--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lwlib/lwlib-Xlw.c	Mon Aug 13 11:28:15 2007 +0200
@@ -0,0 +1,602 @@
+/* The lwlib interface to "xlwmenu" menus.
+   Copyright (C) 1992, 1994 Lucid, Inc.
+
+This file is part of the Lucid Widget Library.
+
+The Lucid Widget Library 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.
+
+The Lucid Widget Library 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.  */
+
+#include <config.h>
+#include <stdlib.h> /* for abort () */
+#include <stdio.h> /* for abort () */
+#include <limits.h>
+
+#include "lwlib-Xlw.h"
+#include "lwlib-utils.h"
+#include <X11/StringDefs.h>
+#include <X11/IntrinsicP.h>
+#include <X11/ObjectP.h>
+#include <X11/CompositeP.h>
+#include <X11/Shell.h>
+#ifdef HAVE_WIDGETS
+#include "../src/EmacsManager.h"
+#endif
+#ifdef LWLIB_MENUBARS_LUCID
+#include "xlwmenu.h"
+#endif
+#ifdef LWLIB_SCROLLBARS_LUCID
+#include "xlwscrollbar.h"
+#endif
+#ifdef LWLIB_TABS_LUCID
+#ifdef NEED_MOTIF
+#include "lwlib-Xm.h"
+#endif
+#ifdef NEED_ATHENA
+#include "lwlib-Xaw.h"
+#endif
+#include "../src/xmu.h"
+#include "xlwtabs.h"
+#endif
+
+
+
+#ifdef LWLIB_MENUBARS_LUCID
+
+/* Menu callbacks */
+
+static void
+pre_hook (Widget w, XtPointer client_data, XtPointer call_data)
+{
+  widget_instance* instance = (widget_instance*)client_data;
+  widget_value* val;
+  
+  if (w->core.being_destroyed)
+    return;
+
+  val = lw_get_widget_value_for_widget (instance, w);
+#if 0
+  /* #### - this code used to (for some random back_asswards reason) pass
+  the expression below in the call_data slot.  For incremental menu
+  construction, this needs to go.  I can't even figure out why it was done
+  this way in the first place...it's just a historical weirdism. --Stig */
+  call_data = (val ? val->call_data : NULL);
+#endif 
+  if (val && val->call_data)
+    abort();			/* #### - the call_data for the top_level
+				   "menubar" widget_value used to be passed
+				   back to the pre_hook. */
+
+  if (instance->info->pre_activate_cb)
+    instance->info->pre_activate_cb (w, instance->info->id, call_data);
+}
+
+static void
+pick_hook (Widget w, XtPointer client_data, XtPointer call_data)
+{
+  widget_instance* instance = (widget_instance*)client_data;
+  widget_value* contents_val = (widget_value*)call_data;
+  widget_value* widget_val;
+  XtPointer widget_arg;
+  LWLIB_ID id;
+  lw_callback post_activate_cb;
+
+  if (w->core.being_destroyed)
+    return;
+
+  /* Grab these values before running any functions, in case running
+     the selection_cb causes the widget to be destroyed. */
+  id = instance->info->id;
+  post_activate_cb = instance->info->post_activate_cb;
+
+  widget_val = lw_get_widget_value_for_widget (instance, w);
+  widget_arg = widget_val ? widget_val->call_data : NULL;
+
+  if (instance->info->selection_cb &&
+      contents_val &&
+      contents_val->enabled &&
+      !contents_val->contents)
+    instance->info->selection_cb (w, id, contents_val->call_data);
+
+  if (post_activate_cb)
+    post_activate_cb (w, id, widget_arg);
+}
+
+
+
+/* creation functions */
+static Widget
+xlw_create_menubar (widget_instance* instance)
+{
+  Arg al [1];
+  Widget widget;
+  
+  XtSetArg (al [0], XtNmenu, instance->info->val);
+  widget = XtCreateWidget (instance->info->name, xlwMenuWidgetClass,
+			   instance->parent, al, 1);
+  XtAddCallback (widget, XtNopen,   pre_hook,  (XtPointer)instance);
+  XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
