partial Eit Position change

diff --git a/backend.c b/backend.c
index 86c0f15..05306de 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -15735,6 +15735,8 @@ SetBlackToPlayEvent ()
     }
 }
 
+int clearCycle;
+
 void
 EditPositionMenuEvent (ChessSquare selection, int x, int y)
 {
@@ -15769,9 +15771,6 @@ EditPositionMenuEvent (ChessSquare selection, int x, int y)
                                     AAA + x, ONE + y);
                            SendToICS(buf);
                        }
-                   } else if(boards[0][y][x] != DarkSquare) {
-                       if(boards[0][y][x] != p) nonEmpty++;
-                       boards[0][y][x] = p;
                    }
                }
            }
@@ -15787,17 +15786,33 @@ EditPositionMenuEvent (ChessSquare selection, int x, int y)
                menuBoard[CASTLING][0] = menuBoard[CASTLING][3] = NoRights; // h-side Rook was deleted
                DisplayMessage("Clicking clock again restores position", "");
                if(gameInfo.variant != lastVariant) lastVariant = gameInfo.variant, CopyBoard(erasedBoard, boards[0]);
-               if(!nonEmpty) { // asked to clear an empty board
-                   CopyBoard(boards[0], menuBoard);
-               } else
-               if(CompareBoards(currentBoard, menuBoard)) { // asked to clear an empty board
-                   CopyBoard(boards[0], initialPosition);
-               } else
-               if(CompareBoards(currentBoard, initialPosition) && !CompareBoards(currentBoard, erasedBoard)
-                                                                && !CompareBoards(nullBoard, erasedBoard)) {
+printf("cycle = %d\n",clearCycle);
+               switch(clearCycle++) {
+                 case 0:
+                   if(!CompareBoards(currentBoard, initialPosition)) { // initial position if notyet there
+                     CopyBoard(erasedBoard, boards[0]);
+                     CopyBoard(boards[0], initialPosition);
+                     break;
+                   }
+                   clearCycle++;
+                 case 1:
+                   CopyBoard(boards[0], menuBoard); break;
+                 case 2:
+                   for(r = 0; r < BOARD_HEIGHT; r++) {
+                     ChessSquare king = WhiteKing;
+                     for(x = 0; x < BOARD_WIDTH; x++) { // erase except Kings and center
+                       ChessSquare p = (x == BOARD_LEFT-1 || x == BOARD_RGHT ? 0 : EmptySquare);
+                       if((x < BOARD_WIDTH/2 - 2 || x >= BOARD_WIDTH/2 + 2 ||
+                           r < BOARD_HEIGHT/2 - 2 || r >= BOARD_HEIGHT/2 + 2) &&
+                           boards[0][r][x] != king && boards[0][r][x] != king + BlackPawn
+                           && boards[0][r][x] != DarkSquare && boards[0][r][x] != p) boards[0][r][x] = EmptySquare;
+                     }
+                   }
+                   break;
+                 case 3:
                    CopyBoard(boards[0], erasedBoard);
-               } else
-                   CopyBoard(erasedBoard, currentBoard);
+               }
+               clearCycle &= 3; // wrap
 
                for(i=0; i<nrCastlingRights; i++) if(boards[0][CASTLING][i] != NoRights)
                    rightsBoard[castlingRank[i]][boards[0][CASTLING][i]] = 1; // copy remaining rights