Delete selection gap code.

third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2085 matching lines @@
 
     m_paintInvalidationLogicalTop = 0;
     m_paintInvalidationLogicalBottom = 0;
 }
 
 void LayoutBlockFlow::paintFloats(const PaintInfo& paintInfo, const LayoutPoint& paintOffset) const
 {
     BlockFlowPainter(*this).paintFloats(paintInfo, paintOffset);
 }
 
-void LayoutBlockFlow::paintSelection(const PaintInfo& paintInfo, const LayoutPoint& paintOffset) const
-{
-    BlockFlowPainter(*this).paintSelection(paintInfo, paintOffset);
-}
-
 void LayoutBlockFlow::clipOutFloatingObjects(const LayoutBlock* rootBlock, ClipScope& clipScope,
     const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock) const
 {
     if (!m_floatingObjects)
         return;
 
     const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set();
     FloatingObjectSetIterator end = floatingObjectSet.end();
     for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) {
         const FloatingObject& floatingObject = *it->get();
@@ skipping 515 matching lines @@
 }
 
 LayoutUnit LayoutBlockFlow::logicalRightFloatOffsetForLine(LayoutUnit logicalTop, LayoutUnit fixedOffset, LayoutUnit logicalHeight) const
 {
     if (m_floatingObjects && m_floatingObjects->hasRightObjects())
         return m_floatingObjects->logicalRightOffset(fixedOffset, logicalTop, logicalHeight);
 
