C++ nsAString::LowerCaseEqualsLiteral方法代码示例

// Adds the value aNewValue to the list of white-space separated values aValues
void ChangeStyleTransaction::AddValueToMultivalueProperty(
    nsAString& aValues, const nsAString& aNewValue) {
  if (aValues.IsEmpty() || aValues.LowerCaseEqualsLiteral("none")) {
    aValues.Assign(aNewValue);
  } else if (!ValueIncludes(aValues, aNewValue)) {
    // We already have another value but not this one; add it
    aValues.Append(char16_t(' '));
    aValues.Append(aNewValue);
  }
}

NS_IMETHODIMP 
nsPlatformCharset::GetDefaultCharsetForLocale(const nsAString& localeName, nsACString &oResult)
{
  // 
  // if this locale is the user's locale then use the charset 
  // we already determined at initialization
  // 
  if (mLocale.Equals(localeName) ||
    // support the 4.x behavior
    (mLocale.LowerCaseEqualsLiteral("en_us") && 
     localeName.LowerCaseEqualsLiteral("c"))) {
    oResult = mCharset;
    return NS_OK;
  }

#if HAVE_LANGINFO_CODESET
  //
  // This locale appears to be a different locale from the user's locale. 
  // To do this we would need to lock the global resource we are currently 
  // using or use a library that provides multi locale support. 
  // ICU is a possible example of a multi locale library.
  //     http://oss.software.ibm.com/icu/
  //
  // A more common cause of hitting this warning than the above is that 
  // Mozilla is launched under an ll_CC.UTF-8 locale. In xpLocale, 
  // we only store the language and the region (ll-CC) losing 'UTF-8', which
  // leads |mLocale| to be different from |localeName|. Although we lose
  // 'UTF-8', we init'd |mCharset| with the value obtained via 
  // |nl_langinfo(CODESET)| so that we're all right here.
  // 
  NS_WARNING("GetDefaultCharsetForLocale: need to add multi locale support");
#ifdef DEBUG_jungshik
  printf("localeName=%s mCharset=%s\n", NS_ConvertUTF16toUTF8(localeName).get(),
         mCharset.get());
#endif
  // until we add multi locale support: use the the charset of the user's locale
  oResult = mCharset;
  return NS_SUCCESS_USING_FALLBACK_LOCALE;
#else
  //
  // convert from locale to charset
  // using the deprecated locale to charset mapping 
  //
  nsAutoString localeStr(localeName);
  nsresult res = ConvertLocaleToCharsetUsingDeprecatedConfig(localeStr, oResult);
  if (NS_SUCCEEDED(res))
    return res;

  NS_ERROR("unable to convert locale to charset using deprecated config");
  oResult.AssignLiteral("ISO-8859-1");
  return NS_SUCCESS_USING_FALLBACK_LOCALE;
#endif
}

nsresult
TabGroup::FindItemWithName(const nsAString& aName,
                           nsIDocShellTreeItem* aRequestor,
                           nsIDocShellTreeItem* aOriginalRequestor,
                           nsIDocShellTreeItem** aFoundItem)
{
  MOZ_ASSERT(NS_IsMainThread());
  NS_ENSURE_ARG_POINTER(aFoundItem);
  *aFoundItem = nullptr;

  MOZ_ASSERT(!aName.LowerCaseEqualsLiteral("_blank") &&
             !aName.LowerCaseEqualsLiteral("_top") &&
             !aName.LowerCaseEqualsLiteral("_parent") &&
             !aName.LowerCaseEqualsLiteral("_self"));

  for (nsPIDOMWindowOuter* outerWindow : mWindows) {
    // Ignore non-toplevel windows
    if (outerWindow->GetScriptableParentOrNull()) {
      continue;
    }

    nsCOMPtr<nsIDocShellTreeItem> docshell = outerWindow->GetDocShell();
    if (!docshell) {
      continue;
    }

    nsCOMPtr<nsIDocShellTreeItem> root;
    docshell->GetSameTypeRootTreeItem(getter_AddRefs(root));
    MOZ_RELEASE_ASSERT(docshell == root);
    if (root && aRequestor != root) {
      root->FindItemWithName(aName, aRequestor, aOriginalRequestor,
                             /* aSkipTabGroup = */ true, aFoundItem);
      if (*aFoundItem) {
        break;
      }
    }
  }

  return NS_OK;
}

NS_IMETHODIMP
sbOriginPageImagePropertyInfo::GetPreventNavigation(const nsAString& aImageValue,
                                                    const nsAString& aUrlValue,
                                                    bool *_retval)
{
  NS_ENSURE_ARG_POINTER(_retval);
  
