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navit.c

/**
 * Navit, a modular navigation system.
 * Copyright (C) 2005-2008 Navit Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <glib.h>
#include <math.h>
#include <time.h>
#include "config.h"
#include "debug.h"
#include "navit.h"
#include "callback.h"
#include "gui.h"
#include "item.h"
#include "projection.h"
#include "map.h"
#include "mapset.h"
#include "main.h"
#include "coord.h"
#include "point.h"
#include "transform.h"
#include "param.h"
#include "menu.h"
#include "graphics.h"
#include "cursor.h"
#include "popup.h"
#include "data_window.h"
#include "route.h"
#include "navigation.h"
#include "speech.h"
#include "track.h"
#include "vehicle.h"
#include "color.h"
#include "layout.h"
#include "log.h"
#include "attr.h"
#include "event.h"
#include "file.h"
#include "profile.h"
#include "command.h"
#include "navit_nls.h"
#include "util.h"
#include "messages.h"
#include "vehicleprofile.h"

/**
 * @defgroup navit the navit core instance. navit is the object containing nearly everything: A set of maps, one or more vehicle, a graphics object for rendering the map, a gui object for displaying the user interface, a route object, a navigation object and so on. Be warned that it is theoretically possible to have more than one navit object
 * @{
 */

//! The navit_vehicule
00072 struct navit_vehicle {
      int follow;
      /*! Limit of the follow counter. See navit_add_vehicle */
00075       int follow_curr;
      /*! Deprecated : follow counter itself. When it reaches 'update' counts, map is recentered*/
00077       struct coord coord;
      int dir;
      int speed;
      struct coord last; /*< Position of the last update of this vehicle */
      struct color c;
      struct color *c2;
      struct cursor *cursor;
      struct vehicle *vehicle;
      struct attr callback;
      int animate_cursor;
};

struct navit {
      struct attr self;
      GList *mapsets;
      GList *layouts;
      struct gui *gui;
      struct layout *layout_current;
      struct graphics *gra;
      struct action *action;
      struct transformation *trans;
      struct compass *compass;
      struct route *route;
      struct navigation *navigation;
      struct speech *speech;
      struct tracking *tracking;
      int ready;
      struct window *win;
      struct displaylist *displaylist;
      int tracking_flag;
      int orientation;
      int recentdest_count;
      int osd_configuration;
      GList *vehicles;
      GList *windows_items;
      struct navit_vehicle *vehicle;
      struct callback_list *attr_cbl;
      struct callback *nav_speech_cb, *roadbook_callback, *popup_callback, *route_cb;
      struct datawindow *roadbook_window;
      struct map *bookmark;
      struct map *former_destination;
      GHashTable *bookmarks_hash;
      struct point pressed, last, current;
      int button_pressed,moved,popped,zoomed;
      int center_timeout;
      int autozoom_secs;
      int autozoom_min;
      int autozoom_active;
      struct event_timeout *button_timeout, *motion_timeout;
      struct callback *motion_timeout_callback;
      int ignore_button;
      int ignore_graphics_events;
      struct log *textfile_debug_log;
      struct pcoord destination;
      int destination_valid;
      int blocked;
      int w,h;
      int drag_bitmap;
      int use_mousewheel;
      struct messagelist *messages;
      struct callback *resize_callback,*button_callback,*motion_callback;
      struct vehicleprofile *vehicleprofile;
      GList *vehicleprofiles;
      int pitch;
};

00143 struct gui *main_loop_gui;

struct attr_iter {
      union {
            GList *list;
            struct mapset_handle *mapset_handle;
      } u;
};

static void navit_vehicle_update(struct navit *this_, struct navit_vehicle *nv);
static void navit_vehicle_draw(struct navit *this_, struct navit_vehicle *nv, struct point *pnt);
static int navit_add_vehicle(struct navit *this_, struct vehicle *v);
static int navit_set_attr_do(struct navit *this_, struct attr *attr, int init);
static int navit_get_cursor_pnt(struct navit *this_, struct point *p, int *dir);
static void navit_cmd_zoom_to_route(struct navit *this);
static void navit_cmd_set_center_cursor(struct navit *this_);
static void navit_set_vehicle(struct navit *this_, struct navit_vehicle *nv);

void
navit_add_mapset(struct navit *this_, struct mapset *ms)
{
      this_->mapsets = g_list_append(this_->mapsets, ms);
}

struct mapset *
navit_get_mapset(struct navit *this_)
{
      if(this_->mapsets){
            return this_->mapsets->data;
      } else {
            dbg(0,"No mapsets enabled! Is it on purpose? Navit can't draw a map. Please check your navit.xml\n");
      }
      return NULL;
}

struct tracking *
navit_get_tracking(struct navit *this_)
{
      return this_->tracking;
}

static void
navit_draw_async(struct navit *this_, int async)
{
      GList *l;
      struct navit_vehicle *nv;

      if (this_->blocked) {
            this_->blocked |= 2;
            return;
      }
      transform_setup_source_rect(this_->trans);
      l=this_->vehicles;
      while (l) {
            nv=l->data;
            navit_vehicle_draw(this_, nv, NULL);
            l=g_list_next(l);
      }
      graphics_draw(this_->gra, this_->displaylist, this_->mapsets->data, this_->trans, this_->layout_current, async, NULL);
}

void
navit_draw(struct navit *this_)
{
      navit_draw_async(this_, 0);
}


void
navit_draw_displaylist(struct navit *this_)
{
      if (this_->ready == 3)
            graphics_displaylist_draw(this_->gra, this_->displaylist, this_->trans, this_->layout_current, 1);
}

static void
navit_redraw_route(struct navit *this_, struct route *route, struct attr *attr)
{
      int updated;
      if (attr->type != attr_route_status)
            return;
      updated=attr->u.num;
      if (this_->ready != 3)
            return;
      if (updated != route_status_path_done_new)
            return;
      if (this_->vehicle) {
            if (this_->vehicle->follow_curr == 1)
                  return;
            if (this_->vehicle->follow_curr <= this_->vehicle->follow)
                  this_->vehicle->follow_curr=this_->vehicle->follow;
      }
      navit_draw(this_);
}

void
navit_handle_resize(struct navit *this_, int w, int h)
{
      struct map_selection sel;
      memset(&sel, 0, sizeof(sel));
      this_->w=w;
      this_->h=h;
      sel.u.p_rect.rl.x=w;
      sel.u.p_rect.rl.y=h;
      transform_set_screen_selection(this_->trans, &sel);
      this_->ready |= 2;
      graphics_set_rect(this_->gra, &sel.u.p_rect);
      if (this_->ready == 3)
            navit_draw(this_);
}

static void
navit_resize(void *data, int w, int h)
{
      struct navit *this=data;
      if (!this->ignore_graphics_events)
            navit_handle_resize(this, w, h);
}

int
navit_get_width(struct navit *this_)
{
      return this_->w;
}


int
navit_get_height(struct navit *this_)
{
      return this_->h;
}

static void
navit_popup(void *data)
{
      struct navit *this_=data;
      popup(this_, 1, &this_->pressed);
      this_->button_timeout=NULL;
      this_->popped=1;
}


int
navit_ignore_button(struct navit *this_)
{
      if (this_->ignore_button)
            return 1;
      this_->ignore_button=1;
      return 0;
}

void
navit_ignore_graphics_events(struct navit *this_, int ignore)
{
      this_->ignore_graphics_events=ignore;
}

static void
update_transformation(struct transformation *tr, struct point *old, struct point *new, struct point *rot)
{
      struct coord co,cn;
      struct coord c,*cp;
      int yaw;
      double angleo,anglen;

      transform_reverse(tr, old, &co);
      if (rot) {
            angleo=atan2(old->y-rot->y, old->x-rot->x)*180/M_PI;
            anglen=atan2(new->y-rot->y, new->x-rot->x)*180/M_PI;
            yaw=transform_get_yaw(tr)+angleo-anglen;
            transform_set_yaw(tr, yaw % 360);
      }
      transform_reverse(tr, new, &cn);
      cp=transform_get_center(tr);
      c.x=cp->x+co.x-cn.x;
      c.y=cp->y+co.y-cn.y;
      dbg(1,"from 0x%x,0x%x to 0x%x,0x%x\n", cp->x, cp->y, c.x, c.y);
      transform_set_center(tr, &c);
}

int
navit_handle_button(struct navit *this_, int pressed, int button, struct point *p, struct callback *popup_callback)
{
      int border=16;

