some more restructuring

src/lib/util.js

@@ -1,131 +0,0 @@
-/**
- * Common utility functions
- *
- * Copyright 2011-2012 Bartek Szopka (@bartaz)
- * Henrik Ingo (c) 2016
- * MIT License
- */
-
-( function( document, window ) {
-    "use strict";
-    var roots = [];
-
-    var libraryFactory = function( rootId ) {
-        if ( roots[ rootId ] ) {
-            return roots[ rootId ];
-        }
-
-        // `$` returns first element for given CSS `selector` in the `context` of
-        // the given element or whole document.
-        var $ = function( selector, context ) {
-            context = context || document;
-            return context.querySelector( selector );
-        };
-
-        // `$$` return an array of elements for given CSS `selector` in the `context` of
-        // the given element or whole document.
-        var $$ = function( selector, context ) {
-            context = context || document;
-            return arrayify( context.querySelectorAll( selector ) );
-        };
-
-        // `arrayify` takes an array-like object and turns it into real Array
-        // to make all the Array.prototype goodness available.
-        var arrayify = function( a ) {
-            return [].slice.call( a );
-        };
-
-        // `byId` returns element with given `id` - you probably have guessed that ;)
-        var byId = function( id ) {
-            return document.getElementById( id );
-        };
-
-        // `getElementFromHash` returns an element located by id from hash part of
-        // window location.
-        var getElementFromHash = function() {
-
-            // Get id from url # by removing `#` or `#/` from the beginning,
-            // so both "fallback" `#slide-id` and "enhanced" `#/slide-id` will work
-            var encoded = window.location.hash.replace( /^#\/?/, "" );
-            return byId( decodeURIComponent( encoded ) );
-        };
-
-        // `getUrlParamValue` return a given URL parameter value if it exists
-        // `undefined` if it doesn't exist
-        var getUrlParamValue = function( parameter ) {
-            var chunk = window.location.search.split( parameter + "=" )[ 1 ];
-            var value = chunk && chunk.split( "&" )[ 0 ];
-
-            if ( value !== "" ) {
-                return value;
-            }
-        };
-
-        // Throttling function calls, by Remy Sharp
-        // http://remysharp.com/2010/07/21/throttling-function-calls/
-        var throttle = function( fn, delay ) {
-            var timer = null;
-            return function() {
-                var context = this, args = arguments;
-                window.clearTimeout( timer );
-                timer = window.setTimeout( function() {
-                    fn.apply( context, args );
-                }, delay );
-            };
-        };
-
-        // `toNumber` takes a value given as `numeric` parameter and tries to turn
-        // it into a number. If it is not possible it returns 0 (or other value
-        // given as `fallback`).
-        var toNumber = function( numeric, fallback ) {
-            return isNaN( numeric ) ? ( fallback || 0 ) : Number( numeric );
-        };
-
-        /**
-         * Extends toNumber() to correctly compute also relative-to-screen-size values 5w and 5h.
-         *
-         * Returns the computed value in pixels with w/h postfix removed.
-         */
-        var toNumberAdvanced = function( numeric, fallback ) {
-            if ( typeof numeric !== "string" ) {
-                return toNumber( numeric, fallback );
-            }
-            var ratio = numeric.match( /^([+-]*[\d\.]+)([wh])$/ );
-            if ( ratio == null ) {
-                return toNumber( numeric, fallback );
-            } else {
-                var value = parseFloat( ratio[ 1 ] );
-                var config = window.impress.getConfig();
-                var multiplier = ratio[ 2 ] === "w" ? config.width : config.height;
-                return value * multiplier;
-            }
-        };
-
-        // `triggerEvent` builds a custom DOM event with given `eventName` and `detail` data
-        // and triggers it on element given as `el`.
-        var triggerEvent = function( el, eventName, detail ) {
-            var event = document.createEvent( "CustomEvent" );
-            event.initCustomEvent( eventName, true, true, detail );
-            el.dispatchEvent( event );
-        };
-
-        var lib = {
-            $: $,
-            $$: $$,
-            arrayify: arrayify,
-            byId: byId,
-            getElementFromHash: getElementFromHash,
-            throttle: throttle,
-            toNumber: toNumber,
-            toNumberAdvanced: toNumberAdvanced,
-            triggerEvent: triggerEvent,
-            getUrlParamValue: getUrlParamValue
-        };
-        roots[ rootId ] = lib;
-        return lib;
-    };
-
-    // Let impress core know about the existence of this library
-    window.impress.addLibraryFactory( { util: libraryFactory } );
-
-} )( document, window );