1/*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2000 Dirk Mueller (mueller@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 "RenderReplaced.h"
26
27#include "DocumentMarkerController.h"
28#include "FloatRoundedRect.h"
29#include "Frame.h"
30#include "GraphicsContext.h"
31#include "HTMLElement.h"
32#include "InlineElementBox.h"
33#include "LayoutRepainter.h"
34#include "RenderBlock.h"
35#include "RenderFragmentedFlow.h"
36#include "RenderImage.h"
37#include "RenderLayer.h"
38#include "RenderTheme.h"
39#include "RenderView.h"
40#include "RenderedDocumentMarker.h"
41#include "VisiblePosition.h"
42#include <wtf/IsoMallocInlines.h>
43#include <wtf/StackStats.h>
44
45namespace WebCore {
46
47WTF_MAKE_ISO_ALLOCATED_IMPL(RenderReplaced);
48
49const int cDefaultWidth = 300;
50const int cDefaultHeight = 150;
51
52RenderReplaced::RenderReplaced(Element& element, RenderStyle&& style)
53 : RenderBox(element, WTFMove(style), RenderReplacedFlag)
54 , m_intrinsicSize(cDefaultWidth, cDefaultHeight)
55{
56 setReplaced(true);
57}
58
59RenderReplaced::RenderReplaced(Element& element, RenderStyle&& style, const LayoutSize& intrinsicSize)
60 : RenderBox(element, WTFMove(style), RenderReplacedFlag)
61 , m_intrinsicSize(intrinsicSize)
62{
63 setReplaced(true);
64}
65
66RenderReplaced::RenderReplaced(Document& document, RenderStyle&& style, const LayoutSize& intrinsicSize)
67 : RenderBox(document, WTFMove(style), RenderReplacedFlag)
68 , m_intrinsicSize(intrinsicSize)
69{
70 setReplaced(true);
71}
72
73RenderReplaced::~RenderReplaced() = default;
74
75void RenderReplaced::willBeDestroyed()
76{
77 if (!renderTreeBeingDestroyed() && parent())
78 parent()->dirtyLinesFromChangedChild(*this);
79
80 RenderBox::willBeDestroyed();
81}
82
83void RenderReplaced::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
84{
85 RenderBox::styleDidChange(diff, oldStyle);
86
87 bool hadStyle = (oldStyle != 0);
88 float oldZoom = hadStyle ? oldStyle->effectiveZoom() : RenderStyle::initialZoom();
89 if (style().effectiveZoom() != oldZoom)
90 intrinsicSizeChanged();
91}
92
93void RenderReplaced::layout()
94{
95 StackStats::LayoutCheckPoint layoutCheckPoint;
96 ASSERT(needsLayout());
97
98 LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
99
100 setHeight(minimumReplacedHeight());
101
102 updateLogicalWidth();
103 updateLogicalHeight();
104
105 // Now that we've calculated our preferred layout, we check to see
106 // if we should further constrain sizing to the intrinsic aspect ratio.
