Touching DOM as less as possible
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@ -1,49 +1,57 @@
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$(function() {
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$(function() {
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var slides = $( 'section.slide' );
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var domSlides = $( 'section.slide' ),
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location = document.location,
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slides = [],
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backhash = {},
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linkScreen = $( 'link[title=screen]' ),
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linkProjection = $( 'link[title=projection]' );
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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 fullScreen() {
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function fullScreen() {
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return (
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return window.screenX == 0 &&
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window.screenX == 0 &&
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window.screenY == 0 &&
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window.screenY == 0 &&
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screen.width == window.outerWidth &&
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screen.width == window.outerWidth &&
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screen.height == window.outerHeight
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screen.height == window.outerHeight;
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) ? true : false;
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}
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}
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function turnSlide( e ) {
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function turnSlide( e ) {
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if( !fullScreen() ) return;
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if( !fullScreen() ) return;
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var current = $( document.location.hash );
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var current = backhash[location.hash],
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target,
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command;
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switch ( e.which ) {
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switch ( e.which ) {
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case 33 : // PgUp
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case 33 : // PgUp
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case 38 : // Up
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case 38 : // Up
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case 37 : // Left
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case 37 : // Left
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var target = current.prev( slides );
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current--;
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break;
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break;
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case 34 : // PgDown
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case 34 : // PgDown
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case 40 : // Down
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case 40 : // Down
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case 39 : // Right
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case 39 : // Right
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var target = current.next( slides );
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current++;
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break;
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break;
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case 32 : // Space
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case 32 : // Space
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var target = current[ e.shiftKey ? 'prev' : 'next' ]( slides );
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current += e.shiftKey ? -1 : 1;
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break;
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break;
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default:
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default:
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return;
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return;
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}
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}
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target = slides[current];
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e.preventDefault();
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e.preventDefault();
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if( !target.length ) return;
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if( target ) location.hash = target;
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else document.location.hash = '#' + target.attr( 'id' );
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}
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}
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function updateView() {
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function updateView() {
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var screen = $( 'link[title=screen]' ),
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var fullscreen = fullScreen();
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projection = $( 'link[title=projection]' ),
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linkScreen.attr( 'disabled', fullscreen );
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fullscreen = fullScreen();
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linkProjection.attr( 'disabled', !fullscreen );
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screen.attr( 'disabled', fullscreen );
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if( fullscreen && !backhash[location.hash]) location.hash = slides[0];
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projection.attr( 'disabled', !fullscreen );
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if( !fullscreen || $( document.location.hash ).length ) return;
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else document.location.hash = '#' + slides.first().attr( 'id' );
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}
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}
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$( document ).
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$( document ).
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