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js/animate-text.js 5.4 KB
87e21225   Andy   new webportal
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  jQuery(document).ready(function($){
  	//set animation timing
  	var animationDelay = 2500,
  		//loading bar effect
  		barAnimationDelay = 3800,
  		barWaiting = barAnimationDelay - 3000, //3000 is the duration of the transition on the loading bar - set in the scss/css file
  		//letters effect
  		lettersDelay = 50,
  		//type effect
  		typeLettersDelay = 150,
  		selectionDuration = 500,
  		typeAnimationDelay = selectionDuration + 800,
  		//clip effect 
  		revealDuration = 600,
  		revealAnimationDelay = 1500;
  	
  	initHeadline();
  	
  
  	function initHeadline() {
  		//insert <i> element for each letter of a changing word
  		singleLetters($('.cd-headline.letters').find('b'));
  		//initialise headline animation
  		animateHeadline($('.cd-headline'));
  	}
  
  	function singleLetters($words) {
  		$words.each(function(){
  			var word = $(this),
  				letters = word.text().split(''),
  				selected = word.hasClass('is-visible');
  			for (i in letters) {
  				if(word.parents('.rotate-2').length > 0) letters[i] = '<em>' + letters[i] + '</em>';
  				letters[i] = (selected) ? '<i class="in">' + letters[i] + '</i>': '<i>' + letters[i] + '</i>';
  			}
  		    var newLetters = letters.join('');
  		    word.html(newLetters).css('opacity', 1);
  		});
  	}
  
  	function animateHeadline($headlines) {
  		var duration = animationDelay;
  		$headlines.each(function(){
  			var headline = $(this);
  			
  			if(headline.hasClass('loading-bar')) {
  				duration = barAnimationDelay;
  				setTimeout(function(){ headline.find('.cd-words-wrapper').addClass('is-loading') }, barWaiting);
  			} else if (headline.hasClass('clip')){
  				var spanWrapper = headline.find('.cd-words-wrapper'),
  					newWidth = spanWrapper.width() + 10
  				spanWrapper.css('width', newWidth);
  			} else if (!headline.hasClass('type') ) {
  				//assign to .cd-words-wrapper the width of its longest word
  				var words = headline.find('.cd-words-wrapper b'),
  					width = 0;
  				words.each(function(){
  					var wordWidth = $(this).width();
  				    if (wordWidth > width) width = wordWidth;
  				});
  				headline.find('.cd-words-wrapper').css('width', width);
  			};
  
  			//trigger animation
  			setTimeout(function(){ hideWord( headline.find('.is-visible').eq(0) ) }, duration);
  		});
  	}
  
  	function hideWord($word) {
  		var nextWord = takeNext($word);
  		
  		if($word.parents('.cd-headline').hasClass('type')) {
  			var parentSpan = $word.parent('.cd-words-wrapper');
  			parentSpan.addClass('selected').removeClass('waiting');	
  			setTimeout(function(){ 
  				parentSpan.removeClass('selected'); 
  				$word.removeClass('is-visible').addClass('is-hidden').children('i').removeClass('in').addClass('out');
  			}, selectionDuration);
  			setTimeout(function(){ showWord(nextWord, typeLettersDelay) }, typeAnimationDelay);
  		
  		} else if($word.parents('.cd-headline').hasClass('letters')) {
  			var bool = ($word.children('i').length >= nextWord.children('i').length) ? true : false;
  			hideLetter($word.find('i').eq(0), $word, bool, lettersDelay);
  			showLetter(nextWord.find('i').eq(0), nextWord, bool, lettersDelay);
  
  		}  else if($word.parents('.cd-headline').hasClass('clip')) {
  			$word.parents('.cd-words-wrapper').animate({ width : '2px' }, revealDuration, function(){
  				switchWord($word, nextWord);
  				showWord(nextWord);
  			});
  
  		} else if ($word.parents('.cd-headline').hasClass('loading-bar')){
  			$word.parents('.cd-words-wrapper').removeClass('is-loading');
  			switchWord($word, nextWord);
  			setTimeout(function(){ hideWord(nextWord) }, barAnimationDelay);
  			setTimeout(function(){ $word.parents('.cd-words-wrapper').addClass('is-loading') }, barWaiting);
  
  		} else {
  			switchWord($word, nextWord);
  			setTimeout(function(){ hideWord(nextWord) }, animationDelay);
  		}
  	}
  
  	function showWord($word, $duration) {
  		if($word.parents('.cd-headline').hasClass('type')) {
  			showLetter($word.find('i').eq(0), $word, false, $duration);
  			$word.addClass('is-visible').removeClass('is-hidden');
  
  		}  else if($word.parents('.cd-headline').hasClass('clip')) {
  			$word.parents('.cd-words-wrapper').animate({ 'width' : $word.width() + 10 }, revealDuration, function(){ 
  				setTimeout(function(){ hideWord($word) }, revealAnimationDelay); 
  			});
  		}
  	}
  
  	function hideLetter($letter, $word, $bool, $duration) {
  		$letter.removeClass('in').addClass('out');
  		
  		if(!$letter.is(':last-child')) {
  		 	setTimeout(function(){ hideLetter($letter.next(), $word, $bool, $duration); }, $duration);  
  		} else if($bool) { 
  		 	setTimeout(function(){ hideWord(takeNext($word)) }, animationDelay);
  		}
  
  		if($letter.is(':last-child') && $('html').hasClass('no-csstransitions')) {
  			var nextWord = takeNext($word);
  			switchWord($word, nextWord);
  		} 
  	}
  
  	function showLetter($letter, $word, $bool, $duration) {
  		$letter.addClass('in').removeClass('out');
  		
  		if(!$letter.is(':last-child')) { 
  			setTimeout(function(){ showLetter($letter.next(), $word, $bool, $duration); }, $duration); 
  		} else { 
  			if($word.parents('.cd-headline').hasClass('type')) { setTimeout(function(){ $word.parents('.cd-words-wrapper').addClass('waiting'); }, 200);}
  			if(!$bool) { setTimeout(function(){ hideWord($word) }, animationDelay) }
  		}
  	}
  
  	function takeNext($word) {
  		return (!$word.is(':last-child')) ? $word.next() : $word.parent().children().eq(0);
  	}
  
  	function takePrev($word) {
  		return (!$word.is(':first-child')) ? $word.prev() : $word.parent().children().last();
  	}
  
  	function switchWord($oldWord, $newWord) {
  		$oldWord.removeClass('is-visible').addClass('is-hidden');
  		$newWord.removeClass('is-hidden').addClass('is-visible');
  	}
  });