use shared mem to prevent two apps from hiding their notifications

src/core/notification/notification.h

@@ -299,11 +299,16 @@ inline QDebug operator<< ( QDebug debug, const Snore::Notification &noti )
 {
     if(noti.isValid())
     {
-        debug << "Snore::Notification(" << noti.title() << ", " << noti.text() << "," << noti.id() << ")" ;
+        debug.nospace() << "Snore::Notification(" << noti.title() << ", " << noti.text() << ", id = " << noti.id();
+        if(noti.isUpdate())
+        {
+            debug << ", oldID = " << noti.old().id();
+        }
+        debug << ")" ;
     }
     else
     {
-        debug << "Snore::Notification(0x00)" ;
+        debug.nospace() << "Snore::Notification(0x00)" ;
     }
     return debug.maybeSpace();
 }

src/plugins/backends/snore/notifywidget.cpp

@@ -30,9 +30,21 @@ NotifyWidget::NotifyWidget(int pos,QWidget *parent) :
     QWidget(parent, Qt::SplashScreen | Qt::WindowStaysOnTopHint),
     ui(new Ui::NotifyWidget),
     m_desktop(QDesktopWidget().availableGeometry()),
-    m_id(pos)
+    m_id(pos),
+    m_mem(QString("SnoreNotifyWidget%1").arg(QString::number(m_id)))
 {
     ui->setupUi(this);
+    if(m_mem.create(sizeof(SHARED_MEM_TYPE)))
+    {
+        m_mem.lock();
+        bool *data = (bool*)m_mem.data();
+        *data = true;
+        m_mem.unlock();
+    }
+    else
+    {
+        m_mem.attach();
+    }
 
     TomahawkUtils::DpiScaler::setFontSize(10);
     m_scaler = new TomahawkUtils::DpiScaler(this);
@@ -40,11 +52,13 @@ NotifyWidget::NotifyWidget(int pos,QWidget *parent) :
 
     setFixedSize( m_scaler->scaled(300, 80));
 
-    m_dest = QPoint(m_desktop.topRight().x() - width(), m_desktop.topRight().y() + (m_scaler->scaledY(10) + height()) * pos);
+    m_dest = QPoint(m_desktop.topRight().x() - width(), m_desktop.topRight().y() + m_scaler->scaledY(10) + (m_scaler->scaledY(10) + height()) * pos);
+    m_start = QPoint(m_desktop.topRight().x(), m_dest.y());
 }
 
 NotifyWidget::~NotifyWidget()
 {
+    release();
     delete m_scaler;
     delete ui;
 }
@@ -52,13 +66,13 @@ NotifyWidget::~NotifyWidget()
 void NotifyWidget::display(const Notification &notification)
 {
     update(notification);
-    move(m_desktop.topRight().x(), m_desktop.topRight().y() + (m_scaler->scaledY(10) + height()) * m_id);
+    move(m_start);
     show();
     m_moveTimer = new QTimer(this);
     m_moveTimer->setInterval(2);
     connect( m_moveTimer, SIGNAL(timeout()), this, SLOT(slotMove()));
     m_moveTimer->start();
-    snoreDebug( SNORE_DEBUG ) << size();
+    snoreDebug( SNORE_DEBUG ) << notification;
 
 }
 
@@ -77,6 +91,35 @@ void NotifyWidget::update(const Notification &notification)
     setPalette(img);
 }
 
+bool NotifyWidget::acquire()
+{
+    bool out = false;
+    m_mem.lock();
+    bool *data = (bool*)m_mem.data();
+    if(*data)
+    {
+        *data = false;
+        out = true;
+    }
+    m_mem.unlock();
+    return out;
+}
+
+bool NotifyWidget::release()
+{
+    snoreDebug( SNORE_DEBUG ) << notification();
+    bool out = false;
+    m_mem.lock();
+    bool *data = (bool*)m_mem.data();
+    if(!*data)
+    {
+        *data = true;
+        out = true;
+    }
+    m_mem.unlock();
+    return out;
+}
+
 Notification &NotifyWidget::notification()
 {
     return m_notification;

src/plugins/backends/snore/notifywidget.h

@@ -22,6 +22,7 @@
 
 #include <QWidget>
 #include <QTimer>
+#include <QSharedMemory>
 #include "core/notification/notification.h"
 #include "DpiScaler.h"
 
@@ -29,6 +30,7 @@ namespace Ui {
 class NotifyWidget;
 }
 
+typedef bool SHARED_MEM_TYPE;
 class NotifyWidget : public QWidget
 {
     Q_OBJECT
@@ -40,11 +42,15 @@ public:
     void display(const Snore::Notification &notification);
     void update(const Snore::Notification &notification);
 
