/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
* Copyright (C) 2009 Google Inc. All rights reserved.
* Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.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 "config.h"
#include "RenderObject.h"
#include "AXObjectCache.h"
#include "CSSStyleSelector.h"
#include "Chrome.h"
#include "ContentData.h"
#include "CursorList.h"
#include "DashArray.h"
#include "EditingBoundary.h"
#include "FloatQuad.h"
#include "Frame.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "HTMLNames.h"
#include "HitTestResult.h"
#include "Page.h"
#include "RenderArena.h"
#include "RenderCounter.h"
#include "RenderFlexibleBox.h"
#include "RenderImage.h"
#include "RenderImageResourceStyleImage.h"
#include "RenderInline.h"
#include "RenderLayer.h"
#include "RenderListItem.h"
#include "RenderRuby.h"
#include "RenderRubyText.h"
#include "RenderTableCell.h"
#include "RenderTableCol.h"
#include "RenderTableRow.h"
#include "RenderTheme.h"
#include "RenderView.h"
#include "TransformState.h"
#include "htmlediting.h"
#include <algorithm>
#ifdef ANDROID_LAYOUT
#include "Settings.h"
#endif
#include <stdio.h>
#include <wtf/RefCountedLeakCounter.h>
#include <wtf/UnusedParam.h>
#if USE(ACCELERATED_COMPOSITING)
#include "RenderLayerCompositor.h"
#endif
#if ENABLE(WML)
#include "WMLNames.h"
#endif
#if ENABLE(SVG)
#include "RenderSVGResourceContainer.h"
#include "SVGRenderSupport.h"
#endif
using namespace std;
namespace WebCore {
using namespace HTMLNames;
#ifndef NDEBUG
static void* baseOfRenderObjectBeingDeleted;
#endif
bool RenderObject::s_affectsParentBlock = false;
void* RenderObject::operator new(size_t sz, RenderArena* renderArena) throw()
{
return renderArena->allocate(sz);
}
void RenderObject::operator delete(void* ptr, size_t sz)
{
ASSERT(baseOfRenderObjectBeingDeleted == ptr);
// Stash size where destroy can find it.
*(size_t *)ptr = sz;
}
RenderObject* RenderObject::createObject(Node* node, RenderStyle* style)
{
Document* doc = node->document();
RenderArena* arena = doc->renderArena();
// Minimal support for content properties replacing an entire element.
// Works only if we have exactly one piece of content and it's a URL.
// Otherwise acts as if we didn't support this feature.
const ContentData* contentData = style->contentData();
if (contentData && !contentData->next() && contentData->isImage() && doc != node) {
RenderImage* image = new (arena) RenderImage(node);
image->setStyle(style);
if (StyleImage* styleImage = contentData->image())
image->setImageResource(RenderImageResourceStyleImage::create(styleImage));
else
image->setImageResource(RenderImageResource::create());
return image;
}
if (node->hasTagName(rubyTag)) {
if (style->display() == INLINE)
return new (arena) RenderRubyAsInline(node);
else if (style->display() == BLOCK)
return new (arena) RenderRubyAsBlock(node);
}
// treat <rt> as ruby text ONLY if it still has its default treatment of block
if (node->hasTagName(rtTag) && style->display() == BLOCK)
return new (arena) RenderRubyText(node);
switch (style->display()) {
case NONE:
return 0;
case INLINE:
return new (arena) RenderInline(node);
case BLOCK:
case INLINE_BLOCK:
case RUN_IN:
case COMPACT:
return new (arena) RenderBlock(node);
case LIST_ITEM:
return new (arena) RenderListItem(node);
case TABLE:
case INLINE_TABLE:
return new (arena) RenderTable(node);
case TABLE_ROW_GROUP:
case TABLE_HEADER_GROUP:
case TABLE_FOOTER_GROUP:
return new (arena) RenderTableSection(node);
case TABLE_ROW:
return new (arena) RenderTableRow(node);
case TABLE_COLUMN_GROUP:
case TABLE_COLUMN:
return new (arena) RenderTableCol(node);
case TABLE_CELL:
return new (arena) RenderTableCell(node);
case TABLE_CAPTION:
#if ENABLE(WCSS)
// As per the section 17.1 of the spec WAP-239-WCSS-20011026-a.pdf,
// the marquee box inherits and extends the characteristics of the
// principal block box ([CSS2] section 9.2.1).
case WAP_MARQUEE:
#endif
return new (arena) RenderBlock(node);
case BOX:
case INLINE_BOX:
return new (arena) RenderFlexibleBox(node);
}
return 0;
}
#ifndef NDEBUG
static WTF::RefCountedLeakCounter renderObjectCounter("RenderObject");
#endif
RenderObject::RenderObject(Node* node)
: CachedResourceClient()
, m_style(0)
, m_node(node)
, m_parent(0)
, m_previous(0)
, m_next(0)
#ifndef NDEBUG
, m_hasAXObject(false)
, m_setNeedsLayoutForbidden(false)
#endif
, m_needsLayout(false)
, m_needsPositionedMovementLayout(false)
, m_normalChildNeedsLayout(false)
, m_posChildNeedsLayout(false)
, m_needsSimplifiedNormalFlowLayout(false)
, m_preferredLogicalWidthsDirty(false)
, m_floating(false)
, m_positioned(false)
, m_relPositioned(false)
, m_paintBackground(false)
, m_isAnonymous(node == node->document())
, m_isText(false)
, m_isBox(false)
, m_inline(true)
, m_replaced(false)
, m_horizontalWritingMode(true)
, m_isDragging(false)
, m_hasLayer(false)
, m_hasOverflowClip(false)
, m_hasTransform(false)
, m_hasReflection(false)
, m_hasOverrideSize(false)
, m_hasCounterNodeMap(false)
, m_everHadLayout(false)
, m_childrenInline(false)
, m_marginBeforeQuirk(false)
, m_marginAfterQuirk(false)
, m_hasMarkupTruncation(false)
, m_selectionState(SelectionNone)
, m_hasColumns(false)
{
#ifndef NDEBUG
renderObjectCounter.increment();
#endif
ASSERT(node);
}
RenderObject::~RenderObject()
{
ASSERT(!node() || documentBeingDestroyed() || !frame()->view() || frame()->view()->layoutRoot() != this);
#ifndef NDEBUG
ASSERT(!m_hasAXObject);
renderObjectCounter.decrement();
#endif
}
RenderTheme* RenderObject::theme() const
{
ASSERT(document()->page());
return document()->page()->theme();
}
bool RenderObject::isDescendantOf(const RenderObject* obj) const
{
for (const RenderObject* r = this; r; r = r->m_parent) {
if (r == obj)
return true;
}
return false;
}
bool RenderObject::isBody() const
{
return node() && node()->hasTagName(bodyTag);
}
bool RenderObject::isHR() const
{
return node() && node()->hasTagName(hrTag);
}
bool RenderObject::isLegend() const
{
return node() && (node()->hasTagName(legendTag)
#if ENABLE(WML)
|| node()->hasTagName(WMLNames::insertedLegendTag)
#endif
);
}
bool RenderObject::isHTMLMarquee() const
{
return node() && node()->renderer() == this && node()->hasTagName(marqueeTag);
}
void RenderObject::addChild(RenderObject* newChild, RenderObject* beforeChild)
{
RenderObjectChildList* children = virtualChildren();
ASSERT(children);
if (!children)
return;
bool needsTable = false;
if (newChild->isTableCol() && newChild->style()->display() == TABLE_COLUMN_GROUP)
needsTable = !isTable();
else if (newChild->isRenderBlock() && newChild->style()->display() == TABLE_CAPTION)
needsTable = !isTable();
else if (newChild->isTableSection())
needsTable = !isTable();
else if (newChild->isTableRow())
needsTable = !isTableSection();
else if (newChild->isTableCell()) {
needsTable = !isTableRow();
// I'm not 100% sure this is the best way to fix this, but without this
// change we recurse infinitely when trying to render the CSS2 test page:
// http://www.bath.ac.uk/%7Epy8ieh/internet/eviltests/htmlbodyheadrendering2.html.
// See Radar 2925291.
if (needsTable && isTableCell() && !children->firstChild() && !newChild->isTableCell())
needsTable = false;
}
if (needsTable) {
RenderTable* table;
RenderObject* afterChild = beforeChild ? beforeChild->previousSibling() : children->lastChild();
if (afterChild && afterChild->isAnonymous() && afterChild->isTable())
table = toRenderTable(afterChild);
else {
table = new (renderArena()) RenderTable(document() /* is anonymous */);
RefPtr<RenderStyle> newStyle = RenderStyle::create();
newStyle->inheritFrom(style());
newStyle->setDisplay(TABLE);
table->setStyle(newStyle.release());
addChild(table, beforeChild);
}
table->addChild(newChild);
} else {
// Just add it...
children->insertChildNode(this, newChild, beforeChild);
}
if (newChild->isText() && newChild->style()->textTransform() == CAPITALIZE) {
RefPtr<StringImpl> textToTransform = toRenderText(newChild)->originalText();
if (textToTransform)
toRenderText(newChild)->setText(textToTransform.release(), true);
}
}
void RenderObject::removeChild(RenderObject* oldChild)
{
RenderObjectChildList* children = virtualChildren();
ASSERT(children);
if (!children)
return;
// We do this here instead of in removeChildNode, since the only extremely low-level uses of remove/appendChildNode
// cannot affect the positioned object list, and the floating object list is irrelevant (since the list gets cleared on
// layout anyway).
if (oldChild->isFloatingOrPositioned())
toRenderBox(oldChild)->removeFloatingOrPositionedChildFromBlockLists();
children->removeChildNode(this, oldChild);
}
RenderObject* RenderObject::nextInPreOrder() const
{
if (RenderObject* o = firstChild())
return o;
return nextInPreOrderAfterChildren();
}
RenderObject* RenderObject::nextInPreOrderAfterChildren() const
{
RenderObject* o;
if (!(o = nextSibling())) {
o = parent();
while (o && !o->nextSibling())
o = o->parent();
if (o)
o = o->nextSibling();
}
return o;
}
RenderObject* RenderObject::nextInPreOrder(const RenderObject* stayWithin) const
{
if (RenderObject* o = firstChild())
return o;
return nextInPreOrderAfterChildren(stayWithin);
}
RenderObject* RenderObject::nextInPreOrderAfterChildren(const RenderObject* stayWithin) const
{
if (this == stayWithin)
return 0;
const RenderObject* current = this;
RenderObject* next;
while (!(next = current->nextSibling())) {
current = current->parent();
if (!current || current == stayWithin)
return 0;
}
return next;
}
RenderObject* RenderObject::previousInPreOrder() const
{
if (RenderObject* o = previousSibling()) {
while (o->lastChild())
o = o->lastChild();
return o;
}
return parent();
}
RenderObject* RenderObject::childAt(unsigned index) const
{
RenderObject* child = firstChild();
for (unsigned i = 0; child && i < index; i++)
child = child->nextSibling();
return child;
}
RenderObject* RenderObject::firstLeafChild() const
{
RenderObject* r = firstChild();
while (r) {
RenderObject* n = 0;
n = r->firstChild();
if (!n)
break;
r = n;
}
return r;
}
RenderObject* RenderObject::lastLeafChild() const
{
RenderObject* r = lastChild();
while (r) {
RenderObject* n = 0;
n = r->lastChild();
if (!n)
break;
r = n;
}
return r;
}
static void addLayers(RenderObject* obj, RenderLayer* parentLayer, RenderObject*& newObject,
RenderLayer*& beforeChild)
{
if (obj->hasLayer()) {
if (!beforeChild && newObject) {
// We need to figure out the layer that follows newObject. We only do
// this the first time we find a child layer, and then we update the
// pointer values for newObject and beforeChild used by everyone else.
beforeChild = newObject->parent()->findNextLayer(parentLayer, newObject);
newObject = 0;
}
parentLayer->addChild(toRenderBoxModelObject(obj)->layer(), beforeChild);
return;
}
for (RenderObject* curr = obj->firstChild(); curr; curr = curr->nextSibling())
addLayers(curr, parentLayer, newObject, beforeChild);
}
void RenderObject::addLayers(RenderLayer* parentLayer, RenderObject* newObject)
{
if (!parentLayer)
return;
RenderObject* object = newObject;
RenderLayer* beforeChild = 0;
WebCore::addLayers(this, parentLayer, object, beforeChild);
}
void RenderObject::removeLayers(RenderLayer* parentLayer)
{
if (!parentLayer)
return;
if (hasLayer()) {
parentLayer->removeChild(toRenderBoxModelObject(this)->layer());
return;
}
for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling())
curr->removeLayers(parentLayer);
}
void RenderObject::moveLayers(RenderLayer* oldParent, RenderLayer* newParent)
{
if (!newParent)
return;
if (hasLayer()) {
RenderLayer* layer = toRenderBoxModelObject(this)->layer();
ASSERT(oldParent == layer->parent());
if (oldParent)
oldParent->removeChild(layer);
newParent->addChild(layer);
return;
}
for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling())
curr->moveLayers(oldParent, newParent);
}
RenderLayer* RenderObject::findNextLayer(RenderLayer* parentLayer, RenderObject* startPoint,
bool checkParent)
{
// Error check the parent layer passed in. If it's null, we can't find anything.
if (!parentLayer)
return 0;
// Step 1: If our layer is a child of the desired parent, then return our layer.
