com.aptana.js.debug.ui.internal.actions.WatchAction.java Source code

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Here is the source code for com.aptana.js.debug.ui.internal.actions.WatchAction.java

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/**
 * Aptana Studio
 * Copyright (c) 2005-2011 by Appcelerator, Inc. All Rights Reserved.
 * Licensed under the terms of the GNU Public License (GPL) v3 (with exceptions).
 * Please see the license.html included with this distribution for details.
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.js.debug.ui.internal.actions;

import java.util.Iterator;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IExpressionManager;
import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.model.IDebugElement;
import org.eclipse.debug.core.model.IVariable;
import org.eclipse.debug.core.model.IWatchExpression;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IViewActionDelegate;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;
import org.eclipse.ui.PartInitException;

import com.aptana.core.logging.IdeLog;
import com.aptana.debug.ui.DebugUiPlugin;
import com.aptana.js.debug.ui.JSDebugUIPlugin;
import com.aptana.ui.util.UIUtils;

/**
 * @author Max Stepanov
 */
public class WatchAction implements IWorkbenchWindowActionDelegate, IEditorActionDelegate, IViewActionDelegate {

    private ISelection fSelection;

    /*
     * @see org.eclipse.ui.IWorkbenchWindowActionDelegate#dispose()
     */
    public void dispose() {
    }

    /*
     * @see org.eclipse.ui.IWorkbenchWindowActionDelegate#init(org.eclipse.ui.IWorkbenchWindow)
     */
    public void init(IWorkbenchWindow window) {
    }

    /*
     * @see org.eclipse.ui.IViewActionDelegate#init(org.eclipse.ui.IViewPart)
     */
    public void init(IViewPart view) {
    }

    /*
     * @see org.eclipse.ui.IEditorActionDelegate#setActiveEditor(org.eclipse.jface.action.IAction,
     * org.eclipse.ui.IEditorPart)
     */
    public void setActiveEditor(IAction action, IEditorPart targetEditor) {
    }

    /*
     * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
     */
    public void run(IAction action) {
        if (fSelection == null) {
            return;
        }
        if (fSelection instanceof IStructuredSelection) {
            for (Object object : ((IStructuredSelection) fSelection).toList()) {
                IVariable variable = (IVariable) object;
                try {
                    createExpression(variable.getName());
                } catch (DebugException e) {
                    DebugUiPlugin.errorDialog(Messages.WatchAction_CreateWatchExpressionFailed, e);
                }
            }
        } else if (fSelection instanceof ITextSelection) {
            String expressionText = ((ITextSelection) fSelection).getText();
            if (expressionText.length() > 0) {
                createExpression(expressionText);
            }
        }
    }

    /*
     * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction,
     * org.eclipse.jface.viewers.ISelection)
     */
    @SuppressWarnings("rawtypes")
    public void selectionChanged(IAction action, ISelection selection) {
        fSelection = null;
        if (!action.isEnabled()) {
            return;
        }
        int enabled = 0;
        int size = -1;
        if (selection instanceof IStructuredSelection) {
            fSelection = selection;
            IStructuredSelection sSelection = (IStructuredSelection) selection;
            size = sSelection.size();
            IExpressionManager manager = DebugPlugin.getDefault().getExpressionManager();
            IVariable variable;
            for (Iterator iterator = sSelection.iterator(); iterator.hasNext();) {
                variable = (IVariable) iterator.next();
                if (manager.hasWatchExpressionDelegate(variable.getModelIdentifier())) {
                    enabled++;
                } else {
                    break;
                }
            }
            if (enabled != size) {
                action.setEnabled(false);
            }
        } else if (selection instanceof ITextSelection) {
            fSelection = selection;
            ITextSelection tSelection = (ITextSelection) selection;
            if (tSelection.getLength() == 0) {
                action.setEnabled(false);
            }
        }
    }

    /*
     * showExpressionsView
     */
    protected void showExpressionsView() {
        IWorkbenchPage page = UIUtils.getActivePage();
        IViewPart part = page.findView(IDebugUIConstants.ID_EXPRESSION_VIEW);
        if (part == null) {
            try {
                page.showView(IDebugUIConstants.ID_EXPRESSION_VIEW);
            } catch (PartInitException e) {
                IdeLog.logError(JSDebugUIPlugin.getDefault(), e);
            }
        } else {
            page.bringToTop(part);
        }

    }

    /*
     * createExpression
     * @param expressionText
     */
    protected void createExpression(String expressionText) {
        IWatchExpression expression;
        expression = DebugPlugin.getDefault().getExpressionManager().newWatchExpression(expressionText);
        DebugPlugin.getDefault().getExpressionManager().addExpression(expression);
        IAdaptable object = DebugUITools.getDebugContext();
        IDebugElement context = null;
        if (object instanceof IDebugElement) {
            context = (IDebugElement) object;
        } else if (object instanceof ILaunch) {
            context = ((ILaunch) object).getDebugTarget();
        }
        expression.setExpressionContext(context);
        showExpressionsView();
    }
}