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 | #ifdef HAVE_CONFIG_H |
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12 | #include <config.h> |
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13 | #endif |
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14 | |
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15 | #include <gtk/gtksignal.h> |
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16 | #include <gtk/gtktypeutils.h> |
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17 | #include <bonobo/bonobo-exception.h> |
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18 | #include <bonobo/bonobo-event-source.h> |
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19 | #include <bonobo/bonobo-moniker-util.h> |
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20 | #include <bonobo/bonobo-object.h> |
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21 | #include "e-config-listener.h" |
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22 | |
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23 | #define PARENT_TYPE GTK_TYPE_OBJECT |
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24 | |
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25 | typedef struct { |
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26 | EConfigListener *cl; |
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27 | Bonobo_EventSource_ListenerId lid; |
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28 | char *key; |
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29 | GtkFundamentalType type; |
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30 | union { |
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31 | gboolean v_bool; |
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32 | float v_float; |
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33 | long v_long; |
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34 | char *v_str; |
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35 | } value; |
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36 | gboolean used_default; |
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37 | } KeyData; |
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38 | |
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39 | struct _EConfigListenerPrivate { |
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40 | Bonobo_ConfigDatabase db; |
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41 | GHashTable *keys; |
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42 | }; |
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43 | |
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44 | static void e_config_listener_class_init (EConfigListenerClass *klass); |
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45 | static void e_config_listener_init (EConfigListener *cl); |
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46 | static void e_config_listener_destroy (GtkObject *object); |
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47 | |
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48 | static GtkObjectClass *parent_class = NULL; |
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49 | |
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50 | enum { |
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51 | KEY_CHANGED, |
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52 | LAST_SIGNAL |
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53 | }; |
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54 | |
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55 | static guint config_listener_signals[LAST_SIGNAL]; |
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56 | |
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57 | static void |
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58 | e_config_listener_class_init (EConfigListenerClass *klass) |
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59 | { |
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60 | GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass); |
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61 | |
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62 | parent_class = gtk_type_class (PARENT_TYPE); |
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63 | |
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64 | object_class->destroy = e_config_listener_destroy; |
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65 | klass->key_changed = NULL; |
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66 | |
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67 | config_listener_signals[KEY_CHANGED] = |
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68 | gtk_signal_new ("key_changed", |
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69 | GTK_RUN_FIRST, |
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70 | object_class->type, |
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71 | GTK_SIGNAL_OFFSET (EConfigListenerClass, key_changed), |
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72 | gtk_marshal_NONE__STRING, |
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73 | GTK_TYPE_NONE, 1, GTK_TYPE_STRING); |
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74 | gtk_object_class_add_signals (object_class, config_listener_signals, LAST_SIGNAL); |
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75 | } |
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76 | |
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77 | static void |
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78 | e_config_listener_init (EConfigListener *cl) |
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79 | { |
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80 | CORBA_Environment ev; |
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81 | |
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82 | /* allocate internal structure */ |
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83 | cl->priv = g_new0 (EConfigListenerPrivate, 1); |
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84 | |
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85 | cl->priv->keys = g_hash_table_new (g_str_hash, g_str_equal); |
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86 | |
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87 | /* activate the configuration database */ |
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88 | CORBA_exception_init (&ev); |
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89 | cl->priv->db = bonobo_get_object ("wombat:", "Bonobo/ConfigDatabase", &ev); |
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90 | |
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91 | if (BONOBO_EX (&ev) || cl->priv->db == CORBA_OBJECT_NIL) { |
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92 | CORBA_exception_free (&ev); |
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93 | cl->priv->db = CORBA_OBJECT_NIL; |
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94 | } |
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95 | } |
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96 | |
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97 | static void |
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98 | free_key_hash (gpointer key, gpointer value, gpointer user_data) |
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99 | { |
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100 | KeyData *kd = (KeyData *) value; |
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101 | |
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102 | g_return_if_fail (kd != NULL); |
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103 | |
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104 | bonobo_event_source_client_remove_listener (kd->cl->priv->db, kd->lid, NULL); |
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105 | |
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106 | g_free (kd->key); |
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107 | switch (kd->type) { |
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108 | case GTK_TYPE_STRING : |
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109 | g_free (kd->value.v_str); |
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110 | break; |
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111 | default : |
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112 | break; |
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113 | } |
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114 | |
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115 | g_free (kd); |
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116 | } |
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117 | |
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118 | static void |
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119 | e_config_listener_destroy (GtkObject *object) |
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120 | { |
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121 | EConfigListener *cl = (EConfigListener *) object; |
