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GeezerVison is showing github.com — processing4/java/src/processing/mode/java/ASTViewer.java at main · D-I-R-M/processing4

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package processing.mode.java;
import java.awt.EventQueue;
import java.awt.Rectangle;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.util.ArrayDeque;
import java.util.Deque;
import java.util.function.Consumer;
import javax.swing.JDialog;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.WindowConstants;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.ASTVisitor;
import org.eclipse.jdt.core.dom.CompilationUnit;
import processing.app.Messages;
import processing.app.ui.ZoomTreeCellRenderer;
class ASTViewer {
final JDialog window;
final JTree tree;
final Consumer<PreprocSketch> updateListener;
ASTViewer(JavaEditor editor, PreprocService pps) {
updateListener = this::buildAndUpdateTree;
window = new JDialog(editor);
tree = new JTree() {
@Override
public String convertValueToText(Object value, boolean selected,
boolean expanded, boolean leaf,
int row, boolean hasFocus) {
if (value instanceof DefaultMutableTreeNode) {
DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) value;
Object o = treeNode.getUserObject();
if (o instanceof ASTNode) {
ASTNode node = (ASTNode) o;
return CompletionGenerator.getNodeAsString(node);
}
}
return super.convertValueToText(value, selected, expanded, leaf, row, hasFocus);
}
};
tree.setCellRenderer(new ZoomTreeCellRenderer());
window.addComponentListener(new ComponentAdapter() {
@Override
public void componentHidden(ComponentEvent e) {
pps.unregisterListener(updateListener);
tree.setModel(null);
}
});
window.setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE);
window.setBounds(new Rectangle(680, 100, 460, 620));
window.setTitle("AST View - " + editor.getSketch().getName());
JScrollPane sp = new JScrollPane();
sp.setViewportView(tree);
window.add(sp);
pps.whenDone(updateListener);
pps.registerListener(updateListener);
tree.addTreeSelectionListener(e -> {
if (tree.getLastSelectedPathComponent() != null) {
DefaultMutableTreeNode treeNode =
(DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (treeNode.getUserObject() instanceof ASTNode) {
ASTNode node = (ASTNode) treeNode.getUserObject();
pps.whenDone(ps -> {
SketchInterval si = ps.mapJavaToSketch(node);
if (!ps.inRange(si)) return;
EventQueue.invokeLater(() -> editor.highlight(si.tabIndex, si.startTabOffset, si.stopTabOffset));
});
}
}
});
}
void dispose() {
if (window != null) {
window.dispose();
}
}
// Thread: worker
void buildAndUpdateTree(PreprocSketch ps) {
CompilationUnit cu = ps.compilationUnit;
if (cu.types().isEmpty()){
Messages.err("No Type found in CU");
return;
}
Deque<DefaultMutableTreeNode> treeNodeStack = new ArrayDeque<>();
ASTNode type0 = (ASTNode) cu.types().get(0);
type0.accept(new ASTVisitor() {
@Override
public boolean preVisit2(ASTNode node) {
treeNodeStack.push(new DefaultMutableTreeNode(node));
return super.preVisit2(node);
}
@Override
public void postVisit(ASTNode node) {
if (treeNodeStack.size() > 1) {
DefaultMutableTreeNode treeNode = treeNodeStack.pop();
treeNodeStack.peek().add(treeNode);
}
}
});
DefaultMutableTreeNode codeTree = treeNodeStack.pop();
EventQueue.invokeLater(() -> {
if (tree.hasFocus() || window.hasFocus()) {
return;
}
tree.setModel(new DefaultTreeModel(codeTree));
((DefaultTreeModel) tree.getModel()).reload();
tree.validate();
if (!window.isVisible()) {
window.setVisible(true);
}
});
}
}
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