[Swift-commit] r2820 - trunk/src/org/griphyn/vdl/karajan/monitor/monitors/ansi/tui

[noreply at svn.ci.uchicago.edu]

Author: hategan
Date: 2009-04-04 16:17:03 -0500 (Sat, 04 Apr 2009)
New Revision: 2820

Added:
   trunk/src/org/griphyn/vdl/karajan/monitor/monitors/ansi/tui/Terminal.java
Log:
added a terminal like thing

Added: trunk/src/org/griphyn/vdl/karajan/monitor/monitors/ansi/tui/Terminal.java
===================================================================
--- trunk/src/org/griphyn/vdl/karajan/monitor/monitors/ansi/tui/Terminal.java	                        (rev 0)
+++ trunk/src/org/griphyn/vdl/karajan/monitor/monitors/ansi/tui/Terminal.java	2009-04-04 21:17:03 UTC (rev 2820)
@@ -0,0 +1,160 @@
+//----------------------------------------------------------------------
+//This code is developed as part of the Java CoG Kit project
+//The terms of the license can be found at http://www.cogkit.org/license
+//This message may not be removed or altered.
+//----------------------------------------------------------------------
+
+/*
+ * Created on Apr 4, 2009
+ */
+package org.griphyn.vdl.karajan.monitor.monitors.ansi.tui;
+
+import java.io.IOException;
+import java.util.LinkedList;
+import java.util.ListIterator;
+
+public class Terminal extends Component {
+    public static final int SCROLLBACK_BUFFER_SIZE = 512;
+    
+    private LinkedList lines;
+    private String prompt;
+    private StringBuffer input;
+    private InputHandler inputHandler;
+    private int end = -1;
+
+    public Terminal() {
+        lines = new LinkedList();
+        bgColor = ANSI.BLACK;
+        fgColor = ANSI.WHITE;
+        prompt = "> ";
+        input = new StringBuffer();
+    }
+
+    protected void draw(ANSIContext context) throws IOException {
+        synchronized (lines) {
+            context.bgColor(bgColor);
+            context.filledRect(sx, sy, width, height);
+            context.fgColor(fgColor);
+            
+            int crt = Math.min(height - 2, lines.size()) + 1;
+            if (end < 0) {
+                context.moveTo(sx, sy + crt);
+                context.text(prompt);
+                context.text(input.toString());
+                context.bgColor(fgColor);
+                context.putChar(' ');
+                context.bgColor(bgColor);
+                context.fgColor(fgColor);
+                crt--;
+            }
+            else {
+                System.out.println();
+            }
+            ListIterator li = lines.listIterator(lines.size());
+            int skip = end;
+            while (li.hasPrevious() && skip > 0) {
+                li.previous();
+                skip--;
+            }
+            while (li.hasPrevious() && crt >= 0) {
+                String line = (String) li.previous();
+                context.moveTo(sx, sy + crt);
+                context.text(line);
+                crt--;
+            }
+        }
+    }
+
+    public String getPrompt() {
+        return prompt;
+    }
+
+    public void setPrompt(String prompt) {
+        this.prompt = prompt;
+    }
+
+    public boolean keyboardEvent(Key key) {
+        if (key.isEnter()) {
+            end = -1;
+            processInput();
+        }
+        else if (key.equals(Key.BACKSPACE)) {
+            end = -1;
+            input.deleteCharAt(input.length() - 1);
+        }
+        else if (key.equals(Key.TAB)) {
+            end = -1;
+            if (inputHandler != null) {
+                int si = input.lastIndexOf(" ");
+                String ac = inputHandler.autoComplete(input.substring(si + 1));
+                if (ac != null) {
+                    input.delete(si + 1, input.length());