void screen_move_down(struct te_buffer *buf)
{
if (buf == NULL)
return;
if (buf->point == blength(buf->contents))
return;
int i = 0;
int old_x = buf->x;
do {
/* move until the first char of the next line */
if (move_right(buf) == ERR)
break;
} while (prev_char(buf) != '\n');
screen_next_line(buf);
/* mimic emacs' behaviour of moving the user to the exact offset we were on */
while (buf->x < old_x && curr_char(buf) != '\n') {
if(screen_move_right(buf) == ERR)
return;
}
move(buf->y, buf->x);
return;
}
void screen_move_up(struct te_buffer *buf)
{
if (buf == NULL)
return;
int i = 0;
int old_x = buf->x;
/* move until the first character of the line */
while(prev_char(buf) != '\n') {
if(move_left(buf) == ERR)
break;
}
move_left(buf);
/* then, move to the beginning of the previous line */
while(prev_char(buf) != '\n') {
if(move_left(buf) == ERR)
break;
}
screen_prev_line(buf);
buf->x = 0;
/* mimic emacs' behaviour of moving the user to the exact offset we were on */
while(buf->x < old_x && next_char(buf) != '\n' && curr_char(buf) != '\n') {
if (screen_move_right(buf) == ERR)
break;
}
move(buf->y, buf->x);
return;
}
void process_command(int c)
{
switch(c) {
case 'q':
exit(0);
case 'h':
case KEY_LEFT:
screen_move_left(current_buf);
break;
case 'l':
case KEY_RIGHT:
screen_move_right(current_buf);
break;
case 'j':
case KEY_DOWN:
screen_move_down(current_buf);
break;
case 'k':
case KEY_UP:
screen_move_up(current_buf);
break;
case 'w':
write_buffer(current_buf);
break;
case 'x':
screen_delete_char(current_buf);
break;
case 'i':
case 0x1B: /* escape */
case KEY_END:
/* switch between command and input mode */
command_mode = 0;
miniprintf("-- INPUT --");
break;
case 'v':
case 'b':
default:
miniprintf("%c - invalid command", c);
break;
}
}
void screen_insert_char(struct te_buffer *buf, char c)
{
if (buf == NULL)
return;
if (buf->dirty < 1)
buf->dirty = 1;
insert_char(buf, c);
if (c == '\n') {
clrtoeol();
clear_nfirst_lines(buffer_win, max(buf->y - 1, 0));
scroll_down(buffer_win);
paint_buffer_nlines(buf, buf->y + 1);
paint_nthline(buf, buf->y + 2, buf->y + 1);
screen_move_right(buf);
} else {
bstring s = current_line_as_bstring(buf->contents, buf->point);
draw_line(s, buf->y);
screen_move_right(buf);
}
}
void process_input(int c)
{
switch(c) {
case KEY_ENTER:
screen_insert_char(current_buf, '\n');
break;
case KEY_BACKSPACE:
screen_delete_char(current_buf);
break;
case KEY_LEFT:
screen_move_left(current_buf);
break;
case KEY_RIGHT:
screen_move_right(current_buf);
break;
case KEY_DOWN:
screen_move_down(current_buf);
break;
case KEY_UP:
screen_move_up(current_buf);
break;
case 0x1B: /* escape */
case KEY_END:
command_mode = 1;
miniprintf("-- COMMAND --");
break;
default:
screen_insert_char(current_buf, c);
refresh();
break;
}
}
