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 "RuntimeEnabledFeatures.h" 28 #include "core/rendering/GraphicsContextAnnotator.h" 29 #include "core/rendering/LayoutRectRecorder.h" 30 #include "core/rendering/LayoutRepainter.h" 31 #include "core/rendering/RenderBlock.h" 32 #include "core/rendering/RenderImage.h" 33 #include "core/rendering/RenderLayer.h" 34 #include "core/rendering/RenderView.h" 35 #include "platform/graphics/GraphicsContext.h" 36 37 using namespace std; 38 39 namespace WebCore { 40 41 const int cDefaultWidth = 300; 42 const int cDefaultHeight = 150; 43 44 RenderReplaced::RenderReplaced(Element* element) 45 : RenderBox(element) 46 , m_intrinsicSize(cDefaultWidth, cDefaultHeight) 47 { 48 setReplaced(true); 49 } 50 51 RenderReplaced::RenderReplaced(Element* element, const LayoutSize& intrinsicSize) 52 : RenderBox(element) 53 , m_intrinsicSize(intrinsicSize) 54 { 55 setReplaced(true); 56 } 57 58 RenderReplaced::~RenderReplaced() 59 { 60 } 61 62 void RenderReplaced::willBeDestroyed() 63 { 64 if (!documentBeingDestroyed() && parent()) 65 parent()->dirtyLinesFromChangedChild(this); 66 67 RenderBox::willBeDestroyed(); 68 } 69 70 void RenderReplaced::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 71 { 72 RenderBox::styleDidChange(diff, oldStyle); 73 74 bool hadStyle = (oldStyle != 0); 75 float oldZoom = hadStyle ? oldStyle->effectiveZoom() : RenderStyle::initialZoom(); 76 if (style() && style()->effectiveZoom() != oldZoom) 77 intrinsicSizeChanged(); 78 } 79 80 void RenderReplaced::layout() 81 { 82 ASSERT(needsLayout()); 83 84 LayoutRectRecorder recorder(*this); 85 LayoutRepainter repainter(*this, checkForRepaintDuringLayout()); 86 87 setHeight(minimumReplacedHeight()); 88 89 updateLogicalWidth(); 90 updateLogicalHeight(); 91 92 m_overflow.clear(); 93 addVisualEffectOverflow(); 94 updateLayerTransform(); 95 invalidateBackgroundObscurationStatus(); 96 97 repainter.repaintAfterLayout(); 98 clearNeedsLayout(); 99 } 100 101 void RenderReplaced::intrinsicSizeChanged() 102 { 103 int scaledWidth = static_cast<int>(cDefaultWidth * style()->effectiveZoom()); 104 int scaledHeight = static_cast<int>(cDefaultHeight * style()->effectiveZoom()); 105 m_intrinsicSize = IntSize(scaledWidth, scaledHeight); 106 setNeedsLayoutAndPrefWidthsRecalc(); 107 } 108 109 void RenderReplaced::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) 110 { 111 ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this); 112 113 if (!shouldPaint(paintInfo, paintOffset)) 114 return; 115 116 LayoutPoint adjustedPaintOffset = paintOffset + location(); 117 118 if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) 119 paintBoxDecorations(paintInfo, adjustedPaintOffset); 120 121 if (paintInfo.phase == PaintPhaseMask) { 122 paintMask(paintInfo, adjustedPaintOffset); 123 return; 124 } 125 126 if (paintInfo.phase == PaintPhaseClippingMask && (!hasLayer() || !layer()->hasCompositedClippingMask())) 127 return; 128 129 LayoutRect paintRect = LayoutRect(adjustedPaintOffset, size()); 130 if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth()) 131 paintOutline(paintInfo, paintRect); 132 133 if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection && !canHaveChildren() && paintInfo.phase != PaintPhaseClippingMask) 134 return; 135 136 if (!paintInfo.shouldPaintWithinRoot(this)) 137 return; 138 139 bool drawSelectionTint = selectionState() != SelectionNone && !document().printing(); 140 if (paintInfo.phase == PaintPhaseSelection) { 141 if (selectionState() == SelectionNone) 142 return; 143 drawSelectionTint = false; 144 } 145 146 bool completelyClippedOut = false; 147 if (style()->hasBorderRadius()) { 148 LayoutRect borderRect = LayoutRect(adjustedPaintOffset, size()); 149 150 if (borderRect.isEmpty()) 151 completelyClippedOut = true; 152 else { 153 // Push a clip if we have a border radius, since we want to round the foreground content that gets painted. 