      callback_list_call_attr_4(this_->attr_cbl, attr_button, this_, (void *)pressed, (void *)button, p);
      if (this_->ignore_button) {
            this_->ignore_button=0;
            return 0;
      }
      if (pressed) {
            this_->pressed=*p;
            this_->last=*p;
            this_->zoomed=0;
            if (button == 1) {
                  this_->button_pressed=1;
                  this_->moved=0;
                  this_->popped=0;
                  if (popup_callback)
                        this_->button_timeout=event_add_timeout(500, 0, popup_callback);
            }
            if (button == 2)
                  navit_set_center_screen(this_, p);
            if (button == 3)
                  popup(this_, button, p);
            if (button == 4 && this_->use_mousewheel) {
                  this_->zoomed = 1;
                  navit_zoom_in(this_, 2, p);
            }
            if (button == 5 && this_->use_mousewheel) {
                  this_->zoomed = 1;
                  navit_zoom_out(this_, 2, p);
            }
      } else {
            struct attr follow;
            follow.type=attr_follow;
            follow.u.num=this_->center_timeout;

            this_->button_pressed=0;
            if (this_->button_timeout) {
                  event_remove_timeout(this_->button_timeout);
                  this_->button_timeout=NULL;
                  if (! this_->moved && ! transform_within_border(this_->trans, p, border)) {
                        if (!this_->zoomed) 
                              navit_set_attr(this_, &follow);
                        navit_set_center_screen(this_, p);
                  }
            }
            if (this_->motion_timeout) {
                  event_remove_timeout(this_->motion_timeout);
                  this_->motion_timeout=NULL;
            }
            if (this_->moved) {
                  struct point pr;
                  pr.x=this_->w/2;
                  pr.y=this_->h;
#if 0
                  update_transformation(this_->trans, &this_->pressed, p, &pr);
#else
                  update_transformation(this_->trans, &this_->pressed, p, NULL);
#endif
                  graphics_draw_drag(this_->gra, NULL);
                  graphics_overlay_disable(this_->gra, 0);
                  if (!this_->zoomed) 
                        navit_set_attr(this_, &follow);
                  navit_draw(this_);
            } else
                  return 1;
      }
      return 0;
}

static void
navit_button(void *data, int pressed, int button, struct point *p)
{
      struct navit *this=data;
      if (!this->ignore_graphics_events) {
            if (! this->popup_callback)
                  this->popup_callback=callback_new_1(callback_cast(navit_popup), this);
            navit_handle_button(this, pressed, button, p, this->popup_callback);
      }
}


static void
navit_motion_timeout(struct navit *this_)
{
      int dx, dy;

      if (this_->drag_bitmap) {
            struct point point;
            point.x=(this_->current.x-this_->pressed.x);
            point.y=(this_->current.y-this_->pressed.y);
            if (graphics_draw_drag(this_->gra, &point)) {
                  graphics_overlay_disable(this_->gra, 1);
                  graphics_draw_mode(this_->gra, draw_mode_end);
                  this_->moved=1;
                  this_->motion_timeout=NULL;
                  return;
            }
      } 
      dx=(this_->current.x-this_->last.x);
      dy=(this_->current.y-this_->last.y);
      if (dx || dy) {
            struct transformation *tr;
            struct point pr;
            this_->last=this_->current;
            graphics_overlay_disable(this_->gra, 1);
            tr=transform_dup(this_->trans);
            pr.x=this_->w/2;
            pr.y=this_->h;
#if 0
            update_transformation(tr, &this_->pressed, &this_->current, &pr);
#else
            update_transformation(tr, &this_->pressed, &this_->current, NULL);
#endif
#if 0
            graphics_displaylist_move(this_->displaylist, dx, dy);
#endif
            graphics_draw_cancel(this_->gra, this_->displaylist);
            graphics_displaylist_draw(this_->gra, this_->displaylist, tr, this_->layout_current, 0);
            transform_destroy(tr);
            this_->moved=1;
      }
      this_->motion_timeout=NULL;
      return;
}

void
navit_handle_motion(struct navit *this_, struct point *p)
{
      int dx, dy;

      if (this_->button_pressed && !this_->popped) {
            dx=(p->x-this_->pressed.x);
            dy=(p->y-this_->pressed.y);
            if (dx < -8 || dx > 8 || dy < -8 || dy > 8) {
                  if (this_->button_timeout) {
                        event_remove_timeout(this_->button_timeout);
                        this_->button_timeout=NULL;
                  }
                  this_->current=*p;
                  if (! this_->motion_timeout_callback)
                        this_->motion_timeout_callback=callback_new_1(callback_cast(navit_motion_timeout), this_);
                  if (! this_->motion_timeout)
                        this_->motion_timeout=event_add_timeout(100, 0, this_->motion_timeout_callback);
            }
      }
}

static void
navit_motion(void *data, struct point *p)
{
      struct navit *this=data;
      if (!this->ignore_graphics_events) 
            navit_handle_motion(this, p);
}

static void
navit_scale(struct navit *this_, long scale, struct point *p, int draw)
{
      struct coord c1, c2, *center;
      if (p)
            transform_reverse(this_->trans, p, &c1);
      transform_set_scale(this_->trans, scale);
      if (p) {
            transform_reverse(this_->trans, p, &c2);
            center = transform_center(this_->trans);
            center->x += c1.x - c2.x;
            center->y += c1.y - c2.y;
      }
      if (draw)
            navit_draw(this_);
}

/**
 * @brief Automatically adjusts zoom level
 *
 * This function automatically adjusts the current
 * zoom level according to the current speed.
 *
 * @param this_ The navit struct
 * @param center The "immovable" point - i.e. the vehicles position if we're centering on the vehicle
 * @param speed The vehicles speed in meters per second
 * @param dir The direction into which the vehicle moves
 */
static void
00510 navit_autozoom(struct navit *this_, struct coord *center, int speed, int draw)
{
      struct point pc;
      int distance,w,h;
      double new_scale;
      long scale;

      if (! this_->autozoom_active) {
            return;
      }

      distance = speed * this_->autozoom_secs;

      transform_get_size(this_->trans, &w, &h);
      transform(this_->trans, transform_get_projection(this_->trans), center, &pc, 1, 0, 0, NULL);
      scale = transform_get_scale(this_->trans);

      /* We make shure that the point we want to see is within a certain range
       * around the vehicle. The radius of this circle is the size of the
       * screen. This doesn't necessarily mean the point is visible because of
       * perspective etc. Quite rough, but should be enough. */
      
      if (w > h) {
            new_scale = (double)distance / h * 16; 
      } else {
            new_scale = (double)distance / w * 16; 
      }

      if (abs(new_scale - scale) < 2) { 
            return; // Smoothing
      }
      
      if (new_scale >= this_->autozoom_min) {
            navit_scale(this_, (long)new_scale, &pc, 0);
      } else {
            if (scale != this_->autozoom_min) {
                  navit_scale(this_, this_->autozoom_min, &pc, 0);
            }
      }
}

/**
 * Change the current zoom level, zooming closer to the ground
 *
 * @param navit The navit instance
 * @param factor The zoom factor, usually 2
 * @param p The invariant point (if set to NULL, default to center)
 * @returns nothing
 */
void
00560 navit_zoom_in(struct navit *this_, int factor, struct point *p)
{
      long scale=transform_get_scale(this_->trans)/factor;
      if (scale < 1)
            scale=1;
      navit_scale(this_, scale, p, 1);
}

