Add support for inline scripts

* Script can be defined in the macro segment or loaded from a file
* Supports both LUA and Python
* Can be used for actions and conditions
* obs_script_create and obs_script_destroy are resolved at runtime
  (Let's hope the API remains stable)

plugins/scripting/utils/inline-script.hpp

@@ -0,0 +1,76 @@
+#pragma once
+#include "obs-script-helpers.hpp"
+#include "variable-text-edit.hpp"
+
+#include <memory>
+#include <optional>
+#include <string>
+#include <string_view>
+
+#include <obs-data.h>
+
+namespace advss {
+
+class InlineScript {
+public:
+	InlineScript();
+	InlineScript(const InlineScript &);
+
+	enum Type { INLINE, FILE };
+
+	void Save(obs_data_t *) const;
+	void Load(obs_data_t *);
+
+	void SetType(Type);
+	Type GetType() const { return _type; }
+	void SetLanguage(obs_script_lang);
+	obs_script_lang GetLanguage() const { return _language; }
+	void SetText(const std::string &);
+	const StringVariable &GetText() const;
+	void SetPath(const std::string &);
+	const std::string &GetPath() const { return _file; }
+
+	bool Run();
+
+	void ResolveVariablesToFixedValues();
+
+private:
+	void Setup();
+	void SetupFile();
+	void SetupInline();
+	std::string GetID() const;
+
+	Type _type = INLINE;
+	obs_script_lang _language = OBS_SCRIPT_LANG_PYTHON;
+	std::string _file;
+	StringVariable _textPython = _defaultPythonScript.data();
+	StringVariable _textLUA = _defaultLUAScript.data();
+	std::string _lastResolvedText;
+	std::string _lastPath;
+	std::string _fileId;
+	const uint64_t _instanceId;
+
+	struct ScriptDeleter {
+		void operator()(obs_script_t *);
+		std::string tempScriptPath;
+	};
+	std::unique_ptr<obs_script_t, ScriptDeleter> _script;
+
+	static std::atomic_uint64_t _instanceIdCounter;
+	static const std::string_view _defaultPythonScript;
+	static const std::string_view _defaultLUAScript;
+};
+
+class ScriptEditor : public VariableTextEdit {
+	Q_OBJECT
+public:
+	ScriptEditor(QWidget *parent);
+
+signals:
+	void ScriptChanged();
+
+private:
+	bool eventFilter(QObject *obj, QEvent *event) override;
+};
+
+} // namespace advss