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Diffstat (limited to 'khtml/rendering/render_style.cpp')
| -rw-r--r-- | khtml/rendering/render_style.cpp | 1300 |
1 files changed, 1300 insertions, 0 deletions
diff --git a/khtml/rendering/render_style.cpp b/khtml/rendering/render_style.cpp new file mode 100644 index 000000000..936964b98 --- /dev/null +++ b/khtml/rendering/render_style.cpp @@ -0,0 +1,1300 @@ +/* + * This file is part of the DOM implementation for KDE. + * + * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org) + * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org) + * Copyright (C) 2002-2003 Dirk Mueller (mueller@kde.org) + * Copyright (C) 2002-2005 Apple Computer, Inc. + * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com) + * + * 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 "xml/dom_stringimpl.h" +#include "css/cssstyleselector.h" +#include "css/css_valueimpl.h" +#include "render_style.h" + +#include "kdebug.h" + +using namespace khtml; +using namespace DOM; + +/* CSS says Fixed for the default padding value, but we treat variable as 0 padding anyways, and like + * this is works fine for table paddings aswell + */ +StyleSurroundData::StyleSurroundData() + : margin( Fixed ), padding( Variable ) +{ +} + +StyleSurroundData::StyleSurroundData(const StyleSurroundData& o ) + : Shared<StyleSurroundData>(), + offset( o.offset ), margin( o.margin ), padding( o.padding ), + border( o.border ) +{ +} + +bool StyleSurroundData::operator==(const StyleSurroundData& o) const +{ + return offset==o.offset && margin==o.margin && + padding==o.padding && border==o.border; +} + +StyleBoxData::StyleBoxData() + : z_index( 0 ), z_auto( true ) +{ + min_width = min_height = RenderStyle::initialMinSize(); + max_width = max_height = RenderStyle::initialMaxSize(); + box_sizing = RenderStyle::initialBoxSizing(); +} + +StyleBoxData::StyleBoxData(const StyleBoxData& o ) + : Shared<StyleBoxData>(), + width( o.width ), height( o.height ), + min_width( o.min_width ), max_width( o.max_width ), + min_height ( o.min_height ), max_height( o.max_height ), + box_sizing( o.box_sizing), + z_index( o.z_index ), z_auto( o.z_auto ) +{ +} + +bool StyleBoxData::operator==(const StyleBoxData& o) const +{ + return + width == o.width && + height == o.height && + min_width == o.min_width && + max_width == o.max_width && + min_height == o.min_height && + max_height == o.max_height && + box_sizing == o.box_sizing && + z_index == o.z_index && + z_auto == o.z_auto; +} + +StyleVisualData::StyleVisualData() + : textDecoration(RenderStyle::initialTextDecoration()), + palette( QApplication::palette() ) +{ +} + +StyleVisualData::~StyleVisualData() { +} + +StyleVisualData::StyleVisualData(const StyleVisualData& o ) + : Shared<StyleVisualData>(), + clip( o.clip ), textDecoration(o.textDecoration), + palette( o.palette ) +{ +} + +BackgroundLayer::BackgroundLayer() +:m_image(RenderStyle::initialBackgroundImage()), + m_bgAttachment(RenderStyle::initialBackgroundAttachment()), + m_bgClip(RenderStyle::initialBackgroundClip()), + m_bgOrigin(RenderStyle::initialBackgroundOrigin()), + m_bgRepeat(RenderStyle::initialBackgroundRepeat()), + m_backgroundSize(RenderStyle::initialBackgroundSize()), + m_next(0) +{ + m_imageSet = m_attachmentSet = m_clipSet = m_originSet = + m_repeatSet = m_xPosSet = m_yPosSet = m_backgroundSizeSet = false; +} + +BackgroundLayer::BackgroundLayer(const BackgroundLayer& o) +{ + m_next = o.m_next ? new BackgroundLayer(*o.m_next) : 0; + m_image = o.m_image; + m_xPosition = o.m_xPosition; + m_yPosition = o.m_yPosition; + m_bgAttachment = o.m_bgAttachment; + m_bgClip = o.m_bgClip; + m_bgOrigin = o.m_bgOrigin; + m_bgRepeat = o.m_bgRepeat; + m_backgroundSize = o.m_backgroundSize; + m_imageSet = o.m_imageSet; + m_attachmentSet = o.m_attachmentSet; + m_clipSet = o.m_clipSet; + m_originSet = o.m_originSet; + m_repeatSet = o.m_repeatSet; + m_xPosSet = o.m_xPosSet; + m_yPosSet = o.m_yPosSet; + m_backgroundSizeSet = o.m_backgroundSizeSet; +} + +BackgroundLayer::~BackgroundLayer() +{ + delete m_next; +} + +BackgroundLayer& BackgroundLayer::operator=(const BackgroundLayer& o) { + if (m_next != o.m_next) { + delete m_next; + m_next = o.m_next ? new BackgroundLayer(*o.m_next) : 0; + } + + m_image = o.m_image; + m_xPosition = o.m_xPosition; + m_yPosition = o.m_yPosition; + m_bgAttachment = o.m_bgAttachment; + m_bgClip = o.m_bgClip; + m_bgOrigin = o.m_bgOrigin; + m_bgRepeat = o.m_bgRepeat; + m_backgroundSize = o.m_backgroundSize; + + m_imageSet = o.m_imageSet; + m_attachmentSet = o.m_attachmentSet; + m_originSet = o.m_originSet; + m_repeatSet = o.m_repeatSet; + m_xPosSet = o.m_xPosSet; + m_yPosSet = o.m_yPosSet; + m_backgroundSizeSet = o.m_backgroundSizeSet; + + return *this; +} + +bool BackgroundLayer::operator==(const BackgroundLayer& o) const { + return m_image == o.m_image && m_xPosition == o.m_xPosition && m_yPosition == o.m_yPosition && + m_bgAttachment == o.m_bgAttachment && m_bgClip == o.m_bgClip && m_bgOrigin == o.m_bgOrigin && m_bgRepeat == o.m_bgRepeat && + m_backgroundSize.width == o.m_backgroundSize.width && m_backgroundSize.height == o.m_backgroundSize.height && + m_imageSet == o.m_imageSet && m_attachmentSet == o.m_attachmentSet && m_repeatSet == o.m_repeatSet && + m_xPosSet == o.m_xPosSet && m_yPosSet == o.m_yPosSet && m_backgroundSizeSet == o.m_backgroundSizeSet && + ((m_next && o.m_next) ? *m_next == *o.m_next : m_next == o.m_next); +} + +void BackgroundLayer::fillUnsetProperties() +{ + BackgroundLayer* curr; + for (curr = this; curr && curr->isBackgroundImageSet(); curr = curr->next()); + if (curr && curr != this) { + // We need to fill in the remaining values with the pattern specified. + for (BackgroundLayer* pattern = this; curr; curr = curr->next()) { + curr->m_image = pattern->m_image; + pattern = pattern->next(); + if (pattern == curr || !pattern) + pattern = this; + } + } + + for (curr = this; curr && curr->isBackgroundXPositionSet(); curr = curr->next()); + if (curr && curr != this) { + // We need to fill in the remaining values with the pattern specified. + for (BackgroundLayer* pattern = this; curr; curr = curr->next()) { + curr->m_xPosition = pattern->m_xPosition; + pattern = pattern->next(); + if (pattern == curr || !pattern) + pattern = this; + } + } + + for (curr = this; curr && curr->isBackgroundYPositionSet(); curr = curr->next()); + if (curr && curr != this) { + // We need to fill in the remaining values with the pattern specified. + for (BackgroundLayer* pattern = this; curr; curr = curr->next()) { + curr->m_yPosition = pattern->m_yPosition; + pattern = pattern->next(); + if (pattern == curr || !pattern) + pattern = this; + } + } + + for (curr = this; curr && curr->isBackgroundAttachmentSet(); curr = curr->next()); + if (curr && curr != this) { + // We need to fill in the remaining values with the pattern specified. + for (BackgroundLayer* pattern = this; curr; curr = curr->next()) { + curr->m_bgAttachment = pattern->m_bgAttachment; + pattern = pattern->next(); + if (pattern == curr || !pattern) + pattern = this; + } + } + + for (curr = this; curr && curr->isBackgroundClipSet(); curr = curr->next()); + if (curr && curr != this) { + // We need to fill in the remaining values with the pattern specified. + for (BackgroundLayer* pattern = this; curr; curr = curr->next()) { + curr->m_bgClip = pattern->m_bgClip; + pattern = pattern->next(); + if (pattern == curr || !pattern) + pattern = this; + } + } + + for (curr = this; curr && curr->isBackgroundOriginSet(); curr = curr->next()); + if (curr && curr != this) { + // We need to fill in the remaining values with the pattern specified. + for (BackgroundLayer* pattern = this; curr; curr = curr->next()) { + curr->m_bgOrigin = pattern->m_bgOrigin; + pattern = pattern->next(); + if (pattern == curr || !pattern) + pattern = this; + } + } + + for (curr = this; curr && curr->isBackgroundRepeatSet(); curr = curr->next()); + if (curr && curr != this) { + // We need to fill in the remaining values with the pattern specified. + for (BackgroundLayer* pattern = this; curr; curr = curr->next()) { + curr->m_bgRepeat = pattern->m_bgRepeat; + pattern = pattern->next(); + if (pattern == curr || !pattern) + pattern = this; + } + } + + for (curr = this; curr && curr->isBackgroundSizeSet(); curr = curr->next()); + if (curr && curr != this) { + // We need to fill in the remaining values with the pattern specified. + for (BackgroundLayer* pattern = this; curr; curr = curr->next()) { + curr->m_backgroundSize = pattern->m_backgroundSize; + pattern = pattern->next(); + if (pattern == curr || !pattern) + pattern = this; + } + } +} + +void BackgroundLayer::cullEmptyLayers() +{ + BackgroundLayer *next; + for (BackgroundLayer *p = this; p; p = next) { + next = p->m_next; + if (next && !next->isBackgroundImageSet() && + !next->isBackgroundXPositionSet() && !next->isBackgroundYPositionSet() && + !next->isBackgroundAttachmentSet() && !next->isBackgroundClipSet() && + !next->isBackgroundOriginSet() && !next->isBackgroundRepeatSet() && + !next->isBackgroundSizeSet()) { + delete next; + p->m_next = 0; + break; + } + } +} + +StyleBackgroundData::StyleBackgroundData() +{} + +StyleBackgroundData::StyleBackgroundData(const