2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 1999 Antti Koivisto (koivisto@kde.org)
4 * Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
26 #include "core/rendering/RenderBoxModelObject.h"
27 #include "core/rendering/RenderOverflow.h"
28 #include "core/rendering/shapes/ShapeOutsideInfo.h"
29 #include "platform/scroll/ScrollTypes.h"
33 class RenderBoxRegionInfo;
37 enum SizeType { MainOrPreferredSize, MinSize, MaxSize };
38 enum AvailableLogicalHeightType { ExcludeMarginBorderPadding, IncludeMarginBorderPadding };
39 enum OverlayScrollbarSizeRelevancy { IgnoreOverlayScrollbarSize, IncludeOverlayScrollbarSize };
41 enum ShouldComputePreferred { ComputeActual, ComputePreferred };
43 enum ContentsClipBehavior { ForceContentsClip, SkipContentsClipIfPossible };
45 enum ScrollOffsetClamping {
46 ScrollOffsetUnclamped,
50 class RenderBox : public RenderBoxModelObject {
52 explicit RenderBox(ContainerNode*);
55 // hasAutoZIndex only returns true if the element is positioned or a flex-item since
56 // position:static elements that are not flex-items get their z-index coerced to auto.
57 virtual LayerType layerTypeRequired() const OVERRIDE
59 if (isRoot() || isPositioned() || createsGroup() || hasClipPath() || hasTransform() || hasHiddenBackface() || hasReflection() || style()->specifiesColumns() || !style()->hasAutoZIndex())
61 if (hasOverflowClip())
62 return OverflowClipLayer;
67 virtual bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect) const OVERRIDE;
69 // Use this with caution! No type checking is done!
70 RenderBox* firstChildBox() const;
71 RenderBox* lastChildBox() const;
73 LayoutUnit x() const { return m_frameRect.x(); }
74 LayoutUnit y() const { return m_frameRect.y(); }
75 LayoutUnit width() const { return m_frameRect.width(); }
76 LayoutUnit height() const { return m_frameRect.height(); }
78 int pixelSnappedWidth() const { return m_frameRect.pixelSnappedWidth(); }
79 int pixelSnappedHeight() const { return m_frameRect.pixelSnappedHeight(); }
81 // These represent your location relative to your container as a physical offset.
82 // In layout related methods you almost always want the logical location (e.g. x() and y()).
83 LayoutUnit top() const { return topLeftLocation().y(); }
84 LayoutUnit left() const { return topLeftLocation().x(); }
86 void setX(LayoutUnit x) { m_frameRect.setX(x); }
87 void setY(LayoutUnit y) { m_frameRect.setY(y); }
88 void setWidth(LayoutUnit width) { m_frameRect.setWidth(width); }
89 void setHeight(LayoutUnit height) { m_frameRect.setHeight(height); }
91 LayoutUnit logicalLeft() const { return style()->isHorizontalWritingMode() ? x() : y(); }
92 LayoutUnit logicalRight() const { return logicalLeft() + logicalWidth(); }
93 LayoutUnit logicalTop() const { return style()->isHorizontalWritingMode() ? y() : x(); }
94 LayoutUnit logicalBottom() const { return logicalTop() + logicalHeight(); }
95 LayoutUnit logicalWidth() const { return style()->isHorizontalWritingMode() ? width() : height(); }
96 LayoutUnit logicalHeight() const { return style()->isHorizontalWritingMode() ? height() : width(); }
98 LayoutUnit constrainLogicalWidthInRegionByMinMax(LayoutUnit, LayoutUnit, RenderBlock*, RenderRegion* = 0) const;
99 LayoutUnit constrainLogicalHeightByMinMax(LayoutUnit logicalHeight, LayoutUnit intrinsicContentHeight) const;
100 LayoutUnit constrainContentBoxLogicalHeightByMinMax(LayoutUnit logicalHeight, LayoutUnit intrinsicContentHeight) const;
102 int pixelSnappedLogicalHeight() const { return style()->isHorizontalWritingMode() ? pixelSnappedHeight() : pixelSnappedWidth(); }
103 int pixelSnappedLogicalWidth() const { return style()->isHorizontalWritingMode() ? pixelSnappedWidth() : pixelSnappedHeight(); }
105 void setLogicalLeft(LayoutUnit left)
107 if (style()->isHorizontalWritingMode())
112 void setLogicalTop(LayoutUnit top)
114 if (style()->isHorizontalWritingMode())
119 void setLogicalLocation(const LayoutPoint& location)
121 if (style()->isHorizontalWritingMode())
122 setLocation(location);
124 setLocation(location.transposedPoint());
126 void setLogicalWidth(LayoutUnit size)
128 if (style()->isHorizontalWritingMode())
133 void setLogicalHeight(LayoutUnit size)
135 if (style()->isHorizontalWritingMode())
140 void setLogicalSize(const LayoutSize& size)
142 if (style()->isHorizontalWritingMode())
145 setSize(size.transposedSize());
148 LayoutPoint location() const { return m_frameRect.location(); }
149 LayoutSize locationOffset() const { return LayoutSize(x(), y()); }
150 LayoutSize size() const { return m_frameRect.size(); }
151 IntSize pixelSnappedSize() const { return m_frameRect.pixelSnappedSize(); }
153 void setLocation(const LayoutPoint& location) { m_frameRect.setLocation(location); }
155 void setSize(const LayoutSize& size) { m_frameRect.setSize(size); }
156 void move(LayoutUnit dx, LayoutUnit dy) { m_frameRect.move(dx, dy); }
158 LayoutRect frameRect() const { return m_frameRect; }
159 IntRect pixelSnappedFrameRect() const { return pixelSnappedIntRect(m_frameRect); }
160 void setFrameRect(const LayoutRect& rect) { m_frameRect = rect; }
162 LayoutRect borderBoxRect() const { return LayoutRect(LayoutPoint(), size()); }
163 LayoutRect paddingBoxRect() const { return LayoutRect(borderLeft(), borderTop(), contentWidth() + paddingLeft() + paddingRight(), contentHeight() + paddingTop() + paddingBottom()); }
164 IntRect pixelSnappedBorderBoxRect() const { return IntRect(IntPoint(), m_frameRect.pixelSnappedSize()); }
165 virtual IntRect borderBoundingBox() const OVERRIDE FINAL { return pixelSnappedBorderBoxRect(); }
167 // The content area of the box (excludes padding - and intrinsic padding for table cells, etc... - and border).
