1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * (C) 1999 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) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. 7 * Copyright (C) 2009 Google Inc. All rights reserved. 8 * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 9 * 10 * This library is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU Library General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This library is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * Library General Public License for more details. 19 * 20 * You should have received a copy of the GNU Library General Public License 21 * along with this library; see the file COPYING.LIB. If not, write to 22 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 23 * Boston, MA 02110-1301, USA. 24 * 25 */ 26 27 #include "config.h" 28 #include "RenderObject.h" 29 30 #include "AXObjectCache.h" 31 #include "Chrome.h" 32 #include "CSSStyleSelector.h" 33 #include "FloatQuad.h" 34 #include "Frame.h" 35 #include "FrameView.h" 36 #include "GraphicsContext.h" 37 #include "HTMLNames.h" 38 #include "HitTestResult.h" 39 #include "Page.h" 40 #include "RenderArena.h" 41 #include "RenderCounter.h" 42 #include "RenderFlexibleBox.h" 43 #include "RenderImageGeneratedContent.h" 44 #include "RenderInline.h" 45 #include "RenderListItem.h" 46 #include "RenderRuby.h" 47 #include "RenderRubyText.h" 48 #include "RenderTableCell.h" 49 #include "RenderTableCol.h" 50 #include "RenderTableRow.h" 51 #include "RenderTheme.h" 52 #include "RenderView.h" 53 #include "TransformState.h" 54 #include "htmlediting.h" 55 #include <algorithm> 56 #ifdef ANDROID_LAYOUT 57 #include "Settings.h" 58 #endif 59 #include <stdio.h> 60 #include <wtf/RefCountedLeakCounter.h> 61 #include <wtf/UnusedParam.h> 62 63 #if USE(ACCELERATED_COMPOSITING) 64 #include "RenderLayerCompositor.h" 65 #endif 66 67 #if ENABLE(WML) 68 #include "WMLNames.h" 69 #endif 70 71 #if ENABLE(SVG) 72 #include "SVGRenderSupport.h" 73 #endif 74 75 using namespace std; 76 77 namespace WebCore { 78 79 using namespace HTMLNames; 80 81 #ifndef NDEBUG 82 static void* baseOfRenderObjectBeingDeleted; 83 #endif 84 85 bool RenderObject::s_affectsParentBlock = false; 86 87 void* RenderObject::operator new(size_t sz, RenderArena* renderArena) throw() 88 { 89 return renderArena->allocate(sz); 90 } 91 92 void RenderObject::operator delete(void* ptr, size_t sz) 93 { 94 ASSERT(baseOfRenderObjectBeingDeleted == ptr); 95 96 // Stash size where destroy can find it. 97 *(size_t *)ptr = sz; 98 } 99 100 RenderObject* RenderObject::createObject(Node* node, RenderStyle* style) 101 { 102 Document* doc = node->document(); 103 RenderArena* arena = doc->renderArena(); 104 105 // Minimal support for content properties replacing an entire element. 106 // Works only if we have exactly one piece of content and it's a URL. 107 // Otherwise acts as if we didn't support this feature. 108 const ContentData* contentData = style->contentData(); 109 if (contentData && !contentData->next() && contentData->isImage() && doc != node) { 110 RenderImageGeneratedContent* image = new (arena) RenderImageGeneratedContent(node); 111 image->setStyle(style); 112 if (StyleImage* styleImage = contentData->image()) 113 image->setStyleImage(styleImage); 114 return image; 115 } 116 117 #if ENABLE(RUBY) 118 if (node->hasTagName(rubyTag)) { 119 if (style->display() == INLINE) 120 return new (arena) RenderRubyAsInline(node); 121 else 122 return new (arena) RenderRubyAsBlock(node); 123 } 124 // treat <rt> as ruby text ONLY if it still has its default treatment of block 125 if (node->hasTagName(rtTag) && style->display() == BLOCK) 126 return new (arena) RenderRubyText(node); 127 #endif 128 129 switch (style->display()) { 130 case NONE: 131 return 0; 132 case INLINE: 133 return new (arena) RenderInline(node); 134 case BLOCK: 135 case INLINE_BLOCK: 136 case RUN_IN: 137 case COMPACT: 138 return new (arena) RenderBlock(node); 139 case LIST_ITEM: 140 return new (arena) RenderListItem(node); 141 case TABLE: 142 case INLINE_TABLE: 143 return new (arena) RenderTable(node); 144 case TABLE_ROW_GROUP: 145 case TABLE_HEADER_GROUP: 146 case TABLE_FOOTER_GROUP: 147 return new (arena) RenderTableSection(node); 148 case TABLE_ROW: 149 return new (arena) RenderTableRow(node); 150 case TABLE_COLUMN_GROUP: 151 case TABLE_COLUMN: 152 return new (arena) RenderTableCol(node); 153 case TABLE_CELL: 154 return new (arena) RenderTableCell(node); 155 case TABLE_CAPTION: 156 #if ENABLE(WCSS) 157 // As per the section 17.1 of the spec WAP-239-WCSS-20011026-a.pdf, 158 // the marquee box inherits and extends the characteristics of the 159 // principal block box ([CSS2] section 9.2.1). 160 case WAP_MARQUEE: 161 #endif 162 return new (arena) RenderBlock(node); 163 case BOX: 164 case INLINE_BOX: 165 return new (arena) RenderFlexibleBox(node); 166 } 167 168 return 0; 169 } 170 171 #ifndef NDEBUG 172 static WTF::RefCountedLeakCounter renderObjectCounter("RenderObject"); 173 #endif 174 175 RenderObject::RenderObject(Node* node) 176 : CachedResourceClient() 177 , m_style(0) 178 , m_node(node) 179 , m_parent(0) 180 , m_previous(0) 181 , m_next(0) 182 #ifndef NDEBUG 183 , m_hasAXObject(false) 184 , m_setNeedsLayoutForbidden(false) 185 #endif 186 , m_needsLayout(false) 187 , m_needsPositionedMovementLayout(false) 188 , m_normalChildNeedsLayout(false) 189 , m_posChildNeedsLayout(false) 190 , m_prefWidthsDirty(false) 191 , m_floating(false) 192 , m_positioned(false) 193 , m_relPositioned(false) 194 , m_paintBackground(false) 195 , m_isAnonymous(node == node->document()) 196 , m_isText(false) 197 , m_isBox(false) 198 , m_inline(true) 199 , m_replaced(false) 200 , m_isDragging(false) 201 , m_hasLayer(false) 202 , m_hasOverflowClip(false) 203 , m_hasTransform(false) 204 , m_hasReflection(false) 205 , m_hasOverrideSize(false) 206 , m_hasCounterNodeMap(false) 207 , m_everHadLayout(false) 208 , m_childrenInline(false) 209 , m_topMarginQuirk(false) 210 , m_bottomMarginQuirk(false) 211 , m_hasMarkupTruncation(false) 212 , m_selectionState(SelectionNone) 213 , m_hasColumns(false) 214 , m_cellWidthChanged(false) 215 { 216 #ifndef NDEBUG 217 renderObjectCounter.increment(); 218 #endif 219 ASSERT(node); 220 } 221 222 RenderObject::~RenderObject() 223 { 224 ASSERT(!node() || documentBeingDestroyed() || !document()->frame()->view() || document()->frame()->view()->layoutRoot() != this); 225 #ifndef NDEBUG 226 ASSERT(!m_hasAXObject); 227 renderObjectCounter.decrement(); 228 #endif 229 } 230 231 RenderTheme* RenderObject::theme() const 232 { 233 ASSERT(document()->page()); 234 235 return document()->page()->theme(); 236 } 237 238 bool RenderObject::isDescendantOf(const RenderObject* obj) const 239 { 240 for (const RenderObject* r = this; r; r = r->m_parent) { 241 if (r == obj) 242 return true; 243 } 244 return false; 245 } 246 247 bool RenderObject::isBody() const 248 { 249 return node() && node()->hasTagName(bodyTag); 250 } 251 252 bool RenderObject::isHR() const 253 { 254 return node() && node()->hasTagName(hrTag); 255 } 256 257 bool RenderObject::isHTMLMarquee() const 258 { 259 return node() && node()->renderer() == this && node()->hasTagName(marqueeTag); 260 } 261 262 static void updateListMarkerNumbers(RenderObject* child) 263 { 264 for (RenderObject* sibling = child; sibling; sibling = sibling->nextSibling()) { 265 if (sibling->isListItem()) 266 toRenderListItem(sibling)->updateValue(); 267 } 268 } 269 270 void RenderObject::addChild(RenderObject* newChild, RenderObject* beforeChild) 271 { 272 RenderObjectChildList* children = virtualChildren(); 273 ASSERT(children); 274 if (!children) 275 return; 276 277 bool needsTable = false; 278 279 if (newChild->isListItem()) 280 updateListMarkerNumbers(beforeChild ? beforeChild : children->lastChild()); 281 else if (newChild->isTableCol() && newChild->style()->display() == TABLE_COLUMN_GROUP) 282 needsTable = !isTable(); 283 else if (newChild->isRenderBlock() && newChild->style()->display() == TABLE_CAPTION) 284 needsTable = !isTable(); 285 else if (newChild->isTableSection()) 286 needsTable = !isTable(); 287 else if (newChild->isTableRow()) 288 needsTable = !isTableSection(); 289 else if (newChild->isTableCell()) { 290 needsTable = !isTableRow(); 291 // I'm not 100% sure this is the best way to fix this, but without this 292 // change we recurse infinitely when trying to render the CSS2 test page: 293 // http://www.bath.ac.uk/%7Epy8ieh/internet/eviltests/htmlbodyheadrendering2.html. 294 // See Radar 2925291. 295 if (needsTable && isTableCell() && !children->firstChild() && !newChild->isTableCell()) 296 needsTable = false; 297 } 298 299 if (needsTable) { 300 RenderTable* table; 301 RenderObject* afterChild = beforeChild ? beforeChild->previousSibling() : children->lastChild(); 302 if (afterChild && afterChild->isAnonymous() && afterChild->isTable()) 303 table = toRenderTable(afterChild); 304 else { 305 table = new (renderArena()) RenderTable(document() /* is anonymous */); 306 RefPtr<RenderStyle> newStyle = RenderStyle::create(); 307 newStyle->inheritFrom(style()); 308 newStyle->setDisplay(TABLE); 309 table->setStyle(newStyle.release()); 310 addChild(table, beforeChild); 311 } 312 table->addChild(newChild); 313 } else { 314 // Just add it... 315 children->insertChildNode(this, newChild, beforeChild); 316 } 317 RenderCounter::rendererSubtreeAttached(newChild); 318 if (newChild->isText() && newChild->style()->textTransform() == CAPITALIZE) { 319 RefPtr<StringImpl> textToTransform = toRenderText(newChild)->originalText(); 320 if (textToTransform) 321 toRenderText(newChild)->setText(textToTransform.release(), true); 322 } 323 } 324 325 void RenderObject::removeChild(RenderObject* oldChild) 326 { 327 RenderObjectChildList* children = virtualChildren(); 328 ASSERT(children); 329 if (!children) 330 return; 331 332 // We do this here instead of in removeChildNode, since the only extremely low-level uses of remove/appendChildNode 333 // cannot affect the positioned object list, and the floating object list is irrelevant (since the list gets cleared on 334 // layout anyway). 335 if (oldChild->isFloatingOrPositioned()) 336 toRenderBox(oldChild)->removeFloatingOrPositionedChildFromBlockLists(); 337 338 children->removeChildNode(this, oldChild); 339 } 340 341 RenderObject* RenderObject::nextInPreOrder() const 342 { 343 if (RenderObject* o = firstChild()) 344 return o; 345 346 return nextInPreOrderAfterChildren(); 347 } 348 349 RenderObject* RenderObject::nextInPreOrderAfterChildren() const 350 { 351 RenderObject* o; 352 if (!(o = nextSibling())) { 353 o = parent(); 354 while (o && !o->nextSibling()) 355 o = o->parent(); 356 if (o) 357 o = o->nextSibling(); 358 } 359 360 return o; 361 } 362 363 RenderObject* RenderObject::nextInPreOrder(RenderObject* stayWithin) const 364 { 365 if (RenderObject* o = firstChild()) 366 return o; 367 368 return nextInPreOrderAfterChildren(stayWithin); 369 } 370 371 RenderObject* RenderObject::nextInPreOrderAfterChildren(RenderObject* stayWithin) const 372 { 373 if (this == stayWithin) 374 return 0; 375 376 const RenderObject* current = this; 377 RenderObject* next; 378 while (!