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/*******************************************************************************
 * Copyright (c) 2004, 2007 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/


package org.eclipse.debug.internal.ui.views.memory.renderings;

import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.model.IMemoryBlock;
import org.eclipse.debug.core.model.IMemoryBlockExtension;
import org.eclipse.debug.internal.core.IInternalDebugCoreConstants;
import org.eclipse.debug.internal.ui.DebugPluginImages;
import org.eclipse.debug.internal.ui.DebugUIMessages;
import org.eclipse.debug.internal.ui.IInternalDebugUIConstants;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.ui.PlatformUI;


/**
 * Toobar Copy View Tab to Clipboard action
 *
 * @since 3.0
 */
public class CopyTableRenderingToClipboardAction extends Action
{
	private final String COLUMN_SEPERATOR = "  "; //$NON-NLS-1$

	protected AbstractBaseTableRendering fRendering;
	protected StructuredViewer fViewer;

	public CopyTableRenderingToClipboardAction(AbstractBaseTableRendering rendering, StructuredViewer viewer)
	{
		super();
		fRendering = rendering;
		fViewer = viewer;
		setText(DebugUIMessages.CopyViewToClipboardAction_title);
		setToolTipText(DebugUIMessages.CopyViewToClipboardAction_tooltip);
		setImageDescriptor(DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_ELCL_COPY_VIEW_TO_CLIPBOARD));
		setHoverImageDescriptor(DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_LCL_COPY_VIEW_TO_CLIPBOARD));
		setDisabledImageDescriptor(DebugPluginImages.getImageDescriptor(IInternalDebugUIConstants.IMG_DLCL_COPY_VIEW_TO_CLIPBOARD));
		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IDebugUIConstants.PLUGIN_ID + ".PrintViewTabContextAction_context"); //$NON-NLS-1$
	}

	protected String concatenateTableAsString(TableItem[] itemList) {
		if (itemList.length == 0) {
			return null;
		}

		StringBuilder tableContents = new StringBuilder();

		Table table = (Table)fViewer.getControl();
		int numColumns = table.getColumnCount();
		ITableLabelProvider labelProvider = (ITableLabelProvider)fViewer.getLabelProvider();
		TableColumn columns[] = table.getColumns();

		// get title of view tab
		String label = fRendering.getLabel();
		tableContents.append(label);
		tableContents.append(System.getProperty("line.separator")); //$NON-NLS-1$
		tableContents.append(COLUMN_SEPERATOR);

		int charsPerByte = fRendering.getNumCharsPerByte();
		if (charsPerByte < 0) {
			charsPerByte = 4;
		}

		//get the column headers and line them up properly
		for (int k=0; k < numColumns; k++) {

			StringBuffer columnLabel = new StringBuffer(columns[k].getText());
			int numBytes = 0;
			int numChars = 0;

			if (k > 0)
			{
				numBytes = fRendering.getBytesPerColumn();
				numChars = numBytes * charsPerByte;
			}
			else
			{
				// special for address column
				IMemoryBlock memBlock = fRendering.getMemoryBlock();
				if (memBlock instanceof IMemoryBlockExtension)
				{
					TableRenderingContentDescriptor descriptor = fRendering.getAdapter(TableRenderingContentDescriptor.class);
					if (descriptor == null)
						{
						try {
							numBytes = ((IMemoryBlockExtension)memBlock).getAddressSize();
						} catch (DebugException e) {
							numBytes = 0;
						}
					} else {
						numBytes = descriptor.getAddressSize();
					}

					// check address size
					if (numBytes <= 0) {
						numBytes = 4;
					}
				}
				else
				{
					numBytes = 4;
				}
				numChars = numBytes*2;

			}

			 while (columnLabel.length() < numChars)
			 {
				 columnLabel.append(" "); //$NON-NLS-1$
			 }

			tableContents.append(columnLabel);
			tableContents.append(COLUMN_SEPERATOR);
		}

		tableContents.append(System.getProperty("line.separator")); //$NON-NLS-1$
		StringBuffer temp;

		//get the column contents from all the rows
		for (int i=0; i < itemList.length; i++) {
			for (int j=0; j < numColumns; j++) {
				tableContents.append(COLUMN_SEPERATOR);

				temp = new StringBuffer(labelProvider.getColumnText(itemList[i].getData(), j));

				if (j>0)
				{
					int numBytes = fRendering.getBytesPerColumn();
					int numChars = numBytes * charsPerByte;
					while (temp.length() < numChars)
					{
						temp.append(" "); //$NON-NLS-1$
					}
				}

				tableContents.append(temp);
			}
			tableContents.append(System.getProperty("line.separator")); //$NON-NLS-1$
		}
		return tableContents.toString();
	}

	@Override
	public void run() {

		if (fRendering == null) {
			return;
		}

		if (! (fViewer.getControl() instanceof Table)) {
			return;
		}

		Table table = (Table)fViewer.getControl();

		if (table == null) {
			return;
		}
		Clipboard clip= null;
		try {
			clip = new Clipboard(table.getDisplay());
			TableItem[] tableItems = table.getItems();
			String tableAsString = new String();
			tableAsString = concatenateTableAsString(tableItems);
			if (!tableAsString.equals(IInternalDebugCoreConstants.EMPTY_STRING)) {
				TextTransfer plainTextTransfer = TextTransfer.getInstance();
				clip.setContents(new Object[] {tableAsString}, new Transfer[] {plainTextTransfer});
			}
		} finally {
			if (clip != null) {
				clip.dispose();
			}
		}
	}
}

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