fix backspace bug

src/main.odin

@@ -174,9 +174,10 @@ main :: proc() {
 			fmt.println("Wrote file!")
 		}
 
-		if repeatable_key_pressed(r.KeyboardKey.BACKSPACE) {
-			if cursor.line == 0 && cursor.char == 0 do continue
+		skip_backspace: if repeatable_key_pressed(r.KeyboardKey.BACKSPACE) {
+			if cursor.line == 0 && cursor.char == 0 do break skip_backspace
 			if cursor.char == 0 {
+				// join lines
 				old_len := len(lines[cursor.line - 1])
 				append(&lines[cursor.line - 1], string(current_line()[:]))
 				line_to_remove := current_line()^
@@ -185,8 +186,21 @@ main :: proc() {
 				cursor.line -= 1
 				cursor.char = old_len
 			} else {
-				ordered_remove(&lines[cursor.line], cursor.char - 1)
-				cursor.char -= 1
+				if r.IsKeyDown(r.KeyboardKey.LEFT_ALT) {
+					// delete by word
+					delete_to, found := find_previous_space(cursor.char, current_line()[:])
+					if found {
+						remove_range(current_line(), delete_to, cursor.char)
+						cursor.char = delete_to
+					} else {
+						remove_range(current_line(), 0, cursor.char)
+						cursor.char = 0
+					}
+				} else {
+					// delete single char
+					ordered_remove(&lines[cursor.line], cursor.char - 1)
+					cursor.char -= 1
+				}
 			}
 		}