protocol: agl-shell-desktop: Send notification for application state change

The events are sent straight after the activation took place. The state
changes are the surface role (for instance, pop-up) and the
activate/de-activate type of event. With that information there's also a
string type of data which can be used as easy way to forward data.

Note that this isn't the proper way for applications to
communicate with each other, but merely as a convenient way to pass data
from one application to another. In order to hang-off the data, the
'activate_app' request also got an additional argument which is relayed
back with the event.

Bug-AGL: SPEC-3269

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: I0c9be86f6ff227b59271cac1c060563b5aac9b6c

4 files changed, 67 insertions, 4 deletions

diff --git a/protocol/agl-shell-desktop.xml b/protocol/agl-shell-desktop.xml
index 6d53f92..05a3725 100644
--- a/protocol/agl-shell-desktop.xml
+++ b/protocol/agl-shell-desktop.xml
@@ -37,6 +37,11 @@
       <entry name="fullscreen" value="1"/>
     </enum>
 
+    <enum name="app_state">
+      <entry name="activated" value="0"/>
+      <entry name="deactivated" value="1"/>
+    </enum>
+
     <event name="application">
       <description summary="advertise application id">
         The compositor may choose to advertise one or more application ids which
@@ -58,6 +63,7 @@
         description of app_id.
       </description>
       <arg name="app_id" type="string"/>
+      <arg name="app_data" type="string" allow-null="true"/>
       <arg name="output" type="object" interface="wl_output"/>
     </request>
 
@@ -92,5 +98,16 @@
       </description>
       <arg name="app_id" type="string"/>
     </request>
+
+    <event name="state_app">
+      <description summary="event sent when application has suffered state modification">
+        Notifies application(s) when other application have suffered state modifications.
+      </description>
+      <arg name="app_id" type="string"/>
+      <arg name="app_data" type="string" allow-null="true"/>
+      <arg name="state" type="uint" enum="app_state"/>
+      <arg name="role" type="uint" enum="app_role"/>
+    </event>
+
   </interface>
 </protocol>
diff --git a/src/ivi-compositor.h b/src/ivi-compositor.h
index b76da85..91b5340 100644
--- a/src/ivi-compositor.h
+++ b/src/ivi-compositor.h
@@ -273,6 +273,9 @@ ivi_layout_set_position(struct ivi_surface *surface,
 			int32_t x, int32_t y,
 			int32_t width, int32_t height);
 
+struct ivi_surface *
+ivi_find_app(struct ivi_compositor *ivi, const char *app_id);
+
 void
 ivi_layout_commit(struct ivi_compositor *ivi);
 
diff --git a/src/layout.c b/src/layout.c
index 6f6c763..629290f 100644
--- a/src/layout.c
+++ b/src/layout.c
@@ -32,6 +32,8 @@
 #include <libweston/libweston.h>
 #include <libweston-desktop/libweston-desktop.h>
 
+#include "agl-shell-desktop-server-protocol.h"
+
 #define AGL_COMP_DEBUG
 
 static void
@@ -165,7 +167,7 @@ ivi_layout_init(struct ivi_compositor *ivi, struct ivi_output *output)
 		   output->area.x, output->area.y);
 }
 
-static struct ivi_surface *
+struct ivi_surface *
 ivi_find_app(struct ivi_compositor *ivi, const char *app_id)
 {
 	struct ivi_surface *surf;
@@ -470,7 +472,6 @@ ivi_layout_activate(struct ivi_output *output, const char *app_id)
 		/* force repaint of the entire output */
 		weston_output_damage(output->output);
 	}
-
 }
 
 static struct ivi_output *
diff --git a/src/shell.c b/src/shell.c
index 768b6d2..aa63b86 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -509,6 +509,29 @@ shell_set_panel(struct wl_client *client,
 	weston_desktop_surface_set_size(dsurface, width, height);
 }
 
+
+static void
+shell_advertise_app_state(struct ivi_compositor *ivi, const char *app_id,
+			  const char *data, uint32_t app_state)
+{
+	struct desktop_client *dclient;
+	uint32_t app_role;
+	struct ivi_surface *surf = ivi_find_app(ivi, app_id);
+
+	/* FIXME: should queue it here and see when binding agl-shell-desktop
+	 * if there are any to be sent */
+	if (!surf)
+		return;
+
+	app_role = surf->role;
+	if (app_role == IVI_SURFACE_ROLE_POPUP)
+		app_role = AGL_SHELL_DESKTOP_APP_ROLE_POPUP;
+
+	wl_list_for_each(dclient, &ivi->desktop_clients, link)
+		agl_shell_desktop_send_state_app(dclient->resource, app_id,
+						 data, app_state, app_role);
+}
+
 static void
 shell_activate_app(struct wl_client *client,
 		   struct wl_resource *shell_res,
@@ -523,12 +546,31 @@ shell_activate_app(struct wl_client *client,
 }
 
 static void
+shell_desktop_activate_app(struct wl_client *client,
+			   struct wl_resource *shell_res,
+			   const char *app_id, const char *data,
+			   struct wl_resource *output_res)
+{
+	struct weston_head *head = weston_head_from_resource(output_res);
+	struct weston_output *woutput = weston_head_get_output(head);
+	struct ivi_output *output = to_ivi_output(woutput);
+
+	ivi_layout_activate(output, app_id);
+	shell_advertise_app_state(output->ivi, app_id,
+				  data, AGL_SHELL_DESKTOP_APP_STATE_ACTIVATED);
+}
+
+static void
 shell_deactivate_app(struct wl_client *client,
 		   struct wl_resource *shell_res,
 		   const char *app_id)
 {
 	struct desktop_client *dclient = wl_resource_get_user_data(shell_res);
-	ivi_layout_deactivate(dclient->ivi, app_id);
+	struct ivi_compositor *ivi = dclient->ivi;
+
+	ivi_layout_deactivate(ivi, app_id);
+	shell_advertise_app_state(ivi, app_id,
+				  NULL, AGL_SHELL_DESKTOP_APP_STATE_DEACTIVATED);
 }
 
 static const struct agl_shell_interface agl_shell_implementation = {
@@ -554,7 +596,7 @@ shell_desktop_set_app_property(struct wl_client *client,
 }
 
 static const struct agl_shell_desktop_interface agl_shell_desktop_implementation = {
-	.activate_app = shell_activate_app,
+	.activate_app = shell_desktop_activate_app,
 	.set_app_property = shell_desktop_set_app_property,
 	.deactivate_app = shell_deactivate_app,
 };