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#include <X11/Xatom.h> |
#include <X11/Xatom.h> |
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#include "rdesktop.h" |
#include "rdesktop.h" |
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/* |
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To gain better understanding of this code, one could be assisted by the following documents: |
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- Inter-Client Communication Conventions Manual (ICCCM) |
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HTML: http://tronche.com/gui/x/icccm/ |
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PDF: http://ftp.xfree86.org/pub/XFree86/4.5.0/doc/PDF/icccm.pdf |
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- MSDN: Clipboard Formats |
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http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface/dataexchange/clipboard/clipboardformats.asp |
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*/ |
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#define NUM_TARGETS 6 |
#define NUM_TARGETS 6 |
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extern Display *g_display; |
extern Display *g_display; |
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extern Window g_wnd; |
extern Window g_wnd; |
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extern Time g_last_gesturetime; |
extern Time g_last_gesturetime; |
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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) */ |
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static Atom rdesktop_clipboard_target_atom, rdesktop_clipboard_formats_atom, incr_atom; |
static Atom clipboard_atom, primary_atom; |
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/* Atom of the TARGETS clipboard target */ |
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static Atom targets_atom; |
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/* Atom of the TIMESTAMP clipboard target */ |
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static Atom timestamp_atom; |
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/* Atom _RDESKTOP_CLIPBOARD_TARGET which has multiple uses: |
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- The 'property' argument in XConvertSelection calls: This is the property of our |
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window into which XConvertSelection will store the received clipboard data. |
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- In a clipboard request of target _RDESKTOP_CLIPBOARD_FORMATS, an XA_INTEGER-typed |
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property carrying the Windows native (CF_...) format desired by the requestor. |
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Requestor set this property (e.g. requestor_wnd[_RDESKTOP_CLIPBOARD_TARGET] = CF_TEXT) |
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before requesting clipboard data from a fellow rdesktop using |
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the _RDESKTOP_CLIPBOARD_FORMATS target. */ |
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static Atom rdesktop_clipboard_target_atom; |
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/* Atom _RDESKTOP_CLIPBOARD_FORMATS which has multiple uses: |
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- The clipboard target (X jargon for "clipboard format") for rdesktop-to-rdesktop interchange |
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of Windows native clipboard data. |
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This target cannot be used standalone; the requestor must keep the |
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_RDESKTOP_CLIPBOARD_TARGET property on his window denoting |
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the Windows native clipboard format being requested. |
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- The root window property set by rdesktop when it owns the clipboard, |
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denoting all Windows native clipboard formats it offers via |
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requests of the _RDESKTOP_CLIPBOARD_FORMATS target. */ |
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static Atom rdesktop_clipboard_formats_atom; |
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/* Atom of the INCR clipboard type (see ICCCM on "INCR Properties") */ |
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static Atom incr_atom; |
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/* Stores the last "selection request" (= another X client requesting clipboard data from us). |
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To satisfy such a request, we request the clipboard data from the RDP server. |
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When we receive the response from the RDP server (asynchronously), this variable gives us |
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the context to proceed. */ |
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static XSelectionRequestEvent selection_request; |
static XSelectionRequestEvent selection_request; |
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/* Array of offered clipboard targets that will be sent to fellow X clients upon a TARGETS request. */ |
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static Atom targets[NUM_TARGETS]; |
static Atom targets[NUM_TARGETS]; |
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/* Denotes that this client currently holds the PRIMARY selection. */ |
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static int have_primary = 0; |
static int have_primary = 0; |
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/* Denotes that an rdesktop (not this rdesktop) is owning the selection, |
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allowing us to interchange Windows native clipboard data directly. */ |
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static int rdesktop_is_selection_owner = 0; |
static int rdesktop_is_selection_owner = 0; |
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/* Denotes that an INCR ("chunked") transfer is in progress. */ |
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static int g_waiting_for_INCR = 0; |
static int g_waiting_for_INCR = 0; |
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/* Buffers an INCR transfer. */ |
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static uint8 *g_clip_buffer = 0; |
static uint8 *g_clip_buffer = 0; |
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/* Denotes the size of g_clip_buffer. */ |
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static uint32 g_clip_buflen = 0; |
static uint32 g_clip_buflen = 0; |
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/* 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. |
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in-place. The length is updated. Handles embedded nulls */ |
The returned string is null-terminated, as required by CF_TEXT. |
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Does not stop on embedded nulls. |
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The length is updated. */ |
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static void |
static void |
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crlf2lf(uint8 * data, uint32 * length) |
crlf2lf(uint8 * data, uint32 * length) |
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{ |
{ |
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XSendEvent(g_display, req->requestor, False, NoEventMask, &xev); |
XSendEvent(g_display, req->requestor, False, NoEventMask, &xev); |
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} |
} |
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/* This function is called for SelectionNotify events. |
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The SelectionNotify message is sent from the clipboard owner to the requestor |
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after his request was satisfied. |
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If this function is called, we're the requestor side. */ |
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#ifndef MAKE_PROTO |
#ifndef MAKE_PROTO |
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void |
void |
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xclip_handle_SelectionNotify(XSelectionEvent * event) |
xclip_handle_SelectionNotify(XSelectionEvent * event) |
