int RenderReplaced::computeReplacedLogicalWidth(bool includeMaxWidth) const
{
int logicalWidth;
if (lengthIsSpecified(style()->width()))
logicalWidth = computeReplacedLogicalWidthUsing(style()->logicalWidth());
else if (m_hasIntrinsicSize)
logicalWidth = calcAspectRatioLogicalWidth();
else
logicalWidth = intrinsicLogicalWidth();
int minLogicalWidth = computeReplacedLogicalWidthUsing(style()->logicalMinWidth());
int maxLogicalWidth = !includeMaxWidth || style()->logicalMaxWidth().isUndefined() ? logicalWidth : computeReplacedLogicalWidthUsing(style()->logicalMaxWidth());
return max(minLogicalWidth, min(logicalWidth, maxLogicalWidth));
}
LayoutUnit RenderReplaced::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const
{
if (style()->logicalWidth().isSpecified() || style()->logicalWidth().isIntrinsic())
return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(style()->logicalWidth()), shouldComputePreferred);
// 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width
double intrinsicRatio = 0;
FloatSize constrainedSize;
computeAspectRatioInformationForRenderBox(constrainedSize, intrinsicRatio);
if (style()->logicalWidth().isAuto()) {
bool computedHeightIsAuto = hasAutoHeightOrContainingBlockWithAutoHeight();
bool hasIntrinsicWidth = constrainedSize.width() > 0;
// If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic width, then that intrinsic width is the used value of 'width'.
if (computedHeightIsAuto && hasIntrinsicWidth)
return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred);
bool hasIntrinsicHeight = constrainedSize.height() > 0;
if (intrinsicRatio) {
// If 'height' and 'width' both have computed values of 'auto' and the element has no intrinsic width, but does have an intrinsic height and intrinsic ratio;
// or if 'width' has a computed value of 'auto', 'height' has some other computed value, and the element does have an intrinsic ratio; then the used value
// of 'width' is: (used height) * (intrinsic ratio)
if (intrinsicRatio && ((computedHeightIsAuto && !hasIntrinsicWidth && hasIntrinsicHeight) || !computedHeightIsAuto)) {
LayoutUnit logicalHeight = computeReplacedLogicalHeight();
return computeReplacedLogicalWidthRespectingMinMaxWidth(roundToInt(round(logicalHeight * intrinsicRatio)), shouldComputePreferred);
}
// If 'height' and 'width' both have computed values of 'auto' and the element has an intrinsic ratio but no intrinsic height or width, then the used value of
// 'width' is undefined in CSS 2.1. However, it is suggested that, if the containing block's width does not itself depend on the replaced element's width, then
// the used value of 'width' is calculated from the constraint equation used for block-level, non-replaced elements in normal flow.
if (computedHeightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight) {
if (shouldComputePreferred == ComputePreferred)
return 0;
// The aforementioned 'constraint equation' used for block-level, non-replaced elements in normal flow:
// 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block
LayoutUnit logicalWidth = containingBlock()->availableLogicalWidth();
// This solves above equation for 'width' (== logicalWidth).
LayoutUnit marginStart = minimumValueForLength(style()->marginStart(), logicalWidth);
LayoutUnit marginEnd = minimumValueForLength(style()->marginEnd(), logicalWidth);
logicalWidth = std::max<LayoutUnit>(0, logicalWidth - (marginStart + marginEnd + (width() - clientWidth())));
return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth, shouldComputePreferred);
}
}
// Otherwise, if 'width' has a computed value of 'auto', and the element has an intrinsic width, then that intrinsic width is the used value of 'width'.
if (hasIntrinsicWidth)
return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred);
// Otherwise, if 'width' has a computed value of 'auto', but none of the conditions above are met, then the used value of 'width' becomes 300px. If 300px is too
// wide to fit the device, UAs should use the width of the largest rectangle that has a 2:1 ratio and fits the device instead.
// Note: We fall through and instead return intrinsicLogicalWidth() here - to preserve existing WebKit behavior, which might or might not be correct, or desired.
// Changing this to return cDefaultWidth, will affect lots of test results. Eg. some tests assume that a blank <img> tag (which implies width/height=auto)
// has no intrinsic size, which is wrong per CSS 2.1, but matches our behavior since a long time.
