1/* 2 * Copyright (C) 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include "config.h" 30#include "AccessibilityScrollbar.h" 31 32#include "AXObjectCache.h" 33#include "FrameView.h" 34#include "ScrollView.h" 35#include "Scrollbar.h" 36 37namespace WebCore { 38 39AccessibilityScrollbar::AccessibilityScrollbar(Scrollbar* scrollbar) 40 : m_scrollbar(scrollbar) 41{ 42 ASSERT(scrollbar); 43} 44 45PassRefPtr<AccessibilityScrollbar> AccessibilityScrollbar::create(Scrollbar* scrollbar) 46{ 47 return adoptRef(new AccessibilityScrollbar(scrollbar)); 48} 49 50LayoutRect AccessibilityScrollbar::elementRect() const 51{ 52 if (!m_scrollbar) 53 return LayoutRect(); 54 55 return m_scrollbar->frameRect(); 56} 57 58Document* AccessibilityScrollbar::document() const 59{ 60 AccessibilityObject* parent = parentObject(); 61 if (!parent) 62 return 0; 63 return parent->document(); 64} 65 66AccessibilityOrientation AccessibilityScrollbar::orientation() const 67{ 68 if (!m_scrollbar) 69 return AccessibilityOrientationHorizontal; 70 71 if (m_scrollbar->orientation() == HorizontalScrollbar) 72 return AccessibilityOrientationHorizontal; 73 if (m_scrollbar->orientation() == VerticalScrollbar) 74 return AccessibilityOrientationVertical; 75 76 return AccessibilityOrientationHorizontal; 77} 78 79bool AccessibilityScrollbar::isEnabled() const 80{ 81 if (!m_scrollbar) 82 return false; 83 return m_scrollbar->enabled(); 84} 85 86float AccessibilityScrollbar::valueForRange() const 87{ 88 if (!m_scrollbar) 89 return 0; 90 91 return m_scrollbar->currentPos() / m_scrollbar->maximum(); 92} 93 94void AccessibilityScrollbar::setValue(float value) 95{ 96 if (!m_scrollbar) 97 return; 98 99 if (!m_scrollbar->scrollableArea()) 100 return; 101 102 float newValue = value * m_scrollbar->maximum(); 103 m_scrollbar->scrollableArea()->scrollToOffsetWithoutAnimation(m_scrollbar->orientation(), newValue); 104} 105 106} // namespace WebCore 107