package openfl.display { import openfl.events.UncaughtErrorEvents; import openfl.net.URLRequest; import openfl.system.LoaderContext; import openfl.utils.ByteArray; /** * @externs * The Loader class is used to load SWF files or image (JPG, PNG, or GIF) * files. Use the `load()` method to initiate loading. The loaded * display object is added as a child of the Loader object. * * Use the URLLoader class to load text or binary data. * * The Loader class overrides the following methods that it inherits, * because a Loader object can only have one child display object - the * display object that it loads. Calling the following methods throws an * exception: `addChild()`, `addChildAt()`, * `removeChild()`, `removeChildAt()`, and * `setChildIndex()`. To remove a loaded display object, you must * remove the _Loader_ object from its parent DisplayObjectContainer * child array. * * **Note:** The ActionScript 2.0 MovieClipLoader and LoadVars classes * are not used in ActionScript 3.0. The Loader and URLLoader classes replace * them. * * When you use the Loader class, consider the Flash Player and Adobe AIR * security model: * * * You can load content from any accessible source. * * Loading is not allowed if the calling SWF file is in a network * sandbox and the file to be loaded is local. * * If the loaded content is a SWF file written with ActionScript 3.0, it * cannot be cross-scripted by a SWF file in another security sandbox unless * that cross-scripting arrangement was approved through a call to the * `System.allowDomain()` or the * `System.allowInsecureDomain()` method in the loaded content * file. * * If the loaded content is an AVM1 SWF file(written using ActionScript * 1.0 or 2.0), it cannot be cross-scripted by an AVM2 SWF file(written using * ActionScript 3.0). However, you can communicate between the two SWF files * by using the LocalConnection class. * * If the loaded content is an image, its data cannot be accessed by a * SWF file outside of the security sandbox, unless the domain of that SWF * file was included in a URL policy file at the origin domain of the * image. * * Movie clips in the local-with-file-system sandbox cannot script movie * clips in the local-with-networking sandbox, and the reverse is also * prevented. * * You cannot connect to commonly reserved ports. For a complete list of * blocked ports, see "Restricting Networking APIs" in the _ActionScript 3.0 * Developer's Guide_. * * However, in AIR, content in the `application` security * sandbox(content installed with the AIR application) are not restricted by * these security limitations. * * For more information related to security, see the Flash Player Developer * Center Topic: [Security](http://www.adobe.com/go/devnet_security_en). * * When loading a SWF file from an untrusted source(such as a domain other * than that of the Loader object's root SWF file), you may want to define a * mask for the Loader object, to prevent the loaded content(which is a child * of the Loader object) from drawing to portions of the Stage outside of that * mask, as shown in the following code: */ public class Loader extends DisplayObjectContainer { /** * Contains the root display object of the SWF file or image(JPG, PNG, or * GIF) file that was loaded by using the `load()` or * `loadBytes()` methods. * * @throws SecurityError The loaded SWF file or image file belongs to a * security sandbox to which you do not have access. * For a loaded SWF file, you can avoid this situation * by having the file call the * `Security.allowDomain()` method or by * having the loading file specify a * `loaderContext` parameter with its * `securityDomain` property set to * `SecurityDomain.currentDomain` when you * call the `load()` or * `loadBytes()` method. */ public function get content ():DisplayObject { return null; } /** * Returns a LoaderInfo object corresponding to the object being loaded. * LoaderInfo objects are shared between the Loader object and the loaded * content object. The LoaderInfo object supplies loading progress * information and statistics about the loaded file. * * Events related to the load are dispatched by the LoaderInfo object * referenced by the `contentLoaderInfo` property of the Loader * object. The `contentLoaderInfo` property is set to a valid * LoaderInfo object, even before the content is loaded, so that you can add * event listeners to the object prior to the load. * * To detect uncaught errors that happen in a loaded SWF, use the * `Loader.uncaughtErrorEvents` property, not the * `Loader.contentLoaderInfo.uncaughtErrorEvents` property. */ public function get contentLoaderInfo ():LoaderInfo { return null; } public function get uncaughtErrorEvents ():UncaughtErrorEvents { return null; } /** * Creates a Loader object that you can use to load files, such as SWF, JPEG, * GIF, or PNG files. Call the `load()` method to load the asset * as a child of the Loader instance. You can then add the Loader object to * the display list(for