| /* |
| * 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 "config.h" |
| #include "RootInlineBox.h" |
| |
| #include "BidiResolver.h" |
| #include "Chrome.h" |
| #include "ChromeClient.h" |
| #include "Document.h" |
| #include "EllipsisBox.h" |
| #include "Frame.h" |
| #include "GraphicsContext.h" |
| #include "HitTestResult.h" |
| #include "InlineTextBox.h" |
| #include "Page.h" |
| #include "PaintInfo.h" |
| #include "RenderArena.h" |
| #include "RenderBlock.h" |
| #include "VerticalPositionCache.h" |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| typedef WTF::HashMap<const RootInlineBox*, EllipsisBox*> EllipsisBoxMap; |
| static EllipsisBoxMap* gEllipsisBoxMap = 0; |
| |
| RootInlineBox::RootInlineBox(RenderBlock* block) |
| : InlineFlowBox(block) |
| , m_lineBreakObj(0) |
| , m_lineBreakPos(0) |
| , m_lineTop(0) |
| , m_lineBottom(0) |
| , m_paginationStrut(0) |
| , m_blockLogicalHeight(0) |
| , m_baselineType(AlphabeticBaseline) |
| , m_hasAnnotationsBefore(false) |
| , m_hasAnnotationsAfter(false) |
| { |
| setIsHorizontal(block->isHorizontalWritingMode()); |
| } |
| |
| |
| void RootInlineBox::destroy(RenderArena* arena) |
| { |
| detachEllipsisBox(arena); |
| InlineFlowBox::destroy(arena); |
| } |
| |
| void RootInlineBox::detachEllipsisBox(RenderArena* arena) |
| { |
| if (hasEllipsisBox()) { |
| EllipsisBox* box = gEllipsisBoxMap->take(this); |
| box->setParent(0); |
| box->destroy(arena); |
| setHasEllipsisBox(false); |
| } |
| } |
| |
| RenderLineBoxList* RootInlineBox::rendererLineBoxes() const |
| { |
| return block()->lineBoxes(); |
| } |
| |
| void RootInlineBox::clearTruncation() |
| { |
| if (hasEllipsisBox()) { |
| detachEllipsisBox(renderer()->renderArena()); |
| InlineFlowBox::clearTruncation(); |
| } |
| } |
| |
| 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); |
| } |
| |
| void RootInlineBox::placeEllipsis(const AtomicString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, |
| InlineBox* markupBox) |
| { |
| // Create an ellipsis box. |
| EllipsisBox* ellipsisBox = new (renderer()->renderArena()) EllipsisBox(renderer(), ellipsisStr, this, |
| ellipsisWidth - (markupBox ? markupBox->logicalWidth() : 0), logicalHeight(), |
| y(), !prevRootBox(), isHorizontal(), markupBox); |
| |
| if (!gEllipsisBoxMap) |
| gEllipsisBoxMap = new EllipsisBoxMap(); |
| gEllipsisBoxMap->add(this, ellipsisBox); |
| setHasEllipsisBox(true); |
| |
| // FIXME: Do we need an RTL version of this? |
| if (ltr && (x() + logicalWidth() + ellipsisWidth) <= blockRightEdge) { |
| ellipsisBox->m_x = x() + logicalWidth(); |
| return; |
| } |
| |
| // 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; |
| ellipsisBox->m_x = placeEllipsisBox(ltr, blockLeftEdge, blockRightEdge, ellipsisWidth, foundBox); |
| } |
| |
| float RootInlineBox::placeEllipsisBox(bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, bool& foundBox) |
| { |
| float result = InlineFlowBox::placeEllipsisBox(ltr, blockLeftEdge, blockRightEdge, ellipsisWidth, foundBox); |
| if (result == -1) |
| result = ltr ? blockRightEdge - ellipsisWidth : blockLeftEdge; |
| return result; |
| } |
| |
| void RootInlineBox::paintEllipsisBox(PaintInfo& paintInfo, int tx, int ty, int lineTop, int lineBottom) const |
| { |
| if (hasEllipsisBox() && paintInfo.shouldPaintWithinRoot(renderer()) && renderer()->style()->visibility() == VISIBLE |
| && paintInfo.phase == PaintPhaseForeground) |
| ellipsisBox()->paint(paintInfo, tx, ty, lineTop, lineBottom); |
| } |
| |
| #if PLATFORM(MAC) |
| |
| void RootInlineBox::addHighlightOverflow() |
| { |
| Frame* frame = renderer()->frame(); |
| if (!frame) |
| return; |
| Page* page = frame->page(); |
| if (!page) |
| return; |
| |
| // Highlight acts as a selection inflation. |
