core/qmlglobal: add clipboard support

src/core/qmlglobal.cpp

@@ -1,6 +1,7 @@
 #include "qmlglobal.hpp"
 #include <utility>
 
+#include <qclipboard.h>
 #include <qcontainerfwd.h>
 #include <qcoreapplication.h>
 #include <qdir.h>
@@ -17,6 +18,7 @@
 #include <qtmetamacros.h>
 #include <qtypes.h>
 #include <qvariant.h>
+#include <qwindowdefs.h>
 #include <unistd.h>
 
 #include "generation.hpp"
@@ -132,6 +134,13 @@ QuickshellGlobal::QuickshellGlobal(QObject* parent): QObject(parent) {
 
 	QObject::connect(QuickshellTracked::instance(), &QuickshellTracked::screensChanged, this, &QuickshellGlobal::screensChanged);
 	// clang-format on
+
+	QObject::connect(
+	    static_cast<QGuiApplication*>(QGuiApplication::instance())->clipboard(), // NOLINT
+	    &QClipboard::changed,
+	    this,
+	    &QuickshellGlobal::onClipboardChanged
+	);
 }
 
 qint32 QuickshellGlobal::processId() const { // NOLINT
@@ -190,6 +199,20 @@ void QuickshellGlobal::setWatchFiles(bool watchFiles) { // NOLINT
 	QuickshellSettings::instance()->setWatchFiles(watchFiles);
 }
 
+QString QuickshellGlobal::clipboardText() {
+	return static_cast<QGuiApplication*>(QGuiApplication::instance())->clipboard()->text(); // NOLINT
+}
+
+void QuickshellGlobal::setClipboardText(const QString& text) {
+	return static_cast<QGuiApplication*>(QGuiApplication::instance()) // NOLINT
+	    ->clipboard()
+	    ->setText(text);
+}
+
+void QuickshellGlobal::onClipboardChanged(QClipboard::Mode mode) {
+	if (mode == QClipboard::Clipboard) emit this->clipboardTextChanged();
+}
+
 QString QuickshellGlobal::dataDir() const { // NOLINT
 	return QsPaths::instance()->shellDataDir().path();
 }

src/core/qmlglobal.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <qclipboard.h>
 #include <qcontainerfwd.h>
 #include <qjsengine.h>
 #include <qobject.h>
@@ -10,6 +11,7 @@
 #include <qtmetamacros.h>
 #include <qtypes.h>
 #include <qvariant.h>
+#include <qwindowdefs.h>
 
 #include "qmlscreen.hpp"
 
@@ -108,6 +110,10 @@ class QuickshellGlobal: public QObject {
 	/// If true then the configuration will be reloaded whenever any files change.
 	/// Defaults to true.
 	Q_PROPERTY(bool watchFiles READ watchFiles WRITE setWatchFiles NOTIFY watchFilesChanged);
+	/// The system clipboard.
+	///
+	/// > [!WARNING] Under wayland the clipboard will be empty unless a quickshell window is focused.
+	Q_PROPERTY(QString clipboardText READ clipboardText WRITE setClipboardText NOTIFY clipboardTextChanged);
 	/// The per-shell data directory.
 	///
 	/// Usually `~/.local/share/quickshell/by-shell/<shell-id>`
@@ -176,6 +182,9 @@ public:
 	[[nodiscard]] bool watchFiles() const;
 	void setWatchFiles(bool watchFiles);
 
+	[[nodiscard]] static QString clipboardText();
+	static void setClipboardText(const QString& text);
+
 	[[nodiscard]] QString dataDir() const;
 	[[nodiscard]] QString stateDir() const;
 	[[nodiscard]] QString cacheDir() const;
@@ -195,6 +204,10 @@ signals:
 	void screensChanged();
 	void workingDirectoryChanged();
 	void watchFilesChanged();
+	void clipboardTextChanged();
+
+private slots:
+	void onClipboardChanged(QClipboard::Mode mode);
 
 private:
 	QuickshellGlobal(QObject* parent = nullptr);