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PluginService as ES6 class (#7075)

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* PluginService as ES6 class
* Review update
This commit is contained in:
Jukka Kurkela 2020-02-09 01:06:49 +02:00 committed by GitHub
parent 9c5a1aabce
commit f5655c511e
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1 changed files with 34 additions and 29 deletions
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43
src/core/core.plugins.js
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@ -22,12 +22,13 @@ defaults._set('plugins', {});
* @namespace Chart.plugins
* @since 2.1.0
*/
export default {
class PluginService {
constructor() {
/**
* Globally registered plugins.
* @private
*/
_plugins: [],
this._plugins = [];
/**
* This identifier is used to invalidate the descriptors cache attached to each chart
@ -35,13 +36,14 @@ export default {
* incremented and descriptors are regenerated during following API calls.
* @private
*/
_cacheId: 0,
this._cacheId = 0;
}
/**
* Registers the given plugin(s) if not already registered.
* @param {IPlugin[]|IPlugin} plugins plugin instance(s).
*/
register: function(plugins) {
register(plugins) {
var p = this._plugins;
([]).concat(plugins).forEach(function(plugin) {
if (p.indexOf(plugin) === -1) {
@ -50,13 +52,13 @@ export default {
});
this._cacheId++;
},
}
/**
* Unregisters the given plugin(s) only if registered.
* @param {IPlugin[]|IPlugin} plugins plugin instance(s).
*/
unregister: function(plugins) {
unregister(plugins) {
var p = this._plugins;
([]).concat(plugins).forEach(function(plugin) {
var idx = p.indexOf(plugin);
@ -66,34 +68,34 @@ export default {
});
this._cacheId++;
},
}
/**
* Remove all registered plugins.
* @since 2.1.5
*/
clear: function() {
clear() {
this._plugins = [];
this._cacheId++;
},
}
/**
* Returns the number of registered plugins?
* @returns {number}
* @since 2.1.5
*/
count: function() {
count() {
return this._plugins.length;
},
}
/**
* Returns all registered plugin instances.
* @returns {IPlugin[]} array of plugin objects.
* @since 2.1.5
*/
getAll: function() {
getAll() {
return this._plugins;
},
}
/**
* Calls enabled plugins for `chart` on the specified hook and with the given args.
@ -104,7 +106,7 @@ export default {
* @param {Array} [args] - Extra arguments to apply to the hook call.
* @returns {boolean} false if any of the plugins return false, else returns true.
*/
notify: function(chart, hook, args) {
notify(chart, hook, args) {
var descriptors = this.descriptors(chart);
var ilen = descriptors.length;
var i, descriptor, plugin, params, method;
@ -123,14 +125,14 @@ export default {
}
return true;
},
}
/**
* Returns descriptors of enabled plugins for the given chart.
* @returns {object[]} [{ plugin, options }]
* @private
*/
descriptors: function(chart) {
descriptors(chart) {
var cache = chart.$plugins || (chart.$plugins = {});
if (cache.id === this._cacheId) {
return cache.descriptors;
@ -167,7 +169,7 @@ export default {
cache.descriptors = descriptors;
cache.id = this._cacheId;
return descriptors;
},
}
/**
* Invalidates cache for the given chart: descriptors hold a reference on plugin option,
@ -175,10 +177,13 @@ export default {
* https://github.com/chartjs/Chart.js/issues/5111#issuecomment-355934167
* @private
*/
_invalidate: function(chart) {
_invalidate(chart) {
delete chart.$plugins;
}
};
}
// singleton instance
export default new PluginService();
/**
* Plugin extension hooks.