--- /dev/null
+/* Generic GUI code. (menubars, scrollbars, toolbars, dialogs)
+ Copyright (C) 1995 Board of Trustees, University of Illinois.
+ Copyright (C) 1995, 1996 Ben Wing.
+ Copyright (C) 1995 Sun Microsystems, Inc.
+ Copyright (C) 1998 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 in FSF. */
+
+/* This file not quite Mule-ized yet but will be when merged with my
+ Mule workspace. --ben */
+
+#include <config.h>
+#include "lisp.h"
+#include "gui.h"
+#include "elhash.h"
+#include "buffer.h"
+#include "bytecode.h"
+
+Lisp_Object Qmenu_no_selection_hook;
+Lisp_Object Vmenu_no_selection_hook;
+
+static Lisp_Object parse_gui_item_tree_list (Lisp_Object list);
+Lisp_Object find_keyword_in_vector (Lisp_Object vector, Lisp_Object keyword);
+
+#ifdef HAVE_POPUPS
+
+/* count of menus/dboxes currently up */
+int popup_up_p;
+
+DEFUN ("popup-up-p", Fpopup_up_p, 0, 0, 0, /*
+Return t if a popup menu or dialog box is up, nil otherwise.
+See `popup-menu' and `popup-dialog-box'.
+*/
+ ())
+{
+ return popup_up_p ? Qt : Qnil;
+}
+#endif /* HAVE_POPUPS */
+
+int
+separator_string_p (const Bufbyte *s)
+{
+ const Bufbyte *p;
+ Bufbyte first;
+
+ if (!s || s[0] == '\0')
+ return 0;
+ first = s[0];
+ if (first != '-' && first != '=')
+ return 0;
+ for (p = s; *p == first; p++)
+ ;
+
+ return (*p == '!' || *p == ':' || *p == '\0');
+}
+
+/* Massage DATA to find the correct function and argument. Used by
+ popup_selection_callback() and the msw code. */
+void
+get_gui_callback (Lisp_Object data, Lisp_Object *fn, Lisp_Object *arg)
+{
+ if (EQ (data, Qquit))
+ {
+ *fn = Qeval;
+ *arg = list3 (Qsignal, list2 (Qquote, Qquit), Qnil);
+ Vquit_flag = Qt;
+ }
+ else if (SYMBOLP (data)
+ || (COMPILED_FUNCTIONP (data)
+ && XCOMPILED_FUNCTION (data)->flags.interactivep)
+ || (CONSP (data) && (EQ (XCAR (data), Qlambda))
+ && !NILP (Fassq (Qinteractive, Fcdr (Fcdr (data))))))
+ {
+ *fn = Qcall_interactively;
+ *arg = data;
+ }
+ else if (CONSP (data))
+ {
+ *fn = Qeval;
+ *arg = data;
+ }
+ else
+ {
+ *fn = Qeval;
+ *arg = list3 (Qsignal,
+ list2 (Qquote, Qerror),
+ list2 (Qquote, list2 (build_translated_string
+ ("illegal callback"),
+ data)));
+ }
+}
+
+/*
+ * Add a value VAL associated with keyword KEY into PGUI_ITEM
+ * structure. If KEY is not a keyword, or is an unknown keyword, then
+ * error is signaled.
