private static List FindTargetElements()

in src/Microsoft.Xaml.Behaviors/Core/ExtendedVisualStateManager.cs [787:884]
79 lines of code
27 McCabe index (conditional complexity)

        private static List<FrameworkElement> FindTargetElements(FrameworkElement control, FrameworkElement templateRoot, Storyboard layoutStoryboard, List<OriginalLayoutValueRecord> originalValueRecords, List<FrameworkElement> movingElements)
        {
            List<FrameworkElement> targets = new List<FrameworkElement>();

            // Of course, any elements currently in motion need to be inspected
            if (movingElements != null)
            {
                targets.AddRange(movingElements);
            }

            // Also, any element with a layout property being animated
            foreach (Timeline timeline in layoutStoryboard.Children)
            {
                FrameworkElement target = (FrameworkElement)GetTimelineTarget(control, templateRoot, timeline);

                if (target != null)
                {
                    if (!targets.Contains(target))
                    {
                        targets.Add(target);
                    }

                    if (ChildAffectingLayoutProperties.Contains(LayoutPropertyFromTimeline(timeline, false)))
                    {
                        Panel panel = target as Panel;
                        if (panel != null)
                        {
                            foreach (FrameworkElement child in panel.Children)
                            {
                                if (!targets.Contains(child) && !(child is WrapperCanvas))
                                {
                                    targets.Add(child);
                                }
                            }
                        }
                    }
                }
            }

            // and any elements that were animated in previous states
            foreach (OriginalLayoutValueRecord originalValueRecord in originalValueRecords)
            {
                if (!targets.Contains(originalValueRecord.Element))
                {
                    targets.Add(originalValueRecord.Element);
                }

                if (ChildAffectingLayoutProperties.Contains(originalValueRecord.Property))
                {
                    Panel panel = originalValueRecord.Element as Panel;
                    if (panel != null)
                    {
                        foreach (FrameworkElement child in panel.Children)
                        {
                            if (!targets.Contains(child) && !(child is WrapperCanvas))
                            {
                                targets.Add(child);
                            }
                        }
                    }
                }
            }

            // Now do the expansion. Note that targets.Count increases as we move through the list.
            for (int i = 0; i < targets.Count; i++)
            {
                FrameworkElement target = targets[i];
                FrameworkElement parent = VisualTreeHelper.GetParent(target) as FrameworkElement;

                if (movingElements != null && movingElements.Contains(target) && parent is WrapperCanvas)
                {
                    // If this element is being moved currently, then we've wrapped it in a Canvas.
                    // We don't want to track the Canvas wrapper, so parent up once more.
                    parent = VisualTreeHelper.GetParent(parent) as FrameworkElement;
                }

                // If we found a parent, then we can add that parent and all siblings
                if (parent != null)
                {
                    if (!targets.Contains(parent))
                    {
                        targets.Add(parent);
                    }

                    for (int j = 0; j < VisualTreeHelper.GetChildrenCount(parent); j++)
                    {
                        FrameworkElement sibling = VisualTreeHelper.GetChild(parent, j) as FrameworkElement;

                        if (sibling != null && !targets.Contains(sibling) && !(sibling is WrapperCanvas))
                        {
                            targets.Add(sibling);
                        }
                    }
                }
            }

            return targets;
        }