| /* |
| * Copyright (C) 2003, 2006, 2008 Apple 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 "sky/engine/core/rendering/RootInlineBox.h" |
| |
| #include "sky/engine/core/dom/Document.h" |
| #include "sky/engine/core/dom/StyleEngine.h" |
| #include "sky/engine/core/rendering/EllipsisBox.h" |
| #include "sky/engine/core/rendering/HitTestResult.h" |
| #include "sky/engine/core/rendering/InlineTextBox.h" |
| #include "sky/engine/core/rendering/PaintInfo.h" |
| #include "sky/engine/core/rendering/RenderParagraph.h" |
| #include "sky/engine/core/rendering/RenderInline.h" |
| #include "sky/engine/core/rendering/RenderView.h" |
| #include "sky/engine/core/rendering/VerticalPositionCache.h" |
| #include "sky/engine/platform/text/BidiResolver.h" |
| #include "sky/engine/wtf/unicode/Unicode.h" |
| |
| namespace blink { |
| |
| struct SameSizeAsRootInlineBox : public InlineFlowBox { |
| unsigned unsignedVariable; |
| void* pointers[2]; |
| LayoutUnit layoutVariables[5]; |
| }; |
| |
| COMPILE_ASSERT(sizeof(RootInlineBox) == sizeof(SameSizeAsRootInlineBox), RootInlineBox_should_stay_small); |
| |
| typedef WTF::HashMap<const RootInlineBox*, EllipsisBox*> EllipsisBoxMap; |
| static EllipsisBoxMap* gEllipsisBoxMap = 0; |
| |
| RootInlineBox::RootInlineBox(RenderParagraph& block) |
| : InlineFlowBox(block) |
| , m_lineBreakPos(0) |
| , m_lineBreakObj(0) |
| , m_lineTop(0) |
| , m_lineBottom(0) |
| , m_lineTopWithLeading(0) |
| , m_lineBottomWithLeading(0) |
| , m_selectionBottom(0) |
| { |
| } |
| |
| |
| void RootInlineBox::destroy() |
| { |
| detachEllipsisBox(); |
| InlineFlowBox::destroy(); |
| } |
| |
| void RootInlineBox::detachEllipsisBox() |
| { |
| if (hasEllipsisBox()) { |
| EllipsisBox* box = gEllipsisBoxMap->take(this); |
| box->setParent(0); |
| box->destroy(); |
| setHasEllipsisBox(false); |
| } |
| } |
| |
| RenderLineBoxList* RootInlineBox::rendererLineBoxes() const |
| { |
| return block().lineBoxes(); |
| } |
| |
| void RootInlineBox::clearTruncation() |
| { |
| if (hasEllipsisBox()) { |
| detachEllipsisBox(); |
| InlineFlowBox::clearTruncation(); |
| } |
| } |
| |
| int RootInlineBox::baselinePosition(FontBaseline baselineType) const |
| { |
| return boxModelObject()->baselinePosition(baselineType, isFirstLineStyle(), HorizontalLine, PositionOfInteriorLineBoxes); |
| } |
| |
| LayoutUnit RootInlineBox::lineHeight() const |
| { |
| return boxModelObject()->lineHeight(isFirstLineStyle(), HorizontalLine, PositionOfInteriorLineBoxes); |
| } |
| |
| bool RootInlineBox::lineCanAccommodateEllipsis(bool ltr, int blockEdge, int lineBoxEdge, int ellipsisWidth) |
| { |
| // First sanity-check the unoverflowed width of the whole line to see if there is sufficient room. |
| int delta = ltr ? lineBoxEdge - blockEdge : blockEdge - lineBoxEdge; |
| if (logicalWidth() - delta < ellipsisWidth) |
| return false; |
| |
| // Next iterate over all the line boxes on the line. If we find a replaced element that intersects |
| // then we refuse to accommodate the ellipsis. Otherwise we're ok. |
| return InlineFlowBox::canAccommodateEllipsis(ltr, blockEdge, ellipsisWidth); |
| } |
| |
| float RootInlineBox::placeEllipsis(const AtomicString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, |
| InlineBox* markupBox) |
| { |
| // Create an ellipsis box. |
| EllipsisBox* ellipsisBox = new EllipsisBox(renderer(), ellipsisStr, this, |
| ellipsisWidth - (markupBox ? markupBox->logicalWidth() : 0), logicalHeight(), |
| x(), y(), !prevRootBox(), markupBox); |
| |
| if (!gEllipsisBoxMap) |
| gEllipsisBoxMap = new EllipsisBoxMap(); |
| gEllipsisBoxMap->add(this, ellipsisBox); |
| setHasEllipsisBox(true); |
| |
| // FIXME: Do we need an RTL version of this? |
| if (ltr && (logicalLeft() + logicalWidth() + ellipsisWidth) <= blockRightEdge) { |
| ellipsisBox->setLogicalLeft(logicalLeft() + logicalWidth()); |
| return logicalWidth() + ellipsisWidth; |
| } |
| |
| // Now attempt to find the nearest glyph horizontally and place just to the right (or left in RTL) |
| // of that glyph. Mark all of the objects that intersect the ellipsis box as not painting (as being |
| // truncated). |
| bool foundBox = false; |
| float truncatedWidth = 0; |
| float position = placeEllipsisBox(ltr, blockLeftEdge, blockRightEdge, ellipsisWidth, truncatedWidth, foundBox); |
| ellipsisBox->setLogicalLeft(position); |
| return truncatedWidth; |
| } |
| |
| float RootInlineBox::placeEllipsisBox(bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox) |
| { |
| float result = InlineFlowBox::placeEllipsisBox(ltr, blockLeftEdge, blockRightEdge, ellipsisWidth, truncatedWidth, foundBox); |
| if (result == -1) { |
| result = ltr ? blockRightEdge - ellipsisWidth : blockLeftEdge; |
| truncatedWidth = blockRightEdge - blockLeftEdge; |
| } |
| return result; |
| } |
| |
| void RootInlineBox::paintEllipsisBox(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom, Vector<RenderBox*>& layers) const |
| { |
| if (hasEllipsisBox()) |
| ellipsisBox()->paint(paintInfo, paintOffset, lineTop, lineBottom, layers); |
| } |
| |
| void RootInlineBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom, Vector<RenderBox*>& layers) |
| { |
| InlineFlowBox::paint(paintInfo, paintOffset, lineTop, lineBottom, layers); |
| paintEllipsisBox(paintInfo, paintOffset, lineTop, lineBottom, layers); |
| } |
| |
| bool RootInlineBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom) |
| { |
| if (hasEllipsisBox() && visibleToHitTestRequest(request)) { |
| if (ellipsisBox()->nodeAtPoint(request, result, locationInContainer, accumulatedOffset, lineTop, lineBottom)) { |
| renderer().updateHitTestResult(result, locationInContainer.point() - toLayoutSize(accumulatedOffset)); |
| return true; |
| } |
| } |
| return InlineFlowBox::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, lineTop, lineBottom); |
| } |
| |
| void RootInlineBox::adjustPosition(float dx, float dy) |
| { |
| InlineFlowBox::adjustPosition(dx, dy); |
| LayoutUnit blockDirectionDelta = dy; // The block direction delta is a LayoutUnit. |
| m_lineTop += blockDirectionDelta; |
| m_lineBottom += blockDirectionDelta; |
| m_lineTopWithLeading += blockDirectionDelta; |
| m_lineBottomWithLeading += blockDirectionDelta; |
| m_selectionBottom += blockDirectionDelta; |
| if (hasEllipsisBox()) |
| ellipsisBox()->adjustPosition(dx, dy); |
| } |
| |
| void RootInlineBox::childRemoved(InlineBox* box) |
| { |
| if (&box->renderer() == m_lineBreakObj) |
| setLineBreakInfo(0, 0, BidiStatus()); |
| |
| for (RootInlineBox* prev = prevRootBox(); prev && prev->lineBreakObj() == &box->renderer(); prev = prev->prevRootBox()) { |
| prev->setLineBreakInfo(0, 0, BidiStatus()); |
| prev->markDirty(); |
| } |
| } |
| |
| LayoutUnit RootInlineBox::alignBoxesInBlockDirection(LayoutUnit heightOfBlock, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache& verticalPositionCache) |
| { |
| // SVG will handle vertical alignment on its own. |
| if (isSVGRootInlineBox()) |
| return 0; |
| |
| LayoutUnit maxPositionTop = 0; |
| LayoutUnit maxPositionBottom = 0; |
| int maxAscent = 0; |
| int maxDescent = 0; |
| bool setMaxAscent = false; |
| bool setMaxDescent = false; |
| |
| m_baselineType = AlphabeticBaseline; |
| |
| computeLogicalBoxHeights(this, maxPositionTop, maxPositionBottom, maxAscent, maxDescent, setMaxAscent, setMaxDescent, true, |
| textBoxDataMap, baselineType(), verticalPositionCache); |
| |
| if (maxAscent + maxDescent < std::max(maxPositionTop, maxPositionBottom)) |
| adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom); |
| |
| LayoutUnit maxHeight = maxAscent + maxDescent; |
| LayoutUnit lineTop = heightOfBlock; |
| LayoutUnit lineBottom = heightOfBlock; |
| LayoutUnit lineTopIncludingMargins = heightOfBlock; |
| LayoutUnit lineBottomIncludingMargins = heightOfBlock; |
| LayoutUnit selectionBottom = heightOfBlock; |
| bool setLineTop = false; |
| bool hasAnnotationsBefore = false; |
| bool hasAnnotationsAfter = false; |
| placeBoxesInBlockDirection(heightOfBlock, maxHeight, maxAscent, true, lineTop, lineBottom, selectionBottom, setLineTop, |
