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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=78: */
/* 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 "nsHtml5TreeOperation.h"
#include "mozAutoDocUpdate.h"
#include "mozilla/CycleCollectedJSContext.h"
#include "mozilla/Likely.h"
#include "mozilla/dom/Comment.h"
#include "mozilla/dom/CustomElementRegistry.h"
#include "mozilla/dom/DocumentType.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/LinkStyle.h"
#include "mozilla/dom/HTMLFormElement.h"
#include "mozilla/dom/HTMLImageElement.h"
#include "mozilla/dom/HTMLTemplateElement.h"
#include "mozilla/dom/MutationObservers.h"
#include "mozilla/dom/Text.h"
#include "nsAttrName.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentUtils.h"
#include "nsDocElementCreatedNotificationRunner.h"
#include "nsEscape.h"
#include "nsHtml5AutoPauseUpdate.h"
#include "nsHtml5DocumentMode.h"
#include "nsHtml5HtmlAttributes.h"
#include "nsHtml5SVGLoadDispatcher.h"
#include "nsHtml5TreeBuilder.h"
#include "nsIDTD.h"
#include "nsIFormControl.h"
#include "nsIMutationObserver.h"
#include "nsINode.h"
#include "nsIProtocolHandler.h"
#include "nsIScriptElement.h"
#include "nsISupportsImpl.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
#include "nsTextNode.h"
using namespace mozilla;
using namespace mozilla::dom;
using mozilla::dom::Document;
/**
* Helper class that opens a notification batch if the current doc
* is different from the executor doc.
*/
class MOZ_STACK_CLASS nsHtml5OtherDocUpdate {
public:
nsHtml5OtherDocUpdate(Document* aCurrentDoc, Document* aExecutorDoc) {
MOZ_ASSERT(aCurrentDoc, "Node has no doc?");
MOZ_ASSERT(aExecutorDoc, "Executor has no doc?");
if (MOZ_LIKELY(aCurrentDoc == aExecutorDoc)) {
mDocument = nullptr;
} else {
mDocument = aCurrentDoc;
aCurrentDoc->BeginUpdate();
}
}
~nsHtml5OtherDocUpdate() {
if (MOZ_UNLIKELY(mDocument)) {
mDocument->EndUpdate();
}
}
private:
RefPtr<Document> mDocument;
};
nsHtml5TreeOperation::nsHtml5TreeOperation() : mOperation(uninitialized()) {
MOZ_COUNT_CTOR(nsHtml5TreeOperation);
}
nsHtml5TreeOperation::~nsHtml5TreeOperation() {
MOZ_COUNT_DTOR(nsHtml5TreeOperation);
struct TreeOperationMatcher {
void operator()(const opAppend& aOperation) {}
void operator()(const opDetach& aOperation) {}
void operator()(const opAppendChildrenToNewParent& aOperation) {}
void operator()(const opFosterParent& aOperation) {}
void operator()(const opAppendToDocument& aOperation) {}
void operator()(const opAddAttributes& aOperation) {
delete aOperation.mAttributes;
}
void operator()(const nsHtml5DocumentMode& aMode) {}
void operator()(const opCreateHTMLElement& aOperation) {
aOperation.mName->Release();
delete aOperation.mAttributes;
}
void operator()(const opCreateSVGElement& aOperation) {
aOperation.mName->Release();
delete aOperation.mAttributes;
}
void operator()(const opCreateMathMLElement& aOperation) {
aOperation.mName->Release();
delete aOperation.mAttributes;
}
void operator()(const opSetFormElement& aOperation) {}
void operator()(const opAppendText& aOperation) {
delete[] aOperation.mBuffer;
}
void operator()(const opFosterParentText& aOperation) {
delete[] aOperation.mBuffer;
}
void operator()(const opAppendComment& aOperation) {
delete[] aOperation.mBuffer;
}
void operator()(const opAppendCommentToDocument& aOperation) {
delete[] aOperation.mBuffer;
}
void operator()(const opAppendDoctypeToDocument& aOperation) {
aOperation.mName->Release();
delete aOperation.mStringPair;
}
void operator()(const opGetDocumentFragmentForTemplate& aOperation) {}
void operator()(const opGetFosterParent& aOperation) {}
void operator()(const opMarkAsBroken& aOperation) {}
void operator()(const opRunScript& aOperation) {}
void operator()(const opRunScriptAsyncDefer& aOperation) {}
void operator()(const opPreventScriptExecution& aOperation) {}
void operator()(const opDoneAddingChildren& aOperation) {}
void operator()(const opDoneCreatingElement& aOperation) {}
void operator()(const opSetDocumentCharset& aOperation) {}
void operator()(const opCharsetSwitchTo& aOperation) {}
void operator()(const opUpdateStyleSheet& aOperation) {}
void operator()(const opProcessOfflineManifest& aOperation) {
free(aOperation.mUrl);
}
void operator()(const opMarkMalformedIfScript& aOperation) {}
void operator()(const opStreamEnded& aOperation) {}
void operator()(const opSetStyleLineNumber& aOperation) {}
void operator()(const opSetScriptLineNumberAndFreeze& aOperation) {}
void operator()(const opSvgLoad& aOperation) {}
void operator()(const opMaybeComplainAboutCharset& aOperation) {}
void operator()(const opMaybeComplainAboutDeepTree& aOperation) {}
void operator()(const opAddClass& aOperation) {}
void operator()(const opAddViewSourceHref& aOperation) {
delete[] aOperation.mBuffer;
}
void operator()(const opAddViewSourceBase& aOperation) {
delete[] aOperation.mBuffer;
}
void operator()(const opAddErrorType& aOperation) {
if (aOperation.mName) {
aOperation.mName->Release();
}
if (aOperation.mOther) {
aOperation.mOther->Release();
}
}
void operator()(const opAddLineNumberId& aOperation) {}
void operator()(const opStartLayout& aOperation) {}
void operator()(const opEnableEncodingMenu& aOperation) {}
void operator()(const uninitialized& aOperation) {
NS_WARNING("Uninitialized tree op.");
}
};
mOperation.match(TreeOperationMatcher());
}
nsresult nsHtml5TreeOperation::AppendTextToTextNode(
const char16_t* aBuffer, uint32_t aLength, dom::Text* aTextNode,
nsHtml5DocumentBuilder* aBuilder) {
MOZ_ASSERT(aTextNode, "Got null text node.");
MOZ_ASSERT(aBuilder);
MOZ_ASSERT(aBuilder->IsInDocUpdate());
uint32_t oldLength = aTextNode->TextLength();
CharacterDataChangeInfo info = {true, oldLength, oldLength, aLength};
MutationObservers::NotifyCharacterDataWillChange(aTextNode, info);
nsresult rv = aTextNode->AppendText(aBuffer, aLength, false);
NS_ENSURE_SUCCESS(rv, rv);
MutationObservers::NotifyCharacterDataChanged(aTextNode, info);
return rv;
}
nsresult nsHtml5TreeOperation::AppendText(const char16_t* aBuffer,
uint32_t aLength, nsIContent* aParent,
nsHtml5DocumentBuilder* aBuilder) {
nsresult rv = NS_OK;
nsIContent* lastChild = aParent->GetLastChild();
if (lastChild && lastChild->IsText()) {
nsHtml5OtherDocUpdate update(aParent->OwnerDoc(), aBuilder->GetDocument());
return AppendTextToTextNode(aBuffer, aLength, lastChild->GetAsText(),
aBuilder);
}
nsNodeInfoManager* nodeInfoManager = aParent->OwnerDoc()->NodeInfoManager();
RefPtr<nsTextNode> text = new (nodeInfoManager) nsTextNode(nodeInfoManager);
NS_ASSERTION(text, "Infallible malloc failed?");
rv = text->SetText(aBuffer, aLength, false);
NS_ENSURE_SUCCESS(rv, rv);
return Append(text, aParent, aBuilder);
}
nsresult nsHtml5TreeOperation::Append(nsIContent* aNode, nsIContent* aParent,
nsHtml5DocumentBuilder* aBuilder) {
MOZ_ASSERT(aBuilder);
MOZ_ASSERT(aBuilder->IsInDocUpdate());
nsresult rv = NS_OK;
nsHtml5OtherDocUpdate update(aParent->OwnerDoc(), aBuilder->GetDocument());
rv = aParent->AppendChildTo(aNode, false);
if (NS_SUCCEEDED(rv)) {
aNode->SetParserHasNotified();
MutationObservers::NotifyContentAppended(aParent, aNode);
}
return rv;
}
nsresult nsHtml5TreeOperation::Append(nsIContent* aNode, nsIContent* aParent,
mozilla::dom::FromParser aFromParser,
nsHtml5DocumentBuilder* aBuilder) {
Maybe<nsHtml5AutoPauseUpdate> autoPause;
Maybe<dom::AutoCEReaction> autoCEReaction;
dom::DocGroup* docGroup = aParent->OwnerDoc()->GetDocGroup();
if (docGroup && aFromParser != mozilla::dom::FROM_PARSER_FRAGMENT) {
autoCEReaction.emplace(docGroup->CustomElementReactionsStack(), nullptr);
}
nsresult rv = Append(aNode, aParent, aBuilder);
// Pause the parser only when there are reactions to be invoked to avoid
// pausing parsing too aggressive.
if (autoCEReaction.isSome() && docGroup &&
docGroup->CustomElementReactionsStack()
->IsElementQueuePushedForCurrentRecursionDepth()) {
autoPause.emplace(aBuilder);
}
return rv;
}
nsresult nsHtml5TreeOperation::AppendToDocument(
nsIContent* aNode, nsHtml5DocumentBuilder* aBuilder) {
MOZ_ASSERT(aBuilder);
MOZ_ASSERT(aBuilder->GetDocument() == aNode->OwnerDoc());
MOZ_ASSERT(aBuilder->IsInDocUpdate());
nsresult rv = NS_OK;
Document* doc = aBuilder->GetDocument();
rv = doc->AppendChildTo(aNode, false);
if (rv == NS_ERROR_DOM_HIERARCHY_REQUEST_ERR) {
aNode->SetParserHasNotified();
return NS_OK;
}
NS_ENSURE_SUCCESS(rv, rv);
aNode->SetParserHasNotified();
MutationObservers::NotifyContentInserted(doc, aNode);
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
"Someone forgot to block scripts");
if (aNode->IsElement()) {
nsContentUtils::AddScriptRunner(
new nsDocElementCreatedNotificationRunner(doc));
}
return rv;
}
static bool IsElementOrTemplateContent(nsINode* aNode) {
if (aNode) {
if (aNode->IsElement()) {
return true;
}
if (aNode->IsDocumentFragment()) {
// Check if the node is a template content.
