public ObjectIterator(InternalObject[] objects, int startPosition = 0)
{
this.currentPosition = startPosition;
this.objects = objects;
if (objects.Length > 0)
this.currentObject = objects[0];
}
public void MoveNext()
{
if (currentObject == null)
{
return;
}
currentIndex++;
currentPosition += currentObject.Length;
isAtElementEnd = false;
while (currentIndex >= objects.Length && listStack.Count > 0)
{
objects = listStack.Pop();
currentIndex = indexStack.Pop();
if (this.StopAtElementEnd)
{
isAtElementEnd = true;
break;
}
else
{
currentIndex++;
}
}
currentObject = (currentIndex < objects.Length ? objects[currentIndex] : null);
}
public InternalObject SetStartRelativeToParent(int newStartRelativeToParent)
{
if (newStartRelativeToParent == StartRelativeToParent)
return this;
InternalObject obj = (InternalObject)MemberwiseClone();
obj.StartRelativeToParent = newStartRelativeToParent;
return obj;
}
InternalObjectFrame BeginInternalObject(InternalObject internalObject, int beginLocation)
{
internalObject.StartRelativeToParent = beginLocation - internalObjectStartPosition;
var frame = new InternalObjectFrame(internalObject, internalObjectStartPosition);
internalObjectStartPosition = CurrentLocation;
return(frame);
}
public ObjectIterator(InternalObject[] objects, int startPosition = 0)
{
this.currentPosition = startPosition;
this.objects = objects;
if (objects.Length > 0)
{
this.currentObject = objects[0];
}
}
public void MoveInto()
{
if (isAtElementEnd || !(currentObject is InternalElement))
{
MoveNext();
}
else
{
listStack.Push(objects);
indexStack.Push(currentIndex);
objects = currentObject.NestedObjects;
currentIndex = 0;
currentObject = objects[0];
}
}
public void MoveNext()
{
if (currentObject == null)
return;
currentIndex++;
currentPosition += currentObject.Length;
isAtElementEnd = false;
while (currentIndex >= objects.Length && listStack.Count > 0) {
objects = listStack.Pop();
currentIndex = indexStack.Pop();
if (this.StopAtElementEnd) {
isAtElementEnd = true;
break;
} else {
currentIndex++;
}
}
currentObject = (currentIndex < objects.Length ? objects[currentIndex] : null);
}
public List<InternalObject> ReadAllObjectsIncremental(InternalObject[] oldObjects, List<UnchangedSegment> reuseMap, CancellationToken cancellationToken)
{
ObjectIterator oldObjectIterator = new ObjectIterator(oldObjects);
int reuseMapIndex = 0;
while (reuseMapIndex < reuseMap.Count) {
var reuseEntry = reuseMap[reuseMapIndex];
while (this.CurrentLocation < reuseEntry.NewOffset) {
cancellationToken.ThrowIfCancellationRequested();
ReadObject();
}
if (this.CurrentLocation >= reuseEntry.NewOffset + reuseEntry.Length) {
reuseMapIndex++;
continue;
}
Debug.Assert(reuseEntry.NewOffset <= this.CurrentLocation && this.CurrentLocation < reuseEntry.NewOffset + reuseEntry.Length);
// reuse the nodes within this reuseEntry starting at oldOffset:
int oldOffset = this.CurrentLocation - reuseEntry.NewOffset + reuseEntry.OldOffset;
// seek to oldOffset in the oldObjects array:
oldObjectIterator.SkipTo(oldOffset);
if (oldObjectIterator.CurrentPosition == oldOffset) {
// reuse old objects within this reuse entry:
int reuseEnd = reuseEntry.OldOffset + reuseEntry.Length;
while (oldObjectIterator.CurrentObject != null && oldObjectIterator.CurrentPosition + oldObjectIterator.CurrentObject.LengthTouched < reuseEnd) {
StoreObject(oldObjectIterator.CurrentObject);
Skip(oldObjectIterator.CurrentObject.Length);
oldObjectIterator.MoveNext();
}
reuseMapIndex++; // go to next re-use map
} else {
// We are in a region where old objects are available, but aren't aligned correctly.