+ */
+int
+gui_item_add_keyval_pair (Lisp_Object gui_item,
+ Lisp_Object key, Lisp_Object val,
+ Error_behavior errb)
+{
+ Lisp_Gui_Item *pgui_item = XGUI_ITEM (gui_item);
+ int retval = 0;
+
+ if (!KEYWORDP (key))
+ syntax_error_2 ("Non-keyword in gui item", key, pgui_item->name);
+
+ if (EQ (key, Q_descriptor))
+ {
+ if (!EQ (pgui_item->name, val))
+ {
+ retval = 1;
+ pgui_item->name = val;
+ }
+ }
+#define FROB(slot) \
+ else if (EQ (key, Q_##slot)) \
+ { \
+ if (!EQ (pgui_item->slot, val)) \
+ { \
+ retval = 1; \
+ pgui_item->slot = val; \
+ } \
+ }
+ FROB (suffix)
+ FROB (active)
+ FROB (included)
+ FROB (config)
+ FROB (filter)
+ FROB (style)
+ FROB (selected)
+ FROB (keys)
+ FROB (callback)
+ FROB (callback_ex)
+ FROB (value)
+#undef FROB
+ else if (EQ (key, Q_key_sequence)) ; /* ignored for FSF compatibility */
+ else if (EQ (key, Q_label)) ; /* ignored for 21.0 implement in 21.2 */
+ else if (EQ (key, Q_accelerator))
+ {
+ if (!EQ (pgui_item->accelerator, val))
+ {
+ retval = 1;
+ if (SYMBOLP (val) || CHARP (val))
+ pgui_item->accelerator = val;
+ else if (ERRB_EQ (errb, ERROR_ME))
+ syntax_error ("Bad keyboard accelerator", val);
+ }
+ }
+ else if (ERRB_EQ (errb, ERROR_ME))
+ syntax_error_2 ("Unknown keyword in gui item", key,
+ pgui_item->name);
+ return retval;
+}
+
+void
+gui_item_init (Lisp_Object gui_item)
+{
+ Lisp_Gui_Item *lp = XGUI_ITEM (gui_item);
+
+ lp->name = Qnil;
+ lp->callback = Qnil;
+ lp->callback_ex = Qnil;
+ lp->suffix = Qnil;
+ lp->active = Qt;
+ lp->included = Qt;
+ lp->config = Qnil;
+ lp->filter = Qnil;
+ lp->style = Qnil;
+ lp->selected = Qnil;
+ lp->keys = Qnil;
+ lp->accelerator = Qnil;
+ lp->value = Qnil;
+}
+
+Lisp_Object
+allocate_gui_item (void)
+{
+ Lisp_Gui_Item *lp = alloc_lcrecord_type (Lisp_Gui_Item, &lrecord_gui_item);
+ Lisp_Object val;
+
+ zero_lcrecord (lp);
+ XSETGUI_ITEM (val, lp);
+
+ gui_item_init (val);
+
+ return val;
+}
+
+/*
+ * ITEM is a lisp vector, describing a menu item or a button. The
+ * function extracts the description of the item into the PGUI_ITEM
+ * structure.
+ */
+static Lisp_Object
+make_gui_item_from_keywords_internal (Lisp_Object item,
+ Error_behavior errb)
+{
+ int length, plist_p, start;
+ Lisp_Object *contents;
+ Lisp_Object gui_item = allocate_gui_item ();
+ Lisp_Gui_Item *pgui_item = XGUI_ITEM (gui_item);
+
+ CHECK_VECTOR (item);
+ length = XVECTOR_LENGTH (item);
+ contents = XVECTOR_DATA (item);
+
+ if (length < 1)
+ syntax_error ("GUI item descriptors must be at least 1 elts long", item);
+
+ /* length 1: [ "name" ]
+ length 2: [ "name" callback ]
+ length 3: [ "name" callback active-p ]
+ or [ "name" keyword value ]
+ length 4: [ "name" callback active-p suffix ]
+ or [ "name" callback keyword value ]
+ length 5+: [ "name" callback [ keyword value ]+ ]
+ or [ "name" [ keyword value ]+ ]
+ */
+ plist_p = (length > 2 && (KEYWORDP (contents [1])
+ || KEYWORDP (contents [2])));
+
+ pgui_item->name = contents [0];
+ if (length > 1 && !KEYWORDP (contents [1]))
+ {
+ pgui_item->callback = contents [1];
+ start = 2;
+ }
+ else
+ start =1;
+
+ if (!plist_p && length > 2)
+ /* the old way */
+ {
+ pgui_item->active = contents [2];
