private List<INode> getSelectedNodes() {
List<SelectionItem> selections =
mEditor.getCanvasControl().getSelectionManager().getSelections();
List<INode> nodes = new ArrayList<INode>(selections.size());
for (SelectionItem item : selections) {
nodes.add(item.getNode());
}
return nodes;
}
/** Updates the layout contents based on the current selection */
void updateSelection() {
NodeProxy parent = null;
LayoutCanvas canvas = mEditor.getCanvasControl();
SelectionManager selectionManager = canvas.getSelectionManager();
List<SelectionItem> selections = selectionManager.getSelections();
if (selections.size() > 0) {
// TODO: better handle multi-selection -- maybe we should disable it or
// something.
// What if you select children with different parents? Of different types?
// etc.
NodeProxy node = selections.get(0).getNode();
if (node != null && node.getParent() != null) {
parent = (NodeProxy) node.getParent();
}
}
if (parent == null) {
// Show the background's properties
CanvasViewInfo root = canvas.getViewHierarchy().getRoot();
if (root == null) {
return;
}
parent = canvas.getNodeFactory().create(root);
selections = Collections.emptyList();
}
RulesEngine engine = mEditor.getRulesEngine();
List<NodeProxy> selectedNodes = new ArrayList<NodeProxy>();
for (SelectionItem item : selections) {
selectedNodes.add(item.getNode());
}
List<RuleAction> actions = new ArrayList<RuleAction>();
engine.callAddLayoutActions(actions, parent, selectedNodes);
// Place actions in the correct order (the actions may come from different
// rules and should be merged properly via sorting keys)
Collections.sort(actions);
// Add in actions for the child as well, if there is exactly one.
// These are not merged into the parent list of actions; they are appended
// at the end.
int index = -1;
String label = null;
if (selectedNodes.size() == 1) {
List<RuleAction> itemActions = new ArrayList<RuleAction>();
NodeProxy selectedNode = selectedNodes.get(0);
engine.callAddLayoutActions(itemActions, selectedNode, null);
if (itemActions.size() > 0) {
Collections.sort(itemActions);
if (!(itemActions.get(0) instanceof RuleAction.Separator)) {
actions.add(RuleAction.createSeparator(0));
}
label = selectedNode.getStringAttr(ANDROID_URI, ATTR_ID);
if (label != null) {
label = BaseViewRule.stripIdPrefix(label);
index = actions.size();
}
actions.addAll(itemActions);
}
}
if (!updateActions(actions)) {
updateToolbar(actions, index, label);
}
mPrevActions = actions;
}