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/*
* Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "config.h"
#include "ShapeOutsideInfo.h"
#include "BoxShape.h"
#include "FloatingObjects.h"
#include "LengthFunctions.h"
#include "RenderBlockFlow.h"
#include "RenderBox.h"
#include "RenderFragmentContainer.h"
#include "RenderImage.h"
namespace WebCore {
LayoutRect ShapeOutsideInfo::computedShapePhysicalBoundingBox() const
{
LayoutRect physicalBoundingBox = computedShape().shapeMarginLogicalBoundingBox();
physicalBoundingBox.setX(physicalBoundingBox.x() + logicalLeftOffset());
physicalBoundingBox.setY(physicalBoundingBox.y() + logicalTopOffset());
if (m_renderer.style().isFlippedBlocksWritingMode())
physicalBoundingBox.setY(m_renderer.logicalHeight() - physicalBoundingBox.maxY());
if (!m_renderer.style().isHorizontalWritingMode())
physicalBoundingBox = physicalBoundingBox.transposedRect();
return physicalBoundingBox;
}
FloatPoint ShapeOutsideInfo::shapeToRendererPoint(const FloatPoint& point) const
{
FloatPoint result = FloatPoint(point.x() + logicalLeftOffset(), point.y() + logicalTopOffset());
if (m_renderer.style().isFlippedBlocksWritingMode())
result.setY(m_renderer.logicalHeight() - result.y());
if (!m_renderer.style().isHorizontalWritingMode())
result = result.transposedPoint();
return result;
}
FloatSize ShapeOutsideInfo::shapeToRendererSize(const FloatSize& size) const
{
if (!m_renderer.style().isHorizontalWritingMode())
return size.transposedSize();
return size;
}
static inline CSSBoxType referenceBox(const ShapeValue& shapeValue)
{
if (shapeValue.cssBox() == BoxMissing) {
if (shapeValue.type() == ShapeValue::Type::Image)
return ContentBox;
return MarginBox;
}
return shapeValue.cssBox();
}
void ShapeOutsideInfo::setReferenceBoxLogicalSize(LayoutSize newReferenceBoxLogicalSize)
{
bool isHorizontalWritingMode = m_renderer.containingBlock()->style().isHorizontalWritingMode();
switch (referenceBox(*m_renderer.style().shapeOutside())) {
case MarginBox:
if (isHorizontalWritingMode)
newReferenceBoxLogicalSize.expand(m_renderer.horizontalMarginExtent(), m_renderer.verticalMarginExtent());
else
newReferenceBoxLogicalSize.expand(m_renderer.verticalMarginExtent(), m_renderer.horizontalMarginExtent());
break;
case BorderBox:
break;
case PaddingBox:
if (isHorizontalWritingMode)
newReferenceBoxLogicalSize.shrink(m_renderer.horizontalBorderExtent(), m_renderer.verticalBorderExtent());
else
newReferenceBoxLogicalSize.shrink(m_renderer.verticalBorderExtent(), m_renderer.horizontalBorderExtent());
break;
case ContentBox:
if (isHorizontalWritingMode)
newReferenceBoxLogicalSize.shrink(m_renderer.horizontalBorderAndPaddingExtent(), m_renderer.verticalBorderAndPaddingExtent());
else
newReferenceBoxLogicalSize.shrink(m_renderer.verticalBorderAndPaddingExtent(), m_renderer.horizontalBorderAndPaddingExtent());
break;
case Fill:
case Stroke:
case ViewBox:
case BoxMissing:
ASSERT_NOT_REACHED();
break;
}
if (m_referenceBoxLogicalSize == newReferenceBoxLogicalSize)
return;
markShapeAsDirty();
m_referenceBoxLogicalSize = newReferenceBoxLogicalSize;
}
static inline bool checkShapeImageOrigin(Document& document, const StyleImage& styleImage)
{
if (styleImage.isGeneratedImage())
return true;
ASSERT(styleImage.cachedImage());
CachedImage& cachedImage = *(styleImage.cachedImage());
if (cachedImage.isOriginClean(&document.securityOrigin()))
return true;
const URL& url = cachedImage.url();
String urlString = url.isNull() ? "''" : url.stringCenterEllipsizedToLength();
document.addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Unsafe attempt to load URL " + urlString + ".");
return false;
}
static LayoutRect getShapeImageMarginRect(const RenderBox& renderBox, const LayoutSize& referenceBoxLogicalSize)
{
LayoutPoint marginBoxOrigin(-renderBox.marginLogicalLeft() - renderBox.borderAndPaddingLogicalLeft(), -renderBox.marginBefore() - renderBox.borderBefore() - renderBox.paddingBefore());
LayoutSize marginBoxSizeDelta(renderBox.marginLogicalWidth() + renderBox.borderAndPaddingLogicalWidth(), renderBox.marginLogicalHeight() + renderBox.borderAndPaddingLogicalHeight());
