public override XmlParserState PushChar(char c, IXmlParserContext context, ref string rollback)
{
var namedObject = context.Nodes.Peek() as INamedXObject;
if (namedObject == null || namedObject.Name.Prefix != null)
{
throw new InvalidOperationException("Invalid state");
}
Debug.Assert(context.CurrentStateLength > 1 || IsValidNameStart(c),
"First character pushed to a XmlTagNameState must be a letter.");
Debug.Assert(context.CurrentStateLength > 1 || context.KeywordBuilder.Length == 0,
"Keyword builder must be empty when state begins.");
if (XmlChar.IsWhitespace(c) || c == '<' || c == '>' || c == '/' || c == '=')
{
rollback = string.Empty;
if (context.KeywordBuilder.Length == 0)
{
context.LogError("Zero-length name.");
namedObject.Name = XName.Empty;
}
else
{
string s = context.KeywordBuilder.ToString();
int i = s.IndexOf(':');
if (i < 0)
{
namedObject.Name = new XName(s);
}
else
{
namedObject.Name = new XName(s.Substring(0, i), s.Substring(i + 1));
}
}
return(Parent);
}
if (c == ':')
{
if (context.KeywordBuilder.ToString().IndexOf(':') > 0)
{
context.LogError("Unexpected ':' in name.");
}
context.KeywordBuilder.Append(c);
return(null);
}
if (XmlChar.IsNameChar(c))
{
context.KeywordBuilder.Append(c);
return(null);
}
rollback = string.Empty;
context.LogError("Unexpected character '" + c + "' in name");
return(Parent);
}
public override XmlParserState PushChar (char c, IXmlParserContext context, ref string rollback)
{
var namedObject = context.Nodes.Peek () as INamedXObject;
if (namedObject == null || namedObject.Name.Prefix != null)
throw new InvalidOperationException ("Invalid state");
Debug.Assert (context.CurrentStateLength > 1 || char.IsLetter (c) || c == '_',
"First character pushed to a XmlTagNameState must be a letter.");
Debug.Assert (context.CurrentStateLength > 1 || context.KeywordBuilder.Length == 0,
"Keyword builder must be empty when state begins.");
if (XmlChar.IsWhitespace (c) || c == '<' || c == '>' || c == '/' || c == '=') {
rollback = string.Empty;
if (context.KeywordBuilder.Length == 0) {
context.LogError ("Zero-length name.");
} else {
string s = context.KeywordBuilder.ToString ();
int i = s.IndexOf (':');
if (i < 0) {
namedObject.Name = new XName (s);
} else {
namedObject.Name = new XName (s.Substring (0, i), s.Substring (i + 1));
}
}
return Parent;
}
if (c == ':') {
if (context.KeywordBuilder.ToString ().IndexOf (':') > 0)
context.LogError ("Unexpected ':' in name.");
context.KeywordBuilder.Append (c);
return null;
}
if (XmlChar.IsNameChar (c)) {
context.KeywordBuilder.Append (c);
return null;
}
rollback = string.Empty;
context.LogError ("Unexpected character '" + c +"' in name");
return Parent;
}
public override XmlParserState PushChar (char c, IXmlParserContext context, ref string rollback)
{
var directive = context.Nodes.Peek () as WebFormsDirective;
if (directive == null || directive.IsComplete) {
directive = new WebFormsDirective (context.LocationMinus (4)); // 4 == <%@ + current char
context.Nodes.Push (directive);
}
if (c == '<') {
context.LogError ("Unexpected '<' in directive.");
rollback = string.Empty;
return Parent;
}
Debug.Assert (!directive.IsComplete);
if (context.StateTag != ENDING && c == '%') {
context.StateTag = ENDING;
return null;
}
if (context.StateTag == ENDING) {
if (c == '>') {
//have already checked that directive is not null, i.e. top of stack is our directive
context.Nodes.Pop ();
if (!directive.IsNamed) {
context.LogError ("Directive closed prematurely.");
} else {
directive.End (context.Location);
if (context.BuildTree) {
var container = (XContainer)context.Nodes.Peek ();
container.AddChildNode (directive);
}
}
return Parent;
}
//ending but not '>'? Error; go to end.
} else if (char.IsLetter (c)) {
rollback = string.Empty;
if (!directive.IsNamed) {
return NameState;
} else {
return AttributeState;
}
} else if (char.IsWhiteSpace (c))
return null;
rollback = string.Empty;
context.LogError ("Unexpected character '" + c + "' in tag.");
return Parent;
}
XmlParserState BuildUnquotedValue(char c, IXmlParserContext context, ref string rollback)
{
if (char.IsLetterOrDigit(c) || c == '_' || c == '.')
{
context.KeywordBuilder.Append(c);
return(null);
}
if (context.KeywordBuilder.Length == 0)
{
string fullName = ((XAttribute)context.Nodes.Peek()).Name.FullName;
context.LogError("The value of attribute '" + fullName + "' ended unexpectedly.");
rollback = string.Empty;
return(Parent);
}
var att = (XAttribute)context.Nodes.Peek();
att.Value = context.KeywordBuilder.ToString();
rollback = string.Empty;
return(Parent);
}
public override XmlParserState PushChar(char c, IXmlParserContext context, ref string rollback)
{
var ct = context.Nodes.Peek() as XClosingTag;
if (ct == null)
{
Debug.Assert(context.CurrentStateLength == 1,
"IncompleteNode must not be an XClosingTag when CurrentStateLength is 1");
ct = new XClosingTag(context.LocationMinus(3)); //3 = </ and the current char
context.Nodes.Push(ct);
}
//if tag closed
if (c == '>')
{
context.Nodes.Pop();
if (ct.IsNamed)
{
ct.End(context.Location);
// walk up tree of parents looking for matching tag
int popCount = 0;
bool found = false;
foreach (XObject node in context.Nodes)
{
popCount++;
XElement element = node as XElement;
if (element != null && element.Name == ct.Name)
{
found = true;
break;
}
}
if (!found)
{
popCount = 0;
}
//clear the stack of intermediate unclosed tags
while (popCount > 1)
{
XElement el = context.Nodes.Pop() as XElement;
if (el != null)
{
context.LogError(string.Format(
"Unclosed tag '{0}' at line {1}, column {2}.", el.Name.FullName, el.Region.BeginLine, el.Region.BeginColumn),
ct.Region);
}
popCount--;
}
//close the start tag, if we found it
if (popCount > 0)
{
if (context.BuildTree)
{
((XElement)context.Nodes.Pop()).Close(ct);
}
else
{
context.Nodes.Pop();
}
}
else
{
context.LogError(
"Closing tag '" + ct.Name.FullName + "' does not match any currently open tag.",
ct.Region
);
}
}
else
{
context.LogError("Closing tag ended prematurely.");
}
return(Parent);
}
if (c == '<')
{
context.LogError("Unexpected '<' in tag.");
rollback = string.Empty;
return(Parent);
}
if (!ct.IsNamed && (char.IsLetter(c) || c == '_'))
{
rollback = string.Empty;
return(NameState);
}
rollback = string.Empty;
context.LogError("Unexpected character '" + c + "' in closing tag.");
return(Parent);
}
public override XmlParserState PushChar(char c, IXmlParserContext context, ref string rollback)
{
XElement element = context.Nodes.Peek() as XElement;
if (element == null || element.IsComplete)
{
var parent = element;
element = new XElement(context.LocationMinus(2)); // 2 == < + current char
element.Parent = parent;
context.Nodes.Push(element);
}
if (c == '<')
{
if (element.IsNamed)
{
context.LogError("Unexpected '<' in tag '" + element.Name.FullName + "'.");
Close(element, context, context.LocationMinus(1));
}
else
{
context.LogError("Unexpected '<' in unnamed tag.");
}
rollback = string.Empty;
return(Parent);
}
Debug.Assert(!element.IsComplete);
if (element.IsClosed && c != '>')
{
if (char.IsWhiteSpace(c))
{
context.LogWarning("Unexpected whitespace after '/' in self-closing tag.");
return(null);
}
context.LogError("Unexpected character '" + c + "' after '/' in self-closing tag.");
context.Nodes.Pop();
return(Parent);
}
//if tag closed
if (c == '>')
{
if (context.StateTag == MAYBE_SELF_CLOSING)
{
element.Close(element);
}
if (!element.IsNamed)
{
context.LogError("Tag closed prematurely.");
}
else
{
Close(element, context, context.Location);
}
return(Parent);
}
if (c == '/')
{
context.StateTag = MAYBE_SELF_CLOSING;
return(null);
}
if (context.StateTag == ATTEMPT_RECOVERY)
{
if (XmlChar.IsWhitespace(c))
{
context.StateTag = RECOVERY_FOUND_WHITESPACE;
}
return(null);
}
if (context.StateTag == RECOVERY_FOUND_WHITESPACE)
{
if (!XmlChar.IsFirstNameChar(c))
{
return(null);
}
}
context.StateTag = OK;
if (!element.IsNamed && XmlChar.IsFirstNameChar(c))
{
rollback = string.Empty;
return(NameState);
}
if (context.CurrentStateLength > 1 && XmlChar.IsFirstNameChar(c))
{
rollback = string.Empty;
return(AttributeState);
}
if (XmlChar.IsWhitespace(c))
{
return(null);
}
context.LogError("Unexpected character '" + c + "' in tag.", context.LocationMinus(1));
context.StateTag = ATTEMPT_RECOVERY;
return(null);
}
public override XmlParserState PushChar(char c, IXmlParserContext context, ref string rollback)
{
var att = context.Nodes.Peek() as XAttribute;
//state has just been entered
if (context.CurrentStateLength == 1)
{
if (context.PreviousState is XmlNameState)
{
//error parsing name
if (!att.IsNamed)
{
context.Nodes.Pop();
rollback = string.Empty;
return(Parent);
}
context.StateTag = GETTINGEQ;
}
else if (context.PreviousState is XmlAttributeValueState)
{
//Got value, so end attribute
context.Nodes.Pop();
att.End(context.LocationMinus(1));
IAttributedXObject element = (IAttributedXObject)context.Nodes.Peek();
if (element.Attributes.Get(att.Name, false) != null)
{
context.LogError("'" + att.Name + "' is a duplicate attribute name.", att.Region);
}
element.Attributes.AddAttribute(att);
rollback = string.Empty;
return(Parent);
}
else
{
//starting a new attribute
Debug.Assert(att == null);
Debug.Assert(context.StateTag == NAMING);
att = new XAttribute(context.LocationMinus(1));
context.Nodes.Push(att);
rollback = string.Empty;
return(XmlNameState);
}
}
if (context.StateTag == GETTINGEQ)
{
if (char.IsWhiteSpace(c))
{
return(null);
}
if (c == '=')
{
context.StateTag = GETTINGVAL;
return(null);
}
context.LogError("Expecting = in attribute, got '" + c + "'.");
}
else if (context.StateTag == GETTINGVAL)
{
if (char.IsWhiteSpace(c))
{
return(null);
}
rollback = string.Empty;
return(AttributeValueState);
}
else if (c != '<')
{
//parent handles message for '<'
context.LogError("Unexpected character '" + c + "' in attribute.");
}
if (att != null)
{
context.Nodes.Pop();
}
rollback = string.Empty;
return(Parent);
}
public override XmlParserState PushChar (char c, IXmlParserContext context, ref string rollback)
{
var doc = context.Nodes.Peek () as XDocType;
if (doc == null) {
doc = new XDocType (context.LocationMinus ("<!DOCTYPE".Length + 1));
context.Nodes.Push (doc);
}
if (!doc.RootElement.IsValid) {
if (XmlChar.IsWhitespace (c))
return null;
else if (XmlChar.IsFirstNameChar (c)) {
rollback = "";
return nameState;
}
}
else if (doc.PublicFpi == null) {
if (context.StateTag == 0) {
if (c == 's' || c == 'S') {
context.StateTag = 1;
return null;
} else if (c == 'p' || c == 'P') {
context.StateTag = -1;
return null;
} if (XmlChar.IsWhitespace (c)) {
return null;
}
} else if (Math.Abs (context.StateTag) < 6) {
if (context.StateTag > 0) {
if ("YSTEM"[context.StateTag - 1] == c || "ystem"[context.StateTag - 1] == c) {
context.StateTag++;
if (context.StateTag == 6) {
context.StateTag = 0;
doc.PublicFpi = "";
}
return null;
}
} else {
int absState = Math.Abs (context.StateTag) - 1;
if ("UBLIC"[absState] == c || "ublic"[absState] == c) {
context.StateTag--;
return null;
}
}
} else {
if (context.KeywordBuilder.Length == 0) {
if (XmlChar.IsWhitespace (c))
return null;
else if (c == '"') {
context.KeywordBuilder.Append (c);
return null;
}
} else {
if (c == '"') {
context.KeywordBuilder.Remove (0,1);
doc.PublicFpi = context.KeywordBuilder.ToString ();
context.KeywordBuilder.Length = 0;
context.StateTag = 0;
} else {
context.KeywordBuilder.Append (c);
}
return null;
}
}
}
else if (doc.Uri == null) {
if (context.KeywordBuilder.Length == 0) {
if (XmlChar.IsWhitespace (c))
return null;
else if (c == '"') {
context.KeywordBuilder.Append (c);
return null;
}
} else {
if (c == '"') {
context.KeywordBuilder.Remove (0,1);
doc.Uri = context.KeywordBuilder.ToString ();
context.KeywordBuilder.Length = 0;
} else {
context.KeywordBuilder.Append (c);
}
return null;
}
}
else if (doc.InternalDeclarationRegion.EndLine <= 0) {
if (XmlChar.IsWhitespace (c))
return null;
switch (context.StateTag) {
case 0:
if (c == '[') {
doc.InternalDeclarationRegion = new DocumentRegion (context.Location, DocumentLocation.Empty);
context.StateTag = 1;
return null;
}
break;
case 1:
if (c == '<') {
context.StateTag = 2;
return null;
} else if (c == ']') {
context.StateTag = 0;
doc.InternalDeclarationRegion = new DocumentRegion (doc.InternalDeclarationRegion.Begin, context.Location);
return null;
}
break;
case 2:
if (c == '>') {
context.StateTag = 1;
}
return null;
default:
throw new InvalidOperationException ();
}
}
doc = (XDocType)context.Nodes.Pop ();
if (c == '<') {
rollback = string.Empty;
context.LogError ("Doctype ended prematurely.");
} else if (c != '>') {
context.LogError ("Unexpected character '" + c +"' in doctype.");
}
if (context.BuildTree) {
doc.End (context.Location);
((XContainer) context.Nodes.Peek ()).AddChildNode (doc);
}
return Parent;
}
public override XmlParserState PushChar(char c, IXmlParserContext context, ref string rollback)
{