+ if (length == 4)
+ pgui_item->suffix = contents [3];
+ }
+ else
+ /* the new way */
+ {
+ int i;
+ if ((length - start) & 1)
+ syntax_error (
+ "GUI item descriptor has an odd number of keywords and values",
+ item);
+
+ for (i = start; i < length;)
+ {
+ Lisp_Object key = contents [i++];
+ Lisp_Object val = contents [i++];
+ gui_item_add_keyval_pair (gui_item, key, val, errb);
+ }
+ }
+ return gui_item;
+}
+
+/* This will only work with descriptors in the new format. */
+Lisp_Object
+widget_gui_parse_item_keywords (Lisp_Object item)
+{
+ int i, length;
+ Lisp_Object *contents;
+ Lisp_Object gui_item = allocate_gui_item ();
+ Lisp_Object desc = find_keyword_in_vector (item, Q_descriptor);
+
+ CHECK_VECTOR (item);
+ length = XVECTOR_LENGTH (item);
+ contents = XVECTOR_DATA (item);
+
+ if (!NILP (desc) && !STRINGP (desc) && !VECTORP (desc))
+ syntax_error ("Invalid GUI item descriptor", item);
+
+ if (length & 1)
+ {
+ if (!SYMBOLP (contents [0]))
+ syntax_error ("Invalid GUI item descriptor", item);
+ contents++; /* Ignore the leading symbol. */
+ length--;
+ }
+
+ for (i = 0; i < length;)
+ {
+ Lisp_Object key = contents [i++];
+ Lisp_Object val = contents [i++];
+ gui_item_add_keyval_pair (gui_item, key, val, ERROR_ME_NOT);
+ }
+
+ return gui_item;
+}
+
+/* Update a gui item from a partial descriptor. */
+int
+update_gui_item_keywords (Lisp_Object gui_item, Lisp_Object item)
+{
+ int i, length, retval = 0;
+ Lisp_Object *contents;
+
+ CHECK_VECTOR (item);
+ length = XVECTOR_LENGTH (item);
+ contents = XVECTOR_DATA (item);
+
+ if (length & 1)
+ {
+ if (!SYMBOLP (contents [0]))
+ syntax_error ("Invalid GUI item descriptor", item);
+ contents++; /* Ignore the leading symbol. */
+ length--;
+ }
+
+ for (i = 0; i < length;)
+ {
+ Lisp_Object key = contents [i++];
+ Lisp_Object val = contents [i++];
+ if (gui_item_add_keyval_pair (gui_item, key, val, ERROR_ME_NOT))
+ retval = 1;
+ }
+ return retval;
+}
+
+Lisp_Object
+gui_parse_item_keywords (Lisp_Object item)
+{
+ return make_gui_item_from_keywords_internal (item, ERROR_ME);
+}
+
+Lisp_Object
+gui_parse_item_keywords_no_errors (Lisp_Object item)
+{
+ return make_gui_item_from_keywords_internal (item, ERROR_ME_NOT);
+}
+
+/* convert a gui item into plist properties */
+void
+gui_add_item_keywords_to_plist (Lisp_Object plist, Lisp_Object gui_item)
+{
+ Lisp_Gui_Item *pgui_item = XGUI_ITEM (gui_item);
+
+ if (!NILP (pgui_item->callback))
+ Fplist_put (plist, Q_callback, pgui_item->callback);
+ if (!NILP (pgui_item->callback_ex))
+ Fplist_put (plist, Q_callback_ex, pgui_item->callback_ex);
+ if (!NILP (pgui_item->suffix))
+ Fplist_put (plist, Q_suffix, pgui_item->suffix);
+ if (!NILP (pgui_item->active))
+ Fplist_put (plist, Q_active, pgui_item->active);
+ if (!NILP (pgui_item->included))
+ Fplist_put (plist, Q_included, pgui_item->included);
+ if (!NILP (pgui_item->config))
+ Fplist_put (plist, Q_config, pgui_item->config);
+ if (!NILP (pgui_item->filter))
+ Fplist_put (plist, Q_filter, pgui_item->filter);
+ if (!NILP (pgui_item->style))
+ Fplist_put (plist, Q_style, pgui_item->style);
+ if (!NILP (pgui_item->selected))
+ Fplist_put (plist, Q_selected, pgui_item->selected);
