third_party/blink/renderer/core/layout/line/root_inline_box.h - chromium/src - Git at Google

 /*
  * Copyright (C) 2003, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */

 #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_ROOT_INLINE_BOX_H_
 #define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_ROOT_INLINE_BOX_H_

 #include <memory>

 #include "third_party/blink/renderer/core/layout/api/line_layout_item.h"
 #include "third_party/blink/renderer/core/layout/line/inline_flow_box.h"
 #include "third_party/blink/renderer/platform/text/bidi_context.h"

 namespace blink {

 class EllipsisBox;
 class HitTestResult;
 class LineLayoutBlockFlow;

 struct BidiStatus;

 enum ForceEllipsisOnLine { DoNotForceEllipsis, ForceEllipsis };

 class RootInlineBox : public InlineFlowBox {
  public:
   explicit RootInlineBox(LineLayoutItem);

   void Destroy() final;

   bool IsRootInlineBox() const final { return true; }

   void DetachEllipsisBox();

   RootInlineBox* NextRootBox() const {
     return static_cast<RootInlineBox*>(next_line_box_);
   }
   RootInlineBox* PrevRootBox() const {
     return static_cast<RootInlineBox*>(prev_line_box_);
   }

   void Move(const LayoutSize&) final;

   LayoutUnit LineTop() const { return line_top_; }
   LayoutUnit LineBottom() const { return line_bottom_; }

   LayoutUnit LineTopWithLeading() const { return line_top_with_leading_; }
   LayoutUnit LineBottomWithLeading() const { return line_bottom_with_leading_; }

   LayoutUnit PaginationStrut() const { return pagination_strut_; }
   void SetPaginationStrut(LayoutUnit strut) { pagination_strut_ = strut; }

   LayoutUnit SelectionTop() const;
   LayoutUnit SelectionBottom() const;
   LayoutUnit SelectionHeight() const {
     return (SelectionBottom() - SelectionTop()).ClampNegativeToZero();
   }

   LayoutUnit BlockDirectionPointInLine() const;

   LayoutUnit AlignBoxesInBlockDirection(LayoutUnit height_of_block,
                                         GlyphOverflowAndFallbackFontsMap&,
                                         VerticalPositionCache&);
   void SetLineTopBottomPositions(
       LayoutUnit top,
       LayoutUnit bottom,
       LayoutUnit top_with_leading,
       LayoutUnit bottom_with_leading,
       LayoutUnit selection_bottom = LayoutUnit::Min()) {
     line_top_ = top;
     line_bottom_ = bottom;
     line_top_with_leading_ = top_with_leading;
     line_bottom_with_leading_ = bottom_with_leading;
     selection_bottom_ =
         selection_bottom == LayoutUnit::Min() ? bottom : selection_bottom;
   }

   LineBoxList* LineBoxes() const final;

   LineLayoutItem LineBreakObj() const { return line_break_obj_; }
   BidiStatus LineBreakBidiStatus() const;
   void SetLineBreakInfo(LineLayoutItem, unsigned break_pos, const BidiStatus&);

   unsigned LineBreakPos() const { return line_break_pos_; }
   void SetLineBreakPos(unsigned p) { line_break_pos_ = p; }

   using InlineBox::EndsWithBreak;
   using InlineBox::SetEndsWithBreak;

   void ChildRemoved(InlineBox*);

   bool LineCanAccommodateEllipsis(bool ltr,
                                   LayoutUnit block_edge,
                                   LayoutUnit line_box_edge,
                                   LayoutUnit ellipsis_width);
   // Return the truncatedWidth, the width of the truncated text + ellipsis.
   LayoutUnit PlaceEllipsis(const AtomicString& ellipsis_str,
                            bool ltr,
                            LayoutUnit block_left_edge,
                            LayoutUnit block_right_edge,
                            LayoutUnit ellipsis_width,
                            LayoutUnit logical_left_offset,
                            InlineBox** found_box,
                            ForceEllipsisOnLine = DoNotForceEllipsis);
   // Return the position of the EllipsisBox or -1.
   LayoutUnit PlaceEllipsisBox(bool ltr,
                               LayoutUnit block_left_edge,
                               LayoutUnit block_right_edge,
                               LayoutUnit ellipsis_width,
                               LayoutUnit& truncated_width,
                               InlineBox** found_box,
                               LayoutUnit logical_left_offset) final;

   using InlineBox::HasEllipsisBox;
   EllipsisBox* GetEllipsisBox() const;

   void ClearTruncation() final;

