Add manualUrl to plugin::Model.

include/app/CableWidget.hpp

@@ -23,10 +23,11 @@ struct CableWidget : widget::OpaqueWidget {
 	CableWidget();
 	~CableWidget();
 	bool isComplete();
-	/** From input/output ports, re-creates a cable and adds it to the Engine. */
+	/** Based on the input/output ports, re-creates the cable and removes/adds it to the Engine. */
 	void updateCable();
 	/** From a cable, sets the input/output ports.
 	Cable must already be added to the Engine.
+	Adopts ownership.
 	*/
 	void setCable(engine::Cable* cable);
 	math::Vec getInputPos();

include/plugin/Model.hpp

@@ -37,6 +37,9 @@ struct Model {
 	std::vector<int> tags;
 	/** A one-line summary of the module's purpose */
 	std::string description;
+	/** The manual of the module. HTML, PDF, or GitHub readme/wiki are fine.
+	*/
+	std::string manualUrl;
 
 	virtual ~Model() {}
 	/** Creates a Module. */

src/plugin/Model.cpp

@@ -37,6 +37,11 @@ void Model::fromJson(json_t* rootJ) {
 		}
 	}
 
+	// manualUrl
+	json_t* manualUrlJ = json_object_get(rootJ, "manualUrl");
+	if (manualUrlJ)
+		manualUrl = json_string_value(manualUrlJ);
+
 	// Preset paths
 	presetPaths.clear();
 	std::string presetDir = asset::plugin(plugin, "presets/" + slug);