loading bar, better ui

src/main.rs

@@ -160,6 +160,39 @@ impl Sudoku {
 		}
     }
 
+    fn propagate_collapse(&mut self, _debug_display: bool) {
+    	let Some(last_choice) = self.history.last() else {
+    		self.update_possibilities();
+    		return
+    	};
+    	
+    	let collapsed_row = last_choice.cell_selected[0];
+    	let collapsed_column = last_choice.cell_selected[1];
+    	
+		let Some(collapsed_value) = self.grid[collapsed_row][collapsed_column].value else {
+			return
+		};
+
+    	let mut collapsed_possibility = HashSet::new();
+    	collapsed_possibility.insert(collapsed_value);
+    	
+    	for column_index in 0..self.size {
+    		self.grid[collapsed_row][column_index].remove_possibilities(&collapsed_possibility);
+    	}
+
+    	for row_index in 0..self.size {
+    		self.grid[row_index][collapsed_column].remove_possibilities(&collapsed_possibility);
+    	}
+
+    	for row_index in 0..self.square_size {
+    		for column_index in 0..self.square_size {
+    			let row = (collapsed_row/self.square_size)*self.square_size + row_index;
+    			let column = (collapsed_column/self.square_size)*self.square_size + column_index;
+    			self.grid[row][column].remove_possibilities(&collapsed_possibility);
+    		}
+    	}
+    }
+
     fn collapse(&mut self, debug_display: bool) -> bool {
 		let mut min_row_index: usize = 0;
 		let mut min_column_index: usize = 0;
@@ -261,15 +294,33 @@ impl Sudoku {
 	    	println!("--------");
 	    }
 
+	    let mut filled_cells_number: usize = 0;
+	    for row in &self.grid {
+	    	for cell in row {
+	    		if !cell.value.is_none() {
+	    			filled_cells_number += 1;
+	    		}
+	    	}
+	    }
+	    
 		println!("# started");
 	    
 	    self.update_possibilities();
 		let mut counter: usize = 0;
 		
 	    while self.collapse(debug_display) {
-	    	self.update_possibilities();
+	    	//self.update_possibilities();
+	    	self.propagate_collapse(debug_display);
 	    	counter +=1;
+
+			if !debug_display {
+				let bar_size = (self.size + self.square_size - 1)*2 + 1;
+		    	let progress = self.history.len()*bar_size/(self.size*self.size - filled_cells_number);
+		    	let to_do = bar_size - progress;
+		    	print!("\r[{}{}]", "#".repeat(progress), "-".repeat(to_do));
 		    }
+	    }
+	    println!();
 
 	    let elapsed = now.elapsed();
 
@@ -295,6 +346,12 @@ impl Sudoku {
 			        None => {}
 			    }
 			}
+			let height = self.size + self.square_size + 2;
+			print!("\x1b[{}A", height);
+			for i in 0..height {
+				println!("{}"," ".repeat((self.size + self.square_size - 1)*2 + 5));
+			}
+			print!("\x1b[{}A", height);
 		}
 	}
 }