1 /*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 * (C) 2000 Antti Koivisto (koivisto@kde.org)
4 * (C) 2000 Dirk Mueller (mueller@kde.org)
5 * (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
6 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
7 * Copyright (C) 2009 Google Inc. All rights reserved.
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
18 *
19 * You should have received a copy of the GNU Library General Public License
20 * along with this library; see the file COPYING.LIB. If not, write to
21 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
23 *
24 */
25
26 #ifndef RenderObject_h
27 #define RenderObject_h
28
29 #include "CachedResourceClient.h"
30 #include "Document.h"
31 #include "Element.h"
32 #include "FloatQuad.h"
33 #include "PaintPhase.h"
34 #include "RenderObjectChildList.h"
35 #include "RenderStyle.h"
36 #include "TextAffinity.h"
37 #include "TransformationMatrix.h"
38 #include <wtf/UnusedParam.h>
39
40 #if USE(CG) || USE(CAIRO) || PLATFORM(QT)
41 #define HAVE_PATH_BASED_BORDER_RADIUS_DRAWING 1
42 #endif
43
44 namespace WebCore {
45
46 class AffineTransform;
47 class AnimationController;
48 class HitTestResult;
49 class InlineBox;
50 class InlineFlowBox;
51 class OverlapTestRequestClient;
52 class Path;
53 class Position;
54 class RenderBoxModelObject;
55 class RenderInline;
56 class RenderBlock;
57 class RenderFlow;
58 class RenderLayer;
59 class RenderTheme;
60 class TransformState;
61 class VisiblePosition;
62 #if ENABLE(SVG)
63 class RenderSVGResourceContainer;
64 #endif
65
66 struct PaintInfo;
67
68 enum HitTestFilter {
69 HitTestAll,
70 HitTestSelf,
71 HitTestDescendants
72 };
73
74 enum HitTestAction {
75 HitTestBlockBackground,
76 HitTestChildBlockBackground,
77 HitTestChildBlockBackgrounds,
78 HitTestFloat,
79 HitTestForeground
80 };
81
82 // Sides used when drawing borders and outlines. The values should run clockwise from top.
83 enum BoxSide {
84 BSTop,
85 BSRight,
86 BSBottom,
87 BSLeft
88 };
89
90 const int caretWidth = 1;
91
92 #if ENABLE(DASHBOARD_SUPPORT)
93 struct DashboardRegionValue {
94 bool operator==(const DashboardRegionValue& o) const
95 {
96 return type == o.type && bounds == o.bounds && clip == o.clip && label == o.label;
97 }
98 bool operator!=(const DashboardRegionValue& o) const
99 {
100 return !(*this == o);
101 }
102
103 String label;
104 IntRect bounds;
105 IntRect clip;
106 int type;
107 };
108 #endif
109
110 // Base class for all rendering tree objects.
111 class RenderObject : public CachedResourceClient {
112 friend class RenderBlock;
113 friend class RenderBox;
114 friend class RenderLayer;
115 friend class RenderObjectChildList;
116 friend class RenderSVGContainer;
117 public:
118 // Anonymous objects should pass the document as their node, and they will then automatically be
119 // marked as anonymous in the constructor.
120 RenderObject(Node*);
121 virtual ~RenderObject();
122
123 RenderTheme* theme() const;
124
125 virtual const char* renderName() const = 0;
126
parent()127 RenderObject* parent() const { return m_parent; }
128 bool isDescendantOf(const RenderObject*) const;
129
previousSibling()130 RenderObject* previousSibling() const { return m_previous; }
nextSibling()131 RenderObject* nextSibling() const { return m_next; }
132
firstChild()133 RenderObject* firstChild() const
134 {
135 if (const RenderObjectChildList* children = virtualChildren())
136 return children->firstChild();
137 return 0;
138 }
lastChild()139 RenderObject* lastChild() const
140 {
141 if (const RenderObjectChildList* children = virtualChildren())
142 return children->lastChild();
143 return 0;
144 }
beforePseudoElementRenderer()145 RenderObject* beforePseudoElementRenderer() const
146 {
147 if (const RenderObjectChildList* children = virtualChildren())
148 return children->beforePseudoElementRenderer(this);
149 return 0;
150 }
afterPseudoElementRenderer()151 RenderObject* afterPseudoElementRenderer() const
152 {
153 if (const RenderObjectChildList* children = virtualChildren())
154 return children->afterPseudoElementRenderer(this);
155 return 0;
156 }
virtualChildren()157 virtual RenderObjectChildList* virtualChildren() { return 0; }
virtualChildren()158 virtual const RenderObjectChildList* virtualChildren() const { return 0; }
159
160 RenderObject* nextInPreOrder() const;
161 RenderObject* nextInPreOrder(const RenderObject* stayWithin) const;
162 RenderObject* nextInPreOrderAfterChildren() const;
163 RenderObject* nextInPreOrderAfterChildren(const RenderObject* stayWithin) const;
164 RenderObject* previousInPreOrder() const;
165 RenderObject* childAt(unsigned) const;
166
167 RenderObject* firstLeafChild() const;
168 RenderObject* lastLeafChild() const;
169
170 // The following six functions are used when the render tree hierarchy changes to make sure layers get
171 // properly added and removed. Since containership can be implemented by any subclass, and since a hierarchy
172 // can contain a mixture of boxes and other object types, these functions need to be in the base class.
173 RenderLayer* enclosingLayer() const;
174 void addLayers(RenderLayer* parentLayer, RenderObject* newObject);
175 void removeLayers(RenderLayer* parentLayer);
176 void moveLayers(RenderLayer* oldParent, RenderLayer* newParent);
177 RenderLayer* findNextLayer(RenderLayer* parentLayer, RenderObject* startPoint, bool checkParent = true);
178
179 // Convenience function for getting to the nearest enclosing box of a RenderObject.
180 RenderBox* enclosingBox() const;
181 RenderBoxModelObject* enclosingBoxModelObject() const;
182
isEmpty()183 virtual bool isEmpty() const { return firstChild() == 0; }
184
185 #ifndef NDEBUG
setHasAXObject(bool flag)186 void setHasAXObject(bool flag) { m_hasAXObject = flag; }
hasAXObject()187 bool hasAXObject() const { return m_hasAXObject; }
isSetNeedsLayoutForbidden()188 bool isSetNeedsLayoutForbidden() const { return m_setNeedsLayoutForbidden; }
setNeedsLayoutIsForbidden(bool flag)189 void setNeedsLayoutIsForbidden(bool flag) { m_setNeedsLayoutForbidden = flag; }
190 #endif
191
192 // Obtains the nearest enclosing block (including this block) that contributes a first-line style to our inline
193 // children.
194 virtual RenderBlock* firstLineBlock() const;
195
196 // Called when an object that was floating or positioned becomes a normal flow object
197 // again. We have to make sure the render tree updates as needed to accommodate the new
198 // normal flow object.
