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gecko-dev/dom/xul/nsXULContentSink.cpp

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31 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=8 sts=4 et sw=4 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/. */
/*
* An implementation for a Gecko-style content sink that knows how
* to build a content model (the "prototype" document) from XUL.
*
* For more information on XUL,
* see http://developer.mozilla.org/en/docs/XUL
*/
#include "nsXULContentSink.h"
#include "jsfriendapi.h"
#include "nsCOMPtr.h"
#include "nsForwardReference.h"
#include "nsHTMLStyleSheet.h"
#include "nsIContentSink.h"
#include "nsIDocument.h"
#include "nsIDOMEventListener.h"
#include "nsIDOMHTMLFormElement.h"
#include "nsIDOMXULDocument.h"
#include "nsIFormControl.h"
#include "mozilla/dom/NodeInfo.h"
#include "nsIScriptContext.h"
#include "nsIScriptGlobalObject.h"
#include "nsIServiceManager.h"
#include "nsIURL.h"
#include "nsNameSpaceManager.h"
#include "nsParserBase.h"
#include "nsViewManager.h"
#include "nsIXULDocument.h"
#include "nsIScriptSecurityManager.h"
#include "nsLayoutCID.h"
#include "nsNetUtil.h"
#include "nsRDFCID.h"
#include "nsXPIDLString.h"
#include "nsReadableUtils.h"
#include "nsXULElement.h"
#include "prlog.h"
#include "prmem.h"
#include "nsCRT.h"
#include "nsXULPrototypeDocument.h" // XXXbe temporary
#include "mozilla/css/Loader.h"
#include "nsUnicharUtils.h"
#include "nsGkAtoms.h"
#include "nsContentUtils.h"
#include "nsAttrName.h"
#include "nsXMLContentSink.h"
#include "nsIConsoleService.h"
#include "nsIScriptError.h"
#include "nsContentTypeParser.h"
#ifdef PR_LOGGING
static PRLogModuleInfo* gContentSinkLog;
#endif
//----------------------------------------------------------------------
XULContentSinkImpl::ContextStack::ContextStack()
: mTop(nullptr), mDepth(0)
{
}
XULContentSinkImpl::ContextStack::~ContextStack()
{
while (mTop) {
Entry* doomed = mTop;
mTop = mTop->mNext;
delete doomed;
}
}
nsresult
XULContentSinkImpl::ContextStack::Push(nsXULPrototypeNode* aNode, State aState)
{
Entry* entry = new Entry;
if (! entry)
return NS_ERROR_OUT_OF_MEMORY;
entry->mNode = aNode;
entry->mState = aState;
entry->mNext = mTop;
mTop = entry;
++mDepth;
return NS_OK;
}
nsresult
XULContentSinkImpl::ContextStack::Pop(State* aState)
{
if (mDepth == 0)
return NS_ERROR_UNEXPECTED;
Entry* entry = mTop;
mTop = mTop->mNext;
--mDepth;
*aState = entry->mState;
delete entry;
return NS_OK;
}
nsresult
XULContentSinkImpl::ContextStack::GetTopNode(nsRefPtr<nsXULPrototypeNode>& aNode)
{
if (mDepth == 0)
return NS_ERROR_UNEXPECTED;
aNode = mTop->mNode;
return NS_OK;
}
nsresult
XULContentSinkImpl::ContextStack::GetTopChildren(nsPrototypeArray** aChildren)
{
if (mDepth == 0)
return NS_ERROR_UNEXPECTED;
*aChildren = &(mTop->mChildren);
return NS_OK;
}
void
XULContentSinkImpl::ContextStack::Clear()
{
Entry *cur = mTop;
while (cur) {
// Release the root element (and its descendants).
