
+ rareNonInheritedData->m_perspective != other->rareNonInheritedData->m_perspective ||
+ rareNonInheritedData->m_perspectiveOriginX != other->rareNonInheritedData->m_perspectiveOriginX ||
+ rareNonInheritedData->m_perspectiveOriginY != other->rareNonInheritedData->m_perspectiveOriginY)
+ return StyleDifferenceLayout;
+ }
+#endif
+
+#if ENABLE(DASHBOARD_SUPPORT)
+ // If regions change, trigger a relayout to re-calc regions.
+ if (rareNonInheritedData->m_dashboardRegions != other->rareNonInheritedData->m_dashboardRegions)
+ return StyleDifferenceLayout;
+#endif
+ }
+
+ if (rareInheritedData.get() != other->rareInheritedData.get()) {
+ if (rareInheritedData->highlight != other->rareInheritedData->highlight ||
+ rareInheritedData->indent != other->rareInheritedData->indent ||
+ rareInheritedData->m_effectiveZoom != other->rareInheritedData->m_effectiveZoom ||
+ rareInheritedData->textSizeAdjust != other->rareInheritedData->textSizeAdjust ||
+ rareInheritedData->wordBreak != other->rareInheritedData->wordBreak ||
+ rareInheritedData->wordWrap != other->rareInheritedData->wordWrap ||
+ rareInheritedData->nbspMode != other->rareInheritedData->nbspMode ||
+ rareInheritedData->khtmlLineBreak != other->rareInheritedData->khtmlLineBreak ||
+ rareInheritedData->textSecurity != other->rareInheritedData->textSecurity ||
+ rareInheritedData->hyphens != other->rareInheritedData->hyphens ||
+ rareInheritedData->hyphenateCharacter != other->rareInheritedData->hyphenateCharacter)
+ return StyleDifferenceLayout;
+
+ if (!rareInheritedData->shadowDataEquivalent(*other->rareInheritedData.get()))
+ return StyleDifferenceLayout;
+
+ if (textStrokeWidth() != other->textStrokeWidth())
+ return StyleDifferenceLayout;
+ }
+
+ if (inherited->line_height != other->inherited->line_height ||
+ inherited->list_style_image != other->inherited->list_style_image ||
+ inherited->font != other->inherited->font ||
+ inherited->horizontal_border_spacing != other->inherited->horizontal_border_spacing ||
+ inherited->vertical_border_spacing != other->inherited->vertical_border_spacing ||
+ inherited_flags._box_direction != other->inherited_flags._box_direction ||
+ inherited_flags._visuallyOrdered != other->inherited_flags._visuallyOrdered ||
+ inherited_flags._htmlHacks != other->inherited_flags._htmlHacks ||
+ noninherited_flags._position != other->noninherited_flags._position ||
+ noninherited_flags._floating != other->noninherited_flags._floating ||
+ noninherited_flags._originalDisplay != other->noninherited_flags._originalDisplay)
+ return StyleDifferenceLayout;
+
+
+ if (((int)noninherited_flags._effectiveDisplay) >= TABLE) {
+ if (inherited_flags._border_collapse != other->inherited_flags._border_collapse ||
+ inherited_flags._empty_cells != other->inherited_flags._empty_cells ||
+ inherited_flags._caption_side != other->inherited_flags._caption_side ||
+ noninherited_flags._table_layout != other->noninherited_flags._table_layout)
+ return StyleDifferenceLayout;
+
+ // In the collapsing border model, 'hidden' suppresses other borders, while 'none'
+ // does not, so these style differences can be width differences.
