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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 "WebKit.h"
     30 #include <WebCore/AccessibilityObject.h>
     31 #include <WebCore/AccessibilityObjectWrapperWin.h>
     32 
     33 class DECLSPEC_UUID("3dbd565b-db22-4d88-8e0e-778bde54524a") AccessibleBase : public IAccessibleComparable, public IServiceProvider, public WebCore::AccessibilityObjectWrapper {
     34 public:
     35     static AccessibleBase* createInstance(WebCore::AccessibilityObject*);
     36 
     37     // IServiceProvider
     38     virtual HRESULT STDMETHODCALLTYPE QueryService(REFGUID guidService, REFIID riid, void **ppv);
     39 
     40     // IUnknown
     41     virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject);
     42     virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++m_refCount; }
     43     virtual ULONG STDMETHODCALLTYPE Release(void);
     44 
     45     // IAccessible
     46     virtual HRESULT STDMETHODCALLTYPE get_accParent(IDispatch**);
     47     virtual HRESULT STDMETHODCALLTYPE get_accChildCount(long*);
     48     virtual HRESULT STDMETHODCALLTYPE get_accChild(VARIANT vChild, IDispatch** ppChild);
     49     virtual HRESULT STDMETHODCALLTYPE get_accName(VARIANT vChild, BSTR*);
     50     virtual HRESULT STDMETHODCALLTYPE get_accValue(VARIANT vChild, BSTR*);
     51     virtual HRESULT STDMETHODCALLTYPE get_accDescription(VARIANT, BSTR*);
     52     virtual HRESULT STDMETHODCALLTYPE get_accRole(VARIANT vChild, VARIANT* pvRole);
     53     virtual HRESULT STDMETHODCALLTYPE get_accState(VARIANT vChild, VARIANT* pvState);
     54     virtual HRESULT STDMETHODCALLTYPE get_accHelp(VARIANT vChild, BSTR* helpText);
     55     virtual HRESULT STDMETHODCALLTYPE get_accKeyboardShortcut(VARIANT vChild, BSTR*);
     56     virtual HRESULT STDMETHODCALLTYPE get_accFocus(VARIANT* pvFocusedChild);
     57     virtual HRESULT STDMETHODCALLTYPE get_accSelection(VARIANT* pvSelectedChild);
     58     virtual HRESULT STDMETHODCALLTYPE get_accDefaultAction(VARIANT vChild, BSTR* actionDescription);
     59     virtual HRESULT STDMETHODCALLTYPE accSelect(long selectionFlags, VARIANT vChild);
     60     virtual HRESULT STDMETHODCALLTYPE accLocation(long* left, long* top, long* width, long* height, VARIANT vChild);
     61     virtual HRESULT STDMETHODCALLTYPE accNavigate(long direction, VARIANT vFromChild, VARIANT* pvNavigatedTo);
     62     virtual HRESULT STDMETHODCALLTYPE accHitTest(long x, long y, VARIANT* pvChildAtPoint);
     63     virtual HRESULT STDMETHODCALLTYPE accDoDefaultAction(VARIANT vChild);
     64 
     65     // IAccessible - Not to be implemented.
     66     virtual HRESULT STDMETHODCALLTYPE put_accName(VARIANT, BSTR) { return E_NOTIMPL; }
     67     virtual HRESULT STDMETHODCALLTYPE put_accValue(VARIANT, BSTR) { return E_NOTIMPL; }
     68     virtual HRESULT STDMETHODCALLTYPE get_accHelpTopic(BSTR* helpFile, VARIANT, long* topicID)
     69     {
     70         *helpFile = 0;
     71         *topicID = 0;
     72         return E_NOTIMPL;
     73     }
     74 
     75     // IDispatch - Not to be implemented.
     76     virtual HRESULT STDMETHODCALLTYPE GetTypeInfoCount(UINT* count)
     77     {
     78         *count = 0;
     79         return E_NOTIMPL;
     80     }
     81     virtual HRESULT STDMETHODCALLTYPE GetTypeInfo(UINT, LCID, ITypeInfo** ppTInfo)
     82     {
     83         *ppTInfo = 0;
     84         return E_NOTIMPL;
     85     }
     86     virtual HRESULT STDMETHODCALLTYPE GetIDsOfNames(REFIID, LPOLESTR*, UINT, LCID, DISPID*) { return E_NOTIMPL; }
     87     virtual HRESULT STDMETHODCALLTYPE Invoke(DISPID, REFIID, LCID, WORD, DISPPARAMS*, VARIANT*, EXCEPINFO*, UINT*) { return E_NOTIMPL; }
     88 
     89     // WebCore::AccessiblityObjectWrapper
     90     virtual void detach() {
     91         ASSERT(m_object);
     92         m_object = 0;
     93     }
     94 
     95     // IAccessibleComparable
     96     virtual HRESULT STDMETHODCALLTYPE isSameObject(IAccessibleComparable* other, BOOL* result);
     97 
     98 protected:
     99     AccessibleBase(WebCore::AccessibilityObject*);
    100     virtual ~AccessibleBase();
    101 
    102     virtual WTF::String name() const;
    103     virtual WTF::String value() const;
    104     virtual long role() const;
    105 
    106     HRESULT getAccessibilityObjectForChild(VARIANT vChild, WebCore::AccessibilityObject*&) const;
    107 
    108     static AccessibleBase* wrapper(WebCore::AccessibilityObject*);
    109 
    110     int m_refCount;
    111 
    112 private:
    113     AccessibleBase() { }
    114 };
    115 
    116 #endif // AccessibleBase_h
    117 
    118