}
return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), shouldComputePreferred);
}
LayoutUnit RenderReplaced::computeReplacedLogicalWidth(bool includeMaxWidth) const
{
if (style()->logicalWidth().isSpecified())
return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(style()->logicalWidth()), includeMaxWidth);
RenderBox* contentRenderer = embeddedContentBox();
// 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width
bool isPercentageIntrinsicSize = false;
double intrinsicRatio = 0;
FloatSize intrinsicSize;
computeIntrinsicRatioInformationForRenderBox(contentRenderer, intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize);
// FIXME: Remove unnecessary round/roundToInt calls from this method when layout is off ints: webkit.org/b/63656
if (style()->logicalWidth().isAuto()) {
bool heightIsAuto = style()->logicalHeight().isAuto();
bool hasIntrinsicWidth = !isPercentageIntrinsicSize && intrinsicSize.width() > 0;
// If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic width, then that intrinsic width is the used value of 'width'.
if (heightIsAuto && hasIntrinsicWidth)
return computeReplacedLogicalWidthRespectingMinMaxWidth(roundToInt(intrinsicSize.width()), includeMaxWidth);
bool hasIntrinsicHeight = !isPercentageIntrinsicSize && intrinsicSize.height() > 0;
if (intrinsicRatio || isPercentageIntrinsicSize) {
// If 'height' and 'width' both have computed values of 'auto' and the element has no intrinsic width, but does have an intrinsic height and intrinsic ratio;
// or if 'width' has a computed value of 'auto', 'height' has some other computed value, and the element does have an intrinsic ratio; then the used value
// of 'width' is: (used height) * (intrinsic ratio)
if (intrinsicRatio && ((heightIsAuto && !hasIntrinsicWidth && hasIntrinsicHeight) || !heightIsAuto)) {
LayoutUnit logicalHeight = computeReplacedLogicalHeightUsing(style()->logicalHeight());
return computeReplacedLogicalWidthRespectingMinMaxWidth(roundToInt(round(logicalHeight * intrinsicRatio)));
}
// If 'height' and 'width' both have computed values of 'auto' and the element has an intrinsic ratio but no intrinsic height or width, then the used value of
// 'width' is undefined in CSS 2.1. However, it is suggested that, if the containing block's width does not itself depend on the replaced element's width, then
// the used value of 'width' is calculated from the constraint equation used for block-level, non-replaced elements in normal flow.
if (heightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight && contentRenderer) {
// The aforementioned 'constraint equation' used for block-level, non-replaced elements in normal flow:
// 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block
LayoutUnit logicalWidth;
if (RenderBlock* blockWithWidth = firstContainingBlockWithLogicalWidth(this))
logicalWidth = blockWithWidth->computeReplacedLogicalWidthRespectingMinMaxWidth(blockWithWidth->computeReplacedLogicalWidthUsing(blockWithWidth->style()->logicalWidth()), false);
else
logicalWidth = containingBlock()->availableLogicalWidth();
// This solves above equation for 'width' (== logicalWidth).
LayoutUnit marginStart = minimumValueForLength(style()->marginStart(), logicalWidth);
LayoutUnit marginEnd = minimumValueForLength(style()->marginEnd(), logicalWidth);
logicalWidth = max(ZERO_LAYOUT_UNIT, logicalWidth - (marginStart + marginEnd + (width() - clientWidth())));
if (isPercentageIntrinsicSize)
logicalWidth = roundToInt(logicalWidth * intrinsicSize.width() / 100);
return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth, includeMaxWidth);
}
}
// Otherwise, if 'width' has a computed value of 'auto', and the element has an intrinsic width, then that intrinsic width is the used value of 'width'.
if (hasIntrinsicWidth)
return computeReplacedLogicalWidthRespectingMinMaxWidth(roundToInt(intrinsicSize.width()), includeMaxWidth);
// Otherwise, if 'width' has a computed value of 'auto', but none of the conditions above are met, then the used value of 'width' becomes 300px. If 300px is too
// wide to fit the device, UAs should use the width of the largest rectangle that has a 2:1 ratio and fits the device instead.
// Note: We fall through and instead return intrinsicLogicalWidth() here - to preserve existing WebKit behavior, which might or might not be correct, or desired.
// Changing this to return cDefaultWidth, will affect lots of test results. Eg. some tests assume that a blank <img> tag (which implies width/height=auto)
// has no intrinsic size, which is wrong per CSS 2.1, but matches our behavior since a long time.
