--- /dev/null
+/* X Selection processing for XEmacs
+ Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
+
+This file is part of XEmacs.
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/* Synched up with: Not synched with FSF. */
+
+/* Rewritten by jwz */
+
+#include <config.h>
+#include "lisp.h"
+
+#include "buffer.h"
+#include "console-x.h"
+#include "objects-x.h"
+
+#include "frame.h"
+#include "opaque.h"
+#include "systime.h"
+#include "select.h"
+
+int lisp_to_time (Lisp_Object, time_t *);
+Lisp_Object time_to_lisp (time_t);
+
+#ifdef LWLIB_USES_MOTIF
+# define MOTIF_CLIPBOARDS
+#endif
+
+#ifdef MOTIF_CLIPBOARDS
+# include <Xm/CutPaste.h>
+static void hack_motif_clipboard_selection (Atom selection_atom,
+ Lisp_Object selection_value,
+ Time thyme, Display *display,
+ Window selecting_window);
+#endif
+
+#define CUT_BUFFER_SUPPORT
+
+#ifdef CUT_BUFFER_SUPPORT
+Lisp_Object QCUT_BUFFER0, QCUT_BUFFER1, QCUT_BUFFER2, QCUT_BUFFER3,
+ QCUT_BUFFER4, QCUT_BUFFER5, QCUT_BUFFER6, QCUT_BUFFER7;
+#endif
+
+Lisp_Object Vx_sent_selection_hooks;
+
+/* If this is a smaller number than the max-request-size of the display,
+ emacs will use INCR selection transfer when the selection is larger
+ than this. The max-request-size is usually around 64k, so if you want
+ emacs to use incremental selection transfers when the selection is
+ smaller than that, set this. I added this mostly for debugging the
+ incremental transfer stuff, but it might improve server performance.
+ */
+#define MAX_SELECTION_QUANTUM 0xFFFFFF
+
+#define SELECTION_QUANTUM(dpy) ((XMaxRequestSize (dpy) << 2) - 100)
+
+/* If the selection owner takes too long to reply to a selection request,
+ we give up on it. This is in seconds (0 = no timeout).
+ */
+int x_selection_timeout;
+
+\f
+/* Utility functions */
+
+static void lisp_data_to_selection_data (struct device *,
+ Lisp_Object obj,
+ unsigned char **data_ret,
+ Atom *type_ret,
+ unsigned int *size_ret,
+ int *format_ret);
+static Lisp_Object selection_data_to_lisp_data (struct device *,
+ unsigned char *data,
+ size_t size,
+ Atom type,
+ int format);
+static Lisp_Object x_get_window_property_as_lisp_data (Display *,
+ Window,
+ Atom property,
+ Lisp_Object target_type,
+ Atom selection_atom);
+
+static int expect_property_change (Display *, Window, Atom prop, int state);
+static void wait_for_property_change (long);
+static void unexpect_property_change (int);
+static int waiting_for_other_props_on_window (Display *, Window);
+
+/* This converts a Lisp symbol to a server Atom, avoiding a server
+ roundtrip whenever possible.
+ */
+static Atom
+symbol_to_x_atom (struct device *d, Lisp_Object sym, int only_if_exists)
+{
+ Display *display = DEVICE_X_DISPLAY (d);
+
+ if (NILP (sym)) return XA_PRIMARY;
+ if (EQ (sym, Qt)) return XA_SECONDARY;
+ if (EQ (sym, QPRIMARY)) return XA_PRIMARY;
+ if (EQ (sym, QSECONDARY)) return XA_SECONDARY;
+ if (EQ (sym, QSTRING)) return XA_STRING;
+ if (EQ (sym, QINTEGER)) return XA_INTEGER;
+ if (EQ (sym, QATOM)) return XA_ATOM;
+ if (EQ (sym, QCLIPBOARD)) return DEVICE_XATOM_CLIPBOARD (d);
+ if (EQ (sym, QTIMESTAMP)) return DEVICE_XATOM_TIMESTAMP (d);
+ if (EQ (sym, QTEXT)) return DEVICE_XATOM_TEXT (d);
+ if (EQ (sym, QDELETE)) return DEVICE_XATOM_DELETE (d);
+ if (EQ (sym, QMULTIPLE)) return DEVICE_XATOM_MULTIPLE (d);
+ if (EQ (sym, QINCR)) return DEVICE_XATOM_INCR (d);
+ if (EQ (sym, QEMACS_TMP)) return DEVICE_XATOM_EMACS_TMP (d);
+ if (EQ (sym, QTARGETS)) return DEVICE_XATOM_TARGETS (d);
+ if (EQ (sym, QNULL)) return DEVICE_XATOM_NULL (d);
+ if (EQ (sym, QATOM_PAIR)) return DEVICE_XATOM_ATOM_PAIR (d);
+ if (EQ (sym, QCOMPOUND_TEXT)) return DEVICE_XATOM_COMPOUND_TEXT (d);
+
+#ifdef CUT_BUFFER_SUPPORT
+ if (EQ (sym, QCUT_BUFFER0)) return XA_CUT_BUFFER0;
+ if (EQ (sym, QCUT_BUFFER1)) return XA_CUT_BUFFER1;
+ if (EQ (sym, QCUT_BUFFER2)) return XA_CUT_BUFFER2;
+ if (EQ (sym, QCUT_BUFFER3)) return XA_CUT_BUFFER3;
+ if (EQ (sym, QCUT_BUFFER4)) return XA_CUT_BUFFER4;
+ if (EQ (sym, QCUT_BUFFER5)) return XA_CUT_BUFFER5;
+ if (EQ (sym, QCUT_BUFFER6)) return XA_CUT_BUFFER6;
+ if (EQ (sym, QCUT_BUFFER7)) return XA_CUT_BUFFER7;
+#endif /* CUT_BUFFER_SUPPORT */
+
+ {
+ CONST char *nameext;
+ GET_C_STRING_CTEXT_DATA_ALLOCA (Fsymbol_name (sym), nameext);
+ return XInternAtom (display, nameext, only_if_exists ? True : False);
+ }
+}
+
+
+/* This converts a server Atom to a Lisp symbol, avoiding server roundtrips
+ and calls to intern whenever possible.
+ */
+static Lisp_Object
+x_atom_to_symbol (struct device *d, Atom atom)
+{
+ Display *display = DEVICE_X_DISPLAY (d);
+
+ if (! atom) return Qnil;
+ if (atom == XA_PRIMARY) return QPRIMARY;
+ if (atom == XA_SECONDARY) return QSECONDARY;
+ if (atom == XA_STRING) return QSTRING;
+ if (atom == XA_INTEGER) return QINTEGER;
+ if (atom == XA_ATOM) return QATOM;
+ if (atom == DEVICE_XATOM_CLIPBOARD (d)) return QCLIPBOARD;
+ if (atom == DEVICE_XATOM_TIMESTAMP (d)) return QTIMESTAMP;
+ if (atom == DEVICE_XATOM_TEXT (d)) return QTEXT;
+ if (atom == DEVICE_XATOM_DELETE (d)) return QDELETE;
+ if (atom == DEVICE_XATOM_MULTIPLE (d)) return QMULTIPLE;
+ if (atom == DEVICE_XATOM_INCR (d)) return QINCR;
+ if (atom == DEVICE_XATOM_EMACS_TMP (d)) return QEMACS_TMP;
+ if (atom == DEVICE_XATOM_TARGETS (d)) return QTARGETS;
+ if (atom == DEVICE_XATOM_NULL (d)) return QNULL;
+ if (atom == DEVICE_XATOM_ATOM_PAIR (d)) return QATOM_PAIR;
+ if (atom == DEVICE_XATOM_COMPOUND_TEXT (d)) return QCOMPOUND_TEXT;
+
+#ifdef CUT_BUFFER_SUPPORT
+ if (atom == XA_CUT_BUFFER0) return QCUT_BUFFER0;
+ if (atom == XA_CUT_BUFFER1) return QCUT_BUFFER1;
+ if (atom == XA_CUT_BUFFER2) return QCUT_BUFFER2;
+ if (atom == XA_CUT_BUFFER3) return QCUT_BUFFER3;
+ if (atom == XA_CUT_BUFFER4) return QCUT_BUFFER4;
+ if (atom == XA_CUT_BUFFER5) return QCUT_BUFFER5;
+ if (atom == XA_CUT_BUFFER6) return QCUT_BUFFER6;
+ if (atom == XA_CUT_BUFFER7) return QCUT_BUFFER7;
+#endif
+
+ {
+ Lisp_Object newsym;
+ CONST Bufbyte *intstr;
+ char *str = XGetAtomName (display, atom);
+
+ if (! str) return Qnil;
+
+ GET_C_CHARPTR_INT_CTEXT_DATA_ALLOCA (str, intstr);
+ newsym = intern ((char *) intstr);
+ XFree (str);
+ return newsym;
+ }
+}
+
+\f
+/* Do protocol to assert ourself as a selection owner.
