Util/KdeUtils.cs

   1 //
   2 // KdeUtils.cs
   3 //
   4 // Copyright (C) 2005 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a copy
   9 // of this software and associated documentation files (the "Software"), to deal
  10 // in the Software without restriction, including without limitation the rights
  11 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12 // copies of the Software, and to permit persons to whom the Software is
  13 // furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in all
  16 // copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24 // SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.Diagnostics;
  29 using System.IO;
  30 using Mono.Posix;
  31
  32 namespace Beagle.Util {
  33         public class KdeUtils {
  34
  35                 // No instantiation
  36                 private KdeUtils () { }
  37
  38                 private static string [] icon_sizes = { "128x128", "64x64", "48x48", "32x32", "22x22", "16x16" };
  39                 private static string [] kde_locations = { ExternalStringsHack.KdePrefix, Environment.GetEnvironmentVariable ("KDEDIR"), "/opt/kde3", "/usr" };
  40                 public static string [] KdeLocations {
  41                         get { return kde_locations; }
  42                 }
  43
  44                 // Finds an icon by its name and returns its absolute path, or null if not found.
  45                 public static string LookupIcon (string icon_name) {
  46                         foreach (string kde_dir in KdeLocations) {
  47                                 if (kde_dir == null || kde_dir == String.Empty || !Directory.Exists (kde_dir))
  48                                         continue;
  49
  50                                 string kde_share = Path.Combine (kde_dir, "share");
  51                                 string icon_prefix = Path.Combine (kde_share, "icons");
  52                                 string icon_theme_hicolor = Path.Combine (icon_prefix, "hicolor");
  53                                 string [] icon_themes = { null, null };
  54
  55                                 if (! Directory.Exists (icon_theme_hicolor))
  56                                         icon_theme_hicolor = null;
  57
  58                                 // FIXME: We should probably support svg icons at some point
  59                                 if (! icon_name.EndsWith(".png"))
  60                                         icon_name = icon_name + ".png";
  61
  62                                 // We try up to 2 icon themes: we first try the theme pointed at by the
  63                                 // "default.kde" link, and then we try the trusted default "hicolor" theme.
  64                                 // We handle the situations if either (or both) of these aren't present, or
  65                                 // if default.kde == hicolor.
  66
  67                                 string icon_theme_default = Syscall.readlink (Path.Combine (icon_prefix, "default.kde"));
  68                                 if (icon_theme_default != null) {
  69                                         if (! icon_theme_default.StartsWith ("/"))
  70                                                 icon_theme_default = Path.Combine (icon_prefix, icon_theme_default);
  71
  72                                         if (! Directory.Exists (icon_theme_default) || icon_theme_default == icon_theme_hicolor)
  73                                                 icon_theme_default = null;
  74                                 }
  75
  76                                 int i = 0;
  77                                 if (icon_theme_default != null)
  78                                         icon_themes [i++] = icon_theme_default;
  79                                 if (icon_theme_hicolor != null)
  80                                         icon_themes [i++] = icon_theme_hicolor;
  81                                 if (i == 0)
  82                                         continue;
  83
  84                                 // Loop through all detected themes
  85                                 foreach (string theme in icon_themes) {
  86                                         if (theme == null)
  87                                                 continue;
  88
  89                                         // Try the preset icon sizes
  90                                         foreach (string size in icon_sizes) {
  91                                                 string icon_base = Path.Combine (theme, size);
  92                                                 if (! Directory.Exists (icon_base))
  93                                                         continue;
  94
  95                                                 foreach (string icon_subdir in Directory.GetDirectories (icon_base)) {
  96                                                         string icon_dir = Path.Combine (icon_base, icon_subdir);
  97
  98                                                         // Check for icon existance
  99                                                         string icon_path = Path.Combine (icon_dir, icon_name);
 100                                                         if (File.Exists (icon_path))
 101                                                                 return icon_path;
 102                                                 }
 103                                         }
 104                                 }
 105                                 // Only search the first valid path that we find
 106                                 break;
 107                         }
 108                         return null;
 109                 }
 110
 111         }
 112 }
 113