1322 lines
44 KiB
JavaScript
1322 lines
44 KiB
JavaScript
var Attentive,
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__bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
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if (!(typeof Attentive !== "undefined" && Attentive !== null)) Attentive = {};
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Attentive.Presentation = (function() {
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Presentation.setup = function(identifier) {
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var starter;
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starter = function() {
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return setTimeout(function() {
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return (new Attentive.Presentation(identifier)).start();
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}, 250);
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};
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return window.addEventListener('DOMContentLoaded', starter, false);
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};
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function Presentation(identifier) {
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this.identifier = identifier;
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this.align = __bind(this.align, this);
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this.getCurrentSlide = __bind(this.getCurrentSlide, this);
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this.calculate = __bind(this.calculate, this);
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this.advanceTo = __bind(this.advanceTo, this);
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this.advance = __bind(this.advance, this);
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this.handleKeyDown = __bind(this.handleKeyDown, this);
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this.handleMouseUp = __bind(this.handleMouseUp, this);
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this.handleMouseDown = __bind(this.handleMouseDown, this);
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this.handlePopState = __bind(this.handlePopState, this);
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this.length = this.allSlides().length;
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this.priorSlide = null;
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this.initialRender = true;
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this.timer = new Attentive.PresentationTimer();
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this.timer.hide();
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this.currentWindowHeight = null;
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document.querySelector('body').appendChild(this.timer.el);
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}
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Presentation.prototype.bodyClassList = function() {
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return this._bodyClassList || (this._bodyClassList = document.querySelector('body').classList);
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};
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Presentation.prototype.allSlides = function() {
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return this._allSlides || (this._allSlides = Attentive.Slide.fromList(this.slidesViewer().querySelectorAll('.slide')));
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};
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Presentation.prototype.slidesViewer = function() {
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return this._slidesViewer || (this._slidesViewer = document.querySelector(this.identifier));
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};
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Presentation.prototype.start = function() {
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var imageWait,
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_this = this;
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this.timer.render();
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document.addEventListener('keydown', this.handleKeyDown, false);
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document.addEventListener('mousedown', this.handleMouseDown, false);
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document.addEventListener('mouseup', this.handleMouseUp, false);
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window.addEventListener('resize', _.throttle(this.calculate, 500), false);
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imageWait = null;
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imageWait = function() {
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var img, slide, wait, _i, _j, _len, _len2, _ref, _ref2;
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wait = false;
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_ref = _this.allSlides();
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for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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slide = _ref[_i];
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_ref2 = slide.dom.getElementsByTagName('img');
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for (_j = 0, _len2 = _ref2.length; _j < _len2; _j++) {
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img = _ref2[_j];
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if (!img.complete) wait = true;
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}
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}
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if (wait) {
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return setTimeout(imageWait, 100);
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} else {
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return _this.advanceTo(_this.slideFromLocation());
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}
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};
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return imageWait();
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};
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Presentation.prototype.slideFromLocation = function() {
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return Number(location.hash.substr(1));
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};
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Presentation.prototype.handlePopState = function(e) {
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return this.advanceTo(this.slideFromLocation());
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};
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Presentation.prototype.handleMouseDown = function(e) {
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return this.startSwipeX = e.x;
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};
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Presentation.prototype.handleMouseUp = function(e) {
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var distance;
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distance = this.startSwipeX - e.x;
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if (Math.abs(distance) > 10) {
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if (distance < 0) {
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return this.advance(-1);
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} else {
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return this.advance(1);
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}
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} else {
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if (e.target.tagName !== 'A') return this.advance();
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}
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};
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Presentation.prototype.handleKeyDown = function(e) {
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switch (e.keyCode) {
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case 72:
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return this.advanceTo(0);
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case 37:
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case 33:
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return this.advance(-1);
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case 39:
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case 32:
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case 34:
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return this.advance();
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case 220:
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return this.timer.reset();
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case 84:
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if (e.shiftKey) {
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return this.timer.toggleVisible();
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} else {
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if (this.timer.isVisible()) return this.timer.toggle();
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}
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}
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};
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Presentation.prototype.advance = function(offset) {
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if (offset == null) offset = 1;
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return this.advanceTo(Math.max(Math.min(this.currentSlide + offset, this.length - 1), 0));
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};
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Presentation.prototype.advanceTo = function(index) {
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this.priorSlide = this.currentSlide;
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this.currentSlide = index || 0;
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this.calculate();
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return location.hash = this.currentSlide;
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};
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Presentation.prototype.calculate = function() {
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var recalculate, slide, times, _i, _len, _ref;
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if (this.currentWindowHeight !== window.innerHeight) {
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recalculate = true;
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times = 3;
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while (recalculate && times > 0) {
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recalculate = false;
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times -= 1;
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_ref = this.allSlides();
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for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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slide = _ref[_i];
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if (slide.recalculate()) recalculate = true;
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}
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}
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this.currentWindowHeight = window.innerHeight;
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this.slidesViewer().style['width'] = "" + (window.innerWidth * this.allSlides().length) + "px";
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}
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return this.align();
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};
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Presentation.prototype.getCurrentSlide = function() {
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return this.allSlides()[this.currentSlide];
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};
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Presentation.prototype.align = function() {
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if (this.priorSlide) this.allSlides()[this.priorSlide].deactivate();
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this.getCurrentSlide().activate();
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this.slidesViewer().style['left'] = "-" + (this.currentSlide * window.innerWidth) + "px";
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if (this.initialRender) {
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this.bodyClassList().remove('loading');
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this.initialRender = false;
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this.currentWindowHeight = null;
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return this.calculate();
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}
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};
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return Presentation;
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})();
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var Attentive,
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__bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
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if (!(typeof Attentive !== "undefined" && Attentive !== null)) Attentive = {};
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Attentive.Slide = (function() {
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Slide.fromList = function(list) {
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var result, slide;
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return result = (function() {
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var _i, _len, _results;
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_results = [];
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for (_i = 0, _len = list.length; _i < _len; _i++) {
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slide = list[_i];
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_results.push(new Attentive.Slide(slide));
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}
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return _results;
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})();
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};
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function Slide(dom) {
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this.dom = dom;
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this.deactivate = __bind(this.deactivate, this);
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this.activate = __bind(this.activate, this);
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this.recalculate = __bind(this.recalculate, this);
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}
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Slide.prototype.recalculate = function() {
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var currentMarginTop, height;
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this.dom.style['width'] = "" + window.innerWidth + "px";
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currentMarginTop = Number(this.dom.style['marginTop'].replace(/[^\d\.]/g, ''));
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height = (window.innerHeight - this.dom.querySelector('.content').clientHeight) / 2;
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if (height !== currentMarginTop) {
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this.dom.style['marginTop'] = "" + height + "px";
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return true;
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}
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};
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Slide.prototype.activate = function() {
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return this.dom.classList.add('active');
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};
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Slide.prototype.deactivate = function() {
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return this.dom.classList.remove('active');
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};
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return Slide;
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})();
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var Attentive;
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if (!(typeof Attentive !== "undefined" && Attentive !== null)) Attentive = {};
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Attentive.PresentationTimer = (function() {
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function PresentationTimer() {
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this.time = 0;
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this.el = null;
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}
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PresentationTimer.prototype.render = function() {
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return this.ensureEl().innerHTML = this.formattedTime();
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};
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PresentationTimer.prototype.ensureEl = function() {
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if (!this.el) {
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this.el = this._createDiv();
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this.el.classList.add('timer');
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}
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return this.el;
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};
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PresentationTimer.prototype._createDiv = function() {
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return document.createElement('div');
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};
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PresentationTimer.prototype.addClass = function(className) {
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return this.ensureEl().classList.add(className);
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};
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PresentationTimer.prototype.start = function() {
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this._runner = this.runner();
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return this.addClass('running');
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};
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PresentationTimer.prototype.runner = function() {
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var _this = this;
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return setTimeout(function() {
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return _this.handleRunner();
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}, 1000);
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};
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PresentationTimer.prototype.handleRunner = function() {
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this.render();
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this.time += 1;
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if (this._runner != null) return this.runner();
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};
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PresentationTimer.prototype.stop = function() {
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clearTimeout(this._runner);
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this.ensureEl().classList.remove('running');
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return this._runner = null;
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};
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PresentationTimer.prototype.reset = function() {
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this.stop();
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this.time = 0;
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return this.render();
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};
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PresentationTimer.prototype.toggle = function() {
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if (this._runner != null) {
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return this.stop();
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} else {
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return this.start();
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}
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};
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PresentationTimer.prototype.toggleVisible = function() {
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return this.ensureEl().classList.toggle('hide');
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};
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PresentationTimer.prototype.isVisible = function() {
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return !this.ensureEl().classList.contains('hide');
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};
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PresentationTimer.prototype.hide = function() {
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return this.ensureEl().classList.add('hide');
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};
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PresentationTimer.prototype.formattedTime = function() {
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var minute, second;
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minute = ("00" + (Math.floor(this.time / 60))).slice(-2);
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second = ("00" + (this.time % 60)).slice(-2);
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return "" + minute + ":" + second;
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};
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return PresentationTimer;
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})();
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// Underscore.js 1.3.1
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// (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
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// Underscore is freely distributable under the MIT license.
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// Portions of Underscore are inspired or borrowed from Prototype,
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// Oliver Steele's Functional, and John Resig's Micro-Templating.
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// For all details and documentation:
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// http://documentcloud.github.com/underscore
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(function() {
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// Baseline setup
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// --------------
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// Establish the root object, `window` in the browser, or `global` on the server.
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var root = this;
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// Save the previous value of the `_` variable.
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var previousUnderscore = root._;
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// Establish the object that gets returned to break out of a loop iteration.
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var breaker = {};
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// Save bytes in the minified (but not gzipped) version:
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var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;
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// Create quick reference variables for speed access to core prototypes.
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var slice = ArrayProto.slice,
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unshift = ArrayProto.unshift,
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toString = ObjProto.toString,
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hasOwnProperty = ObjProto.hasOwnProperty;
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// All **ECMAScript 5** native function implementations that we hope to use
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// are declared here.
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var
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nativeForEach = ArrayProto.forEach,
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nativeMap = ArrayProto.map,
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nativeReduce = ArrayProto.reduce,
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nativeReduceRight = ArrayProto.reduceRight,
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nativeFilter = ArrayProto.filter,
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nativeEvery = ArrayProto.every,
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nativeSome = ArrayProto.some,
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nativeIndexOf = ArrayProto.indexOf,
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nativeLastIndexOf = ArrayProto.lastIndexOf,
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nativeIsArray = Array.isArray,
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nativeKeys = Object.keys,
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nativeBind = FuncProto.bind;
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// Create a safe reference to the Underscore object for use below.
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var _ = function(obj) { return new wrapper(obj); };
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// Export the Underscore object for **Node.js**, with
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// backwards-compatibility for the old `require()` API. If we're in
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// the browser, add `_` as a global object via a string identifier,
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// for Closure Compiler "advanced" mode.
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if (typeof exports !== 'undefined') {
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if (typeof module !== 'undefined' && module.exports) {
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exports = module.exports = _;
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}
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exports._ = _;
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} else {
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root['_'] = _;
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}
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// Current version.
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_.VERSION = '1.3.1';
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// Collection Functions
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// --------------------
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// The cornerstone, an `each` implementation, aka `forEach`.
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// Handles objects with the built-in `forEach`, arrays, and raw objects.
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// Delegates to **ECMAScript 5**'s native `forEach` if available.