  *_retval = aImageValue.LowerCaseEqualsLiteral("unknownOrigin") ||
             aImageValue.IsEmpty() ||
             aUrlValue.IsEmpty();
  
  return NS_OK;
}

// The user agent MUST thoroughly validate the Initialization Data before
// passing it to the CDM. This includes verifying that the length and
// values of fields are reasonable, verifying that values are within
// reasonable limits, and stripping irrelevant, unsupported, or unknown
// data or fields. It is RECOMMENDED that user agents pre-parse, sanitize,
// and/or generate a fully sanitized version of the Initialization Data.
// If the Initialization Data format specified by initDataType supports
// multiple entries, the user agent SHOULD remove entries that are not
// needed by the CDM. The user agent MUST NOT re-order entries within
// the Initialization Data.
static bool
ValidateInitData(const nsTArray<uint8_t>& aInitData, const nsAString& aInitDataType)
{
  if (aInitDataType.LowerCaseEqualsLiteral("webm")) {
    // WebM initData consists of a single keyId. Ensure it's of reasonable length.
    return aInitData.Length() <= MAX_KEY_ID_LENGTH;
  } else if (aInitDataType.LowerCaseEqualsLiteral("cenc")) {
    // Limit initData to less than 64KB.
    if (aInitData.Length() > MAX_CENC_INIT_DATA_LENGTH) {
      return false;
    }
    std::vector<std::vector<uint8_t>> keyIds;
    return ParseCENCInitData(aInitData.Elements(), aInitData.Length(), keyIds);
  } else if (aInitDataType.LowerCaseEqualsLiteral("keyids")) {
    if (aInitData.Length() > MAX_KEY_ID_LENGTH) {
      return false;
    }
    // Ensure that init data matches the expected JSON format.
    mozilla::dom::KeyIdsInitData keyIds;
    nsString json;
    nsDependentCSubstring raw(reinterpret_cast<const char*>(aInitData.Elements()), aInitData.Length());
    if (NS_FAILED(nsContentUtils::ConvertStringFromEncoding(NS_LITERAL_CSTRING("UTF-8"), raw, json))) {
      return false;
    }
    if (!keyIds.Init(json)) {
      return false;
    }
    if (keyIds.mKids.Length() == 0) {
      return false;
    }
    for (const auto& kid : keyIds.mKids) {
      if (kid.IsEmpty()) {
        return false;
      }
    }
  }
  return true;
}

NS_IMETHODIMP
sbImageLinkPropertyInfo::GetImageSrc(const nsAString& aValue,
                                     nsAString& _retval)
{
  if(!aValue.IsEmpty() &&
     !aValue.LowerCaseEqualsLiteral("default")) {
    _retval = aValue;
    return NS_OK;
  }

  _retval.Truncate();

  return NS_OK;
}

// adds the value aNewValue to the list of white-space separated values aValues
NS_IMETHODIMP
ChangeCSSInlineStyleTxn::AddValueToMultivalueProperty(nsAString & aValues, const nsAString & aNewValue)
{
  if (aValues.IsEmpty()
      || aValues.LowerCaseEqualsLiteral("none")) {
    // the list of values is empty of the value is 'none'
    aValues.Assign(aNewValue);
  }
  else if (!ValueIncludes(aValues, aNewValue, false)) {
    // we already have another value but not this one; add it
    aValues.Append(PRUnichar(' '));
    aValues.Append(aNewValue);
  }
  return NS_OK;
}

/**
   Ensures basic sanity of attribute value.
   This function also (tries to :-( ) makes sure, that no
   unwanted / dangerous URLs appear in the document
   (like javascript: and data:).

   Pass the value as |aValue| arg. It will be modified in-place.

