public override void Save(Stream w)
{
XmlWriter xmlWriter = null;
try {
if (PreserveWhitespace)
{
XmlFormatter.Format(this);
xmlWriter = new XmlAttributePreservingWriter(w, TextEncoding);
}
else
{
XmlTextWriter textWriter = new XmlTextWriter(w, TextEncoding);
textWriter.Formatting = Formatting.Indented;
xmlWriter = textWriter;
}
WriteTo(xmlWriter);
}
finally {
if (xmlWriter != null)
{
xmlWriter.Flush();
}
}
}
public string GetAttributeNewLineString(XmlFormatter formatter)
{
if (attributeNewLineString == null)
{
attributeNewLineString = ComputeAttributeNewLineString(formatter);
}
return(attributeNewLineString);
}
public static void Format(XmlDocument document)
{
XmlFileInfoDocument errorInfoDocument = document as XmlFileInfoDocument;
if (errorInfoDocument != null)
{
XmlFormatter formatter = new XmlFormatter(errorInfoDocument);
formatter.FormatLoop(errorInfoDocument);
}
}
private string ComputeAttributeNewLineString(XmlFormatter formatter)
{
string lookAheadString = LookAheadForNewLineString();
if (lookAheadString != null)
{
return(lookAheadString);
}
else if (formatter != null)
{
return(formatter.CurrentAttributeIndent);
}
else
{
return(null);
}
}
private void EnsureAttributeNewLineString(XmlFormatter formatter)
{
GetAttributeNewLineString(formatter);
}
internal void UpdatePreservationInfo(XmlAttributeCollection updatedAttributes, XmlFormatter formatter)
{
if (updatedAttributes.Count == 0)
{
if (orderedAttributes.Count > 0)
{
// All attributes were removed, clear preservation info
leadingSpaces.Clear();
orderedAttributes.Clear();
}
}
else
{
Dictionary <string, bool> attributeExists = new Dictionary <string, bool>();
// Prepopulate the list with attributes that existed before
foreach (string attributeName in orderedAttributes)
{
attributeExists[attributeName] = false;
}
// Update the list with attributes that exist now
foreach (XmlAttribute attribute in updatedAttributes)
{
if (!attributeExists.ContainsKey(attribute.Name))
{
orderedAttributes.Add(attribute.Name);
}
attributeExists[attribute.Name] = true;
}
bool firstAttribute = true;
string keepLeadingWhitespace = null;
foreach (string key in orderedAttributes)
{
bool exists = attributeExists[key];
// Handle removal
if (!exists)
{
// We need to figure out whether to keep the leading
// or trailing whitespace. The logic is:
// 1. The whitespace before the first attribute is
// always kept, so remove trailing space.
// 2. We want to keep newlines, so if the leading
// space contains a newline then remove trailing
// space. If multiple newlines are being removed,
// keep the last one.
// 3. Otherwise, remove leading space.
//
// In order to remove trailing space, we have to
// remove the leading space of the next attribute, so
// we store this leading space to replace the next.
if (leadingSpaces.ContainsKey(key))
{
string leadingSpace = leadingSpaces[key];
if (firstAttribute)
{
if (keepLeadingWhitespace == null)
{
keepLeadingWhitespace = leadingSpace;
}
}
else if (ContainsNewLine(leadingSpace))
{
keepLeadingWhitespace = leadingSpace;
}
leadingSpaces.Remove(key);
}
}
else if (keepLeadingWhitespace != null)
{
// Exception to rule #2 above: Don't replace an existing
// newline with one that was removed
if (firstAttribute || !leadingSpaces.ContainsKey(key) || !ContainsNewLine(leadingSpaces[key]))
{
leadingSpaces[key] = keepLeadingWhitespace;
}
keepLeadingWhitespace = null;
}
// Handle addition
else if (!leadingSpaces.ContainsKey(key))
{
if (firstAttribute)
{
// This will prevent the textwriter from writing a
// newline before the first attribute
leadingSpaces[key] = " ";
}
else if (OneAttributePerLine)
{
// Add the indent space between each attribute
leadingSpaces[key] = GetAttributeNewLineString(formatter);
}
else
{
// Don't add any hard-coded spaces. All new attributes
// should be at the end, so they'll be formatted while
// writing. Make sure we have the right indent string,
// though.
EnsureAttributeNewLineString(formatter);
}
}
// firstAttribute remains true until we find the first
// attribute that actually exists
firstAttribute = firstAttribute && !exists;
}
}
}
void IXmlFormattableAttributes.FormatAttributes(XmlFormatter formatter)
{
preservationDict.UpdatePreservationInfo(Attributes, formatter);
}