AXmlObject ReadSingleObject(IEnumerator <AXmlObject> objStream)
{
AXmlObject obj = objStream.Current;
objStream.MoveNext();
return(obj);
}
void RemoveChildrenNotIn(IList <AXmlObject> srcList)
{
Dictionary <int, AXmlObject> srcChildren = srcList.ToDictionary(i => i.StartOffset);
for (int i = 0; i < this.Children.Count;)
{
AXmlObject child = this.Children[i];
AXmlObject srcChild;
if (srcChildren.TryGetValue(child.StartOffset, out srcChild) && child.CanUpdateDataFrom(srcChild))
{
// Keep only one item with given offset (we might have several due to deletion)
srcChildren.Remove(child.StartOffset);
// If contaner that needs updating
AXmlContainer childAsContainer = child as AXmlContainer;
if (childAsContainer != null && child.LastUpdatedFrom != srcChild)
{
childAsContainer.RemoveChildrenNotIn(((AXmlContainer)srcChild).Children);
}
i++;
}
else
{
RemoveChild(i);
}
}
}
AXmlObject ReadTextOrElement(IEnumerator <AXmlObject> objStream)
{
AXmlObject curr = objStream.Current;
if (curr is AXmlText || curr is AXmlElement)
{
return(ReadSingleObject(objStream));
}
else
{
AXmlTag currTag = (AXmlTag)curr;
if (currTag == StartTagPlaceholder)
{
return(ReadElement(objStream));
}
else if (currTag.IsStartOrEmptyTag)
{
return(ReadElement(objStream));
}
else
{
return(ReadSingleObject(objStream));
}
}
}
void InsertAndUpdateChildrenFrom(IList <AXmlObject> srcList)
{
for (int i = 0; i < srcList.Count; i++)
{
// End of our list?
if (i == this.Children.Count)
{
InsertChild(i, srcList[i]);
continue;
}
AXmlObject child = this.Children[i];
AXmlObject srcChild = srcList[i];
if (child.CanUpdateDataFrom(srcChild)) // includes offset test
// Does it need updating?
{
if (child.LastUpdatedFrom != srcChild)
{
child.UpdateDataFrom(srcChild);
AXmlContainer childAsContainer = child as AXmlContainer;
if (childAsContainer != null)
{
childAsContainer.InsertAndUpdateChildrenFrom(((AXmlContainer)srcChild).Children);
}
}
}
else
{
InsertChild(i, srcChild);
}
}
Assert(this.Children.Count == srcList.Count, "List lengths differ after update");
}
/// <summary> Is call to UpdateDataFrom is allowed? </summary>
internal bool CanUpdateDataFrom(AXmlObject source)
{
return
(this.GetType() == source.GetType() &&
this.StartOffset == source.StartOffset &&
(this.LastUpdatedFrom == source || !this.IsCached));
}
/// <inheritdoc/>
internal override bool UpdateDataFrom(AXmlObject source)
{
if (!base.UpdateDataFrom(source))
{
return(false);
}
AXmlElement src = (AXmlElement)source;
// Clear the cache for this - quite expensive
attributesAndElements = null;
if (this.IsProperlyNested != src.IsProperlyNested ||
this.HasStartOrEmptyTag != src.HasStartOrEmptyTag ||
this.HasEndTag != src.HasEndTag)
{
OnChanging();
this.IsProperlyNested = src.IsProperlyNested;
this.HasStartOrEmptyTag = src.HasStartOrEmptyTag;
this.HasEndTag = src.HasEndTag;
OnChanged();
return(true);
}
else
{
return(false);
}
}
/// <summary> Add object to cache, optionally adding extra memory tracking </summary>
public void AddParsedObject(AXmlObject obj, int?maxTouchedLocation)
{
if (!(obj.Length > 0 || obj is AXmlDocument))
{
AXmlParser.Assert(false, string.Format(CultureInfo.InvariantCulture, "Invalid object {0}. It has zero length.", obj));
}
// // Expensive check
// if (obj is AXmlContainer) {
// int objStartOffset = obj.StartOffset;
// int objEndOffset = obj.EndOffset;
// foreach(AXmlObject child in ((AXmlContainer)obj).Children) {
// AXmlParser.Assert(objStartOffset <= child.StartOffset && child.EndOffset <= objEndOffset, "Wrong nesting");
// }
// }
segments.Add(obj);
