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authorBenjamin Poirier <bpoirier@suse.de>2012-08-23 14:55:07 -0400
committerMichal Marek <mmarek@suse.cz>2012-09-27 18:09:24 +0200
commit1a374ae6191e9c440f1953a264a94d38173737be (patch)
treed242376e9d1d57e824e9b8c14a71ef5b446ee495 /scripts/kconfig
parent5e609addb1bd963ce1a1929f2012c8dd04ca8620 (diff)
downloadlinaro-lsk-1a374ae6191e9c440f1953a264a94d38173737be.tar.gz
menuconfig: Do not open code textbox scroll up/down
We don't need to explicitely use ncurses' scroll(). ncurses performs vertical-motion optimization at wrefresh() time. Using strace I confirmed that with the following patch curses still sends only the new line of text to the terminal when scrolling up/down one line at a time. Signed-off-by: Benjamin Poirier <bpoirier@suse.de> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts/kconfig')
-rw-r--r--scripts/kconfig/lxdialog/textbox.c55
1 files changed, 11 insertions, 44 deletions
diff --git a/scripts/kconfig/lxdialog/textbox.c b/scripts/kconfig/lxdialog/textbox.c
index 506a095c387..3b3c5c470bf 100644
--- a/scripts/kconfig/lxdialog/textbox.c
+++ b/scripts/kconfig/lxdialog/textbox.c
@@ -166,40 +166,12 @@ do_resize:
case 'K': /* Previous line */
case 'k':
case KEY_UP:
- if (!begin_reached) {
- int passed_end = 0;
-
- back_lines(page_length + 1);
-
- /* We don't call print_page() here but use
- * scrolling to ensure faster screen update.
- * However, 'end_reached' and 'page_length'
- * should still be updated, and 'page' should
- * point to start of next page. This is done
- * by calling get_line() in the following
- * 'for' loop. */
- scrollok(box, TRUE);
- wscrl(box, -1); /* Scroll box region down one line */
- scrollok(box, FALSE);
- page_length = 0;
- for (i = 0; i < boxh; i++) {
- if (!i) {
- /* print first line of page */
- print_line(box, 0, boxw);
- wnoutrefresh(box);
- } else
- /* Called to update 'end_reached' and 'page' */
- get_line();
- if (!passed_end)
- page_length++;
- if (end_reached && !passed_end)
- passed_end = 1;
- }
+ if (begin_reached)
+ break;
- print_position(dialog);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
+ back_lines(page_length + 1);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x);
break;
case 'B': /* Previous page */
case 'b':
@@ -214,17 +186,12 @@ do_resize:
case 'J': /* Next line */
case 'j':
case KEY_DOWN:
- if (!end_reached) {
- begin_reached = 0;
- scrollok(box, TRUE);
- scroll(box); /* Scroll box region up one line */
- scrollok(box, FALSE);
- print_line(box, boxh - 1, boxw);
- wnoutrefresh(box);
- print_position(dialog);
- wmove(dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh(dialog);
- }
+ if (end_reached)
+ break;
+
+ back_lines(page_length - 1);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x);
break;
case KEY_NPAGE: /* Next page */
case ' ':