public void LogNavigationPoint(NavigationPoint point, bool transient = false)
{
if (point == null)
{
throw new ArgumentNullException(nameof(point));
}
var item = new NavigationHistoryItem(point);
//if the current node's transient but has been around for a while, consider making it permanent
if (Current == null ||
(currentIsTransient && DateTime.Now.Subtract(Current.Created).TotalMilliseconds > TRANSIENT_TIMEOUT))
{
currentIsTransient = false;
}
//if the current point's transient, always replace it
if (currentIsTransient)
{
//collapse down possible extra point in history
var backOne = history[-1];
if (backOne != null && point.ShouldReplace(backOne.NavigationPoint))
{
// The new node is the same as the last permanent, so we can discard it
history.RemoveCurrent();
currentIsTransient = false;
item.Dispose();
}
else
{
currentIsTransient = transient;
history.ReplaceCurrent(item);
}
}
//if the new point wants to replace the old one, let it
else if (Current != null && !transient && point.ShouldReplace(Current.NavigationPoint))
{
history.ReplaceCurrent(item);
//but in this case, the point should not be transient -- unless the old point was,
//but that's handled earlier
currentIsTransient = false;
}
//final choice: append the the node
//BUT only if the existing current node would not want to replace the new node
else if (Current == null || !Current.NavigationPoint.ShouldReplace(point))
{
history.AddPoint(item);
currentIsTransient = transient;
}
else
{
item.Dispose();
}
OnHistoryChanged();
}
static NavigationHistoryService()
{
IdeApp.Workspace.LastWorkspaceItemClosed += delegate {
history.Clear();
OnHistoryChanged();
};
IdeApp.Workbench.DocumentClosed += delegate(object sender, DocumentEventArgs e) {
ClosedDocumentNavigationPoint point = new ClosedDocumentNavigationPoint(
e.Document.FileName, IdeApp.Workbench.Documents.IndexOf(IdeApp.Workbench.ActiveDocument)
);
NavigationHistoryItem item = new NavigationHistoryItem(point);
closedHistory.AddPoint(item);
OnClosedHistoryChanged();
};
//keep nav points up to date
TextEditorService.LineCountChanged += LineCountChanged;
TextEditorService.LineCountChangesCommitted += CommitCountChanges;
TextEditorService.LineCountChangesReset += ResetCountChanges;
IdeApp.Workspace.FileRenamedInProject += FileRenamed;
IdeApp.Workbench.ActiveDocumentChanged += ActiveDocChanged;
}