1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * Copyright (C) 2000 Dirk Mueller (mueller (at) kde.org) 4 * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved. 5 * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved. 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public License 18 * along with this library; see the file COPYING.LIB. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 * 22 */ 23 24 #include "config.h" 25 #include "core/rendering/RenderReplaced.h" 26 27 #include "core/platform/graphics/GraphicsContext.h" 28 #include "core/rendering/LayoutRepainter.h" 29 #include "core/rendering/RenderBlock.h" 30 #include "core/rendering/RenderLayer.h" 31 #include "core/rendering/RenderView.h" 32 33 using namespace std; 34 35 namespace WebCore { 36 37 const int cDefaultWidth = 300; 38 const int cDefaultHeight = 150; 39 40 RenderReplaced::RenderReplaced(Element* element) 41 : RenderBox(element) 42 , m_intrinsicSize(cDefaultWidth, cDefaultHeight) 43 { 44 setReplaced(true); 45 } 46 47 RenderReplaced::RenderReplaced(Element* element, const LayoutSize& intrinsicSize) 48 : RenderBox(element) 49 , m_intrinsicSize(intrinsicSize) 50 { 51 setReplaced(true); 52 } 53 54 RenderReplaced::~RenderReplaced() 55 { 56 } 57 58 void RenderReplaced::willBeDestroyed() 59 { 60 if (!documentBeingDestroyed() && parent()) 61 parent()->dirtyLinesFromChangedChild(this); 62 63 RenderBox::willBeDestroyed(); 64 } 65 66 void RenderReplaced::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 67 { 68 RenderBox::styleDidChange(diff, oldStyle); 69 70 bool hadStyle = (oldStyle != 0); 71 float oldZoom = hadStyle ? oldStyle->effectiveZoom() : RenderStyle::initialZoom(); 72 if (style() && style()->effectiveZoom() != oldZoom) 73 intrinsicSizeChanged(); 74 } 75 76 void RenderReplaced::layout() 77 { 78 StackStats::LayoutCheckPoint layoutCheckPoint; 79 ASSERT(needsLayout()); 80 81 LayoutRepainter repainter(*this, checkForRepaintDuringLayout()); 82 83 setHeight(minimumReplacedHeight()); 84 85 updateLogicalWidth(); 86 updateLogicalHeight(); 87 88 m_overflow.clear(); 89 addVisualEffectOverflow(); 90 updateLayerTransform(); 91 invalidateBackgroundObscurationStatus(); 92 93 repainter.repaintAfterLayout(); 94 clearNeedsLayout(); 95 } 96 97 void RenderReplaced::intrinsicSizeChanged() 98 { 99 int scaledWidth = static_cast<int>(cDefaultWidth * style()->effectiveZoom()); 100 int scaledHeight = static_cast<int>(cDefaultHeight * style()->effectiveZoom()); 101 m_intrinsicSize = IntSize(scaledWidth, scaledHeight); 102 setNeedsLayoutAndPrefWidthsRecalc(); 103 } 104 105 void RenderReplaced::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) 106 { 107 ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this); 108 109 if (!shouldPaint(paintInfo, paintOffset)) 110 return; 111 112 LayoutPoint adjustedPaintOffset = paintOffset + location(); 113 114 if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) 115 paintBoxDecorations(paintInfo, adjustedPaintOffset); 116 117 if (paintInfo.phase == PaintPhaseMask) { 118 paintMask(paintInfo, adjustedPaintOffset); 119 return; 120 } 121 122 LayoutRect paintRect = LayoutRect(adjustedPaintOffset, size()); 123 if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth()) 124 paintOutline(paintInfo, paintRect); 125 126 if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection && !canHaveChildren()) 127 return; 128 129 if (!paintInfo.shouldPaintWithinRoot(this)) 130 return; 131 132 bool drawSelectionTint = selectionState() != SelectionNone && !document()->printing(); 133 if (paintInfo.phase == PaintPhaseSelection) { 134 if (selectionState() == SelectionNone) 135 return; 136 drawSelectionTint = false; 137 } 138 139 bool completelyClippedOut = false; 140 if (style()->hasBorderRadius()) { 141 LayoutRect borderRect = LayoutRect(adjustedPaintOffset, size()); 142 143 if (borderRect.isEmpty()) 144 completelyClippedOut = true; 145 else { 146 // Push a clip if we have a border radius, since we want to round the foreground content that gets painted. 