progress on implementing core functionality

src/impress.ts

@@ -29,6 +29,8 @@
 // as well as loading impress plugins from the ./plugins directory. A fully built impress.js version
 // has all of these files combined into a single file, as to enable a simple include.
 
+// All internal functions are (to be) prefixed with an underscore
+
 ( window as any ).impress = () => {
     let initializedElements = {};
     
@@ -39,13 +41,26 @@
      * @param {Array<String>|undefined}  [pluginsToLoad] An array of plugins to load when initializing impress.
      * Defaults to the built-in plugins.
      * @returns {undefined}
-     */
+    */
-    const init = ( pluginsToLoad?: Array<string> ): undefined => {
+    const init = ( pluginsToLoad?: Array<Function> ): undefined => {
-        let toBeLoadedPlugins: Array<string> = [ '' ];
+        let toBeLoadedPlugins: Array<Function> = [];
         if ( typeof pluginsToLoad !== 'undefined' ) {
-            toBeLoadedPlugins = pluginsToLoad;
+           toBeLoadedPlugins = pluginsToLoad;
         }
-        // TODO: Load plugins
+
+        for ( let plugin in toBeLoadedPlugins ) {
+            try {
+                toBeLoadedPlugins[ plugin ]();
+            } catch ( _e ) {
+                // Maybe somebody thinks they are funny to pass in an array of something but functions...
+                console.warn( 'impress().init() only accepts an array of functions! What you passed in was an array of ' + typeof( toBeLoadedPlugins[ plugin ] ) );
+                return;
+            }
+        }
+        // TODO: Load plugins, check if impress is supported
+
+        // Finally, with init done, send out the 'impress:init' event
+        document.dispatchEvent( new Event( 'impress:init' ) );
     };
 
     /**
@@ -81,6 +96,10 @@
             id: DOMElementID,
         }
         _positionElements();
+
+        // Dispatch event that an element was added
+        document.dispatchEvent( new Event( 'impress:addedElement' ) );
+
         return true;
     };
 
@@ -97,6 +116,10 @@
             return false;
         }
         _positionElements();
+        
+        // Dispatch event that an element was removed
+        document.dispatchEvent( new Event( 'impress:removedElement' ) );
+
         return true;
     };
 
@@ -105,7 +128,8 @@
      * @returns {undefined}
      */
     const _positionElements = (): undefined => {
-
+        // Gets current position and calls moveTo function
+        moveTo( getCurrentPos().coordinates, getCurrentPos().rotation );
     }
 
     /**
@@ -122,7 +146,8 @@
      */
     const moveTo = ( coordinates: object, rotation: object ): Promise<boolean> => {
         return new Promise( ( resolve, reject ) => {
-            
+            // Dispatch event telling all plugins that we're moving
+            document.dispatchEvent( new Event( 'impress:moving' ) );
         } );
     }
 
@@ -146,10 +171,12 @@
      * Returns the current position as an object of form { coordinates: Object, rotation: Object }
      * @returns {Object}
      */
-    const getCurrentPos = (): Object => {
+    const getCurrentPos = (): { coordinates: { x: number; y: number; z: number; }, rotation: { x: number; y: number; z: number; } } => {
-        return {};
+        return { coordinates: { x: 0, y: 0, z: 0, }, rotation: { x: 0, y: 0, z: 0, } };
     }
 
+
+    // Return all functions that are exposed by impress
     return {
         init,
         getElements,

src/index.html

@@ -22,7 +22,7 @@
             </div>
         </div>
 
-        <script src="./impress.js"/>
+        <script src="/built/impress.js"/>
         <script>impress().init()</script>
     </body>
 </html>

src/lib/util.ts

@@ -0,0 +1,21 @@
+/* ! Licensed under MIT License - https://github.com/impress/impress.js/blob/master/LICENSE */
+/**
+ * impress.js
+ *
+ * impress.js is a presentation tool based on the power of CSS3 transforms and transitions
+ * in modern browsers and inspired by the idea behind prezi.com.
+ *
+ *
+ * Copyright 2011-2012 Bartek Szopka (@bartaz), 2016-2024 Henrik Ingo (@henrikingo), 2024 Janis Hutz
+ * and 70+ other contributors
+ *
+ * Released under the MIT License.
+ *
+ * ------------------------------------------------
+ *  authors:  Bartek Szopka, Henrik Ingo, Janis Hutz
+ *  version: 3.0.0
+ *  url:     http://impress.js.org
+ *  source:  http://github.com/impress/impress.js/
+ */
+
+// Welcome to the util.ts file. This file exposes various functions for use in calculating with vectors