src/viksearch.c

   1 /*
   2  * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
   3  *
   4  * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * Created by Quy Tonthat <qtonthat@gmail.com>
  21  */
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <glib.h>
  29 #include <glib/gstdio.h>
  30 #include <glib/gprintf.h>
  31 #include <glib/gi18n.h>
  32
  33 #include "viking.h"
  34 #include "util.h"
  35 #include "curl_download.h"
  36
  37 #include "viksearchtool.h"
  38
  39 static gchar *last_search_str = NULL;
  40 static VikCoord *last_coord = NULL;
  41 static gchar *last_successful_search_str = NULL;
  42
  43 static GList *search_tools_list = NULL;
  44
  45 int last_search_tool = -1;
  46
  47 void vik_search_register ( VikSearchTool *tool )
  48 {
  49   IS_VIK_SEARCH_TOOL( tool );
  50
  51   search_tools_list = g_list_append ( search_tools_list, g_object_ref ( tool ) );
  52 }
  53
  54 void vik_search_unregister_all ()
  55 {
  56   g_list_foreach ( search_tools_list, (GFunc) g_object_unref, NULL );
  57 }
  58
  59 gchar * a_vik_search_get_search_string_for_this_place(VikWindow *vw)
  60 {
  61   if (!last_coord)
  62     return NULL;
  63
  64   VikViewport *vvp = vik_window_viewport(vw);
  65   const VikCoord *cur_center = vik_viewport_get_center(vvp);
  66   if (vik_coord_equals(cur_center, last_coord)) {
  67     return(last_successful_search_str);
  68   }
  69   else
  70     return NULL;
  71 }
  72
  73 static void display_no_tool(VikWindow *vw)
  74 {
  75   GtkWidget *dialog = NULL;
  76
  77   dialog = gtk_message_dialog_new ( GTK_WINDOW(vw), GTK_DIALOG_MODAL, GTK_MESSAGE_WARNING, GTK_BUTTONS_OK, _("No search tool available.") );
  78
  79   gtk_dialog_run ( GTK_DIALOG(dialog) );
  80
  81   gtk_widget_destroy(dialog);
  82 }
  83
  84 static gboolean prompt_try_again(VikWindow *vw)
  85 {
  86   GtkWidget *dialog = NULL;
  87   gboolean ret = TRUE;
  88
  89   dialog = gtk_dialog_new_with_buttons ( "", GTK_WINDOW(vw), 0, GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT, NULL );
  90   gtk_window_set_title(GTK_WINDOW(dialog), _("Search"));
  91
  92   GtkWidget *search_label = gtk_label_new(_("I don't know that place. Do you want another search?"));
  93   gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), search_label, FALSE, FALSE, 5 );
  94   gtk_widget_show_all(dialog);
  95
  96   if ( gtk_dialog_run ( GTK_DIALOG(dialog) ) != GTK_RESPONSE_ACCEPT )
  97     ret = FALSE;
  98
  99   gtk_widget_destroy(dialog);
 100   return ret;
 101 }
 102
 103 static gchar *  a_prompt_for_search_string(VikWindow *vw)
 104 {
 105   GtkWidget *dialog = NULL;
 106
 107   dialog = gtk_dialog_new_with_buttons ( "", GTK_WINDOW(vw), 0, GTK_STOCK_OK, GTK_RESPONSE_ACCEPT, GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT, NULL );
 108   gtk_window_set_title(GTK_WINDOW(dialog), _("Search"));
 109
 110   GtkWidget *tool_label = gtk_label_new(_("Search provider:"));
 111   GtkWidget *tool_list = gtk_combo_box_new_text ();
 112
 113   GList *current = g_list_first (search_tools_list);
 114   while (current != NULL)
 115   {
 116     char *label = NULL;
 117     VikSearchTool *tool = current->data;
 118     label = vik_search_tool_get_label (tool);
 119     gtk_combo_box_append_text ( GTK_COMBO_BOX( tool_list ), label);
 120     current = g_list_next (current);
 121   }
 122   /* Set the first provider as default */
 123   gtk_combo_box_set_active ( GTK_COMBO_BOX( tool_list ), 0);
 124
 125   GtkWidget *search_label = gtk_label_new(_("Enter address or place name:"));
 126   GtkWidget *search_entry = gtk_entry_new();
 127   if (last_search_str)
 128     gtk_entry_set_text(GTK_ENTRY(search_entry), last_search_str);
 129
 130   gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), tool_label, FALSE, FALSE, 5 );
 131   gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), tool_list, FALSE, FALSE, 5 );
 132   gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), search_label, FALSE, FALSE, 5 );
 133   gtk_box_pack_start ( GTK_BOX(GTK_DIALOG(dialog)->vbox), search_entry, FALSE, FALSE, 5 );
 134   gtk_widget_show_all(dialog);
 135
 136   if ( gtk_dialog_run ( GTK_DIALOG(dialog) ) != GTK_RESPONSE_ACCEPT ) {
 137     gtk_widget_destroy(dialog);
 138     return NULL;
 139   }
 140
 141   last_search_tool = gtk_combo_box_get_active ( GTK_COMBO_BOX (tool_list) );
 142
 143   gchar *search_str = g_strdup ( gtk_entry_get_text ( GTK_ENTRY(search_entry) ) );
 144
 145   gtk_widget_destroy(dialog);
 146
 147   if (search_str[0] != '\0') {
 148     if (last_search_str)
 149       g_free(last_search_str);
 150     last_search_str = g_strdup(search_str);
 151   }
 152
 153   return(search_str);   /* search_str needs to be freed by caller */
 154 }
 155
 156 void a_vik_search(VikWindow *vw, VikLayersPanel *vlp, VikViewport *vvp)
 157 {
 158   VikCoord new_center;
 159   gchar *s_str;
 160   gboolean more = TRUE;
 161
 162   if (search_tools_list == NULL)
 163   {
 164     /* Empty list */
 165     display_no_tool(vw);
 166     return;
 167   }
 168
 169   do {
 170     s_str = a_prompt_for_search_string(vw);
 171     if ((!s_str) || (s_str[0] == 0)) {
 172       more = FALSE;
 173     }
 174
 175     else if (!vik_search_tool_get_coord(g_list_nth_data (search_tools_list, last_search_tool), vw, vvp, s_str, &new_center)) {
 176       if (last_coord)
 177         g_free(last_coord);
 178       last_coord = g_malloc(sizeof(VikCoord));
 179       *last_coord = new_center;
 180       if (last_successful_search_str)
 181         g_free(last_successful_search_str);
 182       last_successful_search_str = g_strdup(last_search_str);
 183       vik_viewport_set_center_coord(vvp, &new_center);
 184       vik_layers_panel_emit_update(vlp);
 185       more = FALSE;
 186     }
 187     else if (!prompt_try_again(vw))
 188         more = FALSE;
 189     g_free(s_str);
 190   } while (more);
 191 }