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devin.jquery.utils.js
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devin.jquery.utils.js
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(function($) { //be efficient! onScreen helps you select only elements visible on the screen like $('.emi:onScreen').verticallyAnim(8)
// onScreen jQuery plugin v0.2.1
// (c) 2011 Ben Pickles
//
// Checkout: http://benpickles.github.com/onScreen
$.id = function(el) {
return $(document.getElementById(el));
}
//run some css without any transitions occuring, takes a css object, and callback to run after the transition is done
$.fn.noTransition = function(css, callback) {
console.log(css);
var realThis = this;
var prevTrans = realThis.css(pre + 'transition-property');
realThis.css(pre + 'transition-property', 'none');
realThis.css(css);
setTimeout(function(){
realThis.css(pre + 'transition-property', prevTrans);
if (callback) callback();
}, 1);
};
})(jQuery);
(function( $ ){ //verticallyAnim depends on the following code in this closure:
//has string method, returns true/false if a string has a substring
window.String.prototype.has = function(string) {
if (this.indexOf(string) > -1) {
return true;
} else {
return false;
}
};
//css3 vendor prefix 'pre' variable
var ua = navigator.userAgent;
if (ua.has('WebKit') || us.has('webkit') || ua.has('Webkit')) {
window.pre = '-webkit-';
} else {
alert('verticallyAnim has been lazy and opted not to configure for non-webkit browsers. This is a fairly easy fix if you are seeing this message. Just set the \'pre\' variable based on this userAgent: ' + ua + '\n\nTHEN AGAIN this is made specifically for iOS GPU animations..');
vaExit(this);
}
//transition single PROPerty to some VALue
$.fn.ensureTransition = function(prop, val) {
var realThis = this;
var prevTrans = realThis.css(pre + 'transition-property');
realThis.css(pre + 'transition-property', prop);
setTimeout(function(){
realThis.css(prop, val);
setTimeout(function(){
realThis.css(pre + 'transition-property', prevTrans);
}, 1);
}, 5);
}
$.fn.verticallyAnim = function(px, doneCallback) {
//vaExit = verticallyAnim Exit (for failure/bad validation)
var vaExit = function(realThis) {
console.error('verticallyAnim\'s first argument for vertical movement was: ');
console.error(px);
console.error('verticallyAnim\'s second argument, the callback for completion was:');
console.error(doneCallback);
console.error('the this reference to a jQuery node verticallyAnim is working on:');
console.error(realThis);
console.error('verticallyAnim exiting..');
return '"verticallyAnim had a problem and exited"';
};
//check if we even have a jQuery object… don't know how necessary this is
if (!this.jquery) {
alert('verticallyAnim ended up with a non-jquery this. See console.');
vaExit(this);
}
//a 0 length means this is being called on a bad selector
if (this.length === 0) {
console.error('verticallyAnim ended up with an empty jQuery array. You must have a bad selector for something.');
vaExit(this);
}
//check the css method as it's very critical
if (!this.css) {
console.error('..bad selector? this.css is false');
vaExit(this);
}
return this.each(function(){ //return jQuery object for proper chaining, do this.each to act on a collection/array
var realThis = $(this); //so there are no mixups around what this is this or that
try {
//some more validation
//normalize px:
if (typeof px === 'number') {
px = px + 'px';
} else {
if (!px.has('px')) {
alert('At this time, the verticallyAnim plugin only supports a numerical pixel movement, ' +
'or literal pixel string, like \'30px\', 30, or -10. View console for more info.');
vaExit(this);
}
}
//assure transition is setup correctly.
var prop = realThis.css(pre + 'transition-property');
var dur = realThis.css(pre + 'transition-duration');
var fn = realThis.css(pre + 'transition-timing-function');
if (realThis.css(pre + 'transition') === '' && dur === '0s' && prop === 'all' && typeof fn === 'undefined') {
realThis.css(pre + 'transition', 'all 0.3s ease-in-out');
} else {
if ( prop.has(pre + 'transform') || prop.has('all') ) {/*do nothing*/}
else {
realThis.css(pre + 'transition-property', prop + ', ' + pre + 'transform');
}
if (dur === '0s') { //'0s' seems to be what gets returned by default
realThis.css(pre + 'transition-duration', '0.3s');
}
if (typeof fn === 'undefined') {
realThis.css(pre + 'transition-timing-function', 'ease-in-out');
}
}
//calculations to trigger the translation
var trans = realThis.css(pre + 'transform'); //jQuery is rather important here, as (I think) it normalizes the css string
if (trans === 'none') { //1. 'none' is default for -webkit-transform. Since nothing is here, jsut write in the translate.
trans = ' translate3d(0px, ' + px + ', 0px)';
} else { //2. else, respect current transform values..
if (trans.has('translate3d(')) { //3. and if a translate3d is in place, merge with it
var startTranslate = trans.indexOf('translate3d(');
var transOpen = startTranslate + 12;
var transClose = trans.indexOf(')', transOpen);
var transMiddle = trans.substring(transOpen, transClose);
var translate = trans.substring(startTranslate, transClose + 1);
var firstComma = transMiddle.indexOf(', ') + 2;
var secondComma = transMiddle.indexOf(',', firstComma);
var transY = transMiddle.substring(firstComma, secondComma);
var ySum = parseInt(transY) + parseInt(px);
trans = trans.replace(translate, translate.replace(', ' + transY + ',', ', ' + ySum + 'px,'));
} else { //4. otherwise, just add a translate3d to current transforms
trans = trans + ' translate3d(0px, ' + px + ', 0px)';
}
}
var executedTranslate = trans; //idk, preserve executedTranslate.
//BAM execute this translation!
realThis.singleTransition(pre + 'transform', executedTranslate);
//doing -webkit-transform: translate3d(8px,58px,10px) rotate(0) scale(1) translate3d(8px,58px,10px) translate3d(0px,58px,10px); is perfectly valid. This simply adds up the x, y, z values. Thank you css!
setTimeout(function(){
var transitionDuration = parseFloat(realThis.css(pre + 'transition-duration')) * 1000;
setTimeout(function(){
if (doneCallback) doneCallback();
console.log('verticallyAnim completed: ' + executedTranslate);
}, transitionDuration);
}, 2);
return '"this is a verticallyAnim return value. If you are trying to use chaining, verticallyAnim does not yet support this. Reference http://docs.jquery.com/Plugins/Authoring on enabling this - HOWEVER, it\'s important to consider the callback functionality.."';
} //close try block.
catch(e) {
console.error('Caught error:');
console.error(e);
}
});
};
})( jQuery );