--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui.c	Mon Aug 13 11:28:15 2007 +0200
@@ -0,0 +1,653 @@
+/* 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. */
+
+#include <config.h>
+#include "lisp.h"
+#include "gui.h"
+#include "elhash.h"
+#include "bytecode.h"
+
+Lisp_Object Q_active, Q_suffix, Q_keys, Q_style, Q_selected;
+Lisp_Object Q_filter, Q_config, Q_included, Q_key_sequence;
+Lisp_Object Q_accelerator, Q_label, Q_callback;
+Lisp_Object Qtoggle, Qradio;
+
+static Lisp_Object parse_gui_item_tree_list (Lisp_Object list);
+
+#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 char *s)
+{
+  CONST char *p;
+  char 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 (SYMBOLP (data)
+      || (COMPILED_FUNCTIONP (data)
+	  && XCOMPILED_FUNCTION (data)->flags.interactivep)
+      || (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.
+ */
+void
+gui_item_add_keyval_pair (Lisp_Object gui_item,
+			  Lisp_Object key, Lisp_Object val, 
+			  Error_behavior errb)
+{
+  struct Lisp_Gui_Item* pgui_item = XGUI_ITEM (gui_item);
+
+  if (!KEYWORDP (key))
+    signal_simple_error_2 ("Non-keyword in gui item", key, pgui_item->name);
+
+  if	  (EQ (key, Q_suffix))	 pgui_item->suffix   = val;
+  else if (EQ (key, Q_active))	 pgui_item->active   = val;
+  else if (EQ (key, Q_included)) pgui_item->included = val;
+  else if (EQ (key, Q_config))	 pgui_item->config   = val;
+  else if (EQ (key, Q_filter))	 pgui_item->filter   = val;
+  else if (EQ (key, Q_style))	 pgui_item->style    = val;
+  else if (EQ (key, Q_selected)) pgui_item->selected = val;
+  else if (EQ (key, Q_keys))	 pgui_item->keys     = val;
+  else if (EQ (key, Q_callback))	 pgui_item->callback     = val;
+  else if (EQ (key, Q_key_sequence)) ;   /* ignored for FSF compatability */
+  else if (EQ (key, Q_label)) ;   /* ignored for 21.0 implement in 21.2  */
+  else if (EQ (key, Q_accelerator))
+    {
+      if (SYMBOLP (val) || CHARP (val))
+	pgui_item->accelerator = val;
+      else if (ERRB_EQ (errb, ERROR_ME))
+	signal_simple_error ("Bad keyboard accelerator", val);
+    }
+  else if (ERRB_EQ (errb, ERROR_ME))
+    signal_simple_error_2 ("Unknown keyword in gui item", key, pgui_item->name);
+}
+
+void
+gui_item_init (Lisp_Object gui_item)
+{
+  struct Lisp_Gui_Item *lp = XGUI_ITEM (gui_item);
+
+  lp->name     = Qnil;
+  lp->callback = 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;
+}
+
+Lisp_Object
+allocate_gui_item (void)
+{
+  struct Lisp_Gui_Item *lp =
+    alloc_lcrecord_type (struct 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 ();
+  struct Lisp_Gui_Item* pgui_item = XGUI_ITEM (gui_item);
+
+  CHECK_VECTOR (item);
+  length = XVECTOR_LENGTH (item);
+  contents = XVECTOR_DATA (item);
+
+  if (length < 1)
+    signal_simple_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)
+	signal_simple_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;
+}
+
+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)
+{
+  struct 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->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);
+}
+
+/*
+ * 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)
+{
+  struct Lisp_Gui_Item* pgui = XGUI_ITEM (gui_item);
+  
+  if (!NILP (pgui->accelerator))
+    return pgui->accelerator;
+
+  else
+    return pgui->name;
+}
+
+Lisp_Object
+gui_name_accelerator (Lisp_Object nm)
+{
+  /* !!#### This function has not been Mule-ized */
+  char* name = (char*)XSTRING_DATA (nm);
+
+  while (*name) {
+    if (*name=='%') {
+      ++name;
+      if (!(*name))
+	return Qnil;
+      if (*name=='_' && *(name+1))
+	{
+	  int accelerator = (int) (unsigned char) (*(name+1));
+	  return make_char (tolower (accelerator));
+	}
+    }
+    ++name;
+  }
