public TailViewModel([NotNull] ILogger logger,
[NotNull] ISchedulerProvider schedulerProvider,
[NotNull] IFileWatcher fileWatcher,
[NotNull] ISelectionMonitor selectionMonitor,
[NotNull] IClipboardHandler clipboardHandler,
[NotNull] ISearchInfoCollection searchInfoCollection,
[NotNull] IInlineViewerFactory inlineViewerFactory,
[NotNull] ISetting <GeneralOptions> generalOptions,
[NotNull] ISearchMetadataCollection searchMetadataCollection,
[NotNull] IStateBucketService stateBucketService,
[NotNull] SearchOptionsViewModel searchOptionsViewModel,
[NotNull] ITailViewStateRestorer restorer,
[NotNull] SearchHints searchHints,
[NotNull] ITailViewStateControllerFactory tailViewStateControllerFactory)
{
if (logger == null)
{
throw new ArgumentNullException(nameof(logger));
}
if (schedulerProvider == null)
{
throw new ArgumentNullException(nameof(schedulerProvider));
}
if (fileWatcher == null)
{
throw new ArgumentNullException(nameof(fileWatcher));
}
if (selectionMonitor == null)
{
throw new ArgumentNullException(nameof(selectionMonitor));
}
if (clipboardHandler == null)
{
throw new ArgumentNullException(nameof(clipboardHandler));
}
if (searchInfoCollection == null)
{
throw new ArgumentNullException(nameof(searchInfoCollection));
}
if (inlineViewerFactory == null)
{
throw new ArgumentNullException(nameof(inlineViewerFactory));
}
if (generalOptions == null)
{
throw new ArgumentNullException(nameof(generalOptions));
}
if (searchMetadataCollection == null)
{
throw new ArgumentNullException(nameof(searchMetadataCollection));
}
if (stateBucketService == null)
{
throw new ArgumentNullException(nameof(stateBucketService));
}
if (searchOptionsViewModel == null)
{
throw new ArgumentNullException(nameof(searchOptionsViewModel));
}
if (searchHints == null)
{
throw new ArgumentNullException(nameof(searchHints));
}
Name = fileWatcher.FullName;
SelectionMonitor = selectionMonitor;
SearchOptions = searchOptionsViewModel;
SearchHints = searchHints;
SearchCollection = new SearchCollection(searchInfoCollection, schedulerProvider);
CopyToClipboardCommand = new Command(() => clipboardHandler.WriteToClipboard(selectionMonitor.GetSelectedText()));
OpenFileCommand = new Command(() => Process.Start(fileWatcher.FullName));
OpenFolderCommand = new Command(() => Process.Start(fileWatcher.Folder));
SearchMetadataCollection = searchMetadataCollection;
var horizonalScrollArgs = new ReplaySubject <TextScrollInfo>(1);
HorizonalScrollChanged = args =>
{
horizonalScrollArgs.OnNext(args);
};
_tailViewStateControllerFactory = tailViewStateControllerFactory;
//Move these 2 highlight fields to a service as all views require them
UsingDarkTheme = generalOptions.Value
.ObserveOn(schedulerProvider.MainThread)
.Select(options => options.Theme == Theme.Dark)
.ForBinding();
HighlightTail = generalOptions.Value
.ObserveOn(schedulerProvider.MainThread)
.Select(options => options.HighlightTail)
.ForBinding();
//this deals with state when loading the system at start up and at shut-down
_persister = new TailViewPersister(this, restorer);
//An observable which acts as a scroll command
var autoChanged = this.WhenValueChanged(vm => vm.AutoTail);
var scroller = _userScrollRequested.CombineLatest(autoChanged, (user, auto) =>
{
var mode = AutoTail ? ScrollReason.Tail : ScrollReason.User;
return(new ScrollRequest(mode, user.PageSize, user.FirstIndex));
})
.Do(x => logger.Info("Scrolling to {0}/{1}", x.FirstIndex, x.PageSize))
.DistinctUntilChanged();
