author Nika Layzell <>
Thu, 06 Aug 2020 14:04:13 +0000
changeset 544125 ee09cb88af177571304759bc05c760e3d82fd1ed
parent 538158 3f8100fb74318f9e0b3b6351ade737994d13bcf8
permissions -rw-r--r--
Bug 1656854 - Part 2: Add a BrowsingContextGroup keepalive to BrowserParent shutdown, r=farre In bug 1652085, I added BrowsingContextGroup keepalives while waiting for replies to the discard message, however that message isn't actually sent to the current owner process. Instead, the BrowsingContext is discarded by the PBrowser being destroyed. This should help ensure we also keep the group alive during normal BrowserParent destruction. Differential Revision:

/* -*- 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 */

#include "nsCOMPtr.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/XULTooltipElement.h"
#include "mozilla/dom/NodeInfo.h"
#include "nsCTooltipTextProvider.h"
#include "nsITooltipTextProvider.h"

namespace mozilla {
namespace dom {

nsXULElement* NS_NewXULTooltipElement(
    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo) {
  RefPtr<mozilla::dom::NodeInfo> nodeInfo(aNodeInfo);
  auto* nim = nodeInfo->NodeInfoManager();
  RefPtr<XULTooltipElement> tooltip =
      new (nim) XULTooltipElement(nodeInfo.forget());
  NS_ENSURE_SUCCESS(tooltip->Init(), nullptr);
  return tooltip;

nsresult XULTooltipElement::Init() {
  // Create the default child label node that will contain the text of the
  // tooltip.
  RefPtr<mozilla::dom::NodeInfo> nodeInfo;
  nodeInfo = mNodeInfo->NodeInfoManager()->GetNodeInfo(
      nsGkAtoms::description, nullptr, kNameSpaceID_XUL, nsINode::ELEMENT_NODE);
  nsCOMPtr<Element> description;
  nsresult rv = NS_NewXULElement(getter_AddRefs(description), nodeInfo.forget(),
  description->SetAttr(kNameSpaceID_None, nsGkAtoms::_class,
                       u"tooltip-label"_ns, false);
  description->SetAttr(kNameSpaceID_None, nsGkAtoms::flex, u"true"_ns, false);
  ErrorResult error;
  AppendChild(*description, error);

  return error.StealNSResult();

nsresult XULTooltipElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
                                         const nsAttrValue* aValue,
                                         const nsAttrValue* aOldValue,
                                         nsIPrincipal* aSubjectPrincipal,
                                         bool aNotify) {
  if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::label) {
    // When the label attribute of this node changes propagate the text down
    // into child description element.
    nsCOMPtr<nsIContent> description = GetFirstChild();
    if (description && description->IsXULElement(nsGkAtoms::description)) {
      nsAutoString value;
      if (aValue) {
          "XULTooltipElement::AfterSetAttr", [description, value]() {
            Element* descriptionElement = description->AsElement();
            descriptionElement->SetTextContent(value, IgnoreErrors());
  return nsXULElement::AfterSetAttr(aNameSpaceID, aName, aValue, aOldValue,
                                    aSubjectPrincipal, aNotify);

nsresult XULTooltipElement::PostHandleEvent(EventChainPostVisitor& aVisitor) {
  if (aVisitor.mEvent->mMessage == eXULPopupShowing &&
      aVisitor.mEvent->IsTrusted() && !aVisitor.mEvent->DefaultPrevented() &&
      AttrValueIs(kNameSpaceID_None, nsGkAtoms::page, nsGkAtoms::_true,
                  eCaseMatters)) {
    // When the tooltip node has the "page" attribute set to "true" the
    // tooltip text provider is used to find the tooltip text from page where
    // mouse is hovering over.
    nsCOMPtr<nsITooltipTextProvider> textProvider =
    nsString text;
    nsString direction;
    bool shouldChange = false;
    if (textProvider) {
      textProvider->GetNodeText(GetTriggerNode(), getter_Copies(text),
                                getter_Copies(direction), &shouldChange);
    if (shouldChange) {
      SetAttr(kNameSpaceID_None, nsGkAtoms::label, text, true);
      SetAttr(kNameSpaceID_None, nsGkAtoms::direction, direction, true);
    } else {
      aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
  return NS_OK;

}  // namespace dom
}  // namespace mozilla