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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.
cr.define('print_preview', function() {
'use strict';
/**
* Toggles visibility of the specified printing options sections.
* @param {!print_preview.DestinationStore} destinationStore To listen for
* destination changes.
* @param {!Array.<print_preview.SettingsSection>} settingsSections Sections
* to toggle by this component.
* @constructor
* @extends {print_preview.Component}
*/
function MoreSettings(destinationStore, settingsSections) {
print_preview.Component.call(this);
/** @private {!print_preview.DestinationStore} */
this.destinationStore_ = destinationStore;
/** @private {!Array.<print_preview.SettingsSection>} */
this.settingsSections_ = settingsSections;
/** @private {MoreSettings.SettingsToShow} */
this.settingsToShow_ = MoreSettings.SettingsToShow.MOST_POPULAR;
/** @private {boolean} */
this.capabilitiesReady_ = false;
/** @private {boolean} */
this.firstDestinationReady_ = false;
};
/**
* Which settings are visible to the user.
* @enum {number}
*/
MoreSettings.SettingsToShow = {
MOST_POPULAR: 1,
ALL: 2
};
MoreSettings.prototype = {
__proto__: print_preview.Component.prototype,
/** @override */
enterDocument: function() {
print_preview.Component.prototype.enterDocument.call(this);
this.tracker.add(this.getElement(), 'click', this.onClick_.bind(this));
this.tracker.add(
this.destinationStore_,
print_preview.DestinationStore.EventType.DESTINATION_SELECT,
this.onDestinationChanged_.bind(this));
this.tracker.add(
this.destinationStore_,
print_preview.DestinationStore.EventType.
SELECTED_DESTINATION_CAPABILITIES_READY,
this.onDestinationCapabilitiesReady_.bind(this));
this.settingsSections_.forEach(function(section) {
this.tracker.add(
section,
print_preview.SettingsSection.EventType.COLLAPSIBLE_CONTENT_CHANGED,
this.updateState_.bind(this));
}.bind(this));
this.updateState_(true);
},
/**
* Toggles "more/fewer options" state and notifies all the options sections
* to reflect the new state.
* @private
*/
onClick_: function() {
this.settingsToShow_ =
this.settingsToShow_ == MoreSettings.SettingsToShow.MOST_POPULAR ?
MoreSettings.SettingsToShow.ALL :
MoreSettings.SettingsToShow.MOST_POPULAR;
this.updateState_(false);
},
/**
* Called when the destination selection has changed. Updates UI elements.
* @private
*/
onDestinationChanged_: function() {
this.firstDestinationReady_ = true;
this.capabilitiesReady_ = false;
this.updateState_(false);
},
/**
* Called when the destination selection has changed. Updates UI elements.
* @private
*/
onDestinationCapabilitiesReady_: function() {
this.capabilitiesReady_ = true;
this.updateState_(false);
},
/**
* Updates the component appearance according to the current state.
* @param {boolean} noAnimation Whether section visibility transitions
* should not be animated.
* @private
*/
updateState_: function(noAnimation) {
if (!this.firstDestinationReady_) {
fadeOutElement(this.getElement(), noAnimation);
return;
}
// When capabilities are not known yet, don't change the state to avoid
// unnecessary fade in/out cycles.
if (!this.capabilitiesReady_)
return;
var all = this.settingsToShow_ == MoreSettings.SettingsToShow.ALL;
this.getChildElement('.more-settings-label').textContent =
loadTimeData.getString(all ? 'lessOptionsLabel' : 'moreOptionsLabel');
var iconEl = this.getChildElement('.more-settings-icon');
iconEl.classList.toggle('more-settings-icon-plus', !all);
iconEl.classList.toggle('more-settings-icon-minus', all);
var availableSections = this.settingsSections_.reduce(
function(count, section) {
return count + (section.isAvailable() ? 1 : 0);
}, 0);
// Magic 6 is chosen as the number of sections when it still feels like
// manageable and not too crowded.
var hasSectionsToToggle =
availableSections > 6 &&
this.settingsSections_.some(function(section) {
return section.hasCollapsibleContent();
});
if (hasSectionsToToggle)
fadeInElement(this.getElement(), noAnimation);
else
fadeOutElement(this.getElement(), noAnimation);
var collapseContent =
this.settingsToShow_ == MoreSettings.SettingsToShow.MOST_POPULAR &&
hasSectionsToToggle;
this.settingsSections_.forEach(function(section) {
section.setCollapseContent(collapseContent, noAnimation);
});
}
};
// Export
return {
MoreSettings: MoreSettings
};
});
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