   LayoutUnit BaselinePosition(FontBaseline baseline_type) const final;
   LayoutUnit LineHeight() const final;

   void Paint(const PaintInfo&,
              const LayoutPoint&,
              LayoutUnit line_top,
              LayoutUnit line_bottom) const override;
   bool NodeAtPoint(HitTestResult&,
                    const HitTestLocation&,
                    const PhysicalOffset& accumulated_offset,
                    LayoutUnit line_top,
                    LayoutUnit line_bottom) override;

   bool IsSelected() const final;
   InlineBox* FirstSelectedBox() const;
   InlineBox* LastSelectedBox() const;

   LineLayoutBlockFlow Block() const;

   const LayoutObject* ClosestLeafChildForPoint(const LayoutPoint&,
                                                bool only_editable_leaves) const;
   InlineBox* ClosestLeafChildForLogicalLeftPosition(
       LayoutUnit,
       bool only_editable_leaves = false) const;

   void AppendFloat(LayoutBox* floating_box) {
     DCHECK(!IsDirty());
     if (floats_)
       floats_->push_back(floating_box);
     else
       floats_ = std::make_unique<Vector<LayoutBox*>>(1, floating_box);
   }

   Vector<LayoutBox*>* FloatsPtr() {
     DCHECK(!IsDirty());
     return floats_.get();
   }

   void ExtractLineBoxFromLayoutObject() final;
   void AttachLineBoxToLayoutObject() final;
   void RemoveLineBoxFromLayoutObject() final;

   FontBaseline BaselineType() const {
     return static_cast<FontBaseline>(baseline_type_);
   }

   bool HasAnnotationsBefore() const { return has_annotations_before_; }
   bool HasAnnotationsAfter() const { return has_annotations_after_; }

   LayoutRect PaddedLayoutOverflowRect(LayoutUnit end_padding) const;

   void AscentAndDescentForBox(InlineBox*,
                               GlyphOverflowAndFallbackFontsMap&,
                               LayoutUnit& ascent,
                               LayoutUnit& descent,
                               bool& affects_ascent,
                               bool& affects_descent) const;
   LayoutUnit VerticalPositionForBox(InlineBox*, VerticalPositionCache&);
   bool IncludeLeadingForBox(InlineBox*) const;

   LayoutUnit LogicalTopVisualOverflow() const {
     return InlineFlowBox::LogicalTopVisualOverflow(LineTop());
   }
   LayoutUnit LogicalBottomVisualOverflow() const {
     return InlineFlowBox::LogicalBottomVisualOverflow(LineBottom());
   }
   LayoutUnit LogicalTopLayoutOverflow() const {
     return InlineFlowBox::LogicalTopLayoutOverflow(LineTop());
   }
   LayoutUnit LogicalBottomLayoutOverflow() const {
     return InlineFlowBox::LogicalBottomLayoutOverflow(LineBottom());
   }

   typedef void (*CustomInlineBoxRangeReverse)(
       Vector<InlineBox*>::iterator first,
       Vector<InlineBox*>::iterator last);
   void CollectLeafBoxesInLogicalOrder(
       Vector<InlineBox*>&,
       CustomInlineBoxRangeReverse custom_reverse_implementation =
           nullptr) const;

   const InlineBox* GetLogicalStartNonPseudoBox() const;
   const InlineBox* GetLogicalEndNonPseudoBox() const;

   const char* BoxName() const override;

  private:
   LayoutUnit BeforeAnnotationsAdjustment() const;

   // This folds into the padding at the end of InlineFlowBox on 64-bit.
   unsigned line_break_pos_;

   // Where this line ended.  The exact object and the position within that
   // object are stored so that we can create an InlineIterator beginning just
   // after the end of this line.
   LineLayoutItem line_break_obj_;
   scoped_refptr<BidiContext> line_break_context_;

   // Floats hanging off the line are pushed into this vector during layout. It
   // is only good for as long as the line has not been marked dirty.
   std::unique_ptr<Vector<LayoutBox*>> floats_;

   LayoutUnit line_top_;
   LayoutUnit line_bottom_;
   LayoutUnit line_top_with_leading_;
   LayoutUnit line_bottom_with_leading_;
   LayoutUnit selection_bottom_;
   LayoutUnit pagination_strut_;
 };

