--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderBoxModelObject.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,1753 @@
+/*
+ * 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 "config.h"
+#include "RenderBoxModelObject.h"
+
+#include "GraphicsContext.h"
+#include "HTMLFrameOwnerElement.h"
+#include "HTMLNames.h"
+#include "ImageBuffer.h"
+#include "Path.h"
+#include "RenderBlock.h"
+#include "RenderInline.h"
+#include "RenderLayer.h"
+#include "RenderView.h"
+#include <wtf/CurrentTime.h>
+
+using namespace std;
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+bool RenderBoxModelObject::s_wasFloating = false;
+bool RenderBoxModelObject::s_hadLayer = false;
+bool RenderBoxModelObject::s_layerWasSelfPainting = false;
+
+static const double cInterpolationCutoff = 800. * 800.;
+static const double cLowQualityTimeThreshold = 0.500; // 500 ms
+
+typedef HashMap<RenderBoxModelObject*, IntSize> LastPaintSizeMap;
+
+class ImageQualityController : public Noncopyable {
+public:
+ ImageQualityController();
+ bool shouldPaintAtLowQuality(GraphicsContext*, RenderBoxModelObject*, Image*, const IntSize&);
+ void objectDestroyed(RenderBoxModelObject*);
+
+private:
+ void highQualityRepaintTimerFired(Timer<ImageQualityController>*);
+ void restartTimer();
+
+ LastPaintSizeMap m_lastPaintSizeMap;
+ Timer<ImageQualityController> m_timer;
+ bool m_animatedResizeIsActive;
+};
+
+ImageQualityController::ImageQualityController()
+ : m_timer(this, &ImageQualityController::highQualityRepaintTimerFired)
+ , m_animatedResizeIsActive(false)
+{
+}
+
+void ImageQualityController::objectDestroyed(RenderBoxModelObject* object)
+{
+ m_lastPaintSizeMap.remove(object);
+ if (m_lastPaintSizeMap.isEmpty()) {
+ m_animatedResizeIsActive = false;
+ m_timer.stop();
+ }
+}
+
+void ImageQualityController::highQualityRepaintTimerFired(Timer<ImageQualityController>*)
+{
+ if (m_animatedResizeIsActive) {
+ m_animatedResizeIsActive = false;
+ for (LastPaintSizeMap::iterator it = m_lastPaintSizeMap.begin(); it != m_lastPaintSizeMap.end(); ++it)
+ it->first->repaint();
+ }
+}
+
+void ImageQualityController::restartTimer()
+{
+ m_timer.startOneShot(cLowQualityTimeThreshold);
+}
+
+bool ImageQualityController::shouldPaintAtLowQuality(GraphicsContext* context, RenderBoxModelObject* object, Image* image, const IntSize& size)
+{
+ // If the image is not a bitmap image, then none of this is relevant and we just paint at high
+ // quality.
+ if (!image || !image->isBitmapImage() || context->paintingDisabled())
+ return false;
+
+ // Make sure to use the unzoomed image size, since if a full page zoom is in effect, the image
+ // is actually being scaled.
+ IntSize imageSize(image->width(), image->height());
+
+ // Look ourselves up in the hashtable.
+ LastPaintSizeMap::iterator i = m_lastPaintSizeMap.find(object);
+
+ const AffineTransform& currentTransform = context->getCTM();
+ bool contextIsScaled = !currentTransform.isIdentityOrTranslationOrFlipped();
+ if (!contextIsScaled && imageSize == size) {
+ // There is no scale in effect. If we had a scale in effect before, we can just remove this object from the list.
+ if (i != m_lastPaintSizeMap.end())
+ m_lastPaintSizeMap.remove(object);
+
+ return false;
+ }
+
+ // There is no need to hash scaled images that always use low quality mode when the page demands it. This is the iChat case.
+ if (object->document()->page()->inLowQualityImageInterpolationMode()) {
+ double totalPixels = static_cast<double>(image->width()) * static_cast<double>(image->height());
+ if (totalPixels > cInterpolationCutoff)
+ return true;
+ }
+ // If an animated resize is active, paint in low quality and kick the timer ahead.
+ if (m_animatedResizeIsActive) {
+ m_lastPaintSizeMap.set(object, size);
+ restartTimer();
+ return true;
+ }
+ // If this is the first time resizing this image, or its size is the
+ // same as the last resize, draw at high res, but record the paint
+ // size and set the timer.
+ if (i == m_lastPaintSizeMap.end() || size == i->second) {
+ restartTimer();
+ m_lastPaintSizeMap.set(object, size);
+ return false;
+ }
+ // If the timer is no longer active, draw at high quality and don't
+ // set the timer.
+ if (!m_timer.isActive()) {
+ objectDestroyed(object);
+ return false;
+ }
+ // This object has been resized to two different sizes while the timer
+ // is active, so draw at low quality, set the flag for animated resizes and
+ // the object to the list for high quality redraw.
+ m_lastPaintSizeMap.set(object, size);
+ m_animatedResizeIsActive = true;
+ restartTimer();
+ return true;
+}
+
+static ImageQualityController* imageQualityController()
+{
+ static ImageQualityController* controller = new ImageQualityController;
+ return controller;
+}
+
+void RenderBoxModelObject::setSelectionState(SelectionState s)
+{
+ if (selectionState() == s)
+ return;
+
+ if (s == SelectionInside && selectionState() != SelectionNone)
+ return;
+
+ if ((s == SelectionStart && selectionState() == SelectionEnd)
+ || (s == SelectionEnd && selectionState() == SelectionStart))
+ RenderObject::setSelectionState(SelectionBoth);
+ else
+ RenderObject::setSelectionState(s);
+
+ // FIXME:
+ // We should consider whether it is OK propagating to ancestor RenderInlines.
+ // This is a workaround for http://webkit.org/b/32123
+ RenderBlock* cb = containingBlock();
+ if (cb && !cb->isRenderView())
+ cb->setSelectionState(s);
+}
+
+bool RenderBoxModelObject::shouldPaintAtLowQuality(GraphicsContext* context, Image* image, const IntSize& size)
+{
+ return imageQualityController()->shouldPaintAtLowQuality(context, this, image, size);
+}
+
+RenderBoxModelObject::RenderBoxModelObject(Node* node)
+ : RenderObject(node)
+ , m_layer(0)
+{
+}
+
+RenderBoxModelObject::~RenderBoxModelObject()
+{
+ // Our layer should have been destroyed and cleared by now
+ ASSERT(!hasLayer());
+ ASSERT(!m_layer);
+ imageQualityController()->objectDestroyed(this);
+}
+
+void RenderBoxModelObject::destroyLayer()
+{
+ ASSERT(!hasLayer()); // Callers should have already called setHasLayer(false)
+ ASSERT(m_layer);
+ m_layer->destroy(renderArena());
+ m_layer = 0;
+}
+
+void RenderBoxModelObject::destroy()
+{
+ // This must be done before we destroy the RenderObject.
+ if (m_layer)
+ m_layer->clearClipRects();
+
+ // RenderObject::destroy calls back to destroyLayer() for layer destruction
+ RenderObject::destroy();
+}
+
+bool RenderBoxModelObject::hasSelfPaintingLayer() const
+{
+ return m_layer && m_layer->isSelfPaintingLayer();
+}
+
+void RenderBoxModelObject::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)
+{
+ s_wasFloating = isFloating();
+ s_hadLayer = hasLayer();
+ if (s_hadLayer)
+ s_layerWasSelfPainting = layer()->isSelfPaintingLayer();
+
+ // If our z-index changes value or our visibility changes,
+ // we need to dirty our stacking context's z-order list.
+ if (style() && newStyle) {
+ if (parent()) {
+ // Do a repaint with the old style first, e.g., for example if we go from
+ // having an outline to not having an outline.
+ if (diff == StyleDifferenceRepaintLayer) {
+ layer()->repaintIncludingDescendants();
+ if (!(style()->clip() == newStyle->clip()))
+ layer()->clearClipRectsIncludingDescendants();
+ } else if (diff == StyleDifferenceRepaint || newStyle->outlineSize() < style()->outlineSize())
+ repaint();
+ }
+
+ if (diff == StyleDifferenceLayout) {
+ // When a layout hint happens, we go ahead and do a repaint of the layer, since the layer could
+ // end up being destroyed.
+ if (hasLayer()) {
+ if (style()->position() != newStyle->position() ||
+ style()->zIndex() != newStyle->zIndex() ||
+ style()->hasAutoZIndex() != newStyle->hasAutoZIndex() ||
+ !(style()->clip() == newStyle->clip()) ||
+ style()->hasClip() != newStyle->hasClip() ||
+ style()->opacity() != newStyle->opacity() ||
+ style()->transform() != newStyle->transform())
+ layer()->repaintIncludingDescendants();
+ } else if (newStyle->hasTransform() || newStyle->opacity() < 1) {
+ // If we don't have a layer yet, but we are going to get one because of transform or opacity,
+ // then we need to repaint the old position of the object.
+ repaint();
+ }
+ }
+
+ if (hasLayer() && (style()->hasAutoZIndex() != newStyle->hasAutoZIndex() ||
+ style()->zIndex() != newStyle->zIndex() ||
+ style()->visibility() != newStyle->visibility())) {
+ layer()->dirtyStackingContextZOrderLists();
+ if (style()->hasAutoZIndex() != newStyle->hasAutoZIndex() || style()->visibility() != newStyle->visibility())
+ layer()->dirtyZOrderLists();
+ }
+ }
+
+ RenderObject::styleWillChange(diff, newStyle);
+}
+
+void RenderBoxModelObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
+{
+ RenderObject::styleDidChange(diff, oldStyle);
+ updateBoxModelInfoFromStyle();
+
+ if (requiresLayer()) {
+ if (!layer()) {
+ if (s_wasFloating && isFloating())
+ setChildNeedsLayout(true);
+ m_layer = new (renderArena()) RenderLayer(this);
+ setHasLayer(true);
+ m_layer->insertOnlyThisLayer();
+ if (parent() && !needsLayout() && containingBlock())
+ m_layer->updateLayerPositions();
+ }
+ } else if (layer() && layer()->parent()) {
+ setHasTransform(false); // Either a transform wasn't specified or the object doesn't support transforms, so just null out the bit.