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122 | |
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123 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
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124 | |
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125 | g_hash_table_foreach (cl->priv->keys, (GHFunc) free_key_hash, NULL); |
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126 | g_hash_table_destroy (cl->priv->keys); |
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127 | cl->priv->keys = NULL; |
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128 | |
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129 | if (cl->priv->db != CORBA_OBJECT_NIL) { |
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130 | bonobo_object_release_unref (cl->priv->db, NULL); |
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131 | cl->priv->db = CORBA_OBJECT_NIL; |
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132 | } |
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133 | |
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134 | g_free (cl->priv); |
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135 | cl->priv = NULL; |
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136 | |
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137 | if (GTK_OBJECT_CLASS (parent_class)->destroy) |
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138 | (* GTK_OBJECT_CLASS (parent_class)->destroy) (object); |
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139 | } |
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140 | |
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141 | GtkType |
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142 | e_config_listener_get_type (void) |
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143 | { |
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144 | static GtkType type = 0; |
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145 | |
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146 | if (!type) { |
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147 | static const GtkTypeInfo info = { |
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148 | "EConfigListener", |
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149 | sizeof (EConfigListener), |
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150 | sizeof (EConfigListenerClass), |
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151 | (GtkClassInitFunc) e_config_listener_class_init, |
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152 | (GtkObjectInitFunc) e_config_listener_init, |
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153 | NULL, /* reserved_1 */ |
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154 | NULL, /* reserved_2 */ |
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155 | (GtkClassInitFunc) NULL |
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156 | }; |
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157 | |
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158 | type = gtk_type_unique (PARENT_TYPE, &info); |
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159 | } |
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160 | |
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161 | return type; |
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162 | } |
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163 | |
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164 | /** |
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165 | * e_config_listener_new |
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166 | * |
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167 | * Create a new configuration listener, which is an object which |
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168 | * allows to listen for changes in the configuration database. It keeps |
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169 | * an updated copy of all requested configuration entries, so that |
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170 | * access is much quicker and instantaneous. |
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171 | * |
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172 | * Returns: the newly created listener. |
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173 | */ |
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174 | EConfigListener * |
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175 | e_config_listener_new (void) |
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176 | { |
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177 | EConfigListener *cl; |
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178 | |
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179 | cl = gtk_type_new (E_CONFIG_LISTENER_TYPE); |
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180 | return cl; |
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181 | } |
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182 | |
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183 | static void |
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184 | property_change_cb (BonoboListener *listener, |
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185 | char *event_name, |
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186 | CORBA_any *any, |
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187 | CORBA_Environment *ev, |
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188 | gpointer user_data) |
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189 | { |
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190 | KeyData *kd = (KeyData *) user_data; |
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191 | |
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192 | g_return_if_fail (any != NULL); |
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193 | g_return_if_fail (kd != NULL); |
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194 | |
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195 | /* free previous value */ |
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196 | if (kd->type == GTK_TYPE_STRING) |
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197 | g_free (kd->value.v_str); |
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198 | |
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199 | /* set new value */ |
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200 | if (bonobo_arg_type_is_equal (any->_type, BONOBO_ARG_BOOLEAN, NULL)) { |
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201 | kd->type = GTK_TYPE_BOOL; |
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202 | kd->value.v_bool = BONOBO_ARG_GET_BOOLEAN (any); |
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203 | } else if (bonobo_arg_type_is_equal (any->_type, BONOBO_ARG_FLOAT, NULL)) { |
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204 | kd->type = GTK_TYPE_FLOAT; |
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205 | kd->value.v_float = BONOBO_ARG_GET_FLOAT (any); |
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206 | } else if (bonobo_arg_type_is_equal (any->_type, BONOBO_ARG_LONG, NULL)) { |
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207 | kd->type = GTK_TYPE_LONG; |
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208 | kd->value.v_long = BONOBO_ARG_GET_LONG (any); |
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209 | } else if (bonobo_arg_type_is_equal (any->_type, BONOBO_ARG_STRING, NULL)) { |
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210 | kd->type = GTK_TYPE_STRING; |
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211 | kd->value.v_str = g_strdup (BONOBO_ARG_GET_STRING (any)); |
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212 | } else |
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213 | return; |
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214 | |
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215 | gtk_signal_emit (GTK_OBJECT (kd->cl), config_listener_signals[KEY_CHANGED], kd->key); |
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216 | } |
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217 | |
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218 | static KeyData * |
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219 | add_key (EConfigListener *cl, const char *key, GtkFundamentalType type, |
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220 | gpointer value, gboolean used_default) |
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221 | { |
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222 | KeyData *kd; |
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223 | char *event_name; |
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224 | char *ch; |
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225 | CORBA_Environment ev; |
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226 | |
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227 | /* add the key to our hash table */ |
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228 | kd = g_new0 (KeyData, 1); |
