public ElementHierarchyView(
VisualElement documentRootElement,
BuilderSelection selection,
BuilderClassDragger classDragger,
BuilderHierarchyDragger hierarchyDragger,
BuilderExplorerContextMenu contextMenuManipulator,
Action <VisualElement> selectElementCallback,
HighlightOverlayPainter highlightOverlayPainter)
{
m_DocumentRootElement = documentRootElement;
m_Selection = selection;
m_ClassDragger = classDragger;
m_HierarchyDragger = hierarchyDragger;
m_ContextMenuManipulator = contextMenuManipulator;
this.focusable = true;
m_SelectElementCallback = selectElementCallback;
hierarchyHasChanged = true;
m_SearchResultsHightlights = new List <VisualElement>();
this.RegisterCallback <FocusEvent>(e => m_TreeView?.Focus());
// HACK: ListView/TreeView need to clear their selections when clicking on nothing.
this.RegisterCallback <MouseDownEvent>(e =>
{
var leafTarget = e.leafTarget as VisualElement;
if (leafTarget.parent is ScrollView)
{
ClearSelection();
}
});
m_TreeViewHoverOverlay = highlightOverlayPainter;
m_Container = new VisualElement();
m_Container.name = "explorer-container";
m_Container.style.flexGrow = 1;
m_ClassDragger.builderHierarchyRoot = m_Container;
m_HierarchyDragger.builderHierarchyRoot = m_Container;
Add(m_Container);
m_SearchBar = new ElementHierarchySearchBar(this);
Add(m_SearchBar);
// TODO: Hiding for now since search does not work, especially with style class pills.
m_SearchBar.style.display = DisplayStyle.None;
m_ClassPillTemplate = AssetDatabase.LoadAssetAtPath <VisualTreeAsset>(
BuilderConstants.UIBuilderPackagePath + "/BuilderClassPill.uxml");
// Create TreeView.
m_TreeRootItems = new List <ITreeViewItem>();
m_TreeView = new TreeView(m_TreeRootItems, 20, MakeItem, FillItem);
m_TreeView.viewDataKey = "unity-builder-explorer-tree";
m_TreeView.style.flexGrow = 1;
#if UNITY_2020_1_OR_NEWER
m_TreeView.onSelectionChange += OnSelectionChange;
#else
m_TreeView.onSelectionChanged += OnSelectionChange;
#endif
m_Container.Add(m_TreeView);
m_ContextMenuManipulator.RegisterCallbacksOnTarget(m_Container);
}
void FillItem(VisualElement element, ITreeViewItem item)
{
var explorerItem = element as BuilderExplorerItem;
explorerItem.Clear();
// Pre-emptive cleanup.
var row = explorerItem.parent.parent;
row.RemoveFromClassList(BuilderConstants.ExplorerHeaderRowClassName);
row.RemoveFromClassList(BuilderConstants.ExplorerItemHiddenClassName);
// Get target element (in the document).
var documentElement = (item as TreeViewItem <VisualElement>).data;
documentElement.SetProperty(BuilderConstants.ElementLinkedExplorerItemVEPropertyName, explorerItem);
explorerItem.userData = documentElement;
row.userData = documentElement;
// If we have a FillItem callback (override), we call it and stop creating the rest of the item.
var fillItemCallback =
documentElement.GetProperty(BuilderConstants.ExplorerItemFillItemCallbackVEPropertyName) as Action <VisualElement, ITreeViewItem, BuilderSelection>;
if (fillItemCallback != null)
{
fillItemCallback(explorerItem, item, m_Selection);
return;
}
// Create main label container.
var labelCont = new VisualElement();
labelCont.AddToClassList(BuilderConstants.ExplorerItemLabelContClassName);
explorerItem.Add(labelCont);
if (BuilderSharedStyles.IsSelectorsContainerElement(documentElement))
{
var styleSheetAsset = documentElement.GetStyleSheet();
var styleSheetFileName = AssetDatabase.GetAssetPath(styleSheetAsset);
var styleSheetAssetName = string.IsNullOrEmpty(styleSheetFileName)
? BuilderConstants.ToolbarUnsavedFileDisplayMessage + BuilderConstants.UssExtension
: Path.GetFileName(styleSheetFileName);
var ssLabel = new Label(styleSheetAssetName);
ssLabel.AddToClassList(BuilderConstants.ExplorerItemLabelClassName);
ssLabel.AddToClassList("unity-debugger-tree-item-type");
row.AddToClassList(BuilderConstants.ExplorerHeaderRowClassName);
labelCont.Add(ssLabel);
return;
}
else if (BuilderSharedStyles.IsSelectorElement(documentElement))
{
var selectorParts = BuilderSharedStyles.GetSelectorParts(documentElement);
foreach (var partStr in selectorParts)
{
if (partStr.StartsWith(BuilderConstants.UssSelectorClassNameSymbol))
{
m_ClassPillTemplate.CloneTree(labelCont);
var pill = labelCont.contentContainer.ElementAt(labelCont.childCount - 1);
var pillLabel = pill.Q <Label>("class-name-label");
pill.AddToClassList("unity-debugger-tree-item-pill");
pill.SetProperty(BuilderConstants.ExplorerStyleClassPillClassNameVEPropertyName, partStr);
pill.userData = documentElement;
// Add ellipsis if the class name is too long.
