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// Copyright (c) 2011 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';
/**
* Creates a LayoutSettings object. This object encapsulates all settings and
* logic related to layout mode (portrait/landscape).
* @constructor
*/
function LayoutSettings() {
this.layoutOption_ = $('layout-option');
this.portraitRadioButton_ = $('portrait');
this.landscapeRadioButton_ = $('landscape');
this.wasLandscape_ = false;
this.updateState();
this.addEventListeners_();
}
cr.addSingletonGetter(LayoutSettings);
LayoutSettings.prototype = {
/**
* The radio button corresponding to the portrait option.
* @type {HTMLInputElement}
*/
get portraitRadioButton() {
return this.portraitRadioButton_;
},
/**
* The radio button corresponding to the landscape option.
* @type {HTMLInputElement}
*/
get landscapeRadioButton() {
return this.landscapeRadioButton_;
},
/**
* @return {boolean} true if |this.landscapeRadioButton_| is checked, false
* if not.
*/
isLandscape: function() {
return this.landscapeRadioButton_.checked;
},
/**
* @return {boolean} true if the chosen layout mode has changed since last
* time the state was updated.
*/
hasChanged_: function() {
return this.isLandscape() != this.wasLandscape_;
},
/**
* Saves the currently selected layout mode. Used in |this.hasChanged_|.
*/
updateState: function() {
this.wasLandscape_ = this.isLandscape();
},
/**
* Adding listeners to all layout related controls. The listeners take care
* of altering their behavior depending on |hasPendingPreviewRequest|.
* @private
*/
addEventListeners_: function() {
this.landscapeRadioButton_.onclick = this.onLayoutButtonClick_.bind(this);
this.portraitRadioButton_.onclick = this.onLayoutButtonClick_.bind(this);
document.addEventListener(customEvents.PDF_LOADED,
this.onPDFLoaded_.bind(this));
document.addEventListener(customEvents.PRINTER_CAPABILITIES_UPDATED,
this.onPrinterCapabilitiesUpdated_.bind(this));
},
/**
* Executes when a |customEvents.PRINTER_CAPABILITIES_UPDATED| event occurs.
* @private
*/
onPrinterCapabilitiesUpdated_: function(e) {
if (e.printerCapabilities.disableLandscapeOption)
this.fadeInOut_(e.printerCapabilities.disableLandscapeOption);
},
/**
* Listener executing when |this.landscapeRadioButton_| or
* |this.portraitRadioButton_| is clicked.
* @private
*/
onLayoutButtonClick_: function() {
// If the chosen layout is same as before, nothing needs to be done.
if (this.hasChanged_())
setDefaultValuesAndRegeneratePreview(true);
},
/**
* Listener executing when a |customEvents.PDF_LOADED| event occurs.
* @private
*/
onPDFLoaded_: function() {
this.fadeInOut_(!previewModifiable);
},
/**
* @param {boolean} fadeOut True if |this.layoutOption_| should be faded
* out, false if it should be faded in.
* @private
*/
fadeInOut_: function(fadeOut) {
fadeOut ? fadeOutOption(this.layoutOption_) :
fadeInOption(this.layoutOption_);
}
};
return {
LayoutSettings: LayoutSettings,
};
});
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