var maskedTag = (AttState)((context.StateTag & TagMask) >> XmlAttributeValueState.TagShift);
switch (maskedTag)
{
case AttState.Incoming:
if (c == '<')
{
SetTag(context, AttState.Bracket);
return(null);
}
return(base.PushChar(c, context, ref rollback));
case AttState.Bracket:
if (c == '%')
{
SetTag(context, AttState.Percent);
return(null);
}
rollback = "<";
return(Parent);
case AttState.Percent:
if (c == '-')
{
SetTag(context, AttState.PercentDash);
return(null);
}
if (c == '@')
{
context.LogError(GettextCatalog.GetString("Invalid directive location"));
rollback = "<%";
return(Parent);
}
WebFormsExpressionState.AddExpressionNode(c, context);
SetTag(context, AttState.Expression);
return(null);
case AttState.PercentDash:
if (c == '-')
{
context.Nodes.Push(new WebFormsServerComment(context.LocationMinus(4)));
SetTag(context, AttState.Comment);
return(null);
}
context.LogError(GettextCatalog.GetString("Malformed server comment"));
rollback = "<%-";
return(Parent);
case AttState.Expression:
if (c == '%')
{
SetTag(context, AttState.EndPercent);
}
return(null);
case AttState.EndPercent:
if (c == '>')
{
//TODO: attach nodes
var n = context.Nodes.Pop();
n.End(context.Location);
SetTag(context, AttState.Incoming);
//ensure attribute get closed if value is unquoted
var baseState = (context.StateTag & XmlAttributeValueState.TagMask);
if (baseState == FREE || baseState == UNQUOTED)
{
var att = (XAttribute)context.Nodes.Peek();
att.Value = "";
return(Parent);
}
return(null);
}
SetTag(context, AttState.Expression);
return(null);
case AttState.Comment:
if (c == '-')
{
SetTag(context, AttState.EndDash);
}
return(null);
case AttState.EndDash:
if (c == '-')
{
SetTag(context, AttState.EndDashDash);
}
else
{
SetTag(context, AttState.Comment);
}
return(null);
case AttState.EndDashDash:
if (c == '%')
{
SetTag(context, AttState.EndDashDashPercent);
}
else if (c != '-')
{
SetTag(context, AttState.Comment);
}
return(null);
case AttState.EndDashDashPercent:
if (c == '>')
{
//TODO: attach nodes
var n = context.Nodes.Pop();
n.End(context.Location);
SetTag(context, AttState.Incoming);
return(null);
}
SetTag(context, AttState.Comment);
return(null);
default:
return(base.PushChar(c, context, ref rollback));
}
}
public override XmlParserState PushChar (char c, IXmlParserContext context, ref string rollback)
{
if (c == '<') {
if (context.StateTag != FREE)
context.LogError ("Incomplete tag opening; encountered unexpected '<'.",
new DomRegion (
context.LocationMinus (LengthFromOpenBracket (context) + 1),
context.LocationMinus (1)));
context.StateTag = BRACKET;
return null;
}
switch (context.StateTag) {
case FREE:
//FIXME: handle entities?
return null;
case BRACKET:
if (c == '?') {
rollback = string.Empty;
return this.ProcessingInstructionState;
} else if (c == '!') {
context.StateTag = BRACKET_EXCLAM;
return null;
} else if (c == '/') {
return this.ClosingTagState;
} else if (char.IsLetter (c) || c == '_') {
rollback = string.Empty;
return TagState;
}
break;
case BRACKET_EXCLAM:
if (c == '[') {
context.StateTag = CDATA;
return null;
} else if (c == '-') {
context.StateTag = COMMENT;
return null;
} else if (c == 'D') {
context.StateTag = DOCTYPE;
return null;
}
break;
case COMMENT:
if (c == '-')
return CommentState;
break;
case CDATA:
string cdataStr = "CDATA[";
if (c == cdataStr [context.KeywordBuilder.Length]) {
context.KeywordBuilder.Append (c);
if (context.KeywordBuilder.Length < cdataStr.Length)
return null;
return CDataState;
}
context.KeywordBuilder.Length = 0;
break;
case DOCTYPE:
string docTypeStr = "OCTYPE";
if (c == docTypeStr [context.KeywordBuilder.Length]) {
context.KeywordBuilder.Append (c);
if (context.KeywordBuilder.Length < docTypeStr.Length)
return null;
return DocTypeState;
} else {
context.KeywordBuilder.Length = 0;
}
break;
}
context.LogError ("Incomplete tag opening; encountered unexpected character '" + c + "'.",
new DomRegion (
context.LocationMinus (LengthFromOpenBracket (context)),
context.Location));
context.StateTag = FREE;
return null;
}
public override XmlParserState PushChar (char c, IXmlParserContext context, ref string rollback)
{
var maskedTag = (AttState) ((context.StateTag & TagMask) >> XmlAttributeValueState.TagShift);
switch (maskedTag) {
case AttState.Incoming:
if (c == '<') {
SetTag (context, AttState.Bracket);
return null;
}
return base.PushChar (c, context, ref rollback);
