org.eclipse.dltk.tcl.internal.debug.ui.interpreters.TclInterpreterEnvironmentVariablesBlock.java Source code

Introduction

Here is the source code for org.eclipse.dltk.tcl.internal.debug.ui.interpreters.TclInterpreterEnvironmentVariablesBlock.java

Source

/*******************************************************************************
 * Copyright (c) 2000, 2007 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
 *
     
 *******************************************************************************/
package org.eclipse.dltk.tcl.internal.debug.ui.interpreters;

import org.eclipse.dltk.core.environment.IEnvironment;
import org.eclipse.dltk.core.environment.IExecutionEnvironment;
import org.eclipse.dltk.internal.debug.ui.interpreters.AbstractInterpreterEnvironmentVariablesBlock;
import org.eclipse.dltk.internal.debug.ui.interpreters.AddScriptInterpreterDialog;
import org.eclipse.dltk.launching.EnvironmentVariable;
import org.eclipse.dltk.ui.DLTKPluginImages;
import org.eclipse.dltk.ui.viewsupport.ImageDescriptorRegistry;
import org.eclipse.jface.viewers.BaseLabelProvider;
import org.eclipse.jface.viewers.DecoratingLabelProvider;
import org.eclipse.jface.viewers.DecorationOverlayIcon;
import org.eclipse.jface.viewers.IBaseLabelProvider;
import org.eclipse.jface.viewers.IDecoration;
import org.eclipse.jface.viewers.ILabelDecorator;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.swt.graphics.Image;

/**
 * Control used to edit the libraries associated with a Interpreter install
 */
public class TclInterpreterEnvironmentVariablesBlock extends AbstractInterpreterEnvironmentVariablesBlock {

    public TclInterpreterEnvironmentVariablesBlock(AddScriptInterpreterDialog d) {
        super(d);
    }

    @Override
    protected IBaseLabelProvider getLabelProvider() {
        return new DecoratingLabelProvider((ILabelProvider) super.getLabelProvider(),
                new EnvironmentVariableDecorator());
    }

    private class EnvironmentVariableDecorator extends BaseLabelProvider implements ILabelDecorator {

        public Image decorateImage(Image image, Object element) {
            if (element instanceof EnvironmentVariable) {
                final EnvironmentVariable env = (EnvironmentVariable) element;
                if (!isSafe(env) || !env.validate().isOK()) {
                    return registry.get(new DecorationOverlayIcon(image, DLTKPluginImages.DESC_OVR_WARNING,
                            IDecoration.BOTTOM_LEFT));
                }
            }
            return image;
        }

        public String decorateText(String text, Object element) {
            return text;
        }

        @Override
        public void dispose() {
            super.dispose();
            registry.dispose();
        }

        private final ImageDescriptorRegistry registry = new ImageDescriptorRegistry(false);

        private boolean isSafe(EnvironmentVariable env) {
            final IEnvironment environment = getEnvironment();
            if (environment != null) {
                final IExecutionEnvironment execEnvironment = (IExecutionEnvironment) environment
                        .getAdapter(IExecutionEnvironment.class);
                if (execEnvironment != null) {
                    return execEnvironment.isSafeEnvironmentVariable(env.getName());
                }
            }
            return true;
        }

    }
}