RenderLayer* ourLayer = hasLayer() ? toRenderBoxModelObject(this)->layer() : 0;
if (ourLayer && ourLayer->parent() == parentLayer)
return ourLayer;
// Step 2: If we don't have a layer, or our layer is the desired parent, then descend
// into our siblings trying to find the next layer whose parent is the desired parent.
if (!ourLayer || ourLayer == parentLayer) {
for (RenderObject* curr = startPoint ? startPoint->nextSibling() : firstChild();
curr; curr = curr->nextSibling()) {
RenderLayer* nextLayer = curr->findNextLayer(parentLayer, 0, false);
if (nextLayer)
return nextLayer;
}
}
// Step 3: If our layer is the desired parent layer, then we're finished. We didn't
// find anything.
if (parentLayer == ourLayer)
return 0;
// Step 4: If |checkParent| is set, climb up to our parent and check its siblings that
// follow us to see if we can locate a layer.
if (checkParent && parent())
return parent()->findNextLayer(parentLayer, this, true);
return 0;
}
RenderLayer* RenderObject::enclosingLayer() const
{
const RenderObject* curr = this;
while (curr) {
RenderLayer* layer = curr->hasLayer() ? toRenderBoxModelObject(curr)->layer() : 0;
if (layer)
return layer;
curr = curr->parent();
}
return 0;
}
RenderBox* RenderObject::enclosingBox() const
{
RenderObject* curr = const_cast<RenderObject*>(this);
while (curr) {
if (curr->isBox())
return toRenderBox(curr);
curr = curr->parent();
}
ASSERT_NOT_REACHED();
return 0;
}
RenderBoxModelObject* RenderObject::enclosingBoxModelObject() const
{
RenderObject* curr = const_cast<RenderObject*>(this);
while (curr) {
if (curr->isBoxModelObject())
return toRenderBoxModelObject(curr);
curr = curr->parent();
}
ASSERT_NOT_REACHED();
return 0;
}
RenderBlock* RenderObject::firstLineBlock() const
{
return 0;
}
void RenderObject::setPreferredLogicalWidthsDirty(bool b, bool markParents)
{
bool alreadyDirty = m_preferredLogicalWidthsDirty;
m_preferredLogicalWidthsDirty = b;
if (b && !alreadyDirty && markParents && (isText() || (style()->position() != FixedPosition && style()->position() != AbsolutePosition)))
invalidateContainerPreferredLogicalWidths();
}
void RenderObject::invalidateContainerPreferredLogicalWidths()
{
// In order to avoid pathological behavior when inlines are deeply nested, we do include them
// in the chain that we mark dirty (even though they're kind of irrelevant).
RenderObject* o = isTableCell() ? containingBlock() : container();
while (o && !o->m_preferredLogicalWidthsDirty) {
// Don't invalidate the outermost object of an unrooted subtree. That object will be
// invalidated when the subtree is added to the document.
RenderObject* container = o->isTableCell() ? o->containingBlock() : o->container();
if (!container && !o->isRenderView())
break;
o->m_preferredLogicalWidthsDirty = true;
if (o->style()->position() == FixedPosition || o->style()->position() == AbsolutePosition)
// A positioned object has no effect on the min/max width of its containing block ever.
// We can optimize this case and not go up any further.
break;
o = container;
}
}
void RenderObject::setLayerNeedsFullRepaint()
{
ASSERT(hasLayer());
toRenderBoxModelObject(this)->layer()->setNeedsFullRepaint(true);
}
RenderBlock* RenderObject::containingBlock() const
{
if (isTableCell()) {
const RenderTableCell* cell = toRenderTableCell(this);
if (parent() && cell->section())
return cell->table();
return 0;
}
if (isRenderView())
return const_cast<RenderView*>(toRenderView(this));
RenderObject* o = parent();
if (!isText() && m_style->position() == FixedPosition) {
while (o && !o->isRenderView() && !(o->hasTransform() && o->isRenderBlock()))
o = o->parent();
} else if (!isText() && m_style->position() == AbsolutePosition) {
while (o && (o->style()->position() == StaticPosition || (o->isInline() && !o->isReplaced())) && !o->isRenderView() && !(o->hasTransform() && o->isRenderBlock())) {
// For relpositioned inlines, we return the nearest enclosing block. We don't try
// to return the inline itself. This allows us to avoid having a positioned objects
// list in all RenderInlines and lets us return a strongly-typed RenderBlock* result
// from this method. The container() method can actually be used to obtain the
// inline directly.
if (o->style()->position() == RelativePosition && o->isInline() && !o->isReplaced())
return o->containingBlock();
#if ENABLE(SVG)
if (o->isSVGForeignObject()) //foreignObject is the containing block for contents inside it
break;
#endif
o = o->parent();
}
} else {
while (o && ((o->isInline() && !o->isReplaced()) || o->isTableRow() || o->isTableSection()
|| o->isTableCol() || o->isFrameSet() || o->isMedia()
#if ENABLE(SVG)
|| o->isSVGContainer() || o->isSVGRoot()
#endif
))
o = o->parent();
}
if (!o || !o->isRenderBlock())
return 0; // This can still happen in case of an orphaned tree
return toRenderBlock(o);
}
static bool mustRepaintFillLayers(const RenderObject* renderer, const FillLayer* layer)
{
// Nobody will use multiple layers without wanting fancy positioning.
if (layer->next())
return true;
// Make sure we have a valid image.
StyleImage* img = layer->image();
if (!img || !img->canRender(renderer->style()->effectiveZoom()))
return false;
if (!layer->xPosition().isZero() || !layer->yPosition().isZero())
return true;
if (layer->size().type == SizeLength) {
if (layer->size().size.width().isPercent() || layer->size().size.height().isPercent())
return true;
} else if (layer->size().type == Contain || layer->size().type == Cover || img->usesImageContainerSize())
return true;
return false;
}
bool RenderObject::mustRepaintBackgroundOrBorder() const
{
if (hasMask() && mustRepaintFillLayers(this, style()->maskLayers()))
return true;
// If we don't have a background/border/mask, then nothing to do.
if (!hasBoxDecorations())
return false;
if (mustRepaintFillLayers(this, style()->backgroundLayers()))
return true;
// Our fill layers are ok. Let's check border.
if (style()->hasBorder()) {
// Border images are not ok.
StyleImage* borderImage = style()->borderImage().image();
bool shouldPaintBorderImage = borderImage && borderImage->canRender(style()->effectiveZoom());
// If the image hasn't loaded, we're still using the normal border style.
if (shouldPaintBorderImage && borderImage->isLoaded())
return true;
}
return false;
}
void RenderObject::drawLineForBoxSide(GraphicsContext* graphicsContext, int x1, int y1, int x2, int y2,
BoxSide side, Color color, EBorderStyle style,
int adjacentWidth1, int adjacentWidth2, bool antialias)
{
int width = (side == BSTop || side == BSBottom ? y2 - y1 : x2 - x1);
if (style == DOUBLE && width < 3)
style = SOLID;
switch (style) {
case BNONE:
case BHIDDEN:
return;
case DOTTED:
case DASHED:
graphicsContext->setStrokeColor(color, m_style->colorSpace());
graphicsContext->setStrokeThickness(width);
graphicsContext->setStrokeStyle(style == DASHED ? DashedStroke : DottedStroke);
if (width > 0) {
bool wasAntialiased = graphicsContext->shouldAntialias();
graphicsContext->setShouldAntialias(antialias);
switch (side) {
case BSBottom:
case BSTop:
graphicsContext->drawLine(IntPoint(x1, (y1 + y2) / 2), IntPoint(x2, (y1 + y2) / 2));
break;
case BSRight:
case BSLeft:
graphicsContext->drawLine(IntPoint((x1 + x2) / 2, y1), IntPoint((x1 + x2) / 2, y2));
break;
}
graphicsContext->setShouldAntialias(wasAntialiased);
}
break;
case DOUBLE: {
int third = (width + 1) / 3;
if (adjacentWidth1 == 0 && adjacentWidth2 == 0) {
graphicsContext->setStrokeStyle(NoStroke);
graphicsContext->setFillColor(color, m_style->colorSpace());
bool wasAntialiased = graphicsContext->shouldAntialias();
graphicsContext->setShouldAntialias(antialias);
switch (side) {
case BSTop:
case BSBottom:
graphicsContext->drawRect(IntRect(x1, y1, x2 - x1, third));
graphicsContext->drawRect(IntRect(x1, y2 - third, x2 - x1, third));
break;
case BSLeft:
graphicsContext->drawRect(IntRect(x1, y1 + 1, third, y2 - y1 - 1));
graphicsContext->drawRect(IntRect(x2 - third, y1 + 1, third, y2 - y1 - 1));
break;
case BSRight:
graphicsContext->drawRect(IntRect(x1, y1 + 1, third, y2 - y1 - 1));
graphicsContext->drawRect(IntRect(x2 - third, y1 + 1, third, y2 - y1 - 1));
break;
}
graphicsContext->setShouldAntialias(wasAntialiased);
} else {
int adjacent1BigThird = ((adjacentWidth1 > 0) ? adjacentWidth1 + 1 : adjacentWidth1 - 1) / 3;
int adjacent2BigThird = ((adjacentWidth2 > 0) ? adjacentWidth2 + 1 : adjacentWidth2 - 1) / 3;
switch (side) {
case BSTop:
drawLineForBoxSide(graphicsContext, x1 + max((-adjacentWidth1 * 2 + 1) / 3, 0),
y1, x2 - max((-adjacentWidth2 * 2 + 1) / 3, 0), y1 + third,
side, color, SOLID, adjacent1BigThird, adjacent2BigThird, antialias);
drawLineForBoxSide(graphicsContext, x1 + max((adjacentWidth1 * 2 + 1) / 3, 0),
y2 - third, x2 - max((adjacentWidth2 * 2 + 1) / 3, 0), y2,
side, color, SOLID, adjacent1BigThird, adjacent2BigThird, antialias);
break;
case BSLeft:
drawLineForBoxSide(graphicsContext, x1, y1 + max((-adjacentWidth1 * 2 + 1) / 3, 0),
x1 + third, y2 - max((-adjacentWidth2 * 2 + 1) / 3, 0),
side, color, SOLID, adjacent1BigThird, adjacent2BigThird, antialias);
drawLineForBoxSide(graphicsContext, x2 - third, y1 + max((adjacentWidth1 * 2 + 1) / 3, 0),
x2, y2 - max((adjacentWidth2 * 2 + 1) / 3, 0),
side, color, SOLID, adjacent1BigThird, adjacent2BigThird, antialias);
break;
case BSBottom:
drawLineForBoxSide(graphicsContext, x1 + max((adjacentWidth1 * 2 + 1) / 3, 0),
y1, x2 - max((adjacentWidth2 * 2 + 1) / 3, 0), y1 + third,
side, color, SOLID, adjacent1BigThird, adjacent2BigThird, antialias);
drawLineForBoxSide(graphicsContext, x1 + max((-adjacentWidth1 * 2 + 1) / 3, 0),
