| /* |
| * Copyright (C) 2003-2017 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 "LogicalSelectionOffsetCaches.h" |
| #include "PaintInfo.h" |
| #include "RenderFragmentedFlow.h" |
| #include "RenderInline.h" |
| #include "RenderLayoutState.h" |
| #include "RenderRubyBase.h" |
| #include "RenderRubyRun.h" |
| #include "RenderRubyText.h" |
| #include "RenderView.h" |
| #include "VerticalPositionCache.h" |
| #include <wtf/IsoMallocInlines.h> |
| |
| namespace WebCore { |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(RootInlineBox); |
| |
| struct SameSizeAsRootInlineBox : public InlineFlowBox, public CanMakeWeakPtr<RootInlineBox> { |
| unsigned variables[7]; |
| void* pointers[3]; |
| }; |
| |
| COMPILE_ASSERT(sizeof(RootInlineBox) == sizeof(SameSizeAsRootInlineBox), RootInlineBox_should_stay_small); |
| |
| typedef WTF::HashMap<const RootInlineBox*, std::unique_ptr<EllipsisBox>> EllipsisBoxMap; |
| static EllipsisBoxMap* gEllipsisBoxMap; |
| |
| static ContainingFragmentMap& containingFragmentMap(RenderBlockFlow& block) |
| { |
| ASSERT(block.enclosingFragmentedFlow()); |
| return block.enclosingFragmentedFlow()->containingFragmentMap(); |
| } |
| |
| RootInlineBox::RootInlineBox(RenderBlockFlow& block) |
| : InlineFlowBox(block) |
| { |
| setIsHorizontal(block.isHorizontalWritingMode()); |
| } |
| |
| RootInlineBox::~RootInlineBox() |
| { |
| detachEllipsisBox(); |
| |
| if (blockFlow().enclosingFragmentedFlow()) |
| containingFragmentMap(blockFlow()).remove(this); |
| } |
| |
| void RootInlineBox::detachEllipsisBox() |
| { |
| if (hasEllipsisBox()) { |
| auto box = gEllipsisBoxMap->take(this); |
| box->setParent(nullptr); |
| setHasEllipsisBox(false); |
| } |
| } |
| |
| void RootInlineBox::clearTruncation() |
| { |
| if (hasEllipsisBox()) { |
| detachEllipsisBox(); |
| InlineFlowBox::clearTruncation(); |
| } |
| } |
| |
| bool RootInlineBox::isHyphenated() const |
| { |
| for (InlineBox* box = firstLeafDescendant(); box; box = box->nextLeafOnLine()) { |
| if (is<InlineTextBox>(*box) && downcast<InlineTextBox>(*box).hasHyphen()) |
| return true; |
| } |
| return false; |
| } |
| |
| int RootInlineBox::baselinePosition(FontBaseline baselineType) const |
| { |
| return renderer().baselinePosition(baselineType, isFirstLine(), isHorizontal() ? HorizontalLine : VerticalLine, PositionOfInteriorLineBoxes); |
| } |
| |
| LayoutUnit RootInlineBox::lineHeight() const |
| { |
| return renderer().lineHeight(isFirstLine(), isHorizontal() ? HorizontalLine : VerticalLine, 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 AtomString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, InlineBox* markupBox) |
| { |
| if (!gEllipsisBoxMap) |
| gEllipsisBoxMap = new EllipsisBoxMap(); |
| |
| ASSERT(!hasEllipsisBox()); |
| auto* ellipsisBox = gEllipsisBoxMap->set(this, makeUnique<EllipsisBox>(blockFlow(), ellipsisStr, this, ellipsisWidth - (markupBox ? markupBox->logicalWidth() : 0), logicalHeight(), y(), !prevRootBox(), isHorizontal(), markupBox)).iterator->value.get(); |
| setHasEllipsisBox(true); |
| // FIXME: Do we need an RTL version of this? |
| if (ltr && (x() + logicalWidth() + ellipsisWidth) <= blockRightEdge) { |
| ellipsisBox->setX(x() + 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->setX(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) const |
| { |
| if (hasEllipsisBox() && paintInfo.shouldPaintWithinRoot(renderer()) && renderer().style().visibility() == Visibility::Visible && paintInfo.phase == PaintPhase::Foreground) |
| ellipsisBox()->paint(paintInfo, paintOffset, lineTop, lineBottom); |
| } |
| |
| void RootInlineBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom) |
| { |
| InlineFlowBox::paint(paintInfo, paintOffset, lineTop, lineBottom); |
| paintEllipsisBox(paintInfo, paintOffset, lineTop, lineBottom); |
| } |
| |
| bool RootInlineBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom, HitTestAction hitTestAction) |
| { |
| if (hasEllipsisBox() && visibleToHitTesting()) { |
| if (ellipsisBox()->nodeAtPoint(request, result, locationInContainer, accumulatedOffset, lineTop, lineBottom, hitTestAction)) { |
| renderer().updateHitTestResult(result, locationInContainer.point() - toLayoutSize(accumulatedOffset)); |
| return true; |
| } |
| } |
| return InlineFlowBox::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, lineTop, lineBottom, hitTestAction); |
| } |
| |
| void RootInlineBox::adjustPosition(float dx, float dy) |
| { |
| InlineFlowBox::adjustPosition(dx, dy); |
| LayoutUnit blockDirectionDelta { isHorizontal() ? dy : dx }; // The block direction delta is a LayoutUnit. |
| m_lineTop += blockDirectionDelta; |
| m_lineBottom += blockDirectionDelta; |
| m_lineTopWithLeading += blockDirectionDelta; |
| m_lineBottomWithLeading += blockDirectionDelta; |
| if (hasEllipsisBox()) |
