| // 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. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_NG_INLINE_NG_INLINE_LAYOUT_ALGORITHM_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_NG_INLINE_NG_INLINE_LAYOUT_ALGORITHM_H_ |
| |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/layout/ng/inline/ng_inline_node.h" |
| #include "third_party/blink/renderer/core/layout/ng/inline/ng_logical_line_item.h" |
| #include "third_party/blink/renderer/core/layout/ng/ng_box_fragment_builder.h" |
| #include "third_party/blink/renderer/core/layout/ng/ng_constraint_space_builder.h" |
| #include "third_party/blink/renderer/core/layout/ng/ng_layout_algorithm.h" |
| #include "third_party/blink/renderer/core/layout/ng/ng_unpositioned_float.h" |
| #include "third_party/blink/renderer/platform/fonts/font_baseline.h" |
| #include "third_party/blink/renderer/platform/wtf/vector.h" |
| |
| namespace blink { |
| |
| class NGConstraintSpace; |
| class NGExclusionSpace; |
| class NGInlineBreakToken; |
| class NGInlineChildLayoutContext; |
| class NGInlineNode; |
| class NGInlineItem; |
| class NGInlineLayoutStateStack; |
| class NGLineInfo; |
| struct NGInlineBoxState; |
| struct NGInlineItemResult; |
| |
| // A class for laying out an inline formatting context, i.e. a block with inline |
| // children. |
| // |
| // This class determines the position of NGInlineItem and build line boxes. |
| // |
| // Uses NGLineBreaker to find NGInlineItems to form a line. |
| class CORE_EXPORT NGInlineLayoutAlgorithm final |
| : public NGLayoutAlgorithm<NGInlineNode, |
| NGLineBoxFragmentBuilder, |
| NGInlineBreakToken> { |
| public: |
| NGInlineLayoutAlgorithm(NGInlineNode, |
| const NGConstraintSpace&, |
| const NGInlineBreakToken*, |
| NGInlineChildLayoutContext* context); |
| ~NGInlineLayoutAlgorithm() override; |
| |
| void CreateLine(const NGLineLayoutOpportunity&, |
| NGLineInfo*, |
| NGExclusionSpace*); |
| |
| scoped_refptr<const NGLayoutResult> Layout() override; |
| |
| MinMaxSizesResult ComputeMinMaxSizes(const MinMaxSizesInput&) const override { |
| NOTREACHED(); |
| return {MinMaxSizes(), true}; |
| } |
| |
| private: |
| unsigned PositionLeadingFloats(NGExclusionSpace*, NGPositionedFloatVector*); |
| NGPositionedFloat PositionFloat(LayoutUnit origin_block_bfc_offset, |
| LayoutObject* floating_object, |
| NGExclusionSpace*) const; |
| |
| bool IsHorizontalWritingMode() const { return is_horizontal_writing_mode_; } |
| |
| void PrepareBoxStates(const NGLineInfo&, const NGInlineBreakToken*); |
| void RebuildBoxStates(const NGLineInfo&, |
| const NGInlineBreakToken*, |
| NGInlineLayoutStateStack*) const; |
| #if DCHECK_IS_ON() |
| void CheckBoxStates(const NGLineInfo&, const NGInlineBreakToken*) const; |
| #endif |
| |
| NGInlineBoxState* HandleOpenTag(const NGInlineItem&, |
| const NGInlineItemResult&, |
| NGLogicalLineItems*, |
| NGInlineLayoutStateStack*) const; |
| NGInlineBoxState* HandleCloseTag(const NGInlineItem&, |
| const NGInlineItemResult&, |
| NGInlineBoxState*); |
| |
| void BidiReorder(TextDirection base_direction); |
| |
| void PlaceControlItem(const NGInlineItem&, |
| const NGLineInfo&, |
| NGInlineItemResult*, |
| NGInlineBoxState*); |
| void PlaceHyphen(const NGInlineItemResult&, |
| LayoutUnit hyphen_inline_size, |
| NGInlineBoxState*); |
| NGInlineBoxState* PlaceAtomicInline(const NGInlineItem&, |
| const NGLineInfo&, |
| NGInlineItemResult*); |
| void PlaceLayoutResult(NGInlineItemResult*, |
| NGInlineBoxState*, |
| LayoutUnit inline_offset = LayoutUnit()); |
| void PlaceOutOfFlowObjects(const NGLineInfo&, const NGLineHeightMetrics&); |
| void PlaceFloatingObjects(const NGLineInfo&, |
| const NGLineHeightMetrics&, |
| const NGLineLayoutOpportunity&, |
| NGExclusionSpace*); |
| void PlaceListMarker(const NGInlineItem&, |
| NGInlineItemResult*, |
| const NGLineInfo&); |
| |
| LayoutUnit ApplyTextAlign(NGLineInfo*); |
| base::Optional<LayoutUnit> ApplyJustify(LayoutUnit space, NGLineInfo*); |
| |
| LayoutUnit ComputeContentSize(const NGLineInfo&, |
| const NGExclusionSpace&, |
| LayoutUnit line_height); |
| |
| NGLogicalLineItems& line_box_; |
| NGInlineLayoutStateStack* box_states_; |
| NGInlineChildLayoutContext* context_; |
| |
| FontBaseline baseline_type_ = FontBaseline::kAlphabeticBaseline; |
| |
| unsigned is_horizontal_writing_mode_ : 1; |
| unsigned quirks_mode_ : 1; |
| |
| #if DCHECK_IS_ON() |
| // True if |box_states_| is taken from |context_|, to check the |box_states_| |
| // is the same as when it is rebuilt. |
| bool is_box_states_from_context_ = false; |
| #endif |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_NG_INLINE_NG_INLINE_LAYOUT_ALGORITHM_H_ |