| lineTopIncludingMargins, lineBottomIncludingMargins, hasAnnotationsBefore, hasAnnotationsAfter, baselineType()); |
| m_hasAnnotationsBefore = hasAnnotationsBefore; |
| m_hasAnnotationsAfter = hasAnnotationsAfter; |
| |
| maxHeight = std::max<LayoutUnit>(0, maxHeight); // FIXME: Is this really necessary? |
| |
| setLineTopBottomPositions(lineTop, lineBottom, heightOfBlock, heightOfBlock + maxHeight, selectionBottom); |
| |
| LayoutUnit annotationsAdjustment = beforeAnnotationsAdjustment(); |
| if (annotationsAdjustment) { |
| // FIXME: Need to handle pagination here. We might have to move to the next page/column as a result of the |
| // ruby expansion. |
| adjustBlockDirectionPosition(annotationsAdjustment.toFloat()); |
| heightOfBlock += annotationsAdjustment; |
| } |
| |
| return heightOfBlock + maxHeight; |
| } |
| |
| float RootInlineBox::maxLogicalTop() const |
| { |
| float maxLogicalTop = 0; |
| computeMaxLogicalTop(maxLogicalTop); |
| return maxLogicalTop; |
| } |
| |
| LayoutUnit RootInlineBox::beforeAnnotationsAdjustment() const |
| { |
| LayoutUnit result = 0; |
| |
| // Annotations under the previous line may push us down. |
| if (prevRootBox() && prevRootBox()->hasAnnotationsAfter()) |
| result = prevRootBox()->computeUnderAnnotationAdjustment(lineTop()); |
| |
| if (!hasAnnotationsBefore()) |
| return result; |
| |
| // Annotations over this line may push us further down. |
| LayoutUnit highestAllowedPosition = prevRootBox() ? std::min(prevRootBox()->lineBottom(), lineTop()) + result : static_cast<LayoutUnit>(block().borderBefore()); |
| result = computeOverAnnotationAdjustment(highestAllowedPosition); |
| |
| return result; |
| } |
| |
| GapRects RootInlineBox::lineSelectionGap(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit selTop, LayoutUnit selHeight, const PaintInfo* paintInfo) |
| { |
| RenderObject::SelectionState lineState = selectionState(); |
| |
| bool leftGap, rightGap; |
| block().getSelectionGapInfo(lineState, leftGap, rightGap); |
| |
| GapRects result; |
| |
| InlineBox* firstBox = firstSelectedBox(); |
| InlineBox* lastBox = lastSelectedBox(); |
| if (leftGap) { |
| result.uniteLeft(block().logicalLeftSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, |
| &firstBox->parent()->renderer(), firstBox->logicalLeft(), selTop, selHeight, paintInfo)); |
| } |
| if (rightGap) { |
| result.uniteRight(block().logicalRightSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, |
| &lastBox->parent()->renderer(), lastBox->logicalRight(), selTop, selHeight, paintInfo)); |
| } |
| |
| // When dealing with bidi text, a non-contiguous selection region is possible. |
| // e.g. The logical text aaaAAAbbb (capitals denote RTL text and non-capitals LTR) is layed out |
| // visually as 3 text runs |aaa|bbb|AAA| if we select 4 characters from the start of the text the |
| // selection will look like (underline denotes selection): |
| // |aaa|bbb|AAA| |
| // ___ _ |
| // We can see that the |bbb| run is not part of the selection while the runs around it are. |
| if (firstBox && firstBox != lastBox) { |
| // Now fill in any gaps on the line that occurred between two selected elements. |
| LayoutUnit lastLogicalLeft = firstBox->logicalRight(); |
| bool isPreviousBoxSelected = firstBox->selectionState() != RenderObject::SelectionNone; |
| for (InlineBox* box = firstBox->nextLeafChild(); box; box = box->nextLeafChild()) { |
| if (box->selectionState() != RenderObject::SelectionNone) { |
| LayoutRect logicalRect(lastLogicalLeft, selTop, box->logicalLeft() - lastLogicalLeft, selHeight); |
| logicalRect.move(offsetFromRootBlock); |
| LayoutRect gapRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, logicalRect); |
| if (isPreviousBoxSelected && gapRect.width() > 0 && gapRect.height() > 0) { |
| if (paintInfo) |
| paintInfo->context->fillRect(gapRect, box->parent()->renderer().selectionBackgroundColor()); |
| // VisibleSelection may be non-contiguous, see comment above. |
| result.uniteCenter(gapRect); |
| } |