168 LayoutRect contentBoxRect() const { return LayoutRect(borderLeft() + paddingLeft(), borderTop() + paddingTop(), contentWidth(), contentHeight()); }
169 // The content box in absolute coords. Ignores transforms.
170 IntRect absoluteContentBox() const;
171 // The content box converted to absolute coords (taking transforms into account).
172 FloatQuad absoluteContentQuad() const;
174 // This returns the content area of the box (excluding padding and border). The only difference with contentBoxRect is that computedCSSContentBoxRect
175 // does include the intrinsic padding in the content box as this is what some callers expect (like getComputedStyle).
176 LayoutRect computedCSSContentBoxRect() const { return LayoutRect(borderLeft() + computedCSSPaddingLeft(), borderTop() + computedCSSPaddingTop(), clientWidth() - computedCSSPaddingLeft() - computedCSSPaddingRight(), clientHeight() - computedCSSPaddingTop() - computedCSSPaddingBottom()); }
178 // Bounds of the outline box in absolute coords. Respects transforms
179 virtual LayoutRect outlineBoundsForRepaint(const RenderLayerModelObject* /*repaintContainer*/, const RenderGeometryMap*) const OVERRIDE FINAL;
180 virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) OVERRIDE;
182 // Use this with caution! No type checking is done!
183 RenderBox* previousSiblingBox() const;
184 RenderBox* nextSiblingBox() const;
185 RenderBox* parentBox() const;
187 bool canResize() const;
189 // Visual and layout overflow are in the coordinate space of the box. This means that they aren't purely physical directions.
190 // For horizontal-tb and vertical-lr they will match physical directions, but for horizontal-bt and vertical-rl, the top/bottom and left/right
191 // respectively are flipped when compared to their physical counterparts. For example minX is on the left in vertical-lr,
192 // but it is on the right in vertical-rl.
193 LayoutRect noOverflowRect() const;
194 LayoutRect layoutOverflowRect() const { return m_overflow ? m_overflow->layoutOverflowRect() : noOverflowRect(); }
195 IntRect pixelSnappedLayoutOverflowRect() const { return pixelSnappedIntRect(layoutOverflowRect()); }
196 LayoutSize maxLayoutOverflow() const { return LayoutSize(layoutOverflowRect().maxX(), layoutOverflowRect().maxY()); }
197 LayoutUnit logicalLeftLayoutOverflow() const { return style()->isHorizontalWritingMode() ? layoutOverflowRect().x() : layoutOverflowRect().y(); }
198 LayoutUnit logicalRightLayoutOverflow() const { return style()->isHorizontalWritingMode() ? layoutOverflowRect().maxX() : layoutOverflowRect().maxY(); }
200 virtual LayoutRect visualOverflowRect() const { return m_overflow ? m_overflow->visualOverflowRect() : borderBoxRect(); }
201 LayoutUnit logicalLeftVisualOverflow() const { return style()->isHorizontalWritingMode() ? visualOverflowRect().x() : visualOverflowRect().y(); }
202 LayoutUnit logicalRightVisualOverflow() const { return style()->isHorizontalWritingMode() ? visualOverflowRect().maxX() : visualOverflowRect().maxY(); }
204 LayoutRect overflowRectForPaintRejection() const;
206 LayoutRect contentsVisualOverflowRect() const { return m_overflow ? m_overflow->contentsVisualOverflowRect() : LayoutRect(); }
208 void addLayoutOverflow(const LayoutRect&);
209 void addVisualOverflow(const LayoutRect&);
211 // Clipped by the contents clip, if one exists.
