mdw@git.distorted.org.uk Git - disorder/blob - disobedience/globals.c

   1 /*
   2  * This file is part of DisOrder.
   3  * Copyright (C) 2011 Richard Kettlewell
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 /** @file disobedience/globals.c
  19  * @brief Track global preferences
  20  */
  21
  22 #include "disobedience.h"
  23
  24 static GtkWidget *globals_window;
  25
  26 struct globals_row;
  27
  28 /** @brief Handler for the presentation form of a global preference */
  29 struct global_handler {
  30   /** @brief Initialize */
  31   void (*init)(struct globals_row *row);
  32
  33   /** @brief Convert presentation form to string */
  34   const char *(*get)(struct globals_row *row);
  35
  36   /** @brief Convert string to presentation form */
  37   void (*set)(struct globals_row *row, const char *value);
  38 };
  39
  40 /** @brief Definition of a global preference */
  41 struct globals_row {
  42   const char *label;
  43   const char *pref;
  44   GtkWidget *widget;
  45   const struct global_handler *handler;
  46   int initialized;
  47 };
  48
  49 static void globals_close(GtkButton attribute((unused)) *button,
  50                          gpointer attribute((unused)) userdata);
  51 static void globals_row_changed(struct globals_row *row);
  52
  53 /** @brief Called when the user changes the contents of a string entry */
  54 static void global_string_entry_changed(GtkEditable attribute((unused)) *editable,
  55                                         gpointer user_data) {
  56   struct globals_row *row = user_data;
  57   globals_row_changed(row);
  58 }
  59
  60 /** @brief Initialize a global presented as a string */
  61 static void global_string_init(struct globals_row *row) {
  62   row->widget = gtk_entry_new();
  63   g_signal_connect(row->widget, "changed",
  64                    G_CALLBACK(global_string_entry_changed), row);
  65 }
  66
  67 static const char *global_string_get(struct globals_row *row) {
  68   return gtk_entry_get_text(GTK_ENTRY(row->widget));
  69 }
  70
  71 static void global_string_set(struct globals_row *row, const char *value) {
  72   /* Identify unset and empty lists */
  73   if(!value)
  74     value = "";
  75   /* Skip trivial updates (we'll see one as a consequence of each
  76    * update we make...) */
  77   if(strcmp(gtk_entry_get_text(GTK_ENTRY(row->widget)), value))
  78     gtk_entry_set_text(GTK_ENTRY(row->widget), value);
  79 }
  80
  81 /** @brief String global preference */
  82 static const struct global_handler global_string = {
  83   global_string_init,
  84   global_string_get,
  85   global_string_set,
  86 };
  87
  88 /** @brief Called when the user changes the contents of a string entry */
  89 static void global_boolean_toggled(GtkToggleButton attribute((unused)) *button,
  90                                    gpointer user_data) {
  91   struct globals_row *row = user_data;
  92   globals_row_changed(row);
  93 }
  94
  95 static void global_boolean_init(struct globals_row *row) {
  96   row->widget = gtk_check_button_new();
  97   g_signal_connect(row->widget, "toggled",
  98                    G_CALLBACK(global_boolean_toggled), row);
  99 }
 100
 101 static const char *global_boolean_get(struct globals_row *row) {
 102   return gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(row->widget)) ? "yes" : "no";
 103 }
 104
 105 static void global_boolean_set(struct globals_row *row, const char *value) {
 106   gboolean new_state = !(value && strcmp(value, "yes"));
 107   if(new_state != gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(row->widget)))
 108     gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(row->widget), new_state);
 109 }
 110
 111 /** @brief Boolean global preference */
 112 static const struct global_handler global_boolean = {
 113   global_boolean_init,
 114   global_boolean_get,
 115   global_boolean_set,
 116 };
 117
 118 /** @brief Table of global preferences */
 119 static struct globals_row globals_rows[] = {
 120   { "Required tags", "required-tags", NULL, &global_string, 0 },
 121   { "Prohibited tags", "prohibited-tags", NULL, &global_string, 0 },
 122   { "Playing", "playing", NULL, &global_boolean, 0 },
 123   { "Random play", "random-play", NULL, &global_boolean, 0 },
 124 };
 125 #define NGLOBALS (sizeof globals_rows / sizeof *globals_rows)
 126
 127 /** @brief Buttons for globals popup */
 128 static struct button globals_buttons[] = {
 129   {
 130     .stock = GTK_STOCK_CLOSE,
 131     .clicked = globals_close,
