mcs/class/System.Web/System.Web.UI/CssStyleCollection.cs

   1 //
   2 // System.Web.UI.CssStyleCollection.cs
   3 //
   4 // Authors:
   5 //      Duncan Mak  (duncan@ximian.com)
   6 //      Gonzalo Paniagua (gonzalo@ximian.com)
   7 //
   8 // (C) 2002 Ximian, Inc. (http://www.ximian.com)
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System;
  33 using System.Collections;
  34 using System.Text;
  35
  36 namespace System.Web.UI {
  37
  38         public sealed class CssStyleCollection
  39         {
  40                 private StateBag bag;
  41                 private StateBag style;
  42
  43                 internal CssStyleCollection (StateBag bag)
  44                 {
  45                         this.bag = bag;
  46                         style = new StateBag ();
  47                         string st_string = bag ["style"] as string;
  48                         if (st_string != null)
  49                                 FillStyle (st_string);
  50                 }
  51
  52                 internal void FillStyle (string s)
  53                 {
  54                         int mark = s.IndexOf (':');
  55                         if (mark == -1)
  56                                 return;
  57                         string key = s.Substring (0, mark). Trim ();
  58                         if (mark + 1 > s.Length)
  59                                 return;
  60
  61                         string fullValue = s.Substring (mark + 1);
  62                         if (fullValue == "")
  63                                 return;
  64
  65                         mark = fullValue.IndexOf (';');
  66                         string value;
  67                         if (mark == -1)
  68                                 value = fullValue.Trim ();
  69                         else
  70                                 value = fullValue.Substring (0, mark).Trim ();
  71
  72                         style.Add (key, value);
  73                         if (mark + 1 > fullValue.Length)
  74                                 return;
  75                         FillStyle (fullValue.Substring (mark + 1));
  76                 }
  77
  78                 private string BagToString ()
  79                 {
  80                         StringBuilder sb = new StringBuilder ();
  81                         foreach (string k in style.Keys)
  82                                 sb.AppendFormat ("{0}: {1}; ", k, style [k]);
  83                         return sb.ToString ();
  84                 }
  85
  86                 public int Count
  87                 {
  88                         get { return style.Count; }
  89                 }
  90
  91                 public string this [string key]
  92                 {
  93                         get {
  94                                 return style [key] as string;
  95                         }
  96
  97                         set {
  98                                 Add (key, value);
  99                         }
 100                 }
 101
 102                 public ICollection Keys {
 103                         get { return style.Keys; }
 104                 }
 105
 106                 public void Add (string key, string value)
 107                 {
 108                         style [key] = value;
 109                         bag ["style"] = BagToString ();
 110                 }
 111
 112                 public void Clear ()
 113                 {
 114                         bag.Remove ("style");
 115                         style.Clear ();
 116                 }
 117
 118                 public void Remove (string key)
 119                 {
 120                         if (style [key] != null) {
 121                                 style.Remove (key);
 122                                 bag ["style"] = BagToString ();
 123                         }
 124                 }
 125         }
 126 }
 127