212 void addContentsVisualOverflow(const LayoutRect&);
214 void addVisualEffectOverflow();
215 void addOverflowFromChild(RenderBox* child) { addOverflowFromChild(child, child->locationOffset()); }
216 void addOverflowFromChild(RenderBox* child, const LayoutSize& delta);
217 void clearLayoutOverflow();
219 void updateLayerTransform();
221 LayoutUnit contentWidth() const { return clientWidth() - paddingLeft() - paddingRight(); }
222 LayoutUnit contentHeight() const { return clientHeight() - paddingTop() - paddingBottom(); }
223 LayoutUnit contentLogicalWidth() const { return style()->isHorizontalWritingMode() ? contentWidth() : contentHeight(); }
224 LayoutUnit contentLogicalHeight() const { return style()->isHorizontalWritingMode() ? contentHeight() : contentWidth(); }
226 // IE extensions. Used to calculate offsetWidth/Height. Overridden by inlines (RenderFlow)
227 // to return the remaining width on a given line (and the height of a single line).
228 virtual LayoutUnit offsetWidth() const OVERRIDE { return width(); }
229 virtual LayoutUnit offsetHeight() const OVERRIDE { return height(); }
231 virtual int pixelSnappedOffsetWidth() const OVERRIDE FINAL;
232 virtual int pixelSnappedOffsetHeight() const OVERRIDE FINAL;
234 bool canDetermineWidthWithoutLayout() const;
235 LayoutUnit fixedOffsetWidth() const;
237 // More IE extensions. clientWidth and clientHeight represent the interior of an object
238 // excluding border and scrollbar. clientLeft/Top are just the borderLeftWidth and borderTopWidth.
239 LayoutUnit clientLeft() const { return borderLeft(); }
240 LayoutUnit clientTop() const { return borderTop(); }
241 LayoutUnit clientWidth() const;
242 LayoutUnit clientHeight() const;
243 LayoutUnit clientLogicalWidth() const { return style()->isHorizontalWritingMode() ? clientWidth() : clientHeight(); }
244 LayoutUnit clientLogicalHeight() const { return style()->isHorizontalWritingMode() ? clientHeight() : clientWidth(); }
245 LayoutUnit clientLogicalBottom() const { return borderBefore() + clientLogicalHeight(); }
246 LayoutRect clientBoxRect() const { return LayoutRect(clientLeft(), clientTop(), clientWidth(), clientHeight()); }
248 int pixelSnappedClientWidth() const;
249 int pixelSnappedClientHeight() const;
251 // scrollWidth/scrollHeight will be the same as clientWidth/clientHeight unless the
252 // object has overflow:hidden/scroll/auto specified and also has overflow.
253 // scrollLeft/Top return the current scroll position. These methods are virtual so that objects like
254 // textareas can scroll shadow content (but pretend that they are the objects that are
256 virtual int scrollLeft() const;
257 virtual int scrollTop() const;
258 virtual int scrollWidth() const;
259 virtual int scrollHeight() const;
260 virtual void setScrollLeft(int);
261 virtual void setScrollTop(int);
263 void scrollToOffset(const IntSize&);
264 void scrollByRecursively(const IntSize& delta, ScrollOffsetClamping = ScrollOffsetUnclamped);
265 void scrollRectToVisible(const LayoutRect&, const ScrollAlignment& alignX, const ScrollAlignment& alignY);
267 virtual LayoutUnit marginTop() const OVERRIDE { return m_marginBox.top(); }
268 virtual LayoutUnit marginBottom() const OVERRIDE { return m_marginBox.bottom(); }
269 virtual LayoutUnit marginLeft() const OVERRIDE { return m_marginBox.left(); }
270 virtual LayoutUnit marginRight() const OVERRIDE { return m_marginBox.right(); }
271 void setMarginTop(LayoutUnit margin) { m_marginBox.setTop(margin); }
272 void setMarginBottom(LayoutUnit margin) { m_marginBox.setBottom(margin); }
273 void setMarginLeft(LayoutUnit margin) { m_marginBox.setLeft(margin); }
274 void setMarginRight(LayoutUnit margin) { m_marginBox.setRight(margin); }
276 LayoutUnit marginLogicalLeft() const { return m_marginBox.logicalLeft(style()->writingMode()); }
277 LayoutUnit marginLogicalRight() const { return m_marginBox.logicalRight(style()->writingMode()); }
279 virtual LayoutUnit marginBefore(const RenderStyle* overrideStyle = 0) const OVERRIDE FINAL { return m_marginBox.before((overrideStyle ? overrideStyle : style())->writingMode()); }
280 virtual LayoutUnit marginAfter(const RenderStyle* overrideStyle = 0) const OVERRIDE FINAL { return m_marginBox.after((overrideStyle ? overrideStyle : style())->writingMode()); }
281 virtual LayoutUnit marginStart(const RenderStyle* overrideStyle = 0) const OVERRIDE FINAL
283 const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style();
284 return m_marginBox.start(styleToUse->writingMode(), styleToUse->direction());
286 virtual LayoutUnit marginEnd(const RenderStyle* overrideStyle = 0) const OVERRIDE FINAL
288 const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style();
289 return m_marginBox.end(styleToUse->writingMode(), styleToUse->direction());
291 void setMarginBefore(LayoutUnit value, const RenderStyle* overrideStyle = 0) { m_marginBox.setBefore((overrideStyle ? overrideStyle : style())->writingMode(), value); }
292 void setMarginAfter(LayoutUnit value, const RenderStyle* overrideStyle = 0) { m_marginBox.setAfter((overrideStyle ? overrideStyle : style())->writingMode(), value); }
293 void setMarginStart(LayoutUnit value, const RenderStyle* overrideStyle = 0)
295 const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style();
296 m_marginBox.setStart(styleToUse->writingMode(), styleToUse->direction(), value);
298 void setMarginEnd(LayoutUnit value, const RenderStyle* overrideStyle = 0)
300 const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style();
301 m_marginBox.setEnd(styleToUse->writingMode(), styleToUse->direction(), value);
304 // The following five functions are used to implement collapsing margins.
