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;
isBeforeContent(const RenderObject * obj)315 static inline bool isBeforeContent(const RenderObject* obj) { return obj && obj->isBeforeContent(); }
isAfterContent(const RenderObject * obj)316 static inline bool isAfterContent(const RenderObject* obj) { return obj && obj->isAfterContent(); }
317
childrenInline()318 bool childrenInline() const { return m_childrenInline; }
319 void setChildrenInline(bool b = true) { m_childrenInline = b; }
hasColumns()320 bool hasColumns() const { return m_hasColumns; }
321 void setHasColumns(bool b = true) { m_hasColumns = b; }
322
requiresForcedStyleRecalcPropagation()323 virtual bool requiresForcedStyleRecalcPropagation() const { return false; }
324
325 #if ENABLE(MATHML)
isRenderMathMLBlock()326 virtual bool isRenderMathMLBlock() const { return false; }
327 #endif // ENABLE(MATHML)
328
329 #if ENABLE(SVG)
330 // FIXME: Until all SVG renders can be subclasses of RenderSVGModelObject we have
331 // to add SVG renderer methods to RenderObject with an ASSERT_NOT_REACHED() default implementation.
isSVGRoot()332 virtual bool isSVGRoot() const { return false; }
isSVGContainer()333 virtual bool isSVGContainer() const { return false; }
isSVGViewportContainer()334 virtual bool isSVGViewportContainer() const { return false; }
isSVGGradientStop()335 virtual bool isSVGGradientStop() const { return false; }
isSVGHiddenContainer()336 virtual bool isSVGHiddenContainer() const { return false; }
isSVGPath()337 virtual bool isSVGPath() const { return false; }
isSVGText()338 virtual bool isSVGText() const { return false; }
isSVGTextPath()339 virtual bool isSVGTextPath() const { return false; }
isSVGInline()340 virtual bool isSVGInline() const { return false; }
isSVGInlineText()341 virtual bool isSVGInlineText() const { return false; }
isSVGImage()342 virtual bool isSVGImage() const { return false; }
isSVGForeignObject()343 virtual bool isSVGForeignObject() const { return false; }
isSVGResourceContainer()344 virtual bool isSVGResourceContainer() const { return false; }
isSVGResourceFilter()345 virtual bool isSVGResourceFilter() const { return false; }
isSVGResourceFilterPrimitive()346 virtual bool isSVGResourceFilterPrimitive() const { return false; }
isSVGShadowTreeRootContainer()347 virtual bool isSVGShadowTreeRootContainer() const { return false; }
348
349 virtual RenderSVGResourceContainer* toRenderSVGResourceContainer();
350
351 // FIXME: Those belong into a SVG specific base-class for all renderers (see above)
352 // Unfortunately we don't have such a class yet, because it's not possible for all renderers
353 // to inherit from RenderSVGObject -> RenderObject (some need RenderBlock inheritance for instance)
setNeedsTransformUpdate()354 virtual void setNeedsTransformUpdate() { }
355 virtual void setNeedsBoundariesUpdate();
356
357 // Per SVG 1.1 objectBoundingBox ignores clipping, masking, filter effects, opacity and stroke-width.
358 // This is used for all computation of objectBoundingBox relative units and by SVGLocateable::getBBox().
359 // NOTE: Markers are not specifically ignored here by SVG 1.1 spec, but we ignore them
360 // since stroke-width is ignored (and marker size can depend on stroke-width).
361 // objectBoundingBox is returned local coordinates.
362 // The name objectBoundingBox is taken from the SVG 1.1 spec.
363 virtual FloatRect objectBoundingBox() const;
364 virtual FloatRect strokeBoundingBox() const;
365
366 // Returns the smallest rectangle enclosing all of the painted content
367 // respecting clipping, masking, filters, opacity, stroke-width and markers
368 virtual FloatRect repaintRectInLocalCoordinates() const;
369
370 // This only returns the transform="" value from the element
371 // most callsites want localToParentTransform() instead.
372 virtual AffineTransform localTransform() const;
373
374 // Returns the full transform mapping from local coordinates to local coords for the parent SVG renderer
375 // This includes any viewport transforms and x/y offsets as well as the transform="" value off the element.
376 virtual const AffineTransform& localToParentTransform() const;
377
378 // SVG uses FloatPoint precise hit testing, and passes the point in parent
379 // coordinates instead of in repaint container coordinates. Eventually the
380 // rest of the rendering tree will move to a similar model.
381 virtual bool nodeAtFloatPoint(const HitTestRequest&, HitTestResult&, const FloatPoint& pointInParent, HitTestAction);
382 #endif
383
isAnonymous()384 bool isAnonymous() const { return m_isAnonymous; }
setIsAnonymous(bool b)385 void setIsAnonymous(bool b) { m_isAnonymous = b; }
isAnonymousBlock()386 bool isAnonymousBlock() const
387 {
388 // This function is kept in sync with anonymous block creation conditions in
389 // RenderBlock::createAnonymousBlock(). This includes creating an anonymous
390 // RenderBlock having a BLOCK or BOX display. Other classes such as RenderTextFragment
391 // are not RenderBlocks and will return false. See https://bugs.webkit.org/show_bug.cgi?id=56709.