154 paintInfo.context->save(); 155 RoundedRect roundedInnerRect = style()->getRoundedInnerBorderFor(paintRect, 156 paddingTop() + borderTop(), paddingBottom() + borderBottom(), paddingLeft() + borderLeft(), paddingRight() + borderRight(), true, true); 157 clipRoundedInnerRect(paintInfo.context, paintRect, roundedInnerRect); 158 } 159 } 160 161 if (!completelyClippedOut) { 162 if (paintInfo.phase == PaintPhaseClippingMask) { 163 paintClippingMask(paintInfo, adjustedPaintOffset); 164 } else { 165 paintReplaced(paintInfo, adjustedPaintOffset); 166 } 167 168 if (style()->hasBorderRadius()) 169 paintInfo.context->restore(); 170 } 171 172 // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of 173 // surrounding content. 174 if (drawSelectionTint) { 175 LayoutRect selectionPaintingRect = localSelectionRect(); 176 selectionPaintingRect.moveBy(adjustedPaintOffset); 177 paintInfo.context->fillRect(pixelSnappedIntRect(selectionPaintingRect), selectionBackgroundColor()); 178 } 179 } 180 181 bool RenderReplaced::shouldPaint(PaintInfo& paintInfo, const LayoutPoint& paintOffset) 182 { 183 if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseOutline && paintInfo.phase != PaintPhaseSelfOutline 184 && paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseMask && paintInfo.phase != PaintPhaseClippingMask) 185 return false; 186 187 if (!paintInfo.shouldPaintWithinRoot(this)) 188 return false; 189 190 // if we're invisible or haven't received a layout yet, then just bail. 191 if (style()->visibility() != VISIBLE) 192 return false; 193 194 LayoutPoint adjustedPaintOffset = paintOffset + location(); 195 196 // Early exit if the element touches the edges. 197 LayoutUnit top = adjustedPaintOffset.y() + visualOverflowRect().y(); 198 LayoutUnit bottom = adjustedPaintOffset.y() + visualOverflowRect().maxY(); 199 if (isSelected() && m_inlineBoxWrapper) { 200 LayoutUnit selTop = paintOffset.y() + m_inlineBoxWrapper->root()->selectionTop(); 201 LayoutUnit selBottom = paintOffset.y() + selTop + m_inlineBoxWrapper->root()->selectionHeight(); 202 top = min(selTop, top); 203 bottom = max(selBottom, bottom); 204 } 205 206 LayoutRect localRepaintRect = paintInfo.rect; 207 localRepaintRect.inflate(maximalOutlineSize(paintInfo.phase)); 208 if (adjustedPaintOffset.x() + visualOverflowRect().x() >= localRepaintRect.maxX() || adjustedPaintOffset.x() + visualOverflowRect().maxX() <= localRepaintRect.x()) 209 return false; 210 211 if (top >= localRepaintRect.maxY() || bottom <= localRepaintRect.y()) 212 return false; 213 214 return true; 215 } 216 217 static inline RenderBlock* firstContainingBlockWithLogicalWidth(const RenderReplaced* replaced) 218 { 219 // We have to lookup the containing block, which has an explicit width, which must not be equal to our direct containing block. 220 // If the embedded document appears _after_ we performed the initial layout, our intrinsic size is 300x150. If our containing 221 // block doesn't provide an explicit width, it's set to the 300 default, coming from the initial layout run. 222 RenderBlock* containingBlock = replaced->containingBlock(); 223 if (!containingBlock) 224 return 0; 225 226 for (; !containingBlock->isRenderView() && !containingBlock->isBody(); containingBlock = containingBlock->containingBlock()) { 227 if (containingBlock->style()->logicalWidth().isSpecified()) 228 return containingBlock; 229 } 230 231 return 0; 232 } 233 234 bool RenderReplaced::hasReplacedLogicalWidth() const 235 { 236 if (style()->logicalWidth().isSpecified()) 237 return true; 238 239 if (style()->logicalWidth().isAuto()) 240 return false; 241 242 return firstContainingBlockWithLogicalWidth(this); 243 } 244 245 bool RenderReplaced::hasReplacedLogicalHeight() const 246 { 247 if (style()->logicalHeight().isAuto()) 248 return false; 249 250 if (style()->logicalHeight().isSpecified()) { 251 if (hasAutoHeightOrContainingBlockWithAutoHeight()) 252 return false; 253 return true; 254 } 255 256 if (style()->logicalHeight().isIntrinsic()) 257 return true; 258 259 return false; 260 } 261 262 bool RenderReplaced::needsPreferredWidthsRecalculation() const 263 { 264 // If the height is a percentage and the width is auto, then the containingBlocks's height changing can cause 265 // this node to change it's preferred width because it maintains aspect ratio. 