Case Study: adding data and statistics

[ifi-stolz-refaktor.git] / case-study / jdt-before / ui / org / eclipse / jdt / internal / ui / callhierarchy / CallHierarchyLabelDecorator.java

diff --git a/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyLabelDecorator.java b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyLabelDecorator.java
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+++ b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyLabelDecorator.java
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+/*******************************************************************************
+ * Copyright (c) 2000, 2008 IBM Corporation and others.
+ * 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:
+ *   Jesper Kamstrup Linnet (eclipse@kamstrup-linnet.dk) - initial API and implementation
+ *          (report 36180: Callers/Callees view)
+ *******************************************************************************/
+package org.eclipse.jdt.internal.ui.callhierarchy;
+
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.Rectangle;
+
+import org.eclipse.jface.resource.ImageDescriptor;
+import org.eclipse.jface.viewers.ILabelDecorator;
+import org.eclipse.jface.viewers.ILabelProviderListener;
+
+import org.eclipse.jdt.internal.corext.callhierarchy.MethodWrapper;
+
+import org.eclipse.jdt.internal.ui.JavaPlugin;
+import org.eclipse.jdt.internal.ui.viewsupport.ImageImageDescriptor;
+
+/**
+ * Label decorator that decorates an method's image with recursion overlays.
+ * The viewer using this decorator is responsible for updating the images on element changes.
+ */
+public class CallHierarchyLabelDecorator implements ILabelDecorator {
+
+    /**
+     * Creates a decorator. The decorator creates an own image registry to cache
+     * images.
+     */
+    public CallHierarchyLabelDecorator() {
+        // Do nothing
+    }
+
+    /* (non-Javadoc)
+     * @see ILabelDecorator#decorateText(String, Object)
+     */
+    public String decorateText(String text, Object element) {
+        return text;
+    }
+
+    /* (non-Javadoc)
+     * @see ILabelDecorator#decorateImage(Image, Object)
+     */
+    public Image decorateImage(Image image, Object element) {
+               if (image == null)
+                       return null;
+
+        int adornmentFlags= computeAdornmentFlags(element);
+        if (adornmentFlags != 0) {
+            ImageDescriptor baseImage= new ImageImageDescriptor(image);
+            Rectangle bounds= image.getBounds();
+            return JavaPlugin.getImageDescriptorRegistry().get(new CallHierarchyImageDescriptor(baseImage, adornmentFlags, new Point(bounds.width, bounds.height)));
+        }
+        return image;
+    }
+
+    /**
+     * Note: This method is for internal use only. Clients should not call this method.
+     *
+        * @param element the element for which to compute the flags
+        * @return the flags
+     */
+    private int computeAdornmentFlags(Object element) {
+        int flags= 0;
+        if (element instanceof MethodWrapper) {
+            MethodWrapper methodWrapper= (MethodWrapper) element;
+            if (methodWrapper.isRecursive()) {
+                flags= CallHierarchyImageDescriptor.RECURSIVE;
+            }
+            if (isMaxCallDepthExceeded(methodWrapper)) {
+                flags|= CallHierarchyImageDescriptor.MAX_LEVEL;
+            }
+        }
+        return flags;
+    }
+
+    private boolean isMaxCallDepthExceeded(MethodWrapper methodWrapper) {
+        return methodWrapper.getLevel() > CallHierarchyUI.getDefault().getMaxCallDepth();
+    }
+
+    /* (non-Javadoc)
+     * @see IBaseLabelProvider#addListener(ILabelProviderListener)
+     */
+    public void addListener(ILabelProviderListener listener) {
+        // Do nothing
+    }
+
+    /* (non-Javadoc)
+     * @see IBaseLabelProvider#dispose()
+     */
+    public void dispose() {
+        // Nothing to dispose
+    }
+
+    /* (non-Javadoc)
+     * @see IBaseLabelProvider#isLabelProperty(Object, String)
+     */
+    public boolean isLabelProperty(Object element, String property) {
+        return true;
+    }
+
+    /* (non-Javadoc)
+     * @see IBaseLabelProvider#removeListener(ILabelProviderListener)
+     */
+    public void removeListener(ILabelProviderListener listener) {
+        // Do nothing
+    }
+}