case AttState.Bracket:
if (c == '%') {
SetTag (context, AttState.Percent);
return null;
}
rollback = "<";
return Parent;
case AttState.Percent:
if (c == '-') {
SetTag (context, AttState.PercentDash);
return null;
}
if (c == '@') {
context.LogError (GettextCatalog.GetString ("Invalid directive location"));
rollback = "<%";
return Parent;
}
WebFormsExpressionState.AddExpressionNode (c, context);
SetTag (context, AttState.Expression);
return null;
case AttState.PercentDash:
if (c == '-') {
context.Nodes.Push (new WebFormsServerComment (context.LocationMinus (4)));
SetTag (context, AttState.Comment);
return null;
}
context.LogError (GettextCatalog.GetString ("Malformed server comment"));
rollback = "<%-";
return Parent;
case AttState.Expression:
if (c == '%')
SetTag (context, AttState.EndPercent);
return null;
case AttState.EndPercent:
if (c == '>') {
//TODO: attach nodes
var n = context.Nodes.Pop ();
n.End (context.Location);
SetTag (context, AttState.Incoming);
//ensure attribute get closed if value is unquoted
var baseState = (context.StateTag & XmlAttributeValueState.TagMask);
if (baseState == FREE || baseState == UNQUOTED) {
var att = (XAttribute)context.Nodes.Peek ();
att.Value = "";
return Parent;
}
return null;
}
SetTag (context, AttState.Expression);
return null;
case AttState.Comment:
if (c == '-')
SetTag (context, AttState.EndDash);
return null;
case AttState.EndDash:
if (c == '-')
SetTag (context, AttState.EndDashDash);
else
SetTag (context, AttState.Comment);
return null;
case AttState.EndDashDash:
if (c == '%')
SetTag (context, AttState.EndDashDashPercent);
else if (c != '-')
SetTag (context, AttState.Comment);
return null;
case AttState.EndDashDashPercent:
if (c == '>') {
//TODO: attach nodes
var n = context.Nodes.Pop ();
n.End (context.Location);
SetTag (context, AttState.Incoming);
return null;
}
SetTag (context, AttState.Comment);
return null;
default:
return base.PushChar (c, context, ref rollback);
}
}
public override XmlParserState PushChar(char c, IXmlParserContext context, ref string rollback)
{
var directive = context.Nodes.Peek() as WebFormsDirective;
if (directive == null || directive.IsComplete)
{
directive = new WebFormsDirective(context.LocationMinus(4)); // 4 == <%@ + current char
context.Nodes.Push(directive);
}
if (c == '<')
{
context.LogError("Unexpected '<' in directive.");
rollback = string.Empty;
return(Parent);
}
Debug.Assert(!directive.IsComplete);
if (context.StateTag != ENDING && c == '%')
{
context.StateTag = ENDING;
return(null);
}
if (context.StateTag == ENDING)
{
if (c == '>')
{
//have already checked that directive is not null, i.e. top of stack is our directive
context.Nodes.Pop();
if (!directive.IsNamed)
{
context.LogError("Directive closed prematurely.");
}
else
{
directive.End(context.Location);
if (context.BuildTree)
{
var container = (XContainer)context.Nodes.Peek();
container.AddChildNode(directive);
}
}
return(Parent);
}
//ending but not '>'? Error; go to end.
}
else if (char.IsLetter(c))
{
rollback = string.Empty;
if (!directive.IsNamed)
{
return(NameState);
}
else
{
return(AttributeState);
}
}
else if (char.IsWhiteSpace(c))
{
return(null);
}
rollback = string.Empty;
context.LogError("Unexpected character '" + c + "' in tag.");
return(Parent);
}
public override XmlParserState PushChar(char c, IXmlParserContext context, ref string rollback)
{
if (c == '<')
{
if (context.StateTag != FREE)
{
context.LogError(
"Incomplete tag opening; encountered unexpected '<'.",
TextSpan.FromBounds(
context.Position - LengthFromOpenBracket(context) - 1,
context.Position - 1
)
);
}
context.StateTag = BRACKET;
return(null);
}
switch (context.StateTag)
{
case FREE:
if (!char.IsWhiteSpace(c) && !char.IsControl(c))
{
rollback = string.Empty;
return(TextState);
}
return(null);
case BRACKET:
switch (c)
{
case '?':
rollback = string.Empty;
return(ProcessingInstructionState);
case '!':
context.StateTag = BRACKET_EXCLAM;
return(null);
case '/':
return(ClosingTagState);
}
if (char.IsLetter(c) || c == '_' || char.IsWhiteSpace(c))
{
rollback = string.Empty;
return(TagState);
}
break;
case BRACKET_EXCLAM:
switch (c)
{
case '[':
context.StateTag = CDATA;
return(null);
case '-':
context.StateTag = COMMENT;
return(null);
case 'D':
context.StateTag = DOCTYPE;
return(null);
}
break;
case COMMENT:
if (c == '-')
{
return(CommentState);
}
break;
case CDATA:
