| /* |
| * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * 2. Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
| * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF |
| * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "RenderFragmentedFlow.h" |
| |
| #include "HitTestRequest.h" |
| #include "HitTestResult.h" |
| #include "InlineElementBox.h" |
| #include "Node.h" |
| #include "PODIntervalTree.h" |
| #include "RenderBoxFragmentInfo.h" |
| #include "RenderFragmentContainer.h" |
| #include "RenderInline.h" |
| #include "RenderLayer.h" |
| #include "RenderLayerCompositor.h" |
| #include "RenderLayoutState.h" |
| #include "RenderTableCell.h" |
| #include "RenderTableSection.h" |
| #include "RenderTheme.h" |
| #include "RenderView.h" |
| #include "TransformState.h" |
| #include <wtf/IsoMallocInlines.h> |
| #include <wtf/StackStats.h> |
| |
| namespace WebCore { |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(RenderFragmentedFlow); |
| |
| RenderFragmentedFlow::RenderFragmentedFlow(Document& document, RenderStyle&& style) |
| : RenderBlockFlow(document, WTFMove(style)) |
| , m_currentFragmentMaintainer(nullptr) |
| , m_fragmentsInvalidated(false) |
| , m_fragmentsHaveUniformLogicalWidth(true) |
| , m_fragmentsHaveUniformLogicalHeight(true) |
| , m_pageLogicalSizeChanged(false) |
| { |
| setIsRenderFragmentedFlow(true); |
| } |
| |
| void RenderFragmentedFlow::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) |
| { |
| RenderBlockFlow::styleDidChange(diff, oldStyle); |
| |
| if (oldStyle && oldStyle->writingMode() != style().writingMode()) |
| invalidateFragments(); |
| } |
| |
| void RenderFragmentedFlow::removeFlowChildInfo(RenderElement& child) |
| { |
| if (is<RenderBlockFlow>(child)) |
| removeLineFragmentInfo(downcast<RenderBlockFlow>(child)); |
| if (is<RenderBox>(child)) |
| removeRenderBoxFragmentInfo(downcast<RenderBox>(child)); |
| } |
| |
| void RenderFragmentedFlow::removeFragmentFromThread(RenderFragmentContainer* RenderFragmentContainer) |
| { |
| ASSERT(RenderFragmentContainer); |
| m_fragmentList.remove(RenderFragmentContainer); |
| } |
| |
| void RenderFragmentedFlow::invalidateFragments(MarkingBehavior markingParents) |
| { |
| if (m_fragmentsInvalidated) { |
| ASSERT(selfNeedsLayout()); |
| return; |
| } |
| |
| m_fragmentRangeMap.clear(); |
| m_breakBeforeToFragmentMap.clear(); |
| m_breakAfterToFragmentMap.clear(); |
| if (m_lineToFragmentMap) |
| m_lineToFragmentMap->clear(); |
| setNeedsLayout(markingParents); |
| |
| m_fragmentsInvalidated = true; |
| } |
| |
| void RenderFragmentedFlow::validateFragments() |
| { |
| if (m_fragmentsInvalidated) { |
| m_fragmentsInvalidated = false; |
| m_fragmentsHaveUniformLogicalWidth = true; |
| m_fragmentsHaveUniformLogicalHeight = true; |
| |
| if (hasFragments()) { |
| LayoutUnit previousFragmentLogicalWidth; |
| LayoutUnit previousFragmentLogicalHeight; |
| bool firstFragmentVisited = false; |
| |
| for (auto& fragment : m_fragmentList) { |
| ASSERT(!fragment->needsLayout() || fragment->isRenderFragmentContainerSet()); |
| |
| fragment->deleteAllRenderBoxFragmentInfo(); |
| |
| LayoutUnit fragmentLogicalWidth = fragment->pageLogicalWidth(); |
| LayoutUnit fragmentLogicalHeight = fragment->pageLogicalHeight(); |
| |
| if (!firstFragmentVisited) |
| firstFragmentVisited = true; |
| else { |
| if (m_fragmentsHaveUniformLogicalWidth && previousFragmentLogicalWidth != fragmentLogicalWidth) |
| m_fragmentsHaveUniformLogicalWidth = false; |
| if (m_fragmentsHaveUniformLogicalHeight && previousFragmentLogicalHeight != fragmentLogicalHeight) |
| m_fragmentsHaveUniformLogicalHeight = false; |
| } |
| |
| previousFragmentLogicalWidth = fragmentLogicalWidth; |
| } |
| |
| setFragmentRangeForBox(*this, m_fragmentList.first(), m_fragmentList.last()); |
| } |
| } |
| |
| updateLogicalWidth(); // Called to get the maximum logical width for the fragment. |
| updateFragmentsFragmentedFlowPortionRect(); |
| } |
| |
| void RenderFragmentedFlow::layout() |
| { |
| StackStats::LayoutCheckPoint layoutCheckPoint; |
| |
| m_pageLogicalSizeChanged = m_fragmentsInvalidated && everHadLayout(); |
| |
| validateFragments(); |
| |
| RenderBlockFlow::layout(); |
| |
| m_pageLogicalSizeChanged = false; |
| } |
| |
| void RenderFragmentedFlow::updateLogicalWidth() |
| { |
| LayoutUnit logicalWidth = initialLogicalWidth(); |
| for (auto& fragment : m_fragmentList) { |
| ASSERT(!fragment->needsLayout() || fragment->isRenderFragmentContainerSet()); |
| logicalWidth = std::max(fragment->pageLogicalWidth(), logicalWidth); |
| } |
| setLogicalWidth(logicalWidth); |
| |
| // If the fragments have non-uniform logical widths, then insert inset information for the RenderFragmentedFlow. |
| for (auto& fragment : m_fragmentList) { |
| LayoutUnit fragmentLogicalWidth = fragment->pageLogicalWidth(); |
| LayoutUnit logicalLeft = style().direction() == TextDirection::LTR ? 0_lu : logicalWidth - fragmentLogicalWidth; |
| fragment->setRenderBoxFragmentInfo(this, logicalLeft, fragmentLogicalWidth, false); |
| } |
| } |
| |
| RenderBox::LogicalExtentComputedValues RenderFragmentedFlow::computeLogicalHeight(LayoutUnit, LayoutUnit logicalTop) const |
| { |
| LogicalExtentComputedValues computedValues; |
| computedValues.m_position = logicalTop; |
| computedValues.m_extent = 0; |
| |
| const LayoutUnit maxFlowSize = RenderFragmentedFlow::maxLogicalHeight(); |