Entry *next = cur->mNext;
delete cur;
cur = next;
}
mTop = nullptr;
mDepth = 0;
}
void
XULContentSinkImpl::ContextStack::Traverse(nsCycleCollectionTraversalCallback& aCb)
{
nsCycleCollectionTraversalCallback& cb = aCb;
for (ContextStack::Entry* tmp = mTop; tmp; tmp = tmp->mNext) {
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNode)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mChildren)
}
}
//----------------------------------------------------------------------
XULContentSinkImpl::XULContentSinkImpl()
: mText(nullptr),
mTextLength(0),
mTextSize(0),
mConstrainSize(true),
mState(eInProlog),
mParser(nullptr)
{
#ifdef PR_LOGGING
if (! gContentSinkLog)
gContentSinkLog = PR_NewLogModule("nsXULContentSink");
#endif
}
XULContentSinkImpl::~XULContentSinkImpl()
{
NS_IF_RELEASE(mParser); // XXX should've been released by now, unless error.
// The context stack _should_ be empty, unless something has gone wrong.
NS_ASSERTION(mContextStack.Depth() == 0, "Context stack not empty?");
mContextStack.Clear();
moz_free(mText);
}
//----------------------------------------------------------------------
// nsISupports interface
NS_IMPL_CYCLE_COLLECTION_CLASS(XULContentSinkImpl)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(XULContentSinkImpl)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mNodeInfoManager)
tmp->mContextStack.Clear();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPrototype)
NS_IF_RELEASE(tmp->mParser);
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(XULContentSinkImpl)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNodeInfoManager)
tmp->mContextStack.Traverse(cb);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPrototype)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_RAWPTR(mParser)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(XULContentSinkImpl)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXMLContentSink)
NS_INTERFACE_MAP_ENTRY(nsIXMLContentSink)
NS_INTERFACE_MAP_ENTRY(nsIExpatSink)
NS_INTERFACE_MAP_ENTRY(nsIContentSink)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(XULContentSinkImpl)
NS_IMPL_CYCLE_COLLECTING_RELEASE(XULContentSinkImpl)
//----------------------------------------------------------------------
// nsIContentSink interface
NS_IMETHODIMP
XULContentSinkImpl::WillBuildModel(nsDTDMode aDTDMode)
{
#if FIXME
if (! mParentContentSink) {
// If we're _not_ an overlay, then notify the document that
// the load is beginning.
mDocument->BeginLoad();
}
#endif
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::DidBuildModel(bool aTerminated)
{
nsCOMPtr<nsIDocument> doc = do_QueryReferent(mDocument);
if (doc) {
doc->EndLoad();
mDocument = nullptr;
}
// Drop our reference to the parser to get rid of a circular
// reference.
NS_IF_RELEASE(mParser);
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::WillInterrupt(void)
{
// XXX Notify the docshell, if necessary
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::WillResume(void)
{
// XXX Notify the docshell, if necessary
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::SetParser(nsParserBase* aParser)
{
NS_IF_RELEASE(mParser);
mParser = aParser;
NS_IF_ADDREF(mParser);
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::SetDocumentCharset(nsACString& aCharset)
{
nsCOMPtr<nsIDocument> doc = do_QueryReferent(mDocument);
if (doc) {
doc->SetDocumentCharacterSet(aCharset);
}
return NS_OK;
}
nsISupports *
XULContentSinkImpl::GetTarget()
{
nsCOMPtr<nsIDocument> doc = do_QueryReferent(mDocument);
return doc;
}
//----------------------------------------------------------------------
nsresult
XULContentSinkImpl::Init(nsIDocument* aDocument,
nsXULPrototypeDocument* aPrototype)
{
NS_PRECONDITION(aDocument != nullptr, "null ptr");
if (! aDocument)
return NS_ERROR_NULL_POINTER;
nsresult rv;
mDocument = do_GetWeakReference(aDocument);
mPrototype = aPrototype;
mDocumentURL = mPrototype->GetURI();
// XXX this presumes HTTP header info is already set in document
// XXX if it isn't we need to set it here...