+ if (inherited_flags._border_collapse &&
+ ((borderTopStyle() == BHIDDEN && other->borderTopStyle() == BNONE) ||
+ (borderTopStyle() == BNONE && other->borderTopStyle() == BHIDDEN) ||
+ (borderBottomStyle() == BHIDDEN && other->borderBottomStyle() == BNONE) ||
+ (borderBottomStyle() == BNONE && other->borderBottomStyle() == BHIDDEN) ||
+ (borderLeftStyle() == BHIDDEN && other->borderLeftStyle() == BNONE) ||
+ (borderLeftStyle() == BNONE && other->borderLeftStyle() == BHIDDEN) ||
+ (borderRightStyle() == BHIDDEN && other->borderRightStyle() == BNONE) ||
+ (borderRightStyle() == BNONE && other->borderRightStyle() == BHIDDEN)))
+ return StyleDifferenceLayout;
+ }
+
+ if (noninherited_flags._effectiveDisplay == LIST_ITEM) {
+ if (inherited_flags._list_style_type != other->inherited_flags._list_style_type ||
+ inherited_flags._list_style_position != other->inherited_flags._list_style_position)
+ return StyleDifferenceLayout;
+ }
+
+ if (inherited_flags._text_align != other->inherited_flags._text_align ||
+ inherited_flags._text_transform != other->inherited_flags._text_transform ||
+ inherited_flags._direction != other->inherited_flags._direction ||
+ inherited_flags._white_space != other->inherited_flags._white_space ||
+ noninherited_flags._clear != other->noninherited_flags._clear)
+ return StyleDifferenceLayout;
+
+ // Overflow returns a layout hint.
+ if (noninherited_flags._overflowX != other->noninherited_flags._overflowX ||
+ noninherited_flags._overflowY != other->noninherited_flags._overflowY)
+ return StyleDifferenceLayout;
+
+ // If our border widths change, then we need to layout. Other changes to borders
+ // only necessitate a repaint.
+ if (borderLeftWidth() != other->borderLeftWidth() ||
+ borderTopWidth() != other->borderTopWidth() ||
+ borderBottomWidth() != other->borderBottomWidth() ||
+ borderRightWidth() != other->borderRightWidth())
+ return StyleDifferenceLayout;
+
+ // If the counter directives change, trigger a relayout to re-calculate counter values and rebuild the counter node tree.
+ const CounterDirectiveMap* mapA = rareNonInheritedData->m_counterDirectives.get();
+ const CounterDirectiveMap* mapB = other->rareNonInheritedData->m_counterDirectives.get();
+ if (!(mapA == mapB || (mapA && mapB && *mapA == *mapB)))
+ return StyleDifferenceLayout;
+ if (rareNonInheritedData->m_counterIncrement != other->rareNonInheritedData->m_counterIncrement ||
+ rareNonInheritedData->m_counterReset != other->rareNonInheritedData->m_counterReset)
+ return StyleDifferenceLayout;
+
+ if ((rareNonInheritedData->opacity == 1 && other->rareNonInheritedData->opacity < 1) ||
+ (rareNonInheritedData->opacity < 1 && other->rareNonInheritedData->opacity == 1)) {
+ // FIXME: We should add an optimized form of layout that just recomputes visual overflow.
+ return StyleDifferenceLayout;
+ }
+
+ // Make sure these left/top/right/bottom checks stay below all layout checks and above
+ // all visible checks.
+ if (position() != StaticPosition) {
+ if (surround->offset != other->surround->offset) {
+ // Optimize for the case where a positioned layer is moving but not changing size.
+ if (position() == AbsolutePosition && positionedObjectMoved(surround->offset, other->surround->offset))
+ return StyleDifferenceLayoutPositionedMovementOnly;
+
+ // FIXME: We will need to do a bit of work in RenderObject/Box::setStyle before we
+ // can stop doing a layout when relative positioned objects move. In particular, we'll need
+ // to update scrolling positions and figure out how to do a repaint properly of the updated layer.
+ //if (other->position() == RelativePosition)
+ // return RepaintLayer;
+ //else
+ return StyleDifferenceLayout;
+ } else if (m_box->zIndex() != other->m_box->zIndex() || m_box->hasAutoZIndex() != other->m_box->hasAutoZIndex() ||
+ visual->clip != other->visual->clip || visual->hasClip != other->visual->hasClip)
+ return StyleDifferenceRepaintLayer;
+ }
+
+ if (rareNonInheritedData->opacity != other->rareNonInheritedData->opacity) {
+#if USE(ACCELERATED_COMPOSITING)
+ changedContextSensitiveProperties |= ContextSensitivePropertyOpacity;
+ // Don't return; keep looking for another change.