| for (auto& fragment : m_fragmentList) { |
| ASSERT(!fragment->needsLayout() || fragment->isRenderFragmentContainerSet()); |
| |
| LayoutUnit distanceToMaxSize = maxFlowSize - computedValues.m_extent; |
| computedValues.m_extent += std::min(distanceToMaxSize, fragment->logicalHeightOfAllFragmentedFlowContent()); |
| |
| // If we reached the maximum size there's no point in going further. |
| if (computedValues.m_extent == maxFlowSize) |
| return computedValues; |
| } |
| return computedValues; |
| } |
| |
| bool RenderFragmentedFlow::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction) |
| { |
| if (hitTestAction == HitTestBlockBackground) |
| return false; |
| return RenderBlockFlow::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, hitTestAction); |
| } |
| |
| bool RenderFragmentedFlow::shouldRepaint(const LayoutRect& r) const |
| { |
| if (view().printing() || r.isEmpty()) |
| return false; |
| |
| return true; |
| } |
| |
| void RenderFragmentedFlow::repaintRectangleInFragments(const LayoutRect& repaintRect) const |
| { |
| if (!shouldRepaint(repaintRect) || !hasValidFragmentInfo()) |
| return; |
| |
| LayoutStateDisabler layoutStateDisabler(view().frameView().layoutContext()); // We can't use layout state to repaint, since the fragments are somewhere else. |
| |
| for (auto& fragment : m_fragmentList) |
| fragment->repaintFragmentedFlowContent(repaintRect); |
| } |
| |
| RenderFragmentContainer* RenderFragmentedFlow::fragmentAtBlockOffset(const RenderBox* clampBox, LayoutUnit offset, bool extendLastFragment) const |
| { |
| ASSERT(!m_fragmentsInvalidated); |
| |
| if (m_fragmentList.isEmpty()) |
| return nullptr; |
| |
| if (m_fragmentList.size() == 1 && extendLastFragment) |
| return m_fragmentList.first(); |
| |
| if (offset <= 0) |
| return clampBox ? clampBox->clampToStartAndEndFragments(m_fragmentList.first()) : m_fragmentList.first(); |
| |
| FragmentSearchAdapter adapter(offset); |
| m_fragmentIntervalTree.allOverlapsWithAdapter<FragmentSearchAdapter>(adapter); |
| |
| // If no fragment was found, the offset is in the flow thread overflow. |
| // The last fragment will contain the offset if extendLastFragment is set or if the last fragment is a set. |
| if (!adapter.result() && (extendLastFragment || m_fragmentList.last()->isRenderFragmentContainerSet())) |
| return clampBox ? clampBox->clampToStartAndEndFragments(m_fragmentList.last()) : m_fragmentList.last(); |
| |
| RenderFragmentContainer* fragment = adapter.result(); |
| if (!clampBox) |
| return fragment; |
| return fragment ? clampBox->clampToStartAndEndFragments(fragment) : nullptr; |
| } |
| |
| LayoutPoint RenderFragmentedFlow::adjustedPositionRelativeToOffsetParent(const RenderBoxModelObject& boxModelObject, const LayoutPoint& startPoint) const |
| { |
| LayoutPoint referencePoint = startPoint; |
| |
| const RenderBlock* objContainingBlock = boxModelObject.containingBlock(); |
| // FIXME: This needs to be adapted for different writing modes inside the flow thread. |
| RenderFragmentContainer* startFragment = fragmentAtBlockOffset(objContainingBlock, referencePoint.y()); |
| if (startFragment) { |
| // Take into account the offset coordinates of the fragment. |
| RenderBoxModelObject* startFragmentBox = startFragment; |
| RenderBoxModelObject* currObject = startFragmentBox; |
| RenderBoxModelObject* currOffsetParent; |
| while ((currOffsetParent = currObject->offsetParent())) { |
| referencePoint.move(currObject->offsetLeft(), currObject->offsetTop()); |
| |
| // Since we're looking for the offset relative to the body, we must also |
| // take into consideration the borders of the fragment's offsetParent. |
| if (is<RenderBox>(*currOffsetParent) && !currOffsetParent->isBody()) |
| referencePoint.move(downcast<RenderBox>(*currOffsetParent).borderLeft(), downcast<RenderBox>(*currOffsetParent).borderTop()); |
| |
| currObject = currOffsetParent; |
| } |
| |
| // We need to check if any of this box's containing blocks start in a different fragment |
| // and if so, drop the object's top position (which was computed relative to its containing block |
| // and is no longer valid) and recompute it using the fragment in which it flows as reference. |
| bool wasComputedRelativeToOtherFragment = false; |
| while (objContainingBlock && !is<RenderView>(*objContainingBlock)) { |
| // Check if this object is in a different fragment. |
| RenderFragmentContainer* parentStartFragment = nullptr; |
| RenderFragmentContainer* parentEndFragment = nullptr; |
| if (getFragmentRangeForBox(objContainingBlock, parentStartFragment, parentEndFragment) && parentStartFragment != startFragment) { |
| wasComputedRelativeToOtherFragment = true; |
| break; |
| } |
| objContainingBlock = objContainingBlock->containingBlock(); |
| } |
| |
| if (wasComputedRelativeToOtherFragment) { |
| if (is<RenderBox>(boxModelObject)) { |
| // Use borderBoxRectInFragment to account for variations such as percentage margins. |
| LayoutRect borderBoxRect = downcast<RenderBox>(boxModelObject).borderBoxRectInFragment(startFragment, RenderBox::DoNotCacheRenderBoxFragmentInfo); |
| referencePoint.move(borderBoxRect.location().x(), 0_lu); |
| } |
| |
| // Get the logical top coordinate of the current object. |
| LayoutUnit top; |
| if (is<RenderBlock>(boxModelObject)) |
| top = downcast<RenderBlock>(boxModelObject).offsetFromLogicalTopOfFirstPage(); |
