259 lines
7.5 KiB
JavaScript
259 lines
7.5 KiB
JavaScript
(function($){
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var jmpressOpts = {
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fullscreen : false,
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hash : { use : false },
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mouse : { clickSelects : false },
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keyboard : { use : true },
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animation : { transitionDuration : '1s' },
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presentationMode : false,
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stepSelector : '.step',
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duration : {
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defaultValue: 0
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}
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};
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/**
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* Presentation constructor
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*/
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function Presentation (wrapper) {
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var _self, duration, new_css, ie_regex, matches;
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_self = this;
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_self.wrapper = $(wrapper); // The wrapper for toggling fullscreen
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_self.slideshow = $('.presentation', wrapper); // Holds the slides for jmpress
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_self.navLeft = $('.nav-arrow-left', wrapper);
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_self.navRight = $('.nav-arrow-right', wrapper);
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_self.expandButton = $('.nav-fullscreen-button', wrapper);
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_self.overlay = $('.autoplay-overlay', wrapper);
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_self.fullscreen = false;
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_self.autoPlaying = false;
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_self.autoplayTime = parseFloat(_self.slideshow.attr('data-autoplay'), 10) || 0;
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// The wrapper is scaled to the contents' size so that its border wraps tightly
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_self.wrapper.css({
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width: _self.slideshow.width(),
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height: _self.slideshow.height()
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});
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duration = _self.slideshow.attr('duration') || '1s';
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jmpressOpts.animation.transitionDuration = duration;
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// Compensate for transition times
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if( _self.autoplayTime ) {
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_self.autoplayTime += parseFloat(duration, 10) * 1000;
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}
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// Set the opacity transition duration
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// as it is delegated by css and not jmpress
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duration = 'opacity ' + duration;
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new_css = {
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'width' : _self.slideshow.width(),
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'height' : _self.slideshow.height(),
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'-webkit-transition': duration,
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'-moz-transition' : duration,
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'-ms-transition' : duration,
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'-o-transition' : duration,
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'transition' : duration
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};
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$('.step', _self.slideshow).each(function(i, step) {
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$(step).css(new_css);
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});
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// Apply attribute to allow fading individual bullets here,
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// otherwise wp_kses will strip the attribute out
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$('.step.fadebullets li', _self.slideshow).each(function(i, step) {
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$(step).attr('data-jmpress', 'fade');
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});
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// Register resizing to window when fullscreen
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$(window).resize(function() {
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if ( _self.fullscreen ) {
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_self.resizePresentation();
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}
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});
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// Register the nav bars to move the slides
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_self.navLeft.on('click', function(){
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_self.slideshow.jmpress('prev');
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_self.overlay.css('opacity', 0);
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return false;
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});
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_self.navRight.on('click', function(){
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_self.slideshow.jmpress('next');
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_self.overlay.css('opacity', 0);
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return false;
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});
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_self.slideshow.on('click', function() {
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_self.setAutoplay(true);
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return false;
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});
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_self.slideshow.on('focusout', function() {
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_self.setAutoplay(false);
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});
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// Register toggling fullscreen except for IE 9 or lower
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ie_regex = /MSIE\s(\d+)\.\d+/;
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matches = ie_regex.exec(navigator.userAgent);
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if ( matches && parseInt(matches[1], 10) < 10 ) {
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_self.expandButton.remove();
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_self.expandButton = null;
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} else {
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_self.expandButton.on('click', function() {
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_self.setFullscreen( !_self.fullscreen );
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return false;
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});
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}
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// Register ESC key to exit fullscreen
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$(window).on('keydown', function( event ) {
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if ( event.which === 27 ) {
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_self.setFullscreen( false );
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}
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});
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// Start the presentation
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_self.slideshow.jmpress(jmpressOpts);
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// Make content visible and remove error message on jmpress success
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if ( _self.slideshow.jmpress('initialized') ) {
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_self.slideshow.css('display', '');
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_self.overlay.css('display', '');
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$('.not-supported-msg', _self.wrapper).remove();
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}
