#!/usr/bin/perl -w
# -*- cperl -*-
#
# gtk-doc - GTK DocBook documentation generator.
# Copyright (C) 1998  Damon Chaplin
#
# This program 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 of the License, or
# (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

#
# This gets information about object heirarchies and signals
# by compiling a small C program. CFLAGS and LDFLAGS must be
# set appropriately before running this script.
#
# NOTE: the lookup_signal_arg_names() function contains the argument names of
#       standard GTK signal handlers. This may need to be updated for new
#       GTK signals or Gnome widget signals.

use Getopt::Long;

unshift @INC, "/usr/share/gtk-doc";
require "gtkdoc-common.pl";

# Options

# name of documentation module
my $MODULE;
my $OUTPUT_DIR;
my $PRINT_VERSION;

%optctl = (module => \$MODULE,
	   types => \$TYPES_FILE,
	   nogtkinit => \$NO_GTK_INIT,
	   'output-dir' => \$OUTPUT_DIR,
	   'version' => \$PRINT_VERSION);
	   
GetOptions(\%optctl, "module=s", "types:s", "output-dir:s", "nogtkinit", "version");

if ($PRINT_VERSION) {
    print "1.0\n";
    exit 0;
}

$OUTPUT_DIR = $OUTPUT_DIR ? $OUTPUT_DIR : ".";

$TYPES_FILE = $TYPES_FILE ? $TYPES_FILE : "$OUTPUT_DIR/$MODULE.types";

open TYPES, $TYPES_FILE || die "Cannot open $TYPES_FILE: $!\n";
open OUTPUT, ">$MODULE-scan.c" || die "Cannot open $MODULE-scan.c: $!\n";

my $old_signals_filename = "$OUTPUT_DIR/$MODULE.signals";
my $new_signals_filename = "$OUTPUT_DIR/$MODULE.signals.new";
my $old_hierarchy_filename = "$OUTPUT_DIR/$MODULE.hierarchy";
my $new_hierarchy_filename = "$OUTPUT_DIR/$MODULE.hierarchy.new";
my $old_args_filename = "$OUTPUT_DIR/$MODULE.args";
my $new_args_filename = "$OUTPUT_DIR/$MODULE.args.new";

# write a C program to scan the types

$includes = "";
@types = ();

for (<TYPES>) {
    if (/^#include/) {
	$includes .= $_;
    } elsif (/^%/) {
	next;
    } elsif (/^\s*$/) {
	next;
    } else {
	chomp;
	push @types, $_;
    }
}

$ntypes = @types + 1;

print OUTPUT <<EOT;
#include <string.h>
#include <stdio.h>

$includes
GtkType object_types[$ntypes];

GtkType *
get_object_types (void)
{
    gint i = 0;
EOT

for (@types) {
    print OUTPUT "    object_types[i++] = $_ ();\n";
}

print OUTPUT <<EOT;
    object_types[i] = 0;

    return object_types;
}

/*
 * This uses GTK type functions to output signal prototypes and the widget
 * hierarchy.
 */

/* The output files */
gchar *signals_filename = "$new_signals_filename";
gchar *hierarchy_filename = "$new_hierarchy_filename";
gchar *args_filename = "$new_args_filename";


static void output_signals (void);
static void output_widget_signals (FILE *fp,
				   GtkType object_type);
static void output_widget_signal (FILE *fp,
				  GtkType object_type,
				  gchar *object_class_name,
				  guint signal_id);
static gchar * get_type_name (GtkType type,
			      gboolean * is_pointer);
static gchar * get_gdk_event (const gchar * signal_name);
static gchar ** lookup_signal_arg_names (gchar * type,
					 const gchar * signal_name);

static void output_widget_hierarchy (void);
static void output_hierarchy (FILE *fp,
			      GtkType type,
			      gint level);

static void output_args (void);
static void output_widget_args (FILE *fp, GtkType object_type);

int
main (int argc, char *argv[])
{
EOT

  if ($NO_GTK_INIT) {
    print OUTPUT <<EOT;
  gtk_type_init ();
EOT
  } else {
    print OUTPUT <<EOT;
  gtk_init (&argc, &argv);
EOT
  }

