public InlineViewer Create(IObservable <ILineProvider> lineProvider,
IObservable <LineProxy> selectedChanged)
{
var args = new InlineViewerArgs(lineProvider, selectedChanged);
return(_objectProvider.Get <InlineViewer>(new ExplictArg("args", args)));
}
public InlineViewer Create(IObservable<ILineProvider> lineProvider,
IObservable<LineProxy> selectedChanged,
ILineProxyFactory lineProxyFactory)
{
var args = new InlineViewerArgs(lineProvider, selectedChanged, lineProxyFactory);
return _objectProvider.Get<InlineViewer>(new ExplictArg("args", args));
}
public InlineViewer([NotNull] InlineViewerArgs args,
[NotNull] IClipboardHandler clipboardHandler,
[NotNull] ISchedulerProvider schedulerProvider,
[NotNull] ISelectionMonitor selectionMonitor)
{
if (args == null)
{
throw new ArgumentNullException(nameof(args));
}
if (clipboardHandler == null)
{
throw new ArgumentNullException(nameof(clipboardHandler));
}
if (schedulerProvider == null)
{
throw new ArgumentNullException(nameof(schedulerProvider));
}
if (selectionMonitor == null)
{
throw new ArgumentNullException(nameof(selectionMonitor));
}
SelectionMonitor = selectionMonitor;
CopyToClipboardCommand = new Command(() => clipboardHandler.WriteToClipboard(selectionMonitor.GetSelectedText()));
_isSettingScrollPosition = false;
var lineProvider = args.LineProvider;
var selectedChanged = args.SelectedChanged;
var pageSize = this.WhenValueChanged(vm => vm.PageSize);
var scrollSelected = selectedChanged.Where(proxy => proxy != null)
.CombineLatest(lineProvider, pageSize, (proxy, lp, pge) => new ScrollRequest(pge, (int)proxy.Start, true));
var scrollUser = _userScrollRequested
.Where(x => !_isSettingScrollPosition)
.Select(request => new ScrollRequest(ScrollReason.User, request.PageSize, request.FirstIndex));
var scroller = scrollSelected.Merge(scrollUser)
.ObserveOn(schedulerProvider.Background)
.DistinctUntilChanged();
var lineScroller = new LineScroller(lineProvider, scroller);
Count = lineProvider.Select(lp => lp.Count).ForBinding();
//load lines into observable collection
var loader = lineScroller.Lines.Connect()
.Transform(line => new LineProxy(line))
.Sort(SortExpressionComparer <LineProxy> .Ascending(proxy => proxy))
.ObserveOn(schedulerProvider.MainThread)
.Bind(out _data)
.Subscribe();
// track first visible index[required to set scroll extent]
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 =>
{
try
{
_isSettingScrollPosition = true;
FirstIndex = first;
}
finally
{
_isSettingScrollPosition = false;
}
});
_cleanUp = new CompositeDisposable(lineScroller,
loader,
Count,
firstIndexMonitor,
SelectionMonitor,
Disposable.Create(() =>
{
_userScrollRequested.OnCompleted();
}));
}
