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Path: /home/heznutpr/log.heznutprivate.com/dashboard/bower_components/chart.js/src/platforms/

Viewing File: platform.js

'use strict';

var helpers = require('../helpers/index');
var basic = require('./platform.basic');
var dom = require('./platform.dom');

// @TODO Make possible to select another platform at build time.
var implementation = dom._enabled ? dom : basic;

/**
 * @namespace Chart.platform
 * @see https://chartjs.gitbooks.io/proposals/content/Platform.html
 * @since 2.4.0
 */
module.exports = helpers.extend({
	/**
	 * @since 2.7.0
	 */
	initialize: function() {},

	/**
	 * Called at chart construction time, returns a context2d instance implementing
	 * the [W3C Canvas 2D Context API standard]{@link https://www.w3.org/TR/2dcontext/}.
	 * @param {*} item - The native item from which to acquire context (platform specific)
	 * @param {Object} options - The chart options
	 * @returns {CanvasRenderingContext2D} context2d instance
	 */
	acquireContext: function() {},

	/**
	 * Called at chart destruction time, releases any resources associated to the context
	 * previously returned by the acquireContext() method.
	 * @param {CanvasRenderingContext2D} context - The context2d instance
	 * @returns {Boolean} true if the method succeeded, else false
	 */
	releaseContext: function() {},

	/**
	 * Registers the specified listener on the given chart.
	 * @param {Chart} chart - Chart from which to listen for event
	 * @param {String} type - The ({@link IEvent}) type to listen for
	 * @param {Function} listener - Receives a notification (an object that implements
	 * the {@link IEvent} interface) when an event of the specified type occurs.
	 */
	addEventListener: function() {},

	/**
	 * Removes the specified listener previously registered with addEventListener.
	 * @param {Chart} chart -Chart from which to remove the listener
	 * @param {String} type - The ({@link IEvent}) type to remove
	 * @param {Function} listener - The listener function to remove from the event target.
	 */
	removeEventListener: function() {}

}, implementation);

/**
 * @interface IPlatform
 * Allows abstracting platform dependencies away from the chart
 * @borrows Chart.platform.acquireContext as acquireContext
 * @borrows Chart.platform.releaseContext as releaseContext
 * @borrows Chart.platform.addEventListener as addEventListener
 * @borrows Chart.platform.removeEventListener as removeEventListener
 */

/**
 * @interface IEvent
 * @prop {String} type - The event type name, possible values are:
 * 'contextmenu', 'mouseenter', 'mousedown', 'mousemove', 'mouseup', 'mouseout',
 * 'click', 'dblclick', 'keydown', 'keypress', 'keyup' and 'resize'
 * @prop {*} native - The original native event (null for emulated events, e.g. 'resize')
 * @prop {Number} x - The mouse x position, relative to the canvas (null for incompatible events)
 * @prop {Number} y - The mouse y position, relative to the canvas (null for incompatible events)
 */