carisma.ui.eclipse.rcp.ForgetEditorHandler.java Source code

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Here is the source code for carisma.ui.eclipse.rcp.ForgetEditorHandler.java

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/*******************************************************************************
 * Copyright (c) 2011 Software Engineering Institute, TU Dortmund.
 * 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:
 *    {SecSE group} - initial API and implementation and/or initial documentation
 *******************************************************************************/

package carisma.ui.eclipse.rcp;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.HandlerEvent;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorReference;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PlatformUI;

import carisma.core.analysis.Analysis;
import carisma.core.analysis.AnalysisUtil;
import carisma.core.logging.LogLevel;
import carisma.core.logging.Logger;
import carisma.ui.eclipse.editors.AdfEditor;

/**
 * Abstract class for ForgetHandlers.
 */
public abstract class ForgetEditorHandler extends AbstractHandler {
    /**
     * the selected resource.
     */
    private IFile selectedFile;
    /**
     * 
     */
    private boolean alreadyInstalledSelectionListener = false;
    /**
     * the Analysis.
     */
    private Analysis analysis;

    /**
     * @return the selected resource in navigator or editor 
     */
    abstract IFile getSelectedFile();

    /**
     * @return the subclass handler.
     */
    abstract ForgetEditorHandler getHandler();

    /**
     * initialize the listeners.
     */
    abstract void installListener();

    /** Getter for alreadyInstalledSelectionListener.
     * 
     * @return the boolean value of alreadyInstalledSelectionListener.
     */
    public final boolean getAlreadyInstalledSelectionListener() {
        return this.alreadyInstalledSelectionListener;
    }

    /** Setter for alreadyInstalledSelectionListener.
     * 
     * @param newValue the new value for alreadyInstalledSelectionListener.
     */
    public final void setAlreadyInstalledSelectionListener(final boolean newValue) {
        this.alreadyInstalledSelectionListener = newValue;
    }

    /* (non-Javadoc)
     * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
     */
    @Override
    public final Object execute(final ExecutionEvent event) throws ExecutionException {

        this.analysis = AnalysisUtil.readAnalysis(this.selectedFile.getLocation().toOSString());

        if (this.analysis == null) {
            return null;
        } else if (this.analysis.getSelectedEditorId() == null || this.analysis.getSelectedEditorId().equals("")) {

            Display display = Display.getDefault();
            Shell shell = new Shell(display);
            MessageDialog mDialog = new MessageDialog(shell, "Editor not set", null,
                    "No editor set for this analysis", MessageDialog.ERROR, new String[] { "OK" }, 0);
            mDialog.open();
            return null;
        }
        this.analysis.setSelectedEditorId(null);
        fireHandlerChanged(new HandlerEvent(getHandler(), true, false));
        saveChanges();

        IWorkbenchPage[] pages = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getPages();

        for (IWorkbenchPage page : pages) {
            for (IEditorReference editorRef : page.getEditorReferences()) {
                if (editorRef != null && this.selectedFile.getName().equals(editorRef.getName())
                        && editorRef.getEditor(false) instanceof AdfEditor) {
                    IEditorInput editInput = ((AdfEditor) editorRef.getEditor(false)).getEditorInput();
                    if (editInput.getAdapter(IFile.class) != null) {
                        IFile file = editInput.getAdapter(IFile.class);
                        this.analysis = AnalysisUtil.readAnalysis(file.getLocation().toOSString());
                    }
                }
            }
        }

        return null;

    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
     */
    /**
     * @return enabled, if the analysis has an saved editor name
     */
    @Override
    public final boolean isEnabled() {
        this.selectedFile = getSelectedFile();
        if (this.selectedFile != null) {
            Analysis analysis = AnalysisUtil.readAnalysis(this.selectedFile.getLocation().toOSString());
            if (analysis.getSelectedEditorId() == null || "".equals(analysis.getSelectedEditorId())) {
                setBaseEnabled(false);
                return false;
            }
            setBaseEnabled(true);
            return true;
        }
        return false;
    }

    @Override
    public final void setEnabled(final Object evaluationContext) {
        installListener();
    }

    /**
     * save changes to resource.
     */
    private void saveChanges() {
        if (this.selectedFile == null) {
            // TODO
            return;
        }
        Display display = Display.getDefault();
        Shell shell = new Shell(display);
        MessageDialog mDialog = new MessageDialog(shell, "Save and Launch", null,
                "Do you want to save the changes in" + this.selectedFile.getLocation().toOSString() + "?", 0,
                new String[] { "OK", "Cancel" }, 0);
        mDialog.open();

        if (mDialog.getReturnCode() == 0) { // save analysis
            AnalysisUtil.storeAnalysis(this.analysis, this.selectedFile.getLocation().toOSString());
            // refresh resource

            try {
                this.selectedFile.refreshLocal(IResource.DEPTH_ZERO, null);
            } catch (CoreException e) {
                Logger.log(LogLevel.INFO, "Could not refresh resource");

            }
        }
    }
}