   If the value is not allowed at all, we return with NS_ERROR_ILLEGAL_VALUE.
   In that case, do not use the |aValue|, but output nothing.
 */
nsresult
mozSanitizingHTMLSerializer::SanitizeAttrValue(nsHTMLTag aTag,
                                               const nsAString& anAttrName,
                                               nsString& aValue /*inout*/)
{
  /* First, cut the attribute to 1000 chars.
     Attributes with values longer than 1000 chars seem bogus,
     considering that we don't support any JS. The longest attributes
     I can think of are URLs, and URLs with 1000 chars are likely to be
     bogus, too. */
  aValue = Substring(aValue, 0, 1000);
  //aValue.Truncate(1000); //-- this cuts half of the document !!?!!

  aValue.Adopt(escape(aValue));

  /* Check some known bad stuff. Add more!
     I don't care too much, if it happens to trigger in some innocent cases
     (like <img alt="Statistical data: Mortage rates and newspapers">) -
     security first. */
  if (aValue.Find("javascript:") != kNotFound ||
      aValue.Find("data:") != kNotFound ||
      aValue.Find("base64") != kNotFound)
    return NS_ERROR_ILLEGAL_VALUE;

  // Check img src scheme
  if (aTag == eHTMLTag_img && 
      anAttrName.LowerCaseEqualsLiteral("src"))
  {
    nsresult rv;
    nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv);
    NS_ENSURE_SUCCESS(rv, rv);
    nsCAutoString scheme;
    rv = ioService->ExtractScheme(NS_LossyConvertUTF16toASCII(aValue), scheme);
    NS_ENSURE_SUCCESS(rv, rv);

    if (!scheme.Equals("cid", nsCaseInsensitiveCStringComparator()))
      return NS_ERROR_ILLEGAL_VALUE;
  }

#ifdef DEBUG_BenB
  printf("attribute value for %s: -%s-\n",
         NS_LossyConvertUTF16toASCII(anAttrName).get(),
         NS_LossyConvertUTF16toASCII(aValue).get());
#endif

  return NS_OK;
}

PRBool CViewSourceHTML::IsUrlAttribute(const nsAString& tagName,
                                       const nsAString& attrName, 
                                       const nsAString& attrValue) {
  const nsSubstring &trimmedAttrName = TrimTokenValue(attrName);

  PRBool isHref = trimmedAttrName.LowerCaseEqualsLiteral("href");
  PRBool isSrc = !isHref && trimmedAttrName.LowerCaseEqualsLiteral("src");

  // If this is the HREF attribute of a BASE element, then update the base URI.
  // This doesn't feel like the ideal place for this, but the alternatives don't
  // seem all that nice either.
  if (isHref && tagName.LowerCaseEqualsLiteral("base")) {
    const nsAString& baseSpec = TrimTokenValue(attrValue);
    nsAutoString expandedBaseSpec;
    ExpandEntities(baseSpec, expandedBaseSpec);
    SetBaseURI(expandedBaseSpec);
  }

  return isHref || isSrc;
}

/* static */ nsresult
nsEventDispatcher::CreateEvent(mozilla::dom::EventTarget* aOwner,
                               nsPresContext* aPresContext,
                               nsEvent* aEvent,
                               const nsAString& aEventType,
                               nsIDOMEvent** aDOMEvent)
{
  *aDOMEvent = nullptr;