147 paintInfo.context->save(); 148 RoundedRect roundedInnerRect = style()->getRoundedInnerBorderFor(paintRect, 149 paddingTop() + borderTop(), paddingBottom() + borderBottom(), paddingLeft() + borderLeft(), paddingRight() + borderRight(), true, true); 150 clipRoundedInnerRect(paintInfo.context, paintRect, roundedInnerRect); 151 } 152 } 153 154 if (!completelyClippedOut) { 155 paintReplaced(paintInfo, adjustedPaintOffset); 156 157 if (style()->hasBorderRadius()) 158 paintInfo.context->restore(); 159 } 160 161 // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of 162 // surrounding content. 163 if (drawSelectionTint) { 164 LayoutRect selectionPaintingRect = localSelectionRect(); 165 selectionPaintingRect.moveBy(adjustedPaintOffset); 166 paintInfo.context->fillRect(pixelSnappedIntRect(selectionPaintingRect), selectionBackgroundColor()); 167 } 168 } 169 170 bool RenderReplaced::shouldPaint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) 171 { 172 if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseOutline && paintInfo.phase != PaintPhaseSelfOutline 173 && paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseMask) 174 return false; 175 176 if (!paintInfo.shouldPaintWithinRoot(this)) 177 return false; 178 179 // if we're invisible or haven't received a layout yet, then just bail. 180 if (style()->visibility() != VISIBLE) 181 return false; 182 183 LayoutPoint adjustedPaintOffset = paintOffset + location(); 184 185 // Early exit if the element touches the edges. 186 LayoutUnit top = adjustedPaintOffset.y() + visualOverflowRect().y(); 187 LayoutUnit bottom = adjustedPaintOffset.y() + visualOverflowRect().maxY(); 188 if (isSelected() && m_inlineBoxWrapper) { 189 LayoutUnit selTop = paintOffset.y() + m_inlineBoxWrapper->root()->selectionTop(); 190 LayoutUnit selBottom = paintOffset.y() + selTop + m_inlineBoxWrapper->root()->selectionHeight(); 191 top = min(selTop, top); 192 bottom = max(selBottom, bottom); 193 } 194 195 LayoutRect localRepaintRect = paintInfo.rect; 196 localRepaintRect.inflate(maximalOutlineSize(paintInfo.phase)); 197 if (adjustedPaintOffset.x() + visualOverflowRect().x() >= localRepaintRect.maxX() || adjustedPaintOffset.x() + visualOverflowRect().maxX() <= localRepaintRect.x()) 198 return false; 199 200 if (top >= localRepaintRect.maxY() || bottom <= localRepaintRect.y()) 201 return false; 202 203 return true; 204 } 205 206 static inline RenderBlock* firstContainingBlockWithLogicalWidth(const RenderReplaced* replaced) 207 { 208 // We have to lookup the containing block, which has an explicit width, which must not be equal to our direct containing block. 209 // If the embedded document appears _after_ we performed the initial layout, our intrinsic size is 300x150. If our containing 210 // block doesn't provide an explicit width, it's set to the 300 default, coming from the initial layout run. 211 RenderBlock* containingBlock = replaced->containingBlock(); 212 if (!containingBlock) 213 return 0; 214 215 for (; !containingBlock->isRenderView() && !containingBlock->isBody(); containingBlock = containingBlock->containingBlock()) { 216 if (containingBlock->style()->logicalWidth().isSpecified()) 217 return containingBlock; 218 } 219 220 return 0; 221 } 222 223 bool RenderReplaced::hasReplacedLogicalWidth() const 224 { 225 if (style()->logicalWidth().isSpecified()) 226 return true; 227 228 if (style()->logicalWidth().isAuto()) 229 return false; 230 231 return firstContainingBlockWithLogicalWidth(this); 232 } 233 234 bool RenderReplaced::hasReplacedLogicalHeight() const 235 { 236 if (style()->logicalHeight().isAuto()) 237 return false; 238 239 if (style()->logicalHeight().isSpecified()) { 240 if (hasAutoHeightOrContainingBlockWithAutoHeight()) 241 return false; 242 return true; 243 } 244 245 if (style()->logicalHeight().isIntrinsic()) 246 return true; 247 248 return false; 249 } 250 251 bool RenderReplaced::needsPreferredWidthsRecalculation() const 252 { 253 // If the height is a percentage and the width is auto, then the containingBlocks's height changing can cause 254 // this node to change it's preferred width because it maintains aspect ratio. 