AddSyntaxErrorsOf(obj);
obj.IsCached = true;
if (maxTouchedLocation != null)
{
// location is assumed to be read so the range ends at (location + 1)
// For example eg for "a_" it is (0-2)
TouchedRange range = new TouchedRange()
{
StartOffset = obj.StartOffset,
EndOffset = maxTouchedLocation.Value + 1,
TouchedByObject = obj
};
segments.Add(range);
AXmlParser.Log("{0} touched range ({1}-{2})", obj, range.StartOffset, range.EndOffset);
}
}
public void AddSyntaxErrorsOf(AXmlObject obj)
{
foreach (SyntaxError syntaxError in obj.MySyntaxErrors)
{
segments.Add(syntaxError);
}
}
public void RemoveSyntaxErrorsOf(AXmlObject obj)
{
foreach (SyntaxError syntaxError in obj.MySyntaxErrors)
{
segments.Remove(syntaxError);
}
}
internal void OnObjectRemoved(int index, AXmlObject obj)
{
if (ObjectRemoved != null)
{
ObjectRemoved(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, new AXmlObject[] { obj }.ToList(), index));
}
}
/// <summary> Verify that the subtree is consistent. Only in debug build. </summary>
/// <remarks> Parent pointers might be null or pointing somewhere else in parse tree </remarks>
internal override void DebugCheckConsistency(bool checkParentPointers)
{
base.DebugCheckConsistency(checkParentPointers);
AXmlObject prevChild = null;
int myStartOffset = this.StartOffset;
int myEndOffset = this.EndOffset;
foreach (AXmlObject child in this.Children)
{
Assert(child.Length != 0, "Empty child");
if (checkParentPointers)
{
Assert(child.Parent != null, "Null parent reference");
Assert(child.Parent == this, "Inccorect parent reference");
}
if (this.Document != null)
{
Assert(child.Document != null, "Child has null document");
Assert(child.Document == this.Document, "Child is in different document");
}
if (this.IsCached)
{
Assert(child.IsCached, "Child not in cache");
}
Assert(myStartOffset <= child.StartOffset && child.EndOffset <= myEndOffset, "Child not within parent text range");
if (prevChild != null)
{
Assert(prevChild.EndOffset <= child.StartOffset, "Overlaping childs");
}
child.DebugCheckConsistency(checkParentPointers);
prevChild = child;
}
}
/// <inheritdoc/>
internal override bool UpdateDataFrom(AXmlObject source)
{
if (!base.UpdateDataFrom(source))
{
return(false);
}
AXmlAttribute src = (AXmlAttribute)source;
if (this.Name != src.Name ||
this.EqualsSign != src.EqualsSign ||
this.QuotedValue != src.QuotedValue ||
this.Value != src.Value)
{
OnChanging();
this.Name = src.Name;
this.EqualsSign = src.EqualsSign;
this.QuotedValue = src.QuotedValue;
this.Value = src.Value;
OnChanged();
return(true);
}
else
{
return(false);
}
}
int GetIndentLevel(AXmlObject obj)
{
int offset = obj.StartOffset - 1;
int level = 0;
while (true)
{
if (offset < 0)
{
break;
}
char c = input[offset];
if (c == ' ')
{
level++;
}
else if (c == '\t')
{
level += 4;
}
else if (c == '\r' || c == '\n')
{
break;
}
else
{
return(-1);
}
offset--;
}
return(level);
}
IEnumerable <AXmlObject> Split(AXmlElement elem)
{
int myIndention = GetIndentLevel(elem);
// Has start tag and no end tag ? (other then empty-element tag)
if (elem.HasStartOrEmptyTag && elem.StartTag.IsStartTag && !elem.HasEndTag && myIndention != -1)
{
int lastAccepted = 0; // Accept start tag
while (lastAccepted + 1 < elem.Children.Count)
{
AXmlObject nextItem = elem.Children[lastAccepted + 1];
if (nextItem is AXmlText)
{
lastAccepted++; continue; // Accept
}
else
{
// Include all more indented items
if (GetIndentLevel(nextItem) > myIndention)
{
lastAccepted++; continue; // Accept
}
else
{
break; // Reject
}
}
}
// Accepted everything?