string cdataStr = "CDATA[";
if (c == cdataStr [context.KeywordBuilder.Length])
{
context.KeywordBuilder.Append(c);
if (context.KeywordBuilder.Length < cdataStr.Length)
{
return(null);
}
return(CDataState);
}
context.KeywordBuilder.Length = 0;
break;
case DOCTYPE:
string docTypeStr = "OCTYPE";
if (c == docTypeStr [context.KeywordBuilder.Length])
{
context.KeywordBuilder.Append(c);
if (context.KeywordBuilder.Length < docTypeStr.Length)
{
return(null);
}
return(DocTypeState);
}
else
{
context.KeywordBuilder.Length = 0;
}
break;
}
context.LogError("Incomplete tag opening; encountered unexpected character '" + c + "'.",
TextSpan.FromBounds(
context.Position - LengthFromOpenBracket(context),
context.Position));
context.StateTag = FREE;
return(null);
}
public override XmlParserState PushChar (char c, IXmlParserContext context, ref string rollback)
{
XElement element = context.Nodes.Peek () as XElement;
if (element == null || element.IsComplete) {
element = new XElement (context.LocationMinus (2)); // 2 == < + current char
context.Nodes.Push (element);
}
if (c == '<') {
if (element.IsNamed) {
context.LogError ("Unexpected '<' in tag '" + element.Name.FullName + "'.");
Close (element, context, context.LocationMinus (1));
} else {
context.LogError ("Unexpected '<' in unnamed tag.");
}
rollback = string.Empty;
return Parent;
}
Debug.Assert (!element.IsComplete);
if (element.IsClosed && c != '>') {
if (char.IsWhiteSpace (c)) {
context.LogWarning ("Unexpected whitespace after '/' in self-closing tag.");
return null;
}
context.LogError ("Unexpected character '" + c + "' after '/' in self-closing tag.");
context.Nodes.Pop ();
return Parent;
}
//if tag closed
if (c == '>') {
if (context.StateTag == MAYBE_SELF_CLOSING) {
element.Close (element);
}
if (!element.IsNamed) {
context.LogError ("Tag closed prematurely.");
} else {
Close (element, context, context.Location);
}
return Parent;
}
if (c == '/') {
context.StateTag = MAYBE_SELF_CLOSING;
return null;
}
if (context.StateTag == ATTEMPT_RECOVERY) {
if (XmlChar.IsWhitespace (c)) {
context.StateTag = RECOVERY_FOUND_WHITESPACE;
}
return null;
}
if (context.StateTag == RECOVERY_FOUND_WHITESPACE) {
if (!XmlChar.IsFirstNameChar (c))
return null;
}
context.StateTag = OK;
if (!element.IsNamed && XmlChar.IsFirstNameChar (c)) {
rollback = string.Empty;
return NameState;
}
if (context.CurrentStateLength > 1 && XmlChar.IsFirstNameChar (c)) {
rollback = string.Empty;
return AttributeState;
}
if (XmlChar.IsWhitespace (c))
return null;
context.LogError ("Unexpected character '" + c + "' in tag.", context.LocationMinus (1));
context.StateTag = ATTEMPT_RECOVERY;
return null;
}
public override XmlParserState PushChar(char c, IXmlParserContext context, ref string rollback)
{
var element = context.Nodes.Peek() as XElement;
if (element == null || element.IsEnded)
{
var parent = element;
element = new XElement(context.Position - 2)
{
Parent = parent
}; // 2 == < + current char
context.Nodes.Push(element);
if (context.BuildTree)
{
var parentContainer = (XContainer)context.Nodes.Peek(element.IsClosed ? 0 : 1);
parentContainer.AddChildNode(element);
}
}
if (c == '<')
{
if (element.IsNamed)
{
context.LogError("Unexpected '<' in tag '" + element.Name.FullName + "'.");
Close(element, context, context.Position - 1);
}
else
{
context.LogError("Tag has no name.", element.Span.Start);
}
rollback = string.Empty;
return(Parent);
}
Debug.Assert(!element.IsEnded);
if (element.IsClosed && c != '>')
{
if (char.IsWhiteSpace(c))
{
context.LogWarning("Unexpected whitespace after '/' in self-closing tag.");
return(null);
}
context.LogError("Unexpected character '" + c + "' after '/' in self-closing tag.");
context.Nodes.Pop();
return(Parent);
}
//if tag closed
if (c == '>')
{
element.HasEndBracket = true;
if (context.StateTag == MAYBE_SELF_CLOSING)
{
element.Close(element);
}
if (!element.IsNamed)
{
context.LogError("Tag closed prematurely.");
}
else
{
Close(element, context, context.Position);
}
return(Parent);
}
if (c == '/')
{
context.StateTag = MAYBE_SELF_CLOSING;
return(null);
}
if (context.StateTag == ATTEMPT_RECOVERY)
{
if (XmlChar.IsWhitespace(c))
{
context.StateTag = RECOVERY_FOUND_WHITESPACE;
}
return(null);
}
if (context.StateTag == RECOVERY_FOUND_WHITESPACE)
{
if (!XmlChar.IsFirstNameChar(c))
{
return(null);
}
}
context.StateTag = FREE;