+ setHasReflection(false);
+ m_layer->removeOnlyThisLayer(); // calls destroyLayer() which clears m_layer
+ if (s_wasFloating && isFloating())
+ setChildNeedsLayout(true);
+ }
+
+ if (layer()) {
+ layer()->styleChanged(diff, oldStyle);
+ if (s_hadLayer && layer()->isSelfPaintingLayer() != s_layerWasSelfPainting)
+ setChildNeedsLayout(true);
+ }
+}
+
+void RenderBoxModelObject::updateBoxModelInfoFromStyle()
+{
+ // Set the appropriate bits for a box model object. Since all bits are cleared in styleWillChange,
+ // we only check for bits that could possibly be set to true.
+ setHasBoxDecorations(hasBackground() || style()->hasBorder() || style()->hasAppearance() || style()->boxShadow());
+ setInline(style()->isDisplayInlineType());
+ setRelPositioned(style()->position() == RelativePosition);
+}
+
+int RenderBoxModelObject::relativePositionOffsetX() const
+{
+ // 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 containingBlockWidthForContent() here, but instead explicitly
+ // call availableWidth on our containing block.
+ if (!style()->left().isAuto()) {
+ RenderBlock* cb = containingBlock();
+ if (!style()->right().isAuto() && containingBlock()->style()->direction() == RTL)
+ return -style()->right().calcValue(cb->availableWidth());
+ return style()->left().calcValue(cb->availableWidth());
+ }
+ if (!style()->right().isAuto()) {
+ RenderBlock* cb = containingBlock();
+ return -style()->right().calcValue(cb->availableWidth());
+ }
+ return 0;
+}
+
+int RenderBoxModelObject::relativePositionOffsetY() const
+{
+ if (!style()->top().isAuto())
+ return style()->top().calcValue(containingBlock()->availableHeight());
+ else if (!style()->bottom().isAuto())
+ return -style()->bottom().calcValue(containingBlock()->availableHeight());
+
+ return 0;
+}
+
+int RenderBoxModelObject::offsetLeft() const
+{
+ // If the element is the HTML body element or does not have an associated box
+ // return 0 and stop this algorithm.
+ if (isBody())
+ return 0;
+
+ RenderBoxModelObject* offsetPar = offsetParent();
+ int xPos = (isBox() ? toRenderBox(this)->x() : 0);
+
+ // 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.
+ if (offsetPar) {
+ if (offsetPar->isBox() && !offsetPar->isBody())
+ xPos -= toRenderBox(offsetPar)->borderLeft();
+ if (!isPositioned()) {
+ if (isRelPositioned())
+ xPos += relativePositionOffsetX();
+ RenderObject* curr = parent();
+ while (curr && curr != offsetPar) {
+ // FIXME: What are we supposed to do inside SVG content?
+ if (curr->isBox() && !curr->isTableRow())
+ xPos += toRenderBox(curr)->x();
+ curr = curr->parent();
+ }
+ if (offsetPar->isBox() && offsetPar->isBody() && !offsetPar->isRelPositioned() && !offsetPar->isPositioned())
+ xPos += toRenderBox(offsetPar)->x();
+ }
+ }
+
+ return xPos;
+}
+
+int RenderBoxModelObject::offsetTop() const
+{
+ // If the element is the HTML body element or does not have an associated box
+ // return 0 and stop this algorithm.
+ if (isBody())
+ return 0;
+
+ RenderBoxModelObject* offsetPar = offsetParent();
+ int yPos = (isBox() ? toRenderBox(this)->y() : 0);
+
+ // If the offsetParent of the element is null, or is the HTML body element,
+ // return the distance between the canvas origin and the top border edge
+ // of the element and stop this algorithm.
+ if (offsetPar) {
+ if (offsetPar->isBox() && !offsetPar->isBody())
+ yPos -= toRenderBox(offsetPar)->borderTop();
+ if (!isPositioned()) {
+ if (isRelPositioned())
+ yPos += relativePositionOffsetY();
+ RenderObject* curr = parent();
+ while (curr && curr != offsetPar) {
+ // FIXME: What are we supposed to do inside SVG content?
+ if (curr->isBox() && !curr->isTableRow())
+ yPos += toRenderBox(curr)->y();
+ curr = curr->parent();
+ }
+ if (offsetPar->isBox() && offsetPar->isBody() && !offsetPar->isRelPositioned() && !offsetPar->isPositioned())
+ yPos += toRenderBox(offsetPar)->y();
+ }
+ }
+ return yPos;
+}
+
+int RenderBoxModelObject::paddingTop(bool) const
+{
+ int w = 0;
+ Length padding = style()->paddingTop();
+ if (padding.isPercent())
+ w = containingBlock()->availableWidth();
+ return padding.calcMinValue(w);
+}
+
+int RenderBoxModelObject::paddingBottom(bool) const
+{
+ int w = 0;
+ Length padding = style()->paddingBottom();
+ if (padding.isPercent())
+ w = containingBlock()->availableWidth();
+ return padding.calcMinValue(w);
+}
+
+int RenderBoxModelObject::paddingLeft(bool) const
+{
+ int w = 0;
+ Length padding = style()->paddingLeft();
+ if (padding.isPercent())
+ w = containingBlock()->availableWidth();
+ return padding.calcMinValue(w);
+}
+
+int RenderBoxModelObject::paddingRight(bool) const
+{
+ int w = 0;
+ Length padding = style()->paddingRight();
+ if (padding.isPercent())
+ w = containingBlock()->availableWidth();
+ return padding.calcMinValue(w);
+}
+
+void RenderBoxModelObject::paintFillLayerExtended(const PaintInfo& paintInfo, const Color& c, const FillLayer* bgLayer, int tx, int ty, int w, int h, InlineFlowBox* box, CompositeOperator op, RenderObject* backgroundObject)
+{
+ GraphicsContext* context = paintInfo.context;
+ if (context->paintingDisabled())
+ return;
+
+ bool includeLeftEdge = box ? box->includeLeftEdge() : true;
+ bool includeRightEdge = box ? box->includeRightEdge() : true;
+ int bLeft = includeLeftEdge ? borderLeft() : 0;
+ int bRight = includeRightEdge ? borderRight() : 0;
+ int pLeft = includeLeftEdge ? paddingLeft() : 0;
+ int pRight = includeRightEdge ? paddingRight() : 0;
+
+ bool clippedToBorderRadius = false;
+ if (style()->hasBorderRadius() && (includeLeftEdge || includeRightEdge)) {
+ IntRect borderRect(tx, ty, w, h);
+
+ if (borderRect.isEmpty())
+ return;
+
+ context->save();
+
+ IntSize topLeft, topRight, bottomLeft, bottomRight;
+ style()->getBorderRadiiForRect(borderRect, topLeft, topRight, bottomLeft, bottomRight);
+
+ context->addRoundedRectClip(borderRect, includeLeftEdge ? topLeft : IntSize(),
+ includeRightEdge ? topRight : IntSize(),
+ includeLeftEdge ? bottomLeft : IntSize(),
+ includeRightEdge ? bottomRight : IntSize());
+ clippedToBorderRadius = true;
+ }
+
+ bool clippedWithLocalScrolling = hasOverflowClip() && bgLayer->attachment() == LocalBackgroundAttachment;
+ if (clippedWithLocalScrolling) {
+ // Clip to the overflow area.
+ context->save();
+ context->clip(toRenderBox(this)->overflowClipRect(tx, ty));
+
+ // Now adjust our tx, ty, w, h to reflect a scrolled content box with borders at the ends.
+ IntSize offset = layer()->scrolledContentOffset();
+ tx -= offset.width();
+ ty -= offset.height();
+ w = bLeft + layer()->scrollWidth() + bRight;
+ h = borderTop() + layer()->scrollHeight() + borderBottom();
+ }
+
+ if (bgLayer->clip() == PaddingFillBox || bgLayer->clip() == ContentFillBox) {
+ // Clip to the padding or content boxes as necessary.
+ bool includePadding = bgLayer->clip() == ContentFillBox;
+ int x = tx + bLeft + (includePadding ? pLeft : 0);
+ int y = ty + borderTop() + (includePadding ? paddingTop() : 0);
+ int width = w - bLeft - bRight - (includePadding ? pLeft + pRight : 0);
+ int height = h - borderTop() - borderBottom() - (includePadding ? paddingTop() + paddingBottom() : 0);
+ context->save();
+ context->clip(IntRect(x, y, width, height));
+ } else if (bgLayer->clip() == TextFillBox) {
+ // We have to draw our text into a mask that can then be used to clip background drawing.
+ // First figure out how big the mask has to be. It should be no bigger than what we need
+ // to actually render, so we should intersect the dirty rect with the border box of the background.
+ IntRect maskRect(tx, ty, w, h);
+ maskRect.intersect(paintInfo.rect);
+
+ // Now create the mask.
+ OwnPtr<ImageBuffer> maskImage = ImageBuffer::create(maskRect.size());
+ if (!maskImage)
+ return;
+
+ GraphicsContext* maskImageContext = maskImage->context();
+ maskImageContext->translate(-maskRect.x(), -maskRect.y());
+
+ // Now add the text to the clip. We do this by painting using a special paint phase that signals to
+ // InlineTextBoxes that they should just add their contents to the clip.
+ PaintInfo info(maskImageContext, maskRect, PaintPhaseTextClip, true, 0, 0);
+ if (box)
+ box->paint(info, tx - box->x(), ty - box->y());
+ else {
+ int x = isBox() ? toRenderBox(this)->x() : 0;
+ int y = isBox() ? toRenderBox(this)->y() : 0;
+ paint(info, tx - x, ty - y);
+ }
+
+ // The mask has been created. Now we just need to clip to it.