if (lastAccepted + 1 == elem.Children.Count)
{
yield return(elem);
yield break;
}
AXmlParser.Log("Splitting {0} - take {1} of {2} nested", elem, lastAccepted, elem.Children.Count - 1);
AXmlElement topHalf = new AXmlElement();
topHalf.HasStartOrEmptyTag = elem.HasStartOrEmptyTag;
topHalf.HasEndTag = elem.HasEndTag;
topHalf.AddChildren(elem.Children.Take(1 + lastAccepted)); // Start tag + nested
topHalf.StartOffset = topHalf.FirstChild.StartOffset;
topHalf.EndOffset = topHalf.LastChild.EndOffset;
TagReader.OnSyntaxError(topHalf, topHalf.LastChild.EndOffset, topHalf.LastChild.EndOffset,
"Expected '</{0}>'", topHalf.StartTag.Name);
AXmlParser.Log("Constructed {0}", topHalf);
trackedSegments.AddParsedObject(topHalf, null);
yield return(topHalf);
for (int i = lastAccepted + 1; i < elem.Children.Count; i++)
{
yield return(elem.Children[i]);
}
}
else
{
yield return(elem);
}
}
// Only these four methods should be used to modify the collection
/// <summary> To be used exlucively by the parser </summary>
internal void AddChild(AXmlObject item)
{
// Childs can be only added to newly parsed items
Assert(this.Parent == null, "I have to be new");
Assert(item.IsCached, "Added item must be in cache");
// Do not set parent pointer
this.Children.InsertItemAt(this.Children.Count, item);
}
internal SyntaxError Clone(AXmlObject newOwner)
{
return new SyntaxError {
Object = newOwner,
Message = Message,
Tag = Tag,
StartOffset = StartOffset,
EndOffset = EndOffset,
};
}
internal void OnObjectChanged(AXmlObject obj)
{
if (ObjectChanged != null)
{
ObjectChanged(this, new AXmlObjectEventArgs()
{
Object = obj
});
}
}
internal SyntaxError Clone(AXmlObject newOwner)
{
return(new SyntaxError {
Object = newOwner,
Message = Message,
Tag = Tag,
StartOffset = StartOffset,
EndOffset = EndOffset,
});
}
public IEnumerable <AXmlObject> GetAncestors()
{
AXmlObject curr = this.Parent;
while (curr != null)
{
yield return(curr);
curr = curr.Parent;
}
}
/// <summary> Invalidates items, but keeps tracking them </summary>
/// <remarks> Can be called redundantly (from range tacking) </remarks>
void InvalidateCache(AXmlObject obj, bool includeParents)
{
if (includeParents)
{
foreach (AXmlObject parent in FindParents(obj))
{
parent.IsCached = false;
AXmlParser.Log("Invalidating cached item {0} (it is parent)", parent);
}
}
obj.IsCached = false;
AXmlParser.Log("Invalidating cached item {0}", obj);
}
/// <summary>
/// To be used exclusively by the children update algorithm.
/// Insert child and keep links consistent.