nsIContent* fragHost = aNode->AsDocumentFragment()->GetHost();
if (fragHost && fragHost->IsTemplateElement()) {
return true;
}
}
}
return false;
}
void nsHtml5TreeOperation::Detach(nsIContent* aNode,
nsHtml5DocumentBuilder* aBuilder) {
MOZ_ASSERT(aBuilder);
MOZ_ASSERT(aBuilder->IsInDocUpdate());
nsCOMPtr<nsINode> parent = aNode->GetParentNode();
if (parent) {
nsHtml5OtherDocUpdate update(parent->OwnerDoc(), aBuilder->GetDocument());
parent->RemoveChildNode(aNode, true);
}
}
nsresult nsHtml5TreeOperation::AppendChildrenToNewParent(
nsIContent* aNode, nsIContent* aParent, nsHtml5DocumentBuilder* aBuilder) {
MOZ_ASSERT(aBuilder);
MOZ_ASSERT(aBuilder->IsInDocUpdate());
nsHtml5OtherDocUpdate update(aParent->OwnerDoc(), aBuilder->GetDocument());
bool didAppend = false;
while (aNode->HasChildren()) {
nsCOMPtr<nsIContent> child = aNode->GetFirstChild();
aNode->RemoveChildNode(child, true);
nsresult rv = aParent->AppendChildTo(child, false);
NS_ENSURE_SUCCESS(rv, rv);
didAppend = true;
}
if (didAppend) {
MutationObservers::NotifyContentAppended(aParent, aParent->GetLastChild());
}
return NS_OK;
}
nsresult nsHtml5TreeOperation::FosterParent(nsIContent* aNode,
nsIContent* aParent,
nsIContent* aTable,
nsHtml5DocumentBuilder* aBuilder) {
MOZ_ASSERT(aBuilder);
MOZ_ASSERT(aBuilder->IsInDocUpdate());
nsIContent* foster = aTable->GetParent();
if (IsElementOrTemplateContent(foster)) {
nsHtml5OtherDocUpdate update(foster->OwnerDoc(), aBuilder->GetDocument());
nsresult rv = foster->InsertChildBefore(aNode, aTable, false);
NS_ENSURE_SUCCESS(rv, rv);
MutationObservers::NotifyContentInserted(foster, aNode);
return rv;
}
return Append(aNode, aParent, aBuilder);
}
nsresult nsHtml5TreeOperation::AddAttributes(nsIContent* aNode,
nsHtml5HtmlAttributes* aAttributes,
nsHtml5DocumentBuilder* aBuilder) {
dom::Element* node = aNode->AsElement();
nsHtml5OtherDocUpdate update(node->OwnerDoc(), aBuilder->GetDocument());
int32_t len = aAttributes->getLength();
for (int32_t i = len; i > 0;) {
--i;
nsAtom* localName = aAttributes->getLocalNameNoBoundsCheck(i);
int32_t nsuri = aAttributes->getURINoBoundsCheck(i);
if (!node->HasAttr(nsuri, localName)) {
nsString value; // Not Auto, because using it to hold nsStringBuffer*
aAttributes->getValueNoBoundsCheck(i).ToString(value);
node->SetAttr(nsuri, localName, aAttributes->getPrefixNoBoundsCheck(i),
value, true);
// XXX what to do with nsresult?
}
}
return NS_OK;
}
void nsHtml5TreeOperation::SetHTMLElementAttributes(
dom::Element* aElement, nsAtom* aName, nsHtml5HtmlAttributes* aAttributes) {
int32_t len = aAttributes->getLength();
for (int32_t i = 0; i < len; i++) {
nsHtml5String val = aAttributes->getValueNoBoundsCheck(i);
nsAtom* klass = val.MaybeAsAtom();
if (klass) {
aElement->SetSingleClassFromParser(klass);
} else {
nsAtom* localName = aAttributes->getLocalNameNoBoundsCheck(i);
nsAtom* prefix = aAttributes->getPrefixNoBoundsCheck(i);
int32_t nsuri = aAttributes->getURINoBoundsCheck(i);
nsString value; // Not Auto, because using it to hold nsStringBuffer*
val.ToString(value);
if (nsGkAtoms::a == aName && nsGkAtoms::name == localName) {
// This is an HTML5-incompliant Geckoism.
// Remove when fixing bug 582361
NS_ConvertUTF16toUTF8 cname(value);
NS_ConvertUTF8toUTF16 uv(nsUnescape(cname.BeginWriting()));
aElement->SetAttr(nsuri, localName, prefix, uv, false);
} else {
aElement->SetAttr(nsuri, localName, prefix, value, false);
}
}
}
}
nsIContent* nsHtml5TreeOperation::CreateHTMLElement(
nsAtom* aName, nsHtml5HtmlAttributes* aAttributes,
mozilla::dom::FromParser aFromParser, nsNodeInfoManager* aNodeInfoManager,
nsHtml5DocumentBuilder* aBuilder,
mozilla::dom::HTMLContentCreatorFunction aCreator) {
RefPtr<dom::NodeInfo> nodeInfo = aNodeInfoManager->GetNodeInfo(
aName, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);
NS_ASSERTION(nodeInfo, "Got null nodeinfo.");
dom::Element* newContent = nullptr;
Document* document = nodeInfo->GetDocument();
bool willExecuteScript = false;
bool isCustomElement = false;
RefPtr<nsAtom> isAtom;
dom::CustomElementDefinition* definition = nullptr;
if (aAttributes) {
nsHtml5String is = aAttributes->getValue(nsHtml5AttributeName::ATTR_IS);
if (is) {
nsAutoString isValue;
is.ToString(isValue);
isAtom = NS_Atomize(isValue);
}
}
isCustomElement = (aCreator == NS_NewCustomElement || isAtom);
if (isCustomElement && aFromParser != dom::FROM_PARSER_FRAGMENT) {
RefPtr<nsAtom> tagAtom = nodeInfo->NameAtom();
RefPtr<nsAtom> typeAtom =
(aCreator == NS_NewCustomElement) ? tagAtom : isAtom;
MOZ_ASSERT(nodeInfo->NameAtom()->Equals(nodeInfo->LocalName()));
definition = nsContentUtils::LookupCustomElementDefinition(
document, nodeInfo->NameAtom(), nodeInfo->NamespaceID(), typeAtom);
if (definition) {
willExecuteScript = true;
}
}
if (willExecuteScript) { // This will cause custom element constructors to
// run
mozilla::dom::AutoSetThrowOnDynamicMarkupInsertionCounter
