[mpriscontrol] add primitive windows support

Summary: Added primitive support for the mpriscontrol plugin on Windows by simulating VK_MEDIA key presses. I took a look into `ISystemMediaTransportControls`, but there doesn't seem to query it since it's per app. Leaving simulating key presses our only option for now. Completes T10000

Reviewers: kdeconnect, #kde_connect, albertvaka

Reviewed By: #kde_connect, albertvaka

Subscribers: albertvaka

Tags: #kde_connect, #windows

Maniphest Tasks: T10000

Differential Revision: https://phabricator.kde.org/D17702

plugins/CMakeLists.txt

@@ -5,10 +5,7 @@ install(FILES kdeconnect_plugin.desktop DESTINATION ${SERVICETYPES_INSTALL_DIR})
 add_subdirectory(ping)
 add_subdirectory(battery)
 add_subdirectory(sendnotifications)
-
-if (NOT WIN32)
-    add_subdirectory(mpriscontrol)
-endif()
+add_subdirectory(mpriscontrol)
 
 if(NOT SAILFISHOS)
     add_subdirectory(clipboard)

plugins/mpriscontrol/CMakeLists.txt

@@ -1,19 +1,29 @@
-set(kdeconnect_mpriscontrol_SRCS
-    mpriscontrolplugin.cpp
-)
+if(WIN32)
+    set(kdeconnect_mpriscontrol_SRCS
+        mpriscontrolplugin-win.cpp
+    )
+else()
+   set(kdeconnect_mpriscontrol_SRCS
+       mpriscontrolplugin.cpp
+   )
 
-qt5_add_dbus_interface(
-   kdeconnect_mpriscontrol_SRCS
-   mprisdbusinterface.xml
-   mprisdbusinterface
-)
+   qt5_add_dbus_interface(
+       kdeconnect_mpriscontrol_SRCS
+       mprisdbusinterface.xml
+       mprisdbusinterface
+   )
 
-qt5_add_dbus_interface(
-   kdeconnect_mpriscontrol_SRCS
-   propertiesInterface.xml
-   propertiesdbusinterface
-)
+   qt5_add_dbus_interface(
+       kdeconnect_mpriscontrol_SRCS
+       propertiesInterface.xml
+       propertiesdbusinterface
+   )
+endif()
 
 kdeconnect_add_plugin(kdeconnect_mpriscontrol JSON kdeconnect_mpriscontrol.json SOURCES  ${kdeconnect_mpriscontrol_SRCS})
 
-target_link_libraries(kdeconnect_mpriscontrol Qt5::DBus kdeconnectcore)
+if(WIN32)
+   target_link_libraries(kdeconnect_mpriscontrol kdeconnectcore)
+else()
+   target_link_libraries(kdeconnect_mpriscontrol Qt5::DBus kdeconnectcore)
+endif()

