private Task SearchInit(string toFind)
{
_cancellationSource = new CancellationTokenSource();
_textSearcher = new KmpTextSearcher(Encoding.GetBytes(toFind));
return(Task.Run(() => SearchInDirectory(_textSearcher, SearchDirectory), _cancellationSource.Token));
}
// TODO: Make async enumerable with c# 8 and netcoreapp31
private async Task SearchInDirectory(ITextSearcher textSearcher, string directory)
{
foreach (var file in Directory.EnumerateFiles(SearchDirectory))
{
if (_cancellationSource?.IsCancellationRequested ?? true)
{
return;
}
if (new FileInfo(file).Length > FileSizeLimitInBytes)
{
continue;
}
// SearchAsync string in file
var foundOffset = await textSearcher.SearchAsync(new BinaryReader(File.OpenRead(file)));
if (foundOffset >= 0)
{
OnFoundMatch(new SequenceSearchResult(file, foundOffset));
}
}
if (!IsSearchSubDirectories)
{
return;
}
foreach (var dir in Directory.EnumerateDirectories(directory))
{
await SearchInDirectory(textSearcher, dir);
}
}
internal TextSearcherViewModel(ITextSearcher textSearcher)
{
mTextSearcher = textSearcher;
mTextSearcherAsCaptionProvider = textSearcher as ICaptionProvider;
mTextSearcherAsDescriptionProvider = textSearcher as IDescriptionProvider;
mTextSearcherAsIconProvider = textSearcher as IIconProvider;
}
/// <summary>
/// Handles change of the SelectedTextSearcher property.
/// </summary>
/// <param name="SelectedTextSearcher">New SelectedTextSearcher.</param>
protected virtual void OnSelectedTextSearcherChanged(ITextSearcher previousTextSearcher, ITextSearcher currentTextSearcher)
{
IOptionsProvider optionsProvider = previousTextSearcher as IOptionsProvider;
if (optionsProvider != null)
{
optionsProvider.OptionChanged -= OnTextSearcherOptionChanged;
}
optionsProvider = currentTextSearcher as IOptionsProvider;
if (optionsProvider != null)
{
optionsProvider.OptionChanged += OnTextSearcherOptionChanged;
}
Find(SearchTerm, ImmediateSearch);
}
//get a class that has the requaired interface
public FileTextSearcher(ITextSearcher textSearcher)
{
this.textSearcher = textSearcher;
}
