@Override
public void evaluateExpression(String expression, IWatchExpressionListener listener) {
// TODO(devoncarew): implement this when the command-line debugger supports expression
// evaluation
listener.watchEvaluationFinished(WatchExpressionResult.noOp(expression));
}
public void evaluateExpression(
final String expression,
final IDebugElement context,
final IWatchExpressionListener listener) {
final DebugElementImpl contextImpl = (DebugElementImpl) context;
if (!contextImpl.getDebugTarget().isSuspended()) {
// can only evaluate while suspended. Notify empty result.
listener.watchEvaluationFinished(
new IWatchExpressionResult() {
public String[] getErrorMessages() {
return EMPTY_STRINGS;
}
public DebugException getException() {
return null;
}
public String getExpressionText() {
return expression;
}
public IValue getValue() {
return null;
}
public boolean hasErrors() {
return false;
}
});
return;
}
final EvaluateContext evaluateContext =
(EvaluateContext) contextImpl.getAdapter(EvaluateContext.class);
if (evaluateContext == null) {
listener.watchEvaluationFinished(
new BadWatchExpressionResult(
new DebugException(
new Status(
Status.ERROR,
ChromiumDebugUIPlugin.PLUGIN_ID,
"Bad debug context")), //$NON-NLS-1$
expression));
return;
}
evaluateContext
.getJsEvaluateContext()
.evaluateAsync(
expression,
null,
new JsEvaluateContext.EvaluateCallback() {
@Override
public void success(ResultOrException result) {
ValueBase valueBase =
result.accept(
new ResultOrException.Visitor<ValueBase>() {
@Override
public ValueBase visitResult(JsValue value) {
return Value.create(
evaluateContext,
value,
ExpressionTracker.createExpressionNode(expression));
}
@Override
public ValueBase visitException(JsValue exception) {
return new ValueBase.ErrorMessageValue(
evaluateContext, "<abnormal return>", exception);
}
});
listener.watchEvaluationFinished(
new GoodWatchExpressionResult(valueBase, expression));
}
@Override
public void failure(Exception cause) {
String message = cause.getMessage();
listener.watchEvaluationFinished(
new BadWatchExpressionResult(
new DebugException(
createErrorStatus(
message == null
? Messages.JsWatchExpressionDelegate_ErrorEvaluatingExpression
: message,
null)),
expression));
return;
}
},
null);
}
