1 /* 2 * Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #include "config.h" 21 #include "core/rendering/RootInlineBox.h" 22 23 #include "core/dom/Document.h" 24 #include "core/page/Chrome.h" 25 #include "core/page/ChromeClient.h" 26 #include "core/page/Frame.h" 27 #include "core/page/Page.h" 28 #include "core/platform/graphics/GraphicsContext.h" 29 #include "core/platform/text/BidiResolver.h" 30 #include "core/rendering/EllipsisBox.h" 31 #include "core/rendering/HitTestResult.h" 32 #include "core/rendering/InlineTextBox.h" 33 #include "core/rendering/PaintInfo.h" 34 #include "core/rendering/RenderBlock.h" 35 #include "core/rendering/RenderFlowThread.h" 36 #include "core/rendering/RenderView.h" 37 #include "core/rendering/VerticalPositionCache.h" 38 #include "wtf/unicode/Unicode.h" 39 40 using namespace std; 41 42 namespace WebCore { 43 44 struct SameSizeAsRootInlineBox : public InlineFlowBox { 45 unsigned variables[5]; 46 void* pointers[4]; 47 }; 48 49 COMPILE_ASSERT(sizeof(RootInlineBox) == sizeof(SameSizeAsRootInlineBox), RootInlineBox_should_stay_small); 50 51 typedef WTF::HashMap<const RootInlineBox*, EllipsisBox*> EllipsisBoxMap; 52 static EllipsisBoxMap* gEllipsisBoxMap = 0; 53 54 RootInlineBox::RootInlineBox(RenderBlock* block) 55 : InlineFlowBox(block) 56 , m_lineBreakPos(0) 57 , m_lineBreakObj(0) 58 , m_lineTop(0) 59 , m_lineBottom(0) 60 , m_lineTopWithLeading(0) 61 , m_lineBottomWithLeading(0) 62 { 63 setIsHorizontal(block->isHorizontalWritingMode()); 64 } 65 66 67 void RootInlineBox::destroy() 68 { 69 detachEllipsisBox(); 70 InlineFlowBox::destroy(); 71 } 72 73 void RootInlineBox::detachEllipsisBox() 74 { 75 if (hasEllipsisBox()) { 76 EllipsisBox* box = gEllipsisBoxMap->take(this); 77 box->setParent(0); 78 box->destroy(); 79 setHasEllipsisBox(false); 80 } 81 } 82 83 RenderLineBoxList* RootInlineBox::rendererLineBoxes() const 84 { 85 return block()->lineBoxes(); 86 } 87 88 void RootInlineBox::clearTruncation() 89 { 90 if (hasEllipsisBox()) { 91 detachEllipsisBox(); 92 InlineFlowBox::clearTruncation(); 93 } 94 } 95 96 bool RootInlineBox::isHyphenated() const 97 { 98 for (InlineBox* box = firstLeafChild(); box; box = box->nextLeafChild()) { 99 if (box->isInlineTextBox()) { 100 if (toInlineTextBox(box)->hasHyphen()) 101 return true; 102 } 103 } 104 105 return false; 106 } 107 108 int RootInlineBox::baselinePosition(FontBaseline baselineType) const 109 { 110 return boxModelObject()->baselinePosition(baselineType, isFirstLineStyle(), isHorizontal() ? HorizontalLine : VerticalLine, PositionOfInteriorLineBoxes); 111 } 112 113 LayoutUnit RootInlineBox::lineHeight() const 114 { 115 return boxModelObject()->lineHeight(isFirstLineStyle(), isHorizontal() ? HorizontalLine : VerticalLine, PositionOfInteriorLineBoxes); 116 } 117 118 bool RootInlineBox::lineCanAccommodateEllipsis(bool ltr, int blockEdge, int lineBoxEdge, int ellipsisWidth) 119 { 120 // First sanity-check the unoverflowed width of the whole line to see if there is sufficient room. 121 int delta = ltr ? lineBoxEdge - blockEdge : blockEdge - lineBoxEdge; 122 if (logicalWidth() - delta < ellipsisWidth) 123 return false; 124 125 // Next iterate over all the line boxes on the line. If we find a replaced element that intersects 126 // then we refuse to accommodate the ellipsis. Otherwise we're ok. 127 return InlineFlowBox::canAccommodateEllipsis(ltr, blockEdge, ellipsisWidth); 128 } 129 130 float RootInlineBox::placeEllipsis(const AtomicString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, 131 InlineBox* markupBox) 132 { 133 // Create an ellipsis box. 134 EllipsisBox* ellipsisBox = new EllipsisBox(renderer(), ellipsisStr, this, 135 ellipsisWidth - (markupBox ? markupBox->logicalWidth() : 0), logicalHeight(), 136 y(), !prevRootBox(), isHorizontal(), markupBox); 137 138 if (!gEllipsisBoxMap) 139 gEllipsisBoxMap = new EllipsisBoxMap(); 140 gEllipsisBoxMap->add(this, ellipsisBox); 141 setHasEllipsisBox(true); 142 143 // FIXME: Do we need an RTL version of this? 144 if (ltr && (x() + logicalWidth() + ellipsisWidth) <= blockRightEdge) { 145 ellipsisBox->setX(x() + logicalWidth()); 146 return logicalWidth() + ellipsisWidth; 147 } 148 149 // Now attempt to find the nearest glyph horizontally and place just to the right (or left in RTL) 150 // of that glyph. Mark all of the objects that intersect the ellipsis box as not painting (as being 151 // truncated). 152 bool foundBox = false; 153 float truncatedWidth = 0; 154 float position = placeEllipsisBox(ltr, blockLeftEdge, blockRightEdge, ellipsisWidth, truncatedWidth, foundBox); 155 ellipsisBox->setX(position); 156 return truncatedWidth; 157 } 158 159 float RootInlineBox::placeEllipsisBox(bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox) 160 { 161 float result = InlineFlowBox::placeEllipsisBox(ltr, blockLeftEdge, blockRightEdge, ellipsisWidth, truncatedWidth, foundBox); 162 if (result == -1) { 163 result = ltr ? blockRightEdge - ellipsisWidth : blockLeftEdge; 164 truncatedWidth = blockRightEdge - blockLeftEdge; 165 } 166 return result; 167 } 168 169 void RootInlineBox::paintEllipsisBox(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom) const 170 { 171 if (hasEllipsisBox() && paintInfo.shouldPaintWithinRoot(renderer()) && renderer()->style()->visibility() == VISIBLE 