| ellipsisBox()->adjustPosition(dx, dy); |
| } |
| |
| void RootInlineBox::childRemoved(InlineBox* box) |
| { |
| if (&box->renderer() == m_lineBreakObj) |
| setLineBreakInfo(nullptr, 0, BidiStatus()); |
| |
| for (RootInlineBox* prev = prevRootBox(); prev && prev->lineBreakObj() == &box->renderer(); prev = prev->prevRootBox()) { |
| prev->setLineBreakInfo(nullptr, 0, BidiStatus()); |
| prev->markDirty(); |
| } |
| } |
| |
| RenderFragmentContainer* RootInlineBox::containingFragment() const |
| { |
| ContainingFragmentMap& fragmentMap = containingFragmentMap(blockFlow()); |
| bool hasContainingFragment = fragmentMap.contains(this); |
| RenderFragmentContainer* fragment = hasContainingFragment ? fragmentMap.get(this) : nullptr; |
| |
| #ifndef NDEBUG |
| if (hasContainingFragment) { |
| RenderFragmentedFlow* fragmentedFlow = blockFlow().enclosingFragmentedFlow(); |
| const RenderFragmentContainerList& fragmentList = fragmentedFlow->renderFragmentContainerList(); |
| ASSERT_WITH_SECURITY_IMPLICATION(fragmentList.contains(fragment)); |
| } |
| #endif |
| |
| return fragment; |
| } |
| |
| void RootInlineBox::clearContainingFragment() |
| { |
| ASSERT(!isDirty()); |
| |
| if (!containingFragmentMap(blockFlow()).contains(this)) |
| return; |
| |
| containingFragmentMap(blockFlow()).remove(this); |
| } |
| |
| void RootInlineBox::setContainingFragment(RenderFragmentContainer& fragment) |
| { |
| ASSERT(!isDirty()); |
| |
| containingFragmentMap(blockFlow()).set(this, &fragment); |
| } |
| |
| LayoutUnit RootInlineBox::alignBoxesInBlockDirection(LayoutUnit heightOfBlock, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache& verticalPositionCache) |
| { |
| // SVG will handle vertical alignment on its own. |
| if (isSVGRootInlineBox()) |
| return 0; |
| |
| LayoutUnit maxPositionTop; |
| LayoutUnit maxPositionBottom; |
| 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 < 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; |
| 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; |
| |
| maxHeight = std::max<LayoutUnit>(0, maxHeight); // FIXME: Is this really necessary? |
| |
| LayoutUnit lineTopWithLeading = heightOfBlock; |
| LayoutUnit lineBottomWithLeading = heightOfBlock + maxHeight; |
| setLineTopBottomPositions(lineTop, lineBottom, lineTopWithLeading, lineBottomWithLeading); |
| setPaginatedLineWidth(blockFlow().availableLogicalWidthForContent(heightOfBlock)); |
| |
| 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); |
| heightOfBlock += annotationsAdjustment; |
| } |
| |
| LayoutUnit gridSnapAdjustment = lineSnapAdjustment(); |
| if (gridSnapAdjustment) { |
| adjustBlockDirectionPosition(gridSnapAdjustment); |
| heightOfBlock += gridSnapAdjustment; |
| } |
| |
| return heightOfBlock + maxHeight; |
| } |
| |
| LayoutUnit RootInlineBox::beforeAnnotationsAdjustment() const |
| { |
| LayoutUnit result; |
| |
| 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. |
| LayoutUnit highestAllowedPosition = prevRootBox() ? std::min(prevRootBox()->lineBottom(), lineTop()) + result : blockFlow().borderBefore(); |
| result = computeOverAnnotationAdjustment(highestAllowedPosition); |
| } else { |
| // Annotations under this line may push us up. |
| if (hasAnnotationsBefore()) |
| result = computeUnderAnnotationAdjustment(prevRootBox() ? prevRootBox()->lineBottom() : blockFlow().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. |
| LayoutUnit lowestAllowedPosition = std::max(prevRootBox()->lineBottom(), lineTop()) - result; |
| result = prevRootBox()->computeOverAnnotationAdjustment(lowestAllowedPosition); |
| } |
| |
| return result; |
| } |
| |
| LayoutUnit RootInlineBox::lineSnapAdjustment(LayoutUnit delta) const |
| { |
| // If our block doesn't have snapping turned on, do nothing. |
| // FIXME: Implement bounds snapping. |
| if (blockFlow().style().lineSnap() == LineSnap::None) |
| return 0; |
| |
| // Get the current line grid and offset. |
| auto* layoutState = blockFlow().view().frameView().layoutContext().layoutState(); |
| RenderBlockFlow* lineGrid = layoutState->lineGrid(); |
| LayoutSize lineGridOffset = layoutState->lineGridOffset(); |
| if (!lineGrid || lineGrid->style().writingMode() != blockFlow().style().writingMode()) |
| return 0; |
| |
| // Get the hypothetical line box used to establish the grid. |
| RootInlineBox* lineGridBox = lineGrid->lineGridBox(); |
| if (!lineGridBox) |
| return 0; |
| |
| LayoutUnit lineGridBlockOffset = lineGrid->isHorizontalWritingMode() ? lineGridOffset.height() : lineGridOffset.width(); |
| LayoutUnit blockOffset = blockFlow().isHorizontalWritingMode() ? layoutState->layoutOffset().height() : layoutState->layoutOffset().width(); |
| |
| // Now determine our position on the grid. Our baseline needs to be adjusted to the nearest baseline multiple |
