alloy2b.edu.mit.csail.sdg.alloy4compiler.ast.Browsable Maven / Gradle / Ivy

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/* Alloy Analyzer 4 -- Copyright (c) 2006-2009, Felix Chang
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files
 * (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify,
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package edu.mit.csail.sdg.alloy4compiler.ast;

import java.awt.BorderLayout;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.border.EmptyBorder;
import edu.mit.csail.sdg.alloy4.ConstList;
import edu.mit.csail.sdg.alloy4.Listener;
import edu.mit.csail.sdg.alloy4.OurTree;
import edu.mit.csail.sdg.alloy4.Pos;
import edu.mit.csail.sdg.alloy4.Util;

/** This abstract class represents a node that can be browsed in the graphical parse tree viewer. */

public abstract class Browsable {

   /** Returns a Pos object representing the position of this Expr. */
   public Pos pos() { return Pos.UNKNOWN; }

   /** Returns a Pos object representing the entire span of this Expr and all its subexpressions. */
   public Pos span() { return pos(); }

   /** Returns the description (as HTML) to show for this node. */
   public abstract String getHTML();

   /** Returns a list of subnodes for this node. */
   public abstract List getSubnodes();

   /** Construct a Browsable node with the given HTML description and the given single subnode. */
   public static final Browsable make(final Pos pos, final Pos span, final String html, Browsable subnode) {
      return make(pos, span, html, Util.asList(subnode));
   }

   /** Construct a Browsable node with the given HTML description and the given single subnode. */
   public static final Browsable make(final String html, Browsable subnode) {
      return make(Pos.UNKNOWN, Pos.UNKNOWN, html, Util.asList(subnode));
   }

   /** Construct a Browsable node with the given HTML description and the given 0 or more subnodes. */
   public static final Browsable make(final String html, final List subnodes) {
      return make(Pos.UNKNOWN, Pos.UNKNOWN, html, subnodes);
   }

   /** Construct a Browsable node with the given HTML description and the given 0 or more subnodes. */
   public static final Browsable make(final Pos pos, final Pos span, final String html, final List subnodes) {
      final ConstList constlist = ConstList.make(subnodes);
      return new Browsable() {
         @Override public Pos pos() { return pos; }
         @Override public Pos span() { return span; }
         @Override public String getHTML() { return html; }
         @Override public List getSubnodes() { return constlist; }
      };
   }

   /** Display this node and its subnodes as a tree; if listener!=null, it will receive OurTree.Event.SELECT events when nodes are selected. */
   public final JFrame showAsTree(Listener listener) {
      final OurTree tree = new OurTree(12) {
         private static final long serialVersionUID = 0;
         private final boolean onWindows = Util.onWindows();
         {do_start();}
         @Override public String convertValueToText(Object val, boolean selected, boolean expanded, boolean leaf, int row, boolean focus) {
            String c = ">";
            String x = (val instanceof Browsable) ? ((Browsable)val).getHTML() : Util.encode(String.valueOf(val));
            if (onWindows) c = selected ? " style=\"color:#ffffff;\">" : " style=\"color:#000000;\">";
            return "";
         }
         @Override public List do_ask(Object parent) {
            if (parent instanceof Browsable) return ((Browsable)parent).getSubnodes(); else return new ArrayList();
         }
         @Override public Object do_root() { return Browsable.this; }
      };
      tree.setBorder(new EmptyBorder(3, 3, 3, 3));
      final JScrollPane scr = new JScrollPane(tree, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
      scr.addFocusListener(new FocusListener() {
         public void focusGained(FocusEvent e) { tree.requestFocusInWindow(); }
         public void focusLost(FocusEvent e) { }
      });
      final JFrame x = new JFrame("Parse Tree");
      x.setLayout(new BorderLayout());
      x.add(scr, BorderLayout.CENTER);
      x.pack();
      x.setSize(500, 500);
      x.setLocationRelativeTo(null);
      x.setVisible(true);
      if (listener!=null) tree.listeners.add(listener);
      return x;
   }
}