| else { |
| if (boxModelObject.containingBlock()) |
| top = boxModelObject.containingBlock()->offsetFromLogicalTopOfFirstPage(); |
| |
| if (is<RenderBox>(boxModelObject)) |
| top += downcast<RenderBox>(boxModelObject).topLeftLocation().y(); |
| else if (is<RenderInline>(boxModelObject)) |
| top -= downcast<RenderInline>(boxModelObject).borderTop(); |
| } |
| |
| // Get the logical top of the fragment this object starts in |
| // and compute the object's top, relative to the fragment's top. |
| LayoutUnit fragmentLogicalTop = startFragment->pageLogicalTopForOffset(top); |
| LayoutUnit topRelativeToFragment = top - fragmentLogicalTop; |
| referencePoint.setY(startFragmentBox->offsetTop() + topRelativeToFragment); |
| |
| // Since the top has been overridden, check if the |
| // relative/sticky positioning must be reconsidered. |
| if (boxModelObject.isRelativelyPositioned()) |
| referencePoint.move(0_lu, boxModelObject.relativePositionOffset().height()); |
| else if (boxModelObject.isStickilyPositioned()) |
| referencePoint.move(0_lu, boxModelObject.stickyPositionOffset().height()); |
| } |
| |
| // Since we're looking for the offset relative to the body, we must also |
| // take into consideration the borders of the fragment. |
| referencePoint.move(startFragmentBox->borderLeft(), startFragmentBox->borderTop()); |
| } |
| |
| return referencePoint; |
| } |
| |
| LayoutUnit RenderFragmentedFlow::pageLogicalTopForOffset(LayoutUnit offset) const |
| { |
| RenderFragmentContainer* fragment = fragmentAtBlockOffset(0, offset, false); |
| return fragment ? fragment->pageLogicalTopForOffset(offset) : 0_lu; |
| } |
| |
| LayoutUnit RenderFragmentedFlow::pageLogicalWidthForOffset(LayoutUnit offset) const |
| { |
| RenderFragmentContainer* fragment = fragmentAtBlockOffset(0, offset, true); |
| return fragment ? fragment->pageLogicalWidth() : contentLogicalWidth(); |
| } |
| |
| LayoutUnit RenderFragmentedFlow::pageLogicalHeightForOffset(LayoutUnit offset) const |
| { |
| RenderFragmentContainer* fragment = fragmentAtBlockOffset(0, offset, false); |
| if (!fragment) |
| return 0; |
| |
| return fragment->pageLogicalHeight(); |
| } |
| |
| LayoutUnit RenderFragmentedFlow::pageRemainingLogicalHeightForOffset(LayoutUnit offset, PageBoundaryRule pageBoundaryRule) const |
| { |
| RenderFragmentContainer* fragment = fragmentAtBlockOffset(0, offset, false); |
| if (!fragment) |
| return 0; |
| |
| LayoutUnit pageLogicalTop = fragment->pageLogicalTopForOffset(offset); |
| LayoutUnit pageLogicalHeight = fragment->pageLogicalHeight(); |
| LayoutUnit pageLogicalBottom = pageLogicalTop + pageLogicalHeight; |
| LayoutUnit remainingHeight = pageLogicalBottom - offset; |
| if (pageBoundaryRule == IncludePageBoundary) { |
| // If IncludePageBoundary is set, the line exactly on the top edge of a |
| // fragment will act as being part of the previous fragment. |
| remainingHeight = intMod(remainingHeight, pageLogicalHeight); |
| } |
| return remainingHeight; |
| } |
| |
| RenderFragmentContainer* RenderFragmentedFlow::mapFromFlowToFragment(TransformState& transformState) const |
| { |
| if (!hasValidFragmentInfo()) |
| return nullptr; |
| |
| RenderFragmentContainer* RenderFragmentContainer = currentFragment(); |
| if (!RenderFragmentContainer) { |
| LayoutRect boxRect = transformState.mappedQuad().enclosingBoundingBox(); |
| flipForWritingMode(boxRect); |
| |
| LayoutPoint center = boxRect.center(); |
| RenderFragmentContainer = fragmentAtBlockOffset(this, isHorizontalWritingMode() ? center.y() : center.x(), true); |
| if (!RenderFragmentContainer) |
| return nullptr; |
| } |
| |
| LayoutRect flippedFragmentRect(RenderFragmentContainer->fragmentedFlowPortionRect()); |
| flipForWritingMode(flippedFragmentRect); |
| |
| transformState.move(RenderFragmentContainer->contentBoxRect().location() - flippedFragmentRect.location()); |
| |
| return RenderFragmentContainer; |
| } |
| |
| void RenderFragmentedFlow::removeRenderBoxFragmentInfo(RenderBox& box) |
| { |
| if (!hasFragments()) |
| return; |
| |
| // If the fragment chain was invalidated the next layout will clear the box information from all the fragments. |
| if (m_fragmentsInvalidated) { |
| ASSERT(selfNeedsLayout()); |
| return; |
| } |
| |
| RenderFragmentContainer* startFragment = nullptr; |
| RenderFragmentContainer* endFragment = nullptr; |
| if (getFragmentRangeForBox(&box, startFragment, endFragment)) { |
| for (auto it = m_fragmentList.find(startFragment), end = m_fragmentList.end(); it != end; ++it) { |
| RenderFragmentContainer* fragment = *it; |
| fragment->removeRenderBoxFragmentInfo(box); |
| if (fragment == endFragment) |
| break; |
| } |
| } |
| |
| #ifndef NDEBUG |
| // We have to make sure we did not leave any RenderBoxFragmentInfo attached. |
| for (auto& fragment : m_fragmentList) |
| ASSERT(!fragment->renderBoxFragmentInfo(&box)); |
| #endif |
| |
| m_fragmentRangeMap.remove(&box); |
| } |
| |
| void RenderFragmentedFlow::removeLineFragmentInfo(const RenderBlockFlow& blockFlow) |
| { |
| if (!m_lineToFragmentMap || blockFlow.lineLayoutPath() == SimpleLinesPath) |
| return; |
| |
| for (auto* curr = blockFlow.firstRootBox(); curr; curr = curr->nextRootBox()) |
| m_lineToFragmentMap->remove(curr); |
| |
| ASSERT_WITH_SECURITY_IMPLICATION(checkLinesConsistency(blockFlow)); |
| } |
| |