print OUTPUT <<EOT;
  get_object_types ();

  output_signals ();
  output_widget_hierarchy ();
  output_args ();

  return 0;
}


static void
output_signals (void)
{
  FILE *fp;
  gint i;

  fp = fopen (signals_filename, "w");
  if (fp == NULL)
    {
      g_warning ("Couldn't open output file: %s", signals_filename);
      return;
    }

  for (i = 0; object_types[i]; i++)
    output_widget_signals (fp, object_types[i]);

  fclose (fp);
}


/* This outputs all the signals of one widget. */
static void
output_widget_signals (FILE *fp, GtkType object_type)
{
  GtkObjectClass *class;
  gchar *object_class_name;
  guint sig;

  class = gtk_type_class (object_type);
  if (!class || class->nsignals == 0)
    return;

  object_class_name = gtk_type_name (object_type);

  for (sig = 0; sig < class->nsignals; sig++)
    {
      if (!class->signals[sig])
        {
          /*g_print ("Signal slot [%u] is empty\\n", sig);*/
          continue;
        }

      output_widget_signal (fp, object_type, object_class_name,
			    class->signals[sig]);
    }
}


/* This outputs one signal. */
static void
output_widget_signal (FILE *fp,
		      GtkType object_type,
		      gchar *object_name,
		      guint signal_id)
{
  GtkSignalQuery *query_info;
  gchar *ret_type, *pos, *type_name, *arg_name, *object_arg, *object_arg_start;
  gboolean is_pointer;
  gchar ret_type_buffer[1024], buffer[1024];
  gint i, param;
  gchar **arg_names;
  gint param_num, widget_num, event_num, callback_num;
  gint *arg_num;
  gchar signal_name[128];


  /*  g_print ("Object: %s Type: %i Signal: %u\\n", object_name, object_type,
      signal_id);*/

  param_num = 1;
  widget_num = event_num = callback_num = 0;

  query_info = gtk_signal_query (signal_id);
  if (query_info == NULL)
    {
      g_warning ("Couldn't query signal");
      return;
    }

  /* Output the return type and function name. */
  ret_type = get_type_name (query_info->return_val, &is_pointer);
  sprintf (ret_type_buffer, "%s%s", ret_type, is_pointer ? "*" : "");

  /* Output the signal object type and the argument name. We assume the
     type is a pointer - I think that is OK. We remove "Gtk" or "Gnome" and
     convert to lower case for the argument name. */
  pos = buffer;
  sprintf (pos, "%s ", object_name);
  pos += strlen (pos);

  if (!strncmp (object_name, "Gtk", 3))
      object_arg = object_name + 3;
  else if (!strncmp (object_name, "Gnome", 5))
      object_arg = object_name + 5;
  else
      object_arg = object_name;

  object_arg_start = pos;
  sprintf (pos, "*%s\\n", object_arg);
  pos += strlen (pos);
  g_strdown (object_arg_start);
  if (!strcmp (object_arg_start, "widget"))
    widget_num++;
  
  /* Convert signal name to use underscores rather than dashes '-'. */
  strcpy (signal_name, query_info->signal_name);
  for (i = 0; signal_name[i]; i++)
    {
      if (signal_name[i] == '-')
	signal_name[i] = '_';
    }

  /* Output the signal parameters. */
  arg_names = lookup_signal_arg_names (object_name, signal_name);

  for (param = 0; param < query_info->nparams; param++)
    {
      if (arg_names)
	{
	  sprintf (pos, "%s\\n", arg_names[param]);
	  pos += strlen (pos);
	}
      else
	{
	  type_name = get_type_name (query_info->params[param], &is_pointer);

