61 lines
1.3 KiB
JavaScript
Executable File
61 lines
1.3 KiB
JavaScript
Executable File
var url = document.location,
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domSlides = document.querySelectorAll('section.slide'),
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slides = [], backhash = {},
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linkScreen = document.querySelector('link[title=screen]'),
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linkProjection = document.querySelector('link[title=projection]'),
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fullscreen = false;
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for(var i = 0, len = domSlides.length; i < len; i++) {
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var id = domSlides[i].id;
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slides[i] = '#' + id;
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backhash['#' + id] = i;
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}
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function enterFull() {
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fullscreen = true;
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updateView();
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}
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function exitFull(e) {
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if(e.which == 27) {
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fullscreen = false;
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updateView();
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}
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}
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function turnSlide(e) {
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if(!fullscreen) return;
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var current = backhash[url.hash],
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target,
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command;
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switch(e.which) {
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case 33 : // PgUp
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case 38 : // Up
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case 37 : // Left
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current--;
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break;
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case 34 : // PgDown
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case 40 : // Down
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case 39 : // Right
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current++;
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break;
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case 32 : // Space
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current += e.shiftKey ? -1 : 1;
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break;
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default:
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return;
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}
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target = slides[current];
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e.preventDefault();
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if(target) url.hash = target;
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}
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function updateView() {
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linkScreen.disabled = fullscreen;
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linkProjection.disabled = !fullscreen;
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if(fullscreen && !backhash[url.hash]) url.hash = slides[0];
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}
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document.addEventListener('keyup', turnSlide, false);
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domSlides[0].addEventListener('click', enterFull, false);
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document.addEventListener('keyup', exitFull, false); |