/// </summary>
void InsertChild(int index, AXmlObject item)
{
AXmlParser.Log("Inserting {0} at index {1}", item, index);
Assert(this.Document != null, "Can not insert to dangling object");
Assert(item.Parent != this, "Can not own item twice");
SetParentPointersInTree(item);
this.Children.InsertItemAt(index, item);
this.Document.OnObjectInserted(index, item);
}
IEnumerable <AXmlObject> FindParents(AXmlObject child)
{
int childStartOffset = child.StartOffset;
int childEndOffset = child.EndOffset;
foreach (AXmlObject parent in segments.FindSegmentsContaining(child.StartOffset).OfType <AXmlObject>())
{
// Parent is anyone wholy containg the child
if (parent.StartOffset <= childStartOffset && childEndOffset <= parent.EndOffset && parent != child)
{
yield return(parent);
}
}
}
public static void OnSyntaxError(AXmlObject obj, int start, int end, string message, params object[] args)
{
if (end <= start)
{
end = start + 1;
}
AXmlParser.Log("Syntax error ({0}-{1}): {2}", start, end, string.Format(message, args));
obj.AddSyntaxError(new SyntaxError()
{
Object = obj,
StartOffset = start,
EndOffset = end,
Message = string.Format(message, args),
});
}
/// <inheritdoc/>
internal override bool UpdateDataFrom(AXmlObject source)
{
if (!base.UpdateDataFrom(source)) return false;
AXmlText src = (AXmlText)source;
if (this.EscapedValue != src.EscapedValue ||
this.Value != src.Value)
{
OnChanging();
this.EscapedValue = src.EscapedValue;
this.Value = src.Value;
OnChanged();
return true;
} else {
return false;
}
}
public static void OnSyntaxError(AXmlObject obj, int start, int end, string message, params object[] args)
{
if (end <= start)
{
end = start + 1;
}
string formattedMessage = string.Format(CultureInfo.InvariantCulture, message, args);
AXmlParser.Log("Syntax error ({0}-{1}): {2}", start, end, formattedMessage);
obj.AddSyntaxError(new SyntaxError()
{
Object = obj,
StartOffset = start,
EndOffset = end,
Message = formattedMessage,
});
}
/// <summary> Copy all data from the 'source' to this object </summary>
/// <remarks> Returns true if any updates were done </remarks>
internal virtual bool UpdateDataFrom(AXmlObject source)
{
Assert(this.GetType() == source.GetType(), "Source has different type");
DebugAssert(this.StartOffset == source.StartOffset, "Source has different StartOffset");
if (this.LastUpdatedFrom == source)
{
DebugAssert(this.EndOffset == source.EndOffset, "Source has different EndOffset");
return(false);
}
Assert(!this.IsCached, "Can not update cached item");
Assert(source.IsCached, "Must update from cache");
this.LastUpdatedFrom = source;
this.StartOffset = source.StartOffset;
// In some cases we are just updating objects of that same
// type and position and hoping to be luckily right
this.EndOffset = source.EndOffset;
// Do not bother comparing - assume changed if non-null
if (this.syntaxErrors != null || source.syntaxErrors != null)
{
// May be called again in derived class - oh, well, does not matter
OnChanging();
this.Document.Parser.TrackedSegments.RemoveSyntaxErrorsOf(this);
if (source.syntaxErrors == null)
{
this.syntaxErrors = null;
}
else
{
this.syntaxErrors = new List <SyntaxError>();
foreach (var error in source.MySyntaxErrors)
{
// The object differs, so create our own copy
// The source still might need it in the future and we do not want to break it
this.AddSyntaxError(error.Clone(this));
}
}
this.Document.Parser.TrackedSegments.AddSyntaxErrorsOf(this);
OnChanged();
}
return(true);
}
/// <inheritdoc/>
internal override bool UpdateDataFrom(AXmlObject source)
{
if (!base.UpdateDataFrom(source)) return false;
AXmlTag src = (AXmlTag)source;
if (this.OpeningBracket != src.OpeningBracket ||
this.Name != src.Name ||
this.ClosingBracket != src.ClosingBracket)
{
OnChanging();
this.OpeningBracket = src.OpeningBracket;
this.Name = src.Name;
this.ClosingBracket = src.ClosingBracket;
OnChanged();
return true;
} else {
return false;
}
}
/// <summary> Removes object with all of its non-cached children </summary>
public void RemoveParsedObject(AXmlObject obj)
{
// Cached objects may be used in the future - do not remove them
if (obj.IsCached)
{
return;
}
segments.Remove(obj);
RemoveSyntaxErrorsOf(obj);
AXmlParser.Log("Stopped tracking {0}", obj);
if (obj is AXmlContainer)
{
foreach (AXmlObject child in ((AXmlContainer)obj).Children)
{
RemoveParsedObject(child);
}
}
}
/// <summary>
/// To be used exclusively by the children update algorithm.
