wavesurfer.js
Version:
Interactive navigable audio visualization using Web Audio and Canvas
411 lines (363 loc) • 15.3 kB
JavaScript
/*!
* wavesurfer.js 2.0.5 (Sun Mar 04 2018 20:10:04 GMT+0100 (CET))
* https://github.com/katspaugh/wavesurfer.js
* @license BSD-3-Clause
*/
(function webpackUniversalModuleDefinition(root, factory) {
if(typeof exports === 'object' && typeof module === 'object')
module.exports = factory();
else if(typeof define === 'function' && define.amd)
define("html-init", [], factory);
else if(typeof exports === 'object')
exports["html-init"] = factory();
else
root["WaveSurfer"] = root["WaveSurfer"] || {}, root["WaveSurfer"]["html-init"] = factory();
})(typeof self !== 'undefined' ? self : this, function() {
return /******/ (function(modules) { // webpackBootstrap
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/* 0 */
/***/ (function(module, exports, __webpack_require__) {
;
Object.defineProperty(exports, "__esModule", {
value: true
});
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _loadScript = __webpack_require__(1);
var _loadScript2 = _interopRequireDefault(_loadScript);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
/**
* @typedef {Object} InitParams
* @property {WavesurferParams} [defaults={backend: 'MediaElement,
* mediaControls: true}] The default wavesurfer initialisation parameters
* @property {string|NodeList} containers='wavesurfer' Selector or NodeList of
* elements to attach instances to
* @property {string}
* pluginCdnTemplate='//localhost:8080/dist/plugin/wavesurfer.[name].js' URL
* template for the dynamic loading of plugins
* @property {function} loadPlugin If set overwrites the default ajax function,
* can be used to inject plugins differently.
*/
/**
* The HTML initialisation API is not part of the main library bundle file and
* must be additionally included.
*
* The API attaches wavesurfer instances to all `<wavesurfer>` (can be
* customised), parsing their `data-` attributes to construct an options object
* for initialisation. Among other things it can dynamically load plugin code.
*
* The automatic initialisation can be prevented by setting the
* `window.WS_StopAutoInit` flag to true. The `html-init[.min].js` file exports
* the `Init` class, which can be called manually.
*
* Site-wide defaults can be added by setting `window.WS_InitOptions`.
*
* @example
* <!-- with minimap and timeline plugin -->
* <wavesurfer
* data-url="../media/demo.wav"
* data-plugins="minimap,timeline"
* data-minimap-height="30"
* data-minimap-wave-color="#ddd"
* data-minimap-progress-color="#999"
* data-timeline-font-size="13px"
* data-timeline-container="#timeline"
* >
* </wavesurfer>
* <div id="timeline"></div>
*
* <!-- with regions plugin -->
* <wavesurfer
* data-url="../media/demo.wav"
* data-plugins="regions"
* data-regions-regions='[{"start": 1,"end": 3,"color": "hsla(400, 100%, 30%, 0.5)"}]'
* >
* </wavesurfer>
*/
var Init = function () {
/**
* Instantiate Init class and initialise elements
*
* This is done automatically if `window` is defined and
* `window.WS_StopAutoInit` is not set to true
*
* @param {WaveSurfer} WaveSurfer The WaveSurfer library object
* @param {InitParams} params initialisation options
*/
function Init(WaveSurfer) {
var params = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
_classCallCheck(this, Init);
if (!WaveSurfer) {
throw new Error('WaveSurfer is not available!');
}
/**
* cache WaveSurfer
* @private
*/
this.WaveSurfer = WaveSurfer;
/**
* build parameters, cache them in _params so minified builds are smaller
* @private
*/
var _params = this.params = WaveSurfer.util.extend({}, {
// wavesurfer parameter defaults so by default the audio player is
// usable with native media element controls
defaults: {
backend: 'MediaElement',
mediaControls: true
},
// containers to instantiate on, can be selector string or NodeList
containers: 'wavesurfer',
// @TODO insert plugin CDN URIs
pluginCdnTemplate: '//localhost:8080/dist/plugin/wavesurfer.[name].js',
// loadPlugin function can be overriden to inject plugin definition
// objects, this default function uses load-script to load a plugin
// and pass it to a callback
loadPlugin: function loadPlugin(name, cb) {
var src = _params.pluginCdnTemplate.replace('[name]', name);
(0, _loadScript2.default)(src, { async: false }, function (err, plugin) {
if (err) {
return console.error('WaveSurfer plugin ' + name + ' not found at ' + src);
}
cb(window.WaveSurfer[name]);
});
}
}, params);
/**
* The nodes that should have instances attached to them
* @type {NodeList}
*/
this.containers = typeof _params.containers == 'string' ? document.querySelectorAll(_params.containers) : _params.containers;
/** @private */
this.pluginCache = {};
/**
* An array of wavesurfer instances
* @type {Object[]}
*/
this.instances = [];
this.initAllEls();
}
/**
* Initialise all container elements
*/
_createClass(Init, [{
key: 'initAllEls',
value: function initAllEls() {