throwOnDynamicMarkupInsertionCounter(document);
nsHtml5AutoPauseUpdate autoPauseContentUpdate(aBuilder);
{ nsAutoMicroTask mt; }
dom::AutoCEReaction autoCEReaction(
document->GetDocGroup()->CustomElementReactionsStack(), nullptr);
nsCOMPtr<dom::Element> newElement;
NS_NewHTMLElement(getter_AddRefs(newElement), nodeInfo.forget(),
aFromParser, isAtom, definition);
MOZ_ASSERT(newElement, "Element creation created null pointer.");
newContent = newElement;
aBuilder->HoldElement(newElement.forget());
if (MOZ_UNLIKELY(aName == nsGkAtoms::style || aName == nsGkAtoms::link)) {
if (auto* linkStyle = dom::LinkStyle::FromNode(*newContent)) {
linkStyle->SetEnableUpdates(false);
}
}
if (!aAttributes) {
return newContent;
}
SetHTMLElementAttributes(newContent, aName, aAttributes);
} else {
nsCOMPtr<dom::Element> newElement;
if (isCustomElement) {
NS_NewHTMLElement(getter_AddRefs(newElement), nodeInfo.forget(),
aFromParser, isAtom, definition);
} else {
newElement = aCreator(nodeInfo.forget(), aFromParser);
}
MOZ_ASSERT(newElement, "Element creation created null pointer.");
newContent = newElement;
aBuilder->HoldElement(newElement.forget());
if (MOZ_UNLIKELY(aName == nsGkAtoms::style || aName == nsGkAtoms::link)) {
if (auto* linkStyle = dom::LinkStyle::FromNode(*newContent)) {
linkStyle->SetEnableUpdates(false);
}
}
if (!aAttributes) {
return newContent;
}
SetHTMLElementAttributes(newContent, aName, aAttributes);
}
return newContent;
}
nsIContent* nsHtml5TreeOperation::CreateSVGElement(
nsAtom* aName, nsHtml5HtmlAttributes* aAttributes,
mozilla::dom::FromParser aFromParser, nsNodeInfoManager* aNodeInfoManager,
nsHtml5DocumentBuilder* aBuilder,
mozilla::dom::SVGContentCreatorFunction aCreator) {
nsCOMPtr<nsIContent> newElement;
if (MOZ_LIKELY(aNodeInfoManager->SVGEnabled())) {
RefPtr<dom::NodeInfo> nodeInfo = aNodeInfoManager->GetNodeInfo(
aName, nullptr, kNameSpaceID_SVG, nsINode::ELEMENT_NODE);
MOZ_ASSERT(nodeInfo, "Got null nodeinfo.");
mozilla::DebugOnly<nsresult> rv =
aCreator(getter_AddRefs(newElement), nodeInfo.forget(), aFromParser);
MOZ_ASSERT(NS_SUCCEEDED(rv) && newElement);
} else {
RefPtr<dom::NodeInfo> nodeInfo = aNodeInfoManager->GetNodeInfo(
aName, nullptr, kNameSpaceID_disabled_SVG, nsINode::ELEMENT_NODE);
MOZ_ASSERT(nodeInfo, "Got null nodeinfo.");
// The mismatch between NS_NewXMLElement and SVGContentCreatorFunction
// argument types is annoying.
nsCOMPtr<dom::Element> xmlElement;
mozilla::DebugOnly<nsresult> rv =
NS_NewXMLElement(getter_AddRefs(xmlElement), nodeInfo.forget());
MOZ_ASSERT(NS_SUCCEEDED(rv) && xmlElement);
newElement = xmlElement;
}
dom::Element* newContent = newElement->AsElement();
aBuilder->HoldElement(newElement.forget());
if (MOZ_UNLIKELY(aName == nsGkAtoms::style)) {
if (auto* linkStyle = dom::LinkStyle::FromNode(*newContent)) {
linkStyle->SetEnableUpdates(false);
}
}
if (!aAttributes) {
return newContent;
}
int32_t len = aAttributes->getLength();
for (int32_t i = 0; i < len; i++) {
nsHtml5String val = aAttributes->getValueNoBoundsCheck(i);
nsAtom* klass = val.MaybeAsAtom();
if (klass) {
newContent->SetSingleClassFromParser(klass);
} else {
nsAtom* localName = aAttributes->getLocalNameNoBoundsCheck(i);
nsAtom* prefix = aAttributes->getPrefixNoBoundsCheck(i);
int32_t nsuri = aAttributes->getURINoBoundsCheck(i);
nsString value; // Not Auto, because using it to hold nsStringBuffer*
val.ToString(value);
newContent->SetAttr(nsuri, localName, prefix, value, false);
}
}
return newContent;
}
nsIContent* nsHtml5TreeOperation::CreateMathMLElement(
nsAtom* aName, nsHtml5HtmlAttributes* aAttributes,
nsNodeInfoManager* aNodeInfoManager, nsHtml5DocumentBuilder* aBuilder) {
nsCOMPtr<dom::Element> newElement;
if (MOZ_LIKELY(aNodeInfoManager->MathMLEnabled())) {
RefPtr<dom::NodeInfo> nodeInfo = aNodeInfoManager->GetNodeInfo(
aName, nullptr, kNameSpaceID_MathML, nsINode::ELEMENT_NODE);
NS_ASSERTION(nodeInfo, "Got null nodeinfo.");
mozilla::DebugOnly<nsresult> rv =
NS_NewMathMLElement(getter_AddRefs(newElement), nodeInfo.forget());
MOZ_ASSERT(NS_SUCCEEDED(rv) && newElement);
} else {
RefPtr<dom::NodeInfo> nodeInfo = aNodeInfoManager->GetNodeInfo(
aName, nullptr, kNameSpaceID_disabled_MathML, nsINode::ELEMENT_NODE);
NS_ASSERTION(nodeInfo, "Got null nodeinfo.");
mozilla::DebugOnly<nsresult> rv =
NS_NewXMLElement(getter_AddRefs(newElement), nodeInfo.forget());
MOZ_ASSERT(NS_SUCCEEDED(rv) && newElement);
}
dom::Element* newContent = newElement;
aBuilder->HoldElement(newElement.forget());
if (!aAttributes) {
return newContent;
}
int32_t len = aAttributes->getLength();
for (int32_t i = 0; i < len; i++) {
nsHtml5String val = aAttributes->getValueNoBoundsCheck(i);
nsAtom* klass = val.MaybeAsAtom();
if (klass) {
newContent->SetSingleClassFromParser(klass);
} else {
nsAtom* localName = aAttributes->getLocalNameNoBoundsCheck(i);
nsAtom* prefix = aAttributes->getPrefixNoBoundsCheck(i);
int32_t nsuri = aAttributes->getURINoBoundsCheck(i);
