1 files changed, 87 insertions, 0 deletions
diff --git a/b2g/components/B2GPresentationDevicePrompt.js b/b2g/components/B2GPresentationDevicePrompt.js
new file mode 100644
index 000000000..998e0b7ac
--- /dev/null
+++ b/b2g/components/B2GPresentationDevicePrompt.js
@@ -0,0 +1,87 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* 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";
+
+function debug(aMsg) {
+  //dump("-*- B2GPresentationDevicePrompt: " + aMsg + "\n");
+}
+
+const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
+
+const kB2GPRESENTATIONDEVICEPROMPT_CONTRACTID = "@mozilla.org/presentation-device/prompt;1";
+const kB2GPRESENTATIONDEVICEPROMPT_CID        = Components.ID("{4a300c26-e99b-4018-ab9b-c48cf9bc4de1}");
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "SystemAppProxy",
+                                  "resource://gre/modules/SystemAppProxy.jsm");
+
+function B2GPresentationDevicePrompt() {}
+
+B2GPresentationDevicePrompt.prototype = {
+  classID: kB2GPRESENTATIONDEVICEPROMPT_CID,
+  contractID: kB2GPRESENTATIONDEVICEPROMPT_CONTRACTID,
+  classDescription: "B2G Presentation Device Prompt",
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIPresentationDevicePrompt]),
+
+  // nsIPresentationDevicePrompt
+  promptDeviceSelection: function(aRequest) {
+    let self = this;
+    let requestId = Cc["@mozilla.org/uuid-generator;1"]
+                      .getService(Ci.nsIUUIDGenerator).generateUUID().toString();
+
+    SystemAppProxy.addEventListener("mozContentEvent", function contentEvent(aEvent) {
+      let detail = aEvent.detail;
+      if (detail.id !== requestId) {
+        return;
+      }
+
+      SystemAppProxy.removeEventListener("mozContentEvent", contentEvent);
+
+      switch (detail.type) {
+        case "presentation-select-result":
+          debug("device " + detail.deviceId + " is selected by user");
+          let device = self._getDeviceById(detail.deviceId);
+          if (!device) {
+            debug("cancel request because device is not found");
+            aRequest.cancel(Cr.NS_ERROR_DOM_NOT_FOUND_ERR);
+          }
+          aRequest.select(device);
+          break;
+        case "presentation-select-deny":
+          debug("request canceled by user");
+          aRequest.cancel(Cr.NS_ERROR_DOM_NOT_ALLOWED_ERR);
+          break;
+      }
+    });
+
+    let detail = {
+      type: "presentation-select-device",
+      origin: aRequest.origin,
+      requestURL: aRequest.requestURL,
+      id: requestId,
+    };
+
+    SystemAppProxy.dispatchEvent(detail);
+  },
+
+  _getDeviceById: function(aDeviceId) {
+    let deviceManager = Cc["@mozilla.org/presentation-device/manager;1"]
+                          .getService(Ci.nsIPresentationDeviceManager);
+    let devices = deviceManager.getAvailableDevices().QueryInterface(Ci.nsIArray);
+
+    for (let i = 0; i < devices.length; i++) {
+      let device = devices.queryElementAt(i, Ci.nsIPresentationDevice);
+      if (device.id === aDeviceId) {
+        return device;
+      }
+    }
+
+    return null;
+  },
+};
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory([B2GPresentationDevicePrompt]);