(next = current->nextSibling())) { 379 current = current->parent(); 380 if (!current || current == stayWithin) 381 return 0; 382 } 383 return next; 384 } 385 386 RenderObject* RenderObject::previousInPreOrder() const 387 { 388 if (RenderObject* o = previousSibling()) { 389 while (o->lastChild()) 390 o = o->lastChild(); 391 return o; 392 } 393 394 return parent(); 395 } 396 397 RenderObject* RenderObject::childAt(unsigned index) const 398 { 399 RenderObject* child = firstChild(); 400 for (unsigned i = 0; child && i < index; i++) 401 child = child->nextSibling(); 402 return child; 403 } 404 405 RenderObject* RenderObject::firstLeafChild() const 406 { 407 RenderObject* r = firstChild(); 408 while (r) { 409 RenderObject* n = 0; 410 n = r->firstChild(); 411 if (!n) 412 break; 413 r = n; 414 } 415 return r; 416 } 417 418 RenderObject* RenderObject::lastLeafChild() const 419 { 420 RenderObject* r = lastChild(); 421 while (r) { 422 RenderObject* n = 0; 423 n = r->lastChild(); 424 if (!n) 425 break; 426 r = n; 427 } 428 return r; 429 } 430 431 static void addLayers(RenderObject* obj, RenderLayer* parentLayer, RenderObject*& newObject, 432 RenderLayer*& beforeChild) 433 { 434 if (obj->hasLayer()) { 435 if (!beforeChild && newObject) { 436 // We need to figure out the layer that follows newObject. We only do 437 // this the first time we find a child layer, and then we update the 438 // pointer values for newObject and beforeChild used by everyone else. 439 beforeChild = newObject->parent()->findNextLayer(parentLayer, newObject); 440 newObject = 0; 441 } 442 parentLayer->addChild(toRenderBoxModelObject(obj)->layer(), beforeChild); 443 return; 444 } 445 446 for (RenderObject* curr = obj->firstChild(); curr; curr = curr->nextSibling()) 447 addLayers(curr, parentLayer, newObject, beforeChild); 448 } 449 450 void RenderObject::addLayers(RenderLayer* parentLayer, RenderObject* newObject) 451 { 452 if (!parentLayer) 453 return; 454 455 RenderObject* object = newObject; 456 RenderLayer* beforeChild = 0; 457 WebCore::addLayers(this, parentLayer, object, beforeChild); 458 } 459 460 void RenderObject::removeLayers(RenderLayer* parentLayer) 461 { 462 if (!parentLayer) 463 return; 464 465 if (hasLayer()) { 466 parentLayer->removeChild(toRenderBoxModelObject(this)->layer()); 467 return; 468 } 469 470 for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling()) 471 curr->removeLayers(parentLayer); 472 } 473 474 void RenderObject::moveLayers(RenderLayer* oldParent, RenderLayer* newParent) 475 { 476 if (!newParent) 477 return; 478 479 if (hasLayer()) { 480 RenderLayer* layer = toRenderBoxModelObject(this)->layer(); 481 ASSERT(oldParent == layer->parent()); 482 if (oldParent) 483 oldParent->removeChild(layer); 484 newParent->addChild(layer); 485 return; 486 } 487 488 for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling()) 489 curr->moveLayers(oldParent, newParent); 490 } 491 492 RenderLayer* RenderObject::findNextLayer(RenderLayer* parentLayer, RenderObject* startPoint, 493 bool checkParent) 494 { 495 // Error check the parent layer passed in. If it's null, we can't find anything. 496 if (!parentLayer) 497 return 0; 498 499 // Step 1: If our layer is a child of the desired parent, then return our layer. 500 RenderLayer* ourLayer = hasLayer() ? toRenderBoxModelObject(this)->layer() : 0; 501 if (ourLayer && ourLayer->parent() == parentLayer) 502 return ourLayer; 503 504 // Step 2: If we don't have a layer, or our layer is the desired parent, then descend 505 // into our siblings trying to find the next layer whose parent is the desired parent. 506 if (!ourLayer || ourLayer == parentLayer) { 507 for (RenderObject* curr = startPoint ? startPoint->nextSibling() : firstChild(); 508 curr; curr = curr->nextSibling()) { 509 RenderLayer* nextLayer = curr->findNextLayer(parentLayer, 0, false); 510 if (nextLayer) 511 return nextLayer; 512 } 513 } 514 515 // Step 3: If our layer is the desired parent layer, then we're finished. We didn't 516 // find anything. 517 if (parentLayer == ourLayer) 518 return 0; 519 520 // Step 4: If |checkParent| is set, climb up to our parent and check its siblings that 521 // follow us to see if we can locate a layer. 522 if (checkParent && parent()) 523 return parent()->findNextLayer(parentLayer, this, true); 524 525 return 0; 526 } 527 528 RenderLayer* RenderObject::enclosingLayer() const 529 { 530 const RenderObject* curr = this; 531 while (curr) { 532 RenderLayer* layer = curr->hasLayer() ? toRenderBoxModelObject(curr)->layer() : 0; 533 if (layer) 534 return layer; 535 curr = curr->parent(); 536 } 537 return 0; 538 } 539 540 RenderLayer* RenderObject::enclosingSelfPaintingLayer() const 541 { 542 const RenderObject* curr = this; 543 while (curr) { 544 RenderLayer* layer = curr->hasLayer() ? toRenderBoxModelObject(curr)->layer() : 0; 545 if (layer && layer->isSelfPaintingLayer()) 546 return layer; 547 curr = curr->parent(); 548 } 549 return 0; 550 } 551 552 RenderBox* RenderObject::enclosingBox() const 553 { 554 RenderObject* curr = const_cast<RenderObject*>(this); 555 while (curr) { 556 if (curr->isBox()) 557 return toRenderBox(curr); 558 curr = curr->parent(); 559 } 560 561 ASSERT_NOT_REACHED(); 562 return 0; 563 } 564 565 RenderBoxModelObject* RenderObject::enclosingBoxModelObject() const 566 { 567 RenderObject* curr = const_cast<RenderObject*>(this); 568 while (curr) { 569 if (curr->isBoxModelObject()) 570 return toRenderBoxModelObject(curr); 571 curr = curr->parent(); 572 } 573 574 ASSERT_NOT_REACHED(); 575 return 0; 576 } 577 578 RenderBlock* RenderObject::firstLineBlock() const 579 { 580 return 0; 581 } 582 583 void RenderObject::setPrefWidthsDirty(bool b, bool markParents) 584 { 585 bool alreadyDirty = m_prefWidthsDirty; 586 m_prefWidthsDirty = b; 587 if (b && !alreadyDirty && markParents && (isText() || (style()->position() != FixedPosition && style()->position() != AbsolutePosition))) 588 invalidateContainerPrefWidths(); 589 } 590 591 void RenderObject::invalidateContainerPrefWidths() 592 { 593 // In order to avoid pathological behavior when inlines are deeply nested, we do include them 594 // in the chain that we mark dirty (even though they're kind of irrelevant). 595 RenderObject* o = isTableCell() ? containingBlock() : container(); 596 while (o && !o->m_prefWidthsDirty) { 597 // Don't invalidate the outermost object of an unrooted subtree. That object will be 598 // invalidated when the subtree is added to the document. 599 RenderObject* container = o->isTableCell() ? o->containingBlock() : o->container(); 600 if (!container && !o->isRenderView()) 601 break; 602 603 o->m_prefWidthsDirty = true; 604 if (o->style()->position() == FixedPosition || o->style()->position() == AbsolutePosition) 605 // A positioned object has no effect on the min/max width of its containing block ever. 606 // We can optimize this case and not go up any further. 607 break; 608 o = container; 609 } 610 } 611 612 void RenderObject::setLayerNeedsFullRepaint() 613 { 614 ASSERT(hasLayer()); 615 toRenderBoxModelObject(this)->layer()->setNeedsFullRepaint(true); 616 } 617 618 RenderBlock* RenderObject::containingBlock() const 619 { 620 if (isTableCell()) { 621 const RenderTableCell* cell = toRenderTableCell(this); 622 if (parent() && cell->section()) 623 return cell->table(); 624 return 0; 625 } 626 627 if (isRenderView()) 628 return const_cast<RenderView*>(toRenderView(this)); 629 630 RenderObject* o = parent(); 631 if (!isText() && m_style->position() == FixedPosition) { 632 while (o && !o->isRenderView() && !(o->hasTransform() && o->isRenderBlock())) 633 o = o->parent(); 634 } else if (!isText() && m_style->position() == AbsolutePosition) { 635 while (o && (o->style()->position() == StaticPosition || (o->isInline() && !o->isReplaced())) && !o->isRenderView() && !(o->hasTransform() && o->isRenderBlock())) { 636 // For relpositioned inlines, we return the nearest enclosing block. We don't try 637 // to return the inline itself. This allows us to avoid having a positioned objects 638 // list in all RenderInlines and lets us return a strongly-typed RenderBlock* result 639 // from this method. The container() method can actually be used to obtain the 640 // inline directly. 641 if (o->style()->position() == RelativePosition && o->isInline() && !o->isReplaced()) 642 return o->containingBlock(); 643 #if ENABLE(SVG) 644 if (o->isSVGForeignObject()) //foreignObject is the containing block for contents inside it 645 break; 646 #endif 647 648 o = o->parent(); 649 } 650 } else { 651 while (o && ((o->isInline() && !o->isReplaced()) || o->isTableRow() || o->isTableSection() 652 || o->isTableCol() || o->isFrameSet() || o->isMedia() 653 #if ENABLE(SVG) 654 || o->isSVGContainer() || o->isSVGRoot() 655 #endif 656 )) 657 o = o->parent(); 658 } 659 660 if (!o || !o->isRenderBlock()) 661 return 0; // This can still happen in case of an orphaned tree 662 663 return toRenderBlock(o); 664 } 665 666 static bool mustRepaintFillLayers(const RenderObject* renderer, const FillLayer* layer) 667 { 668 // Nobody will use multiple layers without wanting fancy positioning. 669 if (layer->next()) 670 return true; 671 672 // Make sure we have a valid image. 673 StyleImage* img = layer->image(); 674 if (!img || !img->canRender(renderer->style()->effectiveZoom())) 675 return false; 676 677 if (!layer->xPosition().isZero() || !layer->yPosition().isZero()) 678 return true; 679 680 if (layer->size().type == SizeLength) { 681 if (layer->size().size.width().isPercent() || layer->size().size.height().isPercent()) 682 return true; 683 } else if (layer->size().type == Contain || layer->size().type == Cover || img->usesImageContainerSize()) 684 return true; 685 686 return false; 687 } 688 689 bool RenderObject::mustRepaintBackgroundOrBorder() const 690 { 691 if (hasMask() && mustRepaintFillLayers(this, style()->maskLayers())) 692 return true; 693 694 // If we don't have a background/border/mask, then nothing to do. 695 if (!hasBoxDecorations()) 696 return false; 697 698 if (mustRepaintFillLayers(this, style()->backgroundLayers())) 699 return true; 700 701 // Our fill layers are ok. Let's check border. 702 if (style()->hasBorder()) { 703 // Border images are not ok. 704 StyleImage* borderImage = style()->borderImage().image(); 705 bool shouldPaintBorderImage = borderImage && borderImage->canRender(style()->effectiveZoom()); 706 707 // If the image hasn't loaded, we're still using the normal border style. 