y2 - third, x2 - max((-adjacentWidth2 * 2 + 1) / 3, 0), y2,
side, color, SOLID, adjacent1BigThird, adjacent2BigThird, antialias);
break;
case BSRight:
drawLineForBoxSide(graphicsContext, x1, y1 + max((adjacentWidth1 * 2 + 1) / 3, 0),
x1 + third, y2 - max((adjacentWidth2 * 2 + 1) / 3, 0),
side, color, SOLID, adjacent1BigThird, adjacent2BigThird, antialias);
drawLineForBoxSide(graphicsContext, x2 - third, y1 + max((-adjacentWidth1 * 2 + 1) / 3, 0),
x2, y2 - max((-adjacentWidth2 * 2 + 1) / 3, 0),
side, color, SOLID, adjacent1BigThird, adjacent2BigThird, antialias);
break;
default:
break;
}
}
break;
}
case RIDGE:
case GROOVE: {
EBorderStyle s1;
EBorderStyle s2;
if (style == GROOVE) {
s1 = INSET;
s2 = OUTSET;
} else {
s1 = OUTSET;
s2 = INSET;
}
int adjacent1BigHalf = ((adjacentWidth1 > 0) ? adjacentWidth1 + 1 : adjacentWidth1 - 1) / 2;
int adjacent2BigHalf = ((adjacentWidth2 > 0) ? adjacentWidth2 + 1 : adjacentWidth2 - 1) / 2;
switch (side) {
case BSTop:
drawLineForBoxSide(graphicsContext, x1 + max(-adjacentWidth1, 0) / 2, y1, x2 - max(-adjacentWidth2, 0) / 2, (y1 + y2 + 1) / 2,
side, color, s1, adjacent1BigHalf, adjacent2BigHalf, antialias);
drawLineForBoxSide(graphicsContext, x1 + max(adjacentWidth1 + 1, 0) / 2, (y1 + y2 + 1) / 2, x2 - max(adjacentWidth2 + 1, 0) / 2, y2,
side, color, s2, adjacentWidth1 / 2, adjacentWidth2 / 2, antialias);
break;
case BSLeft:
drawLineForBoxSide(graphicsContext, x1, y1 + max(-adjacentWidth1, 0) / 2, (x1 + x2 + 1) / 2, y2 - max(-adjacentWidth2, 0) / 2,
side, color, s1, adjacent1BigHalf, adjacent2BigHalf, antialias);
drawLineForBoxSide(graphicsContext, (x1 + x2 + 1) / 2, y1 + max(adjacentWidth1 + 1, 0) / 2, x2, y2 - max(adjacentWidth2 + 1, 0) / 2,
side, color, s2, adjacentWidth1 / 2, adjacentWidth2 / 2, antialias);
break;
case BSBottom:
drawLineForBoxSide(graphicsContext, x1 + max(adjacentWidth1, 0) / 2, y1, x2 - max(adjacentWidth2, 0) / 2, (y1 + y2 + 1) / 2,
side, color, s2, adjacent1BigHalf, adjacent2BigHalf, antialias);
drawLineForBoxSide(graphicsContext, x1 + max(-adjacentWidth1 + 1, 0) / 2, (y1 + y2 + 1) / 2, x2 - max(-adjacentWidth2 + 1, 0) / 2, y2,
side, color, s1, adjacentWidth1 / 2, adjacentWidth2 / 2, antialias);
break;
case BSRight:
drawLineForBoxSide(graphicsContext, x1, y1 + max(adjacentWidth1, 0) / 2, (x1 + x2 + 1) / 2, y2 - max(adjacentWidth2, 0) / 2,
side, color, s2, adjacent1BigHalf, adjacent2BigHalf, antialias);
drawLineForBoxSide(graphicsContext, (x1 + x2 + 1) / 2, y1 + max(-adjacentWidth1 + 1, 0) / 2, x2, y2 - max(-adjacentWidth2 + 1, 0) / 2,
side, color, s1, adjacentWidth1 / 2, adjacentWidth2 / 2, antialias);
break;
}
break;
}
case INSET:
// FIXME: Maybe we should lighten the colors on one side like Firefox.
// https://bugs.webkit.org/show_bug.cgi?id=58608
if (side == BSTop || side == BSLeft)
color = color.dark();
// fall through
case OUTSET:
if (style == OUTSET && (side == BSBottom || side == BSRight))
color = color.dark();
// fall through
case SOLID: {
graphicsContext->setStrokeStyle(NoStroke);
graphicsContext->setFillColor(color, m_style->colorSpace());
ASSERT(x2 >= x1);
ASSERT(y2 >= y1);
if (!adjacentWidth1 && !adjacentWidth2) {
// Turn off antialiasing to match the behavior of drawConvexPolygon();
// this matters for rects in transformed contexts.
bool wasAntialiased = graphicsContext->shouldAntialias();
graphicsContext->setShouldAntialias(antialias);
graphicsContext->drawRect(IntRect(x1, y1, x2 - x1, y2 - y1));
graphicsContext->setShouldAntialias(wasAntialiased);
return;
}
FloatPoint quad[4];
switch (side) {
case BSTop:
quad[0] = FloatPoint(x1 + max(-adjacentWidth1, 0), y1);
quad[1] = FloatPoint(x1 + max(adjacentWidth1, 0), y2);
quad[2] = FloatPoint(x2 - max(adjacentWidth2, 0), y2);
quad[3] = FloatPoint(x2 - max(-adjacentWidth2, 0), y1);
break;
case BSBottom:
quad[0] = FloatPoint(x1 + max(adjacentWidth1, 0), y1);
quad[1] = FloatPoint(x1 + max(-adjacentWidth1, 0), y2);
quad[2] = FloatPoint(x2 - max(-adjacentWidth2, 0), y2);
quad[3] = FloatPoint(x2 - max(adjacentWidth2, 0), y1);
break;
case BSLeft:
quad[0] = FloatPoint(x1, y1 + max(-adjacentWidth1, 0));
quad[1] = FloatPoint(x1, y2 - max(-adjacentWidth2, 0));
quad[2] = FloatPoint(x2, y2 - max(adjacentWidth2, 0));
quad[3] = FloatPoint(x2, y1 + max(adjacentWidth1, 0));
break;
case BSRight:
quad[0] = FloatPoint(x1, y1 + max(adjacentWidth1, 0));
quad[1] = FloatPoint(x1, y2 - max(adjacentWidth2, 0));
quad[2] = FloatPoint(x2, y2 - max(-adjacentWidth2, 0));
quad[3] = FloatPoint(x2, y1 + max(-adjacentWidth1, 0));
break;
}
graphicsContext->drawConvexPolygon(4, quad, antialias);
break;
}
}
}
IntRect RenderObject::borderInnerRect(const IntRect& borderRect, unsigned short topWidth, unsigned short bottomWidth, unsigned short leftWidth, unsigned short rightWidth) const
{
return IntRect(
borderRect.x() + leftWidth,
borderRect.y() + topWidth,
borderRect.width() - leftWidth - rightWidth,
borderRect.height() - topWidth - bottomWidth);
}
#if !HAVE(PATH_BASED_BORDER_RADIUS_DRAWING)
void RenderObject::drawArcForBoxSide(GraphicsContext* graphicsContext, int x, int y, float thickness, const IntSize& radius,
int angleStart, int angleSpan, BoxSide s, Color color,
EBorderStyle style, bool firstCorner)
{
// FIXME: This function should be removed when all ports implement GraphicsContext::clipConvexPolygon()!!
// At that time, everyone can use RenderObject::drawBoxSideFromPath() instead. This should happen soon.
if ((style == DOUBLE && thickness / 2 < 3) || ((style == RIDGE || style == GROOVE) && thickness / 2 < 2))
style = SOLID;
switch (style) {
case BNONE:
case BHIDDEN:
return;
case DOTTED:
case DASHED:
graphicsContext->setStrokeColor(color, m_style->colorSpace());
graphicsContext->setStrokeStyle(style == DOTTED ? DottedStroke : DashedStroke);
graphicsContext->setStrokeThickness(thickness);
graphicsContext->strokeArc(IntRect(x, y, radius.width() * 2, radius.height() * 2), angleStart, angleSpan);
break;
case DOUBLE: {
float third = thickness / 3.0f;
float innerThird = (thickness + 1.0f) / 6.0f;
int shiftForInner = static_cast<int>(innerThird * 2.5f);
int outerY = y;
int outerHeight = radius.height() * 2;
int innerX = x + shiftForInner;
int innerY = y + shiftForInner;
int innerWidth = (radius.width() - shiftForInner) * 2;
int innerHeight = (radius.height() - shiftForInner) * 2;
if (innerThird > 1 && (s == BSTop || (firstCorner && (s == BSLeft || s == BSRight)))) {
outerHeight += 2;
innerHeight += 2;
}
graphicsContext->setStrokeStyle(SolidStroke);
graphicsContext->setStrokeColor(color, m_style->colorSpace());
graphicsContext->setStrokeThickness(third);
graphicsContext->strokeArc(IntRect(x, outerY, radius.width() * 2, outerHeight), angleStart, angleSpan);
graphicsContext->setStrokeThickness(innerThird > 2 ? innerThird - 1 : innerThird);
graphicsContext->strokeArc(IntRect(innerX, innerY, innerWidth, innerHeight), angleStart, angleSpan);
break;
}
case GROOVE:
case RIDGE: {
Color c2;
if ((style == RIDGE && (s == BSTop || s == BSLeft)) ||
(style == GROOVE && (s == BSBottom || s == BSRight)))
c2 = color.dark();
else {
c2 = color;
color = color.dark();
}
graphicsContext->setStrokeStyle(SolidStroke);
graphicsContext->setStrokeColor(color, m_style->colorSpace());
graphicsContext->setStrokeThickness(thickness);
graphicsContext->strokeArc(IntRect(x, y, radius.width() * 2, radius.height() * 2), angleStart, angleSpan);
float halfThickness = (thickness + 1.0f) / 4.0f;
int shiftForInner = static_cast<int>(halfThickness * 1.5f);
graphicsContext->setStrokeColor(c2, m_style->colorSpace());
graphicsContext->setStrokeThickness(halfThickness > 2 ? halfThickness - 1 : halfThickness);
graphicsContext->strokeArc(IntRect(x + shiftForInner, y + shiftForInner, (radius.width() - shiftForInner) * 2,
(radius.height() - shiftForInner) * 2), angleStart, angleSpan);
break;
}
case INSET:
if (s == BSTop || s == BSLeft)
color = color.dark();
case OUTSET:
if (style == OUTSET && (s == BSBottom || s == BSRight))
color = color.dark();
case SOLID:
graphicsContext->setStrokeStyle(SolidStroke);
graphicsContext->setStrokeColor(color, m_style->colorSpace());
graphicsContext->setStrokeThickness(thickness);
graphicsContext->strokeArc(IntRect(x, y, radius.width() * 2, radius.height() * 2), angleStart, angleSpan);
break;
}
}
#endif
void RenderObject::paintFocusRing(GraphicsContext* context, int tx, int ty, RenderStyle* style)
{
Vector<IntRect> focusRingRects;
addFocusRingRects(focusRingRects, tx, ty);
if (style->outlineStyleIsAuto())
context->drawFocusRing(focusRingRects, style->outlineWidth(), style->outlineOffset(), style->visitedDependentColor(CSSPropertyOutlineColor));
else
addPDFURLRect(context, unionRect(focusRingRects));
}
void RenderObject::addPDFURLRect(GraphicsContext* context, const IntRect& rect)
{
if (rect.isEmpty())
return;
Node* n = node();
if (!n || !n->isLink() || !n->isElementNode())
return;
const AtomicString& href = static_cast<Element*>(n)->getAttribute(hrefAttr);
if (href.isNull())
return;
context->setURLForRect(n->document()->completeURL(href), rect);
}
void RenderObject::paintOutline(GraphicsContext* graphicsContext, int tx, int ty, int w, int h)
{
if (!hasOutline())
return;
RenderStyle* styleToUse = style();
int ow = styleToUse->outlineWidth();
EBorderStyle os = styleToUse->outlineStyle();
Color oc = styleToUse->visitedDependentColor(CSSPropertyOutlineColor);
int offset = styleToUse->outlineOffset();
if (styleToUse->outlineStyleIsAuto() || hasOutlineAnnotation()) {
if (!theme()->supportsFocusRing(styleToUse)) {
// Only paint the focus ring by hand if the theme isn't able to draw the focus ring.
