1 files changed, 123 insertions, 0 deletions
diff --git a/jet.cpp b/jet.cpp
new file mode 100644
index 0000000..27d3f74
--- /dev/null
+++ b/jet.cpp
@@ -0,0 +1,123 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <curses.h>
+#include "page.cpp"
+#include "point.cpp"
+
+#define NORMAL_MODE 0
+#define INSERT_MODE 1
+
+struct Buffer {
+	const char *name;
+	Point start;
+	Point cursor;
+
+	Buffer(const char *name) : name(name), start(new Page()), cursor(start) {}
+
+	void prev_line(int window_width) {
+		cursor--;
+		cursor--;
+		cursor.rseek('\n', window_width - 2);
+		if (cursor.element() == '\n') {
+			cursor++;
+		}
+	}
+
+	void next_line(int window_width) {
+		cursor.seek('\n', window_width);
+		if (cursor.element() == '\n') {
+			cursor++;
+		}
+	}
+
+};
+
+int main(int argc, char *argv[]) {
+	initscr();
+	cbreak();
+	noecho();
+	intrflush(stdscr, FALSE);
+	keypad(stdscr, TRUE);
+
+	Buffer buffer = Buffer("test");
+	Point window_start = buffer.start;
+
+	if (argc > 1) {
+		FILE *f = fopen(argv[1], "r");
+		char c;
+		while ((c = fgetc(f)) != EOF) {
+			buffer.cursor.push(c);
+		}
+		buffer.cursor = buffer.start;
+		fclose(f);
+	}
+
+	int window_height, window_width;
+	getmaxyx(stdscr, window_height, window_width);
+
+	int mode = NORMAL_MODE;
+
+	int quit = 0;
+	while (!quit) {
+		clear();
+
+		int x = -1, y = -1;
+		Point window_end = window_start;
+		while (window_end.element() && getcury(stdscr) < window_height - 1) {
+			if (window_end == buffer.cursor) {
+				getyx(stdscr, y, x);
+			}
+			addch(window_end.element());
+			window_end++;
+		}
+		if (x > -1 && y > -1) {
+			move(y, x);
+		}
+
+		int input = getch();
+
+		if (mode == NORMAL_MODE) {
+			switch (input) {
+				case '':
+					quit = 1;
+					break;
+				case 'i':
+					mode = INSERT_MODE;
+					break;
+				case 'k':
+					buffer.prev_line(window_width);
+					break;
+				case 'j':
+					buffer.next_line(window_width);
+					break;
+				case 'h':
+					buffer.cursor--;
+					break;
+				case 'l':
+					buffer.cursor++;
+					break;
+			}
+		} else {
+			switch (input) {
+				case '':
+					mode = NORMAL_MODE;
+					break;
+				case KEY_BACKSPACE:
+					buffer.cursor.pop();
+					break;
+				default:
+					buffer.cursor.push(input);
+			}
+		}
+		if (buffer.cursor.element() == 0) {
+			buffer.cursor--;
+		}
+	}
+
+	endwin();
+	return 0;
+}