/// <summary>
/// Push element onto stack
/// </summary>
/// <param name="e"></param>
private void Push(Element e) {
string name = e.Name;
string localName = e.LocalName;
string ns = e.Namespace;
string prefix = PrefixOf(name);
// System.err.println("%% Pushing " + name);
e.Clean();
if (!_namespaces) {
ns = localName = "";
}
if (_virginStack && localName.Equals(_doctypeName, StringComparison.OrdinalIgnoreCase)) {
try {
_entityResolver.ResolveEntity(_doctypePublicId, _doctypeSystemId);
} catch (IOException ew) {
} // Can't be thrown for root I believe.
}
if (Foreign(prefix, ns)) {
_contentHandler.StartPrefixMapping(prefix, ns);
// System.err.println("%% Mapping [" + prefix + "] for elements to " + namespace);
}
Attributes atts = e.Attributes;
int len = atts.Length;
for (int i = 0; i < len; i++) {
string attNamespace = atts.GetUri(i);
string attPrefix = PrefixOf(atts.GetQName(i));
if (Foreign(attPrefix, attNamespace)) {
_contentHandler.StartPrefixMapping(attPrefix, attNamespace);
// System.err.println("%% Mapping [" + attPrefix + "] for attributes to " + attNamespace);
}
}
_contentHandler.StartElement(ns, localName, name, e.Attributes);
e.Next = _stack;
_stack = e;
_virginStack = false;
if (_cdataElements && (_stack.Flags & Schema.F_CDATA) != 0) {
_scanner.StartCDATA();
}
}
/// <summary>
/// Pop the stack irrevocably
/// </summary>
private void Pop() {
if (_stack == null) {
return; // empty stack
}
string name = _stack.Name;
string localName = _stack.LocalName;
string ns = _stack.Namespace;
string prefix = PrefixOf(name);
// System.err.println("%% Popping " + name);
if (!_namespaces) {
ns = localName = "";
}
_contentHandler.EndElement(ns, localName, name);
if (Foreign(prefix, ns)) {
_contentHandler.EndPrefixMapping(prefix);
// System.err.println("%% Unmapping [" + prefix + "] for elements to " + namespace);
}
Attributes atts = _stack.Attributes;
for (int i = atts.Length - 1; i >= 0; i--) {
string attNamespace = atts.GetUri(i);
string attPrefix = PrefixOf(atts.GetQName(i));
if (Foreign(attPrefix, attNamespace)) {
_contentHandler.EndPrefixMapping(attPrefix);
// System.err.println("%% Unmapping [" + attPrefix + "] for attributes to " + attNamespace);
}
}
_stack = _stack.Next;
}
/// <summary>
/// Pop the stack restartably
/// </summary>
private void RestartablyPop() {
Element popped = _stack;
Pop();
if (_restartElements && (popped.Flags & Schema.F_RESTART) != 0) {
popped.Anonymize();
popped.Next = _saved;
_saved = popped;
}
}
public void ETagBasic(char[] buff, int offset, int length) {
_newElement = null;
string name;
if (length != 0) {
// Canonicalize case of name
name = MakeName(buff, offset, length);
// System.err.println("got etag [" + name + "]");
ElementType type = _schema.GetElementType(name);
if (type == null) {
return; // mysterious end-tag
}
name = type.Name;
} else {
name = _stack.Name;
}
// System.err.println("%% Got end of " + name);
Element sp;
bool inNoforce = false;
for (sp = _stack; sp != null; sp = sp.Next) {
if (sp.Name.Equals(name)) {
break;
}
if ((sp.Flags & Schema.F_NOFORCE) != 0) {
inNoforce = true;
}
}
if (sp == null) {
return; // Ignore unknown etags
}
if (sp.Next == null || sp.Next.Next == null) {
return;
}
if (inNoforce) {
// inside an F_NOFORCE element?
sp.Preclose(); // preclose the matching element
} else {
// restartably pop everything above us
while (_stack != sp) {
RestartablyPop();
}
Pop();
}
// pop any preclosed elements now at the top
while (_stack.IsPreclosed) {
Pop();
}
Restart(null);
}
/// <summary>
/// Push restartables on the stack if possible
/// e is the next element to be started, if we know what it is
/// </summary>
/// <param name="e"></param>
private void Restart(Element e) {
while (_saved != null && _stack.CanContain(_saved) && (e == null || _saved.CanContain(e))) {
Element next = _saved.Next;
Push(_saved);
_saved = next;
}
}
// Sets up instance variables that haven't been set by setFeature
private void Setup() {
if (_schema == null) {
_schema = new HTMLSchema();
}
if (_scanner == null) {
_scanner = new HTMLScanner();
}
if (_autoDetector == null) {
_autoDetector = new AutoDetectorDelegate(stream => new StreamReader(stream));
}
_stack = new Element(_schema.GetElementType("<root>"), _defaultAttributes);
_pcdata = new Element(_schema.GetElementType("<pcdata>"), _defaultAttributes);
_newElement = null;
_attributeName = null;
_piTarget = null;
_saved = null;
_entity = 0;
_virginStack = true;
_doctypeName = _doctypePublicId = _doctypeSystemId = null;
}
public void GI(char[] buff, int offset, int length) {
if (_newElement != null) {
return;
}
string name = MakeName(buff, offset, length);
if (name == null) {
return;
}
ElementType type = _schema.GetElementType(name);
if (type == null) {
// Suppress unknown elements if ignore-bogons is on
if (_ignoreBogons) {
return;
}
int bogonModel = (_bogonsEmpty ? Schema.M_EMPTY : Schema.M_ANY);
int bogonMemberOf = (_rootBogons ? Schema.M_ANY : (Schema.M_ANY & ~ Schema.M_ROOT));
_schema.ElementType(name, bogonModel, bogonMemberOf, 0);
if (!_rootBogons) {
_schema.Parent(name, _schema.RootElementType.Name);
}
type = _schema.GetElementType(name);
}
_newElement = new Element(type, _defaultAttributes);
// System.err.println("%% Got GI " + theNewElement.name());
}
/// <summary>
/// Creates a new instance of <see cref="Parser" />
/// </summary>
public Parser() {
_newElement = null;
_contentHandler = this;
_lexicalHandler = this;
_dtdHandler = this;
_errorHandler = this;
_entityResolver = this;
}
/// <summary>
/// Rectify the stack, pushing and popping as needed
/// so that the argument can be safely pushed
/// </summary>
/// <param name="e"></param>
private void Rectify(Element e) {
Element sp;
while (true) {
for (sp = _stack; sp != null; sp = sp.Next) {
if (sp.CanContain(e)) {
break;
}
}
if (sp != null) {
break;
}
ElementType parentType = e.Parent;
if (parentType == null) {
break;
}
var parent = new Element(parentType, _defaultAttributes);
// System.err.println("%% Ascending from " + e.name() + " to " + parent.name());
parent.Next = e;
e = parent;
}
if (sp == null) {
return; // don't know what to do
}
while (_stack != sp) {
if (_stack == null || _stack.Next == null || _stack.Next.Next == null) {
break;
}
RestartablyPop();
}
while (e != null) {
Element nexte = e.Next;
if (!e.Name.Equals("<pcdata>")) {
Push(e);
}
e = nexte;
Restart(e);
}
_newElement = null;
}
/// <summary>
/// Return true if the type of this element can contain the type of
/// another element.
/// Convenience method.
/// </summary>
/// <param name="other">
/// The other element
/// </param>
public bool CanContain(Element other) {
return _type.CanContain(other._type);
}