+ Update the Vselection_alist so that we can reply to later requests for
+ our selection.
+ */
+static Lisp_Object
+x_own_selection (Lisp_Object selection_name, Lisp_Object selection_value)
+{
+ struct device *d = decode_x_device (Qnil);
+ Display *display = DEVICE_X_DISPLAY (d);
+ struct frame *sel_frame = selected_frame ();
+ Window selecting_window = XtWindow (FRAME_X_TEXT_WIDGET (sel_frame));
+ Lisp_Object selection_time;
+ /* Use the time of the last-read mouse or keyboard event.
+ For selection purposes, we use this as a sleazy way of knowing what the
+ current time is in server-time. This assumes that the most recently read
+ mouse or keyboard event has something to do with the assertion of the
+ selection, which is probably true.
+ */
+ Time thyme = DEVICE_X_MOUSE_TIMESTAMP (d);
+ Atom selection_atom;
+
+ CHECK_SYMBOL (selection_name);
+ selection_atom = symbol_to_x_atom (d, selection_name, 0);
+
+ XSetSelectionOwner (display, selection_atom, selecting_window, thyme);
+
+ /* We do NOT use time_to_lisp() here any more, like we used to.
+ That assumed equivalence of time_t and Time, which is not
+ necessarily the case (e.g. under OSF on the Alphas, where
+ Time is a 64-bit quantity and time_t is a 32-bit quantity).
+
+ Opaque pointers are the clean way to go here.
+ */
+ selection_time = make_opaque (sizeof (thyme), (void *) &thyme);
+
+#ifdef MOTIF_CLIPBOARDS
+ hack_motif_clipboard_selection (selection_atom, selection_value,
+ thyme, display, selecting_window);
+#endif
+ return selection_time;
+}
+
+#ifdef MOTIF_CLIPBOARDS /* Bend over baby. Take it and like it. */
+
+# ifdef MOTIF_INCREMENTAL_CLIPBOARDS_WORK
+static void motif_clipboard_cb ();
+# endif
+
+static void
+hack_motif_clipboard_selection (Atom selection_atom,
+ Lisp_Object selection_value,
+ Time thyme,
+ Display *display,
+ Window selecting_window)
+ /* Bool owned_p)*/
+{
+ struct device *d = get_device_from_display (display);
+ /* Those Motif wankers can't be bothered to follow the ICCCM, and do
+ their own non-Xlib non-Xt clipboard processing. So we have to do
+ this so that linked-in Motif widgets don't get themselves wedged.
+ */
+ if (selection_atom == DEVICE_XATOM_CLIPBOARD (d)
+ && STRINGP (selection_value)
+
+ /* If we already own the clipboard, don't own it again in the Motif
+ way. This might lose in some subtle way, since the timestamp won't
+ be current, but owning the selection on the Motif way does a
+ SHITLOAD of X protocol, and it makes killing text be incredibly
+ slow when using an X terminal. ARRRRGGGHHH!!!!
+ */
+ /* No, this is no good, because then Motif text fields don't bother
+ to look up the new value, and you can't Copy from a buffer, Paste
+ into a text field, then Copy something else from the buffer and
+ paste it into the text field -- it pastes the first thing again. */
+/* && !owned_p */
+ )
+ {
+#ifdef MOTIF_INCREMENTAL_CLIPBOARDS_WORK
+ Widget widget = FRAME_X_TEXT_WIDGET (selected_frame());
+#endif
+ long itemid;
+#if XmVersion >= 1002
+ long dataid;
+#else
+ int dataid; /* 1.2 wants long, but 1.1.5 wants int... */
+#endif
+ XmString fmh;
+ String encoding = "STRING";
+ CONST Extbyte *data = XSTRING_DATA (selection_value);
+ Extcount bytes = XSTRING_LENGTH (selection_value);
+
+#ifdef MULE
+ {
+ enum { ASCII, LATIN_1, WORLD } chartypes = ASCII;
+ CONST Bufbyte *ptr = data, *end = ptr + bytes;
+ /* Optimize for the common ASCII case */
+ while (ptr <= end)
+ {
+ if (BYTE_ASCII_P (*ptr))
+ {
+ ptr++;
+ continue;
+ }
+
+ if ((*ptr) == LEADING_BYTE_LATIN_ISO8859_1 ||
+ (*ptr) == LEADING_BYTE_CONTROL_1)
+ {
+ chartypes = LATIN_1;
+ ptr += 2;
+ continue;
+ }
+
+ chartypes = WORLD;
+ break;
+ }
+
+ if (chartypes == LATIN_1)
+ GET_STRING_BINARY_DATA_ALLOCA (selection_value, data, bytes);
+ else if (chartypes == WORLD)
+ {
+ GET_STRING_CTEXT_DATA_ALLOCA (selection_value, data, bytes);
+ encoding = "COMPOUND_TEXT";
+ }
+ }
+#endif /* MULE */
+
+ fmh = XmStringCreateLtoR ("Clipboard", XmSTRING_DEFAULT_CHARSET);
+ while (ClipboardSuccess !=
+ XmClipboardStartCopy (display, selecting_window, fmh, thyme,
+#ifdef MOTIF_INCREMENTAL_CLIPBOARDS_WORK
+ widget, motif_clipboard_cb,
+#else
+ 0, NULL,
+#endif
+ &itemid))
+ ;
+ XmStringFree (fmh);
+ while (ClipboardSuccess !=
+ XmClipboardCopy (display, selecting_window, itemid, encoding,
+#ifdef MOTIF_INCREMENTAL_CLIPBOARDS_WORK
+ /* O'Reilly examples say size can be 0,
+ but this clearly is not the case. */
+ 0, bytes, (int) selecting_window, /* private id */
+#else /* !MOTIF_INCREMENTAL_CLIPBOARDS_WORK */
+ (XtPointer) data, bytes, 0,
+#endif /* !MOTIF_INCREMENTAL_CLIPBOARDS_WORK */
+ &dataid))
+ ;
+ while (ClipboardSuccess !=
+ XmClipboardEndCopy (display, selecting_window, itemid))
+ ;
+ }
+}
+
+# ifdef MOTIF_INCREMENTAL_CLIPBOARDS_WORK
+/* I tried to treat the clipboard like a real selection, and not send
+ the data until it was requested, but it looks like that just doesn't
+ work at all unless the selection owner and requestor are in different
+ processes. From reading the Motif source, it looks like they never
+ even considered having two widgets in the same application transfer
+ data between each other using "by-name" clipboard values. What a
+ bunch of fuckups.
+ */
+static void
+motif_clipboard_cb (Widget widget, int *data_id, int *private_id, int *reason)
+{
+ switch (*reason)
+ {
+ case XmCR_CLIPBOARD_DATA_REQUEST:
+ {
+ Display *dpy = XtDisplay (widget);
+ Window window = (Window) *private_id;
+ Lisp_Object selection = assq_no_quit (QCLIPBOARD, Vselection_alist);
+ if (NILP (selection)) abort ();
+ selection = XCDR (selection);
+ if (!STRINGP (selection)) abort ();
+ XmClipboardCopyByName (dpy, window, *data_id,
+ (char *) XSTRING_DATA (selection),
+ XSTRING_LENGTH (selection) + 1,
+ 0);
+ }
+ break;
+ case XmCR_CLIPBOARD_DATA_DELETE:
+ default:
+ /* don't need to free anything */
+ break;
+ }
+}
+# endif /* MOTIF_INCREMENTAL_CLIPBOARDS_WORK */
+#endif /* MOTIF_CLIPBOARDS */
+
+
+
+
+/* Send a SelectionNotify event to the requestor with property=None, meaning
+ we were unable to do what they wanted.
