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/* -*- c-basic-offset: 8 -*- |
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rdesktop: A Remote Desktop Protocol client. |
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Protocol services - Clipboard functions |
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Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003 |
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Copyright (C) Matthew Chapman 2003 |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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#include <X11/Xlib.h> |
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#include <X11/Xatom.h> |
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#include "rdesktop.h" |
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|
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#define NUM_TARGETS 6 |
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|
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extern Display *g_display; |
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extern Window g_wnd; |
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extern Time g_last_gesturetime; |
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|
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static Atom clipboard_atom, primary_atom, targets_atom, timestamp_atom; |
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static Atom rdesktop_clipboard_target_atom, rdesktop_clipboard_formats_atom, incr_atom; |
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static XSelectionRequestEvent selection_request; |
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static Atom targets[NUM_TARGETS]; |
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static int have_primary = 0; |
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static int rdesktop_is_selection_owner = 0; |
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|
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|
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/* Replace CR-LF to LF (well, rather removing all CR:s) This is done |
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in-place. The length is updated. Handles embedded nulls */ |
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static void |
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crlf2lf(uint8 * data, uint32 * length) |
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{ |
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uint8 *dst, *src; |
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src = dst = data; |
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while (src < data + *length) |
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{ |
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if (*src != '\x0d') |
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*dst++ = *src; |
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src++; |
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} |
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*length = dst - data; |
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} |
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|
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/* Translate LF to CR-LF. To do this, we must allocate more memory. |
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The length is updated. */ |
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static uint8 * |
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lf2crlf(uint8 * data, uint32 * length) |
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{ |
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uint8 *result, *p, *o; |
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|
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/* Worst case: Every char is LF */ |
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result = xmalloc(*length * 2); |
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|
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p = data; |
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o = result; |
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|
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while (p < data + *length) |
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{ |
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if (*p == '\x0a') |
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*o++ = '\x0d'; |
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*o++ = *p++; |
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} |
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*length = o - result; |
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|
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/* Convenience */ |
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*o++ = '\0'; |
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|
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return result; |
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} |
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|
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|
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static void |
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xclip_provide_selection(XSelectionRequestEvent * req, Atom type, unsigned int format, uint8 * data, |
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uint32 length) |
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{ |
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XEvent xev; |
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|
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XChangeProperty(g_display, req->requestor, req->property, |
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type, format, PropModeReplace, data, length); |
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|
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xev.xselection.type = SelectionNotify; |
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xev.xselection.serial = 0; |
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xev.xselection.send_event = True; |
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xev.xselection.requestor = req->requestor; |
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xev.xselection.selection = req->selection; |
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xev.xselection.target = req->target; |
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xev.xselection.property = req->property; |
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xev.xselection.time = req->time; |
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XSendEvent(g_display, req->requestor, False, NoEventMask, &xev); |
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} |
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|
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void |
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xclip_handle_SelectionNotify(XSelectionEvent * event) |
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{ |
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unsigned long nitems, bytes_left; |
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Atom type, best_target, text_target; |
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Atom *supported_targets; |
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int res, i, format; |
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uint8 *data; |
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|
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if (event->property == None) |
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goto fail; |
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|
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DEBUG_CLIPBOARD(("xclip_handle_SelectionNotify: selection=%s, target=%s, property=%s\n", |
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XGetAtomName(g_display, event->selection), |
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XGetAtomName(g_display, event->target), |
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XGetAtomName(g_display, event->property))); |
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|
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if (event->property == None) |
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goto fail; |
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|
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res = XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, |
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0, XMaxRequestSize(g_display), True, AnyPropertyType, |
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&type, &format, &nitems, &bytes_left, &data); |
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|
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if (res != Success) |
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{ |
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DEBUG_CLIPBOARD(("XGetWindowProperty failed!\n")); |
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goto fail; |
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} |
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|
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/* Negotiate target format */ |
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if (event->target == targets_atom) |
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{ |
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/* FIXME: We should choose format here based on what the server wanted */ |
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best_target = XA_STRING; |
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if (type != None) |
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{ |
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supported_targets = (Atom *) data; |
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text_target = XInternAtom(g_display, "TEXT", False); |
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for (i = 0; i < nitems; i++) |
