class/Mono.WebBrowser/Mono.Mozilla/AsciiString.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
  32         internal class AsciiString : IDisposable
  33         {
  34
  35                 [StructLayout(LayoutKind.Sequential)]
  36                 class nsStringContainer {
  37                         IntPtr v;
  38                         IntPtr d1;
  39                         uint d2;
  40                         IntPtr d3;
  41                 }
  42                 private bool disposed = false;
  43                 private nsStringContainer unmanagedContainer;
  44                 private HandleRef handle;
  45                 private string str = String.Empty;
  46                 private bool dirty;
  47
  48
  49                 public AsciiString(string value)
  50                 {
  51                         unmanagedContainer = new nsStringContainer ();
  52                         IntPtr p = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (nsStringContainer)));
  53                         Marshal.StructureToPtr (unmanagedContainer, p, false);
  54                         handle = new HandleRef (typeof (nsStringContainer), p);
  55                         uint result = Base.gluezilla_CStringContainerInit (handle);
  56                         String = value;
  57                 }
  58
  59                 ~AsciiString ()
  60                 {
  61                         Dispose (false);
  62                 }
  63
  64                 #region IDisposable Members
  65
  66                 protected virtual void Dispose (bool disposing)
  67                 {
  68                         if (!disposed) {
  69                                 if (disposing) {
  70                                         Base.gluezilla_CStringContainerFinish (handle);
  71                                         Marshal.FreeHGlobal (handle.Handle);
  72                                 }
  73                                 disposed = true;
  74                         }
  75                 }
  76
  77                 public void Dispose ()
  78                 {
  79                         Dispose (true);
  80                         GC.SuppressFinalize (this);
  81                 }
  82
  83                 #endregion
  84
  85
  86                 public HandleRef Handle {
  87                         get {
  88                                 dirty = true;
  89                                 return handle;
  90                         }
  91                 }
  92
  93                 public string String {
  94                         get {
  95                                 if (dirty) {
  96                                         IntPtr buf;
  97                                         bool term;
  98                                         Base.gluezilla_CStringGetData (handle, out buf, out term);
  99                                         str = Marshal.PtrToStringAnsi (buf);
 100                                         dirty = false;
 101                                 }
 102                                 return str;
 103                         }
 104                         set {
 105                                 if (str != value) {
 106                                         str = value;
 107                                         Base.gluezilla_CStringSetData (handle, str, (uint)str.Length);
 108                                 }
 109                         }
 110                 }
 111
 112                 public int Length {
 113                         get { return String.Length; }
 114                 }
 115
 116                 public override string ToString ()
 117                 {
 118                         return String;
 119                 }
 120
 121         }
 122 }