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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.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;
}
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