107 if (style().aspectRatioType() == AspectRatioType::FromIntrinsic && !m_intrinsicSize.isEmpty()) {
108 float aspectRatio = m_intrinsicSize.aspectRatio();
109 LayoutSize frameSize = size();
110 float frameAspectRatio = frameSize.aspectRatio();
111 if (frameAspectRatio < aspectRatio)
112 setHeight(computeReplacedLogicalHeightRespectingMinMaxHeight(frameSize.height() * frameAspectRatio / aspectRatio));
113 else if (frameAspectRatio > aspectRatio)
114 setWidth(computeReplacedLogicalWidthRespectingMinMaxWidth(frameSize.width() * aspectRatio / frameAspectRatio, ComputePreferred));
115 }
116
117 clearOverflow();
118 addVisualEffectOverflow();
119 updateLayerTransform();
120 invalidateBackgroundObscurationStatus();
121
122 repainter.repaintAfterLayout();
123 clearNeedsLayout();
124}
125
126void RenderReplaced::intrinsicSizeChanged()
127{
128 int scaledWidth = static_cast<int>(cDefaultWidth * style().effectiveZoom());
129 int scaledHeight = static_cast<int>(cDefaultHeight * style().effectiveZoom());
130 m_intrinsicSize = IntSize(scaledWidth, scaledHeight);
131 setNeedsLayoutAndPrefWidthsRecalc();
132}
133
134bool RenderReplaced::shouldDrawSelectionTint() const
135{
136 return selectionState() != SelectionNone && !document().printing();
137}
138
139inline static bool draggedContentContainsReplacedElement(const Vector<RenderedDocumentMarker*>& markers, const Element& element)
140{
141 if (markers.isEmpty())
142 return false;
143
144 for (auto* marker : markers) {
145 auto& draggedContentData = WTF::get<DocumentMarker::DraggedContentData>(marker->data());
146 if (draggedContentData.targetNode == &element)
147 return true;
148 }
149
150 return false;
151}
152
153void RenderReplaced::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
154{
155 if (!shouldPaint(paintInfo, paintOffset))
156 return;
157
158#ifndef NDEBUG
159 SetLayoutNeededForbiddenScope scope(this);
160#endif
161
162 GraphicsContextStateSaver savedGraphicsContext(paintInfo.context(), false);
163 if (element() && element()->parentOrShadowHostElement()) {
164 auto* parentContainer = element()->parentOrShadowHostElement();
165 ASSERT(parentContainer);
166 if (draggedContentContainsReplacedElement(document().markers().markersFor(*parentContainer, DocumentMarker::DraggedContent), *element())) {
167 savedGraphicsContext.save();
168 paintInfo.context().setAlpha(0.25);
169 }
170 }
171
172 LayoutPoint adjustedPaintOffset = paintOffset + location();
173
174 if (hasVisibleBoxDecorations() && paintInfo.phase == PaintPhase::Foreground)
175 paintBoxDecorations(paintInfo, adjustedPaintOffset);
176
177 if (paintInfo.phase == PaintPhase::Mask) {
178 paintMask(paintInfo, adjustedPaintOffset);
179 return;
180 }
181
182 LayoutRect paintRect = LayoutRect(adjustedPaintOffset, size());
183 if (paintInfo.phase == PaintPhase::Outline || paintInfo.phase == PaintPhase::SelfOutline) {
184 if (style().outlineWidth())
185 paintOutline(paintInfo, paintRect);
186 return;
187 }
188
189 if (paintInfo.phase != PaintPhase::Foreground && paintInfo.phase != PaintPhase::Selection)
190 return;
191
192 if (!paintInfo.shouldPaintWithinRoot(*this))
193 return;
194
195 bool drawSelectionTint = shouldDrawSelectionTint();
196 if (paintInfo.phase == PaintPhase::Selection) {
197 if (selectionState() == SelectionNone)
198 return;
199 drawSelectionTint = false;
200 }
201
202 bool completelyClippedOut = false;
203 if (style().hasBorderRadius()) {
204 LayoutRect borderRect = LayoutRect(adjustedPaintOffset, size());
205
206 if (borderRect.isEmpty())
207 completelyClippedOut = true;
208 else {
209 // Push a clip if we have a border radius, since we want to round the foreground content that gets painted.
210 paintInfo.context().save();
211 FloatRoundedRect roundedInnerRect = FloatRoundedRect(style().getRoundedInnerBorderFor(paintRect,
212 paddingTop() + borderTop(), paddingBottom() + borderBottom(), paddingLeft() + borderLeft(), paddingRight() + borderRight(), true, true));
213 clipRoundedInnerRect(paintInfo.context(), paintRect, roundedInnerRect);
214 }
215 }
216
217 if (!completelyClippedOut) {
218 paintReplaced(paintInfo, adjustedPaintOffset);
219
220 if (style().hasBorderRadius())
221 paintInfo.context().restore();
222 }
223
224 // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of
225 // surrounding content.
