WebUSB initial commit

browser/components/nsBrowserGlue.js

@@ -2241,6 +2241,9 @@ const ContentPermissionIntegration = {
       case "geolocation": {
         return new PermissionUI.GeolocationPermissionPrompt(request);
       }
+      case "usb": {
+        return new PermissionUI.USBPermissionPrompt(request);
+      }
       case "desktop-notification": {
         return new PermissionUI.DesktopNotificationPermissionPrompt(request);
       }

browser/components/preferences/in-content/content.xul

@@ -27,6 +27,9 @@
   <preference id="javascript.options.wasm"
               name="javascript.options.wasm"
               type="bool"/>
+  <preference id="dom.usb.enabled"
+              name="dom.usb.enabled"
+              type="bool"/>
 #ifdef MOZ_WEBRTC
   <preference id="media.peerconnection.enabled"
               name="media.peerconnection.enabled"
@@ -246,6 +249,14 @@
                     accesskey="&javascriptWasm.accesskey;" />
         </vbox>
       </row>
+      <row id="javascriptWebUSBRow">
+        <vbox align="start">
+          <checkbox id="javascriptWebUSBPolicy"
+                    preference="dom.usb.enabled"
+                    label="&javascriptWebusb.label;"
+                    accesskey="&javascriptWebusb.accesskey;" />
+        </vbox>
+      </row>
 #ifdef MOZ_WEBRTC
       <row id="javascriptRow2">
         <vbox align="start">

browser/locales/en-US/chrome/browser/browser.properties

@@ -367,6 +367,12 @@ geolocation.neverShareLocation.accesskey=N
 geolocation.shareWithSite2=Would you like to share your location with this site?
 geolocation.shareWithFile2=Would you like to share your location with this file?
 
+webUSB.connectToSite=Would you like to let this site access USB devices?
+webUSB.allow=Allow USB Devices
+webUSB.allow.accesskey=A
+webUSB.block=Block USB Devices
+webUSB.block.accesskey=B
+
 webNotifications.receiveForSession=Receive for this session
 webNotifications.receiveForSession.accesskey=s
 webNotifications.alwaysReceive=Always Receive Notifications

browser/locales/en-US/chrome/browser/preferences/content.dtd

@@ -48,6 +48,8 @@
 
 <!ENTITY  javascriptWasm.label           "Enable WebAssembly (WASM)">
 <!ENTITY  javascriptWasm.accesskey       "y">
+<!ENTITY  javascriptWebusb.label         "Enable WebUSB">
+<!ENTITY  javascriptWebusb.accesskey     "U">
 #ifdef MOZ_WEBRTC
 <!ENTITY  javascriptWebrtc.label           "Enable WebRTC">
 <!ENTITY  javascriptWebrtc.accesskey       "R">

browser/modules/PermissionUI.jsm

@@ -472,6 +472,59 @@ GeolocationPermissionPrompt.prototype = {
 
 PermissionUI.GeolocationPermissionPrompt = GeolocationPermissionPrompt;
 
+/**
+ * Creates a PermissionPrompt for the WebUSB API.
+ * USB access is granted for the current browser session.
+ */
+function getUSBString(name, fallback) {
+  try {
+    return gBrowserBundle.GetStringFromName(name);
+  } catch (ex) {
+    return fallback;
+  }
+}
+
+function USBPermissionPrompt(request) {
+  this.request = request;
+}
+
+USBPermissionPrompt.prototype = {
+  __proto__: PermissionPromptForRequestPrototype,
+
+  get permissionKey() {
+    return "usb";
+  },
+
+  get notificationID() {
+    return "web-usb";
+  },
+
+  get anchorID() {
+    return "default-notification-icon";
+  },
+
+  get message() {
+    return getUSBString("webUSB.connectToSite",
+                        "Would you like to let this site access USB devices?");
+  },
+
+  get promptActions() {
+    return [{
+      label: getUSBString("webUSB.allow", "Allow USB Devices"),
+      accessKey: getUSBString("webUSB.allow.accesskey", "A"),
+      action: Ci.nsIPermissionManager.ALLOW_ACTION,
+      expireType: Ci.nsIPermissionManager.EXPIRE_SESSION,
+    }, {
+      label: getUSBString("webUSB.block", "Block USB Devices"),
+      accessKey: getUSBString("webUSB.block.accesskey", "B"),
+      action: Ci.nsIPermissionManager.DENY_ACTION,
+      expireType: Ci.nsIPermissionManager.EXPIRE_SESSION,
+    }];
+  },
+};
+
+PermissionUI.USBPermissionPrompt = USBPermissionPrompt;
+
 /**
  * Creates a PermissionPrompt for a nsIContentPermissionRequest for
  * the Desktop Notification API.