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#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <curses.h>
#include "page.c"
#include "point.c"
#define NORMAL_MODE 0
#define INSERT_MODE 1
struct buffer {
char *name;
struct point start;
struct point cursor;
};
struct buffer *new_buffer(char *name) {
struct buffer *result = calloc(1, sizeof(struct buffer));
result->name = name;
result->start.page = new_page();
result->cursor = result->start;
return result;
}
int main(int argc, char *argv[]) {
initscr();
cbreak();
noecho();
intrflush(stdscr, FALSE);
keypad(stdscr, TRUE);
struct buffer *buffer = new_buffer("test");
struct point window_start = buffer->start;
if (argc > 1) {
FILE *f = fopen(argv[1], "r");
char c;
while ((c = fgetc(f)) != EOF) {
insert_at_point(&buffer->cursor, 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;
struct point window_end = window_start;
while (element(&window_end) && getcury(stdscr) < window_height - 1) {
if (same_point(&window_end, &buffer->cursor)) {
getyx(stdscr, y, x);
}
addch(element(&window_end));
move_point_forward(&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':
prev_line(&buffer->cursor, window_width);
if (y <= 0) {
prev_line(&window_start, window_width);
}
break;
case 'j':
next_line(&buffer->cursor, window_width);
if (y >= window_height - 2) {
next_line(&window_start, window_width);
}
break;
case 'h':
move_point_backward(&buffer->cursor);
break;
case 'l':
move_point_forward(&buffer->cursor);
break;
}
} else {
switch (input) {
case '':
mode = NORMAL_MODE;
break;
case KEY_BACKSPACE:
delete_at_point(&buffer->cursor);
break;
default:
insert_at_point(&buffer->cursor, input);
}
}
if (element(&buffer->cursor) == 0) {
move_point_backward(&buffer->cursor);
}
}
endwin();
return 0;
}
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