FileStatus = fileWatcher.Status.ForBinding();
//command to add the current search to the tail collection
var searchInvoker = SearchHints.SearchRequested.Subscribe(request =>
{
searchInfoCollection.Add(request.Text, request.UseRegEx);
});
//User feedback to show file size
FileSizeText = fileWatcher.Latest.Select(fn => fn.Size)
.Select(size => size.FormatWithAbbreviation())
.DistinctUntilChanged()
.ForBinding();
//tailer is the main object used to tail, scroll and filter in a file
var lineScroller = new LineScroller(SearchCollection.Latest.ObserveOn(schedulerProvider.Background), scroller);
MaximumChars = lineScroller.MaximumLines()
.ObserveOn(schedulerProvider.MainThread)
.ForBinding();
//load lines into observable collection
var lineProxyFactory = new LineProxyFactory(new TextFormatter(searchMetadataCollection), new LineMatches(searchMetadataCollection), horizonalScrollArgs.DistinctUntilChanged());
var loader = lineScroller.Lines.Connect()
.LogChanges(logger, "Received")
.Transform(lineProxyFactory.Create, new ParallelisationOptions(ParallelType.Ordered, 3))
.LogChanges(logger, "Sorting")
.Sort(SortExpressionComparer <LineProxy> .Ascending(proxy => proxy))
.ObserveOn(schedulerProvider.MainThread)
.Bind(out _data, 100)
.LogChanges(logger, "Bound")
.DisposeMany()
.LogErrors(logger)
.Subscribe();
//monitor matching lines and start index,
Count = searchInfoCollection.All.Select(latest => latest.Count).ForBinding();
CountText = searchInfoCollection.All.Select(latest => $"{latest.Count.ToString("##,###")} lines").ForBinding();
LatestCount = SearchCollection.Latest.Select(latest => latest.Count).ForBinding();
////track first visible index
var firstIndexMonitor = lineScroller.Lines.Connect()
.Buffer(TimeSpan.FromMilliseconds(25)).FlattenBufferResult()
.ToCollection()
.Select(lines => lines.Count == 0 ? 0 : lines.Select(l => l.Index).Max() - lines.Count + 1)
.ObserveOn(schedulerProvider.MainThread)
.Subscribe(first =>
{
FirstIndex = first;
});
//Create objects required for inline viewing
var isUserDefinedChanged = SearchCollection.WhenValueChanged(sc => sc.Selected)
.Where(selected => selected != null)
.Select(selected => selected.IsUserDefined)
.DistinctUntilChanged()
.Replay(1)
.RefCount();
var inlineViewerVisible = isUserDefinedChanged.CombineLatest(this.WhenValueChanged(vm => vm.ShowInline),
(userDefined, showInline) => userDefined && showInline);
CanViewInline = isUserDefinedChanged.ForBinding();
InlineViewerVisible = inlineViewerVisible.ForBinding();
//return an empty line provider unless user is viewing inline - this saves needless trips to the file
var inline = searchInfoCollection.All.CombineLatest(inlineViewerVisible, (index, ud) => ud ? index : new EmptyLineProvider());
InlineViewer = inlineViewerFactory.Create(inline, this.WhenValueChanged(vm => vm.SelectedItem), searchMetadataCollection);
_cleanUp = new CompositeDisposable(lineScroller,
loader,
firstIndexMonitor,
FileStatus,
Count,
LatestCount,
FileSizeText,
CanViewInline,
InlineViewer,
InlineViewerVisible,
SearchCollection,
searchInfoCollection,
HighlightTail,
UsingDarkTheme,
searchHints,
searchMetadataCollection,
SelectionMonitor,
SearchOptions,
searchInvoker,
MaximumChars,
_stateMonitor,
horizonalScrollArgs.SetAsComplete(),
_userScrollRequested.SetAsComplete());
}
public TailViewModel([NotNull] ILogger logger,
[NotNull] ISchedulerProvider schedulerProvider,
[NotNull] IFileWatcher fileWatcher,