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XFree(data); |
XFree(data); |
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g_waiting_for_INCR = 1; |
g_waiting_for_INCR = 1; |
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return; |
return; |
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} |
} |
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XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_target_atom); |
XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_target_atom); |
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/* Negotiate target format */ |
/* Negotiate target format */ |
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if (event->target == targets_atom) |
if (event->target == targets_atom) |
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{ |
{ |
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cliprdr_send_simple_native_format_announce(CF_TEXT); |
cliprdr_send_simple_native_format_announce(CF_TEXT); |
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return; |
return; |
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|
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fail: |
fail: |
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XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_target_atom); |
XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_target_atom); |
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XFree(data); |
XFree(data); |
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cliprdr_send_data(NULL, 0); |
cliprdr_send_data(NULL, 0); |
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} |
} |
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/* This function is called for SelectionRequest events. |
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The SelectionRequest message is sent from the requestor to the clipboard owner |
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to request clipboard data. |
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*/ |
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void |
void |
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xclip_handle_SelectionRequest(XSelectionRequestEvent * event) |
xclip_handle_SelectionRequest(XSelectionRequestEvent * event) |
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{ |
{ |
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/* wait for data */ |
/* wait for data */ |
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} |
} |
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/* When this rdesktop holds ownership over the clipboard, it means the clipboard data |
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is offered by the RDP server (and when its pasted inside RDP, there's no network |
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roundtrip). This event symbolizes this rdesktop lost onwership of the clipboard |
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to some other X client. We should find out what clipboard formats this other |
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client offers and announce that to RDP. */ |
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void |
void |
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xclip_handle_SelectionClear(void) |
xclip_handle_SelectionClear(void) |
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{ |
{ |
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cliprdr_send_simple_native_format_announce(CF_TEXT); |
cliprdr_send_simple_native_format_announce(CF_TEXT); |
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} |
} |
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/* Called when any property changes in our window or the root window. */ |
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void |
void |
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xclip_handle_PropertyNotify(XPropertyEvent * event) |
xclip_handle_PropertyNotify(XPropertyEvent * event) |
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{ |
{ |
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unsigned long nitems; |
unsigned long nitems; |
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unsigned long offset = 0; |
unsigned long offset = 0; |
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unsigned long bytes_left = 1; |
unsigned long bytes_left = 1; |
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int format, res; |
int format, res; |
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{ |
{ |
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DEBUG_CLIPBOARD(("x_clip_handle_PropertyNotify: g_waiting_for_INCR != 0\n")); |
DEBUG_CLIPBOARD(("x_clip_handle_PropertyNotify: g_waiting_for_INCR != 0\n")); |
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while (bytes_left > 0) { |
while (bytes_left > 0) |
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if ((XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, offset, |
{ |
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4096L, False, AnyPropertyType, |
if ((XGetWindowProperty |
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&type, &format, &nitems, &bytes_left, &data) != Success)) |
(g_display, g_wnd, rdesktop_clipboard_target_atom, offset, 4096L, |
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False, AnyPropertyType, &type, &format, &nitems, &bytes_left, |
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&data) != Success)) |
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{ |
{ |
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XFree(data); |
XFree(data); |
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return; |
return; |
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if (nitems == 0) |
if (nitems == 0) |
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{ |
{ |
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XGetWindowAttributes(g_display, g_wnd, &wa); |
XGetWindowAttributes(g_display, g_wnd, &wa); |
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XSelectInput(g_display, g_wnd, (wa.your_event_mask ^ PropertyChangeMask)); |
XSelectInput(g_display, g_wnd, |
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(wa.your_event_mask ^ PropertyChangeMask)); |
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XFree(data); |
XFree(data); |
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g_waiting_for_INCR = 0; |
g_waiting_for_INCR = 0; |
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uint32 length = nitems; |
uint32 length = nitems; |
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uint8 *tmp; |
uint8 *tmp; |
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offset += (length/4); |
offset += (length / 4); |
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DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n")); |
DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n")); |
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translated_data = lf2crlf(data, &length); |
translated_data = lf2crlf(data, &length); |
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strncpy((char *) tmp, (char *) g_clip_buffer, g_clip_buflen); |
strncpy((char *) tmp, (char *) g_clip_buffer, g_clip_buflen); |
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xfree(g_clip_buffer); |
xfree(g_clip_buffer); |
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strncpy((char *) (tmp + g_clip_buflen), (char *) translated_data, length); |
strncpy((char *) (tmp + g_clip_buflen), (char *) translated_data, |
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length); |
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xfree(translated_data); |
xfree(translated_data); |
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g_clip_buffer = tmp; |
g_clip_buffer = tmp; |
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#endif |
#endif |
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/* Called when the RDP server announces new clipboard data formats. |
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In response, we: |
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- take ownership over the clipboard |
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- declare those formats in their Windows native form |
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to other rdesktop instances on this X server */ |
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void |
void |
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ui_clip_format_announce(uint8 * data, uint32 length) |
ui_clip_format_announce(uint8 * data, uint32 length) |
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{ |
{ |