| // 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_exclusion_space.h" |
| |
| namespace blink { |
| |
| NGConstraintSpaceBuilder::NGConstraintSpaceBuilder( |
| const NGConstraintSpace& parent_space) |
| : NGConstraintSpaceBuilder(parent_space.WritingMode(), |
| parent_space.InitialContainingBlockSize()) {} |
| |
| NGConstraintSpaceBuilder::NGConstraintSpaceBuilder(NGWritingMode writing_mode, |
| NGPhysicalSize icb_size) |
| : initial_containing_block_size_(icb_size), |
| 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), |
| is_anonymous_(false), |
| text_direction_(static_cast<unsigned>(TextDirection::kLtr)), |
| exclusion_space_(nullptr) {} |
| |
| 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::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::SetBfcOffset( |
| const NGLogicalOffset& bfc_offset) { |
| bfc_offset_ = bfc_offset; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetFloatsBfcOffset( |
| const WTF::Optional<NGLogicalOffset>& floats_bfc_offset) { |
| floats_bfc_offset_ = floats_bfc_offset; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetClearanceOffset( |
| const WTF::Optional<LayoutUnit>& clearance_offset) { |
| clearance_offset_ = clearance_offset; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetExclusionSpace( |
| const NGExclusionSpace& exclusion_space) { |
| exclusion_space_ = &exclusion_space; |
| 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; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetIsAnonymous( |
| bool is_anonymous) { |
| is_anonymous_ = is_anonymous; |
| return *this; |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetUnpositionedFloats( |
| Vector<RefPtr<NGUnpositionedFloat>>& unpositioned_floats) { |
| unpositioned_floats_ = unpositioned_floats; |
| return *this; |
| } |
| |
| void NGConstraintSpaceBuilder::AddBaselineRequests( |
| const Vector<NGBaselineRequest>& requests) { |
| DCHECK(baseline_requests_.IsEmpty()); |
| baseline_requests_.AppendVector(requests); |
| } |
| |
| NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::AddBaselineRequest( |
| const NGBaselineRequest& request) { |
| for (const auto& existing : baseline_requests_) { |
| if (existing == request) |
| return *this; |
| } |
| baseline_requests_.push_back(request); |
| return *this; |
| } |
| |
| RefPtr<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 = IsParallelWritingMode( |
| static_cast<NGWritingMode>(parent_writing_mode_), out_writing_mode); |
| |
| NGLogicalSize available_size = available_size_; |
| NGLogicalSize percentage_resolution_size = percentage_resolution_size_; |
| Optional<NGLogicalSize> parent_percentage_resolution_size = |
| parent_percentage_resolution_size_; |
| if (!is_in_parallel_flow) { |
| available_size.Flip(); |
| percentage_resolution_size.Flip(); |
| if (parent_percentage_resolution_size.has_value()) |
| parent_percentage_resolution_size->Flip(); |
| } |
| |
| // 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; |
| } |
| } |
| // parent_percentage_resolution_size is so rarely used that compute indefinite |
| // fallback in NGConstraintSpace when it is used. |
| Optional<LayoutUnit> parent_percentage_resolution_inline_size = |
| parent_percentage_resolution_size.has_value() |
| ? parent_percentage_resolution_size->inline_size |
| : Optional<LayoutUnit>(); |
| |
| DEFINE_STATIC_LOCAL(NGExclusionSpace, empty_exclusion_space, ()); |
| |
| // Reset things that do not pass the Formatting Context boundary. |
| if (is_new_fc_) |
| DCHECK(unpositioned_floats_.IsEmpty()); |
| |
| const NGExclusionSpace& exclusion_space = (is_new_fc_ || !exclusion_space_) |
| ? empty_exclusion_space |
| : *exclusion_space_; |
| NGLogicalOffset bfc_offset = is_new_fc_ ? NGLogicalOffset() : bfc_offset_; |
| NGMarginStrut margin_strut = is_new_fc_ ? NGMarginStrut() : margin_strut_; |
| WTF::Optional<LayoutUnit> clearance_offset = |
| is_new_fc_ ? WTF::nullopt : clearance_offset_; |
| WTF::Optional<NGLogicalOffset> floats_bfc_offset = |
| is_new_fc_ ? WTF::nullopt : floats_bfc_offset_; |
| |
| if (floats_bfc_offset) { |
| floats_bfc_offset = NGLogicalOffset( |
| {bfc_offset.inline_offset, floats_bfc_offset.value().block_offset}); |
| } |
| |
| if (is_in_parallel_flow) { |
| return AdoptRef(new NGConstraintSpace( |
| static_cast<NGWritingMode>(out_writing_mode), |
| static_cast<TextDirection>(text_direction_), available_size, |
| percentage_resolution_size, parent_percentage_resolution_inline_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_, |
| is_anonymous_, margin_strut, bfc_offset, floats_bfc_offset, |
| exclusion_space, unpositioned_floats_, clearance_offset, |
| baseline_requests_)); |
| } |
| return AdoptRef(new NGConstraintSpace( |
| out_writing_mode, static_cast<TextDirection>(text_direction_), |
| available_size, percentage_resolution_size, |
| parent_percentage_resolution_inline_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_, |
| is_anonymous_, margin_strut, bfc_offset, floats_bfc_offset, |
| exclusion_space, unpositioned_floats_, clearance_offset, |
| baseline_requests_)); |
| } |
| |
| } // namespace blink |