| // 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_constraint_space.h" |
| |
| #include "core/layout/LayoutBlock.h" |
| #include "core/layout/LayoutView.h" |
| #include "core/layout/ng/ng_constraint_space_builder.h" |
| #include "core/layout/ng/ng_layout_opportunity_iterator.h" |
| |
| namespace blink { |
| |
| NGConstraintSpace::NGConstraintSpace( |
| NGWritingMode writing_mode, |
| TextDirection direction, |
| NGLogicalSize available_size, |
| NGLogicalSize percentage_resolution_size, |
| bool is_fixed_size_inline, |
| bool is_fixed_size_block, |
| bool is_shrink_to_fit, |
| bool is_inline_direction_triggers_scrollbar, |
| bool is_block_direction_triggers_scrollbar, |
| NGFragmentationType block_direction_fragmentation_type, |
| bool is_new_fc, |
| const std::shared_ptr<NGExclusions>& exclusions_) |
| : available_size_(available_size), |
| percentage_resolution_size_(percentage_resolution_size), |
| is_fixed_size_inline_(is_fixed_size_inline), |
| is_fixed_size_block_(is_fixed_size_block), |
| is_shrink_to_fit_(is_shrink_to_fit), |
| is_inline_direction_triggers_scrollbar_( |
| is_inline_direction_triggers_scrollbar), |
| is_block_direction_triggers_scrollbar_( |
| is_block_direction_triggers_scrollbar), |
| block_direction_fragmentation_type_(block_direction_fragmentation_type), |
| is_new_fc_(is_new_fc), |
| writing_mode_(writing_mode), |
| direction_(static_cast<unsigned>(direction)), |
| exclusions_(exclusions_) {} |
| |
| NGConstraintSpace* NGConstraintSpace::CreateFromLayoutObject( |
| const LayoutBox& box) { |
| bool fixed_inline = false, fixed_block = false; |
| // XXX for orthogonal writing mode this is not right |
| LayoutUnit available_logical_width = |
| std::max(LayoutUnit(), box.containingBlockLogicalWidthForContent()); |
| LayoutUnit available_logical_height; |
| if (!box.parent()) { |
| available_logical_height = box.view()->viewLogicalHeightForPercentages(); |
| } else if (box.containingBlock()) { |
| available_logical_height = |
| box.containingBlock()->availableLogicalHeightForPercentageComputation(); |
| } |
| // When we have an override size, the available_logical_{width,height} will be |
| // used as the final size of the box, so it has to include border and |
| // padding. |
| if (box.hasOverrideLogicalContentWidth()) { |
| available_logical_width = |
| box.borderAndPaddingLogicalWidth() + box.overrideLogicalContentWidth(); |
| fixed_inline = true; |
| } |
| if (box.hasOverrideLogicalContentHeight()) { |
| available_logical_height = box.borderAndPaddingLogicalHeight() + |
| box.overrideLogicalContentHeight(); |
| fixed_block = true; |
| } |
| |
| bool is_new_fc = |
| box.isLayoutBlock() && toLayoutBlock(box).createsNewFormattingContext(); |
| |
| NGLogicalSize size = {available_logical_width, available_logical_height}; |
| auto writing_mode = FromPlatformWritingMode(box.styleRef().getWritingMode()); |
| return NGConstraintSpaceBuilder(writing_mode) |
| .SetAvailableSize(size) |
| .SetPercentageResolutionSize(size) |
| .SetIsInlineDirectionTriggersScrollbar( |
| box.styleRef().overflowInlineDirection() == EOverflow::Auto) |
| .SetIsBlockDirectionTriggersScrollbar( |
| box.styleRef().overflowBlockDirection() == EOverflow::Auto) |
| .SetIsFixedSizeInline(fixed_inline) |
| .SetIsFixedSizeBlock(fixed_block) |
| .SetIsShrinkToFit( |
| box.sizesLogicalWidthToFitContent(box.styleRef().logicalWidth())) |
| .SetIsNewFormattingContext(is_new_fc) |
| .SetTextDirection(box.styleRef().direction()) |
| .ToConstraintSpace(); |
| } |
| |
| void NGConstraintSpace::AddExclusion(const NGExclusion& exclusion) { |
| exclusions_->Add(exclusion); |
| } |
| |
| NGFragmentationType NGConstraintSpace::BlockFragmentationType() const { |
| return static_cast<NGFragmentationType>(block_direction_fragmentation_type_); |
| } |
| |
| void NGConstraintSpace::Subtract(const NGFragment*) { |
| // TODO(layout-ng): Implement. |
| } |
| |
| NGLayoutOpportunityIterator* NGConstraintSpace::LayoutOpportunities( |
| unsigned clear, |
| bool for_inline_or_bfc) { |
| NGLayoutOpportunityIterator* iterator = new NGLayoutOpportunityIterator(this); |
| return iterator; |
| } |
| |
| String NGConstraintSpace::ToString() const { |
| return String::format("%s,%s %sx%s", |
| offset_.inline_offset.toString().ascii().data(), |
| offset_.block_offset.toString().ascii().data(), |
| AvailableSize().inline_size.toString().ascii().data(), |
| AvailableSize().block_size.toString().ascii().data()); |
| } |
| |
| } // namespace blink |