paintFocusRing(graphicsContext, tx, ty, styleToUse);
}
}
if (styleToUse->outlineStyleIsAuto() || styleToUse->outlineStyle() == BNONE)
return;
tx -= offset;
ty -= offset;
w += 2 * offset;
h += 2 * offset;
if (h < 0 || w < 0)
return;
drawLineForBoxSide(graphicsContext, tx - ow, ty - ow, tx, ty + h + ow, BSLeft, oc, os, ow, ow);
drawLineForBoxSide(graphicsContext, tx - ow, ty - ow, tx + w + ow, ty, BSTop, oc, os, ow, ow);
drawLineForBoxSide(graphicsContext, tx + w, ty - ow, tx + w + ow, ty + h + ow, BSRight, oc, os, ow, ow);
drawLineForBoxSide(graphicsContext, tx - ow, ty + h, tx + w + ow, ty + h + ow, BSBottom, oc, os, ow, ow);
}
IntRect RenderObject::absoluteBoundingBoxRect(bool useTransforms)
{
if (useTransforms) {
Vector<FloatQuad> quads;
absoluteQuads(quads);
size_t n = quads.size();
if (!n)
return IntRect();
IntRect result = quads[0].enclosingBoundingBox();
for (size_t i = 1; i < n; ++i)
result.unite(quads[i].enclosingBoundingBox());
return result;
}
FloatPoint absPos = localToAbsolute();
Vector<IntRect> rects;
absoluteRects(rects, absPos.x(), absPos.y());
size_t n = rects.size();
if (!n)
return IntRect();
IntRect result = rects[0];
for (size_t i = 1; i < n; ++i)
result.unite(rects[i]);
return result;
}
void RenderObject::absoluteFocusRingQuads(Vector<FloatQuad>& quads)
{
Vector<IntRect> rects;
// FIXME: addFocusRingRects() needs to be passed this transform-unaware
// localToAbsolute() offset here because RenderInline::addFocusRingRects()
// implicitly assumes that. This doesn't work correctly with transformed
// descendants.
FloatPoint absolutePoint = localToAbsolute();
addFocusRingRects(rects, absolutePoint.x(), absolutePoint.y());
size_t count = rects.size();
for (size_t i = 0; i < count; ++i) {
IntRect rect = rects[i];
rect.move(-absolutePoint.x(), -absolutePoint.y());
quads.append(localToAbsoluteQuad(FloatQuad(rect)));
}
}
void RenderObject::addAbsoluteRectForLayer(IntRect& result)
{
if (hasLayer())
result.unite(absoluteBoundingBoxRect());
for (RenderObject* current = firstChild(); current; current = current->nextSibling())
current->addAbsoluteRectForLayer(result);
}
IntRect RenderObject::paintingRootRect(IntRect& topLevelRect)
{
IntRect result = absoluteBoundingBoxRect();
topLevelRect = result;
for (RenderObject* current = firstChild(); current; current = current->nextSibling())
current->addAbsoluteRectForLayer(result);
return result;
}
void RenderObject::paint(PaintInfo& /*paintInfo*/, int /*tx*/, int /*ty*/)
{
}
RenderBoxModelObject* RenderObject::containerForRepaint() const
{
#if USE(ACCELERATED_COMPOSITING)
if (RenderView* v = view()) {
if (v->usesCompositing()) {
RenderLayer* compLayer = enclosingLayer()->enclosingCompositingLayer();
return compLayer ? compLayer->renderer() : 0;
}
}
#endif
// Do root-relative repaint.
return 0;
}
void RenderObject::repaintUsingContainer(RenderBoxModelObject* repaintContainer, const IntRect& r, bool immediate)
{
if (!repaintContainer) {
view()->repaintViewRectangle(r, immediate);
return;
}
#if USE(ACCELERATED_COMPOSITING)
RenderView* v = view();
if (repaintContainer->isRenderView()) {
ASSERT(repaintContainer == v);
if (!v->hasLayer() || !v->layer()->isComposited() || v->layer()->backing()->paintingGoesToWindow()) {
v->repaintViewRectangle(r, immediate);
return;
}
}
if (v->usesCompositing()) {
ASSERT(repaintContainer->hasLayer() && repaintContainer->layer()->isComposited());
repaintContainer->layer()->setBackingNeedsRepaintInRect(r);
}
#else
if (repaintContainer->isRenderView())
toRenderView(repaintContainer)->repaintViewRectangle(r, immediate);
#endif
}
void RenderObject::repaint(bool immediate)
{
// Don't repaint if we're unrooted (note that view() still returns the view when unrooted)
RenderView* view;
if (!isRooted(&view))
return;
if (view->printing())
return; // Don't repaint if we're printing.
RenderBoxModelObject* repaintContainer = containerForRepaint();
repaintUsingContainer(repaintContainer ? repaintContainer : view, clippedOverflowRectForRepaint(repaintContainer), immediate);
}
void RenderObject::repaintRectangle(const IntRect& r, bool immediate)
{
// Don't repaint if we're unrooted (note that view() still returns the view when unrooted)
RenderView* view;
if (!isRooted(&view))
return;
if (view->printing())
return; // Don't repaint if we're printing.
IntRect dirtyRect(r);
// FIXME: layoutDelta needs to be applied in parts before/after transforms and
// repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308
dirtyRect.move(view->layoutDelta());
RenderBoxModelObject* repaintContainer = containerForRepaint();
computeRectForRepaint(repaintContainer, dirtyRect);
repaintUsingContainer(repaintContainer ? repaintContainer : view, dirtyRect, immediate);
}
bool RenderObject::repaintAfterLayoutIfNeeded(RenderBoxModelObject* repaintContainer, const IntRect& oldBounds, const IntRect& oldOutlineBox, const IntRect* newBoundsPtr, const IntRect* newOutlineBoxRectPtr)
{
RenderView* v = view();
if (v->printing())
return false; // Don't repaint if we're printing.
// This ASSERT fails due to animations. See https://bugs.webkit.org/show_bug.cgi?id=37048
// ASSERT(!newBoundsPtr || *newBoundsPtr == clippedOverflowRectForRepaint(repaintContainer));
IntRect newBounds = newBoundsPtr ? *newBoundsPtr : clippedOverflowRectForRepaint(repaintContainer);
IntRect newOutlineBox;
bool fullRepaint = selfNeedsLayout();
// Presumably a background or a border exists if border-fit:lines was specified.
if (!fullRepaint && style()->borderFit() == BorderFitLines)
fullRepaint = true;
if (!fullRepaint) {
// This ASSERT fails due to animations. See https://bugs.webkit.org/show_bug.cgi?id=37048
// ASSERT(!newOutlineBoxRectPtr || *newOutlineBoxRectPtr == outlineBoundsForRepaint(repaintContainer));
newOutlineBox = newOutlineBoxRectPtr ? *newOutlineBoxRectPtr : outlineBoundsForRepaint(repaintContainer);
if (newOutlineBox.location() != oldOutlineBox.location() || (mustRepaintBackgroundOrBorder() && (newBounds != oldBounds || newOutlineBox != oldOutlineBox)))
fullRepaint = true;
}
if (!repaintContainer)
repaintContainer = v;
if (fullRepaint) {
repaintUsingContainer(repaintContainer, oldBounds);
if (newBounds != oldBounds)
repaintUsingContainer(repaintContainer, newBounds);
return true;
}
if (newBounds == oldBounds && newOutlineBox == oldOutlineBox)
return false;
int deltaLeft = newBounds.x() - oldBounds.x();
if (deltaLeft > 0)
repaintUsingContainer(repaintContainer, IntRect(oldBounds.x(), oldBounds.y(), deltaLeft, oldBounds.height()));
else if (deltaLeft < 0)
repaintUsingContainer(repaintContainer, IntRect(newBounds.x(), newBounds.y(), -deltaLeft, newBounds.height()));
int deltaRight = newBounds.maxX() - oldBounds.maxX();
if (deltaRight > 0)
repaintUsingContainer(repaintContainer, IntRect(oldBounds.maxX(), newBounds.y(), deltaRight, newBounds.height()));
else if (deltaRight < 0)
repaintUsingContainer(repaintContainer, IntRect(newBounds.maxX(), oldBounds.y(), -deltaRight, oldBounds.height()));
int deltaTop = newBounds.y() - oldBounds.y();
if (deltaTop > 0)
repaintUsingContainer(repaintContainer, IntRect(oldBounds.x(), oldBounds.y(), oldBounds.width(), deltaTop));
else if (deltaTop < 0)
repaintUsingContainer(repaintContainer, IntRect(newBounds.x(), newBounds.y(), newBounds.width(), -deltaTop));
int deltaBottom = newBounds.maxY() - oldBounds.maxY();
if (deltaBottom > 0)
repaintUsingContainer(repaintContainer, IntRect(newBounds.x(), oldBounds.maxY(), newBounds.width(), deltaBottom));
else if (deltaBottom < 0)
repaintUsingContainer(repaintContainer, IntRect(oldBounds.x(), newBounds.maxY(), oldBounds.width(), -deltaBottom));
if (newOutlineBox == oldOutlineBox)
return false;
// We didn't move, but we did change size. Invalidate the delta, which will consist of possibly
// two rectangles (but typically only one).
