[PATCH wayland-protocols v3] Add screensaver idle inhibitor protocol

[Bryce Harrington]

This interface allows disabling of screensaver/screenblanking on a
per-surface basis.  As long as the surface remains visible and
non-occluded it blocks the screensaver, etc. from activating on the
output(s) that the surface is visible on.

To uninhibit, simply destroy the inhibitor object.

Signed-off-by: Bryce Harrington <bryce at bryceharrington.org>
---

v2:
 + Rename protocol to idle-inhibit
v3:
 + Added a destructor for the idle manager
 + Changed sub-surface behavior to inherit idle from parent surface
 + Various wording changes suggested by pq


 Makefile.am                                        |  1 +
 unstable/idle-inhibit/README                       |  4 ++
 unstable/idle-inhibit/idle-inhibit-unstable-v1.xml | 84 ++++++++++++++++++++++
 3 files changed, 89 insertions(+)
 create mode 100644 unstable/idle-inhibit/README
 create mode 100644 unstable/idle-inhibit/idle-inhibit-unstable-v1.xml

diff --git a/Makefile.am b/Makefile.am
index 71d2632..de691db 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -8,6 +8,7 @@ unstable_protocols =								\
 	unstable/relative-pointer/relative-pointer-unstable-v1.xml		\
 	unstable/pointer-constraints/pointer-constraints-unstable-v1.xml	\
 	unstable/tablet/tablet-unstable-v1.xml			                \
+	unstable/idle-inhibit/idle-inhibit-unstable-v1.xml			\
 	$(NULL)
 
 stable_protocols =								\
diff --git a/unstable/idle-inhibit/README b/unstable/idle-inhibit/README
new file mode 100644
index 0000000..396e871
--- /dev/null
+++ b/unstable/idle-inhibit/README
@@ -0,0 +1,4 @@
+Screensaver inhibition protocol
+
+Maintainers:
+Bryce Harrington <bryce at osg.samsung.com>
diff --git a/unstable/idle-inhibit/idle-inhibit-unstable-v1.xml b/unstable/idle-inhibit/idle-inhibit-unstable-v1.xml
new file mode 100644
index 0000000..af3a911
--- /dev/null
+++ b/unstable/idle-inhibit/idle-inhibit-unstable-v1.xml
@@ -0,0 +1,84 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="idle_inhibit_unstable_v1">
+
+  <copyright>
+    Copyright © 2015 Samsung Electronics Co., Ltd
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice (including the next
+    paragraph) shall be included in all copies or substantial portions of the
+    Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+  </copyright>
+
+  <interface name="zwp_idle_inhibit_manager_v1" version="1">
+    <description summary="control behavior when display idles">
+      This interface permits inhibiting the idle behavior such as screen
+      blanking, locking, and screensaving.  The client binds the idle manager
+      globally, then creates idle-inhibitor objects for each surface.
+
+      Warning! The protocol described in this file is experimental and
+      backward incompatible changes may be made. Backward compatible changes
+      may be added together with the corresponding interface version bump.
+      Backward incompatible changes are done by bumping the version number in
+      the protocol and interface names and resetting the interface version.
+      Once the protocol is to be declared stable, the 'z' prefix and the
+      version number in the protocol and interface names are removed and the
+      interface version number is reset.
+    </description>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the idle inhibitor object">
+	This destroys the inhibit manager.
+      </description>
+    </request>
+
+    <request name="create_inhibitor">
+      <description summary="create a new inhibitor object">
+	Create a new inhibitor object associated with the given surface.
+      </description>
+      <arg name="id" type="new_id" interface="zwp_idle_inhibitor_v1"/>
+      <arg name="surface" type="object" interface="wl_surface"
+	   summary="the surface that inhibits the idle behavior"/>
+    </request>
+
+  </interface>
+
+  <interface name="zwp_idle_inhibitor_v1" version="1">
+    <description summary="context object for inhibiting idle behavior">
+      An idle inhibitor prevents the output that the associated surface is
+      visible on from being blanked, dimmed, locked, set to power save, or
+      otherwise obscured due to lack of user interaction.  Any active
+      screensaver processes are also temporarily blocked from displaying.
+
+      If the surface is destroyed, unmapped, becomes occluded or otherwise
+      loses visibility, the screen behavior is restored to normal; if the
+      surface subsequently regains visibility the inhibitor takes effect once
+      again.
+
+      Note that in the case of a compound window (a surface with
+      sub-surfaces), the inhibitor effects should be inherited from the top
+      level surface.
+    </description>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the idle inhibitor object">
+	This removes the inhibitor effect from the associated wl_surface.
+      </description>
+    </request>
+
+  </interface>
+</protocol>
-- 
1.9.1