api: add function config_option_get_string in plugin API

src/core/wee-config-file.c

@@ -1906,7 +1906,30 @@ config_file_option_value_to_string (struct t_config_option *option,
 }
 
 /*
- * Gets a pointer of an option property.
+ * Gets a string value of an option property.
+ */
+
+const char *
+config_file_option_get_string (struct t_config_option *option,
+                               const char *property)
+{
+    if (!option || !property)
+        return NULL;
+
+    if (string_strcasecmp (property, "name") == 0)
+        return option->name;
+    else if (string_strcasecmp (property, "parent_name") == 0)
+        return option->parent_name;
+    else if (string_strcasecmp (property, "type") == 0)
+        return config_option_type_string[option->type];
+    else if (string_strcasecmp (property, "description") == 0)
+        return option->description;
+
+    return NULL;
+}
+
+/*
+ * Gets a pointer on an option property.
  */
 
 void *

src/core/wee-config-file.h

@@ -264,6 +264,8 @@ extern char *config_file_option_value_to_string (struct t_config_option *option,
                                                  int default_value,
                                                  int add_delimiters,
                                                  int use_colors);
+extern const char *config_file_option_get_string (struct t_config_option *option,
+                                                  const char *property);
 extern void *config_file_option_get_pointer (struct t_config_option *option,
                                              const char *property);
 extern int config_file_option_is_null (struct t_config_option *option);

src/plugins/plugin.c

@@ -728,6 +728,7 @@ plugin_load (const char *filename, int init_plugin, int argc, char **argv)
         new_plugin->config_option_set_null = &config_file_option_set_null;
         new_plugin->config_option_unset = &config_file_option_unset;
         new_plugin->config_option_rename = &config_file_option_rename;
+        new_plugin->config_option_get_string = &config_file_option_get_string;
         new_plugin->config_option_get_pointer = &config_file_option_get_pointer;
         new_plugin->config_option_is_null = &config_file_option_is_null;
         new_plugin->config_option_default_is_null = &config_file_option_default_is_null;

src/plugins/weechat-plugin.h

@@ -59,7 +59,7 @@ struct timeval;
  * please change the date with current one; for a second change at same
  * date, increment the 01, otherwise please keep 01.
  */
-#define WEECHAT_PLUGIN_API_VERSION "20170401-01"
+#define WEECHAT_PLUGIN_API_VERSION "20170530-01"
 
 /* macros for defining plugin infos */
 #define WEECHAT_PLUGIN_NAME(__name)                                     \
@@ -561,6 +561,8 @@ struct t_weechat_plugin
     int (*config_option_unset) (struct t_config_option *option);
     void (*config_option_rename) (struct t_config_option *option,
                                   const char *new_name);
+    const char *(*config_option_get_string) (struct t_config_option *option,
+                                             const char *property);
     void *(*config_option_get_pointer) (struct t_config_option *option,
                                         const char *property);
     int (*config_option_is_null) (struct t_config_option *option);
@@ -1492,6 +1494,8 @@ extern int weechat_plugin_end (struct t_weechat_plugin *plugin);
     (weechat_plugin->config_option_unset)(__option)
 #define weechat_config_option_rename(__option, __new_name)              \
     (weechat_plugin->config_option_rename)(__option, __new_name)
+#define weechat_config_option_get_string(__option, __property)         \
+    (weechat_plugin->config_option_get_string)(__option, __property)
 #define weechat_config_option_get_pointer(__option, __property)         \
     (weechat_plugin->config_option_get_pointer)(__option, __property)
 #define weechat_config_option_is_null(__option)                         \