Improve seal filesearch plugin #301
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Updated the Seal filesearch plugin to resolve a race condition which occurred when a new spotlight search was initiated before the completion of a previous search. This issue resulted in occasional receipt of obsolete `didFinish` spotlight events. To mitigate this, a unique `hs.spotlight` object is now assigned to each new search, and we disregard any event or callback that is not related to the current search. Additionally, the spotlight file search logic has been isolated into a distinct class for improved clarity.
Contrary to most plugins, the Seal filesearch plugin doesn't quickly filter results from an existing set in memory, but it triggers an actual spotlight search each time. That is more resource-intensive and calling it too frequently for each key typed does hurt the responsiveness of the Seal chooser (lua being single-threaded). To avoid that, the plugin now uses it own `queryChangedTimerDuration` parameter so it can be set to higher value compared to the defaut Seal one. The default of 100mn provides a good responsiveness while still display results with an acceptable delay.
Spotlight results naturally put first the items that were recently accessed. However it doesn't put first the item that really contain the word as it (not as a sub-part of the word) whereas it is often the ones you want first typically. We emulate that behaviour by re-ordering the results to boost the item that contains whole words.
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This PR contains several improvements for the Seal filesearch plugin: