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// Copyright (c) 2012 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.
cr.define('print_preview', function() {
'use strict';
/**
* Component that renders a search box for searching through destinations.
* @constructor
* @extends {print_preview.Component}
*/
function SearchBox() {
print_preview.Component.call(this);
/**
* Timeout used to control incremental search.
* @type {?number}
* @private
*/
this.timeout_ = null;
/**
* Input box where the query is entered.
* @type {HTMLInputElement}
* @private
*/
this.input_ = null;
};
/**
* Enumeration of event types dispatched from the search box.
* @enum {string}
*/
SearchBox.EventType = {
SEARCH: 'print_preview.SearchBox.SEARCH'
};
/**
* CSS classes used by the search box.
* @enum {string}
* @private
*/
SearchBox.Classes_ = {
INPUT: 'search-box-input'
};
/**
* Delay in milliseconds before dispatching a SEARCH event.
* @type {number}
* @const
* @private
*/
SearchBox.SEARCH_DELAY_ = 150;
SearchBox.prototype = {
__proto__: print_preview.Component.prototype,
/** @param {string} New query to set the search box's query to. */
setQuery: function(query) {
query = query || '';
this.input_.value = query.trim();
},
/** Sets the input element of the search box in focus. */
focus: function() {
this.input_.focus();
},
/** @override */
enterDocument: function() {
print_preview.Component.prototype.enterDocument.call(this);
this.tracker.add(this.input_, 'keydown', this.onInputKeyDown_.bind(this));
},
/** @override */
exitDocument: function() {
print_preview.Component.prototype.exitDocument.call(this);
this.input_ = null;
},
/** @override */
decorateInternal: function() {
this.input_ = this.getElement().getElementsByClassName(
SearchBox.Classes_.INPUT)[0];
},
/**
* @return {string} The current query of the search box.
* @private
*/
getQuery_: function() {
return this.input_.value.trim();
},
/**
* Dispatches a SEARCH event.
* @private
*/
dispatchSearchEvent_: function() {
this.timeout_ = null;
var searchEvent = new Event(SearchBox.EventType.SEARCH);
searchEvent.query = this.getQuery_();
this.dispatchEvent(searchEvent);
},
/**
* Called when the input element's value changes. Dispatches a search event.
* @private
*/
onInputKeyDown_: function() {
if (this.timeout_) {
clearTimeout(this.timeout_);
}
this.timeout_ = setTimeout(
this.dispatchSearchEvent_.bind(this), SearchBox.SEARCH_DELAY_);
}
};
// Export
return {
SearchBox: SearchBox
};
});
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