+#else
+ return StyleDifferenceRepaintLayer;
+#endif
+ }
+
+ if (rareNonInheritedData->m_mask != other->rareNonInheritedData->m_mask ||
+ rareNonInheritedData->m_maskBoxImage != other->rareNonInheritedData->m_maskBoxImage)
+ return StyleDifferenceRepaintLayer;
+
+ if (inherited->color != other->inherited->color ||
+ inherited_flags._visibility != other->inherited_flags._visibility ||
+ inherited_flags._text_decorations != other->inherited_flags._text_decorations ||
+ inherited_flags._force_backgrounds_to_white != other->inherited_flags._force_backgrounds_to_white ||
+ inherited_flags._insideLink != other->inherited_flags._insideLink ||
+ surround->border != other->surround->border ||
+ *m_background.get() != *other->m_background.get() ||
+ visual->textDecoration != other->visual->textDecoration ||
+ rareInheritedData->userModify != other->rareInheritedData->userModify ||
+ rareInheritedData->userSelect != other->rareInheritedData->userSelect ||
+ rareNonInheritedData->userDrag != other->rareNonInheritedData->userDrag ||
+ rareNonInheritedData->m_borderFit != other->rareNonInheritedData->m_borderFit ||
+ rareInheritedData->textFillColor != other->rareInheritedData->textFillColor ||
+ rareInheritedData->textStrokeColor != other->rareInheritedData->textStrokeColor)
+ return StyleDifferenceRepaint;
+
+#if USE(ACCELERATED_COMPOSITING)
+ if (rareNonInheritedData.get() != other->rareNonInheritedData.get()) {
+ if (rareNonInheritedData->m_transformStyle3D != other->rareNonInheritedData->m_transformStyle3D ||
+ rareNonInheritedData->m_backfaceVisibility != other->rareNonInheritedData->m_backfaceVisibility ||
+ rareNonInheritedData->m_perspective != other->rareNonInheritedData->m_perspective ||
+ rareNonInheritedData->m_perspectiveOriginX != other->rareNonInheritedData->m_perspectiveOriginX ||
+ rareNonInheritedData->m_perspectiveOriginY != other->rareNonInheritedData->m_perspectiveOriginY)
+ return StyleDifferenceRecompositeLayer;
+ }
+#endif
+
+ // Cursors are not checked, since they will be set appropriately in response to mouse events,
+ // so they don't need to cause any repaint or layout.
+
+ // Animations don't need to be checked either. We always set the new style on the RenderObject, so we will get a chance to fire off
+ // the resulting transition properly.
+ return StyleDifferenceEqual;
+}
+
+void RenderStyle::setClip(Length top, Length right, Length bottom, Length left)
+{
+ StyleVisualData* data = visual.access();
+ data->clip.m_top = top;
+ data->clip.m_right = right;
+ data->clip.m_bottom = bottom;
+ data->clip.m_left = left;
+}
+
+void RenderStyle::addCursor(CachedImage* image, const IntPoint& hotSpot)
+{
+ if (!rareInheritedData.access()->cursorData)
+ rareInheritedData.access()->cursorData = CursorList::create();
+ rareInheritedData.access()->cursorData->append(CursorData(image, hotSpot));
+}
+
+void RenderStyle::setCursorList(PassRefPtr<CursorList> other)
+{
+ rareInheritedData.access()->cursorData = other;
+}
+
+void RenderStyle::clearCursorList()
+{
+ if (rareInheritedData->cursorData)
+ rareInheritedData.access()->cursorData = 0;
+}
+
+void RenderStyle::clearContent()
+{
+ if (rareNonInheritedData->m_content)
+ rareNonInheritedData->m_content->clear();
+}
+
+void RenderStyle::setContent(PassRefPtr<StyleImage> image, bool add)
+{
+ if (!image)
+ return; // The object is null. Nothing to do. Just bail.
