Add Stream Deck condition type

The Stream Deck plugin to enable communication with the Advanced Scene
Switcher can be found here:
https://github.com/WarmUpTill/advanced-scene-switcher-streamdeck-plugin

plugins/stream-deck/macro-condition-stream-deck.hpp

@@ -0,0 +1,116 @@
+#pragma once
+#include "macro-condition-edit.hpp"
+#include "message-buffer.hpp"
+#include "message-dispatcher.hpp"
+#include "regex-config.hpp"
+#include "variable-spinbox.hpp"
+#include "variable-text-edit.hpp"
+
+#include <QPushButton>
+
+namespace advss {
+
+struct StreamDeckMessage {
+	bool keyDown = true;
+	int row = 0;
+	int column = 0;
+	std::string data = "";
+};
+
+using StreamDeckMessageBuffer =
+	std::shared_ptr<MessageBuffer<StreamDeckMessage>>;
+using StreamDeckMessageDispatcher = MessageDispatcher<StreamDeckMessage>;
+[[nodiscard]] StreamDeckMessageBuffer RegisterForStreamDeckMessages();
+
+class MacroConditionStreamdeck : public MacroCondition {
+public:
+	MacroConditionStreamdeck(Macro *m);
+	bool CheckCondition();
+	bool Save(obs_data_t *obj) const;
+	bool Load(obs_data_t *obj);
+	std::string GetId() const { return id; };
+	static std::shared_ptr<MacroCondition> Create(Macro *m)
+	{
+		return std::make_shared<MacroConditionStreamdeck>(m);
+	}
+
+	struct StreamDeckMessagePattern {
+		void Save(obs_data_t *) const;
+		void Load(obs_data_t *);
+
+		bool checkKeyState = true;
+		bool keyDown = true;
+		bool checkPosition = true;
+		IntVariable row;
+		IntVariable column;
+		bool checkData = true;
+		StringVariable data;
+		RegexConfig regex;
+	};
+	StreamDeckMessagePattern _pattern;
+
+private:
+	void SetTempVarValues(const StreamDeckMessage &);
+	void SetupTempVars();
+	bool MessageMatches(const StreamDeckMessage &);
+
+	// Keep track of the key state so that the condition can still evaluate
+	// to true while the key is held down.
+	bool _lastMatchingKeyIsStillPressed = false;
+
+	StreamDeckMessageBuffer _messageBuffer;
+
+	static bool _registered;
+	static const std::string id;
+};
+
+class MacroConditionStreamdeckEdit : public QWidget {
+	Q_OBJECT
+
+public:
+	MacroConditionStreamdeckEdit(
+		QWidget *parent,
+		std::shared_ptr<MacroConditionStreamdeck> cond = nullptr);
+	void UpdateEntryData();
+	static QWidget *Create(QWidget *parent,
+			       std::shared_ptr<MacroCondition> cond)
+	{
+		return new MacroConditionStreamdeckEdit(
+			parent,
+			std::dynamic_pointer_cast<MacroConditionStreamdeck>(
+				cond));
+	}
+
+private slots:
+	void CheckKeyStateChanged(int);
+	void KeyStateChanged(int);
+	void CheckPositionChanged(int);
+	void RowChanged(const IntVariable &);
+	void ColumnChanged(const IntVariable &);
+	void CheckDataChanged(int);
+	void RegexChanged(const RegexConfig &);
+	void DataChanged();
+	void ListenClicked();
+
+private:
+	void SetWidgetVisibility();
+
+	QCheckBox *_checkKeyState;
+	QComboBox *_keyState;
+	QCheckBox *_checkPosition;
+	VariableSpinBox *_row;
+	VariableSpinBox *_column;
+	QCheckBox *_checkData;
+	VariableTextEdit *_data;
+	RegexConfigWidget *_regex;
+	QPushButton *_listen;
+
+	bool _isListening = false;
+	StreamDeckMessageBuffer _messageBuffer;
+	QTimer _updateListenSettings;
+
+	std::shared_ptr<MacroConditionStreamdeck> _entryData;
+	bool _loading = true;
+};
+
+} // namespace advss