| // as established by the line box. |
| // FIXME: Need to handle crazy line-box-contain values that cause the root line box to not be considered. I assume |
| // the grid should honor line-box-contain. |
| LayoutUnit gridLineHeight = lineGridBox->lineBottomWithLeading() - lineGridBox->lineTopWithLeading(); |
| if (!gridLineHeight) |
| return 0; |
| |
| LayoutUnit lineGridFontAscent = lineGrid->style().fontMetrics().ascent(baselineType()); |
| LayoutUnit lineGridFontHeight { lineGridBox->logicalHeight() }; |
| LayoutUnit firstTextTop { lineGridBlockOffset + lineGridBox->logicalTop() }; |
| LayoutUnit firstLineTopWithLeading = lineGridBlockOffset + lineGridBox->lineTopWithLeading(); |
| LayoutUnit firstBaselinePosition = firstTextTop + lineGridFontAscent; |
| |
| LayoutUnit currentTextTop { blockOffset + logicalTop() + delta }; |
| LayoutUnit currentFontAscent = blockFlow().style().fontMetrics().ascent(baselineType()); |
| LayoutUnit currentBaselinePosition = currentTextTop + currentFontAscent; |
| |
| LayoutUnit lineGridPaginationOrigin = isHorizontal() ? layoutState->lineGridPaginationOrigin().height() : layoutState->lineGridPaginationOrigin().width(); |
| |
| // If we're paginated, see if we're on a page after the first one. If so, the grid resets on subsequent pages. |
| // FIXME: If the grid is an ancestor of the pagination establisher, then this is incorrect. |
| LayoutUnit pageLogicalTop; |
| if (layoutState->isPaginated() && layoutState->pageLogicalHeight()) { |
| pageLogicalTop = blockFlow().pageLogicalTopForOffset(lineTopWithLeading() + delta); |
| if (pageLogicalTop > firstLineTopWithLeading) |
| firstTextTop = pageLogicalTop + lineGridBox->logicalTop() - lineGrid->borderAndPaddingBefore() + lineGridPaginationOrigin; |
| } |
| |
| if (blockFlow().style().lineSnap() == LineSnap::Contain) { |
| // Compute the desired offset from the text-top of a grid line. |
| // Look at our height (logicalHeight()). |
| // Look at the total available height. It's going to be (textBottom - textTop) + (n-1)*(multiple with leading) |
| // where n is number of grid lines required to enclose us. |
| if (logicalHeight() <= lineGridFontHeight) |
| firstTextTop += (lineGridFontHeight - logicalHeight()) / 2; |
| else { |
| LayoutUnit numberOfLinesWithLeading { ceilf(static_cast<float>(logicalHeight() - lineGridFontHeight) / gridLineHeight) }; |
| LayoutUnit totalHeight = lineGridFontHeight + numberOfLinesWithLeading * gridLineHeight; |
| firstTextTop += (totalHeight - logicalHeight()) / 2; |
| } |
| firstBaselinePosition = firstTextTop + currentFontAscent; |
| } else |
| firstBaselinePosition = firstTextTop + lineGridFontAscent; |
| |
| // If we're above the first line, just push to the first line. |
| if (currentBaselinePosition < firstBaselinePosition) |
| return delta + firstBaselinePosition - currentBaselinePosition; |
| |
| // Otherwise we're in the middle of the grid somewhere. Just push to the next line. |
| LayoutUnit baselineOffset = currentBaselinePosition - firstBaselinePosition; |
| LayoutUnit remainder = roundToInt(baselineOffset) % roundToInt(gridLineHeight); |
| LayoutUnit result = delta; |
| if (remainder) |
| result += gridLineHeight - remainder; |
| |
| // If we aren't paginated we can return the result. |
| if (!layoutState->isPaginated() || !layoutState->pageLogicalHeight() || result == delta) |
| return result; |
| |
| // We may end up shifted to a new page. We need to do a re-snap when that happens. |
| LayoutUnit newPageLogicalTop = blockFlow().pageLogicalTopForOffset(lineBottomWithLeading() + result); |
| if (newPageLogicalTop == pageLogicalTop) |
| return result; |
| |
| // Put ourselves at the top of the next page to force a snap onto the new grid established by that page. |
| return lineSnapAdjustment(newPageLogicalTop - (blockOffset + lineTopWithLeading())); |
| } |
| |
| GapRects RootInlineBox::lineSelectionGap(RenderBlock& rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, |
| LayoutUnit selTop, LayoutUnit selHeight, const LogicalSelectionOffsetCaches& cache, const PaintInfo* paintInfo) |
| { |
| RenderObject::HighlightState lineState = selectionState(); |
| |
| bool leftGap, rightGap; |
| blockFlow().getSelectionGapInfo(lineState, leftGap, rightGap); |
| |
| GapRects result; |
| |
| InlineBox* firstBox = firstSelectedBox(); |
| InlineBox* lastBox = lastSelectedBox(); |
| if (leftGap) { |
| result.uniteLeft(blockFlow().logicalLeftSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, &firstBox->parent()->renderer(), LayoutUnit(firstBox->logicalLeft()), |
| selTop, selHeight, cache, paintInfo)); |
| } |
| if (rightGap) { |
| result.uniteRight(blockFlow().logicalRightSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, &lastBox->parent()->renderer(), LayoutUnit(lastBox->logicalRight()), |
