use qtwebchannel to communicate with userscript

CMakeLists.txt

@@ -43,6 +43,7 @@ set(discord-screenaudio_SRC
   src/discordpage.cpp
   src/streamdialog.cpp
   src/log.cpp
+  src/userscript.cpp
   resources.qrc
 )
 

assets/userscript.js

@@ -1,5 +1,3 @@
-// From v0.4
-
 navigator.mediaDevices.chromiumGetDisplayMedia =
   navigator.mediaDevices.getDisplayMedia;
 
@@ -16,12 +14,12 @@ const getAudioDevice = async (nameOfAudioDevice) => {
     let devices = await navigator.mediaDevices.enumerateDevices();
     audioDevice = devices.find(({ label }) => label === nameOfAudioDevice);
     if (!audioDevice)
-      console.log(
+      userscript.log(
-        `dsa: Did not find '${nameOfAudioDevice}', trying again in 100ms`
+        `Did not find '${nameOfAudioDevice}', trying again in 100ms`
       );
     await sleep(100);
   }
-  console.log(`dsa: Found '${nameOfAudioDevice}'`);
+  userscript.log(`Found '${nameOfAudioDevice}'`);
   return audioDevice;
 };
 
@@ -71,6 +69,13 @@ function setGetDisplayMedia(video = true, overrideArgs = undefined) {
 
 setGetDisplayMedia();
 
+let userscript;
+let muteBtn;
+let deafenBtn;
+let streamStartBtn;
+let streamStartBtnInitialDisplay;
+let streamStartBtnClone;
+let resolutionString;
 const clonedElements = [];
 const hiddenElements = [];
 let wasStreamActive = false;
@@ -121,13 +126,43 @@ function createSwitch(text, enabled, onClick) {
   return container;
 }
 
-setInterval(() => {
+// Fix for broken discord notifications after restart
+// (https://github.com/maltejur/discord-screenaudio/issues/17)
+Notification.requestPermission();
+
+setTimeout(() => {
+  new QWebChannel(qt.webChannelTransport, (channel) => {
+    userscript = channel.objects.userscript;
+    main();
+  });
+});
+
+function main() {
+  userscript.muteToggled.connect(() => {
+    muteBtn && muteBtn.click();
+  });
+
+  userscript.deafenToggled.connect(() => {
+    deafenBtn && deafenBtn.click();
+  });
+
+  userscript.streamStarted.connect((video, width, height, frameRate) => {
+    resolutionString = video ? `${height}p ${frameRate}FPS` : "Audio Only";
+    setGetDisplayMedia(video, {
+      audio: true,
+      video: { width, height, frameRate },
+    });
+    streamStartBtn.click();
+    streamStartBtn.style.display = streamStartBtnInitialDisplay;
+    streamStartBtnClone.remove();
+  });
+
+  setInterval(async () => {
     const streamActive =
       document.getElementsByClassName("panel-2ZFCRb activityPanel-9icbyU")
         .length > 0;
 
-  if (!streamActive && wasStreamActive)
+    if (!streamActive && wasStreamActive) userscript.stopVirtmic();
-    console.log("!discord-screenaudio-stream-stopped");
     wasStreamActive = streamActive;
 
     if (streamActive) {
@@ -142,63 +177,49 @@ setInterval(() => {
       hiddenElements.length = 0;
     } else {
       for (const el of [
-      document.getElementsByClassName("actionButtons-2vEOUh")?.[0]?.children[1],
+        document.getElementsByClassName("actionButtons-2vEOUh")?.[0]
+          ?.children[1],
         document.querySelector(
           ".wrapper-3t3Yqv > div > div > div > div > .controlButton-2PMNom"
         ),
       ]) {
         if (!el) continue;
         if (el.classList.contains("discord-screenaudio-cloned")) continue;
-      el.classList.add("discord-screenaudio-cloned");
+        streamStartBtn = el;
-      elClone = el.cloneNode(true);
+        streamStartBtn.classList.add("discord-screenaudio-cloned");
-      elClone.title = "Share Your Screen with Audio";
+
-      elClone.addEventListener("click", () => {
+        streamStartBtnClone = streamStartBtn.cloneNode(true);
-        console.log("!discord-screenaudio-start-stream");
+        streamStartBtnClone.title = "Share Your Screen with Audio";
+        streamStartBtnClone.addEventListener("click", () => {
+          userscript.showStreamDialog();
         });
 
