zsh-autosuggestions/src/fetch.zsh
Eric Freese c1910348c7 Implement completion suggestion strategy (#111)
Based on https://github.com/Valodim/zsh-capture-completion

`zpty -r` with a pattern seems to have some funky behavior on older
versions, giving unpredictable results

Don't use `-s` option to `zmodload`. It is not available in zsh versions
older than 5.3

If running in sync mode and a completion takes a long time, the user can
^C out of it. We need to use `always` in the strategy function or the
pty will not be destroyed in this case and the next time we go to create
it, it will fail, making the shell unusable.

User can have many different completion styles set that will modify what
they've already typed. These styles will result in suggestions that
don't match what the user has already typed. We try our best to unset
some of the more problematic ones, but add some code to fetch to
invalidate suggestions that don't match what the user's already typed.
2019-04-11 09:53:55 -06:00

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#--------------------------------------------------------------------#
# Fetch Suggestion #
#--------------------------------------------------------------------#
# Loops through all specified strategies and returns a suggestion
# from the first strategy to provide one.
#
_zsh_autosuggest_fetch_suggestion() {
typeset -g suggestion
local -a strategies
local strategy
# Ensure we are working with an array
strategies=(${=ZSH_AUTOSUGGEST_STRATEGY})
for strategy in $strategies; do
# Try to get a suggestion from this strategy
_zsh_autosuggest_strategy_$strategy "$1"
# Ensure the suggestion matches the prefix
[[ "$suggestion" != "$1"* ]] && unset suggestion
# Break once we've found a valid suggestion
[[ -n "$suggestion" ]] && break
done
}