dom/html/HTMLFieldSetElement.h
author Nicholas Nethercote <nnethercote@mozilla.com>
Fri, 03 Mar 2017 15:32:11 +1100
changeset 374836 4e196d802c7be7f3a3c147cc6c5b6406656584b1
parent 371690 2823220fff5ef2515da52266205d6e218a76bc46
permissions -rw-r--r--
Bug 1344118 - Fix the profiler's sleeping threads optimization. r=jseward. When ProfilerBuffer::reset() is called, DuplicateLastSample() will start failing for all sleeping threads because there will be no prior thread data in the buffer to duplicate. But the sampling loop doesn't detect such failure. This causes two problems: - Missing samples. - CPU usage goes through the roof, because each time around the sampling loop the length of the failing search increases. The fix is simple: detect failure in the sampling loop and do a normal sample in that case. The patch also removes ThreadInfo::DuplicateLastSample(), because it just calls onto ProfileBuffer::DuplicateLastSample().

/* -*- 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/. */

#ifndef mozilla_dom_HTMLFieldSetElement_h
#define mozilla_dom_HTMLFieldSetElement_h

#include "mozilla/Attributes.h"
#include "nsGenericHTMLElement.h"
#include "nsIDOMHTMLFieldSetElement.h"
#include "nsIConstraintValidation.h"
#include "mozilla/dom/HTMLFormElement.h"
#include "mozilla/dom/ValidityState.h"

namespace mozilla {
class EventChainPreVisitor;
namespace dom {

class HTMLFieldSetElement final : public nsGenericHTMLFormElement,
                                  public nsIDOMHTMLFieldSetElement,
                                  public nsIConstraintValidation
{
public:
  using nsGenericHTMLFormElement::GetForm;
  using nsIConstraintValidation::Validity;
  using nsIConstraintValidation::CheckValidity;
  using nsIConstraintValidation::ReportValidity;
  using nsIConstraintValidation::GetValidationMessage;

  explicit HTMLFieldSetElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo);

  NS_IMPL_FROMCONTENT_HTML_WITH_TAG(HTMLFieldSetElement, fieldset)

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsIDOMHTMLFieldSetElement
  NS_DECL_NSIDOMHTMLFIELDSETELEMENT

  // nsIContent
  virtual nsresult GetEventTargetParent(
                     EventChainPreVisitor& aVisitor) override;
  virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
                                const nsAttrValue* aValue, bool aNotify) override;

  virtual nsresult InsertChildAt(nsIContent* aChild, uint32_t aIndex,
                                     bool aNotify) override;
  virtual void RemoveChildAt(uint32_t aIndex, bool aNotify) override;

  // nsIFormControl
  NS_IMETHOD_(uint32_t) GetType() const override { return NS_FORM_FIELDSET; }
  NS_IMETHOD Reset() override;
  NS_IMETHOD SubmitNamesValues(HTMLFormSubmission* aFormSubmission) override;
  virtual bool IsDisabledForEvents(EventMessage aMessage) override;
  virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const override;

  const nsIContent* GetFirstLegend() const { return mFirstLegend; }

  void AddElement(nsGenericHTMLFormElement* aElement);

  void RemoveElement(nsGenericHTMLFormElement* aElement);

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLFieldSetElement,
                                           nsGenericHTMLFormElement)

  // WebIDL
  bool Disabled() const
  {
    return GetBoolAttr(nsGkAtoms::disabled);
  }
  void SetDisabled(bool aValue, ErrorResult& aRv)
  {
    SetHTMLBoolAttr(nsGkAtoms::disabled, aValue, aRv);
  }

  // XPCOM GetName is OK for us

  void SetName(const nsAString& aValue, ErrorResult& aRv)
  {
    SetHTMLAttr(nsGkAtoms::name, aValue, aRv);
  }

  // XPCOM GetType is OK for us

  nsIHTMLCollection* Elements();

  // XPCOM WillValidate is OK for us

  // XPCOM Validity is OK for us

  // XPCOM GetValidationMessage is OK for us

  // XPCOM CheckValidity is OK for us

  // XPCOM SetCustomValidity is OK for us

  virtual EventStates IntrinsicState() const override;


  /*
   * This method will update the fieldset's validity.  This method has to be
   * called by fieldset elements whenever their validity state or status regarding
   * constraint validation changes.
   *
   * @note If an element becomes barred from constraint validation, it has to
   * be considered as valid.
   *
   * @param aElementValidityState the new validity state of the element
   */
  void UpdateValidity(bool aElementValidityState);

protected:
  virtual ~HTMLFieldSetElement();

  virtual JSObject* WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;

private:

  /**
   * Notify all elements (in mElements) that the first legend of the fieldset
   * has now changed.
   */
  void NotifyElementsForFirstLegendChange(bool aNotify);

  // This function is used to generate the nsContentList (listed form elements).
  static bool MatchListedElements(Element* aElement, int32_t aNamespaceID,
                                  nsIAtom* aAtom, void* aData);

  // listed form controls elements.
  RefPtr<nsContentList> mElements;

  // List of elements which have this fieldset as first fieldset ancestor.
  nsTArray<nsGenericHTMLFormElement*> mDependentElements;

  nsIContent* mFirstLegend;

  /**
   * Number of invalid and candidate for constraint validation
   * elements in the fieldSet the last time UpdateValidity has been called.
   *
   * @note Should only be used by UpdateValidity() and IntrinsicState()!
   */
  int32_t mInvalidElementsCount;
};

} // namespace dom
} // namespace mozilla

#endif /* mozilla_dom_HTMLFieldSetElement_h */