	  /* Most arguments to the callback are called "arg1", "arg2", etc.
	     GdkWidgets are called "widget", "widget2", ...
	     GdkEvents are called "event", "event2", ...
	     GtkCallbacks are called "callback", "callback2", ... */
	  if (!strcmp (type_name, "GtkWidget"))
	    {
	      arg_name = "widget";
	      arg_num = &widget_num;
	    }
	  else if (!strcmp (type_name, "GdkEvent"))
	    {
	      type_name = get_gdk_event (signal_name);
	      arg_name = "event";
	      arg_num = &event_num;
	      is_pointer = TRUE;
	    }
	  else if (!strcmp (type_name, "GtkCallback")
		   || !strcmp (type_name, "GtkCCallback"))
	    {
	      arg_name = "callback";
	      arg_num = &callback_num;
	    }
	  else
	    {
	      arg_name = "arg";
	      arg_num = &param_num;
	    }
	  sprintf (pos, "%s ", type_name);
	  pos += strlen (pos);

	  if (!arg_num || *arg_num == 0)
	    sprintf (pos, "%s%s\\n", is_pointer ? "*" : " ", arg_name);
	  else
	    sprintf (pos, "%s%s%i\\n", is_pointer ? "*" : " ", arg_name,
		     *arg_num);
	      pos += strlen (pos);
	      
	      if (arg_num)
		*arg_num += 1;
	}
    }
  
  fprintf (fp,
	   "<SIGNAL>\\n<NAME>%s::%s</NAME>\\n<RETURNS>%s</RETURNS>\\n%s</SIGNAL>\\n\\n",
	   object_name, query_info->signal_name, ret_type_buffer, buffer);
  g_free (query_info);
}


/* Returns the type name to use for a signal argument or return value, given
   the GtkType from the signal info. It also sets is_pointer to TRUE if the
   argument needs a '*' since it is a pointer. */
static gchar *
get_type_name (GtkType type, gboolean * is_pointer)
{
  gchar *type_name;

  *is_pointer = FALSE;
  type_name = gtk_type_name (type);

  switch (type) {
  case GTK_TYPE_NONE:
  case GTK_TYPE_CHAR:
  case GTK_TYPE_UCHAR:
  case GTK_TYPE_BOOL:
  case GTK_TYPE_INT:
  case GTK_TYPE_UINT:
  case GTK_TYPE_LONG:
  case GTK_TYPE_ULONG:
  case GTK_TYPE_FLOAT:
  case GTK_TYPE_DOUBLE:
  case GTK_TYPE_POINTER:
    /* These all have normal C type names so they are OK. */
    return type_name;

  case GTK_TYPE_STRING:
    /* A GtkString is really a gchar*. */
    *is_pointer = TRUE;
    return "gchar";

  case GTK_TYPE_ENUM:
  case GTK_TYPE_FLAGS:
    /* We use a gint for both of these. Hopefully a subtype with a decent
       name will be registered and used instead, as GTK+ does itself. */
    return "gint";

  case GTK_TYPE_BOXED:
    /* A boxed value is just an opaque pointer, I think. */
    return "gpointer";

  case GTK_TYPE_SIGNAL:
  case GTK_TYPE_ARGS:
  case GTK_TYPE_FOREIGN:
  case GTK_TYPE_CALLBACK:
  case GTK_TYPE_C_CALLBACK:
    /* FIXME: These are wrong. I think they expand into more than 1 argument.
       See the GtkArg struct in gtktypeutils.h and gtkargcollector.c.
       Fortunately I doubt anything uses these as signal args. */
    return "gpointer";

  default:
    break;
  }

  /* For all GtkObject subclasses we can use the class name with a "*",
     e.g. 'GtkWidget *'. */
  if (gtk_type_is_a (type, GTK_TYPE_OBJECT))
    *is_pointer = TRUE;

