| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_ABSTRACT_INLINE_TEXT_BOX_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_ABSTRACT_INLINE_TEXT_BOX_H_ |
| |
| #include "base/memory/scoped_refptr.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/dom/range.h" |
| #include "third_party/blink/renderer/core/layout/api/line_layout_text.h" |
| #include "third_party/blink/renderer/core/layout/line/inline_text_box.h" |
| #include "third_party/blink/renderer/platform/wtf/hash_map.h" |
| #include "third_party/blink/renderer/platform/wtf/ref_counted.h" |
| |
| namespace blink { |
| |
| class InlineTextBox; |
| class NGOffsetMapping; |
| |
| // High-level abstraction of InlineTextBox to allow the accessibility module to |
| // get information about InlineTextBoxes without tight coupling. |
| class CORE_EXPORT AbstractInlineTextBox |
| : public RefCounted<AbstractInlineTextBox> { |
| public: |
| struct WordBoundaries { |
| DISALLOW_NEW(); |
| WordBoundaries(int start_index, int end_index) |
| : start_index(start_index), end_index(end_index) {} |
| int start_index; |
| int end_index; |
| }; |
| |
| enum Direction { kLeftToRight, kRightToLeft, kTopToBottom, kBottomToTop }; |
| |
| virtual ~AbstractInlineTextBox(); |
| |
| LineLayoutText GetLineLayoutItem() const { return line_layout_item_; } |
| |
| virtual void Detach(); |
| virtual scoped_refptr<AbstractInlineTextBox> NextInlineTextBox() const = 0; |
| virtual LayoutRect LocalBounds() const = 0; |
| virtual unsigned Len() const = 0; |
| virtual unsigned TextOffsetInContainer(unsigned) const = 0; |
| virtual Direction GetDirection() const = 0; |
| Node* GetNode() const; |
| virtual void CharacterWidths(Vector<float>&) const = 0; |
| void GetWordBoundaries(Vector<WordBoundaries>&) const; |
| virtual String GetText() const = 0; |
| virtual bool IsFirst() const = 0; |
| virtual bool IsLast() const = 0; |
| virtual scoped_refptr<AbstractInlineTextBox> NextOnLine() const = 0; |
| virtual scoped_refptr<AbstractInlineTextBox> PreviousOnLine() const = 0; |
| virtual bool IsLineBreak() const = 0; |
| |
| protected: |
| explicit AbstractInlineTextBox(LineLayoutText line_layout_item); |
| |
| LayoutText* GetFirstLetterPseudoLayoutText() const; |
| |
| private: |
| // Weak ptrs; these are nulled when InlineTextBox::destroy() calls |
| // AbstractInlineTextBox::willDestroy. |
| LineLayoutText line_layout_item_; |
| }; |
| |
| // The implementation of |AbstractInlineTextBox| for legacy layout. |
| // See also |NGAbstractInlineTextBox| for LayoutNG. |
| class CORE_EXPORT LegacyAbstractInlineTextBox final |
| : public AbstractInlineTextBox { |
| private: |
| LegacyAbstractInlineTextBox(LineLayoutText line_layout_item, |
| InlineTextBox* inline_text_box); |
| |
| static scoped_refptr<AbstractInlineTextBox> GetOrCreate(LineLayoutText, |
| InlineTextBox*); |
| static void WillDestroy(InlineTextBox*); |
| |
| friend class LayoutText; |
| friend class InlineTextBox; |
| |
| public: |
| ~LegacyAbstractInlineTextBox() final; |
| |
| private: |
| // Implementations of AbstractInlineTextBox member functions. |
| void Detach() final; |
| scoped_refptr<AbstractInlineTextBox> NextInlineTextBox() const final; |
| LayoutRect LocalBounds() const final; |
| unsigned Len() const final; |
| unsigned TextOffsetInContainer(unsigned offset) const final; |
| Direction GetDirection() const final; |
| void CharacterWidths(Vector<float>&) const final; |
| String GetText() const final; |
| bool IsFirst() const final; |
| bool IsLast() const final; |
| scoped_refptr<AbstractInlineTextBox> NextOnLine() const final; |
| scoped_refptr<AbstractInlineTextBox> PreviousOnLine() const final; |
| bool IsLineBreak() const final; |
| const NGOffsetMapping* GetOffsetMapping() const; |
| |
| InlineTextBox* inline_text_box_; |
| |
| typedef HashMap<InlineTextBox*, scoped_refptr<AbstractInlineTextBox>> |
| InlineToLegacyAbstractInlineTextBoxHashMap; |
| static InlineToLegacyAbstractInlineTextBoxHashMap* |
| g_abstract_inline_text_box_map_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_LINE_ABSTRACT_INLINE_TEXT_BOX_H_ |