Code to facilitate sending message to external host.

Note that at this time the parameters to the message
are still tentative. The call goes as a sync call from
renderer to the browser. From then onwards it happens 
async and no return value is available yet.


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@957 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 70 insertions, 0 deletions

diff --git a/chrome/renderer/external_host_bindings.cc b/chrome/renderer/external_host_bindings.cc
new file mode 100644
index 0000000..ffcd5fd
--- /dev/null
+++ b/chrome/renderer/external_host_bindings.cc
@@ -0,0 +1,70 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "chrome/renderer/external_host_bindings.h"
+
+#include "base/json_writer.h"
+#include "base/scoped_handle.h"
+#include "base/values.h"
+#include "chrome/common/render_messages.h"
+#include "chrome/common/stl_util-inl.h"
+
+ExternalHostBindings::ExternalHostBindings() : routing_id_(0), sender_(NULL) {
+  BindMethod("postMessage", &ExternalHostBindings::postMessage);
+}
+
+ExternalHostBindings::~ExternalHostBindings() {
+  STLDeleteContainerPointers(properties_.begin(), properties_.end());
+}
+
+void ExternalHostBindings::postMessage(const CppArgumentList& args,
+                                       CppVariant* result) {
+  // We expect at least a string message identifier, and optionally take
+  // an object parameter.  If we get anything else we bail.
+  if (args.size() < 2)
+    return;
+
+  // Args should be strings.
+  if (!args[0].isString() && !args[1].isString())
+    return;
+
+  const std::string receiver = args[0].ToString();
+  const std::string message = args[1].ToString();
+
+  sender_->Send(
+      new ViewHostMsg_ExternalHostMessage(routing_id_, receiver, message));
+}
+
+void ExternalHostBindings::SetProperty(const std::string& name,
+                                       const std::string& value) {
+  CppVariant* cpp_value = new CppVariant;
+  cpp_value->Set(value);
+  BindProperty(name, cpp_value);
+  properties_.push_back(cpp_value);
+}