255 return hasRelativeLogicalHeight() && style()->logicalWidth().isAuto() && !hasAutoHeightOrContainingBlockWithAutoHeight(); 256 } 257 258 static inline bool rendererHasAspectRatio(const RenderObject* renderer) 259 { 260 ASSERT(renderer); 261 return renderer->isImage() || renderer->isCanvas() || renderer->isVideo(); 262 } 263 264 void RenderReplaced::computeAspectRatioInformationForRenderBox(RenderBox* contentRenderer, FloatSize& constrainedSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const 265 { 266 FloatSize intrinsicSize; 267 if (contentRenderer) { 268 contentRenderer->computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize); 269 if (intrinsicRatio) 270 ASSERT(!isPercentageIntrinsicSize); 271 272 // Handle zoom & vertical writing modes here, as the embedded document doesn't know about them. 273 if (!isPercentageIntrinsicSize) 274 intrinsicSize.scale(style()->effectiveZoom()); 275 276 if (rendererHasAspectRatio(this) && isPercentageIntrinsicSize) 277 intrinsicRatio = 1; 278 279 // Update our intrinsic size to match what the content renderer has computed, so that when we 280 // constrain the size below, the correct intrinsic size will be obtained for comparison against 281 // min and max widths. 282 if (intrinsicRatio && !isPercentageIntrinsicSize && !intrinsicSize.isEmpty()) 283 m_intrinsicSize = LayoutSize(intrinsicSize); 284 285 if (!isHorizontalWritingMode()) { 286 if (intrinsicRatio) 287 intrinsicRatio = 1 / intrinsicRatio; 288 intrinsicSize = intrinsicSize.transposedSize(); 289 } 290 } else { 291 computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize); 292 if (intrinsicRatio) { 293 ASSERT(!isPercentageIntrinsicSize); 294 if (!intrinsicSize.isEmpty()) 295 m_intrinsicSize = LayoutSize(isHorizontalWritingMode() ? intrinsicSize : intrinsicSize.transposedSize()); 296 } 297 } 298 299 // Now constrain the intrinsic size along each axis according to minimum and maximum width/heights along the 300 // opposite axis. So for example a maximum width that shrinks our width will result in the height we compute here 301 // having to shrink in order to preserve the aspect ratio. Because we compute these values independently along 302 // each axis, the final returned size may in fact not preserve the aspect ratio. 303 // FIXME: In the long term, it might be better to just return this code more to the way it used to be before this 304 // function was added, since all it has done is make the code more unclear. 305 constrainedSize = intrinsicSize; 306 if (intrinsicRatio && !isPercentageIntrinsicSize && !intrinsicSize.isEmpty() && style()->logicalWidth().isAuto() && style()->logicalHeight().isAuto()) { 307 // We can't multiply or divide by 'intrinsicRatio' here, it breaks tests, like fast/images/zoomed-img-size.html, which 308 // can only be fixed once subpixel precision is available for things like intrinsicWidth/Height - which include zoom! 309 constrainedSize.setWidth(RenderBox::computeReplacedLogicalHeight() * intrinsicSize.width() / intrinsicSize.height()); 310 constrainedSize.setHeight(RenderBox::computeReplacedLogicalWidth() * intrinsicSize.height() / intrinsicSize.width()); 311 } 312 } 313 314 void RenderReplaced::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const 315 { 316 // If there's an embeddedContentBox() of a remote, referenced document available, this code-path should never be used. 317 ASSERT(!embeddedContentBox()); 318 isPercentageIntrinsicSize = false; 319 intrinsicSize = FloatSize(intrinsicLogicalWidth(), intrinsicLogicalHeight()); 320 321 // Figure out if we need to compute an intrinsic ratio. 