nsString value; // Not Auto, because using it to hold nsStringBuffer*
val.ToString(value);
newContent->SetAttr(nsuri, localName, prefix, value, false);
}
}
return newContent;
}
void nsHtml5TreeOperation::SetFormElement(nsIContent* aNode,
nsIContent* aParent) {
nsCOMPtr<nsIFormControl> formControl(do_QueryInterface(aNode));
RefPtr<dom::HTMLImageElement> domImageElement =
dom::HTMLImageElement::FromNodeOrNull(aNode);
// NS_ASSERTION(formControl, "Form-associated element did not implement
// nsIFormControl.");
// TODO: uncomment the above line when img doesn't cause an issue (bug
// 1558793)
RefPtr<dom::HTMLFormElement> formElement =
dom::HTMLFormElement::FromNodeOrNull(aParent);
NS_ASSERTION(formElement,
"The form element doesn't implement HTMLFormElement.");
// Avoid crashing on <img>
if (formControl &&
!aNode->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::form)) {
formControl->SetForm(formElement);
} else if (domImageElement) {
domImageElement->SetForm(formElement);
}
}
nsresult nsHtml5TreeOperation::FosterParentText(
nsIContent* aStackParent, char16_t* aBuffer, uint32_t aLength,
nsIContent* aTable, nsHtml5DocumentBuilder* aBuilder) {
MOZ_ASSERT(aBuilder);
MOZ_ASSERT(aBuilder->IsInDocUpdate());
nsresult rv = NS_OK;
nsIContent* foster = aTable->GetParent();
if (IsElementOrTemplateContent(foster)) {
nsHtml5OtherDocUpdate update(foster->OwnerDoc(), aBuilder->GetDocument());
nsIContent* previousSibling = aTable->GetPreviousSibling();
if (previousSibling && previousSibling->IsText()) {
return AppendTextToTextNode(aBuffer, aLength,
previousSibling->GetAsText(), aBuilder);
}
nsNodeInfoManager* nodeInfoManager =
aStackParent->OwnerDoc()->NodeInfoManager();
RefPtr<nsTextNode> text = new (nodeInfoManager) nsTextNode(nodeInfoManager);
NS_ASSERTION(text, "Infallible malloc failed?");
rv = text->SetText(aBuffer, aLength, false);
NS_ENSURE_SUCCESS(rv, rv);
rv = foster->InsertChildBefore(text, aTable, false);
NS_ENSURE_SUCCESS(rv, rv);
MutationObservers::NotifyContentInserted(foster, text);
return rv;
}
return AppendText(aBuffer, aLength, aStackParent, aBuilder);
}
nsresult nsHtml5TreeOperation::AppendComment(nsIContent* aParent,
char16_t* aBuffer, int32_t aLength,
nsHtml5DocumentBuilder* aBuilder) {
nsNodeInfoManager* nodeInfoManager = aParent->OwnerDoc()->NodeInfoManager();
RefPtr<dom::Comment> comment =
new (nodeInfoManager) dom::Comment(nodeInfoManager);
NS_ASSERTION(comment, "Infallible malloc failed?");
nsresult rv = comment->SetText(aBuffer, aLength, false);
NS_ENSURE_SUCCESS(rv, rv);
return Append(comment, aParent, aBuilder);
}
nsresult nsHtml5TreeOperation::AppendCommentToDocument(
char16_t* aBuffer, int32_t aLength, nsHtml5DocumentBuilder* aBuilder) {
RefPtr<dom::Comment> comment = new (aBuilder->GetNodeInfoManager())
dom::Comment(aBuilder->GetNodeInfoManager());
NS_ASSERTION(comment, "Infallible malloc failed?");
nsresult rv = comment->SetText(aBuffer, aLength, false);
NS_ENSURE_SUCCESS(rv, rv);
return AppendToDocument(comment, aBuilder);
}
nsresult nsHtml5TreeOperation::AppendDoctypeToDocument(
nsAtom* aName, const nsAString& aPublicId, const nsAString& aSystemId,
nsHtml5DocumentBuilder* aBuilder) {
// Adapted from nsXMLContentSink
// Create a new doctype node
RefPtr<dom::DocumentType> docType =
NS_NewDOMDocumentType(aBuilder->GetNodeInfoManager(), aName, aPublicId,
aSystemId, VoidString());
return AppendToDocument(docType, aBuilder);
}
nsIContent* nsHtml5TreeOperation::GetDocumentFragmentForTemplate(
nsIContent* aNode) {
dom::HTMLTemplateElement* tempElem =
static_cast<dom::HTMLTemplateElement*>(aNode);
RefPtr<dom::DocumentFragment> frag = tempElem->Content();
return frag;
}
nsIContent* nsHtml5TreeOperation::GetFosterParent(nsIContent* aTable,
nsIContent* aStackParent) {
nsIContent* tableParent = aTable->GetParent();
return IsElementOrTemplateContent(tableParent) ? tableParent : aStackParent;
}
void nsHtml5TreeOperation::PreventScriptExecution(nsIContent* aNode) {
nsCOMPtr<nsIScriptElement> sele = do_QueryInterface(aNode);
if (sele) {
sele->PreventExecution();
} else {
MOZ_ASSERT(nsNameSpaceManager::GetInstance()->mSVGDisabled,
"Node didn't QI to script, but SVG wasn't disabled.");
}
}
void nsHtml5TreeOperation::DoneAddingChildren(nsIContent* aNode) {
aNode->DoneAddingChildren(aNode->HasParserNotified());
}
void nsHtml5TreeOperation::DoneCreatingElement(nsIContent* aNode) {
aNode->DoneCreatingElement();
}
void nsHtml5TreeOperation::SvgLoad(nsIContent* aNode) {
nsCOMPtr<nsIRunnable> event = new nsHtml5SVGLoadDispatcher(aNode);
if (NS_FAILED(
aNode->OwnerDoc()->Dispatch(TaskCategory::Network, event.forget()))) {
NS_WARNING("failed to dispatch svg load dispatcher");
}
}
void nsHtml5TreeOperation::MarkMalformedIfScript(nsIContent* aNode) {
nsCOMPtr<nsIScriptElement> sele = do_QueryInterface(aNode);
if (sele) {
// Make sure to serialize this script correctly, for nice round tripping.
