| // 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_builder.h" |
| |
| #include "core/layout/ng/ng_length_utils.h" |
| |
| namespace blink { |
| |
| NGConstraintSpaceBuilder::NGConstraintSpaceBuilder( |
| const NGConstraintSpace* parent_space) |
| : available_size_(parent_space->AvailableSize()), |
| percentage_resolution_size_(parent_space->PercentageResolutionSize()), |
| initial_containing_block_size_( |
| parent_space->InitialContainingBlockSize()), |
| fragmentainer_space_available_(NGSizeIndefinite), |
| parent_writing_mode_(parent_space->WritingMode()), |
| is_fixed_size_inline_(false), |
| is_fixed_size_block_(false), |
| is_shrink_to_fit_(false), |
| is_inline_direction_triggers_scrollbar_(false), |
| is_block_direction_triggers_scrollbar_(false), |
| fragmentation_type_(parent_space->BlockFragmentationType()), |
| is_new_fc_(parent_space->IsNewFormattingContext()), |
| text_direction_(static_cast<unsigned>(parent_space->Direction())), |
| bfc_offset_(parent_space->bfc_offset_), |
| exclusions_(parent_space->Exclusions()) {} |
| |
| NGConstraintSpaceBuilder::NGConstraintSpaceBuilder(NGWritingMode writing_mode) |
| : initial_containing_block_size_{NGSizeIndefinite, NGSizeIndefinite}, |
| fragmentainer_space_available_(NGSizeIndefinite), |
| parent_writing_mode_(writing_mode), |
| is_fixed_size_inline_(false), |
| is_fixed_size_block_(false), |
| is_shrink_to_fit_(false), |
| is_inline_direction_triggers_scrollbar_(false), |
| is_block_direction_triggers_scrollbar_(false), |
| fragmentation_type_(kFragmentNone), |
| is_new_fc_(false), |
| text_direction_(static_cast<unsigned>(TextDirection::kLtr)), |
| exclusions_(new NGExclusions()) {} |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetAvailableSize( |
| NGLogicalSize available_size) { |
| available_size_ = available_size; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetPercentageResolutionSize( |
| NGLogicalSize percentage_resolution_size) { |
| percentage_resolution_size_ = percentage_resolution_size; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& |
| NGConstraintSpaceBuilder::SetInitialContainingBlockSize(NGPhysicalSize size) { |
| initial_containing_block_size_ = size; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetTextDirection( |
| TextDirection text_direction) { |
| text_direction_ = static_cast<unsigned>(text_direction); |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetMarginStrut( |
| const NGMarginStrut& margin_strut) { |
| margin_strut_ = margin_strut; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetIsFixedSizeInline( |
| bool is_fixed_size_inline) { |
| is_fixed_size_inline_ = is_fixed_size_inline; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetIsFixedSizeBlock( |
| bool is_fixed_size_block) { |
| is_fixed_size_block_ = is_fixed_size_block; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetIsShrinkToFit( |
| bool shrink_to_fit) { |
| is_shrink_to_fit_ = shrink_to_fit; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& |
| NGConstraintSpaceBuilder::SetIsInlineDirectionTriggersScrollbar( |
| bool is_inline_direction_triggers_scrollbar) { |
| is_inline_direction_triggers_scrollbar_ = |
| is_inline_direction_triggers_scrollbar; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& |
| NGConstraintSpaceBuilder::SetIsBlockDirectionTriggersScrollbar( |
| bool is_block_direction_triggers_scrollbar) { |
| is_block_direction_triggers_scrollbar_ = |
| is_block_direction_triggers_scrollbar; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetFragmentationType( |
| NGFragmentationType fragmentation_type) { |
| fragmentation_type_ = fragmentation_type; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetIsNewFormattingContext( |
| bool is_new_fc) { |
| is_new_fc_ = is_new_fc; |
| return *this; |
| } |
| |
| NGConstraintSpace* NGConstraintSpaceBuilder::ToConstraintSpace( |
| NGWritingMode out_writing_mode) { |
| // Whether the child and the containing block are parallel to each other. |
| // Example: vertical-rl and vertical-lr |
| bool is_in_parallel_flow = (parent_writing_mode_ == kHorizontalTopBottom) == |
| (out_writing_mode == kHorizontalTopBottom); |
| |
| NGLogicalSize available_size = available_size_; |
| NGLogicalSize percentage_resolution_size = percentage_resolution_size_; |
| if (!is_in_parallel_flow) { |
| std::swap(available_size.inline_size, available_size.block_size); |
| std::swap(percentage_resolution_size.inline_size, |
| percentage_resolution_size.block_size); |
| } |
| |
| // If inline size is indefinite, use size of initial containing block. |
| // https://www.w3.org/TR/css-writing-modes-3/#orthogonal-auto |
| if (available_size.inline_size == NGSizeIndefinite) { |
| DCHECK(!is_in_parallel_flow); |
| if (out_writing_mode == kHorizontalTopBottom) { |
| available_size.inline_size = initial_containing_block_size_.width; |
| } else { |
| available_size.inline_size = initial_containing_block_size_.height; |
| } |
| } |
| if (percentage_resolution_size.inline_size == NGSizeIndefinite) { |
| DCHECK(!is_in_parallel_flow); |
| if (out_writing_mode == kHorizontalTopBottom) { |
| percentage_resolution_size.inline_size = |
| initial_containing_block_size_.width; |
| } else { |
| percentage_resolution_size.inline_size = |
| initial_containing_block_size_.height; |
| } |
| } |
| |
| // Exclusions do not pass the formatting context boundary. |
| std::shared_ptr<NGExclusions> exclusions( |
| is_new_fc_ ? std::make_shared<NGExclusions>() : exclusions_); |
| NGLogicalOffset bfc_offset = is_new_fc_ ? NGLogicalOffset() : bfc_offset_; |
| NGMarginStrut margin_strut = is_new_fc_ ? NGMarginStrut() : margin_strut_; |
| |
| if (is_in_parallel_flow) { |
| return new NGConstraintSpace( |
| static_cast<NGWritingMode>(out_writing_mode), |
| static_cast<TextDirection>(text_direction_), available_size, |
| percentage_resolution_size, initial_containing_block_size_, |
| fragmentainer_space_available_, is_fixed_size_inline_, |
| is_fixed_size_block_, is_shrink_to_fit_, |
| is_inline_direction_triggers_scrollbar_, |
| is_block_direction_triggers_scrollbar_, |
| static_cast<NGFragmentationType>(fragmentation_type_), is_new_fc_, |
| margin_strut, bfc_offset, exclusions); |
| } |
| return new NGConstraintSpace( |
| out_writing_mode, static_cast<TextDirection>(text_direction_), |
| available_size, percentage_resolution_size, |
| initial_containing_block_size_, fragmentainer_space_available_, |
| is_fixed_size_block_, is_fixed_size_inline_, is_shrink_to_fit_, |
| is_block_direction_triggers_scrollbar_, |
| is_inline_direction_triggers_scrollbar_, |
| static_cast<NGFragmentationType>(fragmentation_type_), is_new_fc_, |
| margin_strut, bfc_offset, exclusions); |
| } |
| |
| } // namespace blink |