/**
 * Change the current zoom level
 *
 * @param navit The navit instance
 * @param factor The zoom factor, usually 2
 * @param p The invariant point (if set to NULL, default to center)
 * @returns nothing
 */
void
00577 navit_zoom_out(struct navit *this_, int factor, struct point *p)
{
      long scale=transform_get_scale(this_->trans)*factor;
      navit_scale(this_, scale, p, 1);
}

static int
navit_cmd_zoom_in(struct navit *this_)
{
      struct point p;
      if (this_->vehicle && this_->vehicle->follow_curr == 1 && navit_get_cursor_pnt(this_, &p, NULL)) {
            navit_zoom_in(this_, 2, &p);
            this_->vehicle->follow_curr=this_->vehicle->follow;
      } else
            navit_zoom_in(this_, 2, NULL);
      return 0;
}

static int
navit_cmd_zoom_out(struct navit *this_)
{
      struct point p;
      if (this_->vehicle && this_->vehicle->follow_curr == 1 && navit_get_cursor_pnt(this_, &p, NULL)) {
            navit_zoom_out(this_, 2, &p);
            this_->vehicle->follow_curr=this_->vehicle->follow;
      } else
            navit_zoom_out(this_, 2, NULL);
      return 0;
}

static struct command_table commands[] = {
      {"zoom_in",command_cast(navit_cmd_zoom_in)},
      {"zoom_out",command_cast(navit_cmd_zoom_out)},
      {"zoom_to_route",command_cast(navit_cmd_zoom_to_route)},
      {"set_center_cursor",command_cast(navit_cmd_set_center_cursor)},
};
      

struct navit *
navit_new(struct attr *parent, struct attr **attrs)
{
      struct navit *this_=g_new0(struct navit, 1);
      struct pcoord center;
      struct coord co;
      struct coord_geo g;
      enum projection pro=projection_mg;
      int zoom = 256;
      g.lat=53.13;
      g.lng=11.70;

      this_->self.type=attr_navit;
      this_->self.u.navit=this_;
      this_->attr_cbl=callback_list_new();
      main_add_navit(this_);

      this_->bookmarks_hash=g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);

      this_->orientation=-1;
      this_->tracking_flag=1;
      this_->recentdest_count=10;
      this_->osd_configuration=-1;

      this_->center_timeout = 10;
      this_->use_mousewheel = 1;
      this_->autozoom_secs = 10;
      this_->autozoom_min = 7;
      this_->autozoom_active = 0;

      this_->trans = transform_new();
      transform_from_geo(pro, &g, &co);
      center.x=co.x;
      center.y=co.y;
      center.pro = pro;

      transform_setup(this_->trans, &center, zoom, (this_->orientation != -1) ? this_->orientation : 0);
      for (;*attrs; attrs++) {
            navit_set_attr_do(this_, *attrs, 1);
      }
      this_->displaylist=graphics_displaylist_new();
      command_add_table(this_->attr_cbl, commands, sizeof(commands)/sizeof(struct command_table), this_);

      this_->messages = messagelist_new(attrs);
      
      return this_;
}

static int
navit_set_gui(struct navit *this_, struct gui *gui)
{
      if (this_->gui)
            return 0;
      this_->gui=gui;
      if (gui_has_main_loop(this_->gui)) {
            if (! main_loop_gui) {
                  main_loop_gui=this_->gui;
            } else {
                  dbg(0,"gui with main loop already active, ignoring this instance");
                  return 0;
            }
      }
      return 1;
}

void 
navit_add_message(struct navit *this_, char *message)
{
      message_new(this_->messages, message);
}

struct message
*navit_get_messages(struct navit *this_)
{
      return message_get(this_->messages);
}

static int
navit_set_graphics(struct navit *this_, struct graphics *gra)
{
      if (this_->gra)
            return 0;
      this_->gra=gra;
      this_->resize_callback=callback_new_attr_1(callback_cast(navit_resize), attr_resize, this_);
      graphics_add_callback(gra, this_->resize_callback);
      this_->button_callback=callback_new_attr_1(callback_cast(navit_button), attr_button, this_);
      graphics_add_callback(gra, this_->button_callback);
      this_->motion_callback=callback_new_attr_1(callback_cast(navit_motion), attr_motion, this_);
      graphics_add_callback(gra, this_->motion_callback);
      return 1;
}

struct graphics *
navit_get_graphics(struct navit *this_)
{
      return this_->gra;
}

struct vehicleprofile *
navit_get_vehicleprofile(struct navit *this_)
{
      return this_->vehicleprofile;
}

static void
navit_projection_set(struct navit *this_, enum projection pro)
{
      struct coord_geo g;
      struct coord *c;

      c=transform_center(this_->trans);
      transform_to_geo(transform_get_projection(this_->trans), c, &g);
      transform_set_projection(this_->trans, pro);
      transform_from_geo(pro, &g, c);
      navit_draw(this_);
}

/**
 * @param limit Limits the number of entries in the "backlog". Set to 0 for "infinite"
 */
static void
00736 navit_append_coord(struct navit *this_, char *file, struct pcoord *c, const char *type, const char *description, GHashTable *h, int limit)
{
      FILE *f;
      int offset=0;
      char *buffer;
      int ch,prev,lines=0;
      int numc,readc;
      int fd;
      const char *prostr;

      f=fopen(file, "r");
      if (!f)
            goto new_file;
      if (limit != 0) {
            prev = '\n';
            while ((ch = fgetc(f)) != EOF) {
                  if ((ch == '\n') && (prev != '\n')) {
                        lines++;
                  }
                  prev = ch;
            }

            if (prev != '\n') { // Last line did not end with a newline
                  lines++;
            }

            fclose(f);
            f = fopen(file, "r+");
            fd = fileno(f);
            while (lines >= limit) { // We have to "scroll up"
                  rewind(f);
                  numc = 0; // Counts how many bytes we have in our line to scroll up
                  while ((ch = fgetc(f)) != EOF) {
                        numc++;
                        if (ch == '\n') {
                              break;
                        }
                  }

                  buffer=g_malloc(numc);
                  offset = numc; // Offset holds where we currently are
                  
                  do {
                        fseek(f,offset,SEEK_SET);
                        readc = fread(buffer,1,numc,f);
                        
                        fseek(f,-(numc+readc),SEEK_CUR);
                        fwrite(buffer,1,readc,f);

                        offset += readc;
                  } while (readc == numc);

                  g_free(buffer);
                  fflush(f);
                  ftruncate(fd,(offset-numc));
#ifdef HAVE_FSYNC
                  fsync(fd);
#endif

                  lines--;
            }
            fclose(f);
      }

new_file:
      f=fopen(file, "a");
      if (f) {
            if (c) {
                  prostr = projection_to_name(c->pro,NULL);
                  fprintf(f,"%s%s%s0x%x %s0x%x type=%s label=\"%s\"\n",
                         prostr, *prostr ? ":" : "", 
                         c->x >= 0 ? "":"-", c->x >= 0 ? c->x : -c->x, 
                         c->y >= 0 ? "":"-", c->y >= 0 ? c->y : -c->y, 
                         type, description);
            } else
                  fprintf(f,"\n");
      }
      fclose(f);
}

/*
 * navit_get_user_data_directory
 * 
 * returns the directory used to store user data files (center.txt,
 * destination.txt, bookmark.txt, ...)
 *
 * arg: gboolean create: create the directory if it does not exist
 */
static char*
navit_get_user_data_directory(gboolean create) {
      char *dir;
      dir = getenv("NAVIT_USER_DATADIR");
      if (create && !file_exists(dir)) {
            dbg(0,"creating dir %s\n", dir);
            if (file_mkdir(dir,0)) {
                  dbg(0,"failed creating dir %s\n", dir);
                  return NULL;
            }
      }

      return dir;
}

/*
 * navit_get_destination_file
 * 
 * returns the name of the file used to store destinations with its
 * full path
 *
 * arg: gboolean create: create the directory where the file is stored
 * if it does not exist
 */
static char*
navit_get_destination_file(gboolean create)
{
      return g_strjoin(NULL, navit_get_user_data_directory(create), "/destination.txt", NULL);
}

/*
 * navit_get_bookmark_file
 * 
 * returns the name of the file used to store bookmarks with its
 * full path
 *
 * arg: gboolean create: create the directory where the file is stored
 * if it does not exist
 */
static char*
navit_get_bookmark_file(gboolean create)
{
      return g_strjoin(NULL, navit_get_user_data_directory(create), "/bookmark.txt", NULL);
}


/*
 * navit_get_bookmark_file
 * 
 * returns the name of the file used to store the center file  with its
 * full path
 *
 * arg: gboolean create: create the directory where the file is stored
 * if it does not exist
 */
static char*
navit_get_center_file(gboolean create)
{
      return g_strjoin(NULL, navit_get_user_data_directory(create), "/center.txt", NULL);
}

static void
navit_set_center_from_file(struct navit *this_, char *file)
{
      FILE *f;
      char *line = NULL;

      size_t line_size = 0;
      enum projection pro;
      struct coord *center;

      f = fopen(file, "r");
      if (! f)
            return;
      getline(&line, &line_size, f);
      fclose(f);
      if (line) {
            center = transform_center(this_->trans);
            pro = transform_get_projection(this_->trans);
            coord_parse(g_strchomp(line), pro, center);
            free(line);
      }
      return;
}
 
static void
navit_write_center_to_file(struct navit *this_, char *file)
{
      FILE *f;
      enum projection pro;
      struct coord *center;

      f = fopen(file, "w+");
      if (f) {
            center = transform_center(this_->trans);
            pro = transform_get_projection(this_->trans);
            coord_print(pro, center, f);
            fclose(f);
      } else {
            perror(file);
      }
      return;
}