| lastLogicalLeft = box->logicalRight(); |
| } |
| if (box == lastBox) |
| break; |
| isPreviousBoxSelected = box->selectionState() != RenderObject::SelectionNone; |
| } |
| } |
| |
| return result; |
| } |
| |
| RenderObject::SelectionState RootInlineBox::selectionState() |
| { |
| // Walk over all of the selected boxes. |
| RenderObject::SelectionState state = RenderObject::SelectionNone; |
| for (InlineBox* box = firstLeafChild(); box; box = box->nextLeafChild()) { |
| RenderObject::SelectionState boxState = box->selectionState(); |
| if ((boxState == RenderObject::SelectionStart && state == RenderObject::SelectionEnd) || |
| (boxState == RenderObject::SelectionEnd && state == RenderObject::SelectionStart)) |
| state = RenderObject::SelectionBoth; |
| else if (state == RenderObject::SelectionNone || |
| ((boxState == RenderObject::SelectionStart || boxState == RenderObject::SelectionEnd) && |
| (state == RenderObject::SelectionNone || state == RenderObject::SelectionInside))) |
| state = boxState; |
| else if (boxState == RenderObject::SelectionNone && state == RenderObject::SelectionStart) { |
| // We are past the end of the selection. |
| state = RenderObject::SelectionBoth; |
| } |
| if (state == RenderObject::SelectionBoth) |
| break; |
| } |
| |
| return state; |
| } |
| |
| InlineBox* RootInlineBox::firstSelectedBox() |
| { |
| for (InlineBox* box = firstLeafChild(); box; box = box->nextLeafChild()) { |
| if (box->selectionState() != RenderObject::SelectionNone) |
| return box; |
| } |
| |
| return 0; |
| } |
| |
| InlineBox* RootInlineBox::lastSelectedBox() |
| { |
| for (InlineBox* box = lastLeafChild(); box; box = box->prevLeafChild()) { |
| if (box->selectionState() != RenderObject::SelectionNone) |
| return box; |
| } |
| |
| return 0; |
| } |
| |
| LayoutUnit RootInlineBox::selectionTop() const |
| { |
| LayoutUnit selectionTop = m_lineTop; |
| |
| if (m_hasAnnotationsBefore) |
| selectionTop -= computeOverAnnotationAdjustment(m_lineTop); |
| |
| if (!prevRootBox()) |
| return selectionTop; |
| |
| return prevRootBox()->selectionBottom(); |
| } |
| |
| LayoutUnit RootInlineBox::selectionTopAdjustedForPrecedingBlock() const |
| { |
| LayoutUnit top = selectionTop(); |
| |
| RenderObject::SelectionState blockSelectionState = root().block().selectionState(); |
| if (blockSelectionState != RenderObject::SelectionInside && blockSelectionState != RenderObject::SelectionEnd) |
| return top; |
| |
| LayoutSize offsetToBlockBefore; |
| if (RenderBlock* block = root().block().blockBeforeWithinSelectionRoot(offsetToBlockBefore)) { |
| if (block->isRenderParagraph()) { |
| if (RootInlineBox* lastLine = toRenderParagraph(block)->lastRootBox()) { |
| RenderObject::SelectionState lastLineSelectionState = lastLine->selectionState(); |
| if (lastLineSelectionState != RenderObject::SelectionInside && lastLineSelectionState != RenderObject::SelectionStart) |
| return top; |
| |
| LayoutUnit lastLineSelectionBottom = lastLine->selectionBottom() + offsetToBlockBefore.height(); |
| top = std::max(top, lastLineSelectionBottom); |
| } |
| } |
| } |
| |
| return top; |
| } |
| |
| LayoutUnit RootInlineBox::selectionBottom() const |
| { |
| LayoutUnit selectionBottom = m_selectionBottom; |
| if (m_hasAnnotationsAfter) |
| selectionBottom += computeUnderAnnotationAdjustment(m_lineBottom); |
| return selectionBottom; |
| } |
| |
| int RootInlineBox::blockDirectionPointInLine() const |
| { |
| return std::max(lineTop(), selectionTop()); |
| } |
| |
| RenderParagraph& RootInlineBox::block() const |
| { |
| return toRenderParagraph(renderer()); |
| } |
| |
| static bool isEditableLeaf(InlineBox* leaf) |
| { |
| return leaf && leaf->renderer().node() && leaf->renderer().node()->hasEditableStyle(); |
| } |
| |
| InlineBox* RootInlineBox::closestLeafChildForPoint(const IntPoint& pointInContents, bool onlyEditableLeaves) |
| { |
| return closestLeafChildForLogicalLeftPosition(pointInContents.x(), onlyEditableLeaves); |
| } |
| |
| InlineBox* RootInlineBox::closestLeafChildForLogicalLeftPosition(int leftPosition, bool onlyEditableLeaves) |
