| // 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 {boolean} Whether the selected destination is valid. |
| */ |
| isSelectedDestinationValid: function() { |
| return this.selectedDestination && |
| this.selectedDestination.id && |
| this.selectedDestination.origin; |
| }, |
| |
| /** |
| * @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 |
| }; |
| }); |
