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top: allow collapsible forest view children, pgm logic

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The issue cited below really dealt with preserving the
'Other filter' criteria in the rcfile. But as an aside
the htop 'F6' feature (collapsed children) was raised.

I took that as an implied challenge and decided to try
implementing a similar feature in top. So, this commit
will now provide a brand new forest view toggle ('^V')
which will be used to collapse/expand forked children.

[ this patch will also lead to additional patches in ]
[ support of more rational vertical scrolling, since ]
[ many more tasks might now be hidden in some window ]

Reference(s):
. where this secondary issue was raised
https://gitlab.com/procps-ng/procps/issues/99

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner
2018-06-19 00:00:00 -05:00
committed by Craig Small
parent 57f0ff367c
commit 14eb7275d9
4 changed files with 88 additions and 11 deletions
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top/top_nls.h
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@@ -82,7 +82,8 @@ enum norm_nls {
WORD_abv_mem_txt, WORD_abv_swp_txt, WORD_allcpus_txt, WORD_another_txt,
WORD_eachcpu_fmt, WORD_exclude_txt, WORD_include_txt, WORD_noneone_txt,
WORD_process_txt, WORD_threads_txt, WRITE_rcfile_fmt, WRONG_switch_fmt,
XTRA_badflds_fmt, XTRA_fixwide_fmt, XTRA_warncfg_txt, XTRA_winsize_txt,
XTRA_badflds_fmt, XTRA_fixwide_fmt, XTRA_vforest_fmt, XTRA_warncfg_txt,
XTRA_winsize_txt,
#ifndef INSP_OFFDEMO
YINSP_demo01_txt, YINSP_demo02_txt, YINSP_demo03_txt, YINSP_deqfmt_txt,
YINSP_deqtyp_txt, YINSP_dstory_txt,