bool ReadCurrentPosition()
{
attributes = null;
attributeIndex = -1;
inAttributeValue = false;
while (true)
{
var obj = objectIterator.CurrentObject;
if (obj == null)
{
readState = ReadState.EndOfFile;
elementNodeType = XmlNodeType.None;
return(false);
}
else if (objectIterator.IsAtElementEnd)
{
elementNodeType = XmlNodeType.EndElement;
return(true);
}
else if (obj is InternalElement)
{
// element start
elementNodeType = XmlNodeType.Element;
InternalTag startTag = ((InternalTag)obj.NestedObjects[0]);
if (startTag.NestedObjects != null)
{
attributes = startTag.NestedObjects.OfType <InternalAttribute>().ToList();
}
return(true);
}
else if (obj is InternalText)
{
InternalText text = (InternalText)obj;
if (text.ContainsOnlyWhitespace)
{
elementNodeType = XmlNodeType.Whitespace;
}
else
{
elementNodeType = XmlNodeType.Text;
}
return(true);
}
else if (obj is InternalTag)
{
// start/end tags can be skipped as the parent InternalElement already handles them,
// TODO all other tags (xml decl, comments, ...)
}
else
{
throw new NotSupportedException();
}
objectIterator.MoveInto();
}
}
void MakeText(int start, int end)
{
Log.DebugAssert(end > start, "Empty text");
Log.DebugAssert(end == this.CurrentLocation, "end == current location");
InternalText text = new InternalText();
var frame = BeginInternalObject(text, start);
text.Type = TextType.Other;
text.Value = GetText(start, end);
EndInternalObject(frame);
}
internal AXmlText(AXmlObject parent, int startOffset, InternalText internalObject)
: base(parent, startOffset, internalObject)
{
}
/// <summary>
/// Reads text.
/// </summary>
void ReadText(TextType type)
{
var text = new InternalText();
var frame = BeginInternalObject(text);
text.Type = type;
int start = this.CurrentLocation;
int fragmentEnd = inputLength;
// Whitespace would be skipped anyway by any operation
TryMoveToNonWhiteSpace(fragmentEnd);
int wsEnd = this.CurrentLocation;
// Try move to the terminator given by the context
if (type == TextType.WhiteSpace)
{
TryMoveToNonWhiteSpace(fragmentEnd);
}
else if (type == TextType.CharacterData)
{
while (true)
{
if (!TryMoveToAnyOf(new char[] { '<', ']' }, fragmentEnd))
{
break; // End of fragment
}
if (TryPeek('<'))
{
break;
}
if (TryPeek(']'))
{
if (TryPeek("]]>"))
{
OnSyntaxError(this.CurrentLocation, this.CurrentLocation + 3, "']]>' is not allowed in text");
}
TryMoveNext();
continue;
}
throw new InternalException("Infinite loop");
}
}
else if (type == TextType.Comment)
{
// Do not report too many errors
bool errorReported = false;
while (true)
{
if (!TryMoveTo('-', fragmentEnd))
{
break; // End of fragment
}
if (TryPeek("-->"))
{
break;
}
if (TryPeek("--") && !errorReported)
{
OnSyntaxError(this.CurrentLocation, this.CurrentLocation + 2, "'--' is not allowed in comment");
errorReported = true;
}
TryMoveNext();
}
}
else if (type == TextType.CData)
{
while (true)
{
// We can not use use TryMoveTo("]]>", fragmentEnd) because it may incorectly accept "]" at the end of fragment
if (!TryMoveTo(']', fragmentEnd))
{
break; // End of fragment
}
if (TryPeek("]]>"))
{
break;
}
TryMoveNext();
}
}
else if (type == TextType.ProcessingInstruction)
{
while (true)
{
if (!TryMoveTo('?', fragmentEnd))
{
break; // End of fragment
}
if (TryPeek("?>"))
{
break;
}
TryMoveNext();
}
}
else if (type == TextType.UnknownBang)
{
TryMoveToAnyOf(new char[] { '<', '>' }, fragmentEnd);
}
else
{
throw new InternalException("Unknown type " + type);
}
text.ContainsOnlyWhitespace = (wsEnd == this.CurrentLocation);
string escapedValue = GetText(start, this.CurrentLocation);
if (type == TextType.CharacterData)
{
text.Value = Dereference(escapedValue, start);
}
else
{
text.Value = escapedValue;
}
text.Value = GetCachedString(text.Value);
EndInternalObject(frame, storeNewObject: this.CurrentLocation > start);
}
/// <summary>
/// Reads text.