-      const initialDisplay = el.style.display;
+        streamStartBtnInitialDisplay = streamStartBtn.style.display;
 
-      window.discordScreenaudioStartStream = (
+        streamStartBtn.style.display = "none";
-        video,
+        streamStartBtn.parentNode.insertBefore(streamStartBtnClone, el);
-        width,
-        height,
-        frameRate
-      ) => {
-        window.discordScreenaudioResolutionString = video
-          ? `${height}p ${frameRate}FPS`
-          : "Audio Only";
-        setGetDisplayMedia(video, {
-          audio: true,
-          video: { width, height, frameRate },
-        });
-        el.click();
-        el.style.display = initialDisplay;
-        elClone.remove();
-      };
 
-      el.style.display = "none";
+        clonedElements.push(streamStartBtnClone);
-      el.parentNode.insertBefore(elClone, el);
+        hiddenElements.push(streamStartBtn);
-
-      clonedElements.push(elClone);
-      hiddenElements.push(el);
       }
     }
 
     // Add about text in settings
     if (
-    document.getElementsByClassName("dirscordScreenaudioAboutText").length == 0
+      document.getElementsByClassName("dirscordScreenaudioAboutText").length ==
+      0
     ) {
       for (const el of document.getElementsByClassName("info-3pQQBb")) {
         let aboutEl;
-      if (window.discordScreenaudioKXMLGUI) {
+        if (userscript.kxmlgui) {
           aboutEl = document.createElement("a");
           aboutEl.addEventListener("click", () => {
-          console.log("!discord-screenaudio-about");
+            userscript.showHelpMenu();
           });
         } else {
           aboutEl = document.createElement("div");
         }
-      aboutEl.innerText = `discord-screenaudio ${window.discordScreenaudioVersion}`;
+        aboutEl.innerText = `discord-screenaudio ${userscript.version}`;
         aboutEl.style.fontSize = "12px";
         aboutEl.style.color = "var(--text-muted)";
         aboutEl.style.textTransform = "none";
@@ -227,7 +248,7 @@ setInterval(() => {
       div.style.marginBottom = "50px";
       div.appendChild(
         createButton("Edit Global Keybinds", () => {
-        console.log("!discord-screenaudio-keybinds");
+          userscript.log("!discord-screenaudio-keybinds");
         })
       );
       el.innerHTML = "";
@@ -237,31 +258,28 @@ setInterval(() => {
     const buttonContainer =
       document.getElementsByClassName("container-YkUktl")[0];
     if (!buttonContainer) {
-    console.log(
+      userscript.log(
-      "dsa: Cannot locate Mute/Deafen/Settings button container, please report this on GitHub"
+        "Cannot locate Mute/Deafen/Settings button container, please report this on GitHub"
       );
     }
 
-  const muteBtn = buttonContainer
+    muteBtn = buttonContainer
       ? buttonContainer.getElementsByClassName(
           "button-12Fmur enabled-9OeuTA button-f2h6uQ lookBlank-21BCro colorBrand-I6CyqQ grow-2sR_-F"
         )[0]
       : null;
-  window.discordScreenaudioToggleMute = () => muteBtn && muteBtn.click();
 
-  const deafenBtn = buttonContainer
+    deafenBtn = buttonContainer
       ? buttonContainer.getElementsByClassName(
           "button-12Fmur enabled-9OeuTA button-f2h6uQ lookBlank-21BCro colorBrand-I6CyqQ grow-2sR_-F"
         )[1]
       : null;
 
