Bug 708484 - Add camera capture stream provider for gonk (temporary solution) - get camera working in webpages [r=bz]

b2g/app/b2g.js

@@ -413,6 +413,10 @@ pref("dom.sms.whitelist", "file://,http://localhost:6666");
 // Ignore X-Frame-Options headers.
 pref("b2g.ignoreXFrameOptions", true);
 
+// controls if we want camera support
+pref("device.camera.enabled", true);
+pref("media.realtime_decoder.enabled", true);
+
 // "Preview" landing of bug 710563, which is bogged down in analysis
 // of talos regression.  This is a needed change for higher-framerate
 // CSS animations, and incidentally works around an apparent bug in

b2g/chrome/content/shell.js

@@ -79,9 +79,10 @@ function startupHttpd(baseDir, port) {
 // FIXME Bug 707625
 // until we have a proper security model, add some rights to
 // the pre-installed web applications
+// XXX never grant 'content-camera' to non-gaia apps
 function addPermissions(urls) {
   let permissions = [
-    'indexedDB', 'indexedDB-unlimited', 'webapps-manage', 'offline-app'
+    'indexedDB', 'indexedDB-unlimited', 'webapps-manage', 'offline-app', 'content-camera'
   ];
   urls.forEach(function(url) {
     let uri = Services.io.newURI(url, null, null);

b2g/components/B2GComponents.manifest

@@ -1,2 +1,7 @@
 # Scrollbars
 category agent-style-sheets browser-content-stylesheet chrome://browser/content/content.css
+
+# CameraContent.js
+component {eff4231b-abce-4f7f-a40a-d646e8fde3ce} CameraContent.js
+contract @mozilla.org/b2g-camera-content;1 {eff4231b-abce-4f7f-a40a-d646e8fde3ce}
+category JavaScript-navigator-property mozCamera @mozilla.org/b2g-camera-content;1

b2g/components/CameraContent.js

@@ -0,0 +1,83 @@
+/* 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 Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+
+const kProtocolName = "b2g-camera:";
+
+let CameraContent = function() {
+  this.hasPrivileges = false;
+  this.mapping = [];
+}
+ 
+CameraContent.prototype = {
+  getCameraURI: function(aOptions) {
+    if (!this.hasPrivileges)
+      return null;
+
+    let options = aOptions || { };
+    if (!options.camera)
+      options.camera = 0;
+    if (!options.width)
+      options.width = 320;
+    if (!options.height)
+      options.height = 240;
+
+    let uuid = Cc["@mozilla.org/uuid-generator;1"].getService(Ci.nsIUUIDGenerator).generateUUID().toString();
+    uuid = uuid.substring(1, uuid.length - 2); // remove the brackets
+    this.mapping.push(uuid);
+    let uri = kProtocolName + "?camera=" + options.camera + 
+                              "&width=" + options.width +
+                              "&height=" + options.height +
+                              "&type=video/x-raw-yuv";
+    // XXX that's no e10s ready, but the camera inputstream itself is not...
+    Services.prefs.setCharPref("b2g.camera." + kProtocolName + "?" + uuid, uri);
+    return kProtocolName + "?" + uuid;
+  },
+  
+  observe: function(aSubject, aTopic, aData) {
+    if (aTopic == "inner-window-destroyed") {
+      let wId = aSubject.QueryInterface(Ci.nsISupportsPRUint64).data;
+      if (wId == this.innerWindowID) {
+        Services.obs.removeObserver(this, "inner-window-destroyed");
+        for (let aId in this.mapping)
+          Services.prefs.clearUserPref("b2g.camera." + kProtocolName + "?" + aId);
+        this.mapping = null;
+      }
+    }
+  },
+
+  init: function(aWindow) {
+    let principal = aWindow.document.nodePrincipal;
+    let secMan = Cc["@mozilla.org/scriptsecuritymanager;1"].getService(Ci.nsIScriptSecurityManager);
+
+    let perm = principal == secMan.getSystemPrincipal() ? Ci.nsIPermissionManager.ALLOW_ACTION : Services.perms.testExactPermission(principal.URI, "content-camera");
+
+    //only pages with perm set and chrome pages can use the camera in content
+    this.hasPrivileges = perm == Ci.nsIPermissionManager.ALLOW_ACTION || from.schemeIs("chrome");
+
+    Services.obs.addObserver(this, "inner-window-destroyed", false);
+    let util = aWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);
+    this.innerWindowID = util.currentInnerWindowID;
+  },
+ 
+  classID: Components.ID("{eff4231b-abce-4f7f-a40a-d646e8fde3ce}"),
+
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIB2GCameraContent, Ci.nsIDOMGlobalPropertyInitializer, Ci.nsIObserver]),
+  
+  classInfo: XPCOMUtils.generateCI({classID: Components.ID("{eff4231b-abce-4f7f-a40a-d646e8fde3ce}"),
+                                    contractID: "@mozilla.org/b2g-camera-content;1",
+                                    interfaces: [Ci.nsIB2GCameraContent],
+                                    flags: Ci.nsIClassInfo.DOM_OBJECT,
+                                    classDescription: "B2G Camera Content Helper"})
+}
+ 
+const NSGetFactory = XPCOMUtils.generateNSGetFactory([CameraContent]);