305 // All objects know their maximal positive and negative margins. The
306 // formula for computing a collapsed margin is |maxPosMargin| - |maxNegmargin|.
307 // For a non-collapsing box, such as a leaf element, this formula will simply return
308 // the margin of the element. Blocks override the maxMarginBefore and maxMarginAfter
310 enum MarginSign { PositiveMargin, NegativeMargin };
311 virtual bool isSelfCollapsingBlock() const { return false; }
312 virtual LayoutUnit collapsedMarginBefore() const { return marginBefore(); }
313 virtual LayoutUnit collapsedMarginAfter() const { return marginAfter(); }
315 virtual void absoluteRects(Vector<IntRect>&, const LayoutPoint& accumulatedOffset) const OVERRIDE;
316 virtual void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const OVERRIDE;
318 LayoutRect reflectionBox() const;
319 int reflectionOffset() const;
320 // Given a rect in the object's coordinate space, returns the corresponding rect in the reflection.
321 LayoutRect reflectedRect(const LayoutRect&) const;
323 virtual void layout() OVERRIDE;
324 virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE;
325 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE;
327 virtual LayoutUnit minPreferredLogicalWidth() const OVERRIDE;
328 virtual LayoutUnit maxPreferredLogicalWidth() const OVERRIDE;
330 // FIXME: We should rename these back to overrideLogicalHeight/Width and have them store
331 // the border-box height/width like the regular height/width accessors on RenderBox.
332 // Right now, these are different than contentHeight/contentWidth because they still
333 // include the scrollbar height/width.
334 LayoutUnit overrideLogicalContentWidth() const;
335 LayoutUnit overrideLogicalContentHeight() const;
336 bool hasOverrideHeight() const;
337 bool hasOverrideWidth() const;
338 void setOverrideLogicalContentHeight(LayoutUnit);
339 void setOverrideLogicalContentWidth(LayoutUnit);
340 void clearOverrideSize();
341 void clearOverrideLogicalContentHeight();
342 void clearOverrideLogicalContentWidth();
344 LayoutUnit overrideContainingBlockContentLogicalWidth() const;
345 LayoutUnit overrideContainingBlockContentLogicalHeight() const;
346 bool hasOverrideContainingBlockLogicalWidth() const;
347 bool hasOverrideContainingBlockLogicalHeight() const;
348 void setOverrideContainingBlockContentLogicalWidth(LayoutUnit);
349 void setOverrideContainingBlockContentLogicalHeight(LayoutUnit);
350 void clearContainingBlockOverrideSize();
351 void clearOverrideContainingBlockContentLogicalHeight();
353 virtual LayoutSize offsetFromContainer(RenderObject*, const LayoutPoint&, bool* offsetDependsOnPoint = 0) const OVERRIDE;
355 LayoutUnit adjustBorderBoxLogicalWidthForBoxSizing(LayoutUnit width) const;
356 LayoutUnit adjustBorderBoxLogicalHeightForBoxSizing(LayoutUnit height) const;
357 LayoutUnit adjustContentBoxLogicalWidthForBoxSizing(LayoutUnit width) const;
358 LayoutUnit adjustContentBoxLogicalHeightForBoxSizing(LayoutUnit height) const;
360 struct ComputedMarginValues {
361 ComputedMarginValues() { }
368 struct LogicalExtentComputedValues {
369 LogicalExtentComputedValues() { }
372 LayoutUnit m_position;
373 ComputedMarginValues m_margins;
375 // Resolve auto margins in the inline direction of the containing block so that objects can be pushed to the start, middle or end
376 // of the containing block.
377 void computeInlineDirectionMargins(RenderBlock* containingBlock, LayoutUnit containerWidth, LayoutUnit childWidth, LayoutUnit& marginStart, LayoutUnit& marginEnd) const;
379 // Used to resolve margins in the containing block's block-flow direction.
380 void computeBlockDirectionMargins(const RenderBlock* containingBlock, LayoutUnit& marginBefore, LayoutUnit& marginAfter) const;
381 void computeAndSetBlockDirectionMargins(const RenderBlock* containingBlock);
383 enum RenderBoxRegionInfoFlags { CacheRenderBoxRegionInfo, DoNotCacheRenderBoxRegionInfo };
384 LayoutRect borderBoxRectInRegion(RenderRegion*, RenderBoxRegionInfoFlags = CacheRenderBoxRegionInfo) const;
385 void clearRenderBoxRegionInfo();
386 virtual LayoutUnit offsetFromLogicalTopOfFirstPage() const;
388 void positionLineBox(InlineBox*);
390 virtual InlineBox* createInlineBox();
391 void dirtyLineBoxes(bool fullLayout);
393 // For inline replaced elements, this function returns the inline box that owns us. Enables
394 // the replaced RenderObject to quickly determine what line it is contained on and to easily
395 // iterate over structures on the line.