708 if (shouldPaintBorderImage && borderImage->isLoaded()) 709 return true; 710 } 711 712 return false; 713 } 714 715 void RenderObject::drawLineForBoxSide(GraphicsContext* graphicsContext, int x1, int y1, int x2, int y2, 716 BoxSide s, Color c, const Color& textcolor, EBorderStyle style, 717 int adjbw1, int adjbw2) 718 { 719 int width = (s == BSTop || s == BSBottom ? y2 - y1 : x2 - x1); 720 721 if (style == DOUBLE && width < 3) 722 style = SOLID; 723 724 if (!c.isValid()) { 725 if (style == INSET || style == OUTSET || style == RIDGE || style == GROOVE) 726 c.setRGB(238, 238, 238); 727 else 728 c = textcolor; 729 } 730 731 switch (style) { 732 case BNONE: 733 case BHIDDEN: 734 return; 735 case DOTTED: 736 case DASHED: 737 graphicsContext->setStrokeColor(c, m_style->colorSpace()); 738 graphicsContext->setStrokeThickness(width); 739 graphicsContext->setStrokeStyle(style == DASHED ? DashedStroke : DottedStroke); 740 741 if (width > 0) 742 switch (s) { 743 case BSBottom: 744 case BSTop: 745 graphicsContext->drawLine(IntPoint(x1, (y1 + y2) / 2), IntPoint(x2, (y1 + y2) / 2)); 746 break; 747 case BSRight: 748 case BSLeft: 749 graphicsContext->drawLine(IntPoint((x1 + x2) / 2, y1), IntPoint((x1 + x2) / 2, y2)); 750 break; 751 } 752 break; 753 case DOUBLE: { 754 int third = (width + 1) / 3; 755 756 if (adjbw1 == 0 && adjbw2 == 0) { 757 graphicsContext->setStrokeStyle(NoStroke); 758 graphicsContext->setFillColor(c, m_style->colorSpace()); 759 switch (s) { 760 case BSTop: 761 case BSBottom: 762 graphicsContext->drawRect(IntRect(x1, y1, x2 - x1, third)); 763 graphicsContext->drawRect(IntRect(x1, y2 - third, x2 - x1, third)); 764 break; 765 case BSLeft: 766 graphicsContext->drawRect(IntRect(x1, y1 + 1, third, y2 - y1 - 1)); 767 graphicsContext->drawRect(IntRect(x2 - third, y1 + 1, third, y2 - y1 - 1)); 768 break; 769 case BSRight: 770 graphicsContext->drawRect(IntRect(x1, y1 + 1, third, y2 - y1 - 1)); 771 graphicsContext->drawRect(IntRect(x2 - third, y1 + 1, third, y2 - y1 - 1)); 772 break; 773 } 774 } else { 775 int adjbw1bigthird = ((adjbw1 > 0) ? adjbw1 + 1 : adjbw1 - 1) / 3; 776 int adjbw2bigthird = ((adjbw2 > 0) ? adjbw2 + 1 : adjbw2 - 1) / 3; 777 778 switch (s) { 779 case BSTop: 780 drawLineForBoxSide(graphicsContext, x1 + max((-adjbw1 * 2 + 1) / 3, 0), 781 y1, x2 - max((-adjbw2 * 2 + 1) / 3, 0), y1 + third, 782 s, c, textcolor, SOLID, adjbw1bigthird, adjbw2bigthird); 783 drawLineForBoxSide(graphicsContext, x1 + max((adjbw1 * 2 + 1) / 3, 0), 784 y2 - third, x2 - max((adjbw2 * 2 + 1) / 3, 0), y2, 785 s, c, textcolor, SOLID, adjbw1bigthird, adjbw2bigthird); 786 break; 787 case BSLeft: 788 drawLineForBoxSide(graphicsContext, x1, y1 + max((-adjbw1 * 2 + 1) / 3, 0), 789 x1 + third, y2 - max((-adjbw2 * 2 + 1) / 3, 0), 790 s, c, textcolor, SOLID, adjbw1bigthird, adjbw2bigthird); 791 drawLineForBoxSide(graphicsContext, x2 - third, y1 + max((adjbw1 * 2 + 1) / 3, 0), 792 x2, y2 - max((adjbw2 * 2 + 1) / 3, 0), 793 s, c, textcolor, SOLID, adjbw1bigthird, adjbw2bigthird); 794 break; 795 case BSBottom: 796 drawLineForBoxSide(graphicsContext, x1 + max((adjbw1 * 2 + 1) / 3, 0), 797 y1, x2 - max((adjbw2 * 2 + 1) / 3, 0), y1 + third, 798 s, c, textcolor, SOLID, adjbw1bigthird, adjbw2bigthird); 799 drawLineForBoxSide(graphicsContext, x1 + max((-adjbw1 * 2 + 1) / 3, 0), 800 y2 - third, x2 - max((-adjbw2 * 2 + 1) / 3, 0), y2, 801 s, c, textcolor, SOLID, adjbw1bigthird, adjbw2bigthird); 802 break; 803 case BSRight: 804 drawLineForBoxSide(graphicsContext, x1, y1 + max((adjbw1 * 2 + 1) / 3, 0), 805 x1 + third, y2 - max((adjbw2 * 2 + 1) / 3, 0), 806 s, c, textcolor, SOLID, adjbw1bigthird, adjbw2bigthird); 807 drawLineForBoxSide(graphicsContext, x2 - third, y1 + max((-adjbw1 * 2 + 1) / 3, 0), 808 x2, y2 - max((-adjbw2 * 2 + 1) / 3, 0), 809 s, c, textcolor, SOLID, adjbw1bigthird, adjbw2bigthird); 810 break; 811 default: 812 break; 813 } 814 } 815 break; 816 } 817 case RIDGE: 818 case GROOVE: 819 { 820 EBorderStyle s1; 821 EBorderStyle s2; 822 if (style == GROOVE) { 823 s1 = INSET; 824 s2 = OUTSET; 825 } else { 826 s1 = OUTSET; 827 s2 = INSET; 828 } 829 830 int adjbw1bighalf = ((adjbw1 > 0) ? adjbw1 + 1 : adjbw1 - 1) / 2; 831 int adjbw2bighalf = ((adjbw2 > 0) ? adjbw2 + 1 : adjbw2 - 1) / 2; 832 833 switch (s) { 834 case BSTop: 835 drawLineForBoxSide(graphicsContext, x1 + max(-adjbw1, 0) / 2, y1, x2 - max(-adjbw2, 0) / 2, (y1 + y2 + 1) / 2, 836 s, c, textcolor, s1, adjbw1bighalf, adjbw2bighalf); 837 drawLineForBoxSide(graphicsContext, x1 + max(adjbw1 + 1, 0) / 2, (y1 + y2 + 1) / 2, x2 - max(adjbw2 + 1, 0) / 2, y2, 838 s, c, textcolor, s2, adjbw1 / 2, adjbw2 / 2); 839 break; 840 case BSLeft: 841 drawLineForBoxSide(graphicsContext, x1, y1 + max(-adjbw1, 0) / 2, (x1 + x2 + 1) / 2, y2 - max(-adjbw2, 0) / 2, 842 s, c, textcolor, s1, adjbw1bighalf, adjbw2bighalf); 843 drawLineForBoxSide(graphicsContext, (x1 + x2 + 1) / 2, y1 + max(adjbw1 + 1, 0) / 2, x2, y2 - max(adjbw2 + 1, 0) / 2, 844 s, c, textcolor, s2, adjbw1 / 2, adjbw2 / 2); 845 break; 846 case BSBottom: 847 drawLineForBoxSide(graphicsContext, x1 + max(adjbw1, 0) / 2, y1, x2 - max(adjbw2, 0) / 2, (y1 + y2 + 1) / 2, 848 s, c, textcolor, s2, adjbw1bighalf, adjbw2bighalf); 849 drawLineForBoxSide(graphicsContext, x1 + max(-adjbw1 + 1, 0) / 2, (y1 + y2 + 1) / 2, x2 - max(-adjbw2 + 1, 0) / 2, y2, 850 s, c, textcolor, s1, adjbw1/2, adjbw2/2); 851 break; 852 case BSRight: 853 drawLineForBoxSide(graphicsContext, x1, y1 + max(adjbw1, 0) / 2, (x1 + x2 + 1) / 2, y2 - max(adjbw2, 0) / 2, 854 s, c, textcolor, s2, adjbw1bighalf, adjbw2bighalf); 855 drawLineForBoxSide(graphicsContext, (x1 + x2 + 1) / 2, y1 + max(-adjbw1 + 1, 0) / 2, x2, y2 - max(-adjbw2 + 1, 0) / 2, 856 s, c, textcolor, s1, adjbw1/2, adjbw2/2); 857 break; 858 } 859 break; 860 } 861 case INSET: 862 if (s == BSTop || s == BSLeft) 863 c = c.dark(); 864 // fall through 865 case OUTSET: 866 if (style == OUTSET && (s == BSBottom || s == BSRight)) 867 c = c.dark(); 868 // fall through 869 case SOLID: { 870 graphicsContext->setStrokeStyle(NoStroke); 871 graphicsContext->setFillColor(c, m_style->colorSpace()); 872 ASSERT(x2 >= x1); 873 ASSERT(y2 >= y1); 874 if (!adjbw1 && !adjbw2) { 875 graphicsContext->drawRect(IntRect(x1, y1, x2 - x1, y2 - y1)); 876 return; 877 } 878 FloatPoint quad[4]; 879 switch (s) { 880 case BSTop: 881 quad[0] = FloatPoint(x1 + max(-adjbw1, 0), y1); 882 quad[1] = FloatPoint(x1 + max(adjbw1, 0), y2); 883 quad[2] = FloatPoint(x2 - max(adjbw2, 0), y2); 884 quad[3] = FloatPoint(x2 - max(-adjbw2, 0), y1); 885 break; 886 case BSBottom: 887 quad[0] = FloatPoint(x1 + max(adjbw1, 0), y1); 888 quad[1] = FloatPoint(x1 + max(-adjbw1, 0), y2); 889 quad[2] = FloatPoint(x2 - max(-adjbw2, 0), y2); 890 quad[3] = FloatPoint(x2 - max(adjbw2, 0), y1); 891 break; 892 case BSLeft: 893 quad[0] = FloatPoint(x1, y1 + max(-adjbw1, 0)); 894 quad[1] = FloatPoint(x1, y2 - max(-adjbw2, 0)); 895 quad[2] = FloatPoint(x2, y2 - max(adjbw2, 0)); 896 quad[3] = FloatPoint(x2, y1 + max(adjbw1, 0)); 897 break; 898 case BSRight: 899 quad[0] = FloatPoint(x1, y1 + max(adjbw1, 0)); 900 quad[1] = FloatPoint(x1, y2 - max(adjbw2, 0)); 901 quad[2] = FloatPoint(x2, y2 - max(-adjbw2, 0)); 902 quad[3] = FloatPoint(x2, y1 + max(-adjbw1, 0)); 903 break; 904 } 905 graphicsContext->drawConvexPolygon(4, quad); 906 break; 907 } 908 } 909 } 910 911 void RenderObject::drawArcForBoxSide(GraphicsContext* graphicsContext, int x, int y, float thickness, IntSize radius, 912 int angleStart, int angleSpan, BoxSide s, Color c, const Color& textColor, 913 EBorderStyle style, bool firstCorner) 914 { 915 if ((style == DOUBLE && thickness / 2 < 3) || ((style == RIDGE || style == GROOVE) && thickness / 2 < 2)) 916 style = SOLID; 917 918 if (!c.isValid()) { 919 if (style == INSET || style == OUTSET || style == RIDGE || style == GROOVE) 920 c.setRGB(238, 238, 238); 921 else 922 c = textColor; 923 } 924 925 switch (style) { 926 case BNONE: 927 case BHIDDEN: 928 return; 929 case DOTTED: 930 case DASHED: 931 graphicsContext->setStrokeColor(c, m_style->colorSpace()); 932 graphicsContext->setStrokeStyle(style == DOTTED ? DottedStroke : DashedStroke); 933 graphicsContext->setStrokeThickness(thickness); 934 graphicsContext->strokeArc(IntRect(x, y, radius.width() * 2, radius.height() * 2), angleStart, angleSpan); 935 break; 936 case DOUBLE: { 937 float third = thickness / 3.0f; 938 float innerThird = (thickness + 1.0f) / 6.0f; 939 int shiftForInner = static_cast<int>(innerThird * 2.5f); 940 941 int outerY = y; 942 int outerHeight = radius.height() * 2; 943 int innerX = x + shiftForInner; 944 int innerY = y + shiftForInner; 945 int innerWidth = (radius.width() - shiftForInner) * 2; 946 int innerHeight = (radius.height() - shiftForInner) * 2; 947 if (innerThird > 1 && (s == BSTop || (firstCorner && (s == BSLeft || s == BSRight)))) { 948 outerHeight += 2; 949 innerHeight += 2; 950 } 951 952 graphicsContext->setStrokeStyle(SolidStroke); 953 graphicsContext->setStrokeColor(c, m_style->colorSpace()); 954 graphicsContext->setStrokeThickness(third); 955 graphicsContext->strokeArc(IntRect(x, outerY, radius.width() * 2, outerHeight), angleStart, angleSpan); 956 graphicsContext->setStrokeThickness(innerThird > 2 ? innerThird - 1 : innerThird); 957 graphicsContext->strokeArc(IntRect(innerX, innerY, innerWidth, innerHeight), angleStart, angleSpan); 958 break; 959 } 960 case GROOVE: 961 case RIDGE: { 962 Color c2; 963 if ((style == RIDGE && (s == BSTop || s == BSLeft)) || 964 (style == GROOVE && (s == BSBottom || s == BSRight))) 965 c2 = c.dark(); 966 else { 967 c2 = c; 968 c = c.dark(); 969 } 970 971 graphicsContext->setStrokeStyle(SolidStroke); 972 graphicsContext->setStrokeColor(c, m_style->colorSpace()); 973 graphicsContext->setStrokeThickness(thickness); 974 graphicsContext->strokeArc(IntRect(x, y, radius.width() * 2, radius.height() * 2), angleStart, angleSpan); 975 976 float halfThickness = (thickness + 1.0f) / 4.0f; 977 int shiftForInner = static_cast<int>(halfThickness * 1.5f); 978 graphicsContext->setStrokeColor(c2, m_style->colorSpace()); 979 graphicsContext->setStrokeThickness(halfThickness > 2 ? halfThickness - 1 : halfThickness); 980 graphicsContext->strokeArc(IntRect(x + shiftForInner, y + shiftForInner, (radius.width() - shiftForInner) * 2, 981 (radius.height() - shiftForInner) * 2), angleStart, angleSpan); 982 break; 983 } 984 case INSET: 985 if (s == BSTop || s == BSLeft) 986 c = c.dark(); 987 case OUTSET: 988 if (style == OUTSET && (s == BSBottom || s == BSRight)) 989 c = c.dark(); 990 case SOLID: 991 graphicsContext->setStrokeStyle(SolidStroke); 992 graphicsContext->setStrokeColor(c, m_style->colorSpace()); 993 graphicsContext->setStrokeThickness(thickness); 994 graphicsContext->strokeArc(IntRect(x, y, radius.width() * 2, radius.height() * 2), angleStart, angleSpan); 995 break; 996 } 997 } 998 999 void RenderObject::addPDFURLRect(GraphicsContext* context, const IntRect& rect) 1000 { 1001 if (rect.isEmpty()) 1002 return; 1003 Node* n = node(); 1004 if (!n || !n->isLink() || !n->isElementNode()) 1005 return; 1006 const AtomicString& href = static_cast<Element*>(n)->getAttribute(hrefAttr); 1007 if (href.isNull()) 1008 return; 1009 context->setURLForRect(n->document()->completeURL(href), rect); 1010 } 1011 1012 void RenderObject::paintOutline(GraphicsContext* graphicsContext, int tx, int ty, int w, int h, const RenderStyle* style) 1013 { 1014 if (!hasOutline()) 1015 return; 1016 1017 int ow = style->outlineWidth(); 1018 EBorderStyle os = style->outlineStyle(); 1019 1020 Color oc = style->outlineColor(); 1021 if (!oc.isValid()) 1022 oc = style->color(); 1023 1024 int offset = style->outlineOffset(); 1025 1026 if (style->outlineStyleIsAuto() || hasOutlineAnnotation()) { 1027 if (!theme()->supportsFocusRing(style)) { 1028 // Only paint the focus ring by hand if the theme isn't able to draw the focus ring. 1029 Vector<IntRect> focusRingRects; 1030 addFocusRingRects(focusRingRects, tx, ty); 1031 if (style->outlineStyleIsAuto()) 1032 graphicsContext->drawFocusRing(focusRingRects, ow, offset, oc); 1033 else 1034 addPDFURLRect(graphicsContext, unionRect(focusRingRects)); 1035 } 1036 } 1037 1038 if (style->outlineStyleIsAuto() || style->outlineStyle() == BNONE) 1039 return; 1040 1041 tx -= offset; 1042 ty -= offset; 1043 w += 2 * offset; 1044 h += 2 * offset; 1045 1046 if (h < 0 || w < 0) 1047 return; 1048 1049 drawLineForBoxSide(graphicsContext, tx - ow, ty - ow, tx, ty + h + ow, 1050 BSLeft, Color(oc), style->color(), os, ow, ow); 1051 1052 drawLineForBoxSide(graphicsContext, tx - ow, ty - ow, tx + w + ow, ty, 1053 BSTop, Color(oc), style->color(), os, ow, ow); 1054 1055 drawLineForBoxSide(graphicsContext, tx + w, ty - ow, tx + w + ow, ty + h + ow, 1056 BSRight, Color(oc), style->color(), os, ow, ow); 1057 1058 drawLineForBoxSide(graphicsContext, tx - ow, ty + h, tx + w + ow, ty + h + ow, 1059 BSBottom, Color(oc), style->color(), os, ow, ow); 1060 } 1061 1062 IntRect RenderObject::absoluteBoundingBoxRect(bool useTransforms) 1063 { 1064 if (useTransforms) { 1065 Vector<FloatQuad> quads; 1066 absoluteQuads(quads); 1067 1068 size_t n = quads.size(); 1069 if (!n) 1070 return IntRect(); 1071 1072 IntRect result = quads[0].enclosingBoundingBox(); 1073 for (size_t i = 1; i < n; ++i) 1074 result.unite(quads[i].enclosingBoundingBox()); 1075 return result; 1076 } 1077 1078 FloatPoint absPos = localToAbsolute(); 1079 Vector<IntRect> rects; 1080 absoluteRects(rects, absPos.x(), absPos.y()); 1081 1082 size_t n = rects.size(); 1083 if (!n) 1084 return IntRect(); 1085 1086 IntRect result = rects[0]; 1087 for (size_t i = 1; i < n; ++i) 1088 result.unite(rects[i]); 1089 return result; 1090 } 1091 1092 void RenderObject::absoluteFocusRingQuads(Vector<FloatQuad>& quads) 1093 { 1094 Vector<IntRect> rects; 1095 // FIXME: addFocusRingRects() needs to be passed this transform-unaware 1096 // localToAbsolute() offset here because RenderInline::addFocusRingRects() 1097 // implicitly assumes that. This doesn't work correctly with transformed 1098 // descendants. 