+ context->save();
+ context->clipToImageBuffer(maskRect, maskImage.get());
+ }
+
+ StyleImage* bg = bgLayer->image();
+ bool shouldPaintBackgroundImage = bg && bg->canRender(style()->effectiveZoom());
+ Color bgColor = c;
+
+ // When this style flag is set, change existing background colors and images to a solid white background.
+ // If there's no bg color or image, leave it untouched to avoid affecting transparency.
+ // We don't try to avoid loading the background images, because this style flag is only set
+ // when printing, and at that point we've already loaded the background images anyway. (To avoid
+ // loading the background images we'd have to do this check when applying styles rather than
+ // while rendering.)
+ if (style()->forceBackgroundsToWhite()) {
+ // Note that we can't reuse this variable below because the bgColor might be changed
+ bool shouldPaintBackgroundColor = !bgLayer->next() && bgColor.isValid() && bgColor.alpha() > 0;
+ if (shouldPaintBackgroundImage || shouldPaintBackgroundColor) {
+ bgColor = Color::white;
+ shouldPaintBackgroundImage = false;
+ }
+ }
+
+ bool isRoot = this->isRoot();
+
+ // Only fill with a base color (e.g., white) if we're the root document, since iframes/frames with
+ // no background in the child document should show the parent's background.
+ bool isOpaqueRoot = false;
+ if (isRoot) {
+ isOpaqueRoot = true;
+ if (!bgLayer->next() && !(bgColor.isValid() && bgColor.alpha() == 255) && view()->frameView()) {
+ Element* ownerElement = document()->ownerElement();
+ if (ownerElement) {
+ if (!ownerElement->hasTagName(frameTag)) {
+ // Locate the <body> element using the DOM. This is easier than trying
+ // to crawl around a render tree with potential :before/:after content and
+ // anonymous blocks created by inline <body> tags etc. We can locate the <body>
+ // render object very easily via the DOM.
+ HTMLElement* body = document()->body();
+ if (body) {
+ // Can't scroll a frameset document anyway.
+ isOpaqueRoot = body->hasLocalName(framesetTag);
+ }
+ }
+ } else
+ isOpaqueRoot = !view()->frameView()->isTransparent();
+ }
+ view()->frameView()->setContentIsOpaque(isOpaqueRoot);
+ }
+
+ // Paint the color first underneath all images.
+ if (!bgLayer->next()) {
+ IntRect rect(tx, ty, w, h);
+ rect.intersect(paintInfo.rect);
+ // If we have an alpha and we are painting the root element, go ahead and blend with the base background color.
+ if (isOpaqueRoot) {
+ Color baseColor = view()->frameView()->baseBackgroundColor();
+ if (baseColor.alpha() > 0) {
+ context->save();
+ context->setCompositeOperation(CompositeCopy);
+ context->fillRect(rect, baseColor, style()->colorSpace());
+ context->restore();
+ } else
+ context->clearRect(rect);
+ }
+
+ if (bgColor.isValid() && bgColor.alpha() > 0)
+ context->fillRect(rect, bgColor, style()->colorSpace());
+ }
+
+ // no progressive loading of the background image
+ if (shouldPaintBackgroundImage) {
+ IntRect destRect;
+ IntPoint phase;
+ IntSize tileSize;
+
+ calculateBackgroundImageGeometry(bgLayer, tx, ty, w, h, destRect, phase, tileSize);
+ IntPoint destOrigin = destRect.location();
+ destRect.intersect(paintInfo.rect);
+ if (!destRect.isEmpty()) {
+ phase += destRect.location() - destOrigin;
+ CompositeOperator compositeOp = op == CompositeSourceOver ? bgLayer->composite() : op;
+ RenderObject* clientForBackgroundImage = backgroundObject ? backgroundObject : this;
+ Image* image = bg->image(clientForBackgroundImage, tileSize);
+ bool useLowQualityScaling = shouldPaintAtLowQuality(context, image, tileSize);
+ context->drawTiledImage(image, style()->colorSpace(), destRect, phase, tileSize, compositeOp, useLowQualityScaling);
+ }
+ }
+
+ if (bgLayer->clip() != BorderFillBox)
+ // Undo the background clip
+ context->restore();
+
+ if (clippedToBorderRadius)
+ // Undo the border radius clip
+ context->restore();
+
+ if (clippedWithLocalScrolling) // Undo the clip for local background attachments.
+ context->restore();
+}
+
+IntSize RenderBoxModelObject::calculateFillTileSize(const FillLayer* fillLayer, IntSize positioningAreaSize) const
+{
+ StyleImage* image = fillLayer->image();
+ image->setImageContainerSize(positioningAreaSize); // Use the box established by background-origin.
+
+ EFillSizeType type = fillLayer->size().type;
+
+ switch (type) {
+ case SizeLength: {
+ int w = positioningAreaSize.width();
+ int h = positioningAreaSize.height();
+
+ Length layerWidth = fillLayer->size().size.width();
+ Length layerHeight = fillLayer->size().size.height();
+
+ if (layerWidth.isFixed())
+ w = layerWidth.value();
+ else if (layerWidth.isPercent())
+ w = layerWidth.calcValue(positioningAreaSize.width());
+
+ if (layerHeight.isFixed())
+ h = layerHeight.value();
+ else if (layerHeight.isPercent())
+ h = layerHeight.calcValue(positioningAreaSize.height());
+
+ // If one of the values is auto we have to use the appropriate
+ // scale to maintain our aspect ratio.
+ if (layerWidth.isAuto() && !layerHeight.isAuto()) {
+ IntSize imageIntrinsicSize = image->imageSize(this, style()->effectiveZoom());
+ if (imageIntrinsicSize.height())
+ w = imageIntrinsicSize.width() * h / imageIntrinsicSize.height();
+ } else if (!layerWidth.isAuto() && layerHeight.isAuto()) {
+ IntSize imageIntrinsicSize = image->imageSize(this, style()->effectiveZoom());
+ if (imageIntrinsicSize.width())
+ h = imageIntrinsicSize.height() * w / imageIntrinsicSize.width();
+ } else if (layerWidth.isAuto() && layerHeight.isAuto()) {
+ // If both width and height are auto, use the image's intrinsic size.
+ IntSize imageIntrinsicSize = image->imageSize(this, style()->effectiveZoom());
+ w = imageIntrinsicSize.width();
+ h = imageIntrinsicSize.height();
+ }
+
+ return IntSize(max(1, w), max(1, h));
+ }
+ case Contain:
+ case Cover: {
+ IntSize imageIntrinsicSize = image->imageSize(this, 1);
+ 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 ? min(horizontalScaleFactor, verticalScaleFactor) : max(horizontalScaleFactor, verticalScaleFactor);
+ return IntSize(max<int>(1, imageIntrinsicSize.width() * scaleFactor), max<int>(1, imageIntrinsicSize.height() * scaleFactor));
+ }
+ case SizeNone:
+ break;
+ }
+
+ return image->imageSize(this, style()->effectiveZoom());
+}
+
+void RenderBoxModelObject::calculateBackgroundImageGeometry(const FillLayer* fillLayer, int tx, int ty, int w, int h,
+ IntRect& destRect, IntPoint& phase, IntSize& tileSize)
+{
+ int left = 0;
+ int top = 0;
+ IntSize positioningAreaSize;
+
+ // Determine the background positioning area and set destRect to the background painting area.
+ // destRect will be adjusted later if the background is non-repeating.
+ bool fixedAttachment = fillLayer->attachment() == FixedBackgroundAttachment;
+
+#if ENABLE(FAST_MOBILE_SCROLLING)
+ if (view()->frameView() && view()->frameView()->canBlitOnScroll()) {
+ // As a side effect of an optimization to blit on scroll, we do not honor the CSS
+ // property "background-attachment: fixed" because it may result in rendering
+ // artifacts. Note, these artifacts only appear if we are blitting on scroll of
+ // a page that has fixed background images.
+ fixedAttachment = false;
+ }
+#endif
+
+ if (!fixedAttachment) {
+ destRect = IntRect(tx, ty, w, h);
+
+ int right = 0;
+ int 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();
+ }
+ }
+
+ // The background of the box generated by the root element covers the entire canvas including
+ // its margins. Since those were added in already, we have to factor them out when computing
+ // the background positioning area.
+ if (isRoot()) {
+ positioningAreaSize = IntSize(toRenderBox(this)->width() - left - right, toRenderBox(this)->height() - top - bottom);
+ left += marginLeft();
+ top += marginTop();
+ } else
+ positioningAreaSize = IntSize(w - left - right, h - top - bottom);
+ } else {
+ destRect = viewRect();
+ positioningAreaSize = destRect.size();
+ }
+
+ tileSize = calculateFillTileSize(fillLayer, positioningAreaSize);
+
+ EFillRepeat backgroundRepeatX = fillLayer->repeatX();
+ EFillRepeat backgroundRepeatY = fillLayer->repeatY();
+
+ int xPosition = fillLayer->xPosition().calcMinValue(positioningAreaSize.width() - tileSize.width(), true);
+ if (backgroundRepeatX == RepeatFill)
+ phase.setX(tileSize.width() ? tileSize.width() - (xPosition + left) % tileSize.width() : 0);
+ else {
+ destRect.move(max(xPosition + left, 0), 0);
+ phase.setX(-min(xPosition + left, 0));
+ destRect.setWidth(tileSize.width() + min(xPosition + left, 0));
+ }
+
+ int yPosition = fillLayer->yPosition().calcMinValue(positioningAreaSize.height() - tileSize.height(), true);
+ if (backgroundRepeatY == RepeatFill)
+ phase.setY(tileSize.height() ? tileSize.height() - (yPosition + top) % tileSize.height() : 0);
+ else {
+ destRect.move(0, max(yPosition + top, 0));
+ phase.setY(-min(yPosition + top, 0));
+ destRect.setHeight(tileSize.height() + min(yPosition + top, 0));
+ }
+
+ if (fixedAttachment)
+ phase.move(max(tx - destRect.x(), 0), max(ty - destRect.y(), 0));
+
+ destRect.intersect(IntRect(tx, ty, w, h));
+}
+
+int RenderBoxModelObject::verticalPosition(bool firstLine) const
+{
+ // This method determines the vertical position for inline elements.
