Add modality

1 files changed, 59 insertions, 43 deletions

diff --git a/jet.c b/jet.c
index 3146221..5f7e5b1 100644
--- a/jet.c
+++ b/jet.c
@@ -8,6 +8,9 @@
 #include "page.c"
 #include "point.c"
 
+#define NORMAL_MODE 0
+#define INSERT_MODE 1
+
 int main(int argc, char *argv[]) {
 	initscr();
 	cbreak();
@@ -32,6 +35,8 @@ int main(int argc, char *argv[]) {
 	int window_height, window_width;
 	getmaxyx(stdscr, window_height, window_width);
 
+	int mode = NORMAL_MODE;
+
 	while (1) {
 		clear();
 
@@ -50,51 +55,62 @@ int main(int argc, char *argv[]) {
 
 		int input = getch();
 
-		switch (input) {
-			case KEY_UP:
-				prev_line(&window_start, window_width);
-				prev_line(&cursor, window_width);
-				break;
-			case KEY_DOWN:
-				if (element(&window_end)) {
-					next_line(&window_start, window_width);
-				}
-				next_line(&cursor, window_width);
-				if (same_point(&cursor, &window_end)) {
-					move_point_backward(&cursor);
-				}
-				break;
-			case KEY_LEFT:
-				if (same_point(&cursor, &window_start)) {
+		if (mode == NORMAL_MODE) {
+			switch (input) {
+				case 'i':
+					mode = INSERT_MODE;
+					break;
+				case 'k':
 					prev_line(&window_start, window_width);
-				}
-				move_point_backward(&cursor);
-				break;
-			case KEY_RIGHT:
-				if (same_point(&cursor, &window_end)) {
-					next_line(&window_start, window_width);
-				}
-				move_point_forward(&cursor);
-				if (same_point(&cursor, &window_end)) {
+					prev_line(&cursor, window_width);
+					break;
+				case 'j':
+					if (element(&window_end)) {
+						next_line(&window_start, window_width);
+					}
+					next_line(&cursor, window_width);
+					if (same_point(&cursor, &window_end)) {
+						move_point_backward(&cursor);
+					}
+					break;
+				case 'h':
+					if (same_point(&cursor, &window_start)) {
+						prev_line(&window_start, window_width);
+					}
 					move_point_backward(&cursor);
-				}
-				break;
-			case KEY_BACKSPACE:
-				if (same_point(&cursor, &window_start)) {
-					prev_line(&window_start, window_width);
-				}
-				delete_at_point(&cursor);
-				break;
-			default:
-				if (same_point(&cursor, &window_end)) {
-					next_line(&window_start, window_width);
-				}
-				insert_at_point(&cursor, input);
-				move_point_backward(&cursor);
-				if (element(&cursor) == '\n') {
-					next_line(&window_start, window_width);
-				}
-				move_point_forward(&cursor);
+					break;
+				case 'l':
+					if (same_point(&cursor, &window_end)) {
+						next_line(&window_start, window_width);
+					}
+					move_point_forward(&cursor);
+					if (same_point(&cursor, &window_end)) {
+						move_point_backward(&cursor);
+					}
+					break;
+			}
+		} else {
+			switch (input) {
+				case '':
+					mode = NORMAL_MODE;
+					break;
+				case KEY_BACKSPACE:
+					if (same_point(&cursor, &window_start)) {
+						prev_line(&window_start, window_width);
+					}
+					delete_at_point(&cursor);
+					break;
+				default:
+					if (same_point(&cursor, &window_end)) {
+						next_line(&window_start, window_width);
+					}
+					insert_at_point(&cursor, input);
+					move_point_backward(&cursor);
+					if (element(&cursor) == '\n') {
+						next_line(&window_start, window_width);
+					}
+					move_point_forward(&cursor);
+			}
 		}
 	}