1 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ |
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2 | /* |
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3 | * Configuration component listener |
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4 | * |
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5 | * Author: |
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6 | * Rodrigo Moya <rodrigo@ximian.com> |
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7 | * |
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8 | * Copyright 2002, Ximian, Inc. |
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9 | */ |
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10 | |
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11 | #include <string.h> |
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12 | #include <gconf/gconf-client.h> |
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13 | #include "e-config-listener.h" |
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14 | |
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15 | #define PARENT_TYPE G_TYPE_OBJECT |
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16 | |
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17 | typedef struct { |
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18 | EConfigListener *cl; |
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19 | guint lid; |
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20 | char *key; |
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21 | GConfValueType type; |
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22 | union { |
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23 | gboolean v_bool; |
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24 | float v_float; |
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25 | long v_long; |
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26 | char *v_str; |
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27 | } value; |
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28 | gboolean used_default; |
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29 | } KeyData; |
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30 | |
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31 | struct _EConfigListenerPrivate { |
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32 | GConfClient *db; |
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33 | GHashTable *keys; |
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34 | }; |
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35 | |
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36 | static void e_config_listener_class_init (EConfigListenerClass *klass); |
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37 | static void e_config_listener_init (EConfigListener *cl, EConfigListenerClass *klass); |
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38 | static void e_config_listener_finalize (GObject *object); |
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39 | |
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40 | static GObjectClass *parent_class = NULL; |
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41 | |
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42 | enum { |
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43 | KEY_CHANGED, |
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44 | LAST_SIGNAL |
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45 | }; |
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46 | |
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47 | static guint config_listener_signals[LAST_SIGNAL]; |
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48 | |
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49 | static void |
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50 | e_config_listener_class_init (EConfigListenerClass *klass) |
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51 | { |
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52 | GObjectClass *object_class = G_OBJECT_CLASS (klass); |
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53 | |
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54 | parent_class = g_type_class_peek_parent (klass); |
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55 | |
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56 | object_class->finalize = e_config_listener_finalize; |
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57 | klass->key_changed = NULL; |
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58 | |
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59 | config_listener_signals[KEY_CHANGED] = |
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60 | g_signal_new ("key_changed", |
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61 | G_TYPE_FROM_CLASS (klass), |
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62 | G_SIGNAL_RUN_FIRST, |
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63 | G_STRUCT_OFFSET (EConfigListenerClass, key_changed), |
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64 | NULL, NULL, |
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65 | g_cclosure_marshal_VOID__STRING, |
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66 | G_TYPE_NONE, 1, G_TYPE_STRING); |
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67 | |
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68 | /* make sure GConf is initialized */ |
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69 | if (!gconf_is_initialized ()) |
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70 | gconf_init (0, NULL, NULL); |
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71 | } |
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72 | |
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73 | static void |
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74 | e_config_listener_init (EConfigListener *cl, EConfigListenerClass *klass) |
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75 | { |
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76 | /* allocate internal structure */ |
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77 | cl->priv = g_new0 (EConfigListenerPrivate, 1); |
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78 | |
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79 | cl->priv->keys = g_hash_table_new (g_str_hash, g_str_equal); |
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80 | cl->priv->db = gconf_client_get_default (); |
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81 | } |
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82 | |
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83 | static void |
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84 | free_key_hash (gpointer key, gpointer value, gpointer user_data) |
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85 | { |
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86 | KeyData *kd = (KeyData *) value; |
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87 | |
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88 | g_return_if_fail (kd != NULL); |
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89 | |
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90 | gconf_client_notify_remove (kd->cl->priv->db, kd->lid); |
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91 | |
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92 | g_free (kd->key); |
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93 | switch (kd->type) { |
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94 | case GCONF_VALUE_STRING : |
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95 | g_free (kd->value.v_str); |
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96 | break; |
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97 | default : |
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98 | break; |
