| // 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, |
| NGPhysicalSize initial_containing_block_size, |
| LayoutUnit fragmentainer_space_available, |
| 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, |
| bool is_anonymous, |
| const NGMarginStrut& margin_strut, |
| const NGLogicalOffset& bfc_offset, |
| const std::shared_ptr<NGExclusions>& exclusions, |
| const WTF::Optional<LayoutUnit>& clearance_offset) |
| : available_size_(available_size), |
| percentage_resolution_size_(percentage_resolution_size), |
| initial_containing_block_size_(initial_containing_block_size), |
| fragmentainer_space_available_(fragmentainer_space_available), |
| 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), |
| is_anonymous_(is_anonymous), |
| writing_mode_(writing_mode), |
| direction_(static_cast<unsigned>(direction)), |
| margin_strut_(margin_strut), |
| bfc_offset_(bfc_offset), |
| exclusions_(exclusions), |
| clearance_offset_(clearance_offset), |
| layout_opp_iter_(nullptr) {} |
| |
| RefPtr<NGConstraintSpace> NGConstraintSpace::CreateFromLayoutObject( |
| const LayoutBox& box) { |
| auto writing_mode = FromPlatformWritingMode(box.styleRef().getWritingMode()); |
| bool parallel_containing_block = IsParallelWritingMode( |
| FromPlatformWritingMode( |
| box.containingBlock()->styleRef().getWritingMode()), |
| writing_mode); |
| bool fixed_inline = false, fixed_block = false; |
| |
| LayoutUnit available_logical_width; |
| if (parallel_containing_block) |
| available_logical_width = box.containingBlockLogicalWidthForContent(); |
| else |
| available_logical_width = box.perpendicularContainingBlockLogicalHeight(); |
| available_logical_width = std::max(LayoutUnit(), available_logical_width); |
| |
| LayoutUnit available_logical_height; |
| if (!box.parent()) { |
| available_logical_height = box.view()->viewLogicalHeightForPercentages(); |
| } else if (box.containingBlock()) { |
| if (parallel_containing_block) { |
| available_logical_height = |
| box.containingBlock() |
| ->availableLogicalHeightForPercentageComputation(); |
| } else { |
| available_logical_height = box.containingBlockLogicalWidthForContent(); |
| } |
| } |
| NGLogicalSize percentage_size = {available_logical_width, |
| available_logical_height}; |
| NGLogicalSize available_size = percentage_size; |
| // 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_size.inline_size = |
| box.borderAndPaddingLogicalWidth() + box.overrideLogicalContentWidth(); |
| fixed_inline = true; |
| } |
| if (box.hasOverrideLogicalContentHeight()) { |
| available_size.block_size = box.borderAndPaddingLogicalHeight() + |
| box.overrideLogicalContentHeight(); |
| fixed_block = true; |
| } |
| |
| bool is_new_fc = |
| box.isLayoutBlock() && toLayoutBlock(box).createsNewFormattingContext(); |
| |
| FloatSize icb_float_size = box.view()->viewportSizeForViewportUnits(); |
| NGPhysicalSize initial_containing_block_size{ |
| LayoutUnit(icb_float_size.width()), LayoutUnit(icb_float_size.height())}; |
| |
| // ICB cannot be indefinite by the spec. |
| DCHECK_GE(initial_containing_block_size.width, LayoutUnit()); |
| DCHECK_GE(initial_containing_block_size.height, LayoutUnit()); |
| |
| return NGConstraintSpaceBuilder(writing_mode) |
| .SetAvailableSize(available_size) |
| .SetPercentageResolutionSize(percentage_size) |
| .SetInitialContainingBlockSize(initial_containing_block_size) |
| .SetIsInlineDirectionTriggersScrollbar( |
| box.styleRef().overflowInlineDirection() == EOverflow::kAuto) |
| .SetIsBlockDirectionTriggersScrollbar( |
| box.styleRef().overflowBlockDirection() == EOverflow::kAuto) |
| .SetIsFixedSizeInline(fixed_inline) |
| .SetIsFixedSizeBlock(fixed_block) |
| .SetIsShrinkToFit( |
| box.sizesLogicalWidthToFitContent(box.styleRef().logicalWidth())) |
| .SetIsNewFormattingContext(is_new_fc) |
| .SetTextDirection(box.styleRef().direction()) |
| .ToConstraintSpace(writing_mode); |
| } |
| |
| void NGConstraintSpace::AddExclusion(const NGExclusion& exclusion) { |
| exclusions_->Add(exclusion); |
| // Invalidate the Layout Opportunity Iterator. |
| layout_opp_iter_.reset(); |
| } |
| |
| NGFragmentationType NGConstraintSpace::BlockFragmentationType() const { |
| return static_cast<NGFragmentationType>(block_direction_fragmentation_type_); |
| } |
| |
| NGLayoutOpportunityIterator* NGConstraintSpace::LayoutOpportunityIterator() { |
| if (!layout_opp_iter_) { |
| layout_opp_iter_ = |
| WTF::makeUnique<NGLayoutOpportunityIterator>(this, this->bfc_offset_); |
| } |
| return layout_opp_iter_.get(); |
| } |
| |
| String NGConstraintSpace::ToString() const { |
| return String::format( |
| "Offset: %s,%s Size: %sx%s MarginStrut: %s" |
| " Clearance: %s", |
| bfc_offset_.inline_offset.toString().ascii().data(), |
| bfc_offset_.block_offset.toString().ascii().data(), |
| AvailableSize().inline_size.toString().ascii().data(), |
| AvailableSize().block_size.toString().ascii().data(), |
| margin_strut_.ToString().ascii().data(), |
| clearance_offset_.has_value() |
| ? clearance_offset_.value().toString().ascii().data() |
| : "none"); |
| } |
| |
| } // namespace blink |