/[rdesktop]/sourceforge.net/trunk/rdesktop/xclip.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 1026 by forsberg, Wed Nov 9 15:15:28 2005 UTC revision 1027 by forsberg, Mon Nov 14 14:11:42 2005 UTC
# Line 23  Line 23 
23  #include <X11/Xatom.h>  #include <X11/Xatom.h>
24  #include "rdesktop.h"  #include "rdesktop.h"
25    
26    /*
27      To gain better understanding of this code, one could be assisted by the following documents:
28      - Inter-Client Communication Conventions Manual (ICCCM)
29        HTML: http://tronche.com/gui/x/icccm/
30        PDF:  http://ftp.xfree86.org/pub/XFree86/4.5.0/doc/PDF/icccm.pdf
31      - MSDN: Clipboard Formats
32        http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface/dataexchange/clipboard/clipboardformats.asp
33    */
34    
35  #define NUM_TARGETS 6  #define NUM_TARGETS 6
36    
37  extern Display *g_display;  extern Display *g_display;
38  extern Window g_wnd;  extern Window g_wnd;
39  extern Time g_last_gesturetime;  extern Time g_last_gesturetime;
40    
41  static Atom clipboard_atom, primary_atom, targets_atom, timestamp_atom;  /* Atoms of the two X selections we're dealing with: CLIPBOARD (explicit-copy) and PRIMARY (selection-copy) */
42  static Atom rdesktop_clipboard_target_atom, rdesktop_clipboard_formats_atom, incr_atom;  static Atom clipboard_atom, primary_atom;
43    /* Atom of the TARGETS clipboard target */
44    static Atom targets_atom;
45    /* Atom of the TIMESTAMP clipboard target */
46    static Atom timestamp_atom;
47    /* Atom _RDESKTOP_CLIPBOARD_TARGET which has multiple uses:
48       - The 'property' argument in XConvertSelection calls: This is the property of our
49         window into which XConvertSelection will store the received clipboard data.
50       - In a clipboard request of target _RDESKTOP_CLIPBOARD_FORMATS, an XA_INTEGER-typed
51         property carrying the Windows native (CF_...) format desired by the requestor.
52         Requestor set this property (e.g. requestor_wnd[_RDESKTOP_CLIPBOARD_TARGET] = CF_TEXT)
53         before requesting clipboard data from a fellow rdesktop using
54         the _RDESKTOP_CLIPBOARD_FORMATS target. */
55    static Atom rdesktop_clipboard_target_atom;
56    /* Atom _RDESKTOP_CLIPBOARD_FORMATS which has multiple uses:
57       - The clipboard target (X jargon for "clipboard format") for rdesktop-to-rdesktop interchange
58         of Windows native clipboard data.
59         This target cannot be used standalone; the requestor must keep the
60         _RDESKTOP_CLIPBOARD_TARGET property on his window denoting
61         the Windows native clipboard format being requested.
62       - The root window property set by rdesktop when it owns the clipboard,
63         denoting all Windows native clipboard formats it offers via
64         requests of the _RDESKTOP_CLIPBOARD_FORMATS target. */
65    static Atom rdesktop_clipboard_formats_atom;
66    /* Atom of the INCR clipboard type (see ICCCM on "INCR Properties") */
67    static Atom incr_atom;
68    /* Stores the last "selection request" (= another X client requesting clipboard data from us).
