1/*
2 * Copyright (C) 2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "BlockInvalidation.h"
28
29#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
30
31#include "BlockFormattingState.h"
32#include "Invalidation.h"
33#include "LayoutBox.h"
34#include "LayoutContainer.h"
35#include "LayoutState.h"
36#include <wtf/IsoMallocInlines.h>
37
38namespace WebCore {
39namespace Layout {
40
41WTF_MAKE_ISO_ALLOCATED_IMPL(BlockInvalidation);
42
43static bool invalidationStopsAtFormattingContextBoundary(const Container& formattingContextRoot, const Box&, StyleDiff)
44{
45 UNUSED_PARAM(formattingContextRoot);
46
47 ASSERT(formattingContextRoot.establishesFormattingContext());
48 return true;
49}
50
51static LayoutState::UpdateType computeUpdateType(const Box&, StyleDiff, BlockFormattingState&)
52{
53 return LayoutState::UpdateType::All;
54}
55
56static LayoutState::UpdateType computeUpdateTypeForAncestor(const Container&, StyleDiff, BlockFormattingState&)
57{
58 return LayoutState::UpdateType::All;
59}
60
61InvalidationResult BlockInvalidation::invalidate(const Box& layoutBox, StyleDiff styleDiff, LayoutState& layoutState,
62 BlockFormattingState& formattingState)
63{
64 // Invalidate this box and the containing block chain all the way up to the formatting context root (and beyond if needed).
65 layoutState.markNeedsUpdate(layoutBox, computeUpdateType(layoutBox, styleDiff, formattingState));
66 for (auto* containingBlock = layoutBox.containingBlock(); containingBlock; containingBlock = containingBlock->containingBlock()) {
67 if (containingBlock->establishesFormattingContext() && invalidationStopsAtFormattingContextBoundary(*containingBlock, layoutBox, styleDiff))
68 return { containingBlock };
69 layoutState.markNeedsUpdate(*containingBlock, computeUpdateTypeForAncestor(*containingBlock, styleDiff, formattingState));
70 }
71 // Invalidation always stops at the initial containing block.
72 ASSERT_NOT_REACHED();
73 return { nullptr };
74}
75
76}
77}
78#endif
79