[NotNull] ISelectionMonitor selectionMonitor,
[NotNull] IClipboardHandler clipboardHandler,
[NotNull] ISearchInfoCollection searchInfoCollection,
[NotNull] IInlineViewerFactory inlineViewerFactory,
[NotNull] GeneralOptionBindings generalOptionBindings,
[NotNull] ICombinedSearchMetadataCollection combinedSearchMetadataCollection,
[NotNull] IStateBucketService stateBucketService,
[NotNull] ITailViewStateRestorer restorer,
[NotNull] SearchHints searchHints,
[NotNull] ITailViewStateControllerFactory tailViewStateControllerFactory,
[NotNull] IThemeProvider themeProvider,
[NotNull] SearchCollection searchCollection,
[NotNull] ITextFormatter textFormatter,
[NotNull] ILineMatches lineMatches,
[NotNull] IObjectProvider objectProvider,
[NotNull] IDialogCoordinator dialogCoordinator)
{
if (logger == null)
{
throw new ArgumentNullException(nameof(logger));
}
if (schedulerProvider == null)
{
throw new ArgumentNullException(nameof(schedulerProvider));
}
if (fileWatcher == null)
{
throw new ArgumentNullException(nameof(fileWatcher));
}
if (clipboardHandler == null)
{
throw new ArgumentNullException(nameof(clipboardHandler));
}
if (searchInfoCollection == null)
{
throw new ArgumentNullException(nameof(searchInfoCollection));
}
if (inlineViewerFactory == null)
{
throw new ArgumentNullException(nameof(inlineViewerFactory));
}
if (stateBucketService == null)
{
throw new ArgumentNullException(nameof(stateBucketService));
}
if (themeProvider == null)
{
throw new ArgumentNullException(nameof(themeProvider));
}
if (textFormatter == null)
{
throw new ArgumentNullException(nameof(textFormatter));
}
if (lineMatches == null)
{
throw new ArgumentNullException(nameof(lineMatches));
}
if (objectProvider == null)
{
throw new ArgumentNullException(nameof(objectProvider));
}
if (dialogCoordinator == null)
{
throw new ArgumentNullException(nameof(dialogCoordinator));
}
if (combinedSearchMetadataCollection == null)
{
throw new ArgumentNullException(nameof(combinedSearchMetadataCollection));
}
Name = fileWatcher.FullName;
SelectionMonitor = selectionMonitor ?? throw new ArgumentNullException(nameof(selectionMonitor));
GeneralOptionBindings = generalOptionBindings;
SearchHints = searchHints ?? throw new ArgumentNullException(nameof(searchHints));
CopyToClipboardCommand = new Command(() => clipboardHandler.WriteToClipboard(selectionMonitor.GetSelectedText()));
OpenFileCommand = new Command(() => Process.Start(fileWatcher.FullName));
OpenFolderCommand = new Command(() => Process.Start(fileWatcher.Folder));
CopyPathToClipboardCommand = new Command(() => clipboardHandler.WriteToClipboard(fileWatcher.FullName));
UnClearCommand = new Command(fileWatcher.Reset);
ClearCommand = new Command(fileWatcher.Clear);
KeyAutoTail = new Command(() => { AutoTail = true; });
OpenSearchOptionsCommand = new Command(async() =>
{
await Task.Run(() =>
{
var content = objectProvider.Get <SearchOptionsViewModel>(new Argument <ICombinedSearchMetadataCollection>(combinedSearchMetadataCollection));
dialogCoordinator.Show(this, content, x => content.Dispose());
});
});
var closeOnDeselect = this.WhenValueChanged(vm => vm.IsSelected, false)
.Where(selected => !selected)
.Subscribe(_ => dialogCoordinator.Close());
SearchCollection = searchCollection ?? throw new ArgumentNullException(nameof(searchCollection));
SearchMetadataCollection = combinedSearchMetadataCollection.Local;
var horizonalScrollArgs = new ReplaySubject <TextScrollInfo>(1);