| selTop, selHeight, cache, 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::HighlightState::None; |
| for (InlineBox* box = firstBox->nextLeafOnLine(); box; box = box->nextLeafOnLine()) { |
| if (box->selectionState() != RenderObject::HighlightState::None) { |
| LayoutRect logicalRect { lastLogicalLeft, selTop, LayoutUnit(box->logicalLeft() - lastLogicalLeft), selHeight }; |
| logicalRect.move(renderer().isHorizontalWritingMode() ? offsetFromRootBlock : LayoutSize(offsetFromRootBlock.height(), offsetFromRootBlock.width())); |
| LayoutRect gapRect = rootBlock.logicalRectToPhysicalRect(rootBlockPhysicalPosition, logicalRect); |
| if (isPreviousBoxSelected && gapRect.width() > 0 && gapRect.height() > 0) { |
| if (paintInfo && box->parent()->renderer().style().visibility() == Visibility::Visible) |
| 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::HighlightState::None; |
| } |
| } |
| |
| return result; |
| } |
| |
| IntRect RootInlineBox::computeCaretRect(float logicalLeftPosition, unsigned caretWidth, LayoutUnit* extraWidthToEndOfLine) const |
| { |
| int height = selectionHeight(); |
| int top = selectionTop(); |
| |
| // Distribute the caret's width to either side of the offset. |
| float left = logicalLeftPosition; |
| int caretWidthLeftOfOffset = caretWidth / 2; |
| left -= caretWidthLeftOfOffset; |
| int caretWidthRightOfOffset = caretWidth - caretWidthLeftOfOffset; |
| left = roundf(left); |
| |
| float rootLeft = logicalLeft(); |
| float rootRight = logicalRight(); |
| |
| if (extraWidthToEndOfLine) |
| *extraWidthToEndOfLine = (logicalWidth() + rootLeft) - (left + caretWidth); |
| |
| const RenderStyle& blockStyle = blockFlow().style(); |
| |
| bool rightAligned = false; |
| switch (blockStyle.textAlign()) { |
| case TextAlignMode::Right: |
| case TextAlignMode::WebKitRight: |
| rightAligned = true; |
| break; |
| case TextAlignMode::Left: |
| case TextAlignMode::WebKitLeft: |
| case TextAlignMode::Center: |
| case TextAlignMode::WebKitCenter: |
| break; |
| case TextAlignMode::Justify: |
| case TextAlignMode::Start: |
| rightAligned = !blockStyle.isLeftToRightDirection(); |
| break; |
| case TextAlignMode::End: |
| rightAligned = blockStyle.isLeftToRightDirection(); |
| break; |
| } |
| |
| float leftEdge = std::min<float>(0, rootLeft); |
| float rightEdge = std::max<float>(blockFlow().logicalWidth(), rootRight); |
| |
| if (rightAligned) { |
| left = std::max(left, leftEdge); |
| left = std::min(left, rootRight - caretWidth); |
| } else { |
| left = std::min(left, rightEdge - caretWidthRightOfOffset); |
| left = std::max(left, rootLeft); |
| } |
| return blockStyle.isHorizontalWritingMode() ? IntRect(left, top, caretWidth, height) : IntRect(top, left, height, caretWidth); |
| } |
| |
| RenderObject::HighlightState RootInlineBox::selectionState() |
| { |
| // Walk over all of the selected boxes. |
| RenderObject::HighlightState state = RenderObject::HighlightState::None; |
| for (InlineBox* box = firstLeafDescendant(); box; box = box->nextLeafOnLine()) { |
| RenderObject::HighlightState boxState = box->selectionState(); |
| if ((boxState == RenderObject::HighlightState::Start && state == RenderObject::HighlightState::End) |
| || (boxState == RenderObject::HighlightState::End && state == RenderObject::HighlightState::Start)) |
| state = RenderObject::HighlightState::Both; |
| else if (state == RenderObject::HighlightState::None || ((boxState == RenderObject::HighlightState::Start || boxState == RenderObject::HighlightState::End) |
| && (state == RenderObject::HighlightState::None || state == RenderObject::HighlightState::Inside))) |
| state = boxState; |
| else if (boxState == RenderObject::HighlightState::None && state == RenderObject::HighlightState::Start) { |
| // We are past the end of the selection. |
| state = RenderObject::HighlightState::Both; |
| } |
| if (state == RenderObject::HighlightState::Both) |
| break; |
| } |
| |
| return state; |
| } |
| |
| InlineBox* RootInlineBox::firstSelectedBox() |
| { |
| for (auto* box = firstLeafDescendant(); box; box = box->nextLeafOnLine()) { |
| if (box->selectionState() != RenderObject::HighlightState::None) |
| return box; |
| } |
| return nullptr; |
| } |
| |
| InlineBox* RootInlineBox::lastSelectedBox() |
| { |
| for (auto* box = lastLeafDescendant(); box; box = box->previousLeafOnLine()) { |
| if (box->selectionState() != RenderObject::HighlightState::None) |
| return box; |
| } |
| return nullptr; |
| } |
| |
| LayoutUnit RootInlineBox::selectionTop(ForHitTesting forHitTesting) const |
| { |
| LayoutUnit selectionTop = m_lineTop; |
| |
| if (m_hasAnnotationsBefore) |
| selectionTop -= !renderer().style().isFlippedLinesWritingMode() ? computeOverAnnotationAdjustment(m_lineTop) : computeUnderAnnotationAdjustment(m_lineTop); |
| |
| if (renderer().style().isFlippedLinesWritingMode()) |