/**
 * Start the route computing to a given set of coordinates
 *
 * @param navit The navit instance
 * @param c The coordinate to start routing to
 * @param description A label which allows the user to later identify this destination in the former destinations selection
 * @returns nothing
 */
void
00938 navit_set_destination(struct navit *this_, struct pcoord *c, const char *description, int async)
{
      if (c) {
            this_->destination=*c;
            this_->destination_valid=1;
      } else
            this_->destination_valid=0;
      char *destination_file = navit_get_destination_file(TRUE);
      navit_append_coord(this_, destination_file, c, "former_destination", description, NULL, this_->recentdest_count);
      g_free(destination_file);
      callback_list_call_attr_0(this_->attr_cbl, attr_destination);
      if (this_->route) {
            route_set_destination(this_->route, c, async);

            if (this_->ready == 3)
                  navit_draw(this_);
      }
}

/**
 * @brief Checks if a route is calculated
 *
 * This function checks if a route is calculated.
 *
 * @param this_ The navit struct whose route should be checked.
 * @return True if the route is set, false otherwise.
 */
int
00966 navit_check_route(struct navit *this_)
{
      if (this_->route) {
            return route_get_path_set(this_->route);
      }

      return 0;
}

/**
 * Record the given set of coordinates as a bookmark
 *
 * @param navit The navit instance
 * @param c The coordinate to store
 * @param description A label which allows the user to later identify this bookmark
 * @returns nothing
 */
void
00984 navit_add_bookmark(struct navit *this_, struct pcoord *c, const char *description)
{
      char *bookmark_file = navit_get_bookmark_file(TRUE);
      navit_append_coord(this_,bookmark_file, c, "bookmark", description, this_->bookmarks_hash,0);
      g_free(bookmark_file);

      callback_list_call_attr_0(this_->attr_cbl, attr_bookmark_map);
}

struct navit *global_navit;

static void
navit_add_bookmarks_from_file(struct navit *this_)
{
      char *bookmark_file = navit_get_bookmark_file(FALSE);
      struct attr parent={attr_navit, .u.navit=this_};
      struct attr type={attr_type, {"textfile"}}, data={attr_data, {bookmark_file}};
      struct attr *attrs[]={&type, &data, NULL};

      this_->bookmark=map_new(&parent, attrs);
      g_free(bookmark_file);
}

static int
navit_former_destinations_active(struct navit *this_)
{
      char *destination_file = navit_get_destination_file(FALSE);
      FILE *f;
      int active=0;
      char buffer[3];
      f=fopen(destination_file,"r");
      if (f) {
            if(!fseek(f, -2, SEEK_END) && fread(buffer, 2, 1, f) == 1 && (buffer[0]!='\n' || buffer[1]!='\n')) 
                  active=1;
            fclose(f);
      }
      g_free(destination_file);
      return active;
}

static void
navit_add_former_destinations_from_file(struct navit *this_)
{
      char *destination_file = navit_get_destination_file(FALSE);
      struct attr parent={attr_navit, .u.navit=this_};
      struct attr type={attr_type, {"textfile"}}, data={attr_data, {destination_file}};
      struct attr *attrs[]={&type, &data, NULL};
      struct map_rect *mr;
      struct item *item;
      int valid=0;
      struct coord c;
      struct pcoord pc;

      this_->former_destination=map_new(&parent, attrs);
      g_free(destination_file);
      if (!this_->route || !navit_former_destinations_active(this_))
            return;     
      mr=map_rect_new(this_->former_destination, NULL);
      while ((item=map_rect_get_item(mr))) {
            if (item->type == type_former_destination && item_coord_get(item, &c, 1)) 
                  valid=1;
      }
      map_rect_destroy(mr);
      pc.pro=map_projection(this_->former_destination);
      pc.x=c.x;
      pc.y=c.y;
      if (valid) {
            route_set_destination(this_->route, &pc, 1);
            this_->destination=pc;
            this_->destination_valid=1;
      }
}


static void
navit_textfile_debug_log(struct navit *this_, const char *fmt, ...)
{
      va_list ap;
      char *str1,*str2;
      va_start(ap, fmt);
      if (this_->textfile_debug_log && this_->vehicle) {
            str1=g_strdup_vprintf(fmt, ap);
            str2=g_strdup_printf("0x%x 0x%x%s%s\n", this_->vehicle->coord.x, this_->vehicle->coord.y, strlen(str1) ? " " : "", str1);
            log_write(this_->textfile_debug_log, str2, strlen(str2));
            g_free(str2);
            g_free(str1);
      }
            va_end(ap);
}

int 
navit_speech_estimate(struct navit *this_, char *str)
{
      return speech_estimate_duration(this_->speech, str);
}

void
navit_say(struct navit *this_, char *text)
{
      speech_say(this_->speech, text);
}

/**
 * @brief Toggles the navigation announcer for navit
 * @param this_ The navit object
 */
void
01091 navit_announcer_toggle(struct navit *this_)
{
    struct attr attr, speechattr;

    // search for the speech attribute
    if(!navit_get_attr(this_, attr_speech, &speechattr, NULL))
        return;
    // find out if the corresponding attribute attr_active has been set
    if(speech_get_attr(speechattr.u.speech, attr_active, &attr, NULL)) {
        // flip it then...
        attr.u.num = !attr.u.num;
    } else {
        // otherwise disable it because voice is enabled by default
        attr.type = attr_active;
        attr.u.num = 0;
    }

    // apply the new state
    if(!speech_set_attr(speechattr.u.speech, &attr))
        return;

    // announce that the speech attribute has changed
    callback_list_call_attr_0(this_->attr_cbl, attr_speech);
}

void
navit_speak(struct navit *this_)
{
      struct navigation *nav=this_->navigation;
      struct map *map=NULL;
      struct map_rect *mr=NULL;
      struct item *item;
      struct attr attr;

    if (!speech_get_attr(this_->speech, attr_active, &attr, NULL))
        attr.u.num = 1;
    dbg(1, "this_.speech->active %i\n", attr.u.num);
    if(!attr.u.num)
        return;

      if (nav)
            map=navigation_get_map(nav);
      if (map)
            mr=map_rect_new(map, NULL);
      if (mr) {
            while ((item=map_rect_get_item(mr)) && (item->type == type_nav_position || item->type == type_nav_none));
            if (item && item_attr_get(item, attr_navigation_speech, &attr)) {
                  speech_say(this_->speech, attr.u.str);
                  navit_add_message(this_, attr.u.str);
                  navit_textfile_debug_log(this_, "type=announcement label=\"%s\"", attr.u.str);
            }
            map_rect_destroy(mr);
      }
}

static void
navit_window_roadbook_update(struct navit *this_)
{
      struct navigation *nav=this_->navigation;
      struct map *map=NULL;
      struct map_rect *mr=NULL;
      struct item *item;
      struct attr attr;
      struct param_list param[5];
      int secs;

      dbg(1,"enter\n");
      datawindow_mode(this_->roadbook_window, 1);
      if (nav)
            map=navigation_get_map(nav);
      if (map)
            mr=map_rect_new(map, NULL);
      dbg(0,"nav=%p map=%p mr=%p\n", nav, map, mr);
      if (mr) {
            dbg(0,"while loop\n");
            while ((item=map_rect_get_item(mr))) {
                  dbg(0,"item=%p\n", item);
                  attr.u.str=NULL;
                  if (item->type != type_nav_position) {
                        item_attr_get(item, attr_navigation_long, &attr);
                        dbg(2, "Command='%s'\n", attr.u.str);
                        param[0].value=g_strdup(attr.u.str);
                  } else
                        param[0].value=_("Position");
                  param[0].name=_("Command");

                  item_attr_get(item, attr_length, &attr);
                  dbg(2, "Length=%d\n", attr.u.num);
                  param[1].name=_("Length");

                  if ( attr.u.num >= 2000 )
                  {
                        param[1].value=g_strdup_printf("%5.1f %s",(float)attr.u.num / 1000, _("km") );
                  }
                  else
                  {
                        param[1].value=g_strdup_printf("%7d %s",attr.u.num, _("m"));
                  }