sele->SetIsMalformed();
}
}
nsresult nsHtml5TreeOperation::Perform(nsHtml5TreeOpExecutor* aBuilder,
nsIContent** aScriptElement,
bool* aInterrupted, bool* aStreamEnded) {
struct TreeOperationMatcher {
TreeOperationMatcher(nsHtml5TreeOpExecutor* aBuilder,
nsIContent** aScriptElement, bool* aInterrupted,
bool* aStreamEnded)
: mBuilder(aBuilder),
mScriptElement(aScriptElement),
mInterrupted(aInterrupted),
mStreamEnded(aStreamEnded) {}
nsHtml5TreeOpExecutor* mBuilder;
nsIContent** mScriptElement;
bool* mInterrupted;
bool* mStreamEnded;
nsresult operator()(const opAppend& aOperation) {
return Append(*(aOperation.mChild), *(aOperation.mParent),
aOperation.mFromNetwork, mBuilder);
}
nsresult operator()(const opDetach& aOperation) {
Detach(*(aOperation.mElement), mBuilder);
return NS_OK;
}
nsresult operator()(const opAppendChildrenToNewParent& aOperation) {
nsCOMPtr<nsIContent> node = *(aOperation.mOldParent);
nsIContent* parent = *(aOperation.mNewParent);
return AppendChildrenToNewParent(node, parent, mBuilder);
}
nsresult operator()(const opFosterParent& aOperation) {
nsIContent* node = *(aOperation.mChild);
nsIContent* parent = *(aOperation.mStackParent);
nsIContent* table = *(aOperation.mTable);
return FosterParent(node, parent, table, mBuilder);
}
nsresult operator()(const opAppendToDocument& aOperation) {
nsresult rv = AppendToDocument(*(aOperation.mContent), mBuilder);
mBuilder->PauseDocUpdate(mInterrupted);
return rv;
}
nsresult operator()(const opAddAttributes& aOperation) {
nsIContent* node = *(aOperation.mElement);
nsHtml5HtmlAttributes* attributes = aOperation.mAttributes;
return AddAttributes(node, attributes, mBuilder);
}
nsresult operator()(const nsHtml5DocumentMode& aMode) {
mBuilder->SetDocumentMode(aMode);
return NS_OK;
}
nsresult operator()(const opCreateHTMLElement& aOperation) {
nsIContent** target = aOperation.mContent;
mozilla::dom::HTMLContentCreatorFunction creator = aOperation.mCreator;
nsAtom* name = aOperation.mName;
nsHtml5HtmlAttributes* attributes = aOperation.mAttributes;
nsIContent* intendedParent =
aOperation.mIntendedParent ? *(aOperation.mIntendedParent) : nullptr;
// intendedParent == nullptr is a special case where the
// intended parent is the document.
nsNodeInfoManager* nodeInfoManager =
intendedParent ? intendedParent->OwnerDoc()->NodeInfoManager()
: mBuilder->GetNodeInfoManager();
*target = CreateHTMLElement(name, attributes, aOperation.mFromNetwork,
nodeInfoManager, mBuilder, creator);
return NS_OK;
}
nsresult operator()(const opCreateSVGElement& aOperation) {
nsIContent** target = aOperation.mContent;
mozilla::dom::SVGContentCreatorFunction creator = aOperation.mCreator;
nsAtom* name = aOperation.mName;
nsHtml5HtmlAttributes* attributes = aOperation.mAttributes;
nsIContent* intendedParent =
aOperation.mIntendedParent ? *(aOperation.mIntendedParent) : nullptr;
// intendedParent == nullptr is a special case where the
// intended parent is the document.
nsNodeInfoManager* nodeInfoManager =
intendedParent ? intendedParent->OwnerDoc()->NodeInfoManager()
: mBuilder->GetNodeInfoManager();
*target = CreateSVGElement(name, attributes, aOperation.mFromNetwork,
nodeInfoManager, mBuilder, creator);
return NS_OK;
}
nsresult operator()(const opCreateMathMLElement& aOperation) {
nsIContent** target = aOperation.mContent;
nsAtom* name = aOperation.mName;
nsHtml5HtmlAttributes* attributes = aOperation.mAttributes;
nsIContent* intendedParent =
aOperation.mIntendedParent ? *(aOperation.mIntendedParent) : nullptr;
// intendedParent == nullptr is a special case where the
// intended parent is the document.
