/* -*-c-*- -------------- mixgtk_mixvm.c :
 * Implementation of the functions declared in mixgtk_mixvm.h
 * ------------------------------------------------------------------
 * $Id: mixgtk_mixvm.c,v 1.10 2002/04/10 23:39:40 jao Exp $
 * ------------------------------------------------------------------
 * Copyright (C) 2001, 2002 Free Software Foundation, Inc.
 *  
 * 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.
 *  
 */

#include <stdlib.h>
#include <mixlib/xmix_vm.h>
#include "mixgtk_widgets.h"
#include "mixgtk_mixvm.h"
#include "mixgtk_cmd_dispatcher.h"
#include "mixgtk_input.h"

/* register widgets */
#define REGISTER_NO_ (MIXGTK_WIDGET_rI6 - MIXGTK_WIDGET_rA + 1)

static GtkEntry *reg_entries_[REGISTER_NO_];
static GtkTooltips *tips_ = NULL;
static GtkEntry *loc_entry_;
static GtkWidget *goto_ = NULL;
static GtkEntry *goto_entry_ = NULL;
static GtkToggleButton *over_button_;
static GtkToggleButton *cmp_buttons_[3];
static GtkCList *memory_;
static GtkLabel *laptime_;
static GtkLabel *progtime_;
static GtkLabel *uptime_;
static mix_vm_t *vm_;

#define GOTO_ENTRY_NAME_ "goto_entry"

static void
init_goto_ (void)
{
  goto_ = mixgtk_widget_factory_get_dialog (MIXGTK_GOTO_DIALOG);
  g_assert (goto_ != NULL);
  goto_entry_ = GTK_ENTRY (mixgtk_widget_factory_get_child_by_name (
			   MIXGTK_GOTO_DIALOG, GOTO_ENTRY_NAME_));
  g_assert (goto_entry_ != NULL);
}

static void
update_register_ (mixgtk_widget_id_t reg)
{
  static gchar BUFFER[20];
  mix_word_t tipval = MIX_WORD_ZERO;
  switch (reg)
    {
    case MIXGTK_WIDGET_rA:
      tipval = mix_vm_get_rA (vm_);
      mix_word_print_to_buffer (tipval, BUFFER);
      break;
    case MIXGTK_WIDGET_rX:
      tipval = mix_vm_get_rX (vm_);
      mix_word_print_to_buffer (tipval, BUFFER);
      break;
    case MIXGTK_WIDGET_rJ:
      tipval = mix_short_to_word_fast (mix_vm_get_rJ (vm_));
      mix_short_print_to_buffer (mix_vm_get_rJ (vm_), BUFFER);
      break;
    case MIXGTK_WIDGET_rI1:
    case MIXGTK_WIDGET_rI2:
    case MIXGTK_WIDGET_rI3:
    case MIXGTK_WIDGET_rI4:
    case MIXGTK_WIDGET_rI5:
    case MIXGTK_WIDGET_rI6:
      {
	gint k = reg - MIXGTK_WIDGET_rI1 + 1;
	tipval = mix_short_to_word_fast (mix_vm_get_rI (vm_, k));
	mix_short_print_to_buffer (mix_vm_get_rI (vm_, k), BUFFER);
      }
      break;
    default:
      g_assert_not_reached ();
    }
  gtk_entry_set_text (reg_entries_[reg - MIXGTK_WIDGET_rA], BUFFER);
  g_snprintf (BUFFER, 20, "%s%ld", mix_word_is_negative (tipval)? "-" : "",
	    mix_word_magnitude (tipval));
  gtk_tooltips_set_tip (tips_,
			GTK_WIDGET (reg_entries_[reg - MIXGTK_WIDGET_rA]),
			BUFFER, NULL);

}


static void
on_mem_adj_change_ (GtkAdjustment *adj)
{
  mixgtk_mixvm_update_cells ();
}


/* initialise the mixvm widgets */
gboolean
mixgtk_mixvm_init (mix_vm_t *vm, mixgtk_dialog_id_t top)
{
  int k;
  gchar *text[] = {"", ""};
  GtkWidget *scrol;
  GtkAdjustment *adj;
  
  g_return_val_if_fail (vm != NULL, FALSE);
  vm_ = vm;

  if (!tips_) tips_ = gtk_tooltips_new ();

  for (k = 0; k < REGISTER_NO_; ++k)
    {
      reg_entries_[k] =
	GTK_ENTRY (mixgtk_widget_factory_get (top, MIXGTK_WIDGET_rA + k));
      g_return_val_if_fail (reg_entries_[k] != NULL, FALSE);
    }

  loc_entry_ = GTK_ENTRY (mixgtk_widget_factory_get (top, MIXGTK_WIDGET_LOC));
  g_return_val_if_fail (loc_entry_ != NULL, FALSE);

  uptime_ = GTK_LABEL (mixgtk_widget_factory_get (top, MIXGTK_WIDGET_UPTIME));
  g_return_val_if_fail (uptime_ != NULL, FALSE);