-  window.discordScreenaudioToggleDeafen = () => deafenBtn && deafenBtn.click();
+    if (resolutionString) {
-
-  if (window.discordScreenaudioResolutionString) {
       for (const el of document.getElementsByClassName(
         "qualityIndicator-39wQDy"
       )) {
-      el.innerHTML = window.discordScreenaudioResolutionString;
+        el.innerHTML = resolutionString;
       }
     }
 
@@ -287,17 +305,16 @@ setInterval(() => {
 
           section.appendChild(
             createButton("Edit Global Keybinds", () => {
-            console.log("!discord-screenaudio-keybinds");
+              userscript.log("!discord-screenaudio-keybinds");
             })
           );
 
           section.appendChild(
             createSwitch(
               "Move discord-screenaudio to the system tray instead of closing",
-            window.discordScreenaudioTrayEnabled,
+              await userscript.getBoolPref("trayIcon", false),
               (enabled) => {
-              window.discordScreenaudioTrayEnabled = enabled;
+                userscript.setTrayIcon(enabled);
-              console.log(`!discord-screenaudio-tray-${enabled}`);
               }
             )
           );
@@ -305,10 +322,9 @@ setInterval(() => {
           section.appendChild(
             createSwitch(
               "Start discord-screenaudio hidden to tray",
-            window.discordScreenaudioStartHidden,
+              await userscript.getPref("startHidden", false),
               (hidden) => {
-              window.discordScreenaudioStartHidden = hidden;
+                userscript.setPref("startHidden", hidden);
-              console.log(`!discord-screenaudio-starthidden-${hidden}`);
               }
             )
           );
@@ -321,8 +337,5 @@ setInterval(() => {
         }
       }
     }
-}, 500);
+  }, 500);
-
+}
-// Fix for broken discord notifications after restart
-// (https://github.com/maltejur/discord-screenaudio/issues/17)
-Notification.requestPermission();

src/discordpage.cpp

@@ -3,19 +3,6 @@
 #include "mainwindow.h"
 #include "virtmic.h"
 
-#ifdef KXMLGUI
-#include <KAboutData>
-#include <KHelpMenu>
-#include <KShortcutsDialog>
-#include <KXmlGuiWindow>
-#include <QAction>
-
-#ifdef KGLOBALACCEL
-#include <KGlobalAccel>
-#endif
-
-#endif
-
 #include <QApplication>
 #include <QDesktopServices>
 #include <QFile>
@@ -29,7 +16,6 @@
 
 DiscordPage::DiscordPage(QWidget *parent) : QWebEnginePage(parent) {
   setBackgroundColor(QColor("#202225"));
-  m_virtmicProcess.setProcessChannelMode(QProcess::ForwardedChannels);
 
   connect(this, &QWebEnginePage::featurePermissionRequested, this,
           &DiscordPage::featurePermissionRequested);
@@ -51,77 +37,14 @@ DiscordPage::DiscordPage(QWidget *parent) : QWebEnginePage(parent) {
   settings()->setAttribute(QWebEngineSettings::JavascriptCanOpenWindows, false);
   settings()->setAttribute(QWebEngineSettings::ScrollAnimatorEnabled, true);
 
+  injectScriptFile("qwebchannel.js", ":/qtwebchannel/qwebchannel.js");
+
   setUrl(QUrl("https://discord.com/app"));
 