RenderStyle* outlineStyle = outlineStyleForRepaint();
int ow = outlineStyle->outlineSize();
int width = abs(newOutlineBox.width() - oldOutlineBox.width());
if (width) {
int shadowLeft;
int shadowRight;
style()->getBoxShadowHorizontalExtent(shadowLeft, shadowRight);
int borderRight = isBox() ? toRenderBox(this)->borderRight() : 0;
int boxWidth = isBox() ? toRenderBox(this)->width() : 0;
int borderWidth = max(-outlineStyle->outlineOffset(), max(borderRight, max(style()->borderTopRightRadius().width().calcValue(boxWidth), style()->borderBottomRightRadius().width().calcValue(boxWidth)))) + max(ow, shadowRight);
IntRect rightRect(newOutlineBox.x() + min(newOutlineBox.width(), oldOutlineBox.width()) - borderWidth,
newOutlineBox.y(),
width + borderWidth,
max(newOutlineBox.height(), oldOutlineBox.height()));
int right = min(newBounds.maxX(), oldBounds.maxX());
if (rightRect.x() < right) {
rightRect.setWidth(min(rightRect.width(), right - rightRect.x()));
repaintUsingContainer(repaintContainer, rightRect);
}
}
int height = abs(newOutlineBox.height() - oldOutlineBox.height());
if (height) {
int shadowTop;
int shadowBottom;
style()->getBoxShadowVerticalExtent(shadowTop, shadowBottom);
int borderBottom = isBox() ? toRenderBox(this)->borderBottom() : 0;
int boxHeight = isBox() ? toRenderBox(this)->height() : 0;
int borderHeight = max(-outlineStyle->outlineOffset(), max(borderBottom, max(style()->borderBottomLeftRadius().height().calcValue(boxHeight), style()->borderBottomRightRadius().height().calcValue(boxHeight)))) + max(ow, shadowBottom);
IntRect bottomRect(newOutlineBox.x(),
min(newOutlineBox.maxY(), oldOutlineBox.maxY()) - borderHeight,
max(newOutlineBox.width(), oldOutlineBox.width()),
height + borderHeight);
int bottom = min(newBounds.maxY(), oldBounds.maxY());
if (bottomRect.y() < bottom) {
bottomRect.setHeight(min(bottomRect.height(), bottom - bottomRect.y()));
repaintUsingContainer(repaintContainer, bottomRect);
}
}
return false;
}
void RenderObject::repaintDuringLayoutIfMoved(const IntRect&)
{
}
void RenderObject::repaintOverhangingFloats(bool)
{
}
bool RenderObject::checkForRepaintDuringLayout() const
{
// FIXME: <https://bugs.webkit.org/show_bug.cgi?id=20885> It is probably safe to also require
// m_everHadLayout. Currently, only RenderBlock::layoutBlock() adds this condition. See also
// <https://bugs.webkit.org/show_bug.cgi?id=15129>.
return !document()->view()->needsFullRepaint() && !hasLayer();
}
IntRect RenderObject::rectWithOutlineForRepaint(RenderBoxModelObject* repaintContainer, int outlineWidth)
{
IntRect r(clippedOverflowRectForRepaint(repaintContainer));
r.inflate(outlineWidth);
return r;
}
IntRect RenderObject::clippedOverflowRectForRepaint(RenderBoxModelObject*)
{
ASSERT_NOT_REACHED();
return IntRect();
}
void RenderObject::computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect& rect, bool fixed)
{
if (repaintContainer == this)
return;
if (RenderObject* o = parent()) {
if (o->isBlockFlow()) {
RenderBlock* cb = toRenderBlock(o);
if (cb->hasColumns())
cb->adjustRectForColumns(rect);
}
if (o->hasOverflowClip()) {
// o->height() is inaccurate if we're in the middle of a layout of |o|, so use the
// layer's size instead. Even if the layer's size is wrong, the layer itself will repaint
// anyway if its size does change.
RenderBox* boxParent = toRenderBox(o);
IntRect repaintRect(rect);
repaintRect.move(-boxParent->layer()->scrolledContentOffset()); // For overflow:auto/scroll/hidden.
IntRect boxRect(0, 0, boxParent->layer()->width(), boxParent->layer()->height());
rect = intersection(repaintRect, boxRect);
if (rect.isEmpty())
return;
}
o->computeRectForRepaint(repaintContainer, rect, fixed);
}
}
void RenderObject::dirtyLinesFromChangedChild(RenderObject*)
{
}
#ifndef NDEBUG
void RenderObject::showTreeForThis() const
{
if (node())
node()->showTreeForThis();
}
void RenderObject::showRenderObject() const
{
showRenderObject(0);
}
void RenderObject::showRenderObject(int printedCharacters) const
{
// As this function is intended to be used when debugging, the
// this pointer may be 0.
if (!this) {
fputs("(null)\n", stderr);
return;
}
printedCharacters += fprintf(stderr, "%s %p", renderName(), this);
if (node()) {
if (printedCharacters)
for (; printedCharacters < 39; printedCharacters++)
fputc(' ', stderr);
fputc('\t', stderr);
node()->showNode();
} else
fputc('\n', stderr);
}
void RenderObject::showRenderTreeAndMark(const RenderObject* markedObject1, const char* markedLabel1, const RenderObject* markedObject2, const char* markedLabel2, int depth) const
{
int printedCharacters = 0;
if (markedObject1 == this && markedLabel1)
printedCharacters += fprintf(stderr, "%s", markedLabel1);
if (markedObject2 == this && markedLabel2)
printedCharacters += fprintf(stderr, "%s", markedLabel2);
for (; printedCharacters < depth * 2; printedCharacters++)
fputc(' ', stderr);
showRenderObject(printedCharacters);
if (!this)
return;
for (const RenderObject* child = firstChild(); child; child = child->nextSibling())
child->showRenderTreeAndMark(markedObject1, markedLabel1, markedObject2, markedLabel2, depth + 1);
}
#endif // NDEBUG
Color RenderObject::selectionBackgroundColor() const
{
Color color;
if (style()->userSelect() != SELECT_NONE) {
RefPtr<RenderStyle> pseudoStyle = getUncachedPseudoStyle(SELECTION);
if (pseudoStyle && pseudoStyle->visitedDependentColor(CSSPropertyBackgroundColor).isValid())
color = pseudoStyle->visitedDependentColor(CSSPropertyBackgroundColor).blendWithWhite();
else
color = frame()->selection()->isFocusedAndActive() ?
theme()->activeSelectionBackgroundColor() :
theme()->inactiveSelectionBackgroundColor();
}
return color;
}
Color RenderObject::selectionColor(int colorProperty) const
{
Color color;
// If the element is unselectable, or we are only painting the selection,
// don't override the foreground color with the selection foreground color.
if (style()->userSelect() == SELECT_NONE
|| (frame()->view()->paintBehavior() & PaintBehaviorSelectionOnly))
return color;
if (RefPtr<RenderStyle> pseudoStyle = getUncachedPseudoStyle(SELECTION)) {
color = pseudoStyle->visitedDependentColor(colorProperty);
if (!color.isValid())
color = pseudoStyle->visitedDependentColor(CSSPropertyColor);
} else
color = frame()->selection()->isFocusedAndActive() ?
theme()->activeSelectionForegroundColor() :
theme()->inactiveSelectionForegroundColor();
return color;
}
Color RenderObject::selectionForegroundColor() const
{
return selectionColor(CSSPropertyWebkitTextFillColor);
}
Color RenderObject::selectionEmphasisMarkColor() const
{
return selectionColor(CSSPropertyWebkitTextEmphasisColor);
}
#if ENABLE(DRAG_SUPPORT)
Node* RenderObject::draggableNode(bool dhtmlOK, bool uaOK, int x, int y, bool& dhtmlWillDrag) const
{
if (!dhtmlOK && !uaOK)
return 0;
for (const RenderObject* curr = this; curr; curr = curr->parent()) {
Node* elt = curr->node();
if (elt && elt->nodeType() == Node::TEXT_NODE) {
// Since there's no way for the author to address the -webkit-user-drag style for a text node,
// we use our own judgement.
if (uaOK && view()->frameView()->frame()->eventHandler()->shouldDragAutoNode(curr->node(), IntPoint(x, y))) {
dhtmlWillDrag = false;
return curr->node();
}
if (elt->canStartSelection())
// In this case we have a click in the unselected portion of text. If this text is
// selectable, we want to start the selection process instead of looking for a parent
// to try to drag.
return 0;
} else {
EUserDrag dragMode = curr->style()->userDrag();
if (dhtmlOK && dragMode == DRAG_ELEMENT) {
dhtmlWillDrag = true;
return curr->node();
}
if (uaOK && dragMode == DRAG_AUTO
&& view()->frameView()->frame()->eventHandler()->shouldDragAutoNode(curr->node(), IntPoint(x, y))) {
dhtmlWillDrag = false;
return curr->node();
}
}
}
return 0;
}
#endif // ENABLE(DRAG_SUPPORT)
void RenderObject::selectionStartEnd(int& spos, int& epos) const
{
view()->selectionStartEnd(spos, epos);
}
void RenderObject::handleDynamicFloatPositionChange()
{
// We have gone from not affecting the inline status of the parent flow to suddenly
// having an impact. See if there is a mismatch between the parent flow's
// childrenInline() state and our state.
setInline(style()->isDisplayInlineType());
if (isInline() != parent()->childrenInline()) {
if (!isInline())
toRenderBoxModelObject(parent())->childBecameNonInline(this);
else {
// An anonymous block must be made to wrap this inline.
RenderBlock* block = toRenderBlock(parent())->createAnonymousBlock();
RenderObjectChildList* childlist = parent()->virtualChildren();
childlist->insertChildNode(parent(), block, this);
block->children()->appendChildNode(block, childlist->removeChildNode(parent(), this));
}
}
}
void RenderObject::setAnimatableStyle(PassRefPtr<RenderStyle> style)
{
if (!isText() && style)
setStyle(animation()->updateAnimations(this, style.get()));
else
setStyle(style);
}
StyleDifference RenderObject::adjustStyleDifference(StyleDifference diff, unsigned contextSensitiveProperties) const
{
#if USE(ACCELERATED_COMPOSITING)
// If transform changed, and we are not composited, need to do a layout.
if (contextSensitiveProperties & ContextSensitivePropertyTransform) {
// Text nodes share style with their parents but transforms don't apply to them,
// hence the !isText() check.
// FIXME: when transforms are taken into account for overflow, we will need to do a layout.
if (!isText() && (!hasLayer() || !toRenderBoxModelObject(this)->layer()->isComposited())) {
if (!hasLayer())
diff = StyleDifferenceLayout; // FIXME: Do this for now since SimplifiedLayout cannot handle updating floating objects lists.
else if (diff < StyleDifferenceSimplifiedLayout)
diff = StyleDifferenceSimplifiedLayout;
} else if (diff < StyleDifferenceRecompositeLayer)
diff = StyleDifferenceRecompositeLayer;
}
// If opacity changed, and we are not composited, need to repaint (also
// ignoring text nodes)
if (contextSensitiveProperties & ContextSensitivePropertyOpacity) {
if (!isText() && (!hasLayer() || !toRenderBoxModelObject(this)->layer()->isComposited()))
diff = StyleDifferenceRepaintLayer;
else if (diff < StyleDifferenceRecompositeLayer)
diff = StyleDifferenceRecompositeLayer;
}
// The answer to requiresLayer() for plugins and iframes can change outside of the style system,
// since it depends on whether we decide to composite these elements. When the layer status of
// one of these elements changes, we need to force a layout.
if (diff == StyleDifferenceEqual && style() && isBoxModelObject()) {
if (hasLayer() != toRenderBoxModelObject(this)->requiresLayer())
diff = StyleDifferenceLayout;
}
#else
UNUSED_PARAM(contextSensitiveProperties);
#endif
// If we have no layer(), just treat a RepaintLayer hint as a normal Repaint.
if (diff == StyleDifferenceRepaintLayer && !hasLayer())
diff = StyleDifferenceRepaint;
return diff;
}
void RenderObject::setStyle(PassRefPtr<RenderStyle> style)
{
if (m_style == style) {
#if USE(ACCELERATED_COMPOSITING)
// We need to run through adjustStyleDifference() for iframes and plugins, so
// style sharing is disabled for them. That should ensure that we never hit this code path.
ASSERT(!isRenderIFrame() && !isEmbeddedObject() &&!isApplet());
#endif
return;
}
StyleDifference diff = StyleDifferenceEqual;
unsigned contextSensitiveProperties = ContextSensitivePropertyNone;
if (m_style)
diff = m_style->diff(style.get(), contextSensitiveProperties);
diff = adjustStyleDifference(diff, contextSensitiveProperties);
styleWillChange(diff, style.get());
RefPtr<RenderStyle> oldStyle = m_style.release();
m_style = style;
updateFillImages(oldStyle ? oldStyle->backgroundLayers() : 0, m_style ? m_style->backgroundLayers() : 0);
updateFillImages(oldStyle ? oldStyle->maskLayers() : 0, m_style ? m_style->maskLayers() : 0);
updateImage(oldStyle ? oldStyle->borderImage().image() : 0, m_style ? m_style->borderImage().image() : 0);
updateImage(oldStyle ? oldStyle->maskBoxImage().image() : 0, m_style ? m_style->maskBoxImage().image() : 0);
// We need to ensure that view->maximalOutlineSize() is valid for any repaints that happen
// during styleDidChange (it's used by clippedOverflowRectForRepaint()).
if (m_style->outlineWidth() > 0 && m_style->outlineSize() > maximalOutlineSize(PaintPhaseOutline))
toRenderView(document()->renderer())->setMaximalOutlineSize(m_style->outlineSize());
styleDidChange(diff, oldStyle.get());
if (!m_parent || isText())
return;
// Now that the layer (if any) has been updated, we need to adjust the diff again,
// check whether we should layout now, and decide if we need to repaint.