                  item_attr_get(item, attr_time, &attr);
                  dbg(2, "Time=%d\n", attr.u.num);
                  secs=attr.u.num/10;
                  param[2].name=_("Time");
                  if ( secs >= 3600 )
                  {
                        param[2].value=g_strdup_printf("%d:%02d:%02d",secs / 60, ( secs / 60 ) % 60 , secs % 60);
                  }
                  else
                  {
                        param[2].value=g_strdup_printf("%d:%02d",secs / 60, secs % 60);
                  }

                  item_attr_get(item, attr_destination_length, &attr);
                  dbg(2, "Destlength=%d\n", attr.u.num);
                  param[3].name=_("Destination Length");
                  if ( attr.u.num >= 2000 )
                  {
                        param[3].value=g_strdup_printf("%5.1f %s",(float)attr.u.num / 1000, _("km") );
                  }
                  else
                  {
                        param[3].value=g_strdup_printf("%d %s",attr.u.num, _("m"));
                  }

                  item_attr_get(item, attr_destination_time, &attr);
                  dbg(2, "Desttime=%d\n", attr.u.num);
                  secs=attr.u.num/10;
                  param[4].name=_("Destination Time");
                  if ( secs >= 3600 )
                  {
                        param[4].value=g_strdup_printf("%d:%02d:%02d",secs / 3600, (secs / 60 ) % 60 , secs % 60);
                  }
                  else
                  {
                        param[4].value=g_strdup_printf("%d:%02d",secs / 60, secs % 60);
                  }
                  datawindow_add(this_->roadbook_window, param, 5);
            }
            map_rect_destroy(mr);
      }
      datawindow_mode(this_->roadbook_window, 0);
}

void
navit_window_roadbook_destroy(struct navit *this_)
{
      dbg(0, "enter\n");
      navigation_unregister_callback(this_->navigation, attr_navigation_long, this_->roadbook_callback);
      this_->roadbook_window=NULL;
      this_->roadbook_callback=NULL;
}
void
navit_window_roadbook_new(struct navit *this_)
{
      if (!this_->gui || this_->roadbook_callback || this_->roadbook_window) {
            return;
      }

      this_->roadbook_callback=callback_new_1(callback_cast(navit_window_roadbook_update), this_);
      navigation_register_callback(this_->navigation, attr_navigation_long, this_->roadbook_callback);
      this_->roadbook_window=gui_datawindow_new(this_->gui, _("Roadbook"), NULL, callback_new_1(callback_cast(navit_window_roadbook_destroy), this_));
      navit_window_roadbook_update(this_);
}

void
navit_init(struct navit *this_)
{
      struct mapset *ms;
      struct map *map;

      dbg(2,"enter gui %p graphics %p\n",this_->gui,this_->gra);
      if (!this_->gui) {
            dbg(0,"no gui\n");
            navit_destroy(this_);
            return;
      }
      if (!this_->gra) {
            dbg(0,"no graphics\n");
            navit_destroy(this_);
            return;
      }
      dbg(2,"Connecting gui to graphics\n");
      if (gui_set_graphics(this_->gui, this_->gra)) {
            struct attr attr_type_gui, attr_type_graphics;
            gui_get_attr(this_->gui, attr_type, &attr_type_gui, NULL);
            graphics_get_attr(this_->gra, attr_type, &attr_type_graphics, NULL);
            dbg(0,"failed to connect graphics '%s' to gui '%s'\n", attr_type_graphics.u.str, attr_type_gui.u.str);
            dbg(0," Please see http://wiki.navit-project.org/index.php/Failed_to_connect_graphics_to_gui\n");
            dbg(0," for explanations and solutions\n");

            navit_destroy(this_);
            return;
      }
      dbg(2,"Initializing graphics\n");
      graphics_init(this_->gra);
      dbg(2,"Setting Vehicle\n");
      navit_set_vehicle(this_, this_->vehicle);
      dbg(2,"Adding dynamic maps to mapset %p\n",this_->mapsets);
      if (this_->mapsets) {
            ms=this_->mapsets->data;
            if (this_->route) {
                  if ((map=route_get_map(this_->route)))
                        mapset_add_attr(ms, &(struct attr){attr_map,.u.map=map});
                  if ((map=route_get_graph_map(this_->route))) {
                        mapset_add_attr(ms, &(struct attr){attr_map,.u.map=map});
                        map_set_attr(map, &(struct attr ){attr_active,.u.num=0});
                  }
                  route_set_mapset(this_->route, ms);
                  route_set_projection(this_->route, transform_get_projection(this_->trans));
            }
            if (this_->tracking) {
                  tracking_set_mapset(this_->tracking, ms);
                  if (this_->route)
                        tracking_set_route(this_->tracking, this_->route);
            }
            if (this_->navigation) {
                  if ((map=navigation_get_map(this_->navigation))) {
                        mapset_add_attr(ms, &(struct attr){attr_map,.u.map=map});
                        map_set_attr(map, &(struct attr ){attr_active,.u.num=0});
                  }
            }
            if (this_->tracking) {
                  if ((map=tracking_get_map(this_->tracking))) {
                        mapset_add_attr(ms, &(struct attr){attr_map,.u.map=map});
                        map_set_attr(map, &(struct attr ){attr_active,.u.num=0});
                  }
            }
            navit_add_bookmarks_from_file(this_);
            navit_add_former_destinations_from_file(this_);
      }
      if (this_->route) {
            struct attr callback;
            this_->route_cb=callback_new_attr_1(callback_cast(navit_redraw_route), attr_route_status, this_);
            callback.type=attr_callback;
            callback.u.callback=this_->route_cb;
            route_add_attr(this_->route, &callback);
      }
      if (this_->navigation) {
            if (this_->speech) {
                  this_->nav_speech_cb=callback_new_1(callback_cast(navit_speak), this_);
                  navigation_register_callback(this_->navigation, attr_navigation_speech, this_->nav_speech_cb);
            }
            if (this_->route)
                  navigation_set_route(this_->navigation, this_->route);
      }
      dbg(2,"Setting Center\n");
      char *center_file = navit_get_center_file(FALSE);
      navit_set_center_from_file(this_, center_file);
      g_free(center_file);
#if 0
      if (this_->menubar) {
            men=menu_add(this_->menubar, "Data", menu_type_submenu, NULL);
            if (men) {
                  navit_add_menu_windows_items(this_, men);
            }
      }
#endif
      global_navit=this_;
#if 0
      navit_window_roadbook_new(this_);
      navit_window_items_new(this_);
#endif
      callback_list_call_attr_1(this_->attr_cbl, attr_navit, this_);
      this_->ready|=1;

      messagelist_init(this_->messages);

      dbg(2,"ready=%d\n",this_->ready);
      if (this_->ready == 3)
            navit_draw(this_);
}

void
navit_zoom_to_route(struct navit *this_, int orientation)
{
      struct map *map;
      struct map_rect *mr=NULL;
      struct item *item;
      struct coord c;
      struct coord_rect r;
      int count=0,scale=16;
      if (! this_->route)
            return;
      dbg(1,"enter\n");
      map=route_get_map(this_->route);
      dbg(1,"map=%p\n",map);
      if (map)
            mr=map_rect_new(map, NULL);
      dbg(1,"mr=%p\n",mr);
      if (mr) {
            while ((item=map_rect_get_item(mr))) {
                  dbg(1,"item=%s\n", item_to_name(item->type));
                  while (item_coord_get(item, &c, 1)) {
                        dbg(1,"coord\n");
                        if (!count) 
                              r.lu=r.rl=c;
                        else
                              coord_rect_extend(&r, &c);    
                        count++;
                  }
            }
      }
      if (! count)
            return;
      c.x=(r.rl.x+r.lu.x)/2;
      c.y=(r.rl.y+r.lu.y)/2;
      dbg(1,"count=%d\n",count);
      if (orientation != -1)
            transform_set_yaw(this_->trans, orientation);
      transform_set_center(this_->trans, &c);
      dbg(1,"%x,%x-%x,%x\n", r.rl.x,r.rl.y,r.lu.x,r.lu.y);
      while (scale < 1<<20) {
            struct point p1,p2;
            transform_set_scale(this_->trans, scale);
            transform_setup_source_rect(this_->trans);
            transform(this_->trans, transform_get_projection(this_->trans), &r.lu, &p1, 1, 0, 0, NULL);
            transform(this_->trans, transform_get_projection(this_->trans), &r.rl, &p2, 1, 0, 0, NULL);
            dbg(1,"%d,%d-%d,%d\n",p1.x,p1.y,p2.x,p2.y);
            if (p1.x < 0 || p2.x < 0 || p1.x > this_->w || p2.x > this_->w ||
                p1.y < 0 || p2.y < 0 || p1.y > this_->h || p2.y > this_->h)
                  scale*=2;
            else
                  break;
      