172 && paintInfo.phase == PaintPhaseForeground) 173 ellipsisBox()->paint(paintInfo, paintOffset, lineTop, lineBottom); 174 } 175 176 void RootInlineBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom) 177 { 178 InlineFlowBox::paint(paintInfo, paintOffset, lineTop, lineBottom); 179 paintEllipsisBox(paintInfo, paintOffset, lineTop, lineBottom); 180 } 181 182 bool RootInlineBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom) 183 { 184 if (hasEllipsisBox() && visibleToHitTestRequest(request)) { 185 if (ellipsisBox()->nodeAtPoint(request, result, locationInContainer, accumulatedOffset, lineTop, lineBottom)) { 186 renderer()->updateHitTestResult(result, locationInContainer.point() - toLayoutSize(accumulatedOffset)); 187 return true; 188 } 189 } 190 return InlineFlowBox::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, lineTop, lineBottom); 191 } 192 193 void RootInlineBox::adjustPosition(float dx, float dy) 194 { 195 InlineFlowBox::adjustPosition(dx, dy); 196 LayoutUnit blockDirectionDelta = isHorizontal() ? dy : dx; // The block direction delta is a LayoutUnit. 197 m_lineTop += blockDirectionDelta; 198 m_lineBottom += blockDirectionDelta; 199 m_lineTopWithLeading += blockDirectionDelta; 200 m_lineBottomWithLeading += blockDirectionDelta; 201 if (hasEllipsisBox()) 202 ellipsisBox()->adjustPosition(dx, dy); 203 } 204 205 void RootInlineBox::childRemoved(InlineBox* box) 206 { 207 if (box->renderer() == m_lineBreakObj) 208 setLineBreakInfo(0, 0, BidiStatus()); 209 210 for (RootInlineBox* prev = prevRootBox(); prev && prev->lineBreakObj() == box->renderer(); prev = prev->prevRootBox()) { 211 prev->setLineBreakInfo(0, 0, BidiStatus()); 212 prev->markDirty(); 213 } 214 } 215 216 RenderRegion* RootInlineBox::containingRegion() const 217 { 218 RenderRegion* region = m_fragmentationData ? m_fragmentationData->m_containingRegion : 0; 219 220 #ifndef NDEBUG 221 if (region) { 222 RenderFlowThread* flowThread = block()->flowThreadContainingBlock(); 223 const RenderRegionList& regionList = flowThread->renderRegionList(); 224 ASSERT(regionList.contains(region)); 225 } 226 #endif 227 228 return region; 229 } 230 231 void RootInlineBox::setContainingRegion(RenderRegion* region) 232 { 233 ASSERT(!isDirty()); 234 ASSERT(block()->flowThreadContainingBlock()); 235 LineFragmentationData* fragmentationData = ensureLineFragmentationData(); 236 fragmentationData->m_containingRegion = region; 237 } 238 239 LayoutUnit RootInlineBox::alignBoxesInBlockDirection(LayoutUnit heightOfBlock, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache& verticalPositionCache) 240 { 241 // SVG will handle vertical alignment on its own. 242 if (isSVGRootInlineBox()) 243 return 0; 244 245 LayoutUnit maxPositionTop = 0; 246 LayoutUnit maxPositionBottom = 0; 247 int maxAscent = 0; 248 int maxDescent = 0; 249 bool setMaxAscent = false; 250 bool setMaxDescent = false; 251 252 // Figure out if we're in no-quirks mode. 253 bool noQuirksMode = renderer()->document()->inNoQuirksMode(); 254 255 m_baselineType = requiresIdeographicBaseline(textBoxDataMap) ? IdeographicBaseline : AlphabeticBaseline; 256 257 computeLogicalBoxHeights(this, maxPositionTop, maxPositionBottom, maxAscent, maxDescent, setMaxAscent, setMaxDescent, noQuirksMode, 258 textBoxDataMap, baselineType(), verticalPositionCache); 259 260 if (maxAscent + maxDescent < max(maxPositionTop, maxPositionBottom)) 261 adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom); 262 263 LayoutUnit maxHeight = maxAscent + maxDescent; 264 LayoutUnit lineTop = heightOfBlock; 265 LayoutUnit lineBottom = heightOfBlock; 266 LayoutUnit lineTopIncludingMargins = heightOfBlock; 267 LayoutUnit lineBottomIncludingMargins = heightOfBlock; 268 bool setLineTop = false; 269 bool hasAnnotationsBefore = false; 270 bool hasAnnotationsAfter = false; 271 placeBoxesInBlockDirection(heightOfBlock, maxHeight, maxAscent, noQuirksMode, lineTop, lineBottom, setLineTop, 272 lineTopIncludingMargins, lineBottomIncludingMargins, hasAnnotationsBefore, hasAnnotationsAfter, baselineType()); 273 m_hasAnnotationsBefore = hasAnnotationsBefore; 274 m_hasAnnotationsAfter = hasAnnotationsAfter; 275 276 maxHeight = max<LayoutUnit>(0, maxHeight); // FIXME: Is this really necessary? 277 278 setLineTopBottomPositions(lineTop, lineBottom, heightOfBlock, heightOfBlock + maxHeight); 279 setPaginatedLineWidth(block()->availableLogicalWidthForContent(heightOfBlock)); 280 281 LayoutUnit annotationsAdjustment = beforeAnnotationsAdjustment(); 282 if (annotationsAdjustment) { 283 // FIXME: Need to handle pagination here. We might have to move to the next page/column as a result of the 284 // ruby expansion. 