StyleDifference updatedDiff = adjustStyleDifference(diff, contextSensitiveProperties);
if (diff <= StyleDifferenceLayoutPositionedMovementOnly) {
if (updatedDiff == StyleDifferenceLayout)
setNeedsLayoutAndPrefWidthsRecalc();
else if (updatedDiff == StyleDifferenceLayoutPositionedMovementOnly)
setNeedsPositionedMovementLayout();
else if (updatedDiff == StyleDifferenceSimplifiedLayout)
setNeedsSimplifiedNormalFlowLayout();
}
if (updatedDiff == StyleDifferenceRepaintLayer || updatedDiff == StyleDifferenceRepaint) {
// Do a repaint with the new style now, e.g., for example if we go from
// not having an outline to having an outline.
repaint();
}
}
void RenderObject::setStyleInternal(PassRefPtr<RenderStyle> style)
{
m_style = style;
}
void RenderObject::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)
{
if (m_style) {
// If our z-index changes value or our visibility changes,
// we need to dirty our stacking context's z-order list.
if (newStyle) {
#if ENABLE(COMPOSITED_FIXED_ELEMENTS)
RenderLayer* layer = hasLayer() ? enclosingLayer() : 0;
if (layer && m_style->position() != newStyle->position()
&& (m_style->position() == FixedPosition || newStyle->position() == FixedPosition))
layer->dirtyZOrderLists();
#endif
bool visibilityChanged = m_style->visibility() != newStyle->visibility()
|| m_style->zIndex() != newStyle->zIndex()
|| m_style->hasAutoZIndex() != newStyle->hasAutoZIndex();
#if ENABLE(DASHBOARD_SUPPORT)
if (visibilityChanged)
document()->setDashboardRegionsDirty(true);
#endif
if (visibilityChanged && AXObjectCache::accessibilityEnabled())
document()->axObjectCache()->childrenChanged(this);
// Keep layer hierarchy visibility bits up to date if visibility changes.
if (m_style->visibility() != newStyle->visibility()) {
if (RenderLayer* l = enclosingLayer()) {
if (newStyle->visibility() == VISIBLE)
l->setHasVisibleContent(true);
else if (l->hasVisibleContent() && (this == l->renderer() || l->renderer()->style()->visibility() != VISIBLE)) {
l->dirtyVisibleContentStatus();
if (diff > StyleDifferenceRepaintLayer)
repaint();
}
}
}
}
if (m_parent && (diff == StyleDifferenceRepaint || newStyle->outlineSize() < m_style->outlineSize()))
repaint();
if (isFloating() && (m_style->floating() != newStyle->floating()))
// For changes in float styles, we need to conceivably remove ourselves
// from the floating objects list.
toRenderBox(this)->removeFloatingOrPositionedChildFromBlockLists();
else if (isPositioned() && (m_style->position() != newStyle->position()))
// For changes in positioning styles, we need to conceivably remove ourselves
// from the positioned objects list.
toRenderBox(this)->removeFloatingOrPositionedChildFromBlockLists();
s_affectsParentBlock = isFloatingOrPositioned() &&
(!newStyle->isFloating() && newStyle->position() != AbsolutePosition && newStyle->position() != FixedPosition)
&& parent() && (parent()->isBlockFlow() || parent()->isRenderInline());
// reset style flags
if (diff == StyleDifferenceLayout || diff == StyleDifferenceLayoutPositionedMovementOnly) {
m_floating = false;
m_positioned = false;
m_relPositioned = false;
}
m_horizontalWritingMode = true;
m_paintBackground = false;
m_hasOverflowClip = false;
m_hasTransform = false;
m_hasReflection = false;
} else
s_affectsParentBlock = false;
if (view()->frameView()) {
bool shouldBlitOnFixedBackgroundImage = false;
#if ENABLE(FAST_MOBILE_SCROLLING)
// On low-powered/mobile devices, preventing blitting on a scroll can cause noticeable delays
// when scrolling a page with a fixed background image. As an optimization, assuming there are
// no fixed positoned elements on the page, we can acclerate scrolling (via blitting) if we
// ignore the CSS property "background-attachment: fixed".
shouldBlitOnFixedBackgroundImage = true;
#endif
bool newStyleSlowScroll = newStyle && !shouldBlitOnFixedBackgroundImage && newStyle->hasFixedBackgroundImage();
bool oldStyleSlowScroll = m_style && !shouldBlitOnFixedBackgroundImage && m_style->hasFixedBackgroundImage();
if (oldStyleSlowScroll != newStyleSlowScroll) {
if (oldStyleSlowScroll)
view()->frameView()->removeSlowRepaintObject();
if (newStyleSlowScroll)
view()->frameView()->addSlowRepaintObject();
}
}
}
static bool areNonIdenticalCursorListsEqual(const RenderStyle* a, const RenderStyle* b)
{
ASSERT(a->cursors() != b->cursors());
return a->cursors() && b->cursors() && *a->cursors() == *b->cursors();
}
static inline bool areCursorsEqual(const RenderStyle* a, const RenderStyle* b)
{
return a->cursor() == b->cursor() && (a->cursors() == b->cursors() || areNonIdenticalCursorListsEqual(a, b));
}
void RenderObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
if (s_affectsParentBlock)
handleDynamicFloatPositionChange();
if (!m_parent)
return;
if (diff == StyleDifferenceLayout || diff == StyleDifferenceSimplifiedLayout) {
RenderCounter::rendererStyleChanged(this, oldStyle, m_style.get());
// If the object already needs layout, then setNeedsLayout won't do
// any work. But if the containing block has changed, then we may need
// to mark the new containing blocks for layout. The change that can
// directly affect the containing block of this object is a change to
// the position style.
if (m_needsLayout && oldStyle->position() != m_style->position())
markContainingBlocksForLayout();
if (diff == StyleDifferenceLayout)
setNeedsLayoutAndPrefWidthsRecalc();
else
setNeedsSimplifiedNormalFlowLayout();
} else if (diff == StyleDifferenceLayoutPositionedMovementOnly)
setNeedsPositionedMovementLayout();
// Don't check for repaint here; we need to wait until the layer has been
// updated by subclasses before we know if we have to repaint (in setStyle()).
if (oldStyle && !areCursorsEqual(oldStyle, style())) {
if (Frame* frame = this->frame())
frame->eventHandler()->dispatchFakeMouseMoveEventSoon();
}
}
void RenderObject::propagateStyleToAnonymousChildren()
{
for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
if (child->isAnonymous() && !child->isBeforeOrAfterContent()) {
RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyle(style());
if (style()->specifiesColumns()) {
if (child->style()->specifiesColumns())
newStyle->inheritColumnPropertiesFrom(style());
if (child->style()->columnSpan())
newStyle->setColumnSpan(true);
}
newStyle->setDisplay(child->style()->display());
child->setStyle(newStyle.release());
}
}
}
void RenderObject::updateFillImages(const FillLayer* oldLayers, const FillLayer* newLayers)
{
// Optimize the common case
if (oldLayers && !oldLayers->next() && newLayers && !newLayers->next() && (oldLayers->image() == newLayers->image()))
return;
// Go through the new layers and addClients first, to avoid removing all clients of an image.
for (const FillLayer* currNew = newLayers; currNew; currNew = currNew->next()) {
if (currNew->image())
currNew->image()->addClient(this);
}
for (const FillLayer* currOld = oldLayers; currOld; currOld = currOld->next()) {
if (currOld->image())
currOld->image()->removeClient(this);
}
}
void RenderObject::updateImage(StyleImage* oldImage, StyleImage* newImage)
{
if (oldImage != newImage) {
if (oldImage)
oldImage->removeClient(this);
if (newImage)
newImage->addClient(this);
}
}
IntRect RenderObject::viewRect() const
{
return view()->viewRect();
}
FloatPoint RenderObject::localToAbsolute(const FloatPoint& localPoint, bool fixed, bool useTransforms) const
{
TransformState transformState(TransformState::ApplyTransformDirection, localPoint);
mapLocalToContainer(0, fixed, useTransforms, transformState);
transformState.flatten();
return transformState.lastPlanarPoint();
}
FloatPoint RenderObject::absoluteToLocal(const FloatPoint& containerPoint, bool fixed, bool useTransforms) const
{
TransformState transformState(TransformState::UnapplyInverseTransformDirection, containerPoint);
mapAbsoluteToLocalPoint(fixed, useTransforms, transformState);
transformState.flatten();
return transformState.lastPlanarPoint();
}
void RenderObject::mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed, bool useTransforms, TransformState& transformState) const
{
if (repaintContainer == this)
return;
RenderObject* o = parent();
if (!o)
return;
IntPoint centerPoint = roundedIntPoint(transformState.mappedPoint());
if (o->isBox() && o->style()->isFlippedBlocksWritingMode())
transformState.move(toRenderBox(o)->flipForWritingModeIncludingColumns(roundedIntPoint(transformState.mappedPoint())) - centerPoint);
IntSize columnOffset;
o->adjustForColumns(columnOffset, roundedIntPoint(transformState.mappedPoint()));
if (!columnOffset.isZero())
transformState.move(columnOffset);
if (o->hasOverflowClip())
transformState.move(-toRenderBox(o)->layer()->scrolledContentOffset());
o->mapLocalToContainer(repaintContainer, fixed, useTransforms, transformState);
}
void RenderObject::mapAbsoluteToLocalPoint(bool fixed, bool useTransforms, TransformState& transformState) const
{
RenderObject* o = parent();
if (o) {
o->mapAbsoluteToLocalPoint(fixed, useTransforms, transformState);
if (o->hasOverflowClip())
transformState.move(toRenderBox(o)->layer()->scrolledContentOffset());
}
}
bool RenderObject::shouldUseTransformFromContainer(const RenderObject* containerObject) const
{
#if ENABLE(3D_RENDERING)
// hasTransform() indicates whether the object has transform, transform-style or perspective. We just care about transform,
// so check the layer's transform directly.
return (hasLayer() && toRenderBoxModelObject(this)->layer()->transform()) || (containerObject && containerObject->style()->hasPerspective());
#else
UNUSED_PARAM(containerObject);
return hasTransform();
#endif
}
void RenderObject::getTransformFromContainer(const RenderObject* containerObject, const IntSize& offsetInContainer, TransformationMatrix& transform) const
{
transform.makeIdentity();
transform.translate(offsetInContainer.width(), offsetInContainer.height());
RenderLayer* layer;
if (hasLayer() && (layer = toRenderBoxModelObject(this)->layer()) && layer->transform())
transform.multiply(layer->currentTransform());
#if ENABLE(3D_RENDERING)
if (containerObject && containerObject->hasLayer() && containerObject->style()->hasPerspective()) {
// Perpsective on the container affects us, so we have to factor it in here.
ASSERT(containerObject->hasLayer());
FloatPoint perspectiveOrigin = toRenderBoxModelObject(containerObject)->layer()->perspectiveOrigin();
TransformationMatrix perspectiveMatrix;
perspectiveMatrix.applyPerspective(containerObject->style()->perspective());
transform.translateRight3d(-perspectiveOrigin.x(), -perspectiveOrigin.y(), 0);
transform = perspectiveMatrix * transform;
transform.translateRight3d(perspectiveOrigin.x(), perspectiveOrigin.y(), 0);
}
#else
UNUSED_PARAM(containerObject);
#endif
}
FloatQuad RenderObject::localToContainerQuad(const FloatQuad& localQuad, RenderBoxModelObject* repaintContainer, bool fixed) const
{
// Track the point at the center of the quad's bounding box. As mapLocalToContainer() calls offsetFromContainer(),
// it will use that point as the reference point to decide which column's transform to apply in multiple-column blocks.