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99 | } |
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100 | |
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101 | g_free (kd); |
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102 | } |
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103 | |
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104 | static void |
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105 | e_config_listener_finalize (GObject *object) |
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106 | { |
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107 | EConfigListener *cl = (EConfigListener *) object; |
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108 | |
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109 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
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110 | |
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111 | g_hash_table_foreach (cl->priv->keys, (GHFunc) free_key_hash, NULL); |
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112 | g_hash_table_destroy (cl->priv->keys); |
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113 | cl->priv->keys = NULL; |
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114 | |
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115 | if (cl->priv->db != NULL) { |
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116 | g_object_unref (G_OBJECT (cl->priv->db)); |
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117 | cl->priv->db = NULL; |
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118 | } |
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119 | |
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120 | g_free (cl->priv); |
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121 | cl->priv = NULL; |
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122 | |
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123 | if (G_OBJECT_CLASS (parent_class)->finalize) |
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124 | (* G_OBJECT_CLASS (parent_class)->finalize) (object); |
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125 | } |
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126 | |
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127 | GType |
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128 | e_config_listener_get_type (void) |
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129 | { |
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130 | static GType type = 0; |
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131 | |
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132 | if (!type) { |
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133 | static const GTypeInfo info = { |
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134 | sizeof (EConfigListenerClass), |
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135 | (GBaseInitFunc) NULL, |
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136 | (GBaseFinalizeFunc) NULL, |
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137 | (GClassInitFunc) e_config_listener_class_init, |
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138 | NULL, |
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139 | NULL, |
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140 | sizeof (EConfigListener), |
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141 | 0, |
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142 | (GInstanceInitFunc) e_config_listener_init |
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143 | }; |
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144 | type = g_type_register_static (PARENT_TYPE, "EConfigListener", &info, 0); |
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145 | } |
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146 | |
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147 | return type; |
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148 | } |
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149 | |
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150 | /** |
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151 | * e_config_listener_new |
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152 | * |
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153 | * Create a new configuration listener, which is an object which |
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154 | * allows to listen for changes in the configuration database. It keeps |
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155 | * an updated copy of all requested configuration entries, so that |
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156 | * access is much quicker and instantaneous. |
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157 | * |
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158 | * Returns: the newly created listener. |
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159 | */ |
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160 | EConfigListener * |
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161 | e_config_listener_new (void) |
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162 | { |
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163 | EConfigListener *cl; |
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164 | |
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165 | cl = g_object_new (E_CONFIG_LISTENER_TYPE, NULL); |
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166 | return cl; |
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167 | } |
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168 | |
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169 | static void |
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170 | property_change_cb (GConfEngine *engine, |
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171 | guint cnxn_id, |
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172 | GConfEntry *entry, |
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173 | gpointer user_data) |
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174 | { |
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175 | KeyData *kd = (KeyData *) user_data; |
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176 | |
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177 | g_return_if_fail (entry != NULL); |
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178 | g_return_if_fail (kd != NULL); |
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179 | |
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180 | /* free previous value */ |
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181 | if (kd->type == GCONF_VALUE_STRING) |
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182 | g_free (kd->value.v_str); |
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183 | |
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184 | /* set new value */ |
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185 | if (entry->value->type == GCONF_VALUE_BOOL) { |
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186 | kd->type = GCONF_VALUE_BOOL; |
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187 | kd->value.v_bool = gconf_value_get_bool (entry->value); |
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188 | } else if (entry->value->type == GCONF_VALUE_FLOAT) { |
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189 | kd->type = GCONF_VALUE_FLOAT; |
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190 | kd->value.v_float = gconf_value_get_float (entry->value); |
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191 | } else if (entry->value->type == GCONF_VALUE_INT) { |
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192 | kd->type = GCONF_VALUE_INT; |
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193 | kd->value.v_long = gconf_value_get_int (entry->value); |