  return type_name;
}


static gchar *
get_gdk_event (const gchar * signal_name)
{
  static gchar *GbGDKEvents[] =
  {
    "button_press_event", "GdkEventButton",
    "button_release_event", "GdkEventButton",
    "motion_notify_event", "GdkEventMotion",
    "delete_event", "GdkEvent",
    "destroy_event", "GdkEvent",
    "expose_event", "GdkEventExpose",
    "key_press_event", "GdkEventKey",
    "key_release_event", "GdkEventKey",
    "enter_notify_event", "GdkEventCrossing",
    "leave_notify_event", "GdkEventCrossing",
    "configure_event", "GdkEventConfigure",
    "focus_in_event", "GdkEventFocus",
    "focus_out_event", "GdkEventFocus",
    "map_event", "GdkEvent",
    "unmap_event", "GdkEvent",
    "property_notify_event", "GdkEventProperty",
    "selection_clear_event", "GdkEventSelection",
    "selection_request_event", "GdkEventSelection",
    "selection_notify_event", "GdkEventSelection",
    "proximity_in_event", "GdkEventProximity",
    "proximity_out_event", "GdkEventProximity",
    "drag_begin_event", "GdkEventDragBegin",
    "drag_request_event", "GdkEventDragRequest",
    "drag_end_event", "GdkEventDragRequest",
    "drop_enter_event", "GdkEventDropEnter",
    "drop_leave_event", "GdkEventDropLeave",
    "drop_data_available_event", "GdkEventDropDataAvailable",
    "other_event", "GdkEventOther",
    "client_event", "GdkEventClient",
    "no_expose_event", "GdkEventNoExpose",
    NULL
  };

  gint i;

  for (i = 0; GbGDKEvents[i]; i += 2)
    {
      if (!strcmp (signal_name, GbGDKEvents[i]))
	return GbGDKEvents[i + 1];
    }
  return "GdkEvent";
}


/* This returns argument names to use for some known GTK signals.
    It is passed a widget name, e.g. 'GtkCList' and a signal name, e.g.
    'select_row' and it returns a pointer to an array of argument types and
    names. */
static gchar **
lookup_signal_arg_names (gchar * type, const gchar * signal_name)
{
  /* Each arg array starts with the object type name and the signal name,
     and then signal arguments follow. */
  static gchar *GbArgTable[][16] =
  {
    {"GtkCList", "select_row",
     "gint             row",
     "gint             column",
     "GdkEventButton  *event"},
    {"GtkCList", "unselect_row",
     "gint             row",
     "gint             column",
     "GdkEventButton  *event"},
    {"GtkCList", "click_column",
     "gint             column"},

    {"GtkCList", "resize_column",
     "gint             column",
     "gint             width"},

    {"GtkCList", "extend_selection",
     "GtkScrollType    scroll_type",
     "gfloat           position",
     "gboolean         auto_start_selection"},
    {"GtkCList", "scroll_vertical",
     "GtkScrollType    scroll_type",
     "gfloat           position"},
    {"GtkCList", "scroll_horizontal",
     "GtkScrollType    scroll_type",
     "gfloat           position"},
    {"GtkContainer", "focus",
     "GtkDirectionType direction"},
    {"GtkCTree", "tree_select_row",
     "GList           *node",
     "gint             column"},
    {"GtkCTree", "tree_unselect_row",
     "GList           *node",
     "gint             column"},

    {"GtkCTree", "tree_expand",
     "GList           *node"},
    {"GtkCTree", "tree_collapse",
     "GList           *node"},
    {"GtkCTree", "tree_move",
     "GList           *node",
     "GList           *new_parent",
     "GList           *new_sibling"},
    {"GtkCTree", "change_focus_row_expansion",
     "GtkCTreeExpansionType expansion"},

    {"GtkEditable", "insert_text",
     "gchar           *new_text",
     "gint             new_text_length",
     "gint            *position"},
    {"GtkEditable", "delete_text",
     "gint             start_pos",
     "gint             end_pos"},
    {"GtkEditable", "set_editable",
     "gboolean         is_editable"},
    {"GtkEditable", "move_cursor",
     "gint             x",
     "gint             y"},
    {"GtkEditable", "move_word",
     "gint             num_words"},
    {"GtkEditable", "move_page",
     "gint             x",
     "gint             y"},
    {"GtkEditable", "move_to_row",
     "gint             row"},
    {"GtkEditable", "move_to_column",
     "gint             column"},

    {"GtkEditable", "kill_char",
     "gint             direction"},
    {"GtkEditable", "kill_word",
     "gint             direction"},
    {"GtkEditable", "kill_line",
     "gint             direction"},


    {"GtkInputDialog", "enable_device",
     "gint             deviceid"},
    {"GtkInputDialog", "disable_device",
     "gint             deviceid"},

