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/*******************************************************************************
* Copyright (c) 2004, 2015 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.internal.ui.views.memory;
import java.math.BigInteger;
import java.util.ArrayList;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IMemoryBlockManager;
import org.eclipse.debug.core.model.IDebugElement;
import org.eclipse.debug.core.model.IDebugTarget;
import org.eclipse.debug.core.model.IMemoryBlockExtension;
import org.eclipse.debug.core.model.IMemoryBlockRetrieval;
import org.eclipse.debug.internal.core.IInternalDebugCoreConstants;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.progress.UIJob;
/**
* Util class for Memory View
*
* @since 3.0
*/
public class MemoryViewUtil {
public static final int[] ignoreKeyEvents = {
SWT.ARROW_UP, SWT.ARROW_DOWN, SWT.ARROW_LEFT, SWT.ARROW_RIGHT,
SWT.PAGE_UP, SWT.PAGE_DOWN, SWT.HOME, SWT.END, SWT.INSERT, SWT.F1,
SWT.F2, SWT.F3, SWT.F4, SWT.F5, SWT.F6, SWT.F7, SWT.F8, SWT.F9,
SWT.F10, SWT.F11, SWT.F12, SWT.F13, SWT.F14, SWT.F15, SWT.HELP,
SWT.CAPS_LOCK, SWT.NUM_LOCK, SWT.SCROLL_LOCK, SWT.PAUSE, SWT.BREAK,
SWT.PRINT_SCREEN, SWT.ESC, SWT.CTRL, SWT.ALT, SWT.SHIFT };
public static ArrayList<String> MEMORY_BLOCKS_HISTORY = new ArrayList<String>();
/**
* @param selection
* @return true if the given selection is valid for creating a memory block
*/
static public boolean isValidSelection(ISelection selection) {
if (!(selection instanceof IStructuredSelection))
return false;
// only single selection is allowed for this action
if (selection.isEmpty() || ((IStructuredSelection) selection).size() > 1) {
return false;
}
Object elem = ((IStructuredSelection) selection).getFirstElement();
return isValidContext(elem);
}
/**
* @param elem
* @return
*/
public static boolean isValidContext(Object elem) {
// if not debug element
if (!(elem instanceof IAdaptable))
return false;
IMemoryBlockRetrieval memRetrieval = ((IAdaptable) elem).getAdapter(IMemoryBlockRetrieval.class);
IDebugTarget debugTarget = null;
if (elem instanceof IDebugElement) {
debugTarget = ((IDebugElement) elem).getDebugTarget();
} else {
debugTarget = ((IAdaptable) elem).getAdapter(IDebugTarget.class);
}
if (memRetrieval == null) {
// if debug element returns null from getAdapter, assume its debug
// target is going to retrieve memory blocks
memRetrieval = debugTarget;
}
// not valid if the debug target is already terminated
if (debugTarget != null && (debugTarget.isTerminated() || debugTarget.isDisconnected()))
return false;
if (memRetrieval != null && memRetrieval.supportsStorageRetrieval()) {
return true;
}
return false;
}
/**
* Helper function to open an error dialog.
*
* @param title
* @param message
* @param e
*/
static public void openError(final String title, final String message, final Exception e) {
UIJob uiJob = new UIJob("open error") { //$NON-NLS-1$
@Override
public IStatus runInUIThread(IProgressMonitor monitor) {
// open error for the exception
String detail = IInternalDebugCoreConstants.EMPTY_STRING;
if (e != null)
detail = e.getMessage();
Shell shell = DebugUIPlugin.getDefault().getWorkbench().getActiveWorkbenchWindow().getShell();
MessageDialog.openError(shell, title, message + "\n" + detail); //$NON-NLS-1$
return Status.OK_STATUS;
}
};
uiJob.setSystem(true);
uiJob.schedule();
}
static IMemoryBlockManager getMemoryBlockManager() {
return DebugPlugin.getDefault().getMemoryBlockManager();
}
static public boolean isLinuxGTK() {
String ws = Platform.getWS();
return ws.equals(Platform.WS_GTK);
}
/**
* Checks to see if the event is valid for activating cell editing in a view
* tab
*
* @param event
* @return true if the edit event is valid for activating the cell editor
*/
public static boolean isValidEditEvent(int event) {
for (int i = 0; i < MemoryViewUtil.ignoreKeyEvents.length; i++) {
if (event == MemoryViewUtil.ignoreKeyEvents[i])
return false;
}
return true;
}
public static BigInteger alignToBoundary(BigInteger integer, int numberOfUnitsPerLine) {
BigInteger[] result = integer.divideAndRemainder(BigInteger.valueOf(numberOfUnitsPerLine));
integer = integer.subtract(result[1]);
return integer;
}
public static void addHistory(String expression) {
if (!MEMORY_BLOCKS_HISTORY.contains(expression))
MEMORY_BLOCKS_HISTORY.add(0, expression);
if (MEMORY_BLOCKS_HISTORY.size() > 5)
MEMORY_BLOCKS_HISTORY.remove(MEMORY_BLOCKS_HISTORY.size() - 1);
}
public static String[] getHistory() {
return MEMORY_BLOCKS_HISTORY.toArray(new String[MEMORY_BLOCKS_HISTORY.size()]);
}
/**
* Return the memory block retrieval of the given object
*
* @param object
* @return the memory block retrieval of the given object or
* <code>null</code> if no memory block retrieval can be found
*
* Returning null for the memory block retrieval will result in
* errors in operations that follow.
*
* Non-standard debug models must provide a memory block retrieval
* via <code>getAdapter(IMemoryBlockRetrieval.class</code>
*/
public static IMemoryBlockRetrieval getMemoryBlockRetrieval(Object object) {
IMemoryBlockRetrieval retrieval = null;
// if memory block extension, retrieval must be queired throught its
// interface
if (object instanceof IMemoryBlockExtension)
return ((IMemoryBlockExtension) object).getMemoryBlockRetrieval();
// check if the object can adapt to a memory block retrieval
if (object instanceof IAdaptable) {
IAdaptable adaptable = (IAdaptable) object;
retrieval = adaptable.getAdapter(IMemoryBlockRetrieval.class);
}
// if cannot adapt and the object itself is already an
// IMemoryBlockRetrieval, return that.
if (retrieval == null && object instanceof IMemoryBlockRetrieval) {
retrieval = (IMemoryBlockRetrieval) object;
}
// otherewise, default back to the debug target
if (retrieval == null && object instanceof IDebugElement) {
IDebugElement de = (IDebugElement) object;
retrieval = de.getDebugTarget();
}
return retrieval;
}
/**
* Returns the hash code for this object, as an Integer.
* */
public static Integer getHashCode(Object o) {
return Integer.valueOf(o.hashCode());
}
}
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