b2g/components/Makefile.in

@@ -44,8 +44,13 @@ include $(DEPTH)/config/autoconf.mk
 MODULE = B2GComponents
 XPIDL_MODULE = B2GComponents
 
+XPIDLSRCS = \
+        b2g.idl \
+        $(NULL)
+
 EXTRA_PP_COMPONENTS = \
         B2GComponents.manifest \
+        CameraContent.js \
         $(NULL)
 
 include $(topsrcdir)/config/rules.mk

b2g/components/b2g.idl

@@ -0,0 +1,12 @@
+/* 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/. */
+
+#include "domstubs.idl"
+
+[scriptable, uuid(3615a616-571d-4194-bf54-ccf546067b14)]
+interface nsIB2GCameraContent : nsISupports
+{
+    /* temporary solution, waiting for getUserMedia */
+	DOMString getCameraURI([optional] in jsval options);
+};

b2g/installer/package-manifest.in

@@ -603,3 +603,4 @@ bin/components/@DLL_PREFIX@nkgnomevfs@DLL_SUFFIX@
 @BINPATH@/chrome/chrome.manifest
 @BINPATH@/components/B2GComponents.manifest
 @BINPATH@/components/B2GComponents.xpt
+@BINPATH@/components/CameraContent.js

netwerk/build/nsNetCID.h

@@ -709,6 +709,17 @@
     {0xae, 0xb7, 0xda, 0x62, 0xe7, 0x27, 0x3e, 0xd5} \
 }
 
+#ifdef MOZ_WIDGET_GONK
+#define NS_B2GPROTOCOLHANDLER_CLASSNAME \
+    "nsB2GProtocolHandler"
+#define NS_B2GPROTOCOLHANDLER_CID                    \
+{                                                    \
+/* {e50d101a-9db2-466f-977c-ae6af19e3b2f} */         \
+  0x50d101a, 0x9db2, 0x466f,                         \
+    {0x97, 0x7c, 0xae, 0x6a, 0xf1, 0x9e, 0x3b, 0x2f} \
+}
+#endif
+
 /******************************************************************************
  * netwerk/protocol/viewsource/ classes
  */

netwerk/build/nsNetModule.cpp

@@ -264,6 +264,10 @@ NS_GENERIC_FACTORY_CONSTRUCTOR(nsResURL)
 #ifdef NECKO_PROTOCOL_device
 #include "nsDeviceProtocolHandler.h"
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsDeviceProtocolHandler)
+#ifdef MOZ_WIDGET_GONK
+#include "nsB2GProtocolHandler.h"
+NS_GENERIC_FACTORY_CONSTRUCTOR(nsB2GProtocolHandler)
+#endif
 #endif
 
 #ifdef NECKO_PROTOCOL_viewsource
@@ -779,6 +783,9 @@ NS_DEFINE_NAMED_CID(NS_DATAPROTOCOLHANDLER_CID);
 #endif
 #ifdef NECKO_PROTOCOL_device
 NS_DEFINE_NAMED_CID(NS_DEVICEPROTOCOLHANDLER_CID);
+#ifdef MOZ_WIDGET_GONK
+NS_DEFINE_NAMED_CID(NS_B2GPROTOCOLHANDLER_CID);
+#endif
 #endif
 #ifdef NECKO_PROTOCOL_viewsource
 NS_DEFINE_NAMED_CID(NS_VIEWSOURCEHANDLER_CID);
@@ -910,6 +917,9 @@ static const mozilla::Module::CIDEntry kNeckoCIDs[] = {
 #endif
 #ifdef NECKO_PROTOCOL_device
     { &kNS_DEVICEPROTOCOLHANDLER_CID, false, NULL, nsDeviceProtocolHandlerConstructor},
+#ifdef MOZ_WIDGET_GONK
+    { &kNS_B2GPROTOCOLHANDLER_CID, false, NULL, nsB2GProtocolHandlerConstructor},
+#endif
 #endif
 #ifdef NECKO_PROTOCOL_viewsource
     { &kNS_VIEWSOURCEHANDLER_CID, false, NULL, nsViewSourceHandlerConstructor },
@@ -1050,6 +1060,9 @@ static const mozilla::Module::ContractIDEntry kNeckoContracts[] = {
 #endif
 #ifdef NECKO_PROTOCOL_device
     { NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "moz-device", &kNS_DEVICEPROTOCOLHANDLER_CID },
+#ifdef MOZ_WIDGET_GONK
+    { NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "b2g-camera", &kNS_B2GPROTOCOLHANDLER_CID },
+#endif
 #endif
 #ifdef NECKO_PROTOCOL_viewsource
     { NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "view-source", &kNS_VIEWSOURCEHANDLER_CID },