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194 | } else if (entry->value->type == GCONF_VALUE_STRING) { |
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195 | kd->type = GCONF_VALUE_STRING; |
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196 | kd->value.v_str = g_strdup (gconf_value_get_string (entry->value)); |
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197 | } else |
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198 | return; |
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199 | |
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200 | g_signal_emit (G_OBJECT (kd->cl), config_listener_signals[KEY_CHANGED], 0, kd->key); |
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201 | } |
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202 | |
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203 | static KeyData * |
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204 | add_key (EConfigListener *cl, const char *key, GConfValueType type, |
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205 | gpointer value, gboolean used_default) |
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206 | { |
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207 | KeyData *kd; |
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208 | |
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209 | /* add the key to our hash table */ |
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210 | kd = g_new0 (KeyData, 1); |
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211 | kd->cl = cl; |
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212 | kd->key = g_strdup (key); |
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213 | kd->type = type; |
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214 | switch (type) { |
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215 | case GCONF_VALUE_BOOL : |
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216 | memcpy (&kd->value.v_bool, value, sizeof (gboolean)); |
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217 | break; |
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218 | case GCONF_VALUE_FLOAT : |
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219 | memcpy (&kd->value.v_float, value, sizeof (float)); |
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220 | break; |
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221 | case GCONF_VALUE_INT : |
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222 | memcpy (&kd->value.v_long, value, sizeof (long)); |
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223 | break; |
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224 | case GCONF_VALUE_STRING : |
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225 | kd->value.v_str = g_strdup ((const char *) value); |
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226 | break; |
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227 | default : |
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228 | break; |
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229 | } |
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230 | |
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231 | kd->used_default = used_default; |
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232 | |
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233 | /* add the listener for changes */ |
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234 | gconf_client_add_dir (cl->priv->db, key, GCONF_CLIENT_PRELOAD_RECURSIVE, NULL); |
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235 | kd->lid = gconf_client_notify_add (cl->priv->db, key, |
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236 | (GConfClientNotifyFunc) property_change_cb, |
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237 | kd, NULL, NULL); |
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238 | |
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239 | g_hash_table_insert (cl->priv->keys, kd->key, kd); |
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240 | |
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241 | return kd; |
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242 | } |
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243 | |
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244 | gboolean |
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245 | e_config_listener_get_boolean (EConfigListener *cl, const char *key) |
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246 | { |
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247 | return e_config_listener_get_boolean_with_default (cl, key, FALSE, NULL); |
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248 | } |
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249 | |
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250 | gboolean |
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251 | e_config_listener_get_boolean_with_default (EConfigListener *cl, |
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252 | const char *key, |
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253 | gboolean def, |
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254 | gboolean *used_default) |
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255 | { |
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256 | GConfValue *conf_value; |
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257 | gboolean value; |
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258 | KeyData *kd; |
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259 | gpointer orig_key, orig_value; |
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260 | |
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261 | g_return_val_if_fail (E_IS_CONFIG_LISTENER (cl), FALSE); |
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262 | g_return_val_if_fail (key != NULL, FALSE); |
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263 | |
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264 | /* search for the key in our hash table */ |
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265 | if (!g_hash_table_lookup_extended (cl->priv->keys, key, &orig_key, &orig_value)) { |
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266 | /* not found, so retrieve it from the configuration database */ |
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267 | conf_value = gconf_client_get (cl->priv->db, key, NULL); |
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268 | if (conf_value) { |
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269 | value = gconf_value_get_bool (conf_value); |
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270 | kd = add_key (cl, key, GCONF_VALUE_BOOL, &value, FALSE); |
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271 | gconf_value_free (conf_value); |
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272 | |
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273 | if (used_default != NULL) |
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274 | *used_default = FALSE; |
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275 | } else { |
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276 | value = def; |
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277 | kd = add_key (cl, key, GCONF_VALUE_BOOL, &def, TRUE); |
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278 | |
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279 | if (used_default != NULL) |
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280 | *used_default = TRUE; |
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281 | } |
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282 | } else { |
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283 | kd = (KeyData *) orig_value; |
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284 | g_assert (kd != NULL); |
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285 | |