HorizonalScrollChanged = args => horizonalScrollArgs.OnNext(args);
_tailViewStateControllerFactory = tailViewStateControllerFactory;
//this deals with state when loading the system at start up and at shut-down
_persister = new TailViewPersister(this, restorer);
FileStatus = fileWatcher.Status.ForBinding();
//command to add the current search to the tail collection
var searchInvoker = SearchHints.SearchRequested.Subscribe(request => searchInfoCollection.Add(request.Text, request.UseRegEx));
//An observable which acts as a scroll command
var autoChanged = this.WhenValueChanged(vm => vm.AutoTail);
var scroller = _userScrollRequested.CombineLatest(autoChanged, (user, auto) =>
{
var mode = AutoTail ? ScrollReason.Tail : ScrollReason.User;
return(new ScrollRequest(mode, user.PageSize, user.FirstIndex));
})
.Do(x => logger.Info("Scrolling to {0}/{1}", x.FirstIndex, x.PageSize))
.DistinctUntilChanged();
//User feedback to show file size
FileSizeText = fileWatcher.Latest.Select(fn => fn.Size)
.Select(size => size.FormatWithAbbreviation())
.DistinctUntilChanged()
.ForBinding();
//tailer is the main object used to tail, scroll and filter in a file
var selectedProvider = SearchCollection.Latest.ObserveOn(schedulerProvider.Background);
var lineScroller = new LineScroller(selectedProvider, scroller);
MaximumChars = lineScroller.MaximumLines()
.ObserveOn(schedulerProvider.MainThread)
.ForBinding();
var lineProxyFactory = new LineProxyFactory(textFormatter, lineMatches, horizonalScrollArgs.DistinctUntilChanged(), themeProvider);
var loader = lineScroller.Lines.Connect()
.LogChanges(logger, "Received")
.Transform(lineProxyFactory.Create)
.LogChanges(logger, "Sorting")
.Sort(SortExpressionComparer <LineProxy> .Ascending(proxy => proxy))
.ObserveOn(schedulerProvider.MainThread)
.Bind(out _data, 100)
.LogChanges(logger, "Bound")
.DisposeMany()
.LogErrors(logger)
.Subscribe();
//monitor matching lines and start index,
Count = searchInfoCollection.All.Select(latest => latest.Count).ForBinding();
CountText = searchInfoCollection.All.Select(latest => $"{latest.Count:##,###} lines").ForBinding();
LatestCount = SearchCollection.Latest.Select(latest => latest.Count).ForBinding();
////track first visible index
var firstIndexMonitor = lineScroller.Lines.Connect()
.Buffer(TimeSpan.FromMilliseconds(25)).FlattenBufferResult()
.ToCollection()
.Select(lines => lines.Count == 0 ? 0 : lines.Select(l => l.Index).Max() - lines.Count + 1)
.ObserveOn(schedulerProvider.MainThread)
.Subscribe(first =>
{
FirstIndex = first;
});
//Create objects required for inline viewing
var isUserDefinedChanged = SearchCollection.WhenValueChanged(sc => sc.Selected)
.Where(selected => selected != null)
.Select(selected => selected.IsUserDefined)
.DistinctUntilChanged()
.Replay(1)
.RefCount();
var showInline = this.WhenValueChanged(vm => vm.ShowInline);
var inlineViewerVisible = isUserDefinedChanged.CombineLatest(showInline, (userDefined, showInlne) => userDefined && showInlne);
CanViewInline = isUserDefinedChanged.ForBinding();
InlineViewerVisible = inlineViewerVisible.ForBinding();
//return an empty line provider unless user is viewing inline - this saves needless trips to the file
var inline = searchInfoCollection.All.CombineLatest(inlineViewerVisible, (index, ud) => ud ? index : EmptyLineProvider.Instance);
InlineViewer = inlineViewerFactory.Create(combinedSearchMetadataCollection, inline, this.WhenValueChanged(vm => vm.SelectedItem));
