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/editing/PositionWithAffinity.h" 28 #include "core/paint/BoxPainter.h" 29 #include "core/rendering/GraphicsContextAnnotator.h" 30 #include "core/rendering/RenderBlock.h" 31 #include "core/rendering/RenderImage.h" 32 #include "core/rendering/RenderLayer.h" 33 #include "core/rendering/RenderView.h" 34 #include "platform/LengthFunctions.h" 35 #include "platform/graphics/GraphicsContext.h" 36 37 namespace blink { 38 39 const int RenderReplaced::defaultWidth = 300; 40 const int RenderReplaced::defaultHeight = 150; 41 42 RenderReplaced::RenderReplaced(Element* element) 43 : RenderBox(element) 44 , m_intrinsicSize(defaultWidth, defaultHeight) 45 { 46 setReplaced(true); 47 } 48 49 RenderReplaced::RenderReplaced(Element* element, const LayoutSize& intrinsicSize) 50 : RenderBox(element) 51 , m_intrinsicSize(intrinsicSize) 52 { 53 setReplaced(true); 54 } 55 56 RenderReplaced::~RenderReplaced() 57 { 58 } 59 60 void RenderReplaced::willBeDestroyed() 61 { 62 if (!documentBeingDestroyed() && parent()) 63 parent()->dirtyLinesFromChangedChild(this); 64 65 RenderBox::willBeDestroyed(); 66 } 67 68 void RenderReplaced::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 69 { 70 RenderBox::styleDidChange(diff, oldStyle); 71 72 bool hadStyle = (oldStyle != 0); 73 float oldZoom = hadStyle ? oldStyle->effectiveZoom() : RenderStyle::initialZoom(); 74 if (style() && style()->effectiveZoom() != oldZoom) 75 intrinsicSizeChanged(); 76 } 77 78 void RenderReplaced::layout() 79 { 80 ASSERT(needsLayout()); 81 82 LayoutRect oldContentRect = replacedContentRect(); 83 84 setHeight(minimumReplacedHeight()); 85 86 updateLogicalWidth(); 87 updateLogicalHeight(); 88 89 m_overflow.clear(); 90 addVisualEffectOverflow(); 91 updateLayerTransformAfterLayout(); 92 invalidateBackgroundObscurationStatus(); 93 94 clearNeedsLayout(); 95 96 if (replacedContentRect() != oldContentRect) 97 setShouldDoFullPaintInvalidation(true); 98 } 99 100 void RenderReplaced::intrinsicSizeChanged() 101 { 102 int scaledWidth = static_cast<int>(defaultWidth * style()->effectiveZoom()); 103 int scaledHeight = static_cast<int>(defaultHeight * style()->effectiveZoom()); 104 m_intrinsicSize = IntSize(scaledWidth, scaledHeight); 105 setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(); 106 } 107 108 void RenderReplaced::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) 109 { 110 ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this); 111 112 if (!shouldPaint(paintInfo, paintOffset)) 113 return; 114 115 LayoutPoint adjustedPaintOffset = paintOffset + location(); 116 117 if (hasBoxDecorationBackground() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) 118 paintBoxDecorationBackground(paintInfo, adjustedPaintOffset); 119 120 if (paintInfo.phase == PaintPhaseMask) { 121 paintMask(paintInfo, adjustedPaintOffset); 122 return; 123 } 124 125 if (paintInfo.phase == PaintPhaseClippingMask && (!hasLayer() || !layer()->hasCompositedClippingMask())) 126 return; 127 128 LayoutRect paintRect = LayoutRect(adjustedPaintOffset, size()); 129 if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth()) 130 paintOutline(paintInfo, paintRect); 131 132 if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection && !canHaveChildren() && paintInfo.phase != PaintPhaseClippingMask) 133 return; 134 135 if (!paintInfo.shouldPaintWithinRoot(this)) 136 return; 137 138 bool drawSelectionTint = selectionState() != SelectionNone && !document().printing(); 139 if (paintInfo.phase == PaintPhaseSelection) { 140 if (selectionState() == SelectionNone) 141 return; 142 drawSelectionTint = false; 143 } 144 145 bool completelyClippedOut = false; 146 if (style()->hasBorderRadius()) { 147 LayoutRect borderRect = LayoutRect(adjustedPaintOffset, size()); 148 149 if (borderRect.isEmpty()) 150 completelyClippedOut = true; 151 else { 152 // Push a clip if we have a border radius, since we want to round the foreground content that gets painted. 153 paintInfo.context->save(); 154 RoundedRect roundedInnerRect = style()->getRoundedInnerBorderFor(paintRect, 155 paddingTop() + borderTop(), paddingBottom() + borderBottom(), paddingLeft() + borderLeft(), paddingRight() + borderRight(), true, true); 156 BoxPainter::clipRoundedInnerRect(paintInfo.context, paintRect, roundedInnerRect); 157 } 158 } 159 160 if (!completelyClippedOut) { 161 if (paintInfo.phase == PaintPhaseClippingMask) { 162 paintClippingMask(paintInfo, adjustedPaintOffset); 163 } else { 164 paintReplaced(paintInfo, adjustedPaintOffset); 165 } 166 167 if (style()->hasBorderRadius()) 168 paintInfo.context->restore(); 169 } 170 171 // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of 172 // surrounding content. 