NS_IMETHODIMP
nsXMLContentSerializer::AppendElementEnd(nsIDOMElement *aElement,
nsAString& aStr)
{
NS_ENSURE_ARG(aElement);
// We don't output a separate end tag for empty element
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(aElement));
PRBool hasChildren;
if (NS_SUCCEEDED(node->HasChildNodes(&hasChildren)) && !hasChildren) {
PopNameSpaceDeclsFor(aElement);
return NS_OK;
}
nsCOMPtr<nsIContent> content(do_QueryInterface(aElement));
if (!content) return NS_ERROR_FAILURE;
nsAutoString tagPrefix, tagLocalName, tagNamespaceURI;
aElement->GetPrefix(tagPrefix);
aElement->GetLocalName(tagLocalName);
aElement->GetNamespaceURI(tagNamespaceURI);
#ifdef DEBUG
PRBool debugNeedToPushNamespace =
#endif
ConfirmPrefix(tagPrefix, tagNamespaceURI, aElement, PR_FALSE);
NS_ASSERTION(!debugNeedToPushNamespace, "Can't push namespaces in closing tag!");
AppendToString(NS_LITERAL_STRING("</"), aStr);
if (!tagPrefix.IsEmpty()) {
AppendToString(tagPrefix, aStr);
AppendToString(NS_LITERAL_STRING(":"), aStr);
}
AppendToString(tagLocalName, aStr);
AppendToString(NS_LITERAL_STRING(">"), aStr);
MaybeFlagNewline(aElement);
PopNameSpaceDeclsFor(aElement);
return NS_OK;
}
bool
nsXHTMLContentSerializer::SerializeAttributes(nsIContent* aContent,
nsIContent *aOriginalElement,
nsAString& aTagPrefix,
const nsAString& aTagNamespaceURI,
nsIAtom* aTagName,
nsAString& aStr,
uint32_t aSkipAttr,
bool aAddNSAttr)
{
nsresult rv;
uint32_t index, count;
nsAutoString prefixStr, uriStr, valueStr;
nsAutoString xmlnsStr;
xmlnsStr.AssignLiteral(kXMLNS);
int32_t contentNamespaceID = aContent->GetNameSpaceID();
// this method is not called by nsHTMLContentSerializer
// so we don't have to check HTML element, just XHTML
if (mIsCopying && kNameSpaceID_XHTML == contentNamespaceID) {
// Need to keep track of OL and LI elements in order to get ordinal number
// for the LI.
if (aTagName == nsGkAtoms::ol) {
// We are copying and current node is an OL;
// Store its start attribute value in olState->startVal.
nsAutoString start;
int32_t startAttrVal = 0;
aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::start, start);
if (!start.IsEmpty()) {
nsresult rv = NS_OK;
startAttrVal = start.ToInteger(&rv);
//If OL has "start" attribute, first LI element has to start with that value
//Therefore subtracting 1 as all the LI elements are incrementing it before using it;
//In failure of ToInteger(), default StartAttrValue to 0.
if (NS_SUCCEEDED(rv))
--startAttrVal;
else
startAttrVal = 0;
}
olState state (startAttrVal, true);
mOLStateStack.AppendElement(state);
}
else if (aTagName == nsGkAtoms::li) {
mIsFirstChildOfOL = IsFirstChildOfOL(aOriginalElement);
if (mIsFirstChildOfOL) {
// If OL is parent of this LI, serialize attributes in different manner.