      }
      if (this_->ready == 3)
            navit_draw_async(this_,0);
}

static void
navit_cmd_zoom_to_route(struct navit *this)
{
      navit_zoom_to_route(this, 0);
}

/**
 * Change the current zoom level
 *
 * @param navit The navit instance
 * @param center The point where to center the map, including its projection
 * @returns nothing
 */
void
01434 navit_set_center(struct navit *this_, struct pcoord *center)
{
      struct coord *c=transform_center(this_->trans);
      struct coord c1,c2;
      enum projection pro = transform_get_projection(this_->trans);
      if (pro != center->pro) {
            c1.x = center->x;
            c1.y = center->y;
            transform_from_to(&c1, center->pro, &c2, pro);
      } else {
            c2.x = center->x;
            c2.y = center->y;
      }
      *c=c2;
      if (this_->ready == 3)
            navit_draw(this_);
}

static void
navit_set_center_coord_screen(struct navit *this_, struct coord *c, struct point *p)
{
      int width, height;
      struct point po;
      transform_set_center(this_->trans, c);
      transform_get_size(this_->trans, &width, &height);
      po.x=width/2;
      po.y=height/2;
      update_transformation(this_->trans, &po, p, NULL);
}

static int
navit_get_cursor_pnt(struct navit *this_, struct point *p, int *dir)
{
      int width, height;
      struct navit_vehicle *nv=this_->vehicle;
      transform_get_size(this_->trans, &width, &height);
      if (this_->orientation == -1) {
            p->x=50*width/100;
            p->y=80*height/100;
            if (dir)
                  *dir=nv->dir;
      } else {
            int mdir;
            if (this_->tracking && this_->tracking_flag) {
                  mdir = tracking_get_angle(this_->tracking) - this_->orientation;
            } else {
                  mdir=nv->dir-this_->orientation;
            }

            p->x=(50 - 30.*sin(M_PI*mdir/180.))*width/100;
            p->y=(50 + 30.*cos(M_PI*mdir/180.))*height/100;
            if (dir)
                  *dir=this_->orientation;
      }
      return 1;
}

static void
navit_set_center_cursor(struct navit *this_)
{
      int dir;
      struct point pn;
      struct navit_vehicle *nv=this_->vehicle;
      navit_get_cursor_pnt(this_, &pn, &dir);
      transform_set_yaw(this_->trans, dir);
      navit_set_center_coord_screen(this_, &nv->coord, &pn);
      navit_autozoom(this_, &nv->coord, nv->speed, 0);
      if (this_->ready == 3)
            navit_draw_async(this_, 1);
}

static void
navit_cmd_set_center_cursor(struct navit *this_)
{
      navit_set_center_cursor(this_);
}

void
navit_set_center_screen(struct navit *this_, struct point *p)
{
      struct coord c;
      struct pcoord pc;
      transform_reverse(this_->trans, p, &c);
      pc.x = c.x;
      pc.y = c.y;
      pc.pro = transform_get_projection(this_->trans);
      navit_set_center(this_, &pc);
}

#if 0
            switch((*attrs)->type) {
            case attr_zoom:
                  zoom=(*attrs)->u.num;
                  break;
            case attr_center:
                  g=*((*attrs)->u.coord_geo);
                  break;
#endif

static int
navit_set_attr_do(struct navit *this_, struct attr *attr, int init)
{
      int dir=0, orient_old=0, attr_updated=0;
      struct coord co;
      long zoom;

      switch (attr->type) {
      case attr_autozoom:
            attr_updated=(this_->autozoom_secs != attr->u.num);
            this_->autozoom_secs = attr->u.num;
            break;
      case attr_autozoom_active:
            attr_updated=(this_->autozoom_active != attr->u.num);
            this_->autozoom_active = attr->u.num;
            break;
      case attr_center:
            transform_from_geo(transform_get_projection(this_->trans), attr->u.coord_geo, &co);
            dbg(1,"0x%x,0x%x\n",co.x,co.y);
            transform_set_center(this_->trans, &co);
            break;
      case attr_drag_bitmap:
            attr_updated=(this_->drag_bitmap != !!attr->u.num);
            this_->drag_bitmap=!!attr->u.num;
            break;
      case attr_follow:
            if (!this_->vehicle)
                  return 0;
            attr_updated=(this_->vehicle->follow_curr != attr->u.num);
            this_->vehicle->follow_curr = attr->u.num;
            break;
      case attr_layout:
            if(this_->layout_current!=attr->u.layout) {
                  this_->layout_current=attr->u.layout;
                  graphics_font_destroy_all(this_->gra);
                  navit_draw(this_);
                  attr_updated=1;
            }
            break;
      case attr_orientation:
            orient_old=this_->orientation;
            this_->orientation=attr->u.num;
            if (!init) {
                  if (this_->orientation != -1) {
                        dir = this_->orientation;
                  } else {
                        if (this_->vehicle) {
                              dir = this_->vehicle->dir;
                        }
                  }
                  transform_set_yaw(this_->trans, dir);
                  if (orient_old != this_->orientation) {
                        if (this_->ready == 3)
                              navit_draw(this_);
                        attr_updated=1;
                  }
            }
            break;
      case attr_osd_configuration:
            dbg(0,"setting osd_configuration to %d (was %d)\n", attr->u.num, this_->osd_configuration);
            attr_updated=(this_->osd_configuration != attr->u.num);
            this_->osd_configuration=attr->u.num;
            break;
      case attr_pitch:
            attr_updated=(this_->pitch != attr->u.num);
            this_->pitch=attr->u.num;
            transform_set_pitch(this_->trans, this_->pitch);
            if (!init && attr_updated && this_->ready == 3)
                  navit_draw(this_);
            break;
      case attr_projection:
            if(this_->trans && transform_get_projection(this_->trans) != attr->u.projection) {
                  navit_projection_set(this_, attr->u.projection);
                  attr_updated=1;
            }
            break;
      case attr_recent_dest:
            attr_updated=(this_->recentdest_count != attr->u.num);
            this_->recentdest_count=attr->u.num;
            break;
      case attr_speech:
            if(this_->speech && this_->speech != attr->u.speech) {
                  attr_updated=1;
                  this_->speech = attr->u.speech;
            }
            break;
      case attr_timeout:
            attr_updated=(this_->center_timeout != attr->u.num);
            this_->center_timeout = attr->u.num;
            break;
      case attr_tracking:
            attr_updated=(this_->tracking_flag != !!attr->u.num);
            this_->tracking_flag=!!attr->u.num;
            break;
      case attr_use_mousewheel:
            attr_updated=(this_->use_mousewheel != !!attr->u.num);
            this_->use_mousewheel=!!attr->u.num;
            break;
      case attr_vehicle:
            if (!this_->vehicle || this_->vehicle->vehicle != attr->u.vehicle) {
                  GList *l;
                  struct navit_vehicle *nv;
                  struct attr active=(struct attr){attr_active,{(void *)0}};
                  l=this_->vehicles;
                  while(l) {
                        nv=l->data;
                        if (nv->vehicle == attr->u.vehicle) {
                              if (this_->vehicle)
                                    vehicle_set_attr(this_->vehicle->vehicle, &active, NULL);
                              active.u.num=1;
                              vehicle_set_attr(nv->vehicle, &active, NULL);
                              navit_set_vehicle(this_, nv);
                              attr_updated=1;
                        }
                        l=g_list_next(l);
                  }
            }
            break;
      case attr_zoom:
            zoom=transform_get_scale(this_->trans);
            attr_updated=(zoom != attr->u.num);
            transform_set_scale(this_->trans, attr->u.num);
            if (attr_updated && !init) 
                  navit_draw(this_);
            break;
      case attr_message:
            navit_add_message(this_, attr->u.str);
            break;
      default:
            return 0;
      }
      if (attr_updated && !init) {
            callback_list_call_attr_2(this_->attr_cbl, attr->type, this_, attr);
            if (attr->type == attr_osd_configuration)
                  graphics_draw_mode(this_->gra, draw_mode_end);
      }
      return 1;
}

