| // 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 "third_party/blink/renderer/core/layout/ng/ng_constraint_space.h" |
| |
| #include <algorithm> |
| #include <memory> |
| |
| #include "third_party/blink/renderer/core/layout/layout_block.h" |
| #include "third_party/blink/renderer/core/layout/layout_flexible_box.h" |
| #include "third_party/blink/renderer/core/layout/layout_view.h" |
| #include "third_party/blink/renderer/core/layout/ng/ng_constraint_space_builder.h" |
| #include "third_party/blink/renderer/core/layout/ng/ng_length_utils.h" |
| |
| namespace blink { |
| |
| NGConstraintSpace::NGConstraintSpace( |
| WritingMode writing_mode, |
| bool is_orthogonal_writing_mode_root, |
| TextDirection direction, |
| NGLogicalSize available_size, |
| NGLogicalSize percentage_resolution_size, |
| LayoutUnit parent_percentage_resolution_inline_size, |
| NGPhysicalSize initial_containing_block_size, |
| LayoutUnit fragmentainer_block_size, |
| LayoutUnit fragmentainer_space_at_bfc_start, |
| bool is_fixed_size_inline, |
| bool is_fixed_size_block, |
| bool fixed_size_block_is_definite, |
| bool is_shrink_to_fit, |
| NGFragmentationType block_direction_fragmentation_type, |
| bool separate_leading_fragmentainer_margins, |
| bool is_new_fc, |
| bool is_anonymous, |
| bool use_first_line_style, |
| NGFloatTypes adjoining_floats, |
| const NGMarginStrut& margin_strut, |
| const NGBfcOffset& bfc_offset, |
| const base::Optional<NGBfcOffset>& floats_bfc_offset, |
| const NGExclusionSpace& exclusion_space, |
| LayoutUnit clearance_offset, |
| Vector<NGBaselineRequest>& baseline_requests) |
| : available_size_(available_size), |
| percentage_resolution_size_(percentage_resolution_size), |
| parent_percentage_resolution_inline_size_( |
| parent_percentage_resolution_inline_size), |
| initial_containing_block_size_(initial_containing_block_size), |
| fragmentainer_block_size_(fragmentainer_block_size), |
| fragmentainer_space_at_bfc_start_(fragmentainer_space_at_bfc_start), |
| is_fixed_size_inline_(is_fixed_size_inline), |
| is_fixed_size_block_(is_fixed_size_block), |
| fixed_size_block_is_definite_(fixed_size_block_is_definite), |
| is_shrink_to_fit_(is_shrink_to_fit), |
| block_direction_fragmentation_type_(block_direction_fragmentation_type), |
| separate_leading_fragmentainer_margins_( |
| separate_leading_fragmentainer_margins), |
| is_new_fc_(is_new_fc), |
| is_anonymous_(is_anonymous), |
| use_first_line_style_(use_first_line_style), |
| adjoining_floats_(adjoining_floats), |
| writing_mode_(static_cast<unsigned>(writing_mode)), |
| is_orthogonal_writing_mode_root_(is_orthogonal_writing_mode_root), |
| direction_(static_cast<unsigned>(direction)), |
| margin_strut_(margin_strut), |
| bfc_offset_(bfc_offset), |
| floats_bfc_offset_(floats_bfc_offset), |
| exclusion_space_(std::make_unique<NGExclusionSpace>(exclusion_space)), |
| clearance_offset_(clearance_offset) { |
| baseline_requests_.swap(baseline_requests); |
| } |
| |
| scoped_refptr<NGConstraintSpace> NGConstraintSpace::CreateFromLayoutObject( |
| const LayoutBox& box) { |
| auto writing_mode = box.StyleRef().GetWritingMode(); |
| bool parallel_containing_block = IsParallelWritingMode( |
| box.ContainingBlock()->StyleRef().GetWritingMode(), writing_mode); |
| bool fixed_inline = false, fixed_block = false; |
| bool fixed_block_is_definite = true; |
| |
| LayoutUnit available_logical_width; |
| if (parallel_containing_block && |
| box.HasOverrideContainingBlockContentLogicalWidth()) { |
| // Grid layout sets OverrideContainingBlockContentLogicalWidth|Height |
| available_logical_width = box.OverrideContainingBlockContentLogicalWidth(); |
| } else if (!parallel_containing_block && |
| box.HasOverrideContainingBlockContentLogicalHeight()) { |
| available_logical_width = box.OverrideContainingBlockContentLogicalHeight(); |
| } else { |
| 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 (parallel_containing_block && |
| box.HasOverrideContainingBlockContentLogicalHeight()) { |
| // Grid layout sets OverrideContainingBlockContentLogicalWidth|Height |
| available_logical_height = |
| box.OverrideContainingBlockContentLogicalHeight(); |
| } else if (!parallel_containing_block && |
| box.HasOverrideContainingBlockContentLogicalWidth()) { |
| available_logical_height = box.OverrideContainingBlockContentLogicalWidth(); |
| } else { |
| 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; |
| if (box.HasOverrideLogicalWidth()) { |
| available_size.inline_size = box.OverrideLogicalWidth(); |
| fixed_inline = true; |
| } |
| if (box.HasOverrideLogicalHeight()) { |
| available_size.block_size = box.OverrideLogicalHeight(); |
| fixed_block = true; |
| } |
| if (box.IsFlexItem() && fixed_block) { |
| fixed_block_is_definite = |
| ToLayoutFlexibleBox(box.Parent()) |
| ->UseOverrideLogicalHeightForPerentageResolution(box); |
| } |
