1 files changed, 86 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gre/NodeFactory.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gre/NodeFactory.java
new file mode 100644
index 000000000..b0b9971ba
--- /dev/null
+++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gre/NodeFactory.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Eclipse Public License, Version 1.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.eclipse.org/org/documents/epl-v10.php
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.ide.eclipse.adt.internal.editors.layout.gre;
+
+import com.android.ide.common.api.INode;
+import com.android.ide.eclipse.adt.internal.editors.layout.gle2.CanvasViewInfo;
+import com.android.ide.eclipse.adt.internal.editors.layout.gle2.LayoutCanvas;
+import com.android.ide.eclipse.adt.internal.editors.layout.gle2.SwtUtils;
+import com.android.ide.eclipse.adt.internal.editors.layout.uimodel.UiViewElementNode;
+
+import org.eclipse.swt.graphics.Rectangle;
+
+import java.util.Map;
+import java.util.WeakHashMap;
+
+/**
+ * An object that can create {@link INode} proxies.
+ * This also keeps references to objects already created and tries to reuse them.
+ */
+public class NodeFactory {
+
+    private final Map<UiViewElementNode, NodeProxy> mNodeMap =
+        new WeakHashMap<UiViewElementNode, NodeProxy>();
+    private LayoutCanvas mCanvas;
+
+    public NodeFactory(LayoutCanvas canvas) {
+        mCanvas = canvas;
+    }
+
+    /**
+     * Returns an {@link INode} proxy based on the view key of the given
+     * {@link CanvasViewInfo}. The bounds of the node are set to the canvas view bounds.
+     */
+    public NodeProxy create(CanvasViewInfo canvasViewInfo) {
+        return create(canvasViewInfo.getUiViewNode(), canvasViewInfo.getAbsRect());
+    }
+
+    /**
+     * Returns an {@link INode} proxy based on a given {@link UiViewElementNode} that
+     * is not yet part of the canvas, typically those created by layout rules
+     * when generating new XML.
+     */
+    public NodeProxy create(UiViewElementNode uiNode) {
+        return create(uiNode, null /*bounds*/);
+    }
+
+    public void clear() {
+        mNodeMap.clear();
+    }
+
+    public LayoutCanvas getCanvas() {
+        return mCanvas;
+    }
+
+    //----
+
+    private NodeProxy create(UiViewElementNode uiNode, Rectangle bounds) {
+        NodeProxy proxy = mNodeMap.get(uiNode);
+
+        if (proxy == null) {
+            // Create a new proxy if the key doesn't exist
+            proxy = new NodeProxy(uiNode, bounds, this);
+            mNodeMap.put(uiNode, proxy);
+
+        } else if (bounds != null && !SwtUtils.equals(proxy.getBounds(), bounds)) {
+            // Update the bounds if necessary
+            proxy.setBounds(bounds);
+        }
+
+        return proxy;
+    }
+}