OSX: add class to open files in desired application

Unfortunately it doesn't look like Qt provides a wrapper for this functionality.

src/imaginario.pro

@@ -183,6 +183,10 @@ macx {
     QMAKE_SUBSTITUTES += $${TOP_SRC_DIR}/data/desktop/ImaginarioInfo.plist.in
     QMAKE_INFO_PLIST = $${TOP_BUILD_DIR}/data/desktop/ImaginarioInfo.plist
     QT += svg # so that macdeployqt copies the svg plugin
+
+    SOURCES += macos.mm
+    HEADERS += macos.h
+    LIBS += -framework CoreServices
 }
 
 win32 {

src/macos.h

+/*
+ * Copyright (C) 2019 Alberto Mardegan <mardy@users.sourceforge.net>
+ *
+ * This file is part of Imaginario.
+ *
+ * Imaginario is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Imaginario is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Imaginario.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IMAGINARIO_MACOS_H
+#define IMAGINARIO_MACOS_H
+
+#include <QList>
+#include <QString>
+#include <QUrl>
+
+namespace Imaginario {
+
+class MacOS
+{
+public:
+    static void runApp(const QString &app, const QList<QUrl> &files);
+};
+
+} // namespace
+
+#endif // IMAGINARIO_MACOS_H

src/macos.mm

+/*
+ * Copyright (C) 2019 Alberto Mardegan <mardy@users.sourceforge.net>
+ *
+ * This file is part of Imaginario.
+ *
+ * Imaginario is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Imaginario is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Imaginario.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "macos.h"
+
+#include <QDebug>
+
+#import <CoreFoundation/CoreFoundation.h>
+#import <ApplicationServices/ApplicationServices.h>
+
+namespace Imaginario {
+
+void MacOS::runApp(const QString &app, const QList<QUrl> &files)
+{
+    CFURLRef appUrl = QUrl::fromLocalFile(app).toCFURL();
+
+    CFMutableArrayRef cfaFiles =
+        CFArrayCreateMutable(kCFAllocatorDefault,
+                             files.count(),
+                             &kCFTypeArrayCallBacks);
+    for (const QUrl &url: files) {
+        CFURLRef u = url.toCFURL();
+        CFArrayAppendValue(cfaFiles, u);
+        CFRelease(u);
+    }
+
+    LSLaunchURLSpec inspec;
+    inspec.appURL = appUrl;
+    inspec.itemURLs = cfaFiles;
+    inspec.asyncRefCon = NULL;
+    inspec.launchFlags = kLSLaunchDefaults + kLSLaunchAndDisplayErrors;
+    inspec.passThruParams = NULL;
+
+    OSStatus ret;
+    ret = LSOpenFromURLSpec(&inspec, NULL);
+    CFRelease(appUrl);
+}
+
+} // namespace