| void RenderFragmentedFlow::logicalWidthChangedInFragmentsForBlock(const RenderBlock* block, bool& relayoutChildren) |
| { |
| if (!hasValidFragmentInfo()) |
| return; |
| |
| auto it = m_fragmentRangeMap.find(block); |
| if (it == m_fragmentRangeMap.end()) |
| return; |
| |
| RenderFragmentContainerRange& range = it->value; |
| bool rangeInvalidated = range.rangeInvalidated(); |
| range.clearRangeInvalidated(); |
| |
| // If there will be a relayout anyway skip the next steps because they only verify |
| // the state of the ranges. |
| if (relayoutChildren) |
| return; |
| |
| // Not necessary for the flow thread, since we already computed the correct info for it. |
| // If the fragments have changed invalidate the children. |
| if (block == this) { |
| relayoutChildren = m_pageLogicalSizeChanged; |
| return; |
| } |
| |
| RenderFragmentContainer* startFragment = nullptr; |
| RenderFragmentContainer* endFragment = nullptr; |
| if (!getFragmentRangeForBox(block, startFragment, endFragment)) |
| return; |
| |
| for (auto it = m_fragmentList.find(startFragment), end = m_fragmentList.end(); it != end; ++it) { |
| RenderFragmentContainer* fragment = *it; |
| ASSERT(!fragment->needsLayout() || fragment->isRenderFragmentContainerSet()); |
| |
| // We have no information computed for this fragment so we need to do it. |
| std::unique_ptr<RenderBoxFragmentInfo> oldInfo = fragment->takeRenderBoxFragmentInfo(block); |
| if (!oldInfo) { |
| relayoutChildren = rangeInvalidated; |
| return; |
| } |
| |
| LayoutUnit oldLogicalWidth = oldInfo->logicalWidth(); |
| RenderBoxFragmentInfo* newInfo = block->renderBoxFragmentInfo(fragment); |
| if (!newInfo || newInfo->logicalWidth() != oldLogicalWidth) { |
| relayoutChildren = true; |
| return; |
| } |
| |
| if (fragment == endFragment) |
| break; |
| } |
| } |
| |
| LayoutUnit RenderFragmentedFlow::contentLogicalWidthOfFirstFragment() const |
| { |
| RenderFragmentContainer* firstValidFragmentInFlow = firstFragment(); |
| if (!firstValidFragmentInFlow) |
| return 0; |
| return isHorizontalWritingMode() ? firstValidFragmentInFlow->contentWidth() : firstValidFragmentInFlow->contentHeight(); |
| } |
| |
| LayoutUnit RenderFragmentedFlow::contentLogicalHeightOfFirstFragment() const |
| { |
| RenderFragmentContainer* firstValidFragmentInFlow = firstFragment(); |
| if (!firstValidFragmentInFlow) |
| return 0; |
| return isHorizontalWritingMode() ? firstValidFragmentInFlow->contentHeight() : firstValidFragmentInFlow->contentWidth(); |
| } |
| |
| LayoutUnit RenderFragmentedFlow::contentLogicalLeftOfFirstFragment() const |
| { |
| RenderFragmentContainer* firstValidFragmentInFlow = firstFragment(); |
| if (!firstValidFragmentInFlow) |
| return 0; |
| return isHorizontalWritingMode() ? firstValidFragmentInFlow->fragmentedFlowPortionRect().x() : firstValidFragmentInFlow->fragmentedFlowPortionRect().y(); |
| } |
| |
| RenderFragmentContainer* RenderFragmentedFlow::firstFragment() const |
| { |
| if (!hasFragments()) |
| return nullptr; |
| return m_fragmentList.first(); |
| } |
| |
| RenderFragmentContainer* RenderFragmentedFlow::lastFragment() const |
| { |
| if (!hasFragments()) |
| return nullptr; |
| return m_fragmentList.last(); |
| } |
| |
| void RenderFragmentedFlow::clearRenderBoxFragmentInfoAndCustomStyle(const RenderBox& box, |
| const RenderFragmentContainer* newStartFragment, const RenderFragmentContainer* newEndFragment, |
| const RenderFragmentContainer* oldStartFragment, const RenderFragmentContainer* oldEndFragment) |
| { |
| ASSERT(newStartFragment && newEndFragment && oldStartFragment && oldEndFragment); |
| |
| bool insideOldFragmentRange = false; |
| bool insideNewFragmentRange = false; |
| for (auto& fragment : m_fragmentList) { |
| if (oldStartFragment == fragment) |
| insideOldFragmentRange = true; |
| if (newStartFragment == fragment) |
| insideNewFragmentRange = true; |
| |
| if (!(insideOldFragmentRange && insideNewFragmentRange)) { |
| if (fragment->renderBoxFragmentInfo(&box)) |
| fragment->removeRenderBoxFragmentInfo(box); |
| } |
| |
| if (oldEndFragment == fragment) |
| insideOldFragmentRange = false; |
| if (newEndFragment == fragment) |
| insideNewFragmentRange = false; |
| } |
| } |
| |
| void RenderFragmentedFlow::setFragmentRangeForBox(const RenderBox& box, RenderFragmentContainer* startFragment, RenderFragmentContainer* endFragment) |
| { |
| ASSERT(hasFragments()); |
| ASSERT(startFragment && endFragment && startFragment->fragmentedFlow() == this && endFragment->fragmentedFlow() == this); |
| auto result = m_fragmentRangeMap.set(&box, RenderFragmentContainerRange(startFragment, endFragment)); |
| if (result.isNewEntry) |
| return; |
| |
| // If nothing changed, just bail. |
| auto& range = result.iterator->value; |
| if (range.startFragment() == startFragment && range.endFragment() == endFragment) |
| return; |
| clearRenderBoxFragmentInfoAndCustomStyle(box, startFragment, endFragment, range.startFragment(), range.endFragment()); |
| } |
| |
| bool RenderFragmentedFlow::hasCachedFragmentRangeForBox(const RenderBox& box) const |
| { |
| return m_fragmentRangeMap.contains(&box); |
| } |
| |
| bool RenderFragmentedFlow::getFragmentRangeForBoxFromCachedInfo(const RenderBox* box, RenderFragmentContainer*& startFragment, RenderFragmentContainer*& endFragment) const |
| { |
| ASSERT(box); |
| ASSERT(hasValidFragmentInfo()); |
| ASSERT((startFragment == nullptr) && (endFragment == nullptr)); |
