agl-shell: Add split functionality into agl-shell protocolsandbox/mvlad/split-v3

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: Id19a1865baef6e7c9804a281d583a4ac19421851

2 files changed, 100 insertions, 2 deletions

diff --git a/protocol/agl-shell.xml b/protocol/agl-shell.xml
index 84a423c..8f83d7a 100644
--- a/protocol/agl-shell.xml
+++ b/protocol/agl-shell.xml
@@ -22,7 +22,7 @@
     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     DEALINGS IN THE SOFTWARE.
   </copyright>
-  <interface name="agl_shell" version="2">
+  <interface name="agl_shell" version="3">
     <description summary="user interface for Automotive Grade Linux platform">
       Starting with version 2 of the protocol, the client is required to wait
       for the 'bound_ok' or 'bound_fail' events in order to proceed further.
@@ -56,6 +56,7 @@
       <entry name="invalid_argument" value="0"/>
       <entry name="background_exists" value="1"/>
       <entry name="panel_exists" value="2"/>
+      <entry name="split_failed" value="3" since="3"/>
     </enum>
 
     <enum name="edge">
@@ -65,6 +66,15 @@
       <entry name="right" value="3"/>
     </enum>
 
+    <enum name="tile_orientation" since="3">
+      <entry name="none" value="0"/>
+      <entry name="top" value="1"/>
+      <entry name="bottom" value="2"/>
+      <entry name="left" value="3"/>
+      <entry name="right" value="4"/>
+    </enum>
+
+
     <request name="ready">
       <description summary="client is ready to be shown">
         Tell the server that this client is ready to be shown. The server
@@ -156,5 +166,61 @@
       </description>
     </event>
 
+    <request name="set_app_split" since="3">
+      <description summary="set the application split">
+        Request changes the application from the original mode (whatever that
+        might be) to a split, tiled orientation mode defined in the orientation
+        enum. Clients need to implement resizing (meaing handle xdg-shell
+        configure events) for this to work correctly.
+
+        This request only handles a single level of tiling for practical
+        reasons: to keep implementation simple and straight forward. The
+        compositor will ignore requests if there are already two windows
+        present, and will terminate the client's connection with a protocol
+        violation, if it detects more than one tiling level.
+
+        If there's no app_id with the supplied name it will be added to a
+        pending list in order to be applied when an application id gets started.
+        Applications can use this approch if they want to be started in a
+        tiled orientantion position, before creating the xdg-shell toplevel role.
+
+        A none orientation type would make the window go back to the original
+        maximized mode. If two windows are side by side, returning one of them
+        back the original mode would mean the other one will be made hidden
+        and the one doing the request for the none orientation will become
+        the currently active window. A further activation, using activate_app
+        request for the other window would make that one active.
+
+        Closing the window in the tiled orientation state implies that either
+        the background surface will displayed, or in case there was another
+        applications being shown at that time, will make that application be
+        returned to the original, maximized state.
+
+        The tiled orientation could be applied independently of each other,
+        such that a client can transition from one tiled orientation to
+        another. Note that any other window already present would literally
+        take the opposite orientation with the one currently being changed. So
+        tiled orientation modification automatically implies a tile orientation
+        for any other application already present/active at that time.
+
+        In case there's already a client active at that time, it will be
+        attributed automatically the opposite tiled orientation, such that two
+        concurrent applications can be displayed at the same time.
+
+        The orientation tiles can not be combined, and only state at a time
+        can be active. Only horizontal and vertical tiling is possible.
+
+        Input focus is being delivered to the last started/activated window, such
+        that users can cycle between that one or the other, assumes there's
+        another window in the first place.
+
+        See xdg_toplevel.set_app_id from the xdg-shell protocol for a
+        description of app_id.
+      </description>
+      <arg name="app_id" type="string"/>
+      <arg name="orientation" type="uint" enum="tile_orientation"/>
+      <arg name="output" type="object" interface="wl_output"/>
+    </request>
+
   </interface>
 </protocol>
diff --git a/src/shell.c b/src/shell.c
index 913174f..d001e7c 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -1287,12 +1287,44 @@ shell_destroy(struct wl_client *client, struct wl_resource *res)
 {
 }
 
+static void
+_ivi_set_pending_desktop_surface_split(struct wl_resource *output,
+				       const char *app_id, uint32_t orientation)
+{
+	weston_log("%s() added split surface for app_id '%s' with "
+		"orientation %d to pending\n", __func__, app_id, orientation);
+}
+
+static
+void shell_set_app_split(struct wl_client *client, struct wl_resource *res,
+			 const char *app_id, uint32_t orientation,
+			 struct wl_resource *output)
+{
+	struct ivi_surface *surf;
+	struct ivi_compositor *ivi = wl_resource_get_user_data(res);
+
+	if (!app_id)
+		return;
+
+	/* add it as pending until */
+	surf = ivi_find_app(ivi, app_id);
+	if (!surf) {
+		_ivi_set_pending_desktop_surface_split(output, app_id, orientation);
+		return;
+	}
+
+	/* otherwise, take actions now */
+	weston_log("%s() added split surface for app_id '%s' with orientation %d\n",
+			__func__, app_id, orientation);
+}
+
 static const struct agl_shell_interface agl_shell_implementation = {
 	.destroy = shell_destroy,
 	.ready = shell_ready,
 	.set_background = shell_set_background,
 	.set_panel = shell_set_panel,
 	.activate_app = shell_activate_app,
+	.set_app_split = shell_set_app_split,
 };
 
 static void
@@ -1517,7 +1549,7 @@ int
 ivi_shell_create_global(struct ivi_compositor *ivi)
 {
 	ivi->agl_shell = wl_global_create(ivi->compositor->wl_display,
-					  &agl_shell_interface, 2,
+					  &agl_shell_interface, 3,
 					  ivi, bind_agl_shell);
 	if (!ivi->agl_shell) {
 		weston_log("Failed to create wayland global.\n");