diff -r 000000000000 -r 4f2f89ce4247 WebCore/rendering/RenderMeter.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderMeter.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,186 @@
+/*
+ * 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 "RenderMeter.h"
+
+#include "HTMLMeterElement.h"
+#include "HTMLNames.h"
+#include "RenderTheme.h"
+#include "ShadowElement.h"
+
+using namespace std;
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+RenderMeter::RenderMeter(HTMLMeterElement* element)
+    : RenderIndicator(element)
+{
+}
+
+RenderMeter::~RenderMeter()
+{
+    if (m_valuePart)
+        m_valuePart->detach();
+    if (m_barPart)
+        m_barPart->detach();
+}
+
+void RenderMeter::calcWidth()
+{
+    RenderBox::calcWidth();
+    setWidth(theme()->meterSizeForBounds(this, frameRect()).width());
+}
+
+void RenderMeter::calcHeight()
+{
+    RenderBox::calcHeight();
+    setHeight(theme()->meterSizeForBounds(this, frameRect()).height());
+}
+
+void RenderMeter::layoutParts()
+{
+    // We refresh shadow node here because the state can depend
+    // on the frame size of this render object.
+    updatePartsState();
+    if (m_valuePart)
+        m_valuePart->layoutAsPart(valuePartRect());
+    if (m_barPart)
+        m_barPart->layoutAsPart(barPartRect());
+}
+
+bool RenderMeter::shouldHaveParts() const
+{
+    bool hasTheme = theme()->supportsMeter(style()->appearance(), isHorizontal());
+    if (!hasTheme)
+        return true;
+    bool shadowsHaveStyle = ShadowBlockElement::partShouldHaveStyle(this, barPseudoId()) || ShadowBlockElement::partShouldHaveStyle(this, valuePseudoId());
+    if (shadowsHaveStyle)
+        return true;
+    return false;
+}
+
+double RenderMeter::valueRatio() const
+{
+    HTMLMeterElement* element = static_cast<HTMLMeterElement*>(node());
+    double min = element->min();
+    double max = element->max();
+    double value = element->value();
+
+    if (max <= min)
+        return 0;
+    return (value - min) / (max - min);
+}
+
+IntRect RenderMeter::barPartRect() const
+{
+    return IntRect(borderLeft() + paddingLeft(), borderTop() + paddingTop(), lround(width() - borderLeft() - paddingLeft() - borderRight() - paddingRight()), height()  - borderTop() - paddingTop() - borderBottom() - paddingBottom());
+}
+
+IntRect RenderMeter::valuePartRect() const
+{
+    IntRect rect = barPartRect();
+    
+    if (rect.height() <= rect.width()) {
+        int width = static_cast<int>(rect.width()*valueRatio());
+        if (style()->direction() == RTL) {
+            rect.setX(rect.x() + (rect.width() - width));
+            rect.setWidth(width);
+        } else
+            rect.setWidth(width);
+    } else {
+        int height = static_cast<int>(rect.height()*valueRatio());
+        rect.setY(rect.y() + (rect.height() - height));
+        rect.setHeight(height);
+    }
+
+    return rect;
+}
+
+bool RenderMeter::isHorizontal() const
+{
+    IntRect rect = barPartRect();
+    return rect.height() <= rect.width();
+}
+
+PseudoId RenderMeter::valuePseudoId() const
+{
+    HTMLMeterElement* element = static_cast<HTMLMeterElement*>(node());
+
+    if (isHorizontal()) {
+        switch (element->gaugeRegion()) {
+        case HTMLMeterElement::GaugeRegionOptimum:
+            return METER_HORIZONTAL_OPTIMUM;
+        case HTMLMeterElement::GaugeRegionSuboptimal:
+            return METER_HORIZONTAL_SUBOPTIMAL;
+        case HTMLMeterElement::GaugeRegionEvenLessGood:
+            return METER_HORIZONTAL_EVEN_LESS_GOOD;
+        }
+    } else {
+        switch (element->gaugeRegion()) {
+        case HTMLMeterElement::GaugeRegionOptimum:
+            return METER_VERTICAL_OPTIMUM;
+        case HTMLMeterElement::GaugeRegionSuboptimal:
+            return METER_VERTICAL_SUBOPTIMAL;
+        case HTMLMeterElement::GaugeRegionEvenLessGood:
+            return METER_VERTICAL_EVEN_LESS_GOOD;
+        }
+    }
+
+    ASSERT_NOT_REACHED();
+    return NOPSEUDO;
+}
+
+PseudoId RenderMeter::barPseudoId() const
+{
+    return isHorizontal() ? METER_HORIZONTAL_BAR : METER_VERTICAL_BAR;
+}
+
+void RenderMeter::updatePartsState()
+{
+    if (shouldHaveParts() && !m_barPart) {
+        ASSERT(!m_valuePart);
+        m_barPart = ShadowBlockElement::createForPart(this->node(), barPseudoId());
+        addChild(m_barPart->renderer());
+        m_valuePart = ShadowBlockElement::createForPart(this->node(), valuePseudoId());
+        addChild(m_valuePart->renderer());
+    } else if (!shouldHaveParts() && m_barPart) {
+        ASSERT(m_valuePart);
+        m_barPart->detach();
+        m_barPart = 0;
+        m_valuePart->detach();
+        m_valuePart = 0;
+    }
+
+    if (m_barPart) {
+        ASSERT(m_valuePart);
+        m_barPart->updateStyleForPart(barPseudoId());
+        m_valuePart->updateStyleForPart(valuePseudoId());
+    }
+}
+
+} // namespace WebCore
+
+#endif