New UI for Find command: find-as-you-type.

editor/tools/plugins/com.xored.glance.ui/src/com/xored/glance/ui/controls/tree/TreePath.java

+/*******************************************************************************
+ * Copyright (c) 2012 xored software, Inc. All rights reserved. This program and the accompanying
+ * materials are made available under the terms of the Eclipse Public License v1.0 which accompanies
+ * this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html Contributors:
+ * xored software, Inc. - initial API and implementation (Yuri Strot)
+ ******************************************************************************/
+package com.xored.glance.ui.controls.tree;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.DisposeEvent;
+import org.eclipse.swt.events.DisposeListener;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.TreeItem;
+import org.eclipse.ui.progress.PendingUpdateAdapter;
+
+import com.xored.glance.ui.controls.decor.IPath;
+
+public class TreePath implements IPath {
+
+  protected List<TreeNode> list = new ArrayList<TreeNode>();
+  protected TreeContent content;
+
+  private boolean cancel;
+
+  public TreePath(TreeNode node) {
+    content = node.getRoot();
+    TreeNode cur = node;
+    while (cur != null && cur != content) {
+      list.add(0, cur);
+      cur = cur.parent;
+    }
+  }
+
+  public void select(Composite composite) {
+    Tree tree = (Tree) composite;
+    select(tree.getItems(), 0);
+  }
+
+  public void discardSelection() {
+    this.cancel = true;
+  }
+
+  private void select(final TreeItem[] items, final int index) {
+    if (cancel) {
+      return;
+    }
+    TreeNode node = list.get(index);
+    for (final TreeItem item : items) {
+      if (getNode(item) == node) {
+        final Tree tree = item.getParent();
+        if (index == list.size() - 1) {
+          // After tree item removes tree selection restores
+          // we should set selection after this
+          tree.getDisplay().asyncExec(new Runnable() {
+            public void run() {
+              tree.setSelection(item);
+              tree.showSelection();
+            }
+          });
+        } else {
+          if (!item.getExpanded()) {
+            expand(item);
+          }
+          select(item.getItems(), index + 1);
+        }
+        return;
+      }
+    }
+    if (items.length > 0) {
+      TreeItem item = items[0];
+      final TreeItem parent = item.getParentItem();
+      if (item.getData() instanceof PendingUpdateAdapter) {
+        item.addDisposeListener(new DisposeListener() {
+          public void widgetDisposed(DisposeEvent e) {
+            select(parent.getItems(), index);
+          }
+        });
+      }
+    }
+  }
+
+  private TreeNode getNode(TreeItem item) {
+    TreeCell cell = new TreeCell(item, 0);
+    TreeItemContent itemContent = content.getContent(cell);
+    return itemContent != null ? itemContent.getNode() : null;
+  }
+
+  private void expand(TreeItem item) {
+    Event event = new Event();
+    event.item = item;
+    event.type = SWT.Expand;
+    event.widget = item.getParent();
+    event.display = item.getDisplay();
+    event.widget.notifyListeners(SWT.Expand, event);
+    item.setExpanded(true);
+  }
+
+}