| FloatRect rootRect(0, selectionTop(), logicalWidth(), selectionHeight()); |
| IntRect inflatedRect = enclosingIntRect(page->chrome()->client()->customHighlightRect(renderer()->node(), renderer()->style()->highlight(), rootRect)); |
| setOverflowFromLogicalRects(inflatedRect, inflatedRect, lineTop(), lineBottom()); |
| } |
| |
| void RootInlineBox::paintCustomHighlight(PaintInfo& paintInfo, int tx, int ty, const AtomicString& highlightType) |
| { |
| if (!paintInfo.shouldPaintWithinRoot(renderer()) || renderer()->style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseForeground) |
| return; |
| |
| Frame* frame = renderer()->frame(); |
| if (!frame) |
| return; |
| Page* page = frame->page(); |
| if (!page) |
| return; |
| |
| // Get the inflated rect so that we can properly hit test. |
| FloatRect rootRect(tx + x(), ty + selectionTop(), logicalWidth(), selectionHeight()); |
| FloatRect inflatedRect = page->chrome()->client()->customHighlightRect(renderer()->node(), highlightType, rootRect); |
| if (inflatedRect.intersects(paintInfo.rect)) |
| page->chrome()->client()->paintCustomHighlight(renderer()->node(), highlightType, rootRect, rootRect, false, true); |
| } |
| |
| #endif |
| |
| void RootInlineBox::paint(PaintInfo& paintInfo, int tx, int ty, int lineTop, int lineBottom) |
| { |
| InlineFlowBox::paint(paintInfo, tx, ty, lineTop, lineBottom); |
| paintEllipsisBox(paintInfo, tx, ty, lineTop, lineBottom); |
| #if PLATFORM(MAC) |
| RenderStyle* styleToUse = renderer()->style(m_firstLine); |
| if (styleToUse->highlight() != nullAtom && !paintInfo.context->paintingDisabled()) |
| paintCustomHighlight(paintInfo, tx, ty, styleToUse->highlight()); |
| #endif |
| } |
| |
| bool RootInlineBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, int lineTop, int lineBottom) |
| { |
| if (hasEllipsisBox() && visibleToHitTesting()) { |
| if (ellipsisBox()->nodeAtPoint(request, result, x, y, tx, ty, lineTop, lineBottom)) { |
| renderer()->updateHitTestResult(result, IntPoint(x - tx, y - ty)); |
| return true; |
| } |
| } |
| return InlineFlowBox::nodeAtPoint(request, result, x, y, tx, ty, lineTop, lineBottom); |
| } |
| |
| void RootInlineBox::adjustPosition(float dx, float dy) |
| { |
| InlineFlowBox::adjustPosition(dx, dy); |
| int blockDirectionDelta = isHorizontal() ? dy : dx; // The block direction delta will always be integral. |
| m_lineTop += blockDirectionDelta; |
| m_lineBottom += blockDirectionDelta; |
| m_blockLogicalHeight += blockDirectionDelta; |
| } |
| |
| 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(); |
| } |
| } |
| |
| int RootInlineBox::alignBoxesInBlockDirection(int heightOfBlock, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache& verticalPositionCache) |
| { |
| #if ENABLE(SVG) |
| // SVG will handle vertical alignment on its own. |
| if (isSVGRootInlineBox()) |
| return 0; |
| #endif |
| |
| int maxPositionTop = 0; |
| int maxPositionBottom = 0; |
| int maxAscent = 0; |
| int maxDescent = 0; |
| bool setMaxAscent = false; |
| bool setMaxDescent = false; |
| |
| // Figure out if we're in no-quirks mode. |
| bool noQuirksMode = renderer()->document()->inNoQuirksMode(); |
| |
| m_baselineType = requiresIdeographicBaseline(textBoxDataMap) ? IdeographicBaseline : AlphabeticBaseline; |
| |
| computeLogicalBoxHeights(this, maxPositionTop, maxPositionBottom, maxAscent, maxDescent, setMaxAscent, setMaxDescent, noQuirksMode, |
| textBoxDataMap, baselineType(), verticalPositionCache); |
| |
| if (maxAscent + maxDescent < max(maxPositionTop, maxPositionBottom)) |
| adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom); |
| |
| int maxHeight = maxAscent + maxDescent; |
| int lineTop = heightOfBlock; |
| int lineBottom = heightOfBlock; |
| int lineTopIncludingMargins = heightOfBlock; |
| int lineBottomIncludingMargins = heightOfBlock; |