+  setWebChannel(new QWebChannel(this));
+  webChannel()->registerObject("userscript", &m_userScript);
+
   injectScriptFile("userscript.js", ":/assets/userscript.js");
-
-  injectScriptText("vars.js",
-                   QString("window.discordScreenaudioVersion = '%1'; "
-                           "window.discordScreenaudioTrayEnabled = %2; "
-                           "window.discordScreenaudioStartHidden = %3;")
-                       .arg(QApplication::applicationVersion())
-                       .arg(MainWindow::instance()
-                                ->settings()
-                                ->value("trayIcon", false)
-                                .toBool())
-                       .arg(MainWindow::instance()
-                                ->settings()
-                                ->value("startHidden", false)
-                                .toBool()));
-
-#ifdef KXMLGUI
-  injectScriptText("xmlgui.js", "window.discordScreenaudioKXMLGUI = true;");
-
-  KAboutData aboutData(
-      "discord-screenaudio", "discord-screenaudio",
-      QApplication::applicationVersion(),
-      "Custom Discord client with the ability to stream audio on Linux",
-      KAboutLicense::GPL_V3, "Copyright 2022 (C) Malte Jürgens");
-  aboutData.setBugAddress("https://github.com/maltejur/discord-screenaudio");
-  aboutData.addAuthor("Malte Jürgens", "Author", "maltejur@dismail.de",
-                      "https://github.com/maltejur");
-  aboutData.addCredit("edisionnano",
-                      "For creating and documenting the approach for streaming "
-                      "audio in Discord used in this project.",
-                      QString(),
-                      "https://github.com/edisionnano/"
-                      "Screenshare-with-audio-on-Discord-with-Linux");
-  aboutData.addCredit(
-      "Curve", "For creating the Rohrkabel library used in this project.",
-      QString(), "https://github.com/Curve");
-  aboutData.addComponent("Rohrkabel", "A C++ RAII Pipewire-API Wrapper", "1.3",
-                         "https://github.com/Soundux/rohrkabel");
-  m_helpMenu = new KHelpMenu(parent, aboutData);
-
-#ifdef KGLOBALACCEL
-  injectScriptText("kglobalaccel.js",
-                   "window.discordScreenaudioKGLOBALACCEL = true;");
-
-  auto toggleMuteAction = new QAction(this);
-  toggleMuteAction->setText("Toggle Mute");
-  toggleMuteAction->setIcon(QIcon::fromTheme("microphone-sensitivity-muted"));
-  connect(toggleMuteAction, &QAction::triggered, this,
-          &DiscordPage::toggleMute);
-
-  auto toggleDeafenAction = new QAction(this);
-  toggleDeafenAction->setText("Toggle Deafen");
-  toggleDeafenAction->setIcon(QIcon::fromTheme("audio-volume-muted"));
-  connect(toggleDeafenAction, &QAction::triggered, this,
-          &DiscordPage::toggleDeafen);
-
-  m_actionCollection = new KActionCollection(this);
-  m_actionCollection->addAction("toggleMute", toggleMuteAction);
-  KGlobalAccel::setGlobalShortcut(toggleMuteAction, QList<QKeySequence>{});
-  m_actionCollection->addAction("toggleDeafen", toggleDeafenAction);
-  KGlobalAccel::setGlobalShortcut(toggleDeafenAction, QList<QKeySequence>{});
-
-  m_shortcutsDialog = new KShortcutsDialog(KShortcutsEditor::GlobalAction);
-  m_shortcutsDialog->addCollection(m_actionCollection);
-#endif
-#endif
-
-  connect(&m_streamDialog, &StreamDialog::requestedStreamStart, this,
-          &DiscordPage::startStream);
 }
 
 void DiscordPage::injectScriptText(QString name, QString content) {
@@ -156,11 +79,10 @@ void DiscordPage::featurePermissionRequested(const QUrl &securityOrigin,
                        QWebEnginePage::PermissionGrantedByUser);
 
   if (feature == QWebEnginePage::Feature::MediaAudioCapture) {
-    if (m_virtmicProcess.state() == QProcess::NotRunning) {
+    if (!m_userScript.isVirtmicRunning()) {
       qDebug(virtmicLog) << "Starting Virtmic with no target to make sure "
                             "Discord can find all the audio devices";
-      m_virtmicProcess.start(QApplication::arguments()[0],
+      m_userScript.startVirtmic("None");
-                             {"--virtmic", "None"});
     }
   }
 }
@@ -187,86 +109,8 @@ QWebEnginePage *DiscordPage::createWindow(QWebEnginePage::WebWindowType type) {
   return new ExternalPage;
 }
 
