com.google.dart.tools.search.internal.ui.CopyToClipboardAction.java Source code

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Here is the source code for com.google.dart.tools.search.internal.ui.CopyToClipboardAction.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.search.internal.ui;

import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.osgi.util.TextProcessor;
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.swt.graphics.Point;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;

import java.util.Collections;
import java.util.Iterator;

public class CopyToClipboardAction extends Action {

    private StructuredViewer fViewer;

    public CopyToClipboardAction() {
        setText(SearchMessages.CopyToClipboardAction_label);
        setToolTipText(SearchMessages.CopyToClipboardAction_tooltip);
        ISharedImages workbenchImages = PlatformUI.getWorkbench().getSharedImages();
        setDisabledImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_COPY_DISABLED));
        setImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_COPY));
        setHoverImageDescriptor(workbenchImages.getImageDescriptor(ISharedImages.IMG_TOOL_COPY));

    }

    public CopyToClipboardAction(StructuredViewer viewer) {
        this();
        Assert.isNotNull(viewer);
        fViewer = viewer;
    }

    /*
     * Implements method from IAction
     */
    @Override
    public void run() {
        Shell shell = SearchPlugin.getActiveWorkbenchShell();
        if (shell == null || fViewer == null) {
            return;
        }

        ILabelProvider labelProvider = (ILabelProvider) fViewer.getLabelProvider();
        String lineDelim = System.getProperty("line.separator"); //$NON-NLS-1$
        StringBuffer buf = new StringBuffer();
        @SuppressWarnings("rawtypes")
        Iterator iter = getSelection();
        while (iter.hasNext()) {
            if (buf.length() > 0) {
                buf.append(lineDelim);
            }
            buf.append(labelProvider.getText(iter.next()));
        }

        if (buf.length() > 0) {
            copyToClipboard(buf.toString(), shell);
        }
    }

    @Override
    public void runWithEvent(Event event) {
        // bugzilla 126062: allow combos and text fields of the view to fill
        // the clipboard
        Shell shell = SearchPlugin.getActiveWorkbenchShell();
        if (shell != null) {
            String sel = null;
            if (event.widget instanceof Combo) {
                Combo combo = (Combo) event.widget;
                sel = combo.getText();
                Point selection = combo.getSelection();
                sel = sel.substring(selection.x, selection.y);
            } else if (event.widget instanceof Text) {
                Text text = (Text) event.widget;
                sel = text.getSelectionText();
            }
            if (sel != null) {
                if (sel.length() > 0) {
                    copyToClipboard(sel, shell);
                }
                return;
            }
        }

        run();
    }

    /**
     * @param viewer The viewer to set.
     */
    public void setViewer(StructuredViewer viewer) {
        fViewer = viewer;
    }

    private void copyToClipboard(Clipboard clipboard, String str, Shell shell) {
        try {
            clipboard.setContents(new String[] { str }, new Transfer[] { TextTransfer.getInstance() });
        } catch (SWTError ex) {
            if (ex.code != DND.ERROR_CANNOT_SET_CLIPBOARD) {
                throw ex;
            }
            String title = SearchMessages.CopyToClipboardAction_error_title;
            String message = SearchMessages.CopyToClipboardAction_error_message;
            if (MessageDialog.openQuestion(shell, title, message)) {
                copyToClipboard(clipboard, str, shell);
            }
        }
    }

    private void copyToClipboard(String text, Shell shell) {
        text = TextProcessor.deprocess(text);
        Clipboard clipboard = new Clipboard(shell.getDisplay());
        try {
            copyToClipboard(clipboard, text, shell);
        } finally {
            clipboard.dispose();
        }
    }

    @SuppressWarnings("rawtypes")
    private Iterator getSelection() {
        ISelection s = fViewer.getSelection();
        if (s instanceof IStructuredSelection) {
            return ((IStructuredSelection) s).iterator();
        }
        return Collections.EMPTY_LIST.iterator();
    }
}