netwerk/protocol/device/Makefile.in

@@ -66,6 +66,7 @@ endif
 
 ifeq (gonk,$(MOZ_WIDGET_TOOLKIT))
 CPPSRCS += GonkCaptureProvider.cpp \
+           nsB2GProtocolHandler.cpp \
            $(NULL)
 endif
 

netwerk/protocol/device/nsB2GProtocolHandler.cpp

@@ -0,0 +1,117 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Camera.
+ *
+ * The Initial Developer of the Original Code is Mozilla Corporation
+ * Portions created by the Initial Developer are Copyright (C) 2009
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *  Nino D'Aversa <ninodaversa@gmail.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsB2GProtocolHandler.h"
+#include "nsDeviceChannel.h"
+#include "nsNetCID.h"
+#include "nsAutoPtr.h"
+#include "nsCOMPtr.h"
+#include "nsSimpleURI.h"
+#include "mozilla/Preferences.h"
+//-----------------------------------------------------------------------------
+
+NS_IMPL_THREADSAFE_ISUPPORTS1(nsB2GProtocolHandler,
+                              nsIProtocolHandler)
+
+nsresult
+nsB2GProtocolHandler::Init(){
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsB2GProtocolHandler::GetScheme(nsACString &aResult)
+{
+  aResult.AssignLiteral("b2g-camera");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsB2GProtocolHandler::GetDefaultPort(PRInt32 *aResult)
+{
+  *aResult = -1;        // no port for b2g-camera: URLs
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsB2GProtocolHandler::GetProtocolFlags(PRUint32 *aResult)
+{
+  *aResult = URI_NORELATIVE | URI_NOAUTH | URI_LOADABLE_BY_ANYONE | URI_IS_LOCAL_RESOURCE;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsB2GProtocolHandler::NewURI(const nsACString &spec,
+                                const char *originCharset,
+                                nsIURI *baseURI,
+                                nsIURI **result)
+{
+  nsRefPtr<nsSimpleURI> uri = new nsSimpleURI();
+  nsresult rv;
+
+  // XXX get the "real" uri from the pref
+  // should use ipdl when we'll use e10s
+  nsCString key("b2g.camera.");
+  key.Append(spec);
+  nsCString pref;
+  rv = mozilla::Preferences::GetCString(key.get(), &pref);
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = uri->SetSpec(pref);
+  mozilla::Preferences::ClearUser(key.BeginReading());
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return CallQueryInterface(uri, result);
+}
+
+NS_IMETHODIMP
+nsB2GProtocolHandler::NewChannel(nsIURI* aURI, nsIChannel **aResult)
+{
+  nsRefPtr<nsDeviceChannel> channel = new nsDeviceChannel();
+  nsresult rv = channel->Init(aURI);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return CallQueryInterface(channel, aResult);
+}
+
+NS_IMETHODIMP 
+nsB2GProtocolHandler::AllowPort(PRInt32 port,
+                                   const char *scheme,
+                                   bool *aResult)
+{
+  // don't override anything.  
+  *aResult = false;
+  return NS_OK;
+}

netwerk/protocol/device/nsB2GProtocolHandler.h

@@ -0,0 +1,60 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Camera.
+ *
+ * The Initial Developer of the Original Code is Mozilla Corporation
+ * Portions created by the Initial Developer are Copyright (C) 2009
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *  Nino D'Aversa <ninodaversa@gmail.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef nsB2GProtocolHandler_h_
+#define nsB2GProtocolHandler_h_
+
+#include "nsIProtocolHandler.h"
+#include "nsString.h"
+
+// {e50d101a-9db2-466f-977c-ae6af19e3b2f}
+#define NS_B2GPROTOCOLHANDLER_CID                      \
+{ 0x50d101a, 0x9db2, 0x466f,                              \
+    {0x97, 0x7c, 0xae, 0x6a, 0xf1, 0x9e, 0x3b, 0x2f} }
+
+class nsB2GProtocolHandler : public nsIProtocolHandler {
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIPROTOCOLHANDLER
+
+  nsB2GProtocolHandler() {}
+  ~nsB2GProtocolHandler() {}
+
+  nsresult Init();
+};
+
+#endif