-void DiscordPage::stopVirtmic() {
-  if (m_virtmicProcess.state() == QProcess::Running) {
-    qDebug(virtmicLog) << "Stopping Virtmic";
-    m_virtmicProcess.kill();
-    m_virtmicProcess.waitForFinished();
-  }
-}
-
-void DiscordPage::startVirtmic(QString target) {
-  qDebug(virtmicLog) << "Starting Virtmic with target" << target;
-  m_virtmicProcess.start(QApplication::arguments()[0], {"--virtmic", target});
-}
-
 void DiscordPage::javaScriptConsoleMessage(
     QWebEnginePage::JavaScriptConsoleMessageLevel level, const QString &message,
     int lineNumber, const QString &sourceID) {
-  if (message == "!discord-screenaudio-start-stream") {
-    if (m_streamDialog.isHidden())
-      m_streamDialog.setHidden(false);
-    else
-      m_streamDialog.activateWindow();
-    m_streamDialog.updateTargets();
-  } else if (message == "!discord-screenaudio-stream-stopped") {
-    stopVirtmic();
-  } else if (message == "!discord-screenaudio-about") {
-#ifdef KXMLGUI
-    m_helpMenu->aboutApplication();
-#endif
-  } else if (message == "!discord-screenaudio-keybinds") {
-#ifdef KXMLGUI
-#ifdef KGLOBALACCEL
-    m_shortcutsDialog->show();
-#else
-    QMessageBox::information(MainWindow::instance(), "discord-screenaudio",
-                             "Keybinds are not supported on this platform "
-                             "(KGlobalAccel is not available).",
-                             QMessageBox::Ok);
-#endif
-#else
-    QMessageBox::information(MainWindow::instance(), "discord-screenaudio",
-                             "Keybinds are not supported on this platform "
-                             "(KXmlGui and KGlobalAccel are not available).",
-                             QMessageBox::Ok);
-#endif
-  } else if (message == "!discord-screenaudio-tray-true") {
-    MainWindow::instance()->setTrayIcon(true);
-  } else if (message == "!discord-screenaudio-tray-false") {
-    MainWindow::instance()->setTrayIcon(false);
-  } else if (message == "!discord-screenaudio-starthidden-true") {
-    MainWindow::instance()->settings()->setValue("startHidden", true);
-  } else if (message == "!discord-screenaudio-starthidden-false") {
-    MainWindow::instance()->settings()->setValue("startHidden", false);
-  } else if (message.startsWith("dsa: ")) {
-    qDebug(userscriptLog) << message.mid(5).toUtf8().constData();
-  } else {
   qDebug(discordLog) << message;
-  }
-}
-
-void DiscordPage::startStream(bool video, bool audio, uint width, uint height,
-                              uint frameRate, QString target) {
-  stopVirtmic();
-  startVirtmic(audio ? target : "[None]");
-  // Wait a bit for the virtmic to start
-  QTimer::singleShot(200, [=]() {
-    runJavaScript(
-        QString("window.discordScreenaudioStartStream(%1, %2, %3, %4);")
-            .arg(video)
-            .arg(video ? width : 32)
-            .arg(video ? height : 16)
-            .arg(video ? frameRate : 1));
-  });
-}
-
-void DiscordPage::toggleMute() {
-  qDebug(shortcutLog) << "Toggling mute";
-  runJavaScript("window.discordScreenaudioToggleMute();");
-}
-
-void DiscordPage::toggleDeafen() {
-  qDebug(shortcutLog) << "Toggling deafen";
-  runJavaScript("window.discordScreenaudioToggleDeafen();");
 }

src/discordpage.h

@@ -1,15 +1,7 @@
 #pragma once
 
-#include "streamdialog.h"
+#include "userscript.h"
-#include "virtmic.h"
 