// XXXbz not like GetHeaderData on the proto doc _does_ anything....
nsAutoString preferredStyle;
rv = mPrototype->GetHeaderData(nsGkAtoms::headerDefaultStyle,
preferredStyle);
if (NS_FAILED(rv)) return rv;
if (!preferredStyle.IsEmpty()) {
aDocument->SetHeaderData(nsGkAtoms::headerDefaultStyle,
preferredStyle);
}
// Set the right preferred style on the document's CSSLoader.
aDocument->CSSLoader()->SetPreferredSheet(preferredStyle);
mNodeInfoManager = aPrototype->GetNodeInfoManager();
if (! mNodeInfoManager)
return NS_ERROR_UNEXPECTED;
mState = eInProlog;
return NS_OK;
}
//----------------------------------------------------------------------
//
// Text buffering
//
bool
XULContentSinkImpl::IsDataInBuffer(char16_t* buffer, int32_t length)
{
for (int32_t i = 0; i < length; ++i) {
if (buffer[i] == ' ' ||
buffer[i] == '\t' ||
buffer[i] == '\n' ||
buffer[i] == '\r')
continue;
return true;
}
return false;
}
nsresult
XULContentSinkImpl::FlushText(bool aCreateTextNode)
{
nsresult rv;
do {
// Don't do anything if there's no text to create a node from, or
// if they've told us not to create a text node
if (! mTextLength)
break;
if (! aCreateTextNode)
break;
nsRefPtr<nsXULPrototypeNode> node;
rv = mContextStack.GetTopNode(node);
if (NS_FAILED(rv)) return rv;
bool stripWhitespace = false;
if (node->mType == nsXULPrototypeNode::eType_Element) {
mozilla::dom::NodeInfo *nodeInfo =
static_cast<nsXULPrototypeElement*>(node.get())->mNodeInfo;
if (nodeInfo->NamespaceEquals(kNameSpaceID_XUL))
stripWhitespace = !nodeInfo->Equals(nsGkAtoms::label) &&
!nodeInfo->Equals(nsGkAtoms::description);
}
// Don't bother if there's nothing but whitespace.
if (stripWhitespace && ! IsDataInBuffer(mText, mTextLength))
break;
// Don't bother if we're not in XUL document body
if (mState != eInDocumentElement || mContextStack.Depth() == 0)
break;
nsXULPrototypeText* text = new nsXULPrototypeText();
if (! text)
return NS_ERROR_OUT_OF_MEMORY;
text->mValue.Assign(mText, mTextLength);
if (stripWhitespace)
text->mValue.Trim(" \t\n\r");
// hook it up
nsPrototypeArray* children = nullptr;
rv = mContextStack.GetTopChildren(&children);
if (NS_FAILED(rv)) return rv;
// transfer ownership of 'text' to the children array
children->AppendElement(text);
} while (0);
// Reset our text buffer
mTextLength = 0;
return NS_OK;
}
//----------------------------------------------------------------------
nsresult
XULContentSinkImpl::NormalizeAttributeString(const char16_t *aExpatName,
nsAttrName &aName)
{
int32_t nameSpaceID;
nsCOMPtr<nsIAtom> prefix, localName;
nsContentUtils::SplitExpatName(aExpatName, getter_AddRefs(prefix),
getter_AddRefs(localName), &nameSpaceID);
if (nameSpaceID == kNameSpaceID_None) {
aName.SetTo(localName);
return NS_OK;
}
nsRefPtr<mozilla::dom::NodeInfo> ni;
ni = mNodeInfoManager->GetNodeInfo(localName, prefix,
nameSpaceID,
nsIDOMNode::ATTRIBUTE_NODE);
aName.SetTo(ni);
return NS_OK;
}
nsresult
XULContentSinkImpl::CreateElement(mozilla::dom::NodeInfo *aNodeInfo,
nsXULPrototypeElement** aResult)
{
nsXULPrototypeElement* element = new nsXULPrototypeElement();
if (! element)
return NS_ERROR_OUT_OF_MEMORY;