199 void handleDynamicFloatPositionChange();
200
201 // RenderObject tree manipulation
202 //////////////////////////////////////////
canHaveChildren()203 virtual bool canHaveChildren() const { return virtualChildren(); }
isChildAllowed(RenderObject *,RenderStyle *)204 virtual bool isChildAllowed(RenderObject*, RenderStyle*) const { return true; }
205 virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0);
206 virtual void addChildIgnoringContinuation(RenderObject* newChild, RenderObject* beforeChild = 0) { return addChild(newChild, beforeChild); }
207 virtual void removeChild(RenderObject*);
createsAnonymousWrapper()208 virtual bool createsAnonymousWrapper() const { return false; }
209 //////////////////////////////////////////
210
211 protected:
212 //////////////////////////////////////////
213 // Helper functions. Dangerous to use!
setPreviousSibling(RenderObject * previous)214 void setPreviousSibling(RenderObject* previous) { m_previous = previous; }
setNextSibling(RenderObject * next)215 void setNextSibling(RenderObject* next) { m_next = next; }
setParent(RenderObject * parent)216 void setParent(RenderObject* parent) { m_parent = parent; }
217 //////////////////////////////////////////
218 private:
219 void addAbsoluteRectForLayer(IntRect& result);
220 void setLayerNeedsFullRepaint();
221
222 public:
223 #ifndef NDEBUG
224 void showTreeForThis() const;
225
226 void showRenderObject() const;
227 // We don't make printedCharacters an optional parameter so that
228 // showRenderObject can be called from gdb easily.
229 void showRenderObject(int printedCharacters) const;
230 void showRenderTreeAndMark(const RenderObject* markedObject1 = 0, const char* markedLabel1 = 0, const RenderObject* markedObject2 = 0, const char* markedLabel2 = 0, int depth = 0) const;
231 #endif
232
233 static RenderObject* createObject(Node*, RenderStyle*);
234
235 // Overloaded new operator. Derived classes must override operator new
236 // in order to allocate out of the RenderArena.
237 void* operator new(size_t, RenderArena*) throw();
238
239 // Overridden to prevent the normal delete from being called.
240 void operator delete(void*, size_t);
241
242 private:
243 // The normal operator new is disallowed on all render objects.
244 void* operator new(size_t) throw();
245
246 public:
renderArena()247 RenderArena* renderArena() const { return document()->renderArena(); }
248
isApplet()249 virtual bool isApplet() const { return false; }
isBR()250 virtual bool isBR() const { return false; }
isBlockFlow()251 virtual bool isBlockFlow() const { return false; }
isBoxModelObject()252 virtual bool isBoxModelObject() const { return false; }
isCounter()253 virtual bool isCounter() const { return false; }
isQuote()254 virtual bool isQuote() const { return false; }
isDetails()255 virtual bool isDetails() const { return false; }
isDetailsMarker()256 virtual bool isDetailsMarker() const { return false; }
isEmbeddedObject()257 virtual bool isEmbeddedObject() const { return false; }
isFieldset()258 virtual bool isFieldset() const { return false; }
isFileUploadControl()259 virtual bool isFileUploadControl() const { return false; }
isFrame()260 virtual bool isFrame() const { return false; }
isFrameSet()261 virtual bool isFrameSet() const { return false; }
isImage()262 virtual bool isImage() const { return false; }
isInlineBlockOrInlineTable()263 virtual bool isInlineBlockOrInlineTable() const { return false; }
isListBox()264 virtual bool isListBox() const { return false; }
isListItem()265 virtual bool isListItem() const { return false; }
isListMarker()266 virtual bool isListMarker() const { return false; }
isMedia()267 virtual bool isMedia() const { return false; }
isMenuList()268 virtual bool isMenuList() const { return false; }
269 #if ENABLE(METER_TAG)
isMeter()270 virtual bool isMeter() const { return false; }
271 #endif
272 #if ENABLE(PROGRESS_TAG)
isProgress()273 virtual bool isProgress() const { return false; }
274 #endif
isRenderBlock()275 virtual bool isRenderBlock() const { return false; }
isRenderButton()276 virtual bool isRenderButton() const { return false; }
isRenderIFrame()277 virtual bool isRenderIFrame() const { return false; }
isRenderImage()278 virtual bool isRenderImage() const { return false; }
isRenderInline()279 virtual bool isRenderInline() const { return false; }
isRenderPart()280 virtual bool isRenderPart() const { return false; }
isRenderView()281 virtual bool isRenderView() const { return false; }
isReplica()282 virtual bool isReplica() const { return false; }
283
isRuby()284 virtual bool isRuby() const { return false; }
isRubyBase()285 virtual bool isRubyBase() const { return false; }
isRubyRun()286 virtual bool isRubyRun() const { return false; }
isRubyText()287 virtual bool isRubyText() const { return false; }
288
isSlider()289 virtual bool isSlider() const { return false; }
isSummary()290 virtual bool isSummary() const { return false; }
isTable()291 virtual bool isTable() const { return false; }
isTableCell()292 virtual bool isTableCell() const { return false; }
isTableCol()293 virtual bool isTableCol() const { return false; }
isTableRow()294 virtual bool isTableRow() const { return false; }
isTableSection()295 virtual bool isTableSection() const { return false; }
isTextControl()296 virtual bool isTextControl() const { return false; }
isTextArea()297 virtual bool isTextArea() const { return false; }
isTextField()298 virtual bool isTextField() const { return false; }
isVideo()299 virtual bool isVideo() const { return false; }
isWidget()300 virtual bool isWidget() const { return false; }
isCanvas()301 virtual bool isCanvas() const { return false; }
302 #if ENABLE(FULLSCREEN_API)
isRenderFullScreen()303 virtual bool isRenderFullScreen() const { return false; }
304 #endif
305
isRoot()306 bool isRoot() const { return document()->documentElement() == m_node; }
307 bool isBody() const;
308 bool isHR() const;
309 bool isLegend() const;
310
311 bool isHTMLMarquee() const;
312
313 inline bool isBeforeContent() const;
314 inline bool isAfterContent() const;
315 inline bool isBeforeOrAfterContent() const;
isBeforeContent(const RenderObject * obj)316 static inline bool isBeforeContent(const RenderObject* obj) { return obj && obj->isBeforeContent(); }
isAfterContent(const RenderObject * obj)317 static inline bool isAfterContent(const RenderObject* obj) { return obj && obj->isAfterContent(); }
isBeforeOrAfterContent(const RenderObject * obj)318 static inline bool isBeforeOrAfterContent(const RenderObject* obj) { return obj && obj->isBeforeOrAfterContent(); }
319
childrenInline()320 bool childrenInline() const { return m_childrenInline; }
321 void setChildrenInline(bool b = true) { m_childrenInline = b; }
hasColumns()322 bool hasColumns() const { return m_hasColumns; }
323 void setHasColumns(bool b = true) { m_hasColumns = b; }
324
requiresForcedStyleRecalcPropagation()325 virtual bool requiresForcedStyleRecalcPropagation() const { return false; }
326
327 #if ENABLE(MATHML)
isRenderMathMLBlock()328 virtual bool isRenderMathMLBlock() const { return false; }
329 #endif // ENABLE(MATHML)
330
331 #if ENABLE(SVG)
332 // FIXME: Until all SVG renders can be subclasses of RenderSVGModelObject we have
333 // to add SVG renderer methods to RenderObject with an ASSERT_NOT_REACHED() default implementation.
