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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CHROME_FRAME_COM_MESSAGE_EVENT_H_ | |
| 6 #define CHROME_FRAME_COM_MESSAGE_EVENT_H_ | |
| 7 | |
| 8 #include <atlbase.h> | |
| 9 #include <atlcom.h> | |
| 10 #include <mshtml.h> // IHTMLEventObj | |
| 11 | |
| 12 #include "base/basictypes.h" | |
| 13 #include "base/win/scoped_comptr.h" | |
| 14 | |
| 15 // Implements a MessageEvent compliant event object by providing MessageEvent | |
| 16 // specific properties itself and inherited properties from a browser provided | |
| 17 // event implementation. | |
| 18 // NOTE: The messagePort and source properties will always be NULL. | |
| 19 // See the HTML 5 spec for further details on a MessageEvent object: | |
| 20 // http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html#messag
eevent | |
| 21 class ComMessageEvent | |
| 22 : public CComObjectRootEx<CComSingleThreadModel>, | |
| 23 public IDispatch { | |
| 24 public: | |
| 25 ComMessageEvent(); | |
| 26 ~ComMessageEvent(); | |
| 27 | |
| 28 BEGIN_COM_MAP(ComMessageEvent) | |
| 29 COM_INTERFACE_ENTRY(IDispatch) | |
| 30 END_COM_MAP() | |
| 31 | |
| 32 // The dispids we support. These are based on HTML5 and not IHTMLEventObj5 | |
| 33 // (there are a couple of differences). | |
| 34 // http://dev.w3.org/html5/spec/Overview.html#messageevent | |
| 35 // vs http://msdn.microsoft.com/en-us/library/cc288548(VS.85).aspx | |
| 36 typedef enum { | |
| 37 DISPID_MESSAGE_EVENT_DATA = 201, | |
| 38 DISPID_MESSAGE_EVENT_ORIGIN, | |
| 39 DISPID_MESSAGE_EVENT_LAST_EVENT_ID, | |
| 40 DISPID_MESSAGE_EVENT_SOURCE, | |
| 41 DISPID_MESSAGE_EVENT_MESSAGE_PORT, | |
| 42 DISPID_MESSAGE_EVENT_TYPE | |
| 43 } MessageEventDispIds; | |
| 44 | |
| 45 // Utility function for checking Invoke flags and assigning a BSTR to the | |
| 46 // result variable. | |
| 47 HRESULT GetStringProperty(WORD flags, const wchar_t* value, VARIANT* result); | |
| 48 | |
| 49 STDMETHOD(GetTypeInfoCount)(UINT* info); | |
| 50 STDMETHOD(GetTypeInfo)(UINT which_info, LCID lcid, ITypeInfo** type_info); | |
| 51 STDMETHOD(GetIDsOfNames)(REFIID iid, LPOLESTR* names, UINT count_names, | |
| 52 LCID lcid, DISPID* dispids); | |
| 53 STDMETHOD(Invoke)(DISPID dispid, REFIID iid, LCID lcid, WORD flags, | |
| 54 DISPPARAMS* params, VARIANT* result, EXCEPINFO* excepinfo, | |
| 55 UINT* arg_err); | |
| 56 | |
| 57 // Initializes this object. The container pointer is used to find the | |
| 58 // container's IHTMLEventObj implementation if available. | |
| 59 bool Initialize(IOleContainer* container, const std::string& message, | |
| 60 const std::string& origin, const std::string& event_type); | |
| 61 | |
| 62 protected: | |
| 63 // HTML Event object to which we delegate property and method | |
| 64 // calls that we do not directly support. This may not be initialized | |
| 65 // if our container does not require the properties/methods exposed by | |
| 66 // the basic event object. | |
| 67 base::win::ScopedComPtr<IHTMLEventObj> basic_event_; | |
| 68 std::string message_; | |
| 69 std::string origin_; | |
| 70 std::string type_; | |
| 71 | |
| 72 private: | |
| 73 DISALLOW_COPY_AND_ASSIGN(ComMessageEvent); | |
| 74 }; | |
| 75 | |
| 76 #endif // CHROME_FRAME_COM_MESSAGE_EVENT_H_ | |
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