1 files changed, 266 insertions, 0 deletions
diff --git a/dom/html/HTMLMeterElement.cpp b/dom/html/HTMLMeterElement.cpp
new file mode 100644
index 000000000..dd0e21470
--- /dev/null
+++ b/dom/html/HTMLMeterElement.cpp
@@ -0,0 +1,266 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "HTMLMeterElement.h"
+#include "mozilla/EventStates.h"
+#include "mozilla/dom/HTMLMeterElementBinding.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(Meter)
+
+namespace mozilla {
+namespace dom {
+
+const double HTMLMeterElement::kDefaultValue =  0.0;
+const double HTMLMeterElement::kDefaultMin   =  0.0;
+const double HTMLMeterElement::kDefaultMax   =  1.0;
+
+
+HTMLMeterElement::HTMLMeterElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
+  : nsGenericHTMLElement(aNodeInfo)
+{
+}
+
+HTMLMeterElement::~HTMLMeterElement()
+{
+}
+
+NS_IMPL_ELEMENT_CLONE(HTMLMeterElement)
+
+EventStates
+HTMLMeterElement::IntrinsicState() const
+{
+  EventStates state = nsGenericHTMLElement::IntrinsicState();
+
+  state |= GetOptimumState();
+
+  return state;
+}
+
+bool
+HTMLMeterElement::ParseAttribute(int32_t aNamespaceID, nsIAtom* aAttribute,
+                                 const nsAString& aValue, nsAttrValue& aResult)
+{
+  if (aNamespaceID == kNameSpaceID_None) {
+    if (aAttribute == nsGkAtoms::value || aAttribute == nsGkAtoms::max ||
+        aAttribute == nsGkAtoms::min   || aAttribute == nsGkAtoms::low ||
+        aAttribute == nsGkAtoms::high  || aAttribute == nsGkAtoms::optimum) {
+      return aResult.ParseDoubleValue(aValue);
+    }
+  }
+
+  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute,
+                                                  aValue, aResult);
+}
+
+/*
+ * Value getters :
+ * const getters used by XPCOM methods and by IntrinsicState
+ */
+
+double
+HTMLMeterElement::Min() const
+{
+  /**
+   * If the attribute min is defined, the minimum is this value.
+   * Otherwise, the minimum is the default value.
+   */
+  const nsAttrValue* attrMin = mAttrsAndChildren.GetAttr(nsGkAtoms::min);
+  if (attrMin && attrMin->Type() == nsAttrValue::eDoubleValue) {
+    return attrMin->GetDoubleValue();
+  }
+  return kDefaultMin;
+}
+
+double
+HTMLMeterElement::Max() const
+{
+  /**
+   * If the attribute max is defined, the maximum is this value.
+   * Otherwise, the maximum is the default value.
+   * If the maximum value is less than the minimum value,
+   * the maximum value is the same as the minimum value.
+   */
+  double max;
+
+  const nsAttrValue* attrMax = mAttrsAndChildren.GetAttr(nsGkAtoms::max);
+  if (attrMax && attrMax->Type() == nsAttrValue::eDoubleValue) {
+    max = attrMax->GetDoubleValue();
+  } else {
+    max = kDefaultMax;
+  }
+
+  return std::max(max, Min());
+}
+
+double
+HTMLMeterElement::Value() const
+{
+  /**
+   * If the attribute value is defined, the actual value is this value.
+   * Otherwise, the actual value is the default value.
+   * If the actual value is less than the minimum value,
+   * the actual value is the same as the minimum value.
+   * If the actual value is greater than the maximum value,
+   * the actual value is the same as the maximum value.
+   */
+  double value;
+
+  const nsAttrValue* attrValue = mAttrsAndChildren.GetAttr(nsGkAtoms::value);
+  if (attrValue && attrValue->Type() == nsAttrValue::eDoubleValue) {
+    value = attrValue->GetDoubleValue();
+  } else {
+    value = kDefaultValue;
+  }
+
+  double min = Min();
+
+  if (value <= min) {
+    return min;
+  }
+
+  return std::min(value, Max());
+}
+
+double
+HTMLMeterElement::Low() const
+{
+  /**
+   * If the low value is defined, the low value is this value.