element->mNodeInfo = aNodeInfo;
*aResult = element;
return NS_OK;
}
/**** BEGIN NEW APIs ****/
NS_IMETHODIMP
XULContentSinkImpl::HandleStartElement(const char16_t *aName,
const char16_t **aAtts,
uint32_t aAttsCount,
uint32_t aLineNumber)
{
// XXX Hopefully the parser will flag this before we get here. If
// we're in the epilog, there should be no new elements
NS_PRECONDITION(mState != eInEpilog, "tag in XUL doc epilog");
NS_PRECONDITION(aAttsCount % 2 == 0, "incorrect aAttsCount");
// Adjust aAttsCount so it's the actual number of attributes
aAttsCount /= 2;
if (mState == eInEpilog)
return NS_ERROR_UNEXPECTED;
if (mState != eInScript) {
FlushText();
}
int32_t nameSpaceID;
nsCOMPtr<nsIAtom> prefix, localName;
nsContentUtils::SplitExpatName(aName, getter_AddRefs(prefix),
getter_AddRefs(localName), &nameSpaceID);
nsRefPtr<mozilla::dom::NodeInfo> nodeInfo;
nodeInfo = mNodeInfoManager->GetNodeInfo(localName, prefix, nameSpaceID,
nsIDOMNode::ELEMENT_NODE);
nsresult rv = NS_OK;
switch (mState) {
case eInProlog:
// We're the root document element
rv = OpenRoot(aAtts, aAttsCount, nodeInfo);
break;
case eInDocumentElement:
rv = OpenTag(aAtts, aAttsCount, aLineNumber, nodeInfo);
break;
case eInEpilog:
case eInScript:
PR_LOG(gContentSinkLog, PR_LOG_WARNING,
("xul: warning: unexpected tags in epilog at line %d",
aLineNumber));
rv = NS_ERROR_UNEXPECTED; // XXX
break;
}
return rv;
}
NS_IMETHODIMP
XULContentSinkImpl::HandleEndElement(const char16_t *aName)
{
// Never EVER return anything but NS_OK or
// NS_ERROR_HTMLPARSER_BLOCK from this method. Doing so will blow
// the parser's little mind all over the planet.
nsresult rv;
nsRefPtr<nsXULPrototypeNode> node;
rv = mContextStack.GetTopNode(node);
if (NS_FAILED(rv)) {
return NS_OK;
}
switch (node->mType) {
case nsXULPrototypeNode::eType_Element: {
// Flush any text _now_, so that we'll get text nodes created
// before popping the stack.
FlushText();
// Pop the context stack and do prototype hookup.
nsPrototypeArray* children = nullptr;
rv = mContextStack.GetTopChildren(&children);
if (NS_FAILED(rv)) return rv;
nsXULPrototypeElement* element =
static_cast<nsXULPrototypeElement*>(node.get());
int32_t count = children->Length();
if (count) {
element->mChildren.SetCapacity(count);
for (int32_t i = 0; i < count; ++i)
element->mChildren.AppendElement(children->ElementAt(i));
}
}
break;
case nsXULPrototypeNode::eType_Script: {
nsXULPrototypeScript* script =
static_cast<nsXULPrototypeScript*>(node.get());
// If given a src= attribute, we must ignore script tag content.
if (!script->mSrcURI && !script->GetScriptObject()) {
nsCOMPtr<nsIDocument> doc = do_QueryReferent(mDocument);
script->mOutOfLine = false;
if (doc)
script->Compile(mText, mTextLength, mDocumentURL,
script->mLineNo, doc);
}
FlushText(false);
}
break;
default:
NS_ERROR("didn't expect that");
break;
}
rv = mContextStack.Pop(&mState);
NS_ASSERTION(NS_SUCCEEDED(rv), "context stack corrupted");
if (NS_FAILED(rv)) return rv;
if (mContextStack.Depth() == 0) {
// The root element should -always- be an element, because
// it'll have been created via XULContentSinkImpl::OpenRoot().
