| /* |
| * Copyright (C) 2018 Apple 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: |
| * 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 APPLE INC. AND ITS CONTRIBUTORS ``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 APPLE INC. OR ITS CONTRIBUTORS |
| * 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 "BlockInvalidation.h" |
| |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| |
| #include "BlockFormattingState.h" |
| #include "Invalidation.h" |
| #include "LayoutBox.h" |
| #include "LayoutContainer.h" |
| #include <wtf/IsoMallocInlines.h> |
| |
| namespace WebCore { |
| namespace Layout { |
| |
| WTF_MAKE_ISO_ALLOCATED_IMPL(BlockInvalidation); |
| |
| static bool invalidationStopsAtFormattingContextBoundary(const Container& formattingContextRoot, const Box&, StyleDiff) |
| { |
| UNUSED_PARAM(formattingContextRoot); |
| |
| ASSERT(formattingContextRoot.establishesFormattingContext()); |
| return true; |
| } |
| |
| static OptionSet<LayoutContext::UpdateType> computeUpdateType(const Box&, StyleDiff, BlockFormattingState&) |
| { |
| return LayoutContext::updateAll(); |
| } |
| |
| static OptionSet<LayoutContext::UpdateType> computeUpdateTypeForAncestor(const Container&, StyleDiff, BlockFormattingState&) |
| { |
| return LayoutContext::updateAll(); |
| } |
| |
| InvalidationResult BlockInvalidation::invalidate(const Box& layoutBox, StyleDiff styleDiff, LayoutContext& layoutContext, BlockFormattingState& formattingState) |
| { |
| // Invalidate this box and the containing block chain all the way up to the formatting context root (and beyond if needed). |
| layoutContext.markNeedsUpdate(layoutBox, computeUpdateType(layoutBox, styleDiff, formattingState)); |
| for (auto* containingBlock = layoutBox.containingBlock(); containingBlock; containingBlock = containingBlock->containingBlock()) { |
| if (containingBlock->establishesFormattingContext() && invalidationStopsAtFormattingContextBoundary(*containingBlock, layoutBox, styleDiff)) |
| return { containingBlock }; |
| layoutContext.markNeedsUpdate(*containingBlock, computeUpdateTypeForAncestor(*containingBlock, styleDiff, formattingState)); |
| } |
| // Invalidation always stops at the initial containing block. |
| ASSERT_NOT_REACHED(); |
| return { nullptr }; |
| } |
| |
| } |
| } |
| #endif |