| // Copyright 2017 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 InlineBoxTraversal_h |
| #define InlineBoxTraversal_h |
| |
| #include "platform/wtf/Allocator.h" |
| |
| namespace blink { |
| |
| class InlineBox; |
| |
| // This class provides common traveral functions on list of |InlineBox|. |
| class InlineBoxTraversal final { |
| STATIC_ONLY(InlineBoxTraversal); |
| |
| public: |
| // TODO(yosin): We should take |bidi_level| from |InlineBox::BidiLevel()|, |
| // once all call sites satisfy it. |
| |
| // Returns |InlineBox| which is less than or equal to |bidi_level| of |
| // left/right of specified |InlineBox|. |
| static InlineBox* FindLeftBidiRun(const InlineBox&, unsigned bidi_level); |
| static InlineBox* FindRightBidiRun(const InlineBox&, unsigned bidi_level); |
| |
| // Find left boundary variations |
| static InlineBox* FindLeftBoundaryOfBidiRunIgnoringLineBreak( |
| const InlineBox&, |
| unsigned bidi_level); |
| static InlineBox* FindLeftBoundaryOfEntireBidiRun(const InlineBox&, |
| unsigned bidi_level); |
| static InlineBox* FindLeftBoundaryOfEntireBidiRunIgnoringLineBreak( |
| const InlineBox&, |
| unsigned bidi_level); |
| |
| // Find right boundary variations |
| static InlineBox* FindRightBoundaryOfBidiRunIgnoringLineBreak( |
| const InlineBox&, |
| unsigned bidi_level); |
| static InlineBox* FindRightBoundaryOfEntireBidiRun(const InlineBox&, |
| unsigned bidi_level); |
| static InlineBox* FindRightBoundaryOfEntireBidiRunIgnoringLineBreak( |
| const InlineBox&, |
| unsigned bidi_level); |
| }; |
| |
| } // namespace blink |
| |
| #endif // InlineBoxTraversal_h |