266 return hasRelativeLogicalHeight() && style()->logicalWidth().isAuto() && !hasAutoHeightOrContainingBlockWithAutoHeight(); 267 } 268 269 static inline bool rendererHasAspectRatio(const RenderObject* renderer) 270 { 271 ASSERT(renderer); 272 return renderer->isImage() || renderer->isCanvas() || renderer->isVideo(); 273 } 274 275 void RenderReplaced::computeAspectRatioInformationForRenderBox(RenderBox* contentRenderer, FloatSize& constrainedSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const 276 { 277 FloatSize intrinsicSize; 278 if (contentRenderer) { 279 contentRenderer->computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize); 280 if (intrinsicRatio) 281 ASSERT(!isPercentageIntrinsicSize); 282 283 // Handle zoom & vertical writing modes here, as the embedded document doesn't know about them. 284 if (!isPercentageIntrinsicSize) { 285 intrinsicSize.scale(style()->effectiveZoom()); 286 if (isRenderImage()) 287 intrinsicSize.scale(toRenderImage(this)->imageDevicePixelRatio()); 288 } 289 290 if (rendererHasAspectRatio(this) && isPercentageIntrinsicSize) 291 intrinsicRatio = 1; 292 293 // Update our intrinsic size to match what the content renderer has computed, so that when we 294 // constrain the size below, the correct intrinsic size will be obtained for comparison against 295 // min and max widths. 296 if (intrinsicRatio && !isPercentageIntrinsicSize && !intrinsicSize.isEmpty()) 297 m_intrinsicSize = LayoutSize(intrinsicSize); 298 299 if (!isHorizontalWritingMode()) { 300 if (intrinsicRatio) 301 intrinsicRatio = 1 / intrinsicRatio; 302 intrinsicSize = intrinsicSize.transposedSize(); 303 } 304 } else { 305 computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize); 306 if (intrinsicRatio) { 307 ASSERT(!isPercentageIntrinsicSize); 308 if (!intrinsicSize.isEmpty()) 309 m_intrinsicSize = LayoutSize(isHorizontalWritingMode() ? intrinsicSize : intrinsicSize.transposedSize()); 310 } 311 } 312 313 // Now constrain the intrinsic size along each axis according to minimum and maximum width/heights along the 314 // opposite axis. So for example a maximum width that shrinks our width will result in the height we compute here 315 // having to shrink in order to preserve the aspect ratio. Because we compute these values independently along 316 // each axis, the final returned size may in fact not preserve the aspect ratio. 317 // FIXME: In the long term, it might be better to just return this code more to the way it used to be before this 318 // function was added, since all it has done is make the code more unclear. 319 constrainedSize = intrinsicSize; 320 if (intrinsicRatio && !isPercentageIntrinsicSize && !intrinsicSize.isEmpty() && style()->logicalWidth().isAuto() && style()->logicalHeight().isAuto()) { 321 // We can't multiply or divide by 'intrinsicRatio' here, it breaks tests, like fast/images/zoomed-img-size.html, which 322 // can only be fixed once subpixel precision is available for things like intrinsicWidth/Height - which include zoom! 323 constrainedSize.setWidth(RenderBox::computeReplacedLogicalHeight() * intrinsicSize.width() / intrinsicSize.height()); 324 constrainedSize.setHeight(RenderBox::computeReplacedLogicalWidth() * intrinsicSize.height() / intrinsicSize.width()); 325 } 326 } 327 328 LayoutRect RenderReplaced::replacedContentRect(const LayoutSize* overriddenIntrinsicSize) const 329 { 330 LayoutRect contentRect = contentBoxRect(); 331 ObjectFit objectFit = style()->objectFit(); 332 333 if (objectFit == ObjectFitFill && style()->objectPosition() == RenderStyle::initialObjectPosition()) { 334 if (!isVideo() || RuntimeEnabledFeatures::objectFitPositionEnabled()) 335 return contentRect; 336 objectFit = ObjectFitContain; 337 } 338 339 LayoutSize intrinsicSize = overriddenIntrinsicSize ? *overriddenIntrinsicSize : this->intrinsicSize(); 340 if (!intrinsicSize.width() || !intrinsicSize.height()) 341 return contentRect; 342 343 LayoutRect finalRect = contentRect; 344 switch (objectFit) { 345 case ObjectFitContain: 346 case ObjectFitScaleDown: 347 case ObjectFitCover: 348 finalRect.setSize(finalRect.size().fitToAspectRatio(intrinsicSize, objectFit == ObjectFitCover ? AspectRatioFitGrow : AspectRatioFitShrink)); 349 if (objectFit != ObjectFitScaleDown || finalRect.width() <= intrinsicSize.width()) 350 break; 351 // fall through 352 case ObjectFitNone: 353 finalRect.setSize(intrinsicSize); 354 break; 355 case ObjectFitFill: 356 break; 357 default: 358 ASSERT_NOT_REACHED(); 359 } 360 361 LayoutUnit xOffset = minimumValueForLength(style()->objectPosition().x(), contentRect.width() - finalRect.width(), view()); 362 LayoutUnit yOffset = minimumValueForLength(style()->objectPosition().y(), contentRect.height() - finalRect.height(), view()); 363 finalRect.move(xOffset, yOffset); 364 365 return finalRect; 366 } 367 368 void RenderReplaced::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const 369 { 370 // If there's an embeddedContentBox() of a remote, referenced document available, this code-path should never be used. 371 ASSERT(!embeddedContentBox()); 372 isPercentageIntrinsicSize = false; 373 intrinsicSize = FloatSize(intrinsicLogicalWidth(), intrinsicLogicalHeight()); 374 375 // Figure out if we need to compute an intrinsic ratio. 376 if (intrinsicSize.isEmpty() || !rendererHasAspectRatio(this)) 377 return; 378 379 intrinsicRatio = intrinsicSize.width() / intrinsicSize.height(); 380 } 381 382 LayoutUnit RenderReplaced::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const 383 { 384 if (style()->logicalWidth().isSpecified() || style()->logicalWidth().isIntrinsic()) 385 return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(style()->logicalWidth()), shouldComputePreferred); 386 387 RenderBox* contentRenderer = embeddedContentBox(); 388 389 // 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width 390 bool isPercentageIntrinsicSize = false; 391 double intrinsicRatio = 0; 392 FloatSize constrainedSize; 393 computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio, isPercentageIntrinsicSize); 394 395 if (style()->logicalWidth().isAuto()) { 396 bool heightIsAuto = style()->logicalHeight().isAuto(); 397 bool hasIntrinsicWidth = !isPercentageIntrinsicSize && constrainedSize.width() > 0; 398 399 // 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'. 400 if (heightIsAuto && hasIntrinsicWidth) 401 return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred); 402 403 bool hasIntrinsicHeight = !isPercentageIntrinsicSize && constrainedSize.height() > 0; 404 if (intrinsicRatio || isPercentageIntrinsicSize) { 405 // 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; 406 // 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 407 // of 'width' is: (used height) * (intrinsic ratio) 408 if (intrinsicRatio && ((heightIsAuto && !hasIntrinsicWidth && hasIntrinsicHeight) || !heightIsAuto)) { 409 LayoutUnit logicalHeight = computeReplacedLogicalHeight(); 410 return computeReplacedLogicalWidthRespectingMinMaxWidth(roundToInt(round(logicalHeight * intrinsicRatio)), shouldComputePreferred); 411 } 412 413 // 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 414 // '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 415 // the used value of 'width' is calculated from the constraint equation used for block-level, non-replaced elements in normal flow. 416 if (heightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight) { 417 // The aforementioned 'constraint equation' used for block-level, non-replaced elements in normal flow: 418 // 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block 419 LayoutUnit logicalWidth; 420 if (RenderBlock* blockWithWidth = firstContainingBlockWithLogicalWidth(this)) 421 logicalWidth = blockWithWidth->computeReplacedLogicalWidthRespectingMinMaxWidth(blockWithWidth->computeReplacedLogicalWidthUsing(blockWithWidth->style()->logicalWidth()), shouldComputePreferred); 422 else 423 logicalWidth = containingBlock()->availableLogicalWidth(); 424 425 // This solves above equation for 'width' (== logicalWidth). 426 LayoutUnit marginStart = minimumValueForLength(style()->marginStart(), logicalWidth); 427 LayoutUnit marginEnd = minimumValueForLength(style()->marginEnd(), logicalWidth); 428 logicalWidth = max<LayoutUnit>(0, logicalWidth - (marginStart + marginEnd + (width() - clientWidth()))); 429 if (isPercentageIntrinsicSize) 430 logicalWidth = logicalWidth * constrainedSize.width() / 100; 431 return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth, shouldComputePreferred); 432 } 433 } 434 435 // 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'. 