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);
}
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);
}
LayoutUnit LayoutReplaced::computeReplacedLogicalHeight(
LayoutUnit estimatedUsedWidth) const {
// 10.5 Content height: the 'height' property:
// http://www.w3.org/TR/CSS21/visudet.html#propdef-height
if (hasReplacedLogicalHeight())
return computeReplacedLogicalHeightRespectingMinMaxHeight(
computeReplacedLogicalHeightUsing(MainOrPreferredSize,
style()->logicalHeight()));
LayoutReplaced* contentLayoutObject = embeddedReplacedContent();
// 10.6.2 Inline, replaced elements:
// http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-height
IntrinsicSizingInfo intrinsicSizingInfo;
computeIntrinsicSizingInfoForReplacedContent(contentLayoutObject,
intrinsicSizingInfo);
FloatSize constrainedSize =
constrainIntrinsicSizeToMinMax(intrinsicSizingInfo);
bool widthIsAuto = style()->logicalWidth().isAuto();
// If 'height' and 'width' both have computed values of 'auto' and the element
// also has an intrinsic height, then that intrinsic height is the used value
// of 'height'.
if (widthIsAuto && intrinsicSizingInfo.hasHeight)
return computeReplacedLogicalHeightRespectingMinMaxHeight(
LayoutUnit(constrainedSize.height()));
// Otherwise, if 'height' has a computed value of 'auto', and the element has
// an intrinsic ratio then the used value of 'height' is:
// (used width) / (intrinsic ratio)
if (!intrinsicSizingInfo.aspectRatio.isEmpty()) {
LayoutUnit usedWidth =
estimatedUsedWidth ? estimatedUsedWidth : availableLogicalWidth();
return computeReplacedLogicalHeightRespectingMinMaxHeight(
resolveHeightForRatio(usedWidth, intrinsicSizingInfo.aspectRatio));
}
// Otherwise, if 'height' has a computed value of 'auto', and the element has
// an intrinsic height, then that intrinsic height is the used value of
// 'height'.
if (intrinsicSizingInfo.hasHeight)
return computeReplacedLogicalHeightRespectingMinMaxHeight(
LayoutUnit(constrainedSize.height()));
// Otherwise, if 'height' has a computed value of 'auto', but none of the
// conditions above are met, then the used value of 'height' must be set to
// the height of the largest rectangle that has a 2:1 ratio, has a height not
// greater than 150px, and has a width not greater than the device width.
return computeReplacedLogicalHeightRespectingMinMaxHeight(
intrinsicLogicalHeight());
}
FloatSize LayoutSVGImage::calculateObjectSize() const {
ImageResourceContent* cachedImage = m_imageResource->cachedImage();
if (!cachedImage || cachedImage->errorOccurred())
return m_objectBoundingBox.size();
FloatSize intrinsicSize = FloatSize(cachedImage->getImage()->size());
if (styleRef().width().isAuto() && styleRef().height().isAuto())
return intrinsicSize;
if (styleRef().height().isAuto())
return FloatSize(
m_objectBoundingBox.width(),
resolveHeightForRatio(m_objectBoundingBox.width(), intrinsicSize));
DCHECK(styleRef().width().isAuto());
return FloatSize(
resolveWidthForRatio(m_objectBoundingBox.height(), intrinsicSize),
m_objectBoundingBox.height());
}
