chiark - git - mdw - disorder/blob - disobedience/filter.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/filter.c
  19  * @brief Track filtering
  20  */
  21
  22 #include "disobedience.h"
  23
  24 static GtkWidget *filtering_window;
  25
  26 static struct filter_row {
  27   const char *label;
  28   const char *pref;
  29   GtkWidget *entry;
  30 } filter_rows[] = {
  31   { "Required tags", "required-tags", NULL },
  32   { "Prohibited tags", "prohibited-tags", NULL },
  33 };
  34 #define NFILTER (sizeof filter_rows / sizeof *filter_rows)
  35
  36 /* Getting values */
  37
  38 /** @brief Called with the latest setting for a row */
  39 static void filter_get_completed(void *v, const char *err,
  40                                  const char *value) {
  41   if(err)
  42     popup_protocol_error(0, err);
  43   else if(filtering_window) {
  44     struct filter_row *row = v;
  45     /* Identify unset and empty lists */
  46     if(!value)
  47       value = "";
  48     /* Skip trivial updates (we'll see one as a consequence of each
  49      * update we make...) */
  50     if(strcmp(gtk_entry_get_text(GTK_ENTRY(row->entry)), value))
  51       gtk_entry_set_text(GTK_ENTRY(row->entry), value);
  52   }
  53 }
  54
  55 /** @brief Retrieve the latest setting for @p row */
  56 static void filter_get(struct filter_row *row) {
  57   disorder_eclient_get_global(client, filter_get_completed, row->pref, row);
  58 }
  59
  60 /** @brief Called when the user changes the contents of some entry */
  61 static void filter_entry_changed(GtkEditable *editable, gpointer user_data) {
  62   struct filter_row *row = user_data;
  63   const char *new_value = gtk_entry_get_text(GTK_ENTRY(editable));
  64   if(*new_value)
  65     disorder_eclient_set_global(client, NULL, row->pref, new_value, row);
  66   else
  67     disorder_eclient_unset_global(client, NULL, row->pref, row);
  68 }
  69
  70 /** @brief Display the filtering window */
  71 void popup_filtering(void) {
  72   GtkWidget *label, *table;
  73   /* Pop up the window if it already exists */
  74   if(filtering_window) {
  75     gtk_window_present(GTK_WINDOW(filtering_window));
  76     return;
  77   }
  78   /* Create the window */
  79   /* TODO loads of this is very similar to (copied from!) users.c - can we
  80    * de-dupe? */
  81   filtering_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  82   gtk_widget_set_style(filtering_window, tool_style);
  83   gtk_window_set_title(GTK_WINDOW(filtering_window), "Filtering");
  84   g_signal_connect(filtering_window, "destroy",
  85                    G_CALLBACK(gtk_widget_destroyed), &filtering_window);
  86   table = gtk_table_new(NFILTER/*rows*/, 2/*cols*/, FALSE/*homogeneous*/);
  87   gtk_widget_set_style(table, tool_style);\
  88
  89   for(size_t n = 0; n < NFILTER; ++n) {
  90     label = gtk_label_new(filter_rows[n].label);
  91     gtk_widget_set_style(label, tool_style);
  92     gtk_misc_set_alignment(GTK_MISC(label), 1/*right*/, 0/*bottom*/);
  93     gtk_table_attach(GTK_TABLE(table), label,
  94                      0, 1,                /* left/right_attach */
  95                      n, n+1,              /* top/bottom_attach */
  96                      GTK_FILL, 0,         /* x/yoptions */
  97                      1, 1);               /* x/ypadding */
  98     filter_rows[n].entry = gtk_entry_new();
  99     gtk_widget_set_style(filter_rows[n].entry, tool_style);
 100     gtk_table_attach(GTK_TABLE(table), filter_rows[n].entry,
 101                      1, 2,                /* left/right_attach */
 102                      n, n+1,              /* top/bottom_attach */
 103                      GTK_FILL, 0,         /* x/yoptions */
 104                      1, 1);               /* x/ypadding */
 105     g_signal_connect(filter_rows[n].entry, "changed",
 106                      G_CALLBACK(filter_entry_changed), &filter_rows[n]);
 107     filter_get(&filter_rows[n]);
 108   }
 109
 110   gtk_container_add(GTK_CONTAINER(filtering_window), frame_widget(table, NULL));
 111   gtk_widget_show_all(filtering_window);
 112 }
 113
 114 /** @brief Called when any global pref changes */
 115 static void filtering_global_pref_changed(const char *event,
 116                                           void *eventdata,
 117                                           void *callbackdata) {
 118   const char *pref = eventdata;
 119   if(!filtering_window)
 120     return;                     /* not paying attention */
 121   for(size_t n = 0; n < NFILTER; ++n) {
 122     if(!strcmp(pref, filter_rows[n].pref))
 123       filter_get(&filter_rows[n]);
 124   }
 125 }
 126
 127 /** @brief Initialize filtering infrastructure */
 128 void filtering_init() {
 129   event_register("global-pref", filtering_global_pref_changed, NULL);
 130 }