instance, by using the `addChild()` * method of a DisplayObjectContainer instance). The asset appears on the * Stage as it loads. * * You can also use a Loader instance "offlist," that is without adding it * to a display object container on the display list. In this mode, the * Loader instance might be used to load a SWF file that contains additional * modules of an application. * * To detect when the SWF file is finished loading, you can use the events * of the LoaderInfo object associated with the * `contentLoaderInfo` property of the Loader object. At that * point, the code in the module SWF file can be executed to initialize and * start the module. In the offlist mode, a Loader instance might also be * used to load a SWF file that contains components or media assets. Again, * you can use the LoaderInfo object event notifications to detect when the * components are finished loading. At that point, the application can start * using the components and media assets in the library of the SWF file by * instantiating the ActionScript 3.0 classes that represent those components * and assets. * * To determine the status of a Loader object, monitor the following * events that the LoaderInfo object associated with the * `contentLoaderInfo` property of the Loader object: * * * * The `open` event is dispatched when loading begins. * * The `ioError` or `securityError` event is * dispatched if the file cannot be loaded or if an error occured during the * load process. * * The `progress` event fires continuously while the file is * being loaded. * * The `complete` event is dispatched when a file completes * downloading, but before the loaded movie clip's methods and properties are * available. * * The `init` event is dispatched after the properties and * methods of the loaded SWF file are accessible, so you can begin * manipulating the loaded SWF file. This event is dispatched before the * `complete` handler. In streaming SWF files, the * `init` event can occur significantly earlier than the * `complete` event. For most purposes, use the `init` * handler. * */ public function Loader () {} /** * Cancels a `load()` method operation that is currently in * progress for the Loader instance. * */ public function close ():void {} /** * Loads a SWF, JPEG, progressive JPEG, unanimated GIF, or PNG file into an * object that is a child of this Loader object. If you load an animated GIF * file, only the first frame is displayed. As the Loader object can contain * only a single child, issuing a subsequent `load()` request * terminates the previous request, if still pending, and commences a new * load. * * **Note**: In AIR 1.5 and Flash Player 10, the maximum size for a * loaded image is 8,191 pixels in width or height, and the total number of * pixels cannot exceed 16,777,215 pixels.(So, if an loaded image is 8,191 * pixels wide, it can only be 2,048 pixels high.) In Flash Player 9 and * earlier and AIR 1.1 and earlier, the limitation is 2,880 pixels in height * and 2,880 pixels in width. * * A SWF file or image loaded into a Loader object inherits the position, * rotation, and scale properties of the parent display objects of the Loader * object. * * Use the `unload()` method to remove movies or images loaded * with this method, or to cancel a load operation that is in progress. * * You can prevent a SWF file from using this method by setting the * `allowNetworking` parameter of the the `object` and * `embed` tags in the HTML page that contains the SWF * content. * * When you use this method, consider the Flash Player security model, * which is described in the Loader class description. * * In Flash Player 10 and later, if you use a multipart Content-Type(for * example "multipart/form-data") that contains an upload(indicated by a * "filename" parameter in a "content-disposition" header within the POST * body), the POST operation is subject to the security rules applied to * uploads: * * * * The POST operation must be performed in response to a user-initiated * action, such as a mouse click or key press. * * If the POST operation is cross-domain(the POST target is not on the * same server as the SWF file that is sending the POST request), the target * server must provide a URL policy file that permits cross-domain * access. * * * Also, for any multipart Content-Type, the syntax must be valid * (according to the RFC2046 standard). If the syntax appears to be invalid, * the POST operation is subject to the security rules applied to * uploads. * * For more information related to security, see the Flash Player * Developer Center Topic: [Security](http://www.adobe.com/go/devnet_security_en). * * @param request The absolute or relative URL of the SWF, JPEG, GIF, or PNG * file to be loaded. A relative path must be relative to the * main SWF file. Absolute URLs must include the protocol * reference, such as http:// or file:///. Filenames cannot * include disk drive specifications. * @param context A LoaderContext