     return fixedOffset;
 }
 
-LayoutRect LayoutBlockFlow::selectionRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer) const
-{
-    LayoutRect rect = selectionGapRectsForPaintInvalidation(paintInvalidationContainer);
-    // FIXME: groupedMapping() leaks the squashing abstraction.
-    if (paintInvalidationContainer->layer()->groupedMapping())
-        PaintLayer::mapRectToPaintBackingCoordinates(paintInvalidationContainer, rect);
-    return rect;
-}
-
-GapRects LayoutBlockFlow::selectionGapRectsForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer) const
-{
-    ASSERT(!needsLayout());
-
-    if (!shouldPaintSelectionGaps())
-        return GapRects();
-
-    TransformState transformState(TransformState::ApplyTransformDirection, FloatPoint());
-    mapLocalToAncestor(paintInvalidationContainer, transformState, ApplyContainerFlip | UseTransforms);
-    LayoutPoint offsetFromPaintInvalidationContainer = roundedLayoutPoint(transformState.mappedPoint());
-
-    if (hasOverflowClip())
-        offsetFromPaintInvalidationContainer -= scrolledContentOffset();
-
-    LayoutUnit lastTop = 0;
-    LayoutUnit lastLeft = logicalLeftSelectionOffset(this, lastTop);
-    LayoutUnit lastRight = logicalRightSelectionOffset(this, lastTop);
-
-    return selectionGaps(this, offsetFromPaintInvalidationContainer, LayoutSize(), lastTop, lastLeft, lastRight);
-}
-
-static void clipOutPositionedObjects(ClipScope& clipScope, const LayoutPoint& offset, TrackedLayoutBoxListHashSet* positionedObjects)
-{
-    if (!positionedObjects)
-        return;
-
-    TrackedLayoutBoxListHashSet::const_iterator end = positionedObjects->end();
-    for (TrackedLayoutBoxListHashSet::const_iterator it = positionedObjects->begin(); it != end; ++it) {
-        LayoutBox* r = *it;
-        clipScope.clip(LayoutRect(flooredIntPoint(r->location() + offset), flooredIntSize(r->size())), SkRegion::kDifference_Op);
-    }
-}
-
-GapRects LayoutBlockFlow::selectionGaps(const LayoutBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition,
-    const LayoutSize& offsetFromRootBlock, LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight,
-    const PaintInfo* paintInfo, ClipScope* clipScope) const
-{
-    // IMPORTANT: Callers of this method that intend for painting to happen need to do a save/restore.
-    if (clipScope) {
-        // Note that we don't clip out overflow for positioned objects.  We just stick to the border box.
-        LayoutRect flippedBlockRect(LayoutPoint(offsetFromRootBlock), size());
-        rootBlock->flipForWritingMode(flippedBlockRect);
-        flippedBlockRect.moveBy(rootBlockPhysicalPosition);
-        clipOutPositionedObjects(*clipScope, flippedBlockRect.location(), positionedObjects());
-        if (isBody() || isDocumentElement()) // The <body> must make sure to examine its containingBlock's positioned objects.
-            for (LayoutBlock* cb = containingBlock(); cb && !cb->isLayoutView(); cb = cb->containingBlock())
-                clipOutPositionedObjects(*clipScope, cb->location(), cb->positionedObjects()); // FIXME: Not right for flipped writing modes.
-        clipOutFloatingObjects(rootBlock, *clipScope, rootBlockPhysicalPosition, offsetFromRootBlock);
-    }
-
-    GapRects result;
-
-    if (hasTransformRelatedProperty() || style()->columnSpan())
-        return result;
-
-    if (childrenInline())
-        result = inlineSelectionGaps(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, lastLogicalTop, lastLogicalLeft, lastLogicalRight, paintInfo);
-    else
-        result = blockSelectionGaps(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, lastLogicalTop, lastLogicalLeft, lastLogicalRight, paintInfo);