StyleBackgroundData& o) + : Shared<StyleBackgroundData>(), m_background(o.m_background), m_outline(o.m_outline) +{} + +bool StyleBackgroundData::operator==(const StyleBackgroundData& o) const +{ + return m_background == o.m_background && m_color == o.m_color && m_outline == o.m_outline; +} + +StyleGeneratedData::StyleGeneratedData() : Shared<StyleGeneratedData>(), content(0), counter_reset(0), counter_increment(0) {} + +StyleGeneratedData::~StyleGeneratedData() +{ + if (counter_reset) counter_reset->deref(); + if (counter_increment) counter_increment->deref(); + delete content; +} + +StyleGeneratedData::StyleGeneratedData(const StyleGeneratedData& o) + : Shared<StyleGeneratedData>(), content(0), + counter_reset(o.counter_reset), counter_increment(o.counter_increment) +{ + if (o.content) content = new ContentData(*o.content); + if (counter_reset) counter_reset->ref(); + if (counter_increment) counter_increment->ref(); +} + +bool StyleGeneratedData::contentDataEquivalent(const StyleGeneratedData* otherStyle) const +{ + ContentData* c1 = content; + ContentData* c2 = otherStyle->content; + + while (c1 && c2) { + if (c1->_contentType != c2->_contentType) + return false; + if (c1->_contentType == CONTENT_TEXT) { + DOM::DOMString c1Str(c1->_content.text); + DOM::DOMString c2Str(c2->_content.text); + if (c1Str != c2Str) + return false; + } + else if (c1->_contentType == CONTENT_OBJECT) { + if (c1->_content.object != c2->_content.object) + return false; + } + else if (c1->_contentType == CONTENT_COUNTER) { + if (c1->_content.counter != c2->_content.counter) + return false; + } + else if (c1->_contentType == CONTENT_QUOTE) { + if (c1->_content.quote != c2->_content.quote) + return false; + } + + c1 = c1->_nextContent; + c2 = c2->_nextContent; + } + + return !c1 && !c2; +} + +static bool compareCounterActList(const CSSValueListImpl* ca, const CSSValueListImpl* cb) { + // weeee.... + CSSValueListImpl* a = const_cast<CSSValueListImpl*>(ca); + CSSValueListImpl* b = const_cast<CSSValueListImpl*>(cb); + + if (!a && !b) return true; + if (!a || !b) return false; + if (a->length() != b->length()) return false; + for(uint i=0; i< a->length(); i++) { + CSSValueImpl *ai = a->item(i); + CSSValueImpl *bi = b->item(i); + assert(ai && ai->cssValueType() == CSSValue::CSS_CUSTOM); + assert(bi && bi->cssValueType() == CSSValue::CSS_CUSTOM); + CounterActImpl* caa = static_cast<CounterActImpl*>(ai); + CounterActImpl* cab = static_cast<CounterActImpl*>(bi); + if (caa->value() != cab->value()) return false; + if (caa->counter() != cab->counter()) return false; + } + return true; +} + +bool StyleGeneratedData::counterDataEquivalent(const StyleGeneratedData* otherStyle) const +{ + return compareCounterActList(counter_reset, otherStyle->counter_reset) && + compareCounterActList(counter_increment, otherStyle->counter_increment); +} + +bool StyleGeneratedData::operator==(const StyleGeneratedData& o) const +{ + return contentDataEquivalent(&o) && counterDataEquivalent(&o); +} + +StyleMarqueeData::StyleMarqueeData() +{ + increment = RenderStyle::initialMarqueeIncrement(); + speed = RenderStyle::initialMarqueeSpeed(); + direction = RenderStyle::initialMarqueeDirection(); + behavior = RenderStyle::initialMarqueeBehavior(); + loops = RenderStyle::initialMarqueeLoopCount(); +} + +StyleMarqueeData::StyleMarqueeData(const StyleMarqueeData& o) +:Shared<StyleMarqueeData>(), increment(o.increment), speed(o.speed), loops(o.loops), + behavior(o.behavior), direction(o.direction) +{} + +bool StyleMarqueeData::operator==(const StyleMarqueeData& o) const +{ + return (increment == o.increment && speed == o.speed && direction == o.direction && + behavior == o.behavior && loops == o.loops); +} + +StyleCSS3NonInheritedData::StyleCSS3NonInheritedData() +:Shared<StyleCSS3NonInheritedData>() +, opacity(RenderStyle::initialOpacity()) +{ +} + +StyleCSS3NonInheritedData::StyleCSS3NonInheritedData(const StyleCSS3NonInheritedData& o) +:Shared<StyleCSS3NonInheritedData>(), + opacity(o.opacity), +#ifdef APPLE_CHANGES + flexibleBox(o.flexibleBox), +#endif + marquee(o.marquee) +{ +} + +bool StyleCSS3NonInheritedData::operator==(const StyleCSS3NonInheritedData& o) const +{ + return + opacity == o.opacity && +#ifdef APPLE_CHANGES + flexibleBox == o.flexibleBox && +#endif + marquee == o.marquee; +} + +StyleCSS3InheritedData::StyleCSS3InheritedData() +:Shared<StyleCSS3InheritedData>(), textShadow(0) +#ifdef APPLE_CHANGES +, userModify(READ_ONLY), textSizeAdjust(RenderStyle::initialTextSizeAdjust()) +#endif +{ + +} + +StyleCSS3InheritedData::StyleCSS3InheritedData(const