392 return m_isAnonymous && (style()->display() == BLOCK || style()->display() == BOX) && style()->styleType() == NOPSEUDO && isRenderBlock() && !isListMarker();
393 }
isAnonymousColumnsBlock()394 bool isAnonymousColumnsBlock() const { return style()->specifiesColumns() && isAnonymousBlock(); }
isAnonymousColumnSpanBlock()395 bool isAnonymousColumnSpanBlock() const { return style()->columnSpan() && isAnonymousBlock(); }
isElementContinuation()396 bool isElementContinuation() const { return node() && node()->renderer() != this; }
isInlineElementContinuation()397 bool isInlineElementContinuation() const { return isElementContinuation() && isInline(); }
isBlockElementContinuation()398 bool isBlockElementContinuation() const { return isElementContinuation() && !isInline(); }
virtualContinuation()399 virtual RenderBoxModelObject* virtualContinuation() const { return 0; }
400
isFloating()401 bool isFloating() const { return m_floating; }
isPositioned()402 bool isPositioned() const { return m_positioned; } // absolute or fixed positioning
isRelPositioned()403 bool isRelPositioned() const { return m_relPositioned; } // relative positioning
isText()404 bool isText() const { return m_isText; }
isBox()405 bool isBox() const { return m_isBox; }
isInline()406 bool isInline() const { return m_inline; } // inline object
isRunIn()407 bool isRunIn() const { return style()->display() == RUN_IN; } // run-in object
isDragging()408 bool isDragging() const { return m_isDragging; }
isReplaced()409 bool isReplaced() const { return m_replaced; } // a "replaced" element (see CSS)
isHorizontalWritingMode()410 bool isHorizontalWritingMode() const { return m_horizontalWritingMode; }
411
hasLayer()412 bool hasLayer() const { return m_hasLayer; }
413
hasBoxDecorations()414 bool hasBoxDecorations() const { return m_paintBackground; }
415 bool mustRepaintBackgroundOrBorder() const;
hasBackground()416 bool hasBackground() const { return style()->hasBackground(); }
needsLayout()417 bool needsLayout() const { return m_needsLayout || m_normalChildNeedsLayout || m_posChildNeedsLayout || m_needsSimplifiedNormalFlowLayout || m_needsPositionedMovementLayout; }
selfNeedsLayout()418 bool selfNeedsLayout() const { return m_needsLayout; }
needsPositionedMovementLayout()419 bool needsPositionedMovementLayout() const { return m_needsPositionedMovementLayout; }
needsPositionedMovementLayoutOnly()420 bool needsPositionedMovementLayoutOnly() const { return m_needsPositionedMovementLayout && !m_needsLayout && !m_normalChildNeedsLayout && !m_posChildNeedsLayout && !m_needsSimplifiedNormalFlowLayout; }
posChildNeedsLayout()421 bool posChildNeedsLayout() const { return m_posChildNeedsLayout; }
needsSimplifiedNormalFlowLayout()422 bool needsSimplifiedNormalFlowLayout() const { return m_needsSimplifiedNormalFlowLayout; }
normalChildNeedsLayout()423 bool normalChildNeedsLayout() const { return m_normalChildNeedsLayout; }
424
preferredLogicalWidthsDirty()425 bool preferredLogicalWidthsDirty() const { return m_preferredLogicalWidthsDirty; }
426
427 bool isSelectionBorder() const;
428
hasClip()429 bool hasClip() const { return isPositioned() && style()->hasClip(); }
hasOverflowClip()430 bool hasOverflowClip() const { return m_hasOverflowClip; }
431
hasTransform()432 bool hasTransform() const { return m_hasTransform; }
hasMask()433 bool hasMask() const { return style() && style()->hasMask(); }
434
435 inline bool preservesNewline() const;
436
437 #if !HAVE(PATH_BASED_BORDER_RADIUS_DRAWING)
438 // FIXME: This function should be removed when all ports implement GraphicsContext::clipConvexPolygon()!!
439 // At that time, everyone can use RenderObject::drawBoxSideFromPath() instead. This should happen soon.
440 void drawArcForBoxSide(GraphicsContext*, int x, int y, float thickness, const IntSize& radius, int angleStart,
441 int angleSpan, BoxSide, Color, EBorderStyle, bool firstCorner);
442 #endif
443
444 IntRect borderInnerRect(const IntRect&, unsigned short topWidth, unsigned short bottomWidth,
445 unsigned short leftWidth, unsigned short rightWidth) const;
446
447 // The pseudo element style can be cached or uncached. Use the cached method if the pseudo element doesn't respect
448 // any pseudo classes (and therefore has no concept of changing state).
449 RenderStyle* getCachedPseudoStyle(PseudoId, RenderStyle* parentStyle = 0) const;
450 PassRefPtr<RenderStyle> getUncachedPseudoStyle(PseudoId, RenderStyle* parentStyle = 0, RenderStyle* ownStyle = 0) const;
451
452 virtual void updateDragState(bool dragOn);
453
454 RenderView* view() const;
455
456 // Returns true if this renderer is rooted, and optionally returns the hosting view (the root of the hierarchy).
457 bool isRooted(RenderView** = 0);
458
node()459 Node* node() const { return m_isAnonymous ? 0 : m_node; }
460
461 // Returns the styled node that caused the generation of this renderer.