322 if (intrinsicSize.isEmpty() || !rendererHasAspectRatio(this)) 323 return; 324 325 intrinsicRatio = intrinsicSize.width() / intrinsicSize.height(); 326 } 327 328 LayoutUnit RenderReplaced::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const 329 { 330 if (style()->logicalWidth().isSpecified() || style()->logicalWidth().isIntrinsic()) 331 return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(style()->logicalWidth()), shouldComputePreferred); 332 333 RenderBox* contentRenderer = embeddedContentBox(); 334 335 // 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width 336 bool isPercentageIntrinsicSize = false; 337 double intrinsicRatio = 0; 338 FloatSize constrainedSize; 339 computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio, isPercentageIntrinsicSize); 340 341 if (style()->logicalWidth().isAuto()) { 342 bool heightIsAuto = style()->logicalHeight().isAuto(); 343 bool hasIntrinsicWidth = !isPercentageIntrinsicSize && constrainedSize.width() > 0; 344 345 // If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic width, then that intrinsic width is the used value of 'width'. 346 if (heightIsAuto && hasIntrinsicWidth) 347 return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred); 348 349 bool hasIntrinsicHeight = !isPercentageIntrinsicSize && constrainedSize.height() > 0; 350 if (intrinsicRatio || isPercentageIntrinsicSize) { 351 // If 'height' and 'width' both have computed values of 'auto' and the element has no intrinsic width, but does have an intrinsic height and intrinsic ratio; 352 // or if 'width' has a computed value of 'auto', 'height' has some other computed value, and the element does have an intrinsic ratio; then the used value 353 // of 'width' is: (used height) * (intrinsic ratio) 354 if (intrinsicRatio && ((heightIsAuto && !hasIntrinsicWidth && hasIntrinsicHeight) || !heightIsAuto)) { 355 LayoutUnit logicalHeight = computeReplacedLogicalHeight(); 356 return computeReplacedLogicalWidthRespectingMinMaxWidth(roundToInt(round(logicalHeight * intrinsicRatio)), shouldComputePreferred); 357 } 358 359 // If 'height' and 'width' both have computed values of 'auto' and the element has an intrinsic ratio but no intrinsic height or width, then the used value of 360 // 'width' is undefined in CSS 2.1. However, it is suggested that, if the containing block's width does not itself depend on the replaced element's width, then 361 // the used value of 'width' is calculated from the constraint equation used for block-level, non-replaced elements in normal flow. 362 if (heightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight) { 363 // The aforementioned 'constraint equation' used for block-level, non-replaced elements in normal flow: 364 // 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block 365 LayoutUnit logicalWidth; 366 if (RenderBlock* blockWithWidth = firstContainingBlockWithLogicalWidth(this)) 367 logicalWidth = blockWithWidth->computeReplacedLogicalWidthRespectingMinMaxWidth(blockWithWidth->computeReplacedLogicalWidthUsing(blockWithWidth->style()->logicalWidth()), shouldComputePreferred); 368 else 369 logicalWidth = containingBlock()->availableLogicalWidth(); 370 371 // This solves above equation for 'width' (== logicalWidth). 372 LayoutUnit marginStart = minimumValueForLength(style()->marginStart(), logicalWidth); 373 LayoutUnit marginEnd = minimumValueForLength(style()->marginEnd(), logicalWidth); 374 logicalWidth = max<LayoutUnit>(0, logicalWidth - (marginStart + marginEnd + (width() - clientWidth()))); 375 if (isPercentageIntrinsicSize) 376 logicalWidth = logicalWidth * constrainedSize.width() / 100; 377 return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth, shouldComputePreferred); 378 } 379 } 380 381 // Otherwise, if 'width' has a computed value of 'auto', and the element has an intrinsic width, then that intrinsic width is the used value of 'width'. 382 if (hasIntrinsicWidth) 383 return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred); 384 385 // Otherwise, if 'width' has a computed value of 'auto', but none of the conditions above are met, then the used value of 'width' becomes 300px. If 300px is too 386 // wide to fit the device, UAs should use the width of the largest rectangle that has a 2:1 ratio and fits the device instead. 387 // Note: We fall through and instead return intrinsicLogicalWidth() here - to preserve existing WebKit behavior, which might or might not be correct, or desired. 