mcs/class/System.Drawing/System.Drawing/FontConverter.cs

   1 //
   2 // System.Drawing.FontConverter.cs
   3 //
   4 // Authors:
   5 //      Dennis Hayes (dennish@Raytek.com)
   6 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7 //      Ravindra (rkumar@novell.com)
   8 //
   9 // Copyright (C) 2002,2003 Ximian, Inc.  http://www.ximian.com
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Text;
  35 using System.Collections;
  36 using System.ComponentModel;
  37 using System.Globalization;
  38 using System.Drawing.Text;
  39 using System.ComponentModel.Design.Serialization;\r
  40 using System.Reflection;\r
  41
  42 namespace System.Drawing
  43 {
  44         public class FontConverter : TypeConverter
  45         {
  46                 public FontConverter ()
  47                 {
  48                 }
  49
  50                 ~FontConverter ()
  51                 {
  52
  53                 }
  54
  55                 public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
  56                 {
  57                         if (sourceType == typeof (string))
  58                                 return true;
  59
  60                         return base.CanConvertFrom (context, sourceType);
  61                 }
  62
  63                 public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
  64                 {
  65                         if (destinationType == typeof (String))
  66                                 return true;
  67
  68                         if (destinationType == typeof (InstanceDescriptor))
  69                                 return true;
  70
  71                         return base.CanConvertTo (context, destinationType);
  72                 }
  73
  74                 public override object ConvertTo (ITypeDescriptorContext context,
  75                         CultureInfo culture,
  76                         object value,
  77                         Type destinationType)
  78                 {
  79                         if ((destinationType == typeof (string)) && (value is Font)) {
  80                                 Font font = (Font) value;
  81                                 StringBuilder sb = new StringBuilder ();
  82                                 sb.Append (font.Name).Append (", ");
  83                                 sb.Append (font.Size);
  84
  85                                 switch (font.Unit) {
  86                                         // MS throws ArgumentException, if unit is set
  87                                         // to GraphicsUnit.Display
  88                                         // Don't know what to append for GraphicsUnit.Display
  89                                 case GraphicsUnit.Display:
  90                                         sb.Append ("display"); break;
  91
  92                                 case GraphicsUnit.Document:
  93                                         sb.Append ("doc"); break;
  94
  95                                 case GraphicsUnit.Point:
  96                                         sb.Append ("pt"); break;
  97
  98                                 case GraphicsUnit.Inch:
  99                                         sb.Append ("in"); break;
 100
 101                                 case GraphicsUnit.Millimeter:
 102                                         sb.Append ("mm"); break;
 103
 104                                 case GraphicsUnit.Pixel:
 105                                         sb.Append ("px"); break;
 106
 107                                 case GraphicsUnit.World:
 108                                         sb.Append ("world"); break;
 109                                 }
 110
 111                                 if (font.Style != FontStyle.Regular)
 112                                         sb.Append (", style=").Append (font.Style);
 113
 114                                 return sb.ToString ();
 115                         }
 116
 117                         if ((destinationType == typeof (InstanceDescriptor)) && (value is Font)) {
 118                                 Font font = (Font) value;
 119                                 ConstructorInfo met = typeof(Font).GetConstructor (new Type[] {typeof(string), typeof(float), typeof(FontStyle), typeof(GraphicsUnit)});\r
 120                                 object[] args = new object[4];
 121                                 args [0] = font.Name;
 122                                 args [1] = font.Size;
 123                                 args [2] = font.Style;\r
 124                                 args [3] = font.Unit;
 125                                 return new InstanceDescriptor (met, args);
 126                         }
 127
 128                         return base.ConvertTo (context, culture, value, destinationType);
 129                 }
 130
 131                 public override object ConvertFrom (ITypeDescriptorContext context,
 132                         CultureInfo culture,
 133                         object value)
 134                 {
 135                         string fontFamily = value as string;
 136                         if (fontFamily == null)
 137                                 return base.ConvertFrom (context, culture, value);
 138
 139                         // MS creates a font from the given family with
 140                         // emSize = 8.
