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https://github.com/roytam1/UXP.git
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Moonchild
824d0cad58
In order to tailor certain security checks to the caller that is attempting to load a particular piece of content, we need to be able to attach an appropriate triggering principal to the corresponding requests. Since most HTML content is loaded based on attribute values, this means capturing the subject principal of the caller who sets those attributes, which in turn means we need to make it available to `AfterSetAttr` hooks on all relevant element types.
374 lines
10 KiB
C++
374 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/BasicEvents.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/dom/HTMLFieldSetElement.h"
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#include "mozilla/dom/HTMLFieldSetElementBinding.h"
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#include "nsContentList.h"
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#include "nsQueryObject.h"
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NS_IMPL_NS_NEW_HTML_ELEMENT(FieldSet)
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namespace mozilla {
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namespace dom {
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HTMLFieldSetElement::HTMLFieldSetElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: nsGenericHTMLFormElement(aNodeInfo)
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, mElements(nullptr)
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, mFirstLegend(nullptr)
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, mInvalidElementsCount(0)
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{
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// <fieldset> is always barred from constraint validation.
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SetBarredFromConstraintValidation(true);
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// We start out enabled and valid.
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AddStatesSilently(NS_EVENT_STATE_ENABLED | NS_EVENT_STATE_VALID);
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}
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HTMLFieldSetElement::~HTMLFieldSetElement()
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{
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uint32_t length = mDependentElements.Length();
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for (uint32_t i = 0; i < length; ++i) {
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mDependentElements[i]->ForgetFieldSet(this);
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}
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}
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// nsISupports
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NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLFieldSetElement, nsGenericHTMLFormElement,
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mValidity, mElements)
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NS_IMPL_ADDREF_INHERITED(HTMLFieldSetElement, Element)
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NS_IMPL_RELEASE_INHERITED(HTMLFieldSetElement, Element)
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// QueryInterface implementation for HTMLFieldSetElement
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NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(HTMLFieldSetElement)
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NS_INTERFACE_TABLE_INHERITED(HTMLFieldSetElement,
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nsIDOMHTMLFieldSetElement,
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nsIConstraintValidation)
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NS_INTERFACE_TABLE_TAIL_INHERITING(nsGenericHTMLFormElement)
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NS_IMPL_ELEMENT_CLONE(HTMLFieldSetElement)
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NS_IMPL_BOOL_ATTR(HTMLFieldSetElement, Disabled, disabled)
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NS_IMPL_STRING_ATTR(HTMLFieldSetElement, Name, name)
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// nsIConstraintValidation
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NS_IMPL_NSICONSTRAINTVALIDATION(HTMLFieldSetElement)
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bool
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HTMLFieldSetElement::IsDisabledForEvents(WidgetEvent* aEvent)
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{
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return IsElementDisabledForEvents(aEvent, nullptr);
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}
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// nsIContent
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nsresult
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HTMLFieldSetElement::GetEventTargetParent(EventChainPreVisitor& aVisitor)
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{
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// Do not process any DOM events if the element is disabled.
