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https://github.com/ionic-team/ionic-framework.git
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chore(build): rename ionic directory to src and update all references in the build process.
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Josh Thomas
307
src/util/dom.ts
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307
src/util/dom.ts
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// RequestAnimationFrame Polyfill (Android 4.3 and below)
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/*! @author Paul Irish */
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/*! @source https://gist.github.com/paulirish/1579671 */
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(function() {
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var rafLastTime = 0;
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const win: any = window;
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if (!win.requestAnimationFrame) {
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win.requestAnimationFrame = function(callback, element) {
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var currTime = Date.now();
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var timeToCall = Math.max(0, 16 - (currTime - rafLastTime));
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var id = window.setTimeout(function() {
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callback(currTime + timeToCall);
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}, timeToCall);
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rafLastTime = currTime + timeToCall;
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return id;
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};
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}
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if (!win.cancelAnimationFrame) {
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win.cancelAnimationFrame = function(id) { clearTimeout(id); };
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}
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})();
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// use native raf rather than the zone wrapped one
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let originalRaf = (window[window['Zone']['__symbol__']('requestAnimationFrame')] || window[window['Zone']['__symbol__']('webkitRequestAnimationFrame')]);
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// if the originalRaf from the Zone symbol is not available, we need to provide the polyfilled version
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export const nativeRaf = originalRaf !== undefined ? originalRaf['bind'](window) : window.requestAnimationFrame.bind(window);
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// zone wrapped raf
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export const raf = window.requestAnimationFrame.bind(window);
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export const cancelRaf = window.cancelAnimationFrame.bind(window);
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export const nativeTimeout = window[window['Zone']['__symbol__']('setTimeout')]['bind'](window);
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export const clearNativeTimeout = window[window['Zone']['__symbol__']('clearTimeout')]['bind'](window);
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export function rafFrames(framesToWait, callback) {
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framesToWait = Math.ceil(framesToWait);
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if (framesToWait < 2) {
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nativeRaf(callback);
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} else {
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nativeTimeout(() => {
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nativeRaf(callback);
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}, (framesToWait - 1) * 16.6667);
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}
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}
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export let CSS: {
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transform?: string,
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transition?: string,
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transitionDuration?: string,
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transitionDelay?: string,
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transitionTimingFn?: string,
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transitionStart?: string,
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transitionEnd?: string,
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} = {};
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(function() {
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// transform
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var i, keys = ['webkitTransform', 'transform', '-webkit-transform', 'webkit-transform',
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'-moz-transform', 'moz-transform', 'MozTransform', 'mozTransform', 'msTransform'];
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for (i = 0; i < keys.length; i++) {
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if (document.documentElement.style[keys[i]] !== undefined) {
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CSS.transform = keys[i];
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break;
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}
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}
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// transition
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keys = ['webkitTransition', 'mozTransition', 'msTransition', 'transition'];
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for (i = 0; i < keys.length; i++) {
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if (document.documentElement.style[keys[i]] !== undefined) {
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CSS.transition = keys[i];
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break;
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}
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}
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// The only prefix we care about is webkit for transitions.
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var isWebkit = CSS.transition.indexOf('webkit') > -1;
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// transition duration
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CSS.transitionDuration = (isWebkit ? '-webkit-' : '') + 'transition-duration';
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// transition timing function
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CSS.transitionTimingFn = (isWebkit ? '-webkit-' : '') + 'transition-timing-function';
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// transition delay
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CSS.transitionDelay = (isWebkit ? '-webkit-' : '') + 'transition-delay';
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// To be sure transitionend works everywhere, include *both* the webkit and non-webkit events
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CSS.transitionEnd = (isWebkit ? 'webkitTransitionEnd ' : '') + 'transitionend';
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})();
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export function transitionEnd(el: HTMLElement, callback: Function) {
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if (el) {
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CSS.transitionEnd.split(' ').forEach(eventName => {
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el.addEventListener(eventName, onEvent);
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});
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return unregister;
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}
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function unregister() {
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CSS.transitionEnd.split(' ').forEach(eventName => {
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el.removeEventListener(eventName, onEvent);
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});
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}
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function onEvent(ev) {
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if (el === ev.target) {
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unregister();
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callback(ev);
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}
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}
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}
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export function ready(callback?: Function) {
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let promise = null;
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if (!callback) {
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// a callback wasn't provided, so let's return a promise instead
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promise = new Promise(resolve => { callback = resolve; });
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}
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if (document.readyState === 'complete' || document.readyState === 'interactive') {
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callback();
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} else {
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document.addEventListener('DOMContentLoaded', completed, false);
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window.addEventListener('load', completed, false);
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}
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return promise;
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function completed() {
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document.removeEventListener('DOMContentLoaded', completed, false);
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window.removeEventListener('load', completed, false);
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callback();
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}
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}
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export function windowLoad(callback?: Function) {
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let promise = null;
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if (!callback) {