+ ASSERT(isInline());
+ if (!isInline())
+ return 0;
+
+ int vpos = 0;
+ EVerticalAlign va = style()->verticalAlign();
+ if (va == TOP)
+ vpos = PositionTop;
+ else if (va == BOTTOM)
+ vpos = PositionBottom;
+ else {
+ bool checkParent = parent()->isRenderInline() && parent()->style()->verticalAlign() != TOP && parent()->style()->verticalAlign() != BOTTOM;
+ vpos = checkParent ? toRenderInline(parent())->verticalPositionFromCache(firstLine) : 0;
+ // don't allow elements nested inside text-top to have a different valignment.
+ if (va == BASELINE)
+ return vpos;
+
+ const Font& f = parent()->style(firstLine)->font();
+ int fontsize = f.pixelSize();
+
+ if (va == SUB)
+ vpos += fontsize / 5 + 1;
+ else if (va == SUPER)
+ vpos -= fontsize / 3 + 1;
+ else if (va == TEXT_TOP)
+ vpos += baselinePosition(firstLine) - f.ascent();
+ else if (va == MIDDLE)
+ vpos += -static_cast<int>(f.xHeight() / 2) - lineHeight(firstLine) / 2 + baselinePosition(firstLine);
+ else if (va == TEXT_BOTTOM) {
+ vpos += f.descent();
+ // lineHeight - baselinePosition is always 0 for replaced elements (except inline blocks), so don't bother wasting time in that case.
+ if (!isReplaced() || style()->display() == INLINE_BLOCK)
+ vpos -= (lineHeight(firstLine) - baselinePosition(firstLine));
+ } else if (va == BASELINE_MIDDLE)
+ vpos += -lineHeight(firstLine) / 2 + baselinePosition(firstLine);
+ else if (va == LENGTH)
+ vpos -= style()->verticalAlignLength().calcValue(lineHeight(firstLine));
+ }
+
+ return vpos;
+}
+
+bool RenderBoxModelObject::paintNinePieceImage(GraphicsContext* graphicsContext, int tx, int ty, int w, int h, const RenderStyle* style,
+ const NinePieceImage& ninePieceImage, CompositeOperator op)
+{
+ StyleImage* styleImage = ninePieceImage.image();
+ if (!styleImage)
+ return false;
+
+ if (!styleImage->isLoaded())
+ return true; // Never paint a nine-piece image incrementally, but don't paint the fallback borders either.
+
+ if (!styleImage->canRender(style->effectiveZoom()))
+ return false;
+
+ // FIXME: border-image is broken with full page zooming when tiling has to happen, since the tiling function
+ // doesn't have any understanding of the zoom that is in effect on the tile.
+ styleImage->setImageContainerSize(IntSize(w, h));
+ IntSize imageSize = styleImage->imageSize(this, 1.0f);
+ int imageWidth = imageSize.width();
+ int imageHeight = imageSize.height();
+
+ int topSlice = min(imageHeight, ninePieceImage.slices().top().calcValue(imageHeight));
+ int bottomSlice = min(imageHeight, ninePieceImage.slices().bottom().calcValue(imageHeight));
+ int leftSlice = min(imageWidth, ninePieceImage.slices().left().calcValue(imageWidth));
+ int rightSlice = min(imageWidth, ninePieceImage.slices().right().calcValue(imageWidth));
+
+ ENinePieceImageRule hRule = ninePieceImage.horizontalRule();
+ ENinePieceImageRule vRule = ninePieceImage.verticalRule();
+
+ bool fitToBorder = style->borderImage() == ninePieceImage;
+
+ int leftWidth = fitToBorder ? style->borderLeftWidth() : leftSlice;
+ int topWidth = fitToBorder ? style->borderTopWidth() : topSlice;
+ int rightWidth = fitToBorder ? style->borderRightWidth() : rightSlice;
+ int bottomWidth = fitToBorder ? style->borderBottomWidth() : bottomSlice;
+
+ bool drawLeft = leftSlice > 0 && leftWidth > 0;
+ bool drawTop = topSlice > 0 && topWidth > 0;
+ bool drawRight = rightSlice > 0 && rightWidth > 0;
+ bool drawBottom = bottomSlice > 0 && bottomWidth > 0;
+ bool drawMiddle = (imageWidth - leftSlice - rightSlice) > 0 && (w - leftWidth - rightWidth) > 0 &&
+ (imageHeight - topSlice - bottomSlice) > 0 && (h - topWidth - bottomWidth) > 0;
+
+ Image* image = styleImage->image(this, imageSize);
+ ColorSpace colorSpace = style->colorSpace();
+
+ if (drawLeft) {
+ // Paint the top and bottom left corners.
+
+ // The top left corner rect is (tx, ty, leftWidth, topWidth)
+ // The rect to use from within the image is obtained from our slice, and is (0, 0, leftSlice, topSlice)
+ if (drawTop)
+ graphicsContext->drawImage(image, colorSpace, IntRect(tx, ty, leftWidth, topWidth),
+ IntRect(0, 0, leftSlice, topSlice), op);
+
+ // The bottom left corner rect is (tx, ty + h - bottomWidth, leftWidth, bottomWidth)
+ // The rect to use from within the image is (0, imageHeight - bottomSlice, leftSlice, botomSlice)
+ if (drawBottom)
+ graphicsContext->drawImage(image, colorSpace, IntRect(tx, ty + h - bottomWidth, leftWidth, bottomWidth),
+ IntRect(0, imageHeight - bottomSlice, leftSlice, bottomSlice), op);
+
+ // Paint the left edge.
+ // Have to scale and tile into the border rect.
+ graphicsContext->drawTiledImage(image, colorSpace, IntRect(tx, ty + topWidth, leftWidth,
+ h - topWidth - bottomWidth),
+ IntRect(0, topSlice, leftSlice, imageHeight - topSlice - bottomSlice),
+ Image::StretchTile, (Image::TileRule)vRule, op);
+ }
+
+ if (drawRight) {
+ // Paint the top and bottom right corners
+ // The top right corner rect is (tx + w - rightWidth, ty, rightWidth, topWidth)
+ // The rect to use from within the image is obtained from our slice, and is (imageWidth - rightSlice, 0, rightSlice, topSlice)
+ if (drawTop)
+ graphicsContext->drawImage(image, colorSpace, IntRect(tx + w - rightWidth, ty, rightWidth, topWidth),
+ IntRect(imageWidth - rightSlice, 0, rightSlice, topSlice), op);
+
+ // The bottom right corner rect is (tx + w - rightWidth, ty + h - bottomWidth, rightWidth, bottomWidth)
+ // The rect to use from within the image is (imageWidth - rightSlice, imageHeight - bottomSlice, rightSlice, bottomSlice)
+ if (drawBottom)
+ graphicsContext->drawImage(image, colorSpace, IntRect(tx + w - rightWidth, ty + h - bottomWidth, rightWidth, bottomWidth),
+ IntRect(imageWidth - rightSlice, imageHeight - bottomSlice, rightSlice, bottomSlice), op);
+
+ // Paint the right edge.
+ graphicsContext->drawTiledImage(image, colorSpace, IntRect(tx + w - rightWidth, ty + topWidth, rightWidth,
+ h - topWidth - bottomWidth),
+ IntRect(imageWidth - rightSlice, topSlice, rightSlice, imageHeight - topSlice - bottomSlice),
+ Image::StretchTile, (Image::TileRule)vRule, op);
+ }
+
+ // Paint the top edge.
+ if (drawTop)
+ graphicsContext->drawTiledImage(image, colorSpace, IntRect(tx + leftWidth, ty, w - leftWidth - rightWidth, topWidth),
+ IntRect(leftSlice, 0, imageWidth - rightSlice - leftSlice, topSlice),
+ (Image::TileRule)hRule, Image::StretchTile, op);
+
+ // Paint the bottom edge.
+ if (drawBottom)
+ graphicsContext->drawTiledImage(image, colorSpace, IntRect(tx + leftWidth, ty + h - bottomWidth,
+ w - leftWidth - rightWidth, bottomWidth),
+ IntRect(leftSlice, imageHeight - bottomSlice, imageWidth - rightSlice - leftSlice, bottomSlice),
+ (Image::TileRule)hRule, Image::StretchTile, op);
+
+ // Paint the middle.
+ if (drawMiddle)
+ graphicsContext->drawTiledImage(image, colorSpace, IntRect(tx + leftWidth, ty + topWidth, w - leftWidth - rightWidth,
+ h - topWidth - bottomWidth),
+ IntRect(leftSlice, topSlice, imageWidth - rightSlice - leftSlice, imageHeight - topSlice - bottomSlice),
+ (Image::TileRule)hRule, (Image::TileRule)vRule, op);
+
+ return true;
+}
+
+#if HAVE(PATH_BASED_BORDER_RADIUS_DRAWING)
+static bool borderWillArcInnerEdge(const IntSize& firstRadius, const IntSize& secondRadius, int firstBorderWidth, int secondBorderWidth, int middleBorderWidth)
+{
+ // FIXME: This test is insufficient. We need to take border style into account.