if (context.CurrentStateLength > 1 && XmlChar.IsFirstNameChar(c))
{
rollback = string.Empty;
return(AttributeState);
}
if (!element.IsNamed && XmlChar.IsFirstNameChar(c))
{
rollback = string.Empty;
return(NameState);
}
if (XmlChar.IsWhitespace(c))
{
return(null);
}
context.LogError("Unexpected character '" + c + "' in tag.", context.Position - 1);
context.StateTag = ATTEMPT_RECOVERY;
return(null);
}
XmlParserState BuildUnquotedValue (char c, IXmlParserContext context, ref string rollback)
{
if (char.IsLetterOrDigit (c) || c == '_' || c == '.') {
context.KeywordBuilder.Append (c);
return null;
}
if (context.KeywordBuilder.Length == 0) {
string fullName = ((XAttribute)context.Nodes.Peek ()).Name.FullName;
context.LogError ("The value of attribute '" + fullName + "' ended unexpectedly.");
rollback = string.Empty;
return Parent;
}
var att = (XAttribute)context.Nodes.Peek ();
att.Value = context.KeywordBuilder.ToString ();
rollback = string.Empty;
return Parent;
}
public override XmlParserState PushChar(char c, IXmlParserContext context, ref string rollback)
{
var doc = context.Nodes.Peek() as XDocType;
if (doc == null)
{
doc = new XDocType(context.LocationMinus("<!DOCTYPE".Length + 1));
context.Nodes.Push(doc);
}
if (!doc.RootElement.IsValid)
{
if (XmlChar.IsWhitespace(c))
{
return(null);
}
else if (XmlChar.IsFirstNameChar(c))
{
rollback = "";
return(nameState);
}
}
else if (doc.PublicFpi == null)
{
if (context.StateTag == 0)
{
if (c == 's' || c == 'S')
{
context.StateTag = 1;
return(null);
}
else if (c == 'p' || c == 'P')
{
context.StateTag = -1;
return(null);
}
if (XmlChar.IsWhitespace(c))
{
return(null);
}
}
else if (Math.Abs(context.StateTag) < 6)
{
if (context.StateTag > 0)
{
if ("YSTEM"[context.StateTag - 1] == c || "ystem"[context.StateTag - 1] == c)
{
context.StateTag++;
if (context.StateTag == 6)
{
context.StateTag = 0;
doc.PublicFpi = "";
}
return(null);
}
}
else
{
int absState = Math.Abs(context.StateTag) - 1;
if ("UBLIC"[absState] == c || "ublic"[absState] == c)
{
context.StateTag--;
return(null);
}
}
}
else
{
if (context.KeywordBuilder.Length == 0)
{
if (XmlChar.IsWhitespace(c))
{
return(null);
}
else if (c == '"')
{
context.KeywordBuilder.Append(c);
return(null);
}
}
else
{
if (c == '"')
{
context.KeywordBuilder.Remove(0, 1);
doc.PublicFpi = context.KeywordBuilder.ToString();
context.KeywordBuilder.Length = 0;
context.StateTag = 0;
}
else
{
context.KeywordBuilder.Append(c);
}
return(null);
}
}
}
else if (doc.Uri == null)
{
if (context.KeywordBuilder.Length == 0)
{
if (XmlChar.IsWhitespace(c))
{
return(null);
}
else if (c == '"')
{
context.KeywordBuilder.Append(c);
return(null);
}
}
else
{
if (c == '"')
{
context.KeywordBuilder.Remove(0, 1);
doc.Uri = context.KeywordBuilder.ToString();
context.KeywordBuilder.Length = 0;
}
else
{
context.KeywordBuilder.Append(c);
}
return(null);
}
}
else if (doc.InternalDeclarationRegion.EndLine <= 0)
{
if (XmlChar.IsWhitespace(c))
{
return(null);
}
switch (context.StateTag)
{
case 0:
if (c == '[')
{
doc.InternalDeclarationRegion = new DomRegion(context.Location, TextLocation.Empty);
context.StateTag = 1;
return(null);
}
break;
case 1:
if (c == '<')
{
context.StateTag = 2;
return(null);
}
else if (c == ']')
{
context.StateTag = 0;
doc.InternalDeclarationRegion = new DomRegion(doc.InternalDeclarationRegion.Begin, context.Location);
return(null);
}
break;
case 2:
if (c == '>')
{
context.StateTag = 1;
}
return(null);
default:
throw new InvalidOperationException();
}
}
doc = (XDocType)context.Nodes.Pop();
if (c == '<')
{
rollback = string.Empty;
context.LogError("Doctype ended prematurely.");
}
else if (c != '>')
{
context.LogError("Unexpected character '" + c + "' in doctype.");
}
if (context.BuildTree)
{
doc.End(context.Location);
((XContainer)context.Nodes.Peek()).AddChildNode(doc);
}
return(Parent);
}
public override XmlParserState PushChar(char c, IXmlParserContext context, ref string rollback)
{
if (c == '<')
{
if (context.StateTag != FREE)
{
context.LogError("Incomplete tag opening; encountered unexpected '<'.",
new DomRegion(
context.LocationMinus(LengthFromOpenBracket(context) + 1),
context.LocationMinus(1)));
}
context.StateTag = BRACKET;
return(null);
}
switch (context.StateTag)
{
case FREE:
//FIXME: handle entities?
return(null);
case BRACKET:
if (c == '?')
{
rollback = string.Empty;
return(this.ProcessingInstructionState);
}
else if (c == '!')