1099 FloatPoint absolutePoint = localToAbsolute(); 1100 addFocusRingRects(rects, absolutePoint.x(), absolutePoint.y()); 1101 size_t count = rects.size(); 1102 for (size_t i = 0; i < count; ++i) { 1103 IntRect rect = rects[i]; 1104 rect.move(-absolutePoint.x(), -absolutePoint.y()); 1105 quads.append(localToAbsoluteQuad(FloatQuad(rect))); 1106 } 1107 } 1108 1109 void RenderObject::addAbsoluteRectForLayer(IntRect& result) 1110 { 1111 if (hasLayer()) 1112 result.unite(absoluteBoundingBoxRect()); 1113 for (RenderObject* current = firstChild(); current; current = current->nextSibling()) 1114 current->addAbsoluteRectForLayer(result); 1115 } 1116 1117 IntRect RenderObject::paintingRootRect(IntRect& topLevelRect) 1118 { 1119 IntRect result = absoluteBoundingBoxRect(); 1120 topLevelRect = result; 1121 for (RenderObject* current = firstChild(); current; current = current->nextSibling()) 1122 current->addAbsoluteRectForLayer(result); 1123 return result; 1124 } 1125 1126 void RenderObject::paint(PaintInfo& /*paintInfo*/, int /*tx*/, int /*ty*/) 1127 { 1128 } 1129 1130 RenderBoxModelObject* RenderObject::containerForRepaint() const 1131 { 1132 #if USE(ACCELERATED_COMPOSITING) 1133 if (RenderView* v = view()) { 1134 if (v->usesCompositing()) { 1135 RenderLayer* compLayer = enclosingLayer()->enclosingCompositingLayer(); 1136 return compLayer ? compLayer->renderer() : 0; 1137 } 1138 } 1139 #endif 1140 // Do root-relative repaint. 1141 return 0; 1142 } 1143 1144 void RenderObject::repaintUsingContainer(RenderBoxModelObject* repaintContainer, const IntRect& r, bool immediate) 1145 { 1146 if (!repaintContainer || repaintContainer->isRenderView()) { 1147 RenderView* v = repaintContainer ? toRenderView(repaintContainer) : view(); 1148 v->repaintViewRectangle(r, immediate); 1149 } else { 1150 #if USE(ACCELERATED_COMPOSITING) 1151 RenderView* v = view(); 1152 if (v->usesCompositing()) { 1153 ASSERT(repaintContainer->hasLayer() && repaintContainer->layer()->isComposited()); 1154 repaintContainer->layer()->setBackingNeedsRepaintInRect(r); 1155 } 1156 #else 1157 ASSERT_NOT_REACHED(); 1158 #endif 1159 } 1160 } 1161 1162 void RenderObject::repaint(bool immediate) 1163 { 1164 // Don't repaint if we're unrooted (note that view() still returns the view when unrooted) 1165 RenderView* view; 1166 if (!isRooted(&view)) 1167 return; 1168 1169 if (view->printing()) 1170 return; // Don't repaint if we're printing. 1171 1172 RenderBoxModelObject* repaintContainer = containerForRepaint(); 1173 repaintUsingContainer(repaintContainer ? repaintContainer : view, clippedOverflowRectForRepaint(repaintContainer), immediate); 1174 } 1175 1176 void RenderObject::repaintRectangle(const IntRect& r, bool immediate) 1177 { 1178 // Don't repaint if we're unrooted (note that view() still returns the view when unrooted) 1179 RenderView* view; 1180 if (!isRooted(&view)) 1181 return; 1182 1183 if (view->printing()) 1184 return; // Don't repaint if we're printing. 1185 1186 IntRect dirtyRect(r); 1187 1188 // FIXME: layoutDelta needs to be applied in parts before/after transforms and 1189 // repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308 1190 dirtyRect.move(view->layoutDelta()); 1191 1192 RenderBoxModelObject* repaintContainer = containerForRepaint(); 1193 computeRectForRepaint(repaintContainer, dirtyRect); 1194 repaintUsingContainer(repaintContainer ? repaintContainer : view, dirtyRect, immediate); 1195 } 1196 1197 bool RenderObject::repaintAfterLayoutIfNeeded(RenderBoxModelObject* repaintContainer, const IntRect& oldBounds, const IntRect& oldOutlineBox) 1198 { 1199 RenderView* v = view(); 1200 if (v->printing()) 1201 return false; // Don't repaint if we're printing. 1202 1203 IntRect newBounds = clippedOverflowRectForRepaint(repaintContainer); 1204 IntRect newOutlineBox; 1205 1206 bool fullRepaint = selfNeedsLayout(); 1207 // Presumably a background or a border exists if border-fit:lines was specified. 1208 if (!fullRepaint && style()->borderFit() == BorderFitLines) 1209 fullRepaint = true; 1210 if (!fullRepaint) { 1211 newOutlineBox = outlineBoundsForRepaint(repaintContainer); 1212 if (newOutlineBox.location() != oldOutlineBox.location() || (mustRepaintBackgroundOrBorder() && (newBounds != oldBounds || newOutlineBox != oldOutlineBox))) 1213 fullRepaint = true; 1214 } 1215 1216 if (!repaintContainer) 1217 repaintContainer = v; 1218 1219 if (fullRepaint) { 1220 repaintUsingContainer(repaintContainer, oldBounds); 1221 if (newBounds != oldBounds) 1222 repaintUsingContainer(repaintContainer, newBounds); 1223 return true; 1224 } 1225 1226 if (newBounds == oldBounds && newOutlineBox == oldOutlineBox) 1227 return false; 1228 1229 int deltaLeft = newBounds.x() - oldBounds.x(); 1230 if (deltaLeft > 0) 1231 repaintUsingContainer(repaintContainer, IntRect(oldBounds.x(), oldBounds.y(), deltaLeft, oldBounds.height())); 1232 else if (deltaLeft < 0) 1233 repaintUsingContainer(repaintContainer, IntRect(newBounds.x(), newBounds.y(), -deltaLeft, newBounds.height())); 1234 1235 int deltaRight = newBounds.right() - oldBounds.right(); 1236 if (deltaRight > 0) 1237 repaintUsingContainer(repaintContainer, IntRect(oldBounds.right(), newBounds.y(), deltaRight, newBounds.height())); 1238 else if (deltaRight < 0) 1239 repaintUsingContainer(repaintContainer, IntRect(newBounds.right(), oldBounds.y(), -deltaRight, oldBounds.height())); 1240 1241 int deltaTop = newBounds.y() - oldBounds.y(); 1242 if (deltaTop > 0) 1243 repaintUsingContainer(repaintContainer, IntRect(oldBounds.x(), oldBounds.y(), oldBounds.width(), deltaTop)); 1244 else if (deltaTop < 0) 1245 repaintUsingContainer(repaintContainer, IntRect(newBounds.x(), newBounds.y(), newBounds.width(), -deltaTop)); 1246 1247 int deltaBottom = newBounds.bottom() - oldBounds.bottom(); 1248 if (deltaBottom > 0) 1249 repaintUsingContainer(repaintContainer, IntRect(newBounds.x(), oldBounds.bottom(), newBounds.width(), deltaBottom)); 1250 else if (deltaBottom < 0) 1251 repaintUsingContainer(repaintContainer, IntRect(oldBounds.x(), newBounds.bottom(), oldBounds.width(), -deltaBottom)); 1252 1253 if (newOutlineBox == oldOutlineBox) 1254 return false; 1255 1256 // We didn't move, but we did change size. Invalidate the delta, which will consist of possibly 1257 // two rectangles (but typically only one). 1258 RenderStyle* outlineStyle = outlineStyleForRepaint(); 1259 int ow = outlineStyle->outlineSize(); 1260 int width = abs(newOutlineBox.width() - oldOutlineBox.width()); 1261 if (width) { 1262 int shadowLeft; 1263 int shadowRight; 1264 style()->getBoxShadowHorizontalExtent(shadowLeft, shadowRight); 1265 1266 int borderRight = isBox() ? toRenderBox(this)->borderRight() : 0; 1267 int borderWidth = max(-outlineStyle->outlineOffset(), max(borderRight, max(style()->borderTopRightRadius().width(), style()->borderBottomRightRadius().width()))) + max(ow, shadowRight); 1268 IntRect rightRect(newOutlineBox.x() + min(newOutlineBox.width(), oldOutlineBox.width()) - borderWidth, 1269 newOutlineBox.y(), 1270 width + borderWidth, 1271 max(newOutlineBox.height(), oldOutlineBox.height())); 1272 int right = min(newBounds.right(), oldBounds.right()); 1273 if (rightRect.x() < right) { 1274 rightRect.setWidth(min(rightRect.width(), right - rightRect.x())); 1275 repaintUsingContainer(repaintContainer, rightRect); 1276 } 1277 } 1278 int height = abs(newOutlineBox.height() - oldOutlineBox.height()); 1279 if (height) { 1280 int shadowTop; 1281 int shadowBottom; 1282 style()->getBoxShadowVerticalExtent(shadowTop, shadowBottom); 1283 1284 int borderBottom = isBox() ? toRenderBox(this)->borderBottom() : 0; 1285 int borderHeight = max(-outlineStyle->outlineOffset(), max(borderBottom, max(style()->borderBottomLeftRadius().height(), style()->borderBottomRightRadius().height()))) + max(ow, shadowBottom); 1286 IntRect bottomRect(newOutlineBox.x(), 1287 min(newOutlineBox.bottom(), oldOutlineBox.bottom()) - borderHeight, 1288 max(newOutlineBox.width(), oldOutlineBox.width()), 1289 height + borderHeight); 1290 int bottom = min(newBounds.bottom(), oldBounds.bottom()); 1291 if (bottomRect.y() < bottom) { 1292 bottomRect.setHeight(min(bottomRect.height(), bottom - bottomRect.y())); 1293 repaintUsingContainer(repaintContainer, bottomRect); 1294 } 1295 } 1296 return false; 1297 } 1298 1299 void RenderObject::repaintDuringLayoutIfMoved(const IntRect&) 1300 { 1301 } 1302 1303 void RenderObject::repaintOverhangingFloats(bool) 1304 { 1305 } 1306 1307 bool RenderObject::checkForRepaintDuringLayout() const 1308 { 1309 // FIXME: <https://bugs.webkit.org/show_bug.cgi?id=20885> It is probably safe to also require 1310 // m_everHadLayout. Currently, only RenderBlock::layoutBlock() adds this condition. See also 1311 // <https://bugs.webkit.org/show_bug.cgi?id=15129>. 1312 return !document()->view()->needsFullRepaint() && !hasLayer(); 1313 } 1314 1315 IntRect RenderObject::rectWithOutlineForRepaint(RenderBoxModelObject* repaintContainer, int outlineWidth) 1316 { 1317 IntRect r(clippedOverflowRectForRepaint(repaintContainer)); 1318 r.inflate(outlineWidth); 1319 return r; 1320 } 1321 1322 IntRect RenderObject::clippedOverflowRectForRepaint(RenderBoxModelObject*) 1323 { 1324 ASSERT_NOT_REACHED(); 1325 return IntRect(); 1326 } 1327 1328 void RenderObject::computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect& rect, bool fixed) 1329 { 1330 if (repaintContainer == this) 1331 return; 1332 1333 if (RenderObject* o = parent()) { 1334 if (o->isBlockFlow()) { 1335 RenderBlock* cb = toRenderBlock(o); 1336 if (cb->hasColumns()) 1337 cb->adjustRectForColumns(rect); 1338 } 1339 1340 if (o->hasOverflowClip()) { 1341 // o->height() is inaccurate if we're in the middle of a layout of |o|, so use the 1342 // layer's size instead. Even if the layer's size is wrong, the layer itself will repaint 1343 // anyway if its size does change. 