| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com) |
| * (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com) |
| * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. |
| * Copyright (C) 2010 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #include "sky/engine/core/rendering/RenderBoxModelObject.h" |
| |
| #include "sky/engine/core/frame/Settings.h" |
| #include "sky/engine/core/rendering/RenderBlock.h" |
| #include "sky/engine/core/rendering/RenderGeometryMap.h" |
| #include "sky/engine/core/rendering/RenderInline.h" |
| #include "sky/engine/core/rendering/RenderLayer.h" |
| #include "sky/engine/core/rendering/RenderObjectInlines.h" |
| #include "sky/engine/core/rendering/RenderView.h" |
| #include "sky/engine/core/rendering/style/ShadowList.h" |
| #include "sky/engine/platform/LengthFunctions.h" |
| #include "sky/engine/platform/geometry/TransformState.h" |
| #include "sky/engine/platform/graphics/DrawLooperBuilder.h" |
| #include "sky/engine/platform/graphics/GraphicsContextStateSaver.h" |
| #include "sky/engine/platform/graphics/Path.h" |
| #include "sky/engine/wtf/CurrentTime.h" |
| |
| namespace blink { |
| |
| void RenderBoxModelObject::setSelectionState(SelectionState state) |
| { |
| if (state == SelectionInside && selectionState() != SelectionNone) |
| return; |
| |
| if ((state == SelectionStart && selectionState() == SelectionEnd) |
| || (state == SelectionEnd && selectionState() == SelectionStart)) |
| RenderObject::setSelectionState(SelectionBoth); |
| else |
| RenderObject::setSelectionState(state); |
| |
| // FIXME: We should consider whether it is OK propagating to ancestor RenderInlines. |
| // This is a workaround for http://webkit.org/b/32123 |
| // The containing block can be null in case of an orphaned tree. |
| RenderBlock* containingBlock = this->containingBlock(); |
| if (containingBlock && !containingBlock->isRenderView()) |
| containingBlock->setSelectionState(state); |
| } |
| |
| RenderBoxModelObject::RenderBoxModelObject(ContainerNode* node) |
| : RenderObject(node) |
| { |
| } |
| |
| RenderBoxModelObject::~RenderBoxModelObject() |
| { |
| } |
| |
| bool RenderBoxModelObject::hasAutoHeightOrContainingBlockWithAutoHeight() const |
| { |
| Length logicalHeightLength = style()->logicalHeight(); |
| if (logicalHeightLength.isAuto()) |
| return true; |
| |
| // For percentage heights: The percentage is calculated with respect to the height of the generated box's |
| // containing block. If the height of the containing block is not specified explicitly (i.e., it depends |
| // on content height), and this element is not absolutely positioned, the value computes to 'auto'. |
| // FIXME(sky): We might want to make height: 100% be sensible. |
| if (!logicalHeightLength.isPercent() || isOutOfFlowPositioned()) |
| return false; |
| |
| RenderBlock* cb = containingBlock(); |
| |
| // Match RenderBox::availableLogicalHeightUsing by special casing |
| // the render view. The available height is taken from the frame. |
| if (cb->isRenderView()) |
| return false; |
| |
| if (cb->isOutOfFlowPositioned() && !cb->style()->logicalTop().isAuto() && !cb->style()->logicalBottom().isAuto()) |
| return false; |
| |
| // If the height of the containing block computes to 'auto', then it hasn't been 'specified explicitly'. |
| return cb->hasAutoHeightOrContainingBlockWithAutoHeight(); |
| } |
| |
| LayoutSize RenderBoxModelObject::relativePositionOffset() const |
| { |
| LayoutSize offset; |
| |
| RenderBlock* containingBlock = this->containingBlock(); |
| |
| // Objects that shrink to avoid floats normally use available line width when computing containing block width. However |
| // in the case of relative positioning using percentages, we can't do this. The offset should always be resolved using the |
| // available width of the containing block. Therefore we don't use containingBlockLogicalWidthForContent() here, but instead explicitly |
| // call availableWidth on our containing block. |
| if (!style()->left().isAuto()) { |
| if (!style()->right().isAuto() && !containingBlock->style()->isLeftToRightDirection()) |
| offset.setWidth(-valueForLength(style()->right(), containingBlock->availableWidth())); |
| else |
| offset.expand(valueForLength(style()->left(), containingBlock->availableWidth()), 0); |
| } else if (!style()->right().isAuto()) { |
| offset.expand(-valueForLength(style()->right(), containingBlock->availableWidth()), 0); |
| } |
| |
| // If the containing block of a relatively positioned element does not |
| // specify a height, a percentage top or bottom offset should be resolved as |
| // auto. An exception to this is if the containing block has the WinIE quirk |
| // where <html> and <body> assume the size of the viewport. In this case, |
| // calculate the percent offset based on this height. |
| // See <https://bugs.webkit.org/show_bug.cgi?id=26396>. |
| if (!style()->top().isAuto() |
| && (!containingBlock->hasAutoHeightOrContainingBlockWithAutoHeight() |
| || !style()->top().isPercent())) |
| offset.expand(0, valueForLength(style()->top(), containingBlock->availableHeight())); |
| |
| else if (!style()->bottom().isAuto() |
| && (!containingBlock->hasAutoHeightOrContainingBlockWithAutoHeight() |
| || !style()->bottom().isPercent())) |
| offset.expand(0, -valueForLength(style()->bottom(), containingBlock->availableHeight())); |
| |
| return offset; |
| } |
| |
| LayoutPoint RenderBoxModelObject::adjustedPositionRelativeToOffsetParent(const LayoutPoint& startPoint) const |
| { |
| if (!parent()) |
| return LayoutPoint(); |
| |
| LayoutPoint referencePoint = startPoint; |
| |
| // If the offsetParent of the element is null, or is the HTML body element, |
| // return the distance between the canvas origin and the left border edge |
| // of the element and stop this algorithm. |
| Element* element = offsetParent(); |
| if (!element) |
| return referencePoint; |
| |
| if (const RenderBoxModelObject* offsetParent = element->renderBoxModelObject()) { |
| if (offsetParent->isBox()) |
| referencePoint.move(-toRenderBox(offsetParent)->borderLeft(), -toRenderBox(offsetParent)->borderTop()); |
| if (!isOutOfFlowPositioned()) { |
| RenderObject* current; |
| for (current = parent(); current != offsetParent && current->parent(); current = current->parent()) { |
| // FIXME: What are we supposed to do inside SVG content? |
| if (!isOutOfFlowPositioned()) { |
| if (current->isBox()) |
| referencePoint.moveBy(toRenderBox(current)->location()); |
| } |
| } |
| } |
| } |
| |
| return referencePoint; |
| } |
| |
| LayoutUnit RenderBoxModelObject::offsetLeft() const |
| { |
| // Note that RenderInline and RenderBox override this to pass a different |
| // startPoint to adjustedPositionRelativeToOffsetParent. |
| return adjustedPositionRelativeToOffsetParent(LayoutPoint()).x(); |
| } |
| |
| LayoutUnit RenderBoxModelObject::offsetTop() const |
| { |
| // Note that RenderInline and RenderBox override this to pass a different |
| // startPoint to adjustedPositionRelativeToOffsetParent. |
| return adjustedPositionRelativeToOffsetParent(LayoutPoint()).y(); |
| } |
| |
| int RenderBoxModelObject::pixelSnappedOffsetWidth() const |
| { |
| return snapSizeToPixel(offsetWidth(), offsetLeft()); |
| } |
| |
| int RenderBoxModelObject::pixelSnappedOffsetHeight() const |
| { |
| return snapSizeToPixel(offsetHeight(), offsetTop()); |
| } |
| |
| LayoutUnit RenderBoxModelObject::computedCSSPadding(const Length& padding) const |
| { |
| LayoutUnit w = 0; |
| if (padding.isPercent()) |
| w = containingBlockLogicalWidthForContent(); |
| return minimumValueForLength(padding, w); |
| } |
| |
| RoundedRect RenderBoxModelObject::getBackgroundRoundedRect(const LayoutRect& borderRect, InlineFlowBox* box, LayoutUnit inlineBoxWidth, LayoutUnit inlineBoxHeight, |
| bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const |
| { |
| RoundedRect border = style()->getRoundedBorderFor(borderRect, includeLogicalLeftEdge, includeLogicalRightEdge); |
| if (box && (box->nextLineBox() || box->prevLineBox())) { |
| RoundedRect segmentBorder = style()->getRoundedBorderFor(LayoutRect(0, 0, inlineBoxWidth, inlineBoxHeight), includeLogicalLeftEdge, includeLogicalRightEdge); |
| border.setRadii(segmentBorder.radii()); |
| } |
| |
| return border; |
| } |
| |
| void RenderBoxModelObject::clipRoundedInnerRect(GraphicsContext * context, const LayoutRect& rect, const RoundedRect& clipRect) |
| { |
| if (clipRect.isRenderable()) |
| context->clipRoundedRect(clipRect); |
| else { |
| // We create a rounded rect for each of the corners and clip it, while making sure we clip opposing corners together. |
| if (!clipRect.radii().topLeft().isEmpty() || !clipRect.radii().bottomRight().isEmpty()) { |
| IntRect topCorner(clipRect.rect().x(), clipRect.rect().y(), rect.maxX() - clipRect.rect().x(), rect.maxY() - clipRect.rect().y()); |
| RoundedRect::Radii topCornerRadii; |
| topCornerRadii.setTopLeft(clipRect.radii().topLeft()); |
| context->clipRoundedRect(RoundedRect(topCorner, topCornerRadii)); |
| |
| IntRect bottomCorner(rect.x(), rect.y(), clipRect.rect().maxX() - rect.x(), clipRect.rect().maxY() - rect.y()); |
| RoundedRect::Radii bottomCornerRadii; |
| bottomCornerRadii.setBottomRight(clipRect.radii().bottomRight()); |
| context->clipRoundedRect(RoundedRect(bottomCorner, bottomCornerRadii)); |
| } |
| |
| if (!clipRect.radii().topRight().isEmpty() || !clipRect.radii().bottomLeft().isEmpty()) { |
| IntRect topCorner(rect.x(), clipRect.rect().y(), clipRect.rect().maxX() - rect.x(), rect.maxY() - clipRect.rect().y()); |
| RoundedRect::Radii topCornerRadii; |
| topCornerRadii.setTopRight(clipRect.radii().topRight()); |
| context->clipRoundedRect(RoundedRect(topCorner, topCornerRadii)); |
| |
| IntRect bottomCorner(clipRect.rect().x(), rect.y(), rect.maxX() - clipRect.rect().x(), clipRect.rect().maxY() - rect.y()); |
| RoundedRect::Radii bottomCornerRadii; |
| bottomCornerRadii.setBottomLeft(clipRect.radii().bottomLeft()); |
| context->clipRoundedRect(RoundedRect(bottomCorner, bottomCornerRadii)); |
| } |
| } |
| } |
| |
| // FIXME: See crbug.com/382491. The use of getCTM in this context is incorrect because the matrix returned does not |
| // include scales applied at raster time, such as the device zoom. |
| static LayoutRect shrinkRectByOnePixel(GraphicsContext* context, const LayoutRect& rect) |
| { |
| LayoutRect shrunkRect = rect; |
| AffineTransform transform = context->getCTM(); |
| shrunkRect.inflateX(-static_cast<LayoutUnit>(ceil(1 / transform.xScale()))); |
| shrunkRect.inflateY(-static_cast<LayoutUnit>(ceil(1 / transform.yScale()))); |
| return shrunkRect; |
| } |
| |
| LayoutRect RenderBoxModelObject::borderInnerRectAdjustedForBleedAvoidance(GraphicsContext* context, const LayoutRect& rect, BackgroundBleedAvoidance bleedAvoidance) const |
| { |
| // We shrink the rectangle by one pixel on each side to make it fully overlap the anti-aliased background border |
| return (bleedAvoidance == BackgroundBleedBackgroundOverBorder) ? shrinkRectByOnePixel(context, rect) : rect; |
| } |
| |
| RoundedRect RenderBoxModelObject::backgroundRoundedRectAdjustedForBleedAvoidance(GraphicsContext* context, const LayoutRect& borderRect, BackgroundBleedAvoidance bleedAvoidance, InlineFlowBox* box, const LayoutSize& boxSize, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const |