// Don't skip this reuse entry, and read a single object so that we can re-align
ReadObject();
}
}
while (HasMoreData()) {
cancellationToken.ThrowIfCancellationRequested();
ReadObject();
}
return objects;
}
void ProcessObject(InternalObject obj, int indentationLevel, ConfigurationList oldConfigurations, ref ConfigurationList newConfigurations)
{
newConfigurations.Clear();
InternalTag tag = obj as InternalTag;
for (int i = 0; i < oldConfigurations.count; i++)
{
Configuration c = oldConfigurations.configurations[i];
if (c.Cost == InfiniteCost)
{
continue;
}
if (tag != null && tag.IsStartTag)
{
// Push start tag
newConfigurations.Add(
c.OpenTags.Push(tag.Name, indentationLevel),
c.Document.Push(obj),
c.Cost
);
}
else if (tag != null && tag.IsEndTag)
{
// We can ignore this end tag
newConfigurations.Add(
c.OpenTags,
c.Document.Push(StartTagPlaceholder).Push(obj),
c.Cost + IgnoreEndTagCost
);
// We can match this end tag with one of the currently open tags
var openTags = c.OpenTags;
var documentWithInsertedEndTags = c.Document;
uint newCost = c.Cost;
while (!openTags.IsEmpty)
{
uint matchCost = 0;
if (openTags.IndentationLevel >= 0 && indentationLevel >= 0)
{
matchCost += (uint)Math.Abs(openTags.IndentationLevel - indentationLevel);
}
if (openTags.Name != tag.Name)
{
matchCost += MismatchedNameCost;
}
newConfigurations.Add(
openTags.Pop(),
documentWithInsertedEndTags.Push(obj),
newCost + matchCost
);
newCost += MissingEndTagCost;
openTags = openTags.Pop();
documentWithInsertedEndTags = documentWithInsertedEndTags.Push(EndTagPlaceholder);
}
}
else
{
newConfigurations.Add(
c.OpenTags,
c.Document.Push(obj),
c.Cost
);
}
}
}
InternalObjectFrame BeginInternalObject(InternalObject internalObject)
{
return(BeginInternalObject(internalObject, this.CurrentLocation));
}
public void MoveInto()
{
if (isAtElementEnd || !(currentObject is InternalElement)) {
MoveNext();
} else {
listStack.Push(objects);
indexStack.Push(currentIndex);
objects = currentObject.NestedObjects;
currentIndex = 0;
currentObject = objects[0];
}
}
void StoreObject(InternalObject obj)
{
objects.Add(obj);
// Now combine properly-nested elements:
if (elementNameStack == null)
{
return; // parsing tag soup
}
InternalTag tag = obj as InternalTag;
if (tag == null)
{
return;
}
if (tag.IsEmptyTag)
{
// the tag is its own element
objects[objects.Count - 1] = new InternalElement(tag)
{
Length = tag.Length,
LengthTouched = tag.LengthTouched,
IsPropertyNested = true,
StartRelativeToParent = tag.StartRelativeToParent,
NestedObjects = new [] { tag.SetStartRelativeToParent(0) }
};
}
else if (tag.IsStartTag)
{
elementNameStack.Push(tag.Name);
}
else if (tag.IsEndTag && elementNameStack.Count > 0)
{
// Now look for the start element:
int startIndex = objects.Count - 2;
bool ok = false;
string expectedName = elementNameStack.Pop();
if (tag.Name == expectedName)
{
while (startIndex > 0)
{
var startTag = objects[startIndex] as InternalTag;
if (startTag != null)
{
if (startTag.IsStartTag)
{
ok = (startTag.Name == expectedName);
break;
}
else if (startTag.IsEndTag)
{
break;
}
}
startIndex--;
}
}
if (ok)
{
// We found a correct nesting, let's create an element:
InternalObject[] nestedObjects = new InternalObject[objects.Count - startIndex];
int oldStartRelativeToParent = objects[startIndex].StartRelativeToParent;
int pos = 0;
int maxLengthTouched = 0;
for (int i = 0; i < nestedObjects.Length; i++)
{
nestedObjects[i] = objects[startIndex + i].SetStartRelativeToParent(pos);
maxLengthTouched = Math.Max(maxLengthTouched, pos + nestedObjects[i].LengthTouched);
pos += nestedObjects[i].Length;
}
objects.RemoveRange(startIndex, nestedObjects.Length);
objects.Add(
new InternalElement((InternalTag)nestedObjects[0])
{
HasEndTag = true,
IsPropertyNested = true,
Length = pos,
LengthTouched = maxLengthTouched,
StartRelativeToParent = oldStartRelativeToParent,
NestedObjects = nestedObjects
});
}
else
{
// Mismatched name - the nesting isn't properly;
// clear the whole stack so that none of the currently open elements are closed as properly-nested.
