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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';
/**
* Object used to represent a recent destination in the app state.
* @constructor
*/
function RecentDestination(destination) {
/**
* ID of the RecentDestination.
* @type {string}
*/
this.id = destination.id;
/**
* Origin of the RecentDestination.
* @type {string}
*/
this.origin = destination.origin;
/**
* Account the RecentDestination is registered for.
* @type {string}
*/
this.account = destination.account || '';
/**
* CDD of the RecentDestination.
* @type {print_preview.Cdd}
*/
this.capabilities = destination.capabilities;
/**
* Name of the RecentDestination.
* @type {string}
*/
this.name = destination.name || '';
/**
* Extension ID associated with the RecentDestination.
* @type {string}
*/
this.extensionId = destination.extension_id || '';
/**
* Extension name associated with the RecentDestination.
* @type {string}
*/
this.extensionName = destination.extension_name || '';
};
/**
* Object used to get and persist the print preview application state.
* @constructor
*/
function AppState() {
/**
* Internal representation of application state.
* @type {Object}
* @private
*/
this.state_ = {};
this.state_[AppState.Field.VERSION] = AppState.VERSION_;
this.state_[AppState.Field.IS_GCP_PROMO_DISMISSED] = true;
this.state_[AppState.Field.RECENT_DESTINATIONS] = [];
/**
* Whether the app state has been initialized. The app state will ignore all
* writes until it has been initialized.
* @type {boolean}
* @private
*/
this.isInitialized_ = false;
};
/**
* Number of recent print destinations to store across browser sessions.
* @const {number}
*/
AppState.NUM_DESTINATIONS_ = 3;
/**
* Enumeration of field names for serialized app state.
* @enum {string}
*/
AppState.Field = {
VERSION: 'version',
RECENT_DESTINATIONS: 'recentDestinations',
IS_GCP_PROMO_DISMISSED: 'isGcpPromoDismissed',
DPI: 'dpi',
MEDIA_SIZE: 'mediaSize',
MARGINS_TYPE: 'marginsType',
CUSTOM_MARGINS: 'customMargins',
IS_COLOR_ENABLED: 'isColorEnabled',
IS_DUPLEX_ENABLED: 'isDuplexEnabled',
IS_HEADER_FOOTER_ENABLED: 'isHeaderFooterEnabled',
IS_LANDSCAPE_ENABLED: 'isLandscapeEnabled',
IS_COLLATE_ENABLED: 'isCollateEnabled',
IS_FIT_TO_PAGE_ENABLED: 'isFitToPageEnabled',
IS_CSS_BACKGROUND_ENABLED: 'isCssBackgroundEnabled',
SCALING: 'scaling',
VENDOR_OPTIONS: 'vendorOptions'
};
/**
* Current version of the app state. This value helps to understand how to
* parse earlier versions of the app state.
* @type {number}
* @const
* @private
*/
AppState.VERSION_ = 2;
/**
* Name of C++ layer function to persist app state.
* @type {string}
* @const
* @private
*/
AppState.NATIVE_FUNCTION_NAME_ = 'saveAppState';
AppState.prototype = {
/**
* @return {?RecentDestination} The most recent destination, which is
* currently the selected destination.
*/
get selectedDestination() {
return (this.state_[AppState.Field.RECENT_DESTINATIONS].length > 0) ?
this.state_[AppState.Field.RECENT_DESTINATIONS][0] : null;
},
/**
* @return {?Array<!RecentDestination>} The AppState.NUM_DESTINATIONS_ most
* recent destinations.
*/
get recentDestinations() {
return this.state_[AppState.Field.RECENT_DESTINATIONS];
},
/** @return {boolean} Whether the GCP promotion has been dismissed. */
get isGcpPromoDismissed() {
return this.state_[AppState.Field.IS_GCP_PROMO_DISMISSED];
},
/**
* @param {!print_preview.AppState.Field} field App state field to check if
* set.
* @return {boolean} Whether a field has been set in the app state.
*/
hasField: function(field) {
return this.state_.hasOwnProperty(field);
},
/**
* @param {!print_preview.AppState.Field} field App state field to get.
* @return {?} Value of the app state field.