| |
| auto it = m_fragmentRangeMap.find(box); |
| if (it != m_fragmentRangeMap.end()) { |
| const RenderFragmentContainerRange& range = it->value; |
| startFragment = range.startFragment(); |
| endFragment = range.endFragment(); |
| ASSERT(m_fragmentList.contains(startFragment) && m_fragmentList.contains(endFragment)); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool RenderFragmentedFlow::getFragmentRangeForBox(const RenderBox* box, RenderFragmentContainer*& startFragment, RenderFragmentContainer*& endFragment) const |
| { |
| ASSERT(box); |
| |
| startFragment = endFragment = nullptr; |
| if (!hasValidFragmentInfo()) // We clear the ranges when we invalidate the fragments. |
| return false; |
| |
| if (m_fragmentList.size() == 1) { |
| startFragment = endFragment = m_fragmentList.first(); |
| return true; |
| } |
| |
| if (getFragmentRangeForBoxFromCachedInfo(box, startFragment, endFragment)) |
| return true; |
| |
| return false; |
| } |
| |
| bool RenderFragmentedFlow::computedFragmentRangeForBox(const RenderBox* box, RenderFragmentContainer*& startFragment, RenderFragmentContainer*& endFragment) const |
| { |
| ASSERT(box); |
| |
| startFragment = endFragment = nullptr; |
| if (!hasValidFragmentInfo()) // We clear the ranges when we invalidate the fragments. |
| return false; |
| |
| if (getFragmentRangeForBox(box, startFragment, endFragment)) |
| return true; |
| |
| // Search the fragment range using the information provided by the containing block chain. |
| auto* containingBlock = const_cast<RenderBox*>(box); |
| while (!containingBlock->isRenderFragmentedFlow()) { |
| InlineElementBox* boxWrapper = containingBlock->inlineBoxWrapper(); |
| if (boxWrapper && boxWrapper->root().containingFragment()) { |
| startFragment = endFragment = boxWrapper->root().containingFragment(); |
| ASSERT(m_fragmentList.contains(startFragment)); |
| return true; |
| } |
| |
| // FIXME: Use the containingBlock() value once we patch all the layout systems to be fragment range aware |
| // (e.g. if we use containingBlock() the shadow controls of a video element won't get the range from the |
| // video box because it's not a block; they need to be patched separately). |
| ASSERT(containingBlock->parent()); |
| containingBlock = &containingBlock->parent()->enclosingBox(); |
| ASSERT(containingBlock); |
| |
| // If a box doesn't have a cached fragment range it usually means the box belongs to a line so startFragment should be equal with endFragment. |
| // FIXME: Find the cases when this startFragment should not be equal with endFragment and make sure these boxes have cached fragment ranges. |
| if (containingBlock && hasCachedFragmentRangeForBox(*containingBlock)) { |
| startFragment = endFragment = fragmentAtBlockOffset(containingBlock, containingBlock->offsetFromLogicalTopOfFirstPage(), true); |
| return true; |
| } |
| } |
| ASSERT_NOT_REACHED(); |
| return false; |
| } |
| |
| bool RenderFragmentedFlow::fragmentInRange(const RenderFragmentContainer* targetFragment, const RenderFragmentContainer* startFragment, const RenderFragmentContainer* endFragment) const |
| { |
| ASSERT(targetFragment); |
| |
| for (auto it = m_fragmentList.find(const_cast<RenderFragmentContainer*>(startFragment)), end = m_fragmentList.end(); it != end; ++it) { |
| const RenderFragmentContainer* currFragment = *it; |
| if (targetFragment == currFragment) |
| return true; |
| if (currFragment == endFragment) |
| break; |
| } |
| |
| return false; |
| } |
| |
| bool RenderFragmentedFlow::objectShouldFragmentInFlowFragment(const RenderObject* object, const RenderFragmentContainer* fragment) const |
| { |
| ASSERT(object); |
| ASSERT(fragment); |
| |
| RenderFragmentedFlow* fragmentedFlow = object->enclosingFragmentedFlow(); |
| if (fragmentedFlow != this) |
| return false; |
| |
| if (!m_fragmentList.contains(const_cast<RenderFragmentContainer*>(fragment))) |
| return false; |
| |
| RenderFragmentContainer* enclosingBoxStartFragment = nullptr; |
| RenderFragmentContainer* enclosingBoxEndFragment = nullptr; |
| // If the box has no range, do not check fragmentInRange. Boxes inside inlines do not get ranges. |
| // Instead, the containing RootInlineBox will abort when trying to paint inside the wrong fragment. |
| if (computedFragmentRangeForBox(&object->enclosingBox(), enclosingBoxStartFragment, enclosingBoxEndFragment) |
| && !fragmentInRange(fragment, enclosingBoxStartFragment, enclosingBoxEndFragment)) |
| return false; |
| |
| return object->isBox() || object->isRenderInline(); |
| } |
| |
| bool RenderFragmentedFlow::objectInFlowFragment(const RenderObject* object, const RenderFragmentContainer* fragment) const |
| { |
| ASSERT(object); |
| ASSERT(fragment); |
| |
| RenderFragmentedFlow* fragmentedFlow = object->enclosingFragmentedFlow(); |
| if (fragmentedFlow != this) |
| return false; |
| |
| if (!m_fragmentList.contains(const_cast<RenderFragmentContainer*>(fragment))) |
| return false; |
| |
| RenderFragmentContainer* enclosingBoxStartFragment = nullptr; |
| RenderFragmentContainer* enclosingBoxEndFragment = nullptr; |
| if (!getFragmentRangeForBox(&object->enclosingBox(), enclosingBoxStartFragment, enclosingBoxEndFragment)) |
| return false; |
| |
| if (!fragmentInRange(fragment, enclosingBoxStartFragment, enclosingBoxEndFragment)) |
| return false; |
| |
| if (object->isBox()) |
