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utils.js
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171 lines (158 loc) · 3.92 KB
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/**
* Codex Editor Util
*/
export default class Util {
/**
* Custom logger
*
* @param {string} msg - message
* @param {string} type - logging type 'log'|'warn'|'error'|'info'
* @param {*} args - argument to log with a message
*/
static log(msg, type, args) {
type = type || 'log';
if (!args) {
args = msg || 'undefined';
msg = '[codex-editor]: %o';
} else {
msg = '[codex-editor]: ' + msg;
}
try{
if ( 'console' in window && window.console[ type ] ) {
if ( args ) window.console[ type ]( msg, args );
else window.console[ type ]( msg );
}
} catch(e) {
// do nothing
}
}
/**
* Returns basic keycodes as constants
* @return {{}}
*/
static get keyCodes() {
return {
BACKSPACE: 8,
TAB: 9,
ENTER: 13,
SHIFT: 16,
CTRL: 17,
ALT: 18,
ESC: 27,
SPACE: 32,
LEFT: 37,
UP: 38,
DOWN: 40,
RIGHT: 39,
DELETE: 46,
META: 91
};
}
/**
* @typedef {Object} ChainData
* @property {Object} data - data that will be passed to the success or fallback
* @property {Function} function - function's that must be called asynchronically
*/
/**
* Fires a promise sequence asyncronically
*
* @param {Object[]} chains - list or ChainData's
* @param {Function} success - success callback
* @param {Function} fallback - callback that fires in case of errors
*
* @return {Promise}
*/
static sequence(chains, success = () => {}, fallback = () => {}) {
return new Promise(function (resolve) {
/**
* pluck each element from queue
* First, send resolved Promise as previous value
* Each plugins "prepare" method returns a Promise, that's why
* reduce current element will not be able to continue while can't get
* a resolved Promise
*/
chains.reduce(function (previousValue, currentValue, iteration) {
return previousValue
.then(() => waitNextBlock(currentValue, success, fallback))
.then(() => {
// finished
if (iteration === chains.length - 1) {
resolve();
}
});
}, Promise.resolve());
});
/**
* Decorator
*
* @param {ChainData} chainData
*
* @param {Function} successCallback
* @param {Function} fallbackCallback
*
* @return {Promise}
*/
function waitNextBlock(chainData, successCallback, fallbackCallback) {
return new Promise(function (resolve) {
chainData.function()
.then(() => {
successCallback(chainData.data || {});
})
.then(resolve)
.catch(function () {
fallbackCallback(chainData.data || {});
// anyway, go ahead even it falls
resolve();
});
});
}
}
/**
* Make array from array-like collection
*
* @param {*} collection
*
* @return {Array}
*/
static array(collection) {
return Array.prototype.slice.call(collection);
}
/**
* Checks if object is empty
*
* @param {Object} object
* @return {boolean}
*/
static isEmpty(object) {
return Object.keys(object).length === 0 && object.constructor === Object;
}
/**
* Check if passed object is a Promise
* @param {*} object - object to check
* @return {Boolean}
*/
static isPromise(object) {
return Promise.resolve(object) === object;
}
/**
* Check if passed element is contenteditable
* @param element
* @return {boolean}
*/
static isContentEditable(element) {
return element.contentEditable === 'true';
}
/**
* Delays method execution
*
* @param method
* @param timeout
*/
static delay(method, timeout) {
return function () {
let context = this,
args = arguments;
window.setTimeout(() => method.apply(context, args), timeout);
};
}
};