plugins/mpriscontrol/mpriscontrolplugin-win.cpp

@@ -0,0 +1,99 @@
+#include "mpriscontrolplugin-win.h"
+#include <core/device.h>
+
+#include <KPluginFactory>
+
+#include <Windows.h>
+
+K_PLUGIN_FACTORY_WITH_JSON( KdeConnectPluginFactory, "kdeconnect_mpriscontrol.json", registerPlugin< MprisControlPlugin >(); )
+
+Q_LOGGING_CATEGORY(KDECONNECT_PLUGIN_MPRIS, "kdeconnect.plugin.mpris")
+
+MprisControlPlugin::MprisControlPlugin(QObject *parent, const QVariantList &args) : KdeConnectPlugin(parent, args) {  }
+
+bool MprisControlPlugin::receivePacket(const NetworkPacket &np)
+{
+    if (np.has(QStringLiteral("playerList"))) {
+        return false; //Whoever sent this is an mpris client and not an mpris control!
+    }
+
+
+    //Send the player list
+    const QString player = np.get<QString>(QStringLiteral("player"));
+    bool valid_player = (player == playername);
+    if (!valid_player || np.get<bool>(QStringLiteral("requestPlayerList"))) {
+        const QList<QString> playerlist = {playername};
+
+        NetworkPacket np(PACKET_TYPE_MPRIS);
+        np.set(QStringLiteral("playerList"), playerlist);
+        np.set(QStringLiteral("supportAlbumArtPayload"), false);
+        sendPacket(np);
+        if (!valid_player) {
+            return true;
+        }
+    }
+
+    if (np.has(QStringLiteral("action"))) {
+        INPUT input={0};
+        input.type = INPUT_KEYBOARD;
+
+        input.ki.time = 0;
+        input.ki.dwExtraInfo = 0;
+        input.ki.wScan = 0;
+        input.ki.dwFlags = 0;
+
+        if (np.has(QStringLiteral("action"))) {
+            const QString& action = np.get<QString>(QStringLiteral("action"));
+            if (action == QStringLiteral("PlayPause") || (action == QStringLiteral("Play")) || (action == QStringLiteral("Pause")) ) {
+                input.ki.wVk = VK_MEDIA_PLAY_PAUSE;
+                ::SendInput(1,&input,sizeof(INPUT));
+            }
+            else if (action == QStringLiteral("Stop")) {
+                input.ki.wVk = VK_MEDIA_STOP;
+                ::SendInput(1,&input,sizeof(INPUT));
+            }
+            else if (action == QStringLiteral("Next")) {
+                    input.ki.wVk = VK_MEDIA_NEXT_TRACK;
+                ::SendInput(1,&input,sizeof(INPUT));
+            }
+            else if (action == QStringLiteral("Previous")) {
+                input.ki.wVk = VK_MEDIA_PREV_TRACK;
+                ::SendInput(1,&input,sizeof(INPUT));
+            }
+            else if (action == QStringLiteral("Stop")) {
+                input.ki.wVk = VK_MEDIA_STOP;
+                ::SendInput(1,&input,sizeof(INPUT));
+            }
+        }
+        
+    }
+
+    NetworkPacket answer(PACKET_TYPE_MPRIS);
+    bool somethingToSend = false;
+    if (np.get<bool>(QStringLiteral("requestNowPlaying"))) {
+        answer.set(QStringLiteral("pos"), 0);
+        
+        answer.set(QStringLiteral("isPlaying"), false);
+
+        answer.set(QStringLiteral("canPause"), false);
+        answer.set(QStringLiteral("canPlay"), true);
+        answer.set(QStringLiteral("canGoNext"), true);
+        answer.set(QStringLiteral("canGoPrevious"), true);
+        answer.set(QStringLiteral("canSeek"), false);
+
+        somethingToSend = true;
+    }
+    if (np.get<bool>(QStringLiteral("requestVolume"))) {
+        answer.set(QStringLiteral("volume"), 100);
+        somethingToSend = true;
+    }
+
+    if (somethingToSend) {
+        answer.set(QStringLiteral("player"), player);
+        sendPacket(answer);
+    }
+
+    return true;
+}
+
+#include "mpriscontrolplugin-win.moc"

plugins/mpriscontrol/mpriscontrolplugin-win.h

@@ -0,0 +1,29 @@
+#ifndef MPRISCONTROLPLUGINWIN_H
+#define MPRISCONTROLPLUGINWIN_H
+
+#include <core/kdeconnectplugin.h>
+
+#include <QString>
+#include <QLoggingCategory>
+
+#define PLAYERNAME QStringLiteral("Media Player")
+
+#define PACKET_TYPE_MPRIS QStringLiteral("kdeconnect.mpris")
+
+Q_DECLARE_LOGGING_CATEGORY(KDECONNECT_PLUGIN_MPRIS)
+
+class MprisControlPlugin
+    : public KdeConnectPlugin
+{
+    Q_OBJECT
+
+  public:
+    explicit MprisControlPlugin(QObject *parent, const QVariantList &args);
+
+    bool receivePacket(const NetworkPacket &np) override;
+    void connected() override {}
+
+  private:
+    const QString playername = "Media Player";
+};
+#endif //MPRISCONTROLPLUGINWIN_H