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add support for debouncing leading event #258

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add support for debouncing leading event #258

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14 changes: 12 additions & 2 deletions lib/gaze.js
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@ function Gaze (patterns, opts, done) {
opts = opts || {};
opts.mark = true;
opts.interval = opts.interval || 100;
opts.debounceLeading = (opts.debounceLeading === true || opts.debounceLeading === 'true')
opts.debounceDelay = opts.debounceDelay || 500;
opts.cwd = opts.cwd || process.cwd();
this.options = opts;
Expand Down Expand Up @@ -110,15 +111,24 @@ Gaze.prototype.emit = function () {
// If cached doesnt exist, create a delay before running the next
// then emit the event
const cache = this._cached[filepath] || [];
const emitEvent = (args, e) => {
// Emit the event and `all` event
Gaze.super_.prototype.emit.apply(this, args);
Gaze.super_.prototype.emit.apply(this, ['all', e].concat([].slice.call(args, 1)));
}
if (cache.indexOf(e) === -1) {
helper.objectPush(this._cached, filepath, e);
clearTimeout(timeoutId);
timeoutId = setTimeout(() => {
if (this.options.debounceLeading) {
emitEvent(args, e);
}
delete this._cached[filepath];
}, this.options.debounceDelay);
// Emit the event and `all` event
Gaze.super_.prototype.emit.apply(this, args);
Gaze.super_.prototype.emit.apply(this, ['all', e].concat([].slice.call(args, 1)));
if (!this.options.debounceLeading) {
emitEvent(args, e);
}
}

// Detect if new folder added to trigger for matching files within folder
Expand Down