436 if (hasIntrinsicWidth) 437 return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred); 438 439 // 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 440 // 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. 441 // Note: We fall through and instead return intrinsicLogicalWidth() here - to preserve existing WebKit behavior, which might or might not be correct, or desired. 442 // 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) 443 // has no intrinsic size, which is wrong per CSS 2.1, but matches our behavior since a long time. 444 } 445 446 return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), shouldComputePreferred); 447 } 448 449 LayoutUnit RenderReplaced::computeReplacedLogicalHeight() const 450 { 451 // 10.5 Content height: the 'height' property: http://www.w3.org/TR/CSS21/visudet.html#propdef-height 452 if (hasReplacedLogicalHeight()) 453 return computeReplacedLogicalHeightRespectingMinMaxHeight(computeReplacedLogicalHeightUsing(style()->logicalHeight())); 454 455 RenderBox* contentRenderer = embeddedContentBox(); 456 457 // 10.6.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-height 458 bool isPercentageIntrinsicSize = false; 459 double intrinsicRatio = 0; 460 FloatSize constrainedSize; 461 computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio, isPercentageIntrinsicSize); 462 463 bool widthIsAuto = style()->logicalWidth().isAuto(); 464 bool hasIntrinsicHeight = !isPercentageIntrinsicSize && constrainedSize.height() > 0; 465 466 // 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'. 467 if (widthIsAuto && hasIntrinsicHeight) 468 return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height()); 469 470 // Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic ratio then the used value of 'height' is: 471 // (used width) / (intrinsic ratio) 472 if (intrinsicRatio) 473 return computeReplacedLogicalHeightRespectingMinMaxHeight(roundToInt(round(availableLogicalWidth() / intrinsicRatio))); 474 475 // 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'. 476 if (hasIntrinsicHeight) 477 return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height()); 478 479 // 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 480 // 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. 481 return computeReplacedLogicalHeightRespectingMinMaxHeight(intrinsicLogicalHeight()); 482 } 483 484 void RenderReplaced::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const 485 { 486 minLogicalWidth = maxLogicalWidth = intrinsicLogicalWidth(); 487 } 488 489 void RenderReplaced::computePreferredLogicalWidths() 490 { 491 ASSERT(preferredLogicalWidthsDirty()); 492 493 // We cannot resolve any percent logical width here as the available logical 494 // width may not be set on our containing block. 495 if (style()->logicalWidth().isPercent()) 496 computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth); 497 else 498 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeReplacedLogicalWidth(ComputePreferred); 499 500 RenderStyle* styleToUse = style(); 501 if (styleToUse->logicalWidth().isPercent() || styleToUse->logicalMaxWidth().isPercent() || hasRelativeIntrinsicLogicalWidth()) 502 m_minPreferredLogicalWidth = 0; 503 504 if (styleToUse->logicalMinWidth().isFixed() && styleToUse->logicalMinWidth().value() > 0) { 505 m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value())); 506 m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value())); 507 } 508 509 if (styleToUse->logicalMaxWidth().isFixed()) { 510 m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value())); 511 m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value())); 512 } 513 514 LayoutUnit borderAndPadding = borderAndPaddingLogicalWidth(); 515 m_minPreferredLogicalWidth += borderAndPadding; 516 m_maxPreferredLogicalWidth += borderAndPadding; 517 518 clearPreferredLogicalWidthsDirty(); 519 } 520 521 PositionWithAffinity RenderReplaced::positionForPoint(const LayoutPoint& point) 522 { 523 // FIXME: This code is buggy if the replaced element is relative positioned. 