  if (aEvent) {
    switch(aEvent->eventStructType) {
    case NS_MUTATION_EVENT:
      return NS_NewDOMMutationEvent(aDOMEvent, aOwner, aPresContext,
                                    static_cast<nsMutationEvent*>(aEvent));
    case NS_GUI_EVENT:
    case NS_SCROLLPORT_EVENT:
    case NS_UI_EVENT:
      return NS_NewDOMUIEvent(aDOMEvent, aOwner, aPresContext,
                              static_cast<nsGUIEvent*>(aEvent));
    case NS_SCROLLAREA_EVENT:
      return NS_NewDOMScrollAreaEvent(aDOMEvent, aOwner, aPresContext,
                                      static_cast<nsScrollAreaEvent *>(aEvent));
    case NS_KEY_EVENT:
      return NS_NewDOMKeyboardEvent(aDOMEvent, aOwner, aPresContext,
                                    static_cast<nsKeyEvent*>(aEvent));
    case NS_COMPOSITION_EVENT:
      return NS_NewDOMCompositionEvent(
        aDOMEvent, aOwner,
        aPresContext, static_cast<nsCompositionEvent*>(aEvent));
    case NS_MOUSE_EVENT:
      return NS_NewDOMMouseEvent(aDOMEvent, aOwner, aPresContext,
                                 static_cast<nsInputEvent*>(aEvent));
    case NS_MOUSE_SCROLL_EVENT:
      return NS_NewDOMMouseScrollEvent(aDOMEvent, aOwner, aPresContext,
                                 static_cast<nsInputEvent*>(aEvent));
    case NS_WHEEL_EVENT:
      return NS_NewDOMWheelEvent(aDOMEvent, aOwner, aPresContext,
                                 static_cast<widget::WheelEvent*>(aEvent));
    case NS_DRAG_EVENT:
      return NS_NewDOMDragEvent(aDOMEvent, aOwner, aPresContext,
                                 static_cast<nsDragEvent*>(aEvent));
    case NS_TEXT_EVENT:
      return NS_NewDOMTextEvent(aDOMEvent, aOwner, aPresContext,
                                static_cast<nsTextEvent*>(aEvent));
    case NS_CLIPBOARD_EVENT:
      return NS_NewDOMClipboardEvent(aDOMEvent, aOwner, aPresContext,
                                     static_cast<nsClipboardEvent*>(aEvent));
    case NS_SVGZOOM_EVENT:
      return NS_NewDOMSVGZoomEvent(aDOMEvent, aOwner, aPresContext,
                                   static_cast<nsGUIEvent*>(aEvent));
    case NS_SMIL_TIME_EVENT:
      return NS_NewDOMTimeEvent(aDOMEvent, aOwner, aPresContext, aEvent);

    case NS_COMMAND_EVENT:
      return NS_NewDOMCommandEvent(aDOMEvent, aOwner, aPresContext,
                                   static_cast<nsCommandEvent*>(aEvent));
    case NS_SIMPLE_GESTURE_EVENT:
      return NS_NewDOMSimpleGestureEvent(aDOMEvent, aOwner, aPresContext,
                                         static_cast<nsSimpleGestureEvent*>(aEvent));
    case NS_TOUCH_EVENT:
      return NS_NewDOMTouchEvent(aDOMEvent, aOwner, aPresContext,
                                 static_cast<nsTouchEvent*>(aEvent));
    case NS_TRANSITION_EVENT:
      return NS_NewDOMTransitionEvent(aDOMEvent, aOwner, aPresContext,
                                      static_cast<nsTransitionEvent*>(aEvent));
    case NS_ANIMATION_EVENT:
      return NS_NewDOMAnimationEvent(aDOMEvent, aOwner, aPresContext,
                                     static_cast<nsAnimationEvent*>(aEvent));
    default:
      // For all other types of events, create a vanilla event object.
      return NS_NewDOMEvent(aDOMEvent, aOwner, aPresContext, aEvent);
    }
  }

  // And if we didn't get an event, check the type argument.

  if (aEventType.LowerCaseEqualsLiteral("mouseevent") ||
      aEventType.LowerCaseEqualsLiteral("mouseevents") ||
      aEventType.LowerCaseEqualsLiteral("popupevents"))
    return NS_NewDOMMouseEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("mousescrollevents"))
    return NS_NewDOMMouseScrollEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("dragevent") ||
      aEventType.LowerCaseEqualsLiteral("dragevents"))
    return NS_NewDOMDragEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("keyboardevent") ||
      aEventType.LowerCaseEqualsLiteral("keyevents"))
    return NS_NewDOMKeyboardEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("compositionevent"))
    return NS_NewDOMCompositionEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("mutationevent") ||
        aEventType.LowerCaseEqualsLiteral("mutationevents"))
    return NS_NewDOMMutationEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("textevent") ||
      aEventType.LowerCaseEqualsLiteral("textevents"))
    return NS_NewDOMTextEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("popupblockedevents"))
    return NS_NewDOMPopupBlockedEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("deviceorientationevent"))
    return NS_NewDOMDeviceOrientationEvent(aDOMEvent, aOwner, aPresContext, nullptr);
//.........这里部分代码省略.........