396 InlineBox* inlineBoxWrapper() const { return m_inlineBoxWrapper; }
397 void setInlineBoxWrapper(InlineBox*);
398 void deleteLineBoxWrapper();
400 virtual LayoutRect clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const OVERRIDE;
401 virtual void computeRectForRepaint(const RenderLayerModelObject* repaintContainer, LayoutRect&, bool fixed = false) const OVERRIDE;
402 void repaintDuringLayoutIfMoved(const LayoutRect&);
403 virtual void repaintOverhangingFloats(bool paintAllDescendants);
405 virtual LayoutUnit containingBlockLogicalWidthForContent() const OVERRIDE;
406 LayoutUnit containingBlockLogicalHeightForContent(AvailableLogicalHeightType) const;
408 LayoutUnit containingBlockLogicalWidthForContentInRegion(RenderRegion*) const;
409 LayoutUnit containingBlockAvailableLineWidthInRegion(RenderRegion*) const;
410 LayoutUnit perpendicularContainingBlockLogicalHeight() const;
412 virtual void updateLogicalWidth();
413 virtual void updateLogicalHeight();
414 virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const;
416 RenderBoxRegionInfo* renderBoxRegionInfo(RenderRegion*, RenderBoxRegionInfoFlags = CacheRenderBoxRegionInfo) const;
417 void computeLogicalWidthInRegion(LogicalExtentComputedValues&, RenderRegion* = 0) const;
419 bool stretchesToViewport() const
421 return document().inQuirksMode() && style()->logicalHeight().isAuto() && !isFloatingOrOutOfFlowPositioned() && (isRoot() || isBody()) && !isInline();
424 virtual LayoutSize intrinsicSize() const { return LayoutSize(); }
425 LayoutUnit intrinsicLogicalWidth() const { return style()->isHorizontalWritingMode() ? intrinsicSize().width() : intrinsicSize().height(); }
426 LayoutUnit intrinsicLogicalHeight() const { return style()->isHorizontalWritingMode() ? intrinsicSize().height() : intrinsicSize().width(); }
428 // Whether or not the element shrinks to its intrinsic width (rather than filling the width
429 // of a containing block). HTML4 buttons, <select>s, <input>s, legends, and floating/compact elements do this.
430 bool sizesLogicalWidthToFitContent(SizeType) const;
432 LayoutUnit shrinkLogicalWidthToAvoidFloats(LayoutUnit childMarginStart, LayoutUnit childMarginEnd, const RenderBlockFlow* cb, RenderRegion*) const;
434 LayoutUnit computeLogicalWidthInRegionUsing(SizeType, Length logicalWidth, LayoutUnit availableLogicalWidth, const RenderBlock* containingBlock, RenderRegion*) const;
435 LayoutUnit computeLogicalHeightUsing(const Length& height, LayoutUnit intrinsicContentHeight) const;
436 LayoutUnit computeContentLogicalHeight(const Length& height, LayoutUnit intrinsicContentHeight) const;
437 LayoutUnit computeContentAndScrollbarLogicalHeightUsing(const Length& height, LayoutUnit intrinsicContentHeight) const;
438 LayoutUnit computeReplacedLogicalWidthUsing(Length width) const;
439 LayoutUnit computeReplacedLogicalWidthRespectingMinMaxWidth(LayoutUnit logicalWidth, ShouldComputePreferred = ComputeActual) const;
440 LayoutUnit computeReplacedLogicalHeightUsing(Length height) const;
441 LayoutUnit computeReplacedLogicalHeightRespectingMinMaxHeight(LayoutUnit logicalHeight) const;
443 virtual LayoutUnit computeReplacedLogicalWidth(ShouldComputePreferred = ComputeActual) const;
444 virtual LayoutUnit computeReplacedLogicalHeight() const;
446 static bool percentageLogicalHeightIsResolvableFromBlock(const RenderBlock* containingBlock, bool outOfFlowPositioned);
447 LayoutUnit computePercentageLogicalHeight(const Length& height) const;
449 // Block flows subclass availableWidth/Height to handle multi column layout (shrinking the width/height available to children when laying out.)
450 virtual LayoutUnit availableLogicalWidth() const { return contentLogicalWidth(); }
451 virtual LayoutUnit availableLogicalHeight(AvailableLogicalHeightType) const;
452 LayoutUnit availableLogicalHeightUsing(const Length&, AvailableLogicalHeightType) const;
454 // There are a few cases where we need to refer specifically to the available physical width and available physical height.
455 // Relative positioning is one of those cases, since left/top offsets are physical.
