| // 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. |
| |
| #ifndef CHROME_RENDERER_EXTERNAL_HOST_BINDINGS_H_ |
| #define CHROME_RENDERER_EXTERNAL_HOST_BINDINGS_H_ |
| |
| #include "ipc/ipc_sender.h" |
| #include "webkit/glue/cpp_bound_class.h" |
| |
| // ExternalHostBindings is the class backing the "externalHost" object |
| // accessible from Javascript |
| // |
| // We expose one function, for sending a message to the external host: |
| // postMessage(String message[, String target]); |
| class ExternalHostBindings : public webkit_glue::CppBoundClass { |
| public: |
| ExternalHostBindings(IPC::Sender* sender, int routing_id); |
| virtual ~ExternalHostBindings(); |
| |
| // Invokes the registered onmessage handler. |
| // Returns true on successful invocation. |
| bool ForwardMessageFromExternalHost(const std::string& message, |
| const std::string& origin, |
| const std::string& target); |
| |
| // Overridden to hold onto a pointer back to the web frame. |
| void BindToJavascript(WebKit::WebFrame* frame, const std::string& classname); |
| |
| private: |
| // Creates an uninitialized instance of a MessageEvent object. |
| // This is equivalent to calling window.document.createEvent("MessageEvent") |
| // in javascript. |
| bool CreateMessageEvent(NPObject** message_event); |
| |
| // The postMessage() function provided to Javascript. |
| void PostMessage(const webkit_glue::CppArgumentList& args, |
| webkit_glue::CppVariant* result); |
| |
| webkit_glue::CppVariant on_message_handler_; |
| WebKit::WebFrame* frame_; |
| IPC::Sender* sender_; |
| int routing_id_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ExternalHostBindings); |
| }; |
| |
| #endif // CHROME_RENDERER_EXTERNAL_HOST_BINDINGS_H_ |