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gecko-dev/dom/html/HTMLFormElement.cpp

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/* -*- 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/HTMLFormElement.h"
#include <utility>
#include "Attr.h"
#include "jsapi.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/BinarySearch.h"
#include "mozilla/Components.h"
#include "mozilla/ContentEvents.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/PresShell.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/dom/BindContext.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/CustomEvent.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/HTMLFormControlsCollection.h"
#include "mozilla/dom/HTMLFormElementBinding.h"
#include "mozilla/dom/TreeOrderedArrayInlines.h"
#include "mozilla/dom/nsCSPContext.h"
#include "mozilla/dom/nsCSPUtils.h"
#include "mozilla/dom/nsMixedContentBlocker.h"
#include "nsCOMArray.h"
#include "nsContentList.h"
#include "nsContentUtils.h"
#include "nsDOMAttributeMap.h"
#include "nsDocShell.h"
#include "nsDocShellLoadState.h"
#include "nsError.h"
#include "nsFocusManager.h"
#include "nsGkAtoms.h"
#include "nsHTMLDocument.h"
#include "nsInterfaceHashtable.h"
#include "nsPresContext.h"
#include "nsQueryObject.h"
#include "nsStyleConsts.h"
#include "nsTArray.h"
// form submission
#include "HTMLFormSubmissionConstants.h"
#include "mozilla/dom/FormData.h"
#include "mozilla/dom/FormDataEvent.h"
#include "mozilla/dom/SubmitEvent.h"
#include "mozilla/Telemetry.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/StaticPrefs_prompts.h"
#include "nsCategoryManagerUtils.h"
#include "nsIContentInlines.h"
#include "nsISimpleEnumerator.h"
#include "nsRange.h"
#include "nsIScriptError.h"
#include "nsIScriptSecurityManager.h"
#include "nsNetUtil.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIDocShell.h"
#include "nsIPromptService.h"
#include "nsISecurityUITelemetry.h"
#include "nsIStringBundle.h"
// radio buttons
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/HTMLButtonElement.h"
#include "mozilla/dom/HTMLSelectElement.h"
#include "nsIRadioVisitor.h"
#include "RadioNodeList.h"
#include "nsLayoutUtils.h"
#include "mozAutoDocUpdate.h"
#include "nsIHTMLCollection.h"
#include "nsIConstraintValidation.h"
#include "nsSandboxFlags.h"
#include "mozilla/dom/HTMLAnchorElement.h"
// images
#include "mozilla/dom/HTMLImageElement.h"
#include "mozilla/dom/HTMLButtonElement.h"
// construction, destruction
NS_IMPL_NS_NEW_HTML_ELEMENT(Form)
namespace mozilla::dom {
static const uint8_t NS_FORM_AUTOCOMPLETE_ON = 1;
static const uint8_t NS_FORM_AUTOCOMPLETE_OFF = 0;
static const nsAttrValue::EnumTable kFormAutocompleteTable[] = {
{"on", NS_FORM_AUTOCOMPLETE_ON},
{"off", NS_FORM_AUTOCOMPLETE_OFF},
{nullptr, 0}};
// Default autocomplete value is 'on'.
static const nsAttrValue::EnumTable* kFormDefaultAutocomplete =
&kFormAutocompleteTable[0];
HTMLFormElement::HTMLFormElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
: nsGenericHTMLElement(std::move(aNodeInfo)),
mControls(new HTMLFormControlsCollection(this)),
mPendingSubmission(nullptr),
mDefaultSubmitElement(nullptr),
mFirstSubmitInElements(nullptr),
mFirstSubmitNotInElements(nullptr),
mImageNameLookupTable(FORM_CONTROL_LIST_HASHTABLE_LENGTH),
mPastNameLookupTable(FORM_CONTROL_LIST_HASHTABLE_LENGTH),
mSubmitPopupState(PopupBlocker::openAbused),
mInvalidElementsCount(0),
mFormNumber(-1),
mGeneratingSubmit(false),
mGeneratingReset(false),
mDeferSubmission(false),
mNotifiedObservers(false),
mNotifiedObserversResult(false),
mIsConstructingEntryList(false),
mIsFiringSubmissionEvents(false) {
// We start out valid.
AddStatesSilently(ElementState::VALID);
}
HTMLFormElement::~HTMLFormElement() {
if (mControls) {
mControls->DropFormReference();
}
Clear();
}
// nsISupports
NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLFormElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLFormElement,
nsGenericHTMLElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mControls)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mImageNameLookupTable)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPastNameLookupTable)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRelList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTargetContext)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLFormElement,
nsGenericHTMLElement)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mRelList)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mTargetContext)
tmp->Clear();
tmp->mExpandoAndGeneration.OwnerUnlinked();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(HTMLFormElement,
nsGenericHTMLElement)
// EventTarget
void HTMLFormElement::AsyncEventRunning(AsyncEventDispatcher* aEvent) {
if (aEvent->mEventType == u"DOMFormHasPassword"_ns) {
mHasPendingPasswordEvent = false;
} else if (aEvent->mEventType == u"DOMPossibleUsernameInputAdded"_ns) {
mHasPendingPossibleUsernameEvent = false;
}
}
nsDOMTokenList* HTMLFormElement::RelList() {
if (!mRelList) {
mRelList =
new nsDOMTokenList(this, nsGkAtoms::rel, sAnchorAndFormRelValues);
}
return mRelList;
}
NS_IMPL_ELEMENT_CLONE(HTMLFormElement)
HTMLFormControlsCollection* HTMLFormElement::Elements() { return mControls; }
void HTMLFormElement::BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
const nsAttrValue* aValue, bool aNotify) {
if (aNamespaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::action || aName == nsGkAtoms::target) {
// Don't forget we've notified the password manager already if the
// page sets the action/target in the during submit. (bug 343182)
bool notifiedObservers = mNotifiedObservers;
ForgetCurrentSubmission();
mNotifiedObservers = notifiedObservers;
}
}
return nsGenericHTMLElement::BeforeSetAttr(aNamespaceID, aName, aValue,
aNotify);
}
void HTMLFormElement::GetAutocomplete(nsAString& aValue) {
GetEnumAttr(nsGkAtoms::autocomplete, kFormDefaultAutocomplete->tag, aValue);
}
void HTMLFormElement::GetEnctype(nsAString& aValue) {
GetEnumAttr(nsGkAtoms::enctype, kFormDefaultEnctype->tag, aValue);
}
void HTMLFormElement::GetMethod(nsAString& aValue) {
GetEnumAttr(nsGkAtoms::method, kFormDefaultMethod->tag, aValue);
}
void HTMLFormElement::ReportInvalidUnfocusableElements(
const nsTArray<RefPtr<Element>>&& aInvalidElements) {
RefPtr<nsFocusManager> focusManager = nsFocusManager::GetFocusManager();
MOZ_ASSERT(focusManager);
for (const auto& element : aInvalidElements) {
bool isFocusable = false;
// MOZ_KnownLive because 'aInvalidElements' is guaranteed to keep it alive.
// This can go away once bug 1620312 is fixed.
focusManager->ElementIsFocusable(MOZ_KnownLive(element), 0, &isFocusable);
if (!isFocusable) {
nsTArray<nsString> params;
nsAutoCString messageName("InvalidFormControlUnfocusable");
if (Attr* nameAttr = element->GetAttributes()->GetNamedItem(u"name"_ns)) {
nsAutoString name;
nameAttr->GetValue(name);
params.AppendElement(name);
messageName = "InvalidNamedFormControlUnfocusable";
}
nsContentUtils::ReportToConsole(
nsIScriptError::errorFlag, "DOM"_ns, element->GetOwnerDocument(),
nsContentUtils::eDOM_PROPERTIES, messageName.get(), params,
SourceLocation(element->GetBaseURI()));
}
}
}
// https://html.spec.whatwg.org/multipage/forms.html#concept-form-submit
void HTMLFormElement::MaybeSubmit(Element* aSubmitter) {
#ifdef DEBUG
if (aSubmitter) {
const auto* fc = nsIFormControl::FromNode(aSubmitter);
MOZ_ASSERT(fc);
MOZ_ASSERT(fc->IsSubmitControl(), "aSubmitter is not a submit control?");
}
#endif
// 1-4 of
// https://html.spec.whatwg.org/multipage/forms.html#concept-form-submit
Document* doc = GetComposedDoc();
if (mIsConstructingEntryList || !doc ||
(doc->GetSandboxFlags() & SANDBOXED_FORMS)) {
return;
}
// 5.1. If form's firing submission events is true, then return.
if (mIsFiringSubmissionEvents) {
return;
}
// 5.2. Set form's firing submission events to true.
AutoRestore<bool> resetFiringSubmissionEventsFlag(mIsFiringSubmissionEvents);
mIsFiringSubmissionEvents = true;
// Flag elements as user-interacted.