-
-    // Go ahead and fill the vertical gap all the way to the bottom of our block if the selection extends past our block.
-    if (rootBlock == this && (selectionState() != SelectionBoth && selectionState() != SelectionEnd)) {
-        result.uniteCenter(blockSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock,
-            lastLogicalTop, lastLogicalLeft, lastLogicalRight, logicalHeight(), paintInfo));
-    }
-    return result;
-}
-
-
-GapRects LayoutBlockFlow::inlineSelectionGaps(const LayoutBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock,
-    LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const PaintInfo* paintInfo) const
-{
-    GapRects result;
-
-    bool containsStart = selectionState() == SelectionStart || selectionState() == SelectionBoth;
-
-    if (!firstLineBox()) {
-        if (containsStart) {
-            // Go ahead and update our lastLogicalTop to be the bottom of the block.  <hr>s or empty blocks with height can trip this
-            // case.
-            lastLogicalTop = rootBlock->blockDirectionOffset(offsetFromRootBlock) + logicalHeight();
-            lastLogicalLeft = logicalLeftSelectionOffset(rootBlock, logicalHeight());
-            lastLogicalRight = logicalRightSelectionOffset(rootBlock, logicalHeight());
-        }
-        return result;
-    }
-
-    RootInlineBox* lastSelectedLine = nullptr;
-    RootInlineBox* curr;
-    for (curr = firstRootBox(); curr && !curr->hasSelectedChildren(); curr = curr->nextRootBox()) { }
-
-    // Now paint the gaps for the lines.
-    for (; curr && curr->hasSelectedChildren(); curr = curr->nextRootBox()) {
-        LayoutUnit selTop =  curr->selectionTopAdjustedForPrecedingBlock();
-        LayoutUnit selHeight = curr->selectionHeightAdjustedForPrecedingBlock();
-
-        if (!containsStart && !lastSelectedLine && selectionState() != SelectionStart && selectionState() != SelectionBoth) {
-            result.uniteCenter(blockSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, lastLogicalTop,
-                lastLogicalLeft, lastLogicalRight, selTop, paintInfo));
-        }
-
-        LayoutRect logicalRect(curr->logicalLeft(), selTop, curr->logicalWidth(), selTop + selHeight);
-        logicalRect.move(isHorizontalWritingMode() ? offsetFromRootBlock : offsetFromRootBlock.transposedSize());
-        LayoutRect physicalRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, logicalRect);
-        if (!paintInfo || paintInfo->cullRect().intersectsCullRect(enclosingIntRect(physicalRect)))
-            result.unite(curr->lineSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, selTop, selHeight, paintInfo));
-
-        lastSelectedLine = curr;
-    }
-
-    if (containsStart && !lastSelectedLine) {
-        // VisibleSelection must start just after our last line.
-        lastSelectedLine = lastRootBox();
-    }
-
-    if (lastSelectedLine && selectionState() != SelectionEnd && selectionState() != SelectionBoth) {
-        // Go ahead and update our lastY to be the bottom of the last selected line.
-        lastLogicalTop = rootBlock->blockDirectionOffset(offsetFromRootBlock) + lastSelectedLine->selectionBottom();
-        lastLogicalLeft = logicalLeftSelectionOffset(rootBlock, lastSelectedLine->selectionBottom());
-        lastLogicalRight = logicalRightSelectionOffset(rootBlock, lastSelectedLine->selectionBottom());
-    }
-    return result;
-}
-
 IntRect alignSelectionRectToDevicePixels(LayoutRect& rect)
 {
     LayoutUnit roundedX = rect.x().round();
     return IntRect(roundedX, rect.y().round(),
         (rect.maxX() - roundedX).round(),
         snapSizeToPixel(rect.height(), rect.y()));
 }
 
