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Clarify center scrolling of multi-column lists.

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Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
This commit is contained in:
Andrew Borodin 2016-04-18 14:32:16 +03:00
parent a4b51c3e81
commit 1a5aff3188
2 changed files with 20 additions and 4 deletions
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2
doc/man/mc.1.in
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@ -2094,7 +2094,7 @@ will just scroll a file at a time.
.PP
.I Center scrolling.
If set, panel will scroll when the cursor reaches the middle of the
panel, only hitting the top or bottom of the panel when actually on
panel column, only hitting the top or bottom of the panel when actually on
the first or last file. This behavior applies when scrolling one file
at a time, and does not apply to the page up/down keys.
.PP

22
src/filemanager/panel.c
View File

@ -2081,6 +2081,23 @@ panel_select_ext_cmd (void)
/* --------------------------------------------------------------------------------------------- */
static int
panel_selected_at_half (const WPanel * panel)
{
int lines, top;
lines = panel_lines (panel);
/* define top file of column */
top = panel->top_file;
if (panel->list_cols > 1)
top += lines * ((panel->selected - top) / lines);
return (panel->selected - top - lines / 2);
}
/* --------------------------------------------------------------------------------------------- */
static void
move_down (WPanel * panel)
{
@ -2102,7 +2119,7 @@ move_down (WPanel * panel)
panel->top_file = panel->dir.len - items;
paint_dir (panel);
}
else if (panels_options.scroll_center && (panel->selected - panel->top_file) > (items / 2))
else if (panels_options.scroll_center && panel_selected_at_half (panel) > 0)
{
/* Scroll window when cursor is halfway down */
panel->top_file++;
@ -2131,8 +2148,7 @@ move_up (WPanel * panel)
panel->top_file = 0;
paint_dir (panel);
}
else if (panels_options.scroll_center
&& (panel->selected - panel->top_file) < (panel_items (panel) / 2))
else if (panels_options.scroll_center && panel_selected_at_half (panel) < 0)
{
/* Scroll window when cursor is halfway up */
panel->top_file--;