+ return (!firstRadius.width() || firstRadius.width() >= firstBorderWidth)
+ && (!firstRadius.height() || firstRadius.height() >= middleBorderWidth)
+ && (!secondRadius.width() || secondRadius.width() >= secondBorderWidth)
+ && (!secondRadius.height() || secondRadius.height() >= middleBorderWidth);
+}
+
+void RenderBoxModelObject::paintBorder(GraphicsContext* graphicsContext, int tx, int ty, int w, int h,
+ const RenderStyle* style, bool begin, bool end)
+{
+ if (paintNinePieceImage(graphicsContext, tx, ty, w, h, style, style->borderImage()))
+ return;
+
+ if (graphicsContext->paintingDisabled())
+ return;
+
+ const Color& topColor = style->visitedDependentColor(CSSPropertyBorderTopColor);
+ const Color& bottomColor = style->visitedDependentColor(CSSPropertyBorderBottomColor);
+ const Color& leftColor = style->visitedDependentColor(CSSPropertyBorderLeftColor);
+ const Color& rightColor = style->visitedDependentColor(CSSPropertyBorderRightColor);
+
+ bool topTransparent = style->borderTopIsTransparent();
+ bool bottomTransparent = style->borderBottomIsTransparent();
+ bool rightTransparent = style->borderRightIsTransparent();
+ bool leftTransparent = style->borderLeftIsTransparent();
+
+ EBorderStyle topStyle = style->borderTopStyle();
+ EBorderStyle bottomStyle = style->borderBottomStyle();
+ EBorderStyle leftStyle = style->borderLeftStyle();
+ EBorderStyle rightStyle = style->borderRightStyle();
+
+ bool renderTop = topStyle > BHIDDEN && !topTransparent;
+ bool renderLeft = leftStyle > BHIDDEN && begin && !leftTransparent;
+ bool renderRight = rightStyle > BHIDDEN && end && !rightTransparent;
+ bool renderBottom = bottomStyle > BHIDDEN && !bottomTransparent;
+
+ bool renderRadii = false;
+ Path roundedPath;
+ IntSize topLeft, topRight, bottomLeft, bottomRight;
+ IntRect borderRect(tx, ty, w, h);
+
+ if (style->hasBorderRadius()) {
+ IntSize topLeftRadius, topRightRadius, bottomLeftRadius, bottomRightRadius;
+ style->getBorderRadiiForRect(borderRect, topLeftRadius, topRightRadius, bottomLeftRadius, bottomRightRadius);
+
+ IntRect innerBorderRect = borderInnerRect(borderRect, style->borderTopWidth(), style->borderBottomWidth(),
+ style->borderLeftWidth(), style->borderRightWidth());
+
+ IntSize innerTopLeftRadius, innerTopRightRadius, innerBottomLeftRadius, innerBottomRightRadius;
+ style->getInnerBorderRadiiForRectWithBorderWidths(innerBorderRect, style->borderTopWidth(), style->borderBottomWidth(),
+ style->borderLeftWidth(), style->borderRightWidth(), innerTopLeftRadius, innerTopRightRadius,
+ innerBottomLeftRadius, innerBottomRightRadius);
+
+ if (begin) {
+ topLeft = topLeftRadius;
+ bottomLeft = bottomLeftRadius;
+ }
+ if (end) {
+ topRight = topRightRadius;
+ bottomRight = bottomRightRadius;
+ }
+
+ renderRadii = true;
+
+ // Clip to the inner and outer radii rects.
+ graphicsContext->save();
+ graphicsContext->addRoundedRectClip(borderRect, topLeft, topRight, bottomLeft, bottomRight);
+ graphicsContext->clipOutRoundedRect(innerBorderRect, innerTopLeftRadius, innerTopRightRadius, innerBottomLeftRadius, innerBottomRightRadius);
+
+ roundedPath = Path::createRoundedRectangle(borderRect, topLeft, topRight, bottomLeft, bottomRight);
+ graphicsContext->addPath(roundedPath);
+ }
+
+ bool upperLeftBorderStylesMatch = renderLeft && (topStyle == leftStyle) && (topColor == leftColor);
+ bool upperRightBorderStylesMatch = renderRight && (topStyle == rightStyle) && (topColor == rightColor) && (topStyle != OUTSET) && (topStyle != RIDGE) && (topStyle != INSET) && (topStyle != GROOVE);
+ bool lowerLeftBorderStylesMatch = renderLeft && (bottomStyle == leftStyle) && (bottomColor == leftColor) && (bottomStyle != OUTSET) && (bottomStyle != RIDGE) && (bottomStyle != INSET) && (bottomStyle != GROOVE);
+ bool lowerRightBorderStylesMatch = renderRight && (bottomStyle == rightStyle) && (bottomColor == rightColor);
+
+ if (renderTop) {
+ int x = tx;
+ int x2 = tx + w;
+
+ if (renderRadii && borderWillArcInnerEdge(topLeft, topRight, style->borderLeftWidth(), style->borderRightWidth(), style->borderTopWidth())) {
+ graphicsContext->save();
+ clipBorderSidePolygon(graphicsContext, borderRect, topLeft, topRight, bottomLeft, bottomRight, BSTop, upperLeftBorderStylesMatch, upperRightBorderStylesMatch, style);
+ float thickness = max(max(style->borderTopWidth(), style->borderLeftWidth()), style->borderRightWidth());
+ drawBoxSideFromPath(graphicsContext, borderRect, roundedPath, style->borderTopWidth(), thickness, BSTop, style, topColor, topStyle);
+ graphicsContext->restore();
+ } else {
+ bool ignoreLeft = (topColor == leftColor && topTransparent == leftTransparent && topStyle >= OUTSET
+ && (leftStyle == DOTTED || leftStyle == DASHED || leftStyle == SOLID || leftStyle == OUTSET));
+ bool ignoreRight = (topColor == rightColor && topTransparent == rightTransparent && topStyle >= OUTSET
+ && (rightStyle == DOTTED || rightStyle == DASHED || rightStyle == SOLID || rightStyle == INSET));
+
+ drawLineForBoxSide(graphicsContext, x, ty, x2, ty + style->borderTopWidth(), BSTop, topColor, topStyle,
+ ignoreLeft ? 0 : style->borderLeftWidth(), ignoreRight ? 0 : style->borderRightWidth());
+ }
+ }
+
+ if (renderBottom) {
+ int x = tx;
+ int x2 = tx + w;
+
+ if (renderRadii && borderWillArcInnerEdge(bottomLeft, bottomRight, style->borderLeftWidth(), style->borderRightWidth(), style->borderBottomWidth())) {
+ graphicsContext->save();
+ clipBorderSidePolygon(graphicsContext, borderRect, topLeft, topRight, bottomLeft, bottomRight, BSBottom, lowerLeftBorderStylesMatch, lowerRightBorderStylesMatch, style);
+ float thickness = max(max(style->borderBottomWidth(), style->borderLeftWidth()), style->borderRightWidth());
+ drawBoxSideFromPath(graphicsContext, borderRect, roundedPath, style->borderBottomWidth(), thickness, BSBottom, style, bottomColor, bottomStyle);
+ graphicsContext->restore();
+ } else {
+ bool ignoreLeft = (bottomColor == leftColor && bottomTransparent == leftTransparent && bottomStyle >= OUTSET
+ && (leftStyle == DOTTED || leftStyle == DASHED || leftStyle == SOLID || leftStyle == OUTSET));
+
+ bool ignoreRight = (bottomColor == rightColor && bottomTransparent == rightTransparent && bottomStyle >= OUTSET
+ && (rightStyle == DOTTED || rightStyle == DASHED || rightStyle == SOLID || rightStyle == INSET));
+
+ drawLineForBoxSide(graphicsContext, x, ty + h - style->borderBottomWidth(), x2, ty + h, BSBottom, bottomColor,
+ bottomStyle, ignoreLeft ? 0 : style->borderLeftWidth(),
+ ignoreRight ? 0 : style->borderRightWidth());
+ }
+ }
+
+ if (renderLeft) {
+ int y = ty;
+ int y2 = ty + h;
+
+ if (renderRadii && borderWillArcInnerEdge(bottomLeft, topLeft, style->borderBottomWidth(), style->borderTopWidth(), style->borderLeftWidth())) {
+ graphicsContext->save();
+ clipBorderSidePolygon(graphicsContext, borderRect, topLeft, topRight, bottomLeft, bottomRight, BSLeft, upperLeftBorderStylesMatch, lowerLeftBorderStylesMatch, style);
+ float thickness = max(max(style->borderLeftWidth(), style->borderTopWidth()), style->borderBottomWidth());
+ drawBoxSideFromPath(graphicsContext, borderRect, roundedPath, style->borderLeftWidth(), thickness, BSLeft, style, leftColor, leftStyle);
+ graphicsContext->restore();
+ } else {
+ bool ignoreTop = (topColor == leftColor && topTransparent == leftTransparent && leftStyle >= OUTSET
+ && (topStyle == DOTTED || topStyle == DASHED || topStyle == SOLID || topStyle == OUTSET));
+
+ bool ignoreBottom = (bottomColor == leftColor && bottomTransparent == leftTransparent && leftStyle >= OUTSET
+ && (bottomStyle == DOTTED || bottomStyle == DASHED || bottomStyle == SOLID || bottomStyle == INSET));
+
+ drawLineForBoxSide(graphicsContext, tx, y, tx + style->borderLeftWidth(), y2, BSLeft, leftColor,
+ leftStyle, ignoreTop ? 0 : style->borderTopWidth(), ignoreBottom ? 0 : style->borderBottomWidth());
+ }
+ }
+
+ if (renderRight) {
+ if (renderRadii && borderWillArcInnerEdge(bottomRight, topRight, style->borderBottomWidth(), style->borderTopWidth(), style->borderRightWidth())) {
+ graphicsContext->save();
+ clipBorderSidePolygon(graphicsContext, borderRect, topLeft, topRight, bottomLeft, bottomRight, BSRight, upperRightBorderStylesMatch, lowerRightBorderStylesMatch, style);
+ float thickness = max(max(style->borderRightWidth(), style->borderTopWidth()), style->borderBottomWidth());
+ drawBoxSideFromPath(graphicsContext, borderRect, roundedPath, style->borderRightWidth(), thickness, BSRight, style, rightColor, rightStyle);
+ graphicsContext->restore();
+ } else {
+ bool ignoreTop = ((topColor == rightColor) && (topTransparent == rightTransparent)
+ && (rightStyle >= DOTTED || rightStyle == INSET)
+ && (topStyle == DOTTED || topStyle == DASHED || topStyle == SOLID || topStyle == OUTSET));
+
+ bool ignoreBottom = ((bottomColor == rightColor) && (bottomTransparent == rightTransparent)
+ && (rightStyle >= DOTTED || rightStyle == INSET)
+ && (bottomStyle == DOTTED || bottomStyle == DASHED || bottomStyle == SOLID || bottomStyle == INSET));
+
+ int y = ty;
+ int y2 = ty + h;
+
+ drawLineForBoxSide(graphicsContext, tx + w - style->borderRightWidth(), y, tx + w, y2, BSRight, rightColor,
+ rightStyle, ignoreTop ? 0 : style->borderTopWidth(),
+ ignoreBottom ? 0 : style->borderBottomWidth());
+ }
+ }
+
+ if (renderRadii)
+ graphicsContext->restore();
+}
+#else
+void RenderBoxModelObject::paintBorder(GraphicsContext* graphicsContext, int tx, int ty, int w, int h,
+ const RenderStyle* style, bool begin, bool end)
+{
+ // FIXME: This old version of paintBorder should be removed when all ports implement
+ // GraphicsContext::clipConvexPolygon()!! This should happen soon.
