ncase.me-trust/js/core/Slideshow.js

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JavaScript
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2017-06-20 11:10:41 +00:00
function Slideshow(config){
var self = this;
self.config = config;
// DOM
self.dom = config.dom;
// Slide information
self.slides = config.slides;
// Reset: INITIAL VARIABLES
self.reset = function(){
self.dom.innerHTML = "";
self.slideIndex = -1;
self.currentSlide = null;
};
self.reset();
// Go to next slide
self.nextSlide = function(INSTANT){
// Update the information
if(self.slideIndex >= self.slides.length-1) return;
self.slideIndex++;
self.currentSlide = self.slides[self.slideIndex];
// Remove whatever
var remove = self.currentSlide.remove || [];
var promisesToRemove = [];
for(var i=0; i<remove.length; i++){
var promiseToRemove = self.removeObject(remove[i], INSTANT);
if(promiseToRemove) promisesToRemove.push(promiseToRemove);
}
// After removing, add whatever
var addObjects = function(){
var add = self.currentSlide.add || [];
for(var i=0; i<add.length; i++) self.addObject(add[i], INSTANT);
};
if(INSTANT || promisesToRemove.length==0) addObjects();
else Q.all(promisesToRemove).then(addObjects);
// Send out message!
publish("slideshow/slideChange", [self.currentSlide.id]);
};
// Subscribe to "next slide" message...
subscribe("slideshow/next", function(){
self.nextSlide();
});
// FORCE go to a certain slide
self.gotoSlide = function(id){
// Go ALL the way to the past
self.reset();
// And just move all the way forward, what a hack.
// TODO: a more efficient one that looks at id's FIRST.
self.nextSlide(true);
while(self.currentSlide.id != id){
self.nextSlide(true);
}
};
// Subscribe to the "force goto" message...
subscribe("slideshow/goto", function(id){
self.gotoSlide(id);
});
// Objects!
self.objects = {};
// Add Object
self.addObject = function(objectConfig, INSTANT){
// Create object
var Classname = window[objectConfig.type];
var obj = new Classname(objectConfig);
obj.slideshow = self;
// Remember it
self.objects[objectConfig.id] = obj;
// Add it for real!
return obj.add(INSTANT); // return a possible promise
};
// Remove Object
self.removeObject = function(objectConfig, INSTANT){
// Find it...
var obj = self.objects[objectConfig.id];
// Remove from memory & DOM
delete self.objects[objectConfig.id];
return obj.remove(INSTANT); // return a possible promise
};
}