1 /* 2 * Copyright (C) 2000 Lars Knoll (knoll (at) kde.org) 3 * (C) 2000 Antti Koivisto (koivisto (at) kde.org) 4 * (C) 2000 Dirk Mueller (mueller (at) kde.org) 5 * (C) 2004 Allan Sandfeld Jensen (kde (at) carewolf.com) 6 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 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 "core/dom/DocumentLifecycle.h" 30 #include "core/dom/Element.h" 31 #include "core/dom/Position.h" 32 #include "core/dom/StyleEngine.h" 33 #include "core/fetch/ImageResourceClient.h" 34 #include "core/rendering/compositing/CompositingState.h" 35 #include "core/rendering/PaintPhase.h" 36 #include "core/rendering/RenderObjectChildList.h" 37 #include "core/rendering/ScrollAlignment.h" 38 #include "core/rendering/SubtreeLayoutScope.h" 39 #include "core/rendering/compositing/CompositingTriggers.h" 40 #include "core/rendering/style/RenderStyle.h" 41 #include "core/rendering/style/StyleInheritedData.h" 42 #include "platform/geometry/FloatQuad.h" 43 #include "platform/geometry/LayoutRect.h" 44 #include "platform/graphics/CompositingReasons.h" 45 #include "platform/transforms/TransformationMatrix.h" 46 47 namespace WebCore { 48 49 class AffineTransform; 50 class Cursor; 51 class Document; 52 class HitTestLocation; 53 class HitTestResult; 54 class InlineBox; 55 class InlineFlowBox; 56 class Position; 57 class PseudoStyleRequest; 58 class RenderBoxModelObject; 59 class RenderBlock; 60 class RenderFlowThread; 61 class RenderGeometryMap; 62 class RenderLayer; 63 class RenderLayerModelObject; 64 class RenderView; 65 class TransformState; 66 67 struct PaintInfo; 68 69 enum CursorDirective { 70 SetCursorBasedOnStyle, 71 SetCursor, 72 DoNotSetCursor 73 }; 74 75 enum HitTestFilter { 76 HitTestAll, 77 HitTestSelf, 78 HitTestDescendants 79 }; 80 81 enum HitTestAction { 82 HitTestBlockBackground, 83 HitTestChildBlockBackground, 84 HitTestChildBlockBackgrounds, 85 HitTestFloat, 86 HitTestForeground 87 }; 88 89 // Sides used when drawing borders and outlines. The values should run clockwise from top. 90 enum BoxSide { 91 BSTop, 92 BSRight, 93 BSBottom, 94 BSLeft 95 }; 96 97 enum MarkingBehavior { 98 MarkOnlyThis, 99 MarkContainingBlockChain, 100 }; 101 102 enum MapCoordinatesMode { 103 IsFixed = 1 << 0, 104 UseTransforms = 1 << 1, 105 ApplyContainerFlip = 1 << 2, 106 TraverseDocumentBoundaries = 1 << 3, 107 }; 108 typedef unsigned MapCoordinatesFlags; 109 110 enum InvalidationReason { 111 InvalidationIncremental, 112 InvalidationSelfLayout, 113 InvalidationBorderFitLines, 114 InvalidationBorderRadius, 115 InvalidationBoundsChangeWithBackground, 116 InvalidationBoundsChange, 117 InvalidationLocationChange, 118 InvalidationScroll, 119 InvalidationSelection, 120 InvalidationLayer, 121 InvalidationPaint, 122 InvalidationPaintRectangle 123 }; 124 125 const int caretWidth = 1; 126 127 struct AnnotatedRegionValue { 128 bool operator==(const AnnotatedRegionValue& o) const 129 { 130 return draggable == o.draggable && bounds == o.bounds; 131 } 132 133 LayoutRect bounds; 134 bool draggable; 135 }; 136 137 typedef WTF::HashMap<const RenderLayer*, Vector<LayoutRect> > LayerHitTestRects; 138 139 #ifndef NDEBUG 140 const int showTreeCharacterOffset = 39; 141 #endif 142 143 // Base class for all rendering tree objects. 144 class RenderObject : public ImageResourceClient { 145 friend class RenderBlock; 146 friend class RenderBlockFlow; 147 friend class RenderLayerReflectionInfo; // For setParent 148 friend class RenderLayerScrollableArea; // For setParent. 149 friend class RenderObjectChildList; 150 WTF_MAKE_NONCOPYABLE(RenderObject); 151 public: 152 // Anonymous objects should pass the document as their node, and they will then automatically be 153 // marked as anonymous in the constructor. 154 explicit RenderObject(Node*); 155 virtual ~RenderObject(); 156 157 virtual const char* renderName() const = 0; 158 159 String debugName() const; 160 161 RenderObject* parent() const { return m_parent; } 162 bool isDescendantOf(const RenderObject*) const; 163 164 RenderObject* previousSibling() const { return m_previous; } 165 RenderObject* nextSibling() const { return m_next; } 166 167 RenderObject* slowFirstChild() const 168 { 169 if (const RenderObjectChildList* children = virtualChildren()) 170 return children->firstChild(); 171 return 0; 172 } 173 RenderObject* slowLastChild() const 174 { 175 if (const RenderObjectChildList* children = virtualChildren()) 176 return children->lastChild(); 177 return 0; 178 } 179 180 virtual RenderObjectChildList* virtualChildren() { return 0; } 181 virtual const RenderObjectChildList* virtualChildren() const { return 0; } 182 183 RenderObject* nextInPreOrder() const; 184 RenderObject* nextInPreOrder(const RenderObject* stayWithin) const; 185 RenderObject* nextInPreOrderAfterChildren() const; 186 RenderObject* nextInPreOrderAfterChildren(const RenderObject* stayWithin) const; 187 RenderObject* previousInPreOrder() const; 188 RenderObject* previousInPreOrder(const RenderObject* stayWithin) const; 189 RenderObject* childAt(unsigned) const; 190 191 RenderObject* lastLeafChild() const; 192 193 // The following six functions are used when the render tree hierarchy changes to make sure layers get 194 // properly added and removed. Since containership can be implemented by any subclass, and since a hierarchy 195 // can contain a mixture of boxes and other object types, these functions need to be in the base class. 196 RenderLayer* enclosingLayer() const; 197 void addLayers(RenderLayer* parentLayer); 198 void removeLayers(RenderLayer* parentLayer); 199 void moveLayers(RenderLayer* oldParent, RenderLayer* newParent); 200 RenderLayer* findNextLayer(RenderLayer* parentLayer, RenderObject* startPoint, bool checkParent = true); 201 202 // Scrolling is a RenderBox concept, however some code just cares about recursively scrolling our enclosing ScrollableArea(s). 203 bool scrollRectToVisible(const LayoutRect&, const ScrollAlignment& alignX = ScrollAlignment::alignCenterIfNeeded, const ScrollAlignment& alignY = ScrollAlignment::alignCenterIfNeeded); 204 205 // Convenience function for getting to the nearest enclosing box of a RenderObject. 206 RenderBox* enclosingBox() const; 207 RenderBoxModelObject* enclosingBoxModelObject() const; 208 209 RenderBox* enclosingScrollableBox() const; 210 211 // Function to return our enclosing flow thread if we are contained inside one. This 212 // function follows the containing block chain. 213 RenderFlowThread* flowThreadContainingBlock() const 214 { 215 if (flowThreadState() == NotInsideFlowThread) 216 return 0; 217 return locateFlowThreadContainingBlock(); 218 } 219 220 #ifndef NDEBUG 221 void setHasAXObject(bool flag) { m_hasAXObject = flag; } 222 bool hasAXObject() const { return m_hasAXObject; } 223 224 // Helper class forbidding calls to setNeedsLayout() during its lifetime. 225 class SetLayoutNeededForbiddenScope { 226 public: 227 explicit SetLayoutNeededForbiddenScope(RenderObject&); 228 ~SetLayoutNeededForbiddenScope(); 229 private: 230 RenderObject& m_renderObject; 231 bool m_preexistingForbidden; 232 }; 233 234 void assertRendererLaidOut() const 235 { 236 if (needsLayout()) 237 showRenderTreeForThis(); 238 ASSERT_WITH_SECURITY_IMPLICATION(!needsLayout()); 239 } 240 241 void assertSubtreeIsLaidOut() const 242 { 243 for (const RenderObject* renderer = this; renderer; renderer = renderer->nextInPreOrder()) 244 renderer->assertRendererLaidOut(); 245 } 246 247 #endif 248 249 // Obtains the nearest enclosing block (including this block) that contributes a first-line style to our inline 250 // children. 251 virtual RenderBlock* firstLineBlock() const; 252 253 // Called when an object that was floating or positioned becomes a normal flow object 254 // again. We have to make sure the render tree updates as needed to accommodate the new 255 // normal flow object. 256 void handleDynamicFloatPositionChange(); 257 258 // RenderObject tree manipulation 259 ////////////////////////////////////////// 260 virtual bool canHaveChildren() const { return virtualChildren(); } 261 virtual bool canHaveGeneratedChildren() const; 262 virtual bool isChildAllowed(RenderObject*, RenderStyle*) const { return true; } 263 virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0); 264 virtual void addChildIgnoringContinuation(RenderObject* newChild, RenderObject* beforeChild = 0) { return addChild(newChild, beforeChild); } 265 virtual void removeChild(RenderObject*); 266 virtual bool createsAnonymousWrapper() const { return false; } 267 ////////////////////////////////////////// 268 269 protected: 270 ////////////////////////////////////////// 271 // Helper functions. Dangerous to use! 272 void setPreviousSibling(RenderObject* previous) { m_previous = previous; } 273 void setNextSibling(RenderObject* next) { m_next = next; } 274 void setParent(RenderObject* parent) 275 { 276 m_parent = parent; 277 278 // Only update if our flow thread state is different from our new parent and if we're not a RenderFlowThread. 