StyleCSS3InheritedData& o) +:Shared<StyleCSS3InheritedData>() +{ + textShadow = o.textShadow ? new ShadowData(*o.textShadow) : 0; +#ifdef APPLE_CHANGES + userModify = o.userModify; + textSizeAdjust = o.textSizeAdjust; +#endif +} + +StyleCSS3InheritedData::~StyleCSS3InheritedData() +{ + delete textShadow; +} + +bool StyleCSS3InheritedData::operator==(const StyleCSS3InheritedData& o) const +{ + return shadowDataEquivalent(o) +#ifdef APPLE_CHANGES + && (userModify == o.userModify) && (textSizeAdjust == o.textSizeAdjust) +#endif + ; +} + +bool StyleCSS3InheritedData::shadowDataEquivalent(const StyleCSS3InheritedData& o) const +{ + if (!textShadow && o.textShadow || textShadow && !o.textShadow) + return false; + if (textShadow && o.textShadow && (*textShadow != *o.textShadow)) + return false; + return true; +} + +StyleInheritedData::StyleInheritedData() + : indent( RenderStyle::initialTextIndent() ), line_height( RenderStyle::initialLineHeight() ), + style_image( RenderStyle::initialListStyleImage() ), + font(), color( RenderStyle::initialColor() ), + border_hspacing( RenderStyle::initialBorderHorizontalSpacing() ), + border_vspacing( RenderStyle::initialBorderVerticalSpacing() ), + widows( RenderStyle::initialWidows() ), orphans( RenderStyle::initialOrphans() ), + quotes(0) +{ +} + +StyleInheritedData::~StyleInheritedData() +{ + if (quotes) quotes->deref(); +} + +StyleInheritedData::StyleInheritedData(const StyleInheritedData& o ) + : Shared<StyleInheritedData>(), + indent( o.indent ), line_height( o.line_height ), style_image( o.style_image ), + font( o.font ), color( o.color ), + border_hspacing( o.border_hspacing ), + border_vspacing( o.border_vspacing ), + widows(o.widows), orphans(o.orphans) +{ + quotes = o.quotes; + if (quotes) quotes->ref(); +} + +bool StyleInheritedData::operator==(const StyleInheritedData& o) const +{ + return + indent == o.indent && + line_height == o.line_height && + border_hspacing == o.border_hspacing && + border_vspacing == o.border_vspacing && + style_image == o.style_image && + font == o.font && + color == o.color && + border_hspacing == o.border_hspacing && + border_vspacing == o.border_vspacing && + quotes == o.quotes && + widows == o.widows && + orphans == o.orphans ; + + // doesn't work because structs are not packed + //return memcmp(this, &o, sizeof(*this))==0; +} + +RenderStyle::RenderStyle() +{ +// counter++; + if (!_default) + _default = new RenderStyle(true); + + box = _default->box; + visual = _default->visual; + background = _default->background; + surround = _default->surround; + generated = _default->generated; + css3NonInheritedData = _default->css3NonInheritedData; + css3InheritedData = _default->css3InheritedData; + + inherited = _default->inherited; + + setBitDefaults(); + + pseudoStyle = 0; +} + +RenderStyle::RenderStyle(bool) +{ + setBitDefaults(); + + box.init(); + visual.init(); + background.init(); + surround.init(); + generated.init(); + css3NonInheritedData.init(); +#ifdef APPLE_CHANGES // ### yet to be merged + css3NonInheritedData.access()->flexibleBox.init(); +#endif + css3NonInheritedData.access()->marquee.init(); + css3InheritedData.init(); + inherited.init(); + + pseudoStyle = 0; +} + +RenderStyle::RenderStyle(const RenderStyle& o) + : Shared<RenderStyle>(), + inherited_flags( o.inherited_flags ), noninherited_flags( o.noninherited_flags ), + box( o.box ), visual( o.visual ), background( o.background ), surround( o.surround ), generated(o.generated), + css3NonInheritedData( o.css3NonInheritedData ), css3InheritedData( o.css3InheritedData ), + inherited( o.inherited ), pseudoStyle( 0 ) +{} + +void RenderStyle::inheritFrom(const RenderStyle* inheritParent) +{ + css3InheritedData = inheritParent->css3InheritedData; + inherited = inheritParent->inherited; + inherited_flags = inheritParent->inherited_flags; + + // Simulate ":after,:before { white-space: pre-line }" + if (styleType() == AFTER || styleType() == BEFORE) + setWhiteSpace(PRE_LINE); +} + +RenderStyle::~RenderStyle() +{ + RenderStyle *ps = pseudoStyle; + RenderStyle *prev = 0; + + while (ps) { + prev = ps; + ps = ps->pseudoStyle; + // to prevent a double deletion. + // this works only because the styles below aren't really shared + // Dirk said we need another construct as soon as these are shared + prev->pseudoStyle = 0; + prev->deref(); + } +} + +bool RenderStyle::operator==(const RenderStyle& o) const +{ +// compare everything except the pseudoStyle pointer + return (inherited_flags == o.inherited_flags && + noninherited_flags == o.noninherited_flags && + box == o.box && + visual == o.visual && + background == o.background && + surround == o.surround && + generated == o.generated && + css3NonInheritedData == o.css3NonInheritedData && + css3InheritedData == o.css3InheritedData && + inherited == o.inherited); +} + +enum EPseudoBit { NO_BIT = 0x0, + FIRST_LINE_BIT = 0x1, FIRST_LETTER_BIT = 0x2, SELECTION_BIT = 0x4, + BEFORE_BIT = 0x8, AFTER_BIT = 0x10, MARKER_BIT = 0x20, + REPLACED_BIT = 0x40 + }; + +static int pseudoBit(RenderStyle::PseudoId pseudo) +{ + switch (pseudo) { + case RenderStyle::BEFORE: + return BEFORE_BIT; + case RenderStyle::AFTER: + return AFTER_BIT; + case RenderStyle::MARKER: + return MARKER_BIT; + case RenderStyle::REPLACED: + return REPLACED_BIT; + case RenderStyle::FIRST_LINE: + return FIRST_LINE_BIT; + case RenderStyle::FIRST_LETTER: + return FIRST_LETTER_BIT; + case RenderStyle::SELECTION: + return SELECTION_BIT; + default: + return NO_BIT; + } +} + +bool RenderStyle::hasPseudoStyle(PseudoId pseudo) const +{ + return (pseudoBit(pseudo) & noninherited_flags.f._pseudoBits) != 0; +} + +void RenderStyle::setHasPseudoStyle(PseudoId pseudo, bool b) +{ + if (b) + noninherited_flags.f._pseudoBits |= pseudoBit(pseudo); + else + noninherited_flags.f._pseudoBits &= ~(pseudoBit(pseudo)); +} + +RenderStyle* RenderStyle::getPseudoStyle(PseudoId pid) const +{ + if (!hasPseudoStyle(pid)) return 0; + + RenderStyle *ps = 0; + if (noninherited_flags.f._styleType==NOPSEUDO) + for (ps = pseudoStyle; ps; ps = ps->pseudoStyle) + if (ps->noninherited_flags.f._styleType==pid) + break; + return ps; +} + +RenderStyle* RenderStyle::addPseudoStyle(PseudoId pid) +{ + if (hasPseudoStyle(pid)) return getPseudoStyle(pid); + + RenderStyle *ps = 0; + + switch (pid) { + case FIRST_LETTER: // pseudo-elements (FIRST_LINE has a special handling) + case SELECTION: + case BEFORE: + case AFTER: + ps = new RenderStyle(); + break; + default: + ps = new RenderStyle(*this); // use the real copy constructor to get an identical copy + } + ps->ref(); + ps->noninherited_flags.f._styleType = pid; + ps->pseudoStyle = pseudoStyle; + + pseudoStyle = ps; + + setHasPseudoStyle(pid, true); + + return ps; +} + +void RenderStyle::removePseudoStyle(PseudoId pid) +{ + RenderStyle *ps = pseudoStyle; + RenderStyle *prev = this; + + while (ps) { + if (ps->noninherited_flags.f._styleType==pid) { + prev->pseudoStyle = ps->pseudoStyle; + ps->deref(); + return; + } + prev = ps; + ps = ps->pseudoStyle; + } + + setHasPseudoStyle(pid, false); +} + + +bool RenderStyle::inheritedNotEqual( RenderStyle *other ) const +{ + return + ( + inherited_flags != other->inherited_flags || + inherited != other->inherited || + css3InheritedData != other->css3InheritedData + ); +} + +/* + 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. +*/ +RenderStyle::Diff RenderStyle::diff( const RenderStyle *other ) const +{ + // we anyway assume they are the same +// EDisplay _display : 5; + + // NonVisible: +// ECursor _cursor_style : 4; +// EUserInput _user_input : 2; as long as :enabled is not impl'd + +// ### this needs work to know more exactly if we need a relayout +// or just a repaint + +// non-inherited attributes +// DataRef<StyleBoxData> box; +// DataRef<StyleVisualData> visual; +// DataRef<StyleSurroundData> surround; + +// inherited attributes +// DataRef<StyleInheritedData> inherited; + + if ( *box.get() != *other->box.get() || + *visual.get() != *other->visual.get() || + (*surround.get() != *other->surround.get() + && (other->position() == STATIC || other->position() != position())) || + !(inherited->indent == other->inherited->indent) || + !(inherited->line_height == other->inherited->line_height) || + !(inherited->style_image == other->inherited->style_image) || + !(inherited->font == other->inherited->font) || + !(inherited->border_hspacing == other->inherited->border_hspacing) || + !(inherited->border_vspacing == other->inherited->border_vspacing) || + !(inherited_flags.f._visuallyOrdered == other->inherited_flags.f._visuallyOrdered) || + !(inherited_flags.f._htmlHacks == other->inherited_flags.f._htmlHacks) || + !(noninherited_flags.f._textOverflow == other->noninherited_flags.f._textOverflow) ) + return CbLayout; + + // changes causing Layout changes: + +// only for tables: +// _border_collapse +// EEmptyCell _empty_cells : 2 ; +// ECaptionSide _caption_side : 2; +// ETableLayout _table_layout : 1; +// EPosition _position : 2; +// EFloat _floating : 2; + if ( ((int)noninherited_flags.f._display) >= TABLE ) { + if ( !(inherited_flags.f._empty_cells == other->inherited_flags.f._empty_cells) || + !