+  return widget;
+}
+
+static Widget
+xlw_create_popup_menu (widget_instance* instance)
+{
+  Arg al [2];
+  Widget popup_shell, widget;
+  
+  popup_shell = XtCreatePopupShell (instance->info->name,
+				    overrideShellWidgetClass,
+				    instance->parent, NULL, 0);
+  XtSetArg (al [0], XtNmenu, instance->info->val);
+  XtSetArg (al [1], XtNhorizontal, False);
+  widget = XtCreateManagedWidget ("popup", xlwMenuWidgetClass,
+				  popup_shell, al, 2);
+  XtAddCallback (widget, XtNselect, pick_hook, (XtPointer)instance);
+
+  return popup_shell;
+}
+#endif /* LWLIB_MENUBARS_LUCID */
+
+#ifdef LWLIB_SCROLLBARS_LUCID
+static void
+xlw_scrollbar_callback (Widget widget, XtPointer closure, XtPointer call_data)
+{
+  widget_instance *instance = (widget_instance *) closure;
+  LWLIB_ID id;
+  XlwScrollBarCallbackStruct *data =
+    (XlwScrollBarCallbackStruct *) call_data;
+  scroll_event event_data;
+  scrollbar_values *val =
+    (scrollbar_values *) instance->info->val->scrollbar_data;
+  double percent;
+
+  if (!instance || widget->core.being_destroyed)
+    return;
+
+  id = instance->info->id;
+
+  percent = (double) (data->value - 1) / (double) (INT_MAX - 1);
+  event_data.slider_value =
+    (int) (percent * (double) (val->maximum - val->minimum)) + val->minimum;
+
+  if (event_data.slider_value > val->maximum - val->slider_size)
+      event_data.slider_value = val->maximum - val->slider_size;
+  else if (event_data.slider_value < val->minimum)
+           event_data.slider_value = val->minimum;
+
+  if (data->event)
+    {
+      switch (data->event->type)
+	{
+	case KeyPress:
+	case KeyRelease:
+	  event_data.time = data->event->xkey.time;
+	  break;
+	case ButtonPress:
+	case ButtonRelease:
+	  event_data.time = data->event->xbutton.time;
+	  break;
+	case MotionNotify:
+	  event_data.time = data->event->xmotion.time;
+	  break;
+	case EnterNotify:
+	case LeaveNotify:
+	  event_data.time = data->event->xcrossing.time;
+	  break;
+	default:
+	  event_data.time = 0;
+	  break;
+	}
+    }
+  else
+    event_data.time = 0;
+
+  switch (data->reason)
+    {
+    case XmCR_DECREMENT:	event_data.action = SCROLLBAR_LINE_UP;   break;
+    case XmCR_INCREMENT:	event_data.action = SCROLLBAR_LINE_DOWN; break;
+    case XmCR_PAGE_DECREMENT:	event_data.action = SCROLLBAR_PAGE_UP;   break;
+    case XmCR_PAGE_INCREMENT:	event_data.action = SCROLLBAR_PAGE_DOWN; break;
+    case XmCR_TO_TOP:		event_data.action = SCROLLBAR_TOP;       break;
+    case XmCR_TO_BOTTOM:	event_data.action = SCROLLBAR_BOTTOM;    break;
+    case XmCR_DRAG:		event_data.action = SCROLLBAR_DRAG;      break;
+    case XmCR_VALUE_CHANGED:	event_data.action = SCROLLBAR_CHANGE;    break;
+    default:			event_data.action = SCROLLBAR_CHANGE;    break;
+    }
+
+  if (instance->info->pre_activate_cb)
+    instance->info->pre_activate_cb (widget, id, (XtPointer) &event_data);
+}
+
+#define add_scrollbar_callback(resource) \
+XtAddCallback (scrollbar, resource, xlw_scrollbar_callback, (XtPointer) instance)
+
+/* #### Does not yet support horizontal scrollbars. */
+static Widget
+xlw_create_scrollbar (widget_instance *instance, int vertical)
+{
+  Arg al[20];
+  int ac = 0;
+  static XtCallbackRec callbacks[2] =
+  { {xlw_scrollbar_callback, NULL}, {NULL, NULL} };
+
+  callbacks[0].closure  = (XtPointer) instance;
+
+  XtSetArg (al[ac], XmNminimum,       1); ac++;
+  XtSetArg (al[ac], XmNmaximum, INT_MAX); ac++;