+ */
+static void
+x_decline_selection_request (XSelectionRequestEvent *event)
+{
+ XSelectionEvent reply;
+ reply.type = SelectionNotify;
+ reply.display = event->display;
+ reply.requestor = event->requestor;
+ reply.selection = event->selection;
+ reply.time = event->time;
+ reply.target = event->target;
+ reply.property = None;
+
+ XSendEvent (reply.display, reply.requestor, False, 0L, (XEvent *) &reply);
+ XFlush (reply.display);
+}
+
+
+/* Used as an unwind-protect clause so that, if a selection-converter signals
+ an error, we tell the requestor that we were unable to do what they wanted
+ before we throw to top-level or go into the debugger or whatever.
+ */
+static Lisp_Object
+x_selection_request_lisp_error (Lisp_Object closure)
+{
+ XSelectionRequestEvent *event = (XSelectionRequestEvent *)
+ get_opaque_ptr (closure);
+
+ free_opaque_ptr (closure);
+ if (event->type == 0) /* we set this to mean "completed normally" */
+ return Qnil;
+ x_decline_selection_request (event);
+ return Qnil;
+}
+
+
+/* Convert our selection to the requested type, and put that data where the
+ requestor wants it. Then tell them whether we've succeeded.
+ */
+static void
+x_reply_selection_request (XSelectionRequestEvent *event, int format,
+ unsigned char *data, int size, Atom type)
+{
+ /* This function can GC */
+ XSelectionEvent reply;
+ Display *display = event->display;
+ struct device *d = get_device_from_display (display);
+ Window window = event->requestor;
+ int bytes_remaining;
+ int format_bytes = format/8;
+ int max_bytes = SELECTION_QUANTUM (display);
+ if (max_bytes > MAX_SELECTION_QUANTUM) max_bytes = MAX_SELECTION_QUANTUM;
+
+ reply.type = SelectionNotify;
+ reply.display = display;
+ reply.requestor = window;
+ reply.selection = event->selection;
+ reply.time = event->time;
+ reply.target = event->target;
+ reply.property = (event->property == None ? event->target : event->property);
+
+ /* #### XChangeProperty can generate BadAlloc, and we must handle it! */
+
+ /* Store the data on the requested property.
+ If the selection is large, only store the first N bytes of it.
+ */
+ bytes_remaining = size * format_bytes;
+ if (bytes_remaining <= max_bytes)
+ {
+ /* Send all the data at once, with minimal handshaking. */
+#if 0
+ stderr_out ("\nStoring all %d\n", bytes_remaining);
+#endif
+ XChangeProperty (display, window, reply.property, type, format,
+ PropModeReplace, data, size);
+ /* At this point, the selection was successfully stored; ack it. */
+ XSendEvent (display, window, False, 0L, (XEvent *) &reply);
+ XFlush (display);
+ }
+ else
+ {
+ /* Send an INCR selection. */
+ int prop_id;
+
+ if (x_window_to_frame (d, window)) /* #### debug */
+ error ("attempt to transfer an INCR to ourself!");
+#if 0
+ stderr_out ("\nINCR %d\n", bytes_remaining);
+#endif
+ prop_id = expect_property_change (display, window, reply.property,
+ PropertyDelete);
+
+ XChangeProperty (display, window, reply.property, DEVICE_XATOM_INCR (d),
+ 32, PropModeReplace, (unsigned char *)
+ &bytes_remaining, 1);
+ XSelectInput (display, window, PropertyChangeMask);
+ /* Tell 'em the INCR data is there... */
+ XSendEvent (display, window, False, 0L, (XEvent *) &reply);
+ XFlush (display);
+
+ /* First, wait for the requestor to ack by deleting the property.
+ This can run random lisp code (process handlers) or signal.
+ */
+ wait_for_property_change (prop_id);
+
+ while (bytes_remaining)
+ {
+ int i = ((bytes_remaining < max_bytes)
+ ? bytes_remaining
+ : max_bytes);
+ prop_id = expect_property_change (display, window, reply.property,
+ PropertyDelete);
+#if 0
+ stderr_out (" INCR adding %d\n", i);
+#endif
+ /* Append the next chunk of data to the property. */
+ XChangeProperty (display, window, reply.property, type, format,
+ PropModeAppend, data, i / format_bytes);
+ bytes_remaining -= i;
+ data += i;
+
+ /* Now wait for the requestor to ack this chunk by deleting the
+ property. This can run random lisp code or signal.
+ */
+ wait_for_property_change (prop_id);
+ }
+ /* Now write a zero-length chunk to the property to tell the requestor
+ that we're done. */
+#if 0
+ stderr_out (" INCR done\n");
+#endif
+ if (! waiting_for_other_props_on_window (display, window))
+ XSelectInput (display, window, 0L);
+
+ XChangeProperty (display, window, reply.property, type, format,
+ PropModeReplace, data, 0);
+ }
+}
+
+
+
+/* Called from the event-loop in response to a SelectionRequest event.
+ */
+void
+x_handle_selection_request (XSelectionRequestEvent *event)
+{
+ /* This function can GC */
+ struct gcpro gcpro1, gcpro2, gcpro3;
+ Lisp_Object local_selection_data = Qnil;
+ Lisp_Object selection_symbol;
+ Lisp_Object target_symbol = Qnil;
+ Lisp_Object converted_selection = Qnil;
+ Time local_selection_time;
+ Lisp_Object successful_p = Qnil;
+ int count;
+ struct device *d = get_device_from_display (event->display);
+
+ GCPRO3 (local_selection_data, converted_selection, target_symbol);
+
+ selection_symbol = x_atom_to_symbol (d, event->selection);
+
+ local_selection_data = assq_no_quit (selection_symbol, Vselection_alist);
+
+#if 0
+ /* This list isn't user-visible, so it can't "go bad." */
+ assert (CONSP (local_selection_data));
+ assert (CONSP (XCDR (local_selection_data)));
+ assert (CONSP (XCDR (XCDR (local_selection_data))));
+ assert (NILP (XCDR (XCDR (XCDR (local_selection_data)))));
+ assert (CONSP (XCAR (XCDR (XCDR (local_selection_data)))));
+ assert (INTP (XCAR (XCAR (XCDR (XCDR (local_selection_data))))));
+ assert (INTP (XCDR (XCAR (XCDR (XCDR (local_selection_data))))));
+#endif
+
+ if (NILP (local_selection_data))
+ {
+ /* Someone asked for the selection, but we don't have it any more. */
+ x_decline_selection_request (event);
+ goto DONE_LABEL;
+ }
+
+ local_selection_time =
+ * (Time *) XOPAQUE_DATA (XCAR (XCDR (XCDR (local_selection_data))));
+
+ if (event->time != CurrentTime &&
+ local_selection_time > event->time)
+ {
+ /* Someone asked for the selection, and we have one, but not the one
+ they're looking for. */
+ x_decline_selection_request (event);
+ goto DONE_LABEL;
+ }
+
+ count = specpdl_depth ();
+ record_unwind_protect (x_selection_request_lisp_error,
+ make_opaque_ptr (event));
+ target_symbol = x_atom_to_symbol (d, event->target);
+
+#if 0 /* #### MULTIPLE doesn't work yet */
+ if (EQ (target_symbol, QMULTIPLE))
+ target_symbol = fetch_multiple_target (event);
+#endif
+
+ /* Convert lisp objects back into binary data */
+
+ converted_selection =
+ get_local_selection (selection_symbol, target_symbol);
+
+ if (! NILP (converted_selection))
+ {
+ unsigned char *data;
+ unsigned int size;
+ int format;
+ Atom type;
+ lisp_data_to_selection_data (d, converted_selection,
+ &data, &type, &size, &format);
+
+ x_reply_selection_request (event, format, data, size, type);
+ successful_p = Qt;
+ /* Tell x_selection_request_lisp_error() it's cool. */ event->type = 0;
+ xfree (data);
+ }
+ unbind_to (count, Qnil);
+
+ DONE_LABEL:
+
+ UNGCPRO;
+
+ /* Let random lisp code notice that the selection has been asked for. */
+ {
+ Lisp_Object rest;
+ Lisp_Object val = Vx_sent_selection_hooks;
+ if (!UNBOUNDP (val) && !NILP (val))
+ {
+ if (CONSP (val) && !EQ (XCAR (val), Qlambda))
+ for (rest = val; !NILP (rest); rest = Fcdr (rest))
+ call3 (Fcar(rest), selection_symbol, target_symbol,
+ successful_p);
+ else
+ call3 (val, selection_symbol, target_symbol,
+ successful_p);
+ }
+ }
+}
+
+
+/* Called from the event-loop in response to a SelectionClear event.