462 // This is the same as node() except for renderers of :before and :after
463 // pseudo elements for which their parent node is returned.
generatingNode()464 Node* generatingNode() const { return m_node == document() ? 0 : m_node; }
setNode(Node * node)465 void setNode(Node* node) { m_node = node; }
466
document()467 Document* document() const { return m_node->document(); }
frame()468 Frame* frame() const { return document()->frame(); }
469
470 bool hasOutlineAnnotation() const;
hasOutline()471 bool hasOutline() const { return style()->hasOutline() || hasOutlineAnnotation(); }
472
473 // Returns the object containing this one. Can be different from parent for positioned elements.
474 // If repaintContainer and repaintContainerSkipped are not null, on return *repaintContainerSkipped
475 // is true if the renderer returned is an ancestor of repaintContainer.
476 RenderObject* container(RenderBoxModelObject* repaintContainer = 0, bool* repaintContainerSkipped = 0) const;
477
hoverAncestor()478 virtual RenderObject* hoverAncestor() const { return parent(); }
479
480 // IE Extension that can be called on any RenderObject. See the implementation for the details.
481 RenderBoxModelObject* offsetParent() const;
482
483 void markContainingBlocksForLayout(bool scheduleRelayout = true, RenderObject* newRoot = 0);
484 void setNeedsLayout(bool b, bool markParents = true);
485 void setChildNeedsLayout(bool b, bool markParents = true);
486 void setNeedsPositionedMovementLayout();
487 void setNeedsSimplifiedNormalFlowLayout();
488 void setPreferredLogicalWidthsDirty(bool, bool markParents = true);
489 void invalidateContainerPreferredLogicalWidths();
490
setNeedsLayoutAndPrefWidthsRecalc()491 void setNeedsLayoutAndPrefWidthsRecalc()
492 {
493 setNeedsLayout(true);
494 setPreferredLogicalWidthsDirty(true);
495 }
496
497 void setPositioned(bool b = true) { m_positioned = b; }
498 void setRelPositioned(bool b = true) { m_relPositioned = b; }
499 void setFloating(bool b = true) { m_floating = b; }
500 void setInline(bool b = true) { m_inline = b; }
501 void setHasBoxDecorations(bool b = true) { m_paintBackground = b; }
setIsText()502 void setIsText() { m_isText = true; }
setIsBox()503 void setIsBox() { m_isBox = true; }
504 void setReplaced(bool b = true) { m_replaced = b; }
505 void setHorizontalWritingMode(bool b = true) { m_horizontalWritingMode = b; }
506 void setHasOverflowClip(bool b = true) { m_hasOverflowClip = b; }
507 void setHasLayer(bool b = true) { m_hasLayer = b; }
508 void setHasTransform(bool b = true) { m_hasTransform = b; }
509 void setHasReflection(bool b = true) { m_hasReflection = b; }
510
511 void scheduleRelayout();
512
513 void updateFillImages(const FillLayer*, const FillLayer*);
514 void updateImage(StyleImage*, StyleImage*);
515
516 virtual void paint(PaintInfo&, int tx, int ty);
517
518 // Recursive function that computes the size and position of this object and all its descendants.
519 virtual void layout();
520
521 /* This function performs a layout only if one is needed. */
layoutIfNeeded()522 void layoutIfNeeded() { if (needsLayout()) layout(); }
523
524 // used for element state updates that cannot be fixed with a
525 // repaint and do not need a relayout
updateFromElement()526 virtual void updateFromElement() { }
527
528 #if ENABLE(DASHBOARD_SUPPORT)
529 virtual void addDashboardRegions(Vector<DashboardRegionValue>&);
530 void collectDashboardRegions(Vector<DashboardRegionValue>&);
531 #endif
532
533 bool hitTest(const HitTestRequest&, HitTestResult&, const IntPoint&, int tx, int ty, HitTestFilter = HitTestAll);
534 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
535 virtual void updateHitTestResult(HitTestResult&, const IntPoint&);
536
537 VisiblePosition positionForCoordinates(int x, int y);
538 virtual VisiblePosition positionForPoint(const IntPoint&);
539 VisiblePosition createVisiblePosition(int offset, EAffinity);
540 VisiblePosition createVisiblePosition(const Position&);
541
542 virtual void dirtyLinesFromChangedChild(RenderObject*);
543
544 // Called to update a style that is allowed to trigger animations.
545 // FIXME: Right now this will typically be called only when updating happens from the DOM on explicit elements.
546 // We don't yet handle generated content animation such as first-letter or before/after (we'll worry about this later).
547 void setAnimatableStyle(PassRefPtr<RenderStyle>);
548
549 // Set the style of the object and update the state of the object accordingly.
550 virtual void setStyle(PassRefPtr<RenderStyle>);
551
552 // Updates only the local style ptr of the object. Does not update the state of the object,
553 // and so only should be called when the style is known not to have changed (or from setStyle).
554 void setStyleInternal(PassRefPtr<RenderStyle>);
555
556 // returns the containing block level element for this element.
557 RenderBlock* containingBlock() const;
558
559 // Convert the given local point to absolute coordinates
560 // FIXME: Temporary. If useTransforms is true, take transforms into account. Eventually localToAbsolute() will always be transform-aware.
561 FloatPoint localToAbsolute(const FloatPoint& localPoint = FloatPoint(), bool fixed = false, bool useTransforms = false) const;
562 FloatPoint absoluteToLocal(const FloatPoint&, bool fixed = false, bool useTransforms = false) const;
563
564 // Convert a local quad to absolute coordinates, taking transforms into account.
565 FloatQuad localToAbsoluteQuad(const FloatQuad& quad, bool fixed = false) const
566 {
567 return localToContainerQuad(quad, 0, fixed);
568 }
569 // Convert a local quad into the coordinate system of container, taking transforms into account.