NS_ASSERTION(node->mType == nsXULPrototypeNode::eType_Element, "root is not an element");
if (node->mType != nsXULPrototypeNode::eType_Element)
return NS_ERROR_UNEXPECTED;
// Now that we're done parsing, set the prototype document's
// root element. This transfers ownership of the prototype
// element tree to the prototype document.
nsXULPrototypeElement* element =
static_cast<nsXULPrototypeElement*>(node.get());
mPrototype->SetRootElement(element);
mState = eInEpilog;
}
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::HandleComment(const char16_t *aName)
{
FlushText();
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::HandleCDataSection(const char16_t *aData, uint32_t aLength)
{
FlushText();
return AddText(aData, aLength);
}
NS_IMETHODIMP
XULContentSinkImpl::HandleDoctypeDecl(const nsAString & aSubset,
const nsAString & aName,
const nsAString & aSystemId,
const nsAString & aPublicId,
nsISupports* aCatalogData)
{
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::HandleCharacterData(const char16_t *aData,
uint32_t aLength)
{
if (aData && mState != eInProlog && mState != eInEpilog) {
return AddText(aData, aLength);
}
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::HandleProcessingInstruction(const char16_t *aTarget,
const char16_t *aData)
{
FlushText();
const nsDependentString target(aTarget);
const nsDependentString data(aData);
// Note: the created nsXULPrototypePI has mRefCnt == 1
nsRefPtr<nsXULPrototypePI> pi = new nsXULPrototypePI();
if (!pi)
return NS_ERROR_OUT_OF_MEMORY;
pi->mTarget = target;
pi->mData = data;
if (mState == eInProlog) {
// Note: passing in already addrefed pi
return mPrototype->AddProcessingInstruction(pi);
}
nsresult rv;
nsPrototypeArray* children = nullptr;
rv = mContextStack.GetTopChildren(&children);
if (NS_FAILED(rv)) {
return rv;
}
if (!children->AppendElement(pi)) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::HandleXMLDeclaration(const char16_t *aVersion,
const char16_t *aEncoding,
int32_t aStandalone)
{
return NS_OK;
}
NS_IMETHODIMP
XULContentSinkImpl::ReportError(const char16_t* aErrorText,
const char16_t* aSourceText,
nsIScriptError *aError,
bool *_retval)
{
NS_PRECONDITION(aError && aSourceText && aErrorText, "Check arguments!!!");
// The expat driver should report the error.
*_retval = true;
nsresult rv = NS_OK;
// make sure to empty the context stack so that
// <parsererror> could become the root element.
mContextStack.Clear();
mState = eInProlog;
// Clear any buffered-up text we have. It's enough to set the length to 0.
// The buffer itself is allocated when we're created and deleted in our
// destructor, so don't mess with it.
mTextLength = 0;
nsCOMPtr<nsIXULDocument> doc = do_QueryReferent(mDocument);
if (doc && !doc->OnDocumentParserError()) {
// The overlay was broken. Don't add a messy element to the master doc.
