joshua/presentation-blockchains
1
0
Fork 0
mirror of https://github.com/seigler/presentation-blockchains synced 2025-07-27 09:36:10 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

initial commit

Browse source
This commit is contained in:
Joshua Seigler 2016-10-13 16:38:09 -04:00
commit b0a2712b2c
12 changed files with 1146 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

131
scripts/app.js Normal file
View file

@ -0,0 +1,131 @@
(function () {
'use strict';
var slides = [],
currentSlideNumber = 0,
slideNext,
slidePrev,
commandBar,
commandField,
commandBarVisible = true;
function $(selector) {
return document.querySelector(selector);
}
function $$(selector) {
return Array.prototype.slice.call(document.querySelectorAll(selector), 0);
}
function setCurrentSlide(newSlideNumber, storeChange) {
newSlideNumber = Math.max(Math.min(newSlideNumber, slides.length - 1), 0);
if (newSlideNumber !== currentSlideNumber) {
currentSlideNumber = newSlideNumber;
if (storeChange) {
localStorage.setItem('janus-currentSlideNumber', currentSlideNumber);
}
}
slides.forEach(function (item, index, array) {
if (index < currentSlideNumber) {
if (slides[index].contains(slides[currentSlideNumber])) {
item.setAttribute('janus-timeline', 'present');
} else {
item.setAttribute('janus-timeline', 'past');
}
} else if (index === currentSlideNumber) {
item.setAttribute('janus-timeline', 'present');
} else {
item.setAttribute('janus-timeline', 'future');
}
});
}
var sessionListener = function(e) {
if (e.url === window.location.href) {
if (e.key === 'janus-currentSlideNumber') {
setCurrentSlide(+e.newValue, false);
}
}
};
var toggleCommandBar = function(visible) {
if (visible === false) {
commandBar.style.display = 'none';
commandBarVisible = false;
} else if (visible === true) {
commandBar.style.display = 'flex';
commandField.value = '';
commandField.focus();
commandBarVisible = true;
}
}
var commandListener = function(event) {
var typed = String.fromCharCode(event.keyCode).toLowerCase();
if (/[0-9]/.test(typed)) {
return;
} else if (event.keyCode === 13) {
runCommand(commandField.value);
toggleCommandBar(false);
} else if (/[spc]/.test(typed)) {
runCommand(commandField.value + typed);
toggleCommandBar(false);
}
};
var runCommand = function(command) {
var s = command.split();
if (s.length === 1 && /^[0-9]+$/.test(s[0])) {
setCurrentSlide(+s[0], true);
} else if (s.length === 1) {
switch(s[0]) {
case 's':
document.body.classList.toggle('simulate-projection');
break;
case 'p':
document.body.classList.toggle('show-notes');
break;
case 'c':
window.open(window.location.href, '_blank');
break;
}
}
}
var init = function() {
commandField = $('#commandField');
commandField.addEventListener('keydown', commandListener);
commandField.addEventListener('blur', function(event) {
toggleCommandBar(false);
});
commandBar = $('body > nav');
toggleCommandBar(false);
slides = $$('main>section, [janus-timeline]');
currentSlideNumber = 0;
shortcut.add('F1', function() {
document.body.classList.toggle('show-notes');
});
shortcut.add('F2', function() {
window.open(window.location.href, '_blank');
});
shortcut.add('Page_down', function() {
setCurrentSlide(currentSlideNumber + 1, true);
});
shortcut.add('Page_up', function() {
setCurrentSlide(currentSlideNumber - 1, true);
});
shortcut.add('Escape', function() {
toggleCommandBar(!commandBarVisible);
});
var storedSlideNumber;
if (storedSlideNumber = localStorage.getItem('janus-currentSlideNumber')) {
setCurrentSlide(storedSlideNumber, false);
} else {
setCurrentSlide(0);
}
document.body.classList.remove('is-loading');
};
document.addEventListener('DOMContentLoaded', init);
window.addEventListener('storage', sessionListener);
})();