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term: cursor_{up,down}: limit cursor movements based on origin mode

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Daniel Eklöf 2019-11-16 12:14:58 +01:00
parent aee22dd4b6
commit 81215e5a72
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GPG key ID: 5BBD4992C116573F
1 changed files with 8 additions and 2 deletions
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10
terminal.c
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@ -1060,14 +1060,20 @@ term_cursor_right(struct terminal *term, int count)
void
term_cursor_up(struct terminal *term, int count)
{
int move_amount = min(term->cursor.row, count);
int top = term->origin == ORIGIN_ABSOLUTE ? 0 : term->scroll_region.start;
assert(term->cursor.row >= top);
int move_amount = min(term->cursor.row - top, count);
term_cursor_to(term, term->cursor.row - move_amount, term->cursor.col);
}
void
term_cursor_down(struct terminal *term, int count)
{
int move_amount = min(term->rows - term->cursor.row - 1, count);
int bottom = term->origin == ORIGIN_ABSOLUTE ? term->rows : term->scroll_region.end;
assert(bottom >= term->cursor.row);
int move_amount = min(bottom - term->cursor.row - 1, count);
term_cursor_to(term, term->cursor.row + move_amount, term->cursor.col);
}