388 // Changing this to return cDefaultWidth, will affect lots of test results. Eg. some tests assume that a blank <img> tag (which implies width/height=auto) 389 // has no intrinsic size, which is wrong per CSS 2.1, but matches our behavior since a long time. 390 } 391 392 return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), shouldComputePreferred); 393 } 394 395 LayoutUnit RenderReplaced::computeReplacedLogicalHeight() const 396 { 397 // 10.5 Content height: the 'height' property: http://www.w3.org/TR/CSS21/visudet.html#propdef-height 398 if (hasReplacedLogicalHeight()) 399 return computeReplacedLogicalHeightRespectingMinMaxHeight(computeReplacedLogicalHeightUsing(style()->logicalHeight())); 400 401 RenderBox* contentRenderer = embeddedContentBox(); 402 403 // 10.6.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-height 404 bool isPercentageIntrinsicSize = false; 405 double intrinsicRatio = 0; 406 FloatSize constrainedSize; 407 computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio, isPercentageIntrinsicSize); 408 409 bool widthIsAuto = style()->logicalWidth().isAuto(); 410 bool hasIntrinsicHeight = !isPercentageIntrinsicSize && constrainedSize.height() > 0; 411 412 // If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic height, then that intrinsic height is the used value of 'height'. 413 if (widthIsAuto && hasIntrinsicHeight) 414 return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height()); 415 416 // Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic ratio then the used value of 'height' is: 417 // (used width) / (intrinsic ratio) 418 if (intrinsicRatio) 419 return computeReplacedLogicalHeightRespectingMinMaxHeight(roundToInt(round(availableLogicalWidth() / intrinsicRatio))); 420 421 // Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic height, then that intrinsic height is the used value of 'height'. 422 if (hasIntrinsicHeight) 423 return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height()); 424 425 // Otherwise, if 'height' has a computed value of 'auto', but none of the conditions above are met, then the used value of 'height' must be set to the height 426 // of the largest rectangle that has a 2:1 ratio, has a height not greater than 150px, and has a width not greater than the device width. 427 return computeReplacedLogicalHeightRespectingMinMaxHeight(intrinsicLogicalHeight()); 428 } 429 430 void RenderReplaced::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const 431 { 432 minLogicalWidth = maxLogicalWidth = intrinsicLogicalWidth(); 433 } 434 435 void RenderReplaced::computePreferredLogicalWidths() 436 { 437 ASSERT(preferredLogicalWidthsDirty()); 438 439 // We cannot resolve any percent logical width here as the available logical 440 // width may not be set on our containing block. 441 if (style()->logicalWidth().isPercent()) 442 computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth); 443 else 444 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeReplacedLogicalWidth(ComputePreferred); 445 446 RenderStyle* styleToUse = style(); 447 if (styleToUse->logicalWidth().isPercent() || styleToUse->logicalMaxWidth().isPercent() || hasRelativeIntrinsicLogicalWidth()) 448 m_minPreferredLogicalWidth = 0; 449 450 if (styleToUse->logicalMinWidth().isFixed() && styleToUse->logicalMinWidth().value() > 0) { 451 m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value())); 452 m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value())); 453 } 454 455 if (styleToUse->logicalMaxWidth().isFixed()) { 456 m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value())); 457 m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value())); 458 } 459 460 LayoutUnit borderAndPadding = borderAndPaddingLogicalWidth(); 461 m_minPreferredLogicalWidth += borderAndPadding; 462 m_maxPreferredLogicalWidth += borderAndPadding; 463 464 setPreferredLogicalWidthsDirty(false); 465 } 466 467 PositionWithAffinity RenderReplaced::positionForPoint(const LayoutPoint& point) 468 { 469 // FIXME: This code is buggy if the replaced element is relative positioned. 