// FIXME: Should be specified, see:
// https://github.com/whatwg/html/issues/10066
{
for (nsGenericHTMLFormElement* el : mControls->mElements.AsList()) {
el->SetUserInteracted(true);
}
for (nsGenericHTMLFormElement* el : mControls->mNotInElements.AsList()) {
el->SetUserInteracted(true);
}
}
// 5.3. If the submitter element's no-validate state is false, then
// interactively validate the constraints of form and examine the result.
// If the result is negative (i.e., the constraint validation concluded
// that there were invalid fields and probably informed the user of this)
bool noValidateState =
HasAttr(nsGkAtoms::novalidate) ||
(aSubmitter && aSubmitter->HasAttr(nsGkAtoms::formnovalidate));
if (!noValidateState && !CheckValidFormSubmission()) {
return;
}
RefPtr<PresShell> presShell = doc->GetPresShell();
if (!presShell) {
// We need the nsPresContext for dispatching the submit event. In some
// rare cases we need to flush notifications to force creation of the
// nsPresContext here (for example when a script calls form.requestSubmit()
// from script early during page load). We only flush the notifications
// if the PresShell hasn't been created yet, to limit the performance
// impact.
doc->FlushPendingNotifications(FlushType::EnsurePresShellInitAndFrames);
presShell = doc->GetPresShell();
}
// If |PresShell::Destroy| has been called due to handling the event the pres
// context will return a null pres shell. See bug 125624. Using presShell to
// dispatch the event. It makes sure that event is not handled if the window
// is being destroyed.
if (presShell) {
SubmitEventInit init;
init.mBubbles = true;
init.mCancelable = true;
init.mSubmitter =
aSubmitter ? nsGenericHTMLElement::FromNode(aSubmitter) : nullptr;
RefPtr<SubmitEvent> event =
SubmitEvent::Constructor(this, u"submit"_ns, init);
event->SetTrusted(true);
nsEventStatus status = nsEventStatus_eIgnore;
presShell->HandleDOMEventWithTarget(this, event, &status);
}
}
void HTMLFormElement::MaybeReset(Element* aSubmitter) {
// If |PresShell::Destroy| has been called due to handling the event the pres
// context will return a null pres shell. See bug 125624. Using presShell to
// dispatch the event. It makes sure that event is not handled if the window
// is being destroyed.
if (RefPtr<PresShell> presShell = OwnerDoc()->GetPresShell()) {
InternalFormEvent event(true, eFormReset);
event.mOriginator = aSubmitter;
nsEventStatus status = nsEventStatus_eIgnore;
presShell->HandleDOMEventWithTarget(this, &event, &status);
}
}
void HTMLFormElement::Submit(ErrorResult& aRv) { aRv = DoSubmit(); }
// https://html.spec.whatwg.org/multipage/forms.html#dom-form-requestsubmit
void HTMLFormElement::RequestSubmit(nsGenericHTMLElement* aSubmitter,
ErrorResult& aRv) {
// 1. If submitter is not null, then:
if (aSubmitter) {
const auto* fc = nsIFormControl::FromNodeOrNull(aSubmitter);
// 1.1. If submitter is not a submit button, then throw a TypeError.
if (!fc || !fc->IsSubmitControl()) {
aRv.ThrowTypeError("The submitter is not a submit button.");
return;
}
// 1.2. If submitter's form owner is not this form element, then throw a
// "NotFoundError" DOMException.
if (fc->GetForm() != this) {
aRv.ThrowNotFoundError("The submitter is not owned by this form.");
return;
}
}
// 2. Otherwise, set submitter to this form element.
// 3. Submit this form element, from submitter.
MaybeSubmit(aSubmitter);
}
void HTMLFormElement::Reset() {
InternalFormEvent event(true, eFormReset);
EventDispatcher::Dispatch(this, nullptr, &event);
}
bool HTMLFormElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) {
if (aNamespaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::method) {
return aResult.ParseEnumValue(aValue, kFormMethodTable, false);
}
if (aAttribute == nsGkAtoms::enctype) {
return aResult.ParseEnumValue(aValue, kFormEnctypeTable, false);
}
if (aAttribute == nsGkAtoms::autocomplete) {
return aResult.ParseEnumValue(aValue, kFormAutocompleteTable, false);
}
}
return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
aMaybeScriptedPrincipal, aResult);
}
nsresult HTMLFormElement::BindToTree(BindContext& aContext, nsINode& aParent) {
nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
NS_ENSURE_SUCCESS(rv, rv);
if (IsInUncomposedDoc() && aContext.OwnerDoc().IsHTMLOrXHTML()) {
aContext.OwnerDoc().AsHTMLDocument()->AddedForm();
}
return rv;
}
template <typename T>
static void MarkOrphans(const nsTArray<T*>& aArray) {
uint32_t length = aArray.Length();
for (uint32_t i = 0; i < length; ++i) {
aArray[i]->SetFlags(MAYBE_ORPHAN_FORM_ELEMENT);
}
}
static void CollectOrphans(nsINode* aRemovalRoot,
const nsTArray<nsGenericHTMLFormElement*>& aArray
#ifdef DEBUG
,
HTMLFormElement* aThisForm
#endif
) {
// Put a script blocker around all the notifications we're about to do.
nsAutoScriptBlocker scriptBlocker;
// Walk backwards so that if we remove elements we can just keep iterating
uint32_t length = aArray.Length();
for (uint32_t i = length; i > 0; --i) {
nsGenericHTMLFormElement* node = aArray[i - 1];
// Now if MAYBE_ORPHAN_FORM_ELEMENT is not set, that would mean that the
// node is in fact a descendant of the form and hence should stay in the
// form. If it _is_ set, then we need to check whether the node is a
// descendant of aRemovalRoot. If it is, we leave it in the form.
#ifdef DEBUG
bool removed = false;
#endif
if (node->HasFlag(MAYBE_ORPHAN_FORM_ELEMENT)) {
node->UnsetFlags(MAYBE_ORPHAN_FORM_ELEMENT);
if (!node->IsInclusiveDescendantOf(aRemovalRoot)) {
nsCOMPtr<nsIFormControl> fc = nsIFormControl::FromNode(node);
MOZ_ASSERT(fc);
fc->ClearForm(true, false);
#ifdef DEBUG
removed = true;
#endif
}
}
#ifdef DEBUG
if (!removed) {
const auto* fc = nsIFormControl::FromNode(node);
MOZ_ASSERT(fc);
HTMLFormElement* form = fc->GetForm();
NS_ASSERTION(form == aThisForm, "How did that happen?");
}
#endif /* DEBUG */
}
}
static void CollectOrphans(nsINode* aRemovalRoot,
const nsTArray<HTMLImageElement*>& aArray
#ifdef DEBUG
,
HTMLFormElement* aThisForm
#endif
) {
// Walk backwards so that if we remove elements we can just keep iterating
uint32_t length = aArray.Length();
for (uint32_t i = length; i > 0; --i) {
HTMLImageElement* node = aArray[i - 1];
// Now if MAYBE_ORPHAN_FORM_ELEMENT is not set, that would mean that the
// node is in fact a descendant of the form and hence should stay in the
// form. If it _is_ set, then we need to check whether the node is a
// descendant of aRemovalRoot. If it is, we leave it in the form.
#ifdef DEBUG
bool removed = false;
#endif
if (node->HasFlag(MAYBE_ORPHAN_FORM_ELEMENT)) {
node->UnsetFlags(MAYBE_ORPHAN_FORM_ELEMENT);
if (!node->IsInclusiveDescendantOf(aRemovalRoot)) {
node->ClearForm(true);
#ifdef DEBUG
removed = true;
#endif
}
}
#ifdef DEBUG
if (!removed) {
HTMLFormElement* form = node->GetForm();
NS_ASSERTION(form == aThisForm, "How did that happen?");
}
#endif /* DEBUG */
}
}
void HTMLFormElement::UnbindFromTree(UnbindContext& aContext) {
MaybeFireFormRemoved();
// Note, this is explicitly using uncomposed doc, since we count
// only forms in document.
RefPtr<Document> oldDocument = GetUncomposedDoc();
// Mark all of our controls as maybe being orphans
MarkOrphans(mControls->mElements.AsList());
MarkOrphans(mControls->mNotInElements.AsList());
MarkOrphans(mImageElements.AsList());
nsGenericHTMLElement::UnbindFromTree(aContext);
nsINode* ancestor = this;
nsINode* cur;
do {
cur = ancestor->GetParentNode();
if (!cur) {
break;
}
ancestor = cur;
} while (true);
CollectOrphans(ancestor, mControls->mElements
#ifdef DEBUG
,
this
#endif
);
CollectOrphans(ancestor, mControls->mNotInElements
#ifdef DEBUG
,
this
#endif
);
CollectOrphans(ancestor, mImageElements
#ifdef DEBUG
,
this
#endif
);
if (oldDocument && oldDocument->IsHTMLOrXHTML()) {
oldDocument->AsHTMLDocument()->RemovedForm();
}
ForgetCurrentSubmission();
}
static bool CanSubmit(WidgetEvent& aEvent) {
// According to the UI events spec section "Trusted events", we shouldn't
// trigger UA default action with an untrusted event except click.
