com.nokia.sdt.component.symbian.actions.VerticalMoveActionDelegate.java Source code

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Here is the source code for com.nokia.sdt.component.symbian.actions.VerticalMoveActionDelegate.java

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/*
* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the License "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: 
*
*/

package com.nokia.sdt.component.symbian.actions;

import com.nokia.sdt.component.symbian.displaymodel.Utilities;
import com.nokia.sdt.datamodel.IDesignerDataModel;
import com.nokia.sdt.datamodel.adapter.IComponentInstance;
import com.nokia.sdt.editor.IComponentEditor;
import com.nokia.sdt.editor.IDesignerEditor;
import com.nokia.sdt.uidesigner.ui.command.DataModelCommandWrapper;
import com.nokia.sdt.uidesigner.ui.utils.EditorUtils;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.draw2d.IFigure;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gef.commands.CommandStack;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;

import java.util.*;

public abstract class VerticalMoveActionDelegate implements IObjectActionDelegate {

    protected EObject object;
    protected IDesignerEditor editor;

    protected abstract boolean isApplicableForDirection(EObject object, EObject[] children);

    protected abstract int getNewInsertPosition(EObject object, EObject[] children);

    public void setActivePart(IAction action, IWorkbenchPart targetPart) {
        editor = (IDesignerEditor) targetPart.getAdapter(IDesignerEditor.class);
    }

    public void run(IAction action) {
        if (object != null) {
            IComponentInstance instance = Utilities.getComponentInstance(object);
            EObject parent = instance.getParent();
            IComponentInstance parentInstance = Utilities.getComponentInstance(parent);
            IDesignerDataModel dataModel = parentInstance.getDesignerDataModel();
            int pos = getNewInsertPosition(object, parentInstance.getChildren());
            org.eclipse.emf.common.command.Command command = dataModel.createMoveComponentInstanceCommand(object,
                    parent, pos);
            CommandStack stack = (CommandStack) editor.getAdapter(CommandStack.class);
            DataModelCommandWrapper commandWrapper = new DataModelCommandWrapper();
            commandWrapper.setDataModelCommand(command);
            stack.execute(commandWrapper);
            refreshTransients(parent);
        }
    }

    private void refreshTransients(EObject parent) {
        if (editor.isTransientMode()) {
            IFigure transientLayer = editor.getTransientLayerRootFigure().getParent();
            transientLayer.repaint();
            Utilities.getLayoutContainer(parent).layoutChildren();
        }
    }

    protected boolean isTemporaryEditor(EObject object) {
        IComponentEditor componentEditor = Utilities.getComponentEditor(object);
        return (componentEditor != null) && componentEditor.isTemporaryObject();
    }

    private EObject[] removeTemporaryObjects(EObject[] children) {
        List<EObject> result = new ArrayList<EObject>();
        List<EObject> temp = Arrays.asList(children);
        for (Iterator<EObject> iter = temp.iterator(); iter.hasNext();) {
            EObject next = iter.next();
            if (!isTemporaryEditor(next))
                result.add(next);
        }
        return (EObject[]) result.toArray(new EObject[result.size()]);
    }

    public void selectionChanged(IAction action, ISelection selection) {
        if (selection instanceof IStructuredSelection) {
            IStructuredSelection structuredSelection = (IStructuredSelection) selection;
            if (structuredSelection.size() == 1) {
                Object firstElement = structuredSelection.getFirstElement();
                if (firstElement instanceof IAdaptable) {
                    IAdaptable adaptable = (IAdaptable) firstElement;
                    IComponentInstance instance = (IComponentInstance) adaptable
                            .getAdapter(IComponentInstance.class);
                    if (instance != null) {
                        EObject object = instance.getEObject();
                        EObject parent = instance.getParent();
                        if (EditorUtils.canReorderChildren(parent,
                                getEObjectListFromSelection(structuredSelection))) {
                            IComponentInstance parentInstance = Utilities.getComponentInstance(parent);
                            EObject[] children = removeTemporaryObjects(parentInstance.getChildren());
                            if (isApplicableForDirection(object, children)) {
                                this.object = object;
                                action.setEnabled(true);
                                return;
                            }
                        }
                    }
                }
            }
        }

        this.object = null;
        action.setEnabled(false);
    }

    private List<EObject> getEObjectListFromSelection(IStructuredSelection structuredSelection) {
        List<EObject> list = new ArrayList<EObject>();
        for (Iterator iterator = structuredSelection.iterator(); iterator.hasNext();) {
            Object next = iterator.next();
            if (next instanceof IAdaptable) {
                IComponentInstance ci = (IComponentInstance) ((IAdaptable) next)
                        .getAdapter(IComponentInstance.class);
                if (ci != null)
                    list.add(ci.getEObject());
            }
        }

        return list;
    }
}