int RenderReplaced::computeIntrinsicLogicalWidth(RenderBox* contentRenderer, bool includeMaxWidth) const { if (m_hasIntrinsicSize) return computeReplacedLogicalWidthRespectingMinMaxWidth(calcAspectRatioLogicalWidth(), includeMaxWidth); ASSERT(contentRenderer); ASSERT(contentRenderer->style()); return contentRenderer->computeReplacedLogicalWidthRespectingMinMaxWidth(contentRenderer->computeReplacedLogicalWidthUsing(contentRenderer->style()->logicalWidth()), includeMaxWidth); }
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(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); }