isSVGRoot()334 virtual bool isSVGRoot() const { return false; }
isSVGContainer()335 virtual bool isSVGContainer() const { return false; }
isSVGViewportContainer()336 virtual bool isSVGViewportContainer() const { return false; }
isSVGGradientStop()337 virtual bool isSVGGradientStop() const { return false; }
isSVGHiddenContainer()338 virtual bool isSVGHiddenContainer() const { return false; }
isSVGPath()339 virtual bool isSVGPath() const { return false; }
isSVGText()340 virtual bool isSVGText() const { return false; }
isSVGTextPath()341 virtual bool isSVGTextPath() const { return false; }
isSVGInline()342 virtual bool isSVGInline() const { return false; }
isSVGInlineText()343 virtual bool isSVGInlineText() const { return false; }
isSVGImage()344 virtual bool isSVGImage() const { return false; }
isSVGForeignObject()345 virtual bool isSVGForeignObject() const { return false; }
isSVGResourceContainer()346 virtual bool isSVGResourceContainer() const { return false; }
isSVGResourceFilter()347 virtual bool isSVGResourceFilter() const { return false; }
isSVGResourceFilterPrimitive()348 virtual bool isSVGResourceFilterPrimitive() const { return false; }
isSVGShadowTreeRootContainer()349 virtual bool isSVGShadowTreeRootContainer() const { return false; }
350
351 virtual RenderSVGResourceContainer* toRenderSVGResourceContainer();
352
353 // FIXME: Those belong into a SVG specific base-class for all renderers (see above)
354 // Unfortunately we don't have such a class yet, because it's not possible for all renderers
355 // to inherit from RenderSVGObject -> RenderObject (some need RenderBlock inheritance for instance)
setNeedsTransformUpdate()356 virtual void setNeedsTransformUpdate() { }
357 virtual void setNeedsBoundariesUpdate();
358
359 // Per SVG 1.1 objectBoundingBox ignores clipping, masking, filter effects, opacity and stroke-width.
360 // This is used for all computation of objectBoundingBox relative units and by SVGLocateable::getBBox().
361 // NOTE: Markers are not specifically ignored here by SVG 1.1 spec, but we ignore them
362 // since stroke-width is ignored (and marker size can depend on stroke-width).
363 // objectBoundingBox is returned local coordinates.
364 // The name objectBoundingBox is taken from the SVG 1.1 spec.
365 virtual FloatRect objectBoundingBox() const;
366 virtual FloatRect strokeBoundingBox() const;
367
368 // Returns the smallest rectangle enclosing all of the painted content
369 // respecting clipping, masking, filters, opacity, stroke-width and markers
370 virtual FloatRect repaintRectInLocalCoordinates() const;
371
372 // This only returns the transform="" value from the element
373 // most callsites want localToParentTransform() instead.
374 virtual AffineTransform localTransform() const;
375
376 // Returns the full transform mapping from local coordinates to local coords for the parent SVG renderer
377 // This includes any viewport transforms and x/y offsets as well as the transform="" value off the element.
378 virtual const AffineTransform& localToParentTransform() const;
379
380 // SVG uses FloatPoint precise hit testing, and passes the point in parent
381 // coordinates instead of in repaint container coordinates. Eventually the
382 // rest of the rendering tree will move to a similar model.
383 virtual bool nodeAtFloatPoint(const HitTestRequest&, HitTestResult&, const FloatPoint& pointInParent, HitTestAction);
384 #endif
385
isAnonymous()386 bool isAnonymous() const { return m_isAnonymous; }
setIsAnonymous(bool b)387 void setIsAnonymous(bool b) { m_isAnonymous = b; }
isAnonymousBlock()388 bool isAnonymousBlock() const
389 {
390 // This function is kept in sync with anonymous block creation conditions in
391 // RenderBlock::createAnonymousBlock(). This includes creating an anonymous
392 // RenderBlock having a BLOCK or BOX display. Other classes such as RenderTextFragment
393 // are not RenderBlocks and will return false. See https://bugs.webkit.org/show_bug.cgi?id=56709.
394 return m_isAnonymous && (style()->display() == BLOCK || style()->display() == BOX) && style()->styleType() == NOPSEUDO && isRenderBlock() && !isListMarker();
395 }
isAnonymousColumnsBlock()396 bool isAnonymousColumnsBlock() const { return style()->specifiesColumns() && isAnonymousBlock(); }
isAnonymousColumnSpanBlock()397 bool isAnonymousColumnSpanBlock() const { return style()->columnSpan() && isAnonymousBlock(); }
isElementContinuation()398 bool isElementContinuation() const { return node() && node()->renderer() != this; }
isInlineElementContinuation()399 bool isInlineElementContinuation() const { return isElementContinuation() && isInline(); }
isBlockElementContinuation()400 bool isBlockElementContinuation() const { return isElementContinuation() && !isInline(); }
virtualContinuation()401 virtual RenderBoxModelObject* virtualContinuation() const { return 0; }
402
isFloating()403 bool isFloating() const { return m_floating; }
isPositioned()404 bool isPositioned() const { return m_positioned; } // absolute or fixed positioning
isRelPositioned()405 bool isRelPositioned() const { return m_relPositioned; } // relative positioning
isText()406 bool isText() const { return m_isText; }
isBox()407 bool isBox() const { return m_isBox; }
isInline()408 bool isInline() const { return m_inline; } // inline object
isRunIn()409 bool isRunIn() const { return style()->display() == RUN_IN; } // run-in object
isDragging()410 bool isDragging() const { return m_isDragging; }
isReplaced()411 bool isReplaced() const { return m_replaced; } // a "replaced" element (see CSS)
isHorizontalWritingMode()412 bool isHorizontalWritingMode() const { return m_horizontalWritingMode; }
413
hasLayer()414 bool hasLayer() const { return m_hasLayer; }
415
hasBoxDecorations()416 bool hasBoxDecorations() const { return m_paintBackground; }
417 bool mustRepaintBackgroundOrBorder() const;
hasBackground()418 bool hasBackground() const { return style()->hasBackground(); }
needsLayout()419 bool needsLayout() const { return m_needsLayout || m_normalChildNeedsLayout || m_posChildNeedsLayout || m_needsSimplifiedNormalFlowLayout || m_needsPositionedMovementLayout; }
selfNeedsLayout()420 bool selfNeedsLayout() const { return m_needsLayout; }
needsPositionedMovementLayout()421 bool needsPositionedMovementLayout() const { return m_needsPositionedMovementLayout; }
needsPositionedMovementLayoutOnly()422 bool needsPositionedMovementLayoutOnly() const { return m_needsPositionedMovementLayout && !m_needsLayout && !m_normalChildNeedsLayout && !m_posChildNeedsLayout && !m_needsSimplifiedNormalFlowLayout; }
posChildNeedsLayout()423 bool posChildNeedsLayout() const { return m_posChildNeedsLayout; }
needsSimplifiedNormalFlowLayout()424 bool needsSimplifiedNormalFlowLayout() const { return m_needsSimplifiedNormalFlowLayout; }
normalChildNeedsLayout()425 bool normalChildNeedsLayout() const { return m_normalChildNeedsLayout; }
426
preferredLogicalWidthsDirty()427 bool preferredLogicalWidthsDirty() const { return m_preferredLogicalWidthsDirty; }
428
429 bool isSelectionBorder() const;
430
hasClip()431 bool hasClip() const { return isPositioned() && style()->hasClip(); }
hasOverflowClip()432 bool hasOverflowClip() const { return m_hasOverflowClip; }
433
hasTransform()434 bool hasTransform() const { return m_hasTransform; }
hasMask()435 bool hasMask() const { return style() && style()->hasMask(); }
436
437 inline bool preservesNewline() const;
438
439 #if !HAVE(PATH_BASED_BORDER_RADIUS_DRAWING)
440 // FIXME: This function should be removed when all ports implement GraphicsContext::clipConvexPolygon()!!