_cleanUp = new CompositeDisposable(lineScroller,
loader,
firstIndexMonitor,
FileStatus,
Count,
CountText,
LatestCount,
FileSizeText,
CanViewInline,
InlineViewer,
InlineViewerVisible,
SearchCollection,
searchInfoCollection,
searchHints,
SelectionMonitor,
closeOnDeselect,
Disposable.Create(dialogCoordinator.Close),
searchInvoker,
MaximumChars,
_stateMonitor,
combinedSearchMetadataCollection,
horizonalScrollArgs.SetAsComplete(),
_userScrollRequested.SetAsComplete());
}
public TailViewModel([NotNull] ILogger logger,
[NotNull] ISchedulerProvider schedulerProvider,
[NotNull] IEnumerable <IFileWatcher> fileWatcher,
[NotNull] ISelectionMonitor selectionMonitor,
[NotNull] IClipboardHandler clipboardHandler,
[NotNull] ISearchInfoCollection searchInfoCollection,
[NotNull] IInlineViewerFactory inlineViewerFactory,
[NotNull] ISetting <GeneralOptions> generalOptions,
[NotNull] ISearchMetadataCollection searchMetadataCollection,
[NotNull] SearchOptionsViewModel searchOptionsViewModel,
[NotNull] SearchHints searchHints)
{
if (logger == null)
{
throw new ArgumentNullException(nameof(logger));
}
if (schedulerProvider == null)
{
throw new ArgumentNullException(nameof(schedulerProvider));
}
if (fileWatcher == null)
{
throw new ArgumentNullException(nameof(fileWatcher));
}
if (selectionMonitor == null)
{
throw new ArgumentNullException(nameof(selectionMonitor));
}
if (clipboardHandler == null)
{
throw new ArgumentNullException(nameof(clipboardHandler));
}
if (searchInfoCollection == null)
{
throw new ArgumentNullException(nameof(searchInfoCollection));
}
if (inlineViewerFactory == null)
{
throw new ArgumentNullException(nameof(inlineViewerFactory));
}
if (generalOptions == null)
{
throw new ArgumentNullException(nameof(generalOptions));
}
if (searchMetadataCollection == null)
{
throw new ArgumentNullException(nameof(searchMetadataCollection));
}
if (searchOptionsViewModel == null)
{
throw new ArgumentNullException(nameof(searchOptionsViewModel));
}
if (searchHints == null)
{
throw new ArgumentNullException(nameof(searchHints));
}
_stateProvider = new TailViewPersister(this);
var enumerable = fileWatcher as IFileWatcher[] ?? fileWatcher.ToArray();
Names = enumerable.Select(t => t.FullName);
SelectionMonitor = selectionMonitor;
SearchOptions = searchOptionsViewModel;
SearchHints = searchHints;
SearchCollection = new SearchCollection(searchInfoCollection, schedulerProvider);
CopyToClipboardCommand =
new Command(() => clipboardHandler.WriteToClipboard(selectionMonitor.GetSelectedText()));
OpenFileCommand = new Command(() => Process.Start(enumerable[0].FullName));
OpenFolderCommand = new Command(() => Process.Start(enumerable[0].Folder));
UsingDarkTheme = generalOptions.Value
.ObserveOn(schedulerProvider.MainThread)
.Select(options => options.Theme == Theme.Dark)
.ForBinding();
HighlightTail = generalOptions.Value
.ObserveOn(schedulerProvider.MainThread)
.Select(options => options.HighlightTail)
.ForBinding();
HighlightDuration = generalOptions.Value
.ObserveOn(schedulerProvider.MainThread)
.Select(options => new Duration(TimeSpan.FromSeconds(options.HighlightDuration)))
.ForBinding();
//An observable which acts as a scroll command
var autoChanged = this.WhenValueChanged(vm => vm.AutoTail);
var scroller = _userScrollRequested.CombineLatest(autoChanged, (user, auto) =>
{
var mode = AutoTail ? ScrollReason.Tail : ScrollReason.User;
return(new ScrollRequest(mode, user.PageSize, user.FirstIndex));
})