173 if (drawSelectionTint) { 174 LayoutRect selectionPaintingRect = localSelectionRect(); 175 selectionPaintingRect.moveBy(adjustedPaintOffset); 176 paintInfo.context->fillRect(pixelSnappedIntRect(selectionPaintingRect), selectionBackgroundColor()); 177 } 178 } 179 180 bool RenderReplaced::shouldPaint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) 181 { 182 if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseOutline && paintInfo.phase != PaintPhaseSelfOutline 183 && paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseMask && paintInfo.phase != PaintPhaseClippingMask) 184 return false; 185 186 if (!paintInfo.shouldPaintWithinRoot(this)) 187 return false; 188 189 // if we're invisible or haven't received a layout yet, then just bail. 190 if (style()->visibility() != VISIBLE) 191 return false; 192 193 LayoutPoint adjustedPaintOffset = paintOffset + location(); 194 195 // Early exit if the element touches the edges. 196 LayoutUnit top = adjustedPaintOffset.y() + visualOverflowRect().y(); 197 LayoutUnit bottom = adjustedPaintOffset.y() + visualOverflowRect().maxY(); 198 if (isSelected() && inlineBoxWrapper()) { 199 LayoutUnit selTop = paintOffset.y() + inlineBoxWrapper()->root().selectionTop(); 200 LayoutUnit selBottom = paintOffset.y() + selTop + inlineBoxWrapper()->root().selectionHeight(); 201 top = std::min(selTop, top); 202 bottom = std::max(selBottom, bottom); 203 } 204 205 if (adjustedPaintOffset.x() + visualOverflowRect().x() >= paintInfo.rect.maxX() || adjustedPaintOffset.x() + visualOverflowRect().maxX() <= paintInfo.rect.x()) 206 return false; 207 208 if (top >= paintInfo.rect.maxY() || bottom <= paintInfo.rect.y()) 209 return false; 210 211 return true; 212 } 213 214 bool RenderReplaced::hasReplacedLogicalHeight() const 215 { 216 if (style()->logicalHeight().isAuto()) 217 return false; 218 219 if (style()->logicalHeight().isSpecified()) { 220 if (hasAutoHeightOrContainingBlockWithAutoHeight()) 221 return false; 222 return true; 223 } 224 225 if (style()->logicalHeight().isIntrinsic()) 226 return true; 227 228 return false; 229 } 230 231 bool RenderReplaced::needsPreferredWidthsRecalculation() const 232 { 233 // If the height is a percentage and the width is auto, then the containingBlocks's height changing can cause 234 // this node to change it's preferred width because it maintains aspect ratio. 235 return hasRelativeLogicalHeight() && style()->logicalWidth().isAuto() && !hasAutoHeightOrContainingBlockWithAutoHeight(); 236 } 237 238 static inline bool rendererHasAspectRatio(const RenderObject* renderer) 239 { 240 ASSERT(renderer); 241 return renderer->isImage() || renderer->isCanvas() || renderer->isVideo(); 242 } 243 244 void RenderReplaced::computeAspectRatioInformationForRenderBox(RenderBox* contentRenderer, FloatSize& constrainedSize, double& intrinsicRatio) const 245 { 246 FloatSize intrinsicSize; 247 if (contentRenderer) { 248 contentRenderer->computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio); 249 250 // Handle zoom & vertical writing modes here, as the embedded document doesn't know about them. 251 intrinsicSize.scale(style()->effectiveZoom()); 252 if (isRenderImage()) 253 intrinsicSize.scale(toRenderImage(this)->imageDevicePixelRatio()); 254 255 // Update our intrinsic size to match what the content renderer has computed, so that when we 256 // constrain the size below, the correct intrinsic size will be obtained for comparison against 257 // min and max widths. 258 if (intrinsicRatio && !intrinsicSize.isEmpty()) 259 m_intrinsicSize = LayoutSize(intrinsicSize); 260 261 if (!isHorizontalWritingMode()) { 262 if (intrinsicRatio) 263 intrinsicRatio = 1 / intrinsicRatio; 264 intrinsicSize = intrinsicSize.transposedSize(); 265 } 266 } else { 267 computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio); 268 if (intrinsicRatio && !intrinsicSize.isEmpty()) 269 m_intrinsicSize = LayoutSize(isHorizontalWritingMode() ? intrinsicSize : intrinsicSize.transposedSize()); 270 } 271 272 // Now constrain the intrinsic size along each axis according to minimum and maximum width/heights along the 273 // opposite axis. So for example a maximum width that shrinks our width will result in the height we compute here 274 // having to shrink in order to preserve the aspect ratio. Because we compute these values independently along 275 // each axis, the final returned size may in fact not preserve the aspect ratio. 