object, which has properties that define * the following: * * * Whether or not to check for the existence of a policy * file upon loading the object * * The ApplicationDomain for the loaded object * * The SecurityDomain for the loaded object * * The ImageDecodingPolicy for the loaded image * object * * If the `context` parameter is not specified * or refers to a null object, the loaded content remains in * its own security domain. * * For complete details, see the description of the * properties in the [LoaderContext](../system/LoaderContext.html) * class. * @throws IOError The `digest` property of the * `request` object is not * `null`. You should only set the * `digest` property of a URLRequest * object when calling the * `URLLoader.load()` method when * loading a SWZ file(an Adobe platform * component). * @throws IllegalOperationError If the `requestedContentParent` * property of the `context` * parameter is a `Loader`. * @throws IllegalOperationError If the `LoaderContext.parameters` * parameter is set to non-null and has some * values which are not Strings. * @throws SecurityError The value of * `LoaderContext.securityDomain` * must be either `null` or * `SecurityDomain.currentDomain`. * This reflects the fact that you can only * place the loaded media in its natural * security sandbox or your own(the latter * requires a policy file). * @throws SecurityError Local SWF files may not set * LoaderContext.securityDomain to anything * other than `null`. It is not * permitted to import non-local media into a * local sandbox, or to place other local media * in anything other than its natural sandbox. * @throws SecurityError You cannot connect to commonly reserved * ports. For a complete list of blocked ports, * see "Restricting Networking APIs" in the * _ActionScript 3.0 Developer's Guide_. * @throws SecurityError If the `applicationDomain` or * `securityDomain` properties of * the `context` parameter are from * a disallowed domain. * @throws SecurityError If a local SWF file is attempting to use the * `securityDomain` property of the * `context` parameter. * @event asyncError Dispatched by the `contentLoaderInfo` * object if the * `LoaderContext.requestedContentParent` * property has been specified and it is not possible to * add the loaded content as a child to the specified * DisplayObjectContainer. This could happen if the * loaded content is a * `openfl.display.AVM1Movie` or if the * `addChild()` call to the * requestedContentParent throws an error. * @event complete Dispatched by the `contentLoaderInfo` * object when the file has completed loading. The * `complete` event is always dispatched * after the `init` event. * @event httpStatus Dispatched by the `contentLoaderInfo` * object when a network request is made over HTTP and * Flash Player can detect the HTTP status code. * @event init Dispatched by the `contentLoaderInfo` * object when the properties and methods of the loaded * SWF file are accessible. The `init` event * always precedes the `complete` event. * @event ioError Dispatched by the `contentLoaderInfo` * object when an input or output error occurs that * causes a load operation to fail. * @event open Dispatched by the `contentLoaderInfo` * object when the loading operation starts. * @event progress Dispatched by the `contentLoaderInfo` * object as data is received while load operation * progresses. * @event securityError Dispatched by the `contentLoaderInfo` * object if a SWF file in the local-with-filesystem * sandbox attempts to load content in the * local-with-networking sandbox, or vice versa. * @event securityError Dispatched by the `contentLoaderInfo` * object if the * `LoaderContext.requestedContentParent` * property has been specified and the security sandbox * of the * `LoaderContext.requestedContentParent` * does not have access to the loaded SWF. * @event unload Dispatched by the `contentLoaderInfo` * object when a loaded object is removed. */ public function load (request:URLRequest, context:LoaderContext = null):void {} /** * Loads from binary data stored in a ByteArray object. * * The `loadBytes()` method is asynchronous. You must wait for * the "init" event before accessing the properties of a loaded object. * * When you use this method, consider the Flash Player security model, * which is described in the Loader class description. * * @param bytes A ByteArray object. The contents of the ByteArray can be * any of the file formats supported by the Loader class: SWF, * GIF, JPEG, or PNG. * @param context A LoaderContext object. Only the * `applicationDomain` property of the * LoaderContext object applies; the * `checkPolicyFile` and * `securityDomain` properties of the LoaderContext * object do not apply. * * If the `context` parameter is not specified * or refers to a null object, the content is loaded into the * current security domain - a process referred to as "import * loading" in Flash Player security documentation. * Specifically, if the loading SWF file