Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame^] | 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 "core/accessibility/AccessibilityScrollbar.h" |
| 31 | |
| 32 | #include "core/platform/ScrollView.h" |
| 33 | |
| 34 | namespace WebCore { |
| 35 | |
| 36 | AccessibilityScrollbar::AccessibilityScrollbar(Scrollbar* scrollbar) |
| 37 | : m_scrollbar(scrollbar) |
| 38 | { |
| 39 | ASSERT(scrollbar); |
| 40 | } |
| 41 | |
| 42 | PassRefPtr<AccessibilityScrollbar> AccessibilityScrollbar::create(Scrollbar* scrollbar) |
| 43 | { |
| 44 | return adoptRef(new AccessibilityScrollbar(scrollbar)); |
| 45 | } |
| 46 | |
| 47 | LayoutRect AccessibilityScrollbar::elementRect() const |
| 48 | { |
| 49 | if (!m_scrollbar) |
| 50 | return LayoutRect(); |
| 51 | |
| 52 | return m_scrollbar->frameRect(); |
| 53 | } |
| 54 | |
| 55 | Document* AccessibilityScrollbar::document() const |
| 56 | { |
| 57 | AccessibilityObject* parent = parentObject(); |
| 58 | if (!parent) |
| 59 | return 0; |
| 60 | return parent->document(); |
| 61 | } |
| 62 | |
| 63 | AccessibilityOrientation AccessibilityScrollbar::orientation() const |
| 64 | { |
| 65 | if (!m_scrollbar) |
| 66 | return AccessibilityOrientationHorizontal; |
| 67 | |
| 68 | if (m_scrollbar->orientation() == HorizontalScrollbar) |
| 69 | return AccessibilityOrientationHorizontal; |
| 70 | if (m_scrollbar->orientation() == VerticalScrollbar) |
| 71 | return AccessibilityOrientationVertical; |
| 72 | |
| 73 | return AccessibilityOrientationHorizontal; |
| 74 | } |
| 75 | |
| 76 | bool AccessibilityScrollbar::isEnabled() const |
| 77 | { |
| 78 | if (!m_scrollbar) |
| 79 | return false; |
| 80 | return m_scrollbar->enabled(); |
| 81 | } |
| 82 | |
| 83 | float AccessibilityScrollbar::valueForRange() const |
| 84 | { |
| 85 | if (!m_scrollbar) |
| 86 | return 0; |
| 87 | |
| 88 | return m_scrollbar->currentPos() / m_scrollbar->maximum(); |
| 89 | } |
| 90 | |
| 91 | void AccessibilityScrollbar::setValue(float value) |
| 92 | { |
| 93 | if (!m_scrollbar) |
| 94 | return; |
| 95 | |
| 96 | if (!m_scrollbar->scrollableArea()) |
| 97 | return; |
| 98 | |
| 99 | float newValue = value * m_scrollbar->maximum(); |
| 100 | m_scrollbar->scrollableArea()->scrollToOffsetWithoutAnimation(m_scrollbar->orientation(), newValue); |
| 101 | } |
| 102 | |
| 103 | } // namespace WebCore |