 141                         return new Font (fontFamily, 8);
 142                 }
 143
 144                 public override object CreateInstance (ITypeDescriptorContext context,
 145                         IDictionary propertyValues)
 146                 {
 147                         Object value;
 148                         byte charSet = 1;
 149                         float size = 8;
 150                         String name = null;
 151                         bool vertical = false;
 152                         FontStyle style = FontStyle.Regular;
 153                         FontFamily fontFamily = null;
 154                         GraphicsUnit unit = GraphicsUnit.Point;
 155
 156                         if ((value = propertyValues ["GdiCharSet"]) != null)
 157                                 charSet = (byte) value;
 158
 159                         if ((value = propertyValues ["Size"]) != null)
 160                                 size = (float) value;
 161
 162                         if ((value = propertyValues ["Unit"]) != null)
 163                                 unit = (GraphicsUnit) value;
 164
 165                         if ((value = propertyValues ["Name"]) != null)
 166                                 name = (String) value;
 167
 168                         if ((value = propertyValues ["GdiVerticalFont"]) != null)
 169                                 vertical = (bool) value;
 170
 171                         if ((value = propertyValues ["Bold"]) != null) {
 172                                 bool bold = (bool) value;
 173                                 if (bold == true)
 174                                         style |= FontStyle.Bold;
 175                         }
 176
 177                         if ((value = propertyValues ["Italic"]) != null) {
 178                                 bool italic = (bool) value;
 179                                 if (italic == true)
 180                                         style |= FontStyle.Italic;
 181                         }
 182
 183                         if ((value = propertyValues ["Strikeout"]) != null) {
 184                                 bool strike = (bool) value;
 185                                 if (strike == true)
 186                                         style |= FontStyle.Strikeout;
 187                         }
 188
 189                         if ((value = propertyValues ["Underline"]) != null) {
 190                                 bool underline = (bool) value;
 191                                 if (underline == true)
 192                                         style |= FontStyle.Underline;
 193                         }
 194
 195                         /* ?? Should default font be culture dependent ?? */
 196                         if (name == null)
 197                                 fontFamily = new FontFamily ("Tahoma");
 198                         else {
 199                                 name = name.ToLower ();
 200                                 FontCollection collection = new InstalledFontCollection ();
 201                                 FontFamily [] installedFontList = collection.Families;
 202                                 foreach (FontFamily font in installedFontList) {
 203                                         if (name == font.Name.ToLower ()) {
 204                                                 fontFamily = font;
 205                                                 break;
 206                                         }
 207                                 }
 208
 209                                 // font family not found in installed fonts
 210                                 if (fontFamily == null) {
 211                                         collection = new PrivateFontCollection ();
 212                                         FontFamily [] privateFontList = collection.Families;
 213                                         foreach (FontFamily font in privateFontList) {
 214                                                 if (name == font.Name.ToLower ()) {
 215                                                         fontFamily = font;
 216                                                         break;
 217                                                 }
 218                                         }
 219                                 }
 220
 221                                 // font family not found in private fonts also
 222                                 if (fontFamily == null)
 223                                         fontFamily = FontFamily.GenericSansSerif;
 224                         }
 225
 226                         return new Font (fontFamily, size, style, unit, charSet, vertical);
 227                 }
 228
 229                 public override bool GetCreateInstanceSupported (ITypeDescriptorContext context)
 230                 {
 231                         return true;
 232                 }
 233
 234                 public override PropertyDescriptorCollection GetProperties
 235                         (ITypeDescriptorContext context,
 236                         object value, Attribute [] attributes)
 237                 {
 238                         if (value is Font)
 239                                 return TypeDescriptor.GetProperties (value, attributes);
 240
 241                         return base.GetProperties (context, value, attributes);
 242                 }
 243
 244                 public override bool GetPropertiesSupported (ITypeDescriptorContext context)
 245                 {
 246                         return true;
 247                 }
 248
 249                 public sealed class FontNameConverter : TypeConverter
 250 #if NET_2_0
 251                 , IDisposable
 252 #endif
 253                 {
 254                         public FontNameConverter ()
 255                         {
 256                         }
 257 #if NET_2_0
 258                         void IDisposable.Dispose ()\r
 259                         {
 260
 261                         }\r
 262 #endif
 263                         public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
 264                         {
 265                                 if (sourceType == typeof (string))
 266                                         return true;
 267
 268                                 return base.CanConvertFrom (context, sourceType);
 269                         }
 270
 271                         [MonoTODO]
 272                         public override object ConvertFrom (ITypeDescriptorContext context,
 273                                 CultureInfo culture,
 274                                 object value)
 275                         {
 276                                 throw new NotImplementedException ();
 277                         }
 278
 279                         [MonoTODO]
 280                         public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
 281                         {
 282                                 throw new NotImplementedException ();
 283                         }
 284
 285                         [MonoTODO]
 286                         public override bool GetStandardValuesExclusive (ITypeDescriptorContext context)
 287                         {
 288                                 throw new NotImplementedException ();
 289                         }
 290
 291                         public override bool GetStandardValuesSupported (ITypeDescriptorContext context)
 292                         {
 293                                 return true;
 294                         }
 295                 }
 296 \r
 297                 public class FontUnitConverter : EnumConverter\r
 298                 {\r
 299                         public FontUnitConverter () : base (typeof (GraphicsUnit))\r
 300                         {\r
 301                         }\r
 302
 303                         [MonoTODO]\r
 304                         public override TypeConverter.StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)\r
 305                         {\r
 306                                 throw new NotImplementedException ();
 307                         }\r
 308                 }\r
 309         }\r
 310 }\r