+ if (!NILP (pgui_item->keys))
+ Fplist_put (plist, Q_keys, pgui_item->keys);
+ if (!NILP (pgui_item->accelerator))
+ Fplist_put (plist, Q_accelerator, pgui_item->accelerator);
+ if (!NILP (pgui_item->value))
+ Fplist_put (plist, Q_value, pgui_item->value);
+}
+
+/*
+ * Decide whether a GUI item is active by evaluating its :active form
+ * if any
+ */
+int
+gui_item_active_p (Lisp_Object gui_item)
+{
+ /* This function can call lisp */
+
+ /* Shortcut to avoid evaluating Qt each time */
+ return (EQ (XGUI_ITEM (gui_item)->active, Qt)
+ || !NILP (Feval (XGUI_ITEM (gui_item)->active)));
+}
+
+/* set menu accelerator key to first underlined character in menu name */
+Lisp_Object
+gui_item_accelerator (Lisp_Object gui_item)
+{
+ Lisp_Gui_Item *pgui = XGUI_ITEM (gui_item);
+
+ if (!NILP (pgui->accelerator))
+ return pgui->accelerator;
+
+ else
+ return gui_name_accelerator (pgui->name);
+}
+
+Lisp_Object
+gui_name_accelerator (Lisp_Object nm)
+{
+ Bufbyte *name = XSTRING_DATA (nm);
+
+ while (*name)
+ {
+ if (*name == '%')
+ {
+ ++name;
+ if (!(*name))
+ return Qnil;
+ if (*name == '_' && *(name + 1))
+ {
+ Emchar accelerator = charptr_emchar (name + 1);
+ /* #### bogus current_buffer dependency */
+ return make_char (DOWNCASE (current_buffer, accelerator));
+ }
+ }
+ INC_CHARPTR (name);
+ }
+ return make_char (DOWNCASE (current_buffer,
+ charptr_emchar (XSTRING_DATA (nm))));
+}
+
+/*
+ * Decide whether a GUI item is selected by evaluating its :selected form
+ * if any
+ */
+int
+gui_item_selected_p (Lisp_Object gui_item)
+{
+ /* This function can call lisp */
+
+ /* Shortcut to avoid evaluating Qt each time */
+ return (EQ (XGUI_ITEM (gui_item)->selected, Qt)
+ || !NILP (Feval (XGUI_ITEM (gui_item)->selected)));
+}
+
+Lisp_Object
+gui_item_list_find_selected (Lisp_Object gui_item_list)
+{
+ /* This function can GC. */
+ Lisp_Object rest;
+ LIST_LOOP (rest, gui_item_list)
+ {
+ if (gui_item_selected_p (XCAR (rest)))
+ return XCAR (rest);
+ }
+ return XCAR (gui_item_list);
+}
+
+/*
+ * Decide whether a GUI item is included by evaluating its :included
+ * form if given, and testing its :config form against supplied CONFLIST
+ * configuration variable
+ */
+int
+gui_item_included_p (Lisp_Object gui_item, Lisp_Object conflist)
+{
+ /* This function can call lisp */
+ Lisp_Gui_Item *pgui_item = XGUI_ITEM (gui_item);
+
+ /* Evaluate :included first. Shortcut to avoid evaluating Qt each time */
+ if (!EQ (pgui_item->included, Qt)
+ && NILP (Feval (pgui_item->included)))
+ return 0;
+
+ /* Do :config if conflist is given */
+ if (!NILP (conflist) && !NILP (pgui_item->config)
+ && NILP (Fmemq (pgui_item->config, conflist)))
+ return 0;
+
+ return 1;
+}
+
+static DOESNT_RETURN
+signal_too_long_error (Lisp_Object name)
+{
+ syntax_error ("GUI item produces too long displayable string", name);
+}
+
+#ifdef HAVE_WINDOW_SYSTEM
+/*
+ * Format "left flush" display portion of an item into BUF, guarded by
+ * maximum buffer size BUF_LEN. BUF_LEN does not count for terminating
+ * null character, so actual maximum size of buffer consumed is
+ * BUF_LEN + 1 bytes. If buffer is not big enough, then error is
+ * signaled.