285 adjustBlockDirectionPosition(annotationsAdjustment); 286 heightOfBlock += annotationsAdjustment; 287 } 288 289 LayoutUnit gridSnapAdjustment = lineSnapAdjustment(); 290 if (gridSnapAdjustment) { 291 adjustBlockDirectionPosition(gridSnapAdjustment); 292 heightOfBlock += gridSnapAdjustment; 293 } 294 295 return heightOfBlock + maxHeight; 296 } 297 298 #if ENABLE(CSS3_TEXT) 299 float RootInlineBox::maxLogicalTop() const 300 { 301 float maxLogicalTop = 0; 302 computeMaxLogicalTop(maxLogicalTop); 303 return maxLogicalTop; 304 } 305 #endif // CSS3_TEXT 306 307 LayoutUnit RootInlineBox::beforeAnnotationsAdjustment() const 308 { 309 LayoutUnit result = 0; 310 311 if (!renderer()->style()->isFlippedLinesWritingMode()) { 312 // Annotations under the previous line may push us down. 313 if (prevRootBox() && prevRootBox()->hasAnnotationsAfter()) 314 result = prevRootBox()->computeUnderAnnotationAdjustment(lineTop()); 315 316 if (!hasAnnotationsBefore()) 317 return result; 318 319 // Annotations over this line may push us further down. 320 LayoutUnit highestAllowedPosition = prevRootBox() ? min(prevRootBox()->lineBottom(), lineTop()) + result : static_cast<LayoutUnit>(block()->borderBefore()); 321 result = computeOverAnnotationAdjustment(highestAllowedPosition); 322 } else { 323 // Annotations under this line may push us up. 324 if (hasAnnotationsBefore()) 325 result = computeUnderAnnotationAdjustment(prevRootBox() ? prevRootBox()->lineBottom() : static_cast<LayoutUnit>(block()->borderBefore())); 326 327 if (!prevRootBox() || !prevRootBox()->hasAnnotationsAfter()) 328 return result; 329 330 // We have to compute the expansion for annotations over the previous line to see how much we should move. 331 LayoutUnit lowestAllowedPosition = max(prevRootBox()->lineBottom(), lineTop()) - result; 332 result = prevRootBox()->computeOverAnnotationAdjustment(lowestAllowedPosition); 333 } 334 335 return result; 336 } 337 338 LayoutUnit RootInlineBox::lineSnapAdjustment(LayoutUnit delta) const 339 { 340 // If our block doesn't have snapping turned on, do nothing. 341 // FIXME: Implement bounds snapping. 342 if (block()->style()->lineSnap() == LineSnapNone) 343 return 0; 344 345 // Get the current line grid and offset. 346 LayoutState* layoutState = block()->view()->layoutState(); 347 RenderBlock* lineGrid = layoutState->lineGrid(); 348 LayoutSize lineGridOffset = layoutState->lineGridOffset(); 349 if (!lineGrid || lineGrid->style()->writingMode() != block()->style()->writingMode()) 350 return 0; 351 352 // Get the hypothetical line box used to establish the grid. 353 RootInlineBox* lineGridBox = lineGrid->lineGridBox(); 354 if (!lineGridBox) 355 return 0; 356 357 LayoutUnit lineGridBlockOffset = lineGrid->isHorizontalWritingMode() ? lineGridOffset.height() : lineGridOffset.width(); 358 LayoutUnit blockOffset = block()->isHorizontalWritingMode() ? layoutState->layoutOffset().height() : layoutState->layoutOffset().width(); 359 360 // Now determine our position on the grid. Our baseline needs to be adjusted to the nearest baseline multiple 361 // as established by the line box. 362 // FIXME: Need to handle crazy line-box-contain values that cause the root line box to not be considered. I assume 363 // the grid should honor line-box-contain. 364 LayoutUnit gridLineHeight = lineGridBox->lineBottomWithLeading() - lineGridBox->lineTopWithLeading(); 365 if (!gridLineHeight) 366 return 0; 367 368 LayoutUnit lineGridFontAscent = lineGrid->style()->fontMetrics().ascent(baselineType()); 369 LayoutUnit lineGridFontHeight = lineGridBox->logicalHeight(); 370 LayoutUnit firstTextTop = lineGridBlockOffset + lineGridBox->logicalTop(); 371 LayoutUnit firstLineTopWithLeading = lineGridBlockOffset + lineGridBox->lineTopWithLeading(); 372 LayoutUnit firstBaselinePosition = firstTextTop + lineGridFontAscent; 373 374 LayoutUnit currentTextTop = blockOffset + logicalTop() + delta; 375 LayoutUnit currentFontAscent = block()->style()->fontMetrics().ascent(baselineType()); 376 LayoutUnit currentBaselinePosition = currentTextTop + currentFontAscent; 377 378 LayoutUnit lineGridPaginationOrigin = isHorizontal() ? layoutState->lineGridPaginationOrigin().height() : layoutState->lineGridPaginationOrigin().width(); 379 380 // If we're paginated, see if we're on a page after the first one. If so, the grid resets on subsequent pages. 381 // FIXME: If the grid is an ancestor of the pagination establisher, then this is incorrect. 382 LayoutUnit pageLogicalTop = 0; 383 if (layoutState->isPaginated() && layoutState->pageLogicalHeight()) { 384 pageLogicalTop = block()->pageLogicalTopForOffset(lineTopWithLeading() + delta); 385 if (pageLogicalTop > firstLineTopWithLeading) 386 firstTextTop = pageLogicalTop + lineGridBox->logicalTop() - lineGrid->borderBefore() - lineGrid->paddingBefore() + lineGridPaginationOrigin; 387 } 388 389 if (block()->style()->lineSnap() == LineSnapContain) { 390 // Compute the desired offset from the text-top of a grid line. 391 // Look at our height (logicalHeight()). 392 // Look at the total available height. It's going to be (textBottom - textTop) + (n-1)*(multiple with leading) 393 // where n is number of grid lines required to enclose us. 394 if (logicalHeight() <= lineGridFontHeight) 395 firstTextTop += (lineGridFontHeight - logicalHeight()) / 2; 396 else { 397 LayoutUnit numberOfLinesWithLeading = ceilf(static_cast<float>(logicalHeight() - lineGridFontHeight) / gridLineHeight); 398 LayoutUnit totalHeight = lineGridFontHeight + numberOfLinesWithLeading * gridLineHeight; 399 firstTextTop += (totalHeight - logicalHeight()) / 2; 400 } 401 firstBaselinePosition = firstTextTop + currentFontAscent; 402 } else 403 firstBaselinePosition = firstTextTop + lineGridFontAscent; 404 405 // If we're above the first line, just push to the first line. 406 if (currentBaselinePosition < firstBaselinePosition) 407 return delta + firstBaselinePosition - currentBaselinePosition; 408 409 // Otherwise we're in the middle of the grid somewhere. Just push to the next line. 410 LayoutUnit baselineOffset = currentBaselinePosition - firstBaselinePosition; 411 LayoutUnit remainder = roundToInt(baselineOffset) % roundToInt(gridLineHeight); 412 LayoutUnit result = delta; 413 if (remainder) 414 result += gridLineHeight - remainder; 415 416 // If we aren't paginated we can return the result. 