app: Add the app state events

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

5 files changed, 235 insertions, 2 deletions

diff --git a/app/app.pro b/app/app.pro
index de19410..6f39c05 100644
--- a/app/app.pro
+++ b/app/app.pro
@@ -15,9 +15,10 @@
 
 TEMPLATE = app
 TARGET = onscreenapp
-QT += quickcontrols2 quick qml
-CONFIG += c++11 link_pkgconfig
+QT += quickcontrols2 quick qml gui-private
+CONFIG += c++11 link_pkgconfig wayland-scanner pkgdatadir
 DESTDIR = $${OUT_PWD}/../package/root/bin
+PKGCONFIG += wayland-client
 #PKGCONFIG += qlibwindowmanager libhomescreen
 
 HEADERS += \
@@ -34,3 +35,6 @@ RESOURCES += \
     images/images.qrc
 
 LIBS += -ljson-c
+
+WAYLANDCLIENTSOURCES += \
+    protocol/agl-shell-desktop.xml
diff --git a/app/eventhandler.cpp b/app/eventhandler.cpp
index dfa0a12..e1ece21 100644
--- a/app/eventhandler.cpp
+++ b/app/eventhandler.cpp
@@ -17,12 +17,14 @@
 #include <functional>
 #include <QUrl>
 #include <QDebug>
+#include <QGuiApplication>
 #include <QJsonDocument>
 #include <QJsonObject>
 #include <QQmlContext>
 #include <QtQml/QQmlApplicationEngine>
 #include <cstring>
 #include <QFileInfo>
+#include <qpa/qplatformnativeinterface.h>
 
 #include "eventhandler.h"
 
@@ -37,6 +39,108 @@ const char _application_id[] = "application_id";
 
 void* EventHandler::myThis = 0;
 
+static struct wl_output *
+getWlOutput(QScreen *screen)
+{
+	QPlatformNativeInterface *native = qApp->platformNativeInterface();
+	void *output = native->nativeResourceForScreen("output", screen);
+	return static_cast<struct ::wl_output*>(output);
+}
+
+static void
+global_add(void *data, struct wl_registry *reg, uint32_t name,
+	   const char *interface, uint32_t version)
+{
+	struct agl_shell_desktop **shell =
+		static_cast<struct agl_shell_desktop **>(data);
+
+	if (strcmp(interface, agl_shell_desktop_interface.name) == 0) {
+		*shell = static_cast<struct agl_shell_desktop *>(
+			wl_registry_bind(reg, name, &agl_shell_desktop_interface, version)
+		);
+	}
+}
+
+static void global_remove(void *data, struct wl_registry *reg, uint32_t id)
+{
+	(void) data;
+	(void) reg;
+	(void) id;
+}
+
+static const struct wl_registry_listener registry_listener = {
+	global_add,
+	global_remove,
+};
+
+static void
+application_id_event(void *data, struct agl_shell_desktop *agl_shell_desktop,
+		const char *app_id)
+{
+	EventHandler *ev_handler = static_cast<EventHandler *>(data);
+	(void) agl_shell_desktop;
+
+	// should probably add here to a list the application or trigger emit
+	// for QML code, also note that we get here our own application
+	if (strcmp(app_id, APP_ID) == 0)
+		return;
+
+	qInfo() << "app_id: " << app_id;
+}
+
+static void
+application_state_event(void *data, struct agl_shell_desktop *agl_shell_desktop,
+			const char *app_id, const char *app_data,
+			uint32_t app_state, uint32_t app_role)
+{
+	EventHandler *ev_handler = static_cast<EventHandler *>(data);
+	(void) agl_shell_desktop;
+
+	qInfo() << "got application_state_event() for app_id=" <<
+		app_id << ", state=" << app_state << ", role=" << app_role;
+
+	if (strcmp(app_id, APP_ID))
+		return;
+
+	if (app_state != AGL_SHELL_DESKTOP_APP_STATE_ACTIVATED)
+		return;
+
+	if (app_role != AGL_SHELL_DESKTOP_APP_ROLE_POPUP)
+		return;
+
+	qInfo() << "Got message " << app_data;
+
+	// should signal that we got the message
+	emit ev_handler->updateModel(QVariant(app_data));
+	emit ev_handler->showOnScreen();
+}
+
+static const struct agl_shell_desktop_listener agl_shell_desk_listener = {
+	application_id_event,
+	application_state_event,
+};
+
+static struct agl_shell_desktop *
+register_agl_shell_desktop(void)
+{
+	struct wl_display *wl;
+	struct wl_registry *registry;
+	struct agl_shell_desktop *shell = nullptr;
+
+	QPlatformNativeInterface *native = qApp->platformNativeInterface();
+
+	wl = static_cast<struct wl_display *>(native->nativeResourceForIntegration("display"));
+	registry = wl_display_get_registry(wl);
+
+	wl_registry_add_listener(registry, &registry_listener, &shell);
+	// Roundtrip to get all globals advertised by the compositor
+	wl_display_roundtrip(wl);
+	wl_registry_destroy(registry);
+
+	return shell;
+}
+
+
 EventHandler::EventHandler(QObject *parent) :
     QObject(parent),
     m_dsp_sts(false)
@@ -45,12 +149,18 @@ EventHandler::EventHandler(QObject *parent) :
 
