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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "core/layout/ng/ng_block_layout_algorithm.h" | 5 #include "core/layout/ng/ng_block_layout_algorithm.h" |
6 | 6 |
7 #include "core/layout/LayoutBox.h" | 7 #include "core/layout/LayoutBox.h" |
8 #include "core/layout/ng/ng_constraint_space.h" | 8 #include "core/layout/ng/ng_constraint_space.h" |
9 #include "core/layout/ng/ng_fragment_builder.h" | 9 #include "core/layout/ng/ng_fragment_builder.h" |
10 #include "core/layout/ng/ng_fragment.h" | 10 #include "core/layout/ng/ng_fragment.h" |
11 #include "core/layout/ng/ng_length_utils.h" | 11 #include "core/layout/ng/ng_length_utils.h" |
12 #include "core/layout/ng/ng_margin_strut.h" | |
13 #include "core/style/ComputedStyle.h" | 12 #include "core/style/ComputedStyle.h" |
14 #include "platform/LengthFunctions.h" | 13 #include "platform/LengthFunctions.h" |
15 | 14 |
16 namespace blink { | 15 namespace blink { |
17 | 16 |
18 NGBlockLayoutAlgorithm::NGBlockLayoutAlgorithm( | 17 NGBlockLayoutAlgorithm::NGBlockLayoutAlgorithm( |
19 PassRefPtr<const ComputedStyle> style, | 18 PassRefPtr<const ComputedStyle> style, |
20 NGBoxIterator box_iterator) | 19 NGBoxIterator box_iterator) |
21 : m_style(style), m_boxIterator(box_iterator) {} | 20 : m_style(style), m_boxIterator(box_iterator) {} |
22 | 21 |
23 NGFragment* NGBlockLayoutAlgorithm::layout( | 22 NGFragment* NGBlockLayoutAlgorithm::layout( |
24 const NGConstraintSpace& constraint_space) { | 23 const NGConstraintSpace& constraint_space) { |
25 LayoutUnit inline_size = | 24 LayoutUnit inline_size = |
26 computeInlineSizeForFragment(constraint_space, *m_style); | 25 computeInlineSizeForFragment(constraint_space, *m_style); |
27 // TODO(layout-ng): For quirks mode, should we pass blockSize instead of -1? | 26 // TODO(layout-ng): For quirks mode, should we pass blockSize instead of -1? |
28 LayoutUnit block_size = | 27 LayoutUnit block_size = |
29 computeBlockSizeForFragment(constraint_space, *m_style, LayoutUnit(-1)); | 28 computeBlockSizeForFragment(constraint_space, *m_style, LayoutUnit(-1)); |
30 NGConstraintSpace constraint_space_for_children( | 29 NGConstraintSpace constraint_space_for_children( |
31 constraint_space, NGLogicalSize(inline_size, block_size)); | 30 constraint_space, NGLogicalSize(inline_size, block_size)); |
32 | 31 |
33 NGFragmentBuilder builder(NGFragmentBase::FragmentBox); | 32 NGFragmentBuilder builder(NGFragmentBase::FragmentBox); |
34 builder.SetInlineSize(inline_size).SetBlockSize(block_size); | 33 builder.SetInlineSize(inline_size).SetBlockSize(block_size); |
35 | 34 |
36 LayoutUnit content_size; | 35 LayoutUnit content_size; |
37 for (NGBox box : m_boxIterator) { | 36 for (NGBox box : m_boxIterator) { |
38 NGBoxMargins child_margins = | 37 NGBoxStrut child_margins = |
39 computeMargins(constraint_space_for_children, *box.style()); | 38 computeMargins(constraint_space_for_children, *box.style()); |
40 NGFragment* fragment = box.layout(constraint_space_for_children); | 39 NGFragment* fragment = box.layout(constraint_space_for_children); |
41 // TODO(layout-ng): Support auto margins | 40 // TODO(layout-ng): Support auto margins |
42 fragment->SetOffset(child_margins.inline_start, | 41 fragment->SetOffset(child_margins.inline_start, |
43 content_size + child_margins.block_start); | 42 content_size + child_margins.block_start); |
44 box.positionUpdated(*fragment); | 43 box.positionUpdated(*fragment); |
45 content_size += fragment->BlockSize() + child_margins.BlockSum(); | 44 content_size += fragment->BlockSize() + child_margins.BlockSum(); |
46 builder.AddChild(fragment); | 45 builder.AddChild(fragment); |
47 } | 46 } |
48 | 47 |
49 // Recompute the block-axis size now that we know our content size. | 48 // Recompute the block-axis size now that we know our content size. |
50 block_size = | 49 block_size = |
51 computeBlockSizeForFragment(constraint_space, *m_style, content_size); | 50 computeBlockSizeForFragment(constraint_space, *m_style, content_size); |
52 // TODO(layout-ng): Compute correct inline overflow (block overflow should be | 51 // TODO(layout-ng): Compute correct inline overflow (block overflow should be |
53 // correct) | 52 // correct) |
54 builder.SetBlockSize(block_size) | 53 builder.SetBlockSize(block_size) |
55 .SetInlineOverflow(inline_size) | 54 .SetInlineOverflow(inline_size) |
56 .SetBlockOverflow(content_size); | 55 .SetBlockOverflow(content_size); |
57 return builder.ToFragment(); | 56 return builder.ToFragment(); |
58 } | 57 } |
59 | 58 |
60 } // namespace blink | 59 } // namespace blink |
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