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{ |
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DEBUG_CLIPBOARD(("Target %d: %s\n", i, |
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XGetAtomName(g_display, supported_targets[i]))); |
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if (supported_targets[i] == text_target) |
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{ |
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DEBUG_CLIPBOARD(("Other party supports TEXT, choosing that as best_target\n")); |
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best_target = text_target; |
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break; |
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} |
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} |
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XFree(data); |
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} |
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|
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XConvertSelection(g_display, primary_atom, best_target, |
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rdesktop_clipboard_target_atom, g_wnd, event->time); |
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return; |
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} |
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|
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if (type == incr_atom) |
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{ |
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warning("We don't support INCR transfers at this time. Try cutting less data.\n"); |
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goto fail; |
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} |
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|
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/* Translate linebreaks, but only if not getting data from |
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other rdesktop instance */ |
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if (event->target != rdesktop_clipboard_formats_atom) |
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{ |
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uint8 *translated_data; |
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uint32 length = nitems; |
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|
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DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n")); |
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translated_data = lf2crlf(data, &length); |
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cliprdr_send_data(translated_data, length + 1); |
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xfree(translated_data); /* Not the same thing as XFree! */ |
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} |
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else |
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{ |
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cliprdr_send_data(data, nitems + 1); |
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} |
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XFree(data); |
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|
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if (!rdesktop_is_selection_owner) |
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cliprdr_send_text_format_announce(); |
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return; |
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|
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fail: |
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cliprdr_send_data(NULL, 0); |
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} |
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|
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void |
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xclip_handle_SelectionRequest(XSelectionRequestEvent * event) |
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{ |
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unsigned long nitems, bytes_left; |
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unsigned char *prop_return; |
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uint32 *wanted_format; |
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int format, res; |
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Atom type; |
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|
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DEBUG_CLIPBOARD(("xclip_handle_SelectionRequest: selection=%s, target=%s, property=%s\n", |
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XGetAtomName(g_display, event->selection), |
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XGetAtomName(g_display, event->target), |
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XGetAtomName(g_display, event->property))); |
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|
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if (event->target == targets_atom) |
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{ |
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xclip_provide_selection(event, XA_ATOM, 32, (uint8 *) & targets, NUM_TARGETS); |
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return; |
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} |
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else if (event->target == timestamp_atom) |
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{ |
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xclip_provide_selection(event, XA_INTEGER, 32, (uint8 *) & g_last_gesturetime, 1); |
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return; |
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} |
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else if (event->target == rdesktop_clipboard_formats_atom) |
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{ |
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res = XGetWindowProperty(g_display, event->requestor, |
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rdesktop_clipboard_target_atom, 0, 1, True, XA_INTEGER, |
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&type, &format, &nitems, &bytes_left, &prop_return); |
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wanted_format = (uint32 *) prop_return; |
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format = (res == Success) ? *wanted_format : CF_TEXT; |
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/* FIXME: Need to free returned data? */ |
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} |
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else |
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{ |
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format = CF_TEXT; |
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} |
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|
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cliprdr_send_data_request(format); |
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selection_request = *event; |
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/* wait for data */ |
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} |
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|
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void |
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xclip_handle_SelectionClear(void) |
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{ |
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DEBUG_CLIPBOARD(("xclip_handle_SelectionClear\n")); |
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have_primary = 0; |
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XDeleteProperty(g_display, DefaultRootWindow(g_display), rdesktop_clipboard_formats_atom); |
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cliprdr_send_text_format_announce(); |
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} |
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|
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void |
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xclip_handle_PropertyNotify(XPropertyEvent * event) |
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{ |
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unsigned long nitems, bytes_left; |
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int format, res; |
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uint8 *data; |
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Atom type; |
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|
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if (event->atom != rdesktop_clipboard_formats_atom) |
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return; |
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|
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if (have_primary) /* from us */ |
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return; |
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|
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if (event->state == PropertyNewValue) |
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{ |
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res = XGetWindowProperty(g_display, DefaultRootWindow(g_display), |
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rdesktop_clipboard_formats_atom, 0, |
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XMaxRequestSize(g_display), False, XA_STRING, &type, |
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&format, &nitems, &bytes_left, &data); |
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|
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if ((res == Success) && (nitems > 0)) |
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{ |
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cliprdr_send_native_format_announce(data, nitems); |
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rdesktop_is_selection_owner = 1; |