226 if (drawSelectionTint) {
227 LayoutRect selectionPaintingRect = localSelectionRect();
228 selectionPaintingRect.moveBy(adjustedPaintOffset);
229 paintInfo.context().fillRect(snappedIntRect(selectionPaintingRect), selectionBackgroundColor());
230 }
231}
232
233bool RenderReplaced::shouldPaint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
234{
235 if ((paintInfo.paintBehavior.contains(PaintBehavior::ExcludeSelection)) && isSelected())
236 return false;
237
238 if (paintInfo.phase != PaintPhase::Foreground
239 && paintInfo.phase != PaintPhase::Outline
240 && paintInfo.phase != PaintPhase::SelfOutline
241 && paintInfo.phase != PaintPhase::Selection
242 && paintInfo.phase != PaintPhase::Mask)
243 return false;
244
245 if (!paintInfo.shouldPaintWithinRoot(*this))
246 return false;
247
248 // if we're invisible or haven't received a layout yet, then just bail.
249 if (style().visibility() != Visibility::Visible)
250 return false;
251
252 LayoutPoint adjustedPaintOffset = paintOffset + location();
253
254 // Early exit if the element touches the edges.
255 LayoutUnit top = adjustedPaintOffset.y() + visualOverflowRect().y();
256 LayoutUnit bottom = adjustedPaintOffset.y() + visualOverflowRect().maxY();
257 if (isSelected() && m_inlineBoxWrapper) {
258 const RootInlineBox& rootBox = m_inlineBoxWrapper->root();
259 LayoutUnit selTop = paintOffset.y() + rootBox.selectionTop();
260 LayoutUnit selBottom = paintOffset.y() + selTop + rootBox.selectionHeight();
261 top = std::min(selTop, top);
262 bottom = std::max(selBottom, bottom);
263 }
264
265 LayoutRect localRepaintRect = paintInfo.rect;
266 if (adjustedPaintOffset.x() + visualOverflowRect().x() >= localRepaintRect.maxX() || adjustedPaintOffset.x() + visualOverflowRect().maxX() <= localRepaintRect.x())
267 return false;
268
269 if (top >= localRepaintRect.maxY() || bottom <= localRepaintRect.y())
270 return false;
271
272 return true;
273}
274
275static inline RenderBlock* firstContainingBlockWithLogicalWidth(const RenderReplaced* replaced)
276{
277 // We have to lookup the containing block, which has an explicit width, which must not be equal to our direct containing block.
278 // If the embedded document appears _after_ we performed the initial layout, our intrinsic size is 300x150. If our containing
279 // block doesn't provide an explicit width, it's set to the 300 default, coming from the initial layout run.
280 RenderBlock* containingBlock = replaced->containingBlock();
281 if (!containingBlock)
282 return 0;
283
284 for (; containingBlock && !is<RenderView>(*containingBlock) && !containingBlock->isBody(); containingBlock = containingBlock->containingBlock()) {
285 if (containingBlock->style().logicalWidth().isSpecified())
286 return containingBlock;
287 }
288
289 return 0;
290}
291
292bool RenderReplaced::hasReplacedLogicalWidth() const
293{
294 if (style().logicalWidth().isSpecified())
295 return true;
296
297 if (style().logicalWidth().isAuto())
298 return false;
299
300 return firstContainingBlockWithLogicalWidth(this);
301}
302
303bool RenderReplaced::hasReplacedLogicalHeight() const
304{
305 if (style().logicalHeight().isAuto())
306 return false;
307
308 if (style().logicalHeight().isSpecified()) {
309 if (hasAutoHeightOrContainingBlockWithAutoHeight())
310 return false;
311 return true;
312 }
313
314 if (style().logicalHeight().isIntrinsic())
315 return true;
316
317 return false;
318}
319
320bool RenderReplaced::setNeedsLayoutIfNeededAfterIntrinsicSizeChange()
321{
322 setPreferredLogicalWidthsDirty(true);
323
324 // If the actual area occupied by the image has changed and it is not constrained by style then a layout is required.
325 bool imageSizeIsConstrained = style().logicalWidth().isSpecified() && style().logicalHeight().isSpecified();
326
327 // FIXME: We only need to recompute the containing block's preferred size
328 // if the containing block's size depends on the image's size (i.e., the container uses shrink-to-fit sizing).
329 // There's no easy way to detect that shrink-to-fit is needed, always force a layout.
