osx: make use of the 10.8+ user notification center to display growl like notifications

- if 10.8, use user notification center, if <10.8, use growl

Signed-off-by: Jonas Schnelli <jonas.schnelli@include7.ch>

bitcoin-qt.pro

@@ -393,8 +393,8 @@ win32:!contains(MINGW_THREAD_BUGFIX, 0) {
     DEFINES += _FILE_OFFSET_BITS=64
 }
 
-macx:HEADERS += src/qt/macdockiconhandler.h
-macx:OBJECTIVE_SOURCES += src/qt/macdockiconhandler.mm
+macx:HEADERS += src/qt/macdockiconhandler.h src/qt/macnotificationhandler.h
+macx:OBJECTIVE_SOURCES += src/qt/macdockiconhandler.mm src/qt/macnotificationhandler.mm
 macx:LIBS += -framework Foundation -framework ApplicationServices -framework AppKit
 macx:DEFINES += MAC_OSX MSG_NOSIGNAL=0
 macx:ICON = src/qt/res/icons/bitcoin.icns

src/qt/macnotificationhandler.h

@@ -0,0 +1,25 @@
+#ifndef MACNOTIFICATIONHANDLER_H
+#define MACNOTIFICATIONHANDLER_H
+#include <QObject>
+
+/** Macintosh-specific notification handler (supports UserNotificationCenter and Growl).
+ */
+class MacNotificationHandler : public QObject
+{
+    Q_OBJECT
+
+public:
+    /** shows a 10.8+ UserNotification in the UserNotificationCenter
+     */
+    void showNotification(const QString &title, const QString &text);
+
+    /** executes AppleScript */
+    void sendAppleScript(const QString &script);
+
+    /** check if OS can handle UserNotifications */
+    bool hasUserNotificationCenterSupport(void);
+    static MacNotificationHandler *instance();
+};
+
+
+#endif // MACNOTIFICATIONHANDLER_H

src/qt/macnotificationhandler.mm

@@ -0,0 +1,65 @@
+#include "macnotificationhandler.h"
+
+#undef slots
+#include <Cocoa/Cocoa.h>
+
+void MacNotificationHandler::showNotification(const QString &title, const QString &text)
+{
+    // check if users OS has support for NSUserNotification
+    if(this->hasUserNotificationCenterSupport()) {
+        // okay, seems like 10.8+
+        QByteArray utf8 = title.toUtf8();
+        char* cString = (char *)utf8.constData();
+        NSString *titleMac = [[NSString alloc] initWithUTF8String:cString];
+
+        utf8 = text.toUtf8();
+        cString = (char *)utf8.constData();
+        NSString *textMac = [[NSString alloc] initWithUTF8String:cString];
+
+        // do everything weak linked (because we will keep <10.8 compatibility)
+        id userNotification = [[NSClassFromString(@"NSUserNotification") alloc] init];
+        [userNotification performSelector:@selector(setTitle:) withObject:titleMac];
+        [userNotification performSelector:@selector(setInformativeText:) withObject:textMac];
+
+        id notificationCenterInstance = [NSClassFromString(@"NSUserNotificationCenter") performSelector:@selector(defaultUserNotificationCenter)];
+        [notificationCenterInstance performSelector:@selector(deliverNotification:) withObject:userNotification];
+
+        [titleMac release];
+        [textMac release];
+        [userNotification release];
+    }
+}
+
+// sendAppleScript just take a QString and executes it as apple script
+void MacNotificationHandler::sendAppleScript(const QString &script)
+{
+    QByteArray utf8 = script.toUtf8();
+    char* cString = (char *)utf8.constData();
+    NSString *scriptApple = [[NSString alloc] initWithUTF8String:cString];
+
+    NSAppleScript *as = [[NSAppleScript alloc] initWithSource:scriptApple];
+    NSDictionary *err = nil;
+    [as executeAndReturnError:&err];
+    [as release];
+    [scriptApple release];
+}
+
+bool MacNotificationHandler::hasUserNotificationCenterSupport(void)
+{
+    Class possibleClass = NSClassFromString(@"NSUserNotificationCenter");
+
+    // check if users OS has support for NSUserNotification
+    if(possibleClass!=nil) {
+        return true;
+    }
+    return false;
+}
+
+
+MacNotificationHandler *MacNotificationHandler::instance()
+{
+    static MacNotificationHandler *s_instance = NULL;
+    if (!s_instance)
+        s_instance = new MacNotificationHandler();
+    return s_instance;
+}

src/qt/notificator.cpp

@@ -18,7 +18,7 @@
 
 #ifdef Q_OS_MAC
 #include <ApplicationServices/ApplicationServices.h>
-extern bool qt_mac_execute_apple_script(const QString &script, AEDesc *ret);
+#include "macnotificationhandler.h"
 #endif
 
 // https://wiki.ubuntu.com/NotificationDevelopmentGuidelines recommends at least 128
@@ -47,6 +47,11 @@ Notificator::Notificator(const QString &programName, QSystemTrayIcon *trayicon,
     }
 #endif
 #ifdef Q_OS_MAC
+    // check if users OS has support for NSUserNotification
+    if( MacNotificationHandler::instance()->hasUserNotificationCenterSupport()) {
+        mode = UserNotificationCenter;
+    }
+    else {
         // Check if Growl is installed (based on Qt's tray icon implementation)
         CFURLRef cfurl;
         OSStatus status = LSGetApplicationForInfo(kLSUnknownType, kLSUnknownCreator, CFSTR("growlTicket"), kLSRolesAll, 0, &cfurl);
@@ -61,6 +66,7 @@ Notificator::Notificator(const QString &programName, QSystemTrayIcon *trayicon,
             CFRelease(cfurl);
             CFRelease(bundle);
         }
+    }
 #endif
 }
 
@@ -269,8 +275,14 @@ void Notificator::notifyGrowl(Class cls, const QString &title, const QString &te
     quotedTitle.replace("\\", "\\\\").replace("\"", "\\");
     quotedText.replace("\\", "\\\\").replace("\"", "\\");
     QString growlApp(this->mode == Notificator::Growl13 ? "Growl" : "GrowlHelperApp");
-    qt_mac_execute_apple_script(script.arg(notificationApp, quotedTitle, quotedText, notificationIcon, growlApp), 0);
+    MacNotificationHandler::instance()->sendAppleScript(script.arg(notificationApp, quotedTitle, quotedText, notificationIcon, growlApp));
 }
+
+void Notificator::notifyMacUserNotificationCenter(Class cls, const QString &title, const QString &text, const QIcon &icon) {
+    // icon is not supported by the user notification center yet. OSX will use the app icon.
+    MacNotificationHandler::instance()->showNotification(title, text);
+}
+
 #endif
 
 void Notificator::notify(Class cls, const QString &title, const QString &text, const QIcon &icon, int millisTimeout)
@@ -286,6 +298,9 @@ void Notificator::notify(Class cls, const QString &title, const QString &text, c
         notifySystray(cls, title, text, icon, millisTimeout);
         break;
 #ifdef Q_OS_MAC
+    case UserNotificationCenter:
+        notifyMacUserNotificationCenter(cls, title, text, icon);
+        break;
     case Growl12:
     case Growl13:
         notifyGrowl(cls, title, text, icon);

src/qt/notificator.h

@@ -50,7 +50,8 @@ private:
         Freedesktop,                /**< Use DBus org.freedesktop.Notifications */
         QSystemTray,                /**< Use QSystemTray::showMessage */
         Growl12,                    /**< Use the Growl 1.2 notification system (Mac only) */
-        Growl13         /**< Use the Growl 1.3 notification system (Mac only) */
+        Growl13,                    /**< Use the Growl 1.3 notification system (Mac only) */
+        UserNotificationCenter      /**< Use the 10.8+ User Notification Center (Mac only) */
     };
     QString programName;
     Mode mode;
@@ -63,6 +64,7 @@ private:
     void notifySystray(Class cls, const QString &title, const QString &text, const QIcon &icon, int millisTimeout);
 #ifdef Q_OS_MAC
     void notifyGrowl(Class cls, const QString &title, const QString &text, const QIcon &icon);
+    void notifyMacUserNotificationCenter(Class cls, const QString &title, const QString &text, const QIcon &icon);
 #endif
 };