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/dom/HTMLProgressElement.h"
   8 #include "mozilla/dom/HTMLProgressElementBinding.h"
   9
  10 NS_IMPL_NS_NEW_HTML_ELEMENT(Progress)
  11
  12 namespace mozilla::dom {
  13
  14 HTMLProgressElement::HTMLProgressElement(
  15     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
  16     : nsGenericHTMLElement(std::move(aNodeInfo)) {
  17   // We start out indeterminate
  18   AddStatesSilently(ElementState::INDETERMINATE);
  19 }
  20
  21 HTMLProgressElement::~HTMLProgressElement() = default;
  22
  23 NS_IMPL_ELEMENT_CLONE(HTMLProgressElement)
  24
  25 bool HTMLProgressElement::ParseAttribute(int32_t aNamespaceID,
  26                                          nsAtom* aAttribute,
  27                                          const nsAString& aValue,
  28                                          nsIPrincipal* aMaybeScriptedPrincipal,
  29                                          nsAttrValue& aResult) {
  30   if (aNamespaceID == kNameSpaceID_None) {
  31     if (aAttribute == nsGkAtoms::value || aAttribute == nsGkAtoms::max) {
  32       return aResult.ParseDoubleValue(aValue);
  33     }
  34   }
  35
  36   return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
  37                                               aMaybeScriptedPrincipal, aResult);
  38 }
  39
  40 void HTMLProgressElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
  41                                        const nsAttrValue* aValue,
  42                                        const nsAttrValue* aOldValue,
  43                                        nsIPrincipal* aSubjectPrincipal,
  44                                        bool aNotify) {
  45   if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::value) {
  46     const bool indeterminate =
  47         !aValue || aValue->Type() != nsAttrValue::eDoubleValue;
  48     SetStates(ElementState::INDETERMINATE, indeterminate, aNotify);
  49   }
  50   return nsGenericHTMLElement::AfterSetAttr(
  51       aNameSpaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
  52 }
  53
  54 double HTMLProgressElement::Value() const {
  55   const nsAttrValue* attrValue = mAttrs.GetAttr(nsGkAtoms::value);
  56   if (!attrValue || attrValue->Type() != nsAttrValue::eDoubleValue ||
  57       attrValue->GetDoubleValue() < 0.0) {
  58     return 0.0;
  59   }
  60
  61   return std::min(attrValue->GetDoubleValue(), Max());
  62 }
  63
  64 double HTMLProgressElement::Max() const {
  65   const nsAttrValue* attrMax = mAttrs.GetAttr(nsGkAtoms::max);
  66   if (!attrMax || attrMax->Type() != nsAttrValue::eDoubleValue ||
  67       attrMax->GetDoubleValue() <= 0.0) {
  68     return 1.0;
  69   }
  70
  71   return attrMax->GetDoubleValue();
  72 }
  73
  74 double HTMLProgressElement::Position() const {
  75   if (State().HasState(ElementState::INDETERMINATE)) {
  76     return -1.0;
  77   }
  78
  79   return Value() / Max();
  80 }
  81
  82 JSObject* HTMLProgressElement::WrapNode(JSContext* aCx,
  83                                         JS::Handle<JSObject*> aGivenProto) {
  84   return HTMLProgressElement_Binding::Wrap(aCx, this, aGivenProto);
  85 }
  86
  87 }  // namespace mozilla::dom