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// 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_
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