/// Remove child, set parent to null and notify the document
/// </summary>
void RemoveChild(int index)
{
AXmlObject removed = this.Children[index];
AXmlParser.Log("Removing {0} at index {1}", removed, index);
// Stop tracking if the object can not be used again
if (!removed.IsCached)
{
this.Document.Parser.TrackedSegments.RemoveParsedObject(removed);
}
// Null parent pointer
Assert(removed.Parent == this, "Inconsistent child");
removed.Parent = null;
this.Children.RemoveItemAt(index);
this.Document.OnObjectRemoved(index, removed);
}
/// <inheritdoc/>
internal override bool UpdateDataFrom(AXmlObject source)
{
if (!base.UpdateDataFrom(source)) return false;
AXmlElement src = (AXmlElement)source;
// Clear the cache for this - quite expensive
attributesAndElements = null;
if (this.IsProperlyNested != src.IsProperlyNested ||
this.HasStartOrEmptyTag != src.HasStartOrEmptyTag ||
this.HasEndTag != src.HasEndTag)
{
OnChanging();
this.IsProperlyNested = src.IsProperlyNested;
this.HasStartOrEmptyTag = src.HasStartOrEmptyTag;
this.HasEndTag = src.HasEndTag;
OnChanged();
return true;
} else {
return false;
}
}
/// <summary> Recursively fix all parent pointer in a tree </summary>
/// <remarks>
/// Cache constraint:
/// If cached item has parent set, then the whole subtree must be consistent and document set
/// </remarks>
void SetParentPointersInTree(AXmlObject item)
{
// All items come from the parser cache
if (item.Parent == null)
{
// Dangling object - either a new parser object or removed tree (still cached)
item.Parent = this;
item.Document = this.Document;
AXmlContainer container = item as AXmlContainer;
if (container != null)
{
foreach (AXmlObject child in container.Children)
{
container.SetParentPointersInTree(child);
}
}
}
else if (item.Parent == this)
{
// If node is attached and then deattached, it will have null parent pointer
// but valid subtree - so its children will alredy have correct parent pointer
// like in this case
// item.DebugCheckConsistency(false);
// Rest of the tree is consistent - do not recurse
}
else
{
// From cache & parent set => consitent subtree
// item.DebugCheckConsistency(false);
// The parent (or any futher parents) can not be part of parsed document
// becuase otherwise this item would be included twice => safe to change parents
// Maintain cache constraint by setting parents to null
foreach (AXmlObject ancest in item.GetAncestors().ToList())
{
ancest.Parent = null;
}
item.Parent = this;
// Rest of the tree is consistent - do not recurse
}
}
/// <inheritdoc/>
internal override bool UpdateDataFrom(AXmlObject source)
{
if (!base.UpdateDataFrom(source))
{
return(false);
}
AXmlText src = (AXmlText)source;
if (this.EscapedValue != src.EscapedValue ||
this.Value != src.Value)
{
OnChanging();
this.EscapedValue = src.EscapedValue;
this.Value = src.Value;
OnChanged();
return(true);
}
else
{
return(false);
}
}
/// <inheritdoc/>
internal override bool UpdateDataFrom(AXmlObject source)
{
if (!base.UpdateDataFrom(source))
{
return(false);
}
AXmlTag src = (AXmlTag)source;
if (this.OpeningBracket != src.OpeningBracket ||
this.Name != src.Name ||
this.ClosingBracket != src.ClosingBracket)
{
OnChanging();
this.OpeningBracket = src.OpeningBracket;
this.Name = src.Name;
this.ClosingBracket = src.ClosingBracket;
OnChanged();
return(true);
}
else
{
return(false);
}
}
string Dereference(AXmlObject owner, string text, int textLocation)
{
StringBuilder sb = null; // The dereferenced text so far (all up to 'curr')
int curr = 0;
while (true)
{
// Reached end of input
if (curr == text.Length)
{
if (sb != null)
{
return(sb.ToString());
}
else
{
return(text);
}
}
// Try to find reference
int start = text.IndexOf('&', curr);
// No more references found
if (start == -1)
{
if (sb != null)
{
sb.Append(text, curr, text.Length - curr); // Add rest
return(sb.ToString());
}
else
{
return(text);
}
}
// Append text before the enitiy reference
if (sb == null)
{
sb = new StringBuilder(text.Length);
}
sb.Append(text, curr, start - curr);
curr = start;
// Process the entity
int errorLoc = textLocation + sb.Length;
// Find entity name
int end = text.IndexOfAny(new char[] { '&', ';' }, start + 1, Math.Min(maxEntityLength, text.Length - (start + 1)));