return NS_OK;
}
const char16_t* noAtts[] = { 0, 0 };
NS_NAMED_LITERAL_STRING(errorNs,
"http://www.mozilla.org/newlayout/xml/parsererror.xml");
nsAutoString parsererror(errorNs);
parsererror.Append((char16_t)0xFFFF);
parsererror.AppendLiteral("parsererror");
rv = HandleStartElement(parsererror.get(), noAtts, 0, 0);
NS_ENSURE_SUCCESS(rv,rv);
rv = HandleCharacterData(aErrorText, NS_strlen(aErrorText));
NS_ENSURE_SUCCESS(rv,rv);
nsAutoString sourcetext(errorNs);
sourcetext.Append((char16_t)0xFFFF);
sourcetext.AppendLiteral("sourcetext");
rv = HandleStartElement(sourcetext.get(), noAtts, 0, 0);
NS_ENSURE_SUCCESS(rv,rv);
rv = HandleCharacterData(aSourceText, NS_strlen(aSourceText));
NS_ENSURE_SUCCESS(rv,rv);
rv = HandleEndElement(sourcetext.get());
NS_ENSURE_SUCCESS(rv,rv);
rv = HandleEndElement(parsererror.get());
NS_ENSURE_SUCCESS(rv,rv);
return rv;
}
nsresult
XULContentSinkImpl::OpenRoot(const char16_t** aAttributes,
const uint32_t aAttrLen,
mozilla::dom::NodeInfo *aNodeInfo)
{
NS_ASSERTION(mState == eInProlog, "how'd we get here?");
if (mState != eInProlog)
return NS_ERROR_UNEXPECTED;
nsresult rv;
if (aNodeInfo->Equals(nsGkAtoms::script, kNameSpaceID_XHTML) ||
aNodeInfo->Equals(nsGkAtoms::script, kNameSpaceID_XUL)) {
PR_LOG(gContentSinkLog, PR_LOG_ERROR,
("xul: script tag not allowed as root content element"));
return NS_ERROR_UNEXPECTED;
}
// Create the element
nsXULPrototypeElement* element;
rv = CreateElement(aNodeInfo, &element);
if (NS_FAILED(rv)) {
#ifdef PR_LOGGING
if (PR_LOG_TEST(gContentSinkLog, PR_LOG_ERROR)) {
nsAutoString anodeC;
aNodeInfo->GetName(anodeC);
PR_LOG(gContentSinkLog, PR_LOG_ERROR,
("xul: unable to create element '%s' at line %d",
NS_ConvertUTF16toUTF8(anodeC).get(),
-1)); // XXX pass in line number
}
#endif
return rv;
}
// Push the element onto the context stack, so that child
// containers will hook up to us as their parent.
rv = mContextStack.Push(element, mState);
if (NS_FAILED(rv)) {
element->Release();
return rv;
}
// Add the attributes
rv = AddAttributes(aAttributes, aAttrLen, element);
if (NS_FAILED(rv)) return rv;
mState = eInDocumentElement;
return NS_OK;
}
nsresult
XULContentSinkImpl::OpenTag(const char16_t** aAttributes,
const uint32_t aAttrLen,
const uint32_t aLineNumber,
mozilla::dom::NodeInfo *aNodeInfo)
{
nsresult rv;
// Create the element
nsXULPrototypeElement* element;
rv = CreateElement(aNodeInfo, &element);
if (NS_FAILED(rv)) {
#ifdef PR_LOGGING
if (PR_LOG_TEST(gContentSinkLog, PR_LOG_ERROR)) {
nsAutoString anodeC;
aNodeInfo->GetName(anodeC);
PR_LOG(gContentSinkLog, PR_LOG_ERROR,
("xul: unable to create element '%s' at line %d",
NS_ConvertUTF16toUTF8(anodeC).get(),
aLineNumber));
}
#endif
return rv;
}
// Link this element to its parent.
nsPrototypeArray* children = nullptr;
rv = mContextStack.GetTopChildren(&children);
if (NS_FAILED(rv)) {
delete element;
return rv;
}
// Add the attributes
rv = AddAttributes(aAttributes, aAttrLen, element);
if (NS_FAILED(rv)) return rv;
children->AppendElement(element);
if (aNodeInfo->Equals(nsGkAtoms::script, kNameSpaceID_XHTML) ||
aNodeInfo->Equals(nsGkAtoms::script, kNameSpaceID_XUL)) {
// Do scripty things now
rv = OpenScript(aAttributes, aLineNumber);
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(mState == eInScript || mState == eInDocumentElement,
"Unexpected state");
if (mState == eInScript) {
// OpenScript has pushed the nsPrototypeScriptElement onto the
// stack, so we're done.
return NS_OK;
}
}
// Push the element onto the context stack, so that child
// containers will hook up to us as their parent.
