public PathParser(string path)
{
Debug.Assert(path != null);
this.path = path;
length = path.Length;
leftIndexInPath = 0;
rightIndexInPath = 0;
current = new ParsedPathComponent();
}
// Update parsing state and 'current' to next component in path.
// Returns true if the was another component or false if the end of the path was reached.
public bool MoveToNextComponent()
{
// See if we've the end of the path string.
if (rightIndexInPath == length)
{
return(false);
}
// Make our current right index our new left index and find
// a new right index from there.
leftIndexInPath = rightIndexInPath;
if (path[leftIndexInPath] == '/')
{
++leftIndexInPath;
rightIndexInPath = leftIndexInPath;
if (leftIndexInPath == length)
{
return(false);
}
}
// Parse <...> layout part, if present.
var layout = new Substring();
if (rightIndexInPath < length && path[rightIndexInPath] == '<')
{
layout = ParseComponentPart('>');
}
// Parse {...} usage part, if present.
var usage = new Substring();
if (rightIndexInPath < length && path[rightIndexInPath] == '{')
{
usage = ParseComponentPart('}');
}
// Parse name part, if present.
var name = new Substring();
if (rightIndexInPath < length && path[rightIndexInPath] != '/')
{
name = ParseComponentPart('/');
}
current = new ParsedPathComponent
{
layout = layout,
usage = usage,
name = name
};
return(leftIndexInPath != rightIndexInPath);
}
// Update parsing state and 'current' to next component in path.
// Returns true if the was another component or false if the end of the path was reached.
public bool MoveToNextComponent()
{
// See if we've the end of the path string.
if (rightIndexInPath == length)
{
return(false);
}
// Make our current right index our new left index and find
// a new right index from there.
leftIndexInPath = rightIndexInPath;
if (path[leftIndexInPath] == '/')
{
++leftIndexInPath;
rightIndexInPath = leftIndexInPath;
if (leftIndexInPath == length)
{
return(false);
}
}
// Parse <...> layout part, if present.
var layout = new Substring();
if (rightIndexInPath < length && path[rightIndexInPath] == '<')
{
layout = ParseComponentPart('>');
}
// Parse {...} usage part, if present.
var usages = new List <Substring>();
while (rightIndexInPath < length && path[rightIndexInPath] == '{')
{
usages.Add(ParseComponentPart('}'));
}
// Parse display name part, if present.
var displayName = new Substring();
if (rightIndexInPath < length - 1 && path[rightIndexInPath] == '#' && path[rightIndexInPath + 1] == '(')
{
++rightIndexInPath;
displayName = ParseComponentPart(')');
}
// Parse name part, if present.
var name = new Substring();
if (rightIndexInPath < length && path[rightIndexInPath] != '/')
{
name = ParseComponentPart('/');
}
current = new ParsedPathComponent
{
layout = layout,
usages = usages.ToArray(),
name = name,
displayName = displayName
};
return(leftIndexInPath != rightIndexInPath);
}