1344 RenderBox* boxParent = toRenderBox(o); 1345 1346 IntRect boxRect(0, 0, boxParent->layer()->width(), boxParent->layer()->height()); 1347 int x = rect.x(); 1348 int y = rect.y(); 1349 boxParent->layer()->subtractScrolledContentOffset(x, y); // For overflow:auto/scroll/hidden. 1350 IntRect repaintRect(x, y, rect.width(), rect.height()); 1351 rect = intersection(repaintRect, boxRect); 1352 if (rect.isEmpty()) 1353 return; 1354 } 1355 1356 o->computeRectForRepaint(repaintContainer, rect, fixed); 1357 } 1358 } 1359 1360 void RenderObject::dirtyLinesFromChangedChild(RenderObject*) 1361 { 1362 } 1363 1364 #ifndef NDEBUG 1365 1366 void RenderObject::showTreeForThis() const 1367 { 1368 if (node()) 1369 node()->showTreeForThis(); 1370 } 1371 1372 void RenderObject::showRenderObject() const 1373 { 1374 showRenderObject(0); 1375 } 1376 1377 void RenderObject::showRenderObject(int printedCharacters) const 1378 { 1379 // As this function is intended to be used when debugging, the 1380 // this pointer may be 0. 1381 if (!this) { 1382 fputs("(null)\n", stderr); 1383 return; 1384 } 1385 1386 printedCharacters += fprintf(stderr, "%s %p", renderName(), this); 1387 1388 if (node()) { 1389 if (printedCharacters) 1390 for (; printedCharacters < 39; printedCharacters++) 1391 fputc(' ', stderr); 1392 fputc('\t', stderr); 1393 node()->showNode(); 1394 } else 1395 fputc('\n', stderr); 1396 } 1397 1398 void RenderObject::showRenderTreeAndMark(const RenderObject* markedObject1, const char* markedLabel1, const RenderObject* markedObject2, const char* markedLabel2, int depth) const 1399 { 1400 int printedCharacters = 0; 1401 if (markedObject1 == this && markedLabel1) 1402 printedCharacters += fprintf(stderr, "%s", markedLabel1); 1403 if (markedObject2 == this && markedLabel2) 1404 printedCharacters += fprintf(stderr, "%s", markedLabel2); 1405 for (; printedCharacters < depth * 2; printedCharacters++) 1406 fputc(' ', stderr); 1407 1408 showRenderObject(printedCharacters); 1409 if (!this) 1410 return; 1411 1412 for (const RenderObject* child = firstChild(); child; child = child->nextSibling()) 1413 child->showRenderTreeAndMark(markedObject1, markedLabel1, markedObject2, markedLabel2, depth + 1); 1414 } 1415 1416 #endif // NDEBUG 1417 1418 Color RenderObject::selectionBackgroundColor() const 1419 { 1420 Color color; 1421 if (style()->userSelect() != SELECT_NONE) { 1422 RefPtr<RenderStyle> pseudoStyle = getUncachedPseudoStyle(SELECTION); 1423 if (pseudoStyle && pseudoStyle->backgroundColor().isValid()) 1424 color = pseudoStyle->backgroundColor().blendWithWhite(); 1425 else 1426 color = document()->frame()->selection()->isFocusedAndActive() ? 1427 theme()->activeSelectionBackgroundColor() : 1428 theme()->inactiveSelectionBackgroundColor(); 1429 } 1430 1431 return color; 1432 } 1433 1434 Color RenderObject::selectionForegroundColor() const 1435 { 1436 Color color; 1437 if (style()->userSelect() == SELECT_NONE) 1438 return color; 1439 1440 if (RefPtr<RenderStyle> pseudoStyle = getUncachedPseudoStyle(SELECTION)) { 1441 color = pseudoStyle->textFillColor(); 1442 if (!color.isValid()) 1443 color = pseudoStyle->color(); 1444 } else 1445 color = document()->frame()->selection()->isFocusedAndActive() ? 1446 theme()->activeSelectionForegroundColor() : 1447 theme()->inactiveSelectionForegroundColor(); 1448 1449 return color; 1450 } 1451 1452 #if ENABLE(DRAG_SUPPORT) 1453 Node* RenderObject::draggableNode(bool dhtmlOK, bool uaOK, int x, int y, bool& dhtmlWillDrag) const 1454 { 1455 if (!dhtmlOK && !uaOK) 1456 return 0; 1457 1458 for (const RenderObject* curr = this; curr; curr = curr->parent()) { 1459 Node* elt = curr->node(); 1460 if (elt && elt->nodeType() == Node::TEXT_NODE) { 1461 // Since there's no way for the author to address the -webkit-user-drag style for a text node, 1462 // we use our own judgement. 1463 if (uaOK && view()->frameView()->frame()->eventHandler()->shouldDragAutoNode(curr->node(), IntPoint(x, y))) { 1464 dhtmlWillDrag = false; 1465 return curr->node(); 1466 } 1467 if (elt->canStartSelection()) 1468 // In this case we have a click in the unselected portion of text. If this text is 1469 // selectable, we want to start the selection process instead of looking for a parent 1470 // to try to drag. 1471 return 0; 1472 } else { 1473 EUserDrag dragMode = curr->style()->userDrag(); 1474 if (dhtmlOK && dragMode == DRAG_ELEMENT) { 1475 dhtmlWillDrag = true; 1476 return curr->node(); 1477 } 1478 if (uaOK && dragMode == DRAG_AUTO 1479 && view()->frameView()->frame()->eventHandler()->shouldDragAutoNode(curr->node(), IntPoint(x, y))) { 1480 dhtmlWillDrag = false; 1481 return curr->node(); 1482 } 1483 } 1484 } 1485 return 0; 1486 } 1487 #endif // ENABLE(DRAG_SUPPORT) 1488 1489 void RenderObject::selectionStartEnd(int& spos, int& epos) const 1490 { 1491 view()->selectionStartEnd(spos, epos); 1492 } 1493 1494 void RenderObject::handleDynamicFloatPositionChange() 1495 { 1496 // We have gone from not affecting the inline status of the parent flow to suddenly 1497 // having an impact. See if there is a mismatch between the parent flow's 1498 // childrenInline() state and our state. 1499 setInline(style()->isDisplayInlineType()); 1500 if (isInline() != parent()->childrenInline()) { 1501 if (!isInline()) 1502 toRenderBoxModelObject(parent())->childBecameNonInline(this); 1503 else { 1504 // An anonymous block must be made to wrap this inline. 1505 RenderBlock* block = toRenderBlock(parent())->createAnonymousBlock(); 1506 RenderObjectChildList* childlist = parent()->virtualChildren(); 1507 childlist->insertChildNode(parent(), block, this); 1508 block->children()->appendChildNode(block, childlist->removeChildNode(parent(), this)); 1509 } 1510 } 1511 } 1512 1513 void RenderObject::setAnimatableStyle(PassRefPtr<RenderStyle> style) 1514 { 1515 if (!isText() && style) 1516 setStyle(animation()->updateAnimations(this, style.get())); 1517 else 1518 setStyle(style); 1519 } 1520 1521 StyleDifference RenderObject::adjustStyleDifference(StyleDifference diff, unsigned contextSensitiveProperties) const 1522 { 1523 #if USE(ACCELERATED_COMPOSITING) 1524 // If transform changed, and we are not composited, need to do a layout. 1525 if (contextSensitiveProperties & ContextSensitivePropertyTransform) { 1526 // Text nodes share style with their parents but transforms don't apply to them, 1527 // hence the !isText() check. 1528 // FIXME: when transforms are taken into account for overflow, we will need to do a layout. 1529 if (!isText() && (!hasLayer() || !toRenderBoxModelObject(this)->layer()->isComposited())) 1530 diff = StyleDifferenceLayout; 1531 else if (diff < StyleDifferenceRecompositeLayer) 1532 diff = StyleDifferenceRecompositeLayer; 1533 } 1534 1535 // If opacity changed, and we are not composited, need to repaint (also 1536 // ignoring text nodes) 1537 if (contextSensitiveProperties & ContextSensitivePropertyOpacity) { 1538 if (!isText() && (!hasLayer() || !toRenderBoxModelObject(this)->layer()->isComposited())) 1539 diff = StyleDifferenceRepaintLayer; 1540 else if (diff < StyleDifferenceRecompositeLayer) 1541 diff = StyleDifferenceRecompositeLayer; 1542 } 1543 #else 1544 UNUSED_PARAM(contextSensitiveProperties); 1545 #endif 1546 1547 // If we have no layer(), just treat a RepaintLayer hint as a normal Repaint. 1548 if (diff == StyleDifferenceRepaintLayer && !hasLayer()) 1549 diff = StyleDifferenceRepaint; 1550 1551 return diff; 1552 } 1553 1554 void RenderObject::setStyle(PassRefPtr<RenderStyle> style) 1555 { 1556 if (m_style == style) 1557 return; 1558 1559 StyleDifference diff = StyleDifferenceEqual; 1560 unsigned contextSensitiveProperties = ContextSensitivePropertyNone; 1561 if (m_style) 1562 diff = m_style->diff(style.get(), contextSensitiveProperties); 1563 1564 diff = adjustStyleDifference(diff, contextSensitiveProperties); 1565 1566 styleWillChange(diff, style.get()); 1567 1568 RefPtr<RenderStyle> oldStyle = m_style.release(); 1569 m_style = style; 1570 1571 updateFillImages(oldStyle ? oldStyle->backgroundLayers() : 0, m_style ? m_style->backgroundLayers() : 0); 1572 updateFillImages(oldStyle ? oldStyle->maskLayers() : 0, m_style ? m_style->maskLayers() : 0); 1573 1574 updateImage(oldStyle ? oldStyle->borderImage().image() : 0, m_style ? m_style->borderImage().image() : 0); 1575 updateImage(oldStyle ? oldStyle->maskBoxImage().image() : 0, m_style ? m_style->maskBoxImage().image() : 0); 1576 1577 // We need to ensure that view->maximalOutlineSize() is valid for any repaints that happen 1578 // during styleDidChange (it's used by clippedOverflowRectForRepaint()). 1579 if (m_style->outlineWidth() > 0 && m_style->outlineSize() > maximalOutlineSize(PaintPhaseOutline)) 1580 toRenderView(document()->renderer())->setMaximalOutlineSize(m_style->outlineSize()); 1581 1582 styleDidChange(diff, oldStyle.get()); 1583 1584 if (!m_parent || isText()) 1585 return; 1586 1587 // Now that the layer (if any) has been updated, we need to adjust the diff again, 1588 // check whether we should layout now, and decide if we need to repaint. 1589 StyleDifference updatedDiff = adjustStyleDifference(diff, contextSensitiveProperties); 1590 1591 if (diff <= StyleDifferenceLayoutPositionedMovementOnly) { 1592 if (updatedDiff == StyleDifferenceLayout) 1593 setNeedsLayoutAndPrefWidthsRecalc(); 1594 else if (updatedDiff == StyleDifferenceLayoutPositionedMovementOnly) 1595 setNeedsPositionedMovementLayout(); 1596 } 1597 1598 if (updatedDiff == StyleDifferenceRepaintLayer || updatedDiff == StyleDifferenceRepaint) { 1599 // Do a repaint with the new style now, e.g., for example if we go from 1600 // not having an outline to having an outline. 1601 repaint(); 1602 } 1603 } 1604 1605 void RenderObject::setStyleInternal(PassRefPtr<RenderStyle> style) 1606 { 1607 m_style = style; 1608 } 1609 1610 void RenderObject::styleWillChange(StyleDifference diff, const RenderStyle* newStyle) 1611 { 1612 if (m_style) { 1613 // If our z-index changes value or our visibility changes, 1614 // we need to dirty our stacking context's z-order list. 1615 if (newStyle) { 1616 bool visibilityChanged = m_style->visibility() != newStyle->visibility() 1617 || m_style->zIndex() != newStyle->zIndex() 1618 || m_style->hasAutoZIndex() != newStyle->hasAutoZIndex(); 1619 #if ENABLE(DASHBOARD_SUPPORT) 1620 if (visibilityChanged) 1621 document()->setDashboardRegionsDirty(true); 1622 #endif 1623 if (visibilityChanged && AXObjectCache::accessibilityEnabled()) 1624 document()->axObjectCache()->childrenChanged(this); 1625 1626 // Keep layer hierarchy visibility bits up to date if visibility changes. 