rv = mContextStack.Push(element, mState);
if (NS_FAILED(rv)) return rv;
mState = eInDocumentElement;
return NS_OK;
}
nsresult
XULContentSinkImpl::OpenScript(const char16_t** aAttributes,
const uint32_t aLineNumber)
{
uint32_t langID = nsIProgrammingLanguage::JAVASCRIPT;
uint32_t version = JSVERSION_LATEST;
nsresult rv;
// Look for SRC attribute and look for a LANGUAGE attribute
nsAutoString src;
while (*aAttributes) {
const nsDependentString key(aAttributes[0]);
if (key.EqualsLiteral("src")) {
src.Assign(aAttributes[1]);
}
else if (key.EqualsLiteral("type")) {
nsDependentString str(aAttributes[1]);
nsContentTypeParser parser(str);
nsAutoString mimeType;
rv = parser.GetType(mimeType);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_INVALID_ARG) {
// Might as well bail out now instead of setting langID to
// nsIProgrammingLanguage::UNKNOWN and bailing out later.
return NS_OK;
}
// We do want the warning here
NS_ENSURE_SUCCESS(rv, rv);
}
if (nsContentUtils::IsJavascriptMIMEType(mimeType)) {
langID = nsIProgrammingLanguage::JAVASCRIPT;
version = JSVERSION_LATEST;
} else {
langID = nsIProgrammingLanguage::UNKNOWN;
}
if (langID != nsIProgrammingLanguage::UNKNOWN) {
// Get the version string, and ensure the language supports it.
nsAutoString versionName;
rv = parser.GetParameter("version", versionName);
if (NS_SUCCEEDED(rv)) {
version = nsContentUtils::ParseJavascriptVersion(versionName);
} else if (rv != NS_ERROR_INVALID_ARG) {
return rv;
}
}
}
else if (key.EqualsLiteral("language")) {
// Language is deprecated, and the impl in nsScriptLoader ignores the
// various version strings anyway. So we make no attempt to support
// languages other than JS for language=
nsAutoString lang(aAttributes[1]);
if (nsContentUtils::IsJavaScriptLanguage(lang)) {
version = JSVERSION_DEFAULT;
langID = nsIProgrammingLanguage::JAVASCRIPT;
}
}
aAttributes += 2;
}
// Not all script languages have a "sandbox" concept. At time of
// writing, Python is the only other language, and it does not.
// For such languages, neither any inline script nor remote script are
// safe to execute from untrusted sources.
// So for such languages, we only allow script when the document
// itself is from chrome. We then don't bother to check the
// "src=" tag - we trust chrome to do the right thing.
// (See also similar code in nsScriptLoader.cpp)
nsCOMPtr<nsIDocument> doc(do_QueryReferent(mDocument));
if (langID != nsIProgrammingLanguage::UNKNOWN &&
langID != nsIProgrammingLanguage::JAVASCRIPT &&
doc && !nsContentUtils::IsChromeDoc(doc)) {
langID = nsIProgrammingLanguage::UNKNOWN;
NS_WARNING("Non JS language called from non chrome - ignored");
}
// Don't process scripts that aren't known
if (langID != nsIProgrammingLanguage::UNKNOWN) {
nsCOMPtr<nsIScriptGlobalObject> globalObject;
if (doc)
globalObject = do_QueryInterface(doc->GetWindow());
nsRefPtr<nsXULPrototypeScript> script =
new nsXULPrototypeScript(aLineNumber, version);
if (! script)
return NS_ERROR_OUT_OF_MEMORY;
// If there is a SRC attribute...
if (! src.IsEmpty()) {
// Use the SRC attribute value to load the URL
rv = NS_NewURI(getter_AddRefs(script->mSrcURI), src, nullptr, mDocumentURL);
// Check if this document is allowed to load a script from this source
// NOTE: if we ever allow scripts added via the DOM to run, we need to
// add a CheckLoadURI call for that as well.