if (end == -1 || text[end] == '&')
{
// Not found
OnSyntaxError(owner, errorLoc, errorLoc + 1, "Entity reference must be terminated with ';'");
// Keep '&'
sb.Append('&');
curr++;
continue; // Restart and next character location
}
string name = text.Substring(start + 1, end - (start + 1));
// Resolve the name
string replacement;
if (name.Length == 0)
{
replacement = null;
OnSyntaxError(owner, errorLoc + 1, errorLoc + 1, "Entity name expected");
}
else if (name == "amp")
{
replacement = "&";
}
else if (name == "lt")
{
replacement = "<";
}
else if (name == "gt")
{
replacement = ">";
}
else if (name == "apos")
{
replacement = "'";
}
else if (name == "quot")
{
replacement = "\"";
}
else if (name.Length > 0 && name[0] == '#')
{
int num;
if (name.Length > 1 && name[1] == 'x')
{
if (!int.TryParse(name.Substring(2), NumberStyles.AllowHexSpecifier, CultureInfo.InvariantCulture.NumberFormat, out num))
{
num = -1;
OnSyntaxError(owner, errorLoc + 3, errorLoc + 1 + name.Length, "Hexadecimal code of unicode character expected");
}
}
else
{
if (!int.TryParse(name.Substring(1), NumberStyles.None, CultureInfo.InvariantCulture.NumberFormat, out num))
{
num = -1;
OnSyntaxError(owner, errorLoc + 2, errorLoc + 1 + name.Length, "Numeric code of unicode character expected");
}
}
if (num != -1)
{
try {
replacement = char.ConvertFromUtf32(num);
} catch (ArgumentOutOfRangeException) {
replacement = null;
OnSyntaxError(owner, errorLoc + 2, errorLoc + 1 + name.Length, "Invalid unicode character U+{0:X} ({0})", num);
}
}
else
{
replacement = null;
}
}
else if (!IsValidName(name))
{
replacement = null;
OnSyntaxError(owner, errorLoc + 1, errorLoc + 1, "Invalid entity name");
}
else
{
replacement = null;
if (parser.UnknownEntityReferenceIsError)
{
OnSyntaxError(owner, errorLoc, errorLoc + 1 + name.Length + 1, "Unknown entity reference '{0}'", name);
}
}
// Append the replacement to output
if (replacement != null)
{
sb.Append(replacement);
}
else
{
sb.Append('&');
sb.Append(name);
sb.Append(';');
}
curr = end + 1;
continue;
}
}
/// <summary> Is call to UpdateDataFrom is allowed? </summary>
internal bool CanUpdateDataFrom(AXmlObject source)
{
return
this.GetType() == source.GetType() &&
this.StartOffset == source.StartOffset &&
(this.LastUpdatedFrom == source || !this.IsCached);
}
// Only these four methods should be used to modify the collection
/// <summary> To be used exlucively by the parser </summary>
internal void AddChild(AXmlObject item)
{
// Childs can be only added to newly parsed items
Assert(this.Parent == null, "I have to be new");
Assert(item.IsCached, "Added item must be in cache");
// Do not set parent pointer
this.Children.InsertItemAt(this.Children.Count, item);
}
/// <summary> Recursively fix all parent pointer in a tree </summary>
/// <remarks>
/// Cache constraint:
/// If cached item has parent set, then the whole subtree must be consistent and document set
/// </remarks>
void SetParentPointersInTree(AXmlObject item)
{
// All items come from the parser cache
if (item.Parent == null) {
// Dangling object - either a new parser object or removed tree (still cached)
item.Parent = this;
item.Document = this.Document;
if (item is AXmlContainer) {
foreach(AXmlObject child in ((AXmlContainer)item).Children) {
((AXmlContainer)item).SetParentPointersInTree(child);
}
}
} else if (item.Parent == this) {
// If node is attached and then deattached, it will have null parent pointer
// but valid subtree - so its children will alredy have correct parent pointer
// like in this case
// item.DebugCheckConsistency(false);
// Rest of the tree is consistent - do not recurse
} else {
// From cache & parent set => consitent subtree
// item.DebugCheckConsistency(false);
// The parent (or any futher parents) can not be part of parsed document
// becuase otherwise this item would be included twice => safe to change parents
// Maintain cache constraint by setting parents to null
foreach(AXmlObject ancest in item.GetAncestors().ToList()) {
ancest.Parent = null;
}
item.Parent = this;
// Rest of the tree is consistent - do not recurse
}
}
/// <summary>
/// To be used exclusively by the children update algorithm.
