third_party/WebKit/Source/platform/fonts/FontOrientation.h

   1 /*
   2  * Copyright (C) 2010 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef FontOrientation_h
  27 #define FontOrientation_h
  28
  29 #include "platform/fonts/Character.h"
  30
  31 namespace blink {
  32
  33 enum class FontOrientation {
  34     // Horizontal; i.e., writing-mode: horizontal-tb
  35     Horizontal = 0,
  36     // Baseline is vertical but use rotated horizontal typography; i.e., writing-mode: vertical-*; text-orientation: sideways-*
  37     VerticalRotated = 1,
  38     // Vertical with upright CJK and rotated non-CJK; i.e., writing-mode: vertical-*, text-orientation: mixed
  39     VerticalMixed = 2,
  40     // Vertical with all upright; i.e., writing-mode: vertical-*, text-orientation: upright
  41     VerticalUpright = 3,
  42
  43     BitCount = 2,
  44
  45     AnyUprightMask = 2,
  46 };
  47
  48 inline bool operator&(FontOrientation value, FontOrientation mask) { return static_cast<unsigned>(value) & static_cast<unsigned>(mask); }
  49 inline bool isVerticalAnyUpright(FontOrientation orientation) { return orientation & FontOrientation::AnyUprightMask; }
  50 inline bool isVerticalNonCJKUpright(FontOrientation orientation) { return orientation == FontOrientation::VerticalUpright; }
  51 inline bool isVerticalUpright(FontOrientation orientation, UChar32 character)
  52 {
  53     return orientation == FontOrientation::VerticalUpright
  54         || (orientation == FontOrientation::VerticalMixed && Character::isUprightInMixedVertical(character));
  55 }
  56 inline bool isVerticalBaseline(FontOrientation orientation) { return orientation != FontOrientation::Horizontal; }
  57
  58 } // namespace blink
  59
  60 #endif // FontOrientation_h