417 if (!layoutState->isPaginated() || !layoutState->pageLogicalHeight() || result == delta) 418 return result; 419 420 // We may end up shifted to a new page. We need to do a re-snap when that happens. 421 LayoutUnit newPageLogicalTop = block()->pageLogicalTopForOffset(lineBottomWithLeading() + result); 422 if (newPageLogicalTop == pageLogicalTop) 423 return result; 424 425 // Put ourselves at the top of the next page to force a snap onto the new grid established by that page. 426 return lineSnapAdjustment(newPageLogicalTop - (blockOffset + lineTopWithLeading())); 427 } 428 429 GapRects RootInlineBox::lineSelectionGap(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, 430 LayoutUnit selTop, LayoutUnit selHeight, const PaintInfo* paintInfo) 431 { 432 RenderObject::SelectionState lineState = selectionState(); 433 434 bool leftGap, rightGap; 435 block()->getSelectionGapInfo(lineState, leftGap, rightGap); 436 437 GapRects result; 438 439 InlineBox* firstBox = firstSelectedBox(); 440 InlineBox* lastBox = lastSelectedBox(); 441 if (leftGap) 442 result.uniteLeft(block()->logicalLeftSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, 443 firstBox->parent()->renderer(), firstBox->logicalLeft(), selTop, selHeight, paintInfo)); 444 if (rightGap) 445 result.uniteRight(block()->logicalRightSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, 446 lastBox->parent()->renderer(), lastBox->logicalRight(), selTop, selHeight, paintInfo)); 447 448 // When dealing with bidi text, a non-contiguous selection region is possible. 449 // e.g. The logical text aaaAAAbbb (capitals denote RTL text and non-capitals LTR) is layed out 450 // visually as 3 text runs |aaa|bbb|AAA| if we select 4 characters from the start of the text the 451 // selection will look like (underline denotes selection): 452 // |aaa|bbb|AAA| 453 // ___ _ 454 // We can see that the |bbb| run is not part of the selection while the runs around it are. 455 if (firstBox && firstBox != lastBox) { 456 // Now fill in any gaps on the line that occurred between two selected elements. 457 LayoutUnit lastLogicalLeft = firstBox->logicalRight(); 458 bool isPreviousBoxSelected = firstBox->selectionState() != RenderObject::SelectionNone; 459 for (InlineBox* box = firstBox->nextLeafChild(); box; box = box->nextLeafChild()) { 460 if (box->selectionState() != RenderObject::SelectionNone) { 461 LayoutRect logicalRect(lastLogicalLeft, selTop, box->logicalLeft() - lastLogicalLeft, selHeight); 462 logicalRect.move(renderer()->isHorizontalWritingMode() ? offsetFromRootBlock : LayoutSize(offsetFromRootBlock.height(), offsetFromRootBlock.width())); 463 LayoutRect gapRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, logicalRect); 464 if (isPreviousBoxSelected && gapRect.width() > 0 && gapRect.height() > 0) { 465 if (paintInfo && box->parent()->renderer()->style()->visibility() == VISIBLE) 466 paintInfo->context->fillRect(gapRect, box->parent()->renderer()->selectionBackgroundColor()); 467 // VisibleSelection may be non-contiguous, see comment above. 468 result.uniteCenter(gapRect); 469 } 470 lastLogicalLeft = box->logicalRight(); 471 } 472 if (box == lastBox) 473 break; 474 isPreviousBoxSelected = box->selectionState() != RenderObject::SelectionNone; 475 } 476 } 477 478 return result; 479 } 480 481 RenderObject::SelectionState RootInlineBox::selectionState() 482 { 483 // Walk over all of the selected boxes. 484 RenderObject::SelectionState state = RenderObject::SelectionNone; 485 for (InlineBox* box = firstLeafChild(); box; box = box->nextLeafChild()) { 486 RenderObject::SelectionState boxState = box->selectionState(); 487 if ((boxState == RenderObject::SelectionStart && state == RenderObject::SelectionEnd) || 488 (boxState == RenderObject::SelectionEnd && state == RenderObject::SelectionStart)) 489 state = RenderObject::SelectionBoth; 490 else if (state == RenderObject::SelectionNone || 491 ((boxState == RenderObject::SelectionStart || boxState == RenderObject::SelectionEnd) && 492 (state == RenderObject::SelectionNone || state == RenderObject::SelectionInside))) 493 state = boxState; 494 else if (boxState == RenderObject::SelectionNone && state == RenderObject::SelectionStart) { 495 // We are past the end of the selection. 