456 LayoutUnit availableWidth() const { return style()->isHorizontalWritingMode() ? availableLogicalWidth() : availableLogicalHeight(IncludeMarginBorderPadding); }
457 LayoutUnit availableHeight() const { return style()->isHorizontalWritingMode() ? availableLogicalHeight(IncludeMarginBorderPadding) : availableLogicalWidth(); }
459 virtual int verticalScrollbarWidth() const;
460 int horizontalScrollbarHeight() const;
461 int instrinsicScrollbarLogicalWidth() const;
462 int scrollbarLogicalHeight() const { return style()->isHorizontalWritingMode() ? horizontalScrollbarHeight() : verticalScrollbarWidth(); }
463 virtual bool scroll(ScrollDirection, ScrollGranularity, float delta = 1);
464 bool canBeScrolledAndHasScrollableArea() const;
465 virtual bool canBeProgramaticallyScrolled() const;
466 virtual void autoscroll(const IntPoint&);
467 bool autoscrollInProgress() const;
468 bool canAutoscroll() const;
469 IntSize calculateAutoscrollDirection(const IntPoint& windowPoint) const;
470 static RenderBox* findAutoscrollable(RenderObject*);
471 virtual void stopAutoscroll() { }
472 virtual void panScroll(const IntPoint&);
474 bool hasAutoVerticalScrollbar() const { return hasOverflowClip() && (style()->overflowY() == OAUTO || style()->overflowY() == OOVERLAY); }
475 bool hasAutoHorizontalScrollbar() const { return hasOverflowClip() && (style()->overflowX() == OAUTO || style()->overflowX() == OOVERLAY); }
476 bool scrollsOverflow() const { return scrollsOverflowX() || scrollsOverflowY(); }
478 bool hasScrollableOverflowX() const { return scrollsOverflowX() && scrollWidth() != clientWidth(); }
479 bool hasScrollableOverflowY() const { return scrollsOverflowY() && scrollHeight() != clientHeight(); }
480 virtual bool scrollsOverflowX() const { return hasOverflowClip() && (style()->overflowX() == OSCROLL || hasAutoHorizontalScrollbar()); }
481 virtual bool scrollsOverflowY() const { return hasOverflowClip() && (style()->overflowY() == OSCROLL || hasAutoVerticalScrollbar()); }
482 bool usesCompositedScrolling() const;
484 // Elements such as the <input> field override this to specify that they are scrollable
485 // outside the context of the CSS overflow style
486 virtual bool isIntristicallyScrollable(ScrollbarOrientation orientation) const { return false; }
488 bool hasUnsplittableScrollingOverflow() const;
489 bool isUnsplittableForPagination() const;
491 virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = 0) OVERRIDE;
493 virtual LayoutRect overflowClipRect(const LayoutPoint& location, RenderRegion*, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize);
494 LayoutRect clipRect(const LayoutPoint& location, RenderRegion*);
495 virtual bool hasControlClip() const { return false; }
496 virtual LayoutRect controlClipRect(const LayoutPoint&) const { return LayoutRect(); }
497 bool pushContentsClip(PaintInfo&, const LayoutPoint& accumulatedOffset, ContentsClipBehavior);
498 void popContentsClip(PaintInfo&, PaintPhase originalPhase, const LayoutPoint& accumulatedOffset);
500 virtual void paintObject(PaintInfo&, const LayoutPoint&) { ASSERT_NOT_REACHED(); }
501 virtual void paintBoxDecorations(PaintInfo&, const LayoutPoint&);
502 virtual void paintMask(PaintInfo&, const LayoutPoint&);
503 virtual void paintClippingMask(PaintInfo&, const LayoutPoint&);
504 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) OVERRIDE;
506 // Called when a positioned object moves but doesn't necessarily change size. A simplified layout is attempted
507 // that just updates the object's position. If the size does change, the object remains dirty.
508 bool tryLayoutDoingPositionedMovementOnly()
510 LayoutUnit oldWidth = width();
511 updateLogicalWidth();
512 // If we shrink to fit our width may have changed, so we still need full layout.
513 if (oldWidth != width())
515 updateLogicalHeight();
519 LayoutRect maskClipRect();
521 virtual PositionWithAffinity positionForPoint(const LayoutPoint&) OVERRIDE;
523 void removeFloatingOrPositionedChildFromBlockLists();
525 RenderLayer* enclosingFloatPaintingLayer() const;
527 virtual int firstLineBoxBaseline() const { return -1; }
528 virtual int inlineBlockBaseline(LineDirectionMode) const { return -1; } // Returns -1 if we should skip this box when computing the baseline of an inline-block.
530 bool shrinkToAvoidFloats() const;
531 virtual bool avoidsFloats() const;
533 virtual void markForPaginationRelayoutIfNeeded(SubtreeLayoutScope&) { }
535 bool isWritingModeRoot() const { return !parent() || parent()->style()->writingMode() != style()->writingMode(); }
537 bool isDeprecatedFlexItem() const { return !isInline() && !isFloatingOrOutOfFlowPositioned() && parent() && parent()->isDeprecatedFlexibleBox(); }
538 bool isFlexItemIncludingDeprecated() const { return !isInline() && !isFloatingOrOutOfFlowPositioned() && parent() && parent()->isFlexibleBoxIncludingDeprecated(); }
540 virtual LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const OVERRIDE;
541 virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const OVERRIDE;
543 virtual LayoutUnit offsetLeft() const OVERRIDE;
544 virtual LayoutUnit offsetTop() const OVERRIDE;
546 LayoutPoint flipForWritingModeForChild(const RenderBox* child, const LayoutPoint&) const;
547 LayoutUnit flipForWritingMode(LayoutUnit position) const; // The offset is in the block direction (y for horizontal writing modes, x for vertical writing modes).