+ if (paintNinePieceImage(graphicsContext, tx, ty, w, h, style, style->borderImage()))
+ return;
+
+ const Color& topColor = style->visitedDependentColor(CSSPropertyBorderTopColor);
+ const Color& bottomColor = style->visitedDependentColor(CSSPropertyBorderBottomColor);
+ const Color& leftColor = style->visitedDependentColor(CSSPropertyBorderLeftColor);
+ const Color& rightColor = style->visitedDependentColor(CSSPropertyBorderRightColor);
+
+ bool topTransparent = style->borderTopIsTransparent();
+ bool bottomTransparent = style->borderBottomIsTransparent();
+ bool rightTransparent = style->borderRightIsTransparent();
+ bool leftTransparent = style->borderLeftIsTransparent();
+
+ EBorderStyle topStyle = style->borderTopStyle();
+ EBorderStyle bottomStyle = style->borderBottomStyle();
+ EBorderStyle leftStyle = style->borderLeftStyle();
+ EBorderStyle rightStyle = style->borderRightStyle();
+
+ bool renderTop = topStyle > BHIDDEN && !topTransparent;
+ bool renderLeft = leftStyle > BHIDDEN && begin && !leftTransparent;
+ bool renderRight = rightStyle > BHIDDEN && end && !rightTransparent;
+ bool renderBottom = bottomStyle > BHIDDEN && !bottomTransparent;
+
+ bool renderRadii = false;
+ IntSize topLeft, topRight, bottomLeft, bottomRight;
+
+ if (style->hasBorderRadius()) {
+ IntRect borderRect = IntRect(tx, ty, w, h);
+
+ IntSize topLeftRadius, topRightRadius, bottomLeftRadius, bottomRightRadius;
+ style->getBorderRadiiForRect(borderRect, topLeftRadius, topRightRadius, bottomLeftRadius, bottomRightRadius);
+
+ if (begin) {
+ topLeft = topLeftRadius;
+ bottomLeft = bottomLeftRadius;
+ }
+ if (end) {
+ topRight = topRightRadius;
+ bottomRight = bottomRightRadius;
+ }
+
+ renderRadii = true;
+
+ // Clip to the rounded rectangle.
+ graphicsContext->save();
+ graphicsContext->addRoundedRectClip(borderRect, topLeft, topRight, bottomLeft, bottomRight);
+ }
+
+ int firstAngleStart, secondAngleStart, firstAngleSpan, secondAngleSpan;
+ float thickness;
+ bool upperLeftBorderStylesMatch = renderLeft && (topStyle == leftStyle) && (topColor == leftColor);
+ bool upperRightBorderStylesMatch = renderRight && (topStyle == rightStyle) && (topColor == rightColor) && (topStyle != OUTSET) && (topStyle != RIDGE) && (topStyle != INSET) && (topStyle != GROOVE);
+ bool lowerLeftBorderStylesMatch = renderLeft && (bottomStyle == leftStyle) && (bottomColor == leftColor) && (bottomStyle != OUTSET) && (bottomStyle != RIDGE) && (bottomStyle != INSET) && (bottomStyle != GROOVE);
+ bool lowerRightBorderStylesMatch = renderRight && (bottomStyle == rightStyle) && (bottomColor == rightColor);
+
+ if (renderTop) {
+ bool ignore_left = (renderRadii && topLeft.width() > 0) ||
+ (topColor == leftColor && topTransparent == leftTransparent && topStyle >= OUTSET &&
+ (leftStyle == DOTTED || leftStyle == DASHED || leftStyle == SOLID || leftStyle == OUTSET));
+
+ bool ignore_right = (renderRadii && topRight.width() > 0) ||
+ (topColor == rightColor && topTransparent == rightTransparent && topStyle >= OUTSET &&
+ (rightStyle == DOTTED || rightStyle == DASHED || rightStyle == SOLID || rightStyle == INSET));
+
+ int x = tx;
+ int x2 = tx + w;
+ if (renderRadii) {
+ x += topLeft.width();
+ x2 -= topRight.width();
+ }
+
+ drawLineForBoxSide(graphicsContext, x, ty, x2, ty + style->borderTopWidth(), BSTop, topColor, topStyle,
+ ignore_left ? 0 : style->borderLeftWidth(), ignore_right ? 0 : style->borderRightWidth());
+
+ if (renderRadii) {
+ int leftY = ty;
+
+ // We make the arc double thick and let the clip rect take care of clipping the extra off.
+ // We're doing this because it doesn't seem possible to match the curve of the clip exactly
+ // with the arc-drawing function.
+ thickness = style->borderTopWidth() * 2;
+
+ if (topLeft.width()) {
+ int leftX = tx;
+ // The inner clip clips inside the arc. This is especially important for 1px borders.
+ bool applyLeftInnerClip = (style->borderLeftWidth() < topLeft.width())
+ && (style->borderTopWidth() < topLeft.height())
+ && (topStyle != DOUBLE || style->borderTopWidth() > 6);
+ if (applyLeftInnerClip) {
+ graphicsContext->save();
+ graphicsContext->addInnerRoundedRectClip(IntRect(leftX, leftY, topLeft.width() * 2, topLeft.height() * 2),
+ style->borderTopWidth());
+ }
+
+ firstAngleStart = 90;
+ firstAngleSpan = upperLeftBorderStylesMatch ? 90 : 45;
+
+ // Draw upper left arc
+ drawArcForBoxSide(graphicsContext, leftX, leftY, thickness, topLeft, firstAngleStart, firstAngleSpan,
+ BSTop, topColor, topStyle, true);
+ if (applyLeftInnerClip)
+ graphicsContext->restore();
+ }
+
+ if (topRight.width()) {
+ int rightX = tx + w - topRight.width() * 2;
+ bool applyRightInnerClip = (style->borderRightWidth() < topRight.width())
+ && (style->borderTopWidth() < topRight.height())
+ && (topStyle != DOUBLE || style->borderTopWidth() > 6);
+ if (applyRightInnerClip) {
+ graphicsContext->save();
+ graphicsContext->addInnerRoundedRectClip(IntRect(rightX, leftY, topRight.width() * 2, topRight.height() * 2),
+ style->borderTopWidth());
+ }
+
+ if (upperRightBorderStylesMatch) {
+ secondAngleStart = 0;
+ secondAngleSpan = 90;
+ } else {
+ secondAngleStart = 45;
+ secondAngleSpan = 45;
+ }
+
+ // Draw upper right arc
+ drawArcForBoxSide(graphicsContext, rightX, leftY, thickness, topRight, secondAngleStart, secondAngleSpan,
+ BSTop, topColor, topStyle, false);
+ if (applyRightInnerClip)
+ graphicsContext->restore();
+ }
+ }
+ }
+
+ if (renderBottom) {
+ bool ignore_left = (renderRadii && bottomLeft.width() > 0) ||
+ (bottomColor == leftColor && bottomTransparent == leftTransparent && bottomStyle >= OUTSET &&
+ (leftStyle == DOTTED || leftStyle == DASHED || leftStyle == SOLID || leftStyle == OUTSET));
+
+ bool ignore_right = (renderRadii && bottomRight.width() > 0) ||
+ (bottomColor == rightColor && bottomTransparent == rightTransparent && bottomStyle >= OUTSET &&
+ (rightStyle == DOTTED || rightStyle == DASHED || rightStyle == SOLID || rightStyle == INSET));
+
+ int x = tx;
+ int x2 = tx + w;
+ if (renderRadii) {
+ x += bottomLeft.width();
+ x2 -= bottomRight.width();
+ }
+
+ drawLineForBoxSide(graphicsContext, x, ty + h - style->borderBottomWidth(), x2, ty + h, BSBottom, bottomColor, bottomStyle,
+ ignore_left ? 0 : style->borderLeftWidth(), ignore_right ? 0 : style->borderRightWidth());
+
+ if (renderRadii) {
+ thickness = style->borderBottomWidth() * 2;
+
+ if (bottomLeft.width()) {
+ int leftX = tx;
+ int leftY = ty + h - bottomLeft.height() * 2;
+ bool applyLeftInnerClip = (style->borderLeftWidth() < bottomLeft.width())
+ && (style->borderBottomWidth() < bottomLeft.height())
+ && (bottomStyle != DOUBLE || style->borderBottomWidth() > 6);
+ if (applyLeftInnerClip) {
+ graphicsContext->save();
+ graphicsContext->addInnerRoundedRectClip(IntRect(leftX, leftY, bottomLeft.width() * 2, bottomLeft.height() * 2),
+ style->borderBottomWidth());
+ }
+
+ if (lowerLeftBorderStylesMatch) {
+ firstAngleStart = 180;
+ firstAngleSpan = 90;
+ } else {
+ firstAngleStart = 225;
+ firstAngleSpan = 45;
+ }
+
