/* Move up one page. */
void do_page_up(void)
{
int i;
/* If there's less than a page of text left on the screen, put the
* cursor at the beginning of the first line of the file, and then
* update the edit window. */
if (openfile->current->lineno <= editwinrows - 2) {
do_first_line();
return;
}
/* If we're not in smooth scrolling mode, put the cursor at the
* beginning of the top line of the edit window, as Pico does. */
#ifndef NANO_TINY
if (!ISSET(SMOOTH_SCROLL)) {
#endif
openfile->current = openfile->edittop;
openfile->placewewant = 0;
#ifndef NANO_TINY
}
#endif
for (i = editwinrows - 2; i > 0 && openfile->current !=
openfile->fileage; i--)
openfile->current = openfile->current->prev;
openfile->current_x = actual_x(openfile->current->data,
openfile->placewewant);
/* Scroll the edit window up a page. */
edit_scroll(UP_DIR, editwinrows - 2);
}
/* Move up one page. */
void do_page_up(void)
{
int i, skipped = 0;
/* If there's less than a page of text left on the screen, put the
* cursor at the beginning of the first line of the file, and then
* update the edit window. */
if (openfile->current->lineno == 1 || (
#ifndef NANO_TINY
!ISSET(SOFTWRAP) &&
#endif
openfile->current->lineno <= editwinrows - 2)) {
do_first_line();
return;
}
/* If we're not in smooth scrolling mode, put the cursor at the
* beginning of the top line of the edit window, as Pico does. */
#ifndef NANO_TINY
if (!ISSET(SMOOTH_SCROLL)) {
#endif
openfile->current = openfile->edittop;
openfile->placewewant = openfile->current_y = 0;
#ifndef NANO_TINY
}
#endif
for (i = editwinrows - 2; i - skipped > 0 && openfile->current !=
openfile->fileage; i--) {
openfile->current = openfile->current->prev;
#ifndef NANO_TINY
if (ISSET(SOFTWRAP) && openfile->current) {
skipped += strlenpt(openfile->current->data) / COLS;
#ifdef DEBUG
fprintf(stderr, "do_page_up: i = %d, skipped = %d based on line %ld len %lu\n",
i, skipped, (long)openfile->current->lineno, (unsigned long)strlenpt(openfile->current->data));
#endif
}
#endif
}
openfile->current_x = actual_x(openfile->current->data,
openfile->placewewant);
#ifdef DEBUG
fprintf(stderr, "do_page_up: openfile->current->lineno = %lu, skipped = %d\n",
(unsigned long)openfile->current->lineno, skipped);
#endif
/* Scroll the edit window up a page. */
edit_update(NONE);
}
/* Move up one page. */
void do_page_up(void)
{
int i, mustmove, skipped = 0;
/* If the cursor is less than a page away from the top of the file,
* put it at the beginning of the first line. */
if (openfile->current->lineno == 1 || (!ISSET(SOFTWRAP) &&
openfile->current->lineno <= editwinrows - 2)) {
do_first_line();
return;
}
/* If we're not in smooth scrolling mode, put the cursor at the
* beginning of the top line of the edit window, as Pico does. */
if (!ISSET(SMOOTH_SCROLL)) {
openfile->current = openfile->edittop;
openfile->placewewant = openfile->current_y = 0;
}
mustmove = (editwinrows < 3) ? 1 : editwinrows - 2;
for (i = mustmove; i - skipped > 0 && openfile->current != openfile->fileage; i--) {
openfile->current = openfile->current->prev;
#ifndef NANO_TINY
if (ISSET(SOFTWRAP) && openfile->current) {
skipped += strlenpt(openfile->current->data) / editwincols;
#ifdef DEBUG
fprintf(stderr, "paging up: i = %d, skipped = %d based on line %ld len %lu\n",
i, skipped, (long)openfile->current->lineno, (unsigned long)strlenpt(openfile->current->data));
#endif
}
#endif
}
openfile->current_x = actual_x(openfile->current->data,
openfile->placewewant);
/* Scroll the edit window up a page. */
adjust_viewport(STATIONARY);
refresh_needed = TRUE;
}
