From 6ba529d5c8fac4d353f9106701a1212b58ee339e Mon Sep 17 00:00:00 2001
From: Ryan Lortie <desrt@desrt.ca>
Date: Sun, 23 Jun 2013 13:31:29 -0400
Subject: [PATCH 3/3] Provide a sample extension interface

...and a polkit action file to go with.
---
 doc/org.mydm.MyDisplayManager.Wallpaper.xml | 40 +++++++++++++++++++++++++++++
 doc/org.mydm.MyDisplayManager.policy        | 14 ++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 doc/org.mydm.MyDisplayManager.Wallpaper.xml
 create mode 100644 doc/org.mydm.MyDisplayManager.policy

diff --git a/doc/org.mydm.MyDisplayManager.Wallpaper.xml b/doc/org.mydm.MyDisplayManager.Wallpaper.xml
new file mode 100644
index 0000000..26a036a
--- /dev/null
+++ b/doc/org.mydm.MyDisplayManager.Wallpaper.xml
@@ -0,0 +1,40 @@
+<node>
+  <interface name="org.mydm.MyDisplayManager.Wallpaper">
+
+    <annotation name="org.freedesktop.Accounts.VendorExtension" value="true"/>
+
+    <!-- defaults to always allowed -->
+    <!--
+    <annotation name="org.freedesktop.Accounts.Authentication.ReadOwn"
+                value="org.mydm.MyDisplayManager.ReadWallpaper"/>
+    <annotation name="org.freedesktop.Accounts.Authentication.ReadAny"
+                value="org.mydm.MyDisplayManager.ReadWallpaper"/>
+    -->
+
+    <!-- defaults to org.freedesktop.accounts.user-administration -->
+    <annotation name="org.freedesktop.Accounts.Authentication.ChangeAny"
+                value="org.mydm.MyDisplayManager.ModifyWallpaper"/>
+
+    <!-- defaults to org.freedesktop.accounts.change-own-user-data -->
+    <!--
+    <annotation name="org.freedesktop.Accounts.Authentication.ChangeOwn"
+                value="org.mydm.MyDisplayManager.ModifyWallpaper"/>
+    -->
+
+    <property name="filename" type="s" access="readwrite"/>
+
+    <property name="display-mode" type="s" access="readwrite">
+      <annotation name="org.freedesktop.Accounts.DefaultValue.String" value="zoom"/>
+    </property>
+
+    <property name="background-color" type="(iii)" access="readwrite">
+      <annotation name="org.freedesktop.Accounts.DefaultValue" value="(0xdd, 0x48, 0x14)"/>
+    </property>
+
+  </interface>
+</node>
+
+<!-- must install file in XDG_DATA_DIRS/dbus-1/interfaces
+     and symlink to it from XDG_DATA_DIRS/accountsservice/interface
+     with the same basename, using a relative path starting '../../dbus-1/interfaces/"
+ -->
diff --git a/doc/org.mydm.MyDisplayManager.policy b/doc/org.mydm.MyDisplayManager.policy
new file mode 100644
index 0000000..14fb229
--- /dev/null
+++ b/doc/org.mydm.MyDisplayManager.policy
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<policyconfig>
+
+        <action id="org.mydm.MyDisplayManager.ModifyWallpaper">
+                <description>Set wallpaper of any user</description>
+                <message>Authentication is required to set another user's wallpaper.</message>
+                <defaults>
+                        <allow_any>auth_admin_keep</allow_any>
+                        <allow_inactive>auth_admin_keep</allow_inactive>
+                        <allow_active>auth_admin_keep</allow_active>
+                </defaults>
+        </action>
+</policyconfig>
-- 
1.8.2.1