279 // A RenderFlowThread is always considered to be inside itself, so it never has to change its state 280 // in response to parent changes. 281 FlowThreadState newState = parent ? parent->flowThreadState() : NotInsideFlowThread; 282 if (newState != flowThreadState() && !isRenderFlowThread()) 283 setFlowThreadStateIncludingDescendants(newState); 284 } 285 286 ////////////////////////////////////////// 287 private: 288 #ifndef NDEBUG 289 bool isSetNeedsLayoutForbidden() const { return m_setNeedsLayoutForbidden; } 290 void setNeedsLayoutIsForbidden(bool flag) { m_setNeedsLayoutForbidden = flag; } 291 #endif 292 293 void addAbsoluteRectForLayer(LayoutRect& result); 294 void setLayerNeedsFullPaintInvalidationForPositionedMovementLayout(); 295 bool requiresAnonymousTableWrappers(const RenderObject*) const; 296 297 // Gets pseudoStyle from Shadow host(in case of input elements) 298 // or from Parent element. 299 PassRefPtr<RenderStyle> getUncachedPseudoStyleFromParentOrShadowHost() const; 300 301 public: 302 #ifndef NDEBUG 303 void showTreeForThis() const; 304 void showRenderTreeForThis() const; 305 void showLineTreeForThis() const; 306 307 void showRenderObject() const; 308 // We don't make printedCharacters an optional parameter so that 309 // showRenderObject can be called from gdb easily. 310 void showRenderObject(int printedCharacters) const; 311 void showRenderTreeAndMark(const RenderObject* markedObject1 = 0, const char* markedLabel1 = 0, const RenderObject* markedObject2 = 0, const char* markedLabel2 = 0, int depth = 0) const; 312 #endif 313 314 static RenderObject* createObject(Element*, RenderStyle*); 315 316 // RenderObjects are allocated out of the rendering partition. 317 void* operator new(size_t); 318 void operator delete(void*); 319 320 public: 321 bool isPseudoElement() const { return node() && node()->isPseudoElement(); } 322 323 virtual bool isBoxModelObject() const { return false; } 324 virtual bool isBR() const { return false; } 325 virtual bool isCanvas() const { return false; } 326 virtual bool isCounter() const { return false; } 327 virtual bool isDetailsMarker() const { return false; } 328 virtual bool isEmbeddedObject() const { return false; } 329 virtual bool isFieldset() const { return false; } 330 virtual bool isFileUploadControl() const { return false; } 331 virtual bool isFrame() const { return false; } 332 virtual bool isFrameSet() const { return false; } 333 virtual bool isImage() const { return false; } 334 virtual bool isInlineBlockOrInlineTable() const { return false; } 335 virtual bool isLayerModelObject() const { return false; } 336 virtual bool isListBox() const { return false; } 337 virtual bool isListItem() const { return false; } 338 virtual bool isListMarker() const { return false; } 339 virtual bool isMarquee() const { return false; } 340 virtual bool isMedia() const { return false; } 341 virtual bool isMenuList() const { return false; } 342 virtual bool isMeter() const { return false; } 343 virtual bool isProgress() const { return false; } 344 virtual bool isQuote() const { return false; } 345 virtual bool isRenderBlock() const { return false; } 346 virtual bool isRenderBlockFlow() const { return false; } 347 virtual bool isRenderButton() const { return false; } 348 virtual bool isRenderFlowThread() const { return false; } 349 virtual bool isRenderFullScreen() const { return false; } 350 virtual bool isRenderFullScreenPlaceholder() const { return false; } 351 virtual bool isRenderGrid() const { return false; } 352 virtual bool isRenderIFrame() const { return false; } 353 virtual bool isRenderImage() const { return false; } 354 virtual bool isRenderInline() const { return false; } 355 virtual bool isRenderMultiColumnSet() const { return false; } 356 virtual bool isRenderPart() const { return false; } 357 virtual bool isRenderRegion() const { return false; } 358 virtual bool isRenderScrollbarPart() const { return false; } 359 virtual bool isRenderTableCol() const { return false; } 360 virtual bool isRenderView() const { return false; } 361 virtual bool isReplica() const { return false; } 362 virtual bool isRuby() const { return false; } 363 virtual bool isRubyBase() const { return false; } 364 virtual bool isRubyRun() const { return false; } 365 virtual bool isRubyText() const { return false; } 366 virtual bool isSlider() const { return false; } 367 virtual bool isSliderThumb() const { return false; } 368 virtual bool isTable() const { return false; } 369 virtual bool isTableCaption() const { return false; } 370 virtual bool isTableCell() const { return false; } 371 virtual bool isTableRow() const { return false; } 372 virtual bool isTableSection() const { return false; } 373 virtual bool isTextArea() const { return false; } 374 virtual bool isTextControl() const { return false; } 375 virtual bool isTextField() const { return false; } 376 virtual bool isVideo() const { return false; } 377 virtual bool isWidget() const { return false; } 378 379 bool isDocumentElement() const { return document().documentElement() == m_node; } 380 // isBody is called from RenderBox::styleWillChange and is thus quite hot. 381 bool isBody() const { return node() && node()->hasTagName(HTMLNames::bodyTag); } 382 bool isHR() const; 383 bool isLegend() const; 384 385 bool isTablePart() const { return isTableCell() || isRenderTableCol() || isTableCaption() || isTableRow() || isTableSection(); } 386 387 inline bool isBeforeContent() const; 388 inline bool isAfterContent() const; 389 inline bool isBeforeOrAfterContent() const; 390 static inline bool isAfterContent(const RenderObject* obj) { return obj && obj->isAfterContent(); } 391 392 bool hasCounterNodeMap() const { return m_bitfields.hasCounterNodeMap(); } 393 void setHasCounterNodeMap(bool hasCounterNodeMap) { m_bitfields.setHasCounterNodeMap(hasCounterNodeMap); } 394 bool everHadLayout() const { return m_bitfields.everHadLayout(); } 395 396 bool childrenInline() const { return m_bitfields.childrenInline(); } 397 void setChildrenInline(bool b) { m_bitfields.setChildrenInline(b); } 398 bool hasColumns() const { return m_bitfields.hasColumns(); } 399 void setHasColumns(bool b = true) { m_bitfields.setHasColumns(b); } 400 401 bool ancestorLineBoxDirty() const { return m_bitfields.ancestorLineBoxDirty(); } 402 void setAncestorLineBoxDirty(bool value = true) 403 { 404 m_bitfields.setAncestorLineBoxDirty(value); 405 if (value) 406 setNeedsLayoutAndFullPaintInvalidation(); 407 } 408 409 enum FlowThreadState { 410 NotInsideFlowThread = 0, 411 InsideOutOfFlowThread = 1, 412 InsideInFlowThread = 2, 413 }; 414 415 void setFlowThreadStateIncludingDescendants(FlowThreadState); 416 417 FlowThreadState flowThreadState() const { return m_bitfields.flowThreadState(); } 418 void setFlowThreadState(FlowThreadState state) { m_bitfields.setFlowThreadState(state); } 419 420 // FIXME: Until all SVG renders can be subclasses of RenderSVGModelObject we have 421 // to add SVG renderer methods to RenderObject with an ASSERT_NOT_REACHED() default implementation. 422 virtual bool isSVG() const { return false; } 423 virtual bool isSVGRoot() const { return false; } 424 virtual bool isSVGContainer() const { return false; } 425 virtual bool isSVGTransformableContainer() const { return false; } 426 virtual bool isSVGViewportContainer() const { return false; } 427 virtual bool isSVGGradientStop() const { return false; } 428 virtual bool isSVGHiddenContainer() const { return false; } 429 virtual bool isSVGPath() const { return false; } 430 virtual bool isSVGShape() const { return false; } 431 virtual bool isSVGText() const { return false; } 432 virtual bool isSVGTextPath() const { return false; } 433 virtual bool isSVGInline() const { return false; } 434 virtual bool isSVGInlineText() const { return false; } 435 virtual bool isSVGImage() const { return false; } 436 virtual bool isSVGForeignObject() const { return false; } 437 virtual bool isSVGResourceContainer() const { return false; } 438 virtual bool isSVGResourceFilter() const { return false; } 439 virtual bool isSVGResourceFilterPrimitive() const { return false; } 440 441 // FIXME: Those belong into a SVG specific base-class for all renderers (see above) 442 // Unfortunately we don't have such a class yet, because it's not possible for all renderers 443 // to inherit from RenderSVGObject -> RenderObject (some need RenderBlock inheritance for instance) 444 virtual void setNeedsTransformUpdate() { } 445 virtual void setNeedsBoundariesUpdate(); 446 447 // Per SVG 1.1 objectBoundingBox ignores clipping, masking, filter effects, opacity and stroke-width. 