feat(fit-preview): optionally double comp_length when showing preview

[jimeh]

Note: This was a 5 minute hack just to see if I could fix it, so more than happy to hear any feedback and change things as needed :)

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When previews are enabled, they typically take up half the width of the popup. This adds an option to make it double the width when preview is enabled, hence ensuring that the full text of completion items are visible.

Screenshots

Before

With preview:

Without preview:

After

With preview:

Without preview:

[z0rc]

@Aloxaf ping. Currently ftb-tmux-popup isn't usable together with fzf-preview.

[Sneethe]

Very cool. This solves my main gripe with fzf-tab.

But I wonder, would it be difficult to trigger resizing the popup pane when toggling the preview?

I use fzf-tab-source for rich preview windows, but they're more something you want to toggle on when needed rather than having them always on. Meaning the pane will always be double its necessary width, just for the off chance the preview is toggled on.

[Sneethe]

Very crude POC

tmux display-popup -E -w 40% -h 70% -x 10% -y 10% "fzf" &
sleep 5                 
kill $(pgrep -n "fzf")
sleep .1 
tmux display-popup -E -w 80% -h 70% -x 10% -y 10% "fzf"

[Sneethe]

No need for the first hunk if you do this:

if zstyle -t ":fzf-tab:$_ftb_curcontext" popup-fit-preview && zstyle -m ":fzf-tab:$_ftb_curcontext" fzf-preview '*'; then
  comp_length=$(( comp_length * 2 ))
fi

Works the exact same.