Made the config directory available to plugins

1 files changed, 58 insertions, 1 deletions

diff --git a/PLUGINS.html b/PLUGINS.html
index de1a2ae9..5098ace6 100644
--- a/PLUGINS.html
+++ b/PLUGINS.html
@@ -513,7 +513,7 @@ the plugin should launch a separate thread to do this.
 </b>
 <!--X1.1.2--></td></tr></table>
 
-<hr><h2>Setup parameters</h2>
+<a name="Setup parameters"><hr><h2>Setup parameters</h2>
 
 <center><i><b>Remember me...</b></i></center><p>
 
@@ -648,6 +648,63 @@ your setup parameters and use that one to copy all parameters with one single st
 (like VDR does with its cSetup class).
 <!--X1.1.1--></td></tr></table>
 
+<!--X1.1.2--><table width=100%><tr><td bgcolor=red>&nbsp;</td><td width=100%>
+<hr><h2>Configuration files</h2>
+
+<center><i><b>I want my own stuff!</b></i></center><p>
+
+There may be situations where a plugin requires configuration files of its own, maybe
+for data that can't be stored in the simple <a href="#Setup parameters">setup parameters</a>
+of VDR, or maybe because it needs to launch other programs that simply need a separate
+configuration file. While the plugin is free to store such files anywhere it
+sees fit, it might be a good idea to put them in a common place, preferably
+where other configuration data already exists. VDR provides the function
+
+<p><table><tr><td bgcolor=#F0F0F0><pre><br>
+const char *ConfigDirectory(const char *PluginName = NULL);
+</pre></td></tr></table><p>
+
+which returns a string containing the directory that VDR uses for its own configuration
+files (defined through the <tt><b>-c</b></tt> option in the call to VDR), extended by
+<tt>"/plugins"</tt>. So assuming the VDR configuration directory is <tt>/video</tt>
+(the default if no <tt><b>-c</b></tt> or <tt><b>-v</b></tt> option is given),
+a call to <tt>ConfigDirectory()</tt> will return <tt>/video/plugins</tt>. The first
+call to <tt>ConfigDirectory()</tt> will automatically make sure that the <tt>plugins</tt>
+subdirectory will exist. If, for some reason, this cannot be achieved, <tt>NULL</tt>
+will be returned.
+<p>
+The additional <tt>plugins</tt> directory is used to keep files from plugins apart
+from those of VDR itself, making sure there will be no name clashes. If a plugin
+needs only one extra configuration file, it is suggested that this file be named
+<tt>name.conf</tt>, where <i>name</i> shall be the name of the plugin.
+<p>
+If a plugin needs more than one such file, it is suggested that the plugin stores
+these in a subdirectory of its own, named after the plugin. To easily get such a name
+the <tt>ConfigDirectory()</tt> function can be given an additional string that will
+be appended to the returned directory name, as in
+
+<p><table><tr><td bgcolor=#F0F0F0><pre><br>
+const char *MyConfigDir = ConfigDirectory(Name());
+</pre></td></tr></table><p>
+
+where <tt>Name()</tt> is the member function of the plugin class that returns the
+plugin's name. Again, VDR will make sure that the requested directory will exist
+(or return <tt>NULL</tt> in case of an error).
+<p>
+<b>
+The returned string is statically allocated and will be overwritten by subsequent
+calls to ConfigDirectory()!
+</b>
+<p>
+The <tt>ConfigDirectory()</tt> function is a static member function of the <tt>cPlugin</tt>
+class. This allows it to be called even from outside any member function of the derived
+plugin class, by writing
+
+<p><table><tr><td bgcolor=#F0F0F0><pre><br>
+const char *MyConfigDir = cPlugin::ConfigDirectory();
+</pre></td></tr></table><p>
+<!--X1.1.2--></td></tr></table>
+
 <a name="Internationalization"><hr><h2>Internationalization</h2>
 
 <center><i><b>Welcome to Babylon!</b></i></center><p>