Add scriptable functions onStart and onExit

Function onStart is called after server application starts, onExit
before it exits.

This is part of issue #59.

Signed-off-by: Lukas Holecek <hluk@email.cz>

src/app/clipboardserver.cpp

@@ -144,6 +144,8 @@ ClipboardServer::ClipboardServer(QApplication *app, const QString &sessionName)
     m_ignoreKeysTimer.setSingleShot(true);
 
     startMonitoring();
+
+    callback("onStart");
 }
 
 ClipboardServer::~ClipboardServer()
@@ -227,6 +229,9 @@ void ClipboardServer::onAboutToQuit()
 {
     COPYQ_LOG("Closing server.");
 
+    callback("onExit");
+    waitForCallbackToFinish();
+
     m_ignoreNewConnections = true;
 
     terminateClients(10000);
@@ -353,6 +358,20 @@ void ClipboardServer::waitForClientsToFinish(int waitMs)
     while ( !m_clients.isEmpty() && t.sleep() ) {}
 }
 
+void ClipboardServer::waitForCallbackToFinish()
+{
+    if (m_callback)
+        m_callback->waitForFinished();
+}
+
+void ClipboardServer::callback(const QString &scriptFunction)
+{
+    waitForCallbackToFinish();
+    m_callback = new Action();
+    m_callback->setCommand(QStringList() << "copyq" << scriptFunction);
+    m_wnd->runInternalAction(m_callback);
+}
+
 void ClipboardServer::onClientNewConnection(const ClientSocketPtr &client)
 {
     if (m_ignoreNewConnections) {

src/app/clipboardserver.h

@@ -120,10 +120,14 @@ class ClipboardServer : public QObject, public App
     void terminateClients(int waitMs);
 
     void waitForClientsToFinish(int waitMs);
+    void waitForCallbackToFinish();
+
+    void callback(const QString &scriptFunction);
 
     Server *m_server = nullptr;
     MainWindow* m_wnd = nullptr;
     QPointer<Action> m_monitor;
+    QPointer<Action> m_callback;
     bool m_ignoreNewConnections = false;
     QMap<QxtGlobalShortcut*, Command> m_shortcutActions;
     QTimer m_ignoreKeysTimer;

src/common/action.cpp

@@ -307,11 +307,20 @@ bool Action::waitForFinished(int msecs)
     QPointer<QObject> self(this);
     QEventLoop loop;
     QTimer t;
-    connectProcessFinished(m_processes.back(), &loop, &QEventLoop::quit);
-    connect(&t, &QTimer::timeout, &loop, &QEventLoop::quit);
-    t.start(msecs);
+    connect(this, &Action::actionFinished, &loop, &QEventLoop::quit);
+    if (msecs >= 0) {
+        connect(&t, &QTimer::timeout, &loop, &QEventLoop::quit);
+        t.setSingleShot(true);
+        t.start(msecs);
+    }
     loop.exec(QEventLoop::ExcludeUserInputEvents);
 
+    // Loop stopped because application is exiting?
+    while ( self && isRunning() && (msecs < 0 || t.isActive()) ) {
+        m_processes.back()->waitForFinished(50);
+        QCoreApplication::processEvents();
+    }
+
     return !self || !isRunning();
 }
 

src/common/action.h

@@ -78,7 +78,7 @@ class Action : public QObject
 
     bool waitForStarted(int msecs);
 
-    bool waitForFinished(int msecs);
+    bool waitForFinished(int msecs = -1);
 
     bool isRunning() const;
 

src/scriptable/scriptable.h

@@ -344,6 +344,9 @@ public slots:
     void onOwnClipboardChanged();
     void onHiddenClipboardChanged();
 
+    void onStart() {}
+    void onExit() {}
+
     void synchronizeToSelection();
     void synchronizeFromSelection();