///<summary>Normalizes all URLs in a CSS parse tree to be relative to the specified directory.</summary>
///<param name="tree">The CSS parse tree to read.</param>
///<param name="targetFile">The new filename to make URLs relative to.</param>
///<param name="oldBasePath">The previous filename to resolve existing relative paths from. If null, relative paths will be left unchanged.</param>
///<returns>The rewritten CSS source.</returns>
///<remarks>
/// This is used to combine CSS files from different folders into a single
/// bundle and to fix absolute URLs from the hacked browser LESS compiler.
/// Fully absolute paths (starting with a drive letter) will be changed to
/// relative URLs using targetFile (fix for LESS compiler).
/// Host-relative paths (starting with a /) will be unchanged.
/// Normal relative paths (starting with . or a name) will be re-resolved.
///</remarks>
public static string NormalizeUrls(BlockItem tree, string targetFile, string oldBasePath)
{
var normalizer = new CssUrlNormalizer(targetFile, oldBasePath);
tree.Accept(normalizer);
var retVal = new StringBuilder(tree.Text);
for (int i = normalizer.replacements.Count - 1; i >= 0; i--)
{
var range = normalizer.replacements[i].Item1;
var url = normalizer.replacements[i].Item2;
retVal.Remove(range.Start, range.Length);
retVal.Insert(range.Start, HttpUtility.UrlPathEncode(url));
}
return retVal.ToString();
}
///<summary>Normalizes all URLs in a CSS parse tree to be relative to the specified directory.</summary>
///<param name="tree">The CSS parse tree to read.</param>
///<param name="targetFile">The new filename to make URLs relative to.</param>
///<param name="oldBasePath">The previous filename to resolve existing relative paths from. If null, relative paths will be left unchanged.</param>
///<returns>The rewritten CSS source.</returns>
///<remarks>
/// This is used to combine CSS files from different folders into a single
/// bundle and to fix absolute URLs from the hacked browser LESS compiler.
/// Fully absolute paths (starting with a drive letter) will be changed to
/// relative URLs using targetFile (fix for LESS compiler).
/// Host-relative paths (starting with a /) will be unchanged.
/// Normal relative paths (starting with . or a name) will be re-resolved.
///</remarks>
public static string NormalizeUrls(BlockItem tree, string targetFile, string oldBasePath)
{
var normalizer = new CssUrlNormalizer(targetFile, oldBasePath);
tree.Accept(normalizer);
var retVal = new StringBuilder(tree.Text);
for (int i = normalizer.replacements.Count - 1; i >= 0; i--)
{
var range = normalizer.replacements[i].Item1;
var url = normalizer.replacements[i].Item2;
retVal.Remove(range.Start, range.Length);
retVal.Insert(range.Start, HttpUtility.UrlPathEncode(url));
}
return(retVal.ToString());
}