bool nsDSURIContentListener::CheckOneFrameOptionsPolicy(nsIRequest *request,
                                                        const nsAString& policy) {
    static const char allowFrom[] = "allow-from ";
    const uint32_t allowFromLen = ArrayLength(allowFrom) - 1;
    bool isAllowFrom =
        StringHead(policy, allowFromLen).LowerCaseEqualsLiteral(allowFrom);

    // return early if header does not have one of the values with meaning
    if (!policy.LowerCaseEqualsLiteral("deny") &&
        !policy.LowerCaseEqualsLiteral("sameorigin") &&
        !isAllowFrom)
        return true;

    nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(request);
    if (!httpChannel) {
        return true;
    }

    if (mDocShell) {
        // We need to check the location of this window and the location of the top
        // window, if we're not the top.  X-F-O: SAMEORIGIN requires that the
        // document must be same-origin with top window.  X-F-O: DENY requires that
        // the document must never be framed.
        nsCOMPtr<nsIDOMWindow> thisWindow = do_GetInterface(static_cast<nsIDocShell*>(mDocShell));
        // If we don't have DOMWindow there is no risk of clickjacking
        if (!thisWindow)
            return true;

        // GetScriptableTop, not GetTop, because we want this to respect
        // <iframe mozbrowser> boundaries.
        nsCOMPtr<nsIDOMWindow> topWindow;
        thisWindow->GetScriptableTop(getter_AddRefs(topWindow));

        // if the document is in the top window, it's not in a frame.
        if (thisWindow == topWindow)
            return true;

        // Find the top docshell in our parent chain that doesn't have the system
        // principal and use it for the principal comparison.  Finding the top
        // content-type docshell doesn't work because some chrome documents are
        // loaded in content docshells (see bug 593387).
        nsCOMPtr<nsIDocShellTreeItem> thisDocShellItem(do_QueryInterface(
                                                       static_cast<nsIDocShell*> (mDocShell)));
        nsCOMPtr<nsIDocShellTreeItem> parentDocShellItem,
                                      curDocShellItem = thisDocShellItem;
        nsCOMPtr<nsIDocument> topDoc;
        nsresult rv;
        nsCOMPtr<nsIScriptSecurityManager> ssm =
            do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
        if (!ssm) {
            NS_ASSERTION(ssm, "Failed to get the ScriptSecurityManager.");
            return false;
        }

        // Traverse up the parent chain and stop when we see a docshell whose
        // parent has a system principal, or a docshell corresponding to
        // <iframe mozbrowser>.
        while (NS_SUCCEEDED(curDocShellItem->GetParent(getter_AddRefs(parentDocShellItem))) &&
               parentDocShellItem) {

            nsCOMPtr<nsIDocShell> curDocShell = do_QueryInterface(curDocShellItem);
            if (curDocShell && curDocShell->GetIsContentBoundary()) {
              break;
            }

            bool system = false;
            topDoc = do_GetInterface(parentDocShellItem);
            if (topDoc) {
                if (NS_SUCCEEDED(ssm->IsSystemPrincipal(topDoc->NodePrincipal(),
                                                        &system)) && system) {
                    // Found a system-principled doc: last docshell was top.
                    break;
                }
            }
            else {
                return false;
            }
            curDocShellItem = parentDocShellItem;
        }

        // If this document has the top non-SystemPrincipal docshell it is not being
        // framed or it is being framed by a chrome document, which we allow.
        if (curDocShellItem == thisDocShellItem)
            return true;

        // If the value of the header is DENY, and the previous condition is
        // not met (current docshell is not the top docshell), prohibit the
        // load.
        if (policy.LowerCaseEqualsLiteral("deny")) {
            return false;
        }

        topDoc = do_GetInterface(curDocShellItem);
        nsCOMPtr<nsIURI> topUri;
        topDoc->NodePrincipal()->GetURI(getter_AddRefs(topUri));
        nsCOMPtr<nsIURI> uri;

        // If the X-Frame-Options value is SAMEORIGIN, then the top frame in the
        // parent chain must be from the same origin as this document.
        if (policy.LowerCaseEqualsLiteral("sameorigin")) {
//.........这里部分代码省略.........