+ */
+void
+x_handle_selection_clear (XSelectionClearEvent *event)
+{
+ Display *display = event->display;
+ struct device *d = get_device_from_display (display);
+ Atom selection = event->selection;
+ Time changed_owner_time = event->time;
+
+ Lisp_Object selection_symbol, local_selection_data;
+ Time local_selection_time;
+
+ selection_symbol = x_atom_to_symbol (d, selection);
+
+ local_selection_data = assq_no_quit (selection_symbol, Vselection_alist);
+
+ /* Well, we already believe that we don't own it, so that's just fine. */
+ if (NILP (local_selection_data)) return;
+
+ local_selection_time =
+ * (Time *) XOPAQUE_DATA (XCAR (XCDR (XCDR (local_selection_data))));
+
+ /* This SelectionClear is for a selection that we no longer own, so we can
+ disregard it. (That is, we have reasserted the selection since this
+ request was generated.)
+ */
+ if (changed_owner_time != CurrentTime &&
+ local_selection_time > changed_owner_time)
+ return;
+
+ handle_selection_clear (selection_symbol);
+}
+
+\f
+/* This stuff is so that INCR selections are reentrant (that is, so we can
+ be servicing multiple INCR selection requests simultaneously). I haven't
+ actually tested that yet.
+ */
+
+static int prop_location_tick;
+
+static struct prop_location {
+ int tick;
+ Display *display;
+ Window window;
+ Atom property;
+ int desired_state;
+ struct prop_location *next;
+} *for_whom_the_bell_tolls;
+
+
+static int
+property_deleted_p (void *tick)
+{
+ struct prop_location *rest = for_whom_the_bell_tolls;
+ while (rest)
+ if (rest->tick == (long) tick)
+ return 0;
+ else
+ rest = rest->next;
+ return 1;
+}
+
+static int
+waiting_for_other_props_on_window (Display *display, Window window)
+{
+ struct prop_location *rest = for_whom_the_bell_tolls;
+ while (rest)
+ if (rest->display == display && rest->window == window)
+ return 1;
+ else
+ rest = rest->next;
+ return 0;
+}
+
+
+static int
+expect_property_change (Display *display, Window window,
+ Atom property, int state)
+{
+ struct prop_location *pl = xnew (struct prop_location);
+ pl->tick = ++prop_location_tick;
+ pl->display = display;
+ pl->window = window;
+ pl->property = property;
+ pl->desired_state = state;
+ pl->next = for_whom_the_bell_tolls;
+ for_whom_the_bell_tolls = pl;
+ return pl->tick;
+}
+
+static void
+unexpect_property_change (int tick)
+{
+ struct prop_location *prev = 0, *rest = for_whom_the_bell_tolls;
+ while (rest)
+ {
+ if (rest->tick == tick)
+ {
+ if (prev)
+ prev->next = rest->next;
+ else
+ for_whom_the_bell_tolls = rest->next;
+ xfree (rest);
+ return;
+ }
+ prev = rest;
+ rest = rest->next;
+ }
+}
+
+static void
+wait_for_property_change (long tick)
+{
+ /* This function can GC */
+ wait_delaying_user_input (property_deleted_p, (void *) tick);
+}
+
+
+/* Called from the event-loop in response to a PropertyNotify event.
+ */
+void
+x_handle_property_notify (XPropertyEvent *event)
+{
+ struct prop_location *prev = 0, *rest = for_whom_the_bell_tolls;
+ while (rest)
+ {
+ if (rest->property == event->atom &&
+ rest->window == event->window &&
+ rest->display == event->display &&
+ rest->desired_state == event->state)
+ {
+#if 0
+ stderr_out ("Saw expected prop-%s on %s\n",
+ (event->state == PropertyDelete ? "delete" : "change"),
+ (char *) string_data (XSYMBOL (x_atom_to_symbol (get_device_from_display (event->display), event->atom))->name);
+#endif
+ if (prev)
+ prev->next = rest->next;
+ else
+ for_whom_the_bell_tolls = rest->next;
+ xfree (rest);
+ return;
+ }
+ prev = rest;
+ rest = rest->next;
+ }
+#if 0
+ stderr_out ("Saw UNexpected prop-%s on %s\n",
+ (event->state == PropertyDelete ? "delete" : "change"),
+ (char *) string_data (XSYMBOL (x_atom_to_symbol (get_device_from_display (event->display), event->atom))->name));
+#endif
+}
+
+
+\f
+#if 0 /* #### MULTIPLE doesn't work yet */
+
+static Lisp_Object
+fetch_multiple_target (XSelectionRequestEvent *event)
+{
+ /* This function can GC */
+ Display *display = event->display;
+ Window window = event->requestor;
+ Atom target = event->target;
+ Atom selection_atom = event->selection;
+ int result;
+
+ return
+ Fcons (QMULTIPLE,
+ x_get_window_property_as_lisp_data (display, window, target,
+ QMULTIPLE,
+ selection_atom));
+}
+
+static Lisp_Object
+copy_multiple_data (Lisp_Object obj)
+{
+ Lisp_Object vec;
+ int i;
+ int len;
+ if (CONSP (obj))
+ return Fcons (XCAR (obj), copy_multiple_data (XCDR (obj)));
+
+ CHECK_VECTOR (obj);
+ len = XVECTOR_LENGTH (obj);
+ vec = make_vector (len, Qnil);
+ for (i = 0; i < len; i++)
+ {
+ Lisp_Object vec2 = XVECTOR_DATA (obj) [i];
+ CHECK_VECTOR (vec2);
+ if (XVECTOR_LENGTH (vec2) != 2)
+ signal_error (Qerror, list2 (build_string
+ ("vectors must be of length 2"),
+ vec2));
+ XVECTOR_DATA (vec) [i] = make_vector (2, Qnil);
+ XVECTOR_DATA (XVECTOR_DATA (vec) [i]) [0] = XVECTOR_DATA (vec2) [0];
+ XVECTOR_DATA (XVECTOR_DATA (vec) [i]) [1] = XVECTOR_DATA (vec2) [1];
+ }
+ return vec;
+}
+
+#endif /* 0 */
+
+\f
+static Window reading_selection_reply;
+static Atom reading_which_selection;
+static int selection_reply_timed_out;
+
+static int
+selection_reply_done (void *ignore)
+{
+ return !reading_selection_reply;
+}
+
+static Lisp_Object Qx_selection_reply_timeout_internal;
+
+DEFUN ("x-selection-reply-timeout-internal", Fx_selection_reply_timeout_internal,
+ 1, 1, 0, /*
+*/
+ (arg))
+{
+ selection_reply_timed_out = 1;
+ reading_selection_reply = 0;
+ return Qnil;
+}
+
+
+/* Do protocol to read selection-data from the server.
+ Converts this to lisp data and returns it.
+ */
+static Lisp_Object
+x_get_foreign_selection (Lisp_Object selection_symbol, Lisp_Object target_type)
+{
+ /* This function can GC */
+ struct device *d = decode_x_device (Qnil);
+ Display *display = DEVICE_X_DISPLAY (d);
+ struct frame *sel_frame = selected_frame ();
+ Window requestor_window = XtWindow (FRAME_X_TEXT_WIDGET (sel_frame));
+ Time requestor_time = DEVICE_X_MOUSE_TIMESTAMP (d);
+ Atom target_property = DEVICE_XATOM_EMACS_TMP (d);
+ Atom selection_atom = symbol_to_x_atom (d, selection_symbol, 0);
+ int speccount;
+ Atom type_atom = symbol_to_x_atom (d, (CONSP (target_type) ?