NS_ENSURE_TRUE(SerializeLIValueAttribute(aContent, aStr), false);
}
}
}
// If we had to add a new namespace declaration, serialize
// and push it on the namespace stack
if (aAddNSAttr) {
if (aTagPrefix.IsEmpty()) {
// Serialize default namespace decl
NS_ENSURE_TRUE(SerializeAttr(EmptyString(), xmlnsStr,
aTagNamespaceURI,
aStr, true), false);
} else {
// Serialize namespace decl
NS_ENSURE_TRUE(SerializeAttr(xmlnsStr, aTagPrefix,
aTagNamespaceURI,
aStr, true), false);
}
PushNameSpaceDecl(aTagPrefix, aTagNamespaceURI, aOriginalElement);
}
NS_NAMED_LITERAL_STRING(_mozStr, "_moz");
count = aContent->GetAttrCount();
// Now serialize each of the attributes
// XXX Unfortunately we need a namespace manager to get
// attribute URIs.
for (index = 0; index < count; index++) {
if (aSkipAttr == index) {
continue;
}
mozilla::dom::BorrowedAttrInfo info = aContent->GetAttrInfoAt(index);
const nsAttrName* name = info.mName;
int32_t namespaceID = name->NamespaceID();
nsIAtom* attrName = name->LocalName();
nsIAtom* attrPrefix = name->GetPrefix();
// Filter out any attribute starting with [-|_]moz
nsDependentAtomString attrNameStr(attrName);
if (StringBeginsWith(attrNameStr, NS_LITERAL_STRING("_moz")) ||
StringBeginsWith(attrNameStr, NS_LITERAL_STRING("-moz"))) {
continue;
}
if (attrPrefix) {
attrPrefix->ToString(prefixStr);
}
else {
prefixStr.Truncate();
}
bool addNSAttr = false;
if (kNameSpaceID_XMLNS != namespaceID) {
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(namespaceID, uriStr);
addNSAttr = ConfirmPrefix(prefixStr, uriStr, aOriginalElement, true);
}
info.mValue->ToString(valueStr);
nsDependentAtomString nameStr(attrName);
bool isJS = false;
if (kNameSpaceID_XHTML == contentNamespaceID) {
//
// Filter out special case of <br type="_moz"> or <br _moz*>,
// used by the editor. Bug 16988. Yuck.
//
if (namespaceID == kNameSpaceID_None && aTagName == nsGkAtoms::br && attrName == nsGkAtoms::type
&& StringBeginsWith(valueStr, _mozStr)) {
continue;
}
if (mIsCopying && mIsFirstChildOfOL && (aTagName == nsGkAtoms::li)
&& (attrName == nsGkAtoms::value)) {
// This is handled separately in SerializeLIValueAttribute()
continue;
}
isJS = IsJavaScript(aContent, attrName, namespaceID, valueStr);
if (namespaceID == kNameSpaceID_None &&
((attrName == nsGkAtoms::href) ||
(attrName == nsGkAtoms::src))) {
// Make all links absolute when converting only the selection:
if (mFlags & nsIDocumentEncoder::OutputAbsoluteLinks) {
// Would be nice to handle OBJECT tags,
// but that gets more complicated since we have to
// search the tag list for CODEBASE as well.
// For now, just leave them relative.
nsCOMPtr<nsIURI> uri = aContent->GetBaseURI();
if (uri) {
nsAutoString absURI;
rv = NS_MakeAbsoluteURI(absURI, valueStr, uri);
if (NS_SUCCEEDED(rv)) {
valueStr = absURI;
}
}
}
}
if (mRewriteEncodingDeclaration && aTagName == nsGkAtoms::meta &&
attrName == nsGkAtoms::content) {
// If we're serializing a <meta http-equiv="content-type">,
// use the proper value, rather than what's in the document.
nsAutoString header;
aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::httpEquiv, header);
if (header.LowerCaseEqualsLiteral("content-type")) {
valueStr = NS_LITERAL_STRING("text/html; charset=") +
NS_ConvertASCIItoUTF16(mCharset);
}
}
// Expand shorthand attribute.
