gfx/src/thebes/nsSystemFontsMac.cpp

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  * ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
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  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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  13  * License.
  14  *
  15  * The Original Code is Mozilla Corporation code.
  16  *
  17  * The Initial Developer of the Original Code is Mozilla Corporation.
  18  * Portions created by the Initial Developer are Copyright (C) 2006
  19  * the Initial Developer. All Rights Reserved.
  20  *
  21  * Contributor(s):
  22  *   Vladimir Vukicevic <vladimir@pobox.com>
  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either the GNU General Public License Version 2 or later (the "GPL"), or
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  36  * ***** END LICENSE BLOCK ***** */
  37
  38 #include <Carbon/Carbon.h>
  39
  40 #include "nsSystemFontsMac.h"
  41
  42 nsSystemFontsMac::nsSystemFontsMac()
  43 {
  44 }
  45
  46 // helper function to get the system font for a specific script
  47 #define FONTNAME_MAX_UNICHRS sizeof(fontName255) * 2
  48 nsresult
  49 GetSystemFontForScript(ThemeFontID aFontID, ScriptCode aScriptCode,
  50                        nsAFlatString& aFontName, SInt16& aFontSize,
  51                        Style& aFontStyle)
  52 {
  53     Str255 fontName255;
  54     ::GetThemeFont(aFontID, aScriptCode, fontName255, &aFontSize, &aFontStyle);
  55     if (fontName255[0] == 255) {
  56         NS_WARNING("Too long fong name (> 254 chrs)");
  57         return NS_ERROR_FAILURE;
  58     }
  59     fontName255[fontName255[0]+1] = 0;
  60
  61     OSStatus err;
  62
  63     // the theme font could contains font name in different encoding.
  64     // we need to covert them to unicode according to the font's text encoding.
  65     TECObjectRef converter = 0;
  66     TextEncoding unicodeEncoding =
  67         ::CreateTextEncoding(kTextEncodingUnicodeDefault,
  68                              kTextEncodingDefaultVariant,
  69                              kTextEncodingDefaultFormat);
  70
  71     FMFontFamily fontFamily;
  72     TextEncoding fontEncoding = 0;
  73     fontFamily = ::FMGetFontFamilyFromName(fontName255);
  74
  75     err = ::FMGetFontFamilyTextEncoding(fontFamily, &fontEncoding);
  76     if (err != noErr) {
  77         NS_WARNING("Could not get the encoding for the font.");
  78         return NS_ERROR_FAILURE;
  79     }
  80
  81     err = ::TECCreateConverter(&converter, fontEncoding, unicodeEncoding);
  82     if (err != noErr) {
  83         NS_WARNING("Could not create the converter.");
  84         return NS_ERROR_FAILURE;
  85     }
  86
  87     PRUnichar unicodeFontName[FONTNAME_MAX_UNICHRS + 1];
  88     ByteCount actualInputLength, actualOutputLength;
  89     err = ::TECConvertText(converter, &fontName255[1], fontName255[0],
  90                            &actualInputLength,
  91                            (TextPtr)unicodeFontName,
  92                            FONTNAME_MAX_UNICHRS * sizeof(PRUnichar),
  93                            &actualOutputLength);
  94
  95     if (err != noErr) {
  96         NS_WARNING("Could not convert the font name.");
  97         return NS_ERROR_FAILURE;
  98     }
  99
 100     ::TECDisposeConverter(converter);
 101
 102     unicodeFontName[actualOutputLength / sizeof(PRUnichar)] = PRUnichar('\0');
 103     aFontName = nsDependentString(unicodeFontName);
 104     return NS_OK;
 105 }
 106
 107 nsresult
 108 nsSystemFontsMac::GetSystemFont(nsSystemFontID aID, nsString *aFontName,
 109                                 gfxFontStyle *aFontStyle) const
 110 {
 111     nsresult rv;
 112
 113     // hack for now
 114     if (aID == eSystemFont_Window ||
 115         aID == eSystemFont_Document)
 116     {
 117         aFontStyle->style       = FONT_STYLE_NORMAL;
 118         aFontStyle->weight      = FONT_WEIGHT_NORMAL;
 119
 120         aFontName->AssignLiteral("sans-serif");
 121         aFontStyle->size = 14;
 122         aFontStyle->systemFont = PR_TRUE;
 123
 124         return NS_OK;
 125     }
 126
 127     ThemeFontID fontID = kThemeViewsFont;
 128     switch (aID) {
 129         // css2
 130         case eSystemFont_Caption:       fontID = kThemeSystemFont;         break;
 131         case eSystemFont_Icon:          fontID = kThemeViewsFont;          break;
 132         case eSystemFont_Menu:          fontID = kThemeSystemFont;         break;
 133         case eSystemFont_MessageBox:    fontID = kThemeSmallSystemFont;    break;
 134         case eSystemFont_SmallCaption:  fontID = kThemeSmallEmphasizedSystemFont;  break;
 135         case eSystemFont_StatusBar:     fontID = kThemeSmallSystemFont;    break;
 136         // css3
 137         //case eSystemFont_Window:      = 'sans-serif'
 138         //case eSystemFont_Document:    = 'sans-serif'
 139         case eSystemFont_Workspace:     fontID = kThemeViewsFont;          break;
 140         case eSystemFont_Desktop:       fontID = kThemeViewsFont;          break;
 141         case eSystemFont_Info:          fontID = kThemeViewsFont;          break;
 142         case eSystemFont_Dialog:        fontID = kThemeSystemFont;         break;
 143         case eSystemFont_Button:        fontID = kThemeSmallSystemFont;    break;
 144         case eSystemFont_PullDownMenu:  fontID = kThemeMenuItemFont;       break;
 145         case eSystemFont_List:          fontID = kThemeSmallSystemFont;    break;
 146         case eSystemFont_Field:         fontID = kThemeSmallSystemFont;    break;
 147         // moz
 148         case eSystemFont_Tooltips:      fontID = kThemeSmallSystemFont;    break;
 149         case eSystemFont_Widget:        fontID = kThemeSmallSystemFont;    break;
 150         default:
 151             // should never hit this
 152             return NS_ERROR_FAILURE;
 153     }
 154
 155     nsAutoString fontName;
 156     SInt16 fontSize;
 157     Style fontStyle;
 158
 159     ScriptCode sysScript = GetScriptManagerVariable(smSysScript);
 160     rv = GetSystemFontForScript(fontID, smRoman, fontName, fontSize, fontStyle);
 161     if (NS_FAILED(rv))
 162         fontName = NS_LITERAL_STRING("Lucida Grande");
 163
 164     if (sysScript != smRoman) {
 165         SInt16 localFontSize;
 166         Style localFontStyle;
 167         nsAutoString localSysFontName;
 168         rv = GetSystemFontForScript(fontID, sysScript,
 169                                     localSysFontName,
 170                                     localFontSize, localFontStyle);
 171         if (NS_SUCCEEDED(rv) && !fontName.Equals(localSysFontName)) {
 172             fontName += NS_LITERAL_STRING(",") + localSysFontName;
 173             fontSize = localFontSize;
 174             fontStyle = localFontStyle;
 175         }
 176     }
 177
 178     *aFontName = fontName;
 179     aFontStyle->size = gfxFloat(fontSize);
 180
 181     if (fontStyle & bold)
 182         aFontStyle->weight = FONT_WEIGHT_BOLD;
 183     if (fontStyle & italic)
 184         aFontStyle->style = FONT_STYLE_ITALIC;
 185
 186     aFontStyle->systemFont = PR_TRUE;
 187
 188     return NS_OK;
 189 }