| { |
| if (bleedAvoidance == BackgroundBleedShrinkBackground) { |
| // We shrink the rectangle by one pixel on each side because the bleed is one pixel maximum. |
| return getBackgroundRoundedRect(shrinkRectByOnePixel(context, borderRect), box, boxSize.width(), boxSize.height(), includeLogicalLeftEdge, includeLogicalRightEdge); |
| } |
| if (bleedAvoidance == BackgroundBleedBackgroundOverBorder) |
| return style()->getRoundedInnerBorderFor(borderRect, includeLogicalLeftEdge, includeLogicalRightEdge); |
| |
| return getBackgroundRoundedRect(borderRect, box, boxSize.width(), boxSize.height(), includeLogicalLeftEdge, includeLogicalRightEdge); |
| } |
| |
| static void applyBoxShadowForBackground(GraphicsContext* context, const RenderObject* renderer) |
| { |
| const ShadowList* shadowList = renderer->style()->boxShadow(); |
| ASSERT(shadowList); |
| for (size_t i = shadowList->shadows().size(); i--; ) { |
| const ShadowData& boxShadow = shadowList->shadows()[i]; |
| if (boxShadow.style() != Normal) |
| continue; |
| FloatSize shadowOffset(boxShadow.x(), boxShadow.y()); |
| context->setShadow(shadowOffset, boxShadow.blur(), boxShadow.color(), |
| DrawLooperBuilder::ShadowRespectsTransforms, DrawLooperBuilder::ShadowIgnoresAlpha); |
| return; |
| } |
| } |
| |
| void RenderBoxModelObject::paintFillLayerExtended(const PaintInfo& paintInfo, const Color& color, const FillLayer& bgLayer, const LayoutRect& rect, |
| BackgroundBleedAvoidance bleedAvoidance, InlineFlowBox* box, const LayoutSize& boxSize, RenderObject* backgroundObject, bool skipBaseColor) |
| { |
| GraphicsContext* context = paintInfo.context; |
| if (rect.isEmpty()) |
| return; |
| |
| bool includeLeftEdge = box ? box->includeLogicalLeftEdge() : true; |
| bool includeRightEdge = box ? box->includeLogicalRightEdge() : true; |
| |
| bool hasRoundedBorder = style()->hasBorderRadius() && (includeLeftEdge || includeRightEdge); |
| bool clippedWithLocalScrolling = hasOverflowClip() && bgLayer.attachment() == LocalBackgroundAttachment; |
| bool isBorderFill = bgLayer.clip() == BorderFillBox; |
| bool isBottomLayer = !bgLayer.next(); |
| |
| Color bgColor = color; |
| StyleImage* bgImage = bgLayer.image(); |
| bool shouldPaintBackgroundImage = bgImage && bgImage->canRender(*this); |
| |
| bool colorVisible = bgColor.alpha(); |
| |
| // Fast path for drawing simple color backgrounds. |
| if (!clippedWithLocalScrolling && !shouldPaintBackgroundImage && isBorderFill && isBottomLayer) { |
| if (!colorVisible) |
| return; |
| |
| bool boxShadowShouldBeAppliedToBackground = this->boxShadowShouldBeAppliedToBackground(bleedAvoidance, box); |
| GraphicsContextStateSaver shadowStateSaver(*context, boxShadowShouldBeAppliedToBackground); |
| if (boxShadowShouldBeAppliedToBackground) |
| applyBoxShadowForBackground(context, this); |
| |
| if (hasRoundedBorder && bleedAvoidance != BackgroundBleedClipBackground) { |
| RoundedRect border = backgroundRoundedRectAdjustedForBleedAvoidance(context, rect, bleedAvoidance, box, boxSize, includeLeftEdge, includeRightEdge); |
| if (border.isRenderable()) |
| context->fillRoundedRect(border, bgColor); |
| else { |
| context->save(); |
| clipRoundedInnerRect(context, rect, border); |
| context->fillRect(border.rect(), bgColor); |
| context->restore(); |
| } |
| } else { |
| context->fillRect(pixelSnappedIntRect(rect), bgColor); |
| } |
| |
| return; |
| } |
| |
| // BorderFillBox radius clipping is taken care of by BackgroundBleedClipBackground |
| bool clipToBorderRadius = hasRoundedBorder && !(isBorderFill && bleedAvoidance == BackgroundBleedClipBackground); |
| GraphicsContextStateSaver clipToBorderStateSaver(*context, clipToBorderRadius); |
| if (clipToBorderRadius) { |
| RoundedRect border = isBorderFill ? backgroundRoundedRectAdjustedForBleedAvoidance(context, rect, bleedAvoidance, box, boxSize, includeLeftEdge, includeRightEdge) : getBackgroundRoundedRect(rect, box, boxSize.width(), boxSize.height(), includeLeftEdge, includeRightEdge); |
| |
| // Clip to the padding or content boxes as necessary. |
| if (bgLayer.clip() == ContentFillBox) { |
| border = style()->getRoundedInnerBorderFor(border.rect(), |
| paddingTop() + borderTop(), paddingBottom() + borderBottom(), paddingLeft() + borderLeft(), paddingRight() + borderRight(), includeLeftEdge, includeRightEdge); |
| } else if (bgLayer.clip() == PaddingFillBox) |
| border = style()->getRoundedInnerBorderFor(border.rect(), includeLeftEdge, includeRightEdge); |
| |
| clipRoundedInnerRect(context, rect, border); |
| } |
| |
| int bLeft = includeLeftEdge ? borderLeft() : 0; |
| int bRight = includeRightEdge ? borderRight() : 0; |
| LayoutUnit pLeft = includeLeftEdge ? paddingLeft() : LayoutUnit(); |
| LayoutUnit pRight = includeRightEdge ? paddingRight() : LayoutUnit(); |
| |
| GraphicsContextStateSaver clipWithScrollingStateSaver(*context, clippedWithLocalScrolling); |
| LayoutRect scrolledPaintRect = rect; |
| if (clippedWithLocalScrolling) { |
| // Clip to the overflow area. |
| RenderBox* thisBox = toRenderBox(this); |
| context->clip(thisBox->overflowClipRect(rect.location())); |
| |
| // Adjust the paint rect to reflect a scrolled content box with borders at the ends. |
| scrolledPaintRect.setWidth(bLeft + thisBox->clientWidth() + bRight); |
| scrolledPaintRect.setHeight(borderTop() + thisBox->clientHeight() + borderBottom()); |
| } |
| |
| GraphicsContextStateSaver backgroundClipStateSaver(*context, false); |
| |
| switch (bgLayer.clip()) { |
| case PaddingFillBox: |
| case ContentFillBox: { |
| if (clipToBorderRadius) |
| break; |
| |
| // Clip to the padding or content boxes as necessary. |
| bool includePadding = bgLayer.clip() == ContentFillBox; |
| LayoutRect clipRect = LayoutRect(scrolledPaintRect.x() + bLeft + (includePadding ? pLeft : LayoutUnit()), |
| scrolledPaintRect.y() + borderTop() + (includePadding ? paddingTop() : LayoutUnit()), |
| scrolledPaintRect.width() - bLeft - bRight - (includePadding ? pLeft + pRight : LayoutUnit()), |
| scrolledPaintRect.height() - borderTop() - borderBottom() - (includePadding ? paddingTop() + paddingBottom() : LayoutUnit())); |
| backgroundClipStateSaver.save(); |
| context->clip(clipRect); |
| |
| break; |
| } |
| case BorderFillBox: |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| break; |
| } |
| |
| // Paint the color first underneath all images, culled if background image occludes it. |
| // FIXME: In the bgLayer->hasFiniteBounds() case, we could improve the culling test |
| // by verifying whether the background image covers the entire layout rect. |
| if (isBottomLayer) { |
| IntRect backgroundRect(pixelSnappedIntRect(scrolledPaintRect)); |
| bool boxShadowShouldBeAppliedToBackground = this->boxShadowShouldBeAppliedToBackground(bleedAvoidance, box); |
| if (boxShadowShouldBeAppliedToBackground || !shouldPaintBackgroundImage || !bgLayer.hasOpaqueImage(this) || !bgLayer.hasRepeatXY()) { |
| if (!boxShadowShouldBeAppliedToBackground) |
| backgroundRect.intersect(paintInfo.rect); |
| |
| GraphicsContextStateSaver shadowStateSaver(*context, boxShadowShouldBeAppliedToBackground); |
| if (boxShadowShouldBeAppliedToBackground) |
| applyBoxShadowForBackground(context, this); |
| |
| if (bgColor.alpha()) |
| context->fillRect(backgroundRect, bgColor, context->compositeOperation()); |
| } |
| } |
| |
| // no progressive loading of the background image |
| if (shouldPaintBackgroundImage) { |
| BackgroundImageGeometry geometry; |
| calculateBackgroundImageGeometry(paintInfo.paintContainer(), bgLayer, scrolledPaintRect, geometry, backgroundObject); |
| geometry.clip(paintInfo.rect); |
| if (!geometry.destRect().isEmpty()) { |
| // FIXME(sky): Is it possible for the bgLayer to be something other that CompositeSourceOver? |
| CompositeOperator compositeOp = bgLayer.composite(); |
| RenderObject* clientForBackgroundImage = backgroundObject ? backgroundObject : this; |
| RefPtr<Image> image = bgImage->image(clientForBackgroundImage, geometry.tileSize()); |
| InterpolationQuality previousInterpolationQuality = context->imageInterpolationQuality(); |
| context->setImageInterpolationQuality(InterpolationLow); |
| context->drawTiledImage(image.get(), geometry.destRect(), geometry.relativePhase(), geometry.tileSize(), |
| compositeOp, bgLayer.blendMode(), geometry.spaceSize()); |
| context->setImageInterpolationQuality(previousInterpolationQuality); |
| } |
| } |
| } |
| |
| static inline int resolveWidthForRatio(int height, const FloatSize& intrinsicRatio) |
| { |
| return ceilf(height * intrinsicRatio.width() / intrinsicRatio.height()); |
| } |
| |
| static inline int resolveHeightForRatio(int width, const FloatSize& intrinsicRatio) |
| { |
| return ceilf(width * intrinsicRatio.height() / intrinsicRatio.width()); |
| } |
| |
| static inline IntSize resolveAgainstIntrinsicWidthOrHeightAndRatio(const IntSize& size, const FloatSize& intrinsicRatio, int useWidth, int useHeight) |
| { |
| if (intrinsicRatio.isEmpty()) { |
| if (useWidth) |
| return IntSize(useWidth, size.height()); |
| return IntSize(size.width(), useHeight); |
| } |
| |
| if (useWidth) |
| return IntSize(useWidth, resolveHeightForRatio(useWidth, intrinsicRatio)); |
| return IntSize(resolveWidthForRatio(useHeight, intrinsicRatio), useHeight); |
| } |
| |
| static inline IntSize resolveAgainstIntrinsicRatio(const IntSize& size, const FloatSize& intrinsicRatio) |
| { |
| // Two possible solutions: (size.width(), solutionHeight) or (solutionWidth, size.height()) |
| // "... must be assumed to be the largest dimensions..." = easiest answer: the rect with the largest surface area. |
| |
| int solutionWidth = resolveWidthForRatio(size.height(), intrinsicRatio); |
| int solutionHeight = resolveHeightForRatio(size.width(), intrinsicRatio); |
| if (solutionWidth <= size.width()) { |
| if (solutionHeight <= size.height()) { |
| // If both solutions fit, choose the one covering the larger area. |
| int areaOne = solutionWidth * size.height(); |
| int areaTwo = size.width() * solutionHeight; |
| if (areaOne < areaTwo) |
| return IntSize(size.width(), solutionHeight); |
| return IntSize(solutionWidth, size.height()); |
| } |
| |
| // Only the first solution fits. |
| return IntSize(solutionWidth, size.height()); |
| } |
| |
| // Only the second solution fits, assert that. |
| ASSERT(solutionHeight <= size.height()); |
| return IntSize(size.width(), solutionHeight); |
| } |
| |
| IntSize RenderBoxModelObject::calculateImageIntrinsicDimensions(StyleImage* image, const IntSize& positioningAreaSize) const |
| { |
| // A generated image without a fixed size, will always return the container size as intrinsic size. |
| if (image->isGeneratedImage() && image->usesImageContainerSize()) |
| return IntSize(positioningAreaSize.width(), positioningAreaSize.height()); |
| |
| Length intrinsicWidth; |
| Length intrinsicHeight; |
| FloatSize intrinsicRatio; |
| image->computeIntrinsicDimensions(this, intrinsicWidth, intrinsicHeight, intrinsicRatio); |
| |
| ASSERT(!intrinsicWidth.isPercent()); |
| ASSERT(!intrinsicHeight.isPercent()); |
| |
| IntSize resolvedSize(intrinsicWidth.value(), intrinsicHeight.value()); |
| IntSize minimumSize(resolvedSize.width() > 0 ? 1 : 0, resolvedSize.height() > 0 ? 1 : 0); |
| resolvedSize.clampToMinimumSize(minimumSize); |
| |
| if (!resolvedSize.isEmpty()) |
| return resolvedSize; |
| |
