(() => {
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const doc = document;
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const disableBuilds = true;
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let ctr = 0;
|
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const 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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const query = function (query, root) {
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if (!query) { return []; }
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if (typeof query !== 'string') { return [...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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const rootIsDoc = (root.nodeType === 9);
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const doc = rootIsDoc ? root : (root.ownerDocument || document);
|
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// rewrite the query to be ID rooted
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if (!rootIsDoc || ('>~+'.includes(query[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 ('>~+'.includes(query.slice(-1))) { query += ' *'; }
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return [...doc.querySelectorAll(query)];
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};
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const ua = navigator.userAgent;
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const isFF = parseFloat(ua.split('Firefox/')[1]) || undefined;
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const isWK = parseFloat(ua.split('WebKit/')[1]) || undefined;
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const isOpera = parseFloat(ua.split('Opera/')[1]) || undefined;
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const canTransition = (function () {
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const 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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const 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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const 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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this._node.classList.add('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 (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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this._node.classList.remove(...this._states);
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this._node.classList.add(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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const _t = this;
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setTimeout(function () { _t._runAutos(); }, 400);
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},
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_makeCounter () {
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if (!this._count || !this._node) { return; }
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const 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.append(c);
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},
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_makeBuildList () {
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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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el.classList.add('to-build');
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});
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},
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_runAutos () {
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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
|
let 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;
|
return true;
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}
|
return false;
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});
|
if (idx >= 0) {
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const elem = this._buildList.splice(idx, 1)[0];
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const transitionEnd = isWK ? 'webkitTransitionEnd' : (isFF ? 'mozTransitionEnd' : 'oTransitionEnd');
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const _t = this;
|
if (canTransition()) {
|
const l = function (evt) {
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elem.parentNode.removeEventListener(transitionEnd, l);
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_t._runAutos();
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};
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elem.parentNode.addEventListener(transitionEnd, l);
|
elem.classList.remove('to-build');
|
} else {
|
setTimeout(function () {
|
elem.classList.remove('to-build');
|
_t._runAutos();
|
}, 400);
|
}
|
}
|
},
|
buildNext () {
|
if (!this._buildList.length) {
|
return false;
|
}
|
this._buildList.shift().classList.remove('to-build');
|
return true;
|
}
|
};
|
|
//
|
// SlideShow class
|
//
|
const SlideShow = function (slides) {
|
this._slides = (slides || []).map(function (el, idx) {
|
return new Slide(el, idx);
|
});
|
|
const h = window.location.hash;
|
try {
|
this.current = parseInt(h.split('#slide')[1], 10);
|
} catch (e) { /* squeltch */ }
|
this.current = isNaN(this.current) ? 1 : this.current;
|
const _t = this;
|
doc.addEventListener('keydown',
|
function (e) { _t.handleKeys(e); });
|
doc.addEventListener('mousewheel',
|
function (e) { _t.handleWheel(e); });
|
doc.addEventListener('DOMMouseScroll',
|
function (e) { _t.handleWheel(e); });
|
doc.addEventListener('touchstart',
|
function (e) { _t.handleTouchStart(e); });
|
doc.addEventListener('touchend',
|
function (e) { _t.handleTouchEnd(e); });
|
window.addEventListener('popstate',
|
function (e) { _t.go(e.state); });
|
this._update();
|
};
|
|
SlideShow.prototype = {
|
_slides: [],
|
_update (dontPush) {
|
document.querySelector('#presentation-counter').innerText = this.current;
|
if (history.pushState) {
|
if (!dontPush) {
|
history.pushState(this.current, 'Slide ' + this.current, '#slide' + this.current);
|
}
|
} else {
|
window.location.hash = 'slide' + this.current;
|
}
|
for (let x = this.current - 1; x < this.current + 7; x++) {
|
if (this._slides[x - 4]) {
|
this._slides[x - 4].setState(Math.max(0, x - this.current));
|
}
|
}
|
},
|
|
current: 0,
|
next () {
|
if (!this._slides[this.current - 1].buildNext()) {
|
this.current = Math.min(this.current + 1, this._slides.length);
|
this._update();
|
}
|
},
|
prev () {
|
this.current = Math.max(this.current - 1, 1);
|
this._update();
|
},
|
go (num) {
|
if (history.pushState && this.current !== num) {
|
history.replaceState(this.current, 'Slide ' + this.current, '#slide' + this.current);
|
}
|
this.current = num;
|
this._update(true);
|
},
|
|
_notesOn: false,
|
showNotes () {
|
const notesOn = this._notesOn = !this._notesOn;
|
query('.notes').forEach(function (el) {
|
el.style.display = (notesOn) ? 'block' : 'none';
|
});
|
},
|
switch3D () {
|
document.body.classList.toggle('three-d');
|
},
|
handleWheel (e) {
|
let delta = 0;
|
if (e.wheelDelta) {
|
delta = e.wheelDelta / 120;
|
if (isOpera) {
|
delta = -delta;
|
}
|
} else if (e.detail) {
|
delta = -e.detail / 3;
|
}
|
|
if (delta > 0) {
|
this.prev();
|
return;
|
}
|
if (delta < 0) {
|
this.next();
|
}
|
},
|
handleKeys (e) {
|
if (/^(input|textarea)$/i.test(e.target.nodeName)) return;
|
|
switch (e.keyCode) {
|
case 37: // left arrow
|
this.prev(); break;
|
case 39: // right arrow
|
case 32: // space
|
this.next(); break;
|
case 50: // 2
|
this.showNotes(); break;
|
case 51: // 3
|
this.switch3D(); break;
|
}
|
},
|
_touchStartX: 0,
|
handleTouchStart (e) {
|
this._touchStartX = e.touches[0].pageX;
|
},
|
handleTouchEnd (e) {
|
const delta = this._touchStartX - e.changedTouches[0].pageX;
|
const SWIPE_SIZE = 150;
|
if (delta > SWIPE_SIZE) {
|
this.next();
|
} else if (delta < -SWIPE_SIZE) {
|
this.prev();
|
}
|
}
|
};
|
|
// Initialize
|
/* const slideshow = */ new SlideShow(query('.slide')); // eslint-disable-line no-new
|
|
document.querySelector('#toggle-counter').addEventListener('click', toggleCounter);
|
document.querySelector('#toggle-size').addEventListener('click', toggleSize);
|
document.querySelector('#toggle-transitions').addEventListener('click', toggleTransitions);
|
document.querySelector('#toggle-gradients').addEventListener('click', toggleGradients);
|
|
const counters = document.querySelectorAll('.counter');
|
const slides = document.querySelectorAll('.slide');
|
|
function toggleCounter () {
|
[...counters].forEach(function (el) {
|
el.style.display = (el.offsetHeight) ? 'none' : 'block';
|
});
|
}
|
|
function toggleSize () {
|
[...slides].forEach(function (el) {
|
if (!/reduced/.test(el.className)) {
|
el.classList.add('reduced');
|
} else {
|
el.classList.remove('reduced');
|
}
|
});
|
}
|
|
function toggleTransitions () {
|
[...slides].forEach(function (el) {
|
if (!/no-transitions/.test(el.className)) {
|
el.classList.add('no-transitions');
|
} else {
|
el.classList.remove('no-transitions');
|
}
|
});
|
}
|
|
function toggleGradients () {
|
[...slides].forEach(function (el) {
|
if (!/no-gradients/.test(el.className)) {
|
el.classList.add('no-gradients');
|
} else {
|
el.classList.remove('no-gradients');
|
}
|
});
|
}
|
})();
|