/// </summary>
void ReadText(TextType type)
{
var text = new InternalText();
var frame = BeginInternalObject(text);
text.Type = type;
int start = this.CurrentLocation;
int fragmentEnd = inputLength;
// Whitespace would be skipped anyway by any operation
TryMoveToNonWhiteSpace(fragmentEnd);
int wsEnd = this.CurrentLocation;
// Try move to the terminator given by the context
if (type == TextType.WhiteSpace) {
TryMoveToNonWhiteSpace(fragmentEnd);
} else if (type == TextType.CharacterData) {
while(true) {
if (!TryMoveToAnyOf(new char[] {'<', ']'}, fragmentEnd)) break; // End of fragment
if (TryPeek('<')) break;
if (TryPeek(']')) {
if (TryPeek("]]>")) {
OnSyntaxError(this.CurrentLocation, this.CurrentLocation + 3, "']]>' is not allowed in text");
}
TryMoveNext();
continue;
}
throw new InternalException("Infinite loop");
}
} else if (type == TextType.Comment) {
// Do not report too many errors
bool errorReported = false;
while(true) {
if (!TryMoveTo('-', fragmentEnd)) break; // End of fragment
if (TryPeek("-->")) break;
if (TryPeek("--") && !errorReported) {
OnSyntaxError(this.CurrentLocation, this.CurrentLocation + 2, "'--' is not allowed in comment");
errorReported = true;
}
TryMoveNext();
}
} else if (type == TextType.CData) {
while(true) {
// We can not use use TryMoveTo("]]>", fragmentEnd) because it may incorectly accept "]" at the end of fragment
if (!TryMoveTo(']', fragmentEnd)) break; // End of fragment
if (TryPeek("]]>")) break;
TryMoveNext();
}
} else if (type == TextType.ProcessingInstruction) {
while(true) {
if (!TryMoveTo('?', fragmentEnd)) break; // End of fragment
if (TryPeek("?>")) break;
TryMoveNext();
}
} else if (type == TextType.UnknownBang) {
TryMoveToAnyOf(new char[] {'<', '>'}, fragmentEnd);
} else {
throw new InternalException("Unknown type " + type);
}
text.ContainsOnlyWhitespace = (wsEnd == this.CurrentLocation);
string escapedValue = GetText(start, this.CurrentLocation);
if (type == TextType.CharacterData) {
text.Value = Dereference(escapedValue, start);
} else {
text.Value = escapedValue;
}
text.Value = GetCachedString(text.Value);
EndInternalObject(frame, storeNewObject: this.CurrentLocation > start);
}
void MakeText(int start, int end)
{
Log.DebugAssert(end > start, "Empty text");
Log.DebugAssert(end == this.CurrentLocation, "end == current location");
InternalText text = new InternalText();
var frame = BeginInternalObject(text, start);
text.Type = TextType.Other;
text.Value = GetText(start, end);
EndInternalObject(frame);
}
internal AXmlText(AXmlObject parent, int startOffset, InternalText internalObject)
: base(parent, startOffset, internalObject)
{
}
bool ReadCurrentPosition()
{
attributes = null;
attributeIndex = -1;
inAttributeValue = false;
while (true)
{
var obj = objectIterator.CurrentObject;
if (obj == null)
{
readState = ReadState.EndOfFile;
elementNodeType = XmlNodeType.None;
return(false);
}
else if (objectIterator.IsAtElementEnd)
{
if (IsEmptyElement)
{
// Don't report EndElement for empty elements
nsManager.PopScope();
}
else
{
elementNodeType = XmlNodeType.EndElement;
return(true);
}
}
else if (obj is InternalElement)
{
// element start
elementNodeType = XmlNodeType.Element;
InternalTag startTag = ((InternalTag)obj.NestedObjects[0]);
nsManager.PushScope();
if (startTag.NestedObjects != null)
{
attributes = startTag.NestedObjects.OfType <InternalAttribute>().ToList();
for (int i = 0; i < attributes.Count; i++)
{
var attr = attributes[i];
if (attr.Name.StartsWith("xmlns:", StringComparison.Ordinal))
{
nsManager.AddNamespace(AXmlObject.GetLocalName(attr.Name), attr.Value);
}
else if (attr.Name == "xmlns")
{
nsManager.AddNamespace(string.Empty, attr.Value);
}
}
}
return(true);
}
else if (obj is InternalText)
{
InternalText text = (InternalText)obj;
if (text.ContainsOnlyWhitespace)
{
elementNodeType = XmlNodeType.Whitespace;
}
else
{
elementNodeType = XmlNodeType.Text;
}
return(true);
}
else if (obj is InternalTag)
{
InternalTag tag = (InternalTag)obj;
if (tag.IsStartOrEmptyTag || tag.IsEndTag)
{
// start/end tags can be skipped as the parent InternalElement already handles them
}
else if (tag.IsComment && !settings.IgnoreComments)
{
elementNodeType = XmlNodeType.Comment;
return(true);
}
else if (tag.IsProcessingInstruction && !settings.IgnoreProcessingInstructions)
{
if (tag.Name == "xml")
{
elementNodeType = XmlNodeType.XmlDeclaration;
attributes = tag.NestedObjects.OfType <InternalAttribute>().ToList();
}
else
{
elementNodeType = XmlNodeType.ProcessingInstruction;
}
return(true);
}
else if (tag.IsCData)
{
elementNodeType = XmlNodeType.CDATA;
return(true);
}
else
{
// TODO all other tags
}
}
else
{
throw new NotSupportedException();
}
objectIterator.MoveInto();
}
}
