private static IEnumerable <Change> GetAppChanges(ValueChange <AppToken> diff)
{
var ids = new ChangeSet <AppId, AppToken, BookId, BookToken>(diff, diff.Select(app => app.Books));
var result = Enumerable.Empty <Change>();
if (diff.IsChanged(app => app.IsVisible))
{
var newValue = diff.NewValue.IsVisible;
result = result.Concat(Change.SetVisibility(diff.NewValue.Id, newValue));
if (!newValue)
{
return(result); //Don't look for other changes if the app just went invisible.
}
}
if (diff.IsChanged(app => app.IsActive))
{
result = result.Concat(Change.SetActive(diff.NewValue.Id, diff.NewValue.IsActive));
}
result = result.Concat(ids.RemovedChanges)
.Concat(ids.AddedChanges)
.Concat(ids.NestedChanges(GetBookChanges));
return(result);
}
private static IEnumerable <Change> GetBookChanges(ValueChange <BookToken> diff)
{
// Debug.WriteLine($"SessionChangeAnalyzer.GetBookChanges({change})");
var result = Enumerable.Empty <Change>();
if (diff.IsChanged(b => b.IsActive))
{
result = result.Concat(Change.SetActive(diff.NewValue.Id, diff.NewValue.IsActive));
}
if (diff.IsChanged(b => b.IsVisible))
{
result = result.Concat(Change.SetVisibility(diff.NewValue.Id, diff.NewValue.IsVisible));
}
result = result.Concat(GetSheetCollectionChanges(diff)
.Concat(GetWindowCollectionChanges(diff)));
return(result);
}
private static IEnumerable <Change> GetSheetChanges(ValueChange <SheetToken> diff)
{
if (diff.IsChanged(s => s.IsActive))
{
yield return(Change.SetActive(diff.NewValue.Id, diff.NewValue.IsActive));
}
if (diff.IsChanged(s => s.IsVisible))
{
yield return(Change.SetVisibility(diff.NewValue.Id, diff.NewValue.IsVisible));
}
if (diff.IsChanged(s => s.Index))
{
yield return(Change.SheetSetIndex(diff.NewValue.Id, diff.NewValue.Index));
}
if (diff.IsChanged(s => s.TabColor))
{
yield return(Change.SheetTabColor(diff.NewValue.Id, diff.NewValue.TabColor));
}
}
private static IEnumerable <Change> GetWindowChanges(ValueChange <WindowToken> diff)
{
if (diff.IsChanged(s => s.IsActive))
{
yield return(Change.SetActive(diff.NewValue.Id, diff.NewValue.IsActive));
}
if (diff.IsChanged(s => s.State))
{
yield return(Change.WindowSetState(diff.NewValue.Id, diff.NewValue.State));
}
if (diff.IsChanged(s => s.IsVisible))
{
yield return(Change.SetVisibility(diff.NewValue.Id, diff.NewValue.IsVisible));
}
if (diff.IsChanged(s => s.ActiveSheetId))
{
yield return(Change.WindowVisibleSheet(diff.NewValue.Id, diff.NewValue.ActiveSheetId));
}
}