// However, there are still some sites depending on sending untrusted event
// to submit form, see Bug 1370630.
return !StaticPrefs::dom_forms_submit_trusted_event_only() ||
aEvent.IsTrusted();
}
void HTMLFormElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
aVisitor.mWantsWillHandleEvent = true;
if (aVisitor.mEvent->mOriginalTarget == static_cast<nsIContent*>(this) &&
CanSubmit(*aVisitor.mEvent)) {
uint32_t msg = aVisitor.mEvent->mMessage;
if (msg == eFormSubmit) {
if (mGeneratingSubmit) {
aVisitor.mCanHandle = false;
return;
}
mGeneratingSubmit = true;
// XXXedgar, the untrusted event would trigger form submission, in this
// case, form need to handle defer flag and flushing pending submission by
// itself. This could be removed after Bug 1370630.
if (!aVisitor.mEvent->IsTrusted()) {
// let the form know that it needs to defer the submission,
// that means that if there are scripted submissions, the
// latest one will be deferred until after the exit point of the
// handler.
mDeferSubmission = true;
}
} else if (msg == eFormReset) {
if (mGeneratingReset) {
aVisitor.mCanHandle = false;
return;
}
mGeneratingReset = true;
}
}
nsGenericHTMLElement::GetEventTargetParent(aVisitor);
}
void HTMLFormElement::WillHandleEvent(EventChainPostVisitor& aVisitor) {
// If this is the bubble stage and there is a nested form below us which
// received a submit event we do *not* want to handle the submit event
// for this form too.
if ((aVisitor.mEvent->mMessage == eFormSubmit ||
aVisitor.mEvent->mMessage == eFormReset) &&
aVisitor.mEvent->mFlags.mInBubblingPhase &&
aVisitor.mEvent->mOriginalTarget != static_cast<nsIContent*>(this)) {
aVisitor.mEvent->StopPropagation();
}
}
nsresult HTMLFormElement::PostHandleEvent(EventChainPostVisitor& aVisitor) {
if (aVisitor.mEvent->mOriginalTarget == static_cast<nsIContent*>(this) &&
CanSubmit(*aVisitor.mEvent)) {
EventMessage msg = aVisitor.mEvent->mMessage;
if (aVisitor.mEventStatus == nsEventStatus_eIgnore) {
switch (msg) {
case eFormReset: {
DoReset();
break;
}
case eFormSubmit: {
if (!aVisitor.mEvent->IsTrusted()) {
// Warning about the form submission is from untrusted event.
OwnerDoc()->WarnOnceAbout(
DeprecatedOperations::eFormSubmissionUntrustedEvent);
}
RefPtr<Event> event = aVisitor.mDOMEvent;
DoSubmit(event);
break;
}
default:
break;
}
}
// XXXedgar, the untrusted event would trigger form submission, in this
// case, form need to handle defer flag and flushing pending submission by
// itself. This could be removed after Bug 1370630.
if (msg == eFormSubmit && !aVisitor.mEvent->IsTrusted()) {
// let the form know not to defer subsequent submissions
mDeferSubmission = false;
// tell the form to flush a possible pending submission.
FlushPendingSubmission();
}
if (msg == eFormSubmit) {
mGeneratingSubmit = false;
} else if (msg == eFormReset) {
mGeneratingReset = false;
}
}
return NS_OK;
}
nsresult HTMLFormElement::DoReset() {
// Make sure the presentation is up-to-date
Document* doc = GetComposedDoc();
if (doc) {
doc->FlushPendingNotifications(FlushType::ContentAndNotify);
}
// JBK walk the elements[] array instead of form frame controls - bug 34297
uint32_t numElements = mControls->Length();
for (uint32_t elementX = 0; elementX < numElements; ++elementX) {
// Hold strong ref in case the reset does something weird
nsCOMPtr<nsIFormControl> controlNode = nsIFormControl::FromNodeOrNull(
mControls->mElements->SafeElementAt(elementX, nullptr));
if (controlNode) {
controlNode->Reset();
}
}
return NS_OK;
}
#define NS_ENSURE_SUBMIT_SUCCESS(rv) \
if (NS_FAILED(rv)) { \
ForgetCurrentSubmission(); \
return rv; \
}
nsresult HTMLFormElement::DoSubmit(Event* aEvent) {
Document* doc = GetComposedDoc();
NS_ASSERTION(doc, "Should never get here without a current doc");
// Make sure the presentation is up-to-date
if (doc) {
doc->FlushPendingNotifications(FlushType::ContentAndNotify);
}
// Don't submit if we're not in a document or if we're in
// a sandboxed frame and form submit is disabled.
if (mIsConstructingEntryList || !doc ||
(doc->GetSandboxFlags() & SANDBOXED_FORMS)) {
return NS_OK;
}
if (IsSubmitting()) {
NS_WARNING("Preventing double form submission");
// XXX Should this return an error?
return NS_OK;
}
mTargetContext = nullptr;
mCurrentLoadId = Nothing();
UniquePtr<HTMLFormSubmission> submission;
//
// prepare the submission object
//
nsresult rv = BuildSubmission(getter_Transfers(submission), aEvent);
// Don't raise an error if form cannot navigate.
if (rv == NS_ERROR_NOT_AVAILABLE) {
return NS_OK;
}
NS_ENSURE_SUCCESS(rv, rv);
// XXXbz if the script global is that for an sXBL/XBL2 doc, it won't
// be a window...
nsPIDOMWindowOuter* window = OwnerDoc()->GetWindow();
if (window) {
mSubmitPopupState = PopupBlocker::GetPopupControlState();
} else {
mSubmitPopupState = PopupBlocker::openAbused;
}
//
// perform the submission
//
if (!submission) {
#ifdef DEBUG
HTMLDialogElement* dialog = nullptr;
for (nsIContent* parent = GetParent(); parent;
parent = parent->GetParent()) {
dialog = HTMLDialogElement::FromNodeOrNull(parent);
if (dialog) {
break;
}
}
MOZ_ASSERT(!dialog || !dialog->Open());
#endif
return NS_OK;
}
if (DialogFormSubmission* dialogSubmission =
submission->GetAsDialogSubmission()) {
return SubmitDialog(dialogSubmission);
}
if (mDeferSubmission) {
// we are in an event handler, JS submitted so we have to
// defer this submission. let's remember it and return
// without submitting
mPendingSubmission = std::move(submission);
return NS_OK;
}
return SubmitSubmission(submission.get());
}
nsresult HTMLFormElement::BuildSubmission(HTMLFormSubmission** aFormSubmission,
Event* aEvent) {
// Get the submitter element
nsGenericHTMLElement* submitter = nullptr;
if (aEvent) {
SubmitEvent* submitEvent = aEvent->AsSubmitEvent();
if (submitEvent) {
submitter = submitEvent->GetSubmitter();
}
}
nsresult rv;
//
// Walk over the form elements and call SubmitNamesValues() on them to get
// their data.
//
auto encoding = GetSubmitEncoding()->OutputEncoding();
RefPtr<FormData> formData =
new FormData(GetOwnerGlobal(), encoding, submitter);
rv = ConstructEntryList(formData);
NS_ENSURE_SUBMIT_SUCCESS(rv);
// Step 9. If form cannot navigate, then return.
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#form-submission-algorithm
if (!GetComposedDoc()) {
return NS_ERROR_NOT_AVAILABLE;
}
//
// Get the submission object
//
rv = HTMLFormSubmission::GetFromForm(this, submitter, encoding,
aFormSubmission);
NS_ENSURE_SUBMIT_SUCCESS(rv);
//
// Dump the data into the submission object
//
if (!(*aFormSubmission)->GetAsDialogSubmission()) {
rv = formData->CopySubmissionDataTo(*aFormSubmission);
NS_ENSURE_SUBMIT_SUCCESS(rv);
}
return NS_OK;
}
nsresult HTMLFormElement::SubmitSubmission(
HTMLFormSubmission* aFormSubmission) {
MOZ_ASSERT(!mDeferSubmission);
MOZ_ASSERT(!mPendingSubmission);
nsCOMPtr<nsIURI> actionURI = aFormSubmission->GetActionURL();
if (!actionURI) {
return NS_OK;
}
// If there is no link handler, then we won't actually be able to submit.