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return; |
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} |
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} |
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|
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/* PropertyDelete, or XGetWindowProperty failed */ |
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cliprdr_send_text_format_announce(); |
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rdesktop_is_selection_owner = 0; |
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} |
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|
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|
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void |
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ui_clip_format_announce(uint8 * data, uint32 length) |
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{ |
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XSetSelectionOwner(g_display, primary_atom, g_wnd, g_last_gesturetime); |
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if (XGetSelectionOwner(g_display, primary_atom) != g_wnd) |
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{ |
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warning("Failed to aquire ownership of PRIMARY clipboard\n"); |
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return; |
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} |
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|
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have_primary = 1; |
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XChangeProperty(g_display, DefaultRootWindow(g_display), |
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rdesktop_clipboard_formats_atom, XA_STRING, 8, PropModeReplace, data, |
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length); |
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|
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XSetSelectionOwner(g_display, clipboard_atom, g_wnd, g_last_gesturetime); |
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if (XGetSelectionOwner(g_display, clipboard_atom) != g_wnd) |
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warning("Failed to aquire ownership of CLIPBOARD clipboard\n"); |
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} |
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|
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|
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void |
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ui_clip_handle_data(uint8 * data, uint32 length) |
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{ |
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if (selection_request.target != rdesktop_clipboard_formats_atom) |
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{ |
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uint8 *firstnull; |
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|
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/* translate linebreaks */ |
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crlf2lf(data, &length); |
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|
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/* Only send data up to null byte, if any */ |
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firstnull = (uint8 *) strchr((char *) data, '\0'); |
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if (firstnull) |
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{ |
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length = firstnull - data + 1; |
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} |
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} |
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|
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xclip_provide_selection(&selection_request, XA_STRING, 8, data, length - 1); |
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} |
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|
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void |
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ui_clip_request_data(uint32 format) |
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{ |
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Window selectionowner; |
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|
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DEBUG_CLIPBOARD(("Request from server for format %d\n", format)); |
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|
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if (rdesktop_is_selection_owner) |
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{ |
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XChangeProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, |
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XA_INTEGER, 32, PropModeReplace, (unsigned char *) &format, 1); |
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|
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XConvertSelection(g_display, primary_atom, rdesktop_clipboard_formats_atom, |
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rdesktop_clipboard_target_atom, g_wnd, CurrentTime); |
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return; |
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} |
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|
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selectionowner = XGetSelectionOwner(g_display, primary_atom); |
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if (selectionowner != None) |
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{ |
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XConvertSelection(g_display, primary_atom, targets_atom, |
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rdesktop_clipboard_target_atom, g_wnd, CurrentTime); |
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return; |
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} |
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|
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/* No PRIMARY, try CLIPBOARD */ |
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selectionowner = XGetSelectionOwner(g_display, clipboard_atom); |
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if (selectionowner != None) |
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{ |
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XConvertSelection(g_display, clipboard_atom, targets_atom, |
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rdesktop_clipboard_target_atom, g_wnd, CurrentTime); |
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return; |
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} |
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|
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/* No data available */ |
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cliprdr_send_data(NULL, 0); |
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} |
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|
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void |
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ui_clip_sync(void) |
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{ |
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cliprdr_send_text_format_announce(); |
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} |
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|
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|
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void |
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xclip_init(void) |
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{ |
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if (!cliprdr_init()) |
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return; |
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|
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primary_atom = XInternAtom(g_display, "PRIMARY", False); |
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clipboard_atom = XInternAtom(g_display, "CLIPBOARD", False); |
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targets_atom = XInternAtom(g_display, "TARGETS", False); |
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timestamp_atom = XInternAtom(g_display, "TIMESTAMP", False); |
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rdesktop_clipboard_target_atom = |
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XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_TARGET", False); |
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incr_atom = XInternAtom(g_display, "INCR", False); |
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targets[0] = targets_atom; |
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targets[1] = XInternAtom(g_display, "TEXT", False); |
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targets[2] = XInternAtom(g_display, "UTF8_STRING", False); |
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targets[3] = XInternAtom(g_display, "text/unicode", False); |
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targets[4] = XInternAtom(g_display, "TIMESTAMP", False); |
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targets[5] = XA_STRING; |
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|
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/* rdesktop sets _RDESKTOP_CLIPBOARD_FORMATS on the root window when acquiring the clipboard. |
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Other interested rdesktops can use this to notify their server of the available formats. */ |
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rdesktop_clipboard_formats_atom = |
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XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_FORMATS", False); |
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XSelectInput(g_display, DefaultRootWindow(g_display), PropertyChangeMask); |
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} |