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 "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
RenderReplaced(Element * element)44 RenderReplaced::RenderReplaced(Element* element)
45 : RenderBox(element)
46 , m_intrinsicSize(cDefaultWidth, cDefaultHeight)
47 {
48 setReplaced(true);
49 }
50
RenderReplaced(Element * element,const LayoutSize & intrinsicSize)51 RenderReplaced::RenderReplaced(Element* element, const LayoutSize& intrinsicSize)
52 : RenderBox(element)
53 , m_intrinsicSize(intrinsicSize)
54 {
55 setReplaced(true);
56 }
57
~RenderReplaced()58 RenderReplaced::~RenderReplaced()
59 {
60 }
61
willBeDestroyed()62 void RenderReplaced::willBeDestroyed()
63 {
64 if (!documentBeingDestroyed() && parent())
65 parent()->dirtyLinesFromChangedChild(this);
66
67 RenderBox::willBeDestroyed();
68 }
69
styleDidChange(StyleDifference diff,const RenderStyle * oldStyle)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
layout()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
intrinsicSizeChanged()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
paint(PaintInfo & paintInfo,const LayoutPoint & paintOffset)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
shouldPaint(PaintInfo & paintInfo,const LayoutPoint & paintOffset)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
firstContainingBlockWithLogicalWidth(const RenderReplaced * replaced)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
hasReplacedLogicalWidth() const234 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
hasReplacedLogicalHeight() const245 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
needsPreferredWidthsRecalculation() const262 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
rendererHasAspectRatio(const RenderObject * renderer)269 static inline bool rendererHasAspectRatio(const RenderObject* renderer)
270 {
271 ASSERT(renderer);
272 return renderer->isImage() || renderer->isCanvas() || renderer->isVideo();
273 }
274
computeAspectRatioInformationForRenderBox(RenderBox * contentRenderer,FloatSize & constrainedSize,double & intrinsicRatio,bool & isPercentageIntrinsicSize) const275 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
replacedContentRect(const LayoutSize * overriddenIntrinsicSize) const328 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
computeIntrinsicRatioInformation(FloatSize & intrinsicSize,double & intrinsicRatio,bool & isPercentageIntrinsicSize) const368 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
computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const382 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
computeReplacedLogicalHeight() const449 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
computeIntrinsicLogicalWidths(LayoutUnit & minLogicalWidth,LayoutUnit & maxLogicalWidth) const484 void RenderReplaced::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
485 {
486 minLogicalWidth = maxLogicalWidth = intrinsicLogicalWidth();
487 }
488
computePreferredLogicalWidths()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
positionForPoint(const LayoutPoint & point)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
selectionRectForRepaint(const RenderLayerModelObject * repaintContainer,bool clipToVisibleContent)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
localSelectionRect(bool checkWhetherSelected) const564 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
setSelectionState(SelectionState state)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
isSelected() const590 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
clippedOverflowRectForRepaint(const RenderLayerModelObject * repaintContainer) const613 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