accessibilityuielement.h

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#ifndef AccessibilityUIElement_h
#define AccessibilityUIElement_h

#include <JavaScriptCore/JSObjectRef.h>
#include <wtf/Vector.h>

#if PLATFORM(MAC)
#ifdef __OBJC__
typedef id PlatformUIElement;
#else
typedef struct objc_object* PlatformUIElement;
#endif
#elif PLATFORM(WIN)
#undef _WINSOCKAPI_
#define _WINSOCKAPI_ // Prevent inclusion of winsock.h in windows.h

#include <oleacc.h>
#include <WebCore/COMPtr.h>

typedef COMPtr<IAccessible> PlatformUIElement;
#else
typedef void* PlatformUIElement;
#endif

class AccessibilityUIElement {
public:
    AccessibilityUIElement(PlatformUIElement);
    AccessibilityUIElement(const AccessibilityUIElement&);
    ~AccessibilityUIElement();

    PlatformUIElement platformUIElement() { return m_element; }

    static JSObjectRef makeJSAccessibilityUIElement(JSContextRef, const AccessibilityUIElement&);

    void getLinkedUIElements(Vector<AccessibilityUIElement>&);
    void getDocumentLinks(Vector<AccessibilityUIElement>&);
    void getChildren(Vector<AccessibilityUIElement>&);
    void getChildrenWithRange(Vector<AccessibilityUIElement>&, unsigned location, unsigned length);
    
    AccessibilityUIElement getChildAtIndex(unsigned);
    AccessibilityUIElement titleUIElement();
    AccessibilityUIElement parentElement();
    
    // Methods - platform-independent implementations
    JSStringRef allAttributes();
    JSStringRef attributesOfLinkedUIElements();
    JSStringRef attributesOfDocumentLinks();
    JSStringRef attributesOfChildren();
    JSStringRef parameterizedAttributeNames();
    
    // Attributes - platform-independent implementations
    JSStringRef attributeValue(JSStringRef attribute);
    bool isAttributeSettable(JSStringRef attribute);
    JSStringRef role();
    JSStringRef title();
    JSStringRef description();
    double width();
    double height();
    double intValue();
    double minValue();
    double maxValue();
    int insertionPointLineNumber();
    JSStringRef selectedTextRange();
    bool supportsPressAction();

    // Table-specific attributes
    JSStringRef attributesOfColumnHeaders();
    JSStringRef attributesOfRowHeaders();
    JSStringRef attributesOfColumns();
    JSStringRef attributesOfRows();
    JSStringRef attributesOfVisibleCells();
    JSStringRef attributesOfHeader();
    int indexInTable();
    JSStringRef rowIndexRange();
    JSStringRef columnIndexRange();
    
    // Parameterized attributes
    int lineForIndex(int);
    JSStringRef boundsForRange(unsigned location, unsigned length);
    void setSelectedTextRange(unsigned location, unsigned length);
    
    // Table-specific
    AccessibilityUIElement cellForColumnAndRow(unsigned column, unsigned row);
    
private:
    static JSClassRef getJSClass();

    PlatformUIElement m_element;
};

#endif // AccessibilityUIElement_h