bool nsMsgLocalStoreUtils::nsShouldIgnoreFile(nsAString &name) {
  if (name.IsEmpty()) return true;

  char16_t firstChar = name.First();
  if (firstChar == '.' || firstChar == '#' ||
      name.CharAt(name.Length() - 1) == '~')
    return true;

  if (name.LowerCaseEqualsLiteral("msgfilterrules.dat") ||
      name.LowerCaseEqualsLiteral("rules.dat") ||
      name.LowerCaseEqualsLiteral("filterlog.html") ||
      name.LowerCaseEqualsLiteral("junklog.html") ||
      name.LowerCaseEqualsLiteral("rulesbackup.dat"))
    return true;

  // don't add summary files to the list of folders;
  // don't add popstate files to the list either, or rules (sort.dat).
  if (StringEndsWith(name, NS_LITERAL_STRING(".snm")) ||
      name.LowerCaseEqualsLiteral("popstate.dat") ||
      name.LowerCaseEqualsLiteral("sort.dat") ||
      name.LowerCaseEqualsLiteral("mailfilt.log") ||
      name.LowerCaseEqualsLiteral("filters.js") ||
      StringEndsWith(name, NS_LITERAL_STRING(".toc")))
    return true;

  // ignore RSS data source files
  if (name.LowerCaseEqualsLiteral("feeds.rdf") ||
      name.LowerCaseEqualsLiteral("feeditems.rdf") ||
      StringBeginsWith(name, NS_LITERAL_STRING("feeditems_error")))
    return true;

  // The .mozmsgs dir is for spotlight support
  return (StringEndsWith(name, NS_LITERAL_STRING(".mozmsgs")) ||
          StringEndsWith(name, NS_LITERAL_STRING(FOLDER_SUFFIX)) ||
          StringEndsWith(name, NS_LITERAL_STRING(SUMMARY_SUFFIX)));
}

/* static */ nsresult
nsEventDispatcher::CreateEvent(nsPresContext* aPresContext,
                               nsEvent* aEvent,
                               const nsAString& aEventType,
                               nsIDOMEvent** aDOMEvent)
{
  *aDOMEvent = nullptr;

  if (aEvent) {
    switch(aEvent->eventStructType) {
    case NS_MUTATION_EVENT:
      return NS_NewDOMMutationEvent(aDOMEvent, aPresContext,
                                    static_cast<nsMutationEvent*>(aEvent));
    case NS_GUI_EVENT:
    case NS_SCROLLPORT_EVENT:
    case NS_UI_EVENT:
      return NS_NewDOMUIEvent(aDOMEvent, aPresContext,
                              static_cast<nsGUIEvent*>(aEvent));
    case NS_SCROLLAREA_EVENT:
      return NS_NewDOMScrollAreaEvent(aDOMEvent, aPresContext,
                                      static_cast<nsScrollAreaEvent *>(aEvent));
    case NS_KEY_EVENT:
      return NS_NewDOMKeyboardEvent(aDOMEvent, aPresContext,
                                    static_cast<nsKeyEvent*>(aEvent));
    case NS_COMPOSITION_EVENT:
      return NS_NewDOMCompositionEvent(
        aDOMEvent, aPresContext, static_cast<nsCompositionEvent*>(aEvent));
    case NS_MOUSE_EVENT:
    case NS_POPUP_EVENT:
      return NS_NewDOMMouseEvent(aDOMEvent, aPresContext,
                                 static_cast<nsInputEvent*>(aEvent));
    case NS_MOUSE_SCROLL_EVENT:
      return NS_NewDOMMouseScrollEvent(aDOMEvent, aPresContext,
                                 static_cast<nsInputEvent*>(aEvent));
    case NS_WHEEL_EVENT:
      return NS_NewDOMWheelEvent(aDOMEvent, aPresContext,
                                 static_cast<widget::WheelEvent*>(aEvent));
    case NS_DRAG_EVENT:
      return NS_NewDOMDragEvent(aDOMEvent, aPresContext,
                                 static_cast<nsDragEvent*>(aEvent));
    case NS_TEXT_EVENT:
      return NS_NewDOMTextEvent(aDOMEvent, aPresContext,
                                static_cast<nsTextEvent*>(aEvent));
    case NS_SVG_EVENT:
      return NS_NewDOMSVGEvent(aDOMEvent, aPresContext,
                               aEvent);
    case NS_SVGZOOM_EVENT:
      return NS_NewDOMSVGZoomEvent(aDOMEvent, aPresContext,
                                   static_cast<nsGUIEvent*>(aEvent));
    case NS_SMIL_TIME_EVENT:
      return NS_NewDOMTimeEvent(aDOMEvent, aPresContext, aEvent);