441 // At that time, everyone can use RenderObject::drawBoxSideFromPath() instead. This should happen soon.
442 void drawArcForBoxSide(GraphicsContext*, int x, int y, float thickness, const IntSize& radius, int angleStart,
443 int angleSpan, BoxSide, Color, EBorderStyle, bool firstCorner);
444 #endif
445
446 IntRect borderInnerRect(const IntRect&, unsigned short topWidth, unsigned short bottomWidth,
447 unsigned short leftWidth, unsigned short rightWidth) const;
448
449 // The pseudo element style can be cached or uncached. Use the cached method if the pseudo element doesn't respect
450 // any pseudo classes (and therefore has no concept of changing state).
451 RenderStyle* getCachedPseudoStyle(PseudoId, RenderStyle* parentStyle = 0) const;
452 PassRefPtr<RenderStyle> getUncachedPseudoStyle(PseudoId, RenderStyle* parentStyle = 0, RenderStyle* ownStyle = 0) const;
453
454 virtual void updateDragState(bool dragOn);
455
456 RenderView* view() const;
457
458 // Returns true if this renderer is rooted, and optionally returns the hosting view (the root of the hierarchy).
459 bool isRooted(RenderView** = 0);
460
node()461 Node* node() const { return m_isAnonymous ? 0 : m_node; }
462
463 // Returns the styled node that caused the generation of this renderer.
464 // This is the same as node() except for renderers of :before and :after
465 // pseudo elements for which their parent node is returned.
generatingNode()466 Node* generatingNode() const { return m_node == document() ? 0 : m_node; }
setNode(Node * node)467 void setNode(Node* node) { m_node = node; }
468
document()469 Document* document() const { return m_node->document(); }
frame()470 Frame* frame() const { return document()->frame(); }
471
472 bool hasOutlineAnnotation() const;
hasOutline()473 bool hasOutline() const { return style()->hasOutline() || hasOutlineAnnotation(); }
474
475 // Returns the object containing this one. Can be different from parent for positioned elements.
476 // If repaintContainer and repaintContainerSkipped are not null, on return *repaintContainerSkipped
477 // is true if the renderer returned is an ancestor of repaintContainer.
478 RenderObject* container(RenderBoxModelObject* repaintContainer = 0, bool* repaintContainerSkipped = 0) const;
479
hoverAncestor()480 virtual RenderObject* hoverAncestor() const { return parent(); }
481
482 // IE Extension that can be called on any RenderObject. See the implementation for the details.
483 RenderBoxModelObject* offsetParent() const;
484
485 void markContainingBlocksForLayout(bool scheduleRelayout = true, RenderObject* newRoot = 0);
486 void setNeedsLayout(bool b, bool markParents = true);
487 void setChildNeedsLayout(bool b, bool markParents = true);
488 void setNeedsPositionedMovementLayout();
489 void setNeedsSimplifiedNormalFlowLayout();
490 void setPreferredLogicalWidthsDirty(bool, bool markParents = true);
491 void invalidateContainerPreferredLogicalWidths();
492
setNeedsLayoutAndPrefWidthsRecalc()493 void setNeedsLayoutAndPrefWidthsRecalc()
494 {
495 setNeedsLayout(true);
496 setPreferredLogicalWidthsDirty(true);
497 }
498
499 void setPositioned(bool b = true) { m_positioned = b; }
500 void setRelPositioned(bool b = true) { m_relPositioned = b; }
501 void setFloating(bool b = true) { m_floating = b; }
502 void setInline(bool b = true) { m_inline = b; }
503 void setHasBoxDecorations(bool b = true) { m_paintBackground = b; }
setIsText()504 void setIsText() { m_isText = true; }
setIsBox()505 void setIsBox() { m_isBox = true; }
506 void setReplaced(bool b = true) { m_replaced = b; }
507 void setHorizontalWritingMode(bool b = true) { m_horizontalWritingMode = b; }
508 void setHasOverflowClip(bool b = true) { m_hasOverflowClip = b; }
509 void setHasLayer(bool b = true) { m_hasLayer = b; }
510 void setHasTransform(bool b = true) { m_hasTransform = b; }
511 void setHasReflection(bool b = true) { m_hasReflection = b; }
512
513 void scheduleRelayout();
514
515 void updateFillImages(const FillLayer*, const FillLayer*);
516 void updateImage(StyleImage*, StyleImage*);
517
518 virtual void paint(PaintInfo&, int tx, int ty);
519
520 // Recursive function that computes the size and position of this object and all its descendants.
521 virtual void layout();
522
523 /* This function performs a layout only if one is needed. */
layoutIfNeeded()524 void layoutIfNeeded() { if (needsLayout()) layout(); }
525
526 // used for element state updates that cannot be fixed with a
527 // repaint and do not need a relayout
updateFromElement()528 virtual void updateFromElement() { }
529
530 #if ENABLE(DASHBOARD_SUPPORT)
531 virtual void addDashboardRegions(Vector<DashboardRegionValue>&);
532 void collectDashboardRegions(Vector<DashboardRegionValue>&);
533 #endif
534
535 bool hitTest(const HitTestRequest&, HitTestResult&, const IntPoint&, int tx, int ty, HitTestFilter = HitTestAll);
536 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
537 virtual void updateHitTestResult(HitTestResult&, const IntPoint&);
538
539 VisiblePosition positionForCoordinates(int x, int y);
540 virtual VisiblePosition positionForPoint(const IntPoint&);
541 VisiblePosition createVisiblePosition(int offset, EAffinity);
542 VisiblePosition createVisiblePosition(const Position&);
543
544 virtual void dirtyLinesFromChangedChild(RenderObject*);
545
546 // Called to update a style that is allowed to trigger animations.
547 // FIXME: Right now this will typically be called only when updating happens from the DOM on explicit elements.
548 // We don't yet handle generated content animation such as first-letter or before/after (we'll worry about this later).
549 void setAnimatableStyle(PassRefPtr<RenderStyle>);
550
551 // Set the style of the object and update the state of the object accordingly.