-#ifdef KXMLGUI
-#include <KActionCollection>
-#include <KHelpMenu>
-#include <KShortcutsDialog>
-#endif
-
-#include <QProcess>
 #include <QWebEngineFullScreenRequest>
 #include <QWebEnginePage>
 
@@ -20,15 +12,7 @@ public:
   explicit DiscordPage(QWidget *parent = nullptr);
 
 private:
-  StreamDialog m_streamDialog;
+  UserScript m_userScript;
-  QProcess m_virtmicProcess;
-#ifdef KXMLGUI
-  KHelpMenu *m_helpMenu;
-#ifdef KGLOBALACCEL
-  KActionCollection *m_actionCollection;
-  KShortcutsDialog *m_shortcutsDialog;
-#endif
-#endif
   bool acceptNavigationRequest(const QUrl &url,
                                QWebEnginePage::NavigationType type,
                                bool isMainFrame) override;
@@ -39,16 +23,10 @@ private:
                            const QString &sourceID) override;
   void injectScriptText(QString name, QString content);
   void injectScriptFile(QString name, QString source);
-  void stopVirtmic();
-  void startVirtmic(QString target);
-  void toggleMute();
-  void toggleDeafen();
 
 private Q_SLOTS:
   void featurePermissionRequested(const QUrl &securityOrigin,
                                   QWebEnginePage::Feature feature);
-  void startStream(bool video, bool audio, uint width, uint height,
-                   uint frameRate, QString target);
 };
 
 // Will immediately get destroyed again but is needed for navigation to

src/streamdialog.cpp

@@ -98,9 +98,9 @@ StreamDialog::StreamDialog() : QWidget() {
 void StreamDialog::startStream() {
   auto resolution = m_resolutionComboBox->currentData().toString().split('x');
   emit requestedStreamStart(m_videoGroupBox->isChecked(),
-                            m_audioGroupBox->isChecked(),
+                            m_audioGroupBox->isChecked(), resolution[0].toInt(),
-                            resolution[0].toUInt(), resolution[1].toUInt(),
+                            resolution[1].toInt(),
-                            m_framerateComboBox->currentData().toUInt(),
+                            m_framerateComboBox->currentData().toInt(),
                             m_targetComboBox->currentText());
   setHidden(true);
 }

src/streamdialog.h

@@ -19,8 +19,8 @@ private:
   QGroupBox *m_audioGroupBox;
 
 Q_SIGNALS:
-  void requestedStreamStart(bool video, bool audio, uint width, uint height,
+  void requestedStreamStart(bool video, bool audio, int width, int height,
-                            uint frameRate, QString target);
+                            int frameRate, QString target);
 
 public Q_SLOTS:
   void updateTargets();