int
navit_set_attr(struct navit *this_, struct attr *attr)
{
      return navit_set_attr_do(this_, attr, 0);
}

int
navit_get_attr(struct navit *this_, enum attr_type type, struct attr *attr, struct attr_iter *iter)
{
      struct message *msg;
      int len,offset;
      int ret=1;

      switch (type) {
      case attr_message:
            msg = navit_get_messages(this_);
            
            if (!msg) {
                  return 0;
            }

            len = 0;
            while (msg) {
                  len += strlen(msg->text) + 1;
                  msg = msg->next;
            }
            attr->u.str = g_malloc(len + 1);
            
            msg = navit_get_messages(this_);
            offset = 0;
            while (msg) {
                  g_stpcpy((attr->u.str + offset), msg->text);
                  offset += strlen(msg->text);
                  attr->u.str[offset] = '\n';
                  offset++;

                  msg = msg->next;
            }

            attr->u.str[len] = '\0';
            break;
      case attr_bookmark_map:
            attr->u.map=this_->bookmark;
            break;
      case attr_callback_list:
            attr->u.callback_list=this_->attr_cbl;
            break;
      case attr_destination:
            if (! this_->destination_valid)
                  return 0;
            attr->u.pcoord=&this_->destination;
            break;
      case attr_displaylist:
            attr->u.displaylist=this_->displaylist;
            return (attr->u.displaylist != NULL);
      case attr_former_destination_map:
            attr->u.map=this_->former_destination;
            break;
      case attr_graphics:
            attr->u.graphics=this_->gra;
            ret=(attr->u.graphics != NULL);
            break;
      case attr_gui:
            attr->u.gui=this_->gui;
            ret=(attr->u.gui != NULL);
            break;
      case attr_layout:
            if (iter) {
                  if (iter->u.list) {
                        iter->u.list=g_list_next(iter->u.list);
                  } else { 
                        iter->u.list=this_->layouts;
                  }
                  if (!iter->u.list)
                        return 0;
                  attr->u.layout=(struct layout *)iter->u.list->data;
            } else {
                  attr->u.layout=this_->layout_current;
            }
            break;
      case attr_map:
            if (iter && this_->mapsets) {
                  if (!iter->u.mapset_handle) {
                        iter->u.mapset_handle=mapset_open((struct mapset *)this_->mapsets->data);
                  }
                  attr->u.map=mapset_next(iter->u.mapset_handle, 0);
                  if(!attr->u.map) {
                        mapset_close(iter->u.mapset_handle);
                        return 0;
                  }
            } else {
                  return 0;
            }
            break;
      case attr_mapset:
            attr->u.mapset=this_->mapsets->data;
            return (attr->u.mapset != NULL);
      case attr_navigation:
            attr->u.navigation=this_->navigation;
            break;
      case attr_orientation:
            attr->u.num=this_->orientation;
            break;
      case attr_osd_configuration:
            attr->u.num=this_->osd_configuration;
            break;
      case attr_projection:
            if(this_->trans) {
                  attr->u.num=transform_get_projection(this_->trans);
            } else {
                  return 0;
            }
            break;
      case attr_route:
            attr->u.route=this_->route;
            break;
      case attr_speech:
              attr->u.speech=this_->speech;
              break;
      case attr_tracking:
            attr->u.num=this_->tracking_flag;
            break;
      case attr_transformation:
            attr->u.transformation=this_->trans;
            break;
      case attr_vehicle:
            if(iter) {
                  if(iter->u.list) {
                        iter->u.list=g_list_next(iter->u.list);
                  } else { 
                        iter->u.list=this_->vehicles;
                  }
                  if(!iter->u.list)
                        return 0;
                  attr->u.vehicle=((struct navit_vehicle*)iter->u.list->data)->vehicle;
            } else {
                  if(this_->vehicle) {
                        attr->u.vehicle=this_->vehicle->vehicle;
                  } else {
                        return 0;
                  }
            }
            break;
      case attr_zoom:
            attr->u.num=transform_get_scale(this_->trans);
            break;
      case attr_autozoom_active:
            attr->u.num=this_->autozoom_active;
            break;
      default:
            return 0;
      }
      attr->type=type;
      return ret;
}

static int
navit_add_log(struct navit *this_, struct log *log)
{
      struct attr type_attr;
      if (!log_get_attr(log, attr_type, &type_attr, NULL))
            return 0;
      if (!strcmp(type_attr.u.str, "textfile_debug")) {
            char *header = "type=track_tracked\n";
            if (this_->textfile_debug_log)
                  return 0;
            log_set_header(log, header, strlen(header));
            this_->textfile_debug_log=log;
            return 1;
      }
      return 0;
}

int
navit_add_attr(struct navit *this_, struct attr *attr)
{
      int ret=1;
      switch (attr->type) {
      case attr_callback:
            navit_add_callback(this_, attr->u.callback);
            break;
      case attr_log:
            ret=navit_add_log(this_, attr->u.log);
            break;
      case attr_gui:
            ret=navit_set_gui(this_, attr->u.gui);
            break;
      case attr_graphics:
            ret=navit_set_graphics(this_, attr->u.graphics);
            break;
      case attr_layout:
            this_->layouts = g_list_append(this_->layouts, attr->u.layout);
            if(!this_->layout_current) 
                  this_->layout_current=attr->u.layout;
            break;
      case attr_route:
            this_->route=attr->u.route;
            break;
      case attr_mapset:
            this_->mapsets = g_list_append(this_->mapsets, attr->u.mapset);
            break;
      case attr_navigation:
            this_->navigation=attr->u.navigation;
            break;
      case attr_recent_dest:
            this_->recentdest_count = attr->u.num;
            break;
      case attr_speech:
            this_->speech=attr->u.speech;
            break;
      case attr_tracking:
            this_->tracking=attr->u.tracking;
            break;
      case attr_vehicle:
            ret=navit_add_vehicle(this_, attr->u.vehicle);
            break;
      case attr_vehicleprofile:
            this_->vehicleprofiles=g_list_prepend(this_->vehicleprofiles, attr->u.vehicleprofile);
            break;
      case attr_autozoom_min:
            this_->autozoom_min = attr->u.num;
            break;
      default:
            return 0;
      }
      callback_list_call_attr_2(this_->attr_cbl, attr->type, this_, attr);
      return ret;
}

int
navit_remove_attr(struct navit *this_, struct attr *attr)
{
      int ret=1;
      switch (attr->type) {
      case attr_callback:
            navit_remove_callback(this_, attr->u.callback);
            break;
      default:
            return 0;
      }
      return ret;
}

struct attr_iter *
navit_attr_iter_new()
{
      return g_new0(struct attr_iter, 1);
}

void
navit_attr_iter_destroy(struct attr_iter *iter)
{
      g_free(iter);
}

void
navit_add_callback(struct navit *this_, struct callback *cb)
{
      callback_list_add(this_->attr_cbl, cb);
}

void
navit_remove_callback(struct navit *this_, struct callback *cb)
{
      callback_list_remove(this_->attr_cbl, cb);
}

