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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview A class for walking "groups". Groups, intuitively, are logical
* collections of dom elements. See AbstractNodeWalker and the
* stopNodeDescent() method here for how groups are defined.
*/
goog.provide('cvox.GroupWalker');
goog.require('cvox.AbstractNodeWalker');
goog.require('cvox.BrailleUtil');
goog.require('cvox.CursorSelection');
goog.require('cvox.DescriptionUtil');
goog.require('cvox.DomUtil');
goog.require('cvox.GroupUtil');
/**
* @constructor
* @extends {cvox.AbstractNodeWalker}
*/
cvox.GroupWalker = function() {
cvox.AbstractNodeWalker.call(this);
};
goog.inherits(cvox.GroupWalker, cvox.AbstractNodeWalker);
/**
* @override
*/
cvox.GroupWalker.prototype.getDescription = function(prevSel, sel) {
return cvox.DescriptionUtil.getCollectionDescription(prevSel, sel);
};
/**
* @override
*/
cvox.GroupWalker.prototype.getBraille = function(prevSel, sel) {
throw 'getBraille is unsupported';
};
/**
* @override
*/
cvox.GroupWalker.prototype.getGranularityMsg = function() {
return Msgs.getMsg('group_strategy');
};
/**
* @override
*/
cvox.GroupWalker.prototype.stopNodeDescent = function(node) {
return cvox.GroupUtil.isLeafNode(node);
};
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