Document* doc = GetComposedDoc();
RefPtr<nsDocShell> container =
doc ? nsDocShell::Cast(doc->GetDocShell()) : nullptr;
if (!container || IsEditable()) {
return NS_OK;
}
// javascript URIs are not really submissions; they just call a function.
// Also, they may synchronously call submit(), and we want them to be able to
// do so while still disallowing other double submissions. (Bug 139798)
// Note that any other URI types that are of equivalent type should also be
// added here.
// XXXbz this is a mess. The real issue here is that nsJSChannel sets the
// LOAD_BACKGROUND flag, so doesn't notify us, compounded by the fact that
// the JS executes before we forget the submission in OnStateChange on
// STATE_STOP. As a result, we have to make sure that we simply pretend
// we're not submitting when submitting to a JS URL. That's kinda bogus, but
// there we are.
bool schemeIsJavaScript = actionURI->SchemeIs("javascript");
//
// Notify observers of submit
//
nsresult rv;
bool cancelSubmit = false;
if (mNotifiedObservers) {
cancelSubmit = mNotifiedObserversResult;
} else {
rv = NotifySubmitObservers(actionURI, &cancelSubmit, true);
NS_ENSURE_SUBMIT_SUCCESS(rv);
}
if (cancelSubmit) {
return NS_OK;
}
cancelSubmit = false;
rv = NotifySubmitObservers(actionURI, &cancelSubmit, false);
NS_ENSURE_SUBMIT_SUCCESS(rv);
if (cancelSubmit) {
return NS_OK;
}
//
// Submit
//
uint64_t currentLoadId = 0;
{
AutoPopupStatePusher popupStatePusher(mSubmitPopupState);
AutoHandlingUserInputStatePusher userInpStatePusher(
aFormSubmission->IsInitiatedFromUserInput());
nsCOMPtr<nsIInputStream> postDataStream;
rv = aFormSubmission->GetEncodedSubmission(
actionURI, getter_AddRefs(postDataStream), actionURI);
NS_ENSURE_SUBMIT_SUCCESS(rv);
nsAutoString target;
aFormSubmission->GetTarget(target);
RefPtr<nsDocShellLoadState> loadState = new nsDocShellLoadState(actionURI);
loadState->SetTarget(target);
loadState->SetPostDataStream(postDataStream);
loadState->SetFirstParty(true);
loadState->SetIsFormSubmission(true);
loadState->SetTriggeringPrincipal(NodePrincipal());
loadState->SetPrincipalToInherit(NodePrincipal());
loadState->SetCsp(GetCsp());
loadState->SetAllowFocusMove(UserActivation::IsHandlingUserInput());
const bool hasValidUserGestureActivation =
doc->HasValidTransientUserGestureActivation();
loadState->SetHasValidUserGestureActivation(hasValidUserGestureActivation);
loadState->SetTextDirectiveUserActivation(
doc->ConsumeTextDirectiveUserActivation() ||
hasValidUserGestureActivation);
nsCOMPtr<nsIPrincipal> nodePrincipal = NodePrincipal();
rv = container->OnLinkClickSync(this, loadState, false, nodePrincipal);
NS_ENSURE_SUBMIT_SUCCESS(rv);
mTargetContext = loadState->TargetBrowsingContext().GetMaybeDiscarded();
currentLoadId = loadState->GetLoadIdentifier();
}
// Even if the submit succeeds, it's possible for there to be no
// browsing context; for example, if it's to a named anchor within
// the same page the submit will not really do anything.
if (mTargetContext && !mTargetContext->IsDiscarded() && !schemeIsJavaScript) {
mCurrentLoadId = Some(currentLoadId);
} else {
ForgetCurrentSubmission();
}
return rv;
}
// https://html.spec.whatwg.org/#concept-form-submit step 11
nsresult HTMLFormElement::SubmitDialog(DialogFormSubmission* aFormSubmission) {
// Close the dialog subject. If there is a result, let that be the return
// value.
HTMLDialogElement* dialog = aFormSubmission->DialogElement();
MOZ_ASSERT(dialog);
Optional<nsAString> retValue;
retValue = &aFormSubmission->ReturnValue();
dialog->Close(retValue);
return NS_OK;
}
nsresult HTMLFormElement::DoSecureToInsecureSubmitCheck(nsIURI* aActionURL,
bool* aCancelSubmit) {
*aCancelSubmit = false;
if (!StaticPrefs::security_warn_submit_secure_to_insecure()) {
return NS_OK;
}
// Only ask the user about posting from a secure URI to an insecure URI if
// this element is in the root document. When this is not the case, the mixed
// content blocker will take care of security for us.
if (!OwnerDoc()->IsTopLevelContentDocument()) {
return NS_OK;
}
if (nsMixedContentBlocker::IsPotentiallyTrustworthyLoopbackURL(aActionURL)) {
return NS_OK;
}
if (nsMixedContentBlocker::URISafeToBeLoadedInSecureContext(aActionURL)) {
return NS_OK;
}
if (nsMixedContentBlocker::IsPotentiallyTrustworthyOnion(aActionURL)) {
return NS_OK;
}
nsCOMPtr<nsPIDOMWindowOuter> window = OwnerDoc()->GetWindow();
if (!window) {
return NS_ERROR_FAILURE;
}
// Now that we know the action URI is insecure check if we're submitting from
// a secure URI and if so fall thru and prompt user about posting.
if (nsCOMPtr<nsPIDOMWindowInner> innerWindow = OwnerDoc()->GetInnerWindow()) {
if (!innerWindow->IsSecureContext()) {
return NS_OK;
}
}
// Bug 1351358: While file URIs are considered to be secure contexts we allow
// submitting a form to an insecure URI from a file URI without an alert in an
// attempt to avoid compatibility issues.
if (window->GetDocumentURI()->SchemeIs("file")) {
return NS_OK;
}
nsCOMPtr<nsIDocShell> docShell = window->GetDocShell();
if (!docShell) {
return NS_ERROR_FAILURE;
}
nsresult rv;
nsCOMPtr<nsIPromptService> promptSvc =
do_GetService("@mozilla.org/prompter;1", &rv);
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsIStringBundle> stringBundle;
nsCOMPtr<nsIStringBundleService> stringBundleService =
mozilla::components::StringBundle::Service();
if (!stringBundleService) {
return NS_ERROR_FAILURE;
}
rv = stringBundleService->CreateBundle(
"chrome://global/locale/browser.properties",
getter_AddRefs(stringBundle));
if (NS_FAILED(rv)) {
return rv;
}
nsAutoString title;
nsAutoString message;
nsAutoString cont;
stringBundle->GetStringFromName("formPostSecureToInsecureWarning.title",
title);
stringBundle->GetStringFromName("formPostSecureToInsecureWarning.message",
message);
stringBundle->GetStringFromName("formPostSecureToInsecureWarning.continue",
cont);
int32_t buttonPressed;
bool checkState =
false; // this is unused (ConfirmEx requires this parameter)
rv = promptSvc->ConfirmExBC(
docShell->GetBrowsingContext(),
StaticPrefs::prompts_modalType_insecureFormSubmit(), title.get(),
message.get(),
(nsIPromptService::BUTTON_TITLE_IS_STRING *
nsIPromptService::BUTTON_POS_0) +
(nsIPromptService::BUTTON_TITLE_CANCEL *
nsIPromptService::BUTTON_POS_1),
cont.get(), nullptr, nullptr, nullptr, &checkState, &buttonPressed);
if (NS_FAILED(rv)) {
return rv;
}
*aCancelSubmit = (buttonPressed == 1);
uint32_t telemetryBucket =
nsISecurityUITelemetry::WARNING_CONFIRM_POST_TO_INSECURE_FROM_SECURE;
mozilla::Telemetry::Accumulate(mozilla::Telemetry::SECURITY_UI,
telemetryBucket);
if (!*aCancelSubmit) {
// The user opted to continue, so note that in the next telemetry bucket.
mozilla::Telemetry::Accumulate(mozilla::Telemetry::SECURITY_UI,
telemetryBucket + 1);
}
return NS_OK;
}
nsresult HTMLFormElement::NotifySubmitObservers(nsIURI* aActionURL,
bool* aCancelSubmit,
bool aEarlyNotify) {
if (!aEarlyNotify) {
nsresult rv = DoSecureToInsecureSubmitCheck(aActionURL, aCancelSubmit);
if (NS_FAILED(rv)) {
return rv;
}
if (*aCancelSubmit) {
return NS_OK;
}
}
bool defaultAction = true;
nsresult rv = nsContentUtils::DispatchEventOnlyToChrome(
OwnerDoc(), static_cast<nsINode*>(this),
aEarlyNotify ? u"DOMFormBeforeSubmit"_ns : u"DOMFormSubmit"_ns,
CanBubble::eYes, Cancelable::eYes, &defaultAction);
*aCancelSubmit = !defaultAction;
if (*aCancelSubmit) {
return NS_OK;
}
return rv;
}
nsresult HTMLFormElement::ConstructEntryList(FormData* aFormData) {
MOZ_ASSERT(aFormData, "Must have FormData!");
if (mIsConstructingEntryList) {
// Step 2.2 of https://xhr.spec.whatwg.org/#dom-formdata.
