1 files changed, 109 insertions, 0 deletions
diff --git a/chromium/mojo/public/js/bindings/connector.js b/chromium/mojo/public/js/bindings/connector.js
new file mode 100644
index 00000000000..51022b0e45f
--- /dev/null
+++ b/chromium/mojo/public/js/bindings/connector.js
@@ -0,0 +1,109 @@
+// 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.
+
+define("mojo/public/js/bindings/connector", [
+  "mojo/public/js/bindings/codec",
+  "mojo/public/js/bindings/core",
+  "mojo/public/js/bindings/support",
+], function(codec, core, support) {
+
+  function Connector(handle) {
+    this.handle_ = handle;
+    this.dropWrites_ = false;
+    this.error_ = false;
+    this.incomingReceiver_ = null;
+    this.readWaitCookie_ = null;
+    this.errorHandler_ = null;
+
+    this.waitToReadMore_();
+  }
+
+  Connector.prototype.close = function() {
+    if (this.readWaitCookie_) {
+      support.cancelWait(this.readWaitCookie_);
+      this.readWaitCookie_ = null;
+    }
+    if (this.handle_ != null) {
+      core.close(this.handle_);
+      this.handle_ = null;
+    }
+  };
+
+  Connector.prototype.accept = function(message) {
+    if (this.error_)
+      return false;
+
+    if (this.dropWrites_)
+      return true;
+
+    var result = core.writeMessage(this.handle_,
+                                   new Uint8Array(message.buffer.arrayBuffer),
+                                   message.handles,
+                                   core.WRITE_MESSAGE_FLAG_NONE);
+    switch (result) {
+      case core.RESULT_OK:
+        // The handles were successfully transferred, so we don't own them
+        // anymore.
+        message.handles = [];
+        break;
+      case core.RESULT_FAILED_PRECONDITION:
+        // There's no point in continuing to write to this pipe since the other
+        // end is gone. Avoid writing any future messages. Hide write failures
+        // from the caller since we'd like them to continue consuming any
+        // backlog of incoming messages before regarding the message pipe as
+        // closed.
+        this.dropWrites_ = true;
+        break;
+      default:
+        // This particular write was rejected, presumably because of bad input.
+        // The pipe is not necessarily in a bad state.
+        return false;
+    }
+    return true;
+  };
+
+  Connector.prototype.setIncomingReceiver = function(receiver) {
+    this.incomingReceiver_ = receiver;
+  };
+
+  Connector.prototype.setErrorHandler = function(handler) {
+    this.errorHandler_ = handler;
+  };
+
+  Connector.prototype.encounteredError = function() {
+    return this.error_;
+  };
+
+  Connector.prototype.waitToReadMore_ = function() {
+    this.readWaitCookie_ = support.asyncWait(this.handle_,
+                                             core.HANDLE_SIGNAL_READABLE,
+                                             this.readMore_.bind(this));
+  };
+
+  Connector.prototype.readMore_ = function(result) {
+    for (;;) {
+      var read = core.readMessage(this.handle_,
+                                  core.READ_MESSAGE_FLAG_NONE);
+      if (read.result == core.RESULT_SHOULD_WAIT) {
+        this.waitToReadMore_();
+        return;
+      }
+      if (read.result != core.RESULT_OK) {
+        this.error_ = true;
+        if (this.errorHandler_)
+          this.errorHandler_.onError(read.result);
+        return;
+      }
+      var buffer = new codec.Buffer(read.buffer);
+      var message = new codec.Message(buffer, read.handles);
+      if (this.incomingReceiver_) {
+          this.incomingReceiver_.accept(message);
+      }
+    }
+  };
+
+  var exports = {};
+  exports.Connector = Connector;
+  return exports;
+});