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Viewing changes to Launchpad/src/LaunchpadIcons.cs

  • Committer: djsiegel at gmail
  • Date: 2007-11-07 17:13:21 UTC
  • Revision ID: djsiegel@gmail.com-20071107171321-zgu46ukqlpdx1ypa
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Launchpad/src/LaunchpadIcons.cs
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/* LaunchpadIcons.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.Text.RegularExpressions;
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using System.Collections.Generic;
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using System.IO;
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using System.Reflection;
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using Do.Addins;
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using Do.Universe;
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namespace Do.Launchpad
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{
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        /// <summary>
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        /// Singleton class for saving and storing Launchpad icons.
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        /// When an icon is requested, it is extracted from the resources file
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        /// and saved to a temp directory, and the path to that icon is returned.
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        /// Upon destruction, the class will clear out all its icons.
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        /// </summary>
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        class LaunchpadIcons
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        {
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                public static LaunchpadIcons instance = null;
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                private Dictionary<string, string> iconcache;
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                Assembly asm;
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                private LaunchpadIcons()
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                {
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                        iconcache = new Dictionary<string, string>();
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                        asm = Assembly.GetExecutingAssembly();
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                }
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                public static LaunchpadIcons Instance
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                {
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                        get
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                        {
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                                if (instance == null)
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                                {
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                                        instance = new LaunchpadIcons();
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                                }
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                                return instance;
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                        }
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                }
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                ~LaunchpadIcons()
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                {
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                        foreach (string s in iconcache.Keys)
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                        {
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                                try
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                                {
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                                        if (File.Exists(iconcache[s]))
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                                        {
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                                                File.Delete(iconcache[s]); //TODO: be smarter about this.
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                                        }
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                                }
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                                catch (Exception)
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                                {
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                                }
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                        }
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                }
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                public string GetIconPath(string iconName)
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                {
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                        if (false == iconcache.ContainsKey(iconName))
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                        {
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                                //Extract the icon from the resource file.
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                                Stream icon = asm.GetManifestResourceStream(iconName);
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                                //TODO: Use a facility within gnome-do's core for creating
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                                //temporary icons
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                                if (false == Directory.Exists("/tmp/gnome-do"))
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                                        Directory.CreateDirectory("/tmp/gnome-do");
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                                if (false == Directory.Exists("/tmp/gnome-do/icons"))
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                                        Directory.CreateDirectory("/tmp/gnome-do/icons");
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                                string tmp_filename = Path.Combine("/tmp/gnome-do/icons", iconName);
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                                BinaryReader input = new BinaryReader(icon);
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                                BinaryWriter output = new BinaryWriter(File.OpenWrite(tmp_filename));
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                                int try_read;
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                                while (true) {
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                                        try {
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                                                try_read = input.ReadInt32();
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                                                output.Write(try_read);
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                                        } catch (Exception) {
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                                                break;
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                                        }
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                                }
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                                input.Close();
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                                output.Close();
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                                iconcache[iconName] = tmp_filename;
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                        }
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                        return iconcache[iconName];
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                }
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        }
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}