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 , m_parent(0) 42{ 43 ASSERT(scrollbar); 44} 45 46PassRefPtr<AccessibilityScrollbar> AccessibilityScrollbar::create(Scrollbar* scrollbar) 47{ 48 return adoptRef(new AccessibilityScrollbar(scrollbar)); 49} 50 51IntRect AccessibilityScrollbar::elementRect() const 52{ 53 if (!m_scrollbar) 54 return IntRect(); 55 56 return m_scrollbar->frameRect(); 57} 58 59Document* AccessibilityScrollbar::document() const 60{ 61 AccessibilityObject* parent = parentObject(); 62 if (!parent) 63 return 0; 64 return parent->document(); 65} 66 67AccessibilityOrientation AccessibilityScrollbar::orientation() const 68{ 69 if (!m_scrollbar) 70 return AccessibilityOrientationHorizontal; 71 72 if (m_scrollbar->orientation() == HorizontalScrollbar) 73 return AccessibilityOrientationHorizontal; 74 if (m_scrollbar->orientation() == VerticalScrollbar) 75 return AccessibilityOrientationVertical; 76 77 return AccessibilityOrientationHorizontal; 78} 79 80bool AccessibilityScrollbar::isEnabled() const 81{ 82 if (!m_scrollbar) 83 return false; 84 return m_scrollbar->enabled(); 85} 86 87float AccessibilityScrollbar::valueForRange() const 88{ 89 if (!m_scrollbar) 90 return 0; 91 92 return m_scrollbar->currentPos() / m_scrollbar->maximum(); 93} 94 95void AccessibilityScrollbar::setValue(float value) 96{ 97 if (!m_scrollbar) 98 return; 99 100 if (!m_scrollbar->scrollableArea()) 101 return; 102 103 float newValue = value * m_scrollbar->maximum(); 104 m_scrollbar->scrollableArea()->scrollToOffsetWithoutAnimation(m_scrollbar->orientation(), newValue); 105} 106 107} // namespace WebCore 108