| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "core/layout/ng/ng_block_layout_algorithm.h" |
| |
| #include "core/layout/LayoutBox.h" |
| #include "core/layout/ng/ng_constraint_space.h" |
| #include "core/layout/ng/ng_fragment_builder.h" |
| #include "core/layout/ng/ng_fragment.h" |
| #include "core/layout/ng/ng_length_utils.h" |
| #include "core/style/ComputedStyle.h" |
| #include "platform/LengthFunctions.h" |
| |
| namespace blink { |
| |
| NGBlockLayoutAlgorithm::NGBlockLayoutAlgorithm( |
| PassRefPtr<const ComputedStyle> style, |
| NGBoxIterator box_iterator) |
| : style_(style), box_iterator_(box_iterator) {} |
| |
| bool NGBlockLayoutAlgorithm::Layout(const NGConstraintSpace* constraint_space, |
| NGFragment** out) { |
| LayoutUnit inline_size = |
| computeInlineSizeForFragment(*constraint_space, *style_); |
| // TODO(layout-ng): For quirks mode, should we pass blockSize instead of -1? |
| LayoutUnit block_size = |
| computeBlockSizeForFragment(*constraint_space, *style_, LayoutUnit(-1)); |
| NGConstraintSpace* constraint_space_for_children = new NGConstraintSpace( |
| *constraint_space, NGLogicalSize(inline_size, block_size)); |
| |
| NGFragmentBuilder builder(NGFragmentBase::FragmentBox); |
| builder.SetInlineSize(inline_size).SetBlockSize(block_size); |
| |
| LayoutUnit content_size; |
| for (NGBox box : box_iterator_) { |
| NGBoxStrut child_margins = |
| computeMargins(*constraint_space_for_children, *box.style()); |
| NGFragment* fragment; |
| // TODO(layout-ng): Actually make this async |
| while (!box.Layout(constraint_space_for_children, &fragment)) |
| ; |
| // TODO(layout-ng): Support auto margins |
| fragment->SetOffset(child_margins.inline_start, |
| content_size + child_margins.block_start); |
| box.positionUpdated(*fragment); |
| content_size += fragment->BlockSize() + child_margins.BlockSum(); |
| builder.AddChild(fragment); |
| } |
| |
| // Recompute the block-axis size now that we know our content size. |
| block_size = |
| computeBlockSizeForFragment(*constraint_space, *style_, content_size); |
| |
| // TODO(layout-ng): Compute correct inline overflow (block overflow should be |
| // correct) |
| builder.SetBlockSize(block_size) |
| .SetInlineOverflow(inline_size) |
| .SetBlockOverflow(content_size); |
| *out = builder.ToFragment(); |
| return true; |
| } |
| |
| } // namespace blink |