1 files changed, 54 insertions, 35 deletions

diff --git a/indra/newview/llviewerkeyboard.cpp b/indra/newview/llviewerkeyboard.cpp
index 8a5a5e99c9..db0da19927 100644
--- a/indra/newview/llviewerkeyboard.cpp
+++ b/indra/newview/llviewerkeyboard.cpp
@@ -83,82 +83,101 @@ void agent_push_down( EKeystate s )
 	gAgent.moveUp(-1);
 }
 
-void agent_push_forward( EKeystate s )
+static void agent_handle_doubletap_run(EKeystate s, LLAgent::EDoubleTapRunMode mode)
 {
-	if( KEYSTATE_UP == s  ) return;
-	F32 time = gKeyboard->getCurKeyElapsedTime();
-	S32 frame_count = llround(gKeyboard->getCurKeyElapsedFrameCount());
-
-	if( time < NUDGE_TIME || frame_count <= NUDGE_FRAMES)
+	if (KEYSTATE_UP == s)
 	{
-		gAgent.moveAtNudge(1);
+		// Releasing a walk-key resets the double-tap timer
+		gAgent.mDoubleTapRunTimer.reset();
+		if (gAgent.mDoubleTapRunMode == mode &&
+		    gAgent.getRunning() &&
+		    !gAgent.getAlwaysRun())
+		{
+			// Turn off temporary running.
+			gAgent.clearRunning();
+			gAgent.sendWalkRun(gAgent.getRunning());
+		}
+		gAgent.mDoubleTapRunMode = mode;
 	}
-	else
+	else if (KEYSTATE_DOWN == s &&
+		 gAgent.mDoubleTapRunMode == mode &&
+		 gAgent.mDoubleTapRunTimer.getElapsedTimeF32() < NUDGE_TIME)
 	{
-		gAgent.moveAt(1);
+		// Same walk-key was pushed again quickly; this is a double-tap
+		// so engage temporary running.
+		gAgent.setRunning();
+		gAgent.sendWalkRun(gAgent.getRunning());
 	}
 }
 
-
-void agent_push_backward( EKeystate s )
+static void agent_push_forwardbackward( EKeystate s, S32 direction, LLAgent::EDoubleTapRunMode mode )
 {
-	if( KEYSTATE_UP == s  ) return;
-	S32 frame_count = llround(gKeyboard->getCurKeyElapsedFrameCount());
+	agent_handle_doubletap_run(s, mode);
+	if (KEYSTATE_UP == s) return;
+
 	F32 time = gKeyboard->getCurKeyElapsedTime();
+	S32 frame_count = llround(gKeyboard->getCurKeyElapsedFrameCount());
 
 	if( time < NUDGE_TIME || frame_count <= NUDGE_FRAMES)
 	{
-		gAgent.moveAtNudge(-1);
+		gAgent.moveAtNudge(direction);
 	}
 	else
 	{
-		gAgent.moveAt(-1);
+		gAgent.moveAt(direction);
 	}
 }
 
-void agent_slide_left( EKeystate s )
+void agent_push_forward( EKeystate s )
 {
-	if( KEYSTATE_UP == s  ) return;
+	agent_push_forwardbackward(s, 1, LLAgent::DOUBLETAP_FORWARD);
+}
+
+
+void agent_push_backward( EKeystate s )
+{
+	agent_push_forwardbackward(s, -1, LLAgent::DOUBLETAP_BACKWARD);
+}
+
+static void agent_slide_leftright( EKeystate s, S32 direction, LLAgent::EDoubleTapRunMode mode )
+{
+	agent_handle_doubletap_run(s, mode);
+	if( KEYSTATE_UP == s ) return;
 	F32 time = gKeyboard->getCurKeyElapsedTime();
 	S32 frame_count = llround(gKeyboard->getCurKeyElapsedFrameCount());
 
 	if( time < NUDGE_TIME || frame_count <= NUDGE_FRAMES)
 	{
-		gAgent.moveLeftNudge(1);
+		gAgent.moveLeftNudge(direction);
 	}
 	else
 	{
-		gAgent.moveLeft(1);
+		gAgent.moveLeft(direction);
 	}
 }
 
 
-void agent_slide_right( EKeystate s )
+void agent_slide_left( EKeystate s )
 {
-	if( KEYSTATE_UP == s  ) return;
-	F32 time = gKeyboard->getCurKeyElapsedTime();
-	S32 frame_count = llround(gKeyboard->getCurKeyElapsedFrameCount());
+	agent_slide_leftright(s, 1, LLAgent::DOUBLETAP_SLIDELEFT);
+}
 
-	if( time < NUDGE_TIME || frame_count <= NUDGE_FRAMES)
-	{
-		gAgent.moveLeftNudge(-1);
-	}
-	else
-	{
-		gAgent.moveLeft(-1);
-	}
+
+void agent_slide_right( EKeystate s )
+{
+	agent_slide_leftright(s, -1, LLAgent::DOUBLETAP_SLIDERIGHT);
 }
 
 void agent_turn_left( EKeystate s )
 {
-	if( KEYSTATE_UP == s  ) return;
-	F32 time = gKeyboard->getCurKeyElapsedTime();
 	if (gToolCamera->mouseSteerMode())
 	{
 		agent_slide_left(s);
 	}
 	else
 	{
+		if (KEYSTATE_UP == s) return;
+		F32 time = gKeyboard->getCurKeyElapsedTime();
 		gAgent.moveYaw( LLFloaterMove::getYawRate( time ) );
 	}
 }
@@ -166,14 +185,14 @@ void agent_turn_left( EKeystate s )
 
 void agent_turn_right( EKeystate s )
 {
-	if( KEYSTATE_UP == s  ) return;
-	F32 time = gKeyboard->getCurKeyElapsedTime();
 	if (gToolCamera->mouseSteerMode())
 	{
 		agent_slide_right(s);
 	}
 	else
 	{
+		if (KEYSTATE_UP == s) return;
+		F32 time = gKeyboard->getCurKeyElapsedTime();
 		gAgent.moveYaw( -LLFloaterMove::getYawRate( time ) );
 	}
 }