 }  // namespace blink

 #endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_ROOT_INLINE_BOX_H_
	/*
	* Copyright (C) 2003, 2006, 2007, 2008 Apple Inc. All rights reserved.
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public License
	* along with this library; see the file COPYING.LIB. If not, write to
	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*
	*/

	#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_ROOT_INLINE_BOX_H_
	#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_ROOT_INLINE_BOX_H_

	#include <memory>

	#include "third_party/blink/renderer/core/layout/api/line_layout_item.h"
	#include "third_party/blink/renderer/core/layout/line/inline_flow_box.h"
	#include "third_party/blink/renderer/platform/text/bidi_context.h"

	namespace blink {

	class EllipsisBox;
	class HitTestResult;
	class LineLayoutBlockFlow;

	struct BidiStatus;

	enum ForceEllipsisOnLine { DoNotForceEllipsis, ForceEllipsis };

	class RootInlineBox : public InlineFlowBox {
	public:
	explicit RootInlineBox(LineLayoutItem);

	void Destroy() final;

	bool IsRootInlineBox() const final { return true; }

	void DetachEllipsisBox();

	RootInlineBox* NextRootBox() const {
	return static_cast<RootInlineBox*>(next_line_box_);
	}
	RootInlineBox* PrevRootBox() const {
	return static_cast<RootInlineBox*>(prev_line_box_);
	}

	void Move(const LayoutSize&) final;

	LayoutUnit LineTop() const { return line_top_; }
	LayoutUnit LineBottom() const { return line_bottom_; }

	LayoutUnit LineTopWithLeading() const { return line_top_with_leading_; }
	LayoutUnit LineBottomWithLeading() const { return line_bottom_with_leading_; }

	LayoutUnit PaginationStrut() const { return pagination_strut_; }
	void SetPaginationStrut(LayoutUnit strut) { pagination_strut_ = strut; }

	LayoutUnit SelectionTop() const;
	LayoutUnit SelectionBottom() const;
	LayoutUnit SelectionHeight() const {
	return (SelectionBottom() - SelectionTop()).ClampNegativeToZero();
	}

	LayoutUnit BlockDirectionPointInLine() const;

	LayoutUnit AlignBoxesInBlockDirection(LayoutUnit height_of_block,
	GlyphOverflowAndFallbackFontsMap&,
	VerticalPositionCache&);
	void SetLineTopBottomPositions(
	LayoutUnit top,
	LayoutUnit bottom,
	LayoutUnit top_with_leading,
	LayoutUnit bottom_with_leading,
	LayoutUnit selection_bottom = LayoutUnit::Min()) {
	line_top_ = top;
	line_bottom_ = bottom;
	line_top_with_leading_ = top_with_leading;
	line_bottom_with_leading_ = bottom_with_leading;
	selection_bottom_ =
	selection_bottom == LayoutUnit::Min() ? bottom : selection_bottom;
	}

	LineBoxList* LineBoxes() const final;

	LineLayoutItem LineBreakObj() const { return line_break_obj_; }
	BidiStatus LineBreakBidiStatus() const;
	void SetLineBreakInfo(LineLayoutItem, unsigned break_pos, const BidiStatus&);

	unsigned LineBreakPos() const { return line_break_pos_; }
	void SetLineBreakPos(unsigned p) { line_break_pos_ = p; }

	using InlineBox::EndsWithBreak;
	using InlineBox::SetEndsWithBreak;

	void ChildRemoved(InlineBox*);

	bool LineCanAccommodateEllipsis(bool ltr,
	LayoutUnit block_edge,
	LayoutUnit line_box_edge,
	LayoutUnit ellipsis_width);
	// Return the truncatedWidth, the width of the truncated text + ellipsis.
	LayoutUnit PlaceEllipsis(const AtomicString& ellipsis_str,
	bool ltr,
	LayoutUnit block_left_edge,
	LayoutUnit block_right_edge,
	LayoutUnit ellipsis_width,
	LayoutUnit logical_left_offset,
	InlineBox** found_box,
	ForceEllipsisOnLine = DoNotForceEllipsis);
	// Return the position of the EllipsisBox or -1.
	LayoutUnit PlaceEllipsisBox(bool ltr,
	LayoutUnit block_left_edge,
	LayoutUnit block_right_edge,
	LayoutUnit ellipsis_width,
	LayoutUnit& truncated_width,
	InlineBox** found_box,
	LayoutUnit logical_left_offset) final;

	using InlineBox::HasEllipsisBox;
	EllipsisBox* GetEllipsisBox() const;

	void ClearTruncation() final;

	LayoutUnit BaselinePosition(FontBaseline baseline_type) const final;
	LayoutUnit LineHeight() const final;

	void Paint(const PaintInfo&,
	const LayoutPoint&,
	LayoutUnit line_top,
	LayoutUnit line_bottom) const override;
	bool NodeAtPoint(HitTestResult&,
	const HitTestLocation&,
	const PhysicalOffset& accumulated_offset,
	LayoutUnit line_top,
	LayoutUnit line_bottom) override;

	bool IsSelected() const final;
	InlineBox* FirstSelectedBox() const;
	InlineBox* LastSelectedBox() const;

	LineLayoutBlockFlow Block() const;

	const LayoutObject* ClosestLeafChildForPoint(const LayoutPoint&,
	bool only_editable_leaves) const;
	InlineBox* ClosestLeafChildForLogicalLeftPosition(
	LayoutUnit,
	bool only_editable_leaves = false) const;

	void AppendFloat(LayoutBox* floating_box) {
	DCHECK(!IsDirty());
	if (floats_)
	floats_->push_back(floating_box);
	else
	floats_ = std::make_unique<Vector<LayoutBox*>>(1, floating_box);
	}

	Vector<LayoutBox> FloatsPtr() {
	DCHECK(!IsDirty());
	return floats_.get();
	}

	void ExtractLineBoxFromLayoutObject() final;
	void AttachLineBoxToLayoutObject() final;
	void RemoveLineBoxFromLayoutObject() final;

	FontBaseline BaselineType() const {
	return static_cast<FontBaseline>(baseline_type_);
	}

	bool HasAnnotationsBefore() const { return has_annotations_before_; }
	bool HasAnnotationsAfter() const { return has_annotations_after_; }

	LayoutRect PaddedLayoutOverflowRect(LayoutUnit end_padding) const;

	void AscentAndDescentForBox(InlineBox*,
	GlyphOverflowAndFallbackFontsMap&,
	LayoutUnit& ascent,
	LayoutUnit& descent,
	bool& affects_ascent,
	bool& affects_descent) const;
	LayoutUnit VerticalPositionForBox(InlineBox*, VerticalPositionCache&);
	bool IncludeLeadingForBox(InlineBox*) const;

	LayoutUnit LogicalTopVisualOverflow() const {
	return InlineFlowBox::LogicalTopVisualOverflow(LineTop());
	}
	LayoutUnit LogicalBottomVisualOverflow() const {
	return InlineFlowBox::LogicalBottomVisualOverflow(LineBottom());
	}
	LayoutUnit LogicalTopLayoutOverflow() const {
	return InlineFlowBox::LogicalTopLayoutOverflow(LineTop());
	}
	LayoutUnit LogicalBottomLayoutOverflow() const {
	return InlineFlowBox::LogicalBottomLayoutOverflow(LineBottom());
	}

	typedef void (*CustomInlineBoxRangeReverse)(
	Vector<InlineBox*>::iterator first,
	Vector<InlineBox*>::iterator last);
	void CollectLeafBoxesInLogicalOrder(
	Vector<InlineBox*>&,
	CustomInlineBoxRangeReverse custom_reverse_implementation =
	nullptr) const;

	const InlineBox* GetLogicalStartNonPseudoBox() const;
	const InlineBox* GetLogicalEndNonPseudoBox() const;

	const char* BoxName() const override;

	private:
	LayoutUnit BeforeAnnotationsAdjustment() const;

	// This folds into the padding at the end of InlineFlowBox on 64-bit.
	unsigned line_break_pos_;

	// Where this line ended. The exact object and the position within that
	// object are stored so that we can create an InlineIterator beginning just
	// after the end of this line.
	LineLayoutItem line_break_obj_;
	scoped_refptr<BidiContext> line_break_context_;

	// Floats hanging off the line are pushed into this vector during layout. It
	// is only good for as long as the line has not been marked dirty.
	std::unique_ptr<Vector<LayoutBox*>> floats_;

	LayoutUnit line_top_;
	LayoutUnit line_bottom_;
	LayoutUnit line_top_with_leading_;
	LayoutUnit line_bottom_with_leading_;
	LayoutUnit selection_bottom_;
	LayoutUnit pagination_strut_;
	};

	} // namespace blink

	#endif // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_ROOT_INLINE_BOX_H_