+
+ OwnPtr<ContentData>& content = rareNonInheritedData.access()->m_content;
+ ContentData* lastContent = content.get();
+ while (lastContent && lastContent->next())
+ lastContent = lastContent->next();
+
+ bool reuseContent = !add;
+ ContentData* newContentData;
+ if (reuseContent && content) {
+ content->clear();
+ newContentData = content.leakPtr();
+ } else
+ newContentData = new ContentData;
+
+ if (lastContent && !reuseContent)
+ lastContent->setNext(newContentData);
+ else
+ content.set(newContentData);
+
+ newContentData->setImage(image);
+}
+
+void RenderStyle::setContent(PassRefPtr<StringImpl> s, bool add)
+{
+ if (!s)
+ return; // The string is null. Nothing to do. Just bail.
+
+ OwnPtr<ContentData>& content = rareNonInheritedData.access()->m_content;
+ ContentData* lastContent = content.get();
+ while (lastContent && lastContent->next())
+ lastContent = lastContent->next();
+
+ bool reuseContent = !add;
+ if (add && lastContent) {
+ if (lastContent->isText()) {
+ // We can augment the existing string and share this ContentData node.
+ String newStr = lastContent->text();
+ newStr.append(s.get());
+ lastContent->setText(newStr.impl());
+ return;
+ }
+ }
+
+ ContentData* newContentData = 0;
+ if (reuseContent && content) {
+ content->clear();
+ newContentData = content.leakPtr();
+ } else
+ newContentData = new ContentData;
+
+ if (lastContent && !reuseContent)
+ lastContent->setNext(newContentData);
+ else
+ content.set(newContentData);
+
+ newContentData->setText(s);
+}
+
+void RenderStyle::setContent(CounterContent* c, bool add)
+{
+ if (!c)
+ return;
+
+ OwnPtr<ContentData>& content = rareNonInheritedData.access()->m_content;
+ ContentData* lastContent = content.get();
+ while (lastContent && lastContent->next())
+ lastContent = lastContent->next();
+
+ bool reuseContent = !add;
+ ContentData* newContentData = 0;
+ if (reuseContent && content) {
+ content->clear();
+ newContentData = content.leakPtr();
+ } else
+ newContentData = new ContentData;
+
+ if (lastContent && !reuseContent)
+ lastContent->setNext(newContentData);
+ else
+ content.set(newContentData);
+
+ newContentData->setCounter(c);
+}
+
+void RenderStyle::applyTransform(TransformationMatrix& transform, const IntSize& borderBoxSize, ApplyTransformOrigin applyOrigin) const
+{
+ // transform-origin brackets the transform with translate operations.
+ // Optimize for the case where the only transform is a translation, since the transform-origin is irrelevant
+ // in that case.
+ bool applyTransformOrigin = false;
+ unsigned s = rareNonInheritedData->m_transform->m_operations.operations().size();
+ unsigned i;
+ if (applyOrigin == IncludeTransformOrigin) {
+ for (i = 0; i < s; i++) {
+ TransformOperation::OperationType type = rareNonInheritedData->m_transform->m_operations.operations()[i]->getOperationType();
+ if (type != TransformOperation::TRANSLATE_X &&
+ type != TransformOperation::TRANSLATE_Y &&
+ type != TransformOperation::TRANSLATE &&
+ type != TransformOperation::TRANSLATE_Z &&
