/* Move down one page. */
void do_page_down(void)
{
int i, mustmove;
/* If the cursor is less than a page away from the bottom of the file,
* put it at the end of the last line. */
if (openfile->current->lineno + maxrows - 2 >= openfile->filebot->lineno) {
do_last_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 = (maxrows < 3) ? 1 : maxrows - 2;
for (i = mustmove; i > 0 && openfile->current != openfile->filebot; i--) {
openfile->current = openfile->current->next;
#ifdef DEBUG
fprintf(stderr, "paging down: moving to line %lu\n", (unsigned long)openfile->current->lineno);
#endif
}
openfile->current_x = actual_x(openfile->current->data,
openfile->placewewant);
/* Scroll the edit window down a page. */
adjust_viewport(STATIONARY);
refresh_needed = TRUE;
}
/* Make sure that the current line, when it is partially scrolled off the
* screen in softwrap mode, is scrolled fully into view. */
void ensure_line_is_visible(void)
{
#ifndef NANO_TINY
if (ISSET(SOFTWRAP) && strlenpt(openfile->current->data) / editwincols +
openfile->current_y >= editwinrows) {
adjust_viewport(ISSET(SMOOTH_SCROLL) ? FLOWING : CENTERING);
refresh_needed = TRUE;
}
#endif
}
/* 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;
}
static void resize_callback(GLFWwindow *window, int width, int height)
{
adjust_viewport(window, width, height);
cam3_on_window_resize(width, height);
}
