Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/C/Firefox/dom/html/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 10 kB

Quelle HTMLFormControlsCollection.cpp Sprache: C

/* -*- 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/. */

#include "mozilla/dom/HTMLFormControlsCollection.h"

#include "mozilla/FlushType.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLFormControlsCollectionBinding.h"
#include "mozilla/dom/HTMLFormElement.h"
#include "nsGenericHTMLElement.h"  // nsGenericHTMLFormElement
#include "nsQueryObject.h"
#include "nsIFormControl.h"
#include "RadioNodeList.h"
#include "jsfriendapi.h"

namespace mozilla::dom {

/* static */
bool HTMLFormControlsCollection::ShouldBeInElements(
    const nsIFormControl* aFormControl) {
  // For backwards compatibility (with 4.x and IE) we must not add
  // <input type=image> elements to the list of form controls in a
  // form.

  switch (aFormControl->ControlType()) {
    case FormControlType::ButtonButton:
    case FormControlType::ButtonReset:
    case FormControlType::ButtonSubmit:
    case FormControlType::InputButton:
    case FormControlType::InputCheckbox:
    case FormControlType::InputColor:
    case FormControlType::InputEmail:
    case FormControlType::InputFile:
    case FormControlType::InputHidden:
    case FormControlType::InputReset:
    case FormControlType::InputPassword:
    case FormControlType::InputRadio:
    case FormControlType::InputSearch:
    case FormControlType::InputSubmit:
    case FormControlType::InputText:
    case FormControlType::InputTel:
    case FormControlType::InputUrl:
    case FormControlType::InputNumber:
    case FormControlType::InputRange:
    case FormControlType::InputDate:
    case FormControlType::InputTime:
    case FormControlType::InputMonth:
    case FormControlType::InputWeek:
    case FormControlType::InputDatetimeLocal:
    case FormControlType::Select:
    case FormControlType::Textarea:
    case FormControlType::Fieldset:
    case FormControlType::Object:
    case FormControlType::Output:
    case FormControlType::FormAssociatedCustomElement:
      return true;

    // These form control types are not supposed to end up in the
    // form.elements array
    // XXXbz maybe we should just return aType != InputImage or something
    // instead of the big switch?
    case FormControlType::InputImage:
      break;
  }
  return false;
}

HTMLFormControlsCollection::HTMLFormControlsCollection(HTMLFormElement* aForm)
    : mForm(aForm),
      mNameLookupTable(HTMLFormElement::FORM_CONTROL_LIST_HASHTABLE_LENGTH) {}

HTMLFormControlsCollection::~HTMLFormControlsCollection() {
  mForm = nullptr;
  Clear();
}

void HTMLFormControlsCollection::DropFormReference() {
  mForm = nullptr;
  Clear();
}

void HTMLFormControlsCollection::Clear() {
  // Null out childrens' pointer to me.  No refcounting here
  for (nsGenericHTMLFormElement* element : Reversed(mElements.AsList())) {
    nsCOMPtr<nsIFormControl> formControl = nsIFormControl::FromNode(element);
    MOZ_ASSERT(formControl);
    formControl->ClearForm(false, false);
  }
  mElements.Clear();

  for (nsGenericHTMLFormElement* element : Reversed(mNotInElements.AsList())) {
    nsCOMPtr<nsIFormControl> formControl = nsIFormControl::FromNode(element);
    MOZ_ASSERT(formControl);
    formControl->ClearForm(false, false);
  }
  mNotInElements.Clear();

  mNameLookupTable.Clear();
}

NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLFormControlsCollection)

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(HTMLFormControlsCollection)
  // Note: We intentionally don't set tmp->mForm to nullptr here, since doing
  // so may result in crashes because of inconsistent null-checking after the
  // object gets unlinked.
  tmp->Clear();
  NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(HTMLFormControlsCollection)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNameLookupTable)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(HTMLFormControlsCollection)
  NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_TRACE_END

// XPConnect interface list for HTMLFormControlsCollection
NS_INTERFACE_TABLE_HEAD(HTMLFormControlsCollection)
  NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
  NS_INTERFACE_TABLE(HTMLFormControlsCollection, nsIHTMLCollection)
  NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(HTMLFormControlsCollection)
NS_INTERFACE_MAP_END

NS_IMPL_CYCLE_COLLECTING_ADDREF(HTMLFormControlsCollection)
NS_IMPL_CYCLE_COLLECTING_RELEASE(HTMLFormControlsCollection)

// nsIHTMLCollection interfac

uint32_t HTMLFormControlsCollection::Length() { return mElements->Length(); }

nsISupports* HTMLFormControlsCollection::NamedItemInternal(
    const nsAString& aName) {
  return mNameLookupTable.GetWeak(aName);
}

nsresult HTMLFormControlsCollection::AddElementToTable(
    nsGenericHTMLFormElement* aChild, const nsAString& aName) {
  const auto* formControl = nsIFormControl::FromNode(aChild);
  MOZ_ASSERT(formControl);
  if (!ShouldBeInElements(formControl)) {
    return NS_OK;
  }

  return mForm->AddElementToTableInternal(mNameLookupTable, aChild, aName);
}

nsresult HTMLFormControlsCollection::IndexOfContent(nsIContent* aContent,
                                                    int32_t* aIndex) {
  // Note -- not a DOM method; callers should handle flushing themselves