| { |
| InlineBox* firstLeaf = firstLeafChild(); |
| InlineBox* lastLeaf = lastLeafChild(); |
| |
| if (firstLeaf != lastLeaf) { |
| if (firstLeaf->isLineBreak()) |
| firstLeaf = firstLeaf->nextLeafChildIgnoringLineBreak(); |
| else if (lastLeaf->isLineBreak()) |
| lastLeaf = lastLeaf->prevLeafChildIgnoringLineBreak(); |
| } |
| |
| if (firstLeaf == lastLeaf && (!onlyEditableLeaves || isEditableLeaf(firstLeaf))) |
| return firstLeaf; |
| |
| // Avoid returning a list marker when possible. |
| if (leftPosition <= firstLeaf->logicalLeft() && (!onlyEditableLeaves || isEditableLeaf(firstLeaf))) |
| // The leftPosition coordinate is less or equal to left edge of the firstLeaf. |
| // Return it. |
| return firstLeaf; |
| |
| if (leftPosition >= lastLeaf->logicalRight() && (!onlyEditableLeaves || isEditableLeaf(lastLeaf))) |
| // The leftPosition coordinate is greater or equal to right edge of the lastLeaf. |
| // Return it. |
| return lastLeaf; |
| |
| InlineBox* closestLeaf = 0; |
| for (InlineBox* leaf = firstLeaf; leaf; leaf = leaf->nextLeafChildIgnoringLineBreak()) { |
| if (!onlyEditableLeaves || isEditableLeaf(leaf)) { |
| closestLeaf = leaf; |
| if (leftPosition < leaf->logicalRight()) |
| // The x coordinate is less than the right edge of the box. |
| // Return it. |
| return leaf; |
| } |
| } |
| |
| return closestLeaf ? closestLeaf : lastLeaf; |
| } |
| |
| BidiStatus RootInlineBox::lineBreakBidiStatus() const |
| { |
| return BidiStatus(static_cast<WTF::Unicode::Direction>(m_lineBreakBidiStatusEor), static_cast<WTF::Unicode::Direction>(m_lineBreakBidiStatusLastStrong), static_cast<WTF::Unicode::Direction>(m_lineBreakBidiStatusLast), m_lineBreakContext); |
| } |
| |
| void RootInlineBox::setLineBreakInfo(RenderObject* obj, unsigned breakPos, const BidiStatus& status) |
| { |
| // When setting lineBreakObj, the RenderObject must not be a RenderInline |
| // with no line boxes, otherwise all sorts of invariants are broken later. |
| // This has security implications because if the RenderObject does not |
| // point to at least one line box, then that RenderInline can be deleted |
| // later without resetting the lineBreakObj, leading to use-after-free. |
| ASSERT_WITH_SECURITY_IMPLICATION(!obj || obj->isText() || !(obj->isRenderInline() && obj->isBox() && !toRenderBox(obj)->inlineBoxWrapper())); |
| |
| m_lineBreakObj = obj; |
| m_lineBreakPos = breakPos; |
| m_lineBreakBidiStatusEor = status.eor; |
| m_lineBreakBidiStatusLastStrong = status.lastStrong; |
| m_lineBreakBidiStatusLast = status.last; |
| m_lineBreakContext = status.context; |
| } |
| |
| EllipsisBox* RootInlineBox::ellipsisBox() const |
| { |
| if (!hasEllipsisBox()) |
| return 0; |
| return gEllipsisBoxMap->get(this); |
| } |
| |
| void RootInlineBox::removeLineBoxFromRenderObject() |
| { |
| block().lineBoxes()->removeLineBox(this); |
| } |
| |
| void RootInlineBox::extractLineBoxFromRenderObject() |
| { |
| block().lineBoxes()->extractLineBox(this); |
| } |
| |
| void RootInlineBox::attachLineBoxToRenderObject() |
| { |
| block().lineBoxes()->attachLineBox(this); |
| } |
| |
| LayoutRect RootInlineBox::paddedLayoutOverflowRect(LayoutUnit endPadding) const |
| { |
| LayoutRect lineLayoutOverflow = layoutOverflowRect(lineTop(), lineBottom()); |
| if (!endPadding) |
| return lineLayoutOverflow; |
| |
| if (isLeftToRightDirection()) |
| lineLayoutOverflow.shiftMaxXEdgeTo(std::max<LayoutUnit>(lineLayoutOverflow.maxX(), logicalRight() + endPadding)); |
| else |
| lineLayoutOverflow.shiftXEdgeTo(std::min<LayoutUnit>(lineLayoutOverflow.x(), logicalLeft() - endPadding)); |
| |
| return lineLayoutOverflow; |
| } |
| |
| static void setAscentAndDescent(int& ascent, int& descent, int newAscent, int newDescent, bool& ascentDescentSet) |
| { |
| if (!ascentDescentSet) { |
| ascentDescentSet = true; |
| ascent = newAscent; |
| descent = newDescent; |
| } else { |
| ascent = std::max(ascent, newAscent); |
| descent = std::max(descent, newDescent); |
| } |