    case NS_COMMAND_EVENT:
      return NS_NewDOMCommandEvent(aDOMEvent, aPresContext,
                                   static_cast<nsCommandEvent*>(aEvent));
    case NS_SIMPLE_GESTURE_EVENT:
      return NS_NewDOMSimpleGestureEvent(aDOMEvent, aPresContext,
                                         static_cast<nsSimpleGestureEvent*>(aEvent));
    case NS_TOUCH_EVENT:
      return NS_NewDOMTouchEvent(aDOMEvent, aPresContext,
                                 static_cast<nsTouchEvent*>(aEvent));
    case NS_TRANSITION_EVENT:
      return NS_NewDOMTransitionEvent(aDOMEvent, aPresContext,
                                      static_cast<nsTransitionEvent*>(aEvent));
    case NS_ANIMATION_EVENT:
      return NS_NewDOMAnimationEvent(aDOMEvent, aPresContext,
                                     static_cast<nsAnimationEvent*>(aEvent));
    }

    // For all other types of events, create a vanilla event object.
    return NS_NewDOMEvent(aDOMEvent, aPresContext, aEvent);
  }

  // And if we didn't get an event, check the type argument.

  if (aEventType.LowerCaseEqualsLiteral("mouseevent") ||
      aEventType.LowerCaseEqualsLiteral("mouseevents") ||
      aEventType.LowerCaseEqualsLiteral("popupevents"))
    return NS_NewDOMMouseEvent(aDOMEvent, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("mousescrollevents"))
    return NS_NewDOMMouseScrollEvent(aDOMEvent, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("dragevent") ||
      aEventType.LowerCaseEqualsLiteral("dragevents"))
    return NS_NewDOMDragEvent(aDOMEvent, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("keyboardevent") ||
      aEventType.LowerCaseEqualsLiteral("keyevents"))
    return NS_NewDOMKeyboardEvent(aDOMEvent, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("compositionevent"))
    return NS_NewDOMCompositionEvent(aDOMEvent, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("mutationevent") ||
        aEventType.LowerCaseEqualsLiteral("mutationevents"))
    return NS_NewDOMMutationEvent(aDOMEvent, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("textevent") ||
      aEventType.LowerCaseEqualsLiteral("textevents"))
    return NS_NewDOMTextEvent(aDOMEvent, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("popupblockedevents"))
    return NS_NewDOMPopupBlockedEvent(aDOMEvent, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("deviceorientationevent"))
    return NS_NewDOMDeviceOrientationEvent(aDOMEvent, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("devicemotionevent"))
//.........这里部分代码省略.........

/* static */ nsresult
EventDispatcher::CreateEvent(EventTarget* aOwner,
                             nsPresContext* aPresContext,
                             WidgetEvent* aEvent,
                             const nsAString& aEventType,
                             nsIDOMEvent** aDOMEvent)
{
  *aDOMEvent = nullptr;

