public override bool FileExists(string virtualPath)
{
var exists = false;
var styleResult = ThemeHelper.IsStyleSheet(virtualPath);
TokenizedSassPath sassPath = null;
if (styleResult != null)
{
exists = _sassCheckedPathStack.Check(styleResult, out sassPath);
if (exists)
{
// It seems awkward to return false when check result actually says true.
// But true in this context means: a check for THIS sass file pattern (e.g. _slick.scss.sass)
// yielded true previously (because _slick.scss really exists on disks), therefore _slick.scss.sass
// CANNOT exist (or SHOULD not by convention). By returning false we prevent that a real filesystem check
// is made against _slick.scss.sass (which is huge performace saver considering that IThemeFileResolver
// also does some additional checks).
return(false);
}
if (styleResult.IsThemeVars || styleResult.IsModuleImports)
{
_sassCheckedPathStack.PushExistingPath(sassPath);
return(true);
}
}
exists = base.FileExists(virtualPath);
if (exists && sassPath != null)
{
_sassCheckedPathStack.PushExistingPath(sassPath);
}
return(exists);
}
public void PushExistingPath(TokenizedSassPath path)
{
_state.GetState().Push(path);
}
/// <summary>
/// Checks last path existence
/// </summary>
/// <returns>true = does exist, no need to check | false = not checked yet</returns>
public bool Check(StyleSheetResult styleResult, out TokenizedSassPath path)
{
path = new TokenizedSassPath(styleResult);
var state = _state.GetState();
if (state.Count == 0)
{
return(false);
}
var currentPath = path;
var lastPath = _state.GetState().Peek();
if (currentPath.Extension.IsEmpty())
{
// We dont't allow extension-less Sass files, so no need to check.
return(true);
}
if (lastPath.Dir != currentPath.Dir)
{
return(false);
}
if (currentPath.StyleResult.IsBaseImport && lastPath.StyleResult.IsBaseImport && currentPath.FileName == lastPath.FileName)
{
return(true);
}
if (currentPath.StyleResult.IsModuleImports && lastPath.StyleResult.IsModuleImports)
{
return(true);
}
if (currentPath.StyleResult.IsThemeVars && lastPath.StyleResult.IsThemeVars)
{
return(true);
}
// slick.scss.(scss|sass|css) > slick.scss
if (Path.GetExtension(currentPath.FileNameWithoutExtension) == ".scss")
{
return(true);
}
// slick.(sass|css) > slick.scss
if (!currentPath.StyleResult.IsBaseImport && _styleExtensions.Contains(currentPath.Extension) && currentPath.FileNameWithoutExtension == lastPath.FileNameWithoutExtension)
{
return(true);
}
// _slick.scss > slick.scss
if (currentPath.FileName.StartsWith("_"))
{
if (currentPath.FileName.Substring(1) == lastPath.FileName)
{
return(true);
}
}
// slick.(scss|sass|css) > _slick.scss
if (lastPath.FileNameWithoutExtension.StartsWith("_"))
{
if (lastPath.FileNameWithoutExtension == "_" + currentPath.FileNameWithoutExtension)
{
return(true);
}
}
return(false);
}