class/System.Drawing/System.Drawing.Text/FontCollection.cs

   1 //
   2 // System.Drawing.Text.FontCollection.cs
   3 //
   4 // (C) 2002 Ximian, Inc.  http://www.ximian.com
   5 // Author: Everaldo Canuto everaldo.canuto@bol.com.br
   6 //              Sanjay Gupta (gsanjay@novell.com)
   7 //              Peter Dennis Bartok (pbartok@novell.com)
   8 //
   9 //
  10 // Copyright (C) 2004 - 2006 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 namespace System.Drawing.Text {
  33
  34         public abstract class FontCollection : IDisposable {
  35
  36                 internal IntPtr nativeFontCollection = IntPtr.Zero;
  37
  38                 internal FontCollection ()
  39                 {
  40                 }
  41
  42                 // methods
  43                 public void Dispose()
  44                 {
  45                         Dispose (true);
  46                         GC.SuppressFinalize (true);
  47                 }
  48
  49                 protected virtual void Dispose (bool disposing)
  50                 {
  51                         // DO NOT FREE FROM HERE
  52                         // FIXME: InstalledFontCollection cannot be freed safely and will leak one time
  53                         // (inside libgdiplus). MS has a similar behaviour (but probably doesn't leak)
  54                 }
  55
  56                 // properties
  57                 public FontFamily[] Families
  58                 {
  59                         get {
  60                                 int found;
  61                                 int returned = 0;
  62                                 Status status;
  63                                 FontFamily[] families;
  64                                 IntPtr[] result;
  65
  66                                 // MS doesn't throw ObjectDisposedException in this case
  67                                 if (nativeFontCollection == IntPtr.Zero)
  68                                         throw new ArgumentException (Locale.GetText ("Collection was disposed."));
  69
  70                                 status = GDIPlus.GdipGetFontCollectionFamilyCount (nativeFontCollection, out found);
  71                                 GDIPlus.CheckStatus (status);
  72                                 if (found == 0)
  73                                         return new FontFamily [0];
  74
  75                                 result = new IntPtr[found];
  76                                 status = GDIPlus.GdipGetFontCollectionFamilyList (nativeFontCollection, found, result, out returned);
  77
  78                                 families = new FontFamily [returned];
  79                                 for ( int i = 0; i < returned ; i++) {
  80                                         families[i] = new FontFamily(result[i]);
  81                                 }
  82
  83                                 return families;
  84                         }
  85                 }
  86
  87                 ~FontCollection()
  88                 {
  89                         Dispose (false);
  90                 }
  91         }
  92 }