}
return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), includeMaxWidth);
}
LayoutUnit RenderReplaced::computeReplacedLogicalWidth(bool includeMaxWidth) const
{
if (style()->logicalWidth().isSpecified())
return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(style()->logicalWidth()), includeMaxWidth);
RenderBox* contentRenderer = embeddedContentBox();
// 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width
bool isPercentageIntrinsicSize = false;
double intrinsicRatio = 0;
FloatSize intrinsicSize;
if (contentRenderer)
contentRenderer->computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize);
else
computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize);
if (intrinsicRatio && !isHorizontalWritingMode())
intrinsicRatio = 1 / intrinsicRatio;
if (style()->logicalWidth().isAuto()) {
bool heightIsAuto = style()->logicalHeight().isAuto();
bool hasIntrinsicWidth = m_hasIntrinsicSize || (!isPercentageIntrinsicSize && intrinsicSize.width() > 0);
// If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic width, then that intrinsic width is the used value of 'width'.
if (heightIsAuto && hasIntrinsicWidth) {
if (m_hasIntrinsicSize)
return computeReplacedLogicalWidthRespectingMinMaxWidth(calcAspectRatioLogicalWidth(), includeMaxWidth);
return static_cast<LayoutUnit>(intrinsicSize.width() * style()->effectiveZoom());
}
bool hasIntrinsicHeight = m_hasIntrinsicSize || (!isPercentageIntrinsicSize && intrinsicSize.height() > 0);
if (intrinsicRatio || isPercentageIntrinsicSize) {
// If 'height' and 'width' both have computed values of 'auto' and the element has no intrinsic width, but does have an intrinsic height and intrinsic ratio;
// or if 'width' has a computed value of 'auto', 'height' has some other computed value, and the element does have an intrinsic ratio; then the used value
// of 'width' is: (used height) * (intrinsic ratio)
if (intrinsicRatio && ((heightIsAuto && !hasIntrinsicWidth && hasIntrinsicHeight) || !heightIsAuto)) {
LayoutUnit logicalHeight = computeReplacedLogicalHeightUsing(style()->logicalHeight());
return computeReplacedLogicalWidthRespectingMinMaxWidth(static_cast<LayoutUnit>(ceil(logicalHeight * intrinsicRatio)));
}
// If 'height' and 'width' both have computed values of 'auto' and the element has an intrinsic ratio but no intrinsic height or width, then the used value of
// 'width' is undefined in CSS 2.1. However, it is suggested that, if the containing block's width does not itself depend on the replaced element's width, then
// the used value of 'width' is calculated from the constraint equation used for block-level, non-replaced elements in normal flow.
if (heightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight && contentRenderer) {
// The aforementioned 'constraint equation' used for block-level, non-replaced elements in normal flow:
// 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block
LayoutUnit logicalWidth;
if (RenderBlock* blockWithWidth = firstContainingBlockWithLogicalWidth(this))
logicalWidth = blockWithWidth->computeReplacedLogicalWidthRespectingMinMaxWidth(blockWithWidth->computeReplacedLogicalWidthUsing(blockWithWidth->style()->logicalWidth()), false);
else
logicalWidth = containingBlock()->availableLogicalWidth();
// This solves above equation for 'width' (== logicalWidth).
LayoutUnit marginStart = miminumValueForLength(style()->marginStart(), logicalWidth);
LayoutUnit marginEnd = miminumValueForLength(style()->marginEnd(), logicalWidth);
logicalWidth = max(0, logicalWidth - (marginStart + marginEnd + (width() - clientWidth())));
if (isPercentageIntrinsicSize)
// FIXME: Remove unnecessary rounding when layout is off ints: webkit.org/b/63656
logicalWidth = static_cast<LayoutUnit>(round(logicalWidth * intrinsicSize.width() / 100));
return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth);
}
}
// Otherwise, if 'width' has a computed value of 'auto', and the element has an intrinsic width, then that intrinsic width is the used value of 'width'.
if (hasIntrinsicWidth) {
if (isPercentageIntrinsicSize || m_hasIntrinsicSize)
return computeReplacedLogicalWidthRespectingMinMaxWidth(calcAspectRatioLogicalWidth(), includeMaxWidth);
return static_cast<LayoutUnit>(intrinsicSize.width() * style()->effectiveZoom());
}
// Otherwise, if 'width' has a computed value of 'auto', but none of the conditions above are met, then the used value of 'width' becomes 300px. If 300px is too
// wide to fit the device, UAs should use the width of the largest rectangle that has a 2:1 ratio and fits the device instead.
return computeReplacedLogicalWidthRespectingMinMaxWidth(cDefaultWidth, includeMaxWidth);
}
return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), includeMaxWidth);
}
LayoutUnit LayoutReplaced::computeReplacedLogicalWidth(
ShouldComputePreferred shouldComputePreferred) const {
if (style()->logicalWidth().isSpecified() ||
style()->logicalWidth().isIntrinsic())
return computeReplacedLogicalWidthRespectingMinMaxWidth(
computeReplacedLogicalWidthUsing(MainOrPreferredSize,
style()->logicalWidth()),
shouldComputePreferred);
LayoutReplaced* contentLayoutObject = embeddedReplacedContent();
// 10.3.2 Inline, replaced elements:
// http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width
IntrinsicSizingInfo intrinsicSizingInfo;
computeIntrinsicSizingInfoForReplacedContent(contentLayoutObject,
intrinsicSizingInfo);
FloatSize constrainedSize =
constrainIntrinsicSizeToMinMax(intrinsicSizingInfo);
if (style()->logicalWidth().isAuto()) {
bool computedHeightIsAuto = style()->logicalHeight().isAuto();
// If 'height' and 'width' both have computed values of 'auto' and the
// element also has an intrinsic width, then that intrinsic width is the
// used value of 'width'.
if (computedHeightIsAuto && intrinsicSizingInfo.hasWidth)
return computeReplacedLogicalWidthRespectingMinMaxWidth(
LayoutUnit(constrainedSize.width()), shouldComputePreferred);
if (!intrinsicSizingInfo.aspectRatio.isEmpty()) {
// If 'height' and 'width' both have computed values of 'auto' and the
// element has no intrinsic width, but does have an intrinsic height and
// intrinsic ratio; or if 'width' has a computed value of 'auto', 'height'
// has some other computed value, and the element does have an intrinsic
// ratio; then the used value of 'width' is: (used height) * (intrinsic
// ratio).
if ((computedHeightIsAuto && !intrinsicSizingInfo.hasWidth &&
intrinsicSizingInfo.hasHeight) ||
!computedHeightIsAuto) {
LayoutUnit estimatedUsedWidth =
intrinsicSizingInfo.hasWidth
? LayoutUnit(constrainedSize.width())
: computeConstrainedLogicalWidth(shouldComputePreferred);
LayoutUnit logicalHeight =
computeReplacedLogicalHeight(estimatedUsedWidth);
return computeReplacedLogicalWidthRespectingMinMaxWidth(
resolveWidthForRatio(logicalHeight,
intrinsicSizingInfo.aspectRatio),
shouldComputePreferred);
}
// If 'height' and 'width' both have computed values of 'auto' and the
// element has an intrinsic ratio but no intrinsic height or width, then
// the used value of 'width' is undefined in CSS 2.1. However, it is
// suggested that, if the containing block's width does not itself depend
// on the replaced element's width, then the used value of 'width' is
// calculated from the constraint equation used for block-level,
// non-replaced elements in normal flow.
if (computedHeightIsAuto && !intrinsicSizingInfo.hasWidth &&
!intrinsicSizingInfo.hasHeight)
return computeConstrainedLogicalWidth(shouldComputePreferred);
}
// Otherwise, if 'width' has a computed value of 'auto', and the element has
// an intrinsic width, then that intrinsic width is the used value of
// 'width'.
if (intrinsicSizingInfo.hasWidth)
return computeReplacedLogicalWidthRespectingMinMaxWidth(
LayoutUnit(constrainedSize.width()), shouldComputePreferred);
// Otherwise, if 'width' has a computed value of 'auto', but none of the
// conditions above are met, then the used value of 'width' becomes 300px.
// If 300px is too wide to fit the device, UAs should use the width of the
// largest rectangle that has a 2:1 ratio and fits the device instead.
// Note: We fall through and instead return intrinsicLogicalWidth() here -
// to preserve existing WebKit behavior, which might or might not be
// correct, or desired.
// Changing this to return cDefaultWidth, will affect lots of test results.
// Eg. some tests assume that a blank <img> tag (which implies
// width/height=auto) has no intrinsic size, which is wrong per CSS 2.1, but
// matches our behavior since a long time.
}
return computeReplacedLogicalWidthRespectingMinMaxWidth(
intrinsicLogicalWidth(), shouldComputePreferred);
}