+ * Return value is the offset to the terminating null character into the
+ * buffer.
+ */
+unsigned int
+gui_item_display_flush_left (Lisp_Object gui_item,
+ char *buf, Bytecount buf_len)
+{
+ /* This function can call lisp */
+ char *p = buf;
+ Bytecount len;
+ Lisp_Gui_Item *pgui_item = XGUI_ITEM (gui_item);
+
+ /* Copy item name first */
+ CHECK_STRING (pgui_item->name);
+ len = XSTRING_LENGTH (pgui_item->name);
+ if (len > buf_len)
+ signal_too_long_error (pgui_item->name);
+ memcpy (p, XSTRING_DATA (pgui_item->name), len);
+ p += len;
+
+ /* Add space and suffix, if there is a suffix.
+ * If suffix is not string evaluate it */
+ if (!NILP (pgui_item->suffix))
+ {
+ Lisp_Object suffix = pgui_item->suffix;
+ /* Shortcut to avoid evaluating suffix each time */
+ if (!STRINGP (suffix))
+ {
+ suffix = Feval (suffix);
+ CHECK_STRING (suffix);
+ }
+
+ len = XSTRING_LENGTH (suffix);
+ if (p + len + 1 > buf + buf_len)
+ signal_too_long_error (pgui_item->name);
+ *(p++) = ' ';
+ memcpy (p, XSTRING_DATA (suffix), len);
+ p += len;
+ }
+ *p = '\0';
+ return p - buf;
+}
+
+/*
+ * Format "right flush" display portion of an item into BUF, guarded by
+ * maximum buffer size BUF_LEN. BUF_LEN does not count for terminating
+ * null character, so actual maximum size of buffer consumed is
+ * BUF_LEN + 1 bytes. If buffer is not big enough, then error is
+ * signaled.
+ * Return value is the offset to the terminating null character into the
+ * buffer.
+ */
+unsigned int
+gui_item_display_flush_right (Lisp_Object gui_item,
+ char *buf, Bytecount buf_len)
+{
+ Lisp_Gui_Item *pgui_item = XGUI_ITEM (gui_item);
+ *buf = 0;
+
+#ifdef HAVE_MENUBARS
+ /* Have keys? */
+ if (!menubar_show_keybindings)
+ return 0;
+#endif
+
+ /* Try :keys first */
+ if (!NILP (pgui_item->keys))
+ {
+ CHECK_STRING (pgui_item->keys);
+ if (XSTRING_LENGTH (pgui_item->keys) + 1 > buf_len)
+ signal_too_long_error (pgui_item->name);
+ memcpy (buf, XSTRING_DATA (pgui_item->keys),
+ XSTRING_LENGTH (pgui_item->keys) + 1);
+ return XSTRING_LENGTH (pgui_item->keys);
+ }
+
+ /* See if we can derive keys out of callback symbol */
+ if (SYMBOLP (pgui_item->callback))
+ {
+ char buf2[1024]; /* #### */
+ Bytecount len;
+
+ where_is_to_char (pgui_item->callback, buf2);
+ len = strlen (buf2);
+ if (len > buf_len)
+ signal_too_long_error (pgui_item->name);
+ strcpy (buf, buf2);
+ return len;
+ }
+
+ /* No keys - no right flush display */
+ return 0;
+}
+#endif /* HAVE_WINDOW_SYSTEM */
+
+static Lisp_Object
+mark_gui_item (Lisp_Object obj)
+{
+ Lisp_Gui_Item *p = XGUI_ITEM (obj);
+
+ mark_object (p->name);
+ mark_object (p->callback);
+ mark_object (p->callback_ex);
+ mark_object (p->config);
+ mark_object (p->suffix);
+ mark_object (p->active);
+ mark_object (p->included);
+ mark_object (p->config);
+ mark_object (p->filter);
+ mark_object (p->style);
+ mark_object (p->selected);
+ mark_object (p->keys);
+ mark_object (p->accelerator);
+ mark_object (p->value);
+
+ return Qnil;
+}
+
+static unsigned long
+gui_item_hash (Lisp_Object obj, int depth)
+{
+ Lisp_Gui_Item *p = XGUI_ITEM (obj);
+