trusts the remote SWF * by incorporating the remote SWF into its code, then the * loading SWF can import it directly into its own security * domain. * * For more information related to security, see the Flash * Player Developer Center Topic: [Security](http://www.adobe.com/go/devnet_security_en). * @throws ArgumentError If the `length` property of the * ByteArray object is not greater than 0. * @throws IllegalOperationError If the `checkPolicyFile` or * `securityDomain` property of the * `context` parameter are non-null. * @throws IllegalOperationError If the `requestedContentParent` * property of the `context` * parameter is a `Loader`. * @throws IllegalOperationError If the `LoaderContext.parameters` * parameter is set to non-null and has some * values which are not Strings. * @throws SecurityError If the provided * `applicationDomain` property of * the `context` property is from a * disallowed domain. * @throws SecurityError You cannot connect to commonly reserved * ports. For a complete list of blocked ports, * see "Restricting Networking APIs" in the * _ActionScript 3.0 Developer's Guide_. * @event asyncError Dispatched by the `contentLoaderInfo` * object if the * `LoaderContext.requestedContentParent` * property has been specified and it is not possible to * add the loaded content as a child to the specified * DisplayObjectContainer. This could happen if the * loaded content is a * `openfl.display.AVM1Movie` or if the * `addChild()` call to the * requestedContentParent throws an error. * @event complete Dispatched by the `contentLoaderInfo` * object when the operation is complete. The * `complete` event is always dispatched * after the `init` event. * @event init Dispatched by the `contentLoaderInfo` * object when the properties and methods of the loaded * data are accessible. The `init` event * always precedes the `complete` event. * @event ioError Dispatched by the `contentLoaderInfo` * object when the runtime cannot parse the data in the * byte array. * @event open Dispatched by the `contentLoaderInfo` * object when the operation starts. * @event progress Dispatched by the `contentLoaderInfo` * object as data is transfered in memory. * @event securityError Dispatched by the `contentLoaderInfo` * object if the * `LoaderContext.requestedContentParent` * property has been specified and the security sandbox * of the * `LoaderContext.requestedContentParent` * does not have access to the loaded SWF. * @event unload Dispatched by the `contentLoaderInfo` * object when a loaded object is removed. */ public function loadBytes (buffer:ByteArray, context:LoaderContext = null):void {} /** * Removes a child of this Loader object that was loaded by using the * `load()` method. The `property` of the associated * LoaderInfo object is reset to `null`. The child is not * necessarily destroyed because other objects might have references to it; * however, it is no longer a child of the Loader object. * * As a best practice, before you unload a child SWF file, you should * explicitly close any streams in the child SWF file's objects, such as * LocalConnection, NetConnection, NetStream, and Sound objects. Otherwise, * audio in the child SWF file might continue to play, even though the child * SWF file was unloaded. To close streams in the child SWF file, add an * event listener to the child that listens for the `unload` * event. When the parent calls `Loader.unload()`, the * `unload` event is dispatched to the child. The following code * shows how you might do this: * * ``` * function closeAllStreams(evt:Event) { * myNetStream.close(); * mySound.close(); * myNetConnection.close(); * myLocalConnection.close(); * } * myMovieClip.loaderInfo.addEventListener(Event.UNLOAD, * closeAllStreams); * ``` */ public function unload ():void {} /** * Attempts to unload child SWF file contents and stops the execution of * commands from loaded SWF files. This method attempts to unload SWF files * that were loaded using `Loader.load()` or * `Loader.loadBytes()` by removing references to EventDispatcher, * NetConnection, Timer, Sound, or Video objects of the child SWF file. As a * result, the following occurs for the child SWF file and the child SWF * file's display list: * * * Sounds are stopped. * * Stage event listeners are removed. * * Event listeners for `enterFrame`, * `frameConstructed`, `exitFrame`, * `activate` and `deactivate` are removed. * * Timers are stopped. * * Camera and Microphone instances are detached * * Movie clips are stopped. * * * @param gc Provides a hint to the garbage collector to run on the child SWF * objects(`true`) or not(`false`). If you * are unloading many objects asynchronously, setting the * `gc` paramter to `false` might improve * application performance. However, if the parameter is set to * `false`, media and display objects of the child SWF * file might persist in memory after running the * `unloadAndStop()` command. */ public function unloadAndStop (gc:Boolean = true):void {} } }