+ XCAR (target_type) : target_type), 0);
+
+ XConvertSelection (display, selection_atom, type_atom, target_property,
+ requestor_window, requestor_time);
+
+ /* Block until the reply has been read. */
+ reading_selection_reply = requestor_window;
+ reading_which_selection = selection_atom;
+ selection_reply_timed_out = 0;
+
+ speccount = specpdl_depth ();
+
+ /* add a timeout handler */
+ if (x_selection_timeout > 0)
+ {
+ Lisp_Object id = Fadd_timeout (make_int (x_selection_timeout),
+ Qx_selection_reply_timeout_internal,
+ Qnil, Qnil);
+ record_unwind_protect (Fdisable_timeout, id);
+ }
+
+ /* This is ^Gable */
+ wait_delaying_user_input (selection_reply_done, 0);
+
+ if (selection_reply_timed_out)
+ error ("timed out waiting for reply from selection owner");
+
+ unbind_to (speccount, Qnil);
+
+ /* otherwise, the selection is waiting for us on the requested property. */
+ return
+ x_get_window_property_as_lisp_data (display, requestor_window,
+ target_property, target_type,
+ selection_atom);
+}
+
+
+static void
+x_get_window_property (Display *display, Window window, Atom property,
+ unsigned char **data_ret, int *bytes_ret,
+ Atom *actual_type_ret, int *actual_format_ret,
+ unsigned long *actual_size_ret, int delete_p)
+{
+ int total_size;
+ unsigned long bytes_remaining;
+ int offset = 0;
+ unsigned char *tmp_data = 0;
+ int result;
+ int buffer_size = SELECTION_QUANTUM (display);
+ if (buffer_size > MAX_SELECTION_QUANTUM) buffer_size = MAX_SELECTION_QUANTUM;
+
+ /* First probe the thing to find out how big it is. */
+ result = XGetWindowProperty (display, window, property,
+ 0, 0, False, AnyPropertyType,
+ actual_type_ret, actual_format_ret,
+ actual_size_ret,
+ &bytes_remaining, &tmp_data);
+ if (result != Success)
+ {
+ *data_ret = 0;
+ *bytes_ret = 0;
+ return;
+ }
+ XFree ((char *) tmp_data);
+
+ if (*actual_type_ret == None || *actual_format_ret == 0)
+ {
+ if (delete_p) XDeleteProperty (display, window, property);
+ *data_ret = 0;
+ *bytes_ret = 0;
+ return;
+ }
+
+ total_size = bytes_remaining + 1;
+ *data_ret = (unsigned char *) xmalloc (total_size);
+
+ /* Now read, until we've gotten it all. */
+ while (bytes_remaining)
+ {
+#if 0
+ int last = bytes_remaining;
+#endif
+ result =
+ XGetWindowProperty (display, window, property,
+ offset/4, buffer_size/4,
+ (delete_p ? True : False),
+ AnyPropertyType,
+ actual_type_ret, actual_format_ret,
+ actual_size_ret, &bytes_remaining, &tmp_data);
+#if 0
+ stderr_out ("<< read %d\n", last-bytes_remaining);
+#endif
+ /* If this doesn't return Success at this point, it means that
+ some clod deleted the selection while we were in the midst of
+ reading it. Deal with that, I guess....
+ */
+ if (result != Success) break;
+ *actual_size_ret *= *actual_format_ret / 8;
+ memcpy ((*data_ret) + offset, tmp_data, *actual_size_ret);
+ offset += *actual_size_ret;
+ XFree ((char *) tmp_data);
+ }
+ *bytes_ret = offset;
+}
+
+
+static void
+receive_incremental_selection (Display *display, Window window, Atom property,
+ /* this one is for error messages only */
+ Lisp_Object target_type,
+ unsigned int min_size_bytes,
+ unsigned char **data_ret, int *size_bytes_ret,
+ Atom *type_ret, int *format_ret,
+ unsigned long *size_ret)
+{
+ /* This function can GC */
+ int offset = 0;
+ int prop_id;
+ *size_bytes_ret = min_size_bytes;
+ *data_ret = (unsigned char *) xmalloc (*size_bytes_ret);
+#if 0
+ stderr_out ("\nread INCR %d\n", min_size_bytes);
+#endif
+ /* At this point, we have read an INCR property, and deleted it (which
+ is how we ack its receipt: the sending window will be selecting
+ PropertyNotify events on our window to notice this).
+
+ Now, we must loop, waiting for the sending window to put a value on
+ that property, then reading the property, then deleting it to ack.
+ We are done when the sender places a property of length 0.
+ */
+ prop_id = expect_property_change (display, window, property,
+ PropertyNewValue);
+ while (1)
+ {
+ unsigned char *tmp_data;
+ int tmp_size_bytes;
+ wait_for_property_change (prop_id);
+ /* expect it again immediately, because x_get_window_property may
+ .. no it won't, I don't get it.
+ .. Ok, I get it now, the Xt code that implements INCR is broken.
+ */
+ prop_id = expect_property_change (display, window, property,
+ PropertyNewValue);
+ x_get_window_property (display, window, property,
+ &tmp_data, &tmp_size_bytes,
+ type_ret, format_ret, size_ret, 1);
+
+ if (tmp_size_bytes == 0) /* we're done */
+ {
+#if 0
+ stderr_out (" read INCR done\n");
+#endif
+ unexpect_property_change (prop_id);
+ if (tmp_data) xfree (tmp_data);
+ break;
+ }
+#if 0
+ stderr_out (" read INCR %d\n", tmp_size_bytes);
+#endif
+ if (*size_bytes_ret < offset + tmp_size_bytes)
+ {
+#if 0
+ stderr_out (" read INCR realloc %d -> %d\n",
+ *size_bytes_ret, offset + tmp_size_bytes);
+#endif
+ *size_bytes_ret = offset + tmp_size_bytes;
+ *data_ret = (unsigned char *) xrealloc (*data_ret, *size_bytes_ret);
+ }
+ memcpy ((*data_ret) + offset, tmp_data, tmp_size_bytes);
+ offset += tmp_size_bytes;
+ xfree (tmp_data);
+ }
+}
+
+
+static Lisp_Object
+x_get_window_property_as_lisp_data (Display *display,
+ Window window,
+ Atom property,
+ /* next two for error messages only */
+ Lisp_Object target_type,
+ Atom selection_atom)
+{
+ /* This function can GC */
+ Atom actual_type;
+ int actual_format;
+ unsigned long actual_size;
+ unsigned char *data = NULL;
+ int bytes = 0;
+ Lisp_Object val;
+ struct device *d = get_device_from_display (display);
+
+ x_get_window_property (display, window, property, &data, &bytes,
+ &actual_type, &actual_format, &actual_size, 1);
+ if (! data)
+ {
+ if (XGetSelectionOwner (display, selection_atom))
+ /* there is a selection owner */
+ signal_error
+ (Qselection_conversion_error,
+ Fcons (build_string ("selection owner couldn't convert"),
+ Fcons (x_atom_to_symbol (d, selection_atom),
+ actual_type ?
+ list2 (target_type, x_atom_to_symbol (d, actual_type)) :
+ list1 (target_type))));
+ else
+ signal_error (Qerror,
+ list2 (build_string ("no selection"),
+ x_atom_to_symbol (d, selection_atom)));
+ }
+
+ if (actual_type == DEVICE_XATOM_INCR (d))
+ {
+ /* Ok, that data wasn't *the* data, it was just the beginning. */
+
+ unsigned int min_size_bytes = * ((unsigned int *) data);
+ xfree (data);
+ receive_incremental_selection (display, window, property, target_type,
+ min_size_bytes, &data, &bytes,
+ &actual_type, &actual_format,
+ &actual_size);
+ }
+
+ /* It's been read. Now convert it to a lisp object in some semi-rational
+ manner. */
+ val = selection_data_to_lisp_data (d, data, bytes,
+ actual_type, actual_format);
+
+ xfree (data);
+ return val;
+}
+\f
+/* These functions convert from the selection data read from the server into
+ something that we can use from elisp, and vice versa.
+
+ Type: Format: Size: Elisp Type:
+ ----- ------- ----- -----------
+ * 8 * String
+ ATOM 32 1 Symbol
+ ATOM 32 > 1 Vector of Symbols
+ * 16 1 Integer
+ * 16 > 1 Vector of Integers
+ * 32 1 if <=16 bits: Integer
+ if > 16 bits: Cons of top16, bot16
+ * 32 > 1 Vector of the above
+
+ When converting a Lisp number to C, it is assumed to be of format 16 if
+ it is an integer, and of format 32 if it is a cons of two integers.
+
+ When converting a vector of numbers from Elisp to C, it is assumed to be
+ of format 16 if every element in the vector is an integer, and is assumed
+ to be of format 32 if any element is a cons of two integers.