330 bool containingBlockNeedsToRecomputePreferredSize =
331 style().logicalWidth().isPercentOrCalculated()
332 || style().logicalMaxWidth().isPercentOrCalculated()
333 || style().logicalMinWidth().isPercentOrCalculated();
334
335 bool layoutSizeDependsOnIntrinsicSize = style().aspectRatioType() == AspectRatioType::FromIntrinsic;
336
337 if (!imageSizeIsConstrained || containingBlockNeedsToRecomputePreferredSize || layoutSizeDependsOnIntrinsicSize) {
338 setNeedsLayout();
339 return true;
340 }
341
342 return false;
343}
344
345void RenderReplaced::computeAspectRatioInformationForRenderBox(RenderBox* contentRenderer, FloatSize& constrainedSize, double& intrinsicRatio) const
346{
347 FloatSize intrinsicSize;
348 if (contentRenderer) {
349 contentRenderer->computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio);
350
351 // Handle zoom & vertical writing modes here, as the embedded document doesn't know about them.
352 intrinsicSize.scale(style().effectiveZoom());
353
354 if (is<RenderImage>(*this))
355 intrinsicSize.scale(downcast<RenderImage>(*this).imageDevicePixelRatio());
356
357 // Update our intrinsic size to match what the content renderer has computed, so that when we
358 // constrain the size below, the correct intrinsic size will be obtained for comparison against
359 // min and max widths.
360 if (intrinsicRatio && !intrinsicSize.isEmpty())
361 m_intrinsicSize = LayoutSize(intrinsicSize);
362
363 if (!isHorizontalWritingMode()) {
364 if (intrinsicRatio)
365 intrinsicRatio = 1 / intrinsicRatio;
366 intrinsicSize = intrinsicSize.transposedSize();
367 }
368 } else {
369 computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio);
370 if (intrinsicRatio && !intrinsicSize.isEmpty())
371 m_intrinsicSize = LayoutSize(isHorizontalWritingMode() ? intrinsicSize : intrinsicSize.transposedSize());
372 }
373
374 // Now constrain the intrinsic size along each axis according to minimum and maximum width/heights along the
375 // opposite axis. So for example a maximum width that shrinks our width will result in the height we compute here
376 // having to shrink in order to preserve the aspect ratio. Because we compute these values independently along
377 // each axis, the final returned size may in fact not preserve the aspect ratio.
378 // FIXME: In the long term, it might be better to just return this code more to the way it used to be before this
379 // function was added, since all it has done is make the code more unclear.
380 constrainedSize = intrinsicSize;
381 if (intrinsicRatio && !intrinsicSize.isEmpty() && style().logicalWidth().isAuto() && style().logicalHeight().isAuto()) {
382 // We can't multiply or divide by 'intrinsicRatio' here, it breaks tests, like fast/images/zoomed-img-size.html, which
383 // can only be fixed once subpixel precision is available for things like intrinsicWidth/Height - which include zoom!
384 constrainedSize.setWidth(RenderBox::computeReplacedLogicalHeight() * intrinsicSize.width() / intrinsicSize.height());
385 constrainedSize.setHeight(RenderBox::computeReplacedLogicalWidth() * intrinsicSize.height() / intrinsicSize.width());
386 }
387}
388
389LayoutRect RenderReplaced::replacedContentRect(const LayoutSize& intrinsicSize) const
390{
391 LayoutRect contentRect = contentBoxRect();
392 if (intrinsicSize.isEmpty())
393 return contentRect;
394
395 ObjectFit objectFit = style().objectFit();
396
397 LayoutRect finalRect = contentRect;
398 switch (objectFit) {
399 case ObjectFit::Contain:
400 case ObjectFit::ScaleDown:
401 case ObjectFit::Cover:
402 finalRect.setSize(finalRect.size().fitToAspectRatio(intrinsicSize, objectFit == ObjectFit::Cover ? AspectRatioFitGrow : AspectRatioFitShrink));
403 if (objectFit != ObjectFit::ScaleDown || finalRect.width() <= intrinsicSize.width())
404 break;
405 FALLTHROUGH;
406 case ObjectFit::None:
407 finalRect.setSize(intrinsicSize);
408 break;
409 case ObjectFit::Fill:
410 break;
411 }
412
413 LengthPoint objectPosition = style().objectPosition();
414
415 LayoutUnit xOffset = minimumValueForLength(objectPosition.x(), contentRect.width() - finalRect.width());
416 LayoutUnit yOffset = minimumValueForLength(objectPosition.y(), contentRect.height() - finalRect.height());
417
418 finalRect.move(xOffset, yOffset);
419
420 return finalRect;
421}
422
423void RenderReplaced::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio) const
424{
425 // If there's an embeddedContentBox() of a remote, referenced document available, this code-path should never be used.