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286 | if (kd->type == GCONF_VALUE_BOOL) { |
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287 | value = kd->value.v_bool; |
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288 | if (used_default != NULL) |
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289 | *used_default = kd->used_default; |
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290 | } else |
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291 | return FALSE; |
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292 | } |
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293 | |
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294 | return value; |
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295 | } |
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296 | |
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297 | float |
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298 | e_config_listener_get_float (EConfigListener *cl, const char *key) |
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299 | { |
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300 | return e_config_listener_get_float_with_default (cl, key, 0.0, NULL); |
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301 | } |
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302 | |
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303 | float |
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304 | e_config_listener_get_float_with_default (EConfigListener *cl, |
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305 | const char *key, |
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306 | float def, |
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307 | gboolean *used_default) |
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308 | { |
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309 | GConfValue *conf_value; |
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310 | float value; |
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311 | KeyData *kd; |
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312 | gpointer orig_key, orig_value; |
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313 | |
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314 | g_return_val_if_fail (E_IS_CONFIG_LISTENER (cl), -1); |
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315 | g_return_val_if_fail (key != NULL, -1); |
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316 | |
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317 | /* search for the key in our hash table */ |
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318 | if (!g_hash_table_lookup_extended (cl->priv->keys, key, &orig_key, &orig_value)) { |
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319 | /* not found, so retrieve it from the configuration database */ |
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320 | conf_value = gconf_client_get (cl->priv->db, key, NULL); |
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321 | if (conf_value) { |
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322 | value = gconf_value_get_float (conf_value); |
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323 | kd = add_key (cl, key, GCONF_VALUE_FLOAT, &value, FALSE); |
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324 | gconf_value_free (conf_value); |
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325 | |
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326 | if (used_default != NULL) |
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327 | *used_default = FALSE; |
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328 | } else { |
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329 | value = def; |
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330 | kd = add_key (cl, key, GCONF_VALUE_FLOAT, &def, TRUE); |
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331 | |
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332 | if (used_default != NULL) |
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333 | *used_default = TRUE; |
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334 | } |
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335 | } else { |
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336 | kd = (KeyData *) orig_value; |
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337 | g_assert (kd != NULL); |
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338 | |
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339 | if (kd->type == GCONF_VALUE_FLOAT) { |
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340 | value = kd->value.v_float; |
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341 | if (used_default != NULL) |
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342 | *used_default = kd->used_default; |
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343 | } else |
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344 | return -1; |
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345 | } |
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346 | |
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347 | return value; |
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348 | } |
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349 | |
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350 | long |
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351 | e_config_listener_get_long (EConfigListener *cl, const char *key) |
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352 | { |
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353 | return e_config_listener_get_long_with_default (cl, key, 0, NULL); |
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354 | } |
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355 | |
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356 | long |
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357 | e_config_listener_get_long_with_default (EConfigListener *cl, |
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358 | const char *key, |
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359 | long def, |
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360 | gboolean *used_default) |
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361 | { |
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362 | GConfValue *conf_value; |
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363 | long value; |
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364 | KeyData *kd; |
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365 | gpointer orig_key, orig_value; |
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366 | |
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367 | g_return_val_if_fail (E_IS_CONFIG_LISTENER (cl), -1); |
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368 | g_return_val_if_fail (key != NULL, -1); |
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369 | |
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370 | /* search for the key in our hash table */ |
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371 | if (!g_hash_table_lookup_extended (cl->priv->keys, key, &orig_key, &orig_value)) { |
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372 | /* not found, so retrieve it from the configuration database */ |
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373 | conf_value = gconf_client_get (cl->priv->db, key, NULL); |
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374 | if (conf_value) { |
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375 | value = gconf_value_get_int (conf_value); |
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376 | kd = add_key (cl, key, GCONF_VALUE_INT, &value, FALSE); |
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377 | gconf_value_free (conf_value); |
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378 | |