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aVisitor.mCanHandle = false;
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if (IsDisabledForEvents(aVisitor.mEvent)) {
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return NS_OK;
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}
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return nsGenericHTMLFormElement::GetEventTargetParent(aVisitor);
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}
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nsresult
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HTMLFieldSetElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue,
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nsIPrincipal* aSubjectPrincipal,
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bool aNotify)
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{
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if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::disabled &&
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nsINode::GetFirstChild()) {
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if (!mElements) {
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mElements = new nsContentList(this, MatchListedElements, nullptr, nullptr,
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true);
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}
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uint32_t length = mElements->Length(true);
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for (uint32_t i=0; i<length; ++i) {
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static_cast<nsGenericHTMLFormElement*>(mElements->Item(i))
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->FieldSetDisabledChanged(aNotify);
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}
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}
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return nsGenericHTMLFormElement::AfterSetAttr(aNameSpaceID, aName,
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aValue, aOldValue,
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aSubjectPrincipal, aNotify);
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}
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// nsIDOMHTMLFieldSetElement
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NS_IMETHODIMP
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HTMLFieldSetElement::GetForm(nsIDOMHTMLFormElement** aForm)
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{
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return nsGenericHTMLFormElement::GetForm(aForm);
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}
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NS_IMETHODIMP
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HTMLFieldSetElement::GetType(nsAString& aType)
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{
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aType.AssignLiteral("fieldset");
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return NS_OK;
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}
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/* static */
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bool
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HTMLFieldSetElement::MatchListedElements(Element* aElement, int32_t aNamespaceID,
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nsIAtom* aAtom, void* aData)
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{
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nsCOMPtr<nsIFormControl> formControl = do_QueryInterface(aElement);
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return formControl;
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}
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NS_IMETHODIMP
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HTMLFieldSetElement::GetElements(nsIDOMHTMLCollection** aElements)
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{
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NS_ADDREF(*aElements = Elements());
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return NS_OK;
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}
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nsIHTMLCollection*
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HTMLFieldSetElement::Elements()
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{
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if (!mElements) {
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mElements = new nsContentList(this, MatchListedElements, nullptr, nullptr,
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true);
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}
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return mElements;
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}
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// nsIFormControl
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nsresult
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HTMLFieldSetElement::Reset()
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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HTMLFieldSetElement::SubmitNamesValues(HTMLFormSubmission* aFormSubmission)
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{
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return NS_OK;
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}
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nsresult
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HTMLFieldSetElement::InsertChildAt(nsIContent* aChild, uint32_t aIndex,
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bool aNotify)
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{
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bool firstLegendHasChanged = false;
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if (aChild->IsHTMLElement(nsGkAtoms::legend)) {
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if (!mFirstLegend) {
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mFirstLegend = aChild;
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// We do not want to notify the first time mFirstElement is set.
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} else {
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// If mFirstLegend is before aIndex, we do not change it.
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// Otherwise, mFirstLegend is now aChild.
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if (int32_t(aIndex) <= IndexOf(mFirstLegend)) {
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mFirstLegend = aChild;
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firstLegendHasChanged = true;
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}
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}
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}
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nsresult rv = nsGenericHTMLFormElement::InsertChildAt(aChild, aIndex, aNotify);
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NS_ENSURE_SUCCESS(rv, rv);
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if (firstLegendHasChanged) {
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NotifyElementsForFirstLegendChange(aNotify);
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}
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return rv;
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}
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void
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HTMLFieldSetElement::RemoveChildAt(uint32_t aIndex, bool aNotify)
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{
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bool firstLegendHasChanged = false;
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if (mFirstLegend && (GetChildAt(aIndex) == mFirstLegend)) {
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// If we are removing the first legend we have to found another one.
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nsIContent* child = mFirstLegend->GetNextSibling();
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mFirstLegend = nullptr;
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firstLegendHasChanged = true;
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for (; child; child = child->GetNextSibling()) {
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if (child->IsHTMLElement(nsGkAtoms::legend)) {
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mFirstLegend = child;
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break;
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}
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}
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}
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nsGenericHTMLFormElement::RemoveChildAt(aIndex, aNotify);
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if (firstLegendHasChanged) {
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NotifyElementsForFirstLegendChange(aNotify);
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}
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}
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void
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HTMLFieldSetElement::AddElement(nsGenericHTMLFormElement* aElement)
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{
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mDependentElements.AppendElement(aElement);
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// If the element that we are adding aElement is a fieldset, then all the
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// invalid elements in aElement are also invalid elements of this.
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HTMLFieldSetElement* fieldSet = FromContent(aElement);
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if (fieldSet) {
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for (int32_t i = 0; i < fieldSet->mInvalidElementsCount; i++) {
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UpdateValidity(false);
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}
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return;
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}
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// We need to update the validity of the fieldset.
