1 /*

     2  * Copyright (C) 2008, 2009, 2010 Apple Inc. All Rights Reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 #ifndef AccessibleBase_h

    27 #define AccessibleBase_h

    28 

    29 #include <WebCore/AccessibilityObject.h>

    30 #include <WebCore/AccessibilityObjectWrapperWin.h>

    31 #include <WebKit/WebKit.h>

    32 #include <oleacc.h>

    33 

    34 class DECLSPEC_UUID("3dbd565b-db22-4d88-8e0e-778bde54524a") AccessibleBase : public IAccessibleComparable, public IServiceProvider, public WebCore::AccessibilityObjectWrapper {

    35 public:

    36     static AccessibleBase* createInstance(WebCore::AccessibilityObject*);

    37 

    38     // IServiceProvider

    39     virtual HRESULT STDMETHODCALLTYPE QueryService(REFGUID guidService, REFIID riid, void **ppv);

    40 

    41     // IUnknown

    42     virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject);

    43     virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++m_refCount; }

    44     virtual ULONG STDMETHODCALLTYPE Release(void);

    45 

    46     // IAccessible

    47     virtual HRESULT STDMETHODCALLTYPE get_accParent(IDispatch**);

    48     virtual HRESULT STDMETHODCALLTYPE get_accChildCount(long*);

    49     virtual HRESULT STDMETHODCALLTYPE get_accChild(VARIANT vChild, IDispatch** ppChild);

    50     virtual HRESULT STDMETHODCALLTYPE get_accName(VARIANT vChild, BSTR*);

    51     virtual HRESULT STDMETHODCALLTYPE get_accValue(VARIANT vChild, BSTR*);

    52     virtual HRESULT STDMETHODCALLTYPE get_accDescription(VARIANT, BSTR*);

    53     virtual HRESULT STDMETHODCALLTYPE get_accRole(VARIANT vChild, VARIANT* pvRole);

    54     virtual HRESULT STDMETHODCALLTYPE get_accState(VARIANT vChild, VARIANT* pvState);

    55     virtual HRESULT STDMETHODCALLTYPE get_accHelp(VARIANT vChild, BSTR* helpText);

    56     virtual HRESULT STDMETHODCALLTYPE get_accKeyboardShortcut(VARIANT vChild, BSTR*);

    57     virtual HRESULT STDMETHODCALLTYPE get_accFocus(VARIANT* pvFocusedChild);

    58     virtual HRESULT STDMETHODCALLTYPE get_accSelection(VARIANT* pvSelectedChild);

    59     virtual HRESULT STDMETHODCALLTYPE get_accDefaultAction(VARIANT vChild, BSTR* actionDescription);

    60     virtual HRESULT STDMETHODCALLTYPE accSelect(long selectionFlags, VARIANT vChild);

    61     virtual HRESULT STDMETHODCALLTYPE accLocation(long* left, long* top, long* width, long* height, VARIANT vChild);

    62     virtual HRESULT STDMETHODCALLTYPE accNavigate(long direction, VARIANT vFromChild, VARIANT* pvNavigatedTo);

    63     virtual HRESULT STDMETHODCALLTYPE accHitTest(long x, long y, VARIANT* pvChildAtPoint);

    64     virtual HRESULT STDMETHODCALLTYPE accDoDefaultAction(VARIANT vChild);

    65 

    66     // IAccessible - Not to be implemented.

    67     virtual HRESULT STDMETHODCALLTYPE put_accName(VARIANT, BSTR) { return E_NOTIMPL; }

    68     virtual HRESULT STDMETHODCALLTYPE put_accValue(VARIANT, BSTR) { return E_NOTIMPL; }

    69     virtual HRESULT STDMETHODCALLTYPE get_accHelpTopic(BSTR* helpFile, VARIANT, long* topicID)

    70     {

    71         *helpFile = 0;

    72         *topicID = 0;

    73         return E_NOTIMPL;

    74     }

    75 

    76     // IDispatch - Not to be implemented.

    77     virtual HRESULT STDMETHODCALLTYPE GetTypeInfoCount(UINT* count)

    78     {

    79         *count = 0;

    80         return E_NOTIMPL;

    81     }

    82     virtual HRESULT STDMETHODCALLTYPE GetTypeInfo(UINT, LCID, ITypeInfo** ppTInfo)

    83     {

    84         *ppTInfo = 0;

    85         return E_NOTIMPL;

    86     }

    87     virtual HRESULT STDMETHODCALLTYPE GetIDsOfNames(REFIID, LPOLESTR*, UINT, LCID, DISPID*) { return E_NOTIMPL; }

    88     virtual HRESULT STDMETHODCALLTYPE Invoke(DISPID, REFIID, LCID, WORD, DISPPARAMS*, VARIANT*, EXCEPINFO*, UINT*) { return E_NOTIMPL; }

    89 

    90     // WebCore::AccessiblityObjectWrapper

    91     virtual void detach() {

    92         ASSERT(m_object);

    93         m_object = 0;

    94     }

    95 

    96     // IAccessibleComparable

    97     virtual HRESULT STDMETHODCALLTYPE isSameObject(IAccessibleComparable* other, BOOL* result);

    98 

    99 protected:

   100     AccessibleBase(WebCore::AccessibilityObject*);

   101     virtual ~AccessibleBase();

   102 

   103     virtual WebCore::String name() const;

   104     virtual WebCore::String value() const;

   105     virtual long role() const;

   106 

   107     HRESULT getAccessibilityObjectForChild(VARIANT vChild, WebCore::AccessibilityObject*&) const;

   108 

   109     static AccessibleBase* wrapper(WebCore::AccessibilityObject*);

   110 

   111     int m_refCount;

   112 

   113 private:

   114     AccessibleBase() { }

   115 };

   116 

   117 #endif // AccessibleBase_h

   118