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1 package org.jruby.demo;
2
3 import java.awt.BorderLayout  ;
4 import java.awt.Color ;
5 import java.awt.Font ;
6 import java.awt.GraphicsEnvironment ;
7 import java.awt.Insets ;
8 import java.io.PipedInputStream ;
9 import java.io.PrintStream ;
10 import java.util.ArrayList ;
11 import java.util.Arrays ;
12
13 import javax.swing.BorderFactory ;
14 import javax.swing.JEditorPane ;
15 import javax.swing.JFrame ;
16 import javax.swing.JScrollPane ;
17 import javax.swing.JTextPane ;
18
19 import org.jruby.Ruby;
20 import org.jruby.RubyInstanceConfig;
21 import org.jruby.internal.runtime.ValueAccessor;
22 import org.jruby.javasupport.JavaUtil;
23 import org.jruby.runtime.builtin.IRubyObject;
24
25 public class IRBConsole extends JFrame {
26 public IRBConsole(String title) {
27 super(title);
28 }
29
30 public static void main(String [] args) {
31 final IRBConsole console = new IRBConsole("JRuby IRB Console");
32 final PipedInputStream pipeIn = new PipedInputStream ();
33
34 console.getContentPane().setLayout(new BorderLayout ());
35 console.setSize(700, 600);
36
37 JEditorPane text = new JTextPane ();
38
39 text.setMargin(new Insets (8,8,8,8));
40 text.setCaretColor(new Color (0xa4, 0x00, 0x00));
41 text.setBackground(new Color (0xf2, 0xf2, 0xf2));
42 text.setForeground(new Color (0xa4, 0x00, 0x00));
43 Font font = console.findFont("Monospaced", Font.PLAIN, 14,
44 new String [] {"Monaco", "Andale Mono"});
45
46 text.setFont(font);
47 JScrollPane pane = new JScrollPane ();
48 pane.setViewportView(text);
49 pane.setBorder(BorderFactory.createLineBorder(Color.darkGray));
50 console.getContentPane().add(pane);
51 console.validate();
52
53 final TextAreaReadline tar = new TextAreaReadline(text, " Welcome to the JRuby IRB Console \n\n");
54
55 final RubyInstanceConfig config = new RubyInstanceConfig() {{
56 setInput(pipeIn);
57 setOutput(new PrintStream (tar));
58 setError(new PrintStream (tar));
59 setObjectSpaceEnabled(false);
60 }};
61 final Ruby runtime = Ruby.newInstance(config);
62
63 IRubyObject argumentArray = runtime.newArrayNoCopy(JavaUtil.convertJavaArrayToRuby(runtime, args));
64 runtime.defineGlobalConstant("ARGV", argumentArray);
65 runtime.getGlobalVariables().defineReadonly("$*", new ValueAccessor(argumentArray));
66 runtime.getGlobalVariables().defineReadonly("$$", new ValueAccessor(runtime.newFixnum(System.identityHashCode(runtime))));
67 runtime.getLoadService().init(new ArrayList ());
68
69 tar.hookIntoRuntime(runtime);
70
71 Thread t2 = new Thread () {
72 public void run() {
73 console.setVisible(true);
74 runtime.evalScript("require 'irb'; require 'irb/completion'; IRB.start");
75 }
76 };
77 t2.start();
78
79 try {
80 t2.join();
81 } catch (InterruptedException ie) {
82 }
84
85 System.exit(0);
86 }
87
88 private Font findFont(String otherwise, int style, int size, String [] families) {
89 String [] fonts = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
90 Arrays.sort(fonts);
91 Font font = null;
92 for (int i = 0; i < families.length; i++) {
93 if (Arrays.binarySearch(fonts, families[i]) >= 0) {
94 font = new Font (families[i], style, size);
95 break;
96 }
97 }
98 if (font == null)
99 font = new Font (otherwise, style, size);
100 return font;
101 }
102
103
106 private static final long serialVersionUID = 3746242973444417387L;
107
108 }
109 |
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Java API By Example, From Geeks To Geeks.