1627 if (m_style->visibility() != newStyle->visibility()) { 1628 if (RenderLayer* l = enclosingLayer()) { 1629 if (newStyle->visibility() == VISIBLE) 1630 l->setHasVisibleContent(true); 1631 else if (l->hasVisibleContent() && (this == l->renderer() || l->renderer()->style()->visibility() != VISIBLE)) { 1632 l->dirtyVisibleContentStatus(); 1633 if (diff > StyleDifferenceRepaintLayer) 1634 repaint(); 1635 } 1636 } 1637 } 1638 } 1639 1640 if (m_parent && (diff == StyleDifferenceRepaint || newStyle->outlineSize() < m_style->outlineSize())) 1641 repaint(); 1642 if (isFloating() && (m_style->floating() != newStyle->floating())) 1643 // For changes in float styles, we need to conceivably remove ourselves 1644 // from the floating objects list. 1645 toRenderBox(this)->removeFloatingOrPositionedChildFromBlockLists(); 1646 else if (isPositioned() && (m_style->position() != newStyle->position())) 1647 // For changes in positioning styles, we need to conceivably remove ourselves 1648 // from the positioned objects list. 1649 toRenderBox(this)->removeFloatingOrPositionedChildFromBlockLists(); 1650 1651 s_affectsParentBlock = isFloatingOrPositioned() && 1652 (!newStyle->isFloating() && newStyle->position() != AbsolutePosition && newStyle->position() != FixedPosition) 1653 && parent() && (parent()->isBlockFlow() || parent()->isRenderInline()); 1654 1655 // reset style flags 1656 if (diff == StyleDifferenceLayout || diff == StyleDifferenceLayoutPositionedMovementOnly) { 1657 m_floating = false; 1658 m_positioned = false; 1659 m_relPositioned = false; 1660 } 1661 m_paintBackground = false; 1662 m_hasOverflowClip = false; 1663 m_hasTransform = false; 1664 m_hasReflection = false; 1665 } else 1666 s_affectsParentBlock = false; 1667 1668 if (view()->frameView()) { 1669 // FIXME: A better solution would be to only invalidate the fixed regions when scrolling. It's overkill to 1670 // prevent the entire view from blitting on a scroll. 1671 1672 bool shouldBlitOnFixedBackgroundImage = false; 1673 #if ENABLE(FAST_MOBILE_SCROLLING) 1674 // On low-powered/mobile devices, preventing blitting on a scroll can cause noticeable delays 1675 // when scrolling a page with a fixed background image. As an optimization, assuming there are 1676 // no fixed positoned elements on the page, we can acclerate scrolling (via blitting) if we 1677 // ignore the CSS property "background-attachment: fixed". 1678 shouldBlitOnFixedBackgroundImage = true; 1679 #endif 1680 1681 bool newStyleSlowScroll = newStyle && (newStyle->position() == FixedPosition 1682 || (!shouldBlitOnFixedBackgroundImage && newStyle->hasFixedBackgroundImage())); 1683 bool oldStyleSlowScroll = m_style && (m_style->position() == FixedPosition 1684 || (!shouldBlitOnFixedBackgroundImage && m_style->hasFixedBackgroundImage())); 1685 if (oldStyleSlowScroll != newStyleSlowScroll) { 1686 if (oldStyleSlowScroll) 1687 view()->frameView()->removeSlowRepaintObject(); 1688 if (newStyleSlowScroll) 1689 view()->frameView()->addSlowRepaintObject(); 1690 } 1691 } 1692 } 1693 1694 void RenderObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 1695 { 1696 if (s_affectsParentBlock) 1697 handleDynamicFloatPositionChange(); 1698 1699 if (!m_parent) 1700 return; 1701 1702 if (diff == StyleDifferenceLayout) { 1703 RenderCounter::rendererStyleChanged(this, oldStyle, m_style.get()); 1704 1705 // If the object already needs layout, then setNeedsLayout won't do 1706 // any work. But if the containing block has changed, then we may need 1707 // to mark the new containing blocks for layout. The change that can 1708 // directly affect the containing block of this object is a change to 1709 // the position style. 1710 if (m_needsLayout && oldStyle->position() != m_style->position()) 1711 markContainingBlocksForLayout(); 1712 1713 setNeedsLayoutAndPrefWidthsRecalc(); 1714 } else if (diff == StyleDifferenceLayoutPositionedMovementOnly) 1715 setNeedsPositionedMovementLayout(); 1716 1717 // Don't check for repaint here; we need to wait until the layer has been 1718 // updated by subclasses before we know if we have to repaint (in setStyle()). 1719 } 1720 1721 void RenderObject::updateFillImages(const FillLayer* oldLayers, const FillLayer* newLayers) 1722 { 1723 // Optimize the common case 1724 if (oldLayers && !oldLayers->next() && newLayers && !newLayers->next() && (oldLayers->image() == newLayers->image())) 1725 return; 1726 1727 // Go through the new layers and addClients first, to avoid removing all clients of an image. 1728 for (const FillLayer* currNew = newLayers; currNew; currNew = currNew->next()) { 1729 if (currNew->image()) 1730 currNew->image()->addClient(this); 1731 } 1732 1733 for (const FillLayer* currOld = oldLayers; currOld; currOld = currOld->next()) { 1734 if (currOld->image()) 1735 currOld->image()->removeClient(this); 1736 } 1737 } 1738 1739 void RenderObject::updateImage(StyleImage* oldImage, StyleImage* newImage) 1740 { 1741 if (oldImage != newImage) { 1742 if (oldImage) 1743 oldImage->removeClient(this); 1744 if (newImage) 1745 newImage->addClient(this); 1746 } 1747 } 1748 1749 IntRect RenderObject::viewRect() const 1750 { 1751 return view()->viewRect(); 1752 } 1753 1754 FloatPoint RenderObject::localToAbsolute(FloatPoint localPoint, bool fixed, bool useTransforms) const 1755 { 1756 TransformState transformState(TransformState::ApplyTransformDirection, localPoint); 1757 mapLocalToContainer(0, fixed, useTransforms, transformState); 1758 transformState.flatten(); 1759 1760 return transformState.lastPlanarPoint(); 1761 } 1762 1763 FloatPoint RenderObject::absoluteToLocal(FloatPoint containerPoint, bool fixed, bool useTransforms) const 1764 { 1765 TransformState transformState(TransformState::UnapplyInverseTransformDirection, containerPoint); 1766 mapAbsoluteToLocalPoint(fixed, useTransforms, transformState); 1767 transformState.flatten(); 1768 1769 return transformState.lastPlanarPoint(); 1770 } 1771 1772 void RenderObject::mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed, bool useTransforms, TransformState& transformState) const 1773 { 1774 if (repaintContainer == this) 1775 return; 1776 1777 RenderObject* o = parent(); 1778 if (!o) 1779 return; 1780 1781 if (o->hasOverflowClip()) 1782 transformState.move(-toRenderBox(o)->layer()->scrolledContentOffset()); 1783 1784 o->mapLocalToContainer(repaintContainer, fixed, useTransforms, transformState); 1785 } 1786 1787 void RenderObject::mapAbsoluteToLocalPoint(bool fixed, bool useTransforms, TransformState& transformState) const 1788 { 1789 RenderObject* o = parent(); 1790 if (o) { 1791 o->mapAbsoluteToLocalPoint(fixed, useTransforms, transformState); 1792 if (o->hasOverflowClip()) 1793 transformState.move(toRenderBox(o)->layer()->scrolledContentOffset()); 1794 } 1795 } 1796 1797 bool RenderObject::shouldUseTransformFromContainer(const RenderObject* containerObject) const 1798 { 1799 #if ENABLE(3D_RENDERING) 1800 // hasTransform() indicates whether the object has transform, transform-style or perspective. We just care about transform, 1801 // so check the layer's transform directly. 1802 return (hasLayer() && toRenderBoxModelObject(this)->layer()->transform()) || (containerObject && containerObject->style()->hasPerspective()); 1803 #else 1804 UNUSED_PARAM(containerObject); 1805 return hasTransform(); 1806 #endif 1807 } 1808 1809 void RenderObject::getTransformFromContainer(const RenderObject* containerObject, const IntSize& offsetInContainer, TransformationMatrix& transform) const 1810 { 1811 transform.makeIdentity(); 1812 transform.translate(offsetInContainer.width(), offsetInContainer.height()); 1813 RenderLayer* layer; 1814 if (hasLayer() && (layer = toRenderBoxModelObject(this)->layer()) && layer->transform()) 1815 transform.multLeft(layer->currentTransform()); 1816 1817 #if ENABLE(3D_RENDERING) 1818 if (containerObject && containerObject->hasLayer() && containerObject->style()->hasPerspective()) { 1819 // Perpsective on the container affects us, so we have to factor it in here. 1820 ASSERT(containerObject->hasLayer()); 1821 FloatPoint perspectiveOrigin = toRenderBox(containerObject)->layer()->perspectiveOrigin(); 1822 1823 TransformationMatrix perspectiveMatrix; 1824 perspectiveMatrix.applyPerspective(containerObject->style()->perspective()); 1825 1826 transform.translateRight3d(-perspectiveOrigin.x(), -perspectiveOrigin.y(), 0); 1827 transform.multiply(perspectiveMatrix); 1828 transform.translateRight3d(perspectiveOrigin.x(), perspectiveOrigin.y(), 0); 1829 } 1830 #else 1831 UNUSED_PARAM(containerObject); 1832 #endif 1833 } 1834 1835 FloatQuad RenderObject::localToContainerQuad(const FloatQuad& localQuad, RenderBoxModelObject* repaintContainer, bool fixed) const 1836 { 1837 TransformState transformState(TransformState::ApplyTransformDirection, FloatPoint(), &localQuad); 1838 mapLocalToContainer(repaintContainer, fixed, true, transformState); 1839 transformState.flatten(); 1840 1841 return transformState.lastPlanarQuad(); 1842 } 1843 1844 IntSize RenderObject::offsetFromContainer(RenderObject* o) const 1845 { 1846 ASSERT(o == container()); 1847 1848 IntSize offset; 1849 if (o->hasOverflowClip()) 1850 offset -= toRenderBox(o)->layer()->scrolledContentOffset(); 1851 1852 return offset; 1853 } 1854 1855 IntSize RenderObject::offsetFromAncestorContainer(RenderObject* container) const 1856 { 1857 IntSize offset; 1858 const RenderObject* currContainer = this; 1859 do { 1860 RenderObject* nextContainer = currContainer->container(); 1861 ASSERT(nextContainer); // This means we reached the top without finding container. 1862 if (!nextContainer) 1863 break; 1864 ASSERT(!currContainer->hasTransform()); 1865 offset += currContainer->offsetFromContainer(nextContainer); 1866 currContainer = nextContainer; 1867 } while (currContainer != container); 1868 1869 return offset; 1870 } 1871 1872 IntRect RenderObject::localCaretRect(InlineBox*, int, int* extraWidthToEndOfLine) 1873 { 1874 if (extraWidthToEndOfLine) 1875 *extraWidthToEndOfLine = 0; 1876 1877 return IntRect(); 1878 } 1879 1880 RenderView* RenderObject::view() const 1881 { 1882 return toRenderView(document()->renderer()); 1883 } 1884 1885 bool RenderObject::isRooted(RenderView** view) 1886 { 1887 RenderObject* o = this; 1888 while (o->parent()) 1889 o = o->parent(); 1890 1891 if (!o->isRenderView()) 1892 return false; 1893 1894 if (view) 1895 *view = toRenderView(o); 1896 1897 return true; 1898 } 1899 1900 bool RenderObject::hasOutlineAnnotation() const 1901 { 1902 return node() && node()->isLink() && document()->printing(); 1903 } 1904 1905 RenderObject* RenderObject::container(RenderBoxModelObject* repaintContainer, bool* repaintContainerSkipped) const 1906 { 1907 if (repaintContainerSkipped) 1908 *repaintContainerSkipped = false; 1909 1910 // This method is extremely similar to containingBlock(), but with a few notable 1911 // exceptions. 1912 // (1) It can be used on orphaned subtrees, i.e., it can be called safely even when 1913 // the object is not part of the primary document subtree yet. 1914 // (2) For normal flow elements, it just returns the parent. 1915 // (3) For absolute positioned elements, it will return a relative positioned inline. 1916 // containingBlock() simply skips relpositioned inlines and lets an enclosing block handle 1917 // the layout of the positioned object. This does mean that calcAbsoluteHorizontal and 1918 // calcAbsoluteVertical have to use container(). 1919 RenderObject* o = parent(); 1920 1921 if (isText()) 1922 return o; 1923 1924 EPosition pos = m_style->position(); 1925 if (pos == FixedPosition) { 1926 // container() can be called on an object that is not in the 1927 // tree yet. We don't call view() since it will assert if it 1928 // can't get back to the canvas. Instead we just walk as high up 1929 // as we can. If we're in the tree, we'll get the root. If we 1930 // aren't we'll get the root of our little subtree (most likely 1931 // we'll just return 0). 