+  XtSetArg (al[ac], XmNincrement,     1); ac++;
+  XtSetArg (al[ac], XmNpageIncrement, 1); ac++;
+  XtSetArg (al[ac], XmNorientation, (vertical ? XmVERTICAL : XmHORIZONTAL)); ac++;
+
+  XtSetArg (al[ac], XmNdecrementCallback,	callbacks); ac++;
+  XtSetArg (al[ac], XmNdragCallback,		callbacks); ac++;
+  XtSetArg (al[ac], XmNincrementCallback,	callbacks); ac++;
+  XtSetArg (al[ac], XmNpageDecrementCallback,	callbacks); ac++;
+  XtSetArg (al[ac], XmNpageIncrementCallback,	callbacks); ac++;
+  XtSetArg (al[ac], XmNtoBottomCallback,	callbacks); ac++;
+  XtSetArg (al[ac], XmNtoTopCallback,		callbacks); ac++;
+  XtSetArg (al[ac], XmNvalueChangedCallback,	callbacks); ac++;
+
+  return XtCreateWidget (instance->info->name, xlwScrollBarWidgetClass,
+			 instance->parent, al, ac);
+}
+
+static Widget
+xlw_create_vertical_scrollbar (widget_instance *instance)
+{
+  return xlw_create_scrollbar (instance, 1);
+}
+
+static Widget
+xlw_create_horizontal_scrollbar (widget_instance *instance)
+{
+  return xlw_create_scrollbar (instance, 0);
+}
+
+static void
+xlw_update_scrollbar (widget_instance *instance, Widget widget,
+		      widget_value *val)
+{
+  if (val->scrollbar_data)
+    {
+      scrollbar_values *data = val->scrollbar_data;
+      int widget_sliderSize, widget_val;
+      int new_sliderSize, new_value;
+      double percent;
+      Arg al [4];
+
+      /* First size and position the scrollbar widget. */
+      XtSetArg (al [0], XtNx,      data->scrollbar_x);
+      XtSetArg (al [1], XtNy,      data->scrollbar_y);
+      XtSetArg (al [2], XtNwidth,  data->scrollbar_width);
+      XtSetArg (al [3], XtNheight, data->scrollbar_height);
+      XtSetValues (widget, al, 4);
+
+      /* Now size the scrollbar's slider. */
+      XtSetArg (al [0], XmNsliderSize, &widget_sliderSize);
+      XtSetArg (al [1], XmNvalue,      &widget_val);
+      XtGetValues (widget, al, 2);
+
+      percent = (double) data->slider_size /
+	(double) (data->maximum - data->minimum);
+      percent = (percent > 1.0 ? 1.0 : percent);
+      new_sliderSize = (int) ((double) (INT_MAX - 1) * percent);
+
+      percent = (double) (data->slider_position - data->minimum) /
+	(double) (data->maximum - data->minimum);
+      percent = (percent > 1.0 ? 1.0 : percent);
+      new_value = (int) ((double) (INT_MAX - 1) * percent);
+
+      if (new_sliderSize > INT_MAX - 1)
+	new_sliderSize = INT_MAX - 1;
+      else if (new_sliderSize < 1)
+	new_sliderSize = 1;
+
+      if (new_value > (INT_MAX - new_sliderSize))
+	new_value = INT_MAX - new_sliderSize;
+      else if (new_value < 1)
+	new_value = 1;
+
+      if (new_sliderSize != widget_sliderSize || new_value != widget_val)
+	XlwScrollBarSetValues (widget, new_value, new_sliderSize, 1, 1, False);
+    }
+}
+
+#endif /* LWLIB_SCROLLBARS_LUCID */
+
+#ifdef LWLIB_TABS_LUCID
+/* tab control
+   
+   lwlib is such an incredible hairy crock. I just cannot believe
+   it! There are random dependencies between functions, there is a
+   total lack of genericity, even though it initially appears to be
+   generic. It should all be junked and begun again. Building tabs are
+   an example - in theory we should be able to reuse a lot of the
+   general stuff because we want to put labels of whatever toolkit we
+   are using in the tab. Instead we have to hack it by hand. */
+static void
+xlw_tab_control_callback (Widget w, XtPointer client_data, XtPointer call_data)
+{
