/// <summary>
/// Replaces the beginning of path. Modifies original object and returns it.
/// </summary>
/// <param name="oldBase"></param>
/// <param name="newBase"></param>
/// <returns></returns>
public AbsoluteCrosspath Rebase(AbsoluteCrosspath oldBase, AbsoluteCrosspath newBase)
{
if (directories.Count < oldBase.directories.Count)
{
return(this);
}
Boolean cantRebase = false;
using (var myIter = directories.GetEnumerator()) {
using (var theirsIter = oldBase.directories.GetEnumerator()) {
for (int idx = 0; idx < oldBase.directories.Count; idx++)
{
myIter.MoveNext();
theirsIter.MoveNext();
if (myIter.Current != theirsIter.Current)
{
cantRebase = true;
break;
}
}
}
}
if (cantRebase)
{
return(this);
}
// rebasing
if (directories.Count == oldBase.directories.Count)
{
// full rebase, replacing the whole path
directories = new LinkedList <String>(newBase.directories);
}
else
{
for (int idx = 0; idx < oldBase.directories.Count; idx++)
{
directories.RemoveFirst();
}
LinkedListNode <String> lln = directories.First;
foreach (String dir in newBase.directories)
{
directories.AddBefore(lln, dir);
}
}
// rerooting
if (newBase.Flavor == CrosspathFlavor.Windows)
{
WindowsRootDrive = newBase.WindowsRootDrive;
}
Flavor = newBase.Flavor;
return(this);
}
internal Boolean EqualsToAbsolute(AbsoluteCrosspath absoluteCrosspath)
{
if (WorkingDirectory is null)
{
return(false);
}
// Do not use base comparer there!
return(this.ToAbsolutizedString() == absoluteCrosspath.ToAbsolutizedString());
}
public static AbsoluteCrosspath FromString(String path, AbsoluteCrosspath workingDir)
{
Crosspath xpath = Crosspath.FromString(path);
if (!(xpath is AbsoluteCrosspath))
{
return(((RelativeCrosspath)xpath).Absolutized(workingDir));
}
return(xpath as AbsoluteCrosspath);
}
/// <summary>
/// Create a generic Crosspath object, which is actually an
/// AbsoluteCrosspath or RelativeCrosspath depending on the input string.
/// </summary>
/// <param name="path">Any path string.</param>
/// <returns>Crosspath object.</returns>
public static Crosspath FromString(String path)
{
DetectParams(path, out CrosspathOrigin origin, out CrosspathFlavor flavor, out Char rootDrive);
Crosspath xpath;
switch (origin)
{
case CrosspathOrigin.Absolute:
xpath = AbsoluteCrosspath.CreateInstance();
break;
case CrosspathOrigin.Relative:
xpath = RelativeCrosspath.CreateInstance();
break;
default:
throw new ArgumentOutOfRangeException();
}
xpath.Origin = origin;
xpath.Flavor = flavor;
xpath.WindowsRootDrive = rootDrive;
xpath.SourceString = path;
xpath.directories = new LinkedList <String>();
// push directories
String[] parts;
if (flavor == CrosspathFlavor.Windows)
{
if (origin == CrosspathOrigin.Absolute)
{
path = path.Substring(2);
}
parts = path.Split(new[] { '/', '\\' }, StringSplitOptions.RemoveEmptyEntries);
}
else /* if (Flavor == CrosspathFlavor.FlavorUnix) */
{
parts = path.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
}
foreach (String part in parts)
{
// TODO: check `part` for validity
xpath.Chdir(part);
}
return(xpath);
}
/// <summary>
/// Construct a new AbsoluteCrosspath object from this RelativeCrosspath object and custom working directory.
/// </summary>
/// <param name="root">A working directory for this relative path.</param>
/// <returns>AbsoluteCrosspath</returns>
public AbsoluteCrosspath Absolutized(AbsoluteCrosspath root)
{
return(new AbsoluteCrosspath(root).Append(this));
}
public void SetWorkingDirectory(AbsoluteCrosspath workdir)
{
this.WorkingDirectory = workdir;
}
/// <summary>
/// Creates a copy of instance.
/// </summary>
/// <param name="source">Source RelativeCrosspath object, which will remain untouched.</param>
public RelativeCrosspath(RelativeCrosspath source) : base(source)
{
this.WorkingDirectory = source.WorkingDirectory;
}
public static RelativeCrosspath CreateRelativePath(AbsoluteCrosspath xpath, AbsoluteCrosspath workingDirectory, Boolean dontGoOut)
{
if (xpath.Flavor != workingDirectory.Flavor)
{
throw new PolymorphismException("can relativize only identically-flavored paths");
}
if (xpath.Flavor == CrosspathFlavor.Windows && xpath.WindowsRootDrive != workingDirectory.WindowsRootDrive)
{
throw new CrosspathLibException("cannot relativize different root drives");
}
/*
* RelativeCrosspath ret = RelativeCrosspath.CreateInstance();
* ret.Flavor = xpath.Flavor;
* ret.Origin = CrosspathOrigin.Relative;
* ret.WindowsRootDrive = xpath.WindowsRootDrive;
* ret.directories = new LinkedList<String>();
*/
RelativeCrosspath ret = RelativeCrosspath.FromString("");
ret.Flavor = xpath.Flavor;
ret.WindowsRootDrive = xpath.WindowsRootDrive;
ret.SetWorkingDirectory(workingDirectory);
using (var myIter = xpath.directories.GetEnumerator()) {
using (var theirsIter = workingDirectory.directories.GetEnumerator()) {
Boolean myMoved;
Boolean theirsMoved;
// first find a diverging point
while (true)
{
myMoved = myIter.MoveNext();
theirsMoved = theirsIter.MoveNext();
if (!myMoved || !theirsMoved)
{
break;
}
if (myIter.Current != theirsIter.Current)
{
break;
}
}
if (theirsMoved && dontGoOut)
{
throw new CrosspathLibException("path is outide of working dir");
}
// then go back from workingDirectory and go forth on xpath
for (; theirsMoved; theirsMoved = theirsIter.MoveNext())
{
ret.Chdir("..");
}
for (; myMoved; myMoved = myIter.MoveNext())
{
ret.Chdir(myIter.Current);
}
}
}
return(ret);
}
public static AbsoluteCrosspath GetCurrentDirectory()
{
String pwd = Directory.GetCurrentDirectory();
return(AbsoluteCrosspath.FromString(pwd));
}
/// <summary>
/// Creates a copy of instance.
/// </summary>
/// <param name="source">Source AbsoluteCrosspath object, which will remain untouched.</param>
public AbsoluteCrosspath(AbsoluteCrosspath source) : base(source)
{
// no new fields are introduced
}
public RelativeCrosspath Relativized(AbsoluteCrosspath workingDir, Boolean dontGoOut = false)
{
return(RelativeCrosspath.CreateRelativePath(this, workingDir, dontGoOut));
}