552 virtual void setStyle(PassRefPtr<RenderStyle>);
553
554 // Updates only the local style ptr of the object. Does not update the state of the object,
555 // and so only should be called when the style is known not to have changed (or from setStyle).
556 void setStyleInternal(PassRefPtr<RenderStyle>);
557
558 // returns the containing block level element for this element.
559 RenderBlock* containingBlock() const;
560
561 // Convert the given local point to absolute coordinates
562 // FIXME: Temporary. If useTransforms is true, take transforms into account. Eventually localToAbsolute() will always be transform-aware.
563 FloatPoint localToAbsolute(const FloatPoint& localPoint = FloatPoint(), bool fixed = false, bool useTransforms = false) const;
564 FloatPoint absoluteToLocal(const FloatPoint&, bool fixed = false, bool useTransforms = false) const;
565
566 // Convert a local quad to absolute coordinates, taking transforms into account.
567 FloatQuad localToAbsoluteQuad(const FloatQuad& quad, bool fixed = false) const
568 {
569 return localToContainerQuad(quad, 0, fixed);
570 }
571 // Convert a local quad into the coordinate system of container, taking transforms into account.
572 FloatQuad localToContainerQuad(const FloatQuad&, RenderBoxModelObject* repaintContainer, bool fixed = false) const;
573
574 // Return the offset from the container() renderer (excluding transforms). In multi-column layout,
575 // different offsets apply at different points, so return the offset that applies to the given point.
576 virtual IntSize offsetFromContainer(RenderObject*, const IntPoint&) const;
577 // Return the offset from an object up the container() chain. Asserts that none of the intermediate objects have transforms.
578 IntSize offsetFromAncestorContainer(RenderObject*) const;
579
absoluteRects(Vector<IntRect> &,int,int)580 virtual void absoluteRects(Vector<IntRect>&, int, int) { }
581 // FIXME: useTransforms should go away eventually
582 IntRect absoluteBoundingBoxRect(bool useTransforms = false);
583
584 // Build an array of quads in absolute coords for line boxes
absoluteQuads(Vector<FloatQuad> &)585 virtual void absoluteQuads(Vector<FloatQuad>&) { }
586
587 void absoluteFocusRingQuads(Vector<FloatQuad>&);
588
589 // the rect that will be painted if this object is passed as the paintingRoot
590 IntRect paintingRootRect(IntRect& topLevelRect);
591
minPreferredLogicalWidth()592 virtual int minPreferredLogicalWidth() const { return 0; }
maxPreferredLogicalWidth()593 virtual int maxPreferredLogicalWidth() const { return 0; }
594
style()595 RenderStyle* style() const { return m_style.get(); }
firstLineStyle()596 RenderStyle* firstLineStyle() const { return document()->usesFirstLineRules() ? firstLineStyleSlowCase() : style(); }
style(bool firstLine)597 RenderStyle* style(bool firstLine) const { return firstLine ? firstLineStyle() : style(); }
598
599 // Used only by Element::pseudoStyleCacheIsInvalid to get a first line style based off of a
600 // given new style, without accessing the cache.
601 PassRefPtr<RenderStyle> uncachedFirstLineStyle(RenderStyle*) const;
602
603 // Anonymous blocks that are part of of a continuation chain will return their inline continuation's outline style instead.
604 // This is typically only relevant when repainting.
outlineStyleForRepaint()605 virtual RenderStyle* outlineStyleForRepaint() const { return style(); }
606
607 void getTextDecorationColors(int decorations, Color& underline, Color& overline,
608 Color& linethrough, bool quirksMode = false);
609
610 // Return the RenderBox in the container chain which is responsible for painting this object, or 0
611 // if painting is root-relative. This is the container that should be passed to the 'forRepaint'
612 // methods.
613 RenderBoxModelObject* containerForRepaint() const;
614 // Actually do the repaint of rect r for this object which has been computed in the coordinate space
615 // of repaintContainer. If repaintContainer is 0, repaint via the view.
616 void repaintUsingContainer(RenderBoxModelObject* repaintContainer, const IntRect& r, bool immediate = false);
617
618 // Repaint the entire object. Called when, e.g., the color of a border changes, or when a border
619 // style changes.
620 void repaint(bool immediate = false);
621
622 // Repaint a specific subrectangle within a given object. The rect |r| is in the object's coordinate space.
623 void repaintRectangle(const IntRect&, bool immediate = false);
624
625 // Repaint only if our old bounds and new bounds are different. The caller may pass in newBounds and newOutlineBox if they are known.
626 bool repaintAfterLayoutIfNeeded(RenderBoxModelObject* repaintContainer, const IntRect& oldBounds, const IntRect& oldOutlineBox, const IntRect* newBoundsPtr = 0, const IntRect* newOutlineBoxPtr = 0);
627
628 // Repaint only if the object moved.
629 virtual void repaintDuringLayoutIfMoved(const IntRect& rect);
630
631 // Called to repaint a block's floats.
632 virtual void repaintOverhangingFloats(bool paintAllDescendants = false);
633
634 bool checkForRepaintDuringLayout() const;
635
636 // Returns the rect that should be repainted whenever this object changes. The rect is in the view's
637 // coordinate space. This method deals with outlines and overflow.
absoluteClippedOverflowRect()638 IntRect absoluteClippedOverflowRect()
639 {
640 return clippedOverflowRectForRepaint(0);
641 }
642 virtual IntRect clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer);
643 virtual IntRect rectWithOutlineForRepaint(RenderBoxModelObject* repaintContainer, int outlineWidth);
644
645 // Given a rect in the object's coordinate space, compute a rect suitable for repainting
646 // that rect in view coordinates.
647 void computeAbsoluteRepaintRect(IntRect& r, bool fixed = false)
648 {
649 return computeRectForRepaint(0, r, fixed);
650 }
651 // Given a rect in the object's coordinate space, compute a rect suitable for repainting
652 // that rect in the coordinate space of repaintContainer.
653 virtual void computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect&, bool fixed = false);
654
655 // If multiple-column layout results in applying an offset to the given point, add the same
656 // offset to the given size.
adjustForColumns(IntSize &,const IntPoint &)657 virtual void adjustForColumns(IntSize&, const IntPoint&) const { }
658
length()659 virtual unsigned int length() const { return 1; }
660
isFloatingOrPositioned()661 bool isFloatingOrPositioned() const { return (isFloating() || isPositioned()); }
662
isTransparent()663 bool isTransparent() const { return style()->opacity() < 1.0f; }
opacity()664 float opacity() const { return style()->opacity(); }
665
hasReflection()666 bool hasReflection() const { return m_hasReflection; }
667
668 // Applied as a "slop" to dirty rect checks during the outline painting phase's dirty-rect checks.
