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

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Here is the source code for com.google.dart.tools.ui.callhierarchy.LocationCopyAction.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.internal.callhierarchy.CallLocation;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.swt.SWTError;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.ui.IViewSite;
import org.eclipse.ui.IWorkbenchCommandConstants;

import java.util.Iterator;

/**
 * Copies the selection from the location viewer.
 */
class LocationCopyAction extends Action {
    private final Clipboard clipboard;
    private final IViewSite viewSite;
    private final LocationViewer locationViewer;

    LocationCopyAction(IViewSite viewSite, Clipboard clipboard, LocationViewer locationViewer) {
        this.clipboard = clipboard;
        this.viewSite = viewSite;
        this.locationViewer = locationViewer;

        setText(CallHierarchyMessages.LocationCopyAction_copy);
        setActionDefinitionId(IWorkbenchCommandConstants.EDIT_COPY);
        setEnabled(!locationViewer.getSelection().isEmpty());

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

    @Override
    public void run() {
        IStructuredSelection selection = (IStructuredSelection) locationViewer.getSelection();
        StringBuffer buf = new StringBuffer();
        for (Iterator<?> iterator = selection.iterator(); iterator.hasNext();) {
            CallLocation location = (CallLocation) iterator.next();
            buf.append(location.getLineNumber()).append('\t').append(location.getCallText());
            buf.append('\n');
        }
        TextTransfer plainTextTransfer = TextTransfer.getInstance();
        try {
            clipboard.setContents(new String[] { CopyCallHierarchyAction.convertLineTerminators(buf.toString()) },
                    new Transfer[] { plainTextTransfer });
        } catch (SWTError e) {
            if (e.code != DND.ERROR_CANNOT_SET_CLIPBOARD) {
                throw e;
            }
            if (MessageDialog.openQuestion(viewSite.getShell(),
                    CallHierarchyMessages.CopyCallHierarchyAction_problem,
                    CallHierarchyMessages.CopyCallHierarchyAction_clipboard_busy)) {
                run();
            }
        }
    }
}