From dd93f11d91fdc6595c96464bc71406ada58c710b Mon Sep 17 00:00:00 2001
From: Tom Schindl
Date: Tue, 7 Jul 2015 21:42:43 +0200
Subject: add a default outline viewer

---
 .../code/compensator/editor/FileOutlineViewer.java | 101 +++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 experimental/compensator/org.eclipse.fx.code.compensator.editor/src/org/eclipse/fx/code/compensator/editor/FileOutlineViewer.java

(limited to 'experimental')

diff --git a/experimental/compensator/org.eclipse.fx.code.compensator.editor/src/org/eclipse/fx/code/compensator/editor/FileOutlineViewer.java b/experimental/compensator/org.eclipse.fx.code.compensator.editor/src/org/eclipse/fx/code/compensator/editor/FileOutlineViewer.java
new file mode 100644
index 000000000..322f978aa
--- /dev/null
+++ b/experimental/compensator/org.eclipse.fx.code.compensator.editor/src/org/eclipse/fx/code/compensator/editor/FileOutlineViewer.java
@@ -0,0 +1,101 @@
+package org.eclipse.fx.code.compensator.editor;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.WeakHashMap;
+import java.util.stream.Collectors;
+
+import javax.annotation.PostConstruct;
+import javax.inject.Inject;
+import javax.inject.Named;
+
+import org.eclipse.e4.core.di.annotations.Optional;
+import org.eclipse.fx.code.compensator.editor.Outline.OutlineItem;
+import org.eclipse.fx.core.URI;
+import org.eclipse.fx.ui.controls.tree.SimpleTreeCell;
+import org.eclipse.fx.ui.services.resources.GraphicsLoader;
+
+import javafx.collections.ListChangeListener.Change;
+import javafx.scene.control.Label;
+import javafx.scene.control.TreeCell;
+import javafx.scene.control.TreeItem;
+import javafx.scene.control.TreeView;
+import javafx.scene.layout.BorderPane;
+import javafx.scene.layout.HBox;
+
+public class FileOutlineViewer {
+	private final GraphicsLoader nodeProvider;
+	private Map<Outline, TreeView<OutlineItem>> treeCache = new WeakHashMap<>();
+
+	private final BorderPane container;
+
+	@Inject
+	public FileOutlineViewer(BorderPane container, GraphicsLoader nodeProvider) {
+		this.container = container;
+		this.nodeProvider = nodeProvider;
+	}
+
+	@PostConstruct
+	public void initUI() {
+		HBox b = new HBox();
+		b.getStyleClass().add("tool-bar");
+		b.getChildren().add(new Label("Outline", nodeProvider.getGraphicsNode(URI.createPlatformPluginURI("org.eclipse.fx.code.compensator.editor","css/icons/16/outline_co.png"))));
+		container.setTop(b);
+	}
+
+	private TreeView<OutlineItem> createView() {
+		TreeView<OutlineItem> outlineView = new TreeView<>();
+		outlineView.setShowRoot(false);
+		outlineView.setCellFactory(this::createCell);
+		return outlineView;
+	}
+
+	TreeCell<OutlineItem> createCell(TreeView<OutlineItem> param) {
+		return new SimpleTreeCell<OutlineItem>(i -> i.getLabel(), i -> i.getGraphic(), i -> Collections.emptyList());
+	}
+
+	@Inject
+	void updateInput(@Optional @Named("activeOutline") Outline outline) {
+		if( outline != null ) {
+			TreeView<OutlineItem> view = treeCache.get(outline);
+
+			if( view == null ) {
+				view = createView();
+				TreeItem<OutlineItem> root = new TreeItem<>();
+				for( OutlineItem l : outline.getRootItems() ) {
+					root.getChildren().add(createRec(l));
+				}
+				
+				outline.getRootItems().addListener( (Change<? extends OutlineItem> c) -> {
+					while( c.next() ) {
+						if( c.wasAdded() ) {
+							root.getChildren().addAll(
+									c.getAddedSubList().stream()
+										.map(this::createRec)
+										.collect(Collectors.toList()));							
+						}
+						
+						if( c.wasRemoved() ) {
+							root.getChildren().removeIf( t -> c.getRemoved().contains(t.getValue()));	
+						}
+					}
+				});
+				view.setRoot(root);
+				treeCache.put(outline, view);
+			}
+
+			container.setCenter(view);
+		} else {
+			container.setCenter(null);
+		}
+	}
+
+	TreeItem<OutlineItem> createRec(OutlineItem i) {
+		TreeItem<OutlineItem> l = new TreeItem<Outline.OutlineItem>(i);
+		for( OutlineItem c : i.getChildren() ) {
+			l.getChildren().add(createRec(c));
+		}
+
+		return l;
+	}
+}
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