if (namespaceID == kNameSpaceID_None && IsShorthandAttr(attrName, aTagName) && valueStr.IsEmpty()) {
valueStr = nameStr;
}
}
else {
isJS = IsJavaScript(aContent, attrName, namespaceID, valueStr);
}
NS_ENSURE_TRUE(SerializeAttr(prefixStr, nameStr, valueStr, aStr, !isJS), false);
if (addNSAttr) {
NS_ASSERTION(!prefixStr.IsEmpty(),
"Namespaced attributes must have a prefix");
NS_ENSURE_TRUE(SerializeAttr(xmlnsStr, prefixStr, uriStr, aStr, true), false);
PushNameSpaceDecl(prefixStr, uriStr, aOriginalElement);
}
}
return true;
}
NS_IMETHODIMP
nsXMLContentSerializer::AppendElementStart(nsIDOMElement *aElement,
nsIDOMElement *aOriginalElement,
nsAString& aStr)
{
NS_ENSURE_ARG(aElement);
nsAutoString tagPrefix, tagLocalName, tagNamespaceURI;
nsAutoString xmlnsStr;
xmlnsStr.AssignLiteral(kXMLNS);
nsCOMPtr<nsIContent> content(do_QueryInterface(aElement));
if (!content) return NS_ERROR_FAILURE;
aElement->GetPrefix(tagPrefix);
aElement->GetLocalName(tagLocalName);
aElement->GetNamespaceURI(tagNamespaceURI);
PRUint32 index, count;
nsAutoString nameStr, prefixStr, uriStr, valueStr;
count = content->GetAttrCount();
// First scan for namespace declarations, pushing each on the stack
PRUint32 skipAttr = count;
for (index = 0; index < count; index++) {
const nsAttrName* name = content->GetAttrNameAt(index);
PRInt32 namespaceID = name->NamespaceID();
nsIAtom *attrName = name->LocalName();
if (namespaceID == kNameSpaceID_XMLNS ||
// Also push on the stack attrs named "xmlns" in the null
// namespace... because once we serialize those out they'll look like
// namespace decls. :(
// XXXbz what if we have both "xmlns" in the null namespace and "xmlns"
// in the xmlns namespace?
(namespaceID == kNameSpaceID_None &&
attrName == nsGkAtoms::xmlns)) {
content->GetAttr(namespaceID, attrName, uriStr);
if (!name->GetPrefix()) {
if (tagNamespaceURI.IsEmpty() && !uriStr.IsEmpty()) {
// If the element is in no namespace we need to add a xmlns
// attribute to declare that. That xmlns attribute must not have a
// prefix (see http://www.w3.org/TR/REC-xml-names/#dt-prefix), ie it
// must declare the default namespace. We just found an xmlns
// attribute that declares the default namespace to something
// non-empty. We're going to ignore this attribute, for children we
// will detect that we need to add it again and attributes aren't
// affected by the default namespace.
skipAttr = index;
}
else {
// Default NS attribute does not have prefix (and the name is "xmlns")
PushNameSpaceDecl(EmptyString(), uriStr, aOriginalElement);
}
}
else {
attrName->ToString(nameStr);
PushNameSpaceDecl(nameStr, uriStr, aOriginalElement);
}
}
}
PRBool addNSAttr;
MaybeAddNewline(aStr);
addNSAttr = ConfirmPrefix(tagPrefix, tagNamespaceURI, aOriginalElement,
PR_FALSE);
// Serialize the qualified name of the element
AppendToString(NS_LITERAL_STRING("<"), aStr);
if (!tagPrefix.IsEmpty()) {
AppendToString(tagPrefix, aStr);
AppendToString(NS_LITERAL_STRING(":"), aStr);
}
AppendToString(tagLocalName, aStr);
// If we had to add a new namespace declaration, serialize
// and push it on the namespace stack
if (addNSAttr) {
if (tagPrefix.IsEmpty()) {
// Serialize default namespace decl
SerializeAttr(EmptyString(), xmlnsStr, tagNamespaceURI, aStr, PR_TRUE);
} else {
// Serialize namespace decl
SerializeAttr(xmlnsStr, tagPrefix, tagNamespaceURI, aStr, PR_TRUE);
}
PushNameSpaceDecl(tagPrefix, tagNamespaceURI, aOriginalElement);
}
// Now serialize each of the attributes
// XXX Unfortunately we need a namespace manager to get
// attribute URIs.