TransformState transformState(TransformState::ApplyTransformDirection, localQuad.boundingBox().center(), &localQuad);
mapLocalToContainer(repaintContainer, fixed, true, transformState);
transformState.flatten();
return transformState.lastPlanarQuad();
}
IntSize RenderObject::offsetFromContainer(RenderObject* o, const IntPoint& point) const
{
ASSERT(o == container());
IntSize offset;
o->adjustForColumns(offset, point);
if (o->hasOverflowClip())
offset -= toRenderBox(o)->layer()->scrolledContentOffset();
return offset;
}
IntSize RenderObject::offsetFromAncestorContainer(RenderObject* container) const
{
IntSize offset;
IntPoint referencePoint;
const RenderObject* currContainer = this;
do {
RenderObject* nextContainer = currContainer->container();
ASSERT(nextContainer); // This means we reached the top without finding container.
if (!nextContainer)
break;
ASSERT(!currContainer->hasTransform());
IntSize currentOffset = currContainer->offsetFromContainer(nextContainer, referencePoint);
offset += currentOffset;
referencePoint.move(currentOffset);
currContainer = nextContainer;
} while (currContainer != container);
return offset;
}
IntRect RenderObject::localCaretRect(InlineBox*, int, int* extraWidthToEndOfLine)
{
if (extraWidthToEndOfLine)
*extraWidthToEndOfLine = 0;
return IntRect();
}
RenderView* RenderObject::view() const
{
return toRenderView(document()->renderer());
}
bool RenderObject::isRooted(RenderView** view)
{
RenderObject* o = this;
while (o->parent())
o = o->parent();
if (!o->isRenderView())
return false;
if (view)
*view = toRenderView(o);
return true;
}
bool RenderObject::hasOutlineAnnotation() const
{
return node() && node()->isLink() && document()->printing();
}
RenderObject* RenderObject::container(RenderBoxModelObject* repaintContainer, bool* repaintContainerSkipped) const
{
if (repaintContainerSkipped)
*repaintContainerSkipped = false;
// This method is extremely similar to containingBlock(), but with a few notable
// exceptions.
// (1) It can be used on orphaned subtrees, i.e., it can be called safely even when
// the object is not part of the primary document subtree yet.
// (2) For normal flow elements, it just returns the parent.
// (3) For absolute positioned elements, it will return a relative positioned inline.
// containingBlock() simply skips relpositioned inlines and lets an enclosing block handle
// the layout of the positioned object. This does mean that computePositionedLogicalWidth and
// computePositionedLogicalHeight have to use container().
RenderObject* o = parent();
if (isText())
return o;
EPosition pos = m_style->position();
if (pos == FixedPosition) {
// container() can be called on an object that is not in the
// tree yet. We don't call view() since it will assert if it
// can't get back to the canvas. Instead we just walk as high up
// as we can. If we're in the tree, we'll get the root. If we
// aren't we'll get the root of our little subtree (most likely
// we'll just return 0).
// FIXME: The definition of view() has changed to not crawl up the render tree. It might
// be safe now to use it.
while (o && o->parent() && !(o->hasTransform() && o->isRenderBlock())) {
if (repaintContainerSkipped && o == repaintContainer)
*repaintContainerSkipped = true;
o = o->parent();
}
} else if (pos == AbsolutePosition) {
// Same goes here. We technically just want our containing block, but
// we may not have one if we're part of an uninstalled subtree. We'll
// climb as high as we can though.
while (o && o->style()->position() == StaticPosition && !o->isRenderView() && !(o->hasTransform() && o->isRenderBlock())) {
if (repaintContainerSkipped && o == repaintContainer)
*repaintContainerSkipped = true;
#if ENABLE(SVG)
if (o->isSVGForeignObject()) // foreignObject is the containing block for contents inside it
break;
#endif
o = o->parent();
}
}
return o;
}
bool RenderObject::isSelectionBorder() const
{
SelectionState st = selectionState();
return st == SelectionStart || st == SelectionEnd || st == SelectionBoth;
}
void RenderObject::destroy()
{
// Destroy any leftover anonymous children.
RenderObjectChildList* children = virtualChildren();
if (children)
children->destroyLeftoverChildren();
// If this renderer is being autoscrolled, stop the autoscroll timer
// FIXME: RenderObject::destroy should not get called with a renderer whose document
// has a null frame, so we assert this. However, we don't want release builds to crash which is why we
// check that the frame is not null.
ASSERT(frame());
if (frame() && frame()->eventHandler()->autoscrollRenderer() == this)
frame()->eventHandler()->stopAutoscrollTimer(true);
if (AXObjectCache::accessibilityEnabled()) {
document()->axObjectCache()->childrenChanged(this->parent());
document()->axObjectCache()->remove(this);
}
animation()->cancelAnimations(this);
// By default no ref-counting. RenderWidget::destroy() doesn't call
// this function because it needs to do ref-counting. If anything
// in this function changes, be sure to fix RenderWidget::destroy() as well.
remove();
// If this renderer had a parent, remove should have destroyed any counters
// attached to this renderer and marked the affected other counters for
// reevaluation. This apparently redundant check is here for the case when
// this renderer had no parent at the time remove() was called.
if (m_hasCounterNodeMap)
RenderCounter::destroyCounterNodes(this);
// FIXME: Would like to do this in RenderBoxModelObject, but the timing is so complicated that this can't easily
// be moved into RenderBoxModelObject::destroy.
if (hasLayer()) {
setHasLayer(false);
toRenderBoxModelObject(this)->destroyLayer();
}
arenaDelete(renderArena(), this);
}
void RenderObject::arenaDelete(RenderArena* arena, void* base)
{
if (m_style) {
for (const FillLayer* bgLayer = m_style->backgroundLayers(); bgLayer; bgLayer = bgLayer->next()) {
if (StyleImage* backgroundImage = bgLayer->image())
backgroundImage->removeClient(this);
}
for (const FillLayer* maskLayer = m_style->maskLayers(); maskLayer; maskLayer = maskLayer->next()) {
if (StyleImage* maskImage = maskLayer->image())
maskImage->removeClient(this);
}
if (StyleImage* borderImage = m_style->borderImage().image())
borderImage->removeClient(this);
if (StyleImage* maskBoxImage = m_style->maskBoxImage().image())
maskBoxImage->removeClient(this);
}
#ifndef NDEBUG
void* savedBase = baseOfRenderObjectBeingDeleted;
baseOfRenderObjectBeingDeleted = base;
#endif
delete this;
#ifndef NDEBUG
baseOfRenderObjectBeingDeleted = savedBase;
#endif
// Recover the size left there for us by operator delete and free the memory.
arena->free(*(size_t*)base, base);
}
VisiblePosition RenderObject::positionForCoordinates(int x, int y)
{
return positionForPoint(IntPoint(x, y));
}
VisiblePosition RenderObject::positionForPoint(const IntPoint&)
{
return createVisiblePosition(caretMinOffset(), DOWNSTREAM);
}
void RenderObject::updateDragState(bool dragOn)
{
bool valueChanged = (dragOn != m_isDragging);
m_isDragging = dragOn;
if (valueChanged && style()->affectedByDragRules() && node())
node()->setNeedsStyleRecalc();
for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling())
curr->updateDragState(dragOn);
}
bool RenderObject::hitTest(const HitTestRequest& request, HitTestResult& result, const IntPoint& point, int tx, int ty, HitTestFilter hitTestFilter)
{
bool inside = false;
if (hitTestFilter != HitTestSelf) {
// First test the foreground layer (lines and inlines).
inside = nodeAtPoint(request, result, point.x(), point.y(), tx, ty, HitTestForeground);
// Test floats next.
if (!inside)
inside = nodeAtPoint(request, result, point.x(), point.y(), tx, ty, HitTestFloat);
// Finally test to see if the mouse is in the background (within a child block's background).
if (!inside)
inside = nodeAtPoint(request, result, point.x(), point.y(), tx, ty, HitTestChildBlockBackgrounds);
}
// See if the mouse is inside us but not any of our descendants
if (hitTestFilter != HitTestDescendants && !inside)
inside = nodeAtPoint(request, result, point.x(), point.y(), tx, ty, HitTestBlockBackground);
return inside;
}
void RenderObject::updateHitTestResult(HitTestResult& result, const IntPoint& point)
{
if (result.innerNode())
return;
Node* n = node();
if (n) {
result.setInnerNode(n);
if (!result.innerNonSharedNode())
result.setInnerNonSharedNode(n);
result.setLocalPoint(point);
}
}
bool RenderObject::nodeAtPoint(const HitTestRequest&, HitTestResult&, int /*x*/, int /*y*/, int /*tx*/, int /*ty*/, HitTestAction)
{
return false;
}
void RenderObject::scheduleRelayout()
{
if (isRenderView()) {
FrameView* view = toRenderView(this)->frameView();
if (view)
view->scheduleRelayout();
} else if (parent()) {
FrameView* v = view() ? view()->frameView() : 0;
if (v)
v->scheduleRelayoutOfSubtree(this);
}
}
void RenderObject::layout()
{
ASSERT(needsLayout());
RenderObject* child = firstChild();
while (child) {
child->layoutIfNeeded();
ASSERT(!child->needsLayout());
child = child->nextSibling();
}
setNeedsLayout(false);
}
PassRefPtr<RenderStyle> RenderObject::uncachedFirstLineStyle(RenderStyle* style) const
{
if (!document()->usesFirstLineRules())
return 0;
ASSERT(!isText());
RefPtr<RenderStyle> result;
if (isBlockFlow()) {
if (RenderBlock* firstLineBlock = this->firstLineBlock())
result = firstLineBlock->getUncachedPseudoStyle(FIRST_LINE, style, firstLineBlock == this ? style : 0);
} else if (!isAnonymous() && isRenderInline()) {
RenderStyle* parentStyle = parent()->firstLineStyle();
if (parentStyle != parent()->style())
result = getUncachedPseudoStyle(FIRST_LINE_INHERITED, parentStyle, style);
}
return result.release();
}
RenderStyle* RenderObject::firstLineStyleSlowCase() const
{
ASSERT(document()->usesFirstLineRules());
RenderStyle* style = m_style.get();
const RenderObject* renderer = isText() ? parent() : this;
if (renderer->isBlockFlow()) {
if (RenderBlock* firstLineBlock = renderer->firstLineBlock())
style = firstLineBlock->getCachedPseudoStyle(FIRST_LINE, style);
} else if (!renderer->isAnonymous() && renderer->isRenderInline()) {
RenderStyle* parentStyle = renderer->parent()->firstLineStyle();
if (parentStyle != renderer->parent()->style()) {
// A first-line style is in effect. Cache a first-line style for ourselves.