elementNameStack.Clear();
}
}
}
public InternalObjectFrame(InternalObject internalObject, int parentStartPosition)
{
this.InternalObject = internalObject;
this.ParentStartPosition = parentStartPosition;
}
internal AXmlObject(AXmlObject parent, int startOffset, InternalObject internalObject)
{
this.parent = parent;
this.startOffset = startOffset;
this.internalObject = internalObject;
}
internal IncrementalParserState(int textLength, ITextSourceVersion version, InternalObject[] objects)
{
this.TextLength = textLength;
this.Version = version;
this.Objects = objects;
}
void ProcessObject(InternalObject obj, int indentationLevel, ConfigurationList oldConfigurations, ref ConfigurationList newConfigurations)
{
newConfigurations.Clear();
InternalTag tag = obj as InternalTag;
for (int i = 0; i < oldConfigurations.count; i++) {
Configuration c = oldConfigurations.configurations[i];
if (c.Cost == InfiniteCost)
continue;
if (tag != null && tag.IsStartTag) {
// Push start tag
newConfigurations.Add(
c.OpenTags.Push(tag.Name, indentationLevel),
c.Document.Push(obj),
c.Cost
);
} else if (tag != null && tag.IsEndTag) {
// We can ignore this end tag
newConfigurations.Add(
c.OpenTags,
c.Document.Push(StartTagPlaceholder).Push(obj),
c.Cost + IgnoreEndTagCost
);
// We can match this end tag with one of the currently open tags
var openTags = c.OpenTags;
var documentWithInsertedEndTags = c.Document;
uint newCost = c.Cost;
while (!openTags.IsEmpty) {
uint matchCost = 0;
if (openTags.IndentationLevel >= 0 && indentationLevel >= 0)
matchCost += (uint)Math.Abs(openTags.IndentationLevel - indentationLevel);
if (openTags.Name != tag.Name)
matchCost += MismatchedNameCost;
newConfigurations.Add(
openTags.Pop(),
documentWithInsertedEndTags.Push(obj),
newCost + matchCost
);
newCost += MissingEndTagCost;
openTags = openTags.Pop();
documentWithInsertedEndTags = documentWithInsertedEndTags.Push(EndTagPlaceholder);
}
} else {
newConfigurations.Add(
c.OpenTags,
c.Document.Push(obj),
c.Cost
);
}
}
}
public InternalObjectFrame(InternalObject internalObject, int parentStartPosition)
{
this.InternalObject = internalObject;
this.ParentStartPosition = parentStartPosition;
}
internal AXmlReader(InternalObject[] objects, int startPosition = 0, Func<int, TextLocation> offsetToTextLocation = null)
{
this.offsetToTextLocation = offsetToTextLocation;
objectIterator = new ObjectIterator(objects, startPosition);
objectIterator.StopAtElementEnd = true;
}
InternalObjectFrame BeginInternalObject(InternalObject internalObject, int beginLocation)
{
internalObject.StartRelativeToParent = beginLocation - internalObjectStartPosition;
var frame = new InternalObjectFrame(internalObject, internalObjectStartPosition);
internalObjectStartPosition = CurrentLocation;
return frame;
}
InternalObjectFrame BeginInternalObject(InternalObject internalObject)
{
return BeginInternalObject(internalObject, this.CurrentLocation);
}
internal AXmlObject(AXmlObject parent, int startOffset, InternalObject internalObject)
{
this.parent = parent;
this.startOffset = startOffset;
this.internalObject = internalObject;
}
void StoreObject(InternalObject obj)
{
objects.Add(obj);
// Now combine properly-nested elements:
if (elementNameStack == null)
return; // parsing tag soup
InternalTag tag = obj as InternalTag;
if (tag == null)
return;
if (tag.IsEmptyTag) {
// the tag is its own element
objects[objects.Count - 1] = new InternalElement(tag) {
Length = tag.Length,
LengthTouched = tag.LengthTouched,
IsPropertyNested = true,
StartRelativeToParent = tag.StartRelativeToParent,
NestedObjects = new [] { tag.SetStartRelativeToParent(0) }
};
} else if (tag.IsStartTag) {
elementNameStack.Push(tag.Name);
} else if (tag.IsEndTag && elementNameStack.Count > 0) {
// Now look for the start element:
int startIndex = objects.Count - 2;
bool ok = false;
string expectedName = elementNameStack.Pop();
if (tag.Name == expectedName) {
while (startIndex > 0) {
var startTag = objects[startIndex] as InternalTag;
if (startTag != null) {
if (startTag.IsStartTag) {
ok = (startTag.Name == expectedName);
break;
} else if (startTag.IsEndTag) {
break;
}
}
startIndex--;
}
}
if (ok) {
// We found a correct nesting, let's create an element:
InternalObject[] nestedObjects = new InternalObject[objects.Count - startIndex];
int oldStartRelativeToParent = objects[startIndex].StartRelativeToParent;
int pos = 0;
int maxLengthTouched = 0;
for (int i = 0; i < nestedObjects.Length; i++) {
nestedObjects[i] = objects[startIndex + i].SetStartRelativeToParent(pos);
maxLengthTouched = Math.Max(maxLengthTouched, pos + nestedObjects[i].LengthTouched);
pos += nestedObjects[i].Length;
}
objects.RemoveRange(startIndex, nestedObjects.Length);
objects.Add(
new InternalElement((InternalTag)nestedObjects[0]) {
HasEndTag = true,
IsPropertyNested = true,
Length = pos,
LengthTouched = maxLengthTouched,
StartRelativeToParent = oldStartRelativeToParent,
NestedObjects = nestedObjects
});
} else {
// Mismatched name - the nesting isn't properly;
// clear the whole stack so that none of the currently open elements are closed as properly-nested.
elementNameStack.Clear();
}
}
}