+ type != TransformOperation::TRANSLATE_3D
+ ) {
+ applyTransformOrigin = true;
+ break;
+ }
+ }
+ }
+
+ if (applyTransformOrigin) {
+ transform.translate3d(transformOriginX().calcFloatValue(borderBoxSize.width()), transformOriginY().calcFloatValue(borderBoxSize.height()), transformOriginZ());
+ }
+
+ for (i = 0; i < s; i++)
+ rareNonInheritedData->m_transform->m_operations.operations()[i]->apply(transform, borderBoxSize);
+
+ if (applyTransformOrigin) {
+ transform.translate3d(-transformOriginX().calcFloatValue(borderBoxSize.width()), -transformOriginY().calcFloatValue(borderBoxSize.height()), -transformOriginZ());
+ }
+}
+
+#if ENABLE(XBL)
+void RenderStyle::addBindingURI(StringImpl* uri)
+{
+ BindingURI* binding = new BindingURI(uri);
+ if (!bindingURIs())
+ SET_VAR(rareNonInheritedData, bindingURI, binding)
+ else
+ for (BindingURI* b = bindingURIs(); b; b = b->next()) {
+ if (!b->next())
+ b->setNext(binding);
+ }
+}
+#endif
+
+void RenderStyle::setTextShadow(ShadowData* val, bool add)
+{
+ ASSERT(!val || (!val->spread() && val->style() == Normal));
+
+ StyleRareInheritedData* rareData = rareInheritedData.access();
+ if (!add) {
+ delete rareData->textShadow;
+ rareData->textShadow = val;
+ return;
+ }
+
+ val->setNext(rareData->textShadow);
+ rareData->textShadow = val;
+}
+
+void RenderStyle::setBoxShadow(ShadowData* shadowData, bool add)
+{
+ StyleRareNonInheritedData* rareData = rareNonInheritedData.access();
+ if (!add) {
+ rareData->m_boxShadow.set(shadowData);
+ return;
+ }
+
+ shadowData->setNext(rareData->m_boxShadow.leakPtr());
+ rareData->m_boxShadow.set(shadowData);
+}
+
+static void constrainCornerRadiiForRect(const IntRect& r, IntSize& topLeft, IntSize& topRight, IntSize& bottomLeft, IntSize& bottomRight)
+{
+ // Constrain corner radii using CSS3 rules:
+ // http://www.w3.org/TR/css3-background/#the-border-radius
+
+ float factor = 1;
+ unsigned radiiSum;
+
+ // top
+ radiiSum = static_cast<unsigned>(topLeft.width()) + static_cast<unsigned>(topRight.width()); // Casts to avoid integer overflow.
+ if (radiiSum > static_cast<unsigned>(r.width()))
+ factor = min(static_cast<float>(r.width()) / radiiSum, factor);
+
+ // bottom
+ radiiSum = static_cast<unsigned>(bottomLeft.width()) + static_cast<unsigned>(bottomRight.width());
+ if (radiiSum > static_cast<unsigned>(r.width()))
+ factor = min(static_cast<float>(r.width()) / radiiSum, factor);
+
+ // left
+ radiiSum = static_cast<unsigned>(topLeft.height()) + static_cast<unsigned>(bottomLeft.height());
+ if (radiiSum > static_cast<unsigned>(r.height()))
+ factor = min(static_cast<float>(r.height()) / radiiSum, factor);
+
+ // right
+ radiiSum = static_cast<unsigned>(topRight.height()) + static_cast<unsigned>(bottomRight.height());
+ if (radiiSum > static_cast<unsigned>(r.height()))
+ factor = min(static_cast<float>(r.height()) / radiiSum, factor);
+
+ // Scale all radii by f if necessary.
+ if (factor < 1) {
+ // If either radius on a corner becomes zero, reset both radii on that corner.