570 FloatQuad localToContainerQuad(const FloatQuad&, RenderBoxModelObject* repaintContainer, bool fixed = false) const;
571
572 // Return the offset from the container() renderer (excluding transforms). In multi-column layout,
573 // different offsets apply at different points, so return the offset that applies to the given point.
574 virtual IntSize offsetFromContainer(RenderObject*, const IntPoint&) const;
575 // Return the offset from an object up the container() chain. Asserts that none of the intermediate objects have transforms.
576 IntSize offsetFromAncestorContainer(RenderObject*) const;
577
absoluteRects(Vector<IntRect> &,int,int)578 virtual void absoluteRects(Vector<IntRect>&, int, int) { }
579 // FIXME: useTransforms should go away eventually
580 IntRect absoluteBoundingBoxRect(bool useTransforms = false);
581
582 // Build an array of quads in absolute coords for line boxes
absoluteQuads(Vector<FloatQuad> &)583 virtual void absoluteQuads(Vector<FloatQuad>&) { }
584
585 void absoluteFocusRingQuads(Vector<FloatQuad>&);
586
587 // the rect that will be painted if this object is passed as the paintingRoot
588 IntRect paintingRootRect(IntRect& topLevelRect);
589
minPreferredLogicalWidth()590 virtual int minPreferredLogicalWidth() const { return 0; }
maxPreferredLogicalWidth()591 virtual int maxPreferredLogicalWidth() const { return 0; }
592
style()593 RenderStyle* style() const { return m_style.get(); }
firstLineStyle()594 RenderStyle* firstLineStyle() const { return document()->usesFirstLineRules() ? firstLineStyleSlowCase() : style(); }
style(bool firstLine)595 RenderStyle* style(bool firstLine) const { return firstLine ? firstLineStyle() : style(); }
596
597 // Used only by Element::pseudoStyleCacheIsInvalid to get a first line style based off of a
598 // given new style, without accessing the cache.
599 PassRefPtr<RenderStyle> uncachedFirstLineStyle(RenderStyle*) const;
600
601 // Anonymous blocks that are part of of a continuation chain will return their inline continuation's outline style instead.
602 // This is typically only relevant when repainting.
outlineStyleForRepaint()603 virtual RenderStyle* outlineStyleForRepaint() const { return style(); }
604
605 void getTextDecorationColors(int decorations, Color& underline, Color& overline,
606 Color& linethrough, bool quirksMode = false);
607
608 // Return the RenderBox in the container chain which is responsible for painting this object, or 0
609 // if painting is root-relative. This is the container that should be passed to the 'forRepaint'
610 // methods.
611 RenderBoxModelObject* containerForRepaint() const;
612 // Actually do the repaint of rect r for this object which has been computed in the coordinate space
613 // of repaintContainer. If repaintContainer is 0, repaint via the view.
614 void repaintUsingContainer(RenderBoxModelObject* repaintContainer, const IntRect& r, bool immediate = false);
615
616 // Repaint the entire object. Called when, e.g., the color of a border changes, or when a border
617 // style changes.
618 void repaint(bool immediate = false);
619
620 // Repaint a specific subrectangle within a given object. The rect |r| is in the object's coordinate space.
621 void repaintRectangle(const IntRect&, bool immediate = false);
622
623 // Repaint only if our old bounds and new bounds are different. The caller may pass in newBounds and newOutlineBox if they are known.
624 bool repaintAfterLayoutIfNeeded(RenderBoxModelObject* repaintContainer, const IntRect& oldBounds, const IntRect& oldOutlineBox, const IntRect* newBoundsPtr = 0, const IntRect* newOutlineBoxPtr = 0);
625
626 // Repaint only if the object moved.
627 virtual void repaintDuringLayoutIfMoved(const IntRect& rect);
628
629 // Called to repaint a block's floats.
630 virtual void repaintOverhangingFloats(bool paintAllDescendants = false);
631
632 bool checkForRepaintDuringLayout() const;
633
634 // Returns the rect that should be repainted whenever this object changes. The rect is in the view's
635 // coordinate space. This method deals with outlines and overflow.
absoluteClippedOverflowRect()636 IntRect absoluteClippedOverflowRect()
637 {
638 return clippedOverflowRectForRepaint(0);
639 }
640 virtual IntRect clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer);
641 virtual IntRect rectWithOutlineForRepaint(RenderBoxModelObject* repaintContainer, int outlineWidth);
642
643 // Given a rect in the object's coordinate space, compute a rect suitable for repainting
644 // that rect in view coordinates.
645 void computeAbsoluteRepaintRect(IntRect& r, bool fixed = false)
646 {
647 return computeRectForRepaint(0, r, fixed);
648 }
649 // Given a rect in the object's coordinate space, compute a rect suitable for repainting
650 // that rect in the coordinate space of repaintContainer.
651 virtual void computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect&, bool fixed = false);
652
653 // If multiple-column layout results in applying an offset to the given point, add the same
654 // offset to the given size.
adjustForColumns(IntSize &,const IntPoint &)655 virtual void adjustForColumns(IntSize&, const IntPoint&) const { }
656
length()657 virtual unsigned int length() const { return 1; }
658
isFloatingOrPositioned()659 bool isFloatingOrPositioned() const { return (isFloating() || isPositioned()); }
660
isTransparent()661 bool isTransparent() const { return style()->opacity() < 1.0f; }
opacity()662 float opacity() const { return style()->opacity(); }
663
hasReflection()664 bool hasReflection() const { return m_hasReflection; }
665
666 // Applied as a "slop" to dirty rect checks during the outline painting phase's dirty-rect checks.