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379 | if (used_default != NULL) |
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380 | *used_default = FALSE; |
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381 | } else { |
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382 | value = def; |
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383 | kd = add_key (cl, key, GCONF_VALUE_INT, &def, TRUE); |
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384 | |
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385 | if (used_default != NULL) |
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386 | *used_default = TRUE; |
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387 | } |
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388 | } else { |
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389 | kd = (KeyData *) orig_value; |
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390 | g_assert (kd != NULL); |
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391 | |
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392 | if (kd->type == GCONF_VALUE_INT) { |
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393 | value = kd->value.v_long; |
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394 | if (used_default != NULL) |
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395 | *used_default = kd->used_default; |
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396 | } else |
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397 | return -1; |
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398 | } |
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399 | |
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400 | return value; |
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401 | } |
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402 | |
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403 | char * |
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404 | e_config_listener_get_string (EConfigListener *cl, const char *key) |
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405 | { |
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406 | return e_config_listener_get_string_with_default (cl, key, NULL, NULL); |
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407 | } |
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408 | |
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409 | char * |
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410 | e_config_listener_get_string_with_default (EConfigListener *cl, |
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411 | const char *key, |
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412 | const char *def, |
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413 | gboolean *used_default) |
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414 | { |
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415 | GConfValue *conf_value; |
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416 | char *str; |
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417 | KeyData *kd; |
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418 | gpointer orig_key, orig_value; |
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419 | |
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420 | g_return_val_if_fail (E_IS_CONFIG_LISTENER (cl), NULL); |
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421 | g_return_val_if_fail (key != NULL, NULL); |
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422 | |
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423 | /* search for the key in our hash table */ |
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424 | if (!g_hash_table_lookup_extended (cl->priv->keys, key, &orig_key, &orig_value)) { |
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425 | /* not found, so retrieve it from the configuration database */ |
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426 | conf_value = gconf_client_get (cl->priv->db, key, NULL); |
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427 | if (conf_value) { |
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428 | str = g_strdup (gconf_value_get_string (conf_value)); |
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429 | kd = add_key (cl, key, GCONF_VALUE_STRING, (gpointer) str, FALSE); |
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430 | gconf_value_free (conf_value); |
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431 | |
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432 | if (used_default != NULL) |
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433 | *used_default = FALSE; |
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434 | } else { |
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435 | str = g_strdup (def); |
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436 | kd = add_key (cl, key, GCONF_VALUE_STRING, (gpointer) str, TRUE); |
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437 | |
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438 | if (used_default != NULL) |
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439 | *used_default = TRUE; |
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440 | } |
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441 | } else { |
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442 | kd = (KeyData *) orig_value; |
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443 | g_assert (kd != NULL); |
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444 | |
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445 | if (kd->type == GCONF_VALUE_STRING) { |
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446 | str = g_strdup (kd->value.v_str); |
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447 | if (used_default != NULL) |
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448 | *used_default = kd->used_default; |
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449 | } else |
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450 | return NULL; |
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451 | } |
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452 | |
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453 | return str; |
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454 | } |
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455 | |
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456 | void |
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457 | e_config_listener_set_boolean (EConfigListener *cl, const char *key, gboolean value) |
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458 | { |
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459 | KeyData *kd; |
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460 | GError *err = NULL; |
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461 | |
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462 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
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463 | g_return_if_fail (key != NULL); |
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464 | |
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465 | /* check that the value is not the same */ |
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466 | if (value == e_config_listener_get_boolean_with_default (cl, key, 0, NULL)) |
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467 | return; |
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468 | |
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469 | gconf_client_set_bool (cl->priv->db, key, value, &err); |
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470 | if (err) { |
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471 | g_warning ("e_config_listener_set_bool: %s", err->message); |
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472 | g_error_free (err); |
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473 | } else { |
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474 | /* update the internal copy */ |
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475 | kd = g_hash_table_lookup (cl->priv->keys, key); |
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476 | if (kd) |
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477 | kd->value.v_bool = value; |
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478 | } |
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479 | } |
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480 | |
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481 | void |
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482 | e_config_listener_set_float (EConfigListener *cl, const char *key, float value) |
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483 | { |
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484 | KeyData *kd; |
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485 | GError *err = NULL; |
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486 | |
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487 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
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488 | g_return_if_fail (key != NULL); |
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489 | |
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490 | /* check that the value is not the same */ |
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491 | if (value == e_config_listener_get_float_with_default (cl, key, 0, NULL)) |
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492 | return; |
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493 | |
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494 | gconf_client_set_float (cl->priv->db, key, value, &err); |
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495 | if (err) { |
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496 | g_warning ("e_config_listener_set_float: %s", err->message); |
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497 | g_error_free (err); |
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498 | } else { |
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499 | /* update the internal copy */ |
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500 | kd = g_hash_table_lookup (cl->priv->keys, key); |
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501 | if (kd) |
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502 | kd->value.v_float = value; |
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503 | } |
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504 | } |
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505 | |
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506 | void |
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507 | e_config_listener_set_long (EConfigListener *cl, const char *key, long value) |
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508 | { |
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509 | KeyData *kd; |
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510 | GError *err = NULL; |
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511 | |
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512 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
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513 | g_return_if_fail (key != NULL); |
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514 | |
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515 | /* check that the value is not the same */ |
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516 | if (value == e_config_listener_get_long_with_default (cl, key, 0, NULL)) |
---|
517 | return; |
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518 | |
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519 | gconf_client_set_int (cl->priv->db, key, value, &err); |
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520 | if (err) { |
---|
521 | g_warning ("e_config_listener_set_long: %s", err->message); |
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522 | g_error_free (err); |
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523 | } else { |
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524 | /* update the internal copy */ |
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525 | kd = g_hash_table_lookup (cl->priv->keys, key); |
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526 | if (kd) |
---|
527 | kd->value.v_long = value; |
---|
528 | } |
---|
529 | } |
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530 | |
---|
531 | void |
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532 | e_config_listener_set_string (EConfigListener *cl, const char *key, const char *value) |
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533 | { |
---|
534 | char *s1, *s2; |
---|
535 | KeyData *kd; |
---|
536 | GError *err = NULL; |
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537 | |
---|
538 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
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539 | g_return_if_fail (key != NULL); |
---|
540 | |
---|
541 | /* check that the value is not the same */ |
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542 | s1 = (char *) value; |
---|
543 | s2 = e_config_listener_get_string_with_default (cl, key, NULL, NULL); |
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544 | if (!strcmp (s1 ? s1 : "", s2 ? s2 : "")) { |
---|
545 | g_free (s2); |
---|
546 | return; |
---|
547 | } |
---|
548 | |
---|
549 | g_free (s2); |
---|
550 | |
---|
551 | gconf_client_set_string (cl->priv->db, key, value, &err); |
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552 | if (err) { |
---|
553 | g_warning ("e_config_listener_set_bool: %s", err->message); |
---|
554 | g_error_free (err); |
---|
555 | } else { |
---|
556 | /* update the internal copy */ |
---|
557 | kd = g_hash_table_lookup (cl->priv->keys, key); |
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558 | if (kd) { |
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559 | g_free (kd->value.v_str); |
---|
560 | kd->value.v_str = g_strdup (value); |
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561 | } |
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562 | } |
---|
563 | } |
---|
564 | |
---|
565 | void |
---|
566 | e_config_listener_remove_value (EConfigListener *cl, const char *key) |
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567 | { |
---|
568 | gpointer orig_key, orig_value; |
---|
569 | |
---|
570 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
---|
571 | g_return_if_fail (key != NULL); |
---|
572 | |
---|
573 | if (g_hash_table_lookup_extended (cl->priv->keys, key, &orig_key, &orig_value)) { |
---|
574 | KeyData *kd = orig_value; |
---|
575 | |
---|
576 | g_hash_table_remove (cl->priv->keys, key); |
---|
577 | g_free (kd->key); |
---|
578 | if (kd->type == GCONF_VALUE_STRING) |
---|
579 | g_free (kd->value.v_str); |
---|
580 | gconf_client_notify_remove (cl->priv->db, kd->lid); |
---|
581 | |
---|
582 | g_free (kd); |
---|
583 | } |
---|
584 | |
---|
585 | gconf_client_unset (cl->priv->db, key, NULL); |
---|
586 | } |
---|
587 | |
---|
588 | void |
---|
589 | e_config_listener_remove_dir (EConfigListener *cl, const char *dir) |
---|
590 | { |
---|
591 | GSList *slist, *iter; |
---|
592 | const gchar *key; |
---|
593 | |
---|
594 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
---|
595 | g_return_if_fail (dir != NULL); |
---|
596 | |
---|
597 | slist = gconf_client_all_entries (cl->priv->db, dir, NULL); |
---|
598 | for (iter = slist; iter != NULL; iter = iter->next) { |
---|
599 | GConfEntry *entry = iter->data; |
---|
600 | |
---|
601 | key = gconf_entry_get_key (entry); |
---|
602 | gconf_client_unset (cl->priv->db, key, NULL); |
---|
603 | gconf_entry_free (entry); |
---|
604 | } |
---|
605 | |
---|
606 | g_slist_free (slist); |
---|
607 | } |
---|