Fixed guideline SRS anti-stalling to work closer to guideline games

Currenly behaves similarly to Tetris Friends, lock as soon as it can after exceeding the manipulation limit.
That still allows to have a piece in the air forever in low G though, might be worth looking into it?

tetris/rulesets/standard_exp.lua

@@ -131,6 +131,16 @@ SRS.wallkicks_line = {
 	},
 };
 
+function SRS:check_new_low(piece)
+    for _, block in pairs(piece:getBlockOffsets()) do
+        local y = piece.position.y + block.y
+        if y > piece.lowest_y then
+            piece.manipulations = 0
+            piece.lowest_y = y
+        end
+    end
+end
+
 -- Component functions.
 
 function SRS:attemptWallkicks(piece, new_piece, rot_dir, grid)
@@ -159,19 +169,24 @@ function SRS:attemptWallkicks(piece, new_piece, rot_dir, grid)
 end
 
 function SRS:onPieceCreate(piece, grid)
-	piece.rotate_counter = 0
-	piece.move_counter = 0
+	piece.manipulations = 0
+    piece.lowest_y = -math.huge
 end
 
 function SRS:onPieceDrop(piece, grid)
-	piece.lock_delay = 0 -- step reset
+    self:check_new_low(piece)
+    if piece.manipulations >= 15 and piece:isDropBlocked(grid) then
+        piece.locked = true
+    else
+        piece.lock_delay = 0 -- step reset
+    end
 end
 
 function SRS:onPieceMove(piece, grid)
 	piece.lock_delay = 0 -- move reset
 	if piece:isDropBlocked(grid) then
-		piece.move_counter = piece.move_counter + 1
-		if piece.move_counter >= 24 then
+		piece.manipulations = piece.manipulations + 1
+		if piece.manipulations >= 15 then
 			piece.locked = true
 		end
 	end
@@ -179,9 +194,10 @@ end
 
 function SRS:onPieceRotate(piece, grid)
 	piece.lock_delay = 0 -- rotate reset
+    self:check_new_low(piece)
+    piece.manipulations = piece.manipulations + 1
 	if piece:isDropBlocked(grid) then
-		piece.rotate_counter = piece.rotate_counter + 1
-		if piece.rotate_counter >= 12 then
+		if piece.manipulations >= 15 then
 			piece.locked = true
 		end
 	end