winmain for winrt

WinRT passes the executable and Appx server info to the CRT main, and
supports several additional activation arguments as well. This handles the
arguments passed to main as well as the case where a modern app is
launched from an external application (e.g. Qt Creator).


Task-number: QTBUG-30198
Change-Id: Ia843e98c7843d5705f5f6d1c809de0b6bcdb5d26
Done-with: Kamil Trzcinski
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>

2 files changed, 156 insertions, 1 deletions

diff --git a/src/winmain/qtmain_winrt.cpp b/src/winmain/qtmain_winrt.cpp
new file mode 100644
index 0000000000..d0f138269f
--- /dev/null
+++ b/src/winmain/qtmain_winrt.cpp
@@ -0,0 +1,150 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Windows main function of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*
+  This file contains the code in the qtmain library for WinRT.
+  qtmain contains the WinRT startup code and is required for
+  linking to the Qt DLL.
+
+  When a Windows application starts, the WinMain function is
+  invoked. WinMain creates the WinRT application which in turn
+  calls the main entry point.
+*/
+
+extern "C" int main(int, char **);
+
+#include <qbytearray.h>
+#include <qstring.h>
+#include <qlist.h>
+#include <qvector.h>
+
+#include <wrl.h>
+#include <Windows.ApplicationModel.core.h>
+
+using namespace ABI::Windows::ApplicationModel;
+using namespace ABI::Windows::Foundation;
+using namespace Microsoft::WRL;
+
+#define qHString(x) Wrappers::HString::MakeReference(x).Get()
+#define CoreApplicationClass RuntimeClass_Windows_ApplicationModel_Core_CoreApplication
+typedef ITypedEventHandler<Core::CoreApplicationView *, Activation::IActivatedEventArgs *> ActivatedHandler;
+
+class AppContainer : public Microsoft::WRL::RuntimeClass<Core::IFrameworkView>
+{
+public:
+    AppContainer(int argc, wchar_t **argv) : m_argc(argc)
+    {
+        m_argv.reserve(argc);
+        for (int i = 0; i < argc; ++i) {
+            QByteArray arg = QString::fromWCharArray(argv[i]).toLocal8Bit();
+            m_argv.append(qstrdup(arg.constData()));
+        }
+    }
+
+    ~AppContainer()
+    {
+        foreach (const char *arg, m_argv)
+            delete[] arg;
+    }
+
+    // IFrameworkView Methods
+    HRESULT __stdcall Initialize(Core::ICoreApplicationView *view)
+    {
+        view->add_Activated(Callback<ActivatedHandler>(this, &AppContainer::onActivated).Get(),
+                            &m_activationToken);
+        return S_OK;
+    }
+    HRESULT __stdcall SetWindow(ABI::Windows::UI::Core::ICoreWindow *) { return S_OK; }
+    HRESULT __stdcall Load(HSTRING) { return S_OK; }
+    HRESULT __stdcall Run()
+    {
+        return main(m_argv.count(), m_argv.data());
+    }
+    HRESULT __stdcall Uninitialize() { return S_OK; }
+
+private:
+    // Activation handler
+    HRESULT onActivated(Core::ICoreApplicationView *, Activation::IActivatedEventArgs *args)
+    {
+        Activation::ILaunchActivatedEventArgs *launchArgs;
+        if (SUCCEEDED(args->QueryInterface(&launchArgs))) {
+            for (int i = m_argc; i < m_argv.size(); ++i)
+                delete[] m_argv[i];
+            m_argv.resize(m_argc);
+            HSTRING arguments;
+            launchArgs->get_Arguments(&arguments);
+            foreach (const QByteArray &arg, QString::fromWCharArray(
+                         WindowsGetStringRawBuffer(arguments, nullptr)).toLocal8Bit().split(' ')) {
+                m_argv.append(qstrdup(arg.constData()));
+            }
+        }
+        return S_OK;
+    }
+
+    int m_argc;
+    QVector<char *> m_argv;
+    EventRegistrationToken m_activationToken;
+};
+
+class AppViewSource : public Microsoft::WRL::RuntimeClass<Core::IFrameworkViewSource>
+{
+public:
+    AppViewSource(int argc, wchar_t *argv[]) : argc(argc), argv(argv) { }
+    HRESULT __stdcall CreateView(Core::IFrameworkView **frameworkView)
+    {
+        return (*frameworkView = Make<AppContainer>(argc, argv).Detach()) ? S_OK : E_OUTOFMEMORY;
+    }
+private:
+    int argc;
+    wchar_t **argv;
+};
+
+// Main entry point for Appx containers
+int wmain(int argc, wchar_t *argv[])
+{
+    if (FAILED(RoInitialize(RO_INIT_MULTITHREADED)))
+        return 1;
+
+    Core::ICoreApplication *appFactory;
+    if (FAILED(RoGetActivationFactory(qHString(CoreApplicationClass), IID_PPV_ARGS(&appFactory))))
+        return 2;
+
+    return appFactory->Run(Make<AppViewSource>(argc, argv).Get());
+}
diff --git a/src/winmain/winmain.pro b/src/winmain/winmain.pro
index b8c920b8e6..4303c3bc12 100644
--- a/src/winmain/winmain.pro
+++ b/src/winmain/winmain.pro
@@ -16,7 +16,12 @@ win32-msvc*:QMAKE_CFLAGS_DEBUG *= -Z7
 win32-msvc*:QMAKE_CXXFLAGS_DEBUG *= -Z7
 win32-g++*: DEFINES += QT_NEEDS_QMAIN
 
-SOURCES = qtmain_win.cpp
+winrt {
+    QMAKE_LFLAGS += /ENTRY:wmainCRTStartup
+    SOURCES = qtmain_winrt.cpp
+} else {
+    SOURCES = qtmain_win.cpp
+}
 
 load(qt_installs)