1932 // FIXME: The definition of view() has changed to not crawl up the render tree. It might 1933 // be safe now to use it. 1934 while (o && o->parent() && !(o->hasTransform() && o->isRenderBlock())) { 1935 if (repaintContainerSkipped && o == repaintContainer) 1936 *repaintContainerSkipped = true; 1937 o = o->parent(); 1938 } 1939 } else if (pos == AbsolutePosition) { 1940 // Same goes here. We technically just want our containing block, but 1941 // we may not have one if we're part of an uninstalled subtree. We'll 1942 // climb as high as we can though. 1943 while (o && o->style()->position() == StaticPosition && !o->isRenderView() && !(o->hasTransform() && o->isRenderBlock())) { 1944 if (repaintContainerSkipped && o == repaintContainer) 1945 *repaintContainerSkipped = true; 1946 o = o->parent(); 1947 } 1948 } 1949 1950 return o; 1951 } 1952 1953 bool RenderObject::isSelectionBorder() const 1954 { 1955 SelectionState st = selectionState(); 1956 return st == SelectionStart || st == SelectionEnd || st == SelectionBoth; 1957 } 1958 1959 void RenderObject::destroy() 1960 { 1961 // Destroy any leftover anonymous children. 1962 RenderObjectChildList* children = virtualChildren(); 1963 if (children) 1964 children->destroyLeftoverChildren(); 1965 1966 // If this renderer is being autoscrolled, stop the autoscroll timer 1967 1968 // FIXME: RenderObject::destroy should not get called with a renderer whose document 1969 // has a null frame, so we assert this. However, we don't want release builds to crash which is why we 1970 // check that the frame is not null. 1971 ASSERT(document()->frame()); 1972 if (document()->frame() && document()->frame()->eventHandler()->autoscrollRenderer() == this) 1973 document()->frame()->eventHandler()->stopAutoscrollTimer(true); 1974 1975 if (m_hasCounterNodeMap) 1976 RenderCounter::destroyCounterNodes(this); 1977 1978 if (AXObjectCache::accessibilityEnabled()) { 1979 document()->axObjectCache()->childrenChanged(this->parent()); 1980 document()->axObjectCache()->remove(this); 1981 } 1982 animation()->cancelAnimations(this); 1983 1984 // By default no ref-counting. RenderWidget::destroy() doesn't call 1985 // this function because it needs to do ref-counting. If anything 1986 // in this function changes, be sure to fix RenderWidget::destroy() as well. 1987 1988 remove(); 1989 1990 // FIXME: Would like to do this in RenderBoxModelObject, but the timing is so complicated that this can't easily 1991 // be moved into RenderBoxModelObject::destroy. 1992 if (hasLayer()) { 1993 setHasLayer(false); 1994 toRenderBoxModelObject(this)->destroyLayer(); 1995 } 1996 arenaDelete(renderArena(), this); 1997 } 1998 1999 void RenderObject::arenaDelete(RenderArena* arena, void* base) 2000 { 2001 if (m_style) { 2002 for (const FillLayer* bgLayer = m_style->backgroundLayers(); bgLayer; bgLayer = bgLayer->next()) { 2003 if (StyleImage* backgroundImage = bgLayer->image()) 2004 backgroundImage->removeClient(this); 2005 } 2006 2007 for (const FillLayer* maskLayer = m_style->maskLayers(); maskLayer; maskLayer = maskLayer->next()) { 2008 if (StyleImage* maskImage = maskLayer->image()) 2009 maskImage->removeClient(this); 2010 } 2011 2012 if (StyleImage* borderImage = m_style->borderImage().image()) 2013 borderImage->removeClient(this); 2014 2015 if (StyleImage* maskBoxImage = m_style->maskBoxImage().image()) 2016 maskBoxImage->removeClient(this); 2017 } 2018 2019 #ifndef NDEBUG 2020 void* savedBase = baseOfRenderObjectBeingDeleted; 2021 baseOfRenderObjectBeingDeleted = base; 2022 #endif 2023 delete this; 2024 #ifndef NDEBUG 2025 baseOfRenderObjectBeingDeleted = savedBase; 2026 #endif 2027 2028 // Recover the size left there for us by operator delete and free the memory. 2029 arena->free(*(size_t*)base, base); 2030 } 2031 2032 VisiblePosition RenderObject::positionForCoordinates(int x, int y) 2033 { 2034 return positionForPoint(IntPoint(x, y)); 2035 } 2036 2037 VisiblePosition RenderObject::positionForPoint(const IntPoint&) 2038 { 2039 return createVisiblePosition(caretMinOffset(), DOWNSTREAM); 2040 } 2041 2042 void RenderObject::updateDragState(bool dragOn) 2043 { 2044 bool valueChanged = (dragOn != m_isDragging); 2045 m_isDragging = dragOn; 2046 if (valueChanged && style()->affectedByDragRules()) 2047 node()->setNeedsStyleRecalc(); 2048 for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling()) 2049 curr->updateDragState(dragOn); 2050 } 2051 2052 bool RenderObject::hitTest(const HitTestRequest& request, HitTestResult& result, const IntPoint& point, int tx, int ty, HitTestFilter hitTestFilter) 2053 { 2054 bool inside = false; 2055 if (hitTestFilter != HitTestSelf) { 2056 // First test the foreground layer (lines and inlines). 2057 inside = nodeAtPoint(request, result, point.x(), point.y(), tx, ty, HitTestForeground); 2058 2059 // Test floats next. 2060 if (!inside) 2061 inside = nodeAtPoint(request, result, point.x(), point.y(), tx, ty, HitTestFloat); 2062 2063 // Finally test to see if the mouse is in the background (within a child block's background). 2064 if (!inside) 2065 inside = nodeAtPoint(request, result, point.x(), point.y(), tx, ty, HitTestChildBlockBackgrounds); 2066 } 2067 2068 // See if the mouse is inside us but not any of our descendants 2069 if (hitTestFilter != HitTestDescendants && !inside) 2070 inside = nodeAtPoint(request, result, point.x(), point.y(), tx, ty, HitTestBlockBackground); 2071 2072 return inside; 2073 } 2074 2075 void RenderObject::updateHitTestResult(HitTestResult& result, const IntPoint& point) 2076 { 2077 if (result.innerNode()) 2078 return; 2079 2080 Node* n = node(); 2081 if (n) { 2082 result.setInnerNode(n); 2083 if (!result.innerNonSharedNode()) 2084 result.setInnerNonSharedNode(n); 2085 result.setLocalPoint(point); 2086 } 2087 } 2088 2089 bool RenderObject::nodeAtPoint(const HitTestRequest&, HitTestResult&, int /*x*/, int /*y*/, int /*tx*/, int /*ty*/, HitTestAction) 2090 { 2091 return false; 2092 } 2093 2094 int RenderObject::lineHeight(bool firstLine, bool /*isRootLineBox*/) const 2095 { 2096 return style(firstLine)->computedLineHeight(); 2097 } 2098 2099 int RenderObject::baselinePosition(bool firstLine, bool isRootLineBox) const 2100 { 2101 const Font& f = style(firstLine)->font(); 2102 return f.ascent() + (lineHeight(firstLine, isRootLineBox) - f.height()) / 2; 2103 } 2104 2105 void RenderObject::scheduleRelayout() 2106 { 2107 if (isRenderView()) { 2108 FrameView* view = toRenderView(this)->frameView(); 2109 if (view) 2110 view->scheduleRelayout(); 2111 } else if (parent()) { 2112 FrameView* v = view() ? view()->frameView() : 0; 2113 if (v) 2114 v->scheduleRelayoutOfSubtree(this); 2115 } 2116 } 2117 2118 void RenderObject::layout() 2119 { 2120 ASSERT(needsLayout()); 2121 RenderObject* child = firstChild(); 2122 while (child) { 2123 child->layoutIfNeeded(); 2124 ASSERT(!child->needsLayout()); 2125 child = child->nextSibling(); 2126 } 2127 setNeedsLayout(false); 2128 } 2129 2130 PassRefPtr<RenderStyle> RenderObject::uncachedFirstLineStyle(RenderStyle* style) const 2131 { 2132 if (!document()->usesFirstLineRules()) 2133 return 0; 2134 2135 ASSERT(!isText()); 2136 2137 RefPtr<RenderStyle> result; 2138 2139 if (isBlockFlow()) { 2140 if (RenderBlock* firstLineBlock = this->firstLineBlock()) 2141 result = firstLineBlock->getUncachedPseudoStyle(FIRST_LINE, style, firstLineBlock == this ? style : 0); 2142 } else if (!isAnonymous() && isRenderInline()) { 2143 RenderStyle* parentStyle = parent()->firstLineStyle(); 2144 if (parentStyle != parent()->style()) 2145 result = getUncachedPseudoStyle(FIRST_LINE_INHERITED, parentStyle, style); 2146 } 2147 2148 return result.release(); 2149 } 2150 2151 RenderStyle* RenderObject::firstLineStyleSlowCase() const 2152 { 2153 ASSERT(document()->usesFirstLineRules()); 2154 2155 RenderStyle* style = m_style.get(); 2156 const RenderObject* renderer = isText() ? parent() : this; 2157 if (renderer->isBlockFlow()) { 2158 if (RenderBlock* firstLineBlock = renderer->firstLineBlock()) 2159 style = firstLineBlock->getCachedPseudoStyle(FIRST_LINE, style); 2160 } else if (!renderer->isAnonymous() && renderer->isRenderInline()) { 2161 RenderStyle* parentStyle = renderer->parent()->firstLineStyle(); 2162 if (parentStyle != renderer->parent()->style()) { 2163 // A first-line style is in effect. Cache a first-line style for ourselves. 2164 style->setHasPseudoStyle(FIRST_LINE_INHERITED); 2165 style = renderer->getCachedPseudoStyle(FIRST_LINE_INHERITED, parentStyle); 2166 } 2167 } 2168 2169 return style; 2170 } 2171 2172 RenderStyle* RenderObject::getCachedPseudoStyle(PseudoId pseudo, RenderStyle* parentStyle) const 2173 { 2174 if (pseudo < FIRST_INTERNAL_PSEUDOID && !style()->hasPseudoStyle(pseudo)) 2175 return 0; 2176 2177 RenderStyle* cachedStyle = style()->getCachedPseudoStyle(pseudo); 2178 if (cachedStyle) 2179 return cachedStyle; 2180 2181 RefPtr<RenderStyle> result = getUncachedPseudoStyle(pseudo, parentStyle); 2182 if (result) 2183 return style()->addCachedPseudoStyle(result.release()); 2184 return 0; 2185 } 2186 2187 PassRefPtr<RenderStyle> RenderObject::getUncachedPseudoStyle(PseudoId pseudo, RenderStyle* parentStyle, RenderStyle* ownStyle) const 2188 { 2189 if (pseudo < FIRST_INTERNAL_PSEUDOID && !ownStyle && !style()->hasPseudoStyle(pseudo)) 2190 return 0; 2191 2192 if (!parentStyle) { 2193 ASSERT(!ownStyle); 2194 parentStyle = style(); 2195 } 2196 2197 Node* n = node(); 2198 while (n && !n->isElementNode()) 2199 n = n->parentNode(); 2200 if (!n) 2201 return 0; 2202 2203 RefPtr<RenderStyle> result; 2204 if (pseudo == FIRST_LINE_INHERITED) { 2205 result = document()->styleSelector()->styleForElement(static_cast<Element*>(n), parentStyle, false); 2206 result->setStyleType(FIRST_LINE_INHERITED); 2207 } else 2208 result = document()->styleSelector()->pseudoStyleForElement(pseudo, static_cast<Element*>(n), parentStyle); 2209 return result.release(); 2210 } 2211 2212 static Color decorationColor(RenderStyle* style) 2213 { 2214 Color result; 2215 if (style->textStrokeWidth() > 0) { 2216 // Prefer stroke color if possible but not if it's fully transparent. 2217 result = style->textStrokeColor(); 2218 if (!result.isValid()) 2219 result = style->color(); 2220 if (result.alpha()) 2221 return result; 2222 } 2223 2224 result = style->textFillColor(); 2225 if (!result.isValid()) 2226 result = style->color(); 2227 return result; 2228 } 2229 2230 void RenderObject::getTextDecorationColors(int decorations, Color& underline, Color& overline, 2231 Color& linethrough, bool quirksMode) 2232 { 2233 RenderObject* curr = this; 2234 do { 2235 int currDecs = curr->style()->textDecoration(); 2236 if (currDecs) { 2237 if (currDecs & UNDERLINE) { 2238 decorations &= ~UNDERLINE; 2239 underline = decorationColor(curr->style()); 2240 } 2241 if (currDecs & OVERLINE) { 2242 decorations &= ~OVERLINE; 2243 overline = decorationColor(curr->style()); 2244 } 2245 if (currDecs & LINE_THROUGH) { 2246 decorations &= ~LINE_THROUGH; 2247 linethrough = decorationColor(curr->style()); 2248 } 2249 } 2250 curr = curr->parent(); 2251 if (curr && curr->isRenderBlock() && toRenderBlock(curr)->inlineContinuation()) 2252 curr = toRenderBlock(curr)->inlineContinuation(); 2253 } while (curr && decorations && (!quirksMode || !curr->node() || 2254 (!curr->node()->hasTagName(aTag) && !curr->node()->hasTagName(fontTag)))); 2255 2256 // If we bailed out, use the element we bailed out at (typically a <font> or <a> element). 