    {"GtkListItem", "extend_selection",
     "GtkScrollType    scroll_type",
     "gfloat           position",
     "gboolean         auto_start_selection"},
    {"GtkListItem", "scroll_vertical",
     "GtkScrollType    scroll_type",
     "gfloat           position"},
    {"GtkListItem", "scroll_horizontal",
     "GtkScrollType    scroll_type",
     "gfloat           position"},

    {"GtkMenuShell", "move_current",
     "GtkMenuDirectionType direction"},
    {"GtkMenuShell", "activate_current",
     "gboolean         force_hide"},


    {"GtkNotebook", "switch_page",
     "GtkNotebookPage *page",
     "gint             page_num"},
    {"GtkStatusbar", "text_pushed",
     "guint            context_id",
     "gchar           *text"},
    {"GtkStatusbar", "text_popped",
     "guint            context_id",
     "gchar           *text"},
    {"GtkTipsQuery", "widget_entered",
     "GtkWidget       *widget",
     "gchar           *tip_text",
     "gchar           *tip_private"},
    {"GtkTipsQuery", "widget_selected",
     "GtkWidget       *widget",
     "gchar           *tip_text",
     "gchar           *tip_private",
     "GdkEventButton  *event"},
    {"GtkToolbar", "orientation_changed",
     "GtkOrientation   orientation"},
    {"GtkToolbar", "style_changed",
     "GtkToolbarStyle  style"},
    {"GtkWidget", "draw",
     "GdkRectangle    *area"},
    {"GtkWidget", "size_request",
     "GtkRequisition  *requisition"},
    {"GtkWidget", "size_allocate",
     "GtkAllocation   *allocation"},
    {"GtkWidget", "state_changed",
     "GtkStateType     state"},
    {"GtkWidget", "style_set",
     "GtkStyle        *previous_style"},

    {"GtkWidget", "install_accelerator",
     "gchar           *signal_name",
     "gchar            key",
     "gint             modifiers"},

    {"GtkWidget", "add_accelerator",
     "guint            accel_signal_id",
     "GtkAccelGroup   *accel_group",
     "guint            accel_key",
     "GdkModifierType  accel_mods",
     "GtkAccelFlags    accel_flags"},

    {"GtkWidget", "parent_set",
     "GtkObject       *old_parent"},

    {"GtkWidget", "remove_accelerator",
     "GtkAccelGroup   *accel_group",
     "guint            accel_key",
     "GdkModifierType  accel_mods"},
    {"GtkWidget", "debug_msg",
     "gchar           *message"},
    {"GtkWindow", "move_resize",
     "gint            *x",
     "gint            *y",
     "gint             width",
     "gint             height"},
    {"GtkWindow", "set_focus",
     "GtkWidget       *widget"},

    {"GtkWidget", "selection_get",
     "GtkSelectionData *data",
     "guint            info",
     "guint            time"},
    {"GtkWidget", "selection_received",
     "GtkSelectionData *data",
     "guint            time"},

    {"GtkWidget", "drag_begin",
     "GdkDragContext  *drag_context"},
    {"GtkWidget", "drag_end",
     "GdkDragContext  *drag_context"},
    {"GtkWidget", "drag_data_delete",
     "GdkDragContext  *drag_context"},
    {"GtkWidget", "drag_leave",
     "GdkDragContext  *drag_context",
     "guint            time"},
    {"GtkWidget", "drag_motion",
     "GdkDragContext  *drag_context",
     "gint             x",
     "gint             y",
     "guint            time"},
    {"GtkWidget", "drag_drop",
     "GdkDragContext  *drag_context",
     "gint             x",
     "gint             y",
     "guint            time"},
    {"GtkWidget", "drag_data_get",
     "GdkDragContext  *drag_context",
     "GtkSelectionData *data",
     "guint            info",
     "guint            time"},
    {"GtkWidget", "drag_data_received",
     "GdkDragContext  *drag_context",
     "gint             x",
     "gint             y",
     "GtkSelectionData *data",
     "guint            info",
     "guint            time"},

    {NULL}
  };

  gint i;

  for (i = 0; GbArgTable[i][0]; i++)
    {
      if (!strcmp (type, GbArgTable[i][0])
	  && !strcmp (signal_name, GbArgTable[i][1]))
	return &GbArgTable[i][2];
    }
  return NULL;
}