nsNodeInfoManager* nodeInfoManager =
intendedParent ? intendedParent->OwnerDoc()->NodeInfoManager()
: mBuilder->GetNodeInfoManager();
*target =
CreateMathMLElement(name, attributes, nodeInfoManager, mBuilder);
return NS_OK;
}
nsresult operator()(const opSetFormElement& aOperation) {
SetFormElement(*(aOperation.mContent), *(aOperation.mFormElement));
return NS_OK;
}
nsresult operator()(const opAppendText& aOperation) {
nsIContent* parent = *aOperation.mParent;
char16_t* buffer = aOperation.mBuffer;
uint32_t length = aOperation.mLength;
return AppendText(buffer, length, parent, mBuilder);
}
nsresult operator()(const opFosterParentText& aOperation) {
nsIContent* stackParent = *aOperation.mStackParent;
char16_t* buffer = aOperation.mBuffer;
uint32_t length = aOperation.mLength;
nsIContent* table = *aOperation.mTable;
return FosterParentText(stackParent, buffer, length, table, mBuilder);
}
nsresult operator()(const opAppendComment& aOperation) {
nsIContent* parent = *aOperation.mParent;
char16_t* buffer = aOperation.mBuffer;
uint32_t length = aOperation.mLength;
return AppendComment(parent, buffer, length, mBuilder);
}
nsresult operator()(const opAppendCommentToDocument& aOperation) {
char16_t* buffer = aOperation.mBuffer;
int32_t length = aOperation.mLength;
return AppendCommentToDocument(buffer, length, mBuilder);
}
nsresult operator()(const opAppendDoctypeToDocument& aOperation) {
nsAtom* name = aOperation.mName;
nsHtml5TreeOperationStringPair* pair = aOperation.mStringPair;
nsString publicId;
nsString systemId;
pair->Get(publicId, systemId);
return AppendDoctypeToDocument(name, publicId, systemId, mBuilder);
}
nsresult operator()(const opGetDocumentFragmentForTemplate& aOperation) {
nsIContent* node = *(aOperation.mTemplate);
*(aOperation.mFragHandle) = GetDocumentFragmentForTemplate(node);
return NS_OK;
}
nsresult operator()(const opGetFosterParent& aOperation) {
nsIContent* table = *(aOperation.mTable);
nsIContent* stackParent = *(aOperation.mStackParent);
nsIContent* fosterParent = GetFosterParent(table, stackParent);
*aOperation.mParentHandle = fosterParent;
return NS_OK;
}
nsresult operator()(const opMarkAsBroken& aOperation) {
return aOperation.mResult;
}
nsresult operator()(const opRunScript& aOperation) {
nsIContent* node = *(aOperation.mElement);
nsAHtml5TreeBuilderState* snapshot = aOperation.mBuilderState;
if (snapshot) {
mBuilder->InitializeDocWriteParserState(snapshot,
aOperation.mLineNumber);
}
*mScriptElement = node;
return NS_OK;
}
nsresult operator()(const opRunScriptAsyncDefer& aOperation) {
mBuilder->RunScript(*(aOperation.mElement));
return NS_OK;
}
nsresult operator()(const opPreventScriptExecution& aOperation) {
PreventScriptExecution(*(aOperation.mElement));
return NS_OK;
}
nsresult operator()(const opDoneAddingChildren& aOperation) {
nsIContent* node = *(aOperation.mElement);
node->DoneAddingChildren(node->HasParserNotified());
return NS_OK;
}
nsresult operator()(const opDoneCreatingElement& aOperation) {
DoneCreatingElement(*(aOperation.mElement));
return NS_OK;
}
nsresult operator()(const opSetDocumentCharset& aOperation) {
auto encoding = WrapNotNull(aOperation.mEncoding);
mBuilder->SetDocumentCharsetAndSource(encoding,
aOperation.mCharsetSource);
return NS_OK;
}
nsresult operator()(const opCharsetSwitchTo& aOperation) {
auto encoding = WrapNotNull(aOperation.mEncoding);
mBuilder->NeedsCharsetSwitchTo(encoding, aOperation.mCharsetSource,
(uint32_t)aOperation.mLineNumber);
return NS_OK;
}
nsresult operator()(const opUpdateStyleSheet& aOperation) {
mBuilder->UpdateStyleSheet(*(aOperation.mElement));
return NS_OK;
}
nsresult operator()(const opProcessOfflineManifest& aOperation) {
// TODO: remove this
return NS_OK;
}
nsresult operator()(const opMarkMalformedIfScript& aOperation) {
MarkMalformedIfScript(*(aOperation.mElement));
return NS_OK;
}
nsresult operator()(const opStreamEnded& aOperation) {
*mStreamEnded = true;
return NS_OK;
}
nsresult operator()(const opSetStyleLineNumber& aOperation) {
nsIContent* node = *(aOperation.mContent);
if (auto* linkStyle = dom::LinkStyle::FromNode(*node)) {
linkStyle->SetLineNumber(aOperation.mLineNumber);
} else {
MOZ_ASSERT(nsNameSpaceManager::GetInstance()->mSVGDisabled,
"Node didn't QI to style, but SVG wasn't disabled.");
}
return NS_OK;
}
nsresult operator()(const opSetScriptLineNumberAndFreeze& aOperation) {
nsIContent* node = *(aOperation.mContent);
nsCOMPtr<nsIScriptElement> sele = do_QueryInterface(node);
if (sele) {
sele->SetScriptLineNumber(aOperation.mLineNumber);
sele->FreezeExecutionAttrs(node->OwnerDoc());
} else {
MOZ_ASSERT(nsNameSpaceManager::GetInstance()->mSVGDisabled,
"Node didn't QI to script, but SVG wasn't disabled.");
}
return NS_OK;
}
nsresult operator()(const opSvgLoad& aOperation) {
SvgLoad(*(aOperation.mElement));
return NS_OK;
}
nsresult operator()(const opMaybeComplainAboutCharset& aOperation) {
char* msgId = aOperation.mMsgId;
bool error = aOperation.mError;
int32_t lineNumber = aOperation.mLineNumber;
mBuilder->MaybeComplainAboutCharset(msgId, error, (uint32_t)lineNumber);
return NS_OK;
}
nsresult operator()(const opMaybeComplainAboutDeepTree& aOperation) {
mBuilder->MaybeComplainAboutDeepTree((uint32_t)aOperation.mLineNumber);
return NS_OK;
}
nsresult operator()(const opAddClass& aOperation) {
Element* element = (*(aOperation.mElement))->AsElement();
char16_t* str = aOperation.mClass;
nsDependentString depStr(str);
// See viewsource.css for the possible classes
nsAutoString klass;
element->GetAttr(kNameSpaceID_None, nsGkAtoms::_class, klass);
if (!klass.IsEmpty()) {
klass.Append(' ');
klass.Append(depStr);
element->SetAttr(kNameSpaceID_None, nsGkAtoms::_class, klass, true);
} else {
element->SetAttr(kNameSpaceID_None, nsGkAtoms::_class, depStr, true);
}
return NS_OK;
}
nsresult operator()(const opAddViewSourceHref& aOperation) {
Element* element = (*aOperation.mElement)->AsElement();
char16_t* buffer = aOperation.mBuffer;
int32_t length = aOperation.mLength;
nsDependentString relative(buffer, length);
Document* doc = mBuilder->GetDocument();
auto encoding = doc->GetDocumentCharacterSet();
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), relative, encoding,
mBuilder->GetViewSourceBaseURI());
NS_ENSURE_SUCCESS(rv, NS_OK);
// Reuse the fix for bug 467852
// URLs that execute script (e.g. "javascript:" URLs) should just be
// ignored. There's nothing reasonable we can do with them, and allowing
// them to execute in the context of the view-source window presents a
// security risk. Just return the empty string in this case.