| // If the image has one of either an intrinsic width or an intrinsic height: |
| // * and an intrinsic aspect ratio, then the missing dimension is calculated from the given dimension and the ratio. |
| // * and no intrinsic aspect ratio, then the missing dimension is assumed to be the size of the rectangle that |
| // establishes the coordinate system for the 'background-position' property. |
| if (resolvedSize.width() > 0 || resolvedSize.height() > 0) |
| return resolveAgainstIntrinsicWidthOrHeightAndRatio(positioningAreaSize, intrinsicRatio, resolvedSize.width(), resolvedSize.height()); |
| |
| // If the image has no intrinsic dimensions and has an intrinsic ratio the dimensions must be assumed to be the |
| // largest dimensions at that ratio such that neither dimension exceeds the dimensions of the rectangle that |
| // establishes the coordinate system for the 'background-position' property. |
| if (!intrinsicRatio.isEmpty()) |
| return resolveAgainstIntrinsicRatio(positioningAreaSize, intrinsicRatio); |
| |
| // If the image has no intrinsic ratio either, then the dimensions must be assumed to be the rectangle that |
| // establishes the coordinate system for the 'background-position' property. |
| return positioningAreaSize; |
| } |
| |
| static inline void applySubPixelHeuristicForTileSize(LayoutSize& tileSize, const IntSize& positioningAreaSize) |
| { |
| tileSize.setWidth(positioningAreaSize.width() - tileSize.width() <= 1 ? tileSize.width().ceil() : tileSize.width().floor()); |
| tileSize.setHeight(positioningAreaSize.height() - tileSize.height() <= 1 ? tileSize.height().ceil() : tileSize.height().floor()); |
| } |
| |
| IntSize RenderBoxModelObject::calculateFillTileSize(const FillLayer& fillLayer, const IntSize& positioningAreaSize) const |
| { |
| StyleImage* image = fillLayer.image(); |
| EFillSizeType type = fillLayer.size().type; |
| |
| IntSize imageIntrinsicSize = calculateImageIntrinsicDimensions(image, positioningAreaSize); |
| imageIntrinsicSize.scale(1 / image->imageScaleFactor(), 1 / image->imageScaleFactor()); |
| switch (type) { |
| case SizeLength: { |
| LayoutSize tileSize = positioningAreaSize; |
| |
| Length layerWidth = fillLayer.size().size.width(); |
| Length layerHeight = fillLayer.size().size.height(); |
| |
| if (layerWidth.isFixed()) |
| tileSize.setWidth(layerWidth.value()); |
| else if (layerWidth.isPercent()) |
| tileSize.setWidth(valueForLength(layerWidth, positioningAreaSize.width())); |
| |
| if (layerHeight.isFixed()) |
| tileSize.setHeight(layerHeight.value()); |
| else if (layerHeight.isPercent()) |
| tileSize.setHeight(valueForLength(layerHeight, positioningAreaSize.height())); |
| |
| applySubPixelHeuristicForTileSize(tileSize, positioningAreaSize); |
| |
| // If one of the values is auto we have to use the appropriate |
| // scale to maintain our aspect ratio. |
| if (layerWidth.isAuto() && !layerHeight.isAuto()) { |
| if (imageIntrinsicSize.height()) |
| tileSize.setWidth(imageIntrinsicSize.width() * tileSize.height() / imageIntrinsicSize.height()); |
| } else if (!layerWidth.isAuto() && layerHeight.isAuto()) { |
| if (imageIntrinsicSize.width()) |
| tileSize.setHeight(imageIntrinsicSize.height() * tileSize.width() / imageIntrinsicSize.width()); |
| } else if (layerWidth.isAuto() && layerHeight.isAuto()) { |
| // If both width and height are auto, use the image's intrinsic size. |
| tileSize = imageIntrinsicSize; |
| } |
| |
| tileSize.clampNegativeToZero(); |
| return flooredIntSize(tileSize); |
| } |
| case SizeNone: { |
| // If both values are ‘auto’ then the intrinsic width and/or height of the image should be used, if any. |
| if (!imageIntrinsicSize.isEmpty()) |
| return imageIntrinsicSize; |
| |
| // If the image has neither an intrinsic width nor an intrinsic height, its size is determined as for ‘contain’. |
| type = Contain; |
| } |
| case Contain: |
| case Cover: { |
| float horizontalScaleFactor = imageIntrinsicSize.width() |
| ? static_cast<float>(positioningAreaSize.width()) / imageIntrinsicSize.width() : 1; |
| float verticalScaleFactor = imageIntrinsicSize.height() |
| ? static_cast<float>(positioningAreaSize.height()) / imageIntrinsicSize.height() : 1; |
| float scaleFactor = type == Contain ? std::min(horizontalScaleFactor, verticalScaleFactor) : std::max(horizontalScaleFactor, verticalScaleFactor); |
| return IntSize(std::max(1l, lround(imageIntrinsicSize.width() * scaleFactor)), std::max(1l, lround(imageIntrinsicSize.height() * scaleFactor))); |
| } |
| } |
| |
| ASSERT_NOT_REACHED(); |
| return IntSize(); |
| } |
| |
| void RenderBoxModelObject::BackgroundImageGeometry::setNoRepeatX(int xOffset) |
| { |
| m_destRect.move(std::max(xOffset, 0), 0); |
| m_phase.setX(-std::min(xOffset, 0)); |
| m_destRect.setWidth(m_tileSize.width() + std::min(xOffset, 0)); |
| } |
| void RenderBoxModelObject::BackgroundImageGeometry::setNoRepeatY(int yOffset) |
| { |
| m_destRect.move(0, std::max(yOffset, 0)); |
| m_phase.setY(-std::min(yOffset, 0)); |
| m_destRect.setHeight(m_tileSize.height() + std::min(yOffset, 0)); |
| } |
| |
| void RenderBoxModelObject::BackgroundImageGeometry::useFixedAttachment(const IntPoint& attachmentPoint) |
| { |
| IntPoint alignedPoint = attachmentPoint; |
| m_phase.move(std::max(alignedPoint.x() - m_destRect.x(), 0), std::max(alignedPoint.y() - m_destRect.y(), 0)); |
| } |
| |
| void RenderBoxModelObject::BackgroundImageGeometry::clip(const IntRect& clipRect) |
| { |
| m_destRect.intersect(clipRect); |
| } |
| |
| IntPoint RenderBoxModelObject::BackgroundImageGeometry::relativePhase() const |
| { |
| IntPoint phase = m_phase; |
| phase += m_destRect.location() - m_destOrigin; |
| return phase; |
| } |
| |
| static inline int getSpace(int areaSize, int tileSize) |
| { |
| int numberOfTiles = areaSize / tileSize; |
| int space = -1; |
| |
| if (numberOfTiles > 1) |
| space = lroundf((float)(areaSize - numberOfTiles * tileSize) / (numberOfTiles - 1)); |
| |
| return space; |
| } |
| |
| void RenderBoxModelObject::calculateBackgroundImageGeometry(const RenderBox* paintContainer, const FillLayer& fillLayer, const LayoutRect& paintRect, |
| BackgroundImageGeometry& geometry, RenderObject* backgroundObject) const |
| { |
| LayoutUnit left = 0; |
| LayoutUnit top = 0; |
| IntSize positioningAreaSize; |
| IntRect snappedPaintRect = pixelSnappedIntRect(paintRect); |
| |
| // Determine the background positioning area and set destRect to the background painting area. |
| // destRect will be adjusted later if the background is non-repeating. |
| // FIXME: transforms spec says that fixed backgrounds behave like scroll inside transforms. |
| bool fixedAttachment = fillLayer.attachment() == FixedBackgroundAttachment; |
| if (!fixedAttachment) { |
| geometry.setDestRect(snappedPaintRect); |
| |
| LayoutUnit right = 0; |
| LayoutUnit bottom = 0; |
| // Scroll and Local. |
| if (fillLayer.origin() != BorderFillBox) { |
| left = borderLeft(); |
| right = borderRight(); |
| top = borderTop(); |
| bottom = borderBottom(); |
| if (fillLayer.origin() == ContentFillBox) { |
| left += paddingLeft(); |
| right += paddingRight(); |
| top += paddingTop(); |
| bottom += paddingBottom(); |
| } |
| } |
| |
| positioningAreaSize = pixelSnappedIntSize(paintRect.size() - LayoutSize(left + right, top + bottom), paintRect.location()); |
| } else { |
| geometry.setHasNonLocalGeometry(); |
| |
| IntRect viewportRect = pixelSnappedIntRect(viewRect()); |
| |
| if (paintContainer) { |
| IntPoint absoluteContainerOffset = roundedIntPoint(paintContainer->localToAbsolute(FloatPoint())); |
| viewportRect.moveBy(-absoluteContainerOffset); |
| } |
| |
| geometry.setDestRect(pixelSnappedIntRect(viewportRect)); |
| positioningAreaSize = geometry.destRect().size(); |
| } |
| |
| const RenderObject* clientForBackgroundImage = backgroundObject ? backgroundObject : this; |
| IntSize fillTileSize = calculateFillTileSize(fillLayer, positioningAreaSize); |
| fillLayer.image()->setContainerSizeForRenderer(clientForBackgroundImage, fillTileSize); |
| geometry.setTileSize(fillTileSize); |
| |
| EFillRepeat backgroundRepeatX = fillLayer.repeatX(); |
| EFillRepeat backgroundRepeatY = fillLayer.repeatY(); |
| int availableWidth = positioningAreaSize.width() - geometry.tileSize().width(); |
| int availableHeight = positioningAreaSize.height() - geometry.tileSize().height(); |
| |
| LayoutUnit computedXPosition = roundedMinimumValueForLength(fillLayer.xPosition(), availableWidth); |
| if (backgroundRepeatX == RoundFill && positioningAreaSize.width() > 0 && fillTileSize.width() > 0) { |
| long nrTiles = std::max(1l, lroundf((float)positioningAreaSize.width() / fillTileSize.width())); |
| |
| if (fillLayer.size().size.height().isAuto() && backgroundRepeatY != RoundFill) { |
| fillTileSize.setHeight(fillTileSize.height() * positioningAreaSize.width() / (nrTiles * fillTileSize.width())); |
| } |
| |
| fillTileSize.setWidth(positioningAreaSize.width() / nrTiles); |
| geometry.setTileSize(fillTileSize); |
| geometry.setPhaseX(geometry.tileSize().width() ? geometry.tileSize().width() - roundToInt(computedXPosition + left) % geometry.tileSize().width() : 0); |
| geometry.setSpaceSize(IntSize()); |
| } |
| |
| LayoutUnit computedYPosition = roundedMinimumValueForLength(fillLayer.yPosition(), availableHeight); |
| if (backgroundRepeatY == RoundFill && positioningAreaSize.height() > 0 && fillTileSize.height() > 0) { |
| long nrTiles = std::max(1l, lroundf((float)positioningAreaSize.height() / fillTileSize.height())); |
| |
| if (fillLayer.size().size.width().isAuto() && backgroundRepeatX != RoundFill) { |
| fillTileSize.setWidth(fillTileSize.width() * positioningAreaSize.height() / (nrTiles * fillTileSize.height())); |
| } |
| |
| fillTileSize.setHeight(positioningAreaSize.height() / nrTiles); |
| geometry.setTileSize(fillTileSize); |
| geometry.setPhaseY(geometry.tileSize().height() ? geometry.tileSize().height() - roundToInt(computedYPosition + top) % geometry.tileSize().height() : 0); |
| geometry.setSpaceSize(IntSize()); |
| } |
| |
| if (backgroundRepeatX == RepeatFill) { |
| geometry.setPhaseX(geometry.tileSize().width() ? geometry.tileSize().width() - roundToInt(computedXPosition + left) % geometry.tileSize().width() : 0); |
| geometry.setSpaceSize(IntSize()); |
| } else if (backgroundRepeatX == SpaceFill && fillTileSize.width() > 0) { |
| int space = getSpace(positioningAreaSize.width(), geometry.tileSize().width()); |
| int actualWidth = geometry.tileSize().width() + space; |
| |
| if (space >= 0) { |
| computedXPosition = roundedMinimumValueForLength(Length(), availableWidth); |
| geometry.setSpaceSize(IntSize(space, 0)); |
| geometry.setPhaseX(actualWidth ? actualWidth - roundToInt(computedXPosition + left) % actualWidth : 0); |
| } else { |
| backgroundRepeatX = NoRepeatFill; |
| } |
| } |
| if (backgroundRepeatX == NoRepeatFill) { |
| int xOffset = fillLayer.backgroundXOrigin() == RightEdge ? availableWidth - computedXPosition : computedXPosition; |
| geometry.setNoRepeatX(left + xOffset); |
| geometry.setSpaceSize(IntSize(0, geometry.spaceSize().height())); |
| } |
| |
| if (backgroundRepeatY == RepeatFill) { |
| geometry.setPhaseY(geometry.tileSize().height() ? geometry.tileSize().height() - roundToInt(computedYPosition + top) % geometry.tileSize().height() : 0); |
| geometry.setSpaceSize(IntSize(geometry.spaceSize().width(), 0)); |