69       To satisfy such a request, we request the clipboard data from the RDP server.
70       When we receive the response from the RDP server (asynchronously), this variable gives us
71       the context to proceed. */
72  static XSelectionRequestEvent selection_request;  static XSelectionRequestEvent selection_request;
73    /* Array of offered clipboard targets that will be sent to fellow X clients upon a TARGETS request. */
74  static Atom targets[NUM_TARGETS];  static Atom targets[NUM_TARGETS];
75    /* Denotes that this client currently holds the PRIMARY selection. */
76  static int have_primary = 0;  static int have_primary = 0;
77    /* Denotes that an rdesktop (not this rdesktop) is owning the selection,
78       allowing us to interchange Windows native clipboard data directly. */
79  static int rdesktop_is_selection_owner = 0;  static int rdesktop_is_selection_owner = 0;
80    
81    /* Denotes that an INCR ("chunked") transfer is in progress. */
82  static int g_waiting_for_INCR = 0;  static int g_waiting_for_INCR = 0;
83    /* Buffers an INCR transfer. */
84  static uint8 *g_clip_buffer = 0;  static uint8 *g_clip_buffer = 0;
85    /* Denotes the size of g_clip_buffer. */
86  static uint32 g_clip_buflen = 0;  static uint32 g_clip_buflen = 0;
87    
88  /* Replace CR-LF to LF (well, rather removing all CR:s) This is done  /* Translate LF to CR-LF. To do this, we must allocate more memory.
89     in-place. The length is updated. Handles embedded nulls */     The returned string is null-terminated, as required by CF_TEXT.
90       Does not stop on embedded nulls.
91       The length is updated. */
92  static void  static void
93  crlf2lf(uint8 * data, uint32 * length)  crlf2lf(uint8 * data, uint32 * length)
94  {  {
# Line 104  xclip_provide_selection(XSelectionReques Line 151  xclip_provide_selection(XSelectionReques
151          XSendEvent(g_display, req->requestor, False, NoEventMask, &xev);          XSendEvent(g_display, req->requestor, False, NoEventMask, &xev);
152  }  }
153    
154    /* This function is called for SelectionNotify events.
155       The SelectionNotify message is sent from the clipboard owner to the requestor
156       after his request was satisfied.
157       If this function is called, we're the requestor side. */
158  #ifndef MAKE_PROTO  #ifndef MAKE_PROTO
159  void  void
160  xclip_handle_SelectionNotify(XSelectionEvent * event)  xclip_handle_SelectionNotify(XSelectionEvent * event)
# Line 210  xclip_handle_SelectionNotify(XSelectionE Line 261  xclip_handle_SelectionNotify(XSelectionE
261          cliprdr_send_data(NULL, 0);          cliprdr_send_data(NULL, 0);
262  }  }
263    
264    /* This function is called for SelectionRequest events.
265       The SelectionRequest message is sent from the requestor to the clipboard owner
266       to request clipboard data.
267     */
268  void  void
269  xclip_handle_SelectionRequest(XSelectionRequestEvent * event)  xclip_handle_SelectionRequest(XSelectionRequestEvent * event)
270  {  {
# Line 253  xclip_handle_SelectionRequest(XSelection Line 308  xclip_handle_SelectionRequest(XSelection
308          /* wait for data */          /* wait for data */
309  }  }
310    
311    /* When this rdesktop holds ownership over the clipboard, it means the clipboard data
312       is offered by the RDP server (and when its pasted inside RDP, there's no network
313       roundtrip). This event symbolizes this rdesktop lost onwership of the clipboard
314       to some other X client. We should find out what clipboard formats this other
315       client offers and announce that to RDP. */
316  void  void
317  xclip_handle_SelectionClear(void)  xclip_handle_SelectionClear(void)
318  {  {
# Line 262  xclip_handle_SelectionClear(void) Line 322  xclip_handle_SelectionClear(void)
322          cliprdr_send_simple_native_format_announce(CF_TEXT);          cliprdr_send_simple_native_format_announce(CF_TEXT);
323  }  }
324    
325    /* Called when any property changes in our window or the root window. */
326  void  void
327  xclip_handle_PropertyNotify(XPropertyEvent * event)  xclip_handle_PropertyNotify(XPropertyEvent * event)
328  {  {
# Line 359  xclip_handle_PropertyNotify(XPropertyEve Line 420  xclip_handle_PropertyNotify(XPropertyEve
420  #endif  #endif
421    
422    
423    /* Called when the RDP server announces new clipboard data formats.
424       In response, we:
425       - take ownership over the clipboard
426       - declare those formats in their Windows native form
427         to other rdesktop instances on this X server */
428  void  void
429  ui_clip_format_announce(uint8 * data, uint32 length)  ui_clip_format_announce(uint8 * data, uint32 length)
430  {  {
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