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var each = _.each = _.forEach = function(obj, iterator, context) {
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if (obj == null) return;
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if (nativeForEach && obj.forEach === nativeForEach) {
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obj.forEach(iterator, context);
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} else if (obj.length === +obj.length) {
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for (var i = 0, l = obj.length; i < l; i++) {
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if (i in obj && iterator.call(context, obj[i], i, obj) === breaker) return;
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}
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} else {
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for (var key in obj) {
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if (_.has(obj, key)) {
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if (iterator.call(context, obj[key], key, obj) === breaker) return;
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}
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}
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}
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};
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// Return the results of applying the iterator to each element.
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// Delegates to **ECMAScript 5**'s native `map` if available.
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_.map = _.collect = function(obj, iterator, context) {
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var results = [];
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if (obj == null) return results;
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if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
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each(obj, function(value, index, list) {
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results[results.length] = iterator.call(context, value, index, list);
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});
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if (obj.length === +obj.length) results.length = obj.length;
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return results;
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};
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// **Reduce** builds up a single result from a list of values, aka `inject`,
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// or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
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_.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
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var initial = arguments.length > 2;
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if (obj == null) obj = [];
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if (nativeReduce && obj.reduce === nativeReduce) {
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if (context) iterator = _.bind(iterator, context);
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return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator);
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}
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each(obj, function(value, index, list) {
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if (!initial) {
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memo = value;
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initial = true;
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} else {
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memo = iterator.call(context, memo, value, index, list);
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}
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});
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if (!initial) throw new TypeError('Reduce of empty array with no initial value');
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return memo;
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};
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// The right-associative version of reduce, also known as `foldr`.
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// Delegates to **ECMAScript 5**'s native `reduceRight` if available.
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_.reduceRight = _.foldr = function(obj, iterator, memo, context) {
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var initial = arguments.length > 2;
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if (obj == null) obj = [];
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if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
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if (context) iterator = _.bind(iterator, context);
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return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
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}
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var reversed = _.toArray(obj).reverse();
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if (context && !initial) iterator = _.bind(iterator, context);
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return initial ? _.reduce(reversed, iterator, memo, context) : _.reduce(reversed, iterator);
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};
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// Return the first value which passes a truth test. Aliased as `detect`.
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_.find = _.detect = function(obj, iterator, context) {
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var result;
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any(obj, function(value, index, list) {
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if (iterator.call(context, value, index, list)) {
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result = value;
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return true;
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}
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});
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return result;
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};
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// Return all the elements that pass a truth test.
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// Delegates to **ECMAScript 5**'s native `filter` if available.
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// Aliased as `select`.
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_.filter = _.select = function(obj, iterator, context) {
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var results = [];
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if (obj == null) return results;
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if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context);
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each(obj, function(value, index, list) {
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if (iterator.call(context, value, index, list)) results[results.length] = value;
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});
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return results;
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};
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// Return all the elements for which a truth test fails.
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_.reject = function(obj, iterator, context) {
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var results = [];
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if (obj == null) return results;
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each(obj, function(value, index, list) {
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if (!iterator.call(context, value, index, list)) results[results.length] = value;
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});
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return results;
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};
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// Determine whether all of the elements match a truth test.
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// Delegates to **ECMAScript 5**'s native `every` if available.
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// Aliased as `all`.
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_.every = _.all = function(obj, iterator, context) {
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var result = true;
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if (obj == null) return result;
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if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context);
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each(obj, function(value, index, list) {
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if (!(result = result && iterator.call(context, value, index, list))) return breaker;
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});
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return result;
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};
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// Determine if at least one element in the object matches a truth test.
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// Delegates to **ECMAScript 5**'s native `some` if available.
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// Aliased as `any`.
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var any = _.some = _.any = function(obj, iterator, context) {
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iterator || (iterator = _.identity);
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var result = false;
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if (obj == null) return result;
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if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
|
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each(obj, function(value, index, list) {
|
|
if (result || (result = iterator.call(context, value, index, list))) return breaker;
|
|
});
|
|
return !!result;
|
|
};
|
|
|
|
// Determine if a given value is included in the array or object using `===`.
|
|
// Aliased as `contains`.
|
|
_.include = _.contains = function(obj, target) {
|
|
var found = false;
|
|
if (obj == null) return found;
|
|
if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
|
|
found = any(obj, function(value) {
|
|
return value === target;
|
|
});
|
|
return found;
|
|
};
|
|
|
|
// Invoke a method (with arguments) on every item in a collection.
|
|
_.invoke = function(obj, method) {
|
|
var args = slice.call(arguments, 2);
|
|
return _.map(obj, function(value) {
|
|
return (_.isFunction(method) ? method || value : value[method]).apply(value, args);
|
|
});
|
|
};
|
|
|
|
// Convenience version of a common use case of `map`: fetching a property.
|
|
_.pluck = function(obj, key) {
|
|
return _.map(obj, function(value){ return value[key]; });
|
|
};
|
|
|
|
// Return the maximum element or (element-based computation).
|
|
_.max = function(obj, iterator, context) {
|
|
if (!iterator && _.isArray(obj)) return Math.max.apply(Math, obj);
|
|
if (!iterator && _.isEmpty(obj)) return -Infinity;
|
|
var result = {computed : -Infinity};
|
|
each(obj, function(value, index, list) {
|
|
var computed = iterator ? iterator.call(context, value, index, list) : value;
|
|
computed >= result.computed && (result = {value : value, computed : computed});
|
|
});
|
|
return result.value;
|
|
};
|
|
|
|
// Return the minimum element (or element-based computation).
|
|
_.min = function(obj, iterator, context) {
|
|
if (!iterator && _.isArray(obj)) return Math.min.apply(Math, obj);
|
|
if (!iterator && _.isEmpty(obj)) return Infinity;
|
|
var result = {computed : Infinity};
|
|
each(obj, function(value, index, list) {
|
|
var computed = iterator ? iterator.call(context, value, index, list) : value;
|
|
computed < result.computed && (result = {value : value, computed : computed});
|
|
});
|
|
return result.value;
|
|
};
|
|
|
|
// Shuffle an array.