+  /* call data is the topmost widget */
+  widget_instance* instance = (widget_instance*)client_data;
+  Widget top = (Widget)call_data;
+  char *name = XtName (top);
+  widget_value* widget_val;
+  XtPointer widget_arg;
+  LWLIB_ID id;
+  lw_callback post_activate_cb;
+
+  if (w->core.being_destroyed)
+    return;
+
+  /* Grab these values before running any functions, in case running
+     the selection_cb causes the widget to be destroyed. */
+  id = instance->info->id;
+  post_activate_cb = instance->info->post_activate_cb;
+
+  /* search for the widget_val for the selected tab */
+  for (widget_val = instance->info->val->contents; widget_val; 
+       widget_val = widget_val->next)
+    {
+      if (!strcmp (widget_val->name, name))
+	break;
+    }
+
+  widget_arg = widget_val ? widget_val->call_data : NULL;
+
+  if (instance->info->selection_cb &&
+      widget_val &&
+      widget_val->enabled &&
+      !widget_val->contents)
+    instance->info->selection_cb (w, id, widget_arg);
+
+  if (post_activate_cb)
+    post_activate_cb (w, id, widget_arg);
+}
+
+static Widget
+xlw_create_tab_control (widget_instance *instance)
+{
+  Arg al[20];
+  int ac = 0;
+  Widget tab = 0;
+  widget_value* val = instance->info->val;
+
+  XtSetArg (al [ac], XtNsensitive, val->enabled);		ac++;
+  XtSetArg (al [ac], XtNmappedWhenManaged, FALSE);	ac++;
+  XtSetArg (al [ac], XtNorientation, XtorientHorizontal);	ac++;
+  XtSetArg (al [ac], XtNresizable, False);			ac++;
+
+  /* add any args the user supplied for creation time */
+  lw_add_value_args_to_args (val, al, &ac);
+
+  tab = XtCreateManagedWidget (val->name, tabsWidgetClass,
+			       instance->parent, al, ac);
+  XtRemoveAllCallbacks (tab, XtNcallback);
+  XtAddCallback (tab, XtNcallback, xlw_tab_control_callback, (XtPointer)instance);
+
+  XtManageChild (tab);
+
+  return tab;
+}
+
+static void build_tabs_in_widget (widget_instance* instance, Widget widget, 
+				  widget_value* val)
+{
+  widget_value* cur = val;
+  for (cur = val; cur; cur = cur->next)
+    {
+      if (cur->value)
+	{
+#ifdef LWLIB_WIDGETS_MOTIF
+	  xm_create_label (widget, cur);
+#else
+	  xaw_create_label (widget, cur);
+#endif
+	}
+      cur->change = NO_CHANGE;
+    }
+}
+
+static void
+xlw_update_tab_control (widget_instance* instance, Widget widget, widget_value* val)
+{
+  Widget* children;
+  unsigned int num_children;
+  int i;
+  widget_value *cur = 0;
+
+  XtRemoveAllCallbacks (widget, XtNcallback);
+  XtAddCallback (widget, XtNcallback, xlw_tab_control_callback, (XtPointer)instance);
+
+  if (val->change == STRUCTURAL_CHANGE
+      ||
+      (val->contents && val->contents->change == STRUCTURAL_CHANGE))
+    {
+      destroy_all_children (widget);
+      build_tabs_in_widget (instance, widget, val->contents);
+    }
+
+  children = XtCompositeChildren (widget, &num_children);
+  if (children)
+    {
+      for (i = 0, cur = val->contents; i < num_children; i++)
+	{
+	  if (!cur)
+	    abort ();
+	  if (children [i]->core.being_destroyed
+	      || strcmp (XtName (children [i]), cur->name))
+	    continue;
+#ifdef NEED_MOTIF
+	  if (lw_motif_widget_p (children [i]))
+	    xm_update_one_widget (instance, children [i], cur, False);
+#endif
+#ifdef NEED_ATHENA
+	  if (lw_xaw_widget_p (children [i]))
+	    xaw_update_one_widget (instance, children [i], cur, False);
+#endif
+	  cur = cur->next;
+	}
+      XtFree ((char *) children);
+    }
+  if (cur)
+    abort ();
+}
+#endif /* LWLIB_TABS_LUCID */