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// A bug in Firefox causes issues with the nav arrows appearing
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// on hover in presentation mode. Explicitly disabling fullscreen
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// on init seems to fix the issue
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_self.setFullscreen( false );
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}
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$.extend( Presentation.prototype, {
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resizePresentation: function () {
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var scale, duration, settings, new_css, widthScale, heightScale;
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// Set the animation duration to 0 during resizing
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// so that there isn't an animation delay when scaling
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// up the slide contents
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settings = this.slideshow.jmpress('settings');
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duration = settings.animation.transitionDuration;
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settings.animation.transitionDuration = '0s';
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this.slideshow.jmpress('reselect');
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scale = 1;
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new_css = {
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top : 0,
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left : 0,
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zoom : 1
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};
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// Expand the presentation to fill the lesser of the max width or height
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// This avoids content moving past the window for certain window sizes
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if ( this.fullscreen ) {
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widthScale = $(window).width() / this.slideshow.width();
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heightScale = $(window).height() / this.slideshow.height();
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scale = Math.min(widthScale, heightScale);
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new_css.top = ( $(window).height() - (scale * this.slideshow.height()) ) / 2;
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new_css.left = ( $(window).width() - (scale * this.slideshow.width() ) ) / 2;
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}
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// Firefox does not support the zoom property; IE does, but it does not work
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// well like in webkit, so we manually transform and position the slideshow
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if ( this.slideshow.css('-moz-transform') || this.slideshow.css('-ms-transform') ) {
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// Firefox keeps the center of the element in place and expands outward
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// so we must shift everything to compensate
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new_css.top += (scale - 1) * this.slideshow.height() / 2;
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new_css.left += (scale - 1) * this.slideshow.width() / 2;
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scale = 'scale(' + scale + ')';
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$.extend(new_css, {
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'-moz-transform' : scale,
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'-ms-transform' : scale,
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'transform' : scale
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});
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} else {
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// webkit scales everything with zoom so we need to offset the right amount
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// so that the content is vertically centered after scaling effects
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new_css.top /= scale;
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new_css.left /= scale;
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new_css.zoom = scale;
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}
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this.slideshow.css(new_css);
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settings.animation.transitionDuration = duration;
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this.slideshow.jmpress('reselect');
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},
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setFullscreen: function ( on ) {
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this.fullscreen = on;
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this.setAutoplay(false);
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// Save the scroll positions before going into fullscreen mode
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if ( on ) {
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this.scrollVert = $(window).scrollTop();
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this.scrollHoriz = $(window).scrollLeft();
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// Chrome Bug: Force scroll to be at top
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// otherwise the presentation can end up offscreen
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$(window).scrollTop(0);
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$(window).scrollLeft(0);
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}
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$('html').toggleClass('presentation-global-fullscreen', on);
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$('body').toggleClass('presentation-global-fullscreen', on);
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this.wrapper.toggleClass('presentation-wrapper-fullscreen', on);
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this.wrapper.parents().each(function(i, e){
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$(e).toggleClass('presentation-wrapper-fullscreen-parent', on);
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});
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this.resizePresentation();
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// Reset the scroll positions after exiting fullscreen mode
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if ( !on ) {
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$(window).scrollTop(this.scrollVert);
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$(window).scrollLeft(this.scrollHoriz);
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}
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},
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setAutoplay: function ( on ) {
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var _self = this, newAutoplayTime;
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if ( _self.autoPlaying === on ) {
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return;
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}
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newAutoplayTime = (on && _self.autoplayTime > 0) ? _self.autoplayTime : 0;
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_self.slideshow.jmpress('settings').duration.defaultValue = newAutoplayTime;
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// Move to the next slide when activating autoplay
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if( newAutoplayTime ) {
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_self.slideshow.jmpress('next');
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_self.overlay.css('opacity', 0);
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} else {
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_self.slideshow.jmpress('reselect');
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}
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_self.autoPlaying = on;
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}
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});
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$( document ).ready( function(){
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$('.presentation-wrapper').map(function() {
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new Presentation(this);
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});
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});
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})(jQuery);
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