mcs/class/Managed.Windows.Forms/System.Windows.Forms/Clipboard.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) 2005 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Peter Bartok    (pbartok@novell.com)
  24 //
  25 //
  26
  27 // COMPLETE
  28
  29 using System;
  30 using System.Drawing;
  31 using System.IO;
  32 using System.Runtime.InteropServices;
  33
  34 namespace System.Windows.Forms {
  35         public sealed class Clipboard {
  36                 #region Local Variables
  37                 #endregion      // Local Variables
  38
  39                 #region Constructors
  40                 private Clipboard() {
  41                 }
  42                 #endregion      // Constructors
  43
  44                 #region Private Methods
  45                 private static bool ConvertToClipboardData(ref int type, object obj, out byte[] data) {
  46                         data = null;
  47                         return false;
  48                 }
  49
  50                 private static bool ConvertFromClipboardData(int type, IntPtr data, out object obj) {
  51                         obj = null;
  52                         if (data == IntPtr.Zero) {
  53                                 return false;
  54                         }
  55                         return false;
  56                 }
  57                 #endregion      // Private Methods
  58
  59                 #region Public Static Methods
  60                 public static IDataObject GetDataObject() {
  61                         DataObject              clipboard;
  62                         IntPtr                  clipboard_handle;
  63                         int[]                   native_formats;
  64                         DataFormats.Format      item_format;
  65                         object                  managed_clipboard_item;
  66                         XplatUI.ClipboardToObject converter;
  67
  68                         converter = new XplatUI.ClipboardToObject(ConvertFromClipboardData);
  69
  70                         clipboard_handle = XplatUI.ClipboardOpen();
  71                         native_formats = XplatUI.ClipboardAvailableFormats(clipboard_handle);
  72                         if (native_formats == null) {
  73                                 return null;    // Clipboard empty
  74                         }
  75
  76                         // Build the IDataObject
  77                         clipboard = new DataObject();
  78                         for (int i = 0; i < native_formats.Length; i++) {
  79                                 // We might get a format we don't understand or know
  80                                 item_format = DataFormats.GetFormat(native_formats[i]);
  81                                 if (item_format != null) {
  82                                         managed_clipboard_item = XplatUI.ClipboardRetrieve(clipboard_handle, native_formats[i], converter);
  83
  84                                         if (managed_clipboard_item != null) {
  85                                                 clipboard.SetData(item_format.Name, managed_clipboard_item);
  86                                                 // We don't handle 'bitmap' since it involves handles, so we'll equate it to dib
  87                                                 if (item_format.Name == DataFormats.Dib) {
  88                                                         clipboard.SetData(DataFormats.Bitmap, managed_clipboard_item);
  89                                                 }
  90                                         }
  91                                 }
  92                         }
  93
  94                         XplatUI.ClipboardClose(clipboard_handle);
  95
  96                         return clipboard;
  97                 }
  98
  99                 public static void SetDataObject(object data) {
 100                         SetDataObject(data, true);
 101
 102                 }
 103
 104                 public static void SetDataObject(object data, bool copy) {
 105                         IntPtr                  clipboard_handle;
 106                         XplatUI.ObjectToClipboard converter;
 107                         int                     native_format;
 108                         DataFormats.Format      item_format;
 109
 110                         converter = new XplatUI.ObjectToClipboard(ConvertToClipboardData);
 111
 112                         clipboard_handle = XplatUI.ClipboardOpen();
 113
 114                         native_format = -1;
 115
 116                         item_format = DataFormats.Format.Find(data.GetType().FullName);
 117                         if ((item_format != null) && (item_format.Name != DataFormats.StringFormat)) {
 118                                 native_format = item_format.Id;
 119                         }
 120
 121                         XplatUI.ClipboardStore(clipboard_handle, data, native_format, converter);
 122                         XplatUI.ClipboardClose(clipboard_handle);
 123                 }
 124                 #endregion      // Public Static Methods
 125         }
 126 }