426 ASSERT(!embeddedContentBox());
427 intrinsicSize = FloatSize(intrinsicLogicalWidth(), intrinsicLogicalHeight());
428
429 // Figure out if we need to compute an intrinsic ratio.
430 if (intrinsicSize.isEmpty() || !hasAspectRatio())
431 return;
432
433 intrinsicRatio = intrinsicSize.width() / intrinsicSize.height();
434}
435
436LayoutUnit RenderReplaced::computeConstrainedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const
437{
438 if (shouldComputePreferred == ComputePreferred)
439 return computeReplacedLogicalWidthRespectingMinMaxWidth(0_lu, ComputePreferred);
440
441 // The aforementioned 'constraint equation' used for block-level, non-replaced
442 // elements in normal flow:
443 // 'margin-left' + 'border-left-width' + 'padding-left' + 'width' +
444 // 'padding-right' + 'border-right-width' + 'margin-right' = width of
445 // containing block
446 LayoutUnit logicalWidth = containingBlock()->availableLogicalWidth();
447
448 // This solves above equation for 'width' (== logicalWidth).
449 LayoutUnit marginStart = minimumValueForLength(style().marginStart(), logicalWidth);
450 LayoutUnit marginEnd = minimumValueForLength(style().marginEnd(), logicalWidth);
451 logicalWidth = std::max(0_lu, (logicalWidth - (marginStart + marginEnd + (size().width() - clientWidth()))));
452 return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth, shouldComputePreferred);
453}
454
455LayoutUnit RenderReplaced::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const
456{
457 if (style().logicalWidth().isSpecified() || style().logicalWidth().isIntrinsic())
458 return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(MainOrPreferredSize, style().logicalWidth()), shouldComputePreferred);
459
460 RenderBox* contentRenderer = embeddedContentBox();
461
462 // 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width
463 double intrinsicRatio = 0;
464 FloatSize constrainedSize;
465 computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio);
466
467 if (style().logicalWidth().isAuto()) {
468 bool computedHeightIsAuto = style().logicalHeight().isAuto();
469 bool hasIntrinsicWidth = constrainedSize.width() > 0;
470
471 // 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'.
472 if (computedHeightIsAuto && hasIntrinsicWidth)
473 return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred);
474
475 bool hasIntrinsicHeight = constrainedSize.height() > 0;
476 if (intrinsicRatio) {
477 // 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;
478 // 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
479 // of 'width' is: (used height) * (intrinsic ratio)
480 if (intrinsicRatio && ((computedHeightIsAuto && !hasIntrinsicWidth && hasIntrinsicHeight) || !computedHeightIsAuto)) {
481 LayoutUnit estimatedUsedWidth = hasIntrinsicWidth ? LayoutUnit(constrainedSize.width()) : computeConstrainedLogicalWidth(shouldComputePreferred);
482 LayoutUnit logicalHeight = computeReplacedLogicalHeight(Optional<LayoutUnit>(estimatedUsedWidth));
483 return computeReplacedLogicalWidthRespectingMinMaxWidth(roundToInt(round(logicalHeight * intrinsicRatio)), shouldComputePreferred);
484 }
485
486
487 // If 'height' and 'width' both have computed values of 'auto' and the
488 // element has an intrinsic ratio but no intrinsic height or width, then
489 // the used value of 'width' is undefined in CSS 2.1. However, it is
490 // suggested that, if the containing block's width does not itself depend
491 // on the replaced element's width, then the used value of 'width' is
492 // calculated from the constraint equation used for block-level,
493 // non-replaced elements in normal flow.
