Tiles/TileFromTemplate.cs

   1 //
   2 // TileFromTemplate.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.Collections;
  29 using System.IO;
  30 using System.Reflection;
  31 using System.Text;
  32
  33 namespace Beagle.Tile {
  34
  35         abstract public class TileFromTemplate : Tile {
  36
  37                 private Template template = null;
  38                 private bool populated = false;
  39                 private string template_resource;
  40
  41                 public TileFromTemplate (string resource) : base ()
  42                 {
  43                         template_resource = resource;
  44                 }
  45
  46                 protected Template Template {
  47                         get {
  48                                 if (template == null) {
  49                                         template = new Template (template_resource);
  50                                         Template["TileId"] = UniqueKey;
  51                                         Template["action:"] = "action:" + UniqueKey + "!";
  52
  53                                         if (this.Uri != null && this.Query != null) {
  54                                                 SnippetRequest req = new SnippetRequest (this.Query, this.Hit);
  55                                                 try {
  56                                                         SnippetResponse response = (SnippetResponse) req.Send ();
  57                                                         Template["Snippet"] = response.Snippet;
  58                                                 } catch { }
  59                                         }
  60                                 }
  61
  62                                 return template;
  63                         }
  64                 }
  65
  66                 protected abstract void PopulateTemplate ();
  67
  68                 public override void Render (TileRenderContext ctx)
  69                 {
  70                         if (!populated) {
  71                                 PopulateTemplate ();
  72                                 populated = true;
  73                         }
  74
  75                         ctx.Write (Template.ToString ());
  76                 }
  77
  78                 protected override void Changed ()
  79                 {
  80                         populated = false;
  81                         base.Changed ();
  82                 }
  83         }
  84 }