448 // This is used for all computation of objectBoundingBox relative units and by SVGLocatable::getBBox(). 449 // NOTE: Markers are not specifically ignored here by SVG 1.1 spec, but we ignore them 450 // since stroke-width is ignored (and marker size can depend on stroke-width). 451 // objectBoundingBox is returned local coordinates. 452 // The name objectBoundingBox is taken from the SVG 1.1 spec. 453 virtual FloatRect objectBoundingBox() const; 454 virtual FloatRect strokeBoundingBox() const; 455 456 // Returns the smallest rectangle enclosing all of the painted content 457 // respecting clipping, masking, filters, opacity, stroke-width and markers 458 virtual FloatRect paintInvalidationRectInLocalCoordinates() const; 459 460 // This only returns the transform="" value from the element 461 // most callsites want localToParentTransform() instead. 462 virtual AffineTransform localTransform() const; 463 464 // Returns the full transform mapping from local coordinates to local coords for the parent SVG renderer 465 // This includes any viewport transforms and x/y offsets as well as the transform="" value off the element. 466 virtual const AffineTransform& localToParentTransform() const; 467 468 // SVG uses FloatPoint precise hit testing, and passes the point in parent 469 // coordinates instead of in paint invalidaiton container coordinates. Eventually the 470 // rest of the rendering tree will move to a similar model. 471 virtual bool nodeAtFloatPoint(const HitTestRequest&, HitTestResult&, const FloatPoint& pointInParent, HitTestAction); 472 473 virtual bool canHaveWhitespaceChildren() const 474 { 475 if (isTable() || isTableRow() || isTableSection() || isRenderTableCol() || isFrameSet() || isFlexibleBox() || isRenderGrid()) 476 return false; 477 return true; 478 } 479 480 bool isAnonymous() const { return m_bitfields.isAnonymous(); } 481 bool isAnonymousBlock() const 482 { 483 // This function is kept in sync with anonymous block creation conditions in 484 // RenderBlock::createAnonymousBlock(). This includes creating an anonymous 485 // RenderBlock having a BLOCK or BOX display. Other classes such as RenderTextFragment 486 // are not RenderBlocks and will return false. See https://bugs.webkit.org/show_bug.cgi?id=56709. 487 return isAnonymous() && (style()->display() == BLOCK || style()->display() == BOX) && style()->styleType() == NOPSEUDO && isRenderBlock() && !isListMarker() && !isRenderFlowThread() 488 && !isRenderFullScreen() 489 && !isRenderFullScreenPlaceholder(); 490 } 491 bool isAnonymousColumnsBlock() const { return style()->specifiesColumns() && isAnonymousBlock(); } 492 bool isAnonymousColumnSpanBlock() const { return style()->columnSpan() && isAnonymousBlock(); } 493 bool isElementContinuation() const { return node() && node()->renderer() != this; } 494 bool isInlineElementContinuation() const { return isElementContinuation() && isInline(); } 495 virtual RenderBoxModelObject* virtualContinuation() const { return 0; } 496 497 bool isFloating() const { return m_bitfields.floating(); } 498 499 bool isOutOfFlowPositioned() const { return m_bitfields.isOutOfFlowPositioned(); } // absolute or fixed positioning 500 bool isInFlowPositioned() const { return m_bitfields.isRelPositioned() || m_bitfields.isStickyPositioned(); } // relative or sticky positioning 501 bool isRelPositioned() const { return m_bitfields.isRelPositioned(); } // relative positioning 502 bool isStickyPositioned() const { return m_bitfields.isStickyPositioned(); } 503 bool isPositioned() const { return m_bitfields.isPositioned(); } 504 505 bool isText() const { return m_bitfields.isText(); } 506 bool isBox() const { return m_bitfields.isBox(); } 507 bool isInline() const { return m_bitfields.isInline(); } // inline object 508 bool isDragging() const { return m_bitfields.isDragging(); } 509 bool isReplaced() const { return m_bitfields.isReplaced(); } // a "replaced" element (see CSS) 510 bool isHorizontalWritingMode() const { return m_bitfields.horizontalWritingMode(); } 511 512 bool hasLayer() const { return m_bitfields.hasLayer(); } 513 514 enum BoxDecorationState { 515 NoBoxDecorations, 516 HasBoxDecorationsAndBackgroundObscurationStatusInvalid, 517 HasBoxDecorationsAndBackgroundIsKnownToBeObscured, 518 HasBoxDecorationsAndBackgroundMayBeVisible, 519 }; 520 bool hasBoxDecorations() const { return m_bitfields.boxDecorationState() != NoBoxDecorations; } 521 bool backgroundIsKnownToBeObscured(); 522 bool canRenderBorderImage() const; 523 bool mustInvalidateBackgroundOrBorderPaintOnWidthChange() const; 524 bool mustInvalidateBackgroundOrBorderPaintOnHeightChange() const; 525 bool mustInvalidateFillLayersPaintOnWidthChange(const FillLayer&) const; 526 bool mustInvalidateFillLayersPaintOnHeightChange(const FillLayer&) const; 527 bool hasBackground() const { return style()->hasBackground(); } 528 bool hasEntirelyFixedBackground() const; 529 530 bool needsLayout() const 531 { 532 return m_bitfields.selfNeedsLayout() || m_bitfields.normalChildNeedsLayout() || m_bitfields.posChildNeedsLayout() 533 || m_bitfields.needsSimplifiedNormalFlowLayout() || m_bitfields.needsPositionedMovementLayout(); 534 } 535 536 bool selfNeedsLayout() const { return m_bitfields.selfNeedsLayout(); } 537 bool needsPositionedMovementLayout() const { return m_bitfields.needsPositionedMovementLayout(); } 538 bool needsPositionedMovementLayoutOnly() const 539 { 540 return m_bitfields.needsPositionedMovementLayout() && !m_bitfields.selfNeedsLayout() && !m_bitfields.normalChildNeedsLayout() 541 && !m_bitfields.posChildNeedsLayout() && !m_bitfields.needsSimplifiedNormalFlowLayout(); 542 } 543 544 bool posChildNeedsLayout() const { return m_bitfields.posChildNeedsLayout(); } 545 bool needsSimplifiedNormalFlowLayout() const { return m_bitfields.needsSimplifiedNormalFlowLayout(); } 546 bool normalChildNeedsLayout() const { return m_bitfields.normalChildNeedsLayout(); } 547 548 bool preferredLogicalWidthsDirty() const { return m_bitfields.preferredLogicalWidthsDirty(); } 549 550 bool needsOverflowRecalcAfterStyleChange() const { return m_bitfields.selfNeedsOverflowRecalcAfterStyleChange() || m_bitfields.childNeedsOverflowRecalcAfterStyleChange(); } 551 bool selfNeedsOverflowRecalcAfterStyleChange() const { return m_bitfields.selfNeedsOverflowRecalcAfterStyleChange(); } 552 bool childNeedsOverflowRecalcAfterStyleChange() const { return m_bitfields.childNeedsOverflowRecalcAfterStyleChange(); } 553 554 bool isSelectionBorder() const; 555 556 bool hasClip() const { return isOutOfFlowPositioned() && style()->hasClip(); } 557 bool hasOverflowClip() const { return m_bitfields.hasOverflowClip(); } 558 bool hasClipOrOverflowClip() const { return hasClip() || hasOverflowClip(); } 559 560 bool hasTransform() const { return m_bitfields.hasTransform(); } 561 bool hasMask() const { return style() && style()->hasMask(); } 562 bool hasClipPath() const { return style() && style()->clipPath(); } 563 bool hasHiddenBackface() const { return style() && style()->backfaceVisibility() == BackfaceVisibilityHidden; } 564 565 bool hasFilter() const { return style() && style()->hasFilter(); } 566 567 bool hasBlendMode() const; 568 569 bool hasShapeOutside() const { return style() && style()->shapeOutside(); } 570 571 inline bool preservesNewline() const; 572 573 // The pseudo element style can be cached or uncached. Use the cached method if the pseudo element doesn't respect 574 // any pseudo classes (and therefore has no concept of changing state). 575 RenderStyle* getCachedPseudoStyle(PseudoId, RenderStyle* parentStyle = 0) const; 576 PassRefPtr<RenderStyle> getUncachedPseudoStyle(const PseudoStyleRequest&, RenderStyle* parentStyle = 0, RenderStyle* ownStyle = 0) const; 577 578 virtual void updateDragState(bool dragOn); 579 580 RenderView* view() const { return document().renderView(); }; 581 FrameView* frameView() const { return document().view(); }; 582 583 bool isRooted() const; 584 585 Node* node() const 586 { 587 return isAnonymous() ? 0 : m_node; 588 } 589 590 Node* nonPseudoNode() const 591 { 592 return isPseudoElement() ? 0 : node(); 593 } 594 595 // FIXME: Why does RenderWidget need this? 596 void clearNode() { m_node = 0; } 597 598 // Returns the styled node that caused the generation of this renderer. 599 // This is the same as node() except for renderers of :before and :after 600 // pseudo elements for which their parent node is returned. 