Browser Plugin: Add HTML5-like postMessage support

content/renderer/browser_plugin/browser_plugin_bindings.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/browser_plugin/browser_plugin_bindings.h"
 
 #include <cstdlib>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 23 matching lines @@
 using WebKit::WebString;
 
 namespace content {
 
 namespace {
 
 const char kAddEventListener[] = "addEventListener";
 const char kBackMethod[] = "back";
 const char kCanGoBack[] = "canGoBack";
 const char kCanGoForward[] = "canGoForward";
+const char kContentWindow[] = "contentWindow";
 const char kForwardMethod[] = "forward";
 const char kGetProcessId[] = "getProcessId";
 const char kGoMethod[] = "go";
 const char kPartitionAttribute[] = "partition";
 const char kReloadMethod[] = "reload";
 const char kRemoveEventListener[] = "removeEventListener";
 const char kSrcAttribute[] = "src";
 const char kStopMethod[] = "stop";
 const char kTerminateMethod[] = "terminate";
 
 BrowserPluginBindings* GetBindings(NPObject* object) {
   return static_cast<BrowserPluginBindings::BrowserPluginNPObject*>(object)->
       message_channel;
 }
 
+bool IdentifierIsContentWindow(NPIdentifier identifier) {
+  return WebBindings::getStringIdentifier(kContentWindow) == identifier;
+}
+
 bool IdentifierIsPartitionAttribute(NPIdentifier identifier) {
   return WebBindings::getStringIdentifier(kPartitionAttribute) == identifier;
 }
 
 bool IdentifierIsSrcAttribute(NPIdentifier identifier) {
   return WebBindings::getStringIdentifier(kSrcAttribute) == identifier;
 }
 
 int Int32FromNPVariant(const NPVariant& variant) {
   if (NPVARIANT_IS_INT32(variant))
@@ skipping 65 matching lines @@
 bool BrowserPluginBindingsInvokeDefault(NPObject* np_obj,
                                         const NPVariant* args,
                                         uint32 arg_count,
                                         NPVariant* result) {
   NOTIMPLEMENTED();
   return false;
 }
 
 bool BrowserPluginBindingsHasProperty(NPObject* np_obj, NPIdentifier name) {
   return IdentifierIsSrcAttribute(name) ||
+      IdentifierIsContentWindow(name) ||
       IdentifierIsPartitionAttribute(name);
 }
 
 bool BrowserPluginBindingsGetProperty(NPObject* np_obj, NPIdentifier name,
                                       NPVariant* result) {
   if (!np_obj)
     return false;
 
   if (!result)
     return false;
 
   // All attributes from here on rely on the bindings, so retrieve it once and
   // return on failure.
   BrowserPluginBindings* bindings = GetBindings(np_obj);
   if (!bindings)
     return false;
 
   if (IdentifierIsSrcAttribute(name)) {
     std::string src = bindings->instance()->GetSrcAttribute();
     return StringToNPVariant(src, result);
   }
 
+  if (IdentifierIsContentWindow(name)) {
+    NPObject* obj = bindings->instance()->GetContentWindow();
+    if (obj) {
+      result->type = NPVariantType_Object;
+      result->value.objectValue = WebBindings::retainObject(obj);
+    }
+    return true;
+  }
+
   if (IdentifierIsPartitionAttribute(name)) {
     std::string partition_id = bindings->instance()->GetPartitionAttribute();
     return StringToNPVariant(partition_id, result);
   }
 
   return false;
 }
 
 bool BrowserPluginBindingsSetProperty(NPObject* np_obj, NPIdentifier name,
                                       const NPVariant* variant) {
@@ skipping 345 matching lines @@
   for (BindingList::iterator iter = method_bindings_.begin();
        iter != method_bindings_.end();
        ++iter) {
     if ((*iter)->MatchesName(name) && (*iter)->arg_count() == arg_count)
       return (*iter)->Invoke(this, args, result);
   }
   return false;
 }
 
 }  // namespace content