  progtime_ =
    GTK_LABEL (mixgtk_widget_factory_get (top, MIXGTK_WIDGET_PROGTIME));
  g_return_val_if_fail (progtime_ != NULL, FALSE);

  laptime_ = GTK_LABEL (mixgtk_widget_factory_get (top, MIXGTK_WIDGET_LAPTIME));
  g_return_val_if_fail (laptime_ != NULL, FALSE);

  over_button_ =
    GTK_TOGGLE_BUTTON (mixgtk_widget_factory_get (top, MIXGTK_WIDGET_OVER));
  g_return_val_if_fail (over_button_ != NULL, FALSE);

  for (k = 0; k < 3; ++k)
    {
      cmp_buttons_[k] =	GTK_TOGGLE_BUTTON
	(mixgtk_widget_factory_get (top, MIXGTK_WIDGET_CMP_L +k));
      g_return_val_if_fail (cmp_buttons_[k] != NULL, FALSE);
    }

  memory_ = GTK_CLIST (mixgtk_widget_factory_get (top, MIXGTK_WIDGET_CELLS));
  g_return_val_if_fail (memory_ != NULL, FALSE);
  gtk_clist_set_column_justification (memory_, 0, GTK_JUSTIFY_CENTER);
  gtk_clist_set_column_justification (memory_, 1, GTK_JUSTIFY_CENTER);
  gtk_clist_freeze (memory_);
  for (k = 0; k< MIX_VM_CELL_NO; ++k)
    {
      gchar buffer[20];
      g_snprintf (buffer, 20, "%04d", k);
      text[0] = buffer;
      gtk_clist_append (memory_, text);
    }
  gtk_clist_thaw (memory_);

  scrol = mixgtk_widget_factory_get (top, MIXGTK_WIDGET_CELLS_SCROLL);
  g_return_val_if_fail (scrol != NULL, FALSE);
  adj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (scrol));
  gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
		      GTK_SIGNAL_FUNC (on_mem_adj_change_), NULL);
  
  goto_ = NULL;
  
  return TRUE;
}


/* update register widgets */
void
mixgtk_mixvm_update_registers (void)
{
  gint k;
  for (k = MIXGTK_WIDGET_rA; k <= MIXGTK_WIDGET_rI6; ++k)
    update_register_ (k);
}

/* update the overflow toggle */
void
mixgtk_mixvm_update_over_toggle (void)
{
  g_assert (over_button_);
  gtk_toggle_button_set_active (over_button_,
				mix_vm_get_overflow (vm_));
}

/* update the comparison flag */
void
mixgtk_mixvm_update_cmp (void)
{
  gint toggle;
  
  g_assert (cmp_buttons_);
  
  toggle = mix_vm_get_cmpflag (vm_);
  gtk_toggle_button_set_active (cmp_buttons_[toggle], TRUE);
}


/* update the memory cells */
void
mixgtk_mixvm_update_cells (void)
{
  static gchar BUFFER[20];
  gint k = 0;
  
  g_assert (memory_);
  
  gtk_clist_freeze (memory_);
  
  while (gtk_clist_row_is_visible (memory_, k) == GTK_VISIBILITY_NONE) ++k;
  while (gtk_clist_row_is_visible (memory_, k) != GTK_VISIBILITY_NONE)
    {
      mix_word_print_to_buffer (mix_vm_get_addr_contents (vm_, k), BUFFER);
      gtk_clist_set_text (memory_, k, 1, BUFFER);
      ++k;
    }
  
  gtk_clist_thaw (memory_);
}

void
mixgtk_mixvm_update_cells_to_address (gint address)
{
  g_assert (memory_);
  if (address >= MIX_VM_CELL_NO) return;
  
  gtk_clist_freeze (memory_);
  gtk_clist_moveto (memory_, address, 0, 0, 0);
  gtk_clist_thaw (memory_);
  mixgtk_mixvm_update_cells ();
}

/* update the loc pointer */
void
mixgtk_mixvm_update_loc (void)
{
  enum {SIZE = 10 };
  static gchar BUFFER[SIZE];
  mix_short_t locval;
  
  g_assert (loc_entry_);
  
  locval = mix_vm_get_prog_count (vm_);
  g_snprintf (BUFFER, SIZE, "%04d", mix_short_magnitude (locval));
  gtk_entry_set_text (loc_entry_, BUFFER);
}

/* update times */
void
mixgtk_mixvm_update_times (void)
{
  enum {SIZE = 20 };
  static gchar BUFFER[SIZE];
  gint uptime, progtime, laptime;
  
  g_assert (uptime_ && progtime_ && laptime_);
  mixgtk_cmd_dispatcher_get_times (&uptime, &progtime, &laptime);
  g_snprintf (BUFFER, SIZE, "%d", uptime);
  gtk_label_set_text (uptime_, BUFFER);
  g_snprintf (BUFFER, SIZE, "%d", progtime);
  gtk_label_set_text (progtime_, BUFFER);
  g_snprintf (BUFFER, SIZE, "%d", laptime);
  gtk_label_set_text (laptime_, BUFFER);
}


