140 lines
2.6 KiB
JavaScript
140 lines
2.6 KiB
JavaScript
/*jslint browser:true */
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/*global $*/
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$(function() {
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var ACTION_FILL = 1,
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ACTION_ERASE = 2;
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var defaultOptions = {
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strings: [
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"Hello!",
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"How are you?"
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],
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waitFillDuration: 200,
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waitEraseDuration: 2000,
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animateDuration: 400,
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easing: 'swing'
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};
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function FluidType ($userElem, userOptions) {
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var _$other,
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_$elem = $userElem,
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_pauseRequested = false,
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_currentAction = ACTION_ERASE,
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_currentString = 0,
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_options = $.extend({}, defaultOptions, userOptions),
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_self = this;
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this.animateFill = function() {
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var str = _options.strings[_currentString];
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_$elem.html(str);
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_$elem.parent().find(_$other).remove();
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_$other = _$elem.clone();
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_$other.css({
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width: '',
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position: 'absolute',
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visibility: 'hidden',
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display: 'block',
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left: '-300%',
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});
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_$elem.parent().append(_$other);
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_$elem.velocity(
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{
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width: _$other.width()
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},
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{
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duration: _options.animateDuration,
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easing: _options.easing,
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complete: _self.next
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}
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);
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};
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/*
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* Erase
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*/
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this.animateErase = function() {
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_$elem.velocity(
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{
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width: 0 //'= ' + _$other.width()
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},
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{
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duration: _options.animateDuration,
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easing: _options.easing,
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complete: _self.next
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}
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);
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};
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/*
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* Switch to the next action.
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* Pause request does not affect Erase => Fill switch
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*/
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this.next = function() {
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_currentString = (_currentString + 1) % _options.strings.length;
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switch (_currentAction) {
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case ACTION_ERASE:
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_currentAction = ACTION_FILL;
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setTimeout(
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_self.animateFill.bind(_self),
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_options.waitFillDuration
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);
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break;
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case ACTION_FILL:
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if (!_pauseRequested) {
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_currentAction = ACTION_ERASE;
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setTimeout(
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_self.animateErase.bind(_self),
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_options.waitEraseDuration
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);
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}
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break;
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}
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};
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/*
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* Start animation (again)
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*/
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this.start = function() {
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// choose next string
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_pauseRequested = false;
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_self.next();
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};
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/*
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* Request animation stop
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*/
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this.stop = function() {
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_pauseRequested = true;
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};
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/*
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* Set up element properties
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*/
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function initialize() {
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_$elem.css({
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boxSizing: 'border-box',
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display: 'inline-block',
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overflow: 'hidden',
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whiteSpace: 'nowrap',
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verticalAlign: 'bottom',
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width: 0
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});
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_self.start();
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}
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initialize();
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}
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$.fn.fluidType = function(userOptions) {
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var $target = $(this);
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var fluidType = new FluidType($target, userOptions);
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return fluidType;
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};
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});
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