391 lines
12 KiB
JavaScript
391 lines
12 KiB
JavaScript
(function() {
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var doc = document;
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var disableBuilds = true;
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var ctr = 0;
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var spaces = /\s+/, a1 = [''];
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var toArray = function(list) {
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return Array.prototype.slice.call(list || [], 0);
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};
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var byId = function(id) {
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if (typeof id == 'string') { return doc.getElementById(id); }
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return id;
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};
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var query = function(query, root) {
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if (!query) { return []; }
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if (typeof query != 'string') { return toArray(query); }
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if (typeof root == 'string') {
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root = byId(root);
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if(!root){ return []; }
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}
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root = root || document;
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var rootIsDoc = (root.nodeType == 9);
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var doc = rootIsDoc ? root : (root.ownerDocument || document);
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// rewrite the query to be ID rooted
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if (!rootIsDoc || ('>~+'.indexOf(query.charAt(0)) >= 0)) {
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root.id = root.id || ('qUnique' + (ctr++));
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query = '#' + root.id + ' ' + query;
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}
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// don't choke on something like ".yada.yada >"
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if ('>~+'.indexOf(query.slice(-1)) >= 0) { query += ' *'; }
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return toArray(doc.querySelectorAll(query));
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};
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var strToArray = function(s) {
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if (typeof s == 'string' || s instanceof String) {
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if (s.indexOf(' ') < 0) {
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a1[0] = s;
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return a1;
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} else {
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return s.split(spaces);
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}
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}
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return s;
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};
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var addClass = function(node, classStr) {
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classStr = strToArray(classStr);
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var cls = ' ' + node.className + ' ';
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for (var i = 0, len = classStr.length, c; i < len; ++i) {
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c = classStr[i];
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if (c && cls.indexOf(' ' + c + ' ') < 0) {
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cls += c + ' ';
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}
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}
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node.className = cls.trim();
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};
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var removeClass = function(node, classStr) {
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var cls;
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if (classStr !== undefined) {
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classStr = strToArray(classStr);
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cls = ' ' + node.className + ' ';
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for (var i = 0, len = classStr.length; i < len; ++i) {
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cls = cls.replace(' ' + classStr[i] + ' ', ' ');
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}
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cls = cls.trim();
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} else {
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cls = '';
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}
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if (node.className != cls) {
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node.className = cls;
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}
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};
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var toggleClass = function(node, classStr) {
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var cls = ' ' + node.className + ' ';
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if (cls.indexOf(' ' + classStr.trim() + ' ') >= 0) {
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removeClass(node, classStr);
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} else {
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addClass(node, classStr);
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}
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};
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var ua = navigator.userAgent;
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var isFF = parseFloat(ua.split('Firefox/')[1]) || undefined;
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var isWK = parseFloat(ua.split('WebKit/')[1]) || undefined;
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var isOpera = parseFloat(ua.split('Opera/')[1]) || undefined;
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var canTransition = (function() {
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var ver = parseFloat(ua.split('Version/')[1]) || undefined;
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// test to determine if this browser can handle CSS transitions.
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var cachedCanTransition =
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(isWK || (isFF && isFF > 3.6 ) || (isOpera && ver >= 10.5));
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return function() { return cachedCanTransition; }
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})();
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//
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// Slide class
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//
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var Slide = function(node, idx) {
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this._node = node;
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if (idx >= 0) {
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this._count = idx + 1;
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}
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if (this._node) {
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addClass(this._node, 'slide distant-slide');
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}
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this._makeCounter();
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this._makeBuildList();
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};
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Slide.prototype = {
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_node: null,
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_count: 0,
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_buildList: [],
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_visited: false,
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_currentState: '',
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_states: [ 'distant-slide', 'far-past',
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'past', 'current', 'future',
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'far-future', 'distant-slide' ],
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setState: function(state) {
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if (typeof state != 'string') {
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state = this._states[state];
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}
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if (state == 'current' && !this._visited) {
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this._visited = true;
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this._makeBuildList();
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}
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removeClass(this._node, this._states);
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addClass(this._node, state);
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this._currentState = state;
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// delay first auto run. Really wish this were in CSS.