+
+ When converting an object to C, it may be of the form (SYMBOL . <data>)
+ where SYMBOL is what we should claim that the type is. Format and
+ representation are as above.
+
+ NOTE: Under Mule, when someone shoves us a string without a type, we
+ set the type to 'COMPOUND_TEXT and automatically convert to Compound
+ Text. If the string has a type, we assume that the user wants the
+ data sent as-is so we just do "binary" conversion.
+ */
+
+
+static Lisp_Object
+selection_data_to_lisp_data (struct device *d,
+ unsigned char *data,
+ size_t size,
+ Atom type,
+ int format)
+{
+ if (type == DEVICE_XATOM_NULL (d))
+ return QNULL;
+
+ /* Convert any 8-bit data to a string, for compactness. */
+ else if (format == 8)
+ return make_ext_string (data, size,
+ type == DEVICE_XATOM_TEXT (d) ||
+ type == DEVICE_XATOM_COMPOUND_TEXT (d)
+ ? FORMAT_CTEXT : FORMAT_BINARY);
+
+ /* Convert a single atom to a Lisp Symbol.
+ Convert a set of atoms to a vector of symbols. */
+ else if (type == XA_ATOM)
+ {
+ if (size == sizeof (Atom))
+ return x_atom_to_symbol (d, *((Atom *) data));
+ else
+ {
+ int i;
+ int len = size / sizeof (Atom);
+ Lisp_Object v = Fmake_vector (make_int (len), Qzero);
+ for (i = 0; i < len; i++)
+ Faset (v, make_int (i), x_atom_to_symbol (d, ((Atom *) data) [i]));
+ return v;
+ }
+ }
+
+ /* Convert a single 16 or small 32 bit number to a Lisp Int.
+ If the number is > 16 bits, convert it to a cons of integers,
+ 16 bits in each half.
+ */
+ else if (format == 32 && size == sizeof (long))
+ return word_to_lisp (((unsigned long *) data) [0]);
+ else if (format == 16 && size == sizeof (short))
+ return make_int ((int) (((unsigned short *) data) [0]));
+
+ /* Convert any other kind of data to a vector of numbers, represented
+ as above (as an integer, or a cons of two 16 bit integers).
+
+ #### Perhaps we should return the actual type to lisp as well.
+
+ (x-get-selection-internal 'PRIMARY 'LINE_NUMBER)
+ ==> [4 4]
+
+ and perhaps it should be
+
+ (x-get-selection-internal 'PRIMARY 'LINE_NUMBER)
+ ==> (SPAN . [4 4])
+
+ Right now the fact that the return type was SPAN is discarded before
+ lisp code gets to see it.
+ */
+ else if (format == 16)
+ {
+ int i;
+ Lisp_Object v = make_vector (size / 4, Qzero);
+ for (i = 0; i < (int) size / 4; i++)
+ {
+ int j = (int) ((unsigned short *) data) [i];
+ Faset (v, make_int (i), make_int (j));
+ }
+ return v;
+ }
+ else
+ {
+ int i;
+ Lisp_Object v = make_vector (size / 4, Qzero);
+ for (i = 0; i < (int) size / 4; i++)
+ {
+ unsigned long j = ((unsigned long *) data) [i];
+ Faset (v, make_int (i), word_to_lisp (j));
+ }
+ return v;
+ }
+}
+
+
+static void
+lisp_data_to_selection_data (struct device *d,
+ Lisp_Object obj,
+ unsigned char **data_ret,
+ Atom *type_ret,
+ unsigned int *size_ret,
+ int *format_ret)
+{
+ Lisp_Object type = Qnil;
+
+ if (CONSP (obj) && SYMBOLP (XCAR (obj)))
+ {
+ type = XCAR (obj);
+ obj = XCDR (obj);
+ if (CONSP (obj) && NILP (XCDR (obj)))
+ obj = XCAR (obj);
+ }
+
+ if (EQ (obj, QNULL) || (EQ (type, QNULL)))
+ { /* This is not the same as declining */
+ *format_ret = 32;
+ *size_ret = 0;
+ *data_ret = 0;
+ type = QNULL;
+ }
+ else if (STRINGP (obj))
+ {
+ CONST Extbyte *extval;
+ Extcount extvallen;
+
+ if (NILP (type))
+ GET_STRING_CTEXT_DATA_ALLOCA (obj, extval, extvallen);
+ else
+ GET_STRING_BINARY_DATA_ALLOCA (obj, extval, extvallen);
+ *format_ret = 8;
+ *size_ret = extvallen;
+ *data_ret = (unsigned char *) xmalloc (*size_ret);
+ memcpy (*data_ret, extval, *size_ret);
+#ifdef MULE
+ if (NILP (type)) type = QCOMPOUND_TEXT;
+#else
+ if (NILP (type)) type = QSTRING;
+#endif
+ }
+ else if (CHARP (obj))
+ {
+ Bufbyte buf[MAX_EMCHAR_LEN];
+ Bytecount len;
+ CONST Extbyte *extval;
+ Extcount extvallen;
+
+ *format_ret = 8;
+ len = set_charptr_emchar (buf, XCHAR (obj));
+ GET_CHARPTR_EXT_CTEXT_DATA_ALLOCA (buf, len, extval, extvallen);
+ *size_ret = extvallen;
+ *data_ret = (unsigned char *) xmalloc (*size_ret);
+ memcpy (*data_ret, extval, *size_ret);
+#ifdef MULE
+ if (NILP (type)) type = QCOMPOUND_TEXT;
+#else
+ if (NILP (type)) type = QSTRING;
+#endif
+ }
+ else if (SYMBOLP (obj))
+ {
+ *format_ret = 32;
+ *size_ret = 1;
+ *data_ret = (unsigned char *) xmalloc (sizeof (Atom) + 1);
+ (*data_ret) [sizeof (Atom)] = 0;
+ (*(Atom **) data_ret) [0] = symbol_to_x_atom (d, obj, 0);
+ if (NILP (type)) type = QATOM;
+ }
+ else if (INTP (obj) &&
+ XINT (obj) <= 0x7FFF &&
+ XINT (obj) >= -0x8000)
+ {
+ *format_ret = 16;
+ *size_ret = 1;
+ *data_ret = (unsigned char *) xmalloc (sizeof (short) + 1);
+ (*data_ret) [sizeof (short)] = 0;
+ (*(short **) data_ret) [0] = (short) XINT (obj);
+ if (NILP (type)) type = QINTEGER;
+ }
+ else if (INTP (obj) || CONSP (obj))
+ {
+ *format_ret = 32;
+ *size_ret = 1;
+ *data_ret = (unsigned char *) xmalloc (sizeof (long) + 1);
+ (*data_ret) [sizeof (long)] = 0;
+ (*(unsigned long **) data_ret) [0] = lisp_to_word (obj);
+ if (NILP (type)) type = QINTEGER;
+ }
+ else if (VECTORP (obj))
+ {
+ /* Lisp Vectors may represent a set of ATOMs;
+ a set of 16 or 32 bit INTEGERs;
+ or a set of ATOM_PAIRs (represented as [[A1 A2] [A3 A4] ...]