+ topLeft.scale(factor);
+ if (!topLeft.width() || !topLeft.height())
+ topLeft = IntSize();
+ topRight.scale(factor);
+ if (!topRight.width() || !topRight.height())
+ topRight = IntSize();
+ bottomLeft.scale(factor);
+ if (!bottomLeft.width() || !bottomLeft.height())
+ bottomLeft = IntSize();
+ bottomRight.scale(factor);
+ if (!bottomRight.width() || !bottomRight.height())
+ bottomRight = IntSize();
+ }
+}
+
+void RenderStyle::getBorderRadiiForRect(const IntRect& r, IntSize& topLeft, IntSize& topRight, IntSize& bottomLeft, IntSize& bottomRight) const
+{
+ topLeft = surround->border.topLeft();
+ topRight = surround->border.topRight();
+
+ bottomLeft = surround->border.bottomLeft();
+ bottomRight = surround->border.bottomRight();
+
+ constrainCornerRadiiForRect(r, topLeft, topRight, bottomLeft, bottomRight);
+}
+
+void RenderStyle::getInnerBorderRadiiForRectWithBorderWidths(const IntRect& innerRect, unsigned short topWidth, unsigned short bottomWidth, unsigned short leftWidth, unsigned short rightWidth, IntSize& innerTopLeft, IntSize& innerTopRight, IntSize& innerBottomLeft, IntSize& innerBottomRight) const
+{
+ innerTopLeft = surround->border.topLeft();
+ innerTopRight = surround->border.topRight();
+ innerBottomLeft = surround->border.bottomLeft();
+ innerBottomRight = surround->border.bottomRight();
+
+ innerTopLeft.setWidth(max(0, innerTopLeft.width() - leftWidth));
+ innerTopLeft.setHeight(max(0, innerTopLeft.height() - topWidth));
+
+ innerTopRight.setWidth(max(0, innerTopRight.width() - rightWidth));
+ innerTopRight.setHeight(max(0, innerTopRight.height() - topWidth));
+
+ innerBottomLeft.setWidth(max(0, innerBottomLeft.width() - leftWidth));
+ innerBottomLeft.setHeight(max(0, innerBottomLeft.height() - bottomWidth));
+
+ innerBottomRight.setWidth(max(0, innerBottomRight.width() - rightWidth));
+ innerBottomRight.setHeight(max(0, innerBottomRight.height() - bottomWidth));
+
+ constrainCornerRadiiForRect(innerRect, innerTopLeft, innerTopRight, innerBottomLeft, innerBottomRight);
+}
+
+const CounterDirectiveMap* RenderStyle::counterDirectives() const
+{
+ return rareNonInheritedData->m_counterDirectives.get();
+}
+
+CounterDirectiveMap& RenderStyle::accessCounterDirectives()
+{
+ OwnPtr<CounterDirectiveMap>& map = rareNonInheritedData.access()->m_counterDirectives;
+ if (!map)
+ map.set(new CounterDirectiveMap);
+ return *map.get();
+}
+
+const AtomicString& RenderStyle::hyphenString() const
+{
+ ASSERT(hyphens() == HyphensAuto);
+
+ const AtomicString& hyphenateCharacter = rareInheritedData.get()->hyphenateCharacter;
+ if (!hyphenateCharacter.isNull())
+ return hyphenateCharacter;
+
+ // FIXME: This should depend on locale.
+ DEFINE_STATIC_LOCAL(AtomicString, hyphenMinusString, (&hyphen, 1));
+ return hyphenMinusString;
+}
+
+#if ENABLE(DASHBOARD_SUPPORT)
+const Vector<StyleDashboardRegion>& RenderStyle::initialDashboardRegions()
+{
+ DEFINE_STATIC_LOCAL(Vector<StyleDashboardRegion>, emptyList, ());
+ return emptyList;
+}
+
+const Vector<StyleDashboardRegion>& RenderStyle::noneDashboardRegions()
+{
+ DEFINE_STATIC_LOCAL(Vector<StyleDashboardRegion>, noneList, ());
+ static bool noneListInitialized = false;
+
+ if (!noneListInitialized) {
+ StyleDashboardRegion region;
+ region.label = "";
+ region.offset.m_top = Length();
+ region.offset.m_right = Length();
+ region.offset.m_bottom = Length();
+ region.offset.m_left = Length();
+ region.type = StyleDashboardRegion::None;
+ noneList.append(region);
+ noneListInitialized = true;
+ }
+ return noneList;
+}
+#endif
+
+void RenderStyle::adjustAnimations()
+{
+ AnimationList* animationList = rareNonInheritedData->m_animations.get();
+ if (!animationList)
+ return;
+
+ // Get rid of empty animations and anything beyond them
+ for (size_t i = 0; i < animationList->size(); ++i) {
+ if (animationList->animation(i)->isEmpty()) {
+ animationList->resize(i);
+ break;
+ }
+ }
+
+ if (animationList->isEmpty()) {
+ clearAnimations();
+ return;
+ }
+
+ // Repeat patterns into layers that don't have some properties set.
+ animationList->fillUnsetProperties();
+}
+
+void RenderStyle::adjustTransitions()
+{
+ AnimationList* transitionList = rareNonInheritedData->m_transitions.get();
+ if (!transitionList)
+ return;
+
+ // Get rid of empty transitions and anything beyond them
+ for (size_t i = 0; i < transitionList->size(); ++i) {
+ if (transitionList->animation(i)->isEmpty()) {
+ transitionList->resize(i);
+ break;
+ }
+ }
+
+ if (transitionList->isEmpty()) {
+ clearTransitions();
+ return;
+ }
+
+ // Repeat patterns into layers that don't have some properties set.
+ transitionList->fillUnsetProperties();
+
+ // Make sure there are no duplicate properties. This is an O(n^2) algorithm
+ // but the lists tend to be very short, so it is probably ok
+ for (size_t i = 0; i < transitionList->size(); ++i) {
+ for (size_t j = i+1; j < transitionList->size(); ++j) {
+ if (transitionList->animation(i)->property() == transitionList->animation(j)->property()) {
+ // toss i
+ transitionList->remove(i);
+ j = i;
+ }
+ }
+ }
+}
+
+AnimationList* RenderStyle::accessAnimations()
+{
+ if (!rareNonInheritedData.access()->m_animations)
+ rareNonInheritedData.access()->m_animations.set(new AnimationList());
+ return rareNonInheritedData->m_animations.get();
+}
+
+AnimationList* RenderStyle::accessTransitions()
+{
+ if (!rareNonInheritedData.access()->m_transitions)
+ rareNonInheritedData.access()->m_transitions.set(new AnimationList());
+ return rareNonInheritedData->m_transitions.get();
+}
+
+const Animation* RenderStyle::transitionForProperty(int property) const
+{
+ if (transitions()) {
+ for (size_t i = 0; i < transitions()->size(); ++i) {
+ const Animation* p = transitions()->animation(i);
+ if (p->property() == cAnimateAll || p->property() == property) {
+ return p;
+ }
+ }
+ }
+ return 0;
+}
+
+void RenderStyle::setBlendedFontSize(int size)
+{
+ FontSelector* currentFontSelector = font().fontSelector();
+ FontDescription desc(fontDescription());
+ desc.setSpecifiedSize(size);
+ desc.setComputedSize(size);
+ setFontDescription(desc);
+ font().update(currentFontSelector);
+}
+
+void RenderStyle::getBoxShadowExtent(int &top, int &right, int &bottom, int &left) const
+{
+ top = 0;
+ right = 0;
+ bottom = 0;
+ left = 0;
+
+ for (const ShadowData* boxShadow = this->boxShadow(); boxShadow; boxShadow = boxShadow->next()) {
+ if (boxShadow->style() == Inset)
+ continue;
+ int blurAndSpread = boxShadow->blur() + boxShadow->spread();
+
+ top = min(top, boxShadow->y() - blurAndSpread);
+ right = max(right, boxShadow->x() + blurAndSpread);
+ bottom = max(bottom, boxShadow->y() + blurAndSpread);
+ left = min(left, boxShadow->x() - blurAndSpread);
+ }
+}
+
+void RenderStyle::getBoxShadowHorizontalExtent(int &left, int &right) const
+{
+ left = 0;
+ right = 0;
+
+ for (const ShadowData* boxShadow = this->boxShadow(); boxShadow; boxShadow = boxShadow->next()) {
+ if (boxShadow->style() == Inset)
+ continue;
+ int blurAndSpread = boxShadow->blur() + boxShadow->spread();
+
+ left = min(left, boxShadow->x() - blurAndSpread);
+ right = max(right, boxShadow->x() + blurAndSpread);
+ }
+}
+
+void RenderStyle::getBoxShadowVerticalExtent(int &top, int &bottom) const
