/**
* If the dragged data is a structured selection, get any IVariables in it and create expressions
* for each of them. Insert the created expressions at the currently selected target or add them
* to the end of the collection if no target is selected.
*
* @param selection Structured selection containing IVariables
* @return whether the drop was successful
*/
private boolean performVariableOrWatchAdaptableDrop(IStructuredSelection selection) {
List expressions = new ArrayList(selection.size());
for (Iterator itr = selection.iterator(); itr.hasNext(); ) {
Object element = itr.next();
String expressionText = createExpressionString(element);
if (expressionText != null) {
IExpression expression = createExpression(expressionText);
if (expression != null) {
expressions.add(expression);
} else {
DebugUIPlugin.log(
new Status(
IStatus.ERROR,
DebugUIPlugin.getUniqueIdentifier(),
"Drop failed. Watch expression could not be created for the text "
+ expressionText)); //$NON-NLS-1$
return false;
}
} else {
return false;
}
}
if (expressions.size() == selection.size()) {
IExpressionManager manager = DebugPlugin.getDefault().getExpressionManager();
if (manager instanceof ExpressionManager) {
IExpression targetExpression = getTargetExpression(getCurrentTarget());
if (targetExpression != null) {
((ExpressionManager) manager)
.insertExpressions(
(IExpression[]) expressions.toArray(new IExpression[expressions.size()]),
targetExpression,
fInsertBefore);
} else {
((ExpressionManager) manager)
.addExpressions(
(IExpression[]) expressions.toArray(new IExpression[expressions.size()]));
}
return true;
}
}
return false;
}
/**
* Performs the drop when text was dragged. Creates a new watch expression from the text. Inserts
* the expression at the currently selected target or adds it to the end of the collection if no
* target is selected.
*
* @param text string to use to create the expression
* @return whether the drop was successful
*/
private boolean performTextDrop(String text) {
IExpression expression = createExpression(text);
if (expression != null) {
IExpressionManager manager = DebugPlugin.getDefault().getExpressionManager();
if (manager instanceof ExpressionManager) {
IExpression targetExpression = getTargetExpression(getCurrentTarget());
if (targetExpression != null) {
((ExpressionManager) manager)
.insertExpressions(new IExpression[] {expression}, targetExpression, fInsertBefore);
} else {
((ExpressionManager) manager).addExpression(expression);
}
return true;
}
}
DebugUIPlugin.log(
new Status(
IStatus.ERROR,
DebugUIPlugin.getUniqueIdentifier(),
"Drop failed. Watch expression could not be created for the text "
+ text)); //$NON-NLS-1$
return false;
}
/**
* Performs the drop when the selection is a collection of IExpressions. Moves the given
* expressions from their original locations to the location of the current target.
*
* @param selection the dragged selection
* @return whether the drop could be completed
*/
private boolean performExpressionDrop(IStructuredSelection selection) {
IExpression targetExpression = getTargetExpression(getCurrentTarget());
if (targetExpression != null) {
IExpression[] expressions = new IExpression[selection.size()];
Object[] selectionElements = selection.toArray();
for (int i = 0; i < selectionElements.length; i++) {
expressions[i] = getTargetExpression(selectionElements[i]);
}
IExpressionManager manager = DebugPlugin.getDefault().getExpressionManager();
if (manager instanceof ExpressionManager) {
((ExpressionManager) manager).moveExpressions(expressions, targetExpression, fInsertBefore);
}
return true;
}
return false;
}