public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart)
{
var styleResult = ThemeHelper.IsStyleSheet(virtualPath);
if (styleResult == null || styleResult.IsCss)
{
return(base.GetCacheDependency(virtualPath, virtualPathDependencies, utcStart));
}
if (styleResult.IsThemeVars || styleResult.IsModuleImports)
{
return(null);
}
// Is Sass Or Less Or StyleBundle
var arrPathDependencies = virtualPathDependencies.Cast <string>().ToArray();
// Exclude the special imports from the file dependencies list,
// 'cause this one cannot be monitored by the physical file system
var fileDependencies = ThemeHelper.RemoveVirtualImports(arrPathDependencies);
if (fileDependencies == arrPathDependencies)
{
// No themevars or moduleimports import... so no special considerations here
return(base.GetCacheDependency(virtualPath, virtualPathDependencies, utcStart));
}
if (fileDependencies.Any())
{
string cacheKey = null;
var isThemeableAsset = (!styleResult.IsBundle && ThemeHelper.PathIsInheritableThemeFile(virtualPath)) ||
(styleResult.IsBundle && fileDependencies.Any(x => ThemeHelper.PathIsInheritableThemeFile(x)));
if (isThemeableAsset)
{
var theme = ThemeHelper.ResolveCurrentTheme();
int storeId = ThemeHelper.ResolveCurrentStoreId();
// invalidate the cache when variables change
cacheKey = FrameworkCacheConsumer.BuildThemeVarsCacheKey(theme.ThemeName, storeId);
if (styleResult.IsSass && (ThemeHelper.IsStyleValidationRequest()))
{
// Special case: ensure that cached validation result gets nuked in a while,
// when ThemeVariableService publishes the entity changed messages.
return(new CacheDependency(new string[0], new string[] { cacheKey }, utcStart));
}
}
return(new CacheDependency(
ThemingVirtualPathProvider.MapDependencyPaths(fileDependencies),
cacheKey == null ? new string[0] : new string[] { cacheKey },
utcStart));
}
return(null);
}
private void RegisterVirtualPathProviders()
{
var vppSystem = HostingEnvironment.VirtualPathProvider;
var vppTheme = new ThemingVirtualPathProvider(vppSystem);
// register virtual path provider for theming (file inheritance handling etc.)
HostingEnvironment.RegisterVirtualPathProvider(vppTheme);
// register virtual path provider for bundling (Sass, Less & variables handling)
BundleTable.VirtualPathProvider = new BundlingVirtualPathProvider(vppSystem);
}