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Fix key binding pagination

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Do not create an empty key bindings page if the number of bindings is a
multiple of the number of slots per page.

Also, add comments to explain the computation.

Reported-by: Kevin Wang <kevin.wang2004@hotmail.com>
Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
This commit is contained in:
Lukas Fleischer 2016-09-27 08:47:26 +02:00
parent 55afda8a73
commit 77d5b10ee0
1 changed files with 17 additions and 4 deletions
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21
src/wins.c
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@ -717,11 +717,24 @@ void wins_erase_status_bar(void)
/* Update the status bar page number to display other commands. */
void wins_other_status_page(int panel)
{
int max_page = bindings_size / (KEYS_CMDS_PER_LINE * 2 - 1) + 1;
/*
* Determine the number of completely filled pages of key bindings.
* There are two lines of bindings and KEYS_CMDS_PER_LINE bindings per
* line. On each page (other than the last page), one slot is reserved
* for OtherCmd.
*/
const int slots_per_page = KEYS_CMDS_PER_LINE * 2 - 1;
int max_page = bindings_size / slots_per_page;
/* There is no "OtherCmd" on the last page. */
if (bindings_size % (KEYS_CMDS_PER_LINE * 2 - 1) == 1)
max_page--;
/*
* The result of the previous computation might have been rounded down.
* In this case, there are some bindings left. If there is exactly one
* binding left, it can be squashed onto the last page in place of the
* OtherCmd binding. If there are at least two bindings left, we need
* to add another page.
*/
if (bindings_size % slots_per_page > 1)
max_page++;
status_page = (status_page % max_page) + 1;
}