+{
+ top = 0;
+ bottom = 0;
+
+ for (const ShadowData* boxShadow = this->boxShadow(); boxShadow; boxShadow = boxShadow->next()) {
+ if (boxShadow->style() == Inset)
+ continue;
+ int blurAndSpread = boxShadow->blur() + boxShadow->spread();
+
+ top = min(top, boxShadow->y() - blurAndSpread);
+ bottom = max(bottom, boxShadow->y() + blurAndSpread);
+ }
+}
+
+static EBorderStyle borderStyleForColorProperty(const RenderStyle* style, int colorProperty)
+{
+ EBorderStyle borderStyle;
+ switch (colorProperty) {
+ case CSSPropertyBorderLeftColor:
+ borderStyle = style->borderLeftStyle();
+ break;
+ case CSSPropertyBorderRightColor:
+ borderStyle = style->borderRightStyle();
+ break;
+ case CSSPropertyBorderTopColor:
+ borderStyle = style->borderTopStyle();
+ break;
+ case CSSPropertyBorderBottomColor:
+ borderStyle = style->borderBottomStyle();
+ break;
+ default:
+ borderStyle = BNONE;
+ break;
+ }
+ return borderStyle;
+}
+
+const Color RenderStyle::colorIncludingFallback(int colorProperty, EBorderStyle borderStyle) const
+{
+ Color result;
+ switch (colorProperty) {
+ case CSSPropertyBackgroundColor:
+ return backgroundColor(); // Background color doesn't fall back.
+ case CSSPropertyBorderLeftColor:
+ result = borderLeftColor();
+ borderStyle = borderLeftStyle();
+ break;
+ case CSSPropertyBorderRightColor:
+ result = borderRightColor();
+ borderStyle = borderRightStyle();
+ break;
+ case CSSPropertyBorderTopColor:
+ result = borderTopColor();
+ borderStyle = borderTopStyle();
+ break;
+ case CSSPropertyBorderBottomColor:
+ result = borderBottomColor();
+ borderStyle = borderBottomStyle();
+ break;
+ case CSSPropertyColor:
+ result = color();
+ break;
+ case CSSPropertyOutlineColor:
+ result = outlineColor();
+ break;
+ case CSSPropertyWebkitColumnRuleColor:
+ result = columnRuleColor();
+ break;
+ case CSSPropertyWebkitTextFillColor:
+ result = textFillColor();
+ break;
+ case CSSPropertyWebkitTextStrokeColor:
+ result = textStrokeColor();
+ break;
+ default:
+ ASSERT_NOT_REACHED();
+ break;
+ }
+
+ if (!result.isValid()) {
+ if ((colorProperty == CSSPropertyBorderLeftColor || colorProperty == CSSPropertyBorderRightColor
+ || colorProperty == CSSPropertyBorderTopColor || colorProperty == CSSPropertyBorderBottomColor)
+ && (borderStyle == INSET || borderStyle == OUTSET || borderStyle == RIDGE || borderStyle == GROOVE))
+ result.setRGB(238, 238, 238);
+ else
+ result = color();
+ }
+
+ return result;
+}
+
+const Color RenderStyle::visitedDependentColor(int colorProperty) const
+{
+ EBorderStyle borderStyle = borderStyleForColorProperty(this, colorProperty);
+ Color unvisitedColor = colorIncludingFallback(colorProperty, borderStyle);
+ if (insideLink() != InsideVisitedLink)
+ return unvisitedColor;
+
+ RenderStyle* visitedStyle = getCachedPseudoStyle(VISITED_LINK);
+ if (!visitedStyle)
+ return unvisitedColor;
+ Color visitedColor = visitedStyle->colorIncludingFallback(colorProperty, borderStyle);
+
+ // Take the alpha from the unvisited color, but get the RGB values from the visited color.
+ return Color(visitedColor.red(), visitedColor.green(), visitedColor.blue(), unvisitedColor.alpha());
+}
+
+} // namespace WebCore