+    bool acquire();
+    bool release();
+
     Snore::Notification &notification();
 
     int id();
 
 
+
 signals:
     void invoked();
     void dismissed();
@@ -65,11 +71,13 @@ private:
     Ui::NotifyWidget *ui;
     QTimer *m_moveTimer;
     QPoint m_dest;
+    QPoint m_start;
     QRect m_desktop;
     TomahawkUtils::DpiScaler *m_scaler;
     Snore::Notification m_notification;
 
     int m_id;
+    QSharedMemory m_mem;
 };
 
 #endif // NOTIFYWIDGET_H

src/plugins/backends/snore/snorenotifier.cpp

@@ -23,6 +23,7 @@
 #include "core/notification/notification_p.h"
 #include "core/snore_p.h"
 #include <QApplication>
+#include <QThread>
 
 Q_EXPORT_PLUGIN2(libsnore_backend_snore,SnoreNotifier)
 
@@ -48,16 +49,19 @@ void SnoreNotifier::slotNotify(Snore::Notification notification)
     if(notification.isUpdate())
     {
         NotifyWidget *w = m_widgets[notification.old().hints().privateValue(this, "id").toInt()];
+        if(w->isVisible() && w->notification().id() == notification.old().id())
+        {
             w->update(notification);
             notification.hints().setPrivateValue(this, "id", w->id());
             startTimeout(notification);
             return;
         }
-    else if(m_queue.isEmpty())
+    }
+    if(m_queue.isEmpty())
     {
         foreach (NotifyWidget *w, m_widgets)
         {
-            if(w->isHidden())
+            if(w->acquire())
             {
                 w->display(notification);
                 notification.hints().setPrivateValue(this, "id", w->id());
@@ -67,22 +71,15 @@ void SnoreNotifier::slotNotify(Snore::Notification notification)
         }
     }
     m_queue.append(notification);
+    m_timer->start();
 }
 
 void SnoreNotifier::slotCloseNotification(Snore::Notification notification)
 {
     NotifyWidget *w = m_widgets[notification.hints().privateValue(this, "id").toInt()];
-    if(!m_queue.isEmpty())
-    {
-        Notification nextNoti = m_queue.takeLast();
-        w->display(nextNoti);
-        nextNoti.hints().setPrivateValue(this, "id", w->id());
-        startTimeout(nextNoti);
-    }
-    else
-    {
     w->hide();
-    }
+    w->release();
+    //the timer will show the next
 }
 
 
@@ -103,6 +100,33 @@ void SnoreNotifier::slotInvoked()
     slotCloseNotification(notification);
 }
 
+void SnoreNotifier::slotProcessQueue()
+{
+    if(m_queue.isEmpty())
+    {
+
+        snoreDebug( SNORE_DEBUG ) << "queue is empty";
+        m_timer->stop();
+    }
+    else
+    {
+        foreach (NotifyWidget *w, m_widgets)
+        {
+            bool free = false;
+            if(w->acquire())
+            {
+                Notification notification = m_queue.takeFirst();
+                w->display(notification);
+                notification.hints().setPrivateValue(this, "id", w->id());
+                startTimeout(notification);
+                free = true;
+            }
+            snoreDebug( SNORE_DEBUG ) << w << free;
+        }
+    }
+
+}
+
 void SnoreNotifier::setup()
 {
     for(int i=0;i<m_widgets.size();++i)
@@ -112,6 +136,11 @@ void SnoreNotifier::setup()
         connect(w, SIGNAL(dismissed()), this, SLOT(slotDismissed()));
         connect(w, SIGNAL(invoked()), this, SLOT(slotInvoked()));
     }
+
+
+    m_timer = new QTimer(this);
+    m_timer->setInterval(500);
+    connect(m_timer, SIGNAL(timeout()), this, SLOT(slotProcessQueue()));
 }
 
 
@@ -132,6 +161,7 @@ bool SnoreNotifier::deinitialize()
         {
             m_widgets[i]->deleteLater();
         }
+        m_timer->deleteLater();
         return true;
     }
     return false;

src/plugins/backends/snore/snorenotifier.h

@@ -43,6 +43,7 @@ public slots:
 private slots:
     void slotDismissed();
     void slotInvoked();
+    void slotProcessQueue();
 
     void setup();
 
@@ -50,6 +51,7 @@ private:
 
     QList<Snore::Notification> m_queue;
     QVector<NotifyWidget*> m_widgets;
+    QTimer *m_timer;
 
 
 };