601 Node* generatingNode() const { return isPseudoElement() ? node()->parentOrShadowHostNode() : node(); } 602 603 Document& document() const { return m_node->document(); } 604 LocalFrame* frame() const { return document().frame(); } 605 606 bool hasOutlineAnnotation() const; 607 bool hasOutline() const { return style()->hasOutline() || hasOutlineAnnotation(); } 608 609 // Returns the object containing this one. Can be different from parent for positioned elements. 610 // If paintInvalidationContainer and paintInvalidationContainerSkipped are not null, on return *paintInvalidationContainerSkipped 611 // is true if the renderer returned is an ancestor of paintInvalidationContainer. 612 RenderObject* container(const RenderLayerModelObject* paintInvalidationContainer = 0, bool* paintInvalidationContainerSkipped = 0) const; 613 614 virtual RenderObject* hoverAncestor() const { return parent(); } 615 616 Element* offsetParent() const; 617 618 void markContainingBlocksForLayout(bool scheduleRelayout = true, RenderObject* newRoot = 0, SubtreeLayoutScope* = 0); 619 void setNeedsLayout(MarkingBehavior = MarkContainingBlockChain, SubtreeLayoutScope* = 0); 620 void setNeedsLayoutAndFullPaintInvalidation(MarkingBehavior = MarkContainingBlockChain, SubtreeLayoutScope* = 0); 621 void clearNeedsLayout(); 622 void setChildNeedsLayout(MarkingBehavior = MarkContainingBlockChain, SubtreeLayoutScope* = 0); 623 void setNeedsPositionedMovementLayout(); 624 void setPreferredLogicalWidthsDirty(MarkingBehavior = MarkContainingBlockChain); 625 void clearPreferredLogicalWidthsDirty(); 626 void invalidateContainerPreferredLogicalWidths(); 627 628 void setNeedsLayoutAndPrefWidthsRecalc() 629 { 630 setNeedsLayout(); 631 setPreferredLogicalWidthsDirty(); 632 } 633 void setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation() 634 { 635 setNeedsLayoutAndFullPaintInvalidation(); 636 setPreferredLogicalWidthsDirty(); 637 } 638 639 void setPositionState(EPosition position) 640 { 641 ASSERT((position != AbsolutePosition && position != FixedPosition) || isBox()); 642 m_bitfields.setPositionedState(position); 643 } 644 void clearPositionedState() { m_bitfields.clearPositionedState(); } 645 646 void setFloating(bool isFloating) { m_bitfields.setFloating(isFloating); } 647 void setInline(bool isInline) { m_bitfields.setIsInline(isInline); } 648 649 void setHasBoxDecorations(bool); 650 void invalidateBackgroundObscurationStatus(); 651 virtual bool computeBackgroundIsKnownToBeObscured() { return false; } 652 653 void setIsText() { m_bitfields.setIsText(true); } 654 void setIsBox() { m_bitfields.setIsBox(true); } 655 void setReplaced(bool isReplaced) { m_bitfields.setIsReplaced(isReplaced); } 656 void setHorizontalWritingMode(bool hasHorizontalWritingMode) { m_bitfields.setHorizontalWritingMode(hasHorizontalWritingMode); } 657 void setHasOverflowClip(bool hasOverflowClip) { m_bitfields.setHasOverflowClip(hasOverflowClip); } 658 void setHasLayer(bool hasLayer) { m_bitfields.setHasLayer(hasLayer); } 659 void setHasTransform(bool hasTransform) { m_bitfields.setHasTransform(hasTransform); } 660 void setHasReflection(bool hasReflection) { m_bitfields.setHasReflection(hasReflection); } 661 662 void scheduleRelayout(); 663 664 void updateFillImages(const FillLayer*, const FillLayer*); 665 void updateImage(StyleImage*, StyleImage*); 666 void updateShapeImage(const ShapeValue*, const ShapeValue*); 667 668 virtual void paint(PaintInfo&, const LayoutPoint&); 669 670 // Subclasses must reimplement this method to compute the size and position 671 // of this object and all its descendants. 672 virtual void layout() = 0; 673 virtual bool updateImageLoadingPriorities() { return false; } 674 void setHasPendingResourceUpdate(bool hasPendingResourceUpdate) { m_bitfields.setHasPendingResourceUpdate(hasPendingResourceUpdate); } 675 bool hasPendingResourceUpdate() const { return m_bitfields.hasPendingResourceUpdate(); } 676 677 /* This function performs a layout only if one is needed. */ 678 void layoutIfNeeded() { if (needsLayout()) layout(); } 679 680 void forceLayout(); 681 void forceChildLayout(); 682 683 // Used for element state updates that cannot be fixed with a 684 // paint invalidation and do not need a relayout. 685 virtual void updateFromElement() { } 686 687 virtual void addAnnotatedRegions(Vector<AnnotatedRegionValue>&); 688 void collectAnnotatedRegions(Vector<AnnotatedRegionValue>&); 689 690 CompositingState compositingState() const; 691 virtual CompositingReasons additionalCompositingReasons(CompositingTriggerFlags) const; 692 693 bool hitTest(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestFilter = HitTestAll); 694 virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&); 695 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction); 696 697 virtual PositionWithAffinity positionForPoint(const LayoutPoint&); 698 PositionWithAffinity createPositionWithAffinity(int offset, EAffinity); 699 PositionWithAffinity createPositionWithAffinity(const Position&); 700 701 virtual void dirtyLinesFromChangedChild(RenderObject*); 702 703 // Set the style of the object and update the state of the object accordingly. 704 void setStyle(PassRefPtr<RenderStyle>); 705 706 // Set the style of the object if it's generated content. 707 void setPseudoStyle(PassRefPtr<RenderStyle>); 708 709 // Updates only the local style ptr of the object. Does not update the state of the object, 710 // and so only should be called when the style is known not to have changed (or from setStyle). 711 void setStyleInternal(PassRefPtr<RenderStyle> style) { m_style = style; } 712 713 // returns the containing block level element for this element. 714 RenderBlock* containingBlock() const; 715 RenderObject* clippingContainer() const; 716 717 bool canContainFixedPositionObjects() const 718 { 719 return isRenderView() || (hasTransform() && isRenderBlock()) || isSVGForeignObject(); 720 } 721 722 // Convert the given local point to absolute coordinates 723 // FIXME: Temporary. If UseTransforms is true, take transforms into account. Eventually localToAbsolute() will always be transform-aware. 724 FloatPoint localToAbsolute(const FloatPoint& localPoint = FloatPoint(), MapCoordinatesFlags = 0) const; 725 FloatPoint absoluteToLocal(const FloatPoint&, MapCoordinatesFlags = 0) const; 726 727 // Convert a local quad to absolute coordinates, taking transforms into account. 728 FloatQuad localToAbsoluteQuad(const FloatQuad& quad, MapCoordinatesFlags mode = 0, bool* wasFixed = 0) const 729 { 730 return localToContainerQuad(quad, 0, mode, wasFixed); 731 } 732 // Convert an absolute quad to local coordinates. 733 FloatQuad absoluteToLocalQuad(const FloatQuad&, MapCoordinatesFlags mode = 0) const; 734 735 // Convert a local quad into the coordinate system of container, taking transforms into account. 736 FloatQuad localToContainerQuad(const FloatQuad&, const RenderLayerModelObject* paintInvalidatinoContainer, MapCoordinatesFlags = 0, bool* wasFixed = 0) const; 737 FloatPoint localToContainerPoint(const FloatPoint&, const RenderLayerModelObject* paintInvalidationContainer, MapCoordinatesFlags = 0, bool* wasFixed = 0) const; 738 739 // Return the offset from the container() renderer (excluding transforms). In multi-column layout, 740 // different offsets apply at different points, so return the offset that applies to the given point. 741 virtual LayoutSize offsetFromContainer(const RenderObject*, const LayoutPoint&, bool* offsetDependsOnPoint = 0) const; 742 // Return the offset from an object up the container() chain. Asserts that none of the intermediate objects have transforms. 743 LayoutSize offsetFromAncestorContainer(const RenderObject*) const; 744 745 virtual void absoluteRects(Vector<IntRect>&, const LayoutPoint&) const { } 746 747 // Computes the position of the given render object in the space of |repaintContainer|. 748 LayoutPoint positionFromPaintInvalidationContainer(const RenderLayerModelObject* paintInvalidationContainer) const; 749 750 IntRect absoluteBoundingBoxRect() const; 751 // FIXME: This function should go away eventually 752 IntRect absoluteBoundingBoxRectIgnoringTransforms() const; 753 754 // Build an array of quads in absolute coords for line boxes 755 virtual void absoluteQuads(Vector<FloatQuad>&, bool* /*wasFixed*/ = 0) const { } 756 757 virtual void absoluteFocusRingQuads(Vector<FloatQuad>&); 758 759 static FloatRect absoluteBoundingBoxRectForRange(const Range*); 760 761 // the rect that will be painted if this object is passed as the paintingRoot 762 LayoutRect paintingRootRect(LayoutRect& topLevelRect); 763 764 virtual LayoutUnit minPreferredLogicalWidth() const { return 0; } 765 virtual LayoutUnit maxPreferredLogicalWidth() const { return 0; } 766 767 RenderStyle* style() const { return m_style.get(); } 768 RenderStyle* firstLineStyle() const { return document().styleEngine()->usesFirstLineRules() ? cachedFirstLineStyle() : style(); } 769 RenderStyle* style(bool firstLine) const { return firstLine ? firstLineStyle() : style(); } 770 771 inline Color resolveColor(const RenderStyle* styleToUse, int colorProperty) const 772 { 773 return styleToUse->visitedDependentColor(colorProperty); 774 } 775 776 inline Color resolveColor(int colorProperty) const 777 { 778 return style()->visitedDependentColor(colorProperty); 779 } 780 781 // Used only by Element::pseudoStyleCacheIsInvalid to get a first line style based off of a 782 // given new style, without accessing the cache. 