src/userscript.cpp

@@ -0,0 +1,164 @@
+#include "userscript.h"
+#include "log.h"
+#include "mainwindow.h"
+
+#include <QApplication>
+#include <QDebug>
+#include <QTimer>
+
+#ifdef KXMLGUI
+#include <KActionCollection>
+#endif
+
+UserScript::UserScript() : QObject() {
+  setupHelpMenu();
+  setupShortcutsDialog();
+  setupStreamDialog();
+  setupVirtmic();
+}
+
+void UserScript::setupHelpMenu() {
+#ifdef KXMLGUI
+  m_kxmlgui = true;
+
+  KAboutData aboutData(
+      "discord-screenaudio", "discord-screenaudio",
+      QApplication::applicationVersion(),
+      "Custom Discord client with the ability to stream audio on Linux",
+      KAboutLicense::GPL_V3, "Copyright 2022 (C) Malte Jürgens");
+  aboutData.setBugAddress("https://github.com/maltejur/discord-screenaudio");
+  aboutData.addAuthor("Malte Jürgens", "Author", "maltejur@dismail.de",
+                      "https://github.com/maltejur");
+  aboutData.addCredit("edisionnano",
+                      "For creating and documenting the approach for streaming "
+                      "audio in Discord used in this project.",
+                      QString(),
+                      "https://github.com/edisionnano/"
+                      "Screenshare-with-audio-on-Discord-with-Linux");
+  aboutData.addCredit(
+      "Curve", "For creating the Rohrkabel library used in this project.",
+      QString(), "https://github.com/Curve");
+  aboutData.addComponent("Rohrkabel", "A C++ RAII Pipewire-API Wrapper", "1.3",
+                         "https://github.com/Soundux/rohrkabel");
+  m_helpMenu = new KHelpMenu(MainWindow::instance(), aboutData);
+#endif
+}
+
+void UserScript::setupShortcutsDialog() {
+#ifdef KXMLGUI
+#ifdef KGLOBALACCEL
+  m_kglobalaccel = true;
+
+  auto toggleMuteAction = new QAction(this);
+  toggleMuteAction->setText("Toggle Mute");
+  toggleMuteAction->setIcon(QIcon::fromTheme("microphone-sensitivity-muted"));
+  connect(toggleMuteAction, &QAction::triggered, this,
+          &UserScript::muteToggled);
+
+  auto toggleDeafenAction = new QAction(this);
+  toggleDeafenAction->setText("Toggle Deafen");
+  toggleDeafenAction->setIcon(QIcon::fromTheme("audio-volume-muted"));
+  connect(toggleMuteAction, &QAction::triggered, this,
+          &UserScript::deafenToggled);
+
+  m_actionCollection = new KActionCollection(this);
+  m_actionCollection->addAction("toggleMute", toggleMuteAction);
+  KGlobalAccel::setGlobalShortcut(toggleMuteAction, QList<QKeySequence>{});
+  m_actionCollection->addAction("toggleDeafen", toggleDeafenAction);
+  KGlobalAccel::setGlobalShortcut(toggleDeafenAction, QList<QKeySequence>{});
+
+  m_shortcutsDialog = new KShortcutsDialog(KShortcutsEditor::GlobalAction);
+  m_shortcutsDialog->addCollection(m_actionCollection);
+#endif
+#endif
+}
+
+void UserScript::setupStreamDialog() {
+  connect(&m_streamDialog, &StreamDialog::requestedStreamStart, this,
+          &UserScript::startStream);
+}
+
+void UserScript::setupVirtmic() {
+  m_virtmicProcess.setProcessChannelMode(QProcess::ForwardedChannels);
+}
+
+bool UserScript::isVirtmicRunning() {
+  return m_virtmicProcess.state() != QProcess::NotRunning;
+}
+
+QString UserScript::version() { return QApplication::applicationVersion(); }
+
+QVariant UserScript::getPref(QString name, QVariant fallback) {
+  return MainWindow::instance()->settings()->value(name, fallback);
+}
+
+bool UserScript::getBoolPref(QString name, bool fallback) {
+  return getPref(name, fallback).toBool();
+}
+
+void UserScript::setPref(QString name, QVariant value) {
+  return MainWindow::instance()->settings()->setValue(name, value);
+}
+
+void UserScript::setTrayIcon(bool value) {
+  setPref("trayIcon", value);
+  MainWindow::instance()->setTrayIcon(value);
+}
+
+void UserScript::log(QString message) {
+  qDebug(userscriptLog) << message.toUtf8().constData();
+}
+
+void UserScript::showShortcutsDialog() {
+#ifdef KXMLGUI
+#ifdef KGLOBALACCEL
+  m_shortcutsDialog->show();
+#else
+  QMessageBox::information(MainWindow::instance(), "discord-screenaudio",
+                           "Keybinds are not supported on this platform "
+                           "(KGlobalAccel is not available).",
+                           QMessageBox::Ok);
+#endif
+#else
+  QMessageBox::information(MainWindow::instance(), "discord-screenaudio",
+                           "Keybinds are not supported on this platform "
+                           "(KXmlGui and KGlobalAccel are not available).",
+                           QMessageBox::Ok);
+#endif
+}
+
+void UserScript::showHelpMenu() {
+#ifdef KXMLGUI
+  m_helpMenu->aboutApplication();
+#endif
+}
+
+void UserScript::stopVirtmic() {
+  if (m_virtmicProcess.state() == QProcess::Running) {
+    qDebug(virtmicLog) << "Stopping Virtmic";
+    m_virtmicProcess.kill();
+    m_virtmicProcess.waitForFinished();
+  }
+}
+
+void UserScript::startVirtmic(QString target) {
+  qDebug(virtmicLog) << "Starting Virtmic with target" << target;
+  m_virtmicProcess.start(QApplication::arguments()[0], {"--virtmic", target});
+}
+
+void UserScript::startStream(bool video, bool audio, int width, int height,
+                             int frameRate, QString target) {
+  stopVirtmic();
+  startVirtmic(audio ? target : "[None]");
+  // Wait a bit for the virtmic to start
+  QTimer::singleShot(
+      200, [=]() { emit streamStarted(video, width, height, frameRate); });
+}
+
+void UserScript::showStreamDialog() {
+  if (m_streamDialog.isHidden())
+    m_streamDialog.setHidden(false);
+  else
+    m_streamDialog.activateWindow();
+  m_streamDialog.updateTargets();
+}