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229 | kd->cl = cl; |
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230 | kd->key = g_strdup (key); |
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231 | kd->type = type; |
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232 | switch (type) { |
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233 | case GTK_TYPE_BOOL : |
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234 | memcpy (&kd->value.v_bool, value, sizeof (gboolean)); |
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235 | break; |
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236 | case GTK_TYPE_FLOAT : |
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237 | memcpy (&kd->value.v_float, value, sizeof (float)); |
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238 | break; |
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239 | case GTK_TYPE_LONG : |
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240 | memcpy (&kd->value.v_long, value, sizeof (long)); |
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241 | break; |
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242 | case GTK_TYPE_STRING : |
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243 | kd->value.v_str = (char *) value; |
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244 | break; |
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245 | default : |
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246 | break; |
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247 | } |
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248 | |
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249 | kd->used_default = used_default; |
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250 | |
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251 | /* add the listener for changes */ |
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252 | event_name = g_strdup_printf ("=Bonobo/ConfigDatabase:change%s", |
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253 | kd->key); |
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254 | ch = strrchr (event_name, '/'); |
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255 | if (ch) |
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256 | *ch = ':'; |
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257 | |
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258 | CORBA_exception_init (&ev); |
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259 | kd->lid = bonobo_event_source_client_add_listener ( |
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260 | cl->priv->db, |
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261 | property_change_cb, |
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262 | event_name, |
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263 | &ev, kd); |
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264 | if (BONOBO_EX (&ev)) { |
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265 | CORBA_exception_free (&ev); |
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266 | g_free (event_name); |
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267 | free_key_hash (kd->key, kd, NULL); |
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268 | return NULL; |
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269 | } |
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270 | |
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271 | g_hash_table_insert (cl->priv->keys, kd->key, kd); |
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272 | |
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273 | CORBA_exception_free (&ev); |
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274 | g_free (event_name); |
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275 | |
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276 | return kd; |
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277 | } |
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278 | |
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279 | gboolean |
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280 | e_config_listener_get_boolean_with_default (EConfigListener *cl, |
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281 | const char *key, |
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282 | gboolean def, |
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283 | gboolean *used_default) |
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284 | { |
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285 | gboolean value; |
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286 | KeyData *kd; |
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287 | gboolean d; |
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288 | gpointer orig_key, orig_value; |
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289 | |
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290 | g_return_val_if_fail (E_IS_CONFIG_LISTENER (cl), FALSE); |
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291 | g_return_val_if_fail (key != NULL, FALSE); |
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292 | |
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293 | /* search for the key in our hash table */ |
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294 | if (!g_hash_table_lookup_extended (cl->priv->keys, key, &orig_key, &orig_value)) { |
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295 | /* not found, so retrieve it from the configuration database */ |
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296 | value = bonobo_config_get_boolean_with_default (cl->priv->db, key, def, &d); |
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297 | kd = add_key (cl, key, GTK_TYPE_BOOL, &value, d); |
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298 | |
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299 | if (used_default != NULL) |
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300 | *used_default = d; |
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301 | } else { |
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302 | kd = (KeyData *) orig_value; |
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303 | g_assert (kd != NULL); |
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304 | |
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305 | if (kd->type == GTK_TYPE_BOOL) { |
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306 | value = kd->value.v_bool; |
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307 | if (used_default != NULL) |
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308 | *used_default = kd->used_default; |
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309 | } else |
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310 | return FALSE; |
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311 | } |
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312 | |
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313 | return value; |
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314 | } |
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315 | |
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316 | float |
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317 | e_config_listener_get_float_with_default (EConfigListener *cl, |
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318 | const char *key, |
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319 | float def, |
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320 | gboolean *used_default) |
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321 | { |
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322 | float value; |
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323 | KeyData *kd; |
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324 | gboolean d; |
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325 | gpointer orig_key, orig_value; |
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326 | |
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327 | g_return_val_if_fail (E_IS_CONFIG_LISTENER (cl), -1); |
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328 | g_return_val_if_fail (key != NULL, -1); |
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329 | |
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330 | /* search for the key in our hash table */ |
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331 | if (!g_hash_table_lookup_extended (cl->priv->keys, key, &orig_key, &orig_value)) { |
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332 | /* not found, so retrieve it from the configuration database */ |
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333 | value = bonobo_config_get_float_with_default (cl->priv->db, key, def, &d); |
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334 | kd = add_key (cl, key, GTK_TYPE_FLOAT, &value, d); |
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335 | |
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336 | if (used_default != NULL) |
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337 | *used_default = d; |
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338 | } else { |