| bool setLineTop = false; |
| bool hasAnnotationsBefore = false; |
| bool hasAnnotationsAfter = false; |
| placeBoxesInBlockDirection(heightOfBlock, maxHeight, maxAscent, noQuirksMode, lineTop, lineBottom, setLineTop, |
| lineTopIncludingMargins, lineBottomIncludingMargins, hasAnnotationsBefore, hasAnnotationsAfter, baselineType()); |
| m_hasAnnotationsBefore = hasAnnotationsBefore; |
| m_hasAnnotationsAfter = hasAnnotationsAfter; |
| setLineTopBottomPositions(lineTop, lineBottom); |
| |
| int 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); |
| heightOfBlock += annotationsAdjustment; |
| } |
| |
| maxHeight = max(0, maxHeight); |
| |
| return heightOfBlock + maxHeight; |
| } |
| |
| int RootInlineBox::beforeAnnotationsAdjustment() const |
| { |
| int result = 0; |
| |
| if (!renderer()->style()->isFlippedLinesWritingMode()) { |
| // 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. |
| int highestAllowedPosition = prevRootBox() ? min(prevRootBox()->lineBottom(), lineTop()) + result : block()->borderBefore(); |
| result = computeOverAnnotationAdjustment(highestAllowedPosition); |
| } else { |
| // Annotations under this line may push us up. |
| if (hasAnnotationsBefore()) |
| result = computeUnderAnnotationAdjustment(prevRootBox() ? prevRootBox()->lineBottom() : block()->borderBefore()); |
| |
| if (!prevRootBox() || !prevRootBox()->hasAnnotationsAfter()) |
| return result; |
| |
| // We have to compute the expansion for annotations over the previous line to see how much we should move. |
| int lowestAllowedPosition = max(prevRootBox()->lineBottom(), lineTop()) - result; |
| result = prevRootBox()->computeOverAnnotationAdjustment(lowestAllowedPosition); |
| } |
| |
| return result; |
| } |
| |
| GapRects RootInlineBox::lineSelectionGap(RenderBlock* rootBlock, const IntPoint& rootBlockPhysicalPosition, const IntSize& offsetFromRootBlock, |
| int selTop, int 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. |
| int lastLogicalLeft = firstBox->logicalRight(); |
| bool isPreviousBoxSelected = firstBox->selectionState() != RenderObject::SelectionNone; |
| for (InlineBox* box = firstBox->nextLeafChild(); box; box = box->nextLeafChild()) { |
| if (box->selectionState() != RenderObject::SelectionNone) { |
| IntRect logicalRect(lastLogicalLeft, selTop, box->logicalLeft() - lastLogicalLeft, selHeight); |
| logicalRect.move(renderer()->isHorizontalWritingMode() ? offsetFromRootBlock : IntSize(offsetFromRootBlock.height(), offsetFromRootBlock.width())); |
| IntRect gapRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, logicalRect); |
| if (isPreviousBoxSelected && gapRect.width() > 0 && gapRect.height() > 0) { |
| if (paintInfo && box->parent()->renderer()->style()->visibility() == VISIBLE) |
| paintInfo->context->fillRect(gapRect, box->parent()->renderer()->selectionBackgroundColor(), box->parent()->renderer()->style()->colorSpace()); |
| // 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; |
| 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; |
| } |
| |
| int RootInlineBox::selectionTop() const |
| { |
| int selectionTop = m_lineTop; |
| |
| if (m_hasAnnotationsBefore) |
| selectionTop -= !renderer()->style()->isFlippedLinesWritingMode() ? computeOverAnnotationAdjustment(m_lineTop) : computeUnderAnnotationAdjustment(m_lineTop); |
| |
| if (renderer()->style()->isFlippedLinesWritingMode()) |
| return selectionTop; |
| |
| int prevBottom = prevRootBox() ? prevRootBox()->selectionBottom() : block()->borderBefore() + block()->paddingBefore(); |
| if (prevBottom < selectionTop && block()->containsFloats()) { |
| // This line has actually been moved further down, probably from a large line-height, but possibly because the |
| // line was forced to clear floats. If so, let's check the offsets, and only be willing to use the previous |
| // line's bottom if the offsets are greater on both sides. |
| int prevLeft = block()->logicalLeftOffsetForLine(prevBottom, false); |
| int prevRight = block()->logicalRightOffsetForLine(prevBottom, false); |
| int newLeft = block()->logicalLeftOffsetForLine(selectionTop, false); |
| int newRight = block()->logicalRightOffsetForLine(selectionTop, false); |
| if (prevLeft > newLeft || prevRight < newRight) |
| return selectionTop; |
| } |
| |
| return prevBottom; |
| } |
| |
| int RootInlineBox::selectionBottom() const |
| { |
| int selectionBottom = m_lineBottom; |
| |
| if (m_hasAnnotationsAfter) |
| selectionBottom += !renderer()->style()->isFlippedLinesWritingMode() ? computeUnderAnnotationAdjustment(m_lineBottom) : computeOverAnnotationAdjustment(m_lineBottom); |
| |
| if (!renderer()->style()->isFlippedLinesWritingMode() || !nextRootBox()) |
| return selectionBottom; |
| |
| int nextTop = nextRootBox()->selectionTop(); |
| if (nextTop > selectionBottom && block()->containsFloats()) { |
| // The next line has actually been moved further over, probably from a large line-height, but possibly because the |
| // line was forced to clear floats. If so, let's check the offsets, and only be willing to use the next |
| // line's top if the offsets are greater on both sides. |
| int nextLeft = block()->logicalLeftOffsetForLine(nextTop, false); |
| int nextRight = block()->logicalRightOffsetForLine(nextTop, false); |
| int newLeft = block()->logicalLeftOffsetForLine(selectionBottom, false); |
| int newRight = block()->logicalRightOffsetForLine(selectionBottom, false); |
| if (nextLeft > newLeft || nextRight < newRight) |
| return selectionBottom; |
| } |
| |
| return nextTop; |
| } |
| |
| RenderBlock* RootInlineBox::block() const |
| { |
| return toRenderBlock(renderer()); |
| } |
| |
| static bool isEditableLeaf(InlineBox* leaf) |
| { |
| return leaf && leaf->renderer() && leaf->renderer()->node() && leaf->renderer()->node()->rendererIsEditable(); |
| } |
| |
| InlineBox* RootInlineBox::closestLeafChildForLogicalLeftPosition(int leftPosition, bool onlyEditableLeaves) |
| { |
| InlineBox* firstLeaf = firstLeafChild(); |
| InlineBox* lastLeaf = lastLeafChild(); |
| if (firstLeaf == lastLeaf && (!onlyEditableLeaves || isEditableLeaf(firstLeaf))) |
| return firstLeaf; |
| |
| // Avoid returning a list marker when possible. |
| if (leftPosition <= firstLeaf->logicalLeft() && !firstLeaf->renderer()->isListMarker() && (!onlyEditableLeaves || isEditableLeaf(firstLeaf))) |
| // The leftPosition coordinate is less or equal to left edge of the firstLeaf. |
| // Return it. |
| return firstLeaf; |
| |
| if (leftPosition >= lastLeaf->logicalRight() && !lastLeaf->renderer()->isListMarker() && (!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->nextLeafChild()) { |
| if (!leaf->renderer()->isListMarker() && (!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(m_lineBreakBidiStatusEor, m_lineBreakBidiStatusLastStrong, m_lineBreakBidiStatusLast, m_lineBreakContext); |
| } |
| |
| void RootInlineBox::setLineBreakInfo(RenderObject* obj, unsigned breakPos, const BidiStatus& status) |
| { |
| 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); |
| } |
| |
| IntRect RootInlineBox::paddedLayoutOverflowRect(int endPadding) const |
| { |
| IntRect lineLayoutOverflow = layoutOverflowRect(lineTop(), lineBottom()); |
| if (!endPadding) |
| return lineLayoutOverflow; |
| |
| if (isHorizontal()) { |
| if (isLeftToRightDirection()) |
| lineLayoutOverflow.shiftMaxXEdgeTo(max(lineLayoutOverflow.maxX(), pixelSnappedLogicalRight() + endPadding)); |
| else |
| lineLayoutOverflow.shiftXEdgeTo(min(lineLayoutOverflow.x(), pixelSnappedLogicalLeft() - endPadding)); |
| } else { |
| if (isLeftToRightDirection()) |