src/userscript.h

@@ -0,0 +1,69 @@
+#pragma once
+
+#include "streamdialog.h"
+
+#include <QObject>
+#include <QProcess>
+
+#ifdef KXMLGUI
+#include <KAboutData>
+#include <KHelpMenu>
+#include <KShortcutsDialog>
+#include <KXmlGuiWindow>
+#include <QAction>
+
+#ifdef KGLOBALACCEL
+#include <KGlobalAccel>
+#endif
+
+#endif
+
+class UserScript : public QObject {
+  Q_OBJECT
+
+public:
+  UserScript();
+  bool isVirtmicRunning();
+  Q_PROPERTY(QString version READ version);
+  Q_PROPERTY(bool kxmlgui MEMBER m_kxmlgui);
+  Q_PROPERTY(bool kglobalaccel MEMBER m_kglobalaccel);
+
+private:
+  QProcess m_virtmicProcess;
+  StreamDialog m_streamDialog;
+  bool m_kxmlgui = false;
+  bool m_kglobalaccel = false;
+#ifdef KXMLGUI
+  KHelpMenu *m_helpMenu;
+#ifdef KGLOBALACCEL
+  KActionCollection *m_actionCollection;
+  KShortcutsDialog *m_shortcutsDialog;
+#endif
+#endif
+  void setupHelpMenu();
+  void setupShortcutsDialog();
+  void setupStreamDialog();
+  void setupVirtmic();
+
+Q_SIGNALS:
+  void muteToggled();
+  void deafenToggled();
+  void streamStarted(bool video, int width, int height, int frameRate);
+
+public Q_SLOTS:
+  void log(QString message);
+  QString version();
+  QVariant getPref(QString name, QVariant fallback);
+  bool getBoolPref(QString name, bool fallback);
+  void setPref(QString name, QVariant value);
+  void setTrayIcon(bool value);
+  void showShortcutsDialog();
+  void showHelpMenu();
+  void showStreamDialog();
+  void stopVirtmic();
+  void startVirtmic(QString target);
+
+private Q_SLOTS:
+  void startStream(bool video, bool audio, int width, int height, int frameRate,
+                   QString target);
+};