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Viewing changes to Do.Interface.Windows/src/Do.Interface/IconProvider.cs

  • Committer: Hardeep S
  • Date: 2009-06-23 03:53:12 UTC
  • Revision ID: ootz0rz@gmail.com-20090623035312-it8tb5wkha6nf31p
Added Do.Interface.Windows, and a bunch of cleanup with old MonoDevelop files elsewhere

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Do.Interface.Windows/src/Do.Interface/IconProvider.cs
 
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/* IconProvider.cs
 
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 *
 
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 * GNOME Do is the legal property of its developers. Please refer to the
 
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 * COPYRIGHT file distributed with this source distribution.
 
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 *
 
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 * This program is free software: you can redistribute it and/or modify
 
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 * it under the terms of the GNU General Public License as published by
 
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 * the Free Software Foundation, either version 3 of the License, or
 
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 * (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
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 */
 
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using System;
 
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using System.IO;
 
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using System.Reflection;
 
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using System.Collections.Generic;
 
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using Gtk;
 
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using Gdk;
 
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using Do.Platform;
 
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namespace Do.Interface
 
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{
 
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        public static class IconProvider
 
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        {
 
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                const string MissingIconIcon = "emblem-noread";
 
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                public const int DefaultIconSize = 80;
 
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                static IconProvider ()
 
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                {
 
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                }
 
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                static Pixbuf UnknownPixbuf () 
 
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                {
 
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                        Pixbuf pb = new Pixbuf (Colorspace.Rgb, true, 8, 1, 1);
 
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                        pb.Fill (0x00000000);
 
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                        return pb;
 
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                }
 
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                static bool IconIsEmbeddedResource (string name)
 
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                {
 
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                        return 0 < name.IndexOf ("@");
 
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                }
 
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                static bool IconIsFile (string name)
 
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                {
 
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                        return name.StartsWith ("/") ||
 
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                                   name.StartsWith ("~/") || 
 
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                                   name.StartsWith ("file://", StringComparison.OrdinalIgnoreCase);
 
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                }
 
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                static Pixbuf IconFromEmbeddedResource (string name, int size)
 
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                {
 
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                        Pixbuf pixbuf = null;
 
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                        string resource, assemblyName;
 
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                        resource = name.Substring (0, name.IndexOf ("@"));
 
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                        assemblyName = name.Substring (resource.Length + 1);
 
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                        try {
 
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                                foreach (Assembly asm in AppDomain.CurrentDomain.GetAssemblies ()) {
 
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                                        if (asm.FullName != assemblyName) continue;
 
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                                        pixbuf = new Pixbuf (asm, resource, size, size);
 
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                                        break;
 
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                                }
 
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                        } catch (Exception e) {
 
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                                Log.Error ("Failed to load icon resource {0} from assembly {1}: {2}",
 
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                                     resource, assemblyName, e.Message); 
 
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                                Log.Debug (e.StackTrace);
 
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                                pixbuf = null;
 
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                        }
 
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                        return pixbuf;
 
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                }
 
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                static Pixbuf IconFromFile (string name, int size)
 
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                {
 
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                        Pixbuf pixbuf;
 
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                        string home = Environment.GetFolderPath (Environment.SpecialFolder.Personal);
 
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                        name = name.Replace ("~", home);
 
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                        try     {
 
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                                pixbuf = new Pixbuf (name, size, size);
 
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                        } catch {
 
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                                pixbuf = null;
 
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                        }
 
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                        return pixbuf;
 
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                }
 
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                static Pixbuf IconFromTheme (string name, int size, IconTheme theme)
 
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                {
 
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                        Pixbuf pixbuf = null;
 
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                        string name_noext;
 
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                        // We may have to remove the extension.
 
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                        if (name.Contains (".")) {
 
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                                name_noext = name.Remove (name.LastIndexOf ("."));
 
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                        } else {
 
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                                name_noext = name;
 
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                        }
 
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                        try     {
 
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                                if (theme.HasIcon (name)) {  
 
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                                        pixbuf = theme.LoadIcon (name, size, 0);
 
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                                } else if (theme.HasIcon (name_noext)) { 
 
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                                        pixbuf = theme.LoadIcon (name_noext, size, 0);
 
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                                } else if (name == "gnome-mime-text-plain" && theme.HasIcon ("gnome-mime-text")) { 
 
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                                        pixbuf = theme.LoadIcon ("gnome-mime-text", size, 0);
 
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                                }
 
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                        } catch {
 
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                                pixbuf = null;
 
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                        }
 
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                        return pixbuf;
 
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                }
 
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                static Pixbuf GenericFileIcon (int size)
 
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                {
 
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                        Pixbuf pixbuf = null;
 
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                        if (IconTheme.Default.HasIcon ("gtk-file")) {
 
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                                try {
 
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                                        pixbuf = IconTheme.Default.LoadIcon ("gtk-file", size, 0);
 
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                                } catch {
 
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                                        pixbuf = null;                                  
 
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                                }
 
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                        }
 
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                        return pixbuf;
 
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                }
 
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                public static Pixbuf PixbufFromIconName (string name, int size)
 
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                {
 
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                        Pixbuf pixbuf;
 
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                        PixbufFromIconName (name, size, out pixbuf);
 
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                        return pixbuf;
 
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                }
 
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                public static bool PixbufFromIconName (string name, int size, out Pixbuf pixbuf)                
 
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                {
 
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                        if (null == name) throw new ArgumentNullException ("name");
 
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                        // The icon can be loaded from a loaded assembly if the icon has
 
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                        // the format: "resource@assemblyname".
 
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                        if (IconIsEmbeddedResource (name)) {
 
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                                pixbuf = IconFromEmbeddedResource (name, size);
 
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                                if (pixbuf != null) return true;
 
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                        } 
 
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                        if (IconIsFile (name)) {
 
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                                pixbuf = IconFromFile (name, size);
 
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                                if (pixbuf != null) return true;
 
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                        }
 
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                        // Try to load icon from defaul theme.
 
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                        pixbuf = IconFromTheme (name, size, IconTheme.Default);
 
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                        if (pixbuf != null) return true;
 
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                        // Try to load a generic file icon.
 
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                        if (name.StartsWith ("gnome-mime")) {
 
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                                pixbuf = GenericFileIcon (size);
 
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                                if (pixbuf != null) return true;
 
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                        }
 
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                        // After this point, we assume that the caller's icon cannot be found, so we attempt
 
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                        // to provide a suitable alternative. We return false to indicate that an alternative
 
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                        // icon selection was made.
 
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                        // Try to load a pretty "no icon found" icon.
 
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                        if (name != MissingIconIcon) {
 
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                                pixbuf = PixbufFromIconName (MissingIconIcon, size);
 
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                                if (pixbuf != null) return false;
 
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                        }
 
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                        // If all else fails, use the UnknownPixbuf.
 
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                        pixbuf = UnknownPixbuf ();
 
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                        return false;
 
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                }
 
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        }
 
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}