-bool LayoutBlockFlow::shouldPaintSelectionGaps() const
-{
-    if (RuntimeEnabledFeatures::selectionPaintingWithoutSelectionGapsEnabled())
-        return false;
-    return selectionState() != SelectionNone && style()->visibility() == VISIBLE && isSelectionRoot();
-}
-
-LayoutRect LayoutBlockFlow::blockSelectionGap(const LayoutBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock,
-    LayoutUnit lastLogicalTop, LayoutUnit lastLogicalLeft, LayoutUnit lastLogicalRight, LayoutUnit logicalBottom, const PaintInfo* paintInfo) const
-{
-    LayoutUnit logicalTop = lastLogicalTop;
-    LayoutUnit logicalHeight = rootBlock->blockDirectionOffset(offsetFromRootBlock) + logicalBottom - logicalTop;
-    if (logicalHeight <= 0)
-        return LayoutRect();
-
-    // Get the selection offsets for the bottom of the gap
-    LayoutUnit logicalLeft = std::max(lastLogicalLeft, logicalLeftSelectionOffset(rootBlock, logicalBottom));
-    LayoutUnit logicalRight = std::min(lastLogicalRight, logicalRightSelectionOffset(rootBlock, logicalBottom));
-    LayoutUnit logicalWidth = logicalRight - logicalLeft;
-    if (logicalWidth <= 0)
-        return LayoutRect();
-
-    LayoutRect gapRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, LayoutRect(logicalLeft, logicalTop, logicalWidth, logicalHeight));
-    if (paintInfo) {
-        IntRect selectionGapRect = alignSelectionRectToDevicePixels(gapRect);
-        paintInfo->context.fillRect(selectionGapRect, selectionBackgroundColor());
-    }
-    return gapRect;
-}
-
-GapRects LayoutBlockFlow::blockSelectionGaps(const LayoutBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock,
-    LayoutUnit& lastLogicalTop, LayoutUnit& lastLogicalLeft, LayoutUnit& lastLogicalRight, const PaintInfo* paintInfo) const
-{
-    GapRects result;
-
-    // Go ahead and jump right to the first block child that contains some selected objects.
-    LayoutBox* curr;
-    for (curr = firstChildBox(); curr && curr->selectionState() == SelectionNone; curr = curr->nextSiblingBox()) { }
-
-    for (bool sawSelectionEnd = false; curr && !sawSelectionEnd; curr = curr->nextSiblingBox()) {
-        SelectionState childState = curr->selectionState();
-        if (childState == SelectionBoth || childState == SelectionEnd)
-            sawSelectionEnd = true;
-
-        if (curr->isFloatingOrOutOfFlowPositioned())
-            continue; // We must be a normal flow object in order to even be considered.
-
-        if (curr->isInFlowPositioned() && curr->hasLayer()) {
-            // If the relposition offset is anything other than 0, then treat this just like an absolute positioned element.
-            // Just disregard it completely.
-            LayoutSize relOffset = curr->layer()->offsetForInFlowPosition();
-            if (relOffset.width() || relOffset.height())
-                continue;
-        }
-
-        bool paintsOwnSelection = curr->shouldPaintSelectionGaps() || curr->isTable(); // FIXME: Eventually we won't special-case table like this.
-        bool fillBlockGaps = paintsOwnSelection || (curr->canBeSelectionLeaf() && childState != SelectionNone);
-        if (fillBlockGaps) {
-            // We need to fill the vertical gap above this object.
-            if (childState == SelectionEnd || childState == SelectionInside) {
-                // Fill the gap above the object.
-                result.uniteCenter(blockSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, lastLogicalTop, lastLogicalLeft, lastLogicalRight,
-                    curr->logicalTop(), paintInfo));
-            }
-
-            // Only fill side gaps for objects that paint their own selection if we know for sure the selection is going to extend all the way *past*
-            // our object.  We know this if the selection did not end inside our object.
-            if (paintsOwnSelection && (childState == SelectionStart || sawSelectionEnd))
-                childState = SelectionNone;
-
-            // Fill side gaps on this object based off its state.
-            bool leftGap, rightGap;
-            getSelectionGapInfo(childState, leftGap, rightGap);
-
-            if (leftGap)
-                result.uniteLeft(logicalLeftSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, LineLayoutItem(const_cast<LayoutBlockFlow*>(this)), curr->logicalLeft(), curr->logicalTop(), curr->logicalHeight(), paintInfo));
-            if (rightGap)
-                result.uniteRight(logicalRightSelectionGap(rootBlock, rootBlockPhysicalPosition, offsetFromRootBlock, LineLayoutItem(const_cast<LayoutBlockFlow*>(this)), curr->logicalRight(), curr->logicalTop(), curr->logicalHeight(), paintInfo));
-
-            // Update lastLogicalTop to be just underneath the object.  lastLogicalLeft and lastLogicalRight extend as far as
-            // they can without bumping into floating or positioned objects.  Ideally they will go right up
-            // to the border of the root selection block.
