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moving: make PgUp and PgDown functional also in very flat terminals 

Even when the edit window consists of just one or two lines, the PageUp
and PageDown functions (^Y and ^V) should continue to move the window.

This fixes https://savannah.gnu.org/bugs/?48805.
This commit is contained in:
Benno Schulenberg 2016-08-21 15:49:39 +02:00
parent 00b293bf70
commit bd1c5d7c63
1 changed files with 8 additions and 6 deletions
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14
src/move.c
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@ -50,7 +50,7 @@ void do_last_line(void)
/* Move up one page. */
void do_page_up(void)
{
int i, skipped = 0;
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. */
@ -73,8 +73,9 @@ void do_page_up(void)
openfile->placewewant = openfile->current_y = 0;
}
for (i = editwinrows - 2; i - skipped > 0 && openfile->current !=
openfile->fileage; i--) {
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) {
@ -103,7 +104,7 @@ void do_page_up(void)
/* Move down one page. */
void do_page_down(void)
{
int i;
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. */
@ -122,8 +123,9 @@ void do_page_down(void)
openfile->placewewant = openfile->current_y = 0;
}
for (i = maxrows - 2; i > 0 && openfile->current !=
openfile->filebot; i--) {
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, "do_page_down: moving to line %lu\n", (unsigned long)openfile->current->lineno);