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// a callback wasn't provided, so let's return a promise instead
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promise = new Promise(resolve => { callback = resolve; });
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}
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if (document.readyState === 'complete') {
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callback();
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} else {
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window.addEventListener('load', completed, false);
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}
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return promise;
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function completed() {
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window.removeEventListener('load', completed, false);
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callback();
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}
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}
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export function pointerCoord(ev: any): {x: number, y: number} {
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// get coordinates for either a mouse click
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// or a touch depending on the given event
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let c = { x: 0, y: 0 };
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if (ev) {
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const touches = ev.touches && ev.touches.length ? ev.touches : [ev];
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const e = (ev.changedTouches && ev.changedTouches[0]) || touches[0];
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if (e) {
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c.x = e.clientX || e.pageX || 0;
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c.y = e.clientY || e.pageY || 0;
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}
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}
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return c;
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}
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export function hasPointerMoved(threshold, startCoord, endCoord) {
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return startCoord && endCoord &&
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(Math.abs(startCoord.x - endCoord.x) > threshold || Math.abs(startCoord.y - endCoord.y) > threshold);
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}
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export function isActive(ele) {
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return !!(ele && (document.activeElement === ele));
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}
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export function hasFocus(ele) {
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return isActive(ele) && (ele.parentElement.querySelector(':focus') === ele);
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}
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export function isTextInput(ele) {
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return !!ele &&
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(ele.tagName === 'TEXTAREA' ||
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ele.contentEditable === 'true' ||
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(ele.tagName === 'INPUT' && !(/^(radio|checkbox|range|file|submit|reset|color|image|button)$/i).test(ele.type)));
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}
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export function hasFocusedTextInput() {
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let ele = document.activeElement;
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if (isTextInput(ele)) {
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return (ele.parentElement.querySelector(':focus') === ele);
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}
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return false;
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}
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const skipInputAttrsReg = /^(value|checked|disabled|type|class|style|id|autofocus|autocomplete|autocorrect)$/i;
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export function copyInputAttributes(srcElement, destElement) {
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// copy attributes from one element to another
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// however, skip over a few of them as they're already
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// handled in the angular world
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var attrs = srcElement.attributes;
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for (var i = 0; i < attrs.length; i++) {
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var attr = attrs[i];
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if (!skipInputAttrsReg.test(attr.name)) {
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destElement.setAttribute(attr.name, attr.value);
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}
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}
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}
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let matchesFn: string;
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let matchesMethods: Array<string> = ['matches', 'webkitMatchesSelector', 'mozMatchesSelector', 'msMatchesSelector'];
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matchesMethods.some((fn: string) => {
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if (typeof document.documentElement[fn] === 'function') {
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matchesFn = fn;
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return true;
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}
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});
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export function closest(ele: HTMLElement, selector: string, checkSelf?: boolean) {
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if (ele && matchesFn) {
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// traverse parents
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ele = (checkSelf ? ele : ele.parentElement);
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while (ele !== null) {
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if (ele[matchesFn](selector)) {
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return ele;
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}
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ele = ele.parentElement;
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}
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}
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return null;
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}
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/**
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* Get the element offsetWidth and offsetHeight. Values are cached
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* to reduce DOM reads. Cache is cleared on a window resize.
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*/
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export function getDimensions(ele: HTMLElement, id: string): {
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width: number, height: number, left: number, top: number
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} {
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let dimensions = dimensionCache[id];
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if (!dimensions) {
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// make sure we got good values before caching
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if (ele.offsetWidth && ele.offsetHeight) {
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dimensions = dimensionCache[id] = {
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width: ele.offsetWidth,
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height: ele.offsetHeight,
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left: ele.offsetLeft,
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top: ele.offsetTop
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};
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} else {
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// do not cache bad values
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return { width: 0, height: 0, left: 0, top: 0 };
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}
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}
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return dimensions;
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}
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export function clearDimensions(id: string) {
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delete dimensionCache[id];
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}
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export function windowDimensions(): {width: number, height: number} {
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if (!dimensionCache.win) {
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// make sure we got good values before caching
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if (window.innerWidth && window.innerHeight) {
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dimensionCache.win = {
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width: window.innerWidth,
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height: window.innerHeight
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};
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} else {
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// do not cache bad values
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return { width: 0, height: 0 };
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}
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}
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return dimensionCache.win;
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}
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export function flushDimensionCache() {
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dimensionCache = {};
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}
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let dimensionCache: any = {};
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