-            lastLogicalTop = rootBlock->blockDirectionOffset(offsetFromRootBlock) + curr->logicalBottom();
-            lastLogicalLeft = logicalLeftSelectionOffset(rootBlock, curr->logicalBottom());
-            lastLogicalRight = logicalRightSelectionOffset(rootBlock, curr->logicalBottom());
-        } else if (childState != SelectionNone && curr->isLayoutBlockFlow()) {
-            // We must be a block that has some selected object inside it.  Go ahead and recur.
-            result.unite(toLayoutBlockFlow(curr)->selectionGaps(rootBlock, rootBlockPhysicalPosition, LayoutSize(offsetFromRootBlock.width() + curr->location().x(), offsetFromRootBlock.height() + curr->location().y()),
-                lastLogicalTop, lastLogicalLeft, lastLogicalRight, paintInfo));
-        }
-    }
-    return result;
-}
-
-LayoutRect LayoutBlockFlow::logicalLeftSelectionGap(const LayoutBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock,
-    const LineLayoutItem selObj, LayoutUnit logicalLeft, LayoutUnit logicalTop, LayoutUnit logicalHeight, const PaintInfo* paintInfo) const
-{
-    LayoutUnit rootBlockLogicalTop = rootBlock->blockDirectionOffset(offsetFromRootBlock) + logicalTop;
-    LayoutUnit rootBlockLogicalLeft = std::max(logicalLeftSelectionOffset(rootBlock, logicalTop), logicalLeftSelectionOffset(rootBlock, logicalTop + logicalHeight));
-    LayoutUnit rootBlockLogicalRight = std::min(rootBlock->inlineDirectionOffset(offsetFromRootBlock) + logicalLeft, std::min(logicalRightSelectionOffset(rootBlock, logicalTop), logicalRightSelectionOffset(rootBlock, logicalTop + logicalHeight)));
-    LayoutUnit rootBlockLogicalWidth = rootBlockLogicalRight - rootBlockLogicalLeft;
-    if (rootBlockLogicalWidth <= 0)
-        return LayoutRect();
-
-    LayoutRect gapRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, LayoutRect(rootBlockLogicalLeft, rootBlockLogicalTop, rootBlockLogicalWidth, logicalHeight));
-    if (paintInfo) {
-        IntRect selectionGapRect = alignSelectionRectToDevicePixels(gapRect);
-        paintInfo->context.fillRect(selectionGapRect, selObj.selectionBackgroundColor());
-    }
-    return gapRect;
-}
-
-LayoutRect LayoutBlockFlow::logicalRightSelectionGap(const LayoutBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock,
-    const LineLayoutItem selObj, LayoutUnit logicalRight, LayoutUnit logicalTop, LayoutUnit logicalHeight, const PaintInfo* paintInfo) const
-{
-    LayoutUnit rootBlockLogicalTop = rootBlock->blockDirectionOffset(offsetFromRootBlock) + logicalTop;
-    LayoutUnit rootBlockLogicalLeft = std::max(rootBlock->inlineDirectionOffset(offsetFromRootBlock) + logicalRight, max(logicalLeftSelectionOffset(rootBlock, logicalTop), logicalLeftSelectionOffset(rootBlock, logicalTop + logicalHeight)));
-    LayoutUnit rootBlockLogicalRight = std::min(logicalRightSelectionOffset(rootBlock, logicalTop), logicalRightSelectionOffset(rootBlock, logicalTop + logicalHeight));
-    LayoutUnit rootBlockLogicalWidth = rootBlockLogicalRight - rootBlockLogicalLeft;
-    if (rootBlockLogicalWidth <= 0)
-        return LayoutRect();
-
-    LayoutRect gapRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, LayoutRect(rootBlockLogicalLeft, rootBlockLogicalTop, rootBlockLogicalWidth, logicalHeight));
-    if (paintInfo) {
-        IntRect selectionGapRect = alignSelectionRectToDevicePixels(gapRect);
-        paintInfo->context.fillRect(selectionGapRect, selObj.selectionBackgroundColor());
-    }
-    return gapRect;
-}
-
-void LayoutBlockFlow::getSelectionGapInfo(SelectionState state, bool& leftGap, bool& rightGap) const
-{
-    bool ltr = style()->isLeftToRightDirection();
-    leftGap = (state == SelectionInside)
-        || (state == SelectionEnd && ltr)
-        || (state == SelectionStart && !ltr);
-    rightGap = (state == SelectionInside)
-        || (state == SelectionStart && ltr)
-        || (state == SelectionEnd && !ltr);
-}
-
 bool LayoutBlockFlow::allowsPaginationStrut() const
 {
     // The block needs to be contained by a LayoutBlockFlow (and not by e.g. a flexbox, grid, or a
     // table (the latter being the case for table cell or table caption)). The reason for this
     // limitation is simply that LayoutBlockFlow child layout code is the only place where we pick
     // up the struts and handle them. We handle floats and regular in-flow children, and that's
     // all. We could handle this in other layout modes as well (and even for out-of-flow children),
     // but currently we don't.
     // TODO(mstensho): But we *should*.
     if (isOutOfFlowPositioned())
@@ skipping 186 matching lines @@
     FrameView* frameView = document().view();
     LayoutUnit top = (style()->position() == FixedPosition) ? 0 : frameView->scrollOffset().height();
     int visibleHeight = frameView->visibleContentRect(IncludeScrollbars).height();
     if (size().height() < visibleHeight)
         top += (visibleHeight - size().height()) / 2;
     setY(top);
     dialog->setCentered(top);
 }
 
 } // namespace blink