//
// 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[<units>[, 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);
}
}
}
}
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