dom/html/HTMLProgressElement.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/EventStates.h"
   8 #include "mozilla/dom/HTMLProgressElement.h"
   9 #include "mozilla/dom/HTMLProgressElementBinding.h"
  10
  11 NS_IMPL_NS_NEW_HTML_ELEMENT(Progress)
  12
  13 namespace mozilla {
  14 namespace dom {
  15
  16 const double HTMLProgressElement::kIndeterminatePosition = -1.0;
  17 const double HTMLProgressElement::kDefaultValue = 0.0;
  18 const double HTMLProgressElement::kDefaultMax = 1.0;
  19
  20 HTMLProgressElement::HTMLProgressElement(
  21     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
  22     : nsGenericHTMLElement(std::move(aNodeInfo)) {
  23   // We start out indeterminate
  24   AddStatesSilently(NS_EVENT_STATE_INDETERMINATE);
  25 }
  26
  27 HTMLProgressElement::~HTMLProgressElement() = default;
  28
  29 NS_IMPL_ELEMENT_CLONE(HTMLProgressElement)
  30
  31 EventStates HTMLProgressElement::IntrinsicState() const {
  32   EventStates state = nsGenericHTMLElement::IntrinsicState();
  33
  34   if (IsIndeterminate()) {
  35     state |= NS_EVENT_STATE_INDETERMINATE;
  36   }
  37
  38   return state;
  39 }
  40
  41 bool HTMLProgressElement::ParseAttribute(int32_t aNamespaceID,
  42                                          nsAtom* aAttribute,
  43                                          const nsAString& aValue,
  44                                          nsIPrincipal* aMaybeScriptedPrincipal,
  45                                          nsAttrValue& aResult) {
  46   if (aNamespaceID == kNameSpaceID_None) {
  47     if (aAttribute == nsGkAtoms::value || aAttribute == nsGkAtoms::max) {
  48       return aResult.ParseDoubleValue(aValue);
  49     }
  50   }
  51
  52   return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
  53                                               aMaybeScriptedPrincipal, aResult);
  54 }
  55
  56 double HTMLProgressElement::Value() const {
  57   const nsAttrValue* attrValue = mAttrs.GetAttr(nsGkAtoms::value);
  58   if (!attrValue || attrValue->Type() != nsAttrValue::eDoubleValue ||
  59       attrValue->GetDoubleValue() < 0.0) {
  60     return kDefaultValue;
  61   }
  62
  63   return std::min(attrValue->GetDoubleValue(), Max());
  64 }
  65
  66 double HTMLProgressElement::Max() const {
  67   const nsAttrValue* attrMax = mAttrs.GetAttr(nsGkAtoms::max);
  68   if (!attrMax || attrMax->Type() != nsAttrValue::eDoubleValue ||
  69       attrMax->GetDoubleValue() <= 0.0) {
  70     return kDefaultMax;
  71   }
  72
  73   return attrMax->GetDoubleValue();
  74 }
  75
  76 double HTMLProgressElement::Position() const {
  77   if (IsIndeterminate()) {
  78     return kIndeterminatePosition;
  79   }
  80
  81   return Value() / Max();
  82 }
  83
  84 bool HTMLProgressElement::IsIndeterminate() const {
  85   const nsAttrValue* attrValue = mAttrs.GetAttr(nsGkAtoms::value);
  86   return !attrValue || attrValue->Type() != nsAttrValue::eDoubleValue;
  87 }
  88
  89 JSObject* HTMLProgressElement::WrapNode(JSContext* aCx,
  90                                         JS::Handle<JSObject*> aGivenProto) {
  91   return HTMLProgressElement_Binding::Wrap(aCx, this, aGivenProto);
  92 }
  93
  94 }  // namespace dom
  95 }  // namespace mozilla