images/Images.cs

   1 //
   2 // Images.cs
   3 //
   4 // Copyright (C) 2004 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all 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
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.IO;
  29 using System.Reflection;
  30 using Beagle.Util;
  31
  32 using Gnome;
  33
  34 namespace Beagle {
  35
  36         public class Images {
  37
  38                 // This class is fully static.
  39                 private Images () { }
  40
  41                 static private Stream GetStreamInner (string name)
  42                 {
  43                         Stream stream = null;
  44
  45                         if (name.StartsWith ("file://")) {
  46                                 name = name.Substring ("file://".Length);
  47                                 if (File.Exists (name))
  48                                         stream = File.OpenRead (name);
  49                         } else if (name.StartsWith ("/")) {
  50                                 if (File.Exists (name))
  51                                         stream = File.OpenRead (name);
  52                         } else {
  53                                 Assembly assembly = Assembly.GetExecutingAssembly ();
  54                                 stream = assembly.GetManifestResourceStream (name);
  55                         }
  56
  57                         return stream;
  58                 }
  59
  60                 static public Stream GetStream (string name)
  61                 {
  62                         Stream stream;
  63
  64                         if (name == null || name.Length == 0)
  65                                 return null;
  66
  67                         stream = GetStreamInner (name);
  68                         if (stream == null)
  69                                 stream = GetStreamInner (name + ".png");
  70                         if (stream == null)
  71                                 stream = GetStreamInner (name + ".jpg");
  72                         if (stream == null)
  73                                 Console.WriteLine ("Couldn't get stream for image '{0}'", name);
  74                         return stream;
  75                 }
  76
  77                 static public Gdk.Pixbuf GetPixbuf (string name)
  78                 {
  79                         Stream s = GetStream (name);
  80                         return s != null ? new Gdk.Pixbuf (s) : null;
  81                 }
  82
  83                 static public Gdk.Pixbuf GetPixbuf (string name, int maxWidth, int maxHeight)
  84                 {
  85                         Gdk.Pixbuf pixbuf = GetPixbuf (name);
  86                         if (pixbuf == null)
  87                                 return null;
  88
  89                         double scaleWidth = maxWidth / (double)pixbuf.Width;
  90                         double scaleHeight = maxHeight / (double)pixbuf.Height;
  91
  92                         double s = Math.Min (scaleWidth, scaleHeight);
  93                         if (s >= 1.0)
  94                                 return pixbuf;
  95
  96                         int w = (int) Math.Round (s * pixbuf.Width);
  97                         int h = (int) Math.Round (s * pixbuf.Height);
  98
  99                         return pixbuf.ScaleSimple (w, h, Gdk.InterpType.Bilinear);
 100                 }
 101
 102                 static public Gtk.Widget GetWidget (string name)
 103                 {
 104                         Gdk.Pixbuf pixbuf = GetPixbuf (name);
 105                         return pixbuf != null ? new Gtk.Image (pixbuf) : null;
 106                 }
 107
 108                 static public Gtk.Widget GetWidget (string name, int maxWidth, int maxHeight)
 109                 {
 110                         Gdk.Pixbuf pixbuf = GetPixbuf (name, maxWidth, maxHeight);
 111                         return pixbuf != null ? new Gtk.Image (pixbuf) : null;
 112                 }
 113
 114                 static public string GetHtmlSourceForStock (string stockid,
 115                                                             int size)
 116                 {
 117                         int base_size;
 118                         IconTheme icon_theme = new IconTheme ();
 119                         string path = icon_theme.LookupIcon (stockid, size, IconData.Zero, out base_size);
 120
 121                         if (path != null && path != "") {
 122                                 return "file://" + path;
 123                         }
 124                         return null;
 125                 }
 126
 127                 static public string GetHtmlSource (byte[] binary_data,
 128                                                     string mime_type)
 129                 {
 130                         string base64_string =
 131                                 System.Convert.ToBase64String(binary_data,
 132                                                               0,
 133                                                               binary_data.Length);
 134
 135                         string data = "data:" + mime_type + ";base64," + base64_string;
 136
 137                         return data;
 138                 }
 139
 140                 static public string GetHtmlSource (string name,
 141                                                     string mime_type)
 142                 {
 143                         if (name == null || name.Length == 0) {
 144                                 return null;
 145                         } else if (name.StartsWith ("file://")) {
 146                                 return name;
 147                         } else if (name.StartsWith ("/")) {
 148                                 return StringFu.PathToQuotedFileUri (name);
 149                         } else {
 150                                 Stream stream;
 151
 152                                 if (mime_type == null || mime_type == "")
 153                                         throw new ArgumentException ();
 154
 155                                 // FIXME: it's probably worth caching these,
 156                                 // since they'll probably be repeated a lot
 157
 158                                 stream = GetStream (name);
 159                                 if (stream == null)
 160                                         return null;
 161
 162                                 byte[] binary_data = new Byte[stream.Length];
 163                                 stream.Read(binary_data, 0, (int) stream.Length);
 164                                 stream.Close ();
 165                                 return GetHtmlSource (binary_data, mime_type);
 166                         }
 167                 }
 168         }
 169 }