+ return HASH2 (HASH6 (internal_hash (p->name, depth + 1),
+ internal_hash (p->callback, depth + 1),
+ internal_hash (p->callback_ex, depth + 1),
+ internal_hash (p->suffix, depth + 1),
+ internal_hash (p->active, depth + 1),
+ internal_hash (p->included, depth + 1)),
+ HASH6 (internal_hash (p->config, depth + 1),
+ internal_hash (p->filter, depth + 1),
+ internal_hash (p->style, depth + 1),
+ internal_hash (p->selected, depth + 1),
+ internal_hash (p->keys, depth + 1),
+ internal_hash (p->value, depth + 1)));
+}
+
+int
+gui_item_id_hash (Lisp_Object hashtable, Lisp_Object gitem, int slot)
+{
+ int hashid = gui_item_hash (gitem, 0);
+ int id = GUI_ITEM_ID_BITS (hashid, slot);
+ while (!NILP (Fgethash (make_int (id),
+ hashtable, Qnil)))
+ {
+ id = GUI_ITEM_ID_BITS (id + 1, slot);
+ }
+ return id;
+}
+
+int
+gui_item_equal_sans_selected (Lisp_Object obj1, Lisp_Object obj2, int depth)
+{
+ Lisp_Gui_Item *p1 = XGUI_ITEM (obj1);
+ Lisp_Gui_Item *p2 = XGUI_ITEM (obj2);
+
+ if (!(internal_equal (p1->name, p2->name, depth + 1)
+ &&
+ internal_equal (p1->callback, p2->callback, depth + 1)
+ &&
+ internal_equal (p1->callback_ex, p2->callback_ex, depth + 1)
+ &&
+ EQ (p1->suffix, p2->suffix)
+ &&
+ EQ (p1->active, p2->active)
+ &&
+ EQ (p1->included, p2->included)
+ &&
+ EQ (p1->config, p2->config)
+ &&
+ EQ (p1->filter, p2->filter)
+ &&
+ EQ (p1->style, p2->style)
+ &&
+ EQ (p1->accelerator, p2->accelerator)
+ &&
+ EQ (p1->keys, p2->keys)
+ &&
+ EQ (p1->value, p2->value)))
+ return 0;
+ return 1;
+}
+
+static int
+gui_item_equal (Lisp_Object obj1, Lisp_Object obj2, int depth)
+{
+ Lisp_Gui_Item *p1 = XGUI_ITEM (obj1);
+ Lisp_Gui_Item *p2 = XGUI_ITEM (obj2);
+
+ if (!(gui_item_equal_sans_selected (obj1, obj2, depth)
+ &&
+ EQ (p1->selected, p2->selected)))
+ return 0;
+ return 1;
+}
+
+static void
+print_gui_item (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
+{
+ Lisp_Gui_Item *g = XGUI_ITEM (obj);
+ char buf[20];
+
+ if (print_readably)
+ error ("printing unreadable object #<gui-item 0x%x>", g->header.uid);
+
+ write_c_string ("#<gui-item ", printcharfun);
+ sprintf (buf, "0x%x>", g->header.uid);
+ write_c_string (buf, printcharfun);
+}
+
+Lisp_Object
+copy_gui_item (Lisp_Object gui_item)
+{
+ Lisp_Object ret = allocate_gui_item ();
+ Lisp_Gui_Item *lp, *g = XGUI_ITEM (gui_item);
+
+ lp = XGUI_ITEM (ret);
+ lp->name = g->name;
+ lp->callback = g->callback;
+ lp->callback_ex = g->callback_ex;
+ lp->suffix = g->suffix;
+ lp->active = g->active;
+ lp->included = g->included;
+ lp->config = g->config;
+ lp->filter = g->filter;
+ lp->style = g->style;
+ lp->selected = g->selected;
+ lp->keys = g->keys;
+ lp->accelerator = g->accelerator;
+ lp->value = g->value;
+
+ return ret;
+}
+
+Lisp_Object
+copy_gui_item_tree (Lisp_Object arg)
+{
+ if (CONSP (arg))
+ {
+ Lisp_Object rest = arg = Fcopy_sequence (arg);
+ while (CONSP (rest))
+ {
+ XCAR (rest) = copy_gui_item_tree (XCAR (rest));
+ rest = XCDR (rest);
+ }
+ return arg;
+ }
+ else if (GUI_ITEMP (arg))
+ return copy_gui_item (arg);
+ else
+ return arg;
+}
+
+/* parse a glyph descriptor into a tree of gui items.