548 LayoutPoint flipForWritingMode(const LayoutPoint&) const;
549 LayoutPoint flipForWritingModeIncludingColumns(const LayoutPoint&) const;
550 LayoutSize flipForWritingMode(const LayoutSize&) const;
551 void flipForWritingMode(LayoutRect&) const;
552 FloatPoint flipForWritingMode(const FloatPoint&) const;
553 void flipForWritingMode(FloatRect&) const;
554 // These represent your location relative to your container as a physical offset.
555 // In layout related methods you almost always want the logical location (e.g. x() and y()).
556 LayoutPoint topLeftLocation() const;
557 LayoutSize topLeftLocationOffset() const;
559 LayoutRect logicalVisualOverflowRectForPropagation(RenderStyle*) const;
560 LayoutRect visualOverflowRectForPropagation(RenderStyle*) const;
561 LayoutRect logicalLayoutOverflowRectForPropagation(RenderStyle*) const;
562 LayoutRect layoutOverflowRectForPropagation(RenderStyle*) const;
564 bool hasRenderOverflow() const { return m_overflow; }
565 bool hasVisualOverflow() const { return m_overflow && !borderBoxRect().contains(m_overflow->visualOverflowRect()); }
567 virtual bool needsPreferredWidthsRecalculation() const;
568 virtual void computeIntrinsicRatioInformation(FloatSize& /* intrinsicSize */, double& /* intrinsicRatio */, bool& /* isPercentageIntrinsicSize */) const { }
570 IntSize scrolledContentOffset() const;
571 LayoutSize cachedSizeForOverflowClip() const;
572 void applyCachedClipAndScrollOffsetForRepaint(LayoutRect& paintRect) const;
574 virtual bool hasRelativeLogicalHeight() const;
576 bool hasHorizontalLayoutOverflow() const
581 LayoutRect layoutOverflowRect = m_overflow->layoutOverflowRect();
582 LayoutRect noOverflowRect = this->noOverflowRect();
583 return layoutOverflowRect.x() < noOverflowRect.x() || layoutOverflowRect.maxX() > noOverflowRect.maxX();
586 bool hasVerticalLayoutOverflow() const
591 LayoutRect layoutOverflowRect = m_overflow->layoutOverflowRect();
592 LayoutRect noOverflowRect = this->noOverflowRect();
593 return layoutOverflowRect.y() < noOverflowRect.y() || layoutOverflowRect.maxY() > noOverflowRect.maxY();
596 virtual RenderBox* createAnonymousBoxWithSameTypeAs(const RenderObject*) const
598 ASSERT_NOT_REACHED();
602 bool hasSameDirectionAs(const RenderBox* object) const { return style()->direction() == object->style()->direction(); }
604 ShapeOutsideInfo* shapeOutsideInfo() const
606 return ShapeOutsideInfo::isEnabledFor(this) ? ShapeOutsideInfo::info(this) : 0;
609 void markShapeOutsideDependentsForLayout()
612 removeFloatingOrPositionedChildFromBlockLists();
616 virtual void willBeDestroyed() OVERRIDE;
618 virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle) OVERRIDE;
619 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
620 virtual void updateFromStyle() OVERRIDE;
622 LayoutRect backgroundPaintedExtent() const;
623 virtual bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const;
624 virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE;
626 void paintBackgroundWithBorderAndBoxShadow(PaintInfo&, const LayoutRect&, BackgroundBleedAvoidance);
627 void paintBackground(const PaintInfo&, const LayoutRect&, BackgroundBleedAvoidance = BackgroundBleedNone);
629 void paintFillLayer(const PaintInfo&, const Color&, const FillLayer*, const LayoutRect&, BackgroundBleedAvoidance, CompositeOperator, RenderObject* backgroundObject);
630 void paintFillLayers(const PaintInfo&, const Color&, const FillLayer*, const LayoutRect&, BackgroundBleedAvoidance = BackgroundBleedNone, CompositeOperator = CompositeSourceOver, RenderObject* backgroundObject = 0);
632 void paintMaskImages(const PaintInfo&, const LayoutRect&);
633 void paintBoxDecorationsWithRect(PaintInfo&, const LayoutPoint&, const LayoutRect&);
635 BackgroundBleedAvoidance determineBackgroundBleedAvoidance(GraphicsContext*) const;
636 bool backgroundHasOpaqueTopLayer() const;
638 void computePositionedLogicalWidth(LogicalExtentComputedValues&, RenderRegion* = 0) const;
640 LayoutUnit computeIntrinsicLogicalWidthUsing(Length logicalWidthLength, LayoutUnit availableLogicalWidth, LayoutUnit borderAndPadding) const;
641 LayoutUnit computeIntrinsicLogicalContentHeightUsing(Length logicalHeightLength, LayoutUnit intrinsicContentHeight, LayoutUnit borderAndPadding) const;
643 virtual bool shouldComputeSizeAsReplaced() const { return isReplaced() && !isInlineBlockOrInlineTable(); }
645 virtual void mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0) const OVERRIDE;
646 virtual void mapAbsoluteToLocalPoint(MapCoordinatesFlags, TransformState&) const OVERRIDE;
648 void paintRootBoxFillLayers(const PaintInfo&);
650 RenderObject* splitAnonymousBoxesAroundChild(RenderObject* beforeChild);
652 virtual void addLayerHitTestRects(LayerHitTestRects&, const RenderLayer* currentCompositedLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const OVERRIDE;
