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 "FormattingContext.h"
28
29#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
30
31#include "LayoutBox.h"
32#include "LayoutContainer.h"
33#include "LayoutState.h"
34
35namespace WebCore {
36namespace Layout {
37
38LayoutUnit FormattingContext::Quirks::heightValueOfNearestContainingBlockWithFixedHeight(const LayoutState& layoutState, const Box& layoutBox)
39{
40 // In quirks mode, we go and travers the containing block chain to find a block level box with fixed height value, even if it means leaving
41 // the current formatting context. FIXME: surely we need to do some tricks here when block direction support is added.
42 auto* containingBlock = layoutBox.containingBlock();
43 LayoutUnit bodyAndDocumentVerticalMarginPaddingAndBorder;
44 while (containingBlock) {
45 auto containingBlockHeight = containingBlock->style().logicalHeight();
46 if (containingBlockHeight.isFixed())
47 return containingBlockHeight.value() - bodyAndDocumentVerticalMarginPaddingAndBorder;
48
49 // If the only fixed value box we find is the ICB, then ignore the body and the document (vertical) margin, padding and border. So much quirkiness.
50 // -and it's totally insane because now we freely travel across formatting context boundaries and computed margins are nonexistent.
51 if (containingBlock->isBodyBox() || containingBlock->isDocumentBox()) {
52 auto& displayBox = layoutState.displayBoxForLayoutBox(*containingBlock);
53
54 auto usedValues = UsedHorizontalValues { layoutState.displayBoxForLayoutBox(*containingBlock->containingBlock()).contentBoxWidth() };
55 auto verticalMargin = Geometry::computedVerticalMargin(*containingBlock, usedValues);
56 auto verticalPadding = displayBox.paddingTop().valueOr(0) + displayBox.paddingBottom().valueOr(0);
57 auto verticalBorder = displayBox.borderTop() + displayBox.borderBottom();
58 bodyAndDocumentVerticalMarginPaddingAndBorder += verticalMargin.before.valueOr(0) + verticalMargin.after.valueOr(0) + verticalPadding + verticalBorder;
59 }
60
61 containingBlock = containingBlock->containingBlock();
62 }
63 // Initial containing block has to have a height.
64 return layoutState.displayBoxForLayoutBox(layoutBox.initialContainingBlock()).contentBox().height() - bodyAndDocumentVerticalMarginPaddingAndBorder;
65}
66
67}
68}
69
70#endif
71