| return selectionTop; |
| |
| #if !PLATFORM(IOS_FAMILY) |
| // See rdar://problem/19692206 ... don't want to do this adjustment for iOS where overlap is ok and handled. |
| if (renderer().isRubyBase()) { |
| // The ruby base selection should avoid intruding into the ruby text. This is only the case if there is an actual ruby text above us. |
| RenderRubyBase* base = &downcast<RenderRubyBase>(renderer()); |
| RenderRubyRun* run = base->rubyRun(); |
| if (run) { |
| RenderRubyText* text = run->rubyText(); |
| if (text && text->logicalTop() < base->logicalTop()) { |
| // The ruby text is above the ruby base. Just return now in order to avoid painting on top of the ruby text. |
| return selectionTop; |
| } |
| } |
| } else if (renderer().isRubyText()) { |
| // The ruby text selection should go all the way to the selection top of the containing line. |
| RenderRubyText* text = &downcast<RenderRubyText>(renderer()); |
| RenderRubyRun* run = text->rubyRun(); |
| if (run && run->inlineBoxWrapper()) { |
| RenderRubyBase* base = run->rubyBase(); |
| if (base && text->logicalTop() < base->logicalTop()) { |
| // The ruby text is above the ruby base. |
| const RootInlineBox& containingLine = run->inlineBoxWrapper()->root(); |
| LayoutUnit enclosingSelectionTop = containingLine.selectionTop(); |
| LayoutUnit deltaBetweenObjects = text->logicalTop() + run->logicalTop(); |
| LayoutUnit selectionTopInRubyTextCoords = enclosingSelectionTop - deltaBetweenObjects; |
| return std::min(selectionTop, selectionTopInRubyTextCoords); |
| } |
| } |
| } |
| #endif |
| |
| LayoutUnit prevBottom; |
| if (auto* previousBox = prevRootBox()) |
| prevBottom = previousBox->selectionBottom(); |
| else { |
| auto borderAndPaddingBefore = blockFlow().borderAndPaddingBefore(); |
| prevBottom = forHitTesting == ForHitTesting::Yes ? borderAndPaddingBefore : std::max(borderAndPaddingBefore, selectionTop); |
| } |
| |
| if (prevBottom < selectionTop && blockFlow().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. |
| LayoutUnit prevLeft = blockFlow().logicalLeftOffsetForLine(prevBottom, DoNotIndentText); |
| LayoutUnit prevRight = blockFlow().logicalRightOffsetForLine(prevBottom, DoNotIndentText); |
| LayoutUnit newLeft = blockFlow().logicalLeftOffsetForLine(selectionTop, DoNotIndentText); |
| LayoutUnit newRight = blockFlow().logicalRightOffsetForLine(selectionTop, DoNotIndentText); |
| if (prevLeft > newLeft || prevRight < newRight) |
| return selectionTop; |
| } |
| |
| return prevBottom; |
| } |
| |
| static RenderBlock* blockBeforeWithinSelectionRoot(const RenderBlockFlow& blockFlow, LayoutSize& offset) |
| { |
| if (blockFlow.isSelectionRoot()) |
| return nullptr; |
| |
| const RenderElement* object = &blockFlow; |
| RenderObject* sibling; |
| do { |
| sibling = object->previousSibling(); |
| while (sibling && (!is<RenderBlock>(*sibling) || downcast<RenderBlock>(*sibling).isSelectionRoot())) |
| sibling = sibling->previousSibling(); |
| |
| offset -= LayoutSize(downcast<RenderBlock>(*object).logicalLeft(), downcast<RenderBlock>(*object).logicalTop()); |
| object = object->parent(); |
| } while (!sibling && is<RenderBlock>(object) && !downcast<RenderBlock>(*object).isSelectionRoot()); |
| |
| if (!sibling) |
| return nullptr; |
| |
| RenderBlock* beforeBlock = downcast<RenderBlock>(sibling); |
| |
| offset += LayoutSize(beforeBlock->logicalLeft(), beforeBlock->logicalTop()); |
| |
| RenderObject* child = beforeBlock->lastChild(); |
| while (is<RenderBlock>(child)) { |
| beforeBlock = downcast<RenderBlock>(child); |
| offset += LayoutSize(beforeBlock->logicalLeft(), beforeBlock->logicalTop()); |
| child = beforeBlock->lastChild(); |
| } |
| return beforeBlock; |
| } |
| |
| LayoutUnit RootInlineBox::selectionTopAdjustedForPrecedingBlock() const |
| { |
| const RootInlineBox& rootBox = root(); |
| LayoutUnit top = selectionTop(); |
| |
| auto blockSelectionState = rootBox.blockFlow().selectionState(); |
| if (blockSelectionState != RenderObject::HighlightState::Inside && blockSelectionState != RenderObject::HighlightState::End) |
| return top; |
| |
| LayoutSize offsetToBlockBefore; |
| auto* blockBefore = blockBeforeWithinSelectionRoot(rootBox.blockFlow(), offsetToBlockBefore); |
| if (!is<RenderBlockFlow>(blockBefore)) |
| return top; |
| |
| // Do not adjust blocks sharing the same line. |
| if (!offsetToBlockBefore.height()) |
| return top; |
| |
| if (auto* lastLine = downcast<RenderBlockFlow>(*blockBefore).lastRootBox()) { |
| RenderObject::HighlightState lastLineSelectionState = lastLine->selectionState(); |
| if (lastLineSelectionState != RenderObject::HighlightState::Inside && lastLineSelectionState != RenderObject::HighlightState::Start) |
| return top; |
| |
| LayoutUnit lastLineSelectionBottom = lastLine->selectionBottom() + offsetToBlockBefore.height(); |
| top = std::max(top, lastLineSelectionBottom); |
| } |
| return top; |
| } |
| |
| LayoutUnit RootInlineBox::selectionBottom() const |
| { |
| LayoutUnit selectionBottom = m_lineBottom; |
| |
| if (m_hasAnnotationsAfter) |
| selectionBottom += !renderer().style().isFlippedLinesWritingMode() ? computeUnderAnnotationAdjustment(m_lineBottom) : computeOverAnnotationAdjustment(m_lineBottom); |
| |
| if (!renderer().style().isFlippedLinesWritingMode() || !nextRootBox()) |
| return selectionBottom; |
| |
| #if !PLATFORM(IOS_FAMILY) |
| // See rdar://problem/19692206 ... don't want to do this adjustment for iOS where overlap is ok and handled. |
| if (renderer().isRubyBase()) { |
| // The ruby base selection should avoid intruding into the ruby text. This is only the case if there is an actual ruby text below us. |
| RenderRubyBase* base = &downcast<RenderRubyBase>(renderer()); |
| RenderRubyRun* run = base->rubyRun(); |
| if (run) { |
| RenderRubyText* text = run->rubyText(); |
| if (text && text->logicalTop() > base->logicalTop()) { |
| // The ruby text is below the ruby base. Just return now in order to avoid painting on top of the ruby text. |
| return selectionBottom; |
| } |
| } |
| } else if (renderer().isRubyText()) { |
| // The ruby text selection should go all the way to the selection bottom of the containing line. |
| RenderRubyText* text = &downcast<RenderRubyText>(renderer()); |
| RenderRubyRun* run = text->rubyRun(); |
| if (run && run->inlineBoxWrapper()) { |
| RenderRubyBase* base = run->rubyBase(); |
| if (base && text->logicalTop() > base->logicalTop()) { |
| // The ruby text is above the ruby base. |
| const RootInlineBox& containingLine = run->inlineBoxWrapper()->root(); |
| LayoutUnit enclosingSelectionBottom = containingLine.selectionBottom(); |
| LayoutUnit deltaBetweenObjects = text->logicalTop() + run->logicalTop(); |
| LayoutUnit selectionBottomInRubyTextCoords = enclosingSelectionBottom - deltaBetweenObjects; |
| return std::min(selectionBottom, selectionBottomInRubyTextCoords); |
| } |
| } |
| } |
| #endif |
| |
| LayoutUnit nextTop = nextRootBox()->selectionTop(); |
| if (nextTop > selectionBottom && blockFlow().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. |
| LayoutUnit nextLeft = blockFlow().logicalLeftOffsetForLine(nextTop, DoNotIndentText); |
| LayoutUnit nextRight = blockFlow().logicalRightOffsetForLine(nextTop, DoNotIndentText); |
| LayoutUnit newLeft = blockFlow().logicalLeftOffsetForLine(selectionBottom, DoNotIndentText); |
| LayoutUnit newRight = blockFlow().logicalRightOffsetForLine(selectionBottom, DoNotIndentText); |
| if (nextLeft > newLeft || nextRight < newRight) |
| return selectionBottom; |
| } |
| |
| return nextTop; |
| } |
| |
| int RootInlineBox::blockDirectionPointInLine() const |
| { |
| return !blockFlow().style().isFlippedBlocksWritingMode() ? std::max(lineTop(), selectionTop()) : std::min(lineBottom(), selectionBottom()); |
| } |
| |
| RenderBlockFlow& RootInlineBox::blockFlow() const |
| { |
| return downcast<RenderBlockFlow>(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(blockFlow().isHorizontalWritingMode() ? pointInContents.x() : pointInContents.y(), onlyEditableLeaves); |
| } |
| |
| InlineBox* RootInlineBox::closestLeafChildForLogicalLeftPosition(int leftPosition, bool onlyEditableLeaves) |
| { |
| InlineBox* firstLeaf = firstLeafDescendant(); |
| InlineBox* lastLeaf = lastLeafDescendant(); |
| |
| if (firstLeaf != lastLeaf) { |
| if (firstLeaf->isLineBreak()) |
| firstLeaf = firstLeaf->nextLeafOnLineIgnoringLineBreak(); |
| else if (lastLeaf->isLineBreak()) |
| lastLeaf = lastLeaf->previousLeafOnLineIgnoringLineBreak(); |
| } |
| |
| if (firstLeaf == lastLeaf && (!onlyEditableLeaves || isEditableLeaf(firstLeaf))) |
| return firstLeaf; |
| |
| // Avoid returning a list marker when possible. |
| if (firstLeaf && 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 (lastLeaf && 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 = nullptr; |
| for (InlineBox* leaf = firstLeaf; leaf; leaf = leaf->nextLeafOnLineIgnoringLineBreak()) { |
| 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 { static_cast<UCharDirection>(m_lineBreakBidiStatusEor), static_cast<UCharDirection>(m_lineBreakBidiStatusLastStrong), static_cast<UCharDirection>(m_lineBreakBidiStatusLast), m_lineBreakContext.copyRef() }; |
| } |
| |
| void RootInlineBox::setLineBreakInfo(RenderObject* object, unsigned breakPosition, const BidiStatus& status) |
| { |
| m_lineBreakObj = makeWeakPtr(object); |
| m_lineBreakPos = breakPosition; |
| m_lineBreakBidiStatusEor = status.eor; |
| m_lineBreakBidiStatusLastStrong = status.lastStrong; |
| m_lineBreakBidiStatusLast = status.last; |
| m_lineBreakContext = status.context; |
| } |
| |
| EllipsisBox* RootInlineBox::ellipsisBox() const |
