ionic-framework
Version:
201 lines • 6.12 kB
JavaScript
// Simple noop function
function noop() { }
exports.noop = noop;
;
/**
* Given a min and max, restrict the given number
* to the range.
* @param min the minimum
* @param n the value
* @param max the maximum
*/
function clamp(min, n, max) {
return Math.max(min, Math.min(n, max));
}
exports.clamp = clamp;
/**
* Extend the destination with an arbitrary number of other objects.
* @param dst the destination
* @param ... the param objects
*/
function extend(dst) {
return _baseExtend(dst, [].slice.call(arguments, 1), false);
}
exports.extend = extend;
/**
* Do a deep extend (merge).
* @param dst the destination
* @param ... the param objects
*/
function merge(dst) {
return _baseExtend(dst, [].slice.call(arguments, 1), true);
}
exports.merge = merge;
function _baseExtend(dst, objs, deep) {
for (var i = 0, ii = objs.length; i < ii; ++i) {
var obj = objs[i];
if (!obj || !exports.isObject(obj) && !exports.isFunction(obj))
continue;
var keys = Object.keys(obj);
for (var j = 0, jj = keys.length; j < jj; j++) {
var key = keys[j];
var src = obj[key];
if (deep && exports.isObject(src)) {
if (!exports.isObject(dst[key]))
dst[key] = exports.isArray(src) ? [] : {};
_baseExtend(dst[key], [src], true);
}
else {
dst[key] = src;
}
}
}
return dst;
}
function debounce(func, wait, immediate) {
var timeout, args, context, timestamp, result;
return function () {
context = this;
args = arguments;
timestamp = new Date();
var later = function () {
var last = (new Date()) - timestamp;
if (last < wait) {
timeout = setTimeout(later, wait - last);
}
else {
timeout = null;
if (!immediate)
result = func.apply(context, args);
}
};
var callNow = immediate && !timeout;
if (!timeout) {
timeout = setTimeout(later, wait);
}
if (callNow)
result = func.apply(context, args);
return result;
};
}
exports.debounce = debounce;
/**
* Apply default arguments if they don't exist in
* the first object.
* @param the destination to apply defaults to.
*/
function defaults(dest) {
for (var i = arguments.length - 1; i >= 1; i--) {
var source = arguments[i] || {};
for (var key in source) {
if (source.hasOwnProperty(key) && !dest.hasOwnProperty(key)) {
dest[key] = source[key];
}
}
}
return dest;
}
exports.defaults = defaults;
exports.isBoolean = function (val) { return typeof val === 'boolean'; };
exports.isString = function (val) { return typeof val === 'string'; };
exports.isNumber = function (val) { return typeof val === 'number'; };
exports.isFunction = function (val) { return typeof val === 'function'; };
exports.isDefined = function (val) { return typeof val !== 'undefined'; };
exports.isUndefined = function (val) { return typeof val === 'undefined'; };
exports.isBlank = function (val) { return val === undefined || val === null; };
exports.isObject = function (val) { return typeof val === 'object'; };
exports.isArray = Array.isArray;
exports.isTrueProperty = function (val) { return typeof val !== 'undefined' && val !== "false"; };
/**
* Convert a string in the format thisIsAString to a slug format this-is-a-string
*/
function pascalCaseToDashCase(str) {
if (str === void 0) { str = ''; }
return str.charAt(0).toLowerCase() + str.substring(1).replace(/[A-Z]/g, function (match) {
return '-' + match.toLowerCase();
});
}
exports.pascalCaseToDashCase = pascalCaseToDashCase;
var uid = 0;
function nextUid() {
return ++uid;
}
exports.nextUid = nextUid;
exports.array = {
find: function (arr, cb) {
for (var i = 0, ii = arr.length; i < ii; i++) {
if (cb(arr[i], i))
return arr[i];
}
},
remove: function (arr, itemOrIndex) {
var index = -1;
if (exports.isNumber(itemOrIndex)) {
index = itemOrIndex;
}
else {
index = arr.indexOf(itemOrIndex);
}
if (index < 0) {
return false;
}
arr.splice(index, 1);
return true;
}
};
/**
* Grab the query string param value for the given key.
* @param key the key to look for
*/
function getQuerystring(url, key) {
var queryParams = {};
if (url) {
var startIndex = url.indexOf('?');
if (startIndex !== -1) {
var queries = url.slice(startIndex + 1).split('&');
queries.forEach(function (param) {
var split = param.split('=');
queryParams[split[0].toLowerCase()] = split[1].split('#')[0];
});
}
if (key) {
return queryParams[key] || '';
}
}
return queryParams;
}
exports.getQuerystring = getQuerystring;
/**
* Throttle the given fun, only allowing it to be
* called at most every `wait` ms.
*/
function throttle(func, wait, options) {
var context, args, result;
var timeout = null;
var previous = 0;
options || (options = {});
var later = function () {
previous = options.leading === false ? 0 : Date.now();
timeout = null;
result = func.apply(context, args);
};
return function () {
var now = Date.now();
if (!previous && options.leading === false)
previous = now;
var remaining = wait - (now - previous);
context = this;
args = arguments;
if (remaining <= 0) {
clearTimeout(timeout);
timeout = null;
previous = now;
result = func.apply(context, args);
}
else if (!timeout && options.trailing !== false) {
timeout = setTimeout(later, remaining);
}
return result;
};
}
exports.throttle = throttle;