The Tor Browser: b2g/components/PaymentGlue.js@b8a032363ba2 (annotated)

b2g/components/PaymentGlue.js@b8a032363ba2 (annotated)

b2g/components/PaymentGlue.js

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 "use strict";
 const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 // JS shim that contains the callback functions to be triggered from the
 // payment provider's code in order to fire DOMRequest events.
 const kPaymentShimFile = "chrome://b2g/content/payment.js";
 // Type of MozChromEvents to handle payment dialogs.
 const kOpenPaymentConfirmationEvent = "open-payment-confirmation-dialog";
 const kOpenPaymentFlowEvent = "open-payment-flow-dialog";
 const PREF_DEBUG = "dom.payment.debug";
 XPCOMUtils.defineLazyServiceGetter(this, "uuidgen",
                                    "@mozilla.org/uuid-generator;1",
                                    "nsIUUIDGenerator");
 XPCOMUtils.defineLazyModuleGetter(this, "SystemAppProxy",
                                   "resource://gre/modules/SystemAppProxy.jsm");
 function PaymentUI() {
   try {
     this._debug =
       Services.prefs.getPrefType(PREF_DEBUG) == Ci.nsIPrefBranch.PREF_BOOL
       && Services.prefs.getBoolPref(PREF_DEBUG);
   } catch(e) {
     this._debug = false;
   }
 }
 PaymentUI.prototype = {
   confirmPaymentRequest: function confirmPaymentRequest(aRequestId,
                                                         aRequests,
                                                         aSuccessCb,
                                                         aErrorCb) {
     let _error = function _error(errorMsg) {
       if (aErrorCb) {
         aErrorCb.onresult(aRequestId, errorMsg);
       }
     };
     // The UI should listen for mozChromeEvent 'open-payment-confirmation-dialog'
     // type in order to create and show the payment request confirmation frame
     // embeded within a trusted dialog.
     let id = kOpenPaymentConfirmationEvent + "-" + this.getRandomId();
     let detail = {
       type: kOpenPaymentConfirmationEvent,
       id: id,
       requestId: aRequestId,
       paymentRequests: aRequests
     };
     // Once the user confirm the payment request and makes his choice, we get
     // back to the DOM part to get the appropriate payment flow information
     // based on the selected payment provider.
     this._handleSelection = (function _handleSelection(evt) {
       let msg = evt.detail;
       if (msg.id != id) {
         return;
       }
       if (msg.userSelection && aSuccessCb) {
         aSuccessCb.onresult(aRequestId, msg.userSelection);
       } else if (msg.errorMsg) {
         _error(msg.errorMsg);
       }
       SystemAppProxy.removeEventListener("mozContentEvent", this._handleSelection);
       this._handleSelection = null;
     }).bind(this);
     SystemAppProxy.addEventListener("mozContentEvent", this._handleSelection);
     SystemAppProxy.dispatchEvent(detail);
   },
   showPaymentFlow: function showPaymentFlow(aRequestId,
                                             aPaymentFlowInfo,
                                             aErrorCb) {
     let _error = function _error(errorMsg) {
       if (aErrorCb) {
         aErrorCb.onresult(aRequestId, errorMsg);
       }
     };
     // We ask the UI to browse to the selected payment flow.
     let id = kOpenPaymentFlowEvent + "-" + this.getRandomId();
     let detail = {
       type: kOpenPaymentFlowEvent,
       id: id,
       requestId: aRequestId,
       uri: aPaymentFlowInfo.uri,
       method: aPaymentFlowInfo.requestMethod,
       jwt: aPaymentFlowInfo.jwt
     };
     // At some point the UI would send the created iframe back so the
     // callbacks for firing DOMRequest events can be loaded on its
     // content.
     this._loadPaymentShim = (function _loadPaymentShim(evt) {
       let msg = evt.detail;
       if (msg.id != id) {
         return;
       }
       if (msg.errorMsg) {
         SystemAppProxy.removeEventListener("mozContentEvent", this._loadPaymentShim);
         this._loadPaymentShim = null;
         _error("ERROR_LOADING_PAYMENT_SHIM: " + msg.errorMsg);
         return;
       }
       if (!msg.frame) {
         SystemAppProxy.removeEventListener("mozContentEvent", this._loadPaymentShim);
         this._loadPaymentShim = null;
         _error("ERROR_LOADING_PAYMENT_SHIM");
         return;
       }
       // Try to load the payment shim file containing the payment callbacks
       // in the content script.
       let frame = msg.frame;
       let frameLoader = frame.QueryInterface(Ci.nsIFrameLoaderOwner)
                              .frameLoader;
       let mm = frameLoader.messageManager;
       try {
         mm.loadFrameScript(kPaymentShimFile, true, true);
         mm.sendAsyncMessage("Payment:LoadShim", { requestId: aRequestId });
       } catch (e) {
         if (this._debug) {
           this.LOG("Error loading " + kPaymentShimFile + " as a frame script: "
                     + e);
         }
         _error("ERROR_LOADING_PAYMENT_SHIM");
       } finally {
         SystemAppProxy.removeEventListener("mozContentEvent", this._loadPaymentShim);
         this._loadPaymentShim = null;
       }
     }).bind(this);
     SystemAppProxy.addEventListener("mozContentEvent", this._loadPaymentShim);
     // We also listen for UI notifications about a closed payment flow. The UI
     // should provide the reason of the closure within the 'errorMsg' parameter
     this._notifyPayFlowClosed = (function _notifyPayFlowClosed(evt) {
       let msg = evt.detail;
       if (msg.id != id) {
         return;
       }
       if (msg.type != 'cancel') {
         return;
       }
       if (msg.errorMsg) {
         _error(msg.errorMsg);
       }
       SystemAppProxy.removeEventListener("mozContentEvent",
                                          this._notifyPayFlowClosed);
       this._notifyPayFlowClosed = null;
     }).bind(this);
     SystemAppProxy.addEventListener("mozContentEvent",
                                this._notifyPayFlowClosed);
     SystemAppProxy.dispatchEvent(detail);
   },
   cleanup: function cleanup() {
     if (this._handleSelection) {
       SystemAppProxy.removeEventListener("mozContentEvent", this._handleSelection);
       this._handleSelection = null;
     }
     if (this._notifyPayFlowClosed) {
       SystemAppProxy.removeEventListener("mozContentEvent", this._notifyPayFlowClosed);
       this._notifyPayFlowClosed = null;
     }
     if (this._loadPaymentShim) {
       SystemAppProxy.removeEventListener("mozContentEvent", this._loadPaymentShim);
       this._loadPaymentShim = null;
     }
   },
   getRandomId: function getRandomId() {
     return uuidgen.generateUUID().toString();
   },
   LOG: function LOG(s) {
     if (!this._debug) {
       return;
     }
     dump("-*- PaymentGlue: " + s + "\n");
   },
   classID: Components.ID("{8b83eabc-7929-47f4-8b48-4dea8d887e4b}"),
   QueryInterface: XPCOMUtils.generateQI([Ci.nsIPaymentUIGlue])
 }
 this.NSGetFactory = XPCOMUtils.generateNSGetFactory([PaymentUI]);