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145 lines
4.3 KiB
145 lines
4.3 KiB
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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var watcherManager = require("./watcherManager");
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var EventEmitter = require("events").EventEmitter;
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function Watchpack(options) {
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EventEmitter.call(this);
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if(!options) options = {};
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if(!options.aggregateTimeout) options.aggregateTimeout = 200;
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this.options = options;
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this.watcherOptions = {
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ignored: options.ignored,
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poll: options.poll
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};
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this.fileWatchers = [];
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this.dirWatchers = [];
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this.mtimes = Object.create(null);
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this.paused = false;
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this.aggregatedChanges = [];
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this.aggregatedRemovals = [];
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this.aggregateTimeout = 0;
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this._onTimeout = this._onTimeout.bind(this);
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}
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module.exports = Watchpack;
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Watchpack.prototype = Object.create(EventEmitter.prototype);
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Watchpack.prototype.watch = function watch(files, directories, startTime) {
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this.paused = false;
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var oldFileWatchers = this.fileWatchers;
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var oldDirWatchers = this.dirWatchers;
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this.fileWatchers = files.map(function(file) {
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return this._fileWatcher(file, watcherManager.watchFile(file, this.watcherOptions, startTime));
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}, this);
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this.dirWatchers = directories.map(function(dir) {
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return this._dirWatcher(dir, watcherManager.watchDirectory(dir, this.watcherOptions, startTime));
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}, this);
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oldFileWatchers.forEach(function(w) {
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w.close();
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}, this);
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oldDirWatchers.forEach(function(w) {
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w.close();
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}, this);
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};
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Watchpack.prototype.close = function resume() {
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this.paused = true;
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if(this.aggregateTimeout)
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clearTimeout(this.aggregateTimeout);
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this.fileWatchers.forEach(function(w) {
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w.close();
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}, this);
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this.dirWatchers.forEach(function(w) {
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w.close();
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}, this);
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this.fileWatchers.length = 0;
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this.dirWatchers.length = 0;
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};
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Watchpack.prototype.pause = function pause() {
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this.paused = true;
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if(this.aggregateTimeout)
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clearTimeout(this.aggregateTimeout);
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};
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function addWatchersToArray(watchers, array) {
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watchers.forEach(function(w) {
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if(array.indexOf(w.directoryWatcher) < 0) {
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array.push(w.directoryWatcher);
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addWatchersToArray(Object.keys(w.directoryWatcher.directories).reduce(function(a, dir) {
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if(w.directoryWatcher.directories[dir] !== true)
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a.push(w.directoryWatcher.directories[dir]);
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return a;
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}, []), array);
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}
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});
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}
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Watchpack.prototype.getTimes = function() {
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var directoryWatchers = [];
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addWatchersToArray(this.fileWatchers.concat(this.dirWatchers), directoryWatchers);
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var obj = Object.create(null);
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directoryWatchers.forEach(function(w) {
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var times = w.getTimes();
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Object.keys(times).forEach(function(file) {
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obj[file] = times[file];
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});
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});
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return obj;
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};
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Watchpack.prototype._fileWatcher = function _fileWatcher(file, watcher) {
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watcher.on("change", function(mtime, type) {
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this._onChange(file, mtime, file, type);
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}.bind(this));
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watcher.on("remove", function(type) {
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this._onRemove(file, file, type);
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}.bind(this));
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return watcher;
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};
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Watchpack.prototype._dirWatcher = function _dirWatcher(item, watcher) {
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watcher.on("change", function(file, mtime, type) {
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this._onChange(item, mtime, file, type);
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}.bind(this));
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return watcher;
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};
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Watchpack.prototype._onChange = function _onChange(item, mtime, file) {
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file = file || item;
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this.mtimes[file] = mtime;
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if(this.paused) return;
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this.emit("change", file, mtime);
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if(this.aggregateTimeout)
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clearTimeout(this.aggregateTimeout);
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if(this.aggregatedChanges.indexOf(item) < 0)
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this.aggregatedChanges.push(item);
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this.aggregateTimeout = setTimeout(this._onTimeout, this.options.aggregateTimeout);
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};
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Watchpack.prototype._onRemove = function _onRemove(item, file) {
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file = file || item;
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delete this.mtimes[item];
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if(this.paused) return;
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this.emit("remove", item);
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if(this.aggregateTimeout)
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clearTimeout(this.aggregateTimeout);
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if(this.aggregatedRemovals.indexOf(item) < 0)
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this.aggregatedRemovals.push(item);
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this.aggregateTimeout = setTimeout(this._onTimeout, this.options.aggregateTimeout);
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};
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Watchpack.prototype._onTimeout = function _onTimeout() {
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this.aggregateTimeout = 0;
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var changes = this.aggregatedChanges;
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var removals = this.aggregatedRemovals;
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this.aggregatedChanges = [];
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this.aggregatedRemovals = [];
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this.emit("aggregated", changes, removals);
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};
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