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339 | kd = (KeyData *) orig_value; |
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340 | g_assert (kd != NULL); |
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341 | |
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342 | if (kd->type == GTK_TYPE_FLOAT) { |
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343 | value = kd->value.v_float; |
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344 | if (used_default != NULL) |
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345 | *used_default = kd->used_default; |
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346 | } else |
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347 | return -1; |
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348 | } |
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349 | |
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350 | return value; |
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351 | } |
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352 | |
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353 | long |
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354 | e_config_listener_get_long_with_default (EConfigListener *cl, |
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355 | const char *key, |
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356 | long def, |
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357 | gboolean *used_default) |
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358 | { |
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359 | long value; |
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360 | KeyData *kd; |
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361 | gboolean d; |
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362 | gpointer orig_key, orig_value; |
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363 | |
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364 | g_return_val_if_fail (E_IS_CONFIG_LISTENER (cl), -1); |
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365 | g_return_val_if_fail (key != NULL, -1); |
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366 | |
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367 | /* search for the key in our hash table */ |
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368 | if (!g_hash_table_lookup_extended (cl->priv->keys, key, &orig_key, &orig_value)) { |
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369 | /* not found, so retrieve it from the configuration database */ |
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370 | value = bonobo_config_get_long_with_default (cl->priv->db, key, def, &d); |
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371 | kd = add_key (cl, key, GTK_TYPE_LONG, &value, d); |
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372 | |
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373 | if (used_default != NULL) |
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374 | *used_default = d; |
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375 | } else { |
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376 | kd = (KeyData *) orig_value; |
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377 | g_assert (kd != NULL); |
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378 | |
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379 | if (kd->type == GTK_TYPE_LONG) { |
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380 | value = kd->value.v_long; |
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381 | if (used_default != NULL) |
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382 | *used_default = kd->used_default; |
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383 | } else |
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384 | return -1; |
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385 | } |
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386 | |
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387 | return value; |
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388 | } |
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389 | |
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390 | char * |
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391 | e_config_listener_get_string_with_default (EConfigListener *cl, |
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392 | const char *key, |
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393 | const char *def, |
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394 | gboolean *used_default) |
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395 | { |
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396 | char *str; |
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397 | KeyData *kd; |
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398 | gboolean d; |
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399 | gpointer orig_key, orig_value; |
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400 | |
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401 | g_return_val_if_fail (E_IS_CONFIG_LISTENER (cl), NULL); |
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402 | g_return_val_if_fail (key != NULL, NULL); |
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403 | |
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404 | /* search for the key in our hash table */ |
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405 | if (!g_hash_table_lookup_extended (cl->priv->keys, key, &orig_key, &orig_value)) { |
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406 | /* not found, so retrieve it from the configuration database */ |
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407 | str = bonobo_config_get_string_with_default (cl->priv->db, key, (char *) def, &d); |
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408 | if (str) { |
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409 | kd = add_key (cl, key, GTK_TYPE_STRING, (gpointer) str, d); |
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410 | |
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411 | if (used_default != NULL) |
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412 | *used_default = d; |
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413 | } else |
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414 | return NULL; |
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415 | } else { |
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416 | kd = (KeyData *) orig_value; |
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417 | g_assert (kd != NULL); |
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418 | |
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419 | if (kd->type == GTK_TYPE_STRING) { |
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420 | str = kd->value.v_str; |
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421 | if (used_default != NULL) |
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422 | *used_default = kd->used_default; |
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423 | } else |
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424 | return NULL; |
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425 | } |
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426 | |
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427 | return g_strdup (str); |
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428 | } |
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429 | |
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430 | void |
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431 | e_config_listener_set_boolean (EConfigListener *cl, const char *key, gboolean value) |
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432 | { |
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433 | CORBA_Environment ev; |
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434 | KeyData *kd; |
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435 | |
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436 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
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437 | g_return_if_fail (key != NULL); |
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438 | |
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439 | /* check that the value is not the same */ |
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440 | if (value == e_config_listener_get_boolean_with_default (cl, key, 0, NULL)) |
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441 | return; |
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442 | |
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443 | CORBA_exception_init (&ev); |
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444 | |
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445 | bonobo_config_set_boolean (cl->priv->db, key, value, &ev); |
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446 | if (BONOBO_EX (&ev)) |
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447 | g_warning ("Cannot save config key %s -- %s", key, BONOBO_EX_ID (&ev)); |