669 int maximalOutlineSize(PaintPhase) const;
670
671 void setHasMarkupTruncation(bool b = true) { m_hasMarkupTruncation = b; }
hasMarkupTruncation()672 bool hasMarkupTruncation() const { return m_hasMarkupTruncation; }
673
674 enum SelectionState {
675 SelectionNone, // The object is not selected.
676 SelectionStart, // The object either contains the start of a selection run or is the start of a run
677 SelectionInside, // The object is fully encompassed by a selection run
678 SelectionEnd, // The object either contains the end of a selection run or is the end of a run
679 SelectionBoth // The object contains an entire run or is the sole selected object in that run
680 };
681
682 // The current selection state for an object. For blocks, the state refers to the state of the leaf
683 // descendants (as described above in the SelectionState enum declaration).
selectionState()684 SelectionState selectionState() const { return static_cast<SelectionState>(m_selectionState);; }
685
686 // Sets the selection state for an object.
setSelectionState(SelectionState state)687 virtual void setSelectionState(SelectionState state) { m_selectionState = state; }
688
689 // A single rectangle that encompasses all of the selected objects within this object. Used to determine the tightest
690 // possible bounding box for the selection.
691 IntRect selectionRect(bool clipToVisibleContent = true) { return selectionRectForRepaint(0, clipToVisibleContent); }
692 virtual IntRect selectionRectForRepaint(RenderBoxModelObject* /*repaintContainer*/, bool /*clipToVisibleContent*/ = true) { return IntRect(); }
693
694 // Whether or not an object can be part of the leaf elements of the selection.
canBeSelectionLeaf()695 virtual bool canBeSelectionLeaf() const { return false; }
696
697 // Whether or not a block has selected children.
hasSelectedChildren()698 bool hasSelectedChildren() const { return m_selectionState != SelectionNone; }
699
700 // Obtains the selection colors that should be used when painting a selection.
701 Color selectionBackgroundColor() const;
702 Color selectionForegroundColor() const;
703 Color selectionEmphasisMarkColor() const;
704
705 // Whether or not a given block needs to paint selection gaps.
shouldPaintSelectionGaps()706 virtual bool shouldPaintSelectionGaps() const { return false; }
707
708 #if ENABLE(DRAG_SUPPORT)
709 Node* draggableNode(bool dhtmlOK, bool uaOK, int x, int y, bool& dhtmlWillDrag) const;
710 #endif
711
712 /**
713 * Returns the local coordinates of the caret within this render object.
714 * @param caretOffset zero-based offset determining position within the render object.
715 * @param extraWidthToEndOfLine optional out arg to give extra width to end of line -
716 * useful for character range rect computations
717 */
718 virtual IntRect localCaretRect(InlineBox*, int caretOffset, int* extraWidthToEndOfLine = 0);
719
isMarginBeforeQuirk()720 bool isMarginBeforeQuirk() const { return m_marginBeforeQuirk; }
isMarginAfterQuirk()721 bool isMarginAfterQuirk() const { return m_marginAfterQuirk; }
722 void setMarginBeforeQuirk(bool b = true) { m_marginBeforeQuirk = b; }
723 void setMarginAfterQuirk(bool b = true) { m_marginAfterQuirk = b; }
724
725 // When performing a global document tear-down, the renderer of the document is cleared. We use this
726 // as a hook to detect the case of document destruction and don't waste time doing unnecessary work.
727 bool documentBeingDestroyed() const;
728
729 virtual void destroy();
730
731 // Virtual function helpers for CSS3 Flexible Box Layout
isFlexibleBox()732 virtual bool isFlexibleBox() const { return false; }
isFlexingChildren()733 virtual bool isFlexingChildren() const { return false; }
isStretchingChildren()734 virtual bool isStretchingChildren() const { return false; }
735
isCombineText()736 virtual bool isCombineText() const { return false; }
737
738 virtual int caretMinOffset() const;
739 virtual int caretMaxOffset() const;
740 virtual unsigned caretMaxRenderedOffset() const;
741
742 virtual int previousOffset(int current) const;
743 virtual int previousOffsetForBackwardDeletion(int current) const;
744 virtual int nextOffset(int current) const;
745
746 virtual void imageChanged(CachedImage*, const IntRect* = 0);
747 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) { }
748 virtual bool willRenderImage(CachedImage*);
749
750 void selectionStartEnd(int& spos, int& epos) const;
751
hasOverrideSize()752 bool hasOverrideSize() const { return m_hasOverrideSize; }
setHasOverrideSize(bool b)753 void setHasOverrideSize(bool b) { m_hasOverrideSize = b; }
754
remove()755 void remove() { if (parent()) parent()->removeChild(this); }
756
757 AnimationController* animation() const;
758
visibleToHitTesting()759 bool visibleToHitTesting() const { return style()->visibility() == VISIBLE && style()->pointerEvents() != PE_NONE; }
760
761 // Map points and quads through elements, potentially via 3d transforms. You should never need to call these directly; use
762 // localToAbsolute/absoluteToLocal methods instead.
763 virtual void mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool useTransforms, bool fixed, TransformState&) const;
764 virtual void mapAbsoluteToLocalPoint(bool fixed, bool useTransforms, TransformState&) const;
765
766 bool shouldUseTransformFromContainer(const RenderObject* container) const;
767 void getTransformFromContainer(const RenderObject* container, const IntSize& offsetInContainer, TransformationMatrix&) const;
768
addFocusRingRects(Vector<IntRect> &,int,int)769 virtual void addFocusRingRects(Vector<IntRect>&, int /*tx*/, int /*ty*/) { };
770
absoluteOutlineBounds()771 IntRect absoluteOutlineBounds() const
772 {
773 return outlineBoundsForRepaint(0);
774 }
775
776 protected:
777 // Overrides should call the superclass at the end
778 virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle);
779 // Overrides should call the superclass at the start
780 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
781 void propagateStyleToAnonymousChildren();
782
783 void drawLineForBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2, BoxSide,
784 Color, EBorderStyle, int adjbw1, int adjbw2, bool antialias = false);
785
786 void paintFocusRing(GraphicsContext*, int tx, int ty, RenderStyle*);
787 void paintOutline(GraphicsContext*, int tx, int ty, int w, int h);
788 void addPDFURLRect(GraphicsContext*, const IntRect&);
789
790 virtual IntRect viewRect() const;
791
792 void adjustRectForOutlineAndShadow(IntRect&) const;
793
794 void arenaDelete(RenderArena*, void* objectBase);
795
796 virtual IntRect outlineBoundsForRepaint(RenderBoxModelObject* /*repaintContainer*/, IntPoint* /*cachedOffsetToRepaintContainer*/ = 0) const { return IntRect(); }
797
798 class LayoutRepainter {
799 public:
800 LayoutRepainter(RenderObject& object, bool checkForRepaint, const IntRect* oldBounds = 0)
m_object(object)801 : m_object(object)
802 , m_repaintContainer(0)
803 , m_checkForRepaint(checkForRepaint)
804 {
805 if (m_checkForRepaint) {
806 m_repaintContainer = m_object.containerForRepaint();
807 m_oldBounds = oldBounds ? *oldBounds : m_object.clippedOverflowRectForRepaint(m_repaintContainer);
808 m_oldOutlineBox = m_object.outlineBoundsForRepaint(m_repaintContainer);
809 }
810 }
811
812 // Return true if it repainted.
