| // 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_result.h" |
| |
| namespace blink { |
| |
| NGConstraintSpace::NGConstraintSpace( |
| NGWritingMode writing_mode, |
| TextDirection direction, |
| NGLogicalSize available_size, |
| NGLogicalSize percentage_resolution_size, |
| Optional<LayoutUnit> parent_percentage_resolution_inline_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 WTF::Optional<NGLogicalOffset>& floats_bfc_offset, |
| const std::shared_ptr<NGExclusions>& exclusions, |
| Vector<RefPtr<NGUnpositionedFloat>>& unpositioned_floats, |
| const WTF::Optional<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_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), |
| floats_bfc_offset_(floats_bfc_offset), |
| exclusions_(exclusions), |
| clearance_offset_(clearance_offset) { |
| unpositioned_floats_.swap(unpositioned_floats); |
| baseline_requests_.swap(baseline_requests); |
| } |
| |
| RefPtr<NGConstraintSpace> NGConstraintSpace::CreateFromLayoutObject( |
| const LayoutBox& box, |
| Optional<LayoutUnit> override_logical_width, |
| Optional<LayoutUnit> override_logical_height) { |
| 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; |
| } else if (override_logical_width.has_value()) { |
| available_size.inline_size = |
| box.BorderAndPaddingLogicalWidth() + override_logical_width.value(); |
| fixed_inline = true; |
| } |
| if (box.HasOverrideLogicalContentHeight()) { |
| available_size.block_size = box.BorderAndPaddingLogicalHeight() + |
| box.OverrideLogicalContentHeight(); |
| fixed_block = true; |
| } else if (override_logical_height.has_value()) { |
| available_size.block_size = |
| box.BorderAndPaddingLogicalHeight() + override_logical_height.value(); |
| fixed_block = true; |
| } |
| |
| 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()); |
| |
| 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); |
| } |
| |
| Optional<LayoutUnit> NGConstraintSpace::ParentPercentageResolutionInlineSize() |
| const { |
| if (!parent_percentage_resolution_inline_size_.has_value()) |
| return {}; |
| if (*parent_percentage_resolution_inline_size_ != NGSizeIndefinite) |
| return *parent_percentage_resolution_inline_size_; |
| return initial_containing_block_size_.ConvertToLogical(WritingMode()) |
| .inline_size; |
| } |
| |
| void NGConstraintSpace::AddExclusion(const NGExclusion& exclusion) { |
| exclusions_->Add(exclusion); |
| } |
| |
| NGFragmentationType NGConstraintSpace::BlockFragmentationType() const { |
| return static_cast<NGFragmentationType>(block_direction_fragmentation_type_); |
| } |
| |
| bool NGConstraintSpace::operator==(const NGConstraintSpace& other) const { |
| // TODO(cbiesinger): For simplicity and performance, for now, we only |
| // consider two constraint spaces equal if neither one has unpositioned |
| // floats. We should consider changing this in the future. |
| if (unpositioned_floats_.size() || other.unpositioned_floats_.size()) |
| return false; |
| |
| if (exclusions_ && other.exclusions_ && *exclusions_ != *other.exclusions_) |
| 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_space_available_ == |
| other.fragmentainer_space_available_ && |
| 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_ && |
| is_inline_direction_triggers_scrollbar_ == |
| other.is_inline_direction_triggers_scrollbar_ && |
| is_block_direction_triggers_scrollbar_ == |
| other.is_block_direction_triggers_scrollbar_ && |
| block_direction_fragmentation_type_ == |
| other.block_direction_fragmentation_type_ && |
| is_new_fc_ == other.is_new_fc_ && |
| is_anonymous_ == other.is_anonymous_ && |
| 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 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 |