+
+ The gui_item slot of an image instance can be a single item or an
+ arbitrarily nested hierarchy of item lists. */
+
+static Lisp_Object
+parse_gui_item_tree_item (Lisp_Object entry)
+{
+ Lisp_Object ret = entry;
+ struct gcpro gcpro1;
+
+ GCPRO1 (ret);
+
+ if (VECTORP (entry))
+ {
+ ret = gui_parse_item_keywords_no_errors (entry);
+ }
+ else if (STRINGP (entry))
+ {
+ CHECK_STRING (entry);
+ }
+ else
+ syntax_error ("item must be a vector or a string", entry);
+
+ RETURN_UNGCPRO (ret);
+}
+
+Lisp_Object
+parse_gui_item_tree_children (Lisp_Object list)
+{
+ Lisp_Object rest, ret = Qnil, sub = Qnil;
+ struct gcpro gcpro1, gcpro2;
+
+ GCPRO2 (ret, sub);
+ CHECK_CONS (list);
+ /* recursively add items to the tree view */
+ LIST_LOOP (rest, list)
+ {
+ if (CONSP (XCAR (rest)))
+ sub = parse_gui_item_tree_list (XCAR (rest));
+ else
+ sub = parse_gui_item_tree_item (XCAR (rest));
+
+ ret = Fcons (sub, ret);
+ }
+ /* make the order the same as the items we have parsed */
+ RETURN_UNGCPRO (Fnreverse (ret));
+}
+
+static Lisp_Object
+parse_gui_item_tree_list (Lisp_Object list)
+{
+ Lisp_Object ret;
+ struct gcpro gcpro1;
+ CHECK_CONS (list);
+ /* first one can never be a list */
+ ret = parse_gui_item_tree_item (XCAR (list));
+ GCPRO1 (ret);
+ ret = Fcons (ret, parse_gui_item_tree_children (XCDR (list)));
+ RETURN_UNGCPRO (ret);
+}
+
+static void
+finalize_gui_item (void* header, int for_disksave)
+{
+}
+
+DEFINE_LRECORD_IMPLEMENTATION ("gui-item", gui_item,
+ mark_gui_item, print_gui_item,
+ finalize_gui_item, gui_item_equal,
+ gui_item_hash,
+ 0,
+ Lisp_Gui_Item);
+
+void
+syms_of_gui (void)
+{
+ INIT_LRECORD_IMPLEMENTATION (gui_item);
+
+ DEFSYMBOL (Qmenu_no_selection_hook);
+
+#ifdef HAVE_POPUPS
+ DEFSUBR (Fpopup_up_p);
+#endif
+}
+
+void
+vars_of_gui (void)
+{
+ DEFVAR_LISP ("menu-no-selection-hook", &Vmenu_no_selection_hook /*
+Function or functions to call when a menu or dialog box is dismissed
+without a selection having been made.
+*/ );
+ Vmenu_no_selection_hook = Qnil;
+}