| } |
| |
| void RootInlineBox::ascentAndDescentForBox(InlineBox* box, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, int& ascent, int& descent, |
| bool& affectsAscent, bool& affectsDescent) const |
| { |
| bool ascentDescentSet = false; |
| |
| // Replaced boxes will return 0 for the line-height if line-box-contain says they are |
| // not to be included. |
| if (box->renderer().isReplaced()) { |
| if (renderer().style(isFirstLineStyle())->lineBoxContain() & LineBoxContainReplaced) { |
| ascent = box->baselinePosition(baselineType()); |
| descent = box->lineHeight() - ascent; |
| |
| // Replaced elements always affect both the ascent and descent. |
| affectsAscent = true; |
| affectsDescent = true; |
| } |
| return; |
| } |
| |
| Vector<const SimpleFontData*>* usedFonts = 0; |
| GlyphOverflow* glyphOverflow = 0; |
| if (box->isText()) { |
| GlyphOverflowAndFallbackFontsMap::iterator it = textBoxDataMap.find(toInlineTextBox(box)); |
| usedFonts = it == textBoxDataMap.end() ? 0 : &it->value.first; |
| glyphOverflow = it == textBoxDataMap.end() ? 0 : &it->value.second; |
| } |
| |
| bool includeLeading = includeLeadingForBox(box); |
| bool includeFont = includeFontForBox(box); |
| |
| bool setUsedFont = false; |
| bool setUsedFontWithLeading = false; |
| |
| if (usedFonts && !usedFonts->isEmpty() && (includeFont || (box->renderer().style(isFirstLineStyle())->lineHeight().isNegative() && includeLeading))) { |
| usedFonts->append(box->renderer().style(isFirstLineStyle())->font().primaryFont()); |
| for (size_t i = 0; i < usedFonts->size(); ++i) { |
| const FontMetrics& fontMetrics = usedFonts->at(i)->fontMetrics(); |
| int usedFontAscent = fontMetrics.ascent(baselineType()); |
| int usedFontDescent = fontMetrics.descent(baselineType()); |
| int halfLeading = (fontMetrics.lineSpacing() - fontMetrics.height()) / 2; |
| int usedFontAscentAndLeading = usedFontAscent + halfLeading; |
| int usedFontDescentAndLeading = fontMetrics.lineSpacing() - usedFontAscentAndLeading; |
| if (includeFont) { |
| setAscentAndDescent(ascent, descent, usedFontAscent, usedFontDescent, ascentDescentSet); |
| setUsedFont = true; |
| } |
| if (includeLeading) { |
| setAscentAndDescent(ascent, descent, usedFontAscentAndLeading, usedFontDescentAndLeading, ascentDescentSet); |
| setUsedFontWithLeading = true; |
| } |
| if (!affectsAscent) |
| affectsAscent = usedFontAscent - box->logicalTop() > 0; |
| if (!affectsDescent) |
| affectsDescent = usedFontDescent + box->logicalTop() > 0; |
| } |
| } |
| |
| // If leading is included for the box, then we compute that box. |
| if (includeLeading && !setUsedFontWithLeading) { |
| int ascentWithLeading = box->baselinePosition(baselineType()); |
| int descentWithLeading = box->lineHeight() - ascentWithLeading; |
| setAscentAndDescent(ascent, descent, ascentWithLeading, descentWithLeading, ascentDescentSet); |
| |
| // Examine the font box for inline flows and text boxes to see if any part of it is above the baseline. |
| // If the top of our font box relative to the root box baseline is above the root box baseline, then |
| // we are contributing to the maxAscent value. Descent is similar. If any part of our font box is below |
| // the root box's baseline, then we contribute to the maxDescent value. |
| affectsAscent = ascentWithLeading - box->logicalTop() > 0; |
| affectsDescent = descentWithLeading + box->logicalTop() > 0; |
| } |
| |
| if (includeFontForBox(box) && !setUsedFont) { |
| int fontAscent = box->renderer().style(isFirstLineStyle())->fontMetrics().ascent(baselineType()); |
| int fontDescent = box->renderer().style(isFirstLineStyle())->fontMetrics().descent(baselineType()); |
| setAscentAndDescent(ascent, descent, fontAscent, fontDescent, ascentDescentSet); |
| affectsAscent = fontAscent - box->logicalTop() > 0; |
| affectsDescent = fontDescent + box->logicalTop() > 0; |
| } |
| |
| if (includeGlyphsForBox(box) && glyphOverflow && glyphOverflow->computeBounds) { |
| setAscentAndDescent(ascent, descent, glyphOverflow->top, glyphOverflow->bottom, ascentDescentSet); |