| return true; |
| |
| LayoutRect objectABBRect = object->absoluteBoundingBoxRect(true); |
| if (!objectABBRect.width()) |
| objectABBRect.setWidth(1); |
| if (!objectABBRect.height()) |
| objectABBRect.setHeight(1); |
| if (objectABBRect.intersects(fragment->absoluteBoundingBoxRect(true))) |
| return true; |
| |
| if (fragment == lastFragment()) { |
| // If the object does not intersect any of the enclosing box fragments |
| // then the object is in last fragment. |
| for (auto it = m_fragmentList.find(enclosingBoxStartFragment), end = m_fragmentList.end(); it != end; ++it) { |
| const RenderFragmentContainer* currFragment = *it; |
| if (currFragment == fragment) |
| break; |
| if (objectABBRect.intersects(currFragment->absoluteBoundingBoxRect(true))) |
| return false; |
| } |
| return true; |
| } |
| |
| return false; |
| } |
| |
| #if !ASSERT_WITH_SECURITY_IMPLICATION_DISABLED |
| bool RenderFragmentedFlow::checkLinesConsistency(const RenderBlockFlow& removedBlock) const |
| { |
| if (!m_lineToFragmentMap) |
| return true; |
| |
| for (auto& linePair : *m_lineToFragmentMap.get()) { |
| const RootInlineBox* line = linePair.key; |
| RenderFragmentContainer* fragment = linePair.value; |
| if (&line->blockFlow() == &removedBlock) |
| return false; |
| if (line->blockFlow().fragmentedFlowState() == NotInsideFragmentedFlow) |
| return false; |
| if (!m_fragmentList.contains(fragment)) |
| return false; |
| } |
| |
| return true; |
| } |
| #endif |
| |
| void RenderFragmentedFlow::clearLinesToFragmentMap() |
| { |
| if (m_lineToFragmentMap) |
| m_lineToFragmentMap->clear(); |
| } |
| |
| void RenderFragmentedFlow::deleteLines() |
| { |
| clearLinesToFragmentMap(); |
| RenderBlockFlow::deleteLines(); |
| } |
| |
| void RenderFragmentedFlow::willBeDestroyed() |
| { |
| clearLinesToFragmentMap(); |
| RenderBlockFlow::willBeDestroyed(); |
| } |
| |
| void RenderFragmentedFlow::markFragmentsForOverflowLayoutIfNeeded() |
| { |
| if (!hasFragments()) |
| return; |
| |
| for (auto& fragment : m_fragmentList) |
| fragment->setNeedsSimplifiedNormalFlowLayout(); |
| } |
| |
| void RenderFragmentedFlow::updateFragmentsFragmentedFlowPortionRect() |
| { |
| LayoutUnit logicalHeight; |
| // FIXME: Optimize not to clear the interval all the time. This implies manually managing the tree nodes lifecycle. |
| m_fragmentIntervalTree.clear(); |
| for (auto& fragment : m_fragmentList) { |
| LayoutUnit fragmentLogicalWidth = fragment->pageLogicalWidth(); |
| LayoutUnit fragmentLogicalHeight = std::min<LayoutUnit>(RenderFragmentedFlow::maxLogicalHeight() - logicalHeight, fragment->logicalHeightOfAllFragmentedFlowContent()); |
| |
| LayoutRect fragmentRect(style().direction() == TextDirection::LTR ? 0_lu : logicalWidth() - fragmentLogicalWidth, logicalHeight, fragmentLogicalWidth, fragmentLogicalHeight); |
| |
| fragment->setFragmentedFlowPortionRect(isHorizontalWritingMode() ? fragmentRect : fragmentRect.transposedRect()); |
| |
| m_fragmentIntervalTree.add(FragmentIntervalTree::createInterval(logicalHeight, logicalHeight + fragmentLogicalHeight, makeWeakPtr(fragment))); |
| |
| logicalHeight += fragmentLogicalHeight; |
| } |
| } |
| |
| // Even if we require the break to occur at offsetBreakInFragmentedFlow, because fragments may have min/max-height values, |
| // it is possible that the break will occur at a different offset than the original one required. |
| // offsetBreakAdjustment measures the different between the requested break offset and the current break offset. |
| bool RenderFragmentedFlow::addForcedFragmentBreak(const RenderBlock* block, LayoutUnit offsetBreakInFragmentedFlow, RenderBox*, bool, LayoutUnit* offsetBreakAdjustment) |
| { |
| // We need to update the fragments flow thread portion rect because we are going to process |
| // a break on these fragments. |
| updateFragmentsFragmentedFlowPortionRect(); |
| |
| // Simulate a fragment break at offsetBreakInFragmentedFlow. If it points inside an auto logical height fragment, |
| // then it determines the fragment computed auto height. |
| RenderFragmentContainer* fragment = fragmentAtBlockOffset(block, offsetBreakInFragmentedFlow); |
| if (!fragment) |
| return false; |
| |
| LayoutUnit currentFragmentOffsetInFragmentedFlow = isHorizontalWritingMode() ? fragment->fragmentedFlowPortionRect().y() : fragment->fragmentedFlowPortionRect().x(); |
| |
| currentFragmentOffsetInFragmentedFlow += isHorizontalWritingMode() ? fragment->fragmentedFlowPortionRect().height() : fragment->fragmentedFlowPortionRect().width(); |
| |
| if (offsetBreakAdjustment) |
| *offsetBreakAdjustment = std::max<LayoutUnit>(0, currentFragmentOffsetInFragmentedFlow - offsetBreakInFragmentedFlow); |
| |
| return false; |
| } |
| |
| void RenderFragmentedFlow::collectLayerFragments(LayerFragments& layerFragments, const LayoutRect& layerBoundingBox, const LayoutRect& dirtyRect) |
| { |
| ASSERT(!m_fragmentsInvalidated); |
| |
| for (auto& fragment : m_fragmentList) |
| fragment->collectLayerFragments(layerFragments, layerBoundingBox, dirtyRect); |
| } |
| |
| LayoutRect RenderFragmentedFlow::fragmentsBoundingBox(const LayoutRect& layerBoundingBox) |
| { |
| ASSERT(!m_fragmentsInvalidated); |
| |
| LayoutRect result; |
| for (auto& fragment : m_fragmentList) { |
| LayerFragments fragments; |
| fragment->collectLayerFragments(fragments, layerBoundingBox, LayoutRect::infiniteRect()); |