667 int maximalOutlineSize(PaintPhase) const;
668
669 void setHasMarkupTruncation(bool b = true) { m_hasMarkupTruncation = b; }
hasMarkupTruncation()670 bool hasMarkupTruncation() const { return m_hasMarkupTruncation; }
671
672 enum SelectionState {
673 SelectionNone, // The object is not selected.
674 SelectionStart, // The object either contains the start of a selection run or is the start of a run
675 SelectionInside, // The object is fully encompassed by a selection run
676 SelectionEnd, // The object either contains the end of a selection run or is the end of a run
677 SelectionBoth // The object contains an entire run or is the sole selected object in that run
678 };
679
680 // The current selection state for an object. For blocks, the state refers to the state of the leaf
681 // descendants (as described above in the SelectionState enum declaration).
selectionState()682 SelectionState selectionState() const { return static_cast<SelectionState>(m_selectionState);; }
683
684 // Sets the selection state for an object.
setSelectionState(SelectionState state)685 virtual void setSelectionState(SelectionState state) { m_selectionState = state; }
686
687 // A single rectangle that encompasses all of the selected objects within this object. Used to determine the tightest
688 // possible bounding box for the selection.
689 IntRect selectionRect(bool clipToVisibleContent = true) { return selectionRectForRepaint(0, clipToVisibleContent); }
690 virtual IntRect selectionRectForRepaint(RenderBoxModelObject* /*repaintContainer*/, bool /*clipToVisibleContent*/ = true) { return IntRect(); }
691
692 // Whether or not an object can be part of the leaf elements of the selection.
canBeSelectionLeaf()693 virtual bool canBeSelectionLeaf() const { return false; }
694
695 // Whether or not a block has selected children.
hasSelectedChildren()696 bool hasSelectedChildren() const { return m_selectionState != SelectionNone; }
697
698 // Obtains the selection colors that should be used when painting a selection.
699 Color selectionBackgroundColor() const;
700 Color selectionForegroundColor() const;
701 Color selectionEmphasisMarkColor() const;
702
703 // Whether or not a given block needs to paint selection gaps.
shouldPaintSelectionGaps()704 virtual bool shouldPaintSelectionGaps() const { return false; }
705
706 #if ENABLE(DRAG_SUPPORT)
707 Node* draggableNode(bool dhtmlOK, bool uaOK, int x, int y, bool& dhtmlWillDrag) const;
708 #endif
709
710 /**
711 * Returns the local coordinates of the caret within this render object.
712 * @param caretOffset zero-based offset determining position within the render object.
713 * @param extraWidthToEndOfLine optional out arg to give extra width to end of line -
714 * useful for character range rect computations
715 */
716 virtual IntRect localCaretRect(InlineBox*, int caretOffset, int* extraWidthToEndOfLine = 0);
717
isMarginBeforeQuirk()718 bool isMarginBeforeQuirk() const { return m_marginBeforeQuirk; }
isMarginAfterQuirk()719 bool isMarginAfterQuirk() const { return m_marginAfterQuirk; }
720 void setMarginBeforeQuirk(bool b = true) { m_marginBeforeQuirk = b; }
721 void setMarginAfterQuirk(bool b = true) { m_marginAfterQuirk = b; }
722
723 // When performing a global document tear-down, the renderer of the document is cleared. We use this
724 // as a hook to detect the case of document destruction and don't waste time doing unnecessary work.
725 bool documentBeingDestroyed() const;
726
727 virtual void destroy();
728
729 // Virtual function helpers for CSS3 Flexible Box Layout
isFlexibleBox()730 virtual bool isFlexibleBox() const { return false; }
isFlexingChildren()731 virtual bool isFlexingChildren() const { return false; }
isStretchingChildren()732 virtual bool isStretchingChildren() const { return false; }
733
isCombineText()734 virtual bool isCombineText() const { return false; }
735
736 virtual int caretMinOffset() const;
737 virtual int caretMaxOffset() const;
738 virtual unsigned caretMaxRenderedOffset() const;
739
740 virtual int previousOffset(int current) const;
741 virtual int previousOffsetForBackwardDeletion(int current) const;
742 virtual int nextOffset(int current) const;
743
744 virtual void imageChanged(CachedImage*, const IntRect* = 0);
745 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) { }
746 virtual bool willRenderImage(CachedImage*);
747
748 void selectionStartEnd(int& spos, int& epos) const;
749
hasOverrideSize()750 bool hasOverrideSize() const { return m_hasOverrideSize; }
setHasOverrideSize(bool b)751 void setHasOverrideSize(bool b) { m_hasOverrideSize = b; }
752
remove()753 void remove() { if (parent()) parent()->removeChild(this); }
754
755 AnimationController* animation() const;
756
visibleToHitTesting()757 bool visibleToHitTesting() const { return style()->visibility() == VISIBLE && style()->pointerEvents() != PE_NONE; }
758
759 // Map points and quads through elements, potentially via 3d transforms. You should never need to call these directly; use
760 // localToAbsolute/absoluteToLocal methods instead.
