gecko-dev/accessible/public/nsIAccessNode.idl

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Original Author: Aaron Leventhal (aaronl@netscape.com)
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsISupports.idl"
interface nsIDOMNode;
interface nsIAccessibleDocument;
interface nsIDOMCSSPrimitiveValue;
/**
* An interface used by in-process accessibility clients
* to get style, window, markup and other information about
* a DOM node. When accessibility is active in Gecko,
* every DOM node can have one nsIAccessNode for each
* pres shell the DOM node is rendered in.
* The nsIAccessNode implementations are instantiated lazily.
* The nsIAccessNode tree for a given dom window
* has a one to one relationship to the DOM tree.
* If the DOM node for this access node is "accessible",
* then a QueryInterface to nsIAccessible will succeed.
*
* @status UNDER_REVIEW
*/
[scriptable, uuid(71a3b4e7-e83d-45cf-a20e-9ce292bcf19f)]
interface nsIAccessNode : nsISupports
{
/**
* The DOM node this nsIAccessNode is associated with.
*/
readonly attribute nsIDOMNode DOMNode;
/**
* The number of DOM children for the DOM node, which
* matches the number of nsIAccessNode children for this
* nsIAccessNode.
*/
readonly attribute long numChildren;
/**
* Get the nth child of this node
* @param childNum Zero-based child index
* @return The nth nsIAccessNode child
*/
nsIAccessNode getChildNodeAt(in long childNum);
/**
* The parent nsIAccessNode
*/
readonly attribute nsIAccessNode parentNode;
/**
* The first nsIAccessNode child
*/
readonly attribute nsIAccessNode firstChildNode;
/**
* The last nsIAccessNode child
*/
readonly attribute nsIAccessNode lastChildNode;
/**
* The previous nsIAccessNode sibling
*/
readonly attribute nsIAccessNode previousSiblingNode;
/**
* The next nsIAccessNode sibling
*/
readonly attribute nsIAccessNode nextSiblingNode;
/**
* The nsIAccessibleDocument that this nsIAccessNode
* resides in.
*/
readonly attribute nsIAccessibleDocument accessibleDocument;
/**
* The innerHTML for the DOM node
* This is a text string of all the markup inside the DOM
* node, not including the start and end tag for the node.
*/
readonly attribute DOMString innerHTML;
/**
* Makes an object visible on screen.
*
* @param scrollType - defines where the object should be placed on
* the screen (see nsIAccessibleScrollType for
* available constants).
*/
void scrollTo(in unsigned long aScrollType);
/**
* Moves the top left of an object to a specified location.
*
* @param coordinateType - specifies whether the coordinates are relative to
* the screen or the parent object (for available
* constants refer to nsIAccessibleCoordinateType)
* @param aX - defines the x coordinate
* @param aY - defines the y coordinate
*/
void scrollToPoint(in unsigned long aCoordinateType, in long aX, in long aY);
/**
* The OS window handle for the window this node
* is being displayed in.
*/
[noscript] readonly attribute voidPtr ownerWindow;
/**
* A unique ID calculated for this DOM node, for the
* purposes of caching and referencing this object.
*/
[noscript] readonly attribute voidPtr uniqueID;
/**
* Retrieve the computed style value for this DOM node, if it is a DOM element.
* Note: the meanings of width, height and other size measurements depend
* on the version of CSS being used. Therefore, for bounds information,
* it is better to use nsIAccessible::accGetBounds.
* @param pseudoElt The pseudo element to retrieve style for, or NULL
* for general computed style information for this node.
* @param propertyName Retrieve the computed style value for this property name,
* for example "border-bottom".
*/
DOMString getComputedStyleValue(in DOMString pseudoElt, in DOMString propertyName);
/**
* The method is similar to getComputedStyleValue() excepting that this one
* returns nsIDOMCSSPrimitiveValue.
*/
nsIDOMCSSPrimitiveValue getComputedStyleCSSValue(in DOMString pseudoElt,
in DOMString propertyName);
/**
* The language for the current DOM node, e.g. en, de, etc.
*/
readonly attribute DOMString language;
};