| for (const auto& fragment : fragments) { |
| LayoutRect fragmentRect(layerBoundingBox); |
| fragmentRect.intersect(fragment.paginationClip); |
| fragmentRect.move(fragment.paginationOffset); |
| result.unite(fragmentRect); |
| } |
| } |
| |
| return result; |
| } |
| |
| LayoutUnit RenderFragmentedFlow::offsetFromLogicalTopOfFirstFragment(const RenderBlock* currentBlock) const |
| { |
| // As a last resort, take the slow path. |
| LayoutRect blockRect(0_lu, 0_lu, currentBlock->width(), currentBlock->height()); |
| while (currentBlock && !is<RenderView>(*currentBlock) && !currentBlock->isRenderFragmentedFlow()) { |
| RenderBlock* containerBlock = currentBlock->containingBlock(); |
| ASSERT(containerBlock); |
| if (!containerBlock) |
| return 0; |
| LayoutPoint currentBlockLocation = currentBlock->location(); |
| if (is<RenderTableCell>(*currentBlock)) { |
| if (auto* section = downcast<RenderTableCell>(*currentBlock).section()) |
| currentBlockLocation.moveBy(section->location()); |
| } |
| |
| if (containerBlock->style().writingMode() != currentBlock->style().writingMode()) { |
| // We have to put the block rect in container coordinates |
| // and we have to take into account both the container and current block flipping modes |
| if (containerBlock->style().isFlippedBlocksWritingMode()) { |
| if (containerBlock->isHorizontalWritingMode()) |
| blockRect.setY(currentBlock->height() - blockRect.maxY()); |
| else |
| blockRect.setX(currentBlock->width() - blockRect.maxX()); |
| } |
| currentBlock->flipForWritingMode(blockRect); |
| } |
| blockRect.moveBy(currentBlockLocation); |
| currentBlock = containerBlock; |
| } |
| |
| return currentBlock->isHorizontalWritingMode() ? blockRect.y() : blockRect.x(); |
| } |
| |
| void RenderFragmentedFlow::FragmentSearchAdapter::collectIfNeeded(const FragmentInterval& interval) |
| { |
| if (m_result) |
| return; |
| if (interval.low() <= m_offset && interval.high() > m_offset) |
| m_result = interval.data(); |
| } |
| |
| void RenderFragmentedFlow::mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState& transformState, MapCoordinatesFlags mode, bool* wasFixed) const |
| { |
| if (this == repaintContainer) |
| return; |
| |
| if (RenderFragmentContainer* fragment = mapFromFlowToFragment(transformState)) { |
| // FIXME: The cast below is probably not the best solution, we may need to find a better way. |
| const RenderObject* fragmentObject = static_cast<const RenderObject*>(fragment); |
| |
| // If the repaint container is nullptr, we have to climb up to the RenderView, otherwise swap |
| // it with the fragment's repaint container. |
| repaintContainer = repaintContainer ? fragment->containerForRepaint() : nullptr; |
| |
| if (RenderFragmentedFlow* fragmentFragmentedFlow = fragment->enclosingFragmentedFlow()) { |
| RenderFragmentContainer* startFragment = nullptr; |
| RenderFragmentContainer* endFragment = nullptr; |
| if (fragmentFragmentedFlow->getFragmentRangeForBox(fragment, startFragment, endFragment)) { |
| CurrentRenderFragmentContainerMaintainer fragmentMaintainer(*startFragment); |
| fragmentObject->mapLocalToContainer(repaintContainer, transformState, mode, wasFixed); |
| return; |
| } |
| } |
| |
| fragmentObject->mapLocalToContainer(repaintContainer, transformState, mode, wasFixed); |
| } |
| } |
| |
| // FIXME: Make this function faster. Walking the render tree is slow, better use a caching mechanism (e.g. |cachedOffsetFromLogicalTopOfFirstFragment|). |
| LayoutRect RenderFragmentedFlow::mapFromLocalToFragmentedFlow(const RenderBox* box, const LayoutRect& localRect) const |
| { |
| LayoutRect boxRect = localRect; |
| |
| while (box && box != this) { |
| RenderBlock* containerBlock = box->containingBlock(); |
| ASSERT(containerBlock); |
| if (!containerBlock) |
| return LayoutRect(); |
| LayoutPoint currentBoxLocation = box->location(); |
| |
| if (containerBlock->style().writingMode() != box->style().writingMode()) |
| box->flipForWritingMode(boxRect); |
| |
| boxRect.moveBy(currentBoxLocation); |
| box = containerBlock; |
| } |
| |
| return boxRect; |
| } |
| |
| // FIXME: Make this function faster. Walking the render tree is slow, better use a caching mechanism (e.g. |cachedOffsetFromLogicalTopOfFirstFragment|). |
| LayoutRect RenderFragmentedFlow::mapFromFragmentedFlowToLocal(const RenderBox* box, const LayoutRect& rect) const |
| { |
| LayoutRect localRect = rect; |
| if (box == this) |
| return localRect; |
| |
| RenderBlock* containerBlock = box->containingBlock(); |
| ASSERT(containerBlock); |
| if (!containerBlock) |
| return LayoutRect(); |
| localRect = mapFromFragmentedFlowToLocal(containerBlock, localRect); |
| |
| LayoutPoint currentBoxLocation = box->location(); |
| localRect.moveBy(-currentBoxLocation); |
| |
| if (containerBlock->style().writingMode() != box->style().writingMode()) |
| box->flipForWritingMode(localRect); |
| |
| return localRect; |
| } |
| |
| void RenderFragmentedFlow::flipForWritingModeLocalCoordinates(LayoutRect& rect) const |
| { |
| if (!style().isFlippedBlocksWritingMode()) |
| return; |
| |
| if (isHorizontalWritingMode()) |
| rect.setY(0 - rect.maxY()); |
| else |
| rect.setX(0 - rect.maxX()); |
| } |
| |
| void RenderFragmentedFlow::addFragmentsVisualEffectOverflow(const RenderBox* box) |
| { |
| RenderFragmentContainer* startFragment = nullptr; |
| RenderFragmentContainer* endFragment = nullptr; |
