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authorSimon Hausmann <simon.hausmann@nokia.com>2012-01-06 14:44:00 +0100
committerSimon Hausmann <simon.hausmann@nokia.com>2012-01-06 14:44:00 +0100
commit40736c5763bf61337c8c14e16d8587db021a87d4 (patch)
treeb17a9c00042ad89cb1308e2484491799aa14e9f8 /Source/WebCore/html/HTMLMeterElement.cpp
downloadqtwebkit-40736c5763bf61337c8c14e16d8587db021a87d4.tar.gz
Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)
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+/*
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#if ENABLE(METER_TAG)
+#include "HTMLMeterElement.h"
+
+#include "Attribute.h"
+#include "EventNames.h"
+#include "ExceptionCode.h"
+#include "FormDataList.h"
+#include "HTMLFormElement.h"
+#include "HTMLNames.h"
+#include "HTMLParserIdioms.h"
+#include "MeterShadowElement.h"
+#include "RenderMeter.h"
+#include "ShadowRoot.h"
+#include <wtf/StdLibExtras.h>
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+HTMLMeterElement::HTMLMeterElement(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
+ : HTMLFormControlElement(tagName, document, form)
+{
+ ASSERT(hasTagName(meterTag));
+}
+
+HTMLMeterElement::~HTMLMeterElement()
+{
+}
+
+PassRefPtr<HTMLMeterElement> HTMLMeterElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
+{
+ RefPtr<HTMLMeterElement> meter = adoptRef(new HTMLMeterElement(tagName, document, form));
+ meter->createShadowSubtree();
+ return meter;
+}
+
+RenderObject* HTMLMeterElement::createRenderer(RenderArena* arena, RenderStyle*)
+{
+ return new (arena) RenderMeter(this);
+}
+
+const AtomicString& HTMLMeterElement::formControlType() const
+{
+ DEFINE_STATIC_LOCAL(const AtomicString, meter, ("meter"));
+ return meter;
+}
+
+bool HTMLMeterElement::supportsFocus() const
+{
+ return Node::supportsFocus() && !disabled();
+}
+
+void HTMLMeterElement::parseMappedAttribute(Attribute* attribute)
+{
+ if (attribute->name() == valueAttr || attribute->name() == minAttr || attribute->name() == maxAttr || attribute->name() == lowAttr || attribute->name() == highAttr || attribute->name() == optimumAttr)
+ didElementStateChange();
+ else
+ HTMLFormControlElement::parseMappedAttribute(attribute);
+}
+
+void HTMLMeterElement::attach()
+{
+ HTMLFormControlElement::attach();
+ didElementStateChange();
+}
+
+double HTMLMeterElement::min() const
+{
+ double min = 0;
+ parseToDoubleForNumberType(getAttribute(minAttr), &min);
+ return min;
+}
+
+void HTMLMeterElement::setMin(double min, ExceptionCode& ec)
+{
+ if (!isfinite(min)) {
+ ec = NOT_SUPPORTED_ERR;
+ return;
+ }
+ setAttribute(minAttr, String::number(min));
+}
+
+double HTMLMeterElement::max() const
+{
+ double max = std::max(1.0, min());
+ parseToDoubleForNumberType(getAttribute(maxAttr), &max);
+ return std::max(max, min());
+}
+
+void HTMLMeterElement::setMax(double max, ExceptionCode& ec)
+{
+ if (!isfinite(max)) {
+ ec = NOT_SUPPORTED_ERR;
+ return;
+ }
+ setAttribute(maxAttr, String::number(max));
+}
+
+double HTMLMeterElement::value() const
+{
+ double value = 0;
+ parseToDoubleForNumberType(getAttribute(valueAttr), &value);
+ return std::min(std::max(value, min()), max());
+}
+
+void HTMLMeterElement::setValue(double value, ExceptionCode& ec)
+{
+ if (!isfinite(value)) {
+ ec = NOT_SUPPORTED_ERR;
+ return;
+ }
+ setAttribute(valueAttr, String::number(value));
+}
+
+double HTMLMeterElement::low() const
+{
+ double low = min();
+ parseToDoubleForNumberType(getAttribute(lowAttr), &low);
+ return std::min(std::max(low, min()), max());
+}
+
+void HTMLMeterElement::setLow(double low, ExceptionCode& ec)
+{
+ if (!isfinite(low)) {
+ ec = NOT_SUPPORTED_ERR;
+ return;
+ }
+ setAttribute(lowAttr, String::number(low));
+}
+
+double HTMLMeterElement::high() const
+{
+ double high = max();
+ parseToDoubleForNumberType(getAttribute(highAttr), &high);
+ return std::min(std::max(high, low()), max());
+}
+
+void HTMLMeterElement::setHigh(double high, ExceptionCode& ec)
+{
+ if (!isfinite(high)) {
+ ec = NOT_SUPPORTED_ERR;
+ return;
+ }
+ setAttribute(highAttr, String::number(high));
+}
+
+double HTMLMeterElement::optimum() const
+{
+ double optimum = (max() + min()) / 2;
+ parseToDoubleForNumberType(getAttribute(optimumAttr), &optimum);
+ return std::min(std::max(optimum, min()), max());
+}
+
+void HTMLMeterElement::setOptimum(double optimum, ExceptionCode& ec)
+{
+ if (!isfinite(optimum)) {
+ ec = NOT_SUPPORTED_ERR;
+ return;
+ }
+ setAttribute(optimumAttr, String::number(optimum));
+}
+
+HTMLMeterElement::GaugeRegion HTMLMeterElement::gaugeRegion() const
+{
+ double lowValue = low();
+ double highValue = high();
+ double theValue = value();
+ double optimumValue = optimum();
+
+ if (optimumValue < lowValue) {
+ // The optimum range stays under low
+ if (theValue <= lowValue)
+ return GaugeRegionOptimum;
+ if (theValue <= highValue)
+ return GaugeRegionSuboptimal;
+ return GaugeRegionEvenLessGood;
+ }
+
+ if (highValue < optimumValue) {
+ // The optimum range stays over high
+ if (highValue <= theValue)
+ return GaugeRegionOptimum;
+ if (lowValue <= theValue)
+ return GaugeRegionSuboptimal;
+ return GaugeRegionEvenLessGood;
+ }
+
+ // The optimum range stays between high and low.
+ // According to the standard, <meter> never show GaugeRegionEvenLessGood in this case
+ // because the value is never less or greater than min or max.
+ if (lowValue <= theValue && theValue <= highValue)
+ return GaugeRegionOptimum;
+ return GaugeRegionSuboptimal;
+}
+
+double HTMLMeterElement::valueRatio() const
+{
+ double min = this->min();
+ double max = this->max();
+ double value = this->value();
+
+ if (max <= min)
+ return 0;
+ return (value - min) / (max - min);
+}
+
+void HTMLMeterElement::didElementStateChange()
+{
+ m_value->setWidthPercentage(valueRatio()*100);
+ if (RenderObject* render = renderer())
+ render->updateFromElement();
+}
+
+void HTMLMeterElement::createShadowSubtree()
+{
+ RefPtr<MeterBarElement> bar = MeterBarElement::create(document());
+ m_value = MeterValueElement::create(document());
+ ExceptionCode ec = 0;
+ bar->appendChild(m_value, ec);
+ ensureShadowRoot()->appendChild(bar, ec);
+}
+
+} // namespace
+#endif