1/*
2 * Copyright (C) 2009 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 "AccessibilitySlider.h"
31
32#include "AXObjectCache.h"
33#include "HTMLInputElement.h"
34#include "HTMLNames.h"
35#include "RenderObject.h"
36#include "RenderSlider.h"
37#include "SliderThumbElement.h"
38
39namespace WebCore {
40
41using namespace HTMLNames;
42
43AccessibilitySlider::AccessibilitySlider(RenderObject* renderer)
44    : AccessibilityRenderObject(renderer)
45{
46}
47
48PassRefPtr<AccessibilitySlider> AccessibilitySlider::create(RenderObject* renderer)
49{
50    return adoptRef(new AccessibilitySlider(renderer));
51}
52
53AccessibilityOrientation AccessibilitySlider::orientation() const
54{
55    // Default to horizontal in the unknown case.
56    if (!m_renderer)
57        return AccessibilityOrientationHorizontal;
58
59    RenderStyle* style = m_renderer->style();
60    if (!style)
61        return AccessibilityOrientationHorizontal;
62
63    ControlPart styleAppearance = style->appearance();
64    switch (styleAppearance) {
65    case SliderThumbHorizontalPart:
66    case SliderHorizontalPart:
67    case MediaSliderPart:
68    case MediaFullScreenVolumeSliderPart:
69        return AccessibilityOrientationHorizontal;
70
71    case SliderThumbVerticalPart:
72    case SliderVerticalPart:
73    case MediaVolumeSliderPart:
74        return AccessibilityOrientationVertical;
75
76    default:
77        return AccessibilityOrientationHorizontal;
78    }
79}
80
81void AccessibilitySlider::addChildren()
82{
83    ASSERT(!m_haveChildren);
84
85    m_haveChildren = true;
86
87    AXObjectCache* cache = m_renderer->document()->axObjectCache();
88
89    AccessibilitySliderThumb* thumb = static_cast<AccessibilitySliderThumb*>(cache->getOrCreate(SliderThumbRole));
90    thumb->setParent(this);
91
92    // Before actually adding the value indicator to the hierarchy,
93    // allow the platform to make a final decision about it.
94    if (thumb->accessibilityIsIgnored())
95        cache->remove(thumb->axObjectID());
96    else
97        m_children.append(thumb);
98}
99
100const AtomicString& AccessibilitySlider::getAttribute(const QualifiedName& attribute) const
101{
102    return element()->getAttribute(attribute);
103}
104
105AccessibilityObject* AccessibilitySlider::elementAccessibilityHitTest(const IntPoint& point) const
106{
107    if (m_children.size()) {
108        ASSERT(m_children.size() == 1);
109        if (m_children[0]->elementRect().contains(point))
110            return m_children[0].get();
111    }
112
113    return axObjectCache()->getOrCreate(m_renderer);
114}
115
116float AccessibilitySlider::valueForRange() const
117{
118    return element()->value().toFloat();
119}
120
121float AccessibilitySlider::maxValueForRange() const
122{
123    return static_cast<float>(element()->maximum());
124}
125
126float AccessibilitySlider::minValueForRange() const
127{
128    return static_cast<float>(element()->minimum());
129}
130
131void AccessibilitySlider::setValue(const String& value)
132{
133    HTMLInputElement* input = element();
134
135    if (input->value() == value)
136        return;
137
138    input->setValue(value);
139
140    // Fire change event manually, as RenderSlider::setValueForPosition does.
141    input->dispatchFormControlChangeEvent();
142}
143
144HTMLInputElement* AccessibilitySlider::element() const
145{
146    return static_cast<HTMLInputElement*>(m_renderer->node());
147}
148
149
150AccessibilitySliderThumb::AccessibilitySliderThumb()
151{
152}
153
154PassRefPtr<AccessibilitySliderThumb> AccessibilitySliderThumb::create()
155{
156    return adoptRef(new AccessibilitySliderThumb());
157}
158
159LayoutRect AccessibilitySliderThumb::elementRect() const
160{
161    if (!m_parent)
162        return LayoutRect();
163
164    RenderObject* sliderRenderer = m_parent->renderer();
165    if (!sliderRenderer || !sliderRenderer->isSlider())
166        return LayoutRect();
167    return sliderThumbElementOf(sliderRenderer->node())->boundingBox();
168}
169
170bool AccessibilitySliderThumb::computeAccessibilityIsIgnored() const
171{
172    return accessibilityIsIgnoredByDefault();
173}
174
175} // namespace WebCore
176