653 virtual void computeSelfHitTestRects(Vector<LayoutRect>&, const LayoutPoint& layerOffset) const OVERRIDE;
656 void updateShapeOutsideInfoAfterStyleChange(const RenderStyle&, const RenderStyle* oldStyle);
657 void updateGridPositionAfterStyleChange(const RenderStyle*);
659 bool autoWidthShouldFitContent() const;
660 void shrinkToFitWidth(const LayoutUnit availableSpace, const LayoutUnit logicalLeftValue, const LayoutUnit bordersPlusPadding, LogicalExtentComputedValues&) const;
662 // Returns true if we did a full repaint
663 bool repaintLayerRectsForImage(WrappedImagePtr image, const FillLayer* layers, bool drawingBackground);
665 bool skipContainingBlockForPercentHeightCalculation(const RenderBox* containingBlock) const;
667 LayoutUnit containingBlockLogicalWidthForPositioned(const RenderBoxModelObject* containingBlock, RenderRegion* = 0, bool checkForPerpendicularWritingMode = true) const;
668 LayoutUnit containingBlockLogicalHeightForPositioned(const RenderBoxModelObject* containingBlock, bool checkForPerpendicularWritingMode = true) const;
670 LayoutUnit viewLogicalHeightForPercentages() const;
672 void computePositionedLogicalHeight(LogicalExtentComputedValues&) const;
673 void computePositionedLogicalWidthUsing(Length logicalWidth, const RenderBoxModelObject* containerBlock, TextDirection containerDirection,
674 LayoutUnit containerLogicalWidth, LayoutUnit bordersPlusPadding,
675 Length logicalLeft, Length logicalRight, Length marginLogicalLeft, Length marginLogicalRight,
676 LogicalExtentComputedValues&) const;
677 void computePositionedLogicalHeightUsing(Length logicalHeightLength, const RenderBoxModelObject* containerBlock,
678 LayoutUnit containerLogicalHeight, LayoutUnit bordersPlusPadding, LayoutUnit logicalHeight,
679 Length logicalTop, Length logicalBottom, Length marginLogicalTop, Length marginLogicalBottom,
680 LogicalExtentComputedValues&) const;
682 void computePositionedLogicalHeightReplaced(LogicalExtentComputedValues&) const;
683 void computePositionedLogicalWidthReplaced(LogicalExtentComputedValues&) const;
685 LayoutUnit fillAvailableMeasure(LayoutUnit availableLogicalWidth) const;
686 LayoutUnit fillAvailableMeasure(LayoutUnit availableLogicalWidth, LayoutUnit& marginStart, LayoutUnit& marginEnd) const;
688 virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const;
690 // This function calculates the minimum and maximum preferred widths for an object.
691 // These values are used in shrink-to-fit layout systems.
692 // These include tables, positioned objects, floats and flexible boxes.
693 virtual void computePreferredLogicalWidths() { clearPreferredLogicalWidthsDirty(); }
695 virtual LayoutRect frameRectForStickyPositioning() const OVERRIDE FINAL { return frameRect(); }
698 // The width/height of the contents + borders + padding. The x/y location is relative to our container (which is not always our parent).
699 LayoutRect m_frameRect;
702 LayoutBoxExtent m_marginBox;
704 // The preferred logical width of the element if it were to break its lines at every possible opportunity.
705 LayoutUnit m_minPreferredLogicalWidth;
707 // The preferred logical width of the element if it never breaks any lines at all.
708 LayoutUnit m_maxPreferredLogicalWidth;
710 // Our intrinsic height, used for min-height: min-content etc. Maintained by
711 // updateLogicalHeight. This is logicalHeight() before it is clamped to
713 LayoutUnit m_intrinsicContentLogicalHeight;
715 // For inline replaced elements, the inline box that owns us.
716 InlineBox* m_inlineBoxWrapper;
718 // Our overflow information.
719 OwnPtr<RenderOverflow> m_overflow;
722 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderBox, isBox());
724 inline RenderBox* RenderBox::previousSiblingBox() const
726 return toRenderBox(previousSibling());
729 inline RenderBox* RenderBox::nextSiblingBox() const
731 return toRenderBox(nextSibling());
734 inline RenderBox* RenderBox::parentBox() const
736 return toRenderBox(parent());
739 inline RenderBox* RenderBox::firstChildBox() const
741 return toRenderBox(firstChild());
744 inline RenderBox* RenderBox::lastChildBox() const
746 return toRenderBox(lastChild());
749 inline void RenderBox::setInlineBoxWrapper(InlineBox* boxWrapper)
752 ASSERT(!m_inlineBoxWrapper);
753 // m_inlineBoxWrapper should already be 0. Deleting it is a safeguard against security issues.
754 // Otherwise, there will two line box wrappers keeping the reference to this renderer, and
755 // only one will be notified when the renderer is getting destroyed. The second line box wrapper
756 // will keep a stale reference.
757 if (UNLIKELY(m_inlineBoxWrapper != 0))
758 deleteLineBoxWrapper();
761 m_inlineBoxWrapper = boxWrapper;
764 } // namespace WebCore
766 #endif // RenderBox_h