bool openingExecutesScript = false;
rv = NS_URIChainHasFlags(uri,
nsIProtocolHandler::URI_OPENING_EXECUTES_SCRIPT,
&openingExecutesScript);
if (NS_FAILED(rv) || openingExecutesScript) {
return NS_OK;
}
nsAutoCString viewSourceUrl;
// URLs that return data (e.g. "http:" URLs) should be prefixed with
// "view-source:". URLs that don't return data should just be returned
// undecorated.
bool doesNotReturnData = false;
rv =
NS_URIChainHasFlags(uri, nsIProtocolHandler::URI_DOES_NOT_RETURN_DATA,
&doesNotReturnData);
NS_ENSURE_SUCCESS(rv, NS_OK);
if (!doesNotReturnData) {
viewSourceUrl.AssignLiteral("view-source:");
}
nsAutoCString spec;
rv = uri->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
viewSourceUrl.Append(spec);
nsAutoString utf16;
CopyUTF8toUTF16(viewSourceUrl, utf16);
element->SetAttr(kNameSpaceID_None, nsGkAtoms::href, utf16, true);
return NS_OK;
}
nsresult operator()(const opAddViewSourceBase& aOperation) {
nsDependentString baseUrl(aOperation.mBuffer, aOperation.mLength);
mBuilder->AddBase(baseUrl);
return NS_OK;
}
nsresult operator()(const opAddErrorType& aOperation) {
Element* element = (*(aOperation.mElement))->AsElement();
char* msgId = aOperation.mMsgId;
nsAtom* atom = aOperation.mName;
nsAtom* otherAtom = aOperation.mOther;
// See viewsource.css for the possible classes in addition to "error".
nsAutoString klass;
element->GetAttr(kNameSpaceID_None, nsGkAtoms::_class, klass);
if (!klass.IsEmpty()) {
klass.AppendLiteral(" error");
element->SetAttr(kNameSpaceID_None, nsGkAtoms::_class, klass, true);
} else {
element->SetAttr(kNameSpaceID_None, nsGkAtoms::_class, u"error"_ns,
true);
}
nsresult rv;
nsAutoString message;
if (otherAtom) {
rv = nsContentUtils::FormatLocalizedString(
message, nsContentUtils::eHTMLPARSER_PROPERTIES, msgId,
nsDependentAtomString(atom), nsDependentAtomString(otherAtom));
NS_ENSURE_SUCCESS(rv, NS_OK);
} else if (atom) {
rv = nsContentUtils::FormatLocalizedString(
message, nsContentUtils::eHTMLPARSER_PROPERTIES, msgId,
nsDependentAtomString(atom));
NS_ENSURE_SUCCESS(rv, NS_OK);
} else {
rv = nsContentUtils::GetLocalizedString(
nsContentUtils::eHTMLPARSER_PROPERTIES, msgId, message);
NS_ENSURE_SUCCESS(rv, NS_OK);
}
nsAutoString title;
element->GetAttr(kNameSpaceID_None, nsGkAtoms::title, title);
if (!title.IsEmpty()) {
title.Append('\n');
title.Append(message);
element->SetAttr(kNameSpaceID_None, nsGkAtoms::title, title, true);
} else {
element->SetAttr(kNameSpaceID_None, nsGkAtoms::title, message, true);
}
return rv;
}
nsresult operator()(const opAddLineNumberId& aOperation) {
Element* element = (*(aOperation.mElement))->AsElement();
int32_t lineNumber = aOperation.mLineNumber;
nsAutoString val(u"line"_ns);
val.AppendInt(lineNumber);
element->SetAttr(kNameSpaceID_None, nsGkAtoms::id, val, true);
return NS_OK;
}
nsresult operator()(const opStartLayout& aOperation) {
mBuilder->StartLayout(
mInterrupted); // this causes a notification flush anyway
return NS_OK;
}
nsresult operator()(const opEnableEncodingMenu& aOperation) {
Document* doc = mBuilder->GetDocument();
doc->EnableEncodingMenu();
return NS_OK;
}
nsresult operator()(const uninitialized& aOperation) {
MOZ_CRASH("uninitialized");
return NS_OK;
}
};
return mOperation.match(TreeOperationMatcher(aBuilder, aScriptElement,
aInterrupted, aStreamEnded));
}