  if (aEvent) {
    switch(aEvent->eventStructType) {
    case NS_MUTATION_EVENT:
      return NS_NewDOMMutationEvent(aDOMEvent, aOwner, aPresContext,
                                    aEvent->AsMutationEvent());
    case NS_GUI_EVENT:
    case NS_SCROLLPORT_EVENT:
    case NS_UI_EVENT:
      return NS_NewDOMUIEvent(aDOMEvent, aOwner, aPresContext,
                              aEvent->AsGUIEvent());
    case NS_SCROLLAREA_EVENT:
      return NS_NewDOMScrollAreaEvent(aDOMEvent, aOwner, aPresContext,
                                      aEvent->AsScrollAreaEvent());
    case NS_KEY_EVENT:
      return NS_NewDOMKeyboardEvent(aDOMEvent, aOwner, aPresContext,
                                    aEvent->AsKeyboardEvent());
    case NS_COMPOSITION_EVENT:
      return NS_NewDOMCompositionEvent(aDOMEvent, aOwner, aPresContext,
                                       aEvent->AsCompositionEvent());
    case NS_MOUSE_EVENT:
      return NS_NewDOMMouseEvent(aDOMEvent, aOwner, aPresContext,
                                 aEvent->AsMouseEvent());
    case NS_FOCUS_EVENT:
      return NS_NewDOMFocusEvent(aDOMEvent, aOwner, aPresContext,
                                 aEvent->AsFocusEvent());
    case NS_MOUSE_SCROLL_EVENT:
      return NS_NewDOMMouseScrollEvent(aDOMEvent, aOwner, aPresContext,
                                       aEvent->AsMouseScrollEvent());
    case NS_WHEEL_EVENT:
      return NS_NewDOMWheelEvent(aDOMEvent, aOwner, aPresContext,
                                 aEvent->AsWheelEvent());
    case NS_EDITOR_INPUT_EVENT:
      return NS_NewDOMInputEvent(aDOMEvent, aOwner, aPresContext,
                                 aEvent->AsEditorInputEvent());
    case NS_DRAG_EVENT:
      return NS_NewDOMDragEvent(aDOMEvent, aOwner, aPresContext,
                                aEvent->AsDragEvent());
    case NS_TEXT_EVENT:
      return NS_NewDOMUIEvent(aDOMEvent, aOwner, aPresContext,
                              aEvent->AsTextEvent());
    case NS_CLIPBOARD_EVENT:
      return NS_NewDOMClipboardEvent(aDOMEvent, aOwner, aPresContext,
                                     aEvent->AsClipboardEvent());
    case NS_SVGZOOM_EVENT:
      return NS_NewDOMSVGZoomEvent(aDOMEvent, aOwner, aPresContext,
                                   aEvent->AsGUIEvent());
    case NS_SMIL_TIME_EVENT:
      return NS_NewDOMTimeEvent(aDOMEvent, aOwner, aPresContext, aEvent);

    case NS_COMMAND_EVENT:
      return NS_NewDOMCommandEvent(aDOMEvent, aOwner, aPresContext,
                                   aEvent->AsCommandEvent());
    case NS_SIMPLE_GESTURE_EVENT:
      return NS_NewDOMSimpleGestureEvent(aDOMEvent, aOwner, aPresContext,
                                         aEvent->AsSimpleGestureEvent());
    case NS_POINTER_EVENT:
      return NS_NewDOMPointerEvent(aDOMEvent, aOwner, aPresContext,
                                   aEvent->AsPointerEvent());
    case NS_TOUCH_EVENT:
      return NS_NewDOMTouchEvent(aDOMEvent, aOwner, aPresContext,
                                 aEvent->AsTouchEvent());
    case NS_TRANSITION_EVENT:
      return NS_NewDOMTransitionEvent(aDOMEvent, aOwner, aPresContext,
                                      aEvent->AsTransitionEvent());
    case NS_ANIMATION_EVENT:
      return NS_NewDOMAnimationEvent(aDOMEvent, aOwner, aPresContext,
                                     aEvent->AsAnimationEvent());
    default:
      // For all other types of events, create a vanilla event object.
      return NS_NewDOMEvent(aDOMEvent, aOwner, aPresContext, aEvent);
    }
  }

  // And if we didn't get an event, check the type argument.

  if (aEventType.LowerCaseEqualsLiteral("mouseevent") ||
      aEventType.LowerCaseEqualsLiteral("mouseevents") ||
      aEventType.LowerCaseEqualsLiteral("popupevents"))
    return NS_NewDOMMouseEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("mousescrollevents"))
    return NS_NewDOMMouseScrollEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("dragevent") ||
      aEventType.LowerCaseEqualsLiteral("dragevents"))
    return NS_NewDOMDragEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("keyboardevent") ||
      aEventType.LowerCaseEqualsLiteral("keyevents"))
    return NS_NewDOMKeyboardEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("compositionevent"))
    return NS_NewDOMCompositionEvent(aDOMEvent, aOwner, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("mutationevent") ||
        aEventType.LowerCaseEqualsLiteral("mutationevents"))
//.........这里部分代码省略.........