494 if (computedHeightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight)
495 return computeConstrainedLogicalWidth(shouldComputePreferred);
496 }
497
498 // 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'.
499 if (hasIntrinsicWidth)
500 return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred);
501
502 // 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
503 // 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.
504 // Note: We fall through and instead return intrinsicLogicalWidth() here - to preserve existing WebKit behavior, which might or might not be correct, or desired.
505 // 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)
506 // has no intrinsic size, which is wrong per CSS 2.1, but matches our behavior since a long time.
507 }
508
509 return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), shouldComputePreferred);
510}
511
512LayoutUnit RenderReplaced::computeReplacedLogicalHeight(Optional<LayoutUnit> estimatedUsedWidth) const
513{
514 // 10.5 Content height: the 'height' property: http://www.w3.org/TR/CSS21/visudet.html#propdef-height
515 if (hasReplacedLogicalHeight())
516 return computeReplacedLogicalHeightRespectingMinMaxHeight(computeReplacedLogicalHeightUsing(MainOrPreferredSize, style().logicalHeight()));
517
518 RenderBox* contentRenderer = embeddedContentBox();
519
520 // 10.6.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-height
521 double intrinsicRatio = 0;
522 FloatSize constrainedSize;
523 computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio);
524
525 bool widthIsAuto = style().logicalWidth().isAuto();
526 bool hasIntrinsicHeight = constrainedSize.height() > 0;
527
528 // 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'.
529 if (widthIsAuto && hasIntrinsicHeight)
530 return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height());
531
532 // Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic ratio then the used value of 'height' is:
533 // (used width) / (intrinsic ratio)
534 if (intrinsicRatio) {
535 LayoutUnit usedWidth = estimatedUsedWidth ? estimatedUsedWidth.value() : availableLogicalWidth();
536 return computeReplacedLogicalHeightRespectingMinMaxHeight(roundToInt(round(usedWidth / intrinsicRatio)));
537 }
538
539 // 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'.
540 if (hasIntrinsicHeight)
541 return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height());
542
543 // 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
544 // 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.
545 return computeReplacedLogicalHeightRespectingMinMaxHeight(intrinsicLogicalHeight());
546}
547
548void RenderReplaced::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
549{
550 minLogicalWidth = maxLogicalWidth = intrinsicLogicalWidth();
551}
552
553void RenderReplaced::computePreferredLogicalWidths()
554{
555 ASSERT(preferredLogicalWidthsDirty());
556
557 // We cannot resolve any percent logical width here as the available logical
558 // width may not be set on our containing block.
559 if (style().logicalWidth().isPercentOrCalculated())
560 computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
561 else
562 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeReplacedLogicalWidth(ComputePreferred);
563
564 const RenderStyle& styleToUse = style();
565 if (styleToUse.logicalWidth().isPercentOrCalculated() || styleToUse.logicalMaxWidth().isPercentOrCalculated())
566 m_minPreferredLogicalWidth = 0;
567
568 if (styleToUse.logicalMinWidth().isFixed() && styleToUse.logicalMinWidth().value() > 0) {
569 m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMinWidth().value()));
570 m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMinWidth().value()));
571 }
572
573 if (styleToUse.logicalMaxWidth().isFixed()) {
574 m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMaxWidth().value()));
575 m_minPreferredLogicalWidth = std::min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse.logicalMaxWidth().value()));
576 }
577
578 LayoutUnit borderAndPadding = borderAndPaddingLogicalWidth();
579 m_minPreferredLogicalWidth += borderAndPadding;
580 m_maxPreferredLogicalWidth += borderAndPadding;
581
582 setPreferredLogicalWidthsDirty(false);
583}
584
585VisiblePosition RenderReplaced::positionForPoint(const LayoutPoint& point, const RenderFragmentContainer* fragment)
586{
587 // FIXME: This code is buggy if the replaced element is relative positioned.