.Do(x => logger.Info("Scrolling to {0}/{1}", x.FirstIndex, x.PageSize))
.DistinctUntilChanged();
FileStatus = enumerable
.Select(t => t.Status)
.Merge()
.Scan(default(FileStatus), (status, fileStatus) => status | fileStatus)
.ForBinding();
//command to add the current search to the tail collection
var searchInvoker =
SearchHints.SearchRequested.Subscribe(
request => { searchInfoCollection.Add(request.Text, request.UseRegEx); });
//User feedback to show file size
FileSizeText = enumerable
.Select(t => t.Latest)
.Merge()
.Select(t => t.Size)
.Scan(0f, (previousSize, currentSize) => previousSize + currentSize / 2f)
.Select(t => ((long)t).FormatWithAbbreviation())
.DistinctUntilChanged()
.ForBinding();
//tailer is the main object used to tail, scroll and filter in a file
var lineScroller = new LineScroller(SearchCollection.Latest.ObserveOn(schedulerProvider.Background),
scroller);
//load lines into observable collection
var lineProxyFactory = new LineProxyFactory(new TextFormatter(searchMetadataCollection),
new LineMatches(searchMetadataCollection));
var loader = lineScroller.Lines.Connect()
.RecordChanges(logger, "Received")
.Transform(lineProxyFactory.Create, new ParallelisationOptions(ParallelType.Ordered, 3))
.Sort(SortExpressionComparer <LineProxy> .Ascending(proxy => proxy))
.ObserveOn(schedulerProvider.MainThread)
.Bind(out _data, 100)
.DisposeMany()
.LogErrors(logger)
.Subscribe();
//monitor matching lines and start index,
Count = searchInfoCollection.All
.GroupBy(t => t)
.Select(groupedProvider => groupedProvider.Key.Count)
.Scan(0, (i, providerCount) => i + providerCount)
.ForBinding();
CountText = searchInfoCollection.All
.GroupBy(t => t)
.Select(groupedProvider => groupedProvider.Key.Count)
.Scan(0, (i, providerCount) => i + providerCount)
.Select(latestCount => $"{latestCount.ToString("##,###")} lines")
.ForBinding();
//iterate over every items to evaluate the lines' count
LatestCount = SearchCollection.Latest
.GroupBy(t => t)
.Do(Console.WriteLine)
.Scan(0, (acc, provider) =>
{
if (provider.Key is IndexCollection && provider.Key.NumberOfPreviousProvider == 0)
{
acc = 0;
}
else if (provider.Key is FileSearchResult && provider.Key.NumberOfPreviousProvider == 0)
{
acc = 0;
}
return(provider.Key.Count + acc);
})
.ForBinding();
////track first visible index
var firstIndexMonitor = lineScroller.Lines.Connect()
.Buffer(TimeSpan.FromMilliseconds(25)).FlattenBufferResult()
.ToCollection()
.Select(lines => lines.Count == 0 ? 0 : lines.Select(l => l.Index).Max() - lines.Count + 1)
.ObserveOn(schedulerProvider.MainThread)
.Subscribe(first => { FirstIndex = first; });
//Create objects required for inline viewing
var isUserDefinedChanged = SearchCollection.WhenValueChanged(sc => sc.Selected)
.Where(selected => selected != null)
.Select(selected => selected.IsUserDefined)
.DistinctUntilChanged()
.Replay(1)
.RefCount();
var inlineViewerVisible = isUserDefinedChanged.CombineLatest(this.WhenValueChanged(vm => vm.ShowInline),
(userDefined, showInline) => userDefined && showInline);
CanViewInline = isUserDefinedChanged.ForBinding();
InlineViewerVisible = inlineViewerVisible.ForBinding();
//return an empty line provider unless user is viewing inline - this saves needless trips to the file
var inline = searchInfoCollection.All.CombineLatest(inlineViewerVisible,
(index, ud) => ud ? index : new EmptyLineProvider());
var firstVisibleRow = _data.ToObservableChangeSet().ToCollection()
.Select(collection => collection.FirstOrDefault());
