motif_l/m_copypaste.c

   1 /*-
   2  * Copyright (c) 1996
   3  *      Rob Zimmermann.  All rights reserved.
   4  * Copyright (c) 1996
   5  *      Keith Bostic.  All rights reserved.
   6  *
   7  * See the LICENSE file for redistribution information.
   8  */
   9
  10 #include "config.h"
  11
  12 #ifndef lint
  13 static const char sccsid[] = "$Id: m_copypaste.c,v 8.6 1996/12/10 21:05:15 bostic Exp $ (Berkeley) $Date: 1996/12/10 21:05:15 $";
  14 #endif /* not lint */
  15
  16 /* ICCCM Cut and paste Utilities: */
  17
  18 #include        <stdio.h>
  19 #include        <X11/X.h>
  20 #include        <X11/Intrinsic.h>
  21 #include        <X11/Xatom.h>
  22
  23 typedef int     (*PFI)();
  24
  25 static  PFI     icccm_paste,
  26                 icccm_copy,
  27                 icccm_clear,
  28                 icccm_error;
  29
  30 /*
  31  * InitCopyPaste --
  32  *
  33  * PUBLIC: void __vi_InitCopyPaste
  34  * PUBLIC:    __P((int (*)(), int (*)(), int (*)(), int (*)()));
  35  */
  36 void
  37 __vi_InitCopyPaste(f_copy, f_paste, f_clear, f_error)
  38         PFI f_copy, f_paste, f_clear, f_error;
  39 {
  40     icccm_paste = f_paste;
  41     icccm_clear = f_clear;
  42     icccm_copy  = f_copy;
  43     icccm_error = f_error;
  44 }
  45
  46
  47 #if defined(__STDC__)
  48 static  void    peekProc( Widget widget,
  49                           void *data,
  50                           Atom *selection,
  51                           Atom *type,
  52                           void *value,
  53                           unsigned long *length,
  54                           int *format
  55                           )
  56 #else
  57 static  void    peekProc( widget, data, selection, type, value, length, format )
  58         Widget  widget;
  59         void    *data;
  60         Atom    *selection, *type;
  61         void    *value;
  62         unsigned long *length;
  63         int     *format;
  64 #endif
  65 {
  66     if ( *type == 0 )
  67         (*icccm_error)( stderr, "Nothing in the primary selection buffer");
  68     else if ( *type != XA_STRING )
  69         (*icccm_error)( stderr, "Unknown type return from selection");
  70     else
  71         XtFree( value );
  72 }
  73
  74
  75 #ifdef 0
  76 #if defined(__STDC__)
  77 void    _vi_AcquireClipboard( Widget wid )
  78 #else
  79 void    _vi_AcquireClipboard( wid )
  80 Widget  wid;
  81 #endif
  82 {
  83     XtGetSelectionValue( wid,
  84                          XA_PRIMARY,
  85                          XA_STRING,
  86                          (XtSelectionCallbackProc) peekProc,
  87                          NULL,
  88                          XtLastTimestampProcessed( XtDisplay(wid) )
  89                          );
  90 }
  91 #endif
  92
  93
  94 #if defined(__STDC__)
  95 static  void    loseProc( Widget widget )
  96 #else
  97 static  void    loseProc( widget )
  98         Widget  widget;
  99 #endif
 100 {
 101     /* we have lost ownership of the selection.  clear it */
 102     (*icccm_clear)( widget );
 103
 104     /* also participate in the protocols */
 105     XtDisownSelection(  widget,
 106                         XA_PRIMARY,
 107                         XtLastTimestampProcessed( XtDisplay(widget) )
 108                         );
 109 }
 110
 111
 112 #if defined(__STDC__)
 113 static  int convertProc( Widget widget,
 114                      Atom *selection,
 115                      Atom *target,
 116                      Atom *type,
 117                      void **value,
 118                      int *length,
 119                      int *format
 120                      )
 121 #else
 122 static  int convertProc( widget, selection, target, type, value, length, format )
 123 Widget  widget;
 124 Atom    *selection, *target, *type;
 125 void    **value;
 126 int     *length;
 127 int     *format;
 128 #endif
 129 {
 130     String      buffer;
 131     int         len;
 132
 133     /* someone wants a copy of the selection.  is there one? */
 134     (*icccm_copy)( &buffer, &len );
 135     if ( len == 0 ) return False;
 136
 137     /* do they want the string? */
 138     if ( *target == XA_STRING ) {
 139         *length = len;
 140         *value  = (void *) XtMalloc( len );
 141         *type   = XA_STRING;
 142         *format = 8;
 143         memcpy( (char *) *value, buffer, *length );
 144         return True;
 145         }
 146
 147     /* do they want the length? */
 148     if ( *target == XInternAtom( XtDisplay(widget), "LENGTH", FALSE) ) {
 149         *length = 1;
 150         *value  = (void *) XtMalloc( sizeof(int) );
 151         *type   = *target;
 152         *format = 32;
 153         * ((int *) *value) = len;
 154         return True;
 155         }
 156
 157     /* we lose */
 158     return False;
 159 }
 160
 161 /*
 162  * __vi_AcquirePrimary --
 163  *
 164  * PUBLIC: void __vi_AcquirePrimary __P((Widget));
 165  */
 166 void
 167 __vi_AcquirePrimary(widget)
 168         Widget widget;
 169 {
 170     /* assert we own the primary selection */
 171     XtOwnSelection( widget,
 172                     XA_PRIMARY,
 173                     XtLastTimestampProcessed( XtDisplay(widget) ),
 174                     (XtConvertSelectionProc) convertProc,
 175                     (XtLoseSelectionProc) loseProc,
 176                     NULL
 177                     );
 178
 179 #if defined(OPENLOOK)
 180     /* assert we also own the clipboard */
 181     XtOwnSelection( widget,
 182                     XA_CLIPBOARD( XtDisplay(widget) ),
 183                     XtLastTimestampProcessed( XtDisplay(widget) ),
 184                     convertProc,
 185                     loseProc,
 186                     NULL
 187                     );
 188 #endif
 189 }
 190
 191
 192 #if defined(__STDC__)
 193 static  void    gotProc( Widget widget,
 194                          void *data,
 195                          Atom *selection,
 196                          Atom *type,
 197                          void *value,
 198                          unsigned long *length,
 199                          int *format
 200                          )
 201 #else
 202 static  void    gotProc( widget, data, selection, type, value, length, format )
 203         Widget  widget;
 204         void    *data;
 205         Atom    *selection, *type;
 206         void    *value;
 207         unsigned long *length;
 208         int     *format;
 209 #endif
 210 {
 211     if ( *type == 0 )
 212         (*icccm_error)( stderr, "Nothing in the primary selection buffer");
 213     else if ( *type != XA_STRING )
 214         (*icccm_error)( stderr, "Unknown type return from selection");
 215     else {
 216         (*icccm_paste)( widget, value, *length );
 217         XtFree( value );
 218     }
 219 }
 220
 221 /*
 222  * __vi_PasteFromClipboard --
 223  *
 224  * PUBLIC: void __vi_PasteFromClipboard __P((Widget));
 225  */
 226 void
 227 __vi_PasteFromClipboard(widget)
 228         Widget widget;
 229 {
 230     XtGetSelectionValue( widget,
 231                          XA_PRIMARY,
 232                          XA_STRING,
 233                          (XtSelectionCallbackProc) gotProc,
 234                          NULL,
 235                          XtLastTimestampProcessed( XtDisplay(widget) )
 236                          );
 237 }