/* 
 *	Copyright (C) 2004-2005 Vadim Berezniker
 *	http://www.kryptolus.com
 *
 *  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, 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 GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

#include "stdafx.h"

#include "common.h"

#include "sabbu.h"
#include "gui_main_navigation.h"
#include "gui_main_event.h"
#include "gui_event_list.h"

extern struct sabbu app;

void gui_main_menu_navigation_next_row(gpointer callback_data, guint callback_action, GtkWidget *menu_item)
{
  GtkTreeIter iter;
  gui_main_event_current_save_text();
  gui_main_event_select(1, &iter, FALSE, FALSE);
}

void gui_main_menu_navigation_previous_row(gpointer callback_data, guint callback_action, GtkWidget *menu_item)
{
  GtkTreeIter iter;
  gui_main_event_current_save_text();
  gui_main_event_select(-1, &iter, FALSE, FALSE);
}

void gui_main_menu_navigation_page_up(gpointer callback_data, guint callback_action, GtkWidget *menu_item)
{
  GtkAdjustment *adjustment = gtk_tree_view_get_vadjustment(gui_event_list_get_view(app.ui.event_list));
  GtkTreeIter iter;
  GtkTreeModel *model;
  GtkTreeSelection *selection = gui_event_list_get_selection(app.ui.event_list);
  GList *children = gtk_tree_selection_get_selected_rows(selection, &model);
  GdkRectangle rectangle;
  GtkTreePath *path;
  int x,y;
  if(!adjustment || !children)
  {
    g_list_foreach (children, (GFunc) gtk_tree_path_free, NULL);
    g_list_free(children);
    return;
  }

  gui_main_event_current_save_text();

  adjustment->value -= adjustment->page_increment;
  if(adjustment->value < 0)
    adjustment->value = 0;

  gtk_adjustment_value_changed(adjustment);

  if(adjustment->value == 0)
  {
    gui_main_menu_navigation_top(callback_data, callback_action, menu_item);
    g_list_foreach (children, (GFunc) gtk_tree_path_free, NULL);
    g_list_free(children);
    return;
  }

  gtk_tree_view_get_visible_rect(gui_event_list_get_view(app.ui.event_list), &rectangle);
  gtk_tree_view_tree_to_widget_coords(gui_event_list_get_view(app.ui.event_list), rectangle.x, rectangle.y, &x, &y);
  y += 50;
  gtk_tree_view_get_path_at_pos(gui_event_list_get_view(app.ui.event_list), x, y, &path, NULL, NULL, NULL);
  gtk_tree_view_scroll_to_cell(gui_event_list_get_view(app.ui.event_list), path, NULL, FALSE, 0, 0);
  gtk_tree_model_get_iter(model, &iter, path);

  gtk_tree_selection_unselect_all(selection);
  gtk_tree_selection_select_iter(selection, &iter);

  gtk_tree_path_free(path);
  g_list_foreach (children, (GFunc) gtk_tree_path_free, NULL);
  g_list_free(children);
}

void gui_main_menu_navigation_page_down(gpointer callback_data, guint callback_action, GtkWidget *menu_item)
{
  GtkAdjustment *adjustment = gtk_tree_view_get_vadjustment(gui_event_list_get_view(app.ui.event_list));
  GtkTreeIter iter;
  GtkTreeModel *model;
  GtkTreeSelection *selection = gui_event_list_get_selection(app.ui.event_list);
  GList *children = gtk_tree_selection_get_selected_rows(selection, &model);
  GdkRectangle rectangle;
  GtkTreePath *path;
  kryEvent *line;
  int x,y;
  if(!adjustment || !children)
  {
    g_list_foreach (children, (GFunc) gtk_tree_path_free, NULL);
    g_list_free(children);
    return;
  }

  gui_main_event_current_save_text();

  adjustment->value += adjustment->page_increment;
  if(adjustment->value > adjustment->upper - adjustment->page_size)
    adjustment->value = adjustment->upper - adjustment->page_size;

  gtk_adjustment_value_changed(adjustment);

  gtk_tree_view_get_visible_rect(gui_event_list_get_view(app.ui.event_list), &rectangle);
  gtk_tree_view_tree_to_widget_coords(gui_event_list_get_view(app.ui.event_list), rectangle.x, rectangle.y, &x, &y);
  y += 50;
  gtk_tree_view_get_path_at_pos(gui_event_list_get_view(app.ui.event_list), x, y, &path, NULL, NULL, NULL);
  gtk_tree_model_get_iter(model, &iter, path);

  while(1)
  {
    gtk_tree_model_get(model, &iter,
      PTR_COLUMN, &line, -1);
    
    if(line->GetType() != kryEvent::EVENT_BLANK)
      break;

    if(!gtk_tree_path_prev(path))
      break;

    gtk_tree_model_get_iter(model, &iter, path);
  }
  gtk_tree_view_scroll_to_cell(gui_event_list_get_view(app.ui.event_list), path, NULL, FALSE, 0, 0);

  gtk_tree_selection_unselect_all(selection);
  gtk_tree_selection_select_iter(selection, &iter);

  gtk_tree_path_free(path);
  g_list_foreach (children, (GFunc) gtk_tree_path_free, NULL);
  g_list_free(children);
}

void gui_main_menu_navigation_top(gpointer callback_data, guint callback_action, GtkWidget *menu_item)
{
  GtkTreeSelection *selection = gui_event_list_get_selection(app.ui.event_list);
  GtkTreePath *path = gtk_tree_path_new_from_string("0");
  GtkTreeIter iter;

  gui_main_event_current_save_text();

  gtk_tree_model_get_iter(GTK_TREE_MODEL(gui_event_list_get_store(app.ui.event_list)), &iter, path);

  gtk_tree_selection_unselect_all(selection);
  gtk_tree_selection_select_iter(selection, &iter);

  gtk_tree_view_scroll_to_cell(gui_event_list_get_view(app.ui.event_list), path, NULL, FALSE, 0, 0);

  gtk_tree_path_free(path);
}

void gui_main_menu_navigation_bottom(gpointer callback_data, guint callback_action, GtkWidget *menu_item)
{
  GtkTreeSelection *selection = gui_event_list_get_selection(app.ui.event_list);
  char *end;
  if(app.script->GetEventCount() - app.script->GetBlankCount() == 0)
    end = kry_strdup("0");
  else
    end = kry_strdup_printf(KRY_LOC "%d", app.script->GetEventCount() - app.script->GetBlankCount() - 1);


  GtkTreePath *path = gtk_tree_path_new_from_string(end);
  GtkTreeIter iter;

  gui_main_event_current_save_text();

  gtk_tree_model_get_iter(GTK_TREE_MODEL(gui_event_list_get_store(app.ui.event_list)), &iter, path);

  gtk_tree_selection_unselect_all(selection);
  gtk_tree_selection_select_iter(selection, &iter);

  gtk_tree_view_scroll_to_cell(gui_event_list_get_view(app.ui.event_list), path, NULL, TRUE, 0.5, 0.0);

  gtk_tree_path_free(path);
  kry_free(end);
}