KEYMAPPER: Add non-key inputs to HardwareInput

backends/keymapper/hardware-input.h

@@ -34,6 +34,15 @@
 
 namespace Common {
 
+typedef uint32 HardwareInputCode;
+
+enum HardwareInputType {
+	/** Input that sends single events */
+	kHardwareInputTypeGeneric,
+	/** Input that usually send -up and -down events */
+	kHardwareInputTypeKeyboard
+};
+
 /**
 * Describes an available hardware input
 */
@@ -44,14 +53,33 @@ struct HardwareInput {
 	/** Human readable description */
 	String description;
 
+	const HardwareInputType type;
+
 	/**
-	* The KeyState that is generated by the back-end
-	* when this hardware key is pressed.
-	*/
+	 * A platform specific unique identifier for an input event
+	 * generated when this input is triggered.
+	 * This is only relevant when type == kHardwareInputTypeGeneric
+	 */
+	HardwareInputCode inputCode;
+
+	/**
+	 * The KeyState that is generated by the back-end
+	 * when this hardware key is pressed.
+	 * This is only relevant when type == kHardwareInputTypeKeyboard
+	 */
 	KeyState key;
 
-	HardwareInput(String i, KeyState ky = KeyState(), String desc = "")
-		: id(i), key(ky), description(desc) { }
+	HardwareInput(String i, HardwareInputCode ic = 0, String desc = "")
+		: id(i), inputCode(ic), description(desc), type(kHardwareInputTypeGeneric) { }
+
+	HardwareInput(String i, KeyState ky, String desc = "")
+		: id(i), key(ky), description(desc), type(kHardwareInputTypeKeyboard) { }
+};
+
+struct HardwareInputTableEntry {
+	const char *hwId;
+	HardwareInputCode code;
+	const char *desc;
 };
 
 /**
@@ -97,12 +125,20 @@ public:
 
 	const HardwareInput *findHardwareInput(String id) const;
 
+	const HardwareInput *findHardwareInput(const HardwareInputCode code) const;
+
 	const HardwareInput *findHardwareInput(const KeyState& keystate) const;
 
 	const List<const HardwareInput *> &getHardwareInputs() const { return _inputs; }
 
 	uint size() const { return _inputs.size(); }
 
+	/**
+	 * Add hardware inputs to the set out of a table.
+	 * @param inputs       table of available inputs
+	 */
+	void addHardwareInputs(const HardwareInputTableEntry inputs[]);
+
 	/**
 	 * Add hardware inputs to the set out of key and modifier tables.
 	 * @param keys       table of available keys
@@ -110,13 +146,6 @@ public:
 	 */
 	void addHardwareInputs(const KeyTableEntry keys[], const ModifierTableEntry modifiers[]);
 
-	/**
-	 * Add hardware inputs to the set out of a key table.
-	 * The default modifiers are applied to the key entries
-	 * @param keys       table of available keys
-	 */
-	void addHardwareInputs(const KeyTableEntry keys[]);
-
 	void removeHardwareInput(const HardwareInput *input);
 
 private: