Initial import of the Chrome Frame codebase. Integration in chrome.gyp coming...

chrome_frame/com_message_event.h

+// Copyright (c) 2009 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_FRAME_COM_MESSAGE_EVENT_H_
+#define CHROME_FRAME_COM_MESSAGE_EVENT_H_
+
+#include <atlbase.h>
+#include <atlcom.h>
+#include <mshtml.h>  // IHTMLEventObj
+#include "base/basictypes.h"
+#include "base/scoped_comptr_win.h"
+
+// Implements a MessageEvent compliant event object by providing MessageEvent
+// specific properties itself and inherited properties from a browser provided
+// event implementation.
+// NOTE: The messagePort and source properties will always be NULL.
+// See the HTML 5 spec for further details on a MessageEvent object:
+// http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html#messageevent
+class ComMessageEvent
+    : public CComObjectRootEx<CComSingleThreadModel>,
+      public IDispatch {
+ public:
+  ComMessageEvent();
+  ~ComMessageEvent();
+
+BEGIN_COM_MAP(ComMessageEvent)
+  COM_INTERFACE_ENTRY(IDispatch)
+END_COM_MAP()
+
+  // The dispids we support.  These are based on HTML5 and not IHTMLEventObj5
+  // (there are a couple of differences).
+  // http://dev.w3.org/html5/spec/Overview.html#messageevent
+  // vs http://msdn.microsoft.com/en-us/library/cc288548(VS.85).aspx
+  typedef enum {
+    DISPID_MESSAGE_EVENT_DATA = 201,
+    DISPID_MESSAGE_EVENT_ORIGIN,
+    DISPID_MESSAGE_EVENT_LAST_EVENT_ID,
+    DISPID_MESSAGE_EVENT_SOURCE,
+    DISPID_MESSAGE_EVENT_MESSAGE_PORT,
+    DISPID_MESSAGE_EVENT_TYPE
+  } MessageEventDispIds;
+
+  // Utility function for checking Invoke flags and assigning a BSTR to the
+  // result variable.
+  HRESULT GetStringProperty(WORD flags, const wchar_t* value, VARIANT* result);
+
+  STDMETHOD(GetTypeInfoCount)(UINT* info);
+  STDMETHOD(GetTypeInfo)(UINT which_info, LCID lcid, ITypeInfo** type_info);
+  STDMETHOD(GetIDsOfNames)(REFIID iid, LPOLESTR* names, UINT count_names,
+                           LCID lcid, DISPID* dispids);
+  STDMETHOD(Invoke)(DISPID dispid, REFIID iid, LCID lcid, WORD flags,
+                    DISPPARAMS* params, VARIANT* result, EXCEPINFO* excepinfo,
+                    UINT* arg_err);
+
+  // Initializes this object.  The container pointer is used to find the
+  // container's IHTMLEventObj implementation if available.
+  bool Initialize(IOleContainer* container, const std::string& message,
+                  const std::string& origin, const std::string& event_type);
+
+ protected:
+  // HTML Event object to which we delegate property and method
+  // calls that we do not directly support.  This may not be initialized
+  // if our container does not require the properties/methods exposed by
+  // the basic event object.
+  ScopedComPtr<IHTMLEventObj> basic_event_;
+  std::string message_;
+  std::string origin_;
+  std::string type_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ComMessageEvent);
+};
+
+#endif  // CHROME_FRAME_COM_MESSAGE_EVENT_H_