+ // Draw lower left arc
+ drawArcForBoxSide(graphicsContext, leftX, leftY, thickness, bottomLeft, firstAngleStart, firstAngleSpan,
+ BSBottom, bottomColor, bottomStyle, true);
+ if (applyLeftInnerClip)
+ graphicsContext->restore();
+ }
+
+ if (bottomRight.width()) {
+ int rightY = ty + h - bottomRight.height() * 2;
+ int rightX = tx + w - bottomRight.width() * 2;
+ bool applyRightInnerClip = (style->borderRightWidth() < bottomRight.width())
+ && (style->borderBottomWidth() < bottomRight.height())
+ && (bottomStyle != DOUBLE || style->borderBottomWidth() > 6);
+ if (applyRightInnerClip) {
+ graphicsContext->save();
+ graphicsContext->addInnerRoundedRectClip(IntRect(rightX, rightY, bottomRight.width() * 2, bottomRight.height() * 2),
+ style->borderBottomWidth());
+ }
+
+ secondAngleStart = 270;
+ secondAngleSpan = lowerRightBorderStylesMatch ? 90 : 45;
+
+ // Draw lower right arc
+ drawArcForBoxSide(graphicsContext, rightX, rightY, thickness, bottomRight, secondAngleStart, secondAngleSpan,
+ BSBottom, bottomColor, bottomStyle, false);
+ if (applyRightInnerClip)
+ graphicsContext->restore();
+ }
+ }
+ }
+
+ if (renderLeft) {
+ bool ignore_top = (renderRadii && topLeft.height() > 0) ||
+ (topColor == leftColor && topTransparent == leftTransparent && leftStyle >= OUTSET &&
+ (topStyle == DOTTED || topStyle == DASHED || topStyle == SOLID || topStyle == OUTSET));
+
+ bool ignore_bottom = (renderRadii && bottomLeft.height() > 0) ||
+ (bottomColor == leftColor && bottomTransparent == leftTransparent && leftStyle >= OUTSET &&
+ (bottomStyle == DOTTED || bottomStyle == DASHED || bottomStyle == SOLID || bottomStyle == INSET));
+
+ int y = ty;
+ int y2 = ty + h;
+ if (renderRadii) {
+ y += topLeft.height();
+ y2 -= bottomLeft.height();
+ }
+
+ drawLineForBoxSide(graphicsContext, tx, y, tx + style->borderLeftWidth(), y2, BSLeft, leftColor, leftStyle,
+ ignore_top ? 0 : style->borderTopWidth(), ignore_bottom ? 0 : style->borderBottomWidth());
+
+ if (renderRadii && (!upperLeftBorderStylesMatch || !lowerLeftBorderStylesMatch)) {
+ int topX = tx;
+ thickness = style->borderLeftWidth() * 2;
+
+ if (!upperLeftBorderStylesMatch && topLeft.width()) {
+ int topY = ty;
+ bool applyTopInnerClip = (style->borderLeftWidth() < topLeft.width())
+ && (style->borderTopWidth() < topLeft.height())
+ && (leftStyle != DOUBLE || style->borderLeftWidth() > 6);
+ if (applyTopInnerClip) {
+ graphicsContext->save();
+ graphicsContext->addInnerRoundedRectClip(IntRect(topX, topY, topLeft.width() * 2, topLeft.height() * 2),
+ style->borderLeftWidth());
+ }
+
+ firstAngleStart = 135;
+ firstAngleSpan = 45;
+
+ // Draw top left arc
+ drawArcForBoxSide(graphicsContext, topX, topY, thickness, topLeft, firstAngleStart, firstAngleSpan,
+ BSLeft, leftColor, leftStyle, true);
+ if (applyTopInnerClip)
+ graphicsContext->restore();
+ }
+
+ if (!lowerLeftBorderStylesMatch && bottomLeft.width()) {
+ int bottomY = ty + h - bottomLeft.height() * 2;
+ bool applyBottomInnerClip = (style->borderLeftWidth() < bottomLeft.width())
+ && (style->borderBottomWidth() < bottomLeft.height())
+ && (leftStyle != DOUBLE || style->borderLeftWidth() > 6);
+ if (applyBottomInnerClip) {
+ graphicsContext->save();
+ graphicsContext->addInnerRoundedRectClip(IntRect(topX, bottomY, bottomLeft.width() * 2, bottomLeft.height() * 2),
+ style->borderLeftWidth());
+ }
+
+ secondAngleStart = 180;
+ secondAngleSpan = 45;
+
+ // Draw bottom left arc
+ drawArcForBoxSide(graphicsContext, topX, bottomY, thickness, bottomLeft, secondAngleStart, secondAngleSpan,
+ BSLeft, leftColor, leftStyle, false);
+ if (applyBottomInnerClip)
+ graphicsContext->restore();
+ }
+ }
+ }
+
+ if (renderRight) {
+ bool ignore_top = (renderRadii && topRight.height() > 0) ||
+ ((topColor == rightColor) && (topTransparent == rightTransparent) &&
+ (rightStyle >= DOTTED || rightStyle == INSET) &&
+ (topStyle == DOTTED || topStyle == DASHED || topStyle == SOLID || topStyle == OUTSET));
+
+ bool ignore_bottom = (renderRadii && bottomRight.height() > 0) ||
+ ((bottomColor == rightColor) && (bottomTransparent == rightTransparent) &&
+ (rightStyle >= DOTTED || rightStyle == INSET) &&
+ (bottomStyle == DOTTED || bottomStyle == DASHED || bottomStyle == SOLID || bottomStyle == INSET));
+
+ int y = ty;
+ int y2 = ty + h;
+ if (renderRadii) {
+ y += topRight.height();
+ y2 -= bottomRight.height();
+ }
+
+ drawLineForBoxSide(graphicsContext, tx + w - style->borderRightWidth(), y, tx + w, y2, BSRight, rightColor, rightStyle,
+ ignore_top ? 0 : style->borderTopWidth(), ignore_bottom ? 0 : style->borderBottomWidth());
+
+ if (renderRadii && (!upperRightBorderStylesMatch || !lowerRightBorderStylesMatch)) {
+ thickness = style->borderRightWidth() * 2;
+
+ if (!upperRightBorderStylesMatch && topRight.width()) {
+ int topX = tx + w - topRight.width() * 2;
+ int topY = ty;
+ bool applyTopInnerClip = (style->borderRightWidth() < topRight.width())
+ && (style->borderTopWidth() < topRight.height())
+ && (rightStyle != DOUBLE || style->borderRightWidth() > 6);
+ if (applyTopInnerClip) {
+ graphicsContext->save();
+ graphicsContext->addInnerRoundedRectClip(IntRect(topX, topY, topRight.width() * 2, topRight.height() * 2),
+ style->borderRightWidth());
+ }
+
+ firstAngleStart = 0;
+ firstAngleSpan = 45;
+
+ // Draw top right arc
+ drawArcForBoxSide(graphicsContext, topX, topY, thickness, topRight, firstAngleStart, firstAngleSpan,
+ BSRight, rightColor, rightStyle, true);
+ if (applyTopInnerClip)
+ graphicsContext->restore();
+ }
+
+ if (!lowerRightBorderStylesMatch && bottomRight.width()) {
+ int bottomX = tx + w - bottomRight.width() * 2;
+ int bottomY = ty + h - bottomRight.height() * 2;
+ bool applyBottomInnerClip = (style->borderRightWidth() < bottomRight.width())
+ && (style->borderBottomWidth() < bottomRight.height())
+ && (rightStyle != DOUBLE || style->borderRightWidth() > 6);
+ if (applyBottomInnerClip) {
+ graphicsContext->save();
+ graphicsContext->addInnerRoundedRectClip(IntRect(bottomX, bottomY, bottomRight.width() * 2, bottomRight.height() * 2),
+ style->borderRightWidth());
+ }
+
+ secondAngleStart = 315;
+ secondAngleSpan = 45;
+
+ // Draw bottom right arc
+ drawArcForBoxSide(graphicsContext, bottomX, bottomY, thickness, bottomRight, secondAngleStart, secondAngleSpan,
+ BSRight, rightColor, rightStyle, false);
+ if (applyBottomInnerClip)
+ graphicsContext->restore();
+ }
+ }
+ }
+
+ if (renderRadii)
+ graphicsContext->restore();
+}
+#endif
+
+void RenderBoxModelObject::clipBorderSidePolygon(GraphicsContext* graphicsContext, const IntRect& box, const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight, const BoxSide side, bool firstEdgeMatches, bool secondEdgeMatches, const RenderStyle* style)
+{
+ FloatPoint quad[4];
+ int tx = box.x();
+ int ty = box.y();
+ int w = box.width();
+ int h = box.height();
+
+ // For each side, create an array of FloatPoints where each point is based on whichever value in each corner
+ // is larger -- the radius width/height or the border width/height -- as appropriate.