783 PassRefPtr<RenderStyle> uncachedFirstLineStyle(RenderStyle*) const; 784 785 // Anonymous blocks that are part of of a continuation chain will return their inline continuation's outline style instead. 786 // This is typically only relevant when invalidating paints. 787 virtual RenderStyle* outlineStyleForPaintInvalidation() const { return style(); } 788 789 virtual CursorDirective getCursor(const LayoutPoint&, Cursor&) const; 790 791 struct AppliedTextDecoration { 792 Color color; 793 TextDecorationStyle style; 794 AppliedTextDecoration() : color(Color::transparent), style(TextDecorationStyleSolid) { } 795 }; 796 797 void getTextDecorations(unsigned decorations, AppliedTextDecoration& underline, AppliedTextDecoration& overline, AppliedTextDecoration& linethrough, bool quirksMode = false, bool firstlineStyle = false); 798 799 // Return the RenderLayerModelObject in the container chain which is responsible for painting this object, or 0 800 // if painting is root-relative. This is the container that should be passed to the 'forPaintInvalidation' 801 // methods. 802 const RenderLayerModelObject* containerForPaintInvalidation() const; 803 const RenderLayerModelObject* enclosingCompositedContainer() const; 804 const RenderLayerModelObject* adjustCompositedContainerForSpecialAncestors(const RenderLayerModelObject* paintInvalidationContainer) const; 805 bool isPaintInvalidationContainer() const; 806 807 LayoutRect computePaintInvalidationRect() 808 { 809 return computePaintInvalidationRect(containerForPaintInvalidation()); 810 } 811 812 // Returns the paint invalidation rect for this RenderObject in the coordinate space of the paint backing (typically a GraphicsLayer) for |paintInvalidationContainer|. 813 LayoutRect computePaintInvalidationRect(const RenderLayerModelObject* paintInvalidationContainer) const; 814 815 // Returns the rect bounds needed to invalidate the paint of this object, in the coordinate space of the rendering backing of |paintInvalidationContainer| 816 LayoutRect boundsRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer) const; 817 818 // Actually do the paint invalidate of rect r for this object which has been computed in the coordinate space 819 // of the GraphicsLayer backing of |paintInvalidationContainer|. Note that this coordinaten space is not the same 820 // as the local coordinate space of |paintInvalidationContainer| in the presence of layer squashing. 821 // If |paintInvalidationContainer| is 0, invalidate paints via the view. 822 // FIXME: |paintInvalidationContainer| should never be 0. See crbug.com/363699. 823 void invalidatePaintUsingContainer(const RenderLayerModelObject* paintInvalidationContainer, const IntRect&, InvalidationReason) const; 824 825 // Invalidate the paint of the entire object. Called when, e.g., the color of a border changes, or when a border 826 // style changes. 827 void paintInvalidationForWholeRenderer() const; 828 829 // Invalidate the paint of a specific subrectangle within a given object. The rect |r| is in the object's coordinate space. 830 void invalidatePaintRectangle(const LayoutRect&) const; 831 832 // Invalidate the paint only if our old bounds and new bounds are different. The caller may pass in newBounds if they are known. 833 bool invalidatePaintAfterLayoutIfNeeded(const RenderLayerModelObject* paintInvalidationContainer, bool wasSelfLayout, 834 const LayoutRect& oldBounds, const LayoutPoint& oldPositionFromPaintInvalidationContainer, 835 const LayoutRect* newBoundsPtr = 0, const LayoutPoint* newPositionFromPaintInvalidationContainer = 0); 836 837 // Walk the tree after layout issuing paint invalidations for renderers that have changed or moved, updating bounds that have changed, and clearing paint invalidation state. 838 virtual void invalidateTreeAfterLayout(const RenderLayerModelObject&); 839 840 virtual void invalidatePaintForOverflow(); 841 void invalidatePaintForOverflowIfNeeded(); 842 843 bool checkForPaintInvalidation() const; 844 bool checkForPaintInvalidationDuringLayout() const; 845 846 // Returns the rect that should have paint invalidated whenever this object changes. The rect is in the view's 847 // coordinate space. This method deals with outlines and overflow. 848 LayoutRect absoluteClippedOverflowRect() const 849 { 850 return clippedOverflowRectForPaintInvalidation(0); 851 } 852 IntRect pixelSnappedAbsoluteClippedOverflowRect() const; 853 virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer) const; 854 virtual LayoutRect rectWithOutlineForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, LayoutUnit outlineWidth) const; 855 856 // Given a rect in the object's coordinate space, compute a rect suitable for invalidating paints of 857 // that rect in the coordinate space of paintInvalidationContainer. 858 virtual void mapRectToPaintInvalidationBacking(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect&, bool fixed = false) const; 859 virtual void computeFloatRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, FloatRect& paintInvalidationRect, bool fixed = false) const; 860 861 // Return the offset to the column in which the specified point (in flow-thread coordinates) 862 // lives. This is used to convert a flow-thread point to a visual point. 863 virtual LayoutSize columnOffset(const LayoutPoint&) const { return LayoutSize(); } 864 865 virtual unsigned length() const { return 1; } 866 867 bool isFloatingOrOutOfFlowPositioned() const { return (isFloating() || isOutOfFlowPositioned()); } 868 869 bool isTransparent() const { return style()->opacity() < 1.0f; } 870 float opacity() const { return style()->opacity(); } 871 872 bool hasReflection() const { return m_bitfields.hasReflection(); } 873 874 enum SelectionState { 875 SelectionNone, // The object is not selected. 876 SelectionStart, // The object either contains the start of a selection run or is the start of a run 877 SelectionInside, // The object is fully encompassed by a selection run 878 SelectionEnd, // The object either contains the end of a selection run or is the end of a run 879 SelectionBoth // The object contains an entire run or is the sole selected object in that run 880 }; 881 882 // The current selection state for an object. For blocks, the state refers to the state of the leaf 883 // descendants (as described above in the SelectionState enum declaration). 884 SelectionState selectionState() const { return m_bitfields.selectionState(); } 885 virtual void setSelectionState(SelectionState state) { m_bitfields.setSelectionState(state); } 886 inline void setSelectionStateIfNeeded(SelectionState); 887 bool canUpdateSelectionOnRootLineBoxes(); 888 889 // A single rectangle that encompasses all of the selected objects within this object. Used to determine the tightest 890 // possible bounding box for the selection. 891 LayoutRect selectionRect(bool clipToVisibleContent = true) { return selectionRectForPaintInvalidation(0, clipToVisibleContent); } 892 virtual LayoutRect selectionRectForPaintInvalidation(const RenderLayerModelObject* /*paintInvalidationContainer*/, bool /*clipToVisibleContent*/ = true) { return LayoutRect(); } 893 894 virtual bool canBeSelectionLeaf() const { return false; } 895 bool hasSelectedChildren() const { return selectionState() != SelectionNone; } 896 897 bool isSelectable() const; 898 // Obtains the selection colors that should be used when painting a selection. 899 Color selectionBackgroundColor() const; 900 Color selectionForegroundColor() const; 901 Color selectionEmphasisMarkColor() const; 902 903 // Whether or not a given block needs to paint selection gaps. 904 virtual bool shouldPaintSelectionGaps() const { return false; } 905 906 /** 907 * Returns the local coordinates of the caret within this render object. 908 * @param caretOffset zero-based offset determining position within the render object. 