dom/html/HTMLBodyElement.h
author Nicholas Nethercote <nnethercote@mozilla.com>
Fri, 03 Mar 2017 15:32:11 +1100
changeset 374836 4e196d802c7be7f3a3c147cc6c5b6406656584b1
parent 370542 7870b72807809a9ce4fb0165f9b10fdcb1f78aba
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 HTMLBodyElement_h___
#define HTMLBodyElement_h___

#include "mozilla/Attributes.h"
#include "nsGenericHTMLElement.h"
#include "nsIDOMHTMLBodyElement.h"
#include "nsIStyleRule.h"

namespace mozilla {
namespace dom {

class OnBeforeUnloadEventHandlerNonNull;
class HTMLBodyElement;

class BodyRule: public nsIStyleRule
{
  virtual ~BodyRule();

public:
  explicit BodyRule(HTMLBodyElement* aPart);

  NS_DECL_ISUPPORTS

  // nsIStyleRule interface
  virtual void MapRuleInfoInto(nsRuleData* aRuleData) override;
  virtual bool MightMapInheritedStyleData() override;
  virtual bool GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty,
                                             nsCSSValue* aValue) override;
#ifdef DEBUG
  virtual void List(FILE* out = stdout, int32_t aIndent = 0) const override;
#endif

  HTMLBodyElement*  mPart;  // not ref-counted, cleared by content 
};

class HTMLBodyElement final : public nsGenericHTMLElement,
                              public nsIDOMHTMLBodyElement
{
public:
  using Element::GetText;
  using Element::SetText;

  explicit HTMLBodyElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
    : nsGenericHTMLElement(aNodeInfo)
  {
  }

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsIDOMHTMLBodyElement
  NS_DECL_NSIDOMHTMLBODYELEMENT

  // Event listener stuff; we need to declare only the ones we need to
  // forward to window that don't come from nsIDOMHTMLBodyElement.
#define EVENT(name_, id_, type_, struct_) /* nothing; handled by the shim */
#define WINDOW_EVENT_HELPER(name_, type_)                               \
  type_* GetOn##name_();                                                \
  void SetOn##name_(type_* handler);
#define WINDOW_EVENT(name_, id_, type_, struct_)                        \
  WINDOW_EVENT_HELPER(name_, EventHandlerNonNull)
#define BEFOREUNLOAD_EVENT(name_, id_, type_, struct_)                  \
  WINDOW_EVENT_HELPER(name_, OnBeforeUnloadEventHandlerNonNull)
#include "mozilla/EventNameList.h" // IWYU pragma: keep
#undef BEFOREUNLOAD_EVENT
#undef WINDOW_EVENT
#undef WINDOW_EVENT_HELPER
#undef EVENT

  void GetText(DOMString& aText)
  {
    GetHTMLAttr(nsGkAtoms::text, aText);
  }
  void SetText(const nsAString& aText, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::text, aText, aError);
  }
  void GetLink(DOMString& aLink)
  {
    GetHTMLAttr(nsGkAtoms::link, aLink);
  }
  void SetLink(const nsAString& aLink, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::link, aLink, aError);
  }
  void GetVLink(DOMString& aVLink)
  {
    GetHTMLAttr(nsGkAtoms::vlink, aVLink);
  }
  void SetVLink(const nsAString& aVLink, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::vlink, aVLink, aError);
  }
  void GetALink(DOMString& aALink)
  {
    GetHTMLAttr(nsGkAtoms::alink, aALink);
  }
  void SetALink(const nsAString& aALink, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::alink, aALink, aError);
  }
  void GetBgColor(DOMString& aBgColor)
  {
    GetHTMLAttr(nsGkAtoms::bgcolor, aBgColor);
  }
  void SetBgColor(const nsAString& aBgColor, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::bgcolor, aBgColor, aError);
  }
  void GetBackground(DOMString& aBackground)
  {
    GetHTMLAttr(nsGkAtoms::background, aBackground);
  }
  void SetBackground(const nsAString& aBackground, ErrorResult& aError)
  {
    SetHTMLAttr(nsGkAtoms::background, aBackground, aError);
  }

  virtual bool ParseAttribute(int32_t aNamespaceID,
                              nsIAtom* aAttribute,
                              const nsAString& aValue,
                              nsAttrValue& aResult) override;
  virtual void UnbindFromTree(bool aDeep = true,
                              bool aNullParent = true) override;
  virtual nsMapRuleToAttributesFunc GetAttributeMappingFunction() const override;
  NS_IMETHOD WalkContentStyleRules(nsRuleWalker* aRuleWalker) override;
  NS_IMETHOD_(bool) IsAttributeMapped(const nsIAtom* aAttribute) const override;
  virtual already_AddRefed<nsIEditor> GetAssociatedEditor() override;
  virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const override;

  virtual bool IsEventAttributeName(nsIAtom* aName) override;

protected:
  virtual ~HTMLBodyElement();

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

  RefPtr<BodyRule> mContentStyleRule;

private:
  static void MapAttributesIntoRule(const nsMappedAttributes* aAttributes,
                                    GenericSpecifiedValues* aGenericData);
};

} // namespace dom
} // namespace mozilla

#endif /* HTMLBodyElement_h___ */