DO NOT SUBMIT: what chrome/browser/resources/ could eventually look like with clang-format

chrome/browser/resources/cryptotoken/hidgnubbydevice.js

 // Copyright 2014 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.
 
 /**
  * @fileoverview Implements a low-level gnubby driver based on chrome.hid.
  */
 'use strict';
 
 /**
  * Low level gnubby 'driver'. One per physical USB device.
  * @param {Gnubbies} gnubbies The gnubbies instances this device is enumerated
  *     in.
  * @param {!chrome.hid.HidConnectInfo} dev The connection to the device.
  * @param {number} id The device's id.
  * @constructor
  * @implements {GnubbyDevice}
  */
 function HidGnubbyDevice(gnubbies, dev, id) {
   /** @private {Gnubbies} */
   this.gnubbies_ = gnubbies;
   this.dev = dev;
   this.id = id;
   this.txqueue = [];
   this.clients = [];
-  this.lockCID = 0;     // channel ID of client holding a lock, if != 0.
-  this.lockMillis = 0;  // current lock period.
-  this.lockTID = null;  // timer id of lock timeout.
-  this.closing = false;  // device to be closed by receive loop.
+  this.lockCID = 0;       // channel ID of client holding a lock, if != 0.
+  this.lockMillis = 0;    // current lock period.
+  this.lockTID = null;    // timer id of lock timeout.
+  this.closing = false;   // device to be closed by receive loop.
   this.updating = false;  // device firmware is in final stage of updating.
 }
 
 /**
  * Namespace for the HidGnubbyDevice implementation.
  * @const
  */
 HidGnubbyDevice.NAMESPACE = 'hid';
 
 /** Destroys this low-level device instance. */
 HidGnubbyDevice.prototype.destroy = function() {
-  if (!this.dev) return;  // Already dead.
+  if (!this.dev)
+    return;  // Already dead.
 
   function closeLowLevelDevice(dev) {
     chrome.hid.disconnect(dev.connectionId, function() {
       if (chrome.runtime.lastError) {
-        console.warn(UTIL_fmt('Device ' + dev.connectionId +
-            ' couldn\'t be disconnected:'));
+        console.warn(UTIL_fmt(
+            'Device ' + dev.connectionId + ' couldn\'t be disconnected:'));
         console.warn(UTIL_fmt(chrome.runtime.lastError.message));
         return;
       }
       console.log(UTIL_fmt('Device ' + dev.connectionId + ' closed'));
     });
   }
 
   this.gnubbies_.removeOpenDevice(
       {namespace: HidGnubbyDevice.NAMESPACE, device: this.id});
   this.closing = true;
 
   console.log(UTIL_fmt('HidGnubbyDevice.destroy()'));
 
   // Synthesize a close error frame to alert all clients,
   // some of which might be in read state.
   //
   // Use magic CID 0 to address all.
   this.publishFrame_(new Uint8Array([
-        0, 0, 0, 0,  // broadcast CID
-        GnubbyDevice.CMD_ERROR,
-        0, 1,  // length
-        GnubbyDevice.GONE]).buffer);
+                       0, 0, 0, 0,                    // broadcast CID
+                       GnubbyDevice.CMD_ERROR, 0, 1,  // length
+                       GnubbyDevice.GONE
+                     ]).buffer);
 
   // Set all clients to closed status and remove them.
   while (this.clients.length != 0) {
     var client = this.clients.shift();
-    if (client) client.closed = true;
+    if (client)
+      client.closed = true;
   }
 
   if (this.lockTID) {
     window.clearTimeout(this.lockTID);
     this.lockTID = null;
   }
 
   var dev = this.dev;
   this.dev = null;
   var reallyCloseDevice = closeLowLevelDevice.bind(null, dev);
@@ skipping 31 matching lines @@
 
   var remaining = [];
   var changes = false;
   for (var i = 0; i < old.length; ++i) {
     var client = old[i];
     if (client.receivedFrame(f)) {
       // Client still alive; keep on list.
       remaining.push(client);
     } else {
       changes = true;
-      console.log(UTIL_fmt(
-          '[' + Gnubby.hexCid(client.cid) + '] left?'));
+      console.log(UTIL_fmt('[' + Gnubby.hexCid(client.cid) + '] left?'));
     }
   }
-  if (changes) this.clients = remaining;
+  if (changes)
+    this.clients = remaining;
 };
 