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/*
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this._runAutos();
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*/
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var _t = this;
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setTimeout(function(){ _t._runAutos(); } , 400);
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},
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_makeCounter: function() {
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if(!this._count || !this._node) { return; }
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var c = doc.createElement('span');
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c.innerHTML = this._count;
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c.className = 'counter';
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this._node.appendChild(c);
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},
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_makeBuildList: function() {
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this._buildList = [];
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if (disableBuilds) { return; }
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if (this._node) {
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this._buildList = query('[data-build] > *', this._node);
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}
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this._buildList.forEach(function(el) {
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addClass(el, 'to-build');
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});
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},
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_runAutos: function() {
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if (this._currentState != 'current') {
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return;
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}
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// find the next auto, slice it out of the list, and run it
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var idx = -1;
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this._buildList.some(function(n, i) {
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if (n.hasAttribute('data-auto')) {
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idx = i;
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return true;
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}
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return false;
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});
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if (idx >= 0) {
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var elem = this._buildList.splice(idx, 1)[0];
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var transitionEnd = isWK ? 'webkitTransitionEnd' : (isFF ? 'mozTransitionEnd' : 'oTransitionEnd');
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var _t = this;
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if (canTransition()) {
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var l = function(evt) {
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elem.parentNode.removeEventListener(transitionEnd, l, false);
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_t._runAutos();
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};
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elem.parentNode.addEventListener(transitionEnd, l, false);
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removeClass(elem, 'to-build');
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} else {
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setTimeout(function() {
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removeClass(elem, 'to-build');
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_t._runAutos();
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}, 400);
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}
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}
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},
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buildNext: function() {
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if (!this._buildList.length) {
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return false;
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}
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removeClass(this._buildList.shift(), 'to-build');
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return true;
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},
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};
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//
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// SlideShow class
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//
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var SlideShow = function(slides) {
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this._slides = (slides || []).map(function(el, idx) {
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return new Slide(el, idx);
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});
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var h = window.location.hash;
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try {
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this.current = parseInt(h.split('#slide')[1], 10);
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}catch (e) { /* squeltch */ }
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this.current = isNaN(this.current) ? 1 : this.current;
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var _t = this;
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doc.addEventListener('keydown',
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function(e) { _t.handleKeys(e); }, false);
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doc.addEventListener('mousewheel',
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function(e) { _t.handleWheel(e); }, false);
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doc.addEventListener('DOMMouseScroll',
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function(e) { _t.handleWheel(e); }, false);
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doc.addEventListener('touchstart',
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function(e) { _t.handleTouchStart(e); }, false);
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doc.addEventListener('touchend',
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function(e) { _t.handleTouchEnd(e); }, false);
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window.addEventListener('popstate',
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function(e) { _t.go(e.state); }, false);
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this._update();
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};
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SlideShow.prototype = {
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_slides: [],
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_update: function(dontPush) {
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document.querySelector('#presentation-counter').innerText = this.current;
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if (history.pushState) {
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if (!dontPush) {
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history.pushState(this.current, 'Slide ' + this.current, '#slide' + this.current);
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}
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} else {
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window.location.hash = 'slide' + this.current;
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}
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for (var x = this.current-1; x < this.current + 7; x++) {
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if (this._slides[x-4]) {
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this._slides[x-4].setState(Math.max(0, x-this.current));
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}
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}
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},
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current: 0,
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next: function() {
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if (!this._slides[this.current-1].buildNext()) {
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this.current = Math.min(this.current + 1, this._slides.length);
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this._update();
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}
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},
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prev: function() {
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this.current = Math.max(this.current-1, 1);
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this._update();
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},
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go: function(num) {
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if (history.pushState && this.current != num) {
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history.replaceState(this.current, 'Slide ' + this.current, '#slide' + this.current);
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}
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this.current = num;
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this._update(true);
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},
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_notesOn: false,
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showNotes: function() {
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var isOn = this._notesOn = !this._notesOn;
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query('.notes').forEach(function(el) {
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el.style.display = (notesOn) ? 'block' : 'none';
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});
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},
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switch3D: function() {
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toggleClass(document.body, 'three-d');
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},
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handleWheel: function(e) {
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var delta = 0;
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if (e.wheelDelta) {
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delta = e.wheelDelta/120;
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if (isOpera) {
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delta = -delta;
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}
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} else if (e.detail) {
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delta = -e.detail/3;
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}
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if (delta > 0 ) {
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this.prev();
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return;
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}
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if (delta < 0 ) {
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this.next();
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return;
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}
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},
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handleKeys: function(e) {
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if (/^(input|textarea)$/i.test(e.target.nodeName)) return;
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switch (e.keyCode) {
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case 37: // left arrow
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this.prev(); break;
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case 39: // right arrow
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case 32: // space
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this.next(); break;
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case 50: // 2
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this.showNotes(); break;
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case 51: // 3
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this.switch3D(); break;
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}
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},
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_touchStartX: 0,
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handleTouchStart: function(e) {
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this._touchStartX = e.touches[0].pageX;
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},
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handleTouchEnd: function(e) {
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var delta = this._touchStartX - e.changedTouches[0].pageX;
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var SWIPE_SIZE = 150;
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if (delta > SWIPE_SIZE) {
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this.next();
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} else if (delta< -SWIPE_SIZE) {
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this.prev();
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}
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},
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};
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// Initialize
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var slideshow = new SlideShow(query('.slide'));
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document.querySelector('#toggle-counter').addEventListener('click', toggleCounter, false);
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document.querySelector('#toggle-size').addEventListener('click', toggleSize, false);
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document.querySelector('#toggle-transitions').addEventListener('click', toggleTransitions, false);
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document.querySelector('#toggle-gradients').addEventListener('click', toggleGradients, false);
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var counters = document.querySelectorAll('.counter');
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var slides = document.querySelectorAll('.slide');
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function toggleCounter() {
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toArray(counters).forEach(function(el) {
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el.style.display = (el.offsetHeight) ? 'none' : 'block';
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});
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}
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function toggleSize() {
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toArray(slides).forEach(function(el) {
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if (!/reduced/.test(el.className)) {
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addClass(el, 'reduced');
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}
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else {
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removeClass(el, 'reduced');
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}
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});
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}
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function toggleTransitions() {
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toArray(slides).forEach(function(el) {
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if (!/no-transitions/.test(el.className)) {
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addClass(el, 'no-transitions');
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}
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else {
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removeClass(el, 'no-transitions');
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}
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});
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}
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function toggleGradients() {
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toArray(slides).forEach(function(el) {
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if (!/no-gradients/.test(el.className)) {
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addClass(el, 'no-gradients');
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}
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else {
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removeClass(el, 'no-gradients');
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}
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});
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}
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})();
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