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
AutoRestore<bool> resetConstructingEntryList(mIsConstructingEntryList);
mIsConstructingEntryList = true;
// This shouldn't be called recursively, so use a rather large value
// for the preallocated buffer.
AutoTArray<RefPtr<nsGenericHTMLFormElement>, 100> sortedControls;
nsresult rv = mControls->GetSortedControls(sortedControls);
NS_ENSURE_SUCCESS(rv, rv);
// Walk the list of nodes and call SubmitNamesValues() on the controls
for (nsGenericHTMLFormElement* control : sortedControls) {
// Disabled elements don't submit
if (!control->IsDisabled()) {
nsCOMPtr<nsIFormControl> fc = nsIFormControl::FromNode(control);
MOZ_ASSERT(fc);
// Tell the control to submit its name/value pairs to the submission
fc->SubmitNamesValues(aFormData);
}
}
FormDataEventInit init;
init.mBubbles = true;
init.mCancelable = false;
init.mFormData = aFormData;
RefPtr<FormDataEvent> event =
FormDataEvent::Constructor(this, u"formdata"_ns, init);
event->SetTrusted(true);
EventDispatcher::DispatchDOMEvent(this, nullptr, event, nullptr, nullptr);
return NS_OK;
}
NotNull<const Encoding*> HTMLFormElement::GetSubmitEncoding() {
nsAutoString acceptCharsetValue;
GetAttr(nsGkAtoms::acceptcharset, acceptCharsetValue);
int32_t charsetLen = acceptCharsetValue.Length();
if (charsetLen > 0) {
int32_t offset = 0;
int32_t spPos = 0;
// get charset from charsets one by one
do {
spPos = acceptCharsetValue.FindChar(char16_t(' '), offset);
int32_t cnt = ((-1 == spPos) ? (charsetLen - offset) : (spPos - offset));
if (cnt > 0) {
nsAutoString uCharset;
acceptCharsetValue.Mid(uCharset, offset, cnt);
auto encoding = Encoding::ForLabelNoReplacement(uCharset);
if (encoding) {
return WrapNotNull(encoding);
}
}
offset = spPos + 1;
} while (spPos != -1);
}
// if there are no accept-charset or all the charset are not supported
// Get the charset from document
Document* doc = GetComposedDoc();
if (doc) {
return doc->GetDocumentCharacterSet();
}
return UTF_8_ENCODING;
}
Element* HTMLFormElement::IndexedGetter(uint32_t aIndex, bool& aFound) {
Element* element = mControls->mElements->SafeElementAt(aIndex, nullptr);
aFound = element != nullptr;
return element;
}
#ifdef DEBUG
/**
* Checks that all form elements are in document order. Asserts if any pair of
* consecutive elements are not in increasing document order.
*
* @param aControls List of form controls to check.
* @param aForm Parent form of the controls.
*/
/* static */
void HTMLFormElement::AssertDocumentOrder(
const nsTArray<nsGenericHTMLFormElement*>& aControls, nsIContent* aForm) {
// TODO: remove the if directive with bug 598468.
// This is done to prevent asserts in some edge cases.
# if 0
// Only iterate if aControls is not empty, since otherwise
// |aControls.Length() - 1| will be a very large unsigned number... not what
// we want here.
if (!aControls.IsEmpty()) {
for (uint32_t i = 0; i < aControls.Length() - 1; ++i) {
NS_ASSERTION(
CompareFormControlPosition(aControls[i], aControls[i + 1], aForm) < 0,
"Form controls not ordered correctly");
}
}
# endif
}
/**
* Copy of the above function, but with RefPtrs.
*
* @param aControls List of form controls to check.
* @param aForm Parent form of the controls.
*/
/* static */
void HTMLFormElement::AssertDocumentOrder(
const nsTArray<RefPtr<nsGenericHTMLFormElement>>& aControls,
nsIContent* aForm) {
// TODO: remove the if directive with bug 598468.
// This is done to prevent asserts in some edge cases.
# if 0
// Only iterate if aControls is not empty, since otherwise
// |aControls.Length() - 1| will be a very large unsigned number... not what
// we want here.
if (!aControls.IsEmpty()) {
for (uint32_t i = 0; i < aControls.Length() - 1; ++i) {
NS_ASSERTION(
CompareFormControlPosition(aControls[i], aControls[i + 1], aForm) < 0,
"Form controls not ordered correctly");
}
}
# endif
}
#endif
nsresult HTMLFormElement::AddElement(nsGenericHTMLFormElement* aChild,
bool aUpdateValidity, bool aNotify) {
// If an element has a @form, we can assume it *might* be able to not have
// a parent and still be in the form.
NS_ASSERTION(aChild->HasAttr(nsGkAtoms::form) || aChild->GetParent(),
"Form control should have a parent");
nsCOMPtr<nsIFormControl> fc = nsIFormControl::FromNode(aChild);
MOZ_ASSERT(fc);
// Determine whether to add the new element to the elements or
// the not-in-elements list.
bool childInElements = HTMLFormControlsCollection::ShouldBeInElements(fc);
TreeOrderedArray<nsGenericHTMLFormElement*>& controlList =
childInElements ? mControls->mElements : mControls->mNotInElements;
const size_t insertedIndex = controlList.Insert(*aChild, this);
const bool lastElement = controlList->Length() == insertedIndex + 1;
#ifdef DEBUG
AssertDocumentOrder(controlList, this);
#endif
auto type = fc->ControlType();
// Default submit element handling
if (fc->IsSubmitControl()) {
// Update mDefaultSubmitElement, mFirstSubmitInElements,
// mFirstSubmitNotInElements.
nsGenericHTMLFormElement** firstSubmitSlot =
childInElements ? &mFirstSubmitInElements : &mFirstSubmitNotInElements;
// The new child is the new first submit in its list if the firstSubmitSlot
// is currently empty or if the child is before what's currently in the
// slot. Note that if we already have a control in firstSubmitSlot and
// we're appending this element can't possibly replace what's currently in
// the slot. Also note that aChild can't become the mDefaultSubmitElement
// unless it replaces what's in the slot. If it _does_ replace what's in
// the slot, it becomes the default submit if either the default submit is
// what's in the slot or the child is earlier than the default submit.
if (!*firstSubmitSlot ||
(!lastElement && nsContentUtils::CompareTreePosition<TreeKind::DOM>(
aChild, *firstSubmitSlot, this) < 0)) {
// Update mDefaultSubmitElement if it's currently in a valid state.
// Valid state means either non-null or null because there are in fact
// no submit elements around.
if ((mDefaultSubmitElement ||
(!mFirstSubmitInElements && !mFirstSubmitNotInElements)) &&
(*firstSubmitSlot == mDefaultSubmitElement ||
nsContentUtils::CompareTreePosition<TreeKind::DOM>(
aChild, mDefaultSubmitElement, this) < 0)) {
SetDefaultSubmitElement(aChild);
}
*firstSubmitSlot = aChild;
}
MOZ_ASSERT(mDefaultSubmitElement == mFirstSubmitInElements ||
mDefaultSubmitElement == mFirstSubmitNotInElements ||
!mDefaultSubmitElement,
"What happened here?");
}
// If the element is subject to constraint validaton and is invalid, we need
// to update our internal counter.
if (aUpdateValidity) {
nsCOMPtr<nsIConstraintValidation> cvElmt = do_QueryObject(aChild);
if (cvElmt && cvElmt->IsCandidateForConstraintValidation() &&
!cvElmt->IsValid()) {
UpdateValidity(false);
}
}
// Notify the radio button it's been added to a group
// This has to be done _after_ UpdateValidity() call to prevent the element
// being count twice.
if (type == FormControlType::InputRadio) {
RefPtr<HTMLInputElement> radio = static_cast<HTMLInputElement*>(aChild);
radio->AddToRadioGroup();
}
return NS_OK;
}
nsresult HTMLFormElement::AddElementToTable(nsGenericHTMLFormElement* aChild,
const nsAString& aName) {
return mControls->AddElementToTable(aChild, aName);
}
void HTMLFormElement::SetDefaultSubmitElement(
nsGenericHTMLFormElement* aElement) {
if (mDefaultSubmitElement) {
// It just so happens that a radio button or an <option> can't be our
// default submit element, so we can just blindly remove the bit.