/**
 * Toggle the cursor update : refresh the map each time the cursor has moved (instead of only when it reaches a border)
 *
 * @param navit The navit instance
 * @returns nothing
 */

static void
01947 navit_vehicle_draw(struct navit *this_, struct navit_vehicle *nv, struct point *pnt)
{
      struct point cursor_pnt;
      enum projection pro;
      struct attr cursor;

      if (this_->blocked)
            return;
      if (! vehicle_get_attr(nv->vehicle, attr_cursor, &cursor, NULL))
            return;
      if (! cursor.u.cursor)
            return;
      if (pnt)
            cursor_pnt=*pnt;
      else {
            pro=transform_get_projection(this_->trans);
            transform(this_->trans, pro, &nv->coord, &cursor_pnt, 1, 0, 0, NULL);
      }
      cursor_draw(cursor.u.cursor, this_->gra, &cursor_pnt, pnt ? 0:1, nv->dir-transform_get_yaw(this_->trans), nv->speed);
#if 0 
      if (pnt)
            pnt2=*pnt;
      else {
            pro=transform_get_projection(this_->trans);
            transform(this_->trans, pro, &nv->coord, &pnt2, 1);
      }
#if 1
      cursor_draw(nv->cursor, &pnt2, nv->dir-transform_get_angle(this_->trans, 0), nv->speed > 2, pnt == NULL);
#else
      cursor_draw(nv->cursor, &pnt2, nv->dir-transform_get_angle(this_->trans, 0), nv->speed > 2, 1);
#endif
#endif
}

static void
navit_vehicle_update(struct navit *this_, struct navit_vehicle *nv)
{
      struct attr attr_valid, attr_dir, attr_speed, attr_pos;
      struct pcoord cursor_pc;
      struct point cursor_pnt, *pnt=&cursor_pnt;
      struct tracking *tracking=NULL;
      enum projection pro=transform_get_projection(this_->trans);
      int border=16;
      int (*get_attr)(void *, enum attr_type, struct attr *, struct attr_iter *);
      void *attr_object;

      profile(0,NULL);
      if (this_->ready != 3) {
            profile(0,"return 1\n");
            return;
      }
      if (this_->vehicle == nv && this_->tracking_flag)
            tracking=this_->tracking;
      if (tracking) {
            tracking_update(tracking, nv->vehicle, this_->vehicleprofile, pro);
            attr_object=tracking;
            get_attr=(int (*)(void *, enum attr_type, struct attr *, struct attr_iter *))tracking_get_attr;
      } else {
            attr_object=nv->vehicle;
            get_attr=(int (*)(void *, enum attr_type, struct attr *, struct attr_iter *))vehicle_get_attr;
      }
      if (get_attr(attr_object, attr_position_valid, &attr_valid, NULL))
            if (!attr_valid.u.num != attr_position_valid_invalid)
                  return;
      if (! get_attr(attr_object, attr_position_direction, &attr_dir, NULL) ||
          ! get_attr(attr_object, attr_position_speed, &attr_speed, NULL) ||
          ! get_attr(attr_object, attr_position_coord_geo, &attr_pos, NULL)) {
            profile(0,"return 2\n");
            return;
      }
      nv->dir=*attr_dir.u.numd;
      nv->speed=*attr_speed.u.numd;
      transform_from_geo(pro, attr_pos.u.coord_geo, &nv->coord);
      if (nv != this_->vehicle) {
            navit_vehicle_draw(this_, nv, NULL);
            profile(0,"return 3\n");
            return;
      }
      cursor_pc.x = nv->coord.x;
      cursor_pc.y = nv->coord.y;
      cursor_pc.pro = pro;
      if (this_->route) {
            if (tracking)
                  route_set_position_from_tracking(this_->route, tracking, pro);
            else
                  route_set_position(this_->route, &cursor_pc);
      }
      callback_list_call_attr_0(this_->attr_cbl, attr_position);
      navit_textfile_debug_log(this_, "type=trackpoint_tracked");
      if (this_->gui && nv->speed > 2)
            gui_disable_suspend(this_->gui);

      transform(this_->trans, pro, &nv->coord, &cursor_pnt, 1, 0, 0, NULL);
      if (this_->button_pressed != 1 && nv->follow_curr <= nv->follow && 
            (nv->follow_curr == 1 || !transform_within_border(this_->trans, &cursor_pnt, border)))
            navit_set_center_cursor(this_);
      else
            navit_vehicle_draw(this_, nv, pnt);

      if (nv->follow_curr > 1)
            nv->follow_curr--;
      else
            nv->follow_curr=nv->follow;
      callback_list_call_attr_2(this_->attr_cbl, attr_position_coord_geo, this_, nv->vehicle);

      /* Finally, if we reached our destination, stop navigation. */
      if (this_->route && route_destination_reached(this_->route)) {
            navit_set_destination(this_, NULL, NULL, 0);
      }
      profile(0,"return 5\n");
}

/**
 * Set the position of the vehicle
 *
 * @param navit The navit instance
 * @param c The coordinate to set as position
 * @returns nothing
 */

void
02068 navit_set_position(struct navit *this_, struct pcoord *c)
{
      if (this_->route) {
            route_set_position(this_->route, c);
            callback_list_call_attr_0(this_->attr_cbl, attr_position);
      }
      if (this_->ready == 3)
            navit_draw(this_);
}

static int
navit_set_vehicleprofile(struct navit *this_, char *name)
{
      struct attr attr;
      GList *l;
      l=this_->vehicleprofiles;
      while (l) {
            if (vehicleprofile_get_attr(l->data, attr_name, &attr, NULL)) {
                  if (!strcmp(attr.u.str, name)) {
                        this_->vehicleprofile=l->data;
                        if (this_->route)
                              route_set_profile(this_->route, this_->vehicleprofile);
                        return 1;
                  }
            }
            l=g_list_next(l);
      }
      return 0;
}

static void
navit_set_vehicle(struct navit *this_, struct navit_vehicle *nv)
{
      struct attr attr;
      this_->vehicle=nv;
      if (nv && vehicle_get_attr(nv->vehicle, attr_profilename, &attr, NULL)) {
            if (navit_set_vehicleprofile(this_, attr.u.str))
                  return;
      }
      navit_set_vehicleprofile(this_,"car");
}

/**
 * Register a new vehicle
 *
 * @param navit The navit instance
 * @param v The vehicle instance
 * @returns 1 for success
 */
static int
02118 navit_add_vehicle(struct navit *this_, struct vehicle *v)
{
      struct navit_vehicle *nv=g_new0(struct navit_vehicle, 1);
      struct attr follow,color,active, color2, animate;
      nv->vehicle=v;
      nv->follow=0;
      nv->last.x = 0;
      nv->last.y = 0;
      nv->animate_cursor=0;
      if ((vehicle_get_attr(v, attr_follow, &follow, NULL)))
            nv->follow=nv->follow=follow.u.num;
      if ((vehicle_get_attr(v, attr_color, &color, NULL)))
            nv->c=*(color.u.color);
      if ((vehicle_get_attr(v, attr_color2, &color2, NULL)))
            nv->c2=color2.u.color;
      else
            nv->c2=NULL;
      nv->follow_curr=nv->follow;
      this_->vehicles=g_list_append(this_->vehicles, nv);
      if ((vehicle_get_attr(v, attr_active, &active, NULL)) && active.u.num)
            navit_set_vehicle(this_, nv);
      if ((vehicle_get_attr(v, attr_animate, &animate, NULL)))
            nv->animate_cursor=animate.u.num;
      nv->callback.type=attr_callback;
      nv->callback.u.callback=callback_new_2(callback_cast(navit_vehicle_update), this_, nv);
      vehicle_add_attr(nv->vehicle, &nv->callback);
      vehicle_set_attr(nv->vehicle, &this_->self, NULL);
      return 1;
}




struct gui *
navit_get_gui(struct navit *this_)
{
      return this_->gui;
}

struct transformation *
navit_get_trans(struct navit *this_)
{
      return this_->trans;
}

struct route *
navit_get_route(struct navit *this_)
{
      return this_->route;
}

struct navigation *
navit_get_navigation(struct navit *this_)
{
      return this_->navigation;
}

struct displaylist *
navit_get_displaylist(struct navit *this_)
{
      return this_->displaylist;
}

int
navit_block(struct navit *this_, int block)
{
      if (block) {
            this_->blocked |= 1;
            if (graphics_draw_cancel(this_->gra, this_->displaylist))
                  this_->blocked |= 2;
            return 0;
      }
      if (this_->blocked & 2) {
            this_->blocked=0;
            navit_draw(this_);
            return 1;
      }
      this_->blocked=0;
      return 0;
}

void
navit_destroy(struct navit *this_)
{
      /* TODO: destroy objects contained in this_ */
      if (this_->vehicle)
            vehicle_destroy(this_->vehicle->vehicle);
      main_remove_navit(this_);
      char *center_file = navit_get_center_file(TRUE);
      navit_write_center_to_file(this_, center_file);
      g_free(center_file);
      callback_destroy(this_->nav_speech_cb);
      callback_destroy(this_->roadbook_callback);
      callback_destroy(this_->popup_callback);
      callback_destroy(this_->motion_timeout_callback);
      if(this_->gra)
        graphics_remove_callback(this_->gra, this_->resize_callback);
      callback_destroy(this_->resize_callback);
      if(this_->gra)
        graphics_remove_callback(this_->gra, this_->button_callback);
      callback_destroy(this_->button_callback);
      if(this_->gra)
        graphics_remove_callback(this_->gra, this_->motion_callback);
      callback_destroy(this_->motion_callback);
      g_free(this_);
}

/** @} */

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