if (NS_SUCCEEDED(rv)) {
if (!mSecMan)
mSecMan = do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIDocument> doc = do_QueryReferent(mDocument, &rv);
if (NS_SUCCEEDED(rv)) {
rv = mSecMan->
CheckLoadURIWithPrincipal(doc->NodePrincipal(),
script->mSrcURI,
nsIScriptSecurityManager::ALLOW_CHROME);
}
}
}
if (NS_FAILED(rv)) {
return rv;
}
// Attempt to deserialize an out-of-line script from the FastLoad
// file right away. Otherwise we'll end up reloading the script and
// corrupting the FastLoad file trying to serialize it, in the case
// where it's already there.
script->DeserializeOutOfLine(nullptr, mPrototype);
}
nsPrototypeArray* children = nullptr;
rv = mContextStack.GetTopChildren(&children);
if (NS_FAILED(rv)) {
return rv;
}
children->AppendElement(script);
mConstrainSize = false;
mContextStack.Push(script, mState);
mState = eInScript;
}
return NS_OK;
}
nsresult
XULContentSinkImpl::AddAttributes(const char16_t** aAttributes,
const uint32_t aAttrLen,
nsXULPrototypeElement* aElement)
{
// Add tag attributes to the element
nsresult rv;
// Create storage for the attributes
nsXULPrototypeAttribute* attrs = nullptr;
if (aAttrLen > 0) {
attrs = new nsXULPrototypeAttribute[aAttrLen];
if (! attrs)
return NS_ERROR_OUT_OF_MEMORY;
}
aElement->mAttributes = attrs;
aElement->mNumAttributes = aAttrLen;
// Copy the attributes into the prototype
uint32_t i;
for (i = 0; i < aAttrLen; ++i) {
rv = NormalizeAttributeString(aAttributes[i * 2], attrs[i].mName);
NS_ENSURE_SUCCESS(rv, rv);
rv = aElement->SetAttrAt(i, nsDependentString(aAttributes[i * 2 + 1]),
mDocumentURL);
NS_ENSURE_SUCCESS(rv, rv);
#ifdef PR_LOGGING
if (PR_LOG_TEST(gContentSinkLog, PR_LOG_DEBUG)) {
nsAutoString extraWhiteSpace;
int32_t cnt = mContextStack.Depth();
while (--cnt >= 0)
extraWhiteSpace.AppendLiteral(" ");
nsAutoString qnameC,valueC;
qnameC.Assign(aAttributes[0]);
valueC.Assign(aAttributes[1]);
PR_LOG(gContentSinkLog, PR_LOG_DEBUG,
("xul: %.5d. %s %s=%s",
-1, // XXX pass in line number
NS_ConvertUTF16toUTF8(extraWhiteSpace).get(),
NS_ConvertUTF16toUTF8(qnameC).get(),
NS_ConvertUTF16toUTF8(valueC).get()));
}
#endif
}
return NS_OK;
}
nsresult
XULContentSinkImpl::AddText(const char16_t* aText,
int32_t aLength)
{
// Create buffer when we first need it
if (0 == mTextSize) {
mText = (char16_t *) moz_malloc(sizeof(char16_t) * 4096);
if (nullptr == mText) {
return NS_ERROR_OUT_OF_MEMORY;
}
mTextSize = 4096;
}
// Copy data from string into our buffer; flush buffer when it fills up
int32_t offset = 0;
while (0 != aLength) {
int32_t amount = mTextSize - mTextLength;
if (amount > aLength) {
amount = aLength;
}
if (0 == amount) {
if (mConstrainSize) {
nsresult rv = FlushText();
if (NS_OK != rv) {
return rv;
}
}
else {
mTextSize += aLength;
mText = (char16_t *) moz_realloc(mText, sizeof(char16_t) * mTextSize);
if (nullptr == mText) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
}
memcpy(&mText[mTextLength],aText + offset, sizeof(char16_t) * amount);
mTextLength += amount;
offset += amount;
aLength -= amount;
}
return NS_OK;
}
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