BLADERUNNER: Allow Esc and Return keys to fire repeatedly (emulated)

Should resolve ticket #11407

https://bugs.scummvm.org/ticket/11407
However, in our commons/events.h currently there are TODO notes about implementing support for repeated firing of keyboard keys so this could be revisited in the future to use that functionality when implemented

engines/bladerunner/bladerunner.cpp

@@ -1284,6 +1284,7 @@ void BladeRunnerEngine::handleEvents() {
 		return;
 	}
 
+	uint32 timeNow = _time->currentSystem();
 	Common::Event event;
 	Common::EventManager *eventMan = _system->getEventManager();
 	while (eventMan->pollEvent(event)) {
@@ -1295,6 +1296,12 @@ void BladeRunnerEngine::handleEvents() {
 		case Common::EVENT_KEYDOWN:
 			// Process the actual key press only and filter out repeats
 			if (!event.kbdRepeat) {
+				// Only for Esc and Return keys, allow repeated firing emulation
+				// First hit (fire) has a bigger delay (kKeyRepeatInitialDelay) before repeated events are fired from the same key
+				if (event.kbd.keycode == Common::KEYCODE_ESCAPE || event.kbd.keycode == Common::KEYCODE_RETURN) {
+					_currentKeyDown = event.kbd.keycode;
+					_keyRepeatTime = timeNow + kKeyRepeatInitialDelay;
+				}
 				handleKeyDown(event);
 			}
 			break;
@@ -1331,9 +1338,24 @@ void BladeRunnerEngine::handleEvents() {
 			; // nothing to do
 		}
 	}
+
+	if ((_currentKeyDown == Common::KEYCODE_ESCAPE || _currentKeyDown == Common::KEYCODE_RETURN) && _keyRepeatTime <= timeNow) {
+		// create a "new" keydown event
+		event.type = Common::EVENT_KEYDOWN;
+		// kbdRepeat field will be unused here since we emulate the kbd repeat behavior anyway, but it's good to set it for consistency
+		event.kbdRepeat = true;
+		event.kbd = _currentKeyDown;
+		_keyRepeatTime = timeNow + kKeyRepeatSustainDelay;
+		handleKeyDown(event);
+	}
 }
 
 void BladeRunnerEngine::handleKeyUp(Common::Event &event) {
+	if (event.kbd.keycode == _currentKeyDown.keycode) {
+		// Only stop firing events if it's the current key
+		_currentKeyDown.keycode = Common::KEYCODE_INVALID;
+	}
+
 	if (!playerHasControl() || _isWalkingInterruptible) {
 		return;
 	}

engines/bladerunner/bladerunner.h

@@ -30,6 +30,7 @@
 #include "common/random.h"
 #include "common/sinetables.h"
 #include "common/stream.h"
+#include "common/keyboard.h"
 
 #include "engines/engine.h"
 
@@ -253,6 +254,17 @@ class BladeRunnerEngine : public Engine {
 
 	uint32 _timeOfMainGameLoopTickPrevious;
 
+	// This addon is to emulate keeping a keyboard key pressed (continuous / repeated firing of the event)
+	// -- code is pretty much identical from our common\events.cpp (KeyboardRepeatEventSourceWrapper)
+	// for continuous events (keyDown)
+	enum {
+		kKeyRepeatInitialDelay = 400,
+		kKeyRepeatSustainDelay = 100
+	};
+
+	Common::KeyState _currentKeyDown;
+	uint32 _keyRepeatTime;
+
 private:
 	MIXArchive _archives[kArchiveCount];