var _this = this;
// iterate over all the container elements
Array.prototype.forEach.call(this.containers, function (el) {
// load the plugins as an array of plugin names
var plugins = el.dataset.plugins ? el.dataset.plugins.split(',') : [];
// no plugins to be loaded, just render
if (!plugins.length) {
return _this.initEl(el);
}
// … or: iterate over all the plugins
plugins.forEach(function (name, i) {
// plugin is not cached already, load it
if (!_this.pluginCache[name]) {
_this.params.loadPlugin(name, function (lib) {
_this.pluginCache[name] = lib;
// plugins were all loaded, render the element
if (i + 1 === plugins.length) {
_this.initEl(el, plugins);
}
});
} else if (i === plugins.length) {
// plugin was cached and this plugin was the last
_this.initEl(el, plugins);
}
});
});
}
/**
* Initialise a single container element and add to `this.instances`
*
* @param {HTMLElement} el The container to instantiate wavesurfer to
* @param {PluginDefinition[]} plugins An Array of plugin names to initialise with
* @return {Object} Wavesurfer instance
*/
}, {
key: 'initEl',
value: function initEl(el) {
var _this2 = this;
var plugins = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
var jsonRegex = /^[[|{]/;
// initialise plugins with the correct options
var initialisedPlugins = plugins.map(function (plugin) {
var options = {};
// the regex to find this plugin attributes
var attrNameRegex = new RegExp('^' + plugin);
var attrName = void 0;
// iterate over all the data attributes and find ones for this
// plugin
for (attrName in el.dataset) {
var regexResult = attrNameRegex.exec(attrName);
if (regexResult) {
var attr = el.dataset[attrName];
// if the string begins with a [ or a { parse it as JSON
var prop = jsonRegex.test(attr) ? JSON.parse(attr) : attr;
// this removes the plugin prefix and changes the first letter
// of the resulting string to lower case to follow the naming
// convention of ws params
var unprefixedOptionName = attrName.slice(plugin.length, plugin.length + 1).toLowerCase() + attrName.slice(plugin.length + 1);
options[unprefixedOptionName] = prop;
}
}
return _this2.pluginCache[plugin].create(options);
});
// build parameter object for this container
var params = this.WaveSurfer.util.extend({ container: el }, this.params.defaults, el.dataset, { plugins: initialisedPlugins });
// @TODO make nicer
el.style.display = 'block';
// initialise wavesurfer, load audio (with peaks if provided)
var instance = this.WaveSurfer.create(params);
var peaks = params.peaks ? JSON.parse(params.peaks) : undefined;
instance.load(params.url, peaks);
// push this instance into the instances cache
this.instances.push(instance);
return instance;
}
}]);
return Init;
}();
// if window object exists and window.WS_StopAutoInit is not true
if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && !window.WS_StopAutoInit) {
// call init when document is ready, apply any custom default settings
// in window.WS_InitOptions
if (document.readyState === 'complete') {
window.WaveSurferInit = new Init(window.WaveSurfer, window.WS_InitOptions);
} else {
window.addEventListener('load', function () {
window.WaveSurferInit = new Init(window.WaveSurfer, window.WS_InitOptions);
});
}
}
// export init for manual usage
exports.default = Init;
module.exports = exports['default'];
/***/ }),
/* 1 */
/***/ (function(module, exports) {
module.exports = function load (src, opts, cb) {
var head = document.head || document.getElementsByTagName('head')[0]
var script = document.createElement('script')
if (typeof opts === 'function') {
cb = opts
opts = {}
}
opts = opts || {}
cb = cb || function() {}
script.type = opts.type || 'text/javascript'
script.charset = opts.charset || 'utf8';
script.async = 'async' in opts ? !!opts.async : true
script.src = src
if (opts.attrs) {
setAttributes(script, opts.attrs)
}
if (opts.text) {
script.text = '' + opts.text
}
var onend = 'onload' in script ? stdOnEnd : ieOnEnd
onend(script, cb)
// some good legacy browsers (firefox) fail the 'in' detection above
// so as a fallback we always set onload
// old IE will ignore this and new IE will set onload
if (!script.onload) {
stdOnEnd(script, cb);
}
head.appendChild(script)
}
function setAttributes(script, attrs) {
for (var attr in attrs) {
script.setAttribute(attr, attrs[attr]);
}
}
function stdOnEnd (script, cb) {
script.onload = function () {
this.onerror = this.onload = null
cb(null, script)
}
script.onerror = function () {
// this.onload = null here is necessary
// because even IE9 works not like others
this.onerror = this.onload = null
cb(new Error('Failed to load ' + this.src), script)
}
}
function ieOnEnd (script, cb) {
script.onreadystatechange = function () {
if (this.readyState != 'complete' && this.readyState != 'loaded') return
this.onreadystatechange = null
cb(null, script) // there is no way to catch loading errors in IE8
}
}
/***/ })
/******/ ]);
});
//# sourceMappingURL=wavesurfer-html-init.js.map