| } else if (backgroundRepeatY == SpaceFill && fillTileSize.height() > 0) { |
| int space = getSpace(positioningAreaSize.height(), geometry.tileSize().height()); |
| int actualHeight = geometry.tileSize().height() + space; |
| |
| if (space >= 0) { |
| computedYPosition = roundedMinimumValueForLength(Length(), availableHeight); |
| geometry.setSpaceSize(IntSize(geometry.spaceSize().width(), space)); |
| geometry.setPhaseY(actualHeight ? actualHeight - roundToInt(computedYPosition + top) % actualHeight : 0); |
| } else { |
| backgroundRepeatY = NoRepeatFill; |
| } |
| } |
| if (backgroundRepeatY == NoRepeatFill) { |
| int yOffset = fillLayer.backgroundYOrigin() == BottomEdge ? availableHeight - computedYPosition : computedYPosition; |
| geometry.setNoRepeatY(top + yOffset); |
| geometry.setSpaceSize(IntSize(geometry.spaceSize().width(), 0)); |
| } |
| |
| if (fixedAttachment) |
| geometry.useFixedAttachment(snappedPaintRect.location()); |
| |
| geometry.clip(snappedPaintRect); |
| geometry.setDestOrigin(geometry.destRect().location()); |
| } |
| |
| class BorderEdge { |
| public: |
| BorderEdge(int edgeWidth, const Color& edgeColor, EBorderStyle edgeStyle, bool edgeIsTransparent, bool edgeIsPresent = true) |
| : width(edgeWidth) |
| , color(edgeColor) |
| , style(edgeStyle) |
| , isTransparent(edgeIsTransparent) |
| , isPresent(edgeIsPresent) |
| { |
| if (style == DOUBLE && edgeWidth < 3) |
| style = SOLID; |
| } |
| |
| BorderEdge() |
| : width(0) |
| , style(BHIDDEN) |
| , isTransparent(false) |
| , isPresent(false) |
| { |
| } |
| |
| bool hasVisibleColorAndStyle() const { return style > BHIDDEN && !isTransparent; } |
| bool shouldRender() const { return isPresent && width && hasVisibleColorAndStyle(); } |
| bool presentButInvisible() const { return usedWidth() && !hasVisibleColorAndStyle(); } |
| bool obscuresBackgroundEdge(float scale) const |
| { |
| if (!isPresent || isTransparent || (width * scale) < 2 || color.hasAlpha() || style == BHIDDEN) |
| return false; |
| |
| if (style == DOTTED || style == DASHED) |
| return false; |
| |
| if (style == DOUBLE) |
| return width >= 5 * scale; // The outer band needs to be >= 2px wide at unit scale. |
| |
| return true; |
| } |
| bool obscuresBackground() const |
| { |
| if (!isPresent || isTransparent || color.hasAlpha() || style == BHIDDEN) |
| return false; |
| |
| if (style == DOTTED || style == DASHED || style == DOUBLE) |
| return false; |
| |
| return true; |
| } |
| |
| int usedWidth() const { return isPresent ? width : 0; } |
| |
| void getDoubleBorderStripeWidths(int& outerWidth, int& innerWidth) const |
| { |
| int fullWidth = usedWidth(); |
| outerWidth = fullWidth / 3; |
| innerWidth = fullWidth * 2 / 3; |
| |
| // We need certain integer rounding results |
| if (fullWidth % 3 == 2) |
| outerWidth += 1; |
| |
| if (fullWidth % 3 == 1) |
| innerWidth += 1; |
| } |
| |
| int width; |
| Color color; |
| EBorderStyle style; |
| bool isTransparent; |
| bool isPresent; |
| }; |
| |
| static bool allCornersClippedOut(const RoundedRect& border, const LayoutRect& clipRect) |
| { |
| LayoutRect boundingRect = border.rect(); |
| if (clipRect.contains(boundingRect)) |
| return false; |
| |
| RoundedRect::Radii radii = border.radii(); |
| |
| LayoutRect topLeftRect(boundingRect.location(), radii.topLeft()); |
| if (clipRect.intersects(topLeftRect)) |
| return false; |
| |
| LayoutRect topRightRect(boundingRect.location(), radii.topRight()); |
| topRightRect.setX(boundingRect.maxX() - topRightRect.width()); |
| if (clipRect.intersects(topRightRect)) |
| return false; |
| |
| LayoutRect bottomLeftRect(boundingRect.location(), radii.bottomLeft()); |
| bottomLeftRect.setY(boundingRect.maxY() - bottomLeftRect.height()); |
| if (clipRect.intersects(bottomLeftRect)) |
| return false; |
| |
| LayoutRect bottomRightRect(boundingRect.location(), radii.bottomRight()); |
| bottomRightRect.setX(boundingRect.maxX() - bottomRightRect.width()); |
| bottomRightRect.setY(boundingRect.maxY() - bottomRightRect.height()); |
| if (clipRect.intersects(bottomRightRect)) |
| return false; |
| |
| return true; |
| } |
| |
| static bool borderWillArcInnerEdge(const LayoutSize& firstRadius, const FloatSize& secondRadius) |
| { |
| return !firstRadius.isZero() || !secondRadius.isZero(); |
| } |
| |
| enum BorderEdgeFlag { |
| TopBorderEdge = 1 << BSTop, |
| RightBorderEdge = 1 << BSRight, |
| BottomBorderEdge = 1 << BSBottom, |
| LeftBorderEdge = 1 << BSLeft, |
| AllBorderEdges = TopBorderEdge | BottomBorderEdge | LeftBorderEdge | RightBorderEdge |
| }; |
| |
| static inline BorderEdgeFlag edgeFlagForSide(BoxSide side) |
| { |
| return static_cast<BorderEdgeFlag>(1 << side); |
| } |
| |
| static inline bool includesEdge(BorderEdgeFlags flags, BoxSide side) |
| { |
| return flags & edgeFlagForSide(side); |
| } |
| |
| static inline bool includesAdjacentEdges(BorderEdgeFlags flags) |
| { |
| return (flags & (TopBorderEdge | RightBorderEdge)) == (TopBorderEdge | RightBorderEdge) |
| || (flags & (RightBorderEdge | BottomBorderEdge)) == (RightBorderEdge | BottomBorderEdge) |
| || (flags & (BottomBorderEdge | LeftBorderEdge)) == (BottomBorderEdge | LeftBorderEdge) |
| || (flags & (LeftBorderEdge | TopBorderEdge)) == (LeftBorderEdge | TopBorderEdge); |
| } |
| |
| inline bool edgesShareColor(const BorderEdge& firstEdge, const BorderEdge& secondEdge) |
| { |
| return firstEdge.color == secondEdge.color; |
| } |
| |
| inline bool styleRequiresClipPolygon(EBorderStyle style) |
| { |
| return style == DOTTED || style == DASHED; // These are drawn with a stroke, so we have to clip to get corner miters. |
| } |
| |
| static bool borderStyleFillsBorderArea(EBorderStyle style) |
| { |
| return !(style == DOTTED || style == DASHED || style == DOUBLE); |
| } |
| |
| static bool borderStyleHasInnerDetail(EBorderStyle style) |
| { |
| return style == GROOVE || style == RIDGE || style == DOUBLE; |
| } |
| |
| static bool borderStyleIsDottedOrDashed(EBorderStyle style) |
| { |
| return style == DOTTED || style == DASHED; |
| } |
| |
| // OUTSET darkens the bottom and right (and maybe lightens the top and left) |
| // INSET darkens the top and left (and maybe lightens the bottom and right) |
| static inline bool borderStyleHasUnmatchedColorsAtCorner(EBorderStyle style, BoxSide side, BoxSide adjacentSide) |
| { |
| // These styles match at the top/left and bottom/right. |
| if (style == INSET || style == GROOVE || style == RIDGE || style == OUTSET) { |
| const BorderEdgeFlags topRightFlags = edgeFlagForSide(BSTop) | edgeFlagForSide(BSRight); |
| const BorderEdgeFlags bottomLeftFlags = edgeFlagForSide(BSBottom) | edgeFlagForSide(BSLeft); |
| |
| BorderEdgeFlags flags = edgeFlagForSide(side) | edgeFlagForSide(adjacentSide); |
| return flags == topRightFlags || flags == bottomLeftFlags; |
| } |
| return false; |
| } |
| |
| static inline bool colorsMatchAtCorner(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[]) |
| { |
| if (edges[side].shouldRender() != edges[adjacentSide].shouldRender()) |
| return false; |
| |
| if (!edgesShareColor(edges[side], edges[adjacentSide])) |
| return false; |
| |
| return !borderStyleHasUnmatchedColorsAtCorner(edges[side].style, side, adjacentSide); |
| } |
| |
| |
| static inline bool colorNeedsAntiAliasAtCorner(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[]) |
| { |
| if (!edges[side].color.hasAlpha()) |
| return false; |
| |
| if (edges[side].shouldRender() != edges[adjacentSide].shouldRender()) |
| return false; |
| |
| if (!edgesShareColor(edges[side], edges[adjacentSide])) |
| return true; |
| |
| return borderStyleHasUnmatchedColorsAtCorner(edges[side].style, side, adjacentSide); |
| } |
| |
| // This assumes that we draw in order: top, bottom, left, right. |
| static inline bool willBeOverdrawn(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[]) |
| { |
| switch (side) { |
| case BSTop: |
| case BSBottom: |
| if (edges[adjacentSide].presentButInvisible()) |
| return false; |
| |
| if (!edgesShareColor(edges[side], edges[adjacentSide]) && edges[adjacentSide].color.hasAlpha()) |
| return false; |
| |
| if (!borderStyleFillsBorderArea(edges[adjacentSide].style)) |
| return false; |
| |
| return true; |
| |
| case BSLeft: |
| case BSRight: |
| // These draw last, so are never overdrawn. |
| return false; |
| } |
| return false; |
| } |
| |
| static inline bool borderStylesRequireMitre(BoxSide side, BoxSide adjacentSide, EBorderStyle style, EBorderStyle adjacentStyle) |
| { |
| if (style == DOUBLE || adjacentStyle == DOUBLE || adjacentStyle == GROOVE || adjacentStyle == RIDGE) |
| return true; |
| |
| if (borderStyleIsDottedOrDashed(style) != borderStyleIsDottedOrDashed(adjacentStyle)) |
| return true; |
| |
| if (style != adjacentStyle) |
| return true; |
| |
| return borderStyleHasUnmatchedColorsAtCorner(style, side, adjacentSide); |
| } |
| |
| static bool joinRequiresMitre(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[], bool allowOverdraw) |
| { |
| if ((edges[side].isTransparent && edges[adjacentSide].isTransparent) || !edges[adjacentSide].isPresent) |
| return false; |
| |
| if (allowOverdraw && willBeOverdrawn(side, adjacentSide, edges)) |
| return false; |
| |
| if (!edgesShareColor(edges[side], edges[adjacentSide])) |
| return true; |
| |
| if (borderStylesRequireMitre(side, adjacentSide, edges[side].style, edges[adjacentSide].style)) |
| return true; |
| |
| return false; |
| } |
| |
| void RenderBoxModelObject::paintOneBorderSide(GraphicsContext* graphicsContext, const RenderStyle* style, const RoundedRect& outerBorder, const RoundedRect& innerBorder, |
| const IntRect& sideRect, BoxSide side, BoxSide adjacentSide1, BoxSide adjacentSide2, const BorderEdge edges[], const Path* path, |
| BackgroundBleedAvoidance bleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor) |
| { |
| const BorderEdge& edgeToRender = edges[side]; |
| ASSERT(edgeToRender.width); |
| const BorderEdge& adjacentEdge1 = edges[adjacentSide1]; |
| const BorderEdge& adjacentEdge2 = edges[adjacentSide2]; |
| |
| bool mitreAdjacentSide1 = joinRequiresMitre(side, adjacentSide1, edges, !antialias); |
| bool mitreAdjacentSide2 = joinRequiresMitre(side, adjacentSide2, edges, !antialias); |
| |
| bool adjacentSide1StylesMatch = colorsMatchAtCorner(side, adjacentSide1, edges); |
| bool adjacentSide2StylesMatch = colorsMatchAtCorner(side, adjacentSide2, edges); |
| |
| const Color& colorToPaint = overrideColor ? *overrideColor : edgeToRender.color; |
| |
| if (path) { |
| GraphicsContextStateSaver stateSaver(*graphicsContext); |
| if (innerBorder.isRenderable()) |
| clipBorderSidePolygon(graphicsContext, outerBorder, innerBorder, side, adjacentSide1StylesMatch, adjacentSide2StylesMatch); |
| else |
| clipBorderSideForComplexInnerPath(graphicsContext, outerBorder, innerBorder, side, edges); |
| float thickness = std::max(std::max(edgeToRender.width, adjacentEdge1.width), adjacentEdge2.width); |
| drawBoxSideFromPath(graphicsContext, outerBorder.rect(), *path, edges, edgeToRender.width, thickness, side, style, |
| colorToPaint, edgeToRender.style, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge); |
| } else { |
| bool clipForStyle = styleRequiresClipPolygon(edgeToRender.style) && (mitreAdjacentSide1 || mitreAdjacentSide2); |
| bool clipAdjacentSide1 = colorNeedsAntiAliasAtCorner(side, adjacentSide1, edges) && mitreAdjacentSide1; |
| bool clipAdjacentSide2 = colorNeedsAntiAliasAtCorner(side, adjacentSide2, edges) && mitreAdjacentSide2; |
| bool shouldClip = clipForStyle || clipAdjacentSide1 || clipAdjacentSide2; |
| |
| GraphicsContextStateSaver clipStateSaver(*graphicsContext, shouldClip); |
| if (shouldClip) { |
| bool aliasAdjacentSide1 = clipAdjacentSide1 || (clipForStyle && mitreAdjacentSide1); |
| bool aliasAdjacentSide2 = clipAdjacentSide2 || (clipForStyle && mitreAdjacentSide2); |
| clipBorderSidePolygon(graphicsContext, outerBorder, innerBorder, side, !aliasAdjacentSide1, !aliasAdjacentSide2); |
| // Since we clipped, no need to draw with a mitre. |
| mitreAdjacentSide1 = false; |
| mitreAdjacentSide2 = false; |
| } |
| |
| drawLineForBoxSide(graphicsContext, sideRect.x(), sideRect.y(), sideRect.maxX(), sideRect.maxY(), side, colorToPaint, edgeToRender.style, |
| mitreAdjacentSide1 ? adjacentEdge1.width : 0, mitreAdjacentSide2 ? adjacentEdge2.width : 0, antialias); |
| } |
| } |
| |
| static IntRect calculateSideRect(const RoundedRect& outerBorder, const BorderEdge edges[], int side) |
| { |
| IntRect sideRect = outerBorder.rect(); |
| int width = edges[side].width; |
| |
| if (side == BSTop) |
| sideRect.setHeight(width); |
| else if (side == BSBottom) |
| sideRect.shiftYEdgeTo(sideRect.maxY() - width); |
| else if (side == BSLeft) |
| sideRect.setWidth(width); |
| else |
| sideRect.shiftXEdgeTo(sideRect.maxX() - width); |
| |
| return sideRect; |
| } |
| |
| void RenderBoxModelObject::paintBorderSides(GraphicsContext* graphicsContext, const RenderStyle* style, const RoundedRect& outerBorder, const RoundedRect& innerBorder, |
| const IntPoint& innerBorderAdjustment, const BorderEdge edges[], BorderEdgeFlags edgeSet, BackgroundBleedAvoidance bleedAvoidance, |
| bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor) |
| { |
| bool renderRadii = outerBorder.isRounded(); |
| |
| Path roundedPath; |
| if (renderRadii) |
| roundedPath.addRoundedRect(outerBorder); |
| |
| // The inner border adjustment for bleed avoidance mode BackgroundBleedBackgroundOverBorder |
| // is only applied to sideRect, which is okay since BackgroundBleedBackgroundOverBorder |
| // is only to be used for solid borders and the shape of the border painted by drawBoxSideFromPath |
| // only depends on sideRect when painting solid borders. |
| |
| if (edges[BSTop].shouldRender() && includesEdge(edgeSet, BSTop)) { |
| IntRect sideRect = outerBorder.rect(); |
| sideRect.setHeight(edges[BSTop].width + innerBorderAdjustment.y()); |
| |
| bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSTop].style) || borderWillArcInnerEdge(innerBorder.radii().topLeft(), innerBorder.radii().topRight())); |
| paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSTop, BSLeft, BSRight, edges, usePath ? &roundedPath : 0, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor); |
| } |
| |
| if (edges[BSBottom].shouldRender() && includesEdge(edgeSet, BSBottom)) { |
| IntRect sideRect = outerBorder.rect(); |
| sideRect.shiftYEdgeTo(sideRect.maxY() - edges[BSBottom].width - innerBorderAdjustment.y()); |
| |
| bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSBottom].style) || borderWillArcInnerEdge(innerBorder.radii().bottomLeft(), innerBorder.radii().bottomRight())); |
| paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSBottom, BSLeft, BSRight, edges, usePath ? &roundedPath : 0, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor); |
| } |
| |
| if (edges[BSLeft].shouldRender() && includesEdge(edgeSet, BSLeft)) { |
| IntRect sideRect = outerBorder.rect(); |
| sideRect.setWidth(edges[BSLeft].width + innerBorderAdjustment.x()); |
| |
| bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSLeft].style) || borderWillArcInnerEdge(innerBorder.radii().bottomLeft(), innerBorder.radii().topLeft())); |
| paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSLeft, BSTop, BSBottom, edges, usePath ? &roundedPath : 0, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor); |
| } |
| |
| if (edges[BSRight].shouldRender() && includesEdge(edgeSet, BSRight)) { |
| IntRect sideRect = outerBorder.rect(); |
| sideRect.shiftXEdgeTo(sideRect.maxX() - edges[BSRight].width - innerBorderAdjustment.x()); |
| |
| bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSRight].style) || borderWillArcInnerEdge(innerBorder.radii().bottomRight(), innerBorder.radii().topRight())); |
| paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSRight, BSTop, BSBottom, edges, usePath ? &roundedPath : 0, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor); |
| } |
| } |
| |
| void RenderBoxModelObject::paintTranslucentBorderSides(GraphicsContext* graphicsContext, const RenderStyle* style, const RoundedRect& outerBorder, const RoundedRect& innerBorder, const IntPoint& innerBorderAdjustment, |
| const BorderEdge edges[], BorderEdgeFlags edgesToDraw, BackgroundBleedAvoidance bleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias) |
| { |
| // willBeOverdrawn assumes that we draw in order: top, bottom, left, right. |
| // This is different from BoxSide enum order. |
| static const BoxSide paintOrder[] = { BSTop, BSBottom, BSLeft, BSRight }; |
| |
| while (edgesToDraw) { |
| // Find undrawn edges sharing a color. |
| Color commonColor; |
| |
| BorderEdgeFlags commonColorEdgeSet = 0; |
| for (size_t i = 0; i < sizeof(paintOrder) / sizeof(paintOrder[0]); ++i) { |
| BoxSide currSide = paintOrder[i]; |
| if (!includesEdge(edgesToDraw, currSide)) |
| continue; |
| |
| bool includeEdge; |
| if (!commonColorEdgeSet) { |
| commonColor = edges[currSide].color; |
| includeEdge = true; |
| } else |
| includeEdge = edges[currSide].color == commonColor; |
| |
| if (includeEdge) |
| commonColorEdgeSet |= edgeFlagForSide(currSide); |
| } |
| |
| bool useTransparencyLayer = includesAdjacentEdges(commonColorEdgeSet) && commonColor.hasAlpha(); |
| if (useTransparencyLayer) { |
| graphicsContext->beginTransparencyLayer(static_cast<float>(commonColor.alpha()) / 255); |
| commonColor = Color(commonColor.red(), commonColor.green(), commonColor.blue()); |
| } |
| |
| paintBorderSides(graphicsContext, style, outerBorder, innerBorder, innerBorderAdjustment, edges, commonColorEdgeSet, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, &commonColor); |
| |
| if (useTransparencyLayer) |
| graphicsContext->endLayer(); |
| |
| edgesToDraw &= ~commonColorEdgeSet; |
| } |
| } |
| |
| void RenderBoxModelObject::paintBorder(const PaintInfo& info, const LayoutRect& rect, const RenderStyle* style, |
| BackgroundBleedAvoidance bleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) |
| { |
| GraphicsContext* graphicsContext = info.context; |
| |
| BorderEdge edges[4]; |
| getBorderEdgeInfo(edges, style, includeLogicalLeftEdge, includeLogicalRightEdge); |
| RoundedRect outerBorder = style->getRoundedBorderFor(rect, includeLogicalLeftEdge, includeLogicalRightEdge); |
| RoundedRect innerBorder = style->getRoundedInnerBorderFor(borderInnerRectAdjustedForBleedAvoidance(graphicsContext, rect, bleedAvoidance), includeLogicalLeftEdge, includeLogicalRightEdge); |
| |
| if (outerBorder.rect().isEmpty()) |
| return; |
| |
| bool haveAlphaColor = false; |
| bool haveAllSolidEdges = true; |
| bool haveAllDoubleEdges = true; |
| int numEdgesVisible = 4; |
| bool allEdgesShareColor = true; |
| bool allEdgesShareWidth = true; |
| int firstVisibleEdge = -1; |
| BorderEdgeFlags edgesToDraw = 0; |
| |
| for (int i = BSTop; i <= BSLeft; ++i) { |
| const BorderEdge& currEdge = edges[i]; |
| |
| if (edges[i].shouldRender()) |
| edgesToDraw |= edgeFlagForSide(static_cast<BoxSide>(i)); |
| |
| if (currEdge.presentButInvisible()) { |
| --numEdgesVisible; |
| allEdgesShareColor = false; |
| allEdgesShareWidth = false; |
| continue; |
| } |
| |
| if (!currEdge.shouldRender()) { |
| --numEdgesVisible; |
| continue; |
| } |
| |
| if (firstVisibleEdge == -1) { |
| firstVisibleEdge = i; |
| } else { |
| if (currEdge.color != edges[firstVisibleEdge].color) |
| allEdgesShareColor = false; |
| if (currEdge.width != edges[firstVisibleEdge].width) |
| allEdgesShareWidth = false; |
| } |
| |
| if (currEdge.color.hasAlpha()) |
| haveAlphaColor = true; |
| |
| if (currEdge.style != SOLID) |
| haveAllSolidEdges = false; |
| |
| if (currEdge.style != DOUBLE) |
| haveAllDoubleEdges = false; |
| } |
| |
| // If no corner intersects the clip region, we can pretend outerBorder is |
| // rectangular to improve performance. |
| if (haveAllSolidEdges && outerBorder.isRounded() && allCornersClippedOut(outerBorder, info.rect)) |
| outerBorder.setRadii(RoundedRect::Radii()); |
| |
| // isRenderable() check avoids issue described in https://bugs.webkit.org/show_bug.cgi?id=38787 |
| if ((haveAllSolidEdges || haveAllDoubleEdges) && allEdgesShareColor && innerBorder.isRenderable()) { |
| // Fast path for drawing all solid edges and all unrounded double edges |
| |
| if (numEdgesVisible == 4 && (outerBorder.isRounded() || haveAlphaColor) |
| && (haveAllSolidEdges || (!outerBorder.isRounded() && !innerBorder.isRounded()))) { |
| Path path; |
| |
| if (outerBorder.isRounded() && allEdgesShareWidth) { |
| |
| // Very fast path for single stroked round rect with circular corners |
| |
| graphicsContext->fillBetweenRoundedRects(outerBorder, innerBorder, edges[firstVisibleEdge].color); |
| return; |
| } |
| if (outerBorder.isRounded() && bleedAvoidance != BackgroundBleedClipBackground) |
| path.addRoundedRect(outerBorder); |
| else |
| path.addRect(outerBorder.rect()); |
| |
| if (haveAllDoubleEdges) { |
| IntRect innerThirdRect = outerBorder.rect(); |
| IntRect outerThirdRect = outerBorder.rect(); |
| for (int side = BSTop; side <= BSLeft; ++side) { |
| int outerWidth; |
| int innerWidth; |
| edges[side].getDoubleBorderStripeWidths(outerWidth, innerWidth); |
| |
| if (side == BSTop) { |
| innerThirdRect.shiftYEdgeTo(innerThirdRect.y() + innerWidth); |
| outerThirdRect.shiftYEdgeTo(outerThirdRect.y() + outerWidth); |
| } else if (side == BSBottom) { |
| innerThirdRect.setHeight(innerThirdRect.height() - innerWidth); |
| outerThirdRect.setHeight(outerThirdRect.height() - outerWidth); |
| } else if (side == BSLeft) { |
| innerThirdRect.shiftXEdgeTo(innerThirdRect.x() + innerWidth); |
| outerThirdRect.shiftXEdgeTo(outerThirdRect.x() + outerWidth); |
| } else { |
| innerThirdRect.setWidth(innerThirdRect.width() - innerWidth); |
| outerThirdRect.setWidth(outerThirdRect.width() - outerWidth); |
| } |
| } |
| |
| RoundedRect outerThird = outerBorder; |
| RoundedRect innerThird = innerBorder; |
| innerThird.setRect(innerThirdRect); |
| outerThird.setRect(outerThirdRect); |
| |
| if (outerThird.isRounded() && bleedAvoidance != BackgroundBleedClipBackground) |
| path.addRoundedRect(outerThird); |
| else |
| path.addRect(outerThird.rect()); |
| |
| if (innerThird.isRounded() && bleedAvoidance != BackgroundBleedClipBackground) |
| path.addRoundedRect(innerThird); |
| else |
| path.addRect(innerThird.rect()); |
| } |
| |
| if (innerBorder.isRounded()) |
| path.addRoundedRect(innerBorder); |
| else |
| path.addRect(innerBorder.rect()); |
| |
| graphicsContext->setFillRule(RULE_EVENODD); |
| graphicsContext->setFillColor(edges[firstVisibleEdge].color); |
| graphicsContext->fillPath(path); |
| return; |
| } |
| // Avoid creating transparent layers |
| if (haveAllSolidEdges && numEdgesVisible != 4 && !outerBorder.isRounded() && haveAlphaColor) { |