 /**
  * Register a client for this gnubby.
  * @param {*} who The client.
  */
 HidGnubbyDevice.prototype.registerClient = function(who) {
   for (var i = 0; i < this.clients.length; ++i) {
-    if (this.clients[i] === who) return;  // Already registered.
+    if (this.clients[i] === who)
+      return;  // Already registered.
   }
   this.clients.push(who);
   if (this.clients.length == 1) {
     // First client? Kick off read loop.
     this.readLoop_();
   }
 };
 
 /**
  * De-register a client.
  * @param {*} who The client.
  * @return {number} The number of remaining listeners for this device, or -1
  * Returns number of remaining listeners for this device.
  *     if this had no clients to start with.
  */
 HidGnubbyDevice.prototype.deregisterClient = function(who) {
   var current = this.clients;
-  if (current.length == 0) return -1;
+  if (current.length == 0)
+    return -1;
   this.clients = [];
   for (var i = 0; i < current.length; ++i) {
     var client = current[i];
-    if (client !== who) this.clients.push(client);
+    if (client !== who)
+      this.clients.push(client);
   }
   return this.clients.length;
 };
 
 /**
  * @param {*} who The client.
  * @return {boolean} Whether this device has who as a client.
  */
 HidGnubbyDevice.prototype.hasClient = function(who) {
-  if (this.clients.length == 0) return false;
+  if (this.clients.length == 0)
+    return false;
   for (var i = 0; i < this.clients.length; ++i) {
     if (who === this.clients[i])
       return true;
   }
   return false;
 };
 
 /**
  * Reads all incoming frames and notifies clients of their receipt.
  * @private
  */
 HidGnubbyDevice.prototype.readLoop_ = function() {
-  //console.log(UTIL_fmt('entering readLoop'));
-  if (!this.dev) return;
+  // console.log(UTIL_fmt('entering readLoop'));
+  if (!this.dev)
+    return;
 
   if (this.closing) {
     this.destroy();
     return;
   }
 
   // No interested listeners, yet we hit readLoop().
   // Must be clean-up. We do this here to make sure no transfer is pending.
   if (!this.clients.length) {
     this.closing = true;
     this.destroy();
     return;
   }
 
   // firmwareUpdate() sets this.updating when writing the last block before
   // the signature. We process that reply with the already pending
   // read transfer but we do not want to start another read transfer for the
   // signature block, since that request will have no reply.
   // Instead we will see the device drop and re-appear on the bus.
   // Current libusb on some platforms gets unhappy when transfer are pending
   // when that happens.
   // TODO: revisit once Chrome stabilizes its behavior.
   if (this.updating) {
     console.log(UTIL_fmt('device updating. Ending readLoop()'));
     return;
   }
 
   var self = this;
-  chrome.hid.receive(
-    this.dev.connectionId,
-    function(report_id, data) {
-      if (chrome.runtime.lastError || !data) {
-        console.log(UTIL_fmt('receive got lastError:'));
-        console.log(UTIL_fmt(chrome.runtime.lastError.message));
-        window.setTimeout(function() { self.destroy(); }, 0);
-        return;
-      }
-      var u8 = new Uint8Array(data);
-      console.log(UTIL_fmt('<' + UTIL_BytesToHex(u8)));
+  chrome.hid.receive(this.dev.connectionId, function(report_id, data) {
+    if (chrome.runtime.lastError || !data) {
+      console.log(UTIL_fmt('receive got lastError:'));
+      console.log(UTIL_fmt(chrome.runtime.lastError.message));
+      window.setTimeout(function() {
+        self.destroy();
+      }, 0);
+      return;
+    }
+    var u8 = new Uint8Array(data);
+    console.log(UTIL_fmt('<' + UTIL_BytesToHex(u8)));
 
-      self.publishFrame_(data);
+    self.publishFrame_(data);
 
-      // Read more.
-      window.setTimeout(function() { self.readLoop_(); }, 0);
-    }
-  );
+    // Read more.
+    window.setTimeout(function() {
+      self.readLoop_();
+    }, 0);
+  });
 };
 
 /**
  * Check whether channel is locked for this request or not.
  * @param {number} cid Channel id
  * @param {number} cmd Request command
  * @return {boolean} true if not locked for this request.
  * @private
  */
 HidGnubbyDevice.prototype.checkLock_ = function(cid, cmd) {
   if (this.lockCID) {
     // We have an active lock.
     if (this.lockCID != cid) {
       // Some other channel has active lock.
 
