More old files deletion.

ui/gfx/selection_model.h

-// Copyright (c) 2012 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 UI_GFX_SELECTION_MODEL_H_
-#define UI_GFX_SELECTION_MODEL_H_
-
-#include <string>
-
-#include "ui/gfx/gfx_export.h"
-#include "ui/gfx/range/range.h"
-
-namespace gfx {
-
-// VisualCursorDirection and LogicalCursorDirection represent directions of
-// motion of the cursor in BiDi text. The combinations that make sense are:
-//
-//  base::i18n::TextDirection  VisualCursorDirection  LogicalCursorDirection
-//       LEFT_TO_RIGHT             CURSOR_LEFT           CURSOR_BACKWARD
-//       LEFT_TO_RIGHT             CURSOR_RIGHT          CURSOR_FORWARD
-//       RIGHT_TO_LEFT             CURSOR_RIGHT          CURSOR_BACKWARD
-//       RIGHT_TO_LEFT             CURSOR_LEFT           CURSOR_FORWARD
-enum VisualCursorDirection {
-  CURSOR_LEFT,
-  CURSOR_RIGHT
-};
-enum LogicalCursorDirection {
-  CURSOR_BACKWARD,
-  CURSOR_FORWARD
-};
-
-// TODO(xji): publish bidi-editing guide line and replace the place holder.
-// SelectionModel is used to represent the logical selection and visual
-// position of cursor.
-//
-// For bi-directional text, the mapping between visual position and logical
-// position is not one-to-one. For example, logical text "abcDEF" where capital
-// letters stand for Hebrew, the visual display is "abcFED". According to the
-// bidi editing guide (http://bidi-editing-guideline):
-// 1. If pointing to the right half of the cell of a LTR character, the current
-// position must be set after this character and the caret must be displayed
-// after this character.
-// 2. If pointing to the right half of the cell of a RTL character, the current
-// position must be set before this character and the caret must be displayed
-// before this character.
-//
-// Pointing to the right half of 'c' and pointing to the right half of 'D' both
-// set the logical cursor position to 3. But the cursor displayed visually at
-// different places:
-// Pointing to the right half of 'c' displays the cursor right of 'c' as
-// "abc|FED".
-// Pointing to the right half of 'D' displays the cursor right of 'D' as
-// "abcFED|".
-// So, besides the logical selection start point and end point, we need extra
-// information to specify to which character the visual cursor is bound. This
-// is given by a "caret affinity" which is either CURSOR_BACKWARD (indicating
-// the trailing half of the 'c' in this case) or CURSOR_FORWARD (indicating
-// the leading half of the 'D').
-class GFX_EXPORT SelectionModel {
- public:
-  // Create a default SelectionModel to be overwritten later.
-  SelectionModel();
-  // Create a SelectionModel representing a caret |position| without a
-  // selection. The |affinity| is meaningful only when the caret is positioned
-  // between bidi runs that are not visually contiguous: in that case, it
-  // indicates the run to which the caret is attached for display purposes.
-  SelectionModel(size_t position, LogicalCursorDirection affinity);
-  // Create a SelectionModel representing a selection (which may be empty).
-  // The caret position is the end of the range.
-  SelectionModel(const Range& selection, LogicalCursorDirection affinity);
-
-  const Range& selection() const { return selection_; }
-  size_t caret_pos() const { return selection_.end(); }
-  LogicalCursorDirection caret_affinity() const { return caret_affinity_; }
-
-  // WARNING: Generally the selection start should not be changed without
-  // considering the effect on the caret affinity.
-  void set_selection_start(size_t pos) { selection_.set_start(pos); }
-
-  bool operator==(const SelectionModel& sel) const;
-  bool operator!=(const SelectionModel& sel) const { return !(*this == sel); }
-
-  std::string ToString() const;
-
- private:
-  // Logical selection. The logical caret position is the end of the selection.
-  Range selection_;
-
-  // The logical direction from the caret position (selection_.end()) to the
-  // character it is attached to for display purposes. This matters only when
-  // the surrounding characters are not visually contiguous, which happens only
-  // in bidi text (and only at bidi run boundaries). The text is treated as
-  // though it was surrounded on both sides by runs in the dominant text
-  // direction. For example, supposing the dominant direction is LTR and the
-  // logical text is "abcDEF", where DEF is right-to-left text, the visual
-  // cursor will display as follows:
-  //    caret position    CURSOR_BACKWARD affinity    CURSOR_FORWARD affinity
-  //          0                  |abcFED                     |abcFED
-  //          1                  a|bcFED                     a|bcFED
-  //          2                  ab|cFED                     ab|cFED
-  //          3                  abc|FED                     abcFED|
-  //          4                  abcFE|D                     abcFE|D
-  //          5                  abcF|ED                     abcF|ED
-  //          6                  abc|FED                     abcFED|
-  LogicalCursorDirection caret_affinity_;
-};
-
-}  // namespace gfx
-
-#endif  // UI_GFX_SELECTION_MODEL_H_