| Path path; |
| |
| for (int i = BSTop; i <= BSLeft; ++i) { |
| const BorderEdge& currEdge = edges[i]; |
| if (currEdge.shouldRender()) { |
| IntRect sideRect = calculateSideRect(outerBorder, edges, i); |
| path.addRect(sideRect); |
| } |
| } |
| |
| graphicsContext->setFillRule(RULE_NONZERO); |
| graphicsContext->setFillColor(edges[firstVisibleEdge].color); |
| graphicsContext->fillPath(path); |
| return; |
| } |
| } |
| |
| bool clipToOuterBorder = outerBorder.isRounded(); |
| GraphicsContextStateSaver stateSaver(*graphicsContext, clipToOuterBorder); |
| if (clipToOuterBorder) { |
| // Clip to the inner and outer radii rects. |
| if (bleedAvoidance != BackgroundBleedClipBackground) |
| graphicsContext->clipRoundedRect(outerBorder); |
| // isRenderable() check avoids issue described in https://bugs.webkit.org/show_bug.cgi?id=38787 |
| // The inside will be clipped out later (in clipBorderSideForComplexInnerPath) |
| if (innerBorder.isRenderable() && !innerBorder.isEmpty()) |
| graphicsContext->clipOutRoundedRect(innerBorder); |
| } |
| |
| // If only one edge visible antialiasing doesn't create seams |
| bool antialias = shouldAntialiasLines(graphicsContext) || numEdgesVisible == 1; |
| RoundedRect unadjustedInnerBorder = (bleedAvoidance == BackgroundBleedBackgroundOverBorder) ? style->getRoundedInnerBorderFor(rect, includeLogicalLeftEdge, includeLogicalRightEdge) : innerBorder; |
| IntPoint innerBorderAdjustment(innerBorder.rect().x() - unadjustedInnerBorder.rect().x(), innerBorder.rect().y() - unadjustedInnerBorder.rect().y()); |
| if (haveAlphaColor) |
| paintTranslucentBorderSides(graphicsContext, style, outerBorder, unadjustedInnerBorder, innerBorderAdjustment, edges, edgesToDraw, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias); |
| else |
| paintBorderSides(graphicsContext, style, outerBorder, unadjustedInnerBorder, innerBorderAdjustment, edges, edgesToDraw, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias); |
| } |
| |
| void RenderBoxModelObject::drawBoxSideFromPath(GraphicsContext* graphicsContext, const LayoutRect& borderRect, const Path& borderPath, const BorderEdge edges[], |
| float thickness, float drawThickness, BoxSide side, const RenderStyle* style, Color color, EBorderStyle borderStyle, BackgroundBleedAvoidance bleedAvoidance, |
| bool includeLogicalLeftEdge, bool includeLogicalRightEdge) |
| { |
| if (thickness <= 0) |
| return; |
| |
| if (borderStyle == DOUBLE && thickness < 3) |
| borderStyle = SOLID; |
| |
| switch (borderStyle) { |
| case BNONE: |
| case BHIDDEN: |
| return; |
| case DOTTED: |
| case DASHED: { |
| graphicsContext->setStrokeColor(color); |
| |
| // The stroke is doubled here because the provided path is the |
| // outside edge of the border so half the stroke is clipped off. |
| // The extra multiplier is so that the clipping mask can antialias |
| // the edges to prevent jaggies. |
| graphicsContext->setStrokeThickness(drawThickness * 2 * 1.1f); |
| graphicsContext->setStrokeStyle(borderStyle == DASHED ? DashedStroke : DottedStroke); |
| |
| // If the number of dashes that fit in the path is odd and non-integral then we |
| // will have an awkwardly-sized dash at the end of the path. To try to avoid that |
| // here, we simply make the whitespace dashes ever so slightly bigger. |
| // FIXME: This could be even better if we tried to manipulate the dash offset |
| // and possibly the gapLength to get the corners dash-symmetrical. |
| float dashLength = thickness * ((borderStyle == DASHED) ? 3.0f : 1.0f); |
| float gapLength = dashLength; |
| float numberOfDashes = borderPath.length() / dashLength; |
| // Don't try to show dashes if we have less than 2 dashes + 2 gaps. |
| // FIXME: should do this test per side. |
| if (numberOfDashes >= 4) { |
| bool evenNumberOfFullDashes = !((int)numberOfDashes % 2); |
| bool integralNumberOfDashes = !(numberOfDashes - (int)numberOfDashes); |
| if (!evenNumberOfFullDashes && !integralNumberOfDashes) { |
| float numberOfGaps = numberOfDashes / 2; |
| gapLength += (dashLength / numberOfGaps); |
| } |
| |
| DashArray lineDash; |
| lineDash.append(dashLength); |
| lineDash.append(gapLength); |
| graphicsContext->setLineDash(lineDash, dashLength); |
| } |
| |
| // FIXME: stroking the border path causes issues with tight corners: |
| // https://bugs.webkit.org/show_bug.cgi?id=58711 |
| // Also, to get the best appearance we should stroke a path between the two borders. |
| graphicsContext->strokePath(borderPath); |
| return; |
| } |
| case DOUBLE: { |
| // Get the inner border rects for both the outer border line and the inner border line |
| int outerBorderTopWidth; |
| int innerBorderTopWidth; |
| edges[BSTop].getDoubleBorderStripeWidths(outerBorderTopWidth, innerBorderTopWidth); |
| |
| int outerBorderRightWidth; |
| int innerBorderRightWidth; |
| edges[BSRight].getDoubleBorderStripeWidths(outerBorderRightWidth, innerBorderRightWidth); |
| |
| int outerBorderBottomWidth; |
| int innerBorderBottomWidth; |
| edges[BSBottom].getDoubleBorderStripeWidths(outerBorderBottomWidth, innerBorderBottomWidth); |
| |
| int outerBorderLeftWidth; |
| int innerBorderLeftWidth; |
| edges[BSLeft].getDoubleBorderStripeWidths(outerBorderLeftWidth, innerBorderLeftWidth); |
| |
| // Draw inner border line |
| { |
| GraphicsContextStateSaver stateSaver(*graphicsContext); |
| RoundedRect innerClip = style->getRoundedInnerBorderFor(borderRect, |
| innerBorderTopWidth, innerBorderBottomWidth, innerBorderLeftWidth, innerBorderRightWidth, |
| includeLogicalLeftEdge, includeLogicalRightEdge); |
| |
| graphicsContext->clipRoundedRect(innerClip); |
| drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, SOLID, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge); |
| } |
| |
| // Draw outer border line |
| { |
| GraphicsContextStateSaver stateSaver(*graphicsContext); |
| LayoutRect outerRect = borderRect; |
| if (bleedAvoidance == BackgroundBleedClipBackground) { |
| outerRect.inflate(1); |
| ++outerBorderTopWidth; |
| ++outerBorderBottomWidth; |
| ++outerBorderLeftWidth; |
| ++outerBorderRightWidth; |
| } |
| |
| RoundedRect outerClip = style->getRoundedInnerBorderFor(outerRect, |
| outerBorderTopWidth, outerBorderBottomWidth, outerBorderLeftWidth, outerBorderRightWidth, |
| includeLogicalLeftEdge, includeLogicalRightEdge); |
| graphicsContext->clipOutRoundedRect(outerClip); |
| drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, SOLID, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge); |
| } |
| return; |
| } |
| case RIDGE: |
| case GROOVE: |
| { |
| EBorderStyle s1; |
| EBorderStyle s2; |
| if (borderStyle == GROOVE) { |
| s1 = INSET; |
| s2 = OUTSET; |
| } else { |
| s1 = OUTSET; |
| s2 = INSET; |
| } |
| |
| // Paint full border |
| drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, s1, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge); |
| |
| // Paint inner only |
| GraphicsContextStateSaver stateSaver(*graphicsContext); |
| LayoutUnit topWidth = edges[BSTop].usedWidth() / 2; |
| LayoutUnit bottomWidth = edges[BSBottom].usedWidth() / 2; |
| LayoutUnit leftWidth = edges[BSLeft].usedWidth() / 2; |
| LayoutUnit rightWidth = edges[BSRight].usedWidth() / 2; |
| |
| RoundedRect clipRect = style->getRoundedInnerBorderFor(borderRect, |
| topWidth, bottomWidth, leftWidth, rightWidth, |
| includeLogicalLeftEdge, includeLogicalRightEdge); |
| |
| graphicsContext->clipRoundedRect(clipRect); |
| drawBoxSideFromPath(graphicsContext, borderRect, borderPath, edges, thickness, drawThickness, side, style, color, s2, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge); |
| return; |
| } |
| case INSET: |
| if (side == BSTop || side == BSLeft) |
| color = color.dark(); |
| break; |
| case OUTSET: |
| if (side == BSBottom || side == BSRight) |
| color = color.dark(); |
| break; |
| default: |
| break; |
| } |
| |
| graphicsContext->setStrokeStyle(NoStroke); |
| graphicsContext->setFillColor(color); |
| graphicsContext->drawRect(pixelSnappedIntRect(borderRect)); |
| } |
| |
| void RenderBoxModelObject::clipBorderSidePolygon(GraphicsContext* graphicsContext, const RoundedRect& outerBorder, const RoundedRect& innerBorder, |
| BoxSide side, bool firstEdgeMatches, bool secondEdgeMatches) |
| { |
| FloatPoint quad[4]; |
| |
| const LayoutRect& outerRect = outerBorder.rect(); |
| const LayoutRect& innerRect = innerBorder.rect(); |
| |
| FloatPoint centerPoint(innerRect.location().x().toFloat() + innerRect.width().toFloat() / 2, innerRect.location().y().toFloat() + innerRect.height().toFloat() / 2); |
| |
| // For each side, create a quad that encompasses all parts of that side that may draw, |
| // including areas inside the innerBorder. |
| // |
| // 0----------------3 |
| // 0 \ / 0 |
| // |\ 1----------- 2 /| |
| // | 1 1 | |
| // | | | | |
| // | | | | |
| // | 2 2 | |
| // |/ 1------------2 \| |
| // 3 / \ 3 |
| // 0----------------3 |
| // |
| switch (side) { |
| case BSTop: |
| quad[0] = outerRect.minXMinYCorner(); |
| quad[1] = innerRect.minXMinYCorner(); |
| quad[2] = innerRect.maxXMinYCorner(); |
| quad[3] = outerRect.maxXMinYCorner(); |
| |
| if (!innerBorder.radii().topLeft().isZero()) { |
| findIntersection(quad[0], quad[1], |
| FloatPoint( |
| quad[1].x() + innerBorder.radii().topLeft().width(), |
| quad[1].y()), |
| FloatPoint( |
| quad[1].x(), |
| quad[1].y() + innerBorder.radii().topLeft().height()), |
| quad[1]); |
| } |
| |
| if (!innerBorder.radii().topRight().isZero()) { |
| findIntersection(quad[3], quad[2], |
| FloatPoint( |
| quad[2].x() - innerBorder.radii().topRight().width(), |
| quad[2].y()), |
| FloatPoint( |
| quad[2].x(), |
| quad[2].y() + innerBorder.radii().topRight().height()), |
| quad[2]); |
| } |
| break; |
| |
| case BSLeft: |
| quad[0] = outerRect.minXMinYCorner(); |
| quad[1] = innerRect.minXMinYCorner(); |
| quad[2] = innerRect.minXMaxYCorner(); |
| quad[3] = outerRect.minXMaxYCorner(); |
| |
| if (!innerBorder.radii().topLeft().isZero()) { |
| findIntersection(quad[0], quad[1], |
| FloatPoint( |
| quad[1].x() + innerBorder.radii().topLeft().width(), |
| quad[1].y()), |
| FloatPoint( |
| quad[1].x(), |
| quad[1].y() + innerBorder.radii().topLeft().height()), |
| quad[1]); |
| } |
| |
| if (!innerBorder.radii().bottomLeft().isZero()) { |
| findIntersection(quad[3], quad[2], |
| FloatPoint( |
| quad[2].x() + innerBorder.radii().bottomLeft().width(), |
| quad[2].y()), |
| FloatPoint( |
| quad[2].x(), |
| quad[2].y() - innerBorder.radii().bottomLeft().height()), |
| quad[2]); |
| } |
| break; |
| |
| case BSBottom: |
| quad[0] = outerRect.minXMaxYCorner(); |
| quad[1] = innerRect.minXMaxYCorner(); |
| quad[2] = innerRect.maxXMaxYCorner(); |
| quad[3] = outerRect.maxXMaxYCorner(); |
| |
| if (!innerBorder.radii().bottomLeft().isZero()) { |
| findIntersection(quad[0], quad[1], |
| FloatPoint( |
| quad[1].x() + innerBorder.radii().bottomLeft().width(), |
| quad[1].y()), |
| FloatPoint( |
| quad[1].x(), |
| quad[1].y() - innerBorder.radii().bottomLeft().height()), |
| quad[1]); |
| } |
| |
| if (!innerBorder.radii().bottomRight().isZero()) { |
| findIntersection(quad[3], quad[2], |
| FloatPoint( |
| quad[2].x() - innerBorder.radii().bottomRight().width(), |
| quad[2].y()), |
| FloatPoint( |
| quad[2].x(), |
| quad[2].y() - innerBorder.radii().bottomRight().height()), |
| quad[2]); |
| } |
| break; |
| |