+ */
+ int i;
+
+ if (SYMBOLP (XVECTOR_DATA (obj) [0]))
+ /* This vector is an ATOM set */
+ {
+ if (NILP (type)) type = QATOM;
+ *size_ret = XVECTOR_LENGTH (obj);
+ *format_ret = 32;
+ *data_ret = (unsigned char *) xmalloc ((*size_ret) * sizeof (Atom));
+ for (i = 0; i < (int) (*size_ret); i++)
+ if (SYMBOLP (XVECTOR_DATA (obj) [i]))
+ (*(Atom **) data_ret) [i] =
+ symbol_to_x_atom (d, XVECTOR_DATA (obj) [i], 0);
+ else
+ signal_error (Qerror, /* Qselection_error */
+ list2 (build_string
+ ("all elements of the vector must be of the same type"),
+ obj));
+ }
+#if 0 /* #### MULTIPLE doesn't work yet */
+ else if (VECTORP (XVECTOR_DATA (obj) [0]))
+ /* This vector is an ATOM_PAIR set */
+ {
+ if (NILP (type)) type = QATOM_PAIR;
+ *size_ret = XVECTOR_LENGTH (obj);
+ *format_ret = 32;
+ *data_ret = (unsigned char *)
+ xmalloc ((*size_ret) * sizeof (Atom) * 2);
+ for (i = 0; i < *size_ret; i++)
+ if (VECTORP (XVECTOR_DATA (obj) [i]))
+ {
+ Lisp_Object pair = XVECTOR_DATA (obj) [i];
+ if (XVECTOR_LENGTH (pair) != 2)
+ signal_error (Qerror,
+ list2 (build_string
+ ("elements of the vector must be vectors of exactly two elements"),
+ pair));
+
+ (*(Atom **) data_ret) [i * 2] =
+ symbol_to_x_atom (d, XVECTOR_DATA (pair) [0], 0);
+ (*(Atom **) data_ret) [(i * 2) + 1] =
+ symbol_to_x_atom (d, XVECTOR_DATA (pair) [1], 0);
+ }
+ else
+ signal_error (Qerror,
+ list2 (build_string
+ ("all elements of the vector must be of the same type"),
+ obj));
+ }
+#endif
+ else
+ /* This vector is an INTEGER set, or something like it */
+ {
+ *size_ret = XVECTOR_LENGTH (obj);
+ if (NILP (type)) type = QINTEGER;
+ *format_ret = 16;
+ for (i = 0; i < (int) (*size_ret); i++)
+ if (CONSP (XVECTOR_DATA (obj) [i]))
+ *format_ret = 32;
+ else if (!INTP (XVECTOR_DATA (obj) [i]))
+ signal_error (Qerror, /* Qselection_error */
+ list2 (build_string
+ ("all elements of the vector must be integers or conses of integers"),
+ obj));
+
+ *data_ret = (unsigned char *) xmalloc (*size_ret * (*format_ret/8));
+ for (i = 0; i < (int) (*size_ret); i++)
+ if (*format_ret == 32)
+ (*((unsigned long **) data_ret)) [i] =
+ lisp_to_word (XVECTOR_DATA (obj) [i]);
+ else
+ (*((unsigned short **) data_ret)) [i] =
+ (unsigned short) lisp_to_word (XVECTOR_DATA (obj) [i]);
+ }
+ }
+ else
+ signal_error (Qerror, /* Qselection_error */
+ list2 (build_string ("unrecognized selection data"),
+ obj));
+
+ *type_ret = symbol_to_x_atom (d, type, 0);
+}
+
+
+\f
+/* Called from the event loop to handle SelectionNotify events.
+ I don't think this needs to be reentrant.
+ */
+void
+x_handle_selection_notify (XSelectionEvent *event)
+{
+ if (! reading_selection_reply)
+ message ("received an unexpected SelectionNotify event");
+ else if (event->requestor != reading_selection_reply)
+ message ("received a SelectionNotify event for the wrong window");
+ else if (event->selection != reading_which_selection)
+ message ("received the wrong selection type in SelectionNotify!");
+ else
+ reading_selection_reply = 0; /* we're done now. */
+}
+
+static void
+x_disown_selection (Lisp_Object selection, Lisp_Object timeval)
+{
+ struct device *d = decode_x_device (Qnil);
+ Display *display = DEVICE_X_DISPLAY (d);
+ Time timestamp;
+ Atom selection_atom;
+
+ CHECK_SYMBOL (selection);
+ if (NILP (timeval))
+ timestamp = DEVICE_X_MOUSE_TIMESTAMP (d);
+ else
+ {
+ /* #### This is bogus. See the comment above about problems
+ on OSF/1 and DEC Alphas. Yet another reason why it sucks
+ to have the implementation (i.e. cons of two 16-bit
+ integers) exposed. */
+ time_t the_time;
+ lisp_to_time (timeval, &the_time);
+ timestamp = (Time) the_time;
+ }
+
+ selection_atom = symbol_to_x_atom (d, selection, 0);
+
+ XSetSelectionOwner (display, selection_atom, None, timestamp);
+}
+
+static Lisp_Object
+x_selection_exists_p (Lisp_Object selection)
+{
+ struct device *d = decode_x_device (Qnil);
+ Display *dpy = DEVICE_X_DISPLAY (d);
+ return XGetSelectionOwner (dpy, symbol_to_x_atom (d, selection, 0)) != None ?
+ Qt : Qnil;
+}
+
+\f
+#ifdef CUT_BUFFER_SUPPORT
+
+static int cut_buffers_initialized; /* Whether we're sure they all exist */
+
+/* Ensure that all 8 cut buffers exist. ICCCM says we gotta... */
+static void
+initialize_cut_buffers (Display *display, Window window)
+{
+ static unsigned CONST char * CONST data = (unsigned CONST char *) "";
+#define FROB(atom) XChangeProperty (display, window, atom, XA_STRING, 8, \
+ PropModeAppend, data, 0)
+ FROB (XA_CUT_BUFFER0);
+ FROB (XA_CUT_BUFFER1);
+ FROB (XA_CUT_BUFFER2);
+ FROB (XA_CUT_BUFFER3);
+ FROB (XA_CUT_BUFFER4);
+ FROB (XA_CUT_BUFFER5);
+ FROB (XA_CUT_BUFFER6);
+ FROB (XA_CUT_BUFFER7);
+#undef FROB
+ cut_buffers_initialized = 1;
+}
+
+#define CHECK_CUTBUFFER(symbol) \
+ { CHECK_SYMBOL (symbol); \
+ if (!EQ((symbol),QCUT_BUFFER0) && !EQ((symbol),QCUT_BUFFER1) && \
+ !EQ((symbol),QCUT_BUFFER2) && !EQ((symbol),QCUT_BUFFER3) && \
+ !EQ((symbol),QCUT_BUFFER4) && !EQ((symbol),QCUT_BUFFER5) && \
+ !EQ((symbol),QCUT_BUFFER6) && !EQ((symbol),QCUT_BUFFER7)) \
+ signal_error (Qerror, list2 (build_string ("Doesn't name a cutbuffer"), \
+ (symbol))); \
+ }
+
+DEFUN ("x-get-cutbuffer-internal", Fx_get_cutbuffer_internal, 1, 1, 0, /*
+Return the value of the named CUTBUFFER (typically CUT_BUFFER0).
+*/
+ (cutbuffer))
+{
+ struct device *d = decode_x_device (Qnil);
+ Display *display = DEVICE_X_DISPLAY (d);
+ Window window = RootWindow (display, 0); /* Cutbuffers are on frame 0 */
+ Atom cut_buffer_atom;
+ unsigned char *data;
+ int bytes;
+ Atom type;
+ int format;
+ unsigned long size;
+ Lisp_Object ret;
+
+ CHECK_CUTBUFFER (cutbuffer);
+ cut_buffer_atom = symbol_to_x_atom (d, cutbuffer, 0);
+
+ x_get_window_property (display, window, cut_buffer_atom, &data, &bytes,
+ &type, &format, &size, 0);
+ if (!data) return Qnil;
+
+ if (format != 8 || type != XA_STRING)
+ signal_simple_error_2 ("Cut buffer doesn't contain 8-bit STRING data",
+ x_atom_to_symbol (d, type),
+ make_int (format));
+
+ /* We cheat - if the string contains an ESC character, that's
+ technically not allowed in a STRING, so we assume it's
+ COMPOUND_TEXT that we stored there ourselves earlier,
+ in x-store-cutbuffer-internal */
+ ret = (bytes ?
+ make_ext_string (data, bytes,
+ memchr (data, 0x1b, bytes) ?
+ FORMAT_CTEXT : FORMAT_BINARY)
+ : Qnil);
+ xfree (data);
+ return ret;
+}
+
+
+DEFUN ("x-store-cutbuffer-internal", Fx_store_cutbuffer_internal, 2, 2, 0, /*
+Set the value of the named CUTBUFFER (typically CUT_BUFFER0) to STRING.