repaintAfterLayout()813 bool repaintAfterLayout()
814 {
815 return m_checkForRepaint ? m_object.repaintAfterLayoutIfNeeded(m_repaintContainer, m_oldBounds, m_oldOutlineBox) : false;
816 }
817
checkForRepaint()818 bool checkForRepaint() const { return m_checkForRepaint; }
819
820 private:
821 RenderObject& m_object;
822 RenderBoxModelObject* m_repaintContainer;
823 IntRect m_oldBounds;
824 IntRect m_oldOutlineBox;
825 bool m_checkForRepaint;
826 };
827
828 private:
829 RenderStyle* firstLineStyleSlowCase() const;
830 StyleDifference adjustStyleDifference(StyleDifference, unsigned contextSensitiveProperties) const;
831
832 Color selectionColor(int colorProperty) const;
833
834 RefPtr<RenderStyle> m_style;
835
836 Node* m_node;
837
838 RenderObject* m_parent;
839 RenderObject* m_previous;
840 RenderObject* m_next;
841
842 #ifndef NDEBUG
843 bool m_hasAXObject;
844 bool m_setNeedsLayoutForbidden : 1;
845 #endif
846
847 // 32 bits have been used here. THERE ARE NO FREE BITS AVAILABLE.
848 bool m_needsLayout : 1;
849 bool m_needsPositionedMovementLayout :1;
850 bool m_normalChildNeedsLayout : 1;
851 bool m_posChildNeedsLayout : 1;
852 bool m_needsSimplifiedNormalFlowLayout : 1;
853 bool m_preferredLogicalWidthsDirty : 1;
854 bool m_floating : 1;
855
856 bool m_positioned : 1;
857 bool m_relPositioned : 1;
858 bool m_paintBackground : 1; // if the box has something to paint in the
859 // background painting phase (background, border, etc)
860
861 bool m_isAnonymous : 1;
862 bool m_isText : 1;
863 bool m_isBox : 1;
864 bool m_inline : 1;
865 bool m_replaced : 1;
866 bool m_horizontalWritingMode : 1;
867 bool m_isDragging : 1;
868
869 bool m_hasLayer : 1;
870 bool m_hasOverflowClip : 1; // Set in the case of overflow:auto/scroll/hidden
871 bool m_hasTransform : 1;
872 bool m_hasReflection : 1;
873
874 bool m_hasOverrideSize : 1;
875
876 public:
877 bool m_hasCounterNodeMap : 1;
878 bool m_everHadLayout : 1;
879
880 private:
881 // These bitfields are moved here from subclasses to pack them together
882 // from RenderBlock
883 bool m_childrenInline : 1;
884 bool m_marginBeforeQuirk : 1;
885 bool m_marginAfterQuirk : 1;
886 bool m_hasMarkupTruncation : 1;
887 unsigned m_selectionState : 3; // SelectionState
888 bool m_hasColumns : 1;
889
890 // from RenderTableCell
891 bool m_cellWidthChanged : 1;
892
893 private:
894 // Store state between styleWillChange and styleDidChange
895 static bool s_affectsParentBlock;
896 };
897
documentBeingDestroyed()898 inline bool RenderObject::documentBeingDestroyed() const
899 {
900 return !document()->renderer();
901 }
902
isBeforeContent()903 inline bool RenderObject::isBeforeContent() const
904 {
905 if (style()->styleType() != BEFORE)
906 return false;
907 // Text nodes don't have their own styles, so ignore the style on a text node.
908 if (isText() && !isBR())
909 return false;
910 return true;
911 }
912
isAfterContent()913 inline bool RenderObject::isAfterContent() const
914 {
915 if (style()->styleType() != AFTER)
916 return false;
917 // Text nodes don't have their own styles, so ignore the style on a text node.
918 if (isText() && !isBR())
919 return false;
920 return true;
921 }
922
isBeforeOrAfterContent()923 inline bool RenderObject::isBeforeOrAfterContent() const
924 {
925 return isBeforeContent() || isAfterContent();
926 }
927
setNeedsLayout(bool b,bool markParents)928 inline void RenderObject::setNeedsLayout(bool b, bool markParents)
929 {
930 bool alreadyNeededLayout = m_needsLayout;
931 m_needsLayout = b;
932 if (b) {
933 ASSERT(!isSetNeedsLayoutForbidden());
934 if (!alreadyNeededLayout) {
935 if (markParents)
936 markContainingBlocksForLayout();
937 if (hasLayer())
938 setLayerNeedsFullRepaint();
939 }
940 } else {
941 m_everHadLayout = true;
942 m_posChildNeedsLayout = false;
943 m_needsSimplifiedNormalFlowLayout = false;
944 m_normalChildNeedsLayout = false;
945 m_needsPositionedMovementLayout = false;
946 }
947 }
948
setChildNeedsLayout(bool b,bool markParents)949 inline void RenderObject::setChildNeedsLayout(bool b, bool markParents)
950 {
951 bool alreadyNeededLayout = m_normalChildNeedsLayout;
952 m_normalChildNeedsLayout = b;
953 if (b) {
954 ASSERT(!isSetNeedsLayoutForbidden());
955 if (!alreadyNeededLayout && markParents)
956 markContainingBlocksForLayout();
957 } else {
958 m_posChildNeedsLayout = false;
959 m_needsSimplifiedNormalFlowLayout = false;
960 m_normalChildNeedsLayout = false;
961 m_needsPositionedMovementLayout = false;
962 }
963 }
964
setNeedsPositionedMovementLayout()965 inline void RenderObject::setNeedsPositionedMovementLayout()
966 {
967 bool alreadyNeededLayout = m_needsPositionedMovementLayout;
968 m_needsPositionedMovementLayout = true;
969 ASSERT(!isSetNeedsLayoutForbidden());
970 if (!alreadyNeededLayout) {
971 markContainingBlocksForLayout();
972 if (hasLayer())
973 setLayerNeedsFullRepaint();
974 }
975 }
976
setNeedsSimplifiedNormalFlowLayout()977 inline void RenderObject::setNeedsSimplifiedNormalFlowLayout()
978 {
979 bool alreadyNeededLayout = m_needsSimplifiedNormalFlowLayout;
980 m_needsSimplifiedNormalFlowLayout = true;
981 ASSERT(!isSetNeedsLayoutForbidden());
982 if (!alreadyNeededLayout) {
983 markContainingBlocksForLayout();
984 if (hasLayer())
985 setLayerNeedsFullRepaint();
986 }
987 }
988
objectIsRelayoutBoundary(const RenderObject * obj)989 inline bool objectIsRelayoutBoundary(const RenderObject *obj)
990 {
991 // FIXME: In future it may be possible to broaden this condition in order to improve performance.
992 // Table cells are excluded because even when their CSS height is fixed, their height()
993 // may depend on their contents.