| case BSRight: |
| quad[0] = outerRect.maxXMinYCorner(); |
| quad[1] = innerRect.maxXMinYCorner(); |
| quad[2] = innerRect.maxXMaxYCorner(); |
| quad[3] = outerRect.maxXMaxYCorner(); |
| |
| if (!innerBorder.radii().topRight().isZero()) { |
| findIntersection(quad[0], quad[1], |
| FloatPoint( |
| quad[1].x() - innerBorder.radii().topRight().width(), |
| quad[1].y()), |
| FloatPoint( |
| quad[1].x(), |
| quad[1].y() + innerBorder.radii().topRight().height()), |
| quad[1]); |
| } |
| |
| if (!innerBorder.radii().bottomRight().isZero()) { |
| findIntersection(quad[3], quad[2], |
| FloatPoint( |
| quad[2].x() - innerBorder.radii().bottomRight().width(), |
| quad[2].y()), |
| FloatPoint( |
| quad[2].x(), |
| quad[2].y() - innerBorder.radii().bottomRight().height()), |
| quad[2]); |
| } |
| break; |
| } |
| |
| // If the border matches both of its adjacent sides, don't anti-alias the clip, and |
| // if neither side matches, anti-alias the clip. |
| if (firstEdgeMatches == secondEdgeMatches) { |
| graphicsContext->clipConvexPolygon(4, quad, !firstEdgeMatches); |
| return; |
| } |
| |
| // If antialiasing settings for the first edge and second edge is different, |
| // they have to be addressed separately. We do this by breaking the quad into |
| // two parallelograms, made by moving quad[1] and quad[2]. |
| float ax = quad[1].x() - quad[0].x(); |
| float ay = quad[1].y() - quad[0].y(); |
| float bx = quad[2].x() - quad[1].x(); |
| float by = quad[2].y() - quad[1].y(); |
| float cx = quad[3].x() - quad[2].x(); |
| float cy = quad[3].y() - quad[2].y(); |
| |
| const static float kEpsilon = 1e-2f; |
| float r1, r2; |
| if (fabsf(bx) < kEpsilon && fabsf(by) < kEpsilon) { |
| // The quad was actually a triangle. |
| r1 = r2 = 1.0f; |
| } else { |
| // Extend parallelogram a bit to hide calculation error |
| const static float kExtendFill = 1e-2f; |
| |
| r1 = (-ax * by + ay * bx) / (cx * by - cy * bx) + kExtendFill; |
| r2 = (-cx * by + cy * bx) / (ax * by - ay * bx) + kExtendFill; |
| } |
| |
| FloatPoint firstQuad[4]; |
| firstQuad[0] = quad[0]; |
| firstQuad[1] = quad[1]; |
| firstQuad[2] = FloatPoint(quad[3].x() + r2 * ax, quad[3].y() + r2 * ay); |
| firstQuad[3] = quad[3]; |
| graphicsContext->clipConvexPolygon(4, firstQuad, !firstEdgeMatches); |
| |
| FloatPoint secondQuad[4]; |
| secondQuad[0] = quad[0]; |
| secondQuad[1] = FloatPoint(quad[0].x() - r1 * cx, quad[0].y() - r1 * cy); |
| secondQuad[2] = quad[2]; |
| secondQuad[3] = quad[3]; |
| graphicsContext->clipConvexPolygon(4, secondQuad, !secondEdgeMatches); |
| } |
| |
| static IntRect calculateSideRectIncludingInner(const RoundedRect& outerBorder, const BorderEdge edges[], BoxSide side) |
| { |
| IntRect sideRect = outerBorder.rect(); |
| int width; |
| |
| switch (side) { |
| case BSTop: |
| width = sideRect.height() - edges[BSBottom].width; |
| sideRect.setHeight(width); |
| break; |
| case BSBottom: |
| width = sideRect.height() - edges[BSTop].width; |
| sideRect.shiftYEdgeTo(sideRect.maxY() - width); |
| break; |
| case BSLeft: |
| width = sideRect.width() - edges[BSRight].width; |
| sideRect.setWidth(width); |
| break; |
| case BSRight: |
| width = sideRect.width() - edges[BSLeft].width; |
| sideRect.shiftXEdgeTo(sideRect.maxX() - width); |
| break; |
| } |
| |
| return sideRect; |
| } |
| |
| static RoundedRect calculateAdjustedInnerBorder(const RoundedRect&innerBorder, BoxSide side) |
| { |
| // Expand the inner border as necessary to make it a rounded rect (i.e. radii contained within each edge). |
| // This function relies on the fact we only get radii not contained within each edge if one of the radii |
| // for an edge is zero, so we can shift the arc towards the zero radius corner. |
| RoundedRect::Radii newRadii = innerBorder.radii(); |
| IntRect newRect = innerBorder.rect(); |
| |
| float overshoot; |
| float maxRadii; |
| |
| switch (side) { |
| case BSTop: |
| overshoot = newRadii.topLeft().width() + newRadii.topRight().width() - newRect.width(); |
| if (overshoot > 0) { |
| ASSERT(!(newRadii.topLeft().width() && newRadii.topRight().width())); |
| newRect.setWidth(newRect.width() + overshoot); |
| if (!newRadii.topLeft().width()) |
| newRect.move(-overshoot, 0); |
| } |
| newRadii.setBottomLeft(IntSize(0, 0)); |
| newRadii.setBottomRight(IntSize(0, 0)); |
| maxRadii = std::max(newRadii.topLeft().height(), newRadii.topRight().height()); |
| if (maxRadii > newRect.height()) |
| newRect.setHeight(maxRadii); |
| break; |
| |
| case BSBottom: |
| overshoot = newRadii.bottomLeft().width() + newRadii.bottomRight().width() - newRect.width(); |
| if (overshoot > 0) { |
| ASSERT(!(newRadii.bottomLeft().width() && newRadii.bottomRight().width())); |
| newRect.setWidth(newRect.width() + overshoot); |
| if (!newRadii.bottomLeft().width()) |
| newRect.move(-overshoot, 0); |
| } |
| newRadii.setTopLeft(IntSize(0, 0)); |
| newRadii.setTopRight(IntSize(0, 0)); |
| maxRadii = std::max(newRadii.bottomLeft().height(), newRadii.bottomRight().height()); |
| if (maxRadii > newRect.height()) { |
| newRect.move(0, newRect.height() - maxRadii); |
| newRect.setHeight(maxRadii); |
| } |
| break; |
| |
| case BSLeft: |
| overshoot = newRadii.topLeft().height() + newRadii.bottomLeft().height() - newRect.height(); |
| if (overshoot > 0) { |
| ASSERT(!(newRadii.topLeft().height() && newRadii.bottomLeft().height())); |
| newRect.setHeight(newRect.height() + overshoot); |
| if (!newRadii.topLeft().height()) |
| newRect.move(0, -overshoot); |
| } |
| newRadii.setTopRight(IntSize(0, 0)); |
| newRadii.setBottomRight(IntSize(0, 0)); |
| maxRadii = std::max(newRadii.topLeft().width(), newRadii.bottomLeft().width()); |
| if (maxRadii > newRect.width()) |
| newRect.setWidth(maxRadii); |
| break; |
| |
| case BSRight: |
| overshoot = newRadii.topRight().height() + newRadii.bottomRight().height() - newRect.height(); |
| if (overshoot > 0) { |
| ASSERT(!(newRadii.topRight().height() && newRadii.bottomRight().height())); |
| newRect.setHeight(newRect.height() + overshoot); |
| if (!newRadii.topRight().height()) |
| newRect.move(0, -overshoot); |
| } |
| newRadii.setTopLeft(IntSize(0, 0)); |
| newRadii.setBottomLeft(IntSize(0, 0)); |
| maxRadii = std::max(newRadii.topRight().width(), newRadii.bottomRight().width()); |
| if (maxRadii > newRect.width()) { |
| newRect.move(newRect.width() - maxRadii, 0); |
| newRect.setWidth(maxRadii); |
| } |
| break; |
| } |
| |
| return RoundedRect(newRect, newRadii); |
| } |
| |
| void RenderBoxModelObject::clipBorderSideForComplexInnerPath(GraphicsContext* graphicsContext, const RoundedRect& outerBorder, const RoundedRect& innerBorder, |
| BoxSide side, const class BorderEdge edges[]) |
| { |
| graphicsContext->clip(calculateSideRectIncludingInner(outerBorder, edges, side)); |
| RoundedRect adjustedInnerRect = calculateAdjustedInnerBorder(innerBorder, side); |
| if (!adjustedInnerRect.isEmpty()) |
| graphicsContext->clipOutRoundedRect(adjustedInnerRect); |
| } |
| |
| void RenderBoxModelObject::getBorderEdgeInfo(BorderEdge edges[], const RenderStyle* style, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const |
| { |
| edges[BSTop] = BorderEdge(style->borderTopWidth(), |
| resolveColor(style, CSSPropertyBorderTopColor), |
| style->borderTopStyle(), |
| style->borderTopIsTransparent(), |
| true); |
| |
| edges[BSRight] = BorderEdge(style->borderRightWidth(), |
| resolveColor(style, CSSPropertyBorderRightColor), |
| style->borderRightStyle(), |
| style->borderRightIsTransparent(), |
| includeLogicalRightEdge); |
| |
| edges[BSBottom] = BorderEdge(style->borderBottomWidth(), |
| resolveColor(style, CSSPropertyBorderBottomColor), |
| style->borderBottomStyle(), |
| style->borderBottomIsTransparent(), |
| true); |
| |
| edges[BSLeft] = BorderEdge(style->borderLeftWidth(), |
| resolveColor(style, CSSPropertyBorderLeftColor), |
| style->borderLeftStyle(), |
| style->borderLeftIsTransparent(), |
| includeLogicalLeftEdge); |
| } |
| |
| bool RenderBoxModelObject::borderObscuresBackgroundEdge(const FloatSize& contextScale) const |
| { |
| BorderEdge edges[4]; |
| getBorderEdgeInfo(edges, style()); |
| |
| for (int i = BSTop; i <= BSLeft; ++i) { |
| const BorderEdge& currEdge = edges[i]; |
| // FIXME: for vertical text |
| float axisScale = (i == BSTop || i == BSBottom) ? contextScale.height() : contextScale.width(); |
| if (!currEdge.obscuresBackgroundEdge(axisScale)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool RenderBoxModelObject::borderObscuresBackground() const |
| { |
| if (!style()->hasBorder()) |
| return false; |
| |
| BorderEdge edges[4]; |
| getBorderEdgeInfo(edges, style()); |
| |
| for (int i = BSTop; i <= BSLeft; ++i) { |
| const BorderEdge& currEdge = edges[i]; |
| if (!currEdge.obscuresBackground()) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool RenderBoxModelObject::boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance bleedAvoidance, InlineFlowBox* inlineFlowBox) const |
| { |
| if (bleedAvoidance != BackgroundBleedNone) |
| return false; |
| |
| const ShadowList* shadowList = style()->boxShadow(); |
| if (!shadowList) |
| return false; |
| |
| bool hasOneNormalBoxShadow = false; |
| size_t shadowCount = shadowList->shadows().size(); |
| for (size_t i = 0; i < shadowCount; ++i) { |
| const ShadowData& currentShadow = shadowList->shadows()[i]; |
| if (currentShadow.style() != Normal) |
| continue; |
| |
| if (hasOneNormalBoxShadow) |
| return false; |
| hasOneNormalBoxShadow = true; |
| |
| if (currentShadow.spread()) |
| return false; |
| } |
| |
| if (!hasOneNormalBoxShadow) |
| return false; |
| |
| Color backgroundColor = resolveColor(CSSPropertyBackgroundColor); |
| if (backgroundColor.hasAlpha()) |
| return false; |
| |
| const FillLayer* lastBackgroundLayer = &style()->backgroundLayers(); |
| for (const FillLayer* next = lastBackgroundLayer->next(); next; next = lastBackgroundLayer->next()) |
| lastBackgroundLayer = next; |
| |
| if (lastBackgroundLayer->clip() != BorderFillBox) |
| return false; |
| |
| if (lastBackgroundLayer->image() && style()->hasBorderRadius()) |
| return false; |
| |
| if (inlineFlowBox && !inlineFlowBox->boxShadowCanBeAppliedToBackground(*lastBackgroundLayer)) |
| return false; |
| |
| if (hasOverflowClip() && lastBackgroundLayer->attachment() == LocalBackgroundAttachment) |
| return false; |
| |
| return true; |
| } |
| |
| void RenderBoxModelObject::paintBoxShadow(const PaintInfo& info, const LayoutRect& paintRect, const RenderStyle* s, ShadowStyle shadowStyle, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) |
| { |
| // FIXME: Deal with border-image. Would be great to use border-image as a mask. |
| GraphicsContext* context = info.context; |
| if (!s->boxShadow()) |
| return; |
| |
| RoundedRect border = (shadowStyle == Inset) ? s->getRoundedInnerBorderFor(paintRect, includeLogicalLeftEdge, includeLogicalRightEdge) |
| : s->getRoundedBorderFor(paintRect, includeLogicalLeftEdge, includeLogicalRightEdge); |
| |
| bool hasBorderRadius = s->hasBorderRadius(); |
| bool hasOpaqueBackground = s->colorIncludingFallback(CSSPropertyBackgroundColor).alpha() == 255; |
| |
| GraphicsContextStateSaver stateSaver(*context, false); |
| |
| const ShadowList* shadowList = s->boxShadow(); |
| for (size_t i = shadowList->shadows().size(); i--; ) { |
| const ShadowData& shadow = shadowList->shadows()[i]; |
| if (shadow.style() != shadowStyle) |
