com.google.dart.tools.ui.callhierarchy.OpenLocationAction.java Source code

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Here is the source code for com.google.dart.tools.ui.callhierarchy.OpenLocationAction.java

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/*
 * Copyright (c) 2012, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.dart.tools.ui.callhierarchy;

import com.google.dart.tools.ui.actions.SelectionDispatchAction;
import com.google.dart.tools.ui.internal.callhierarchy.CallLocation;
import com.google.dart.tools.ui.internal.callhierarchy.MethodWrapper;

import org.eclipse.jface.util.OpenStrategy;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.ui.IWorkbenchSite;

import java.util.Iterator;

class OpenLocationAction extends SelectionDispatchAction {
    private CallHierarchyViewPart chvPart;

    public OpenLocationAction(CallHierarchyViewPart part, IWorkbenchSite site) {
        super(site);
        chvPart = part;
        LocationViewer viewer = chvPart.getLocationViewer();
        setText(CallHierarchyMessages.OpenLocationAction_label);
        setToolTipText(CallHierarchyMessages.OpenLocationAction_tooltip);
        setEnabled(!chvPart.getSelection().isEmpty());

        viewer.addSelectionChangedListener(new ISelectionChangedListener() {
            @Override
            public void selectionChanged(SelectionChangedEvent event) {
                setEnabled(!event.getSelection().isEmpty());
            }
        });
    }

    @Override
    public ISelection getSelection() {
        return chvPart.getSelection();
    }

    @Override
    public void run(IStructuredSelection selection) {
        if (!checkEnabled(selection)) {
            return;
        }

        for (Iterator<?> iter = selection.iterator(); iter.hasNext();) {
            boolean noError = CallHierarchyUI.openInEditor(iter.next(), getShell(), OpenStrategy.activateOnOpen());
            if (!noError) {
                return;
            }
        }
    }

    private boolean checkEnabled(IStructuredSelection selection) {
        if (selection.isEmpty()) {
            return false;
        }

        for (Iterator<?> iter = selection.iterator(); iter.hasNext();) {
            Object element = iter.next();

            if (element instanceof MethodWrapper) {
                continue;
            } else if (element instanceof CallLocation) {
                continue;
            }

            return false;
        }

        return true;
    }
}