Merge 73488

WebCore/rendering/RenderMeter.cpp

 /*
  * 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
@@ skipping 17 matching lines @@
 #include "HTMLNames.h"
 #include "RenderTheme.h"
 #include "ShadowElement.h"
 
 using namespace std;
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
+class MeterPartElement : public ShadowBlockElement {
+public:
+    static PassRefPtr<MeterPartElement> createForPart(HTMLElement*, PseudoId);
+
+    void hide();
+    void restoreVisibility();
+
+    virtual void updateStyleForPart(PseudoId);
+
+private:
+    MeterPartElement(HTMLElement*);
+    void saveVisibility();
+
+    EVisibility m_originalVisibility;
+};
+
+MeterPartElement::MeterPartElement(HTMLElement* shadowParent)
+    : ShadowBlockElement(shadowParent)
+{
+}
+
+PassRefPtr<MeterPartElement> MeterPartElement::createForPart(HTMLElement* shadowParent, PseudoId pseudoId)
+{
+    RefPtr<MeterPartElement> ret = adoptRef(new MeterPartElement(shadowParent));
+    ret->initAsPart(pseudoId);
+    ret->saveVisibility();
+    return ret;
+}
+
+void MeterPartElement::hide()
+{
+    if (renderer())
+        renderer()->style()->setVisibility(HIDDEN);
+}
+
+void MeterPartElement::restoreVisibility()
+{
+    if (renderer())
+        renderer()->style()->setVisibility(m_originalVisibility);
+}
+
+void MeterPartElement::updateStyleForPart(PseudoId pseudoId)
+{
+    if (renderer()->style()->styleType() == pseudoId)
+        return;
+
+    ShadowBlockElement::updateStyleForPart(pseudoId);
+    saveVisibility();
+}
+
+void MeterPartElement::saveVisibility()
+{
+    m_originalVisibility = renderer()->style()->visibility();
+}
+
 RenderMeter::RenderMeter(HTMLMeterElement* element)
     : RenderIndicator(element)
 {
 }
 
 RenderMeter::~RenderMeter()
 {
-    if (m_valuePart)
-        m_valuePart->detach();
-    if (m_barPart)
-        m_barPart->detach();
+    if (shadowAttached()) {
+        m_verticalValuePart->detach();
+        m_verticalBarPart->detach();
+        m_horizontalValuePart->detach();
+        m_horizontalBarPart->detach();
+    }
+}
+
+PassRefPtr<MeterPartElement> RenderMeter::createPart(PseudoId pseudoId)
+{
+    RefPtr<MeterPartElement> element = MeterPartElement::createForPart(static_cast<HTMLElement*>(node()), pseudoId);
+    if (element->renderer())
+        addChild(element->renderer());
+    return element;
+}
+
+void RenderMeter::updateFromElement()
+{
+    if (!shadowAttached()) {
+        m_horizontalBarPart = createPart(barPseudoId(HORIZONTAL));
+        m_horizontalValuePart = createPart(valuePseudoId(HORIZONTAL));
+        m_verticalBarPart = createPart(barPseudoId(VERTICAL));
+        m_verticalValuePart = createPart(valuePseudoId(VERTICAL));
+    }
+
+    m_horizontalBarPart->updateStyleForPart(barPseudoId(HORIZONTAL));
+    m_horizontalValuePart->updateStyleForPart(valuePseudoId(HORIZONTAL));
+    m_verticalBarPart->updateStyleForPart(barPseudoId(VERTICAL));
+    m_verticalValuePart->updateStyleForPart(valuePseudoId(VERTICAL));
+    RenderIndicator::updateFromElement();
 }
 
 void RenderMeter::computeLogicalWidth()
 {
     RenderBox::computeLogicalWidth();
     setWidth(theme()->meterSizeForBounds(this, frameRect()).width());
 }
 
 void RenderMeter::computeLogicalHeight()
 {
     RenderBox::computeLogicalHeight();
     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());
+    m_horizontalBarPart->layoutAsPart(barPartRect());
+    m_horizontalValuePart->layoutAsPart(valuePartRect(HORIZONTAL));
+    m_verticalBarPart->layoutAsPart(barPartRect());
+    m_verticalValuePart->layoutAsPart(valuePartRect(VERTICAL));
+
+    if (shouldHaveParts()) {
+        if (HORIZONTAL == orientation()) {
+            m_verticalBarPart->hide();
+            m_verticalValuePart->hide();
+            m_horizontalBarPart->restoreVisibility();
+            m_horizontalValuePart->restoreVisibility();
+        } else {
+            m_verticalBarPart->restoreVisibility();
+            m_verticalValuePart->restoreVisibility();
+            m_horizontalBarPart->hide();
+            m_horizontalValuePart->hide();
+        }
+    } else {
+        m_verticalBarPart->hide();
+        m_verticalValuePart->hide();
+        m_horizontalBarPart->hide();
+        m_horizontalValuePart->hide();
+    }
 }
 
 bool RenderMeter::shouldHaveParts() const
 {
-    bool hasTheme = theme()->supportsMeter(style()->appearance(), isHorizontal());
+    EBoxOrient currentOrientation = orientation();
+    bool hasTheme = theme()->supportsMeter(style()->appearance(), HORIZONTAL == currentOrientation);
     if (!hasTheme)
         return true;
-    bool shadowsHaveStyle = ShadowBlockElement::partShouldHaveStyle(this, barPseudoId()) || ShadowBlockElement::partShouldHaveStyle(this, valuePseudoId());
+    bool shadowsHaveStyle = ShadowBlockElement::partShouldHaveStyle(this, barPseudoId(currentOrientation)) || ShadowBlockElement::partShouldHaveStyle(this, valuePseudoId(currentOrientation));
     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 RenderMeter::valuePartRect(EBoxOrient asOrientation) const
 {
     IntRect rect = barPartRect();
     
-    if (rect.height() <= rect.width()) {
+    if (HORIZONTAL == asOrientation) {
         int width = static_cast<int>(rect.width()*valueRatio());
         if (!style()->isLeftToRightDirection()) {
             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
+EBoxOrient RenderMeter::orientation() const
 {
     IntRect rect = barPartRect();
-    return rect.height() <= rect.width();
+    return rect.height() <= rect.width() ? HORIZONTAL : VERTICAL;
 }
 
-PseudoId RenderMeter::valuePseudoId() const
+PseudoId RenderMeter::valuePseudoId(EBoxOrient asOrientation) const
 {
     HTMLMeterElement* element = static_cast<HTMLMeterElement*>(node());
 
-    if (isHorizontal()) {
+    if (HORIZONTAL == asOrientation) {
         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
+PseudoId RenderMeter::barPseudoId(EBoxOrient asOrientation) const
 {
-    return isHorizontal() ? METER_HORIZONTAL_BAR : METER_VERTICAL_BAR;
-}
-
-void RenderMeter::updatePartsState()
-{
-    if (shouldHaveParts() && !m_barPart) {
-        ASSERT(!m_valuePart);
-        m_barPart = ShadowBlockElement::createForPart(static_cast<HTMLElement*>(node()), barPseudoId());
-        addChild(m_barPart->renderer());
-        m_valuePart = ShadowBlockElement::createForPart(static_cast<HTMLElement*>(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());
-    }
+    return HORIZONTAL == asOrientation ? METER_HORIZONTAL_BAR : METER_VERTICAL_BAR;
 }
 
 } // namespace WebCore
 
 #endif