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