588 InlineBox* box = inlineBoxWrapper();
589 const RootInlineBox* rootBox = box ? &box->root() : 0;
590
591 LayoutUnit top = rootBox ? rootBox->selectionTop() : logicalTop();
592 LayoutUnit bottom = rootBox ? rootBox->selectionBottom() : logicalBottom();
593
594 LayoutUnit blockDirectionPosition = isHorizontalWritingMode() ? point.y() + y() : point.x() + x();
595 LayoutUnit lineDirectionPosition = isHorizontalWritingMode() ? point.x() + x() : point.y() + y();
596
597 if (blockDirectionPosition < top)
598 return createVisiblePosition(caretMinOffset(), DOWNSTREAM); // coordinates are above
599
600 if (blockDirectionPosition >= bottom)
601 return createVisiblePosition(caretMaxOffset(), DOWNSTREAM); // coordinates are below
602
603 if (element()) {
604 if (lineDirectionPosition <= logicalLeft() + (logicalWidth() / 2))
605 return createVisiblePosition(0, DOWNSTREAM);
606 return createVisiblePosition(1, DOWNSTREAM);
607 }
608
609 return RenderBox::positionForPoint(point, fragment);
610}
611
612LayoutRect RenderReplaced::selectionRectForRepaint(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent)
613{
614 ASSERT(!needsLayout());
615
616 if (!isSelected())
617 return LayoutRect();
618
619 LayoutRect rect = localSelectionRect();
620 if (clipToVisibleContent)
621 return computeRectForRepaint(rect, repaintContainer);
622 return localToContainerQuad(FloatRect(rect), repaintContainer).enclosingBoundingBox();
623}
624
625LayoutRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const
626{
627 if (checkWhetherSelected && !isSelected())
628 return LayoutRect();
629
630 if (!m_inlineBoxWrapper)
631 // We're a block-level replaced element. Just return our own dimensions.
632 return LayoutRect(LayoutPoint(), size());
633
634 const RootInlineBox& rootBox = m_inlineBoxWrapper->root();
635 LayoutUnit newLogicalTop = rootBox.blockFlow().style().isFlippedBlocksWritingMode() ? m_inlineBoxWrapper->logicalBottom() - rootBox.selectionBottom() : rootBox.selectionTop() - m_inlineBoxWrapper->logicalTop();
636 if (rootBox.blockFlow().style().isHorizontalWritingMode())
637 return LayoutRect(0_lu, newLogicalTop, width(), rootBox.selectionHeight());
638 return LayoutRect(newLogicalTop, 0_lu, rootBox.selectionHeight(), height());
639}
640
641void RenderReplaced::setSelectionState(SelectionState state)
642{
643 // The selection state for our containing block hierarchy is updated by the base class call.
644 RenderBox::setSelectionState(state);
645
646 if (m_inlineBoxWrapper && canUpdateSelectionOnRootLineBoxes())
647 m_inlineBoxWrapper->root().setHasSelectedChildren(isSelected());
648}
649
650bool RenderReplaced::isSelected() const
651{
652 SelectionState state = selectionState();
653 if (state == SelectionNone)
654 return false;
655 if (state == SelectionInside)
656 return true;
657
658 auto selectionStart = view().selection().startPosition();
659 auto selectionEnd = view().selection().endPosition();
660 if (state == SelectionStart)
661 return !selectionStart;
662
663 unsigned end = element()->hasChildNodes() ? element()->countChildNodes() : 1;
664 if (state == SelectionEnd)
665 return selectionEnd == end;
666 if (state == SelectionBoth)
667 return !selectionStart && selectionEnd == end;
668 ASSERT_NOT_REACHED();
669 return false;
670}
671
672LayoutRect RenderReplaced::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const
673{
674 if (style().visibility() != Visibility::Visible && !enclosingLayer()->hasVisibleContent())
675 return LayoutRect();
676
677 // The selectionRect can project outside of the overflowRect, so take their union
678 // for repainting to avoid selection painting glitches.
679 LayoutRect r = unionRect(localSelectionRect(false), visualOverflowRect());
680 // FIXME: layoutDelta needs to be applied in parts before/after transforms and
681 // repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308
682 r.move(view().frameView().layoutContext().layoutDelta());
683 return computeRectForRepaint(r, repaintContainer);
684}
685
686}
687