mDefaultSubmitElement->RemoveStates(ElementState::DEFAULT);
}
mDefaultSubmitElement = aElement;
if (mDefaultSubmitElement) {
mDefaultSubmitElement->AddStates(ElementState::DEFAULT);
}
}
nsresult HTMLFormElement::RemoveElement(nsGenericHTMLFormElement* aChild,
bool aUpdateValidity) {
RemoveElementFromPastNamesMap(aChild);
//
// Remove it from the radio group if it's a radio button
//
nsresult rv = NS_OK;
nsCOMPtr<nsIFormControl> fc = nsIFormControl::FromNode(aChild);
MOZ_ASSERT(fc);
if (fc->ControlType() == FormControlType::InputRadio) {
RefPtr<HTMLInputElement> radio = static_cast<HTMLInputElement*>(aChild);
radio->RemoveFromRadioGroup();
}
// Determine whether to remove the child from the elements list
// or the not in elements list.
bool childInElements = HTMLFormControlsCollection::ShouldBeInElements(fc);
TreeOrderedArray<nsGenericHTMLFormElement*>& controls =
childInElements ? mControls->mElements : mControls->mNotInElements;
// Find the index of the child. This will be used later if necessary
// to find the default submit.
size_t index = controls->IndexOf(aChild);
NS_ENSURE_STATE(index != controls.AsList().NoIndex);
controls.RemoveElementAt(index);
// Update our mFirstSubmit* values.
nsGenericHTMLFormElement** firstSubmitSlot =
childInElements ? &mFirstSubmitInElements : &mFirstSubmitNotInElements;
if (aChild == *firstSubmitSlot) {
*firstSubmitSlot = nullptr;
// We are removing the first submit in this list, find the new first submit
uint32_t length = controls->Length();
for (uint32_t i = index; i < length; ++i) {
const auto* currentControl =
nsIFormControl::FromNode(controls->ElementAt(i));
MOZ_ASSERT(currentControl);
if (currentControl->IsSubmitControl()) {
*firstSubmitSlot = controls->ElementAt(i);
break;
}
}
}
if (aChild == mDefaultSubmitElement) {
// Need to reset mDefaultSubmitElement. Do this asynchronously so
// that we're not doing it while the DOM is in flux.
SetDefaultSubmitElement(nullptr);
nsContentUtils::AddScriptRunner(new RemoveElementRunnable(this));
// Note that we don't need to notify on the old default submit (which is
// being removed) because it's either being removed from the DOM or
// changing attributes in a way that makes it responsible for sending its
// own notifications.
}
// If the element was subject to constraint validation and is invalid, we need
// to update our internal counter.
if (aUpdateValidity) {
nsCOMPtr<nsIConstraintValidation> cvElmt = do_QueryObject(aChild);
if (cvElmt && cvElmt->IsCandidateForConstraintValidation() &&
!cvElmt->IsValid()) {
UpdateValidity(true);
}
}
return rv;
}
void HTMLFormElement::HandleDefaultSubmitRemoval() {
if (mDefaultSubmitElement) {
// Already got reset somehow; nothing else to do here
return;
}
nsGenericHTMLFormElement* newDefaultSubmit;
if (!mFirstSubmitNotInElements) {
newDefaultSubmit = mFirstSubmitInElements;
} else if (!mFirstSubmitInElements) {
newDefaultSubmit = mFirstSubmitNotInElements;
} else {
NS_ASSERTION(mFirstSubmitInElements != mFirstSubmitNotInElements,
"How did that happen?");
// Have both; use the earlier one
newDefaultSubmit =
nsContentUtils::CompareTreePosition<TreeKind::DOM>(
mFirstSubmitInElements, mFirstSubmitNotInElements, this) < 0
? mFirstSubmitInElements
: mFirstSubmitNotInElements;
}
SetDefaultSubmitElement(newDefaultSubmit);
MOZ_ASSERT(mDefaultSubmitElement == mFirstSubmitInElements ||
mDefaultSubmitElement == mFirstSubmitNotInElements,
"What happened here?");
}
nsresult HTMLFormElement::RemoveElementFromTableInternal(
nsInterfaceHashtable<nsStringHashKey, nsISupports>& aTable,
nsIContent* aChild, const nsAString& aName) {
auto entry = aTable.Lookup(aName);
if (!entry) {
return NS_OK;
}
// Single element in the hash, just remove it if it's the one
// we're trying to remove...
if (entry.Data() == aChild) {
entry.Remove();
++mExpandoAndGeneration.generation;
return NS_OK;
}
nsCOMPtr<nsIContent> content(do_QueryInterface(entry.Data()));
if (content) {
return NS_OK;
}
// If it's not a content node then it must be a RadioNodeList.
MOZ_ASSERT(nsCOMPtr<RadioNodeList>(do_QueryInterface(entry.Data())));
auto* list = static_cast<RadioNodeList*>(entry->get());
list->RemoveElement(aChild);
uint32_t length = list->Length();
if (!length) {
// If the list is empty we remove if from our hash, this shouldn't
// happen tho
entry.Remove();
++mExpandoAndGeneration.generation;
} else if (length == 1) {
// Only one element left, replace the list in the hash with the
// single element.
nsIContent* node = list->Item(0);
if (node) {
entry.Data() = node;
}
}
return NS_OK;
}
nsresult HTMLFormElement::RemoveElementFromTable(
nsGenericHTMLFormElement* aElement, const nsAString& aName) {
return mControls->RemoveElementFromTable(aElement, aName);
}
already_AddRefed<nsISupports> HTMLFormElement::NamedGetter(
const nsAString& aName, bool& aFound) {
aFound = true;
nsCOMPtr<nsISupports> result = DoResolveName(aName);
if (result) {
AddToPastNamesMap(aName, result);
return result.forget();
}
result = mImageNameLookupTable.GetWeak(aName);
if (result) {
AddToPastNamesMap(aName, result);
return result.forget();
}
result = mPastNameLookupTable.GetWeak(aName);
if (result) {
return result.forget();
}
aFound = false;
return nullptr;
}
void HTMLFormElement::GetSupportedNames(nsTArray<nsString>& aRetval) {
// TODO https://github.com/whatwg/html/issues/1731
}
already_AddRefed<nsISupports> HTMLFormElement::FindNamedItem(
const nsAString& aName, nsWrapperCache** aCache) {
// FIXME Get the wrapper cache from DoResolveName.
bool found;
nsCOMPtr<nsISupports> result = NamedGetter(aName, found);
if (result) {
*aCache = nullptr;
return result.forget();
}
return nullptr;
}
already_AddRefed<nsISupports> HTMLFormElement::DoResolveName(
const nsAString& aName) {
nsCOMPtr<nsISupports> result = mControls->NamedItemInternal(aName);
return result.forget();
}
void HTMLFormElement::OnSubmitClickBegin(Element* aOriginatingElement) {
mDeferSubmission = true;
// Prepare to run NotifySubmitObservers early before the
// scripts on the page get to modify the form data, possibly
// throwing off any password manager. (bug 257781)
nsCOMPtr<nsIURI> actionURI;
nsresult rv;
rv = GetActionURL(getter_AddRefs(actionURI), aOriginatingElement);
if (NS_FAILED(rv) || !actionURI) return;
// Notify observers of submit if the form is valid.
// TODO: checking for mInvalidElementsCount is a temporary fix that should be
// removed with bug 610402.
if (mInvalidElementsCount == 0) {
bool cancelSubmit = false;
rv = NotifySubmitObservers(actionURI, &cancelSubmit, true);
if (NS_SUCCEEDED(rv)) {
mNotifiedObservers = true;
mNotifiedObserversResult = cancelSubmit;
}
}
}
void HTMLFormElement::OnSubmitClickEnd() { mDeferSubmission = false; }
void HTMLFormElement::FlushPendingSubmission() {
MOZ_ASSERT(!mDeferSubmission);
if (mPendingSubmission) {
// Transfer owning reference so that the submission doesn't get deleted
// if we reenter
UniquePtr<HTMLFormSubmission> submission = std::move(mPendingSubmission);
SubmitSubmission(submission.get());
}
}
void HTMLFormElement::GetAction(nsString& aValue) {
if (!GetAttr(nsGkAtoms::action, aValue) || aValue.IsEmpty()) {
Document* document = OwnerDoc();
nsIURI* docURI = document->GetDocumentURI();
if (docURI) {
nsAutoCString spec;
nsresult rv = docURI->GetSpec(spec);
if (NS_FAILED(rv)) {
return;
}
CopyUTF8toUTF16(spec, aValue);
}
} else {
GetURIAttr(nsGkAtoms::action, nullptr, aValue);
}
}
nsresult HTMLFormElement::GetActionURL(nsIURI** aActionURL,
Element* aOriginatingElement) {
nsresult rv = NS_OK;
*aActionURL = nullptr;
//
// Grab the URL string
//
// If the originating element is a submit control and has the formaction
// attribute specified, it should be used. Otherwise, the action attribute
// from the form element should be used.