LayoutSize marginRectSize(referenceBoxLogicalSize + marginBoxSizeDelta);
marginRectSize.clampNegativeToZero();
return LayoutRect(marginBoxOrigin, marginRectSize);
}
std::unique_ptr<Shape> ShapeOutsideInfo::createShapeForImage(StyleImage* styleImage, float shapeImageThreshold, WritingMode writingMode, float margin) const
{
LayoutSize imageSize = m_renderer.calculateImageIntrinsicDimensions(styleImage, m_referenceBoxLogicalSize, RenderImage::ScaleByEffectiveZoom);
styleImage->setContainerContextForRenderer(m_renderer, imageSize, m_renderer.style().effectiveZoom());
const LayoutRect& marginRect = getShapeImageMarginRect(m_renderer, m_referenceBoxLogicalSize);
const LayoutRect& imageRect = is<RenderImage>(m_renderer)
? downcast<RenderImage>(m_renderer).replacedContentRect(m_renderer.intrinsicSize())
: LayoutRect(LayoutPoint(), imageSize);
ASSERT(!styleImage->isPending());
RefPtr<Image> image = styleImage->image(const_cast<RenderBox*>(&m_renderer), imageSize);
return Shape::createRasterShape(image.get(), shapeImageThreshold, imageRect, marginRect, writingMode, margin);
}
const Shape& ShapeOutsideInfo::computedShape() const
{
if (Shape* shape = m_shape.get())
return *shape;
const RenderStyle& style = m_renderer.style();
ASSERT(m_renderer.containingBlock());
const RenderStyle& containingBlockStyle = m_renderer.containingBlock()->style();
WritingMode writingMode = containingBlockStyle.writingMode();
float margin = floatValueForLength(m_renderer.style().shapeMargin(), m_renderer.containingBlock() ? m_renderer.containingBlock()->contentWidth() : LayoutUnit());
float shapeImageThreshold = style.shapeImageThreshold();
const ShapeValue& shapeValue = *style.shapeOutside();
switch (shapeValue.type()) {
case ShapeValue::Type::Shape:
ASSERT(shapeValue.shape());
m_shape = Shape::createShape(*shapeValue.shape(), m_referenceBoxLogicalSize, writingMode, margin);
break;
case ShapeValue::Type::Image:
ASSERT(shapeValue.isImageValid());
m_shape = createShapeForImage(shapeValue.image(), shapeImageThreshold, writingMode, margin);
break;
case ShapeValue::Type::Box: {
RoundedRect shapeRect = computeRoundedRectForBoxShape(referenceBox(shapeValue), m_renderer);
if (!containingBlockStyle.isHorizontalWritingMode())
shapeRect = shapeRect.transposedRect();
m_shape = Shape::createBoxShape(shapeRect, writingMode, margin);
break;
}
}
ASSERT(m_shape);
return *m_shape;
}
static inline LayoutUnit borderBeforeInWritingMode(const RenderBox& renderer, WritingMode writingMode)
{
switch (writingMode) {
case TopToBottomWritingMode: return renderer.borderTop();
case BottomToTopWritingMode: return renderer.borderBottom();
case LeftToRightWritingMode: return renderer.borderLeft();
case RightToLeftWritingMode: return renderer.borderRight();
}
ASSERT_NOT_REACHED();
return renderer.borderBefore();
}
static inline LayoutUnit borderAndPaddingBeforeInWritingMode(const RenderBox& renderer, WritingMode writingMode)
{
switch (writingMode) {
case TopToBottomWritingMode: return renderer.borderTop() + renderer.paddingTop();
case BottomToTopWritingMode: return renderer.borderBottom() + renderer.paddingBottom();
case LeftToRightWritingMode: return renderer.borderLeft() + renderer.paddingLeft();
case RightToLeftWritingMode: return renderer.borderRight() + renderer.paddingRight();
}
ASSERT_NOT_REACHED();
return renderer.borderAndPaddingBefore();
}
LayoutUnit ShapeOutsideInfo::logicalTopOffset() const
{
switch (referenceBox(*m_renderer.style().shapeOutside())) {
case MarginBox: return -m_renderer.marginBefore(&m_renderer.containingBlock()->style());
case BorderBox: return LayoutUnit();
case PaddingBox: return borderBeforeInWritingMode(m_renderer, m_renderer.containingBlock()->style().writingMode());
case ContentBox: return borderAndPaddingBeforeInWritingMode(m_renderer, m_renderer.containingBlock()->style().writingMode());
case Fill: break;
case Stroke: break;
case ViewBox: break;
case BoxMissing: break;
}
ASSERT_NOT_REACHED();
return LayoutUnit();
}
static inline LayoutUnit borderStartWithStyleForWritingMode(const RenderBox& renderer, const RenderStyle& style)
{