| { |
| if (!hasEllipsisBox()) |
| return nullptr; |
| return gEllipsisBoxMap->get(this); |
| } |
| |
| void RootInlineBox::removeLineBoxFromRenderObject() |
| { |
| // Null if we are destroying ComplexLineLayout. |
| if (auto* complexLineLayout = blockFlow().complexLineLayout()) |
| complexLineLayout->lineBoxes().removeLineBox(this); |
| } |
| |
| void RootInlineBox::extractLineBoxFromRenderObject() |
| { |
| blockFlow().complexLineLayout()->lineBoxes().extractLineBox(this); |
| } |
| |
| void RootInlineBox::attachLineBoxToRenderObject() |
| { |
| blockFlow().complexLineLayout()->lineBoxes().attachLineBox(this); |
| } |
| |
| LayoutRect RootInlineBox::paddedLayoutOverflowRect(LayoutUnit endPadding) const |
| { |
| LayoutRect lineLayoutOverflow = layoutOverflowRect(lineTop(), lineBottom()); |
| if (!endPadding) |
| return lineLayoutOverflow; |
| |
| if (isHorizontal()) { |
| if (isLeftToRightDirection()) |
| lineLayoutOverflow.shiftMaxXEdgeTo(std::max(lineLayoutOverflow.maxX(), LayoutUnit(logicalRight() + endPadding))); |
| else |
| lineLayoutOverflow.shiftXEdgeTo(std::min(lineLayoutOverflow.x(), LayoutUnit(logicalLeft() - endPadding))); |
| } else { |
| if (isLeftToRightDirection()) |
| lineLayoutOverflow.shiftMaxYEdgeTo(std::max(lineLayoutOverflow.maxY(), LayoutUnit(logicalRight() + endPadding))); |
| else |
| lineLayoutOverflow.shiftYEdgeTo(std::min(lineLayoutOverflow.y(), LayoutUnit(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 (lineStyle().lineBoxContain().contains(LineBoxContain::Replaced)) { |
| ascent = box.baselinePosition(baselineType()); |
| descent = roundToInt(box.lineHeight()) - ascent; |
| |
| // Replaced elements always affect both the ascent and descent. |
| affectsAscent = true; |
| affectsDescent = true; |
| } |
| return; |
| } |
| |
| Vector<const Font*>* usedFonts = nullptr; |
| GlyphOverflow* glyphOverflow = nullptr; |
| if (is<InlineTextBox>(box)) { |
| GlyphOverflowAndFallbackFontsMap::iterator it = textBoxDataMap.find(&downcast<InlineTextBox>(box)); |
| usedFonts = it == textBoxDataMap.end() ? nullptr : &it->value.first; |
| glyphOverflow = it == textBoxDataMap.end() ? nullptr : &it->value.second; |
| } |
| |
| bool includeLeading = includeLeadingForBox(box); |
| bool includeFont = includeFontForBox(box); |
| |
| bool setUsedFont = false; |
| bool setUsedFontWithLeading = false; |
| |
| const RenderStyle& boxLineStyle = box.lineStyle(); |
| if (usedFonts && !usedFonts->isEmpty() && (includeFont || (boxLineStyle.lineHeight().isNegative() && includeLeading))) { |
| usedFonts->append(&boxLineStyle.fontCascade().primaryFont()); |
| for (auto& font : *usedFonts) { |
| auto& fontMetrics = font->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 = boxLineStyle.fontMetrics().ascent(baselineType()); |
| int fontDescent = boxLineStyle.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 - boxLineStyle.fontMetrics().ascent(baselineType()))); |
| glyphOverflow->bottom = std::min(glyphOverflow->bottom, std::max(0, glyphOverflow->bottom - boxLineStyle.fontMetrics().descent(baselineType()))); |
| } |
| |
| if (includeInitialLetterForBox(box)) { |
| bool canUseGlyphs = glyphOverflow && glyphOverflow->computeBounds; |
| int letterAscent = baselineType() == AlphabeticBaseline ? boxLineStyle.fontMetrics().capHeight() : (canUseGlyphs ? glyphOverflow->top : boxLineStyle.fontMetrics().ascent(baselineType())); |
| int letterDescent = canUseGlyphs ? glyphOverflow->bottom : (box.isRootInlineBox() ? 0 : boxLineStyle.fontMetrics().descent(baselineType())); |
| setAscentAndDescent(ascent, descent, letterAscent, letterDescent, ascentDescentSet); |
| affectsAscent = letterAscent - box.logicalTop() > 0; |
| affectsDescent = letterDescent + box.logicalTop() > 0; |
| if (canUseGlyphs) { |
| glyphOverflow->top = std::min(glyphOverflow->top, std::max(0, glyphOverflow->top - boxLineStyle.fontMetrics().ascent(baselineType()))); |
| glyphOverflow->bottom = std::min(glyphOverflow->bottom, std::max(0, glyphOverflow->bottom - boxLineStyle.fontMetrics().descent(baselineType()))); |
| } |
| } |
| |
| if (includeMarginForBox(box)) { |
| LayoutUnit ascentWithMargin = boxLineStyle.fontMetrics().ascent(baselineType()); |
| LayoutUnit descentWithMargin = boxLineStyle.fontMetrics().descent(baselineType()); |
| if (box.parent() && !box.renderer().isTextOrLineBreak()) { |
| ascentWithMargin += box.boxModelObject()->borderAndPaddingBefore() + box.boxModelObject()->marginBefore(); |
| descentWithMargin += box.boxModelObject()->borderAndPaddingAfter() + 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().isTextOrLineBreak()) |
| return LayoutUnit(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 = isFirstLine(); |
| if (firstLine && !blockFlow().view().usesFirstLineRules()) |
| firstLine = false; |
| |
| // Check the cache. |