//
nsAutoString action;
if (aOriginatingElement &&
aOriginatingElement->HasAttr(nsGkAtoms::formaction)) {
#ifdef DEBUG
const auto* formControl = nsIFormControl::FromNode(aOriginatingElement);
NS_ASSERTION(formControl && formControl->IsSubmitControl(),
"The originating element must be a submit form control!");
#endif // DEBUG
HTMLInputElement* inputElement =
HTMLInputElement::FromNode(aOriginatingElement);
if (inputElement) {
inputElement->GetFormAction(action);
} else {
auto buttonElement = HTMLButtonElement::FromNode(aOriginatingElement);
if (buttonElement) {
buttonElement->GetFormAction(action);
} else {
NS_ERROR("Originating element must be an input or button element!");
return NS_ERROR_UNEXPECTED;
}
}
} else {
GetAction(action);
}
//
// Form the full action URL
//
// Get the document to form the URL.
// We'll also need it later to get the DOM window when notifying form submit
// observers (bug 33203)
if (!IsInComposedDoc()) {
return NS_OK; // No doc means don't submit, see Bug 28988
}
// Get base URL
Document* document = OwnerDoc();
nsIURI* docURI = document->GetDocumentURI();
NS_ENSURE_TRUE(docURI, NS_ERROR_UNEXPECTED);
// If an action is not specified and we are inside
// a HTML document then reload the URL. This makes us
// compatible with 4.x browsers.
// If we are in some other type of document such as XML or
// XUL, do nothing. This prevents undesirable reloading of
// a document inside XUL.
nsCOMPtr<nsIURI> actionURL;
if (action.IsEmpty()) {
if (!document->IsHTMLOrXHTML()) {
// Must be a XML, XUL or other non-HTML document type
// so do nothing.
return NS_OK;
}
actionURL = docURI;
} else {
nsIURI* baseURL = GetBaseURI();
NS_ASSERTION(baseURL, "No Base URL found in Form Submit!\n");
if (!baseURL) {
return NS_OK; // No base URL -> exit early, see Bug 30721
}
rv = NS_NewURI(getter_AddRefs(actionURL), action, nullptr, baseURL);
NS_ENSURE_SUCCESS(rv, rv);
}
//
// Verify the URL should be reached
//
// Get security manager, check to see if access to action URI is allowed.
//
nsIScriptSecurityManager* securityManager =
nsContentUtils::GetSecurityManager();
rv = securityManager->CheckLoadURIWithPrincipal(
NodePrincipal(), actionURL, nsIScriptSecurityManager::STANDARD,
OwnerDoc()->InnerWindowID());
NS_ENSURE_SUCCESS(rv, rv);
// Potentially the page uses the CSP directive 'upgrade-insecure-requests'. In
// such a case we have to upgrade the action url from http:// to https://.
// The upgrade is only required if the actionURL is http and not a potentially
// trustworthy loopback URI.
bool needsUpgrade =
actionURL->SchemeIs("http") &&
!nsMixedContentBlocker::IsPotentiallyTrustworthyLoopbackURL(actionURL) &&
document->GetUpgradeInsecureRequests(false);
if (needsUpgrade) {
// let's use the old specification before the upgrade for logging
AutoTArray<nsString, 2> params;
nsAutoCString spec;
rv = actionURL->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
CopyUTF8toUTF16(spec, *params.AppendElement());
// upgrade the actionURL from http:// to use https://
nsCOMPtr<nsIURI> upgradedActionURL;
rv = NS_GetSecureUpgradedURI(actionURL, getter_AddRefs(upgradedActionURL));
NS_ENSURE_SUCCESS(rv, rv);
actionURL = std::move(upgradedActionURL);
// let's log a message to the console that we are upgrading a request
nsAutoCString scheme;
rv = actionURL->GetScheme(scheme);
NS_ENSURE_SUCCESS(rv, rv);
CopyUTF8toUTF16(scheme, *params.AppendElement());
CSP_LogLocalizedStr(
"upgradeInsecureRequest", params,
""_ns, // aSourceFile
u""_ns, // aScriptSample
0, // aLineNumber
1, // aColumnNumber
nsIScriptError::warningFlag, "upgradeInsecureRequest"_ns,
document->InnerWindowID(),
document->NodePrincipal()->OriginAttributesRef().IsPrivateBrowsing());
}
//
// Assign to the output
//
actionURL.forget(aActionURL);
return rv;
}
void HTMLFormElement::GetSubmissionTarget(nsGenericHTMLElement* aSubmitter,
nsAString& aTarget) {
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#form-submission-algorithm
// 19. If the submitter element is a submit button and it has a formtarget
// attribute, then set formTarget to the formtarget attribute value.
// 20. Let target be the result of getting an element's target given
// submitter's form owner and formTarget.
//
// Note: Falling back to the base target is part of "get an element's target".
if (!(aSubmitter && aSubmitter->GetAttr(nsGkAtoms::formtarget, aTarget)) &&
!GetAttr(nsGkAtoms::target, aTarget)) {
GetBaseTarget(aTarget);
}
SanitizeLinkOrFormTarget(aTarget);
}
nsGenericHTMLFormElement* HTMLFormElement::GetDefaultSubmitElement() const {
MOZ_ASSERT(mDefaultSubmitElement == mFirstSubmitInElements ||
mDefaultSubmitElement == mFirstSubmitNotInElements,
"What happened here?");
return mDefaultSubmitElement;
}
bool HTMLFormElement::ImplicitSubmissionIsDisabled() const {
// Input text controls are always in the elements list.
uint32_t numDisablingControlsFound = 0;
uint32_t length = mControls->mElements->Length();
for (uint32_t i = 0; i < length && numDisablingControlsFound < 2; ++i) {
const auto* fc =
nsIFormControl::FromNode(mControls->mElements->ElementAt(i));
MOZ_ASSERT(fc);
if (fc->IsSingleLineTextControl(false)) {
numDisablingControlsFound++;
}
}
return numDisablingControlsFound != 1;
}
bool HTMLFormElement::IsLastActiveElement(
const nsGenericHTMLFormElement* aElement) const {
MOZ_ASSERT(aElement, "Unexpected call");
for (auto* element : Reversed(mControls->mElements.AsList())) {
const auto* fc = nsIFormControl::FromNode(element);
MOZ_ASSERT(fc);
// XXX How about date/time control?
if (fc->IsTextControl(false) && !element->IsDisabled()) {
return element == aElement;
}
}
return false;
}
int32_t HTMLFormElement::Length() { return mControls->Length(); }
void HTMLFormElement::ForgetCurrentSubmission() {
mNotifiedObservers = false;
mTargetContext = nullptr;
mCurrentLoadId = Nothing();
}
bool HTMLFormElement::CheckFormValidity(
nsTArray<RefPtr<Element>>* aInvalidElements) const {
bool ret = true;
// This shouldn't be called recursively, so use a rather large value
// for the preallocated buffer.
AutoTArray<RefPtr<nsGenericHTMLFormElement>, 100> sortedControls;
if (NS_FAILED(mControls->GetSortedControls(sortedControls))) {
return false;
}
uint32_t len = sortedControls.Length();
for (uint32_t i = 0; i < len; ++i) {
nsCOMPtr<nsIConstraintValidation> cvElmt =
do_QueryObject(sortedControls[i]);
bool defaultAction = true;
if (cvElmt && !cvElmt->CheckValidity(*sortedControls[i], &defaultAction)) {
ret = false;
// Add all unhandled invalid controls to aInvalidElements if the caller
// requested them.
if (defaultAction && aInvalidElements) {
aInvalidElements->AppendElement(sortedControls[i]);
}
}
}
return ret;
}
bool HTMLFormElement::CheckValidFormSubmission() {
/**
* Check for form validity: do not submit a form if there are unhandled
* invalid controls in the form.
* This should not be done if the form has been submitted with .submit() or
* has been submitted and novalidate/formnovalidate is used.
*
* NOTE: for the moment, we are also checking that whether the MozInvalidForm
* event gets prevented default so it will prevent blocking form submission if
* the browser does not have implemented a UI yet.
*
* TODO: the check for MozInvalidForm event should be removed later when HTML5
* Forms will be spread enough and authors will assume forms can't be
* submitted when invalid. See bug 587671.