761 virtual void mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool useTransforms, bool fixed, TransformState&) const;
762 virtual void mapAbsoluteToLocalPoint(bool fixed, bool useTransforms, TransformState&) const;
763
764 bool shouldUseTransformFromContainer(const RenderObject* container) const;
765 void getTransformFromContainer(const RenderObject* container, const IntSize& offsetInContainer, TransformationMatrix&) const;
766
addFocusRingRects(Vector<IntRect> &,int,int)767 virtual void addFocusRingRects(Vector<IntRect>&, int /*tx*/, int /*ty*/) { };
768
absoluteOutlineBounds()769 IntRect absoluteOutlineBounds() const
770 {
771 return outlineBoundsForRepaint(0);
772 }
773
774 protected:
775 // Overrides should call the superclass at the end
776 virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle);
777 // Overrides should call the superclass at the start
778 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
779
780 void drawLineForBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2, BoxSide,
781 Color, EBorderStyle, int adjbw1, int adjbw2, bool antialias = false);
782
783 void paintFocusRing(GraphicsContext*, int tx, int ty, RenderStyle*);
784 void paintOutline(GraphicsContext*, int tx, int ty, int w, int h);
785 void addPDFURLRect(GraphicsContext*, const IntRect&);
786
787 virtual IntRect viewRect() const;
788
789 void adjustRectForOutlineAndShadow(IntRect&) const;
790
791 void arenaDelete(RenderArena*, void* objectBase);
792
793 virtual IntRect outlineBoundsForRepaint(RenderBoxModelObject* /*repaintContainer*/, IntPoint* /*cachedOffsetToRepaintContainer*/ = 0) const { return IntRect(); }
794
795 class LayoutRepainter {
796 public:
797 LayoutRepainter(RenderObject& object, bool checkForRepaint, const IntRect* oldBounds = 0)
m_object(object)798 : m_object(object)
799 , m_repaintContainer(0)
800 , m_checkForRepaint(checkForRepaint)
801 {
802 if (m_checkForRepaint) {
803 m_repaintContainer = m_object.containerForRepaint();
804 m_oldBounds = oldBounds ? *oldBounds : m_object.clippedOverflowRectForRepaint(m_repaintContainer);
805 m_oldOutlineBox = m_object.outlineBoundsForRepaint(m_repaintContainer);
806 }
807 }
808
809 // Return true if it repainted.
repaintAfterLayout()810 bool repaintAfterLayout()
811 {
812 return m_checkForRepaint ? m_object.repaintAfterLayoutIfNeeded(m_repaintContainer, m_oldBounds, m_oldOutlineBox) : false;
813 }
814
checkForRepaint()815 bool checkForRepaint() const { return m_checkForRepaint; }
816
817 private:
818 RenderObject& m_object;
819 RenderBoxModelObject* m_repaintContainer;
820 IntRect m_oldBounds;
821 IntRect m_oldOutlineBox;
822 bool m_checkForRepaint;
823 };
824
825 private:
826 RenderStyle* firstLineStyleSlowCase() const;
827 StyleDifference adjustStyleDifference(StyleDifference, unsigned contextSensitiveProperties) const;
828
829 Color selectionColor(int colorProperty) const;
830
831 RefPtr<RenderStyle> m_style;
832
833 Node* m_node;
834
835 RenderObject* m_parent;
836 RenderObject* m_previous;
837 RenderObject* m_next;
838
839 #ifndef NDEBUG
840 bool m_hasAXObject;
841 bool m_setNeedsLayoutForbidden : 1;
842 #endif
843
844 // 32 bits have been used here. THERE ARE NO FREE BITS AVAILABLE.
845 bool m_needsLayout : 1;
846 bool m_needsPositionedMovementLayout :1;
847 bool m_normalChildNeedsLayout : 1;
848 bool m_posChildNeedsLayout : 1;
849 bool m_needsSimplifiedNormalFlowLayout : 1;
850 bool m_preferredLogicalWidthsDirty : 1;
851 bool m_floating : 1;
852
853 bool m_positioned : 1;
854 bool m_relPositioned : 1;
855 bool m_paintBackground : 1; // if the box has something to paint in the
856 // background painting phase (background, border, etc)
857
858 bool m_isAnonymous : 1;
859 bool m_isText : 1;
860 bool m_isBox : 1;
861 bool m_inline : 1;
862 bool m_replaced : 1;
863 bool m_horizontalWritingMode : 1;
864 bool m_isDragging : 1;
865
866 bool m_hasLayer : 1;
867 bool m_hasOverflowClip : 1; // Set in the case of overflow:auto/scroll/hidden
868 bool m_hasTransform : 1;
869 bool m_hasReflection : 1;
870
871 bool m_hasOverrideSize : 1;
872
873 public:
874 bool m_hasCounterNodeMap : 1;
875 bool m_everHadLayout : 1;
876
877 private:
878 // These bitfields are moved here from subclasses to pack them together
879 // from RenderBlock
880 bool m_childrenInline : 1;
881 bool m_marginBeforeQuirk : 1;
882 bool m_marginAfterQuirk : 1;
883 bool m_hasMarkupTruncation : 1;
884 unsigned m_selectionState : 3; // SelectionState
885 bool m_hasColumns : 1;
886
887 // from RenderTableCell
888 bool m_cellWidthChanged : 1;
889
890 private:
891 // Store state between styleWillChange and styleDidChange
892 static bool s_affectsParentBlock;
893 };
894
documentBeingDestroyed()895 inline bool RenderObject::documentBeingDestroyed() const
896 {
897 return !document()->renderer();
898 }
899
isBeforeContent()900 inline bool RenderObject::isBeforeContent() const
901 {
902 if (style()->styleType() != BEFORE)
903 return false;
904 // Text nodes don't have their own styles, so ignore the style on a text node.
