Implement insert mode

main.cpp

@@ -9,6 +9,7 @@
 using std::string;
 using std::vector;
 
+#define ESC 27
 #define adds(s) addstr(s.c_str())
 enum mode_type { insert, normal };
 
@@ -24,7 +25,7 @@ void set(int r, int s, char ch) { file.find(r)->text[s] = ch; }
 void add_line(int r, string text = "") { file.insert(r, text); }
 void remove_line(int r) { file.remove(r); }
 void insert_char(int r, int s, char ch) { file.find(r)->text.insert(s, string{ch}); }
-void remove_char(int r, int s) { file.find(r)->text.erase(s); }
+void remove_char(int r, int s) { file.find(r)->text.erase(s,1); }
 
 // For normal mode not to write to terminal
 void step_back() {
@@ -169,13 +170,21 @@ int main(int argc, char* argv[]) {
 					case 'i':
 						mode = insert;
 						break;
+					case ESC:
+						break;
 				}
 				break;
 			case insert:
+				switch(ch) {
+					case ESC:
+						mode = normal;
+						break;
+					default:
 						insert_char(row, col++, ch);
 						print_line(row);
 						break;
 				}
+		}
 		refresh();
 	}