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352 lines
11 KiB
Plaintext
352 lines
11 KiB
Plaintext
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsISupports.idl"
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#include "nsIArray.idl"
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interface nsIPersistentProperties;
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interface nsIAccessibleDocument;
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interface nsIAccessibleRelation;
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webidl Node;
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%{C++
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#define NS_ACCESSIBLE_CACHE_TOPIC "accessible-cache"
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namespace mozilla {
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namespace a11y {
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class Accessible;
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class LocalAccessible;
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}
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}
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%}
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[ptr] native InternalAccessible(mozilla::a11y::Accessible);
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[ptr] native InternalLocalAccessible(mozilla::a11y::LocalAccessible);
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/**
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* A cross-platform interface that supports platform-specific
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* accessibility APIs like MSAA and ATK. Contains the sum of what's needed
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* to support IAccessible as well as ATK's generic accessibility objects.
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* Can also be used by in-process accessibility clients to get information
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* about objects in the accessible tree. The accessible tree is a subset of
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* nodes in the DOM tree -- such as documents, focusable elements and text.
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* Mozilla creates the implementations of nsIAccessible on demand.
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* See http://www.mozilla.org/projects/ui/accessibility for more information.
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*/
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[scriptable, builtinclass, uuid(de2869d9-563c-4943-996b-31a4daa4d097)]
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interface nsIAccessible : nsISupports
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{
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/**
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* Parent node in accessible tree.
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*/
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readonly attribute nsIAccessible parent;
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/**
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* Next sibling in accessible tree
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*/
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readonly attribute nsIAccessible nextSibling;
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/**
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* Previous sibling in accessible tree
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*/
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readonly attribute nsIAccessible previousSibling;
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/**
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* First child in accessible tree
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*/
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readonly attribute nsIAccessible firstChild;
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/**
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* Last child in accessible tree
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*/
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readonly attribute nsIAccessible lastChild;
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/**
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* Array of all this element's children.
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*/
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readonly attribute nsIArray children;
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/**
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* Number of accessible children
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*/
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readonly attribute long childCount;
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/**
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* The 0-based index of this accessible in its parent's list of children,
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* or -1 if this accessible does not have a parent.
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*/
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readonly attribute long indexInParent;
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/**
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* The unique identifier of the accessible. ID is only guaranteed to be unique
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* per document (Windows IDs are unique even across documents, but that is
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* Windows specific and not exposed to core).
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*/
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readonly attribute long long uniqueID;
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/**
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* The DOM node this nsIAccessible is associated with.
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*/
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readonly attribute Node DOMNode;
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/**
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* For remote accessibles the id of the related DOM node.
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*/
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readonly attribute AString id;
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/**
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* The document accessible that this access node resides in.
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*/
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readonly attribute nsIAccessibleDocument document;
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/**
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* The root document accessible that this access node resides in.
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*/
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readonly attribute nsIAccessibleDocument rootDocument;
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/**
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* The language for the current DOM node, e.g. en, de, etc.
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*/
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readonly attribute AString language;
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/**
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* Accessible name -- the main text equivalent for this node. The name is
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* specified by ARIA or by native markup. Example of ARIA markup is
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* aria-labelledby attribute placed on element of this accessible. Example
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* of native markup is HTML label linked with HTML element of this accessible.
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*
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* Value can be string or null. A null value indicates that AT may attempt to
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* compute the name. Any string value, including the empty string, should be
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* considered author-intentional, and respected.
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*/
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readonly attribute AString name;
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/**
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* Accessible value -- a number or a secondary text equivalent for this node
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* Widgets that use role attribute can force a value using the valuenow attribute
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*/
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readonly attribute AString value;
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/**
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* Accessible description -- long text associated with this node
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*/
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readonly attribute AString description;
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/**
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* Provides localized string of accesskey name, such as Alt+D.
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* The modifier may be affected by user and platform preferences.
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* Usually alt+letter, or just the letter alone for menu items.
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*/
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readonly attribute AString accessKey;
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/**
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* Provides localized string of global keyboard accelerator for default
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* action, such as Ctrl+O for Open file
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*/
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readonly attribute AString keyboardShortcut;
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/**
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* Enumerated accessible role (see the constants defined in nsIAccessibleRole).
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*
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* @note The values might depend on platform because of variations. Widgets
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* can use ARIA role attribute to force the final role.
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*/
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readonly attribute unsigned long role;
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/**
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* Accessible states -- bit fields which describe boolean properties of node.
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* Many states are only valid given a certain role attribute that supports
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* them.
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*
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* @param aState - the first bit field (see nsIAccessibleStates::STATE_*
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* constants)
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* @param aExtraState - the second bit field
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* (see nsIAccessibleStates::EXT_STATE_* constants)
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*/
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void getState(out unsigned long aState, out unsigned long aExtraState);
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/**
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* Focused accessible child of node
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*/
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readonly attribute nsIAccessible focusedChild;
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/**
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* Attributes of accessible
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*/
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readonly attribute nsIPersistentProperties attributes;
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/**
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* Cached fields from a remote accessible
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*/
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readonly attribute nsIPersistentProperties cache;
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/**
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* Platform specific interface for accessible
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*/
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readonly attribute nsISupports nativeInterface;
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/**
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* Returns grouping information. Used for tree items, list items, tab panel
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* labels, radio buttons, etc. Also used for collectons of non-text objects.
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*
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* @param groupLevel - 1-based, similar to ARIA 'level' property
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* @param similarItemsInGroup - 1-based, similar to ARIA 'setsize' property,
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* inclusive of the current item
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* @param positionInGroup - 1-based, similar to ARIA 'posinset' property
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*/
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void groupPosition(out long aGroupLevel, out long aSimilarItemsInGroup,
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out long aPositionInGroup);
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/**
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* Accessible child which contains the coordinate at (x, y) in screen pixels.
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* If the point is in the current accessible but not in a child, the
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* current accessible will be returned.
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* If the point is in neither the current accessible or a child, then
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* null will be returned.
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*
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* @param x screen's x coordinate
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* @param y screen's y coordinate
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* @return the direct accessible child containing the given point
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*/
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nsIAccessible getChildAtPoint(in long x, in long y);
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/**
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* Deepest accessible child which contains the coordinate at (x, y) in screen
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* pixels. If the point is in the current accessible but not in a child, the
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* current accessible will be returned. If the point is in neither the current
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* accessible or a child, then null will be returned.
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*
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* @param x screen's x coordinate
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* @param y screen's y coordinate
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* @return the deepest accessible child containing the given point
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*/
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nsIAccessible getDeepestChildAtPoint(in long x, in long y);
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/**
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* Like GetDeepestChildAtPoint, but restricted to the current process.
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* If the point is within a remote document, the accessible for the browser
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* element containing that document will be returned; i.e. this will not
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* descend into the document. If called on an accessible inside a remote
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* document, this will fail.
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*
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* @param x screen's x coordinate
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* @param y screen's y coordinate
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* @return the deepest accessible child in this process containing the given
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* point
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*/
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nsIAccessible getDeepestChildAtPointInProcess(in long x, in long y);
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/**
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* Nth accessible child using zero-based index or last child if index less than zero
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*/
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nsIAccessible getChildAt(in long aChildIndex);
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/**
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* Return accessible relation by the given relation type (see.
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* constants defined in nsIAccessibleRelation).
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*/
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nsIAccessibleRelation getRelationByType(in unsigned long aRelationType);
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/**
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* Returns multiple accessible relations for this object.
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*/
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nsIArray getRelations();
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/**
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* Return accessible's x and y coordinates relative to the screen and
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* accessible's width and height in Dev pixels.
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*/
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void getBounds(out long x, out long y, out long width, out long height);
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/**
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* Return accessible's x and y coordinates relative to the screen and
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* accessible's width and height in CSS pixels.
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*/
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void getBoundsInCSSPixels(out long aX, out long aY, out long aWidth, out long aHeight);
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/**
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* Add or remove this accessible to the current selection
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*/
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void setSelected(in boolean isSelected);
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/**
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* Select this accessible node only
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*/
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void takeSelection();
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/**
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* Focus this accessible node,
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* The state STATE_FOCUSABLE indicates whether this node is normally focusable.
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* It is the callers responsibility to determine whether this node is focusable.
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* accTakeFocus on a node that is not normally focusable (such as a table),
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* will still set focus on that node, although normally that will not be visually
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* indicated in most style sheets.
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*/
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void takeFocus();
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/**
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* The number of accessible actions associated with this accessible
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*/
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readonly attribute uint8_t actionCount;
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/**
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* The name of the accessible action at the given zero-based index
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*/
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AString getActionName(in uint8_t index);
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/**
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* The description of the accessible action at the given zero-based index
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*/
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AString getActionDescription(in uint8_t aIndex);
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/**
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* Perform the accessible action at the given zero-based index
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* Action number 0 is the default action
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*/
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void doAction(in uint8_t index);
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/**
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* Makes an object visible on screen.
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*
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* @param scrollType - defines where the object should be placed on
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* the screen (see nsIAccessibleScrollType for
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* available constants).
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*/
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[can_run_script]
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void scrollTo(in unsigned long aScrollType);
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/**
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* Moves the top left of an object to a specified location.
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*
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* @param coordinateType [in] - specifies whether the coordinates are relative to
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* the screen or the parent object (for available
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* constants refer to nsIAccessibleCoordinateType)
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* @param x [in] - defines the x coordinate
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* @param y [in] - defines the y coordinate
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*/
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void scrollToPoint(in unsigned long coordinateType, in long x, in long y);
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/**
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* Dispatches an ANNOUNCEMENT event with this accessible as target.
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*
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* @param announcement [in] - string to use in announcement.
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* @param priority [in] - priority for announcement, could be
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* nsIAccessibleAnnouncementEvent.POLITE or
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* nsIAccessibleAnnouncementEvent.ASSERTIVE.
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*/
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void announce(in AString announcement, in unsigned short priority);
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/**
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* Get the role of this Accessible as an ARIA role token. This might have been
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* set explicitly (e.g. role="button") or it might be implicit in native
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* markup (e.g. <button> returns "button").
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*/
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readonly attribute AString computedARIARole;
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[notxpcom, nostdcall] InternalLocalAccessible toInternalAccessible();
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[notxpcom, nostdcall] InternalAccessible toInternalGeneric();
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};
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