+
+#ifdef HAVE_WIDGETS
+static Widget
+xlw_create_clip_window (widget_instance *instance)
+{
+  Arg al[20];
+  int ac = 0;
+  Widget clip = 0;
+  widget_value* val = instance->info->val;
+
+  XtSetArg (al [ac], XtNmappedWhenManaged, FALSE);	ac++;
+  XtSetArg (al [ac], XtNsensitive, TRUE);		ac++;
+  /* add any args the user supplied for creation time */
+  lw_add_value_args_to_args (val, al, &ac);
+
+  /* Create a clip window to contain the subwidget. Incredibly the
+     XEmacs manager seems to be the most appropriate widget for
+     this. Nothing else is simple enough and yet does what is
+     required. */
+  clip = XtCreateManagedWidget (val->name,
+				emacsManagerWidgetClass,
+				instance->parent, al, ac);
+
+  return clip;
+}
+#endif
+
+widget_creation_entry 
+xlw_creation_table [] =
+{
+#ifdef LWLIB_MENUBARS_LUCID
+  {"menubar", xlw_create_menubar},
+  {"popup", xlw_create_popup_menu},
+#endif
+#ifdef LWLIB_SCROLLBARS_LUCID
+  {"vertical-scrollbar",	xlw_create_vertical_scrollbar},
+  {"horizontal-scrollbar",	xlw_create_horizontal_scrollbar},
+#endif
+#ifdef LWLIB_TABS_LUCID
+  {"tab-control",	xlw_create_tab_control},
+#endif
+#ifdef HAVE_WIDGETS
+  {"clip-window", xlw_create_clip_window},
+#endif
+  {NULL, NULL}
+};
+
+Boolean
+lw_lucid_widget_p (Widget widget)
+{
+  WidgetClass the_class = XtClass (widget);
+#ifdef LWLIB_MENUBARS_LUCID
+  if (the_class == xlwMenuWidgetClass)
+    return True;
+#endif
+#ifdef LWLIB_SCROLLBARS_LUCID
+  if (the_class == xlwScrollBarWidgetClass)
+    return True;
+#endif
+#ifdef LWLIB_TABS_LUCID
+  if (the_class == tabsWidgetClass)
+    return True;
+#endif
+#ifdef LWLIB_MENUBARS_LUCID
+  if (the_class == overrideShellWidgetClass)
+    return
+      XtClass (((CompositeWidget)widget)->composite.children [0])
+	== xlwMenuWidgetClass;
+#endif
+  return False;
+}
+
+void
+xlw_update_one_widget (widget_instance* instance, Widget widget,
+		       widget_value* val, Boolean deep_p)
+{
+  WidgetClass class = XtClass (widget);
+
+  if (0)
+    ;
+#ifdef LWLIB_MENUBARS_LUCID
+  else if (class == xlwMenuWidgetClass)
+    {
+      XlwMenuWidget mw;
+      Arg al [1];
+      if (XtIsShell (widget))
+	mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
+      else
+	mw = (XlwMenuWidget)widget;
+      XtSetArg (al [0], XtNmenu, val);
+      XtSetValues (widget, al, 1);
+    }
+#endif
+#ifdef LWLIB_SCROLLBARS_LUCID
+  else if (class == xlwScrollBarWidgetClass)
+    {
+      xlw_update_scrollbar (instance, widget, val);
+    }
+#endif
+#ifdef LWLIB_TABS_LUCID
+  else if (class == tabsWidgetClass)
+    {
+      xlw_update_tab_control (instance, widget, val);
+    }
+#endif
+}
+
+void
+xlw_update_one_value (widget_instance* instance, Widget widget,
+		      widget_value* val)
+{
+  return;
+}
+
+void
+xlw_pop_instance (widget_instance* instance, Boolean up)
+{
+}
+
+#ifdef LWLIB_MENUBARS_LUCID
+void
+xlw_popup_menu (Widget widget, XEvent *event)
+{
+  XlwMenuWidget mw;
+
+  if (!XtIsShell (widget))
+    return;
+
+  if (event->type == ButtonPress || event->type == ButtonRelease)
+    {
+      mw = (XlwMenuWidget)((CompositeWidget)widget)->composite.children [0];
+      xlw_pop_up_menu (mw, (XButtonPressedEvent *)event);
+    }
+  else
+    abort ();
+}
+#endif /* LWLIB_MENUBARS_LUCID */
+
+/* Destruction of instances */
+void
+xlw_destroy_instance (widget_instance* instance)
+{
+  if (instance->widget)
+    XtDestroyWidget (instance->widget);
+}