// // System.Drawing.FontConverter.cs // // Authors: // Dennis Hayes (dennish@Raytek.com) // Gonzalo Paniagua Javier (gonzalo@ximian.com) // Ravindra (rkumar@novell.com) // // Copyright (C) 2002,2003 Ximian, Inc. http://www.ximian.com // // Copyright (C) 2004-2006 Novell, Inc (http://www.novell.com) // // Permission is hereby granted, free of charge, to any person obtaining // a copy of this software and associated documentation files (the // "Software"), to deal in the Software without restriction, including // without limitation the rights to use, copy, modify, merge, publish, // distribute, sublicense, and/or sell copies of the Software, and to // permit persons to whom the Software is furnished to do so, subject to // the following conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. // using System; using System.Text; using System.Collections; using System.ComponentModel; using System.Globalization; using System.Drawing.Text; using System.ComponentModel.Design.Serialization; using System.Reflection; namespace System.Drawing { public class FontConverter : TypeConverter { public FontConverter () { } #if !TARGET_JVM ~FontConverter () { // required to match API definition } #endif public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof (string)) return true; return base.CanConvertFrom (context, sourceType); } public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType) { if (destinationType == typeof (String)) return true; if (destinationType == typeof (InstanceDescriptor)) return true; return base.CanConvertTo (context, destinationType); } public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if ((destinationType == typeof (string)) && (value is Font)) { Font font = (Font) value; StringBuilder sb = new StringBuilder (); sb.Append (font.Name).Append (culture.TextInfo.ListSeparator[0] + " "); sb.Append (font.Size); switch (font.Unit) { // MS throws ArgumentException, if unit is set // to GraphicsUnit.Display // Don't know what to append for GraphicsUnit.Display case GraphicsUnit.Display: sb.Append ("display"); break; case GraphicsUnit.Document: sb.Append ("doc"); break; case GraphicsUnit.Point: sb.Append ("pt"); break; case GraphicsUnit.Inch: sb.Append ("in"); break; case GraphicsUnit.Millimeter: sb.Append ("mm"); break; case GraphicsUnit.Pixel: sb.Append ("px"); break; case GraphicsUnit.World: sb.Append ("world"); break; } if (font.Style != FontStyle.Regular) sb.Append (culture.TextInfo.ListSeparator[0] + " style=").Append (font.Style); return sb.ToString (); } if ((destinationType == typeof (InstanceDescriptor)) && (value is Font)) { Font font = (Font) value; ConstructorInfo met = typeof(Font).GetConstructor (new Type[] {typeof(string), typeof(float), typeof(FontStyle), typeof(GraphicsUnit)}); object[] args = new object[4]; args [0] = font.Name; args [1] = font.Size; args [2] = font.Style; args [3] = font.Unit; return new InstanceDescriptor (met, args); } return base.ConvertTo (context, culture, value, destinationType); } public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value) { FontStyle f_style; float f_size; GraphicsUnit f_unit; string font; string units; string[] fields; if (! (value is string)) { return base.ConvertFrom (context, culture, value); } font = (string)value; font = font.Trim (); if (font.Length == 0) { return null; } if (culture == null) { culture = CultureInfo.CurrentCulture; } // Format is FontFamily, size[[, style=1,2,3]] // This is a bit tricky since the comma can be used for styles and fields fields = font.Split(new char[] {culture.TextInfo.ListSeparator[0]}); if (fields.Length < 1) { throw new ArgumentException("Failed to parse font format"); } font = fields[0]; f_size = 8f; units = "px"; f_unit = GraphicsUnit.Pixel; if (fields.Length > 1) { // We have a size for (int i = 0; i < fields[1].Length; i++) { if (Char.IsLetter(fields[1][i])) { f_size = (float)TypeDescriptor.GetConverter(typeof(float)).ConvertFromString(context, culture, fields[1].Substring(0, i)); units = fields[1].Substring(i); break; } } if (units == "display") { f_unit = GraphicsUnit.Display; } else if (units == "doc") { f_unit = GraphicsUnit.Document; } else if (units == "pt") { f_unit = GraphicsUnit.Point; } else if (units == "in") { f_unit = GraphicsUnit.Inch; } else if (units == "mm") { f_unit = GraphicsUnit.Millimeter; } else if (units == "px") { f_unit = GraphicsUnit.Pixel; } else if (units == "world") { f_unit = GraphicsUnit.World; } } f_style = FontStyle.Regular; if (fields.Length > 2) { // We have style string compare; for (int i = 2; i < fields.Length; i++) { compare = fields[i]; if (compare.IndexOf("Regular") != -1) { f_style |= FontStyle.Regular; } if (compare.IndexOf("Bold") != -1) { f_style |= FontStyle.Bold; } if (compare.IndexOf("Italic") != -1) { f_style |= FontStyle.Italic; } if (compare.IndexOf("Strikeout") != -1) { f_style |= FontStyle.Strikeout; } if (compare.IndexOf("Underline") != -1) { f_style |= FontStyle.Underline; } } } return new Font (font, f_size, f_style, f_unit); } public override object CreateInstance (ITypeDescriptorContext context, IDictionary propertyValues) { Object value; byte charSet = 1; float size = 8; String name = null; bool vertical = false; FontStyle style = FontStyle.Regular; FontFamily fontFamily = null; GraphicsUnit unit = GraphicsUnit.Point; if ((value = propertyValues ["GdiCharSet"]) != null) charSet = (byte) value; if ((value = propertyValues ["Size"]) != null) size = (float) value; if ((value = propertyValues ["Unit"]) != null) unit = (GraphicsUnit) value; if ((value = propertyValues ["Name"]) != null) name = (String) value; if ((value = propertyValues ["GdiVerticalFont"]) != null) vertical = (bool) value; if ((value = propertyValues ["Bold"]) != null) { bool bold = (bool) value; if (bold == true) style |= FontStyle.Bold; } if ((value = propertyValues ["Italic"]) != null) { bool italic = (bool) value; if (italic == true) style |= FontStyle.Italic; } if ((value = propertyValues ["Strikeout"]) != null) { bool strike = (bool) value; if (strike == true) style |= FontStyle.Strikeout; } if ((value = propertyValues ["Underline"]) != null) { bool underline = (bool) value; if (underline == true) style |= FontStyle.Underline; } /* ?? Should default font be culture dependent ?? */ if (name == null) fontFamily = new FontFamily ("Tahoma"); else { name = name.ToLower (); FontCollection collection = new InstalledFontCollection (); FontFamily [] installedFontList = collection.Families; foreach (FontFamily font in installedFontList) { if (name == font.Name.ToLower ()) { fontFamily = font; break; } } // font family not found in installed fonts if (fontFamily == null) { collection = new PrivateFontCollection (); FontFamily [] privateFontList = collection.Families; foreach (FontFamily font in privateFontList) { if (name == font.Name.ToLower ()) { fontFamily = font; break; } } } // font family not found in private fonts also if (fontFamily == null) fontFamily = FontFamily.GenericSansSerif; } return new Font (fontFamily, size, style, unit, charSet, vertical); } public override bool GetCreateInstanceSupported (ITypeDescriptorContext context) { return true; } public override PropertyDescriptorCollection GetProperties (ITypeDescriptorContext context, object value, Attribute [] attributes) { if (value is Font) return TypeDescriptor.GetProperties (value, attributes); return base.GetProperties (context, value, attributes); } public override bool GetPropertiesSupported (ITypeDescriptorContext context) { return true; } public sealed class FontNameConverter : TypeConverter #if NET_2_0 , IDisposable #endif { FontFamily [] fonts; public FontNameConverter () { fonts = FontFamily.Families; } #if NET_2_0 void IDisposable.Dispose () { } #endif public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof (string)) return true; return base.CanConvertFrom (context, sourceType); } public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value) { if (value is string) return value; return base.ConvertFrom (context, culture, value); } public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context) { string [] values = new string [fonts.Length]; for (int i = fonts.Length; i > 0;){ i--; values [i] = fonts [i].Name; } return new TypeConverter.StandardValuesCollection (values); } public override bool GetStandardValuesExclusive (ITypeDescriptorContext context) { // We allow other values other than those in the font list. return false; } public override bool GetStandardValuesSupported (ITypeDescriptorContext context) { // Yes, we support picking an element from the list. return true; } } public class FontUnitConverter : EnumConverter { public FontUnitConverter () : base (typeof (GraphicsUnit)) {} public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context) { return base.GetStandardValues (context); } } } }