//var itemToSelect = this.WhenValueChanged(vm => vm.SelectedItem)
// .CombineLatest(firstVisibleRow, (selected, first) => selected ?? first);
////
InlineViewer = inlineViewerFactory.Create(inline, this.WhenValueChanged(vm => vm.SelectedItem),
lineProxyFactory);
_cleanUp = new CompositeDisposable(lineScroller,
loader,
firstIndexMonitor,
FileStatus,
Count,
LatestCount,
FileSizeText,
CanViewInline,
InlineViewer,
InlineViewerVisible,
SearchCollection,
searchInfoCollection,
HighlightTail,
UsingDarkTheme,
searchHints,
searchMetadataCollection,
searchMetadataCollection,
SelectionMonitor,
SearchOptions,
searchInvoker,
_userScrollRequested.SetAsComplete());
}
public FileTailerViewModel([NotNull] ILogger logger,
[NotNull] ISchedulerProvider schedulerProvider,
[NotNull] IFileWatcher fileWatcher,
[NotNull] ISelectionMonitor selectionMonitor,
[NotNull] IClipboardHandler clipboardHandler,
[NotNull] ISearchInfoCollection searchInfoCollection,
[NotNull] IInlineViewerFactory inlineViewerFactory,
[NotNull] ISetting <GeneralOptions> generalOptions,
[NotNull] IRecentSearchCollection recentSearchCollection,
[NotNull] SearchHints searchHints)
{
if (logger == null)
{
throw new ArgumentNullException(nameof(logger));
}
if (schedulerProvider == null)
{
throw new ArgumentNullException(nameof(schedulerProvider));
}
if (fileWatcher == null)
{
throw new ArgumentNullException(nameof(fileWatcher));
}
if (selectionMonitor == null)
{
throw new ArgumentNullException(nameof(selectionMonitor));
}
if (clipboardHandler == null)
{
throw new ArgumentNullException(nameof(clipboardHandler));
}
if (searchInfoCollection == null)
{
throw new ArgumentNullException(nameof(searchInfoCollection));
}
if (inlineViewerFactory == null)
{
throw new ArgumentNullException(nameof(inlineViewerFactory));
}
if (generalOptions == null)
{
throw new ArgumentNullException(nameof(generalOptions));
}
if (searchHints == null)
{
throw new ArgumentNullException(nameof(searchHints));
}
SelectionMonitor = selectionMonitor;
SearchHints = searchHints;
CopyToClipboardCommand = new Command(() => clipboardHandler.WriteToClipboard(selectionMonitor.GetSelectedText()));
SelectedItemsCount = selectionMonitor.Selected.Connect().QueryWhenChanged(collection => collection.Count).ForBinding();
SearchCollection = new SearchCollection(searchInfoCollection, schedulerProvider);
UsingDarkTheme = generalOptions.Value
.ObserveOn(schedulerProvider.MainThread)
.Select(options => options.Theme == Theme.Dark)
.ForBinding();
HighlightTail = generalOptions.Value
.ObserveOn(schedulerProvider.MainThread)
.Select(options => options.HighlightTail)
.ForBinding();
HighlightDuration = generalOptions.Value
.ObserveOn(schedulerProvider.MainThread)
.Select(options => new Duration(TimeSpan.FromSeconds(options.HighlightDuration)))
.ForBinding();
//An observable which acts as a scroll command
var autoChanged = this.WhenValueChanged(vm => vm.AutoTail);
var scroller = _userScrollRequested.CombineLatest(autoChanged, (user, auto) =>
{
var mode = AutoTail ? ScrollReason.Tail : ScrollReason.User;
return(new ScrollRequest(mode, user.PageSize, user.FirstIndex));
})
.ObserveOn(schedulerProvider.Background)
.DistinctUntilChanged();
//tailer is the main object used to tail, scroll and filter in a file
var lineScroller = new LineScroller(SearchCollection.Latest.ObserveOn(schedulerProvider.Background), scroller);
//Add a complete file display [No search info here]
var indexed = fileWatcher.Latest.Index()