/* update all mixvm widgets */
void
mixgtk_mixvm_update_vm_widgets (void)
{
  mixgtk_mixvm_update_registers ();
  mixgtk_mixvm_update_loc ();
  mixgtk_mixvm_update_over_toggle ();
  mixgtk_mixvm_update_cmp ();
  mixgtk_mixvm_update_cells ();
  mixgtk_mixvm_update_times ();
}


/* update cmp flag */
void
on_cmp_e_toggled (GtkWidget *widget, gpointer data)
{
  if (GTK_TOGGLE_BUTTON (widget)->active)
    mix_vm_set_cmpflag (vm_, mix_EQ);
}

void
on_cmp_l_toggled (GtkWidget *widget, gpointer data)
{
  if (GTK_TOGGLE_BUTTON (widget)->active)
    mix_vm_set_cmpflag (vm_, mix_LESS);
}

void
on_cmp_g_toggled (GtkWidget *widget, gpointer data)
{
  if (GTK_TOGGLE_BUTTON (widget)->active)
    mix_vm_set_cmpflag (vm_, mix_GREAT);
}

void
on_overflow_toggled (GtkWidget *widget, gpointer data)
{
  mix_vm_set_overflow (vm_, GTK_TOGGLE_BUTTON (widget)->active);
}


void
on_loc_arrow_clicked (GtkWidget *widget, gpointer data) 
{
  gint address = mix_short_magnitude (mix_vm_get_prog_count (vm_));
  mixgtk_mixvm_update_cells_to_address (address);
}


static void
register_AX_ (mix_word_t w, gpointer reg)
{
  gint k = GPOINTER_TO_INT (reg);
  if (k == 0)
    mix_vm_set_rA (vm_, w);
  else
    mix_vm_set_rX (vm_, w);
  update_register_ (MIXGTK_WIDGET_rA + k);
}

static void
register_j_ (mix_word_t w, gpointer data)
{
  if (mix_word_is_negative (w)) mix_word_reverse_sign (w);
  mix_vm_set_rJ (vm_, mix_word_to_short_fast (w));
  update_register_ (MIXGTK_WIDGET_rJ);
}

static void
register_i_ (mix_word_t w, gpointer reg)
{
  mix_vm_set_rI (vm_, GPOINTER_TO_INT (reg), mix_word_to_short_fast (w));
  update_register_ (MIXGTK_WIDGET_rI1 - 1 + GPOINTER_TO_INT (reg));
}

gboolean
on_register_click (GtkWidget *w, GdkEvent *e, gpointer data)
{
  enum {SIZE = 20};
  static gchar BUFFER[SIZE];
  gint k;
  
  if (w == GTK_WIDGET (reg_entries_[0]))
    mixgtk_input_word (_("Register A"), mix_vm_get_rA (vm_),
		       register_AX_, GINT_TO_POINTER (0));
  else if (w == GTK_WIDGET (reg_entries_[1]))
    mixgtk_input_word (_("Register X"), mix_vm_get_rX (vm_),
		       register_AX_, GINT_TO_POINTER(1));
  else if (w == GTK_WIDGET (reg_entries_[2]))
    mixgtk_input_short (_("Register J"), mix_vm_get_rJ (vm_),
			register_j_, NULL);
  else for (k = 1; k < 7; ++k)
    {
      if (w == GTK_WIDGET (reg_entries_[2 + k]))
	{
	  g_snprintf (BUFFER, SIZE, _("Register I%d"), k);
	  mixgtk_input_short (BUFFER, mix_vm_get_rI (vm_, k),
			      register_i_, GINT_TO_POINTER (k));
	  break;
	}
    }
  return FALSE;
}

static void
mem_cell_ (mix_word_t w, gpointer a)
{
  mix_short_t addr = mix_short_new (GPOINTER_TO_INT (a));
  mix_vm_set_addr_contents (vm_, addr, w);
  mixgtk_mixvm_update_cells ();
}

void
on_memory_cells_select_row (GtkCList *w, gint row, gint col,
			    GdkEvent *e, gpointer data)
{
  enum {SIZE = 30};
  static gchar BUFFER[SIZE];
  g_snprintf (BUFFER, SIZE, _("Memory cell no. %d"), row);
  mixgtk_input_word (BUFFER,
		     mix_vm_get_addr_contents (vm_, mix_short_new (row)),
		     mem_cell_, GINT_TO_POINTER (row));
}

void
on_memory_cells_click_column (GtkCList *w, gint row, gpointer data)
{
  if (!goto_) init_goto_ ();
  gtk_widget_show (goto_);
}

void
on_goto_cancel_clicked (GtkWidget *w, gpointer data)
{
  gtk_widget_hide (goto_);
}

void
on_goto_ok_clicked (GtkWidget *w, gpointer data)
{
  gchar *txt = gtk_entry_get_text (goto_entry_);
  mix_short_t addr = mix_short_new (atoi (txt));
  if (addr < MIX_VM_CELL_NO)
    {
      gtk_widget_hide (goto_);
      mixgtk_mixvm_update_cells_to_address (addr);
    }
}