third_party/WebKit/Source/core/layout/LayoutThemeFontProviderLinux.cpp

   1 /*
   2  * Copyright (C) 2012 Google 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 #include "config.h"
  27 #include "core/layout/LayoutThemeFontProvider.h"
  28
  29 #include "core/CSSValueKeywords.h"
  30 #include "platform/fonts/FontDescription.h"
  31 #include "wtf/StdLibExtras.h"
  32 #include "wtf/text/WTFString.h"
  33
  34 namespace blink {
  35
  36 // static
  37 void LayoutThemeFontProvider::setDefaultFontSize(int fontSize)
  38 {
  39     s_defaultFontSize = static_cast<float>(fontSize);
  40 }
  41
  42 // static
  43 void LayoutThemeFontProvider::systemFont(CSSValueID systemFontID, FontStyle& fontStyle, FontWeight& fontWeight, float& fontSize, AtomicString& fontFamily)
  44 {
  45     fontWeight = FontWeightNormal;
  46     fontStyle = FontStyleNormal;
  47     fontSize = s_defaultFontSize;
  48     fontFamily = defaultGUIFont();
  49
  50     switch (systemFontID) {
  51     case CSSValueWebkitMiniControl:
  52     case CSSValueWebkitSmallControl:
  53     case CSSValueWebkitControl:
  54         // Why 2 points smaller? Because that's what Gecko does. Note that we
  55         // are assuming a 96dpi screen, which is the default that we use on
  56         // Windows.
  57         static const float pointsPerInch = 72.0f;
  58         static const float pixelsPerInch = 96.0f;
  59         fontSize -= (2.0f / pointsPerInch) * pixelsPerInch;
  60         break;
  61     default:
  62         break;
  63     }
  64 }
  65
  66 } // namespace blink