909 * @param extraWidthToEndOfLine optional out arg to give extra width to end of line - 910 * useful for character range rect computations 911 */ 912 virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = 0); 913 914 // When performing a global document tear-down, the renderer of the document is cleared. We use this 915 // as a hook to detect the case of document destruction and don't waste time doing unnecessary work. 916 bool documentBeingDestroyed() const; 917 918 void destroyAndCleanupAnonymousWrappers(); 919 virtual void destroy(); 920 921 // Virtual function helpers for the deprecated Flexible Box Layout (display: -webkit-box). 922 virtual bool isDeprecatedFlexibleBox() const { return false; } 923 924 // Virtual function helper for the new FlexibleBox Layout (display: -webkit-flex). 925 virtual bool isFlexibleBox() const { return false; } 926 927 bool isFlexibleBoxIncludingDeprecated() const 928 { 929 return isFlexibleBox() || isDeprecatedFlexibleBox(); 930 } 931 932 virtual bool isCombineText() const { return false; } 933 934 virtual int caretMinOffset() const; 935 virtual int caretMaxOffset() const; 936 937 virtual int previousOffset(int current) const; 938 virtual int previousOffsetForBackwardDeletion(int current) const; 939 virtual int nextOffset(int current) const; 940 941 virtual void imageChanged(ImageResource*, const IntRect* = 0) OVERRIDE FINAL; 942 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) { } 943 virtual bool willRenderImage(ImageResource*) OVERRIDE FINAL; 944 945 void selectionStartEnd(int& spos, int& epos) const; 946 947 void remove() { if (parent()) parent()->removeChild(this); } 948 949 bool isInert() const; 950 951 bool supportsTouchAction() const; 952 953 bool visibleToHitTestRequest(const HitTestRequest& request) const { return style()->visibility() == VISIBLE && (request.ignorePointerEventsNone() || style()->pointerEvents() != PE_NONE) && !isInert(); } 954 955 bool visibleToHitTesting() const { return style()->visibility() == VISIBLE && style()->pointerEvents() != PE_NONE && !isInert(); } 956 957 // Map points and quads through elements, potentially via 3d transforms. You should never need to call these directly; use 958 // localToAbsolute/absoluteToLocal methods instead. 959 virtual void mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0) const; 960 virtual void mapAbsoluteToLocalPoint(MapCoordinatesFlags, TransformState&) const; 961 962 // Pushes state onto RenderGeometryMap about how to map coordinates from this renderer to its container, or ancestorToStopAt (whichever is encountered first). 963 // Returns the renderer which was mapped to (container or ancestorToStopAt). 964 virtual const RenderObject* pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&) const; 965 966 bool shouldUseTransformFromContainer(const RenderObject* container) const; 967 void getTransformFromContainer(const RenderObject* container, const LayoutSize& offsetInContainer, TransformationMatrix&) const; 968 969 bool createsGroup() const { return isTransparent() || hasMask() || hasFilter() || hasBlendMode(); } 970 971 virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& /* additionalOffset */, const RenderLayerModelObject* /* paintContainer */ = 0) { }; 972 973 // Compute a list of hit-test rectangles per layer rooted at this renderer. 974 virtual void computeLayerHitTestRects(LayerHitTestRects&) const; 975 976 // Return the renderer whose background style is used to paint the root background. Should only be called on the renderer for which isDocumentElement() is true. 977 RenderObject* rendererForRootBackground(); 978 979 RespectImageOrientationEnum shouldRespectImageOrientation() const; 980 981 bool isRelayoutBoundaryForInspector() const; 982 983 const LayoutRect& previousPaintInvalidationRect() const { return m_previousPaintInvalidationRect; } 984 void setPreviousPaintInvalidationRect(const LayoutRect& rect) { m_previousPaintInvalidationRect = rect; } 985 986 const LayoutPoint& previousPositionFromPaintInvalidationContainer() const { return m_previousPositionFromPaintInvalidationContainer; } 987 void setPreviousPositionFromPaintInvalidationContainer(const LayoutPoint& location) { m_previousPositionFromPaintInvalidationContainer = location; } 988 989 bool shouldDoFullPaintInvalidationAfterLayout() const { return m_bitfields.shouldDoFullPaintInvalidationAfterLayout(); } 990 void setShouldDoFullPaintInvalidationAfterLayout(bool b) { m_bitfields.setShouldDoFullPaintInvalidationAfterLayout(b); } 991 bool shouldInvalidateOverflowForPaint() const { return m_bitfields.shouldInvalidateOverflowForPaint(); } 992 993 bool shouldDoFullPaintInvalidationIfSelfPaintingLayer() const { return m_bitfields.shouldDoFullPaintInvalidationIfSelfPaintingLayer(); } 994 void setShouldDoFullPaintInvalidationIfSelfPaintingLayer(bool b) { m_bitfields.setShouldDoFullPaintInvalidationIfSelfPaintingLayer(b); } 995 996 bool onlyNeededPositionedMovementLayout() const { return m_bitfields.onlyNeededPositionedMovementLayout(); } 997 void setOnlyNeededPositionedMovementLayout(bool b) { m_bitfields.setOnlyNeededPositionedMovementLayout(b); } 998 999 void clearPaintInvalidationState(); 1000 1001 // layoutDidGetCalled indicates whether this render object was re-laid-out 1002 // since the last call to setLayoutDidGetCalled(false) on this object. 1003 bool layoutDidGetCalled() { return m_bitfields.layoutDidGetCalled(); } 1004 void setLayoutDidGetCalled(bool b) { m_bitfields.setLayoutDidGetCalled(b); } 1005 1006 bool mayNeedPaintInvalidation() { return m_bitfields.mayNeedPaintInvalidation(); } 1007 void setMayNeedPaintInvalidation(bool b) 1008 { 1009 m_bitfields.setMayNeedPaintInvalidation(b); 1010 1011 // Make sure our parent is marked as needing invalidation. 1012 if (b && parent() && !parent()->mayNeedPaintInvalidation()) 1013 parent()->setMayNeedPaintInvalidation(b); 1014 } 1015 1016 bool shouldCheckForPaintInvalidationAfterLayout() 1017 { 1018 return layoutDidGetCalled() || mayNeedPaintInvalidation(); 1019 } 1020 1021 bool supportsLayoutStateCachedOffsets() const { return !hasColumns() && !hasTransform() && !hasReflection() && !style()->isFlippedBlocksWritingMode(); } 1022 1023 void setNeedsOverflowRecalcAfterStyleChange(); 1024 void markContainingBlocksForOverflowRecalc(); 1025 1026 protected: 1027 inline bool layerCreationAllowedForSubtree() const; 1028 1029 // Overrides should call the superclass at the end. m_style will be 0 the first time 1030 // this function will be called. 1031 virtual void styleWillChange(StyleDifference, const RenderStyle& newStyle); 1032 // Overrides should call the superclass at the start. |oldStyle| will be 0 the first 1033 // time this function is called. 1034 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); 1035 void propagateStyleToAnonymousChildren(bool blockChildrenOnly = false); 1036 1037 void drawLineForBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2, BoxSide, 1038 Color, EBorderStyle, int adjbw1, int adjbw2, bool antialias = false); 1039 void drawDashedOrDottedBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2, 1040 BoxSide, Color, int thickness, EBorderStyle, bool antialias); 1041 void drawDoubleBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2, 1042 int length, BoxSide, Color, int thickness, int adjacentWidth1, int adjacentWidth2, bool antialias); 1043 void drawRidgeOrGrooveBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2, 1044 BoxSide, Color, EBorderStyle, int adjacentWidth1, int adjacentWidth2, bool antialias); 1045 void drawSolidBoxSide(GraphicsContext*, int x1, int y1, int x2, int y2, 1046 BoxSide, Color, int adjacentWidth1, int adjacentWidth2, bool antialias); 1047 1048 void paintFocusRing(PaintInfo&, const LayoutPoint&, RenderStyle*); 1049 void paintOutline(PaintInfo&, const LayoutRect&); 1050 void addPDFURLRect(GraphicsContext*, const LayoutRect&); 1051 void addChildFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer); 1052 1053 virtual LayoutRect viewRect() const; 1054 1055 void clearLayoutRootIfNeeded() const; 1056 virtual void willBeDestroyed(); 1057 void postDestroy(); 1058 1059 virtual void insertedIntoTree(); 1060 virtual void willBeRemovedFromTree(); 1061 1062 void setDocumentForAnonymous(Document* document) { ASSERT(isAnonymous()); m_node = document; } 1063 1064 // Add hit-test rects for the render tree rooted at this node to the provided collection on a 1065 // per-RenderLayer basis. 1066 // currentLayer must be the enclosing layer, and layerOffset is the current offset within 1067 // this layer. Subclass implementations will add any offset for this renderer within it's 1068 // container, so callers should provide only the offset of the container within it's layer. 