| |
| bool is_new_fc = true; |
| // TODO(ikilpatrick): This DCHECK needs to be enabled once we've switched |
| // LayoutTableCell, etc over to LayoutNG. |
| // |
| // We currently need to "force" LayoutNG roots to be formatting contexts so |
| // that floats have layout performed on them. |
| // |
| // DCHECK(is_new_fc, |
| // box.IsLayoutBlock() && ToLayoutBlock(box).CreatesNewFormattingContext()); |
| |
| IntSize icb_size = box.View()->GetLayoutSize(kExcludeScrollbars); |
| NGPhysicalSize initial_containing_block_size{LayoutUnit(icb_size.Width()), |
| LayoutUnit(icb_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()); |
| |
| NGConstraintSpaceBuilder builder(writing_mode, initial_containing_block_size); |
| |
| if (!box.IsWritingModeRoot()) { |
| FontBaseline baseline_type = IsHorizontalWritingMode(writing_mode) |
| ? kAlphabeticBaseline |
| : kIdeographicBaseline; |
| // Add all types because we don't know which baselines will be requested. |
| bool synthesize_inline_block_baseline = |
| box.IsLayoutBlock() && |
| ToLayoutBlock(box).UseLogicalBottomMarginEdgeForInlineBlockBaseline(); |
| if (!synthesize_inline_block_baseline) { |
| builder.AddBaselineRequest( |
| {NGBaselineAlgorithmType::kAtomicInline, baseline_type}); |
| } |
| builder.AddBaselineRequest( |
| {NGBaselineAlgorithmType::kFirstLine, baseline_type}); |
| } |
| |
| return builder.SetAvailableSize(available_size) |
| .SetPercentageResolutionSize(percentage_size) |
| .SetIsFixedSizeInline(fixed_inline) |
| .SetIsFixedSizeBlock(fixed_block) |
| .SetFixedSizeBlockIsDefinite(fixed_block_is_definite) |
| .SetIsShrinkToFit( |
| box.SizesLogicalWidthToFitContent(box.StyleRef().LogicalWidth())) |
| .SetIsNewFormattingContext(is_new_fc) |
| .SetTextDirection(box.StyleRef().Direction()) |
| .ToConstraintSpace(writing_mode); |
| } |
| |
| LayoutUnit |
| NGConstraintSpace::PercentageResolutionInlineSizeForParentWritingMode() const { |
| if (!IsOrthogonalWritingModeRoot()) |
| return PercentageResolutionSize().inline_size; |
| if (PercentageResolutionSize().block_size != NGSizeIndefinite) |
| return PercentageResolutionSize().block_size; |
| if (IsHorizontalWritingMode(GetWritingMode())) |
| return InitialContainingBlockSize().height; |
| return InitialContainingBlockSize().width; |
| } |
| |
| LayoutUnit NGConstraintSpace::ParentPercentageResolutionInlineSize() const { |
| if (parent_percentage_resolution_inline_size_ != NGSizeIndefinite) |
| return parent_percentage_resolution_inline_size_; |
| return initial_containing_block_size_.ConvertToLogical(GetWritingMode()) |
| .inline_size; |
| } |
| |
| NGFragmentationType NGConstraintSpace::BlockFragmentationType() const { |
| return static_cast<NGFragmentationType>(block_direction_fragmentation_type_); |
| } |
| |
| bool NGConstraintSpace::operator==(const NGConstraintSpace& other) const { |
| if (exclusion_space_ && other.exclusion_space_ && |
| *exclusion_space_ != *other.exclusion_space_) |
| return false; |
| |
| return available_size_ == other.available_size_ && |
| percentage_resolution_size_ == other.percentage_resolution_size_ && |
| parent_percentage_resolution_inline_size_ == |
| other.parent_percentage_resolution_inline_size_ && |
| initial_containing_block_size_ == |
| other.initial_containing_block_size_ && |
| fragmentainer_block_size_ == other.fragmentainer_block_size_ && |
| fragmentainer_space_at_bfc_start_ == |
| other.fragmentainer_space_at_bfc_start_ && |
| is_fixed_size_inline_ == other.is_fixed_size_inline_ && |
| is_fixed_size_block_ == other.is_fixed_size_block_ && |
| is_shrink_to_fit_ == other.is_shrink_to_fit_ && |
| block_direction_fragmentation_type_ == |
| other.block_direction_fragmentation_type_ && |
| is_new_fc_ == other.is_new_fc_ && |
| separate_leading_fragmentainer_margins_ == |
| other.separate_leading_fragmentainer_margins_ && |
| is_anonymous_ == other.is_anonymous_ && |
| adjoining_floats_ == other.adjoining_floats_ && |
| writing_mode_ == other.writing_mode_ && |
| direction_ == other.direction_ && |
| margin_strut_ == other.margin_strut_ && |
| bfc_offset_ == other.bfc_offset_ && |
| floats_bfc_offset_ == other.floats_bfc_offset_ && |
| clearance_offset_ == other.clearance_offset_ && |
| baseline_requests_ == other.baseline_requests_; |
| } |
| |
| bool NGConstraintSpace::operator!=(const NGConstraintSpace& other) const { |
| return !(*this == other); |
| } |
| |
| String NGConstraintSpace::ToString() const { |
| return String::Format("Offset: %s,%s Size: %sx%s Clearance: %s", |
| bfc_offset_.line_offset.ToString().Ascii().data(), |
| bfc_offset_.block_offset.ToString().Ascii().data(), |
| AvailableSize().inline_size.ToString().Ascii().data(), |
| AvailableSize().block_size.ToString().Ascii().data(), |
| HasClearanceOffset() |
| ? ClearanceOffset().ToString().Ascii().data() |
| : "none"); |
| } |
| |
| } // namespace blink |