/// Insert child and keep links consistent.
/// </summary>
void InsertChild(int index, AXmlObject item)
{
AXmlParser.Log("Inserting {0} at index {1}", item, index);
Assert(this.Document != null, "Can not insert to dangling object");
Assert(item.Parent != this, "Can not own item twice");
SetParentPointersInTree(item);
this.Children.InsertItemAt(index, item);
this.Document.OnObjectInserted(index, item);
}
/// <summary> Copy all data from the 'source' to this object </summary>
/// <remarks> Returns true if any updates were done </remarks>
internal virtual bool UpdateDataFrom(AXmlObject source)
{
Assert(this.GetType() == source.GetType(), "Source has different type");
DebugAssert(this.StartOffset == source.StartOffset, "Source has different StartOffset");
if (this.LastUpdatedFrom == source) {
DebugAssert(this.EndOffset == source.EndOffset, "Source has different EndOffset");
return false;
}
Assert(!this.IsCached, "Can not update cached item");
Assert(source.IsCached, "Must update from cache");
this.LastUpdatedFrom = source;
this.StartOffset = source.StartOffset;
// In some cases we are just updating objects of that same
// type and position and hoping to be luckily right
this.EndOffset = source.EndOffset;
// Do not bother comparing - assume changed if non-null
if (this.syntaxErrors != null || source.syntaxErrors != null) {
// May be called again in derived class - oh, well, does not matter
OnChanging();
this.Document.Parser.TrackedSegments.RemoveSyntaxErrorsOf(this);
if (source.syntaxErrors == null) {
this.syntaxErrors = null;
} else {
this.syntaxErrors = new List<SyntaxError>();
foreach(var error in source.MySyntaxErrors) {
// The object differs, so create our own copy
// The source still might need it in the future and we do not want to break it
this.AddSyntaxError(error.Clone(this));
}
}
this.Document.Parser.TrackedSegments.AddSyntaxErrorsOf(this);
OnChanged();
}
return true;
}
internal void OnObjectRemoved(int index, AXmlObject obj)
{
if (ObjectRemoved != null)
ObjectRemoved(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, new AXmlObject[] { obj }.ToList(), index));
}
/// <inheritdoc/>
internal override bool UpdateDataFrom(AXmlObject source)
{
if (!base.UpdateDataFrom(source)) return false;
AXmlAttribute src = (AXmlAttribute)source;
if (this.Name != src.Name ||
this.EqualsSign != src.EqualsSign ||
this.QuotedValue != src.QuotedValue ||
this.Value != src.Value)
{
OnChanging();
this.Name = src.Name;
this.EqualsSign = src.EqualsSign;
this.QuotedValue = src.QuotedValue;
this.Value = src.Value;
OnChanged();
return true;
} else {
return false;
}
}
internal void OnObjectChanged(AXmlObject obj)
{
if (ObjectChanged != null)
ObjectChanged(this, new AXmlObjectEventArgs() { Object = obj } );
}