text_constants.h revision 5821806d5e7f356e8fa4b058a389a808ea183019 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef UI_GFX_TEXT_CONSTANTS_H_
6#define UI_GFX_TEXT_CONSTANTS_H_
7
8namespace gfx {
9
10// TODO(msw): Distinguish between logical character stops and glyph stops?
11// TODO(msw): Merge with base::i18n::BreakIterator::BreakType.
12enum BreakType {
13  // Stop cursor movement on neighboring characters.
14  CHARACTER_BREAK = 0,
15  // Stop cursor movement on nearest word boundaries.
16  WORD_BREAK,
17  // Stop cursor movement on line ends as shown on screen.
18  LINE_BREAK,
19};
20
21// Horizontal text alignment modes.
22enum HorizontalAlignment {
23  // Align the text's left edge with that of its display area.
24  ALIGN_LEFT = 0,
25  // Align the text's center with that of its display area.
26  ALIGN_CENTER,
27  // Align the text's right edge with that of its display area.
28  ALIGN_RIGHT,
29};
30
31// The directionality modes used to determine the base text direction.
32enum DirectionalityMode {
33  // Use the first strong character's direction.
34  DIRECTIONALITY_FROM_TEXT = 0,
35  // Use the UI locale's text reading direction.
36  DIRECTIONALITY_FROM_UI,
37  // Use LTR regardless of content or UI locale.
38  DIRECTIONALITY_FORCE_LTR,
39  // Use RTL regardless of content or UI locale.
40  DIRECTIONALITY_FORCE_RTL,
41};
42
43}  // namespace gfx
44
45#endif  // UI_GFX_TEXT_CONSTANTS_H_
46