(inherited_flags.f._caption_side == other->inherited_flags.f._caption_side) || + !(inherited_flags.f._border_collapse == other->inherited_flags.f._border_collapse) || + !(noninherited_flags.f._table_layout == other->noninherited_flags.f._table_layout) || + !(noninherited_flags.f._position == other->noninherited_flags.f._position) || + !(noninherited_flags.f._floating == other->noninherited_flags.f._floating) || + !(noninherited_flags.f._flowAroundFloats == other->noninherited_flags.f._flowAroundFloats) || + !(noninherited_flags.f._unicodeBidi == other->noninherited_flags.f._unicodeBidi) ) + return CbLayout; + } + +// only for lists: +// EListStyleType _list_style_type : 5 ; +// EListStylePosition _list_style_position :1; + if (noninherited_flags.f._display == LIST_ITEM ) { + if ( !(inherited_flags.f._list_style_type == other->inherited_flags.f._list_style_type) || + !(inherited_flags.f._list_style_position == other->inherited_flags.f._list_style_position) ) + return Layout; + } + +// ### These could be better optimised +// ETextAlign _text_align : 3; +// ETextTransform _text_transform : 4; +// EDirection _direction : 1; +// EWhiteSpace _white_space : 2; +// EClear _clear : 2; + if ( !(inherited_flags.f._text_align == other->inherited_flags.f._text_align) || + !(inherited_flags.f._text_transform == other->inherited_flags.f._text_transform) || + !(inherited_flags.f._direction == other->inherited_flags.f._direction) || + !(inherited_flags.f._white_space == other->inherited_flags.f._white_space) || + !(noninherited_flags.f._clear == other->noninherited_flags.f._clear) + ) + return Layout; + + // Overflow returns a layout hint. + if (noninherited_flags.f._overflowX != other->noninherited_flags.f._overflowX || + noninherited_flags.f._overflowY != other->noninherited_flags.f._overflowY) + return Layout; + +// only for inline: +// EVerticalAlign _vertical_align : 4; + + if ( !(noninherited_flags.f._display == INLINE) && + !(noninherited_flags.f._vertical_align == other->noninherited_flags.f._vertical_align) ) + return Layout; + + if (*surround.get() != *other->surround.get()) { + assert( other->position() != STATIC ); // this style is positioned or relatively positioned + if ( surround->hasSamePBMData(*other->surround.get()) && // padding/border/margin are identical + (other->position() == RELATIVE || + !(other->left().isVariable() && other->right().isVariable()) && // X isn't static + !(other->top().isVariable() && other->bottom().isVariable()) )) // neither is Y + // therefore only the offset is different + return Position; + return Layout; + } + + // Visible: +// EVisibility _visibility : 2; +// int _text_decorations : 4; +// DataRef<StyleBackgroundData> background; + if (inherited->color != other->inherited->color || + !(inherited_flags.f._visibility == other->inherited_flags.f._visibility) || + !(inherited_flags.f._text_decorations == other->inherited_flags.f._text_decorations) || + !(noninherited_flags.f._hasClip == other->noninherited_flags.f._hasClip) || + visual->textDecoration != other->visual->textDecoration || + *background.get() != *other->background.get() || + css3NonInheritedData->opacity != other->css3NonInheritedData->opacity || + !css3InheritedData->shadowDataEquivalent(*other->css3InheritedData.get()) + ) + return Visible; + + RenderStyle::Diff ch = Equal; + // Check for visible pseudo-changes: + if (hasPseudoStyle(FIRST_LINE) != other->hasPseudoStyle(FIRST_LINE)) + ch = Visible; + else + if (hasPseudoStyle(FIRST_LINE) && other->hasPseudoStyle(FIRST_LINE)) + ch = getPseudoStyle(FIRST_LINE)->diff(other->getPseudoStyle(FIRST_LINE)); + + if (ch != Equal) return ch; + + // Check for visible pseudo-changes: + if (hasPseudoStyle(SELECTION) != other->hasPseudoStyle(SELECTION)) + ch = Visible; + else + if (hasPseudoStyle(SELECTION) && other->hasPseudoStyle(SELECTION)) + ch = getPseudoStyle(SELECTION)->diff(other->getPseudoStyle(SELECTION)); + + return ch; +} + + +RenderStyle* RenderStyle::_default = 0; + +void RenderStyle::cleanup() +{ + delete _default; + _default = 0; +} + +void RenderStyle::setPaletteColor(QPalette::ColorGroup g, QColorGroup::ColorRole r, const QColor& c) +{ + visual.access()->palette.setColor(g,r,c); +} + +void RenderStyle::adjustBackgroundLayers() +{ + if (backgroundLayers()->next()) { + // First we cull out layers that have no properties set. + accessBackgroundLayers()->cullEmptyLayers(); + + // Next we repeat patterns into layers that don't have some properties set. + accessBackgroundLayers()->fillUnsetProperties(); + } +} + +void RenderStyle::setClip( Length top, Length right, Length bottom, Length left ) +{ + StyleVisualData *data = visual.access(); + data->clip.top = top; + data->clip.right = right; + data->clip.bottom = bottom; + data->clip.left = left; +} + +void RenderStyle::setQuotes(DOM::QuotesValueImpl* q) +{ + DOM::QuotesValueImpl *t = inherited->quotes; + inherited.access()->quotes = q; + if (q) q->ref(); + if (t) t->deref(); +} + +QString RenderStyle::openQuote(int level) const +{ + if (inherited->quotes) + return inherited->quotes->openQuote(level); + else + return "\""; // 0 is default quotes +} + +QString RenderStyle::closeQuote(int level) const +{ + if (inherited->quotes) + return inherited->quotes->closeQuote(level); + else + return "\""; // 0 is default quotes +} + +void RenderStyle::addContent(CachedObject* o) +{ + if (!o) + return; // The object is null. Nothing to do. Just bail. + + StyleGeneratedData *t_generated = generated.access(); + + ContentData* lastContent = t_generated->content; + while (lastContent && lastContent->_nextContent) + lastContent = lastContent->_nextContent; + + ContentData* newContentData = new ContentData; + + if (lastContent) + lastContent->_nextContent = newContentData; + else + t_generated->content = newContentData; + + // o->ref(); + newContentData->_content.object = o; + newContentData->_contentType = CONTENT_OBJECT; +} + +void RenderStyle::addContent(DOM::DOMStringImpl* s) +{ + if (!s) + return; // The string is null. Nothing to do. Just bail. + + StyleGeneratedData *t_generated = generated.access(); + + ContentData* lastContent = t_generated->content; + while (lastContent && lastContent->_nextContent) + lastContent = lastContent->_nextContent; + + if (lastContent) { + if (lastContent->_contentType == CONTENT_TEXT) { + // We can augment the existing string and share this ContentData node. + DOMStringImpl* oldStr = lastContent->_content.text; + DOMStringImpl* newStr = oldStr->copy(); + newStr->ref(); + oldStr->deref(); + newStr->append(s); + lastContent->_content.text = newStr; + return; + } + } + + ContentData* newContentData = new ContentData; + + if (lastContent) + lastContent->_nextContent = newContentData; + else + t_generated->content = newContentData; + + newContentData->_content.text = s; + newContentData->_content.text->ref(); + newContentData->_contentType = CONTENT_TEXT; + +} + +void RenderStyle::addContent(DOM::CounterImpl* c) +{ + if (!c) + return; + + StyleGeneratedData *t_generated = generated.access(); + + ContentData* lastContent = t_generated->content; + while (lastContent && lastContent->_nextContent) + lastContent = lastContent->_nextContent; + + ContentData* newContentData = new ContentData; + + if (lastContent) + lastContent->_nextContent = newContentData; + else + t_generated->content = newContentData; + + c->ref(); + newContentData->_content.counter = c; + newContentData->_contentType = CONTENT_COUNTER; +} + +void RenderStyle::addContent(EQuoteContent q) +{ + if (q == NO_QUOTE) + return; + + StyleGeneratedData *t_generated = generated.access(); + + ContentData* lastContent = t_generated->content; + while (lastContent && lastContent->_nextContent) + lastContent = lastContent->_nextContent; + + ContentData* newContentData = new ContentData; + + if (lastContent) + lastContent->_nextContent = newContentData; + else + t_generated->content = newContentData; + + newContentData->_content.quote = q; + newContentData->_contentType = CONTENT_QUOTE; +} + +// content: normal is the same as having no content at all +void RenderStyle::setContentNormal() { + if (generated->content != 0) { + delete generated->content; + generated.access()->content = 0; + } +} + +// content: none, add an empty content node +void RenderStyle::setContentNone() { + setContentNormal(); + generated.access()->content = new ContentData; +} + +void RenderStyle::setContentData(ContentData *data) { + if (data != generated->content) { + if (data) + generated.access()->content = new ContentData(*data); + else + generated.access()->content = 0; + } +} + +ContentData::ContentData(const ContentData& o) : _contentType(o._contentType) +{ + switch (_contentType) { + case CONTENT_OBJECT: + _content.object = o._content.object; + break; + case CONTENT_TEXT: + _content.text = o._content.text; + _content.text->ref(); + break; + case CONTENT_COUNTER: + _content.counter = o._content.counter; + _content.counter->ref(); + break; + case CONTENT_QUOTE: + _content.quote = o._content.quote; + break; + case CONTENT_NONE: + default: + break; + } + + _nextContent = o._nextContent ? new ContentData(*o._nextContent) : 0; +} + +ContentData::~ContentData() +{ + clearContent(); +} + +void ContentData::clearContent() +{ + delete _nextContent; + _nextContent = 0; + + switch (_contentType) + { + case CONTENT_OBJECT: + _content.object = 0; + break; + case CONTENT_TEXT: + _content.text->deref(); + _content.text = 0; + break; + case CONTENT_COUNTER: + _content.counter->deref(); + _content.counter = 0; + break; + case CONTENT_QUOTE: + _content.quote = NO_QUOTE; + break; + default: + ; + } +} + +void RenderStyle::setTextShadow(ShadowData* val, bool add) +{ + StyleCSS3InheritedData* css3Data = css3InheritedData.access(); + if (!add) { + delete css3Data->textShadow; + css3Data->textShadow = val; + return; + } + + ShadowData* last = css3Data->textShadow; + while (last->next) last = last->next; + last->next = val; +} + +ShadowData::ShadowData(const ShadowData& o) +:x(o.x), y(o.y), blur(o.blur), color(o.color) +{ + next = o.next ? new ShadowData(*o.next) : 0; +} + +bool ShadowData::operator==(const ShadowData& o) const +{ + if ((next && !o.next) || (!next && o.next) || + (next && o.next && *next != *o.next)) + return false; + + return x == o.x && y == o.y && blur == o.blur && color == o.color; +} + +static bool hasCounter(const DOM::DOMString& c, CSSValueListImpl *l) +{ + int len = l->length(); + for(int i=0; i<len; i++) { + CounterActImpl* ca = static_cast<CounterActImpl*>(l->item(i)); + Q_ASSERT(ca != 0); + if (ca->m_counter == c) return true; + } + return false; +} + +bool RenderStyle::hasCounterReset(const DOM::DOMString& c) const +{ + if (generated->counter_reset) + return hasCounter(c, generated->counter_reset); + else + return false; +} + +bool RenderStyle::hasCounterIncrement(const DOM::DOMString& c) const +{ + if (generated->counter_increment) + return hasCounter(c, generated->counter_increment); + else + return false; +} + +static short readCounter(const DOM::DOMString& c, CSSValueListImpl *l) +{ + int len = l->length(); + for(int i=0; i<len; i++) { + CounterActImpl* ca = static_cast<CounterActImpl*>(l->item(i)); + Q_ASSERT(ca != 0); + if (ca->m_counter == c) return ca->m_value; + } + return 0; +} + +short RenderStyle::counterReset(const DOM::DOMString& c) const +{ + if (generated->counter_reset) + return readCounter(c, generated->counter_reset); + else + return 0; +} + +short RenderStyle::counterIncrement(const DOM::DOMString& c) const +{ + if (generated->counter_increment) + return readCounter(c, generated->counter_increment); + else + return 0; +} + +void RenderStyle::setCounterReset(CSSValueListImpl *l) +{ + CSSValueListImpl *t = generated->counter_reset; + generated.access()->counter_reset = l; + if (l) l->ref(); + if (t) t->deref(); +} + +void RenderStyle::setCounterIncrement(CSSValueListImpl *l) +{ + CSSValueListImpl *t = generated->counter_increment; + generated.access()->counter_increment = l; + if (l) l->ref(); + if (t) t->deref(); +} + +#ifdef ENABLE_DUMP + +static QString describeFont( const QFont &f) +{ + QString res = "'" + f.family() + "' "; + + if ( f.pointSize() > 0) + res += QString::number( f.pointSize() ) + "pt"; + else + res += QString::number( f.pixelSize() ) + "px"; + + if ( f.bold() ) + res += " bold"; + if ( f.italic() ) + res += " italic"; + if ( f.underline() ) + res += " underline"; + if ( f.overline() ) + res += " overline"; + if ( f.strikeOut() ) + res += " strikeout"; + return res; +} + +QString RenderStyle::createDiff( const RenderStyle &parent ) const +{ + QString res; + if ( color().isValid() && parent.color() != color() ) + res += " [color=" + color().name() + "]"; + if ( backgroundColor().isValid() && parent.backgroundColor() != backgroundColor() ) + res += " [bgcolor=" + backgroundColor().name() + "]"; + if ( parent.font() != font() ) + res += " [font=" + describeFont( font() ) + "]"; + + return res; +} +#endif + +RenderPageStyle::RenderPageStyle() : next(0), m_pageType(ANY_PAGE) +{ +} + +RenderPageStyle::~RenderPageStyle() +{ + delete next; +} + +RenderPageStyle* RenderPageStyle::getPageStyle(PageType type) +{ + RenderPageStyle *ps = 0; + for (ps = this; ps; ps = ps->next) + if (ps->m_pageType==type) + break; + return ps; +} + +RenderPageStyle* RenderPageStyle::addPageStyle(PageType type) +{ + RenderPageStyle *ps = getPageStyle(type); + + if (!ps) + { + ps = new RenderPageStyle(*this); // use the real copy constructor to get an identical copy + ps->m_pageType = type; + + ps->next = next; + next = ps; + } + + return ps; +} + +void RenderPageStyle::removePageStyle(PageType type) +{ + RenderPageStyle *ps = next; + RenderPageStyle *prev = this; + + while (ps) { + if (ps->m_pageType==type) { + prev->next = ps->next; + delete ps; + return; + } + prev = ps; + ps = ps->next; + } +} |