 EventHandler::~EventHandler()
 {
+    if (shell_desktop)
+	    agl_shell_desktop_destroy(shell_desktop);
 }
 
 void EventHandler::init(int port, const char *token)
 {
 	(void) port;
 	(void) token;
+
+	shell_desktop = register_agl_shell_desktop();
+	if (shell_desktop)
+		agl_shell_desktop_add_listener(shell_desktop, &agl_shell_desk_listener, this);
 #if 0
     myThis = this;
     mp_wm = new QLibWindowmanager();
diff --git a/app/eventhandler.h b/app/eventhandler.h
index 1fe910b..e4fbb6b 100644
--- a/app/eventhandler.h
+++ b/app/eventhandler.h
@@ -23,6 +23,9 @@
 #include <QPair>
 #include "hmi-debug.h"
 
+#include <wayland-client.h>
+#include "wayland-agl-shell-desktop-client-protocol.h"
+
 #define APP_ID "onscreenapp"
 
 class QQmlApplicationEngine;
@@ -61,6 +64,7 @@ private:
     void activateWindow(const char *role, const char *area = "normal.full");
 
     QPair<QString, QString> m_req, m_dsp;
+    struct agl_shell_desktop *shell_desktop = nullptr;
     int m_dsp_sts = HIDING;
 };
 #endif // HOMESCREENHANDLER_H
diff --git a/app/main.cpp b/app/main.cpp
index e6dd562..da8710a 100644
--- a/app/main.cpp
+++ b/app/main.cpp
@@ -128,6 +128,7 @@ int main(int argc, char *argv[])
     HMI_DEBUG(APP_ID, "onscreenapp started!");
 
     /* fake(s) an event */
+#if 0
     QTimer::singleShot(1000, [eventHandler](){
 		struct json_object *json = build_fake_json();
 		const char *json_str = json_object_to_json_string_ext(json,
@@ -135,6 +136,7 @@ int main(int argc, char *argv[])
 		emit eventHandler->updateModel(QVariant(json_str));
 		emit eventHandler->showOnScreen();
     });
+#endif
 
     return app.exec();
 }
diff --git a/app/protocol/agl-shell-desktop.xml b/app/protocol/agl-shell-desktop.xml
new file mode 100644
index 0000000..05a3725
--- /dev/null
+++ b/app/protocol/agl-shell-desktop.xml
@@ -0,0 +1,113 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="agl_shell_desktop">
+  <copyright>
+    Copyright © 2020 Collabora, 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="agl_shell_desktop" version="1">
+    <description summary="Private extension to allow applications activate other apps">
+      This extension can be used by regular application to instruct to compositor
+      to activate or switch to other running (regular) applications. The client
+      is responsbile for filtering their own app_id when receiving application id.
+
+      Note that other (regular) applications can bind to this interface and there is
+      no mechanism to place to restrict or limit that.
+    </description>
+
+    <enum name="app_role">
+      <entry name="popup" value="0"/>
+      <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
+        can be used to activate/switch to.
+
+        When this global is bound, the compositor will send all application ids
+        available for activation, but may send additional application id at any
+        time (when they've been mapped in the compositor).
+      </description>
+      <arg name="app_id" type="string"/>
+    </event>
+
+    <request name="activate_app">
+      <description summary="make client current window">
+        Ask the compositor to make a toplevel to become the current/focused
+        window for window management purposes.
+
+        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="app_data" type="string" allow-null="true"/>
+      <arg name="output" type="object" interface="wl_output"/>
+    </request>
+
+    <request name="set_app_property">
+      <description summary="set properties for a client identified by app_id">
+        Ask the compositor to make a toplevel obey the app_role and, depending
+        on the role, to use the the x and y values as initial positional values.
+        The x and y values would only make sense for certain roles.
+
+        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="role" type="uint" enum="app_role"/>
+      <arg name="x" type="int"/>
+      <arg name="y" type="int"/>
+      <arg name="output" type="object" interface="wl_output"/>
+    </request>
+
+    <request name="deactivate_app">
+      <description summary="de-activate/hide window identified by app_id">
+        Ask the compositor to hide the toplevel window for window
+        management purposes. Depending on the window role, this request
+        will either display the previously active window (or the background
+        in case there's no previously activate surface) or temporarly (or
+        until a 'activate_app' is called upon) hide the surface. All
+        the surfaces are identifiable by using the app_id, and no actions are
+        taken in case the app_id is not/was not present.
+
+        See xdg_toplevel.set_app_id from the xdg-shell protocol for a
+        description of app_id.
+      </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>