*/
getField: function(field) {
if (field == AppState.Field.CUSTOM_MARGINS) {
return this.state_[field] ?
print_preview.Margins.parse(this.state_[field]) : null;
} else {
return this.state_[field];
}
},
/**
* Initializes the app state from a serialized string returned by the native
* layer.
* @param {?string} serializedAppStateStr Serialized string representation
* of the app state.
*/
init: function(serializedAppStateStr) {
if (serializedAppStateStr) {
try {
var state = JSON.parse(serializedAppStateStr);
if (state[AppState.Field.VERSION] == AppState.VERSION_) {
this.state_ = state;
}
} catch(e) {
console.error('Unable to parse state: ' + e);
// Proceed with default state.
}
} else {
// Set some state defaults.
this.state_[AppState.Field.IS_GCP_PROMO_DISMISSED] = false;
this.state_[AppState.Field.RECENT_DESTINATIONS] = [];
}
if (!this.state_[AppState.Field.RECENT_DESTINATIONS]) {
this.state_[AppState.Field.RECENT_DESTINATIONS] = [];
} else if (!(this.state_[AppState.Field.RECENT_DESTINATIONS] instanceof
Array)) {
var tmp = this.state_[AppState.Field.RECENT_DESTINATIONS];
this.state_[AppState.Field.RECENT_DESTINATIONS] = [tmp];
} else if (!this.state_[AppState.Field.RECENT_DESTINATIONS][0] ||
!this.state_[AppState.Field.RECENT_DESTINATIONS][0].id) {
// read in incorrectly
this.state_[AppState.Field.RECENT_DESTINATIONS] = [];
} else if (this.state_[AppState.Field.RECENT_DESTINATIONS].length >
AppState.NUM_DESTINATIONS_) {
this.state_[AppState.Field.RECENT_DESTINATIONS].length =
AppState.NUM_DESTINATIONS_;
}
if (!loadTimeData.getBoolean('scalingEnabled'))
this.state_[AppState.Field.SCALING] = 100;
},
/**
* Sets to initialized state. Now object will accept persist requests.
*/
setInitialized: function() {
this.isInitialized_ = true;
},
/**
* Persists the given value for the given field.
* @param {!print_preview.AppState.Field} field Field to persist.
* @param {?} value Value of field to persist.
*/
persistField: function(field, value) {
if (!this.isInitialized_)
return;
if (field == AppState.Field.CUSTOM_MARGINS) {
this.state_[field] = value ? value.serialize() : null;
} else {
this.state_[field] = value;
}
this.persist_();
},
/**
* Persists the selected destination.
* @param {!print_preview.Destination} dest Destination to persist.
*/
persistSelectedDestination: function(dest) {
if (!this.isInitialized_)
return;
// Determine if this destination is already in the recent destinations,
// and where in the array it is located.
var newDestination = new RecentDestination(dest);
var indexFound = this.state_[
AppState.Field.RECENT_DESTINATIONS].findIndex(function(recent) {
return (newDestination.id == recent.id &&
newDestination.origin == recent.origin);
});
// No change
if (indexFound == 0) {
this.persist_();
return;
}
// Shift the array so that the nth most recent destination is located at
// index n.
if (indexFound == -1 &&
this.state_[AppState.Field.RECENT_DESTINATIONS].length ==
AppState.NUM_DESTINATIONS_) {
indexFound = AppState.NUM_DESTINATIONS_ - 1;
}
if (indexFound != -1)
this.state_[AppState.Field.RECENT_DESTINATIONS].splice(indexFound, 1);
// Add the most recent destination
this.state_[AppState.Field.RECENT_DESTINATIONS].splice(
0, 0, newDestination);
this.persist_();
},
/**
* Persists whether the GCP promotion has been dismissed.
* @param {boolean} isGcpPromoDismissed Whether the GCP promotion has been
* dismissed.
*/
persistIsGcpPromoDismissed: function(isGcpPromoDismissed) {
if (!this.isInitialized_)
return;
this.state_[AppState.Field.IS_GCP_PROMO_DISMISSED] = isGcpPromoDismissed;
this.persist_();
},
/**
* Calls into the native layer to persist the application state.
* @private
*/
persist_: function() {
chrome.send(AppState.NATIVE_FUNCTION_NAME_,
[JSON.stringify(this.state_)]);
}
};
return {
AppState: AppState
};
});
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