class/System.Drawing/System.Drawing/FontFamily.cs

   1 //
   2 // System.Drawing.FontFamily.cs
   3 //
   4 // Author:
   5 //   Dennis Hayes (dennish@Raytek.com)
   6 //   Alexandre Pigolkine (pigolkine@gmx.de)
   7 //   Peter Dennis Bartok (pbartok@novell.com)
   8 //
   9 // Copyright (C) 2002/2004 Ximian, Inc http://www.ximian.com
  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 using System.Drawing.Text;
  33 using System.Text;
  34 using System.Runtime.InteropServices;
  35
  36 namespace System.Drawing {
  37
  38         public sealed class FontFamily : MarshalByRefObject, IDisposable
  39         {
  40
  41                 //static private FontFamily genericMonospace;
  42                 //static private FontFamily genericSansSerif;
  43                 //static private FontFamily genericSerif;
  44                 private string name;
  45                 private IntPtr nativeFontFamily = IntPtr.Zero;
  46
  47                 internal FontFamily(IntPtr fntfamily)
  48                 {
  49                         nativeFontFamily = fntfamily;
  50                 }
  51
  52                 internal void refreshName()
  53                 {
  54                         StringBuilder sb;
  55
  56                         if (nativeFontFamily == IntPtr.Zero)
  57                                 return;
  58
  59                         sb = new StringBuilder (GDIPlus.FACESIZE);
  60                         Status status = GDIPlus.GdipGetFamilyName (nativeFontFamily, sb, 0);
  61                         GDIPlus.CheckStatus (status);
  62                         name = sb.ToString();
  63                 }
  64
  65                 ~FontFamily()
  66                 {
  67                         Dispose ();
  68                 }
  69
  70                 internal IntPtr NativeObject
  71                 {
  72                         get
  73                         {
  74                                 return nativeFontFamily;
  75                         }
  76                 }
  77
  78                 public FontFamily (GenericFontFamilies genericFamily)
  79                 {
  80                         Status status;
  81                         switch (genericFamily) {
  82                                 case GenericFontFamilies.SansSerif:
  83                                         status = GDIPlus.GdipGetGenericFontFamilySansSerif (out nativeFontFamily);
  84                                         break;
  85                                 case GenericFontFamilies.Serif:
  86                                         status = GDIPlus.GdipGetGenericFontFamilySerif (out nativeFontFamily);
  87                                         break;
  88                                 case GenericFontFamilies.Monospace:
  89                                 default:        // Undocumented default
  90                                         status = GDIPlus.GdipGetGenericFontFamilyMonospace (out nativeFontFamily);
  91                                         break;
  92                         }
  93                         GDIPlus.CheckStatus (status);
  94                 }
  95
  96                 public FontFamily(string name) : this (name, null)
  97                 {
  98                 }
  99
 100                 public FontFamily (string name, FontCollection fontCollection)
 101                 {
 102                         IntPtr handle = (fontCollection == null) ? IntPtr.Zero : fontCollection.nativeFontCollection;
 103                         Status status = GDIPlus.GdipCreateFontFamilyFromName (name, handle, out nativeFontFamily);
 104                         GDIPlus.CheckStatus (status);
 105                 }
 106
 107                 public string Name {
 108                         get {
 109                                 if (nativeFontFamily == IntPtr.Zero)
 110                                         throw new ArgumentException ("Name", Locale.GetText ("Object was disposed."));
 111                                 if (name == null)
 112                                         refreshName ();
 113                                 return name;
 114                         }
 115                 }
 116
 117                 public static FontFamily GenericMonospace {
 118                         get { return new FontFamily (GenericFontFamilies.Monospace); }
 119                 }
 120
 121                 public static FontFamily GenericSansSerif {
 122                         get { return new FontFamily (GenericFontFamilies.SansSerif); }
 123                 }
 124
 125                 public static FontFamily GenericSerif {
 126                         get { return new FontFamily (GenericFontFamilies.Serif); }
 127                 }
 128
 129                 public int GetCellAscent (FontStyle style)
 130                 {
 131                         short outProperty;
 132                         Status status = GDIPlus.GdipGetCellAscent (nativeFontFamily, (int)style, out outProperty);
 133                         GDIPlus.CheckStatus (status);
 134
 135                         return (int) outProperty;
 136                 }
 137
 138                 public int GetCellDescent (FontStyle style)
 139                 {
 140                         short outProperty;
 141                         Status status = GDIPlus.GdipGetCellDescent (nativeFontFamily, (int)style, out outProperty);
 142                         GDIPlus.CheckStatus (status);
 143
 144                         return (int) outProperty;
 145                 }
 146
 147                 public int GetEmHeight (FontStyle style)
 148                 {
 149                         short outProperty;
 150                         Status status = GDIPlus.GdipGetEmHeight (nativeFontFamily, (int)style, out outProperty);
 151                         GDIPlus.CheckStatus (status);
 152
 153                         return (int) outProperty;
 154                 }
 155
 156                 public int GetLineSpacing (FontStyle style)
 157                 {
 158                         short outProperty;
 159                         Status status = GDIPlus.GdipGetLineSpacing (nativeFontFamily, (int)style, out outProperty);
 160                         GDIPlus.CheckStatus (status);
 161
 162                         return (int) outProperty;
 163                 }
 164
 165                 [MonoDocumentationNote ("When used with libgdiplus this method always return true (styles are created on demand).")]
 166                 public bool IsStyleAvailable (FontStyle style)
 167                 {
 168                         bool outProperty;
 169                         Status status = GDIPlus.GdipIsStyleAvailable (nativeFontFamily, (int)style, out outProperty);
 170                         GDIPlus.CheckStatus (status);
 171
 172                         return outProperty;
 173                 }
 174
 175                 public void Dispose ()
 176                 {
 177                         if (nativeFontFamily != IntPtr.Zero) {
 178                                 Status status = GDIPlus.GdipDeleteFontFamily (nativeFontFamily);
 179                                 nativeFontFamily = IntPtr.Zero;
 180                                 GC.SuppressFinalize (this);
 181                                 // check the status code (throw) at the last step
 182                                 GDIPlus.CheckStatus (status);
 183                         }
 184                 }
 185
 186                 public override bool Equals (object obj)
 187                 {
 188                         FontFamily o = (obj as FontFamily);
 189                         if (o == null)
 190                                 return false;
 191
 192                         return (Name == o.Name);
 193                 }
 194
 195                 public override int GetHashCode ()
 196                 {
 197                         return Name.GetHashCode ();
 198                 }
 199
 200
 201                 public static FontFamily[] Families {
 202                         get { return new InstalledFontCollection ().Families; }
 203                 }
 204
 205                 public static FontFamily[] GetFamilies (Graphics graphics)
 206                 {
 207                         if (graphics == null)
 208                                 throw new ArgumentNullException ("graphics");
 209
 210                         InstalledFontCollection fntcol = new InstalledFontCollection ();
 211                         return fntcol.Families;
 212                 }
 213
 214                 [MonoLimitation ("The language parameter is ignored. We always return the name using the default system language.")]
 215                 public string GetName (int language)
 216                 {
 217                         return Name;
 218                 }
 219
 220                 public override string ToString ()
 221                 {
 222                         return String.Concat ("[FontFamily: Name=", Name, "]");
 223                 }
 224         }
 225 }
 226