.Replay(1).RefCount();
IsLoading = indexed.Take(1).Select(_ => false).StartWith(true).ForBinding();
searchInfoCollection.Add("<All>", indexed, SearchType.All);
//command to add the current search to the tail collection
KeepSearchCommand = new Command(() =>
{
var text = SearchHints.SearchText;
var latest = fileWatcher.Latest
.Search(s => s.Contains(text, StringComparison.OrdinalIgnoreCase))
.Replay(1).RefCount();
searchInfoCollection.Add(text, latest);
recentSearchCollection.Add(new RecentSearch(text));
SearchHints.SearchText = string.Empty;
}, () => SearchHints.SearchText.IsLongerThanOrEqualTo(3));
//User feedback to show file size
FileSizeText = fileWatcher.Latest.Select(fn => fn.Size)
.Select(size => size.FormatWithAbbreviation())
.DistinctUntilChanged()
.ForBinding();
//User feedback to guide them whilst typing
SearchHint = this.WhenValueChanged(vm => vm.SearchHints.SearchText)
.Select(text =>
{
if (string.IsNullOrEmpty(text))
{
return("Type to search");
}
return(text.Length < 3 ? "Enter at least 3 characters" : "Hit enter to search");
}).ForBinding();
//load lines into observable collection
var lineProxyFactory = new LineProxyFactory(new TextFormatter(searchInfoCollection));
var loader = lineScroller.Lines.Connect()
.Transform(lineProxyFactory.Create, new ParallelisationOptions(ParallelType.Ordered, 5))
.Sort(SortExpressionComparer <LineProxy> .Ascending(proxy => proxy))
.ObserveOn(schedulerProvider.MainThread)
.Bind(out _data)
.DisposeMany()
.Subscribe(changes => logger.Info($"Rows changed. {changes.Adds} adds, {changes.Removes} removed"),
ex => logger.Error(ex, "There is a problem with bind data"));
//monitor matching lines and start index,
Count = indexed.Select(latest => latest.Count).ForBinding();
CountText = indexed.Select(latest => $"{latest.Count.ToString("##,###")} lines").ForBinding();
LatestCount = SearchCollection.Latest.Select(latest => latest.Count).ForBinding();
//track first visible index
var firstIndexMonitor = lineScroller.Lines.Connect()
.Buffer(TimeSpan.FromMilliseconds(250)).FlattenBufferResult()
.ToCollection()
.Select(lines => lines.Count == 0 ? 0 : lines.Select(l => l.Index).Max() - lines.Count + 1)
.ObserveOn(schedulerProvider.MainThread)
.Subscribe(first => FirstIndex = first);
//Create objects required for inline viewing
var isUserDefinedChanged = SearchCollection.WhenValueChanged(sc => sc.Selected)
.Select(selected => selected.IsUserDefined)
.DistinctUntilChanged();
var inlineViewerVisible = isUserDefinedChanged.CombineLatest(this.WhenValueChanged(vm => vm.ShowInline),
(userDefined, showInline) => userDefined && showInline);
CanViewInline = isUserDefinedChanged.ForBinding();
InlineViewerVisible = inlineViewerVisible.ForBinding();
//return an empty line provider unless user is viewing inline - this saves needless trips to the file
var inline = indexed.CombineLatest(inlineViewerVisible, (index, ud) => ud ? index : new EmptyLineProvider());
InlineViewer = inlineViewerFactory.Create(inline, this.WhenValueChanged(vm => vm.SelectedItem), lineProxyFactory);
_cleanUp = new CompositeDisposable(lineScroller,
loader,
firstIndexMonitor,
IsLoading,
Count,
LatestCount,
FileSizeText,
SearchHint,
SelectedItemsCount,
CanViewInline,
InlineViewer,
InlineViewerVisible,
SearchCollection,
searchInfoCollection,
HighlightTail,
UsingDarkTheme,
searchHints,
Disposable.Create(() =>
{
_userScrollRequested.OnCompleted();
SelectionMonitor?.Dispose();
}));
}