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/*******************************************************************************
* Copyright (c) 2000, 2013 Matt Conway 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:
* Matt Conway - initial implementation
* IBM Corporation - integration and code cleanup
*******************************************************************************/
package org.eclipse.debug.internal.ui.stringsubstitution;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.variables.IDynamicVariable;
import org.eclipse.core.variables.IDynamicVariableResolver;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.swt.widgets.Shell;
import com.ibm.icu.text.MessageFormat;
/**
* Base implementation for variable resolvers that prompt the user
* for their value.
*/
abstract class PromptingResolver implements IDynamicVariableResolver {
/**
* A hint that helps the user choose their input. If a prompt
* hint is provider the user will be prompted:
* Please input a value for <code>promptHint</code>
*/
protected String promptHint = null;
/**
* The prompt displayed to the user.
*/
protected String dialogMessage = null;
/**
* The default value selected when the prompt is displayed
*/
protected String defaultValue = null;
/**
* The last value chosen by the user for this variable
*/
protected String lastValue = null;
/**
* The result returned from the prompt dialog
*/
protected String dialogResultString = null;
/**
* Presents the user with the appropriate prompt for the variable to be expanded
* and sets the <code>dialogResultString</code> based on the user's selection.
*/
public abstract void prompt();
/**
* Initializes values displayed when the user is prompted. If
* a prompt hint and default value are supplied in the given
* variable value, these are extracted for presentation
*
* @param varValue the value of the variable from which the prompt
* hint and default value will be extracted
*/
protected void setupDialog(String varValue) {
promptHint = null;
defaultValue = null;
dialogResultString = null;
if (varValue != null) {
int idx = varValue.indexOf(':');
if (idx != -1) {
promptHint = varValue.substring(0, idx);
defaultValue = varValue.substring(idx + 1);
} else {
promptHint = varValue;
}
}
if (promptHint != null) {
dialogMessage = MessageFormat.format(StringSubstitutionMessages.PromptExpanderBase_0, new Object[] { promptHint });
} else {
dialogMessage = StringSubstitutionMessages.PromptExpanderBase_1;
}
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.core.stringsubstitution.IContextVariableResolver#resolveValue(org.eclipse.debug.internal.core.stringsubstitution.IContextVariable, java.lang.String)
*/
@Override
public String resolveValue(IDynamicVariable variable, String argument) throws CoreException {
String value = null;
setupDialog(argument);
DebugUIPlugin.getStandardDisplay().syncExec(new Runnable() {
@Override
public void run() {
prompt();
}
});
if (dialogResultString != null) {
value = dialogResultString;
lastValue = dialogResultString;
} else {
// dialogResultString == null means prompt was cancelled
throw new DebugException(new Status(IStatus.CANCEL, DebugUIPlugin.getUniqueIdentifier(), IStatus.CANCEL, MessageFormat.format(StringSubstitutionMessages.PromptingResolver_0, new Object[] { variable.getName() }), null));
}
return value;
}
protected Shell getShell() {
return DebugUIPlugin.getShell();
}
}
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