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/*******************************************************************************
* Copyright (c) 2005, 2015 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
* Bjorn Freeman-Benson - initial API and implementation
* Wind River Systems - added support for IToggleBreakpointsTargetFactory
*******************************************************************************/
package org.eclipse.debug.examples.ui.pda.breakpoints;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.debug.core.model.ILineBreakpoint;
import org.eclipse.debug.examples.core.pda.DebugCorePlugin;
import org.eclipse.debug.examples.core.pda.breakpoints.PDALineBreakpoint;
import org.eclipse.debug.examples.core.pda.breakpoints.PDAWatchpoint;
import org.eclipse.debug.ui.actions.IToggleBreakpointsTargetExtension;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.texteditor.IDocumentProvider;
import org.eclipse.ui.texteditor.ITextEditor;
/**
* Adapter to create breakpoints in PDA files.
*/
public class PDABreakpointAdapter implements IToggleBreakpointsTargetExtension {
@Override
public void toggleLineBreakpoints(IWorkbenchPart part, ISelection selection) throws CoreException {
ITextEditor textEditor = getEditor(part);
if (textEditor != null) {
IResource resource = textEditor.getEditorInput().getAdapter(IResource.class);
ITextSelection textSelection = (ITextSelection) selection;
int lineNumber = textSelection.getStartLine();
IBreakpoint[] breakpoints = DebugPlugin.getDefault().getBreakpointManager().getBreakpoints(DebugCorePlugin.ID_PDA_DEBUG_MODEL);
for (int i = 0; i < breakpoints.length; i++) {
IBreakpoint breakpoint = breakpoints[i];
if (breakpoint instanceof ILineBreakpoint && resource.equals(breakpoint.getMarker().getResource())) {
if (((ILineBreakpoint)breakpoint).getLineNumber() == (lineNumber + 1)) {
// remove
breakpoint.delete();
return;
}
}
}
// create line breakpoint (doc line numbers start at 0)
PDALineBreakpoint lineBreakpoint = new PDALineBreakpoint(resource, lineNumber + 1);
DebugPlugin.getDefault().getBreakpointManager().addBreakpoint(lineBreakpoint);
}
}
@Override
public boolean canToggleLineBreakpoints(IWorkbenchPart part, ISelection selection) {
return getEditor(part) != null;
}
/**
* Returns the editor being used to edit a PDA file, associated with the
* given part, or <code>null</code> if none.
*
* @param part workbench part
* @return the editor being used to edit a PDA file, associated with the
* given part, or <code>null</code> if none
*/
private ITextEditor getEditor(IWorkbenchPart part) {
if (part instanceof ITextEditor) {
ITextEditor editorPart = (ITextEditor) part;
IResource resource = editorPart.getEditorInput().getAdapter(IResource.class);
if (resource != null) {
String extension = resource.getFileExtension();
if (extension != null && extension.equals("pda")) { //$NON-NLS-1$
return editorPart;
}
}
}
return null;
}
@Override
public void toggleMethodBreakpoints(IWorkbenchPart part, ISelection selection) throws CoreException {
}
@Override
public boolean canToggleMethodBreakpoints(IWorkbenchPart part, ISelection selection) {
return false;
}
@Override
public void toggleWatchpoints(IWorkbenchPart part, ISelection selection) throws CoreException {
String[] variableAndFunctionName = getVariableAndFunctionName(part, selection);
if (variableAndFunctionName != null && part instanceof ITextEditor && selection instanceof ITextSelection) {
ITextEditor editorPart = (ITextEditor)part;
int lineNumber = ((ITextSelection)selection).getStartLine();
IResource resource = editorPart.getEditorInput().getAdapter(IResource.class);
String var = variableAndFunctionName[0];
String fcn = variableAndFunctionName[1];
toggleWatchpoint(resource, lineNumber, fcn, var, true, true);
}
}
@Override
public boolean canToggleWatchpoints(IWorkbenchPart part, ISelection selection) {