496 state = RenderObject::SelectionBoth; 497 } 498 if (state == RenderObject::SelectionBoth) 499 break; 500 } 501 502 return state; 503 } 504 505 InlineBox* RootInlineBox::firstSelectedBox() 506 { 507 for (InlineBox* box = firstLeafChild(); box; box = box->nextLeafChild()) { 508 if (box->selectionState() != RenderObject::SelectionNone) 509 return box; 510 } 511 512 return 0; 513 } 514 515 InlineBox* RootInlineBox::lastSelectedBox() 516 { 517 for (InlineBox* box = lastLeafChild(); box; box = box->prevLeafChild()) { 518 if (box->selectionState() != RenderObject::SelectionNone) 519 return box; 520 } 521 522 return 0; 523 } 524 525 LayoutUnit RootInlineBox::selectionTop() const 526 { 527 LayoutUnit selectionTop = m_lineTop; 528 529 if (m_hasAnnotationsBefore) 530 selectionTop -= !renderer()->style()->isFlippedLinesWritingMode() ? computeOverAnnotationAdjustment(m_lineTop) : computeUnderAnnotationAdjustment(m_lineTop); 531 532 if (renderer()->style()->isFlippedLinesWritingMode()) 533 return selectionTop; 534 535 LayoutUnit prevBottom = prevRootBox() ? prevRootBox()->selectionBottom() : block()->borderBefore() + block()->paddingBefore(); 536 if (prevBottom < selectionTop && block()->containsFloats()) { 537 // This line has actually been moved further down, probably from a large line-height, but possibly because the 538 // line was forced to clear floats. If so, let's check the offsets, and only be willing to use the previous 539 // line's bottom if the offsets are greater on both sides. 540 LayoutUnit prevLeft = block()->logicalLeftOffsetForLine(prevBottom, false); 541 LayoutUnit prevRight = block()->logicalRightOffsetForLine(prevBottom, false); 542 LayoutUnit newLeft = block()->logicalLeftOffsetForLine(selectionTop, false); 543 LayoutUnit newRight = block()->logicalRightOffsetForLine(selectionTop, false); 544 if (prevLeft > newLeft || prevRight < newRight) 545 return selectionTop; 546 } 547 548 return prevBottom; 549 } 550 551 LayoutUnit RootInlineBox::selectionTopAdjustedForPrecedingBlock() const 552 { 553 LayoutUnit top = selectionTop(); 554 555 RenderObject::SelectionState blockSelectionState = root()->block()->selectionState(); 556 if (blockSelectionState != RenderObject::SelectionInside && blockSelectionState != RenderObject::SelectionEnd) 557 return top; 558 559 LayoutSize offsetToBlockBefore; 560 if (RenderBlock* block = root()->block()->blockBeforeWithinSelectionRoot(offsetToBlockBefore)) { 561 if (RootInlineBox* lastLine = block->lastRootBox()) { 562 RenderObject::SelectionState lastLineSelectionState = lastLine->selectionState(); 563 if (lastLineSelectionState != RenderObject::SelectionInside && lastLineSelectionState != RenderObject::SelectionStart) 564 return top; 565 566 LayoutUnit lastLineSelectionBottom = lastLine->selectionBottom() + offsetToBlockBefore.height(); 567 top = max(top, lastLineSelectionBottom); 568 } 569 } 570 571 return top; 572 } 573 574 LayoutUnit RootInlineBox::selectionBottom() const 575 { 576 LayoutUnit selectionBottom = m_lineBottom; 577 578 if (m_hasAnnotationsAfter) 579 selectionBottom += !renderer()->style()->isFlippedLinesWritingMode() ? computeUnderAnnotationAdjustment(m_lineBottom) : computeOverAnnotationAdjustment(m_lineBottom); 580 581 if (!renderer()->style()->isFlippedLinesWritingMode() || !nextRootBox()) 582 return selectionBottom; 583 584 LayoutUnit nextTop = nextRootBox()->selectionTop(); 585 if (nextTop > selectionBottom && block()->containsFloats()) { 586 // The next line has actually been moved further over, probably from a large line-height, but possibly because the 587 // line was forced to clear floats. If so, let's check the offsets, and only be willing to use the next 588 // line's top if the offsets are greater on both sides. 589 LayoutUnit nextLeft = block()->logicalLeftOffsetForLine(nextTop, false); 590 LayoutUnit nextRight = block()->logicalRightOffsetForLine(nextTop, false); 591 LayoutUnit newLeft = block()->logicalLeftOffsetForLine(selectionBottom, false); 592 LayoutUnit newRight = block()->logicalRightOffsetForLine(selectionBottom, false); 593 if (nextLeft > newLeft || nextRight < newRight) 594 return selectionBottom; 595 } 596 597 return nextTop; 598 } 599 600 int RootInlineBox::blockDirectionPointInLine() const 601 { 602 return !block()->style()->isFlippedBlocksWritingMode() ? max(lineTop(), selectionTop()) : min(lineBottom(), selectionBottom()); 603 } 604 605 RenderBlock* RootInlineBox::block() const 606 { 607 return toRenderBlock(renderer()); 608 } 609 610 static bool isEditableLeaf(InlineBox* leaf) 611 { 612 return leaf && leaf->renderer() && leaf->renderer()->node() && leaf->renderer()->node()->rendererIsEditable(); 613 } 614 615 InlineBox* RootInlineBox::closestLeafChildForPoint(const IntPoint& pointInContents, bool onlyEditableLeaves) 616 { 617 return closestLeafChildForLogicalLeftPosition(block()->isHorizontalWritingMode() ? pointInContents.x() : pointInContents.y(), onlyEditableLeaves); 618 } 619 620 InlineBox* RootInlineBox::closestLeafChildForLogicalLeftPosition(int leftPosition, bool onlyEditableLeaves) 621 { 622 InlineBox* firstLeaf = firstLeafChild(); 623 InlineBox* lastLeaf = lastLeafChild(); 624 625 if (firstLeaf != lastLeaf) { 626 if (firstLeaf->isLineBreak()) 627 firstLeaf = firstLeaf->nextLeafChildIgnoringLineBreak(); 628 else if (lastLeaf->isLineBreak()) 629 lastLeaf = lastLeaf->prevLeafChildIgnoringLineBreak(); 630 } 631 632 if (firstLeaf == lastLeaf && (!onlyEditableLeaves || isEditableLeaf(firstLeaf))) 633 return firstLeaf; 634 635 // Avoid returning a list marker when possible. 636 if (leftPosition <= firstLeaf->logicalLeft() && !firstLeaf->renderer()->isListMarker() && (!onlyEditableLeaves || isEditableLeaf(firstLeaf))) 637 // The leftPosition coordinate is less or equal to left edge of the firstLeaf. 