+*/
+ (cutbuffer, string))
+{
+ struct device *d = decode_x_device (Qnil);
+ Display *display = DEVICE_X_DISPLAY (d);
+ Window window = RootWindow (display, 0); /* Cutbuffers are on frame 0 */
+ Atom cut_buffer_atom;
+ CONST Extbyte *data = XSTRING_DATA (string);
+ Extcount bytes = XSTRING_LENGTH (string);
+ Extcount bytes_remaining;
+ int max_bytes = SELECTION_QUANTUM (display);
+#ifdef MULE
+ CONST Bufbyte *ptr, *end;
+ enum { ASCII, LATIN_1, WORLD } chartypes = ASCII;
+#endif
+
+ if (max_bytes > MAX_SELECTION_QUANTUM)
+ max_bytes = MAX_SELECTION_QUANTUM;
+
+ CHECK_CUTBUFFER (cutbuffer);
+ CHECK_STRING (string);
+ cut_buffer_atom = symbol_to_x_atom (d, cutbuffer, 0);
+
+ if (! cut_buffers_initialized)
+ initialize_cut_buffers (display, window);
+
+ /* We use the STRING encoding (Latin-1 only) if we can, else COMPOUND_TEXT.
+ We cheat and use type = `STRING' even when using COMPOUND_TEXT.
+ The ICCCM requires that this be so, and other clients assume it,
+ as we do ourselves in initialize_cut_buffers. */
+
+#ifdef MULE
+ /* Optimize for the common ASCII case */
+ for (ptr = data, end = ptr + bytes; ptr <= end; )
+ {
+ if (BYTE_ASCII_P (*ptr))
+ {
+ ptr++;
+ continue;
+ }
+
+ if ((*ptr) == LEADING_BYTE_LATIN_ISO8859_1 ||
+ (*ptr) == LEADING_BYTE_CONTROL_1)
+ {
+ chartypes = LATIN_1;
+ ptr += 2;
+ continue;
+ }
+
+ chartypes = WORLD;
+ break;
+ }
+
+ if (chartypes == LATIN_1)
+ GET_STRING_BINARY_DATA_ALLOCA (string, data, bytes);
+ else if (chartypes == WORLD)
+ GET_STRING_CTEXT_DATA_ALLOCA (string, data, bytes);
+#endif /* MULE */
+
+ bytes_remaining = bytes;
+
+ while (bytes_remaining)
+ {
+ int chunk = bytes_remaining < max_bytes ? bytes_remaining : max_bytes;
+ XChangeProperty (display, window, cut_buffer_atom, XA_STRING, 8,
+ (bytes_remaining == bytes
+ ? PropModeReplace : PropModeAppend),
+ data, chunk);
+ data += chunk;
+ bytes_remaining -= chunk;
+ }
+ return string;
+}
+
+
+DEFUN ("x-rotate-cutbuffers-internal", Fx_rotate_cutbuffers_internal, 1, 1, 0, /*
+Rotate the values of the cutbuffers by the given number of steps;
+positive means move values forward, negative means backward.
+*/
+ (n))
+{
+ struct device *d = decode_x_device (Qnil);
+ Display *display = DEVICE_X_DISPLAY (d);
+ Window window = RootWindow (display, 0); /* Cutbuffers are on frame 0 */
+ Atom props [8];
+
+ CHECK_INT (n);
+ if (XINT (n) == 0)
+ return n;
+ if (! cut_buffers_initialized)
+ initialize_cut_buffers (display, window);
+ props[0] = XA_CUT_BUFFER0;
+ props[1] = XA_CUT_BUFFER1;
+ props[2] = XA_CUT_BUFFER2;
+ props[3] = XA_CUT_BUFFER3;
+ props[4] = XA_CUT_BUFFER4;
+ props[5] = XA_CUT_BUFFER5;
+ props[6] = XA_CUT_BUFFER6;
+ props[7] = XA_CUT_BUFFER7;
+ XRotateWindowProperties (display, window, props, 8, XINT (n));
+ return n;
+}
+
+#endif /* CUT_BUFFER_SUPPORT */
+
+
+\f
+/************************************************************************/
+/* initialization */
+/************************************************************************/
+
+void
+syms_of_xselect (void)
+{
+
+#ifdef CUT_BUFFER_SUPPORT
+ DEFSUBR (Fx_get_cutbuffer_internal);
+ DEFSUBR (Fx_store_cutbuffer_internal);
+ DEFSUBR (Fx_rotate_cutbuffers_internal);
+#endif /* CUT_BUFFER_SUPPORT */
+
+ /* Unfortunately, timeout handlers must be lisp functions. */
+ defsymbol (&Qx_selection_reply_timeout_internal,
+ "x-selection-reply-timeout-internal");
+ DEFSUBR (Fx_selection_reply_timeout_internal);
+
+#ifdef CUT_BUFFER_SUPPORT
+ defsymbol (&QCUT_BUFFER0, "CUT_BUFFER0");
+ defsymbol (&QCUT_BUFFER1, "CUT_BUFFER1");
+ defsymbol (&QCUT_BUFFER2, "CUT_BUFFER2");
+ defsymbol (&QCUT_BUFFER3, "CUT_BUFFER3");
+ defsymbol (&QCUT_BUFFER4, "CUT_BUFFER4");
+ defsymbol (&QCUT_BUFFER5, "CUT_BUFFER5");
+ defsymbol (&QCUT_BUFFER6, "CUT_BUFFER6");
+ defsymbol (&QCUT_BUFFER7, "CUT_BUFFER7");
+#endif /* CUT_BUFFER_SUPPORT */
+}
+
+void
+console_type_create_select_x (void)
+{
+ CONSOLE_HAS_METHOD (x, own_selection);
+ CONSOLE_HAS_METHOD (x, disown_selection);
+ CONSOLE_HAS_METHOD (x, get_foreign_selection);
+ CONSOLE_HAS_METHOD (x, selection_exists_p);
+}
+
+void
+vars_of_xselect (void)
+{
+#ifdef CUT_BUFFER_SUPPORT
+ cut_buffers_initialized = 0;
+ Fprovide (intern ("cut-buffer"));
+#endif
+
+ reading_selection_reply = 0;
+ reading_which_selection = 0;
+ selection_reply_timed_out = 0;
+ for_whom_the_bell_tolls = 0;
+ prop_location_tick = 0;
+
+ DEFVAR_LISP ("x-sent-selection-hooks", &Vx_sent_selection_hooks /*
+A function or functions to be called after we have responded to some
+other client's request for the value of a selection that we own. The
+function(s) will be called with four arguments:
+ - the name of the selection (typically PRIMARY, SECONDARY, or CLIPBOARD);
+ - the name of the selection-type which we were requested to convert the
+ selection into before sending (for example, STRING or LENGTH);
+ - and whether we successfully transmitted the selection.
+We might have failed (and declined the request) for any number of reasons,
+including being asked for a selection that we no longer own, or being asked
+to convert into a type that we don't know about or that is inappropriate.
+This hook doesn't let you change the behavior of emacs's selection replies,
+it merely informs you that they have happened.
+*/ );
+ Vx_sent_selection_hooks = Qunbound;
+
+ DEFVAR_INT ("x-selection-timeout", &x_selection_timeout /*
+If the selection owner doesn't reply in this many seconds, we give up.
+A value of 0 means wait as long as necessary. This is initialized from the
+\"*selectionTimeout\" resource (which is expressed in milliseconds).
+*/ );
+ x_selection_timeout = 0;
+}
+
+void
+Xatoms_of_xselect (struct device *d)
+{
+ Display *D = DEVICE_X_DISPLAY (d);
+
+ /* Non-predefined atoms that we might end up using a lot */
+ DEVICE_XATOM_CLIPBOARD (d) = XInternAtom (D, "CLIPBOARD", False);
+ DEVICE_XATOM_TIMESTAMP (d) = XInternAtom (D, "TIMESTAMP", False);
+ DEVICE_XATOM_TEXT (d) = XInternAtom (D, "TEXT", False);
+ DEVICE_XATOM_DELETE (d) = XInternAtom (D, "DELETE", False);
+ DEVICE_XATOM_MULTIPLE (d) = XInternAtom (D, "MULTIPLE", False);
+ DEVICE_XATOM_INCR (d) = XInternAtom (D, "INCR", False);
+ DEVICE_XATOM_TARGETS (d) = XInternAtom (D, "TARGETS", False);
+ DEVICE_XATOM_NULL (d) = XInternAtom (D, "NULL", False);
+ DEVICE_XATOM_ATOM_PAIR (d) = XInternAtom (D, "ATOM_PAIR", False);
+ DEVICE_XATOM_COMPOUND_TEXT (d) = XInternAtom (D, "COMPOUND_TEXT", False);
+ DEVICE_XATOM_EMACS_TMP (d) = XInternAtom (D, "_EMACS_TMP_", False);
+}
projects / chise / xemacs-chise.git.1 / blobdiff