| bool isRenderInline = renderer->isRenderInline(); |
| if (isRenderInline && !firstLine) { |
| LayoutUnit cachedPosition; |
| if (verticalPositionCache.get(renderer, baselineType(), cachedPosition)) |
| return cachedPosition; |
| } |
| |
| LayoutUnit verticalPosition; |
| VerticalAlign verticalAlign = renderer->style().verticalAlign(); |
| if (verticalAlign == VerticalAlign::Top || verticalAlign == VerticalAlign::Bottom) |
| return 0; |
| |
| RenderElement* parent = renderer->parent(); |
| if (parent->isRenderInline() && parent->style().verticalAlign() != VerticalAlign::Top && parent->style().verticalAlign() != VerticalAlign::Bottom) |
| verticalPosition = box->parent()->logicalTop(); |
| |
| if (verticalAlign != VerticalAlign::Baseline) { |
| const RenderStyle& parentLineStyle = firstLine ? parent->firstLineStyle() : parent->style(); |
| const FontCascade& font = parentLineStyle.fontCascade(); |
| const FontMetrics& fontMetrics = font.fontMetrics(); |
| int fontSize = font.pixelSize(); |
| |
| LineDirectionMode lineDirection = parent->isHorizontalWritingMode() ? HorizontalLine : VerticalLine; |
| |
| if (verticalAlign == VerticalAlign::Sub) |
| verticalPosition += fontSize / 5 + 1; |
| else if (verticalAlign == VerticalAlign::Super) |
| verticalPosition -= fontSize / 3 + 1; |
| else if (verticalAlign == VerticalAlign::TextTop) |
| verticalPosition += renderer->baselinePosition(baselineType(), firstLine, lineDirection) - fontMetrics.ascent(baselineType()); |
| else if (verticalAlign == VerticalAlign::Middle) |
| verticalPosition = (verticalPosition - LayoutUnit(fontMetrics.xHeight() / 2) - renderer->lineHeight(firstLine, lineDirection) / 2 + renderer->baselinePosition(baselineType(), firstLine, lineDirection)).round(); |
| else if (verticalAlign == VerticalAlign::TextBottom) { |
| 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 == VerticalAlign::BaselineMiddle) |
| verticalPosition += -renderer->lineHeight(firstLine, lineDirection) / 2 + renderer->baselinePosition(baselineType(), firstLine, lineDirection); |
| else if (verticalAlign == 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().isPercentOrCalculated()) |
| 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().isTextOrLineBreak() && !box.behavesLikeText())) |
| return false; |
| |
| auto lineBoxContain = renderer().style().lineBoxContain(); |
| return lineBoxContain.contains(LineBoxContain::Inline) || (&box == this && lineBoxContain.contains(LineBoxContain::Block)); |
| } |
| |
| bool RootInlineBox::includeFontForBox(InlineBox& box) const |
| { |
| if (box.renderer().isReplaced() || (box.renderer().isTextOrLineBreak() && !box.behavesLikeText())) |
| return false; |
| |
| if (!box.behavesLikeText() && is<InlineFlowBox>(box) && !downcast<InlineFlowBox>(box).hasTextChildren()) |
| return false; |
| |
| return renderer().style().lineBoxContain().contains(LineBoxContain::Font); |
| } |
| |
| bool RootInlineBox::includeGlyphsForBox(InlineBox& box) const |
| { |
| if (box.renderer().isReplaced() || (box.renderer().isTextOrLineBreak() && !box.behavesLikeText())) |
| return false; |
| |
| if (!box.behavesLikeText() && is<InlineFlowBox>(box) && !downcast<InlineFlowBox>(box).hasTextChildren()) |
| return false; |
| |
| return renderer().style().lineBoxContain().contains(LineBoxContain::Glyphs); |
| } |
| |
| bool RootInlineBox::includeInitialLetterForBox(InlineBox& box) const |
| { |
| if (box.renderer().isReplaced() || (box.renderer().isTextOrLineBreak() && !box.behavesLikeText())) |
| return false; |
| |
| if (!box.behavesLikeText() && is<InlineFlowBox>(box) && !downcast<InlineFlowBox>(box).hasTextChildren()) |
| return false; |
| |
| return renderer().style().lineBoxContain().contains(LineBoxContain::InitialLetter); |
| } |
| |
| bool RootInlineBox::includeMarginForBox(InlineBox& box) const |
| { |
| if (box.renderer().isReplaced() || (box.renderer().isTextOrLineBreak() && !box.behavesLikeText())) |
| return false; |
| |
| return renderer().style().lineBoxContain().contains(LineBoxContain::InlineBox); |
| } |
| |
| bool RootInlineBox::fitsToGlyphs() const |
| { |
| return renderer().style().lineBoxContain().containsAny({ LineBoxContain::Glyphs, LineBoxContain::InitialLetter }); |
| } |
| |
| bool RootInlineBox::includesRootLineBoxFontOrLeading() const |
| { |
| return renderer().style().lineBoxContain().containsAny({ LineBoxContain::Block, LineBoxContain::Inline, LineBoxContain::Font }); |
| } |
| |
| 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 = nullptr; |
| return nullptr; |
| } |
| |
| 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 = nullptr; |
| return nullptr; |
| } |
| |
| #if ENABLE(TREE_DEBUGGING) |
| const char* RootInlineBox::boxName() const |
| { |
| return "RootInlineBox"; |
| } |
| #endif |
| |
| } // namespace WebCore |