+ switch (side) {
+ case BSTop:
+ quad[0] = FloatPoint(tx, ty);
+ quad[1] = FloatPoint(
+ tx + max(topLeft.width(), (int) style->borderLeftWidth()),
+ ty + max(topLeft.height(), (int) style->borderTopWidth()));
+ quad[2] = FloatPoint(
+ tx + w - max(topRight.width(), (int) style->borderRightWidth()),
+ ty + max(topRight.height(), (int)style->borderTopWidth()));
+ quad[3] = FloatPoint(tx + w, ty);
+ break;
+ case BSLeft:
+ quad[0] = FloatPoint(tx, ty);
+ quad[1] = FloatPoint(
+ tx + max(topLeft.width(), (int) style->borderLeftWidth()),
+ ty + max(topLeft.height(), (int) style->borderTopWidth()));
+ quad[2] = FloatPoint(
+ tx + max(bottomLeft.width(), (int) style->borderLeftWidth()),
+ ty + h - max(bottomLeft.height(), (int)style->borderBottomWidth()));
+ quad[3] = FloatPoint(tx, ty + h);
+ break;
+ case BSBottom:
+ quad[0] = FloatPoint(tx, ty + h);
+ quad[1] = FloatPoint(
+ tx + max(bottomLeft.width(), (int) style->borderLeftWidth()),
+ ty + h - max(bottomLeft.height(), (int)style->borderBottomWidth()));
+ quad[2] = FloatPoint(
+ tx + w - max(bottomRight.width(), (int) style->borderRightWidth()),
+ ty + h - max(bottomRight.height(), (int)style->borderBottomWidth()));
+ quad[3] = FloatPoint(tx + w, ty + h);
+ break;
+ case BSRight:
+ quad[0] = FloatPoint(tx + w, ty);
+ quad[1] = FloatPoint(
+ tx + w - max(topRight.width(), (int) style->borderRightWidth()),
+ ty + max(topRight.height(), (int) style->borderTopWidth()));
+ quad[2] = FloatPoint(
+ tx + w - max(bottomRight.width(), (int) style->borderRightWidth()),
+ ty + h - max(bottomRight.height(), (int)style->borderBottomWidth()));
+ quad[3] = FloatPoint(tx + w, ty + h);
+ break;
+ default:
+ 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;
+ }
+
+ FloatPoint firstQuad[4];
+ firstQuad[0] = quad[0];
+ firstQuad[1] = quad[1];
+ firstQuad[2] = side == BSTop || side == BSBottom ? FloatPoint(quad[3].x(), quad[2].y())
+ : firstQuad[2] = FloatPoint(quad[2].x(), quad[3].y());
+ firstQuad[3] = quad[3];
+ graphicsContext->clipConvexPolygon(4, firstQuad, !firstEdgeMatches);
+
+ FloatPoint secondQuad[4];
+ secondQuad[0] = quad[0];
+ secondQuad[1] = side == BSTop || side == BSBottom ? FloatPoint(quad[0].x(), quad[1].y())
+ : FloatPoint(quad[1].x(), quad[0].y());
+ secondQuad[2] = quad[2];
+ secondQuad[3] = quad[3];
+ graphicsContext->clipConvexPolygon(4, secondQuad, !secondEdgeMatches);
+}
+
+void RenderBoxModelObject::paintBoxShadow(GraphicsContext* context, int tx, int ty, int w, int h, const RenderStyle* s, ShadowStyle shadowStyle, bool begin, bool end)
+{
+ // FIXME: Deal with border-image. Would be great to use border-image as a mask.
+
+ if (context->paintingDisabled())
+ return;
+
+ IntRect rect(tx, ty, w, h);
+ IntSize topLeft;
+ IntSize topRight;
+ IntSize bottomLeft;
+ IntSize bottomRight;
+
+ bool hasBorderRadius = s->hasBorderRadius();
+ if (hasBorderRadius && (begin || end)) {
+ IntSize topLeftRadius, topRightRadius, bottomLeftRadius, bottomRightRadius;
+ s->getBorderRadiiForRect(rect, topLeftRadius, topRightRadius, bottomLeftRadius, bottomRightRadius);
+
+ if (begin) {
+ if (shadowStyle == Inset) {
+ topLeftRadius.expand(-borderLeft(), -borderTop());
+ topLeftRadius.clampNegativeToZero();
+ bottomLeftRadius.expand(-borderLeft(), -borderBottom());
+ bottomLeftRadius.clampNegativeToZero();
+ }
+ topLeft = topLeftRadius;
+ bottomLeft = bottomLeftRadius;
+ }
+ if (end) {
+ if (shadowStyle == Inset) {
+ topRightRadius.expand(-borderRight(), -borderTop());
+ topRightRadius.clampNegativeToZero();
+ bottomRightRadius.expand(-borderRight(), -borderBottom());
+ bottomRightRadius.clampNegativeToZero();
+ }
+ topRight = topRightRadius;
+ bottomRight = bottomRightRadius;
+ }
+ }
+
+ if (shadowStyle == Inset) {
+ rect.move(begin ? borderLeft() : 0, borderTop());
+ rect.setWidth(rect.width() - (begin ? borderLeft() : 0) - (end ? borderRight() : 0));
+ rect.setHeight(rect.height() - borderTop() - borderBottom());
+ }
+
+ bool hasOpaqueBackground = s->visitedDependentColor(CSSPropertyBackgroundColor).isValid() && s->visitedDependentColor(CSSPropertyBackgroundColor).alpha() == 255;
+ for (const ShadowData* shadow = s->boxShadow(); shadow; shadow = shadow->next()) {
+ if (shadow->style() != shadowStyle)
+ continue;
+
+ IntSize shadowOffset(shadow->x(), shadow->y());
+ int shadowBlur = shadow->blur();
+ int shadowSpread = shadow->spread();
+ const Color& shadowColor = shadow->color();
+
+ if (shadow->style() == Normal) {
+ IntRect fillRect(rect);
+ fillRect.inflate(shadowSpread);
+ if (fillRect.isEmpty())
+ continue;
+
+ IntRect shadowRect(rect);
+ shadowRect.inflate(shadowBlur + shadowSpread);
+ shadowRect.move(shadowOffset);
+
+ context->save();
+ context->clip(shadowRect);
+
+ // Move the fill just outside the clip, adding 1 pixel separation so that the fill does not
+ // bleed in (due to antialiasing) if the context is transformed.
+ IntSize extraOffset(w + max(0, shadowOffset.width()) + shadowBlur + 2 * shadowSpread + 1, 0);
+ shadowOffset -= extraOffset;
+ fillRect.move(extraOffset);
+
+ context->setShadow(shadowOffset, shadowBlur, shadowColor, s->colorSpace());
+ if (hasBorderRadius) {
+ IntRect rectToClipOut = rect;
+ IntSize topLeftToClipOut = topLeft;
+ IntSize topRightToClipOut = topRight;
+ IntSize bottomLeftToClipOut = bottomLeft;
+ IntSize bottomRightToClipOut = bottomRight;
+
+ if (shadowSpread < 0) {
+ topLeft.expand(shadowSpread, shadowSpread);
+ topLeft.clampNegativeToZero();
+
+ topRight.expand(shadowSpread, shadowSpread);
+ topRight.clampNegativeToZero();
+
+ bottomLeft.expand(shadowSpread, shadowSpread);
+ bottomLeft.clampNegativeToZero();
+
+ bottomRight.expand(shadowSpread, shadowSpread);
+ bottomRight.clampNegativeToZero();
+ }
+
+ // 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.inflate(-1);
+
+ topLeftToClipOut.expand(-1, -1);
+ topLeftToClipOut.clampNegativeToZero();
+
+ topRightToClipOut.expand(-1, -1);
+ topRightToClipOut.clampNegativeToZero();
+
+ bottomLeftToClipOut.expand(-1, -1);
+ bottomLeftToClipOut.clampNegativeToZero();
+
+ bottomRightToClipOut.expand(-1, -1);
+ bottomRightToClipOut.clampNegativeToZero();
+ }
+
+ if (!rectToClipOut.isEmpty())
+ context->clipOutRoundedRect(rectToClipOut, topLeftToClipOut, topRightToClipOut, bottomLeftToClipOut, bottomRightToClipOut);
+ context->fillRoundedRect(fillRect, topLeft, topRight, bottomLeft, bottomRight, Color::black, s->colorSpace());
+ } else {
+ IntRect rectToClipOut = 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) {
+ AffineTransform currentTransformation = context->getCTM();
+ if (currentTransformation.a() != 1 || (currentTransformation.d() != 1 && currentTransformation.d() != -1)
+ || currentTransformation.b() || currentTransformation.c())
+ rectToClipOut.inflate(-1);
+ }
+
+ if (!rectToClipOut.isEmpty())
+ context->clipOut(rectToClipOut);
+ context->fillRect(fillRect, Color::black, s->colorSpace());
+ }
+
+ context->restore();
+ } else {
+ // Inset shadow.
+ IntRect holeRect(rect);
+ holeRect.inflate(-shadowSpread);
+
+ if (holeRect.isEmpty()) {
+ if (hasBorderRadius)
+ context->fillRoundedRect(rect, topLeft, topRight, bottomLeft, bottomRight, shadowColor, s->colorSpace());
+ else
+ context->fillRect(rect, shadowColor, s->colorSpace());
+ continue;
+ }
+ if (!begin) {
+ holeRect.move(-max(shadowOffset.width(), 0) - shadowBlur, 0);
+ holeRect.setWidth(holeRect.width() + max(shadowOffset.width(), 0) + shadowBlur);
+ }
+ if (!end)
+ holeRect.setWidth(holeRect.width() - min(shadowOffset.width(), 0) + shadowBlur);
+
+ Color fillColor(shadowColor.red(), shadowColor.green(), shadowColor.blue(), 255);
+
+ IntRect outerRect(rect);
+ outerRect.inflateX(w - 2 * shadowSpread);
+ outerRect.inflateY(h - 2 * shadowSpread);
+
+ context->save();
+
+ if (hasBorderRadius)
+ context->clip(Path::createRoundedRectangle(rect, topLeft, topRight, bottomLeft, bottomRight));
+ else
+ context->clip(rect);
+
+ IntSize extraOffset(2 * w + max(0, shadowOffset.width()) + shadowBlur - 2 * shadowSpread + 1, 0);
+ context->translate(extraOffset.width(), extraOffset.height());
+ shadowOffset -= extraOffset;
+
+ context->beginPath();
+ context->addPath(Path::createRectangle(outerRect));
+
+ if (hasBorderRadius) {
+ if (shadowSpread > 0) {
+ topLeft.expand(-shadowSpread, -shadowSpread);
+ topLeft.clampNegativeToZero();
+
+ topRight.expand(-shadowSpread, -shadowSpread);
+ topRight.clampNegativeToZero();
+
+ bottomLeft.expand(-shadowSpread, -shadowSpread);
+ bottomLeft.clampNegativeToZero();
+
+ bottomRight.expand(-shadowSpread, -shadowSpread);
+ bottomRight.clampNegativeToZero();
+ }
+ context->addPath(Path::createRoundedRectangle(holeRect, topLeft, topRight, bottomLeft, bottomRight));
+ } else
+ context->addPath(Path::createRectangle(holeRect));
+
+ context->setFillRule(RULE_EVENODD);
+ context->setFillColor(fillColor, s->colorSpace());
+ context->setShadow(shadowOffset, shadowBlur, shadowColor, s->colorSpace());
+ context->fillPath();
+
+ context->restore();
+ }
+ }
+}
+
+int RenderBoxModelObject::containingBlockWidthForContent() const
+{
+ return containingBlock()->availableWidth();
+}
+
+} // namespace WebCore