2257 if (decorations && curr) { 2258 if (decorations & UNDERLINE) 2259 underline = decorationColor(curr->style()); 2260 if (decorations & OVERLINE) 2261 overline = decorationColor(curr->style()); 2262 if (decorations & LINE_THROUGH) 2263 linethrough = decorationColor(curr->style()); 2264 } 2265 } 2266 2267 #if ENABLE(DASHBOARD_SUPPORT) 2268 void RenderObject::addDashboardRegions(Vector<DashboardRegionValue>& regions) 2269 { 2270 // Convert the style regions to absolute coordinates. 2271 if (style()->visibility() != VISIBLE || !isBox()) 2272 return; 2273 2274 RenderBox* box = toRenderBox(this); 2275 2276 const Vector<StyleDashboardRegion>& styleRegions = style()->dashboardRegions(); 2277 unsigned i, count = styleRegions.size(); 2278 for (i = 0; i < count; i++) { 2279 StyleDashboardRegion styleRegion = styleRegions[i]; 2280 2281 int w = box->width(); 2282 int h = box->height(); 2283 2284 DashboardRegionValue region; 2285 region.label = styleRegion.label; 2286 region.bounds = IntRect(styleRegion.offset.left().value(), 2287 styleRegion.offset.top().value(), 2288 w - styleRegion.offset.left().value() - styleRegion.offset.right().value(), 2289 h - styleRegion.offset.top().value() - styleRegion.offset.bottom().value()); 2290 region.type = styleRegion.type; 2291 2292 region.clip = region.bounds; 2293 computeAbsoluteRepaintRect(region.clip); 2294 if (region.clip.height() < 0) { 2295 region.clip.setHeight(0); 2296 region.clip.setWidth(0); 2297 } 2298 2299 FloatPoint absPos = localToAbsolute(); 2300 region.bounds.setX(absPos.x() + styleRegion.offset.left().value()); 2301 region.bounds.setY(absPos.y() + styleRegion.offset.top().value()); 2302 2303 if (document()->frame()) { 2304 float pageScaleFactor = document()->frame()->page()->chrome()->scaleFactor(); 2305 if (pageScaleFactor != 1.0f) { 2306 region.bounds.scale(pageScaleFactor); 2307 region.clip.scale(pageScaleFactor); 2308 } 2309 } 2310 2311 regions.append(region); 2312 } 2313 } 2314 2315 void RenderObject::collectDashboardRegions(Vector<DashboardRegionValue>& regions) 2316 { 2317 // RenderTexts don't have their own style, they just use their parent's style, 2318 // so we don't want to include them. 2319 if (isText()) 2320 return; 2321 2322 addDashboardRegions(regions); 2323 for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling()) 2324 curr->collectDashboardRegions(regions); 2325 } 2326 #endif 2327 2328 bool RenderObject::willRenderImage(CachedImage*) 2329 { 2330 // Without visibility we won't render (and therefore don't care about animation). 2331 if (style()->visibility() != VISIBLE) 2332 return false; 2333 2334 // If we're not in a window (i.e., we're dormant from being put in the b/f cache or in a background tab) 2335 // then we don't want to render either. 2336 return !document()->inPageCache() && !document()->view()->isOffscreen(); 2337 } 2338 2339 int RenderObject::maximalOutlineSize(PaintPhase p) const 2340 { 2341 if (p != PaintPhaseOutline && p != PaintPhaseSelfOutline && p != PaintPhaseChildOutlines) 2342 return 0; 2343 return toRenderView(document()->renderer())->maximalOutlineSize(); 2344 } 2345 2346 int RenderObject::caretMinOffset() const 2347 { 2348 return 0; 2349 } 2350 2351 int RenderObject::caretMaxOffset() const 2352 { 2353 if (isReplaced()) 2354 return node() ? max(1U, node()->childNodeCount()) : 1; 2355 if (isHR()) 2356 return 1; 2357 return 0; 2358 } 2359 2360 unsigned RenderObject::caretMaxRenderedOffset() const 2361 { 2362 return 0; 2363 } 2364 2365 int RenderObject::previousOffset(int current) const 2366 { 2367 return current - 1; 2368 } 2369 2370 int RenderObject::previousOffsetForBackwardDeletion(int current) const 2371 { 2372 return current - 1; 2373 } 2374 2375 int RenderObject::nextOffset(int current) const 2376 { 2377 return current + 1; 2378 } 2379 2380 void RenderObject::adjustRectForOutlineAndShadow(IntRect& rect) const 2381 { 2382 int outlineSize = outlineStyleForRepaint()->outlineSize(); 2383 if (ShadowData* boxShadow = style()->boxShadow()) { 2384 int shadowLeft = 0; 2385 int shadowRight = 0; 2386 int shadowTop = 0; 2387 int shadowBottom = 0; 2388 2389 do { 2390 if (boxShadow->style == Normal) { 2391 shadowLeft = min(boxShadow->x - boxShadow->blur - boxShadow->spread - outlineSize, shadowLeft); 2392 shadowRight = max(boxShadow->x + boxShadow->blur + boxShadow->spread + outlineSize, shadowRight); 2393 shadowTop = min(boxShadow->y - boxShadow->blur - boxShadow->spread - outlineSize, shadowTop); 2394 shadowBottom = max(boxShadow->y + boxShadow->blur + boxShadow->spread + outlineSize, shadowBottom); 2395 } 2396 2397 boxShadow = boxShadow->next; 2398 } while (boxShadow); 2399 2400 rect.move(shadowLeft, shadowTop); 2401 rect.setWidth(rect.width() - shadowLeft + shadowRight); 2402 rect.setHeight(rect.height() - shadowTop + shadowBottom); 2403 } else 2404 rect.inflate(outlineSize); 2405 } 2406 2407 AnimationController* RenderObject::animation() const 2408 { 2409 return document()->frame()->animation(); 2410 } 2411 2412 void RenderObject::imageChanged(CachedImage* image, const IntRect* rect) 2413 { 2414 imageChanged(static_cast<WrappedImagePtr>(image), rect); 2415 } 2416 2417 RenderBoxModelObject* RenderObject::offsetParent() const 2418 { 2419 // If any of the following holds true return null and stop this algorithm: 2420 // A is the root element. 2421 // A is the HTML body element. 2422 // The computed value of the position property for element A is fixed. 2423 if (isRoot() || isBody() || (isPositioned() && style()->position() == FixedPosition)) 2424 return 0; 2425 2426 // If A is an area HTML element which has a map HTML element somewhere in the ancestor 2427 // chain return the nearest ancestor map HTML element and stop this algorithm. 2428 // FIXME: Implement! 2429 2430 // Return the nearest ancestor element of A for which at least one of the following is 2431 // true and stop this algorithm if such an ancestor is found: 2432 // * The computed value of the position property is not static. 2433 // * It is the HTML body element. 2434 // * The computed value of the position property of A is static and the ancestor 2435 // is one of the following HTML elements: td, th, or table. 2436 // * Our own extension: if there is a difference in the effective zoom 2437 bool skipTables = isPositioned() || isRelPositioned(); 2438 float currZoom = style()->effectiveZoom(); 2439 RenderObject* curr = parent(); 2440 while (curr && (!curr->node() || 2441 (!curr->isPositioned() && !curr->isRelPositioned() && !curr->isBody()))) { 2442 Node* element = curr->node(); 2443 if (!skipTables && element) { 2444 bool isTableElement = element->hasTagName(tableTag) || 2445 element->hasTagName(tdTag) || 2446 element->hasTagName(thTag); 2447 2448 #if ENABLE(WML) 2449 if (!isTableElement && element->isWMLElement()) 2450 isTableElement = element->hasTagName(WMLNames::tableTag) || 2451 element->hasTagName(WMLNames::tdTag); 2452 #endif 2453 2454 if (isTableElement) 2455 break; 2456 } 2457 2458 float newZoom = curr->style()->effectiveZoom(); 2459 if (currZoom != newZoom) 2460 break; 2461 currZoom = newZoom; 2462 curr = curr->parent(); 2463 } 2464 return curr && curr->isBoxModelObject() ? toRenderBoxModelObject(curr) : 0; 2465 } 2466 2467 VisiblePosition RenderObject::createVisiblePosition(int offset, EAffinity affinity) 2468 { 2469 // If this is a non-anonymous renderer in an editable area, then it's simple. 2470 if (Node* node = this->node()) { 2471 if (!node->isContentEditable()) { 2472 // If it can be found, we prefer a visually equivalent position that is editable. 2473 Position position(node, offset); 2474 Position candidate = position.downstream(Position::CanCrossEditingBoundary); 2475 if (candidate.node()->isContentEditable()) 2476 return VisiblePosition(candidate, affinity); 2477 candidate = position.upstream(Position::CanCrossEditingBoundary); 2478 if (candidate.node()->isContentEditable()) 2479 return VisiblePosition(candidate, affinity); 2480 } 2481 return VisiblePosition(node, offset, affinity); 2482 } 2483 2484 // We don't want to cross the boundary between editable and non-editable 2485 // regions of the document, but that is either impossible or at least 2486 // extremely unlikely in any normal case because we stop as soon as we 2487 // find a single non-anonymous renderer. 2488 2489 // Find a nearby non-anonymous renderer. 2490 RenderObject* child = this; 2491 while (RenderObject* parent = child->parent()) { 2492 // Find non-anonymous content after. 2493 RenderObject* renderer = child; 2494 while ((renderer = renderer->nextInPreOrder(parent))) { 2495 if (Node* node = renderer->node()) 2496 return VisiblePosition(node, 0, DOWNSTREAM); 2497 } 2498 2499 // Find non-anonymous content before. 2500 renderer = child; 2501 while ((renderer = renderer->previousInPreOrder())) { 2502 if (renderer == parent) 2503 break; 2504 if (Node* node = renderer->node()) 2505 return VisiblePosition(lastDeepEditingPositionForNode(node), DOWNSTREAM); 2506 } 2507 2508 // Use the parent itself unless it too is anonymous. 2509 if (Node* node = parent->node()) 2510 return VisiblePosition(node, 0, DOWNSTREAM); 2511 2512 // Repeat at the next level up. 2513 child = parent; 2514 } 2515 2516 // Everything was anonymous. Give up. 2517 return VisiblePosition(); 2518 } 2519 2520 VisiblePosition RenderObject::createVisiblePosition(const Position& position) 2521 { 2522 if (position.isNotNull()) 2523 return VisiblePosition(position); 2524 2525 ASSERT(!node()); 2526 return createVisiblePosition(0, DOWNSTREAM); 2527 } 2528 2529 #if ENABLE(SVG) 2530 const SVGRenderBase* RenderObject::toSVGRenderBase() const 2531 { 2532 ASSERT_NOT_REACHED(); 2533 return 0; 2534 } 2535 2536 FloatRect RenderObject::objectBoundingBox() const 2537 { 2538 ASSERT_NOT_REACHED(); 2539 return FloatRect(); 2540 } 2541 2542 // Returns the smallest rectangle enclosing all of the painted content 2543 // respecting clipping, masking, filters, opacity, stroke-width and markers 2544 FloatRect RenderObject::repaintRectInLocalCoordinates() const 2545 { 2546 ASSERT_NOT_REACHED(); 2547 return FloatRect(); 2548 } 2549 2550 AffineTransform RenderObject::localTransform() const 2551 { 2552 static const AffineTransform identity; 2553 return identity; 2554 } 2555 2556 const AffineTransform& RenderObject::localToParentTransform() const 2557 { 2558 static const AffineTransform identity; 2559 return identity; 2560 } 2561 2562 bool RenderObject::nodeAtFloatPoint(const HitTestRequest&, HitTestResult&, const FloatPoint&, HitTestAction) 2563 { 2564 ASSERT_NOT_REACHED(); 2565 return false; 2566 } 2567 2568 #endif // ENABLE(SVG) 2569 2570 } // namespace WebCore 2571 2572 #ifndef NDEBUG 2573 2574 void showTree(const WebCore::RenderObject* ro) 2575 { 2576 if (ro) 2577 ro->showTreeForThis(); 2578 } 2579 2580 void showRenderTree(const WebCore::RenderObject* object1) 2581 { 2582 showRenderTree(object1, 0); 2583 } 2584 2585 void showRenderTree(const WebCore::RenderObject* object1, const WebCore::RenderObject* object2) 2586 { 2587 if (object1) { 2588 const WebCore::RenderObject* root = object1; 2589 while (root->parent()) 2590 root = root->parent(); 2591 root->showRenderTreeAndMark(object1, "*", object2, "-", 0); 2592 } 2593 } 2594 2595 #endif 2596