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// Copyright 2007 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview A generic interface for saving and restoring ranges.
*
* @author robbyw@google.com (Robby Walker)
*/
goog.provide('goog.dom.SavedRange');
goog.require('goog.Disposable');
goog.require('goog.debug.Logger');
/**
* Abstract interface for a saved range.
* @constructor
* @extends {goog.Disposable}
*/
goog.dom.SavedRange = function() {
goog.Disposable.call(this);
};
goog.inherits(goog.dom.SavedRange, goog.Disposable);
/**
* Logging object.
* @type {goog.debug.Logger}
* @private
*/
goog.dom.SavedRange.logger_ =
goog.debug.Logger.getLogger('goog.dom.SavedRange');
/**
* Restores the range and by default disposes of the saved copy. Take note:
* this means the by default SavedRange objects are single use objects.
* @param {boolean=} opt_stayAlive Whether this SavedRange should stay alive
* (not be disposed) after restoring the range. Defaults to false (dispose).
* @return {goog.dom.AbstractRange} The restored range.
*/
goog.dom.SavedRange.prototype.restore = function(opt_stayAlive) {
if (this.isDisposed()) {
goog.dom.SavedRange.logger_.severe(
'Disposed SavedRange objects cannot be restored.');
}
var range = this.restoreInternal();
if (!opt_stayAlive) {
this.dispose();
}
return range;
};
/**
* Internal method to restore the saved range.
* @return {goog.dom.AbstractRange} The restored range.
*/
goog.dom.SavedRange.prototype.restoreInternal = goog.abstractMethod;
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