/* This outputs the hierarchy of all widgets which have been initialized,
   i.e. by calling their XXX_get_type() initialization function. */
static void
output_widget_hierarchy (void)
{
  FILE *fp;

  fp = fopen (hierarchy_filename, "w");
  if (fp == NULL)
    {
      g_warning ("Couldn't open output file: %s", hierarchy_filename);
      return;
    }
  output_hierarchy (fp, GTK_TYPE_OBJECT, 0);
  fclose (fp);
}


/* This is called recursively to output the hierarchy of a widget. */
static void
output_hierarchy (FILE *fp,
		  GtkType type,
		  gint level)
{
  GList *list;
  guint i;

  if (!type)
    return;

  for (i = 0; i < level; i++)
    fprintf (fp, "  ");
  fprintf (fp, gtk_type_name (type));
  fprintf (fp, "\\n");

  list = gtk_type_children_types (type);

  while (list)
    {
      GtkType child = (GtkType) list->data;
      output_hierarchy (fp, child, level + 1);
      list = list->next;
    }
}


static void
output_args (void)
{
  FILE *fp;
  gint i;

  fp = fopen (args_filename, "w");
  if (fp == NULL)
    {
      g_warning ("Couldn't open output file: %s", args_filename);
      return;
    }

  for (i = 0; object_types[i]; i++)
    output_widget_args (fp, object_types[i]);

  fclose (fp);
}


static void
output_widget_args (FILE *fp, GtkType object_type)
{
  GtkObjectClass *class;
  gchar *object_class_name;
  GtkArg *args;
  guint32 *arg_flags;
  guint n_args;
  gint arg;
  gchar flags[16], *pos;

  class = gtk_type_class (object_type);
  if (!class)
    return;

  object_class_name = gtk_type_name (object_type);

  args = gtk_object_query_args (class->type, &arg_flags, &n_args);

  for (arg = 0; arg < n_args; arg++)
    {
      pos = flags;
      /* We use one-character flags for simplicity. */
      if (arg_flags[arg] & GTK_ARG_READABLE)
	*pos++ = 'r';
      if (arg_flags[arg] & GTK_ARG_WRITABLE)
	*pos++ = 'w';
      if (arg_flags[arg] & GTK_ARG_CONSTRUCT)
	*pos++ = 'x';
      if (arg_flags[arg] & GTK_ARG_CONSTRUCT_ONLY)
	*pos++ = 'X';
      if (arg_flags[arg] & GTK_ARG_CHILD_ARG)
	*pos++ = 'c';
      *pos = 0;

      fprintf (fp, "<ARG>\\n<NAME>%s</NAME>\\n<TYPE>%s</TYPE>\\n<FLAGS>%s</FLAGS>\\n</ARG>\\n\\n",
	       args[arg].name, gtk_type_name (args[arg].type), flags);
    }

  g_free (args);
  g_free (arg_flags);
}
EOT

close OUTPUT;

# Compile and run our file

$CC = $ENV{CC} ? $ENV{CC} : "gcc";
$LD = $ENV{LD} ? $ENV{LD} : $CC;
$CFLAGS = $ENV{CFLAGS} ? $ENV{CFLAGS} : "";
$LDFLAGS = $ENV{LDFLAGS} ? $ENV{LDFLAGS} : "";

my $o_file;
if ($CC =~ /libtool/) {
  $o_file  = "$MODULE-scan.lo"
} else {
  $o_file = "$MODULE-scan.o"
}

$command = "$CC $CFLAGS -c -o $o_file $MODULE-scan.c && $LD -o $MODULE-scan $o_file $LDFLAGS";

system($command) == 0 or die "Compilation of scanner failed\n";

system("./$MODULE-scan") == 0 or die "Scan failed\n";

unlink "./$MODULE-scan.c", "./$MODULE-scan";


&UpdateFileIfChanged ($old_signals_filename, $new_signals_filename, 0);
&UpdateFileIfChanged ($old_hierarchy_filename, $new_hierarchy_filename, 0);
&UpdateFileIfChanged ($old_args_filename, $new_args_filename, 0);