for (index = 0; index < count; index++) {
if (skipAttr == index) {
continue;
}
const nsAttrName* name = content->GetAttrNameAt(index);
PRInt32 namespaceID = name->NamespaceID();
nsIAtom* attrName = name->LocalName();
nsIAtom* attrPrefix = name->GetPrefix();
if (attrPrefix) {
attrPrefix->ToString(prefixStr);
}
else {
prefixStr.Truncate();
}
addNSAttr = PR_FALSE;
if (kNameSpaceID_XMLNS != namespaceID) {
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(namespaceID, uriStr);
addNSAttr = ConfirmPrefix(prefixStr, uriStr, aOriginalElement, PR_TRUE);
}
content->GetAttr(namespaceID, attrName, valueStr);
attrName->ToString(nameStr);
// XXX Hack to get around the fact that MathML can add
// attributes starting with '-', which makes them
// invalid XML.
if (!nameStr.IsEmpty() && nameStr.First() == '-')
continue;
if (namespaceID == kNameSpaceID_None) {
if (content->GetNameSpaceID() == kNameSpaceID_XHTML) {
if (IsShorthandAttr(attrName, content->Tag()) &&
valueStr.IsEmpty()) {
valueStr = nameStr;
}
}
}
SerializeAttr(prefixStr, nameStr, valueStr, aStr, PR_TRUE);
if (addNSAttr) {
NS_ASSERTION(!prefixStr.IsEmpty(),
"Namespaced attributes must have a prefix");
SerializeAttr(xmlnsStr, prefixStr, uriStr, aStr, PR_TRUE);
PushNameSpaceDecl(prefixStr, uriStr, aOriginalElement);
}
}
// We don't output a separate end tag for empty element
PRBool hasChildren;
if (NS_FAILED(aOriginalElement->HasChildNodes(&hasChildren)) ||
!hasChildren) {
AppendToString(NS_LITERAL_STRING("/>"), aStr);
MaybeFlagNewline(aElement);
} else {
AppendToString(NS_LITERAL_STRING(">"), aStr);
}
return NS_OK;
}
PRBool
nsXMLContentSerializer::ConfirmPrefix(nsAString& aPrefix,
const nsAString& aURI,
nsIDOMElement* aElement,
PRBool aIsAttribute)
{
if (aPrefix.EqualsLiteral(kXMLNS)) {
return PR_FALSE;
}
if (aURI.EqualsLiteral("http://www.w3.org/XML/1998/namespace")) {
// The prefix must be xml for this namespace. We don't need to declare it,
// so always just set the prefix to xml.
aPrefix.AssignLiteral("xml");
return PR_FALSE;
}
PRBool mustHavePrefix;
if (aIsAttribute) {
if (aURI.IsEmpty()) {
// Attribute in the null namespace. This just shouldn't have a prefix.
// And there's no need to push any namespace decls
aPrefix.Truncate();
return PR_FALSE;
}
// Attribute not in the null namespace -- must have a prefix
mustHavePrefix = PR_TRUE;
} else {
// Not an attribute, so doesn't _have_ to have a prefix
mustHavePrefix = PR_FALSE;
}
// Keep track of the closest prefix that's bound to aURI and whether we've
// found such a thing. closestURIMatch holds the prefix, and uriMatch
// indicates whether we actually have one.
nsAutoString closestURIMatch;
PRBool uriMatch = PR_FALSE;
// Also keep track of whether we've seen aPrefix already. If we have, that
// means that it's already bound to a URI different from aURI, so even if we
// later (so in a more outer scope) see it bound to aURI we can't reuse it.