994 return obj->isTextControl()
995 || (obj->hasOverflowClip() && !obj->style()->width().isIntrinsicOrAuto() && !obj->style()->height().isIntrinsicOrAuto() && !obj->style()->height().isPercent() && !obj->isTableCell())
996 #if ENABLE(SVG)
997 || obj->isSVGRoot()
998 #endif
999 ;
1000 }
1001
markContainingBlocksForLayout(bool scheduleRelayout,RenderObject * newRoot)1002 inline void RenderObject::markContainingBlocksForLayout(bool scheduleRelayout, RenderObject* newRoot)
1003 {
1004 ASSERT(!scheduleRelayout || !newRoot);
1005
1006 RenderObject* o = container();
1007 RenderObject* last = this;
1008
1009 bool simplifiedNormalFlowLayout = needsSimplifiedNormalFlowLayout() && !selfNeedsLayout() && !normalChildNeedsLayout();
1010
1011 while (o) {
1012 // Don't mark the outermost object of an unrooted subtree. That object will be
1013 // marked when the subtree is added to the document.
1014 RenderObject* container = o->container();
1015 if (!container && !o->isRenderView())
1016 return;
1017 if (!last->isText() && (last->style()->position() == FixedPosition || last->style()->position() == AbsolutePosition)) {
1018 while (o && !o->isRenderBlock()) // Skip relatively positioned inlines and get to the enclosing RenderBlock.
1019 o = o->container();
1020 if (!o || o->m_posChildNeedsLayout)
1021 return;
1022 o->m_posChildNeedsLayout = true;
1023 simplifiedNormalFlowLayout = true;
1024 ASSERT(!o->isSetNeedsLayoutForbidden());
1025 } else if (simplifiedNormalFlowLayout) {
1026 if (o->m_needsSimplifiedNormalFlowLayout)
1027 return;
1028 o->m_needsSimplifiedNormalFlowLayout = true;
1029 ASSERT(!o->isSetNeedsLayoutForbidden());
1030 } else {
1031 if (o->m_normalChildNeedsLayout)
1032 return;
1033 o->m_normalChildNeedsLayout = true;
1034 ASSERT(!o->isSetNeedsLayoutForbidden());
1035 }
1036
1037 if (o == newRoot)
1038 return;
1039
1040 last = o;
1041 if (scheduleRelayout && objectIsRelayoutBoundary(last))
1042 break;
1043 o = container;
1044 }
1045
1046 if (scheduleRelayout)
1047 last->scheduleRelayout();
1048 }
1049
preservesNewline()1050 inline bool RenderObject::preservesNewline() const
1051 {
1052 #if ENABLE(SVG)
1053 if (isSVGInlineText())
1054 return false;
1055 #endif
1056
1057 return style()->preserveNewline();
1058 }
1059
makeMatrixRenderable(TransformationMatrix & matrix,bool has3DRendering)1060 inline void makeMatrixRenderable(TransformationMatrix& matrix, bool has3DRendering)
1061 {
1062 #if !ENABLE(3D_RENDERING)
1063 UNUSED_PARAM(has3DRendering);
1064 matrix.makeAffine();
1065 #else
1066 if (!has3DRendering)
1067 matrix.makeAffine();
1068 #endif
1069 }
1070
adjustForAbsoluteZoom(int value,RenderObject * renderer)1071 inline int adjustForAbsoluteZoom(int value, RenderObject* renderer)
1072 {
1073 return adjustForAbsoluteZoom(value, renderer->style());
1074 }
1075
adjustFloatPointForAbsoluteZoom(const FloatPoint & point,RenderObject * renderer)1076 inline FloatPoint adjustFloatPointForAbsoluteZoom(const FloatPoint& point, RenderObject* renderer)
1077 {
1078 // The result here is in floats, so we don't need the truncation hack from the integer version above.
1079 float zoomFactor = renderer->style()->effectiveZoom();
1080 if (zoomFactor == 1)
1081 return point;
1082 return FloatPoint(point.x() / zoomFactor, point.y() / zoomFactor);
1083 }
1084
adjustFloatQuadForAbsoluteZoom(FloatQuad & quad,RenderObject * renderer)1085 inline void adjustFloatQuadForAbsoluteZoom(FloatQuad& quad, RenderObject* renderer)
1086 {
1087 quad.setP1(adjustFloatPointForAbsoluteZoom(quad.p1(), renderer));
1088 quad.setP2(adjustFloatPointForAbsoluteZoom(quad.p2(), renderer));
1089 quad.setP3(adjustFloatPointForAbsoluteZoom(quad.p3(), renderer));
1090 quad.setP4(adjustFloatPointForAbsoluteZoom(quad.p4(), renderer));
1091 }
1092
adjustFloatRectForAbsoluteZoom(FloatRect & rect,RenderObject * renderer)1093 inline void adjustFloatRectForAbsoluteZoom(FloatRect& rect, RenderObject* renderer)
1094 {
1095 RenderStyle* style = renderer->style();
1096 rect.setX(adjustFloatForAbsoluteZoom(rect.x(), style));
1097 rect.setY(adjustFloatForAbsoluteZoom(rect.y(), style));
1098 rect.setWidth(adjustFloatForAbsoluteZoom(rect.width(), style));
1099 rect.setHeight(adjustFloatForAbsoluteZoom(rect.height(), style));
1100 }
1101
adjustFloatPointForPageScale(const FloatPoint & point,float pageScale)1102 inline FloatPoint adjustFloatPointForPageScale(const FloatPoint& point, float pageScale)
1103 {
1104 if (pageScale == 1)
1105 return point;
1106 return FloatPoint(point.x() / pageScale, point.y() / pageScale);
1107 }
1108
adjustFloatQuadForPageScale(FloatQuad & quad,float pageScale)1109 inline void adjustFloatQuadForPageScale(FloatQuad& quad, float pageScale)
1110 {
1111 if (pageScale == 1)
1112 return;
1113 quad.setP1(adjustFloatPointForPageScale(quad.p1(), pageScale));
1114 quad.setP2(adjustFloatPointForPageScale(quad.p2(), pageScale));
1115 quad.setP3(adjustFloatPointForPageScale(quad.p3(), pageScale));
1116 quad.setP4(adjustFloatPointForPageScale(quad.p4(), pageScale));
1117 }
1118
adjustFloatRectForPageScale(FloatRect & rect,float pageScale)1119 inline void adjustFloatRectForPageScale(FloatRect& rect, float pageScale)
1120 {
1121 if (pageScale == 1)
1122 return;
1123 rect.setX(rect.x() / pageScale);
1124 rect.setY(rect.y() / pageScale);
1125 rect.setWidth(rect.width() / pageScale);
1126 rect.setHeight(rect.height() / pageScale);
1127 }
1128
1129 } // namespace WebCore
1130
1131 #ifndef NDEBUG
1132 // Outside the WebCore namespace for ease of invocation from gdb.
1133 void showTree(const WebCore::RenderObject*);
1134 void showRenderTree(const WebCore::RenderObject* object1);
1135 // We don't make object2 an optional parameter so that showRenderTree
1136 // can be called from gdb easily.
1137 void showRenderTree(const WebCore::RenderObject* object1, const WebCore::RenderObject* object2);
1138 #endif
1139
1140 #endif // RenderObject_h
1141