339 lines
8.6 KiB
JavaScript
339 lines
8.6 KiB
JavaScript
(() => {
|
|
const doc = document;
|
|
const disableBuilds = true;
|
|
|
|
let ctr = 0;
|
|
|
|
const byId = function (id) {
|
|
if (typeof id === 'string') { return doc.getElementById(id); }
|
|
return id;
|
|
};
|
|
|
|
const query = function (qry, root) {
|
|
if (!qry) { return []; }
|
|
if (typeof qry !== 'string') { return [...qry]; }
|
|
if (typeof root === 'string') {
|
|
root = byId(root);
|
|
if (!root) { return []; }
|
|
}
|
|
|
|
root = root || document;
|
|
const rootIsDoc = (root.nodeType === 9);
|
|
const dcmnt = rootIsDoc ? root : (root.ownerDocument || document);
|
|
|
|
// rewrite the query to be ID rooted
|
|
if (!rootIsDoc || ('>~+'.includes(qry[0]))) {
|
|
root.id = root.id || ('qUnique' + (ctr++));
|
|
qry = '#' + root.id + ' ' + qry;
|
|
}
|
|
// don't choke on something like ".yada.yada >"
|
|
if ('>~+'.includes(qry.slice(-1))) { qry += ' *'; }
|
|
|
|
return [...dcmnt.querySelectorAll(qry)];
|
|
};
|
|
|
|
const ua = navigator.userAgent;
|
|
const isFF = parseFloat(ua.split('Firefox/')[1]) || undefined;
|
|
const isWK = parseFloat(ua.split('WebKit/')[1]) || undefined;
|
|
const isOpera = parseFloat(ua.split('Opera/')[1]) || undefined;
|
|
|
|
const canTransition = (function () {
|
|
const ver = parseFloat(ua.split('Version/')[1]) || undefined;
|
|
// test to determine if this browser can handle CSS transitions.
|
|
const cachedCanTransition =
|
|
(isWK || (isFF && isFF > 3.6) || (isOpera && ver >= 10.5));
|
|
return function () { return cachedCanTransition; };
|
|
})();
|
|
|
|
//
|
|
// Slide class
|
|
//
|
|
const Slide = function (node, idx) {
|
|
this._node = node;
|
|
if (idx >= 0) {
|
|
this._count = idx + 1;
|
|
}
|
|
if (this._node) {
|
|
this._node.classList.add('slide', 'distant-slide');
|
|
}
|
|
this._makeCounter();
|
|
this._makeBuildList();
|
|
};
|
|
|
|
Slide.prototype = {
|
|
_node: null,
|
|
_count: 0,
|
|
_buildList: [],
|
|
_visited: false,
|
|
_currentState: '',
|
|
_states: [
|
|
'distant-slide', 'far-past',
|
|
'past', 'current', 'future',
|
|
'far-future', 'distant-slide'
|
|
],
|
|
setState (state) {
|
|
if (typeof state !== 'string') {
|
|
state = this._states[state];
|
|
}
|
|
if (state === 'current' && !this._visited) {
|
|
this._visited = true;
|
|
this._makeBuildList();
|
|
}
|
|
this._node.classList.remove(...this._states);
|
|
this._node.classList.add(state);
|
|
this._currentState = state;
|
|
|
|
// delay first auto run. Really wish this were in CSS.
|
|
/*
|
|
this._runAutos();
|
|
*/
|
|
const that = this;
|
|
setTimeout(function () { that._runAutos(); }, 400);
|
|
},
|
|
_makeCounter () {
|
|
if (!this._count || !this._node) { return; }
|
|
const c = doc.createElement('span');
|
|
c.innerHTML = this._count;
|
|
c.className = 'counter';
|
|
this._node.append(c);
|
|
},
|
|
_makeBuildList () {
|
|
this._buildList = [];
|
|
if (disableBuilds) { return; }
|
|
if (this._node) {
|
|
this._buildList = query('[data-build] > *', this._node);
|
|
}
|
|
this._buildList.forEach(function (el) {
|
|
el.classList.add('to-build');
|
|
});
|
|
},
|
|
_runAutos () {
|
|
if (this._currentState !== 'current') {
|
|
return;
|
|
}
|
|
// find the next auto, slice it out of the list, and run it
|
|
let idx = -1;
|
|
this._buildList.some(function (n, i) {
|
|
if (n.hasAttribute('data-auto')) {
|
|
idx = i;
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
if (idx >= 0) {
|
|
const elem = this._buildList.splice(idx, 1)[0];
|
|
const transitionEnd = isWK ? 'webkitTransitionEnd' : (isFF ? 'mozTransitionEnd' : 'oTransitionEnd');
|
|
const that = this;
|
|
if (canTransition()) {
|
|
const l = function (evt) {
|
|
elem.parentNode.removeEventListener(transitionEnd, l);
|
|
that._runAutos();
|
|
};
|
|
elem.parentNode.addEventListener(transitionEnd, l);
|
|
elem.classList.remove('to-build');
|
|
} else {
|
|
setTimeout(function () {
|
|
elem.classList.remove('to-build');
|
|
that._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]);
|
|
} catch (e) { /* squeltch */ }
|
|
this.current = isNaN(this.current) ? 1 : this.current;
|
|
const that = this;
|
|
doc.addEventListener('keydown',
|
|
function (e) { that.handleKeys(e); });
|
|
doc.addEventListener('mousewheel',
|
|
function (e) { that.handleWheel(e); });
|
|
doc.addEventListener('DOMMouseScroll',
|
|
function (e) { that.handleWheel(e); });
|
|
doc.addEventListener('touchstart',
|
|
function (e) { that.handleTouchStart(e); });
|
|
doc.addEventListener('touchend',
|
|
function (e) { that.handleTouchEnd(e); });
|
|
window.addEventListener('popstate',
|
|
function (e) { that.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');
|
|
|
|
/**
|
|
* Show or hide the counters.
|
|
* @returns {undefined}
|
|
*/
|
|
function toggleCounter () {
|
|
[...counters].forEach(function (el) {
|
|
el.style.display = (el.offsetHeight) ? 'none' : 'block';
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Add or remove `reduced` (size) class.
|
|
* @returns {undefined}
|
|
*/
|
|
function toggleSize () {
|
|
[...slides].forEach(function (el) {
|
|
if (!(/reduced/).test(el.className)) {
|
|
el.classList.add('reduced');
|
|
} else {
|
|
el.classList.remove('reduced');
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Add or remove `no-transitions` class.
|
|
* @returns {undefined}
|
|
*/
|
|
function toggleTransitions () {
|
|
[...slides].forEach(function (el) {
|
|
if (!(/no-transitions/).test(el.className)) {
|
|
el.classList.add('no-transitions');
|
|
} else {
|
|
el.classList.remove('no-transitions');
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Add or remove `no-gradients` class.
|
|
* @returns {undefined}
|
|
*/
|
|
function toggleGradients () {
|
|
[...slides].forEach(function (el) {
|
|
if (!(/no-gradients/).test(el.className)) {
|
|
el.classList.add('no-gradients');
|
|
} else {
|
|
el.classList.remove('no-gradients');
|
|
}
|
|
});
|
|
}
|
|
})();
|