| if (!getFragmentRangeForBox(box, startFragment, endFragment)) |
| return; |
| |
| for (auto iter = m_fragmentList.find(startFragment), end = m_fragmentList.end(); iter != end; ++iter) { |
| RenderFragmentContainer* fragment = *iter; |
| |
| LayoutRect borderBox = box->borderBoxRectInFragment(fragment); |
| borderBox = box->applyVisualEffectOverflow(borderBox); |
| borderBox = fragment->rectFlowPortionForBox(box, borderBox); |
| |
| fragment->addVisualOverflowForBox(box, borderBox); |
| if (fragment == endFragment) |
| break; |
| } |
| } |
| |
| void RenderFragmentedFlow::addFragmentsVisualOverflowFromTheme(const RenderBlock* block) |
| { |
| RenderFragmentContainer* startFragment = nullptr; |
| RenderFragmentContainer* endFragment = nullptr; |
| if (!getFragmentRangeForBox(block, startFragment, endFragment)) |
| return; |
| |
| for (auto iter = m_fragmentList.find(startFragment), end = m_fragmentList.end(); iter != end; ++iter) { |
| RenderFragmentContainer* fragment = *iter; |
| |
| LayoutRect borderBox = block->borderBoxRectInFragment(fragment); |
| borderBox = fragment->rectFlowPortionForBox(block, borderBox); |
| |
| FloatRect inflatedRect = borderBox; |
| block->theme().adjustRepaintRect(*block, inflatedRect); |
| |
| fragment->addVisualOverflowForBox(block, snappedIntRect(LayoutRect(inflatedRect))); |
| if (fragment == endFragment) |
| break; |
| } |
| } |
| |
| void RenderFragmentedFlow::addFragmentsOverflowFromChild(const RenderBox* box, const RenderBox* child, const LayoutSize& delta) |
| { |
| RenderFragmentContainer* startFragment = nullptr; |
| RenderFragmentContainer* endFragment = nullptr; |
| if (!getFragmentRangeForBox(child, startFragment, endFragment)) |
| return; |
| |
| RenderFragmentContainer* containerStartFragment = nullptr; |
| RenderFragmentContainer* containerEndFragment = nullptr; |
| if (!getFragmentRangeForBox(box, containerStartFragment, containerEndFragment)) |
| return; |
| |
| for (auto iter = m_fragmentList.find(startFragment), end = m_fragmentList.end(); iter != end; ++iter) { |
| RenderFragmentContainer* fragment = *iter; |
| if (!fragmentInRange(fragment, containerStartFragment, containerEndFragment)) { |
| if (fragment == endFragment) |
| break; |
| continue; |
| } |
| |
| LayoutRect childLayoutOverflowRect = fragment->layoutOverflowRectForBoxForPropagation(child); |
| childLayoutOverflowRect.move(delta); |
| |
| fragment->addLayoutOverflowForBox(box, childLayoutOverflowRect); |
| |
| if (child->hasSelfPaintingLayer() || box->hasOverflowClip()) { |
| if (fragment == endFragment) |
| break; |
| continue; |
| } |
| LayoutRect childVisualOverflowRect = fragment->visualOverflowRectForBoxForPropagation(*child); |
| childVisualOverflowRect.move(delta); |
| fragment->addVisualOverflowForBox(box, childVisualOverflowRect); |
| |
| if (fragment == endFragment) |
| break; |
| } |
| } |
| |
| void RenderFragmentedFlow::addFragmentsLayoutOverflow(const RenderBox* box, const LayoutRect& layoutOverflow) |
| { |
| RenderFragmentContainer* startFragment = nullptr; |
| RenderFragmentContainer* endFragment = nullptr; |
| if (!getFragmentRangeForBox(box, startFragment, endFragment)) |
| return; |
| |
| for (auto iter = m_fragmentList.find(startFragment), end = m_fragmentList.end(); iter != end; ++iter) { |
| RenderFragmentContainer* fragment = *iter; |
| LayoutRect layoutOverflowInFragment = fragment->rectFlowPortionForBox(box, layoutOverflow); |
| |
| fragment->addLayoutOverflowForBox(box, layoutOverflowInFragment); |
| |
| if (fragment == endFragment) |
| break; |
| } |
| } |
| |
| void RenderFragmentedFlow::addFragmentsVisualOverflow(const RenderBox* box, const LayoutRect& visualOverflow) |
| { |
| RenderFragmentContainer* startFragment = nullptr; |
| RenderFragmentContainer* endFragment = nullptr; |
| if (!getFragmentRangeForBox(box, startFragment, endFragment)) |
| return; |
| |
| for (RenderFragmentContainerList::iterator iter = m_fragmentList.find(startFragment); iter != m_fragmentList.end(); ++iter) { |
| RenderFragmentContainer* fragment = *iter; |
| LayoutRect visualOverflowInFragment = fragment->rectFlowPortionForBox(box, visualOverflow); |
| |
| fragment->addVisualOverflowForBox(box, visualOverflowInFragment); |
| |
| if (fragment == endFragment) |
| break; |
| } |
| } |
| |
| void RenderFragmentedFlow::clearFragmentsOverflow(const RenderBox* box) |
| { |
| RenderFragmentContainer* startFragment = nullptr; |
| RenderFragmentContainer* endFragment = nullptr; |
| if (!getFragmentRangeForBox(box, startFragment, endFragment)) |
| return; |
| |
| for (auto iter = m_fragmentList.find(startFragment), end = m_fragmentList.end(); iter != end; ++iter) { |
| RenderFragmentContainer* fragment = *iter; |
| RenderBoxFragmentInfo* boxInfo = fragment->renderBoxFragmentInfo(box); |
| if (boxInfo && boxInfo->overflow()) |
| boxInfo->clearOverflow(); |
| |
| if (fragment == endFragment) |
| break; |
| } |
| } |
| |
| RenderFragmentContainer* RenderFragmentedFlow::currentFragment() const |
| { |
| return m_currentFragmentMaintainer ? &m_currentFragmentMaintainer->fragment() : nullptr; |
| } |
| |
| ContainingFragmentMap& RenderFragmentedFlow::containingFragmentMap() |
| { |
| if (!m_lineToFragmentMap) |
| m_lineToFragmentMap = makeUnique<ContainingFragmentMap>(); |
| |
| return *m_lineToFragmentMap.get(); |
| } |
| |
| |
| } // namespace WebCore |
