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      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 
    119