taskwiki integrates vimwiki with taskwarrior, and in doing so changes
the semantics of checkboxes a bit:
* [ ] Install Taskwiki | pending task
* [X] Install Taskwiki | completed task
* [D] Install Taskwiki | deleted task
* [S] Install Taskwiki | started task
* [W] Install Taskwiki | waiting task
It's still desirable for vimwiki to automatically insert `* [ ]` on
`i_<CR>`, `o` and `O` and to syntax highlight all these five as
checkboxes, so I have this in my .vimrc:
let g:vimwiki_listsym_rejected = 'D'
let g:vimwiki_listsyms = ' WSX'
but it results in undesirable behaviour with task hierarchies: when I
add a new subtask (using `i_<CR>`, `o` or `O`)
or mark a subtask done, the parent's checkbox is updated to reflect its
overall completion, to one of ` `, `W`, `S` or `X`, depending on
subtasks completion. This makes little sense in taskwiki. One usually
doesn't want to touch the "parent" task in taskwarrior until the
"subtasks" are done. Setting
let g:vimwiki_listsym_rejected = 'W'
let g:vimwiki_listsyms = ' SX'
results in slightly less illogical behaviour, but it still assumes that
(1) all subtasks are visible (not necessarily true in taskwiki) and
(2) that it's a parent/subtask relationship, not a dependency
relationship (not true in taskwarrior, questionable in taskwiki).
This commit adds an option to disable this behaviour.