1069 // containerRect is a rect that has already been added for the currentLayer which is likely to 1070 // be a container for child elements. Any rect wholly contained by containerRect can be 1071 // skipped. 1072 virtual void addLayerHitTestRects(LayerHitTestRects&, const RenderLayer* currentLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const; 1073 1074 // Add hit-test rects for this renderer only to the provided list. layerOffset is the offset 1075 // of this renderer within the current layer that should be used for each result. 1076 virtual void computeSelfHitTestRects(Vector<LayoutRect>&, const LayoutPoint& layerOffset) const { }; 1077 1078 private: 1079 RenderBlock* containerForFixedPosition(const RenderLayerModelObject* paintInvalidationContainer = 0, bool* paintInvalidationContainerSkipped = 0) const; 1080 1081 RenderFlowThread* locateFlowThreadContainingBlock() const; 1082 void removeFromRenderFlowThread(); 1083 void removeFromRenderFlowThreadRecursive(RenderFlowThread*); 1084 1085 bool hasImmediateNonWhitespaceTextChildOrPropertiesDependentOnColor() const; 1086 1087 RenderStyle* cachedFirstLineStyle() const; 1088 StyleDifference adjustStyleDifference(StyleDifference, unsigned contextSensitiveProperties) const; 1089 1090 Color selectionColor(int colorProperty) const; 1091 1092 void removeShapeImageClient(ShapeValue*); 1093 1094 #ifndef NDEBUG 1095 void checkBlockPositionedObjectsNeedLayout(); 1096 #endif 1097 const char* invalidationReasonToString(InvalidationReason) const; 1098 1099 static bool isAllowedToModifyRenderTreeStructure(Document&); 1100 1101 RefPtr<RenderStyle> m_style; 1102 1103 Node* m_node; 1104 1105 RenderObject* m_parent; 1106 RenderObject* m_previous; 1107 RenderObject* m_next; 1108 1109 #ifndef NDEBUG 1110 unsigned m_hasAXObject : 1; 1111 unsigned m_setNeedsLayoutForbidden : 1; 1112 #endif 1113 1114 #define ADD_BOOLEAN_BITFIELD(name, Name) \ 1115 private:\ 1116 unsigned m_##name : 1;\ 1117 public:\ 1118 bool name() const { return m_##name; }\ 1119 void set##Name(bool name) { m_##name = name; }\ 1120 1121 class RenderObjectBitfields { 1122 enum PositionedState { 1123 IsStaticallyPositioned = 0, 1124 IsRelativelyPositioned = 1, 1125 IsOutOfFlowPositioned = 2, 1126 IsStickyPositioned = 3 1127 }; 1128 1129 public: 1130 RenderObjectBitfields(Node* node) 1131 : m_selfNeedsLayout(false) 1132 // FIXME: shouldDoFullPaintInvalidationAfterLayout is needed because we reset 1133 // the layout bits beforeissing paint invalidations when doing invalidateTreeAfterLayout. 1134 // Holding the layout bits until after paint invalidation would remove the need 1135 // for this flag. 1136 , m_shouldDoFullPaintInvalidationAfterLayout(false) 1137 , m_shouldInvalidateOverflowForPaint(false) 1138 , m_shouldDoFullPaintInvalidationIfSelfPaintingLayer(false) 1139 // FIXME: We should remove mayNeedPaintInvalidation once we are able to 1140 // use the other layout flags to detect the same cases. crbug.com/370118 1141 , m_mayNeedPaintInvalidation(false) 1142 , m_onlyNeededPositionedMovementLayout(false) 1143 , m_needsPositionedMovementLayout(false) 1144 , m_normalChildNeedsLayout(false) 1145 , m_posChildNeedsLayout(false) 1146 , m_needsSimplifiedNormalFlowLayout(false) 1147 , m_preferredLogicalWidthsDirty(false) 1148 , m_floating(false) 1149 , m_selfNeedsOverflowRecalcAfterStyleChange(false) 1150 , m_childNeedsOverflowRecalcAfterStyleChange(false) 1151 , m_isAnonymous(!node) 1152 , m_isText(false) 1153 , m_isBox(false) 1154 , m_isInline(true) 1155 , m_isReplaced(false) 1156 , m_horizontalWritingMode(true) 1157 , m_isDragging(false) 1158 , m_hasLayer(false) 1159 , m_hasOverflowClip(false) 1160 , m_hasTransform(false) 1161 , m_hasReflection(false) 1162 , m_hasCounterNodeMap(false) 1163 , m_everHadLayout(false) 1164 , m_ancestorLineBoxDirty(false) 1165 , m_childrenInline(false) 1166 , m_hasColumns(false) 1167 , m_layoutDidGetCalled(false) 1168 , m_positionedState(IsStaticallyPositioned) 1169 , m_selectionState(SelectionNone) 1170 , m_flowThreadState(NotInsideFlowThread) 1171 , m_boxDecorationState(NoBoxDecorations) 1172 , m_hasPendingResourceUpdate(false) 1173 { 1174 } 1175 1176 // 32 bits have been used in the first word, and 6 in the second. 1177 ADD_BOOLEAN_BITFIELD(selfNeedsLayout, SelfNeedsLayout); 1178 ADD_BOOLEAN_BITFIELD(shouldDoFullPaintInvalidationAfterLayout, ShouldDoFullPaintInvalidationAfterLayout); 1179 ADD_BOOLEAN_BITFIELD(shouldInvalidateOverflowForPaint, ShouldInvalidateOverflowForPaint); 1180 ADD_BOOLEAN_BITFIELD(shouldDoFullPaintInvalidationIfSelfPaintingLayer, ShouldDoFullPaintInvalidationIfSelfPaintingLayer); 1181 ADD_BOOLEAN_BITFIELD(mayNeedPaintInvalidation, MayNeedPaintInvalidation); 1182 ADD_BOOLEAN_BITFIELD(onlyNeededPositionedMovementLayout, OnlyNeededPositionedMovementLayout); 1183 ADD_BOOLEAN_BITFIELD(needsPositionedMovementLayout, NeedsPositionedMovementLayout); 1184 ADD_BOOLEAN_BITFIELD(normalChildNeedsLayout, NormalChildNeedsLayout); 1185 ADD_BOOLEAN_BITFIELD(posChildNeedsLayout, PosChildNeedsLayout); 1186 ADD_BOOLEAN_BITFIELD(needsSimplifiedNormalFlowLayout, NeedsSimplifiedNormalFlowLayout); 1187 ADD_BOOLEAN_BITFIELD(preferredLogicalWidthsDirty, PreferredLogicalWidthsDirty); 1188 ADD_BOOLEAN_BITFIELD(floating, Floating); 1189 ADD_BOOLEAN_BITFIELD(selfNeedsOverflowRecalcAfterStyleChange, SelfNeedsOverflowRecalcAfterStyleChange); 1190 ADD_BOOLEAN_BITFIELD(childNeedsOverflowRecalcAfterStyleChange, ChildNeedsOverflowRecalcAfterStyleChange); 1191 1192 ADD_BOOLEAN_BITFIELD(isAnonymous, IsAnonymous); 1193 ADD_BOOLEAN_BITFIELD(isText, IsText); 1194 ADD_BOOLEAN_BITFIELD(isBox, IsBox); 1195 ADD_BOOLEAN_BITFIELD(isInline, IsInline); 1196 ADD_BOOLEAN_BITFIELD(isReplaced, IsReplaced); 1197 ADD_BOOLEAN_BITFIELD(horizontalWritingMode, HorizontalWritingMode); 1198 ADD_BOOLEAN_BITFIELD(isDragging, IsDragging); 1199 1200 ADD_BOOLEAN_BITFIELD(hasLayer, HasLayer); 1201 ADD_BOOLEAN_BITFIELD(hasOverflowClip, HasOverflowClip); // Set in the case of overflow:auto/scroll/hidden 1202 ADD_BOOLEAN_BITFIELD(hasTransform, HasTransform); 1203 ADD_BOOLEAN_BITFIELD(hasReflection, HasReflection); 1204 1205 ADD_BOOLEAN_BITFIELD(hasCounterNodeMap, HasCounterNodeMap); 1206 ADD_BOOLEAN_BITFIELD(everHadLayout, EverHadLayout); 1207 ADD_BOOLEAN_BITFIELD(ancestorLineBoxDirty, AncestorLineBoxDirty); 1208 1209 // from RenderBlock 1210 ADD_BOOLEAN_BITFIELD(childrenInline, ChildrenInline); 1211 ADD_BOOLEAN_BITFIELD(hasColumns, HasColumns); 1212 1213 ADD_BOOLEAN_BITFIELD(layoutDidGetCalled, LayoutDidGetCalled); 1214 1215 private: 1216 unsigned m_positionedState : 2; // PositionedState 1217 unsigned m_selectionState : 3; // SelectionState 1218 unsigned m_flowThreadState : 2; // FlowThreadState 1219 unsigned m_boxDecorationState : 2; // BoxDecorationState 1220 1221 public: 1222 1223 ADD_BOOLEAN_BITFIELD(hasPendingResourceUpdate, HasPendingResourceUpdate); 1224 1225 bool isOutOfFlowPositioned() const { return m_positionedState == IsOutOfFlowPositioned; } 1226 bool isRelPositioned() const { return m_positionedState == IsRelativelyPositioned; } 1227 bool isStickyPositioned() const { return m_positionedState == IsStickyPositioned; } 1228 bool isPositioned() const { return m_positionedState != IsStaticallyPositioned; } 1229 1230 void setPositionedState(int positionState) 1231 { 1232 // This mask maps FixedPosition and AbsolutePosition to IsOutOfFlowPositioned, saving one bit. 1233 m_positionedState = static_cast<PositionedState>(positionState & 0x3); 1234 } 1235 void clearPositionedState() { m_positionedState = StaticPosition; } 1236 1237 ALWAYS_INLINE SelectionState selectionState() const { return static_cast<SelectionState>(m_selectionState); } 1238 ALWAYS_INLINE void setSelectionState(SelectionState selectionState) { m_selectionState = selectionState; } 1239 1240 ALWAYS_INLINE FlowThreadState flowThreadState() const { return static_cast<FlowThreadState>(m_flowThreadState); } 1241 ALWAYS_INLINE void setFlowThreadState(FlowThreadState flowThreadState) { m_flowThreadState = flowThreadState; } 1242 1243 ALWAYS_INLINE BoxDecorationState boxDecorationState() const { return static_cast<BoxDecorationState>(m_boxDecorationState); } 1244 ALWAYS_INLINE void setBoxDecorationState(BoxDecorationState boxDecorationState) { m_boxDecorationState = boxDecorationState; } 1245 }; 1246 1247 #undef ADD_BOOLEAN_BITFIELD 1248 1249 RenderObjectBitfields m_bitfields; 1250 1251 void setSelfNeedsLayout(bool b) { m_bitfields.setSelfNeedsLayout(b); } 1252 void setNeedsPositionedMovementLayout(bool b) { m_bitfields.setNeedsPositionedMovementLayout(b); } 1253 void setNormalChildNeedsLayout(bool b) { m_bitfields.setNormalChildNeedsLayout(b); } 1254 void setPosChildNeedsLayout(bool b) { m_bitfields.setPosChildNeedsLayout(b); } 1255 void setNeedsSimplifiedNormalFlowLayout(bool b) { m_bitfields.setNeedsSimplifiedNormalFlowLayout(b); } 1256 void setIsDragging(bool b) { m_bitfields.setIsDragging(b); } 1257 void setEverHadLayout(bool b) { m_bitfields.setEverHadLayout(b); } 1258 void setShouldInvalidateOverflowForPaint(bool b) { m_bitfields.setShouldInvalidateOverflowForPaint(b); } 1259 void setSelfNeedsOverflowRecalcAfterStyleChange(bool b) { m_bitfields.setSelfNeedsOverflowRecalcAfterStyleChange(b); } 1260 void setChildNeedsOverflowRecalcAfterStyleChange(bool b) { m_bitfields.setChildNeedsOverflowRecalcAfterStyleChange(b); } 1261 1262 private: 1263 // Store state between styleWillChange and styleDidChange 1264 static bool s_affectsParentBlock; 1265 1266 // This stores the paint invalidation rect from the previous layout. 