|
|
_.shuffle = function(obj) {
|
|
var shuffled = [], rand;
|
|
each(obj, function(value, index, list) {
|
|
if (index == 0) {
|
|
shuffled[0] = value;
|
|
} else {
|
|
rand = Math.floor(Math.random() * (index + 1));
|
|
shuffled[index] = shuffled[rand];
|
|
shuffled[rand] = value;
|
|
}
|
|
});
|
|
return shuffled;
|
|
};
|
|
|
|
// Sort the object's values by a criterion produced by an iterator.
|
|
_.sortBy = function(obj, iterator, context) {
|
|
return _.pluck(_.map(obj, function(value, index, list) {
|
|
return {
|
|
value : value,
|
|
criteria : iterator.call(context, value, index, list)
|
|
};
|
|
}).sort(function(left, right) {
|
|
var a = left.criteria, b = right.criteria;
|
|
return a < b ? -1 : a > b ? 1 : 0;
|
|
}), 'value');
|
|
};
|
|
|
|
// Groups the object's values by a criterion. Pass either a string attribute
|
|
// to group by, or a function that returns the criterion.
|
|
_.groupBy = function(obj, val) {
|
|
var result = {};
|
|
var iterator = _.isFunction(val) ? val : function(obj) { return obj[val]; };
|
|
each(obj, function(value, index) {
|
|
var key = iterator(value, index);
|
|
(result[key] || (result[key] = [])).push(value);
|
|
});
|
|
return result;
|
|
};
|
|
|
|
// Use a comparator function to figure out at what index an object should
|
|
// be inserted so as to maintain order. Uses binary search.
|
|
_.sortedIndex = function(array, obj, iterator) {
|
|
iterator || (iterator = _.identity);
|
|
var low = 0, high = array.length;
|
|
while (low < high) {
|
|
var mid = (low + high) >> 1;
|
|
iterator(array[mid]) < iterator(obj) ? low = mid + 1 : high = mid;
|
|
}
|
|
return low;
|
|
};
|
|
|
|
// Safely convert anything iterable into a real, live array.
|
|
_.toArray = function(iterable) {
|
|
if (!iterable) return [];
|
|
if (iterable.toArray) return iterable.toArray();
|
|
if (_.isArray(iterable)) return slice.call(iterable);
|
|
if (_.isArguments(iterable)) return slice.call(iterable);
|
|
return _.values(iterable);
|
|
};
|
|
|
|
// Return the number of elements in an object.
|
|
_.size = function(obj) {
|
|
return _.toArray(obj).length;
|
|
};
|
|
|
|
// Array Functions
|
|
// ---------------
|
|
|
|
// Get the first element of an array. Passing **n** will return the first N
|
|
// values in the array. Aliased as `head`. The **guard** check allows it to work
|
|
// with `_.map`.
|
|
_.first = _.head = function(array, n, guard) {
|
|
return (n != null) && !guard ? slice.call(array, 0, n) : array[0];
|
|
};
|
|
|
|
// Returns everything but the last entry of the array. Especcialy useful on
|
|
// the arguments object. Passing **n** will return all the values in
|
|
// the array, excluding the last N. The **guard** check allows it to work with
|
|
// `_.map`.
|
|
_.initial = function(array, n, guard) {
|
|
return slice.call(array, 0, array.length - ((n == null) || guard ? 1 : n));
|
|
};
|
|
|
|
// Get the last element of an array. Passing **n** will return the last N
|
|
// values in the array. The **guard** check allows it to work with `_.map`.
|
|
_.last = function(array, n, guard) {
|
|
if ((n != null) && !guard) {
|
|
return slice.call(array, Math.max(array.length - n, 0));
|
|
} else {
|
|
return array[array.length - 1];
|
|
}
|
|
};
|
|
|
|
// Returns everything but the first entry of the array. Aliased as `tail`.
|
|
// Especially useful on the arguments object. Passing an **index** will return
|
|
// the rest of the values in the array from that index onward. The **guard**
|
|
// check allows it to work with `_.map`.
|
|
_.rest = _.tail = function(array, index, guard) {
|
|
return slice.call(array, (index == null) || guard ? 1 : index);
|
|
};
|
|
|
|
// Trim out all falsy values from an array.
|
|
_.compact = function(array) {
|
|
return _.filter(array, function(value){ return !!value; });
|
|
};
|
|
|
|
// Return a completely flattened version of an array.
|
|
_.flatten = function(array, shallow) {
|
|
return _.reduce(array, function(memo, value) {
|
|
if (_.isArray(value)) return memo.concat(shallow ? value : _.flatten(value));
|
|
memo[memo.length] = value;
|
|
return memo;
|
|
}, []);
|
|
};
|
|
|
|
// Return a version of the array that does not contain the specified value(s).
|
|
_.without = function(array) {
|
|
return _.difference(array, slice.call(arguments, 1));
|
|
};
|
|
|
|
// Produce a duplicate-free version of the array. If the array has already
|
|
// been sorted, you have the option of using a faster algorithm.
|
|
// Aliased as `unique`.
|
|
_.uniq = _.unique = function(array, isSorted, iterator) {
|
|
var initial = iterator ? _.map(array, iterator) : array;
|
|
var result = [];
|
|
_.reduce(initial, function(memo, el, i) {
|
|
if (0 == i || (isSorted === true ? _.last(memo) != el : !_.include(memo, el))) {
|
|
memo[memo.length] = el;
|
|
result[result.length] = array[i];
|
|
}
|
|
return memo;
|
|
}, []);
|
|
return result;
|
|
};
|
|
|
|
// Produce an array that contains the union: each distinct element from all of
|
|
// the passed-in arrays.
