/*
* updateline() - like updateScreen() but only for cursor line
*
* This determines whether or not we need to call updateScreen() to examine
* the entire screen for changes. This occurs if the size of the cursor line
* (in rows) hasn't changed.
*/
void
updateline()
{
int row;
int n;
screenalloc(); /* allocate screen buffers if size changed */
if (Nextscreen == NULL || RedrawingDisabled)
return;
screenchar(NULL, 0, 0); /* init cursor position of screenchar() */
outstr(T_CI); /* disable cursor */
row = screenline(Curpos.lnum, Cline_row, (int)Rows - 1);
outstr(T_CV); /* enable cursor again */
n = row - Cline_row;
if (n != Cline_size) /* line changed size */
{
if (n < Cline_size) /* got smaller: delete lines */
s_del(row, Cline_size - n, FALSE);
else /* got bigger: insert lines */
s_ins(Cline_row + Cline_size, n - Cline_size, FALSE);
updateScreen(VALID_TO_CURSCHAR);
}
}
static void refresh_line(struct line *line, int ypos)
{
char *str = screenline(line->data, NULL) + scrcol;
pos(0, ypos);
str[screenwidth] = 0;
printf("%s%c[K", str, 27);
pos(cursx, cursy);
}
static int do_edit(int argc, char *argv[])
{
int lastscrcol;
int i;
int linepos;
int c;
if (argc != 2)
return COMMAND_ERROR_USAGE;
screenwidth = 80;
screenheight = 25;
/* check if we are called as "sedit" instead of "edit" */
if (*argv[0] == 's') {
smartscroll = 1;
getwinsize();
}
buffer = NULL;
if(edit_read_file(argv[1]))
return 1;
cursx = 0;
cursy = 0;
textx = 0;
scrcol = 0;
curline = buffer;
scrline = curline;
lastscrline = scrline;
lastscrcol = 0;
printf("%c[2J", 27);
pos(0, -1);
printf("%c[7m %-25s <ctrl-d>: Save and quit <ctrl-c>: quit %c[0m",
27, argv[1], 27);
printf("%c[2;%dr", 27, screenheight);
screenheight--; /* status line */
pos(0, 0);
refresh(1);
while (1) {
int curlen = strlen(curline->data);
if (textx > curlen)
textx = curlen;
if (textx < 1)
textx = 0;
screenline(curline->data, &linepos);
if (linepos > scrcol + screenwidth)
scrcol = linepos - screenwidth;
if (scrcol > linepos)
scrcol = linepos;
cursx = linepos - scrcol;
while (cursy >= screenheight) {
cursy--;
scrline = scrline->next;
}
while (cursy < 0) {
cursy++;
scrline = scrline->prev;
}
if (scrline != lastscrline || scrcol != lastscrcol)
refresh(0);
lastscrcol = scrcol;
lastscrline = scrline;
pos(cursx, cursy);
c = read_key();
switch (c) {
case BB_KEY_UP:
if (!curline->prev)
continue;
curline = curline->prev;
cursy--;
textx = setpos(curline->data, linepos);
break;
case BB_KEY_DOWN:
if (!curline->next)
continue;
curline = curline->next;
cursy++;
textx = setpos(curline->data, linepos);
break;
case BB_KEY_RIGHT:
textx++;
break;
case BB_KEY_LEFT:
textx--;
break;
case BB_KEY_HOME:
textx = 0;
break;
case BB_KEY_END:
textx = curlen;
break;
case BB_KEY_PAGEUP:
for (i = 0; i < screenheight - 1; i++) {
if (!curline->prev)
break;
cursy--;
curline = curline->prev;
}
textx = setpos(curline->data, linepos);
break;
case BB_KEY_PAGEDOWN:
for (i = 0; i < screenheight - 1; i++) {
if (!curline->next)
break;
cursy++;
curline = curline->next;
}
textx = setpos(curline->data, linepos);
break;
case BB_KEY_DEL:
if (textx == curlen) {
if (curline->next)
merge_line(curline);
} else
delete_char(textx);
break;
case 13:
case 10:
split_line();
break;
case 127:
case 8:
if (textx > 0) {
textx--;
delete_char(textx);
} else {
if (!curline->prev)
break;
curline = curline->prev;
cursy--;
textx = strlen(curline->data);
merge_line(curline);
}
break;
case 4:
save_file(argv[1]);
goto out;
case 3:
goto out;
default:
if ((signed char)c != -1)
insert_char(c);
}
}
out:
free_buffer();
printf("%c[2J%c[r", 27, 27);
printf("\n");
return 0;
}
