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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/style/ComputedStyle.h" | 12 #include "core/style/ComputedStyle.h" |
13 #include "platform/LengthFunctions.h" | 13 #include "platform/LengthFunctions.h" |
14 | 14 |
15 namespace blink { | 15 namespace blink { |
16 | 16 |
17 NGBlockLayoutAlgorithm::NGBlockLayoutAlgorithm( | 17 NGBlockLayoutAlgorithm::NGBlockLayoutAlgorithm( |
18 PassRefPtr<const ComputedStyle> style, | 18 PassRefPtr<const ComputedStyle> style, |
19 NGBoxIterator box_iterator) | 19 NGBox* first_child) |
20 : style_(style), box_iterator_(box_iterator) {} | 20 : style_(style), first_child_(first_child), state_(kStateInit) {} |
21 | 21 |
22 bool NGBlockLayoutAlgorithm::Layout(const NGConstraintSpace* constraint_space, | 22 bool NGBlockLayoutAlgorithm::Layout(const NGConstraintSpace* constraint_space, |
23 NGFragment** out) { | 23 NGFragment** out) { |
24 LayoutUnit inline_size = | 24 switch (state_) { |
ikilpatrick
2016/08/29 16:35:51
what does this look like with interleaved case's?
| |
25 computeInlineSizeForFragment(*constraint_space, *style_); | 25 case kStateInit: { |
26 // TODO(layout-ng): For quirks mode, should we pass blockSize instead of -1? | 26 LayoutUnit inline_size = |
27 LayoutUnit block_size = | 27 computeInlineSizeForFragment(*constraint_space, *style_); |
28 computeBlockSizeForFragment(*constraint_space, *style_, LayoutUnit(-1)); | 28 // TODO(layout-ng): For quirks mode, should we pass blockSize instead of |
29 NGConstraintSpace* constraint_space_for_children = new NGConstraintSpace( | 29 // -1? |
30 *constraint_space, NGLogicalSize(inline_size, block_size)); | 30 LayoutUnit block_size = computeBlockSizeForFragment( |
31 *constraint_space, *style_, LayoutUnit(-1)); | |
32 constraint_space_for_children_ = new NGConstraintSpace( | |
33 *constraint_space, NGLogicalSize(inline_size, block_size)); | |
34 content_size_ = LayoutUnit(); | |
31 | 35 |
32 NGFragmentBuilder builder(NGFragmentBase::FragmentBox); | 36 builder_ = new NGFragmentBuilder(NGFragmentBase::FragmentBox); |
33 builder.SetInlineSize(inline_size).SetBlockSize(block_size); | 37 builder_->SetInlineSize(inline_size).SetBlockSize(block_size); |
38 current_child_ = first_child_; | |
39 state_ = kStateChildLayout; | |
40 return false; | |
41 } | |
42 case kStateChildLayout: { | |
43 if (current_child_) { | |
44 NGFragment* fragment; | |
45 if (!current_child_->Layout(constraint_space_for_children_, &fragment)) | |
46 return false; | |
47 NGBoxStrut child_margins = computeMargins( | |
48 *constraint_space_for_children_, *current_child_->Style()); | |
49 // TODO(layout-ng): Support auto margins | |
50 fragment->SetOffset(child_margins.inline_start, | |
51 content_size_ + child_margins.block_start); | |
52 current_child_->PositionUpdated(*fragment); | |
53 content_size_ += fragment->BlockSize() + child_margins.BlockSum(); | |
54 max_inline_size_ = | |
55 std::max(max_inline_size_, | |
56 fragment->InlineSize() + child_margins.InlineSum()); | |
57 builder_->AddChild(fragment); | |
58 current_child_ = current_child_->NextSibling(); | |
59 if (current_child_) | |
60 return false; | |
61 } | |
34 | 62 |
35 LayoutUnit content_size; | 63 state_ = kStateFinalize; |
36 for (NGBox box : box_iterator_) { | 64 return false; |
37 NGBoxStrut child_margins = | 65 } |
38 computeMargins(*constraint_space_for_children, *box.style()); | 66 case kStateFinalize: { |
39 NGFragment* fragment; | 67 // Recompute the block-axis size now that we know our content size. |
40 // TODO(layout-ng): Actually make this async | 68 LayoutUnit block_size = computeBlockSizeForFragment( |
41 while (!box.Layout(constraint_space_for_children, &fragment)) | 69 *constraint_space, *style_, content_size_); |
42 ; | |
43 // TODO(layout-ng): Support auto margins | |
44 fragment->SetOffset(child_margins.inline_start, | |
45 content_size + child_margins.block_start); | |
46 box.positionUpdated(*fragment); | |
47 content_size += fragment->BlockSize() + child_margins.BlockSum(); | |
48 builder.AddChild(fragment); | |
49 } | |
50 | 70 |
51 // Recompute the block-axis size now that we know our content size. | 71 builder_->SetBlockSize(block_size) |
52 block_size = | 72 .SetInlineOverflow(max_inline_size_) |
53 computeBlockSizeForFragment(*constraint_space, *style_, content_size); | 73 .SetBlockOverflow(content_size_); |
54 | 74 *out = builder_->ToFragment(); |
55 // TODO(layout-ng): Compute correct inline overflow (block overflow should be | 75 state_ = kStateInit; |
56 // correct) | 76 return true; |
57 builder.SetBlockSize(block_size) | 77 } |
58 .SetInlineOverflow(inline_size) | 78 }; |
59 .SetBlockOverflow(content_size); | 79 NOTREACHED(); |
60 *out = builder.ToFragment(); | 80 *out = nullptr; |
61 return true; | 81 return true; |
62 } | 82 } |
63 | 83 |
64 } // namespace blink | 84 } // namespace blink |
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