if (style.isHorizontalWritingMode()) {
if (style.isLeftToRightDirection())
return renderer.borderLeft();
return renderer.borderRight();
}
if (style.isLeftToRightDirection())
return renderer.borderTop();
return renderer.borderBottom();
}
static inline LayoutUnit borderAndPaddingStartWithStyleForWritingMode(const RenderBox& renderer, const RenderStyle& style)
{
if (style.isHorizontalWritingMode()) {
if (style.isLeftToRightDirection())
return renderer.borderLeft() + renderer.paddingLeft();
return renderer.borderRight() + renderer.paddingRight();
}
if (style.isLeftToRightDirection())
return renderer.borderTop() + renderer.paddingTop();
return renderer.borderBottom() + renderer.paddingBottom();
}
LayoutUnit ShapeOutsideInfo::logicalLeftOffset() const
{
if (m_renderer.isRenderFragmentContainer())
return LayoutUnit();
switch (referenceBox(*m_renderer.style().shapeOutside())) {
case MarginBox: return -m_renderer.marginStart(&m_renderer.containingBlock()->style());
case BorderBox: return LayoutUnit();
case PaddingBox: return borderStartWithStyleForWritingMode(m_renderer, m_renderer.containingBlock()->style());
case ContentBox: return borderAndPaddingStartWithStyleForWritingMode(m_renderer, m_renderer.containingBlock()->style());
case Fill: break;
case Stroke: break;
case ViewBox: break;
case BoxMissing: break;
}
ASSERT_NOT_REACHED();
return LayoutUnit();
}
bool ShapeOutsideInfo::isEnabledFor(const RenderBox& box)
{
ShapeValue* shapeValue = box.style().shapeOutside();
if (!box.isFloating() || !shapeValue)
return false;
switch (shapeValue->type()) {
case ShapeValue::Type::Shape: return shapeValue->shape();
case ShapeValue::Type::Image: return shapeValue->isImageValid() && checkShapeImageOrigin(box.document(), *(shapeValue->image()));
case ShapeValue::Type::Box: return true;
}
ASSERT_NOT_REACHED();
return false;
}
ShapeOutsideDeltas ShapeOutsideInfo::computeDeltasForContainingBlockLine(const RenderBlockFlow& containingBlock, const FloatingObject& floatingObject, LayoutUnit lineTop, LayoutUnit lineHeight)
{
ASSERT(lineHeight >= 0);
LayoutUnit borderBoxTop = containingBlock.logicalTopForFloat(floatingObject) + containingBlock.marginBeforeForChild(m_renderer);
LayoutUnit borderBoxLineTop = lineTop - borderBoxTop;
if (isShapeDirty() || !m_shapeOutsideDeltas.isForLine(borderBoxLineTop, lineHeight)) {
LayoutUnit referenceBoxLineTop = borderBoxLineTop - logicalTopOffset();
LayoutUnit floatMarginBoxWidth = std::max<LayoutUnit>(LayoutUnit(), containingBlock.logicalWidthForFloat(floatingObject));
if (computedShape().lineOverlapsShapeMarginBounds(referenceBoxLineTop, lineHeight)) {
LineSegment segment = computedShape().getExcludedInterval((borderBoxLineTop - logicalTopOffset()), std::min(lineHeight, shapeLogicalBottom() - borderBoxLineTop));
if (segment.isValid) {
LayoutUnit logicalLeftMargin = containingBlock.style().isLeftToRightDirection() ? containingBlock.marginStartForChild(m_renderer) : containingBlock.marginEndForChild(m_renderer);
LayoutUnit rawLeftMarginBoxDelta = segment.logicalLeft + logicalLeftOffset() + logicalLeftMargin;
LayoutUnit leftMarginBoxDelta = clampTo<LayoutUnit>(rawLeftMarginBoxDelta, LayoutUnit(), floatMarginBoxWidth);
LayoutUnit logicalRightMargin = containingBlock.style().isLeftToRightDirection() ? containingBlock.marginEndForChild(m_renderer) : containingBlock.marginStartForChild(m_renderer);
LayoutUnit rawRightMarginBoxDelta = segment.logicalRight + logicalLeftOffset() - containingBlock.logicalWidthForChild(m_renderer) - logicalRightMargin;
LayoutUnit rightMarginBoxDelta = clampTo<LayoutUnit>(rawRightMarginBoxDelta, -floatMarginBoxWidth, LayoutUnit());
m_shapeOutsideDeltas = ShapeOutsideDeltas(leftMarginBoxDelta, rightMarginBoxDelta, true, borderBoxLineTop, lineHeight);
return m_shapeOutsideDeltas;
}
}
// Lines that do not overlap the shape should act as if the float
// wasn't there for layout purposes. So we set the deltas to remove the
// entire width of the float
m_shapeOutsideDeltas = ShapeOutsideDeltas(floatMarginBoxWidth, -floatMarginBoxWidth, false, borderBoxLineTop, lineHeight);
}
return m_shapeOutsideDeltas;
}
}