1267 LayoutRect m_previousPaintInvalidationRect; 1268 1269 // This stores the position in the paint invalidation container's coordinate. 1270 // It is used to detect renderer shifts that forces a full invalidation. 1271 LayoutPoint m_previousPositionFromPaintInvalidationContainer; 1272 }; 1273 1274 // FIXME: remove this once the render object lifecycle ASSERTS are no longer hit. 1275 class DeprecatedDisableModifyRenderTreeStructureAsserts { 1276 WTF_MAKE_NONCOPYABLE(DeprecatedDisableModifyRenderTreeStructureAsserts); 1277 public: 1278 DeprecatedDisableModifyRenderTreeStructureAsserts(); 1279 1280 static bool canModifyRenderTreeStateInAnyState(); 1281 1282 private: 1283 TemporaryChange<bool> m_disabler; 1284 }; 1285 1286 // Allow equality comparisons of RenderObjects by reference or pointer, interchangeably. 1287 DEFINE_COMPARISON_OPERATORS_WITH_REFERENCES(RenderObject) 1288 1289 inline bool RenderObject::documentBeingDestroyed() const 1290 { 1291 return document().lifecycle().state() >= DocumentLifecycle::Stopping; 1292 } 1293 1294 inline bool RenderObject::isBeforeContent() const 1295 { 1296 if (style()->styleType() != BEFORE) 1297 return false; 1298 // Text nodes don't have their own styles, so ignore the style on a text node. 1299 if (isText() && !isBR()) 1300 return false; 1301 return true; 1302 } 1303 1304 inline bool RenderObject::isAfterContent() const 1305 { 1306 if (style()->styleType() != AFTER) 1307 return false; 1308 // Text nodes don't have their own styles, so ignore the style on a text node. 1309 if (isText() && !isBR()) 1310 return false; 1311 return true; 1312 } 1313 1314 inline bool RenderObject::isBeforeOrAfterContent() const 1315 { 1316 return isBeforeContent() || isAfterContent(); 1317 } 1318 1319 // If repaintAfterLayout is enabled, setNeedsLayout() won't cause full paint invalidations as 1320 // setNeedsLayoutAndFullPaintInvalidation() does. Otherwise the two methods are identical. 1321 inline void RenderObject::setNeedsLayout(MarkingBehavior markParents, SubtreeLayoutScope* layouter) 1322 { 1323 ASSERT(!isSetNeedsLayoutForbidden()); 1324 bool alreadyNeededLayout = m_bitfields.selfNeedsLayout(); 1325 setSelfNeedsLayout(true); 1326 if (!alreadyNeededLayout) { 1327 if (markParents == MarkContainingBlockChain && (!layouter || layouter->root() != this)) 1328 markContainingBlocksForLayout(true, 0, layouter); 1329 } 1330 } 1331 1332 inline void RenderObject::setNeedsLayoutAndFullPaintInvalidation(MarkingBehavior markParents, SubtreeLayoutScope* layouter) 1333 { 1334 setNeedsLayout(markParents, layouter); 1335 setShouldDoFullPaintInvalidationAfterLayout(true); 1336 } 1337 1338 inline void RenderObject::clearNeedsLayout() 1339 { 1340 if (needsPositionedMovementLayoutOnly()) 1341 setOnlyNeededPositionedMovementLayout(true); 1342 setLayoutDidGetCalled(true); 1343 setSelfNeedsLayout(false); 1344 setEverHadLayout(true); 1345 setPosChildNeedsLayout(false); 1346 setNeedsSimplifiedNormalFlowLayout(false); 1347 setNormalChildNeedsLayout(false); 1348 setNeedsPositionedMovementLayout(false); 1349 setAncestorLineBoxDirty(false); 1350 #ifndef NDEBUG 1351 checkBlockPositionedObjectsNeedLayout(); 1352 #endif 1353 } 1354 1355 inline void RenderObject::setChildNeedsLayout(MarkingBehavior markParents, SubtreeLayoutScope* layouter) 1356 { 1357 ASSERT(!isSetNeedsLayoutForbidden()); 1358 bool alreadyNeededLayout = normalChildNeedsLayout(); 1359 setNormalChildNeedsLayout(true); 1360 // FIXME: Replace MarkOnlyThis with the SubtreeLayoutScope code path and remove the MarkingBehavior argument entirely. 1361 if (!alreadyNeededLayout && markParents == MarkContainingBlockChain && (!layouter || layouter->root() != this)) 1362 markContainingBlocksForLayout(true, 0, layouter); 1363 } 1364 1365 inline void RenderObject::setNeedsPositionedMovementLayout() 1366 { 1367 bool alreadyNeededLayout = needsPositionedMovementLayout(); 1368 setNeedsPositionedMovementLayout(true); 1369 ASSERT(!isSetNeedsLayoutForbidden()); 1370 if (!alreadyNeededLayout) { 1371 markContainingBlocksForLayout(); 1372 if (hasLayer()) 1373 setLayerNeedsFullPaintInvalidationForPositionedMovementLayout(); 1374 } 1375 } 1376 1377 inline bool RenderObject::preservesNewline() const 1378 { 1379 if (isSVGInlineText()) 1380 return false; 1381 1382 return style()->preserveNewline(); 1383 } 1384 1385 inline bool RenderObject::layerCreationAllowedForSubtree() const 1386 { 1387 RenderObject* parentRenderer = parent(); 1388 while (parentRenderer) { 1389 if (parentRenderer->isSVGHiddenContainer()) 1390 return false; 1391 parentRenderer = parentRenderer->parent(); 1392 } 1393 1394 return true; 1395 } 1396 1397 inline void RenderObject::setSelectionStateIfNeeded(SelectionState state) 1398 { 1399 if (selectionState() == state) 1400 return; 1401 1402 setSelectionState(state); 1403 } 1404 1405 inline void RenderObject::setHasBoxDecorations(bool b) 1406 { 1407 if (!b) { 1408 m_bitfields.setBoxDecorationState(NoBoxDecorations); 1409 return; 1410 } 1411 if (hasBoxDecorations()) 1412 return; 1413 m_bitfields.setBoxDecorationState(HasBoxDecorationsAndBackgroundObscurationStatusInvalid); 1414 } 1415 1416 inline void RenderObject::invalidateBackgroundObscurationStatus() 1417 { 1418 if (!hasBoxDecorations()) 1419 return; 1420 m_bitfields.setBoxDecorationState(HasBoxDecorationsAndBackgroundObscurationStatusInvalid); 1421 } 1422 1423 inline bool RenderObject::backgroundIsKnownToBeObscured() 1424 { 1425 if (m_bitfields.boxDecorationState() == HasBoxDecorationsAndBackgroundObscurationStatusInvalid) { 1426 BoxDecorationState boxDecorationState = computeBackgroundIsKnownToBeObscured() ? HasBoxDecorationsAndBackgroundIsKnownToBeObscured : HasBoxDecorationsAndBackgroundMayBeVisible; 1427 m_bitfields.setBoxDecorationState(boxDecorationState); 1428 } 1429 return m_bitfields.boxDecorationState() == HasBoxDecorationsAndBackgroundIsKnownToBeObscured; 1430 } 1431 1432 inline void makeMatrixRenderable(TransformationMatrix& matrix, bool has3DRendering) 1433 { 1434 if (!has3DRendering) 1435 matrix.makeAffine(); 1436 } 1437 1438 inline int adjustForAbsoluteZoom(int value, RenderObject* renderer) 1439 { 1440 return adjustForAbsoluteZoom(value, renderer->style()); 1441 } 1442 1443 inline double adjustDoubleForAbsoluteZoom(double value, RenderObject& renderer) 1444 { 1445 ASSERT(renderer.style()); 1446 return adjustDoubleForAbsoluteZoom(value, *renderer.style()); 1447 } 1448 1449 inline LayoutUnit adjustLayoutUnitForAbsoluteZoom(LayoutUnit value, RenderObject& renderer) 1450 { 1451 ASSERT(renderer.style()); 1452 return adjustLayoutUnitForAbsoluteZoom(value, *renderer.style()); 1453 } 1454 1455 inline void adjustFloatQuadForAbsoluteZoom(FloatQuad& quad, RenderObject& renderer) 1456 { 1457 float zoom = renderer.style()->effectiveZoom(); 1458 if (zoom != 1) 1459 quad.scale(1 / zoom, 1 / zoom); 1460 } 1461 1462 inline void adjustFloatRectForAbsoluteZoom(FloatRect& rect, RenderObject& renderer) 1463 { 1464 float zoom = renderer.style()->effectiveZoom(); 1465 if (zoom != 1) 1466 rect.scale(1 / zoom, 1 / zoom); 1467 } 1468 1469 #define DEFINE_RENDER_OBJECT_TYPE_CASTS(thisType, predicate) \ 1470 DEFINE_TYPE_CASTS(thisType, RenderObject, object, object->predicate, object.predicate) 1471 1472 } // namespace WebCore 1473 1474 #ifndef NDEBUG 1475 // Outside the WebCore namespace for ease of invocation from gdb. 1476 void showTree(const WebCore::RenderObject*); 1477 void showLineTree(const WebCore::RenderObject*); 1478 void showRenderTree(const WebCore::RenderObject* object1); 1479 // We don't make object2 an optional parameter so that showRenderTree 1480 // can be called from gdb easily. 1481 void showRenderTree(const WebCore::RenderObject* object1, const WebCore::RenderObject* object2); 1482 1483 #endif 1484 1485 #endif // RenderObject_h 1486