|
|
_.union = function() {
|
|
return _.uniq(_.flatten(arguments, true));
|
|
};
|
|
|
|
// Produce an array that contains every item shared between all the
|
|
// passed-in arrays. (Aliased as "intersect" for back-compat.)
|
|
_.intersection = _.intersect = function(array) {
|
|
var rest = slice.call(arguments, 1);
|
|
return _.filter(_.uniq(array), function(item) {
|
|
return _.every(rest, function(other) {
|
|
return _.indexOf(other, item) >= 0;
|
|
});
|
|
});
|
|
};
|
|
|
|
// Take the difference between one array and a number of other arrays.
|
|
// Only the elements present in just the first array will remain.
|
|
_.difference = function(array) {
|
|
var rest = _.flatten(slice.call(arguments, 1));
|
|
return _.filter(array, function(value){ return !_.include(rest, value); });
|
|
};
|
|
|
|
// Zip together multiple lists into a single array -- elements that share
|
|
// an index go together.
|
|
_.zip = function() {
|
|
var args = slice.call(arguments);
|
|
var length = _.max(_.pluck(args, 'length'));
|
|
var results = new Array(length);
|
|
for (var i = 0; i < length; i++) results[i] = _.pluck(args, "" + i);
|
|
return results;
|
|
};
|
|
|
|
// If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),
|
|
// we need this function. Return the position of the first occurrence of an
|
|
// item in an array, or -1 if the item is not included in the array.
|
|
// Delegates to **ECMAScript 5**'s native `indexOf` if available.
|
|
// If the array is large and already in sort order, pass `true`
|
|
// for **isSorted** to use binary search.
|
|
_.indexOf = function(array, item, isSorted) {
|
|
if (array == null) return -1;
|
|
var i, l;
|
|
if (isSorted) {
|
|
i = _.sortedIndex(array, item);
|
|
return array[i] === item ? i : -1;
|
|
}
|
|
if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item);
|
|
for (i = 0, l = array.length; i < l; i++) if (i in array && array[i] === item) return i;
|
|
return -1;
|
|
};
|
|
|
|
// Delegates to **ECMAScript 5**'s native `lastIndexOf` if available.
|
|
_.lastIndexOf = function(array, item) {
|
|
if (array == null) return -1;
|
|
if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item);
|
|
var i = array.length;
|
|
while (i--) if (i in array && array[i] === item) return i;
|
|
return -1;
|
|
};
|
|
|
|
// Generate an integer Array containing an arithmetic progression. A port of
|
|
// the native Python `range()` function. See
|
|
// [the Python documentation](http://docs.python.org/library/functions.html#range).
|
|
_.range = function(start, stop, step) {
|
|
if (arguments.length <= 1) {
|
|
stop = start || 0;
|
|
start = 0;
|
|
}
|
|
step = arguments[2] || 1;
|
|
|
|
var len = Math.max(Math.ceil((stop - start) / step), 0);
|
|
var idx = 0;
|
|
var range = new Array(len);
|
|
|
|
while(idx < len) {
|
|
range[idx++] = start;
|
|
start += step;
|
|
}
|
|
|
|
return range;
|
|
};
|
|
|
|
// Function (ahem) Functions
|
|
// ------------------
|
|
|
|
// Reusable constructor function for prototype setting.
|
|
var ctor = function(){};
|
|
|
|
// Create a function bound to a given object (assigning `this`, and arguments,
|
|
// optionally). Binding with arguments is also known as `curry`.
|
|
// Delegates to **ECMAScript 5**'s native `Function.bind` if available.
|
|
// We check for `func.bind` first, to fail fast when `func` is undefined.
|
|
_.bind = function bind(func, context) {
|
|
var bound, args;
|
|
if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
|
|
if (!_.isFunction(func)) throw new TypeError;
|
|
args = slice.call(arguments, 2);
|
|
return bound = function() {
|
|
if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
|
|
ctor.prototype = func.prototype;
|
|
var self = new ctor;
|
|
var result = func.apply(self, args.concat(slice.call(arguments)));
|
|
if (Object(result) === result) return result;
|
|
return self;
|
|
};
|
|
};
|
|
|
|
// Bind all of an object's methods to that object. Useful for ensuring that
|
|
// all callbacks defined on an object belong to it.
|
|
_.bindAll = function(obj) {
|
|
var funcs = slice.call(arguments, 1);
|
|
if (funcs.length == 0) funcs = _.functions(obj);
|
|
each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
|
|
return obj;
|
|
};
|
|
|
|
// Memoize an expensive function by storing its results.
|
|
_.memoize = function(func, hasher) {
|
|
var memo = {};
|
|
hasher || (hasher = _.identity);
|
|
return function() {
|
|
var key = hasher.apply(this, arguments);
|
|
return _.has(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments));
|
|
};
|
|
};
|
|
|
|
// Delays a function for the given number of milliseconds, and then calls
|
|
// it with the arguments supplied.
|
|
_.delay = function(func, wait) {
|
|
var args = slice.call(arguments, 2);
|
|
return setTimeout(function(){ return func.apply(func, args); }, wait);
|
|
};
|
|
|
|
// Defers a function, scheduling it to run after the current call stack has
|
|
// cleared.
|
|
_.defer = function(func) {
|
|
return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
|
|
};
|
|
|
|
// Returns a function, that, when invoked, will only be triggered at most once
|
|
// during a given window of time.
|
|
_.throttle = function(func, wait) {
|
|
var context, args, timeout, throttling, more;
|
|
var whenDone = _.debounce(function(){ more = throttling = false; }, wait);
|
|
return function() {
|
|
context = this; args = arguments;
|
|
var later = function() {
|
|
timeout = null;
|
|
if (more) func.apply(context, args);
|
|
whenDone();
|
|
};
|
|
if (!timeout) timeout = setTimeout(later, wait);
|
|
if (throttling) {
|
|
more = true;
|
|
} else {
|
|
func.apply(context, args);
|
|
}
|
|
whenDone();
|
|
throttling = true;
|
|
};
|
|
};
|
|
|
|
// Returns a function, that, as long as it continues to be invoked, will not
|
|
// be triggered. The function will be called after it stops being called for
|
|
// N milliseconds.