| affectsAscent = glyphOverflow->top - box->logicalTop() > 0; |
| affectsDescent = glyphOverflow->bottom + box->logicalTop() > 0; |
| glyphOverflow->top = std::min(glyphOverflow->top, std::max(0, glyphOverflow->top - box->renderer().style(isFirstLineStyle())->fontMetrics().ascent(baselineType()))); |
| glyphOverflow->bottom = std::min(glyphOverflow->bottom, std::max(0, glyphOverflow->bottom - box->renderer().style(isFirstLineStyle())->fontMetrics().descent(baselineType()))); |
| } |
| |
| if (includeMarginForBox(box)) { |
| LayoutUnit ascentWithMargin = box->renderer().style(isFirstLineStyle())->fontMetrics().ascent(baselineType()); |
| LayoutUnit descentWithMargin = box->renderer().style(isFirstLineStyle())->fontMetrics().descent(baselineType()); |
| if (box->parent() && !box->renderer().isText()) { |
| ascentWithMargin += box->boxModelObject()->borderBefore() + box->boxModelObject()->paddingBefore() + box->boxModelObject()->marginBefore(); |
| descentWithMargin += box->boxModelObject()->borderAfter() + box->boxModelObject()->paddingAfter() + box->boxModelObject()->marginAfter(); |
| } |
| setAscentAndDescent(ascent, descent, ascentWithMargin, descentWithMargin, ascentDescentSet); |
| |
| // Treat like a replaced element, since we're using the margin box. |
| affectsAscent = true; |
| affectsDescent = true; |
| } |
| } |
| |
| LayoutUnit RootInlineBox::verticalPositionForBox(InlineBox* box, VerticalPositionCache& verticalPositionCache) |
| { |
| if (box->renderer().isText()) |
| return box->parent()->logicalTop(); |
| |
| RenderBoxModelObject* renderer = box->boxModelObject(); |
| ASSERT(renderer->isInline()); |
| if (!renderer->isInline()) |
| return 0; |
| |
| bool firstLine = false; |
| |
| // Check the cache. |
| bool isRenderInline = renderer->isRenderInline(); |
| if (isRenderInline && !firstLine) { |
| LayoutUnit verticalPosition = verticalPositionCache.get(renderer, baselineType()); |
| if (verticalPosition != PositionUndefined) |
| return verticalPosition; |
| } |
| |
| LayoutUnit verticalPosition = 0; |
| EVerticalAlign verticalAlign = renderer->style()->verticalAlign(); |
| if (verticalAlign == TOP || verticalAlign == BOTTOM) |
| return 0; |
| |
| RenderObject* parent = renderer->parent(); |
| if (parent->isRenderInline() && parent->style()->verticalAlign() != TOP && parent->style()->verticalAlign() != BOTTOM) |
| verticalPosition = box->parent()->logicalTop(); |
| |
| if (verticalAlign != BASELINE) { |
| const Font& font = parent->style(firstLine)->font(); |
| const FontMetrics& fontMetrics = font.fontMetrics(); |
| int fontSize = font.fontDescription().computedPixelSize(); |
| |
| LineDirectionMode lineDirection = HorizontalLine; |
| |
| if (verticalAlign == SUB) |
| verticalPosition += fontSize / 5 + 1; |
| else if (verticalAlign == SUPER) |
| verticalPosition -= fontSize / 3 + 1; |
| else if (verticalAlign == TEXT_TOP) |
| verticalPosition += renderer->baselinePosition(baselineType(), firstLine, lineDirection) - fontMetrics.ascent(baselineType()); |
| else if (verticalAlign == MIDDLE) |
| verticalPosition = (verticalPosition - static_cast<LayoutUnit>(fontMetrics.xHeight() / 2) - renderer->lineHeight(firstLine, lineDirection) / 2 + renderer->baselinePosition(baselineType(), firstLine, lineDirection)).round(); |
| else if (verticalAlign == TEXT_BOTTOM) { |
| verticalPosition += fontMetrics.descent(baselineType()); |
| // lineHeight - baselinePosition is always 0 for replaced elements (except inline blocks), so don't bother wasting time in that case. |
| if (!renderer->isReplaced() || renderer->isInlineBlock()) |
| verticalPosition -= (renderer->lineHeight(firstLine, lineDirection) - renderer->baselinePosition(baselineType(), firstLine, lineDirection)); |
| } else if (verticalAlign == BASELINE_MIDDLE) |
| verticalPosition += -renderer->lineHeight(firstLine, lineDirection) / 2 + renderer->baselinePosition(baselineType(), firstLine, lineDirection); |
| else if (verticalAlign == LENGTH) { |
| LayoutUnit lineHeight; |