-      if (cmd != GnubbyDevice.CMD_SYNC &&
-          cmd != GnubbyDevice.CMD_INIT) {
+      if (cmd != GnubbyDevice.CMD_SYNC && cmd != GnubbyDevice.CMD_INIT) {
         // Anything but SYNC|INIT gets an immediate busy.
-        var busy = new Uint8Array(
-            [(cid >> 24) & 255,
-             (cid >> 16) & 255,
-             (cid >> 8) & 255,
-             cid & 255,
-             GnubbyDevice.CMD_ERROR,
-             0, 1,  // length
-             GnubbyDevice.BUSY]);
+        var busy = new Uint8Array([
+          (cid >> 24) & 255, (cid >> 16) & 255, (cid >> 8) & 255, cid & 255,
+          GnubbyDevice.CMD_ERROR, 0, 1,  // length
+          GnubbyDevice.BUSY
+        ]);
         // Log the synthetic busy too.
         console.log(UTIL_fmt('<' + UTIL_BytesToHex(busy)));
         this.publishFrame_(busy.buffer);
         return false;
       }
 
       // SYNC|INIT gets to go to the device to flush OS tx/rx queues.
       // The usb firmware is to alway respond to SYNC/INIT,
       // regardless of lock status.
     }
@@ skipping 24 matching lines @@
         this.lockMillis = nseconds * 1000 + 100;
       } else {
         // Releasing lock voluntarily.
         this.lockCID = 0;
       }
     }
 
     // (re)set the lock timeout if we still hold it.
     if (this.lockCID) {
       var self = this;
-      this.lockTID = window.setTimeout(
-          function() {
-            console.warn(UTIL_fmt(
-                'lock for CID ' + Gnubby.hexCid(cid) + ' expired!'));
-            self.lockTID = null;
-            self.lockCID = 0;
-          },
-          this.lockMillis);
+      this.lockTID = window.setTimeout(function() {
+        console.warn(
+            UTIL_fmt('lock for CID ' + Gnubby.hexCid(cid) + ' expired!'));
+        self.lockTID = null;
+        self.lockCID = 0;
+      }, this.lockMillis);
     }
   }
 };
 
 /**
  * Queue command to be sent.
  * If queue was empty, initiate the write.
  * @param {number} cid The client's channel ID.
  * @param {number} cmd The command to send.
  * @param {ArrayBuffer|Uint8Array} data Command arguments
  */
 HidGnubbyDevice.prototype.queueCommand = function(cid, cmd, data) {
-  if (!this.dev) return;
-  if (!this.checkLock_(cid, cmd)) return;
+  if (!this.dev)
+    return;
+  if (!this.checkLock_(cid, cmd))
+    return;
 
   var u8 = new Uint8Array(data);
   var f = new Uint8Array(64);
 
   HidGnubbyDevice.setCid_(f, cid);
   f[4] = cmd;
   f[5] = (u8.length >> 8);
   f[6] = (u8.length & 255);
 
   var lockArg = (u8.length > 0) ? u8[0] : 0;
@@ skipping 36 matching lines @@
  * @param {ArrayBuffer} frame Data frame
  * @param {number} cid The client's channel ID.
  * @param {number} cmd The command to send.
  * @param {number} arg Command argument
  * @private
  */
 HidGnubbyDevice.prototype.queueFrame_ = function(frame, cid, cmd, arg) {
   this.updateLock_(cid, cmd, arg);
   var wasEmpty = (this.txqueue.length == 0);
   this.txqueue.push(frame);
-  if (wasEmpty) this.writePump_();
+  if (wasEmpty)
+    this.writePump_();
 };
 
 /**
  * Stuff queued frames from txqueue[] to device, one by one.
  * @private
  */
 HidGnubbyDevice.prototype.writePump_ = function() {
-  if (!this.dev) return;  // Ignore.
+  if (!this.dev)
+    return;  // Ignore.
 