{
context.StateTag = BRACKET_EXCLAM;
return(null);
}
else if (c == '/')
{
return(this.ClosingTagState);
}
else if (char.IsLetter(c) || c == '_')
{
rollback = string.Empty;
return(TagState);
}
break;
case BRACKET_EXCLAM:
if (c == '[')
{
context.StateTag = CDATA;
return(null);
}
else if (c == '-')
{
context.StateTag = COMMENT;
return(null);
}
else if (c == 'D')
{
context.StateTag = DOCTYPE;
return(null);
}
break;
case COMMENT:
if (c == '-')
{
return(CommentState);
}
break;
case CDATA:
string cdataStr = "CDATA[";
if (c == cdataStr [context.KeywordBuilder.Length])
{
context.KeywordBuilder.Append(c);
if (context.KeywordBuilder.Length < cdataStr.Length)
{
return(null);
}
return(CDataState);
}
context.KeywordBuilder.Length = 0;
break;
case DOCTYPE:
string docTypeStr = "OCTYPE";
if (c == docTypeStr [context.KeywordBuilder.Length])
{
context.KeywordBuilder.Append(c);
if (context.KeywordBuilder.Length < docTypeStr.Length)
{
return(null);
}
return(DocTypeState);
}
else
{
context.KeywordBuilder.Length = 0;
}
break;
}
context.LogError("Incomplete tag opening; encountered unexpected character '" + c + "'.",
new DomRegion(
context.LocationMinus(LengthFromOpenBracket(context)),
context.Location));
context.StateTag = FREE;
return(null);
}
public override XmlParserState PushChar (char c, IXmlParserContext context, ref string rollback)
{
var ct = context.Nodes.Peek () as XClosingTag;
if (ct == null) {
Debug.Assert (context.CurrentStateLength == 1,
"IncompleteNode must not be an XClosingTag when CurrentStateLength is 1");
ct = new XClosingTag (context.LocationMinus (3)); //3 = </ and the current char
context.Nodes.Push (ct);
}
//if tag closed
if (c == '>') {
context.Nodes.Pop ();
if (ct.IsNamed) {
ct.End (context.Location);
// walk up tree of parents looking for matching tag
int popCount = 0;
bool found = false;
foreach (XObject node in context.Nodes) {
popCount++;
XElement element = node as XElement;
if (element != null && element.Name == ct.Name) {
found = true;
break;
}
}
if (!found)
popCount = 0;
//clear the stack of intermediate unclosed tags
while (popCount > 1) {
XElement el = context.Nodes.Pop () as XElement;
if (el != null)
context.LogError (string.Format (
"Unclosed tag '{0}' at line {1}, column {2}.", el.Name.FullName, el.Region.BeginLine, el.Region.BeginColumn),
ct.Region);
popCount--;
}
//close the start tag, if we found it
if (popCount > 0) {
if (context.BuildTree)
((XElement) context.Nodes.Pop ()).Close (ct);
else
context.Nodes.Pop ();
} else {
context.LogError (
"Closing tag '" + ct.Name.FullName + "' does not match any currently open tag.",
ct.Region
);
}
} else {
context.LogError ("Closing tag ended prematurely.");
}
return Parent;
}
if (c == '<') {
context.LogError ("Unexpected '<' in tag.", context.LocationMinus (1));
context.Nodes.Pop ();
rollback = string.Empty;
return Parent;
}
if (XmlChar.IsWhitespace (c)) {
return null;
}
if (!ct.IsNamed && (char.IsLetter (c) || c == '_')) {
rollback = string.Empty;
return NameState;
}
rollback = string.Empty;
context.LogError ("Unexpected character '" + c + "' in closing tag.", context.LocationMinus (1));
context.Nodes.Pop ();
return Parent;
}
public override XmlParserState PushChar (char c, IXmlParserContext context, ref string rollback)
{
var att = context.Nodes.Peek () as XAttribute;
//state has just been entered
if (context.CurrentStateLength == 1) {
if (context.PreviousState is XmlNameState) {
//error parsing name
if (!att.IsNamed) {
context.Nodes.Pop ();
rollback = string.Empty;
return Parent;
}
context.StateTag = GETTINGEQ;
}
else if (context.PreviousState is XmlAttributeValueState) {
//Got value, so end attribute
context.Nodes.Pop ();
att.End (context.LocationMinus (1));
IAttributedXObject element = (IAttributedXObject) context.Nodes.Peek ();
element.Attributes.AddAttribute (att);
rollback = string.Empty;
return Parent;
}
else {
//starting a new attribute
Debug.Assert (att == null);
Debug.Assert (context.StateTag == NAMING);
att = new XAttribute (context.LocationMinus (1));
context.Nodes.Push (att);
rollback = string.Empty;
return XmlNameState;
}
}
if (context.StateTag == GETTINGEQ) {
if (char.IsWhiteSpace (c)) {
return null;
}
if (c == '=') {
context.StateTag = GETTINGVAL;
return null;
}
context.LogError ("Expecting = in attribute, got '" + c + "'.");
} else if (context.StateTag == GETTINGVAL) {
if (char.IsWhiteSpace (c)) {
return null;
}
rollback = string.Empty;
return AttributeValueState;
} else if (c != '<') {
//parent handles message for '<'
context.LogError ("Unexpected character '" + c + "' in attribute.");
}
if (att != null)
context.Nodes.Pop ();
rollback = string.Empty;
return Parent;
}