mcs/class/Mono.WebBrowser/Mono.Mozilla/UniString.cs

   1 //Permission is hereby granted, free of charge, to any person obtaining
   2 //a copy of this software and associated documentation files (the
   3 //"Software"), to deal in the Software without restriction, including
   4 //without limitation the rights to use, copy, modify, merge, publish,
   5 //distribute, sublicense, and/or sell copies of the Software, and to
   6 //permit persons to whom the Software is furnished to do so, subject to
   7 //the following conditions:
   8 //
   9 //The above copyright notice and this permission notice shall be
  10 //included in all copies or substantial portions of the Software.
  11 //
  12 //THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 //EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 //MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 //NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 //LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 //OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 //WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 //Copyright (c) 2008 Novell, Inc.
  21 //
  22 //Authors:
  23 //      Andreia Gaita (avidigal@novell.com)
  24 //
  25
  26 using System;
  27 using System.Runtime.InteropServices;
  28
  29 namespace Mono.Mozilla
  30 {
  31         internal class UniString : IDisposable
  32         {
  33                 [StructLayout(LayoutKind.Sequential)]
  34                 class nsStringContainer {
  35                         IntPtr v;
  36                         IntPtr d1;
  37                         uint d2;
  38                         IntPtr d3;
  39                 }
  40                 private bool disposed = false;
  41                 private nsStringContainer unmanagedContainer;
  42                 private HandleRef handle;
  43                 private string str = String.Empty;
  44                 private bool dirty;
  45
  46                 public UniString(string value)
  47                 {
  48                         unmanagedContainer = new nsStringContainer ();
  49                         IntPtr p = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (nsStringContainer)));
  50                         Marshal.StructureToPtr (unmanagedContainer, p, false);
  51                         handle = new HandleRef (typeof (nsStringContainer), p);
  52                         uint result = Base.gluezilla_StringContainerInit (handle);
  53                         String = value;
  54                 }
  55
  56                 ~UniString ()
  57                 {
  58                         Dispose (false);
  59                 }
  60
  61                 #region IDisposable Members
  62
  63                 protected virtual void Dispose (bool disposing)
  64                 {
  65                         if (!disposed) {
  66                                 if (disposing) {
  67                                          Base.gluezilla_StringContainerFinish (handle);
  68                                          Marshal.FreeHGlobal (handle.Handle);
  69                                 }
  70                                 disposed = true;
  71                         }
  72                 }
  73
  74                 public void Dispose ()
  75                 {
  76                         Dispose (true);
  77                         GC.SuppressFinalize (this);
  78                 }
  79
  80                 #endregion
  81
  82
  83                 public HandleRef Handle {
  84                         get {
  85                                 dirty = true;
  86                                 return handle;
  87                         }
  88                 }
  89
  90                 public string String {
  91                         get {
  92                                 if (dirty) {
  93                                         IntPtr buf;
  94                                         bool term;
  95                                         Base.gluezilla_StringGetData (handle, out buf, out term);
  96                                         str = Marshal.PtrToStringUni (buf);
  97                                         dirty = false;
  98                                 }
  99                                 return str;
 100                         }
 101                         set {
 102                                 if (str != value) {
 103                                         str = value;
 104                                         Base.gluezilla_StringSetData (handle, str, (uint)str.Length);
 105                                 }
 106                         }
 107                 }
 108
 109                 public int Length {
 110                         get { return String.Length; }
 111                 }
 112
 113                 public override string ToString ()
 114                 {
 115                         return String;
 116                 }
 117
 118         }
 119 }