212 lines
6.1 KiB
C++
212 lines
6.1 KiB
C++
/*
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* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "config.h"
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#include "AccessibilityProgressIndicator.h"
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#include "AXObjectCache.h"
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#include "FloatConversion.h"
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#include "HTMLMeterElement.h"
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#include "HTMLNames.h"
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#include "HTMLProgressElement.h"
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#include "LocalizedStrings.h"
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#include "RenderMeter.h"
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#include "RenderObject.h"
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#include "RenderProgress.h"
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namespace WebCore {
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using namespace HTMLNames;
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AccessibilityProgressIndicator::AccessibilityProgressIndicator(RenderProgress* renderer)
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: AccessibilityRenderObject(renderer)
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{
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}
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Ref<AccessibilityProgressIndicator> AccessibilityProgressIndicator::create(RenderProgress* renderer)
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{
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return adoptRef(*new AccessibilityProgressIndicator(renderer));
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}
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AccessibilityProgressIndicator::AccessibilityProgressIndicator(RenderMeter* renderer)
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: AccessibilityRenderObject(renderer)
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{
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}
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Ref<AccessibilityProgressIndicator> AccessibilityProgressIndicator::create(RenderMeter* renderer)
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{
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return adoptRef(*new AccessibilityProgressIndicator(renderer));
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}
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bool AccessibilityProgressIndicator::computeAccessibilityIsIgnored() const
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{
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return accessibilityIsIgnoredByDefault();
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}
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String AccessibilityProgressIndicator::valueDescription() const
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{
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// If the author has explicitly provided a value through aria-valuetext, use it.
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String description = AccessibilityRenderObject::valueDescription();
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if (!description.isEmpty())
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return description;
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if (!m_renderer->isMeter())
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return description;
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HTMLMeterElement* meter = meterElement();
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if (!meter)
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return description;
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// The HTML spec encourages authors to include a textual representation of the meter's state in
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// the element's contents. We'll fall back on that if there is not a more accessible alternative.
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AccessibilityObject* axMeter = axObjectCache()->getOrCreate(meter);
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if (is<AccessibilityNodeObject>(axMeter))
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description = downcast<AccessibilityNodeObject>(axMeter)->accessibilityDescriptionForChildren();
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if (description.isEmpty())
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description = meter->textContent();
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String gaugeRegionValue = gaugeRegionValueDescription();
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if (!gaugeRegionValue.isEmpty())
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description = description.isEmpty() ? gaugeRegionValue : description + ", " + gaugeRegionValue;
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return description;
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}
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float AccessibilityProgressIndicator::valueForRange() const
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{
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if (!m_renderer)
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return 0.0;
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if (m_renderer->isProgress()) {
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HTMLProgressElement* progress = progressElement();
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if (progress && progress->position() >= 0)
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return narrowPrecisionToFloat(progress->value());
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}
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if (m_renderer->isMeter()) {
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if (HTMLMeterElement* meter = meterElement())
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return narrowPrecisionToFloat(meter->value());
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}
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// Indeterminate progress bar should return 0.
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return 0.0;
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}
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float AccessibilityProgressIndicator::maxValueForRange() const
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{
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if (!m_renderer)
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return 0.0;
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if (m_renderer->isProgress()) {
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if (HTMLProgressElement* progress = progressElement())
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return narrowPrecisionToFloat(progress->max());
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}
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if (m_renderer->isMeter()) {
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if (HTMLMeterElement* meter = meterElement())
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return narrowPrecisionToFloat(meter->max());
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}
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return 0.0;
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}
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float AccessibilityProgressIndicator::minValueForRange() const
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{
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if (!m_renderer)
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return 0.0;
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if (m_renderer->isProgress())
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return 0.0;
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if (m_renderer->isMeter()) {
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if (HTMLMeterElement* meter = meterElement())
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return narrowPrecisionToFloat(meter->min());
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}
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return 0.0;
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}
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AccessibilityRole AccessibilityProgressIndicator::roleValue() const
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{
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if (meterElement())
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return AccessibilityRole::Meter;
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return AccessibilityRole::ProgressIndicator;
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}
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HTMLProgressElement* AccessibilityProgressIndicator::progressElement() const
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{
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if (!is<RenderProgress>(*m_renderer))
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return nullptr;
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return downcast<RenderProgress>(*m_renderer).progressElement();
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}
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HTMLMeterElement* AccessibilityProgressIndicator::meterElement() const
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{
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if (!is<RenderMeter>(*m_renderer))
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return nullptr;
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return downcast<RenderMeter>(*m_renderer).meterElement();
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}
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String AccessibilityProgressIndicator::gaugeRegionValueDescription() const
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{
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#if PLATFORM(COCOA)
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if (!m_renderer || !m_renderer->isMeter())
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return String();
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// Only expose this when the author has explicitly specified the following attributes.
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if (!hasAttribute(lowAttr) && !hasAttribute(highAttr) && !hasAttribute(optimumAttr))
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return String();
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if (HTMLMeterElement* element = meterElement()) {
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switch (element->gaugeRegion()) {
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case HTMLMeterElement::GaugeRegionOptimum:
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return AXMeterGaugeRegionOptimumText();
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case HTMLMeterElement::GaugeRegionSuboptimal:
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return AXMeterGaugeRegionSuboptimalText();
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case HTMLMeterElement::GaugeRegionEvenLessGood:
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return AXMeterGaugeRegionLessGoodText();
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default:
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break;
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}
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}
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#endif
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return String();
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}
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Element* AccessibilityProgressIndicator::element() const
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{
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if (!m_renderer)
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return nullptr;
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if (m_renderer->isProgress())
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return progressElement();
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if (m_renderer->isMeter())
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return meterElement();
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return AccessibilityObject::element();
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}
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} // namespace WebCore
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