PRBool haveSeenOurPrefix = PR_FALSE;
PRInt32 count = mNameSpaceStack.Count();
PRInt32 index = count - 1;
while (index >= 0) {
NameSpaceDecl* decl = (NameSpaceDecl*)mNameSpaceStack.ElementAt(index);
// Check if we've found a prefix match
if (aPrefix.Equals(decl->mPrefix)) {
// If the URIs match and aPrefix is not bound to any other URI, we can
// use aPrefix
if (!haveSeenOurPrefix && aURI.Equals(decl->mURI)) {
// Just use our uriMatch stuff. That will deal with an empty aPrefix
// the right way. We can break out of the loop now, though.
uriMatch = PR_TRUE;
closestURIMatch = aPrefix;
break;
}
haveSeenOurPrefix = PR_TRUE;
// If they don't, and either:
// 1) We have a prefix (so we'd be redeclaring this prefix to point to a
// different namespace) or
// 2) We're looking at an existing default namespace decl on aElement (so
// we can't create a new default namespace decl for this URI)
// then generate a new prefix. Note that we do NOT generate new prefixes
// if we happen to have aPrefix == decl->mPrefix == "" and mismatching
// URIs when |decl| doesn't have aElement as its owner. In that case we
// can simply push the new namespace URI as the default namespace for
// aElement.
if (!aPrefix.IsEmpty() || decl->mOwner == aElement) {
NS_ASSERTION(!aURI.IsEmpty(),
"Not allowed to add a xmlns attribute with an empty "
"namespace name unless it declares the default "
"namespace.");
GenerateNewPrefix(aPrefix);
// Now we need to validate our new prefix/uri combination; check it
// against the full namespace stack again. Note that just restarting
// the while loop is ok, since we haven't changed aURI, so the
// closestURIMatch and uriMatch state is not affected.
index = count - 1;
haveSeenOurPrefix = PR_FALSE;
continue;
}
}
// If we've found a URI match, then record the first one
if (!uriMatch && aURI.Equals(decl->mURI)) {
// Need to check that decl->mPrefix is not declared anywhere closer to
// us. If it is, we can't use it.
PRBool prefixOK = PR_TRUE;
PRInt32 index2;
for (index2 = count-1; index2 > index && prefixOK; --index2) {
NameSpaceDecl* decl2 =
(NameSpaceDecl*)mNameSpaceStack.ElementAt(index2);
prefixOK = (decl2->mPrefix != decl->mPrefix);
}
if (prefixOK) {
uriMatch = PR_TRUE;
closestURIMatch.Assign(decl->mPrefix);
}
}
--index;
}
// At this point the following invariants hold:
// 1) The prefix in closestURIMatch is mapped to aURI in our scope if
// uriMatch is set.
// 2) There is nothing on the namespace stack that has aPrefix as the prefix
// and a _different_ URI, except for the case aPrefix.IsEmpty (and
// possible default namespaces on ancestors)
// So if uriMatch is set it's OK to use the closestURIMatch prefix. The one
// exception is when closestURIMatch is actually empty (default namespace
// decl) and we must have a prefix.
if (uriMatch && (!mustHavePrefix || !closestURIMatch.IsEmpty())) {
aPrefix.Assign(closestURIMatch);
return PR_FALSE;
}
if (aPrefix.IsEmpty()) {
// At this point, aPrefix is empty (which means we never had a prefix to
// start with). If we must have a prefix, just generate a new prefix and
// then send it back through the namespace stack checks to make sure it's
// OK.
if (mustHavePrefix) {
GenerateNewPrefix(aPrefix);
return ConfirmPrefix(aPrefix, aURI, aElement, aIsAttribute);
}
// One final special case. If aPrefix is empty and we never saw an empty
// prefix (default namespace decl) on the namespace stack and we're in the
// null namespace there is no reason to output an |xmlns=""| here. It just
// makes the output less readable.
if (!haveSeenOurPrefix && aURI.IsEmpty()) {
return PR_FALSE;
}
}
// Now just set aURI as the new default namespace URI. Indicate that we need
// to create a namespace decl for the final prefix
return PR_TRUE;
}