| lineLayoutOverflow.shiftMaxYEdgeTo(max(lineLayoutOverflow.maxY(), pixelSnappedLogicalRight() + endPadding)); |
| else |
| lineLayoutOverflow.shiftYEdgeTo(min(lineLayoutOverflow.y(), pixelSnappedLogicalLeft() - 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 = max(ascent, newAscent); |
| descent = 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(m_firstLine)->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(static_cast<InlineTextBox*>(box)); |
| usedFonts = it == textBoxDataMap.end() ? 0 : &it->second.first; |
| glyphOverflow = it == textBoxDataMap.end() ? 0 : &it->second.second; |
| } |
| |
| bool includeLeading = includeLeadingForBox(box); |
| bool includeFont = includeFontForBox(box); |
| |
| bool setUsedFont = false; |
| bool setUsedFontWithLeading = false; |
| |
| if (usedFonts && !usedFonts->isEmpty() && (includeFont || (box->renderer()->style(m_firstLine)->lineHeight().isNegative() && includeLeading))) { |
| usedFonts->append(box->renderer()->style(m_firstLine)->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(m_firstLine)->fontMetrics().ascent(); |
| int fontDescent = box->renderer()->style(m_firstLine)->fontMetrics().descent(); |
| 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 = min(glyphOverflow->top, max(0, glyphOverflow->top - box->renderer()->style(m_firstLine)->fontMetrics().ascent())); |
| glyphOverflow->bottom = min(glyphOverflow->bottom, max(0, glyphOverflow->bottom - box->renderer()->style(m_firstLine)->fontMetrics().descent())); |
| } |
| |
| if (includeMarginForBox(box)) { |
| int ascentWithMargin = box->renderer()->style(m_firstLine)->fontMetrics().ascent(); |
| int descentWithMargin = box->renderer()->style(m_firstLine)->fontMetrics().descent(); |
| 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; |
| } |
| } |
| |
| int 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; |
| |
| // This method determines the vertical position for inline elements. |
| bool firstLine = m_firstLine; |
| if (firstLine && !renderer->document()->usesFirstLineRules()) |
| firstLine = false; |
| |
| // Check the cache. |
| bool isRenderInline = renderer->isRenderInline(); |
| if (isRenderInline && !firstLine) { |
| int verticalPosition = verticalPositionCache.get(renderer, baselineType()); |
| if (verticalPosition != PositionUndefined) |
| return verticalPosition; |
| } |
| |
| int 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.pixelSize(); |
| |
| LineDirectionMode lineDirection = parent->isHorizontalWritingMode() ? HorizontalLine : VerticalLine; |
| |
| 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 += -static_cast<int>(fontMetrics.xHeight() / 2) - renderer->lineHeight(firstLine, lineDirection) / 2 + renderer->baselinePosition(baselineType(), firstLine, lineDirection); |
| 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->isInlineBlockOrInlineTable()) |
| 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) |
| verticalPosition -= renderer->style()->verticalAlignLength().calcValue(renderer->lineHeight(firstLine, lineDirection)); |
| } |
| |
| // 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() && !static_cast<InlineFlowBox*>(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) || (!isHorizontal() && (lineBoxContain & LineBoxContainGlyphs)); |
| } |
| |
| bool RootInlineBox::includeGlyphsForBox(InlineBox* box) const |
| { |
| if (box->renderer()->isReplaced() || (box->renderer()->isText() && !box->isText())) |
| return false; |
| |
| if (!box->isText() && box->isInlineFlowBox() && !static_cast<InlineFlowBox*>(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 isHorizontal() && (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 isHorizontal() && (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; |
| } |
| |
| } // namespace WebCore |
