ui/gfx/text_constants.h

   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
   8 namespace gfx {
   9
  10 // TODO(msw): Distinguish between logical character stops and glyph stops?
  11 // TODO(msw): Merge with base::i18n::BreakIterator::BreakType.
  12 enum BreakType {
  13   CHARACTER_BREAK = 0, // Stop cursor movement on neighboring characters.
  14   WORD_BREAK,          // Stop cursor movement on nearest word boundaries.
  15   LINE_BREAK,          // Stop cursor movement on line ends as shown on screen.
  16 };
  17
  18 // Horizontal text alignment modes.
  19 enum HorizontalAlignment {
  20   ALIGN_LEFT = 0, // Align the text's left edge with that of its display area.
  21   ALIGN_CENTER,   // Align the text's center with that of its display area.
  22   ALIGN_RIGHT,    // Align the text's right edge with that of its display area.
  23   ALIGN_TO_HEAD,  // Align the text to its first strong character's direction.
  24 };
  25
  26 // The directionality modes used to determine the base text direction.
  27 enum DirectionalityMode {
  28   DIRECTIONALITY_FROM_TEXT = 0, // Use the first strong character's direction.
  29   DIRECTIONALITY_FROM_UI,       // Use the UI locale's text reading direction.
  30   DIRECTIONALITY_FORCE_LTR,     // Use LTR regardless of content or UI locale.
  31   DIRECTIONALITY_FORCE_RTL,     // Use RTL regardless of content or UI locale.
  32 };
  33
  34 // Text styles and adornments.
  35 // TODO(msw): Merge with gfx::Font::FontStyle.
  36 enum TextStyle {
  37   BOLD = 0,
  38   ITALIC,
  39   STRIKE,
  40   DIAGONAL_STRIKE,
  41   UNDERLINE,
  42   NUM_TEXT_STYLES,
  43 };
  44
  45 // Elision behaviors of text that exceeds constrained dimensions.
  46 enum ElideBehavior {
  47   NO_ELIDE = 0, // Do not modify the text, it may overflow its available bounds.
  48   TRUNCATE,     // Do not elide or fade, just truncate at the end of the string.
  49   ELIDE_HEAD,   // Add an ellipsis at the start of the string.
  50   ELIDE_MIDDLE, // Add an ellipsis in the middle of the string.
  51   ELIDE_TAIL,   // Add an ellipsis at the end of the string.
  52   ELIDE_EMAIL,  // Add ellipses to username and domain substrings.
  53   FADE_TAIL,    // Fade the string's end opposite of its horizontal alignment.
  54 };
  55
  56 }  // namespace gfx
  57
  58 #endif  // UI_GFX_TEXT_CONSTANTS_H_