renderer->style()->setHasPseudoStyle(FIRST_LINE_INHERITED);
style = renderer->getCachedPseudoStyle(FIRST_LINE_INHERITED, parentStyle);
}
}
return style;
}
RenderStyle* RenderObject::getCachedPseudoStyle(PseudoId pseudo, RenderStyle* parentStyle) const
{
if (pseudo < FIRST_INTERNAL_PSEUDOID && !style()->hasPseudoStyle(pseudo))
return 0;
RenderStyle* cachedStyle = style()->getCachedPseudoStyle(pseudo);
if (cachedStyle)
return cachedStyle;
RefPtr<RenderStyle> result = getUncachedPseudoStyle(pseudo, parentStyle);
if (result)
return style()->addCachedPseudoStyle(result.release());
return 0;
}
PassRefPtr<RenderStyle> RenderObject::getUncachedPseudoStyle(PseudoId pseudo, RenderStyle* parentStyle, RenderStyle* ownStyle) const
{
if (pseudo < FIRST_INTERNAL_PSEUDOID && !ownStyle && !style()->hasPseudoStyle(pseudo))
return 0;
if (!parentStyle) {
ASSERT(!ownStyle);
parentStyle = style();
}
Node* n = node();
while (n && !n->isElementNode())
n = n->parentNode();
if (!n)
return 0;
RefPtr<RenderStyle> result;
if (pseudo == FIRST_LINE_INHERITED) {
result = document()->styleSelector()->styleForElement(static_cast<Element*>(n), parentStyle, false);
result->setStyleType(FIRST_LINE_INHERITED);
} else
result = document()->styleSelector()->pseudoStyleForElement(pseudo, static_cast<Element*>(n), parentStyle);
return result.release();
}
static Color decorationColor(RenderObject* renderer)
{
Color result;
if (renderer->style()->textStrokeWidth() > 0) {
// Prefer stroke color if possible but not if it's fully transparent.
result = renderer->style()->visitedDependentColor(CSSPropertyWebkitTextStrokeColor);
if (result.alpha())
return result;
}
result = renderer->style()->visitedDependentColor(CSSPropertyWebkitTextFillColor);
return result;
}
void RenderObject::getTextDecorationColors(int decorations, Color& underline, Color& overline,
Color& linethrough, bool quirksMode)
{
RenderObject* curr = this;
do {
int currDecs = curr->style()->textDecoration();
if (currDecs) {
if (currDecs & UNDERLINE) {
decorations &= ~UNDERLINE;
underline = decorationColor(curr);
}
if (currDecs & OVERLINE) {
decorations &= ~OVERLINE;
overline = decorationColor(curr);
}
if (currDecs & LINE_THROUGH) {
decorations &= ~LINE_THROUGH;
linethrough = decorationColor(curr);
}
}
curr = curr->parent();
if (curr && curr->isAnonymousBlock() && toRenderBlock(curr)->continuation())
curr = toRenderBlock(curr)->continuation();
} while (curr && decorations && (!quirksMode || !curr->node() ||
(!curr->node()->hasTagName(aTag) && !curr->node()->hasTagName(fontTag))));
// If we bailed out, use the element we bailed out at (typically a <font> or <a> element).
if (decorations && curr) {
if (decorations & UNDERLINE)
underline = decorationColor(curr);
if (decorations & OVERLINE)
overline = decorationColor(curr);
if (decorations & LINE_THROUGH)
linethrough = decorationColor(curr);
}
}
#if ENABLE(DASHBOARD_SUPPORT)
void RenderObject::addDashboardRegions(Vector<DashboardRegionValue>& regions)
{
// Convert the style regions to absolute coordinates.
if (style()->visibility() != VISIBLE || !isBox())
return;
RenderBox* box = toRenderBox(this);
const Vector<StyleDashboardRegion>& styleRegions = style()->dashboardRegions();
unsigned i, count = styleRegions.size();
for (i = 0; i < count; i++) {
StyleDashboardRegion styleRegion = styleRegions[i];
int w = box->width();
int h = box->height();
DashboardRegionValue region;
region.label = styleRegion.label;
region.bounds = IntRect(styleRegion.offset.left().value(),
styleRegion.offset.top().value(),
w - styleRegion.offset.left().value() - styleRegion.offset.right().value(),
h - styleRegion.offset.top().value() - styleRegion.offset.bottom().value());
region.type = styleRegion.type;
region.clip = region.bounds;
computeAbsoluteRepaintRect(region.clip);
if (region.clip.height() < 0) {
region.clip.setHeight(0);
region.clip.setWidth(0);
}
FloatPoint absPos = localToAbsolute();
region.bounds.setX(absPos.x() + styleRegion.offset.left().value());
region.bounds.setY(absPos.y() + styleRegion.offset.top().value());
if (frame()) {
float pageScaleFactor = frame()->page()->chrome()->scaleFactor();
if (pageScaleFactor != 1.0f) {
region.bounds.scale(pageScaleFactor);
region.clip.scale(pageScaleFactor);
}
}
regions.append(region);
}
}
void RenderObject::collectDashboardRegions(Vector<DashboardRegionValue>& regions)
{
// RenderTexts don't have their own style, they just use their parent's style,
// so we don't want to include them.
if (isText())
return;
addDashboardRegions(regions);
for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling())
curr->collectDashboardRegions(regions);
}
#endif
bool RenderObject::willRenderImage(CachedImage*)
{
// Without visibility we won't render (and therefore don't care about animation).
if (style()->visibility() != VISIBLE)
return false;
// If we're not in a window (i.e., we're dormant from being put in the b/f cache or in a background tab)
// then we don't want to render either.
return !document()->inPageCache() && !document()->view()->isOffscreen();
}
int RenderObject::maximalOutlineSize(PaintPhase p) const
{
if (p != PaintPhaseOutline && p != PaintPhaseSelfOutline && p != PaintPhaseChildOutlines)
return 0;
return toRenderView(document()->renderer())->maximalOutlineSize();
}
int RenderObject::caretMinOffset() const
{
return 0;
}
int RenderObject::caretMaxOffset() const
{
if (isReplaced())
return node() ? max(1U, node()->childNodeCount()) : 1;
if (isHR())
return 1;
return 0;
}
unsigned RenderObject::caretMaxRenderedOffset() const
{
return 0;
}
int RenderObject::previousOffset(int current) const
{
return current - 1;
}
int RenderObject::previousOffsetForBackwardDeletion(int current) const
{
return current - 1;
}
int RenderObject::nextOffset(int current) const
{
return current + 1;
}
void RenderObject::adjustRectForOutlineAndShadow(IntRect& rect) const
{
int outlineSize = outlineStyleForRepaint()->outlineSize();
if (const ShadowData* boxShadow = style()->boxShadow()) {
boxShadow->adjustRectForShadow(rect, outlineSize);
return;
}
rect.inflate(outlineSize);
}
AnimationController* RenderObject::animation() const
{
return frame()->animation();
}
void RenderObject::imageChanged(CachedImage* image, const IntRect* rect)
{
imageChanged(static_cast<WrappedImagePtr>(image), rect);
}
RenderBoxModelObject* RenderObject::offsetParent() const
{
// If any of the following holds true return null and stop this algorithm:
// A is the root element.
// A is the HTML body element.
// The computed value of the position property for element A is fixed.
if (isRoot() || isBody() || (isPositioned() && style()->position() == FixedPosition))
return 0;
// If A is an area HTML element which has a map HTML element somewhere in the ancestor
// chain return the nearest ancestor map HTML element and stop this algorithm.
// FIXME: Implement!
// Return the nearest ancestor element of A for which at least one of the following is
// true and stop this algorithm if such an ancestor is found:
// * The computed value of the position property is not static.
// * It is the HTML body element.
// * The computed value of the position property of A is static and the ancestor
// is one of the following HTML elements: td, th, or table.
// * Our own extension: if there is a difference in the effective zoom
bool skipTables = isPositioned() || isRelPositioned();
float currZoom = style()->effectiveZoom();
RenderObject* curr = parent();
while (curr && (!curr->node() || (!curr->isPositioned() && !curr->isRelPositioned() && !curr->isBody()))) {
Node* element = curr->node();
if (!skipTables && element) {
bool isTableElement = element->hasTagName(tableTag) ||
element->hasTagName(tdTag) ||
element->hasTagName(thTag);
#if ENABLE(WML)
if (!isTableElement && element->isWMLElement())
isTableElement = element->hasTagName(WMLNames::tableTag) ||
element->hasTagName(WMLNames::tdTag);
#endif
if (isTableElement)
break;
}
float newZoom = curr->style()->effectiveZoom();
if (currZoom != newZoom)
break;
currZoom = newZoom;
curr = curr->parent();
}
return curr && curr->isBoxModelObject() ? toRenderBoxModelObject(curr) : 0;
}
VisiblePosition RenderObject::createVisiblePosition(int offset, EAffinity affinity)
{
// If this is a non-anonymous renderer in an editable area, then it's simple.
if (Node* node = this->node()) {
if (!node->rendererIsEditable()) {
// If it can be found, we prefer a visually equivalent position that is editable.
Position position(node, offset);
Position candidate = position.downstream(CanCrossEditingBoundary);
if (candidate.deprecatedNode()->rendererIsEditable())
return VisiblePosition(candidate, affinity);
candidate = position.upstream(CanCrossEditingBoundary);
if (candidate.deprecatedNode()->rendererIsEditable())
return VisiblePosition(candidate, affinity);
}
// FIXME: Eliminate legacy editing positions
return VisiblePosition(Position(node, offset), affinity);
}
// We don't want to cross the boundary between editable and non-editable
// regions of the document, but that is either impossible or at least
// extremely unlikely in any normal case because we stop as soon as we
// find a single non-anonymous renderer.
// Find a nearby non-anonymous renderer.
RenderObject* child = this;
while (RenderObject* parent = child->parent()) {
// Find non-anonymous content after.
RenderObject* renderer = child;
while ((renderer = renderer->nextInPreOrder(parent))) {
if (Node* node = renderer->node())
return VisiblePosition(firstPositionInOrBeforeNode(node), DOWNSTREAM);
}
// Find non-anonymous content before.
renderer = child;
while ((renderer = renderer->previousInPreOrder())) {
if (renderer == parent)
break;
if (Node* node = renderer->node())
return VisiblePosition(lastPositionInOrAfterNode(node), DOWNSTREAM);
}
// Use the parent itself unless it too is anonymous.
if (Node* node = parent->node())
return VisiblePosition(firstPositionInOrBeforeNode(node), DOWNSTREAM);
// Repeat at the next level up.
child = parent;
}
// Everything was anonymous. Give up.
return VisiblePosition();
}
VisiblePosition RenderObject::createVisiblePosition(const Position& position)
{
if (position.isNotNull())
return VisiblePosition(position);
ASSERT(!node());
return createVisiblePosition(0, DOWNSTREAM);
}
#if ENABLE(SVG)
RenderSVGResourceContainer* RenderObject::toRenderSVGResourceContainer()
{
ASSERT_NOT_REACHED();
return 0;
}
void RenderObject::setNeedsBoundariesUpdate()
{
if (RenderObject* renderer = parent())
renderer->setNeedsBoundariesUpdate();
}
FloatRect RenderObject::objectBoundingBox() const
{
ASSERT_NOT_REACHED();
return FloatRect();
}
FloatRect RenderObject::strokeBoundingBox() const
{
ASSERT_NOT_REACHED();
return FloatRect();
}
// Returns the smallest rectangle enclosing all of the painted content
// respecting clipping, masking, filters, opacity, stroke-width and markers
FloatRect RenderObject::repaintRectInLocalCoordinates() const
{
ASSERT_NOT_REACHED();
return FloatRect();
}
AffineTransform RenderObject::localTransform() const
{
static const AffineTransform identity;
return identity;
}
const AffineTransform& RenderObject::localToParentTransform() const
{
static const AffineTransform identity;
return identity;
}
bool RenderObject::nodeAtFloatPoint(const HitTestRequest&, HitTestResult&, const FloatPoint&, HitTestAction)
{
ASSERT_NOT_REACHED();
return false;
}
#endif // ENABLE(SVG)
} // namespace WebCore
#ifndef NDEBUG
void showTree(const WebCore::RenderObject* ro)
{
if (ro)
ro->showTreeForThis();
}
void showRenderTree(const WebCore::RenderObject* object1)
{
showRenderTree(object1, 0);
}
void showRenderTree(const WebCore::RenderObject* object1, const WebCore::RenderObject* object2)
{
if (object1) {
const WebCore::RenderObject* root = object1;
while (root->parent())
root = root->parent();
root->showRenderTreeAndMark(object1, "*", object2, "-", 0);
}
}
#endif