return getVariableAndFunctionName(part, selection) != null;
}
protected void toggleWatchpoint(IResource resource, int lineNumber, String fcn, String var, boolean access,
boolean modification) throws CoreException
{
// look for existing watchpoint to delete
IBreakpoint[] breakpoints = DebugPlugin.getDefault().getBreakpointManager().getBreakpoints(DebugCorePlugin.ID_PDA_DEBUG_MODEL);
for (int i = 0; i < breakpoints.length; i++) {
IBreakpoint breakpoint = breakpoints[i];
if (breakpoint instanceof PDAWatchpoint && resource.equals(breakpoint.getMarker().getResource())) {
PDAWatchpoint watchpoint = (PDAWatchpoint)breakpoint;
String otherVar = watchpoint.getVariableName();
String otherFcn = watchpoint.getFunctionName();
if (otherVar.equals(var) && otherFcn.equals(fcn)) {
breakpoint.delete();
return;
}
}
}
// create watchpoint
PDAWatchpoint watchpoint = new PDAWatchpoint(resource, lineNumber + 1, fcn, var, access, modification);
DebugPlugin.getDefault().getBreakpointManager().addBreakpoint(watchpoint);
}
/**
* Returns the variable and function names at the current line, or <code>null</code> if none.
*
* @param part text editor
* @param selection text selection
* @return the variable and function names at the current line, or <code>null</code> if none.
* The array has two elements, the first is the variable name, the second is the function name.
*/
protected String[] getVariableAndFunctionName(IWorkbenchPart part, ISelection selection) {
ITextEditor editor = getEditor(part);
if (editor != null && selection instanceof ITextSelection) {
ITextSelection textSelection = (ITextSelection) selection;
IDocumentProvider documentProvider = editor.getDocumentProvider();
try {
documentProvider.connect(this);
IDocument document = documentProvider.getDocument(editor.getEditorInput());
IRegion region = document.getLineInformationOfOffset(textSelection.getOffset());
String string = document.get(region.getOffset(), region.getLength()).trim();
if (string.startsWith("var ")) { //$NON-NLS-1$
String varName = string.substring(4).trim();
String fcnName = getFunctionName(document, varName, document.getLineOfOffset(textSelection.getOffset()));
return new String[] {varName, fcnName};
}
} catch (CoreException e) {
} catch (BadLocationException e) {
} finally {
documentProvider.disconnect(this);
}
}
return null;
}
/**
* Returns the name of the function containing the given variable defined at the given
* line number in the specified document.
*
* @param document PDA source file
* @param varName variable name
* @param line line numbner at which the variable is defined
* @return name of function defining the variable
*/
private String getFunctionName(IDocument document, String varName, int line) {
// This is a simple guess at the function name - look for the labels preceeding
// the variable definition, and then see if there are any 'calls' to that
// label. If none, assumet the variable is in the "_main_" function
String source = document.get();
int lineIndex = line - 1;
while (lineIndex >= 0) {
try {
IRegion information = document.getLineInformation(lineIndex);
String lineText = document.get(information.getOffset(), information.getLength());
if (lineText.startsWith(":")) { //$NON-NLS-1$
String label = lineText.substring(1);
if (source.indexOf("call " + label) >= 0) { //$NON-NLS-1$
return label;
}
}
lineIndex--;
} catch (BadLocationException e) {
}
}
return "_main_"; //$NON-NLS-1$
}
@Override
public void toggleBreakpoints(IWorkbenchPart part, ISelection selection) throws CoreException {
if (canToggleWatchpoints(part, selection)) {
toggleWatchpoints(part, selection);
} else {
toggleLineBreakpoints(part, selection);
}
}
@Override
public boolean canToggleBreakpoints(IWorkbenchPart part, ISelection selection) {
return canToggleLineBreakpoints(part, selection) || canToggleWatchpoints(part, selection);
}
}
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