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
  61                 public static IDataObject GetDataObject ()
  62                 {
  63                         return GetDataObject (false);
  64                 }
  65
  66                 internal static IDataObject GetDataObject (bool primary_selection)
  67                 {
  68                         DataObject              clipboard;
  69                         IntPtr                  clipboard_handle;
  70                         int[]                   native_formats;
  71                         DataFormats.Format      item_format;
  72                         object                  managed_clipboard_item;
  73                         XplatUI.ClipboardToObject converter;
  74
  75                         converter = new XplatUI.ClipboardToObject(ConvertFromClipboardData);
  76
  77                         clipboard_handle = XplatUI.ClipboardOpen (primary_selection);
  78                         native_formats = XplatUI.ClipboardAvailableFormats(clipboard_handle);
  79                         if (native_formats == null) {
  80                                 return null;    // Clipboard empty
  81                         }
  82
  83                         // Build the IDataObject
  84                         clipboard = new DataObject();
  85                         for (int i = 0; i < native_formats.Length; i++) {
  86                                 // We might get a format we don't understand or know
  87                                 item_format = DataFormats.GetFormat(native_formats[i]);
  88
  89                                 if (item_format != null) {
  90                                         managed_clipboard_item = XplatUI.ClipboardRetrieve(clipboard_handle, native_formats[i], converter);
  91
  92                                         if (managed_clipboard_item != null) {
  93                                                 clipboard.SetData(item_format.Name, managed_clipboard_item);
  94                                                 // We don't handle 'bitmap' since it involves handles, so we'll equate it to dib
  95                                                 if (item_format.Name == DataFormats.Dib) {
  96                                                         clipboard.SetData(DataFormats.Bitmap, managed_clipboard_item);
  97                                                 }
  98                                         }
  99                                 }
 100                         }
 101
 102                         XplatUI.ClipboardClose(clipboard_handle);
 103
 104                         return clipboard;
 105                 }
 106
 107                 public static void SetDataObject(object data) {
 108                         SetDataObject(data, true);
 109
 110                 }
 111
 112                 public static void SetDataObject(object data, bool copy) {
 113                         IntPtr                  clipboard_handle;
 114                         XplatUI.ObjectToClipboard converter;
 115                         int                     native_format;
 116                         DataFormats.Format      item_format;
 117
 118                         converter = new XplatUI.ObjectToClipboard(ConvertToClipboardData);
 119
 120                         clipboard_handle = XplatUI.ClipboardOpen(false);
 121                         XplatUI.ClipboardStore(clipboard_handle, null, 0, null);        // Empty clipboard
 122
 123                         native_format = -1;
 124
 125                         if (data is IDataObject) {
 126                                 string[] formats;
 127
 128                                 formats = ((IDataObject)data).GetFormats();
 129                                 for (int i = 0; i < formats.Length; i++) {
 130                                         item_format = DataFormats.GetFormat(formats[i]);
 131                                         if ((item_format != null) && (item_format.Name != DataFormats.StringFormat)) {
 132                                                 native_format = item_format.Id;
 133                                         }
 134
 135                                         XplatUI.ClipboardStore(clipboard_handle, ((IDataObject)data).GetData(formats[i]), native_format, converter);
 136                                 }
 137                         } else {
 138                                 item_format = DataFormats.Format.Find(data.GetType().FullName);
 139                                 if ((item_format != null) && (item_format.Name != DataFormats.StringFormat)) {
 140                                         native_format = item_format.Id;
 141                                 }
 142
 143                                 XplatUI.ClipboardStore(clipboard_handle, data, native_format, converter);
 144                         }
 145                         XplatUI.ClipboardClose(clipboard_handle);
 146                 }
 147                 #endregion      // Public Static Methods
 148         }
 149 }