|
|
_.debounce = function(func, wait) {
|
|
var timeout;
|
|
return function() {
|
|
var context = this, args = arguments;
|
|
var later = function() {
|
|
timeout = null;
|
|
func.apply(context, args);
|
|
};
|
|
clearTimeout(timeout);
|
|
timeout = setTimeout(later, wait);
|
|
};
|
|
};
|
|
|
|
// Returns a function that will be executed at most one time, no matter how
|
|
// often you call it. Useful for lazy initialization.
|
|
_.once = function(func) {
|
|
var ran = false, memo;
|
|
return function() {
|
|
if (ran) return memo;
|
|
ran = true;
|
|
return memo = func.apply(this, arguments);
|
|
};
|
|
};
|
|
|
|
// Returns the first function passed as an argument to the second,
|
|
// allowing you to adjust arguments, run code before and after, and
|
|
// conditionally execute the original function.
|
|
_.wrap = function(func, wrapper) {
|
|
return function() {
|
|
var args = [func].concat(slice.call(arguments, 0));
|
|
return wrapper.apply(this, args);
|
|
};
|
|
};
|
|
|
|
// Returns a function that is the composition of a list of functions, each
|
|
// consuming the return value of the function that follows.
|
|
_.compose = function() {
|
|
var funcs = arguments;
|
|
return function() {
|
|
var args = arguments;
|
|
for (var i = funcs.length - 1; i >= 0; i--) {
|
|
args = [funcs[i].apply(this, args)];
|
|
}
|
|
return args[0];
|
|
};
|
|
};
|
|
|
|
// Returns a function that will only be executed after being called N times.
|
|
_.after = function(times, func) {
|
|
if (times <= 0) return func();
|
|
return function() {
|
|
if (--times < 1) { return func.apply(this, arguments); }
|
|
};
|
|
};
|
|
|
|
// Object Functions
|
|
// ----------------
|
|
|
|
// Retrieve the names of an object's properties.
|
|
// Delegates to **ECMAScript 5**'s native `Object.keys`
|
|
_.keys = nativeKeys || function(obj) {
|
|
if (obj !== Object(obj)) throw new TypeError('Invalid object');
|
|
var keys = [];
|
|
for (var key in obj) if (_.has(obj, key)) keys[keys.length] = key;
|
|
return keys;
|
|
};
|
|
|
|
// Retrieve the values of an object's properties.
|
|
_.values = function(obj) {
|
|
return _.map(obj, _.identity);
|
|
};
|
|
|
|
// Return a sorted list of the function names available on the object.
|
|
// Aliased as `methods`
|
|
_.functions = _.methods = function(obj) {
|
|
var names = [];
|
|
for (var key in obj) {
|
|
if (_.isFunction(obj[key])) names.push(key);
|
|
}
|
|
return names.sort();
|
|
};
|
|
|
|
// Extend a given object with all the properties in passed-in object(s).
|
|
_.extend = function(obj) {
|
|
each(slice.call(arguments, 1), function(source) {
|
|
for (var prop in source) {
|
|
obj[prop] = source[prop];
|
|
}
|
|
});
|
|
return obj;
|
|
};
|
|
|
|
// Fill in a given object with default properties.
|
|
_.defaults = function(obj) {
|
|
each(slice.call(arguments, 1), function(source) {
|
|
for (var prop in source) {
|
|
if (obj[prop] == null) obj[prop] = source[prop];
|
|
}
|
|
});
|
|
return obj;
|
|
};
|
|
|
|
// Create a (shallow-cloned) duplicate of an object.
|
|
_.clone = function(obj) {
|
|
if (!_.isObject(obj)) return obj;
|
|
return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
|
|
};
|
|
|
|
// Invokes interceptor with the obj, and then returns obj.
|
|
// The primary purpose of this method is to "tap into" a method chain, in
|
|
// order to perform operations on intermediate results within the chain.
|
|
_.tap = function(obj, interceptor) {
|
|
interceptor(obj);
|
|
return obj;
|
|
};
|
|
|
|
// Internal recursive comparison function.
|
|
function eq(a, b, stack) {
|
|
// Identical objects are equal. `0 === -0`, but they aren't identical.
|
|
// See the Harmony `egal` proposal: http://wiki.ecmascript.org/doku.php?id=harmony:egal.
|
|
if (a === b) return a !== 0 || 1 / a == 1 / b;
|
|
// A strict comparison is necessary because `null == undefined`.
|
|
if (a == null || b == null) return a === b;
|
|
// Unwrap any wrapped objects.
|
|
if (a._chain) a = a._wrapped;
|
|
if (b._chain) b = b._wrapped;
|
|
// Invoke a custom `isEqual` method if one is provided.
|
|
if (a.isEqual && _.isFunction(a.isEqual)) return a.isEqual(b);
|
|
if (b.isEqual && _.isFunction(b.isEqual)) return b.isEqual(a);
|
|
// Compare `[[Class]]` names.
|
|
var className = toString.call(a);
|
|
if (className != toString.call(b)) return false;
|
|
switch (className) {
|
|
// Strings, numbers, dates, and booleans are compared by value.
|
|
case '[object String]':
|
|
// Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
|
|
// equivalent to `new String("5")`.
|
|
return a == String(b);
|
|
case '[object Number]':
|
|
// `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for
|
|
// other numeric values.
|
|
return a != +a ? b != +b : (a == 0 ? 1 / a == 1 / b : a == +b);
|
|
case '[object Date]':
|
|
case '[object Boolean]':
|
|
// Coerce dates and booleans to numeric primitive values. Dates are compared by their
|
|
// millisecond representations. Note that invalid dates with millisecond representations
|
|
// of `NaN` are not equivalent.
