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127 lines
6.3 KiB
Plaintext
127 lines
6.3 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Tom Pixley <joki@netscape.com> (original author)
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* Johnny Stenback <jst@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "domstubs.idl"
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/**
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* The nsIDOMEventTarget interface is the interface implemented by all
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* event targets in the Document Object Model.
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*
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* For more information on this interface please see
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* http://www.w3.org/TR/DOM-Level-2-Events/
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*/
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[scriptable, uuid(1c773b30-d1cf-11d2-bd95-00805f8ae3f4)]
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interface nsIDOMEventTarget : nsISupports
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{
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/**
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* This method allows the registration of event listeners on the event target.
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* If an EventListener is added to an EventTarget while it is processing an
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* event, it will not be triggered by the current actions but may be
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* triggered during a later stage of event flow, such as the bubbling phase.
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*
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* If multiple identical EventListeners are registered on the same
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* EventTarget with the same parameters the duplicate instances are
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* discarded. They do not cause the EventListener to be called twice
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* and since they are discarded they do not need to be removed with the
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* removeEventListener method.
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*
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* @param type The event type for which the user is registering
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* @param listener The listener parameter takes an interface
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* implemented by the user which contains the methods
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* to be called when the event occurs.
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* @param useCapture If true, useCapture indicates that the user
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* wishes to initiate capture. After initiating
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* capture, all events of the specified type will be
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* dispatched to the registered EventListener before
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* being dispatched to any EventTargets beneath them
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* in the tree. Events which are bubbling upward
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* through the tree will not trigger an
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* EventListener designated to use capture.
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*/
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[noscript] void addEventListener(in DOMString type,
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in nsIDOMEventListener listener,
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in boolean useCapture);
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/**
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* This method allows the removal of event listeners from the event
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* target. If an EventListener is removed from an EventTarget while it
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* is processing an event, it will not be triggered by the current actions.
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* EventListeners can never be invoked after being removed.
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* Calling removeEventListener with arguments which do not identify any
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* currently registered EventListener on the EventTarget has no effect.
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*
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* @param type Specifies the event type of the EventListener being
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* removed.
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* @param listener The EventListener parameter indicates the
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* EventListener to be removed.
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* @param useCapture Specifies whether the EventListener being
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* removed was registered as a capturing listener or
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* not. If a listener was registered twice, one with
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* capture and one without, each must be removed
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* separately. Removal of a capturing listener does
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* not affect a non-capturing version of the same
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* listener, and vice versa.
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*/
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void removeEventListener(in DOMString type,
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in nsIDOMEventListener listener,
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[optional] in boolean useCapture);
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/**
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* This method allows the dispatch of events into the implementations
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* event model. Events dispatched in this manner will have the same
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* capturing and bubbling behavior as events dispatched directly by the
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* implementation. The target of the event is the EventTarget on which
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* dispatchEvent is called.
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*
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* @param evt Specifies the event type, behavior, and contextual
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* information to be used in processing the event.
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* @return Indicates whether any of the listeners which handled the
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* event called preventDefault. If preventDefault was called
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* the value is false, else the value is true.
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* @throws UNSPECIFIED_EVENT_TYPE_ERR: Raised if the Event's type was
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* not specified by initializing the event before
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* dispatchEvent was called. Specification of the Event's
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* type as null or an empty string will also trigger this
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* exception.
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*/
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boolean dispatchEvent(in nsIDOMEvent evt)
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raises(DOMException);
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};
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