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webvirtcloud/static/drf-yasg/insQ.js
2022-08-24 15:14:14 +03:00

163 lines
5.3 KiB
JavaScript

var insertionQ = (function () {
"use strict";
var sequence = 100,
isAnimationSupported = false,
animation_string = 'animationName',
keyframeprefix = '',
domPrefixes = 'Webkit Moz O ms Khtml'.split(' '),
pfx = '',
elm = document.createElement('div'),
options = {
strictlyNew: true,
timeout: 20
};
if (elm.style.animationName) {
isAnimationSupported = true;
}
if (isAnimationSupported === false) {
for (var i = 0; i < domPrefixes.length; i++) {
if (elm.style[domPrefixes[i] + 'AnimationName'] !== undefined) {
pfx = domPrefixes[i];
animation_string = pfx + 'AnimationName';
keyframeprefix = '-' + pfx.toLowerCase() + '-';
isAnimationSupported = true;
break;
}
}
}
function listen(selector, callback) {
var styleAnimation, animationName = 'insQ_' + (sequence++);
var eventHandler = function (event) {
if (event.animationName === animationName || event[animation_string] === animationName) {
if (!isTagged(event.target)) {
callback(event.target);
}
}
};
styleAnimation = document.createElement('style');
styleAnimation.innerHTML = '@' + keyframeprefix + 'keyframes ' + animationName + ' { from { outline: 1px solid transparent } to { outline: 0px solid transparent } }' +
"\n" + selector + ' { animation-duration: 0.001s; animation-name: ' + animationName + '; ' +
keyframeprefix + 'animation-duration: 0.001s; ' + keyframeprefix + 'animation-name: ' + animationName + '; ' +
' } ';
document.head.appendChild(styleAnimation);
var bindAnimationLater = setTimeout(function () {
document.addEventListener('animationstart', eventHandler, false);
document.addEventListener('MSAnimationStart', eventHandler, false);
document.addEventListener('webkitAnimationStart', eventHandler, false);
//event support is not consistent with DOM prefixes
}, options.timeout); //starts listening later to skip elements found on startup. this might need tweaking
return {
destroy: function () {
clearTimeout(bindAnimationLater);
if (styleAnimation) {
document.head.removeChild(styleAnimation);
styleAnimation = null;
}
document.removeEventListener('animationstart', eventHandler);
document.removeEventListener('MSAnimationStart', eventHandler);
document.removeEventListener('webkitAnimationStart', eventHandler);
}
};
}
function tag(el) {
el.QinsQ = true; //bug in V8 causes memory leaks when weird characters are used as field names. I don't want to risk leaking DOM trees so the key is not '-+-' anymore
}
function isTagged(el) {
return (options.strictlyNew && (el.QinsQ === true));
}
function topmostUntaggedParent(el) {
if (isTagged(el.parentNode)) {
return el;
} else {
return topmostUntaggedParent(el.parentNode);
}
}
function tagAll(e) {
tag(e);
e = e.firstChild;
for (; e; e = e.nextSibling) {
if (e !== undefined && e.nodeType === 1) {
tagAll(e);
}
}
}
//aggregates multiple insertion events into a common parent
function catchInsertions(selector, callback) {
var insertions = [];
//throttle summary
var sumUp = (function () {
var to;
return function () {
clearTimeout(to);
to = setTimeout(function () {
insertions.forEach(tagAll);
callback(insertions);
insertions = [];
}, 10);
};
})();
return listen(selector, function (el) {
if (isTagged(el)) {
return;
}
tag(el);
var myparent = topmostUntaggedParent(el);
if (insertions.indexOf(myparent) < 0) {
insertions.push(myparent);
}
sumUp();
});
}
//insQ function
var exports = function (selector) {
if (isAnimationSupported && selector.match(/[^{}]/)) {
if (options.strictlyNew) {
tagAll(document.body); //prevents from catching things on show
}
return {
every: function (callback) {
return listen(selector, callback);
},
summary: function (callback) {
return catchInsertions(selector, callback);
}
};
} else {
return false;
}
};
//allows overriding defaults
exports.config = function (opt) {
for (var o in opt) {
if (opt.hasOwnProperty(o)) {
options[o] = opt[o];
}
}
};
return exports;
})();
if (typeof module !== 'undefined' && typeof module.exports !== 'undefined') {
module.exports = insertionQ;
}