public DefaultImportDocumentSnapshot(ProjectSnapshot project, RazorProjectItem item)
{
_project = project;
_importItem = item;
_version = VersionStamp.Default;
_generatedOutput = new DocumentGeneratedOutputTracker(null);
}
private async Task <RazorCodeDocument> GetGeneratedOutputInitializationTaskCore(ProjectSnapshot project, DocumentSnapshot document)
{
var tagHelpers = await project.GetTagHelpersAsync().ConfigureAwait(false);
var imports = await GetImportsAsync(project, document);
if (_older != null && _older.IsResultAvailable)
{
var tagHelperDifference = new HashSet <TagHelperDescriptor>(TagHelperDescriptorComparer.Default);
tagHelperDifference.UnionWith(_older._tagHelpers);
tagHelperDifference.SymmetricExceptWith(tagHelpers);
var importDifference = new HashSet <ImportItem>();
importDifference.UnionWith(_older._imports);
importDifference.SymmetricExceptWith(imports);
if (tagHelperDifference.Count == 0 && importDifference.Count == 0)
{
// We can use the cached result.
var result = _older._task.Result;
// Drop reference so it can be GC'ed
_older = null;
// Cache the tag helpers and imports so the next version can use them
_tagHelpers = tagHelpers;
_imports = imports;
return(result);
}
}
// Drop reference so it can be GC'ed
_older = null;
// Cache the tag helpers and imports so the next version can use them
_tagHelpers = tagHelpers;
_imports = imports;
var importSources = new List <RazorSourceDocument>();
foreach (var item in imports)
{
var sourceDocument = await GetRazorSourceDocumentAsync(item.Import);
importSources.Add(sourceDocument);
}
var documentSource = await GetRazorSourceDocumentAsync(document);
var projectEngine = project.GetProjectEngine();
return(projectEngine.ProcessDesignTime(documentSource, importSources, tagHelpers));
}
public DocumentState(DocumentState previous, ProjectDifference difference)
{
if (previous == null)
{
throw new ArgumentNullException(nameof(previous));
}
Services = previous.Services;
HostDocument = previous.HostDocument;
Version = previous.Version.GetNewerVersion();
_generatedOutput = previous._generatedOutput?.ForkFor(this, difference);
}
private async Task <RazorCodeDocument> GetGeneratedOutputInitializationTaskCore(ProjectSnapshot project, DocumentSnapshot document)
{
var tagHelpers = await project.GetTagHelpersAsync().ConfigureAwait(false);
if (_older != null && _older.IsResultAvailable)
{
var difference = new HashSet <TagHelperDescriptor>(TagHelperDescriptorComparer.Default);
difference.UnionWith(_older._tagHelpers);
difference.SymmetricExceptWith(tagHelpers);
if (difference.Count == 0)
{
// We can use the cached result.
var result = _older._task.Result;
// Drop reference so it can be GC'ed
_older = null;
// Cache the tag helpers so the next version can use them
_tagHelpers = tagHelpers;
return(result);
}
}
// Drop reference so it can be GC'ed
_older = null;
// Cache the tag helpers so the next version can use them
_tagHelpers = tagHelpers;
var projectEngine = project.GetProjectEngine();
var projectItem = projectEngine.FileSystem.GetItem(document.FilePath);
return(projectItem == null ? null : projectEngine.ProcessDesignTime(projectItem));
}
public DocumentGeneratedOutputTracker(DocumentGeneratedOutputTracker older)
{
_older = older;
_lock = new object();
}