var partStrShortened = BuilderNameUtilities.CapStringLengthAndAddEllipsis(partStr, BuilderConstants.ClassNameInPillMaxLength);
pillLabel.text = partStrShortened;
m_ClassDragger.RegisterCallbacksOnTarget(pill);
}
else if (partStr.StartsWith(BuilderConstants.UssSelectorNameSymbol))
{
var selectorPartLabel = new Label(partStr);
selectorPartLabel.AddToClassList(BuilderConstants.ExplorerItemLabelClassName);
selectorPartLabel.AddToClassList(BuilderConstants.ElementNameClassName);
labelCont.Add(selectorPartLabel);
}
else if (partStr.StartsWith(BuilderConstants.UssSelectorPseudoStateSymbol))
{
var selectorPartLabel = new Label(partStr);
selectorPartLabel.AddToClassList(BuilderConstants.ExplorerItemLabelClassName);
selectorPartLabel.AddToClassList(BuilderConstants.ElementPseudoStateClassName);
labelCont.Add(selectorPartLabel);
}
else if (partStr == BuilderConstants.SingleSpace)
{
var selectorPartLabel = new Label(BuilderConstants.TripleSpace);
selectorPartLabel.AddToClassList(BuilderConstants.ExplorerItemLabelClassName);
selectorPartLabel.AddToClassList(BuilderConstants.ElementTypeClassName);
labelCont.Add(selectorPartLabel);
}
else
{
var selectorPartLabel = new Label(partStr);
selectorPartLabel.AddToClassList(BuilderConstants.ExplorerItemLabelClassName);
selectorPartLabel.AddToClassList(BuilderConstants.ElementTypeClassName);
labelCont.Add(selectorPartLabel);
}
}
// Register right-click events for context menu actions.
m_ContextMenuManipulator.RegisterCallbacksOnTarget(explorerItem);
return;
}
else if (BuilderSharedStyles.IsDocumentElement(documentElement))
{
var uxmlAsset = documentElement.GetVisualTreeAsset();
var uxmlAssetName = string.IsNullOrEmpty(uxmlAsset.name)
? BuilderConstants.ToolbarUnsavedFileDisplayMessage
: uxmlAsset.name;
var ssLabel = new Label(uxmlAssetName + BuilderConstants.UxmlExtension);
ssLabel.AddToClassList(BuilderConstants.ExplorerItemLabelClassName);
ssLabel.AddToClassList("unity-debugger-tree-item-type");
row.AddToClassList(BuilderConstants.ExplorerHeaderRowClassName);
labelCont.Add(ssLabel);
return;
}
// Check if element is inside current document.
if (!documentElement.IsPartOfCurrentDocument())
{
row.AddToClassList(BuilderConstants.ExplorerItemHiddenClassName);
}
// Register drag-and-drop events for reparenting.
m_HierarchyDragger.RegisterCallbacksOnTarget(explorerItem);
// Allow reparenting.
explorerItem.SetProperty(BuilderConstants.ExplorerItemElementLinkVEPropertyName, documentElement);
// Element type label.
if (string.IsNullOrEmpty(documentElement.name) ||
elementInfoVisibilityState.HasFlag(BuilderExplorer.BuilderElementInfoVisibilityState.TypeName))
{
var typeLabel = new Label(documentElement.typeName);
typeLabel.AddToClassList(BuilderConstants.ExplorerItemLabelClassName);
typeLabel.AddToClassList(BuilderConstants.ElementTypeClassName);
labelCont.Add(typeLabel);
}
// Element name label.
var nameLabel = new Label();
nameLabel.AddToClassList(BuilderConstants.ExplorerItemLabelClassName);
nameLabel.AddToClassList("unity-debugger-tree-item-name-label");
nameLabel.AddToClassList(BuilderConstants.ExplorerItemNameLabelClassName);
nameLabel.AddToClassList(BuilderConstants.ElementNameClassName);
if (!string.IsNullOrEmpty(documentElement.name))
{
nameLabel.text = "#" + documentElement.name;
}
labelCont.Add(nameLabel);
// Textfield to rename element in hierarchy.
var renameTextfield = explorerItem.CreateRenamingTextField(documentElement, nameLabel, m_Selection);
labelCont.Add(renameTextfield);
// Add class list.
if (documentElement.classList.Count > 0 && elementInfoVisibilityState.HasFlag(BuilderExplorer.BuilderElementInfoVisibilityState.ClassList))
{
foreach (var ussClass in documentElement.GetClasses())
{
var classLabelCont = new VisualElement();
classLabelCont.AddToClassList(BuilderConstants.ExplorerItemLabelContClassName);
explorerItem.Add(classLabelCont);
var classLabel = new Label("." + ussClass);
classLabel.AddToClassList(BuilderConstants.ExplorerItemLabelClassName);
classLabel.AddToClassList(BuilderConstants.ElementClassNameClassName);
classLabel.AddToClassList("unity-debugger-tree-item-classlist-label");
classLabelCont.Add(classLabel);
}
}
// Show name of uxml file if this element is a TemplateContainer.
var path = documentElement.GetProperty(BuilderConstants.LibraryItemLinkedTemplateContainerPathVEPropertyName) as string;
if (documentElement is TemplateContainer && !string.IsNullOrEmpty(path))
{
var pathStr = Path.GetFileName(path);
var label = new Label(pathStr);
label.AddToClassList(BuilderConstants.ExplorerItemLabelClassName);
label.AddToClassList(BuilderConstants.ElementTypeClassName);
label.AddToClassList("unity-builder-explorer-tree-item-template-path"); // Just make it look a bit shaded.
labelCont.Add(label);
}
// Register right-click events for context menu actions.
m_ContextMenuManipulator.RegisterCallbacksOnTarget(explorerItem);
}