638 // Return it. 639 return firstLeaf; 640 641 if (leftPosition >= lastLeaf->logicalRight() && !lastLeaf->renderer()->isListMarker() && (!onlyEditableLeaves || isEditableLeaf(lastLeaf))) 642 // The leftPosition coordinate is greater or equal to right edge of the lastLeaf. 643 // Return it. 644 return lastLeaf; 645 646 InlineBox* closestLeaf = 0; 647 for (InlineBox* leaf = firstLeaf; leaf; leaf = leaf->nextLeafChildIgnoringLineBreak()) { 648 if (!leaf->renderer()->isListMarker() && (!onlyEditableLeaves || isEditableLeaf(leaf))) { 649 closestLeaf = leaf; 650 if (leftPosition < leaf->logicalRight()) 651 // The x coordinate is less than the right edge of the box. 652 // Return it. 653 return leaf; 654 } 655 } 656 657 return closestLeaf ? closestLeaf : lastLeaf; 658 } 659 660 BidiStatus RootInlineBox::lineBreakBidiStatus() const 661 { 662 return BidiStatus(static_cast<WTF::Unicode::Direction>(m_lineBreakBidiStatusEor), static_cast<WTF::Unicode::Direction>(m_lineBreakBidiStatusLastStrong), static_cast<WTF::Unicode::Direction>(m_lineBreakBidiStatusLast), m_lineBreakContext); 663 } 664 665 void RootInlineBox::setLineBreakInfo(RenderObject* obj, unsigned breakPos, const BidiStatus& status) 666 { 667 m_lineBreakObj = obj; 668 m_lineBreakPos = breakPos; 669 m_lineBreakBidiStatusEor = status.eor; 670 m_lineBreakBidiStatusLastStrong = status.lastStrong; 671 m_lineBreakBidiStatusLast = status.last; 672 m_lineBreakContext = status.context; 673 } 674 675 EllipsisBox* RootInlineBox::ellipsisBox() const 676 { 677 if (!hasEllipsisBox()) 678 return 0; 679 return gEllipsisBoxMap->get(this); 680 } 681 682 void RootInlineBox::removeLineBoxFromRenderObject() 683 { 684 block()->lineBoxes()->removeLineBox(this); 685 } 686 687 void RootInlineBox::extractLineBoxFromRenderObject() 688 { 689 block()->lineBoxes()->extractLineBox(this); 690 } 691 692 void RootInlineBox::attachLineBoxToRenderObject() 693 { 694 block()->lineBoxes()->attachLineBox(this); 695 } 696 697 LayoutRect RootInlineBox::paddedLayoutOverflowRect(LayoutUnit endPadding) const 698 { 699 LayoutRect lineLayoutOverflow = layoutOverflowRect(lineTop(), lineBottom()); 700 if (!endPadding) 701 return lineLayoutOverflow; 702 703 // FIXME: Audit whether to use pixel snapped values when not using integers for layout: https://bugs.webkit.org/show_bug.cgi?id=63656 704 if (isHorizontal()) { 705 if (isLeftToRightDirection()) 706 lineLayoutOverflow.shiftMaxXEdgeTo(max<LayoutUnit>(lineLayoutOverflow.maxX(), pixelSnappedLogicalRight() + endPadding)); 707 else 708 lineLayoutOverflow.shiftXEdgeTo(min<LayoutUnit>(lineLayoutOverflow.x(), pixelSnappedLogicalLeft() - endPadding)); 709 } else { 710 if (isLeftToRightDirection()) 711 lineLayoutOverflow.shiftMaxYEdgeTo(max<LayoutUnit>(lineLayoutOverflow.maxY(), pixelSnappedLogicalRight() + endPadding)); 712 else 713 lineLayoutOverflow.shiftYEdgeTo(min<LayoutUnit>(lineLayoutOverflow.y(), pixelSnappedLogicalLeft() - endPadding)); 714 } 715 716 return lineLayoutOverflow; 717 } 718 719 static void setAscentAndDescent(int& ascent, int& descent, int newAscent, int newDescent, bool& ascentDescentSet) 720 { 721 if (!ascentDescentSet) { 722 ascentDescentSet = true; 723 ascent = newAscent; 724 descent = newDescent; 725 } else { 726 ascent = max(ascent, newAscent); 727 descent = max(descent, newDescent); 728 } 729 } 730 731 void RootInlineBox::ascentAndDescentForBox(InlineBox* box, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, int& ascent, int& descent, 732 bool& affectsAscent, bool& affectsDescent) const 733 { 734 bool ascentDescentSet = false; 735 736 // Replaced boxes will return 0 for the line-height if line-box-contain says they are 737 // not to be included. 738 if (box->renderer()->isReplaced()) { 739 if (renderer()->style(isFirstLineStyle())->lineBoxContain() & LineBoxContainReplaced) { 740 ascent = box->baselinePosition(baselineType()); 741 descent = box->lineHeight() - ascent; 742 743 // Replaced elements always affect both the ascent and descent. 744 affectsAscent = true; 745 affectsDescent = true; 746 } 747 return; 748 } 749 750 Vector<const SimpleFontData*>* usedFonts = 0; 751 GlyphOverflow* glyphOverflow = 0; 752 if (box->isText()) { 753 GlyphOverflowAndFallbackFontsMap::iterator it = textBoxDataMap.find(toInlineTextBox(box)); 754 usedFonts = it == textBoxDataMap.end() ? 0 : &it->value.first; 755 glyphOverflow = it == textBoxDataMap.end() ? 0 : &it->value.second; 756 } 757 758 bool includeLeading = includeLeadingForBox(box); 759 bool includeFont = includeFontForBox(box); 760 761 bool setUsedFont = false; 762 bool setUsedFontWithLeading = false; 763 764 if (usedFonts && !usedFonts->isEmpty() && (includeFont || (box->renderer()->style(isFirstLineStyle())->lineHeight().isNegative() && includeLeading))) { 765 usedFonts->append(box->renderer()->style(isFirstLineStyle())->font().primaryFont()); 766 for (size_t i = 0; i < usedFonts->size(); ++i) { 767 const FontMetrics& fontMetrics = usedFonts->at(i)->fontMetrics(); 768 int usedFontAscent = fontMetrics.ascent(baselineType()); 769 int usedFontDescent = fontMetrics.descent(baselineType()); 770 int halfLeading = (fontMetrics.lineSpacing() - fontMetrics.height()) / 2; 771 int usedFontAscentAndLeading = usedFontAscent + halfLeading; 772 int usedFontDescentAndLeading = fontMetrics.lineSpacing() - usedFontAscentAndLeading; 773 if (includeFont) { 774 setAscentAndDescent(ascent, descent, usedFontAscent, usedFontDescent, ascentDescentSet); 775 setUsedFont = true; 776 } 777 if (includeLeading) { 778 setAscentAndDescent(ascent, descent, usedFontAscentAndLeading, usedFontDescentAndLeading, ascentDescentSet); 779 setUsedFontWithLeading = true; 780 } 781 if (!affectsAscent) 782 affectsAscent = usedFontAscent - box->logicalTop() > 0; 783 if (!affectsDescent) 784 affectsDescent = usedFontDescent + box->logicalTop() > 0; 785 } 786 } 787 788 // If leading is included for the box, then we compute that box. 789 if (includeLeading && !setUsedFontWithLeading) { 790 int ascentWithLeading = box->baselinePosition(baselineType()); 791 int descentWithLeading = box->lineHeight() - ascentWithLeading; 792 setAscentAndDescent(ascent, descent, ascentWithLeading, descentWithLeading, ascentDescentSet); 793 794 // Examine the font box for inline flows and text boxes to see if any part of it is above the baseline. 795 // If the top of our font box relative to the root box baseline is above the root box baseline, then 796 // we are contributing to the maxAscent value. Descent is similar. If any part of our font box is below 797 // the root box's baseline, then we contribute to the maxDescent value. 798 affectsAscent = ascentWithLeading - box->logicalTop() > 0; 799 affectsDescent = descentWithLeading + box->logicalTop() > 0; 800 } 801 802 if (includeFontForBox(box) && !setUsedFont) { 803 int fontAscent = box->renderer()->style(isFirstLineStyle())->fontMetrics().ascent(baselineType()); 804 int fontDescent = box->renderer()->style(isFirstLineStyle())->fontMetrics().descent(baselineType()); 805 setAscentAndDescent(ascent, descent, fontAscent, fontDescent, ascentDescentSet); 806 affectsAscent = fontAscent - box->logicalTop() > 0; 807 affectsDescent = fontDescent + box->logicalTop() > 0; 808 } 809 810 if (includeGlyphsForBox(box) && glyphOverflow && glyphOverflow->computeBounds) { 811 setAscentAndDescent(ascent, descent, glyphOverflow->top, glyphOverflow->bottom, ascentDescentSet); 812 affectsAscent = glyphOverflow->top - box->logicalTop() > 0; 813 affectsDescent = glyphOverflow->bottom + box->logicalTop() > 0; 814 glyphOverflow->top = min(glyphOverflow->top, max(0, glyphOverflow->top - box->renderer()->style(isFirstLineStyle())->fontMetrics().ascent(baselineType()))); 815 glyphOverflow->bottom = min(glyphOverflow->bottom, max(0, glyphOverflow->bottom - box->renderer()->style(isFirstLineStyle())->fontMetrics().descent(baselineType()))); 816 } 817 818 if (includeMarginForBox(box)) { 819 LayoutUnit ascentWithMargin = box->renderer()->style(isFirstLineStyle())->fontMetrics().ascent(baselineType()); 820 LayoutUnit descentWithMargin = box->renderer()->style(isFirstLineStyle())->fontMetrics().descent(baselineType()); 821 if (box->parent() && !box->renderer()->isText()) { 822 ascentWithMargin += box->boxModelObject()->borderBefore() + box->boxModelObject()->paddingBefore() + box->boxModelObject()->marginBefore(); 823 descentWithMargin += box->boxModelObject()->borderAfter() + box->boxModelObject()->paddingAfter() + box->boxModelObject()->marginAfter(); 824 } 825 setAscentAndDescent(ascent, descent, ascentWithMargin, descentWithMargin, ascentDescentSet); 826 827 // Treat like a replaced element, since we're using the margin box. 828 affectsAscent = true; 829 affectsDescent = true; 830 } 831 } 832 833 LayoutUnit RootInlineBox::verticalPositionForBox(InlineBox* box, VerticalPositionCache& verticalPositionCache) 834 { 835 if (box->renderer()->isText()) 836 return box->parent()->logicalTop(); 837 838 RenderBoxModelObject* renderer = box->boxModelObject(); 839 ASSERT(renderer->isInline()); 840 if (!renderer->isInline()) 841 return 0; 842 843 // This method determines the vertical position for inline elements. 844 bool firstLine = isFirstLineStyle(); 845 if (firstLine && !renderer->document()->styleSheetCollection()->usesFirstLineRules()) 846 firstLine = false; 847 848 // Check the cache. 849 bool isRenderInline = renderer->isRenderInline(); 850 if (isRenderInline && !firstLine) { 851 LayoutUnit verticalPosition = verticalPositionCache.get(renderer, baselineType()); 852 if (verticalPosition != PositionUndefined) 853 return verticalPosition; 854 } 855 856 LayoutUnit verticalPosition = 0; 857 EVerticalAlign verticalAlign = renderer->style()->verticalAlign(); 858 if (verticalAlign == TOP || verticalAlign == BOTTOM) 859 return 0; 860 861 RenderObject* parent = renderer->parent(); 862 if (parent->isRenderInline() && parent->style()->verticalAlign() != TOP && parent->style()->verticalAlign() != BOTTOM) 863 verticalPosition = box->parent()->logicalTop(); 864 865 if (verticalAlign != BASELINE) { 866 const Font& font = parent->style(firstLine)->font(); 867 const FontMetrics& fontMetrics = font.fontMetrics(); 868 int fontSize = font.pixelSize(); 869 870 LineDirectionMode lineDirection = parent->isHorizontalWritingMode() ? HorizontalLine : VerticalLine; 871 872 if (verticalAlign == SUB) 873 verticalPosition += fontSize / 5 + 1; 874 else if (verticalAlign == SUPER) 875 verticalPosition -= fontSize / 3 + 1; 876 else if (verticalAlign == TEXT_TOP) 877 verticalPosition += renderer->baselinePosition(baselineType(), firstLine, lineDirection) - fontMetrics.ascent(baselineType()); 878 else if (verticalAlign == MIDDLE) 879 verticalPosition = (verticalPosition - static_cast<LayoutUnit>(fontMetrics.xHeight() / 2) - renderer->lineHeight(firstLine, lineDirection) / 2 + renderer->baselinePosition(baselineType(), firstLine, lineDirection)).round(); 880 else if (verticalAlign == TEXT_BOTTOM) { 881 verticalPosition += fontMetrics.descent(baselineType()); 882 // lineHeight - baselinePosition is always 0 for replaced elements (except inline blocks), so don't bother wasting time in that case. 883 if (!renderer->isReplaced() || renderer->isInlineBlockOrInlineTable()) 884 verticalPosition -= (renderer->lineHeight(firstLine, lineDirection) - renderer->baselinePosition(baselineType(), firstLine, lineDirection)); 885 } else if (verticalAlign == BASELINE_MIDDLE) 886 verticalPosition += -renderer->lineHeight(firstLine, lineDirection) / 2 + renderer->baselinePosition(baselineType(), firstLine, lineDirection); 887 else if (verticalAlign == LENGTH) { 888 LayoutUnit lineHeight; 889 //Per http://www.w3.org/TR/CSS21/visudet.html#propdef-vertical-align: 'Percentages: refer to the 'line-height' of the element itself'. 890 if (renderer->style()->verticalAlignLength().isPercent()) 891 lineHeight = renderer->style()->computedLineHeight(); 892 else 893 lineHeight = renderer->lineHeight(firstLine, lineDirection); 894 verticalPosition -= valueForLength(renderer->style()->verticalAlignLength(), lineHeight, renderer->view()); 895 } 896 } 897 898 // Store the cached value. 899 if (isRenderInline && !firstLine) 900 verticalPositionCache.set(renderer, baselineType(), verticalPosition); 901 902 return verticalPosition; 903 } 904 905 bool RootInlineBox::includeLeadingForBox(InlineBox* box) const 906 { 907 if (box->renderer()->isReplaced() || (box->renderer()->isText() && !box->isText())) 908 return false; 909 910 LineBoxContain lineBoxContain = renderer()->style()->lineBoxContain(); 911 return (lineBoxContain & LineBoxContainInline) || (box == this && (lineBoxContain & LineBoxContainBlock)); 912 } 913 914 bool RootInlineBox::includeFontForBox(InlineBox* box) const 915 { 916 if (box->renderer()->isReplaced() || (box->renderer()->isText() && !box->isText())) 917 return false; 918 919 if (!box->isText() && box->isInlineFlowBox() && !toInlineFlowBox(box)->hasTextChildren()) 920 return false; 921 922 // For now map "glyphs" to "font" in vertical text mode until the bounds returned by glyphs aren't garbage. 923 LineBoxContain lineBoxContain = renderer()->style()->lineBoxContain(); 924 return (lineBoxContain & LineBoxContainFont) || (!isHorizontal() && (lineBoxContain & LineBoxContainGlyphs)); 925 } 926 927 bool RootInlineBox::includeGlyphsForBox(InlineBox* box) const 928 { 929 if (box->renderer()->isReplaced() || (box->renderer()->isText() && !box->isText())) 930 return false; 931 932 if (!box->isText() && box->isInlineFlowBox() && !toInlineFlowBox(box)->hasTextChildren()) 933 return false; 934 935 // FIXME: We can't fit to glyphs yet for vertical text, since the bounds returned are garbage. 936 LineBoxContain lineBoxContain = renderer()->style()->lineBoxContain(); 937 return isHorizontal() && (lineBoxContain & LineBoxContainGlyphs); 938 } 939 940 bool RootInlineBox::includeMarginForBox(InlineBox* box) const 941 { 942 if (box->renderer()->isReplaced() || (box->renderer()->isText() && !box->isText())) 943 return false; 944 945 LineBoxContain lineBoxContain = renderer()->style()->lineBoxContain(); 946 return lineBoxContain & LineBoxContainInlineBox; 947 } 948 949 950 bool RootInlineBox::fitsToGlyphs() const 951 { 952 // FIXME: We can't fit to glyphs yet for vertical text, since the bounds returned are garbage. 953 LineBoxContain lineBoxContain = renderer()->style()->lineBoxContain(); 954 return isHorizontal() && (lineBoxContain & LineBoxContainGlyphs); 955 } 956 957 bool RootInlineBox::includesRootLineBoxFontOrLeading() const 958 { 959 LineBoxContain lineBoxContain = renderer()->style()->lineBoxContain(); 960 return (lineBoxContain & LineBoxContainBlock) || (lineBoxContain & LineBoxContainInline) || (lineBoxContain & LineBoxContainFont); 961 } 962 963 Node* RootInlineBox::getLogicalStartBoxWithNode(InlineBox*& startBox) const 964 { 965 Vector<InlineBox*> leafBoxesInLogicalOrder; 966 collectLeafBoxesInLogicalOrder(leafBoxesInLogicalOrder); 967 for (size_t i = 0; i < leafBoxesInLogicalOrder.size(); ++i) { 968 if (leafBoxesInLogicalOrder[i]->renderer()->node()) { 969 startBox = leafBoxesInLogicalOrder[i]; 970 return startBox->renderer()->node(); 971 } 972 } 973 startBox = 0; 974 return 0; 975 } 976 977 Node* RootInlineBox::getLogicalEndBoxWithNode(InlineBox*& endBox) const 978 { 979 Vector<InlineBox*> leafBoxesInLogicalOrder; 980 collectLeafBoxesInLogicalOrder(leafBoxesInLogicalOrder); 981 for (size_t i = leafBoxesInLogicalOrder.size(); i > 0; --i) { 982 if (leafBoxesInLogicalOrder[i - 1]->renderer()->node()) { 983 endBox = leafBoxesInLogicalOrder[i - 1]; 984 return endBox->renderer()->node(); 985 } 986 } 987 endBox = 0; 988 return 0; 989 } 990 991 #ifndef NDEBUG 992 const char* RootInlineBox::boxName() const 993 { 994 return "RootInlineBox"; 995 } 996 #endif 997 998 } // namespace WebCore 999