+  return Qnil;
+}
+
+/*
+ * 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)));
+}
+
+/*
+ * 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 */
+  struct 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)
+{
+  signal_simple_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;
+  struct 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)
+{
+  struct 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) > buf_len)
+	signal_too_long_error (pgui_item->name);
+      strcpy (buf, (CONST char *) XSTRING_DATA (pgui_item->keys));
+      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)
+{
+  struct Lisp_Gui_Item *p = XGUI_ITEM (obj);
+
+  mark_object (p->name);
+  mark_object (p->callback);
+  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);
+
+  return Qnil;
+}
+
+static unsigned long
+gui_item_hash (Lisp_Object obj, int depth)
+{
+  struct Lisp_Gui_Item *p = XGUI_ITEM (obj);
+
+  return HASH2 (HASH5 (internal_hash (p->name, depth + 1),
+		       internal_hash (p->callback, depth + 1),
+		       internal_hash (p->suffix, depth + 1),
+		       internal_hash (p->active, depth + 1),
+		       internal_hash (p->included, depth + 1)),
+		HASH5 (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)));
+}
+
+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;
+}
+
+static int
+gui_item_equal (Lisp_Object obj1, Lisp_Object obj2, int depth)
+{
+  struct Lisp_Gui_Item *p1 = XGUI_ITEM (obj1);
+  struct Lisp_Gui_Item *p2 = XGUI_ITEM (obj2);
+
+  if (!(internal_equal (p1->name, p2->name, depth + 1)
+	&&
+	internal_equal (p1->callback, p2->callback, 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->selected, p2->selected)
+	&&
+	EQ (p1->accelerator, p2->accelerator)
+	&&
+	EQ (p1->keys, p2->keys)))
+    return 0;
+  return 1;
+}
+
+static void
+print_gui_item (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
+{
+  struct 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);
+}
+
+/* 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;
+  if (VECTORP (entry))
+    {
+      ret =  gui_parse_item_keywords_no_errors (entry);
+    }
+  else if (STRINGP (entry))
+    {
+      CHECK_STRING (entry);
+    }
+  else
+    signal_simple_error ("item must be a vector or a string", entry);
+
+  return ret;
+}
+
+Lisp_Object parse_gui_item_tree_children (Lisp_Object list)
+{
+  Lisp_Object rest, ret = Qnil;
+  CHECK_CONS (list);
+  /* recursively add items to the tree view */
+  LIST_LOOP (rest, list)
+    {
+      Lisp_Object sub;
+      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 Fnreverse (ret);
+}
+
+static Lisp_Object parse_gui_item_tree_list (Lisp_Object list)
+{
+  Lisp_Object ret;
+  CHECK_CONS (list);
+  /* first one can never be a list */
+  ret = parse_gui_item_tree_item (XCAR (list));
+  return Fcons (ret, parse_gui_item_tree_children (XCDR (list)));
+}
+
+DEFINE_LRECORD_IMPLEMENTATION ("gui-item", gui_item,
+			       mark_gui_item, print_gui_item,
+			       0, gui_item_equal,
+			       gui_item_hash,
+			       0,
+			       struct Lisp_Gui_Item);
+
+void
+syms_of_gui (void)
+{
+  defkeyword (&Q_active,   ":active");
+  defkeyword (&Q_suffix,   ":suffix");
+  defkeyword (&Q_keys,     ":keys");
+  defkeyword (&Q_key_sequence,":key-sequence");
+  defkeyword (&Q_style,    ":style");
+  defkeyword (&Q_selected, ":selected");
+  defkeyword (&Q_filter,   ":filter");
+  defkeyword (&Q_config,   ":config");
+  defkeyword (&Q_included, ":included");
+  defkeyword (&Q_accelerator, ":accelerator");
+  defkeyword (&Q_label, ":label");
+  defkeyword (&Q_callback, ":callback");
+
+  defsymbol (&Qtoggle, "toggle");
+  defsymbol (&Qradio, "radio");
+
+#ifdef HAVE_POPUPS
+  DEFSUBR (Fpopup_up_p);
+#endif
+}
+
+void
+vars_of_gui (void)
+{
+}