524 InlineBox* box = inlineBoxWrapper(); 525 RootInlineBox* rootBox = box ? box->root() : 0; 526 527 LayoutUnit top = rootBox ? rootBox->selectionTop() : logicalTop(); 528 LayoutUnit bottom = rootBox ? rootBox->selectionBottom() : logicalBottom(); 529 530 LayoutUnit blockDirectionPosition = isHorizontalWritingMode() ? point.y() + y() : point.x() + x(); 531 LayoutUnit lineDirectionPosition = isHorizontalWritingMode() ? point.x() + x() : point.y() + y(); 532 533 if (blockDirectionPosition < top) 534 return createPositionWithAffinity(caretMinOffset(), DOWNSTREAM); // coordinates are above 535 536 if (blockDirectionPosition >= bottom) 537 return createPositionWithAffinity(caretMaxOffset(), DOWNSTREAM); // coordinates are below 538 539 if (node()) { 540 if (lineDirectionPosition <= logicalLeft() + (logicalWidth() / 2)) 541 return createPositionWithAffinity(0, DOWNSTREAM); 542 return createPositionWithAffinity(1, DOWNSTREAM); 543 } 544 545 return RenderBox::positionForPoint(point); 546 } 547 548 LayoutRect RenderReplaced::selectionRectForRepaint(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent) 549 { 550 ASSERT(!needsLayout()); 551 552 if (!isSelected()) 553 return LayoutRect(); 554 555 LayoutRect rect = localSelectionRect(); 556 if (clipToVisibleContent) 557 computeRectForRepaint(repaintContainer, rect); 558 else 559 rect = localToContainerQuad(FloatRect(rect), repaintContainer).enclosingBoundingBox(); 560 561 return rect; 562 } 563 564 LayoutRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const 565 { 566 if (checkWhetherSelected && !isSelected()) 567 return LayoutRect(); 568 569 if (!m_inlineBoxWrapper) 570 // We're a block-level replaced element. Just return our own dimensions. 571 return LayoutRect(LayoutPoint(), size()); 572 573 RootInlineBox* root = m_inlineBoxWrapper->root(); 574 LayoutUnit newLogicalTop = root->block()->style()->isFlippedBlocksWritingMode() ? m_inlineBoxWrapper->logicalBottom() - root->selectionBottom() : root->selectionTop() - m_inlineBoxWrapper->logicalTop(); 575 if (root->block()->style()->isHorizontalWritingMode()) 576 return LayoutRect(0, newLogicalTop, width(), root->selectionHeight()); 577 return LayoutRect(newLogicalTop, 0, root->selectionHeight(), height()); 578 } 579 580 void RenderReplaced::setSelectionState(SelectionState state) 581 { 582 // The selection state for our containing block hierarchy is updated by the base class call. 583 RenderBox::setSelectionState(state); 584 585 if (m_inlineBoxWrapper && canUpdateSelectionOnRootLineBoxes()) 586 if (RootInlineBox* root = m_inlineBoxWrapper->root()) 587 root->setHasSelectedChildren(isSelected()); 588 } 589 590 bool RenderReplaced::isSelected() const 591 { 592 SelectionState s = selectionState(); 593 if (s == SelectionNone) 594 return false; 595 if (s == SelectionInside) 596 return true; 597 598 int selectionStart, selectionEnd; 599 selectionStartEnd(selectionStart, selectionEnd); 600 if (s == SelectionStart) 601 return selectionStart == 0; 602 603 int end = node()->hasChildNodes() ? node()->childNodeCount() : 1; 604 if (s == SelectionEnd) 605 return selectionEnd == end; 606 if (s == SelectionBoth) 607 return selectionStart == 0 && selectionEnd == end; 608 609 ASSERT(0); 610 return false; 611 } 612 613 LayoutRect RenderReplaced::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const 614 { 615 if (style()->visibility() != VISIBLE && !enclosingLayer()->hasVisibleContent()) 616 return LayoutRect(); 617 618 // The selectionRect can project outside of the overflowRect, so take their union 619 // for repainting to avoid selection painting glitches. 620 LayoutRect r = unionRect(localSelectionRect(false), visualOverflowRect()); 621 622 RenderView* v = view(); 623 if (v) { 624 // FIXME: layoutDelta needs to be applied in parts before/after transforms and 625 // repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308 626 r.move(v->layoutDelta()); 627 } 628 629 if (style()) { 630 if (v) 631 r.inflate(style()->outlineSize()); 632 } 633 computeRectForRepaint(repaintContainer, r); 634 return r; 635 } 636 637 } 638