276 // FIXME: In the long term, it might be better to just return this code more to the way it used to be before this 277 // function was added, since all it has done is make the code more unclear. 278 constrainedSize = intrinsicSize; 279 if (intrinsicRatio && !intrinsicSize.isEmpty() && style()->logicalWidth().isAuto() && style()->logicalHeight().isAuto()) { 280 // We can't multiply or divide by 'intrinsicRatio' here, it breaks tests, like fast/images/zoomed-img-size.html, which 281 // can only be fixed once subpixel precision is available for things like intrinsicWidth/Height - which include zoom! 282 constrainedSize.setWidth(RenderBox::computeReplacedLogicalHeight() * intrinsicSize.width() / intrinsicSize.height()); 283 constrainedSize.setHeight(RenderBox::computeReplacedLogicalWidth() * intrinsicSize.height() / intrinsicSize.width()); 284 } 285 } 286 287 LayoutRect RenderReplaced::replacedContentRect(const LayoutSize* overriddenIntrinsicSize) const 288 { 289 LayoutRect contentRect = contentBoxRect(); 290 ObjectFit objectFit = style()->objectFit(); 291 292 if (objectFit == ObjectFitFill && style()->objectPosition() == RenderStyle::initialObjectPosition()) { 293 return contentRect; 294 } 295 296 LayoutSize intrinsicSize = overriddenIntrinsicSize ? *overriddenIntrinsicSize : this->intrinsicSize(); 297 if (!intrinsicSize.width() || !intrinsicSize.height()) 298 return contentRect; 299 300 LayoutRect finalRect = contentRect; 301 switch (objectFit) { 302 case ObjectFitContain: 303 case ObjectFitScaleDown: 304 case ObjectFitCover: 305 finalRect.setSize(finalRect.size().fitToAspectRatio(intrinsicSize, objectFit == ObjectFitCover ? AspectRatioFitGrow : AspectRatioFitShrink)); 306 if (objectFit != ObjectFitScaleDown || finalRect.width() <= intrinsicSize.width()) 307 break; 308 // fall through 309 case ObjectFitNone: 310 finalRect.setSize(intrinsicSize); 311 break; 312 case ObjectFitFill: 313 break; 314 default: 315 ASSERT_NOT_REACHED(); 316 } 317 318 LayoutUnit xOffset = minimumValueForLength(style()->objectPosition().x(), contentRect.width() - finalRect.width()); 319 LayoutUnit yOffset = minimumValueForLength(style()->objectPosition().y(), contentRect.height() - finalRect.height()); 320 finalRect.move(xOffset, yOffset); 321 322 return finalRect; 323 } 324 325 void RenderReplaced::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio) const 326 { 327 // If there's an embeddedContentBox() of a remote, referenced document available, this code-path should never be used. 328 ASSERT(!embeddedContentBox()); 329 intrinsicSize = FloatSize(intrinsicLogicalWidth().toFloat(), intrinsicLogicalHeight().toFloat()); 330 331 // Figure out if we need to compute an intrinsic ratio. 332 if (intrinsicSize.isEmpty() || !rendererHasAspectRatio(this)) 333 return; 334 335 intrinsicRatio = intrinsicSize.width() / intrinsicSize.height(); 336 } 337 338 LayoutUnit RenderReplaced::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const 339 { 340 if (style()->logicalWidth().isSpecified() || style()->logicalWidth().isIntrinsic()) 341 return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(style()->logicalWidth()), shouldComputePreferred); 342 343 RenderBox* contentRenderer = embeddedContentBox(); 344 345 // 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width 346 double intrinsicRatio = 0; 347 FloatSize constrainedSize; 348 computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio); 349 350 if (style()->logicalWidth().isAuto()) { 351 bool computedHeightIsAuto = hasAutoHeightOrContainingBlockWithAutoHeight(); 352 bool hasIntrinsicWidth = constrainedSize.width() > 0; 353 354 // 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'. 