| continue; |
| |
| FloatSize shadowOffset(shadow.x(), shadow.y()); |
| float shadowBlur = shadow.blur(); |
| float shadowSpread = shadow.spread(); |
| |
| if (shadowOffset.isZero() && !shadowBlur && !shadowSpread) |
| continue; |
| |
| const Color& shadowColor = shadow.color(); |
| |
| if (shadow.style() == Normal) { |
| FloatRect fillRect = border.rect(); |
| fillRect.inflate(shadowSpread); |
| if (fillRect.isEmpty()) |
| continue; |
| |
| FloatRect shadowRect(border.rect()); |
| shadowRect.inflate(shadowBlur + shadowSpread); |
| shadowRect.move(shadowOffset); |
| |
| // Save the state and clip, if not already done. |
| // The clip does not depend on any shadow-specific properties. |
| if (!stateSaver.saved()) { |
| stateSaver.save(); |
| if (hasBorderRadius) { |
| RoundedRect rectToClipOut = border; |
| |
| // If the box is opaque, it is unnecessary to clip it out. However, doing so saves time |
| // when painting the shadow. On the other hand, it introduces subpixel gaps along the |
| // corners. Those are avoided by insetting the clipping path by one pixel. |
| if (hasOpaqueBackground) |
| rectToClipOut.inflateWithRadii(-1); |
| |
| if (!rectToClipOut.isEmpty()) { |
| context->clipOutRoundedRect(rectToClipOut); |
| } |
| } else { |
| // This IntRect is correct even with fractional shadows, because it is used for the rectangle |
| // of the box itself, which is always pixel-aligned. |
| IntRect rectToClipOut = border.rect(); |
| |
| // If the box is opaque, it is unnecessary to clip it out. However, doing so saves time |
| // when painting the shadow. On the other hand, it introduces subpixel gaps along the |
| // edges if they are not pixel-aligned. Those are avoided by insetting the clipping path |
| // by one pixel. |
| if (hasOpaqueBackground) { |
| // FIXME: The function to decide on the policy based on the transform should be a named function. |
| // FIXME: It's not clear if this check is right. What about integral scale factors? |
| AffineTransform transform = context->getCTM(); |
| if (transform.a() != 1 || (transform.d() != 1 && transform.d() != -1) || transform.b() || transform.c()) |
| rectToClipOut.inflate(-1); |
| } |
| |
| if (!rectToClipOut.isEmpty()) { |
| context->clipOut(rectToClipOut); |
| } |
| } |
| } |
| |
| // Draw only the shadow. |
| OwnPtr<DrawLooperBuilder> drawLooperBuilder = DrawLooperBuilder::create(); |
| drawLooperBuilder->addShadow(shadowOffset, shadowBlur, shadowColor, |
| DrawLooperBuilder::ShadowRespectsTransforms, DrawLooperBuilder::ShadowIgnoresAlpha); |
| context->setDrawLooper(drawLooperBuilder.release()); |
| |
| if (hasBorderRadius) { |
| RoundedRect influenceRect(pixelSnappedIntRect(LayoutRect(shadowRect)), border.radii()); |
| influenceRect.expandRadii(2 * shadowBlur + shadowSpread); |
| if (allCornersClippedOut(influenceRect, info.rect)) |
| context->fillRect(fillRect, Color::black); |
| else { |
| // TODO: support non-integer shadows - crbug.com/334829 |
| RoundedRect roundedFillRect = border; |
| roundedFillRect.inflate(shadowSpread); |
| |
| roundedFillRect.expandRadii(shadowSpread); |
| if (!roundedFillRect.isRenderable()) |
| roundedFillRect.adjustRadii(); |
| context->fillRoundedRect(roundedFillRect, Color::black); |
| } |
| } else { |
| context->fillRect(fillRect, Color::black); |
| } |
| } else { |
| // The inset shadow case. |
| GraphicsContext::Edges clippedEdges = GraphicsContext::NoEdge; |
| if (!includeLogicalLeftEdge) { |
| clippedEdges |= GraphicsContext::LeftEdge; |
| } |
| if (!includeLogicalRightEdge) { |
| clippedEdges |= GraphicsContext::RightEdge; |
| } |
| // TODO: support non-integer shadows - crbug.com/334828 |
| context->drawInnerShadow(border, shadowColor, flooredIntSize(shadowOffset), shadowBlur, shadowSpread, clippedEdges); |
| } |
| } |
| } |
| |
| LayoutUnit RenderBoxModelObject::containingBlockLogicalWidthForContent() const |
| { |
| return containingBlock()->availableLogicalWidth(); |
| } |
| |
| LayoutRect RenderBoxModelObject::localCaretRectForEmptyElement(LayoutUnit width, LayoutUnit textIndentOffset) |
| { |
| ASSERT(!slowFirstChild()); |
| |
| // FIXME: This does not take into account either :first-line or :first-letter |
| // However, as soon as some content is entered, the line boxes will be |
| // constructed and this kludge is not called any more. So only the caret size |
| // of an empty :first-line'd block is wrong. I think we can live with that. |
| RenderStyle* currentStyle = firstLineStyle(); |
| |
| enum CaretAlignment { alignLeft, alignRight, alignCenter }; |
| |
| CaretAlignment alignment = alignLeft; |
| |
| switch (currentStyle->textAlign()) { |
| case LEFT: |
| break; |
| case CENTER: |
| alignment = alignCenter; |
| break; |
| case RIGHT: |
| alignment = alignRight; |
| break; |
| case JUSTIFY: |
| case TASTART: |
| if (!currentStyle->isLeftToRightDirection()) |
| alignment = alignRight; |
| break; |
| case TAEND: |
| if (currentStyle->isLeftToRightDirection()) |
| alignment = alignRight; |
| break; |
| } |
| |
| LayoutUnit x = borderLeft() + paddingLeft(); |
| LayoutUnit maxX = width - borderRight() - paddingRight(); |
| |
| switch (alignment) { |
| case alignLeft: |
| if (currentStyle->isLeftToRightDirection()) |
| x += textIndentOffset; |
| break; |
| case alignCenter: |
| x = (x + maxX) / 2; |
| if (currentStyle->isLeftToRightDirection()) |
| x += textIndentOffset / 2; |
| else |
| x -= textIndentOffset / 2; |
| break; |
| case alignRight: |
| x = maxX - caretWidth; |
| if (!currentStyle->isLeftToRightDirection()) |
| x -= textIndentOffset; |
| break; |
| } |
| x = std::min(x, std::max<LayoutUnit>(maxX - caretWidth, 0)); |
| |
| LayoutUnit height = style()->fontMetrics().height(); |
| LayoutUnit verticalSpace = lineHeight(true, HorizontalLine, PositionOfInteriorLineBoxes) - height; |
| LayoutUnit y = paddingTop() + borderTop() + (verticalSpace / 2); |
| return LayoutRect(x, y, caretWidth, height); |
| } |
| |
| bool RenderBoxModelObject::shouldAntialiasLines(GraphicsContext* context) |
| { |
| // FIXME: We may want to not antialias when scaled by an integral value, |
| // and we may want to antialias when translated by a non-integral value. |
| // FIXME: See crbug.com/382491. getCTM does not include scale factors applied at raster time, such |
| // as device zoom. |
| return !context->getCTM().isIdentityOrTranslationOrFlipped(); |
| } |
| |
| void RenderBoxModelObject::mapAbsoluteToLocalPoint(MapCoordinatesFlags mode, TransformState& transformState) const |
| { |
| RenderObject* o = container(); |
| if (!o) |
| return; |
| |
| o->mapAbsoluteToLocalPoint(mode, transformState); |
| |
| LayoutSize containerOffset = offsetFromContainer(o, LayoutPoint()); |
| |
| bool preserve3D = mode & UseTransforms && (o->style()->preserves3D() || style()->preserves3D()); |
| if (mode & UseTransforms && shouldUseTransformFromContainer(o)) { |
| TransformationMatrix t; |
| getTransformFromContainer(o, containerOffset, t); |
| transformState.applyTransform(t, preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform); |
| } else |
| transformState.move(containerOffset.width(), containerOffset.height(), preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform); |
| } |
| |
| const RenderObject* RenderBoxModelObject::pushMappingToContainer(const RenderBox* ancestorToStopAt, RenderGeometryMap& geometryMap) const |
| { |
| ASSERT(ancestorToStopAt != this); |
| |
| bool ancestorSkipped; |
| RenderObject* container = this->container(ancestorToStopAt, &ancestorSkipped); |
| if (!container) |
| return 0; |
| |
| bool isInline = isRenderInline(); |
| bool hasTransform = !isInline && isBox() && toRenderBox(this)->transform(); |
| |
| LayoutSize adjustmentForSkippedAncestor; |
| if (ancestorSkipped) { |
| // There can't be a transform between paintInvalidationContainer and o, because transforms create containers, so it should be safe |
| // to just subtract the delta between the ancestor and o. |
| adjustmentForSkippedAncestor = -ancestorToStopAt->offsetFromAncestorContainer(container); |
| } |
| |
| bool offsetDependsOnPoint = false; |
| LayoutSize containerOffset = offsetFromContainer(container, LayoutPoint(), &offsetDependsOnPoint); |
| |
| bool preserve3D = container->style()->preserves3D() || style()->preserves3D(); |
| if (shouldUseTransformFromContainer(container)) { |
| TransformationMatrix t; |
| getTransformFromContainer(container, containerOffset, t); |
| t.translateRight(adjustmentForSkippedAncestor.width().toFloat(), adjustmentForSkippedAncestor.height().toFloat()); |
| geometryMap.push(this, t, preserve3D, offsetDependsOnPoint, hasTransform); |
| } else { |
| containerOffset += adjustmentForSkippedAncestor; |
| geometryMap.push(this, containerOffset, preserve3D, offsetDependsOnPoint, hasTransform); |
| } |
| |
| return ancestorSkipped ? ancestorToStopAt : container; |
| } |
| |
| void RenderBoxModelObject::collectSelfPaintingLayers(Vector<RenderBox*>& layers) |
| { |
| for (RenderObject* child = slowFirstChild(); child; child = child->nextSibling()) { |
| if (child->isBox()) { |
| RenderBox* childBox = toRenderBox(child); |
| if (childBox->hasSelfPaintingLayer()) |
| layers.append(childBox); |
| else |
| childBox->collectSelfPaintingLayers(layers); |
| } else if (child->isBoxModelObject()) { |
| toRenderBoxModelObject(child)->collectSelfPaintingLayers(layers); |
| } |
| } |
| } |
| |
| void RenderBoxModelObject::moveChildTo(RenderBoxModelObject* toBoxModelObject, RenderObject* child, RenderObject* beforeChild, bool fullRemoveInsert) |
| { |
| // We assume that callers have cleared their positioned objects list for child moves (!fullRemoveInsert) so the |
| // positioned renderer maps don't become stale. It would be too slow to do the map lookup on each call. |
| ASSERT(!fullRemoveInsert || !isRenderBlock() || !toRenderBlock(this)->hasPositionedObjects()); |
| |
| ASSERT(this == child->parent()); |
| ASSERT(!beforeChild || toBoxModelObject == beforeChild->parent()); |
| if (fullRemoveInsert && (toBoxModelObject->isRenderBlock() || toBoxModelObject->isRenderInline())) { |
| // Takes care of adding the new child correctly if toBlock and fromBlock |
| // have different kind of children (block vs inline). |
| toBoxModelObject->addChild(virtualChildren()->removeChildNode(this, child), beforeChild); |
| } else |
| toBoxModelObject->virtualChildren()->insertChildNode(toBoxModelObject, virtualChildren()->removeChildNode(this, child, fullRemoveInsert), beforeChild, fullRemoveInsert); |
| } |
| |
| void RenderBoxModelObject::moveAllChildrenTo(RenderBoxModelObject* toBoxModelObject, RenderObject* beforeChild, bool fullRemoveInsert) |
| { |
| // This condition is rarely hit since this function is usually called on |
| // anonymous blocks which can no longer carry positioned objects (see r120761) |
| // or when fullRemoveInsert is false. |
| if (fullRemoveInsert && isRenderBlock()) { |
| RenderBlock* block = toRenderBlock(this); |
| block->removePositionedObjects(0); |
| } |
| |
| ASSERT(!beforeChild || toBoxModelObject == beforeChild->parent()); |
| for (RenderObject* child = slowFirstChild(); child; ) { |
| // Save our next sibling as moveChildTo will clear it. |
| RenderObject* nextSibling = child->nextSibling(); |
| moveChildTo(toBoxModelObject, child, beforeChild, fullRemoveInsert); |
| child = nextSibling; |
| } |
| } |
| |
| } // namespace blink |