 132     .tip = "Close window",
 133     .pack = gtk_box_pack_end,
 134   },
 135 };
 136 #define NGLOBALS_BUTTONS (sizeof globals_buttons / sizeof *globals_buttons)
 137
 138 static void globals_close(GtkButton attribute((unused)) *button,
 139                          gpointer attribute((unused)) userdata) {
 140   gtk_widget_destroy(globals_window);
 141 }
 142
 143 /** @brief Called with the latest setting for a row */
 144 static void globals_get_completed(void *v, const char *err,
 145                                  const char *value) {
 146   if(err)
 147     popup_protocol_error(0, err);
 148   else if(globals_window) {
 149     struct globals_row *row = v;
 150     row->handler->set(row, value);
 151     row->initialized = 1;
 152   }
 153 }
 154
 155 /** @brief Retrieve the latest setting for @p row */
 156 static void globals_get(struct globals_row *row) {
 157   disorder_eclient_get_global(client, globals_get_completed, row->pref, row);
 158 }
 159
 160 static void globals_row_changed(struct globals_row *row) {
 161   if(row->initialized) {
 162     const char *new_value = row->handler->get(row);
 163     if(new_value)
 164       disorder_eclient_set_global(client, NULL, row->pref, new_value, row);
 165     else
 166       disorder_eclient_unset_global(client, NULL, row->pref, row);
 167   }
 168 }
 169
 170 /** @brief Display the globals window */
 171 void popup_globals(void) {
 172   GtkWidget *label, *table, *hbox;
 173   /* Pop up the window if it already exists */
 174   if(globals_window) {
 175     gtk_window_present(GTK_WINDOW(globals_window));
 176     return;
 177   }
 178   /* Create the window */
 179   /* TODO loads of this is very similar to (copied from!) users.c - can we
 180    * de-dupe? */
 181   globals_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 182   gtk_widget_set_style(globals_window, tool_style);
 183   gtk_window_set_title(GTK_WINDOW(globals_window), "Globals");
 184   g_signal_connect(globals_window, "destroy",
 185                    G_CALLBACK(gtk_widget_destroyed), &globals_window);
 186   table = gtk_table_new(NGLOBALS + 1/*rows*/, 2/*cols*/, FALSE/*homogeneous*/);
 187   gtk_widget_set_style(table, tool_style);\
 188
 189   for(size_t n = 0; n < NGLOBALS; ++n) {
 190     globals_rows[n].initialized = 0;
 191     label = gtk_label_new(globals_rows[n].label);
 192     gtk_widget_set_style(label, tool_style);
 193     gtk_misc_set_alignment(GTK_MISC(label), 1/*right*/, 0/*bottom*/);
 194     gtk_table_attach(GTK_TABLE(table), label,
 195                      0, 1,                /* left/right_attach */
 196                      n, n+1,              /* top/bottom_attach */
 197                      GTK_FILL, 0,         /* x/yoptions */
 198                      1, 1);               /* x/ypadding */
 199     globals_rows[n].handler->init(&globals_rows[n]);
 200     gtk_widget_set_style(globals_rows[n].widget, tool_style);
 201     gtk_table_attach(GTK_TABLE(table), globals_rows[n].widget,
 202                      1, 2,                /* left/right_attach */
 203                      n, n+1,              /* top/bottom_attach */
 204                      GTK_FILL, 0,         /* x/yoptions */
 205                      1, 1);               /* x/ypadding */
 206     globals_get(&globals_rows[n]);
 207   }
 208   hbox = create_buttons_box(globals_buttons,
 209                             NGLOBALS_BUTTONS,
 210                             gtk_hbox_new(FALSE, 1));
 211   gtk_table_attach_defaults(GTK_TABLE(table), hbox,
 212                             0, 2,                /* left/right_attach */
 213                             NGLOBALS, NGLOBALS+1); /* top/bottom_attach */
 214
 215   gtk_container_add(GTK_CONTAINER(globals_window), frame_widget(table, NULL));
 216   gtk_widget_show_all(globals_window);
 217 }
 218
 219 /** @brief Called when any global pref changes */
 220 static void globals_pref_changed(const char attribute((unused)) *event,
 221                                  void *eventdata,
 222                                  void attribute((unused)) *callbackdata) {
 223   const char *pref = eventdata;
 224   if(!globals_window)
 225     return;                     /* not paying attention */
 226   for(size_t n = 0; n < NGLOBALS; ++n) {
 227     if(!strcmp(pref, globals_rows[n].pref))
 228       globals_get(&globals_rows[n]);
 229   }
 230 }
 231
 232 /** @brief Initialize globals infrastructure */
 233 void globals_init() {
 234   event_register("global-pref", globals_pref_changed, NULL);
 235 }