*/
AutoTArray<RefPtr<Element>, 32> invalidElements;
if (CheckFormValidity(&invalidElements)) {
return true;
}
AutoJSAPI jsapi;
if (!jsapi.Init(GetOwnerGlobal())) {
return false;
}
JS::Rooted<JS::Value> detail(jsapi.cx());
if (!ToJSValue(jsapi.cx(), invalidElements, &detail)) {
return false;
}
RefPtr<CustomEvent> event =
NS_NewDOMCustomEvent(OwnerDoc(), nullptr, nullptr);
event->InitCustomEvent(jsapi.cx(), u"MozInvalidForm"_ns,
/* CanBubble */ true,
/* Cancelable */ true, detail);
event->SetTrusted(true);
event->WidgetEventPtr()->mFlags.mOnlyChromeDispatch = true;
DispatchEvent(*event);
ReportInvalidUnfocusableElements(std::move(invalidElements));
return !event->DefaultPrevented();
}
void HTMLFormElement::UpdateValidity(bool aElementValidity) {
if (aElementValidity) {
--mInvalidElementsCount;
} else {
++mInvalidElementsCount;
}
NS_ASSERTION(mInvalidElementsCount >= 0, "Something went seriously wrong!");
// The form validity has just changed if:
// - there are no more invalid elements ;
// - or there is one invalid elmement and an element just became invalid.
// If we have invalid elements and we used to before as well, do nothing.
if (mInvalidElementsCount &&
(mInvalidElementsCount != 1 || aElementValidity)) {
return;
}
AutoStateChangeNotifier notifier(*this, true);
RemoveStatesSilently(ElementState::VALID | ElementState::INVALID);
AddStatesSilently(mInvalidElementsCount ? ElementState::INVALID
: ElementState::VALID);
}
int32_t HTMLFormElement::IndexOfContent(nsIContent* aContent) {
int32_t index = 0;
return mControls->IndexOfContent(aContent, &index) == NS_OK ? index : 0;
}
void HTMLFormElement::Clear() {
for (HTMLImageElement* image : Reversed(mImageElements.AsList())) {
image->ClearForm(false);
}
mImageElements.Clear();
mImageNameLookupTable.Clear();
mPastNameLookupTable.Clear();
}
namespace {
struct PositionComparator {
nsIContent* const mElement;
explicit PositionComparator(nsIContent* const aElement)
: mElement(aElement) {}
int operator()(nsIContent* aElement) const {
if (mElement == aElement) {
return 0;
}
if (nsContentUtils::PositionIsBefore(mElement, aElement)) {
return -1;
}
return 1;
}
};
struct RadioNodeListAdaptor {
RadioNodeList* const mList;
explicit RadioNodeListAdaptor(RadioNodeList* aList) : mList(aList) {}
nsIContent* operator[](size_t aIdx) const { return mList->Item(aIdx); }
};
} // namespace
nsresult HTMLFormElement::AddElementToTableInternal(
nsInterfaceHashtable<nsStringHashKey, nsISupports>& aTable,
nsIContent* aChild, const nsAString& aName) {
return aTable.WithEntryHandle(aName, [&](auto&& entry) {
if (!entry) {
// No entry found, add the element
entry.Insert(aChild);
++mExpandoAndGeneration.generation;
} else {
// Found something in the hash, check its type
nsCOMPtr<nsIContent> content = do_QueryInterface(entry.Data());
if (content) {
// Check if the new content is the same as the one we found in the
// hash, if it is then we leave it in the hash as it is, this will
// happen if a form control has both a name and an id with the same
// value
if (content == aChild) {
return NS_OK;
}
// Found an element, create a list, add the element to the list and put
// the list in the hash
RadioNodeList* list = new RadioNodeList(this);
// If an element has a @form, we can assume it *might* be able to not
// have a parent and still be in the form.
NS_ASSERTION(
(content->IsElement() && content->AsElement()->HasAttr(
kNameSpaceID_None, nsGkAtoms::form)) ||
content->GetParent(),
"Item in list without parent");
// Determine the ordering between the new and old element.
bool newFirst = nsContentUtils::PositionIsBefore(aChild, content);
list->AppendElement(newFirst ? aChild : content.get());
list->AppendElement(newFirst ? content.get() : aChild);
nsCOMPtr<nsISupports> listSupports = do_QueryObject(list);
// Replace the element with the list.
entry.Data() = listSupports;
} else {
// There's already a list in the hash, add the child to the list.
MOZ_ASSERT(nsCOMPtr<RadioNodeList>(do_QueryInterface(entry.Data())));
auto* list = static_cast<RadioNodeList*>(entry->get());
NS_ASSERTION(
list->Length() > 1,
"List should have been converted back to a single element");
// Fast-path appends; this check is ok even if the child is
// already in the list, since if it tests true the child would
// have come at the end of the list, and the PositionIsBefore
// will test false.
if (nsContentUtils::PositionIsBefore(list->Item(list->Length() - 1),
aChild)) {
list->AppendElement(aChild);
return NS_OK;
}
// If a control has a name equal to its id, it could be in the
// list already.
if (list->IndexOf(aChild) != -1) {
return NS_OK;
}
size_t idx;
DebugOnly<bool> found =
BinarySearchIf(RadioNodeListAdaptor(list), 0, list->Length(),
PositionComparator(aChild), &idx);
MOZ_ASSERT(!found, "should not have found an element");
list->InsertElementAt(aChild, idx);
}
}
return NS_OK;
});
}
nsresult HTMLFormElement::AddImageElement(HTMLImageElement* aElement) {
mImageElements.Insert(*aElement, this);
return NS_OK;
}
nsresult HTMLFormElement::AddImageElementToTable(HTMLImageElement* aChild,
const nsAString& aName) {
return AddElementToTableInternal(mImageNameLookupTable, aChild, aName);
}
nsresult HTMLFormElement::RemoveImageElement(HTMLImageElement* aElement) {
RemoveElementFromPastNamesMap(aElement);
mImageElements.RemoveElement(*aElement);
return NS_OK;
}
nsresult HTMLFormElement::RemoveImageElementFromTable(
HTMLImageElement* aElement, const nsAString& aName) {
return RemoveElementFromTableInternal(mImageNameLookupTable, aElement, aName);
}
void HTMLFormElement::AddToPastNamesMap(const nsAString& aName,
nsISupports* aChild) {
// If candidates contains exactly one node. Add a mapping from name to the
// node in candidates in the form element's past names map, replacing the
// previous entry with the same name, if any.
nsCOMPtr<nsIContent> node = do_QueryInterface(aChild);
if (node) {
mPastNameLookupTable.InsertOrUpdate(aName, ToSupports(node));
node->SetFlags(MAY_BE_IN_PAST_NAMES_MAP);
}
}
void HTMLFormElement::RemoveElementFromPastNamesMap(Element* aElement) {
if (!aElement->HasFlag(MAY_BE_IN_PAST_NAMES_MAP)) {
return;
}
aElement->UnsetFlags(MAY_BE_IN_PAST_NAMES_MAP);
uint32_t oldCount = mPastNameLookupTable.Count();
for (auto iter = mPastNameLookupTable.Iter(); !iter.Done(); iter.Next()) {
if (aElement == iter.Data()) {
iter.Remove();
}
}
if (oldCount != mPastNameLookupTable.Count()) {
++mExpandoAndGeneration.generation;
}
}
JSObject* HTMLFormElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return HTMLFormElement_Binding::Wrap(aCx, this, aGivenProto);
}
int32_t HTMLFormElement::GetFormNumberForStateKey() {
if (mFormNumber == -1) {
mFormNumber = OwnerDoc()->GetNextFormNumber();
}
return mFormNumber;
}
void HTMLFormElement::NodeInfoChanged(Document* aOldDoc) {
nsGenericHTMLElement::NodeInfoChanged(aOldDoc);
// When a <form> element is adopted into a new document, we want any state
// keys generated from it to no longer consider this element to be parser
// inserted, and so have state keys based on the position of the <form>
// element in the document, rather than the order it was inserted in.
//
// This is not strictly necessary, since we only ever look at the form number
// for parser inserted form controls, and we do that at the time the form
// control element is inserted into its original document by the parser.
mFormNumber = -1;
}
bool HTMLFormElement::IsSubmitting() const {
bool loading = mTargetContext && !mTargetContext->IsDiscarded() &&
mCurrentLoadId &&
mTargetContext->IsLoadingIdentifier(*mCurrentLoadId);
return loading;
}
void HTMLFormElement::MaybeFireFormRemoved() {
// We want this event to be fired only when the form is removed from the DOM
// tree, not when it is released (ex, tab is closed). So don't fire an event
// when the form doesn't have a docshell.
Document* doc = GetComposedDoc();
nsIDocShell* container = doc ? doc->GetDocShell() : nullptr;
if (!container) {
return;
}
// Right now, only the password manager and formautofill listen to the event
// and only listen to it under certain circumstances. So don't fire this event
// unless necessary.
if (!doc->ShouldNotifyFormOrPasswordRemoved()) {
return;
}
AsyncEventDispatcher::RunDOMEventWhenSafe(
*this, u"DOMFormRemoved"_ns, CanBubble::eNo, ChromeOnlyDispatch::eYes);
}
} // namespace mozilla::dom
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