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448 | else { |
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449 | /* update the internal copy */ |
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450 | kd = g_hash_table_lookup (cl->priv->keys, key); |
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451 | if (kd) |
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452 | kd->value.v_bool = value; |
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453 | } |
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454 | |
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455 | CORBA_exception_free (&ev); |
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456 | } |
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457 | |
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458 | void |
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459 | e_config_listener_set_float (EConfigListener *cl, const char *key, float value) |
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460 | { |
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461 | CORBA_Environment ev; |
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462 | KeyData *kd; |
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463 | |
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464 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
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465 | g_return_if_fail (key != NULL); |
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466 | |
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467 | /* check that the value is not the same */ |
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468 | if (value == e_config_listener_get_float_with_default (cl, key, 0, NULL)) |
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469 | return; |
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470 | |
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471 | CORBA_exception_init (&ev); |
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472 | |
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473 | bonobo_config_set_float (cl->priv->db, key, value, &ev); |
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474 | if (BONOBO_EX (&ev)) |
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475 | g_warning ("Cannot save config key %s -- %s", key, BONOBO_EX_ID (&ev)); |
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476 | else { |
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477 | /* update the internal copy */ |
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478 | kd = g_hash_table_lookup (cl->priv->keys, key); |
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479 | if (kd) |
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480 | kd->value.v_float = value; |
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481 | } |
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482 | |
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483 | CORBA_exception_free (&ev); |
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484 | } |
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485 | |
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486 | void |
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487 | e_config_listener_set_long (EConfigListener *cl, const char *key, long value) |
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488 | { |
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489 | CORBA_Environment ev; |
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490 | KeyData *kd; |
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491 | |
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492 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
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493 | g_return_if_fail (key != NULL); |
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494 | |
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495 | /* check that the value is not the same */ |
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496 | if (value == e_config_listener_get_long_with_default (cl, key, 0, NULL)) |
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497 | return; |
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498 | |
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499 | CORBA_exception_init (&ev); |
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500 | |
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501 | bonobo_config_set_long (cl->priv->db, key, value, &ev); |
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502 | if (BONOBO_EX (&ev)) |
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503 | g_warning ("Cannot save config key %s -- %s", key, BONOBO_EX_ID (&ev)); |
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504 | else { |
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505 | /* update the internal copy */ |
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506 | kd = g_hash_table_lookup (cl->priv->keys, key); |
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507 | if (kd) |
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508 | kd->value.v_long = value; |
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509 | } |
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510 | |
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511 | CORBA_exception_free (&ev); |
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512 | } |
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513 | |
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514 | void |
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515 | e_config_listener_set_string (EConfigListener *cl, const char *key, const char *value) |
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516 | { |
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517 | CORBA_Environment ev; |
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518 | char *s1, *s2; |
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519 | KeyData *kd; |
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520 | |
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521 | g_return_if_fail (E_IS_CONFIG_LISTENER (cl)); |
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522 | g_return_if_fail (key != NULL); |
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523 | |
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524 | /* check that the value is not the same */ |
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525 | s1 = (char *) value; |
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526 | s2 = e_config_listener_get_string_with_default (cl, key, NULL, NULL); |
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527 | if (!strcmp (s1 ? s1 : "", s2 ? s2 : "")) { |
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528 | g_free (s2); |
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529 | return; |
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530 | } |
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531 | |
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532 | g_free (s2); |
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533 | |
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534 | CORBA_exception_init (&ev); |
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535 | |
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536 | bonobo_config_set_string (cl->priv->db, key, value, &ev); |
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537 | if (BONOBO_EX (&ev)) |
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538 | g_warning ("Cannot save config key %s -- %s", key, BONOBO_EX_ID (&ev)); |
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539 | else { |
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540 | /* update the internal copy */ |
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541 | kd = g_hash_table_lookup (cl->priv->keys, key); |
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542 | if (kd) { |
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543 | g_free (kd->value.v_str); |
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544 | kd->value.v_str = g_strdup (value); |
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545 | } |
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546 | } |
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547 | |
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548 | CORBA_exception_free (&ev); |
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549 | } |
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550 | |
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551 | Bonobo_ConfigDatabase |
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552 | e_config_listener_get_db (EConfigListener *cl) |
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553 | { |
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554 | g_return_val_if_fail (E_IS_CONFIG_LISTENER (cl), CORBA_OBJECT_NIL); |
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555 | return cl->priv->db; |
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556 | } |
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