+   * Otherwise, the low value is the minimum value.
+   * If the low value is less than the minimum value,
+   * the low value is the same as the minimum value.
+   * If the low value is greater than the maximum value,
+   * the low value is the same as the maximum value.
+   */
+
+  double min = Min();
+
+  const nsAttrValue* attrLow = mAttrsAndChildren.GetAttr(nsGkAtoms::low);
+  if (!attrLow || attrLow->Type() != nsAttrValue::eDoubleValue) {
+    return min;
+  }
+
+  double low = attrLow->GetDoubleValue();
+
+  if (low <= min) {
+    return min;
+  }
+
+  return std::min(low, Max());
+}
+
+double
+HTMLMeterElement::High() const
+{
+  /**
+   * If the high value is defined, the high value is this value.
+   * Otherwise, the high value is the maximum value.
+   * If the high value is less than the low value,
+   * the high value is the same as the low value.
+   * If the high value is greater than the maximum value,
+   * the high value is the same as the maximum value.
+   */
+
+  double max = Max();
+
+  const nsAttrValue* attrHigh = mAttrsAndChildren.GetAttr(nsGkAtoms::high);
+  if (!attrHigh || attrHigh->Type() != nsAttrValue::eDoubleValue) {
+    return max;
+  }
+
+  double high = attrHigh->GetDoubleValue();
+
+  if (high >= max) {
+    return max;
+  }
+
+  return std::max(high, Low());
+}
+
+double
+HTMLMeterElement::Optimum() const
+{
+  /**
+   * If the optimum value is defined, the optimum value is this value.
+   * Otherwise, the optimum value is the midpoint between
+   * the minimum value and the maximum value :
+   * min + (max - min)/2 = (min + max)/2
+   * If the optimum value is less than the minimum value,
+   * the optimum value is the same as the minimum value.
+   * If the optimum value is greater than the maximum value,
+   * the optimum value is the same as the maximum value.
+   */
+
+  double max = Max();
+
+  double min = Min();
+
+  const nsAttrValue* attrOptimum =
+              mAttrsAndChildren.GetAttr(nsGkAtoms::optimum);
+  if (!attrOptimum || attrOptimum->Type() != nsAttrValue::eDoubleValue) {
+    return (min + max) / 2.0;
+  }
+
+  double optimum = attrOptimum->GetDoubleValue();
+
+  if (optimum <= min) {
+    return min;
+  }
+
+  return std::min(optimum, max);
+}
+
+EventStates
+HTMLMeterElement::GetOptimumState() const
+{
+  /*
+   * If the optimum value is in [minimum, low[,
+   *     return if the value is in optimal, suboptimal or sub-suboptimal region
+   *
+   * If the optimum value is in [low, high],
+   *     return if the value is in optimal or suboptimal region
+   *
+   * If the optimum value is in ]high, maximum],
+   *     return if the value is in optimal, suboptimal or sub-suboptimal region
+   */
+  double value = Value();
+  double low = Low();
+  double high = High();
+  double optimum = Optimum();
+
+  if (optimum < low) {
+    if (value < low) {
+      return NS_EVENT_STATE_OPTIMUM;
+    }
+    if (value <= high) {
+      return NS_EVENT_STATE_SUB_OPTIMUM;
+    }
+    return NS_EVENT_STATE_SUB_SUB_OPTIMUM;
+  }
+  if (optimum > high) {
+    if (value > high) {
+      return NS_EVENT_STATE_OPTIMUM;
+    }
+    if (value >= low) {
+      return NS_EVENT_STATE_SUB_OPTIMUM;
+    }
+    return NS_EVENT_STATE_SUB_SUB_OPTIMUM;
+  }
+  // optimum in [low, high]
+  if (value >= low && value <= high) {
+    return NS_EVENT_STATE_OPTIMUM;
+  }
+  return NS_EVENT_STATE_SUB_OPTIMUM;
+}
+
+JSObject*
+HTMLMeterElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return HTMLMeterElementBinding::Wrap(aCx, this, aGivenProto);
+}
+
+} // namespace dom
+} // namespace mozilla