470 InlineBox* box = inlineBoxWrapper(); 471 RootInlineBox* rootBox = box ? box->root() : 0; 472 473 LayoutUnit top = rootBox ? rootBox->selectionTop() : logicalTop(); 474 LayoutUnit bottom = rootBox ? rootBox->selectionBottom() : logicalBottom(); 475 476 LayoutUnit blockDirectionPosition = isHorizontalWritingMode() ? point.y() + y() : point.x() + x(); 477 LayoutUnit lineDirectionPosition = isHorizontalWritingMode() ? point.x() + x() : point.y() + y(); 478 479 if (blockDirectionPosition < top) 480 return createPositionWithAffinity(caretMinOffset(), DOWNSTREAM); // coordinates are above 481 482 if (blockDirectionPosition >= bottom) 483 return createPositionWithAffinity(caretMaxOffset(), DOWNSTREAM); // coordinates are below 484 485 if (node()) { 486 if (lineDirectionPosition <= logicalLeft() + (logicalWidth() / 2)) 487 return createPositionWithAffinity(0, DOWNSTREAM); 488 return createPositionWithAffinity(1, DOWNSTREAM); 489 } 490 491 return RenderBox::positionForPoint(point); 492 } 493 494 LayoutRect RenderReplaced::selectionRectForRepaint(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent) 495 { 496 ASSERT(!needsLayout()); 497 498 if (!isSelected()) 499 return LayoutRect(); 500 501 LayoutRect rect = localSelectionRect(); 502 if (clipToVisibleContent) 503 computeRectForRepaint(repaintContainer, rect); 504 else 505 rect = localToContainerQuad(FloatRect(rect), repaintContainer).enclosingBoundingBox(); 506 507 return rect; 508 } 509 510 LayoutRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const 511 { 512 if (checkWhetherSelected && !isSelected()) 513 return LayoutRect(); 514 515 if (!m_inlineBoxWrapper) 516 // We're a block-level replaced element. Just return our own dimensions. 517 return LayoutRect(LayoutPoint(), size()); 518 519 RootInlineBox* root = m_inlineBoxWrapper->root(); 520 LayoutUnit newLogicalTop = root->block()->style()->isFlippedBlocksWritingMode() ? m_inlineBoxWrapper->logicalBottom() - root->selectionBottom() : root->selectionTop() - m_inlineBoxWrapper->logicalTop(); 521 if (root->block()->style()->isHorizontalWritingMode()) 522 return LayoutRect(0, newLogicalTop, width(), root->selectionHeight()); 523 return LayoutRect(newLogicalTop, 0, root->selectionHeight(), height()); 524 } 525 526 void RenderReplaced::setSelectionState(SelectionState state) 527 { 528 // The selection state for our containing block hierarchy is updated by the base class call. 529 RenderBox::setSelectionState(state); 530 531 if (m_inlineBoxWrapper && canUpdateSelectionOnRootLineBoxes()) 532 if (RootInlineBox* root = m_inlineBoxWrapper->root()) 533 root->setHasSelectedChildren(isSelected()); 534 } 535 536 bool RenderReplaced::isSelected() const 537 { 538 SelectionState s = selectionState(); 539 if (s == SelectionNone) 540 return false; 541 if (s == SelectionInside) 542 return true; 543 544 int selectionStart, selectionEnd; 545 selectionStartEnd(selectionStart, selectionEnd); 546 if (s == SelectionStart) 547 return selectionStart == 0; 548 549 int end = node()->hasChildNodes() ? node()->childNodeCount() : 1; 550 if (s == SelectionEnd) 551 return selectionEnd == end; 552 if (s == SelectionBoth) 553 return selectionStart == 0 && selectionEnd == end; 554 555 ASSERT(0); 556 return false; 557 } 558 559 LayoutRect RenderReplaced::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const 560 { 561 if (style()->visibility() != VISIBLE && !enclosingLayer()->hasVisibleContent()) 562 return LayoutRect(); 563 564 // The selectionRect can project outside of the overflowRect, so take their union 565 // for repainting to avoid selection painting glitches. 566 LayoutRect r = unionRect(localSelectionRect(false), visualOverflowRect()); 567 568 RenderView* v = view(); 569 if (v) { 570 // FIXME: layoutDelta needs to be applied in parts before/after transforms and 571 // repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308 572 r.move(v->layoutDelta()); 573 } 574 575 if (style()) { 576 if (v) 577 r.inflate(style()->outlineSize()); 578 } 579 computeRectForRepaint(repaintContainer, r); 580 return r; 581 } 582 583 } 584