|
|
return +a == +b;
|
|
// RegExps are compared by their source patterns and flags.
|
|
case '[object RegExp]':
|
|
return a.source == b.source &&
|
|
a.global == b.global &&
|
|
a.multiline == b.multiline &&
|
|
a.ignoreCase == b.ignoreCase;
|
|
}
|
|
if (typeof a != 'object' || typeof b != 'object') return false;
|
|
// Assume equality for cyclic structures. The algorithm for detecting cyclic
|
|
// structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
|
|
var length = stack.length;
|
|
while (length--) {
|
|
// Linear search. Performance is inversely proportional to the number of
|
|
// unique nested structures.
|
|
if (stack[length] == a) return true;
|
|
}
|
|
// Add the first object to the stack of traversed objects.
|
|
stack.push(a);
|
|
var size = 0, result = true;
|
|
// Recursively compare objects and arrays.
|
|
if (className == '[object Array]') {
|
|
// Compare array lengths to determine if a deep comparison is necessary.
|
|
size = a.length;
|
|
result = size == b.length;
|
|
if (result) {
|
|
// Deep compare the contents, ignoring non-numeric properties.
|
|
while (size--) {
|
|
// Ensure commutative equality for sparse arrays.
|
|
if (!(result = size in a == size in b && eq(a[size], b[size], stack))) break;
|
|
}
|
|
}
|
|
} else {
|
|
// Objects with different constructors are not equivalent.
|
|
if ('constructor' in a != 'constructor' in b || a.constructor != b.constructor) return false;
|
|
// Deep compare objects.
|
|
for (var key in a) {
|
|
if (_.has(a, key)) {
|
|
// Count the expected number of properties.
|
|
size++;
|
|
// Deep compare each member.
|
|
if (!(result = _.has(b, key) && eq(a[key], b[key], stack))) break;
|
|
}
|
|
}
|
|
// Ensure that both objects contain the same number of properties.
|
|
if (result) {
|
|
for (key in b) {
|
|
if (_.has(b, key) && !(size--)) break;
|
|
}
|
|
result = !size;
|
|
}
|
|
}
|
|
// Remove the first object from the stack of traversed objects.
|
|
stack.pop();
|
|
return result;
|
|
}
|
|
|
|
// Perform a deep comparison to check if two objects are equal.
|
|
_.isEqual = function(a, b) {
|
|
return eq(a, b, []);
|
|
};
|
|
|
|
// Is a given array, string, or object empty?
|
|
// An "empty" object has no enumerable own-properties.
|
|
_.isEmpty = function(obj) {
|
|
if (_.isArray(obj) || _.isString(obj)) return obj.length === 0;
|
|
for (var key in obj) if (_.has(obj, key)) return false;
|
|
return true;
|
|
};
|
|
|
|
// Is a given value a DOM element?
|
|
_.isElement = function(obj) {
|
|
return !!(obj && obj.nodeType == 1);
|
|
};
|
|
|
|
// Is a given value an array?
|
|
// Delegates to ECMA5's native Array.isArray
|
|
_.isArray = nativeIsArray || function(obj) {
|
|
return toString.call(obj) == '[object Array]';
|
|
};
|
|
|
|
// Is a given variable an object?
|
|
_.isObject = function(obj) {
|
|
return obj === Object(obj);
|
|
};
|
|
|
|
// Is a given variable an arguments object?
|
|
_.isArguments = function(obj) {
|
|
return toString.call(obj) == '[object Arguments]';
|
|
};
|
|
if (!_.isArguments(arguments)) {
|
|
_.isArguments = function(obj) {
|
|
return !!(obj && _.has(obj, 'callee'));
|
|
};
|
|
}
|
|
|
|
// Is a given value a function?
|
|
_.isFunction = function(obj) {
|
|
return toString.call(obj) == '[object Function]';
|
|
};
|
|
|
|
// Is a given value a string?
|
|
_.isString = function(obj) {
|
|
return toString.call(obj) == '[object String]';
|
|
};
|
|
|
|
// Is a given value a number?
|
|
_.isNumber = function(obj) {
|
|
return toString.call(obj) == '[object Number]';
|
|
};
|
|
|
|
// Is the given value `NaN`?
|
|
_.isNaN = function(obj) {
|
|
// `NaN` is the only value for which `===` is not reflexive.
|
|
return obj !== obj;
|
|
};
|
|
|
|
// Is a given value a boolean?
|
|
_.isBoolean = function(obj) {
|
|
return obj === true || obj === false || toString.call(obj) == '[object Boolean]';
|
|
};
|
|
|
|
// Is a given value a date?
|
|
_.isDate = function(obj) {
|
|
return toString.call(obj) == '[object Date]';
|
|
};
|
|
|
|
// Is the given value a regular expression?
|
|
_.isRegExp = function(obj) {
|
|
return toString.call(obj) == '[object RegExp]';
|
|
};
|
|
|
|
// Is a given value equal to null?
|
|
_.isNull = function(obj) {
|
|
return obj === null;
|
|
};
|
|
|
|
// Is a given variable undefined?
|
|
_.isUndefined = function(obj) {
|
|
return obj === void 0;
|
|
};
|
|
|
|
// Has own property?
|
|
_.has = function(obj, key) {
|
|
return hasOwnProperty.call(obj, key);
|
|
};
|
|
|
|
// Utility Functions
|
|
// -----------------
|
|
|
|
// Run Underscore.js in *noConflict* mode, returning the `_` variable to its
|
|
// previous owner. Returns a reference to the Underscore object.
|
|
_.noConflict = function() {
|
|
root._ = previousUnderscore;
|
|
return this;
|
|
};
|
|
|
|
// Keep the identity function around for default iterators.
|
|
_.identity = function(value) {
|
|
return value;
|
|
};
|
|
|
|
// Run a function **n** times.
|
|
_.times = function (n, iterator, context) {
|
|
for (var i = 0; i < n; i++) iterator.call(context, i);
|
|
};
|
|
|
|
// Escape a string for HTML interpolation.
|
|
_.escape = function(string) {
|
|
return (''+string).replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"').replace(/'/g, ''').replace(/\//g,'/');
|
|
};
|
|
|
|
// Add your own custom functions to the Underscore object, ensuring that
|
|
// they're correctly added to the OOP wrapper as well.
|
|
_.mixin = function(obj) {
|
|
each(_.functions(obj), function(name){
|
|
addToWrapper(name, _[name] = obj[name]);
|
|
});
|
|
};
|
|
|
|
// Generate a unique integer id (unique within the entire client session).
|
|
// Useful for temporary DOM ids.
|
|
var idCounter = 0;
|
|
_.uniqueId = function(prefix) {
|
|
var id = idCounter++;
|
|
return prefix ? prefix + id : id;
|
|
};
|
|
|
|
// By default, Underscore uses ERB-style template delimiters, change the
|
|
// following template settings to use alternative delimiters.
|
|
_.templateSettings = {
|
|
evaluate : /<%([\s\S]+?)%>/g,
|
|
interpolate : /<%=([\s\S]+?)%>/g,
|
|
escape : /<%-([\s\S]+?)%>/g
|
|
};
|
|
|
|
// When customizing `templateSettings`, if you don't want to define an
|
|
// interpolation, evaluation or escaping regex, we need one that is
|
|
// guaranteed not to match.
|
|
var noMatch = /.^/;
|
|
|
|
// Within an interpolation, evaluation, or escaping, remove HTML escaping
|
|
// that had been previously added.
|
|
var unescape = function(code) {
|
|
return code.replace(/\\\\/g, '\\').replace(/\\'/g, "'");
|
|
};
|
|
|
|
// JavaScript micro-templating, similar to John Resig's implementation.
|
|
// Underscore templating handles arbitrary delimiters, preserves whitespace,
|
|
// and correctly escapes quotes within interpolated code.
|
|
_.template = function(str, data) {
|
|
var c = _.templateSettings;
|
|
var tmpl = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' +
|
|
'with(obj||{}){__p.push(\'' +
|
|
str.replace(/\\/g, '\\\\')
|
|
.replace(/'/g, "\\'")
|
|
.replace(c.escape || noMatch, function(match, code) {
|
|
return "',_.escape(" + unescape(code) + "),'";
|
|
})
|
|
.replace(c.interpolate || noMatch, function(match, code) {
|
|
return "'," + unescape(code) + ",'";
|
|
})
|
|
.replace(c.evaluate || noMatch, function(match, code) {
|
|
return "');" + unescape(code).replace(/[\r\n\t]/g, ' ') + ";__p.push('";
|
|
})
|
|
.replace(/\r/g, '\\r')
|
|
.replace(/\n/g, '\\n')
|
|
.replace(/\t/g, '\\t')
|
|
+ "');}return __p.join('');";
|
|
var func = new Function('obj', '_', tmpl);
|
|
if (data) return func(data, _);
|
|
return function(data) {
|
|
return func.call(this, data, _);
|
|
};
|
|
};
|
|
|
|
// Add a "chain" function, which will delegate to the wrapper.
|
|
_.chain = function(obj) {
|
|
return _(obj).chain();
|
|
};
|
|
|
|
// The OOP Wrapper
|
|
// ---------------
|
|
|
|
// If Underscore is called as a function, it returns a wrapped object that
|
|
// can be used OO-style. This wrapper holds altered versions of all the
|
|
// underscore functions. Wrapped objects may be chained.
|
|
var wrapper = function(obj) { this._wrapped = obj; };
|
|
|
|
// Expose `wrapper.prototype` as `_.prototype`
|
|
_.prototype = wrapper.prototype;
|
|
|
|
// Helper function to continue chaining intermediate results.
|
|
var result = function(obj, chain) {
|
|
return chain ? _(obj).chain() : obj;
|
|
};
|
|
|
|
// A method to easily add functions to the OOP wrapper.
|
|
var addToWrapper = function(name, func) {
|
|
wrapper.prototype[name] = function() {
|
|
var args = slice.call(arguments);
|
|
unshift.call(args, this._wrapped);
|
|
return result(func.apply(_, args), this._chain);
|
|
};
|
|
};
|
|
|
|
// Add all of the Underscore functions to the wrapper object.
|
|
_.mixin(_);
|
|
|
|
// Add all mutator Array functions to the wrapper.
|
|
each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
|
|
var method = ArrayProto[name];
|
|
wrapper.prototype[name] = function() {
|
|
var wrapped = this._wrapped;
|
|
method.apply(wrapped, arguments);
|
|
var length = wrapped.length;
|
|
if ((name == 'shift' || name == 'splice') && length === 0) delete wrapped[0];
|
|
return result(wrapped, this._chain);
|
|
};
|
|
});
|
|
|
|
// Add all accessor Array functions to the wrapper.
|
|
each(['concat', 'join', 'slice'], function(name) {
|
|
var method = ArrayProto[name];
|
|
wrapper.prototype[name] = function() {
|
|
return result(method.apply(this._wrapped, arguments), this._chain);
|
|
};
|
|
});
|
|
|
|
// Start chaining a wrapped Underscore object.
|
|
wrapper.prototype.chain = function() {
|
|
this._chain = true;
|
|
return this;
|
|
};
|
|
|
|
// Extracts the result from a wrapped and chained object.
|
|
wrapper.prototype.value = function() {
|
|
return this._wrapped;
|
|
};
|
|
|
|
}).call(this);
|
|
|
|
|
|
|
|
Attentive.Presentation.setup('#slides');
|