-  if (this.txqueue.length == 0) return;  // Done with current queue.
+  if (this.txqueue.length == 0)
+    return;  // Done with current queue.
 
   var frame = this.txqueue[0];
 
   var self = this;
   function transferComplete() {
     if (chrome.runtime.lastError) {
       console.log(UTIL_fmt('send got lastError:'));
       console.log(UTIL_fmt(chrome.runtime.lastError.message));
-      window.setTimeout(function() { self.destroy(); }, 0);
+      window.setTimeout(function() {
+        self.destroy();
+      }, 0);
       return;
     }
     self.txqueue.shift();  // drop sent frame from queue.
     if (self.txqueue.length != 0) {
-      window.setTimeout(function() { self.writePump_(); }, 0);
+      window.setTimeout(function() {
+        self.writePump_();
+      }, 0);
     }
   }
 
   var u8 = new Uint8Array(frame);
 
   // See whether this requires scrubbing before logging.
   var alternateLog = Gnubby.hasOwnProperty('redactRequestLog') &&
-                     Gnubby['redactRequestLog'](u8);
+      Gnubby['redactRequestLog'](u8);
   if (alternateLog) {
     console.log(UTIL_fmt('>' + alternateLog));
   } else {
     console.log(UTIL_fmt('>' + UTIL_BytesToHex(u8)));
   }
 
   var u8f = new Uint8Array(64);
   for (var i = 0; i < u8.length; ++i) {
     u8f[i] = u8[i];
   }
 
   chrome.hid.send(
       this.dev.connectionId,
       0,  // report Id. Must be 0 for our use.
-      u8f.buffer,
-      transferComplete
-  );
+      u8f.buffer, transferComplete);
 };
 
 /**
  * List of legacy HID devices that do not support the F1D0 usage page as
  * mandated by the spec, but still need to be supported.
  * TODO: remove when these devices no longer need to be supported.
  * @const
  */
 HidGnubbyDevice.HID_VID_PIDS = [
-  {'vendorId': 4176, 'productId': 512}    // Google-specific Yubico HID
+  {'vendorId': 4176, 'productId': 512}  // Google-specific Yubico HID
 ];
 
 /**
  * @param {function(Array)} cb Enumeration callback
  * @param {GnubbyEnumerationTypes=} opt_type Which type of enumeration to do.
  */
 HidGnubbyDevice.enumerate = function(cb, opt_type) {
   /**
    * One pass using getDevices, and one for each of the hardcoded vid/pids.
    * @const
@@ skipping 28 matching lines @@
     }
   }
 
   // Pass 1: usagePage-based enumeration, for FIDO U2F devices. If non-FIDO
   // devices are asked for, "implement" this pass by providing it the empty
   // list. (enumerated requires that it's called once per pass.)
   var f1d0Filter = {usagePage: 0xf1d0};
   if (opt_type == GnubbyEnumerationTypes.VID_PID) {
     enumerated(f1d0Filter, []);
   } else {
-    chrome.hid.getDevices({filters: [f1d0Filter]},
-        enumerated.bind(null, f1d0Filter));
+    chrome.hid.getDevices(
+        {filters: [f1d0Filter]}, enumerated.bind(null, f1d0Filter));
   }
   // Pass 2: vid/pid-based enumeration, for legacy devices. If FIDO devices
   // are asked for, "implement" this pass by providing it the empty list.
   if (opt_type == GnubbyEnumerationTypes.FIDO_U2F) {
     enumerated(false, []);
   } else {
     for (var i = 0; i < HidGnubbyDevice.HID_VID_PIDS.length; i++) {
       var vidPid = HidGnubbyDevice.HID_VID_PIDS[i];
       chrome.hid.getDevices({filters: [vidPid]}, enumerated.bind(null, vidPid));
     }
@@ skipping 45 matching lines @@
  */
 HidGnubbyDevice.register = function(gnubbies) {
   var HID_GNUBBY_IMPL = {
     isSharedAccess: true,
     enumerate: HidGnubbyDevice.enumerate,
     deviceToDeviceId: HidGnubbyDevice.deviceToDeviceId,
     open: HidGnubbyDevice.open
   };
   gnubbies.registerNamespace(HidGnubbyDevice.NAMESPACE, HID_GNUBBY_IMPL);
 };