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nsCOMPtr<nsIConstraintValidation> cvElmt = do_QueryObject(aElement);
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if (cvElmt &&
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cvElmt->IsCandidateForConstraintValidation() && !cvElmt->IsValid()) {
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UpdateValidity(false);
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}
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#if DEBUG
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int32_t debugInvalidElementsCount = 0;
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for (uint32_t i = 0; i < mDependentElements.Length(); i++) {
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HTMLFieldSetElement* fieldSet = FromContent(mDependentElements[i]);
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if (fieldSet) {
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debugInvalidElementsCount += fieldSet->mInvalidElementsCount;
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continue;
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}
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nsCOMPtr<nsIConstraintValidation>
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cvElmt = do_QueryObject(mDependentElements[i]);
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if (cvElmt &&
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cvElmt->IsCandidateForConstraintValidation() &&
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!(cvElmt->IsValid())) {
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debugInvalidElementsCount += 1;
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}
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}
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MOZ_ASSERT(debugInvalidElementsCount == mInvalidElementsCount);
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#endif
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}
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void
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HTMLFieldSetElement::RemoveElement(nsGenericHTMLFormElement* aElement)
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{
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mDependentElements.RemoveElement(aElement);
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// If the element that we are removing aElement is a fieldset, then all the
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// invalid elements in aElement are also removed from this.
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HTMLFieldSetElement* fieldSet = FromContent(aElement);
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if (fieldSet) {
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for (int32_t i = 0; i < fieldSet->mInvalidElementsCount; i++) {
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UpdateValidity(true);
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}
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return;
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}
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// We need to update the validity of the fieldset.
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nsCOMPtr<nsIConstraintValidation> cvElmt = do_QueryObject(aElement);
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if (cvElmt &&
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cvElmt->IsCandidateForConstraintValidation() && !cvElmt->IsValid()) {
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UpdateValidity(true);
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}
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#if DEBUG
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int32_t debugInvalidElementsCount = 0;
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for (uint32_t i = 0; i < mDependentElements.Length(); i++) {
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HTMLFieldSetElement* fieldSet = FromContent(mDependentElements[i]);
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if (fieldSet) {
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debugInvalidElementsCount += fieldSet->mInvalidElementsCount;
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continue;
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}
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nsCOMPtr<nsIConstraintValidation>
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cvElmt = do_QueryObject(mDependentElements[i]);
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if (cvElmt &&
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cvElmt->IsCandidateForConstraintValidation() &&
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!(cvElmt->IsValid())) {
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debugInvalidElementsCount += 1;
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}
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}
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MOZ_ASSERT(debugInvalidElementsCount == mInvalidElementsCount);
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#endif
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}
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void
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HTMLFieldSetElement::NotifyElementsForFirstLegendChange(bool aNotify)
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{
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/**
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* NOTE: this could be optimized if only call when the fieldset is currently
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* disabled.
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* This should also make sure that mElements is set when we happen to be here.
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* However, this method shouldn't be called very often in normal use cases.
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*/
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if (!mElements) {
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mElements = new nsContentList(this, MatchListedElements, nullptr, nullptr,
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true);
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}
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uint32_t length = mElements->Length(true);
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for (uint32_t i = 0; i < length; ++i) {
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static_cast<nsGenericHTMLFormElement*>(mElements->Item(i))
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->FieldSetFirstLegendChanged(aNotify);
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}
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}
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void
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HTMLFieldSetElement::UpdateValidity(bool aElementValidity)
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{
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if (aElementValidity) {
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--mInvalidElementsCount;
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} else {
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++mInvalidElementsCount;
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}
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MOZ_ASSERT(mInvalidElementsCount >= 0);
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// The fieldset validity has just changed if:
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// - there are no more invalid elements ;
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// - or there is one invalid elmement and an element just became invalid.
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if (!mInvalidElementsCount || (mInvalidElementsCount == 1 && !aElementValidity)) {
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UpdateState(true);
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}
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// We should propagate the change to the fieldset parent chain.
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if (mFieldSet) {
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mFieldSet->UpdateValidity(aElementValidity);
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}
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return;
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}
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EventStates
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HTMLFieldSetElement::IntrinsicState() const
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{
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EventStates state = nsGenericHTMLFormElement::IntrinsicState();
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if (mInvalidElementsCount) {
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state |= NS_EVENT_STATE_INVALID;
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} else {
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state |= NS_EVENT_STATE_VALID;
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}
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return state;
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}
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JSObject*
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HTMLFieldSetElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return HTMLFieldSetElementBinding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace dom
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} // namespace mozilla
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