905 if (isText() && !isBR())
906 return false;
907 return true;
908 }
909
isAfterContent()910 inline bool RenderObject::isAfterContent() const
911 {
912 if (style()->styleType() != AFTER)
913 return false;
914 // Text nodes don't have their own styles, so ignore the style on a text node.
915 if (isText() && !isBR())
916 return false;
917 return true;
918 }
919
setNeedsLayout(bool b,bool markParents)920 inline void RenderObject::setNeedsLayout(bool b, bool markParents)
921 {
922 bool alreadyNeededLayout = m_needsLayout;
923 m_needsLayout = b;
924 if (b) {
925 ASSERT(!isSetNeedsLayoutForbidden());
926 if (!alreadyNeededLayout) {
927 if (markParents)
928 markContainingBlocksForLayout();
929 if (hasLayer())
930 setLayerNeedsFullRepaint();
931 }
932 } else {
933 m_everHadLayout = true;
934 m_posChildNeedsLayout = false;
935 m_needsSimplifiedNormalFlowLayout = false;
936 m_normalChildNeedsLayout = false;
937 m_needsPositionedMovementLayout = false;
938 }
939 }
940
setChildNeedsLayout(bool b,bool markParents)941 inline void RenderObject::setChildNeedsLayout(bool b, bool markParents)
942 {
943 bool alreadyNeededLayout = m_normalChildNeedsLayout;
944 m_normalChildNeedsLayout = b;
945 if (b) {
946 ASSERT(!isSetNeedsLayoutForbidden());
947 if (!alreadyNeededLayout && markParents)
948 markContainingBlocksForLayout();
949 } else {
950 m_posChildNeedsLayout = false;
951 m_needsSimplifiedNormalFlowLayout = false;
952 m_normalChildNeedsLayout = false;
953 m_needsPositionedMovementLayout = false;
954 }
955 }
956
setNeedsPositionedMovementLayout()957 inline void RenderObject::setNeedsPositionedMovementLayout()
958 {
959 bool alreadyNeededLayout = m_needsPositionedMovementLayout;
960 m_needsPositionedMovementLayout = true;
961 ASSERT(!isSetNeedsLayoutForbidden());
962 if (!alreadyNeededLayout) {
963 markContainingBlocksForLayout();
964 if (hasLayer())
965 setLayerNeedsFullRepaint();
966 }
967 }
968
setNeedsSimplifiedNormalFlowLayout()969 inline void RenderObject::setNeedsSimplifiedNormalFlowLayout()
970 {
971 bool alreadyNeededLayout = m_needsSimplifiedNormalFlowLayout;
972 m_needsSimplifiedNormalFlowLayout = true;
973 ASSERT(!isSetNeedsLayoutForbidden());
974 if (!alreadyNeededLayout) {
975 markContainingBlocksForLayout();
976 if (hasLayer())
977 setLayerNeedsFullRepaint();
978 }
979 }
980
objectIsRelayoutBoundary(const RenderObject * obj)981 inline bool objectIsRelayoutBoundary(const RenderObject *obj)
982 {
983 // FIXME: In future it may be possible to broaden this condition in order to improve performance.
984 // Table cells are excluded because even when their CSS height is fixed, their height()
985 // may depend on their contents.
986 return obj->isTextControl()
987 || (obj->hasOverflowClip() && !obj->style()->width().isIntrinsicOrAuto() && !obj->style()->height().isIntrinsicOrAuto() && !obj->style()->height().isPercent() && !obj->isTableCell())
988 #if ENABLE(SVG)
989 || obj->isSVGRoot()
990 #endif
991 ;
992 }
993
markContainingBlocksForLayout(bool scheduleRelayout,RenderObject * newRoot)994 inline void RenderObject::markContainingBlocksForLayout(bool scheduleRelayout, RenderObject* newRoot)
995 {
996 ASSERT(!scheduleRelayout || !newRoot);
997
998 RenderObject* o = container();
999 RenderObject* last = this;
1000
1001 bool simplifiedNormalFlowLayout = needsSimplifiedNormalFlowLayout() && !selfNeedsLayout() && !normalChildNeedsLayout();
1002
1003 while (o) {
1004 // Don't mark the outermost object of an unrooted subtree. That object will be
1005 // marked when the subtree is added to the document.
1006 RenderObject* container = o->container();
1007 if (!container && !o->isRenderView())
1008 return;
1009 if (!last->isText() && (last->style()->position() == FixedPosition || last->style()->position() == AbsolutePosition)) {
1010 while (o && !o->isRenderBlock()) // Skip relatively positioned inlines and get to the enclosing RenderBlock.
1011 o = o->container();
1012 if (!o || o->m_posChildNeedsLayout)
1013 return;
1014 o->m_posChildNeedsLayout = true;
1015 simplifiedNormalFlowLayout = true;
1016 ASSERT(!o->isSetNeedsLayoutForbidden());
1017 } else if (simplifiedNormalFlowLayout) {
1018 if (o->m_needsSimplifiedNormalFlowLayout)
1019 return;
1020 o->m_needsSimplifiedNormalFlowLayout = true;
1021 ASSERT(!o->isSetNeedsLayoutForbidden());
1022 } else {
1023 if (o->m_normalChildNeedsLayout)
1024 return;
1025 o->m_normalChildNeedsLayout = true;
1026 ASSERT(!o->isSetNeedsLayoutForbidden());
1027 }
1028
1029 if (o == newRoot)
1030 return;
1031
1032 last = o;
1033 if (scheduleRelayout && objectIsRelayoutBoundary(last))
1034 break;
1035 o = container;
1036 }
1037
1038 if (scheduleRelayout)
1039 last->scheduleRelayout();
1040 }
1041
preservesNewline()1042 inline bool RenderObject::preservesNewline() const
1043 {
1044 #if ENABLE(SVG)
1045 if (isSVGInlineText())
1046 return false;
1047 #endif
1048
1049 return style()->preserveNewline();
1050 }
1051
makeMatrixRenderable(TransformationMatrix & matrix,bool has3DRendering)1052 inline void makeMatrixRenderable(TransformationMatrix& matrix, bool has3DRendering)
1053 {
1054 #if !ENABLE(3D_RENDERING)
1055 UNUSED_PARAM(has3DRendering);
1056 matrix.makeAffine();
1057 #else
1058 if (!has3DRendering)
1059 matrix.makeAffine();
1060 #endif
1061 }
1062
adjustForAbsoluteZoom(int value,RenderObject * renderer)1063 inline int adjustForAbsoluteZoom(int value, RenderObject* renderer)
1064 {
1065 return adjustForAbsoluteZoom(value, renderer->style());
1066 }
1067
adjustFloatPointForAbsoluteZoom(const FloatPoint & point,RenderObject * renderer)1068 inline FloatPoint adjustFloatPointForAbsoluteZoom(const FloatPoint& point, RenderObject* renderer)
1069 {
1070 // The result here is in floats, so we don't need the truncation hack from the integer version above.
1071 float zoomFactor = renderer->style()->effectiveZoom();
1072 if (zoomFactor == 1)
1073 return point;
1074 return FloatPoint(point.x() / zoomFactor, point.y() / zoomFactor);
1075 }
1076
adjustFloatQuadForAbsoluteZoom(FloatQuad & quad,RenderObject * renderer)1077 inline void adjustFloatQuadForAbsoluteZoom(FloatQuad& quad, RenderObject* renderer)
1078 {
1079 quad.setP1(adjustFloatPointForAbsoluteZoom(quad.p1(), renderer));
1080 quad.setP2(adjustFloatPointForAbsoluteZoom(quad.p2(), renderer));
1081 quad.setP3(adjustFloatPointForAbsoluteZoom(quad.p3(), renderer));
1082 quad.setP4(adjustFloatPointForAbsoluteZoom(quad.p4(), renderer));
1083 }
1084
adjustFloatRectForAbsoluteZoom(FloatRect & rect,RenderObject * renderer)1085 inline void adjustFloatRectForAbsoluteZoom(FloatRect& rect, RenderObject* renderer)
1086 {
1087 RenderStyle* style = renderer->style();
1088 rect.setX(adjustFloatForAbsoluteZoom(rect.x(), style));
1089 rect.setY(adjustFloatForAbsoluteZoom(rect.y(), style));
1090 rect.setWidth(adjustFloatForAbsoluteZoom(rect.width(), style));
1091 rect.setHeight(adjustFloatForAbsoluteZoom(rect.height(), style));
1092 }
1093
adjustFloatPointForPageScale(const FloatPoint & point,float pageScale)1094 inline FloatPoint adjustFloatPointForPageScale(const FloatPoint& point, float pageScale)
1095 {
1096 if (pageScale == 1)
1097 return point;
1098 return FloatPoint(point.x() / pageScale, point.y() / pageScale);
1099 }
1100
adjustFloatQuadForPageScale(FloatQuad & quad,float pageScale)1101 inline void adjustFloatQuadForPageScale(FloatQuad& quad, float pageScale)
1102 {
1103 if (pageScale == 1)
1104 return;
1105 quad.setP1(adjustFloatPointForPageScale(quad.p1(), pageScale));
1106 quad.setP2(adjustFloatPointForPageScale(quad.p2(), pageScale));
1107 quad.setP3(adjustFloatPointForPageScale(quad.p3(), pageScale));
1108 quad.setP4(adjustFloatPointForPageScale(quad.p4(), pageScale));
1109 }
1110
adjustFloatRectForPageScale(FloatRect & rect,float pageScale)1111 inline void adjustFloatRectForPageScale(FloatRect& rect, float pageScale)
1112 {
1113 if (pageScale == 1)
1114 return;
1115 rect.setX(rect.x() / pageScale);
1116 rect.setY(rect.y() / pageScale);
1117 rect.setWidth(rect.width() / pageScale);
1118 rect.setHeight(rect.height() / pageScale);
1119 }
1120
1121 } // namespace WebCore
1122
1123 #ifndef NDEBUG
1124 // Outside the WebCore namespace for ease of invocation from gdb.
1125 void showTree(const WebCore::RenderObject*);
1126 void showRenderTree(const WebCore::RenderObject* object1);
1127 // We don't make object2 an optional parameter so that showRenderTree
1128 // can be called from gdb easily.
1129 void showRenderTree(const WebCore::RenderObject* object1, const WebCore::RenderObject* object2);
1130 #endif
1131
1132 #endif // RenderObject_h
1133