  NS_ENSURE_ARG_POINTER(aIndex);
  *aIndex = mElements->IndexOf(aContent);
  return NS_OK;
}

nsresult HTMLFormControlsCollection::RemoveElementFromTable(
    nsGenericHTMLFormElement* aChild, const nsAString& aName) {
  const auto* formControl = nsIFormControl::FromNode(aChild);
  MOZ_ASSERT(formControl);
  if (!ShouldBeInElements(formControl)) {
    return NS_OK;
  }

  return mForm->RemoveElementFromTableInternal(mNameLookupTable, aChild, aName);
}

nsresult HTMLFormControlsCollection::GetSortedControls(
    nsTArray<RefPtr<nsGenericHTMLFormElement>>& aControls) const {
#ifdef DEBUG
  HTMLFormElement::AssertDocumentOrder(mElements, mForm);
  HTMLFormElement::AssertDocumentOrder(mNotInElements, mForm);
#endif

  aControls.Clear();

  // Merge the elements list and the not in elements list. Both lists are
  // already sorted.
  uint32_t elementsLen = mElements->Length();
  uint32_t notInElementsLen = mNotInElements->Length();
  aControls.SetCapacity(elementsLen + notInElementsLen);

  uint32_t elementsIdx = 0;
  uint32_t notInElementsIdx = 0;

  while (elementsIdx < elementsLen || notInElementsIdx < notInElementsLen) {
    // Check whether we're done with mElements
    if (elementsIdx == elementsLen) {
      NS_ASSERTION(notInElementsIdx < notInElementsLen,
                   "Should have remaining not-in-elements");
      // Append the remaining mNotInElements elements
      // XXX(Bug 1631371) Check if this should use a fallible operation as it
      // pretended earlier.
      aControls.AppendElements(mNotInElements->Elements() + notInElementsIdx,
                               notInElementsLen - notInElementsIdx);
      break;
    }
    // Check whether we're done with mNotInElements
    if (notInElementsIdx == notInElementsLen) {
      NS_ASSERTION(elementsIdx < elementsLen,
                   "Should have remaining in-elements");
      // Append the remaining mElements elements
      // XXX(Bug 1631371) Check if this should use a fallible operation as it
      // pretended earlier.
      aControls.AppendElements(mElements->Elements() + elementsIdx,
                               elementsLen - elementsIdx);
      break;
    }
    // Both lists have elements left.
    NS_ASSERTION(mElements->ElementAt(elementsIdx) &&
                     mNotInElements->ElementAt(notInElementsIdx),
                 "Should have remaining elements");
    // Determine which of the two elements should be ordered
    // first and add it to the end of the list.
    nsGenericHTMLFormElement* elementToAdd;
    if (nsContentUtils::CompareTreePosition<TreeKind::DOM>(
            mElements->ElementAt(elementsIdx),
            mNotInElements->ElementAt(notInElementsIdx), mForm) < 0) {
      elementToAdd = mElements->ElementAt(elementsIdx);
      ++elementsIdx;
    } else {
      elementToAdd = mNotInElements->ElementAt(notInElementsIdx);
      ++notInElementsIdx;
    }
    // Add the first element to the list.
    // XXX(Bug 1631371) Check if this should use a fallible operation as it
    // pretended earlier.
    aControls.AppendElement(elementToAdd);
  }

  NS_ASSERTION(aControls.Length() == elementsLen + notInElementsLen,
               "Not all form controls were added to the sorted list");
#ifdef DEBUG
  HTMLFormElement::AssertDocumentOrder(aControls, mForm);
#endif

  return NS_OK;
}

Element* HTMLFormControlsCollection::GetElementAt(uint32_t aIndex) {
  return mElements->SafeElementAt(aIndex, nullptr);
}

/* virtual */
nsINode* HTMLFormControlsCollection::GetParentObject() { return mForm; }

/* virtual */
Element* HTMLFormControlsCollection::GetFirstNamedElement(
    const nsAString& aName, bool& aFound) {
  Nullable<OwningRadioNodeListOrElement> maybeResult;
  NamedGetter(aName, aFound, maybeResult);
  if (!aFound) {
    return nullptr;
  }
  MOZ_ASSERT(!maybeResult.IsNull());
  const OwningRadioNodeListOrElement& result = maybeResult.Value();
  if (result.IsElement()) {
    return result.GetAsElement().get();
  }
  if (result.IsRadioNodeList()) {
    RadioNodeList& nodelist = result.GetAsRadioNodeList();
    return nodelist.Item(0)->AsElement();
  }
  MOZ_ASSERT_UNREACHABLE("Should only have Elements and NodeLists here.");
  return nullptr;
}

void HTMLFormControlsCollection::NamedGetter(
    const nsAString& aName, bool& aFound,
    Nullable<OwningRadioNodeListOrElement>& aResult) {
  nsISupports* item = NamedItemInternal(aName);
  if (!item) {
    aFound = false;
    return;
  }
  aFound = true;
  if (nsCOMPtr<Element> element = do_QueryInterface(item)) {
    aResult.SetValue().SetAsElement() = element;
    return;
  }
  if (nsCOMPtr<RadioNodeList> nodelist = do_QueryInterface(item)) {
    aResult.SetValue().SetAsRadioNodeList() = nodelist;
    return;
  }
  MOZ_ASSERT_UNREACHABLE("Should only have Elements and NodeLists here.");
}

void HTMLFormControlsCollection::GetSupportedNames(nsTArray<nsString>& aNames) {
  // Just enumerate mNameLookupTable.  This won't guarantee order, but
  // that's OK, because the HTML5 spec doesn't define an order for
  // this enumeration.
  AppendToArray(aNames, mNameLookupTable.Keys());
}

/* virtual */
JSObject* HTMLFormControlsCollection::WrapObject(
    JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
  return HTMLFormControlsCollection_Binding::Wrap(aCx, this, aGivenProto);
}

}  // namespace mozilla::dom

quality94%

¤ Dauer der Verarbeitung: 0.39 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.