355 if (computedHeightIsAuto && hasIntrinsicWidth) 356 return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred); 357 358 bool hasIntrinsicHeight = constrainedSize.height() > 0; 359 if (intrinsicRatio) { 360 // 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; 361 // 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 362 // of 'width' is: (used height) * (intrinsic ratio) 363 if (intrinsicRatio && ((computedHeightIsAuto && !hasIntrinsicWidth && hasIntrinsicHeight) || !computedHeightIsAuto)) { 364 LayoutUnit logicalHeight = computeReplacedLogicalHeight(); 365 return computeReplacedLogicalWidthRespectingMinMaxWidth(roundToInt(round(logicalHeight * intrinsicRatio)), shouldComputePreferred); 366 } 367 368 // 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 369 // '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 370 // the used value of 'width' is calculated from the constraint equation used for block-level, non-replaced elements in normal flow. 371 if (computedHeightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight) { 372 if (shouldComputePreferred == ComputePreferred) 373 return 0; 374 // The aforementioned 'constraint equation' used for block-level, non-replaced elements in normal flow: 375 // 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block 376 LayoutUnit logicalWidth = containingBlock()->availableLogicalWidth(); 377 378 // This solves above equation for 'width' (== logicalWidth). 379 LayoutUnit marginStart = minimumValueForLength(style()->marginStart(), logicalWidth); 380 LayoutUnit marginEnd = minimumValueForLength(style()->marginEnd(), logicalWidth); 381 logicalWidth = std::max<LayoutUnit>(0, logicalWidth - (marginStart + marginEnd + (width() - clientWidth()))); 382 return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth, shouldComputePreferred); 383 } 384 } 385 386 // 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'. 387 if (hasIntrinsicWidth) 388 return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred); 389 390 // 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 391 // 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. 392 // Note: We fall through and instead return intrinsicLogicalWidth() here - to preserve existing WebKit behavior, which might or might not be correct, or desired. 393 // 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) 394 // has no intrinsic size, which is wrong per CSS 2.1, but matches our behavior since a long time. 395 } 396 397 return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), shouldComputePreferred); 398 } 399 400 LayoutUnit RenderReplaced::computeReplacedLogicalHeight() const 401 { 402 // 10.5 Content height: the 'height' property: http://www.w3.org/TR/CSS21/visudet.html#propdef-height 403 if (hasReplacedLogicalHeight()) 404 return computeReplacedLogicalHeightRespectingMinMaxHeight(computeReplacedLogicalHeightUsing(style()->logicalHeight())); 405 406 RenderBox* contentRenderer = embeddedContentBox(); 407 408 // 10.6.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-height 409 double intrinsicRatio = 0; 410 FloatSize constrainedSize; 411 computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio); 412 413 bool widthIsAuto = style()->logicalWidth().isAuto(); 414 bool hasIntrinsicHeight = constrainedSize.height() > 0; 415 416 // 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'. 417 if (widthIsAuto && hasIntrinsicHeight) 418 return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height()); 419 420 // Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic ratio then the used value of 'height' is: 421 // (used width) / (intrinsic ratio) 422 if (intrinsicRatio) 423 return computeReplacedLogicalHeightRespectingMinMaxHeight(roundToInt(round(availableLogicalWidth() / intrinsicRatio))); 424 425 // 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'. 426 if (hasIntrinsicHeight) 427 return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height()); 428 429 // 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 430 // 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. 431 return computeReplacedLogicalHeightRespectingMinMaxHeight(intrinsicLogicalHeight()); 432 } 433 434 void RenderReplaced::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const 435 { 436 minLogicalWidth = maxLogicalWidth = intrinsicLogicalWidth(); 437 } 438 439 void RenderReplaced::computePreferredLogicalWidths() 440 { 441 ASSERT(preferredLogicalWidthsDirty()); 442 443 // We cannot resolve any percent logical width here as the available logical 444 // width may not be set on our containing block. 445 if (style()->logicalWidth().isPercent()) 446 computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth); 447 else 448 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeReplacedLogicalWidth(ComputePreferred); 449 450 RenderStyle* styleToUse = style(); 451 if (styleToUse->logicalWidth().isPercent() || styleToUse->logicalMaxWidth().isPercent()) 452 m_minPreferredLogicalWidth = 0; 453 454 if (styleToUse->logicalMinWidth().isFixed() && styleToUse->logicalMinWidth().value() > 0) { 455 m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value())); 456 m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value())); 457 } 458 459 if (styleToUse->logicalMaxWidth().isFixed()) { 460 m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value())); 461 m_minPreferredLogicalWidth = std::min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value())); 462 } 463 464 LayoutUnit borderAndPadding = borderAndPaddingLogicalWidth(); 465 m_minPreferredLogicalWidth += borderAndPadding; 466 m_maxPreferredLogicalWidth += borderAndPadding; 467 468 clearPreferredLogicalWidthsDirty(); 469 } 470 471 PositionWithAffinity RenderReplaced::positionForPoint(const LayoutPoint& point) 472 { 473 // FIXME: This code is buggy if the replaced element is relative positioned. 474 InlineBox* box = inlineBoxWrapper(); 475 RootInlineBox* rootBox = box ? &box->root() : 0; 476 477 LayoutUnit top = rootBox ? rootBox->selectionTop() : logicalTop(); 478 LayoutUnit bottom = rootBox ? rootBox->selectionBottom() : logicalBottom(); 479 480 LayoutUnit blockDirectionPosition = isHorizontalWritingMode() ? point.y() + y() : point.x() + x(); 481 LayoutUnit lineDirectionPosition = isHorizontalWritingMode() ? point.x() + x() : point.y() + y(); 482 483 if (blockDirectionPosition < top) 484 return createPositionWithAffinity(caretMinOffset(), DOWNSTREAM); // coordinates are above 485 486 if (blockDirectionPosition >= bottom) 487 return createPositionWithAffinity(caretMaxOffset(), DOWNSTREAM); // coordinates are below 488 489 if (node()) { 490 if (lineDirectionPosition <= logicalLeft() + (logicalWidth() / 2)) 491 return createPositionWithAffinity(0, DOWNSTREAM); 492 return createPositionWithAffinity(1, DOWNSTREAM); 493 } 494 495 return RenderBox::positionForPoint(point); 496 } 497 498 LayoutRect RenderReplaced::selectionRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer) const 499 { 500 ASSERT(!needsLayout()); 501 502 if (!isSelected()) 503 return LayoutRect(); 504 505 LayoutRect rect = localSelectionRect(); 506 mapRectToPaintInvalidationBacking(paintInvalidationContainer, rect, 0); 507 return rect; 508 } 509 510 LayoutRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const 511 { 512 if (checkWhetherSelected && !isSelected()) 513 return LayoutRect(); 514 515 if (!inlineBoxWrapper()) 516 // We're a block-level replaced element. Just return our own dimensions. 517 return LayoutRect(LayoutPoint(), size()); 518 519 RootInlineBox& root = inlineBoxWrapper()->root(); 520 LayoutUnit newLogicalTop = root.block().style()->isFlippedBlocksWritingMode() ? inlineBoxWrapper()->logicalBottom() - root.selectionBottom() : root.selectionTop() - 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 (!inlineBoxWrapper()) 532 return; 533 534 // We only include the space below the baseline in our layer's cached paint invalidation rect if the 535 // image is selected. Since the selection state has changed update the rect. 536 if (hasLayer()) 537 setPreviousPaintInvalidationRect(boundsRectForPaintInvalidation(containerForPaintInvalidation())); 538 539 if (canUpdateSelectionOnRootLineBoxes()) 540 inlineBoxWrapper()->root().setHasSelectedChildren(isSelected()); 541 } 542 543 bool RenderReplaced::isSelected() const 544 { 545 SelectionState s = selectionState(); 546 if (s == SelectionNone) 547 return false; 548 if (s == SelectionInside) 549 return true; 550 551 int selectionStart, selectionEnd; 552 selectionStartEnd(selectionStart, selectionEnd); 553 if (s == SelectionStart) 554 return selectionStart == 0; 555 556 int end = node()->hasChildren() ? node()->countChildren() : 1; 557 if (s == SelectionEnd) 558 return selectionEnd == end; 559 if (s == SelectionBoth) 560 return selectionStart == 0 && selectionEnd == end; 561 562 ASSERT(0); 563 return false; 564 } 565 LayoutRect RenderReplaced::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const 566 { 567 if (style()->visibility() != VISIBLE && !enclosingLayer()->hasVisibleContent()) 568 return LayoutRect(); 569 570 // The selectionRect can project outside of the overflowRect, so take their union 571 // for paint invalidation to avoid selection painting glitches. 572 LayoutRect r = isSelected() ? localSelectionRect() : visualOverflowRect(); 573 mapRectToPaintInvalidationBacking(paintInvalidationContainer, r, paintInvalidationState); 574 return r; 575 } 576 577 } 578
