public static TextFormatInfo GetTextFormatInfo (string file)
{
var info = new TextFormatInfo ();
string newLine = null;
ByteOrderMark bom;
using (FileStream fs = File.OpenRead (file)) {
byte[] buf = new byte [1024];
int nread, i;
if ((nread = fs.Read (buf, 0, buf.Length)) <= 0)
return info;
if (ByteOrderMark.TryParse (buf, nread, out bom))
i = bom.Length;
else
i = 0;
do {
// Read to the first newline to figure out which line endings this file is using
while (i < nread) {
if (buf[i] == '\r') {
newLine = "\r\n";
break;
} else if (buf[i] == '\n') {
newLine = "\n";
break;
}
i++;
}
if (newLine == null) {
if ((nread = fs.Read (buf, 0, buf.Length)) <= 0) {
newLine = "\n";
break;
}
i = 0;
}
} while (newLine == null);
// Check for a blank line at the end
info.EndsWithEmptyLine = fs.Seek (-1, SeekOrigin.End) > 0 && fs.ReadByte () == (int) '\n';
info.NewLine = newLine;
info.ByteOrderMark = bom;
return info;
}
}
public static void FormatElement (TextFormatInfo format, XmlElement elem)
{
// Remove duplicate namespace declarations
var nsa = elem.Attributes ["xmlns"];
if (nsa != null && nsa.Value == MSBuildProject.Schema)
elem.Attributes.Remove (nsa);
foreach (var e in elem.ChildNodes.OfType<XmlElement> ().ToArray ()) {
Indent (format, e, false);
FormatElement (format, e);
}
}
internal void Load (string file, MSBuildXmlReader reader)
{
AssertCanModify ();
try {
this.file = file;
IsNewProject = false;
format = FileUtil.GetTextFormatInfo (file);
// HACK: XmlStreamReader will fail if the file is encoded in UTF-8 but has <?xml version="1.0" encoding="utf-16"?>
// To work around this, we load the XML content into a string and use XmlDocument.LoadXml() instead.
string xml = File.ReadAllText (file);
LoadXml (xml, reader);
} finally {
EnableChangeTracking ();
}
}
static void SetIndent (TextFormatInfo format, XmlElement elem, string indent)
{
if (string.IsNullOrEmpty (indent) || elem.ParentNode == null)
return;
bool foundLineBreak = RemoveIndent (elem.PreviousSibling);
string newIndent = foundLineBreak ? indent : format.NewLine + indent;
var ws = elem.OwnerDocument.CreateWhitespace (newIndent);
if (elem.ParentNode is XmlDocument) {
// MS.NET doesn't allow inserting whitespace if there is a document element. The workaround
// is to remove the element, add the space, then add back the element
var doc = elem.OwnerDocument;
doc.RemoveChild (elem);
doc.AppendChild (ws);
doc.AppendChild (elem);
} else
elem.ParentNode.InsertBefore (ws, elem);
if (elem.ChildNodes.OfType<XmlElement> ().Any ()) {
foundLineBreak = RemoveIndent (elem.LastChild);
newIndent = foundLineBreak ? indent : format.NewLine + indent;
elem.AppendChild (elem.OwnerDocument.CreateWhitespace (newIndent));
}
}
static void Indent (TextFormatInfo format, XmlElement elem, string indent)
{
SetIndent (format, elem, indent);
foreach (var c in elem.ChildNodes.OfType<XmlElement> ())
Indent (format, c, indent + " ");
}
public static void Indent (TextFormatInfo format, XmlElement elem, bool closeInNewLine)
{
var prev = FindPreviousSibling (elem);
string indent;
if (prev != null)
indent = GetIndentString (prev);
else if (elem != elem.OwnerDocument.DocumentElement)
indent = GetIndentString (elem.ParentNode) + " ";
else
indent = "";
Indent (format, elem, indent);
if (elem.ChildNodes.Count == 0 && closeInNewLine) {
var ws = elem.OwnerDocument.CreateWhitespace (format.NewLine + indent);
elem.AppendChild (ws);
}
if (elem.NextSibling is XmlElement)
SetIndent (format, (XmlElement)elem.NextSibling, indent);
if (elem.NextSibling == null && elem != elem.OwnerDocument.DocumentElement && elem.ParentNode != null) {
var parentIndent = GetIndentString (elem.ParentNode);
var ws = elem.OwnerDocument.CreateWhitespace (format.NewLine + parentIndent);
elem.ParentNode.InsertAfter (ws, elem);
}
}