| //Per http://www.w3.org/TR/CSS21/visudet.html#propdef-vertical-align: 'Percentages: refer to the 'line-height' of the element itself'. |
| if (renderer->style()->verticalAlignLength().isPercent()) |
| lineHeight = renderer->style()->computedLineHeight(); |
| else |
| lineHeight = renderer->lineHeight(firstLine, lineDirection); |
| verticalPosition -= valueForLength(renderer->style()->verticalAlignLength(), lineHeight); |
| } |
| } |
| |
| // Store the cached value. |
| if (isRenderInline && !firstLine) |
| verticalPositionCache.set(renderer, baselineType(), verticalPosition); |
| |
| return verticalPosition; |
| } |
| |
| bool RootInlineBox::includeLeadingForBox(InlineBox* box) const |
| { |
| if (box->renderer().isReplaced() || (box->renderer().isText() && !box->isText())) |
| return false; |
| |
| LineBoxContain lineBoxContain = renderer().style()->lineBoxContain(); |
| return (lineBoxContain & LineBoxContainInline) || (box == this && (lineBoxContain & LineBoxContainBlock)); |
| } |
| |
| bool RootInlineBox::includeFontForBox(InlineBox* box) const |
| { |
| if (box->renderer().isReplaced() || (box->renderer().isText() && !box->isText())) |
| return false; |
| |
| if (!box->isText() && box->isInlineFlowBox() && !toInlineFlowBox(box)->hasTextChildren()) |
| return false; |
| |
| // For now map "glyphs" to "font" in vertical text mode until the bounds returned by glyphs aren't garbage. |
| LineBoxContain lineBoxContain = renderer().style()->lineBoxContain(); |
| return lineBoxContain & LineBoxContainFont; |
| } |
| |
| bool RootInlineBox::includeGlyphsForBox(InlineBox* box) const |
| { |
| if (box->renderer().isReplaced() || (box->renderer().isText() && !box->isText())) |
| return false; |
| |
| if (!box->isText() && box->isInlineFlowBox() && !toInlineFlowBox(box)->hasTextChildren()) |
| return false; |
| |
| // FIXME: We can't fit to glyphs yet for vertical text, since the bounds returned are garbage. |
| LineBoxContain lineBoxContain = renderer().style()->lineBoxContain(); |
| return lineBoxContain & LineBoxContainGlyphs; |
| } |
| |
| bool RootInlineBox::includeMarginForBox(InlineBox* box) const |
| { |
| if (box->renderer().isReplaced() || (box->renderer().isText() && !box->isText())) |
| return false; |
| |
| LineBoxContain lineBoxContain = renderer().style()->lineBoxContain(); |
| return lineBoxContain & LineBoxContainInlineBox; |
| } |
| |
| |
| bool RootInlineBox::fitsToGlyphs() const |
| { |
| // FIXME: We can't fit to glyphs yet for vertical text, since the bounds returned are garbage. |
| LineBoxContain lineBoxContain = renderer().style()->lineBoxContain(); |
| return lineBoxContain & LineBoxContainGlyphs; |
| } |
| |
| bool RootInlineBox::includesRootLineBoxFontOrLeading() const |
| { |
| LineBoxContain lineBoxContain = renderer().style()->lineBoxContain(); |
| return (lineBoxContain & LineBoxContainBlock) || (lineBoxContain & LineBoxContainInline) || (lineBoxContain & LineBoxContainFont); |
| } |
| |
| Node* RootInlineBox::getLogicalStartBoxWithNode(InlineBox*& startBox) const |
| { |
| Vector<InlineBox*> leafBoxesInLogicalOrder; |
| collectLeafBoxesInLogicalOrder(leafBoxesInLogicalOrder); |
| for (size_t i = 0; i < leafBoxesInLogicalOrder.size(); ++i) { |
| if (leafBoxesInLogicalOrder[i]->renderer().node()) { |
| startBox = leafBoxesInLogicalOrder[i]; |
| return startBox->renderer().node(); |
| } |
| } |
| startBox = 0; |
| return 0; |
| } |
| |
| Node* RootInlineBox::getLogicalEndBoxWithNode(InlineBox*& endBox) const |
| { |
| Vector<InlineBox*> leafBoxesInLogicalOrder; |
| collectLeafBoxesInLogicalOrder(leafBoxesInLogicalOrder); |
| for (size_t i = leafBoxesInLogicalOrder.size(); i > 0; --i) { |
| if (leafBoxesInLogicalOrder[i - 1]->renderer().node()) { |
| endBox = leafBoxesInLogicalOrder[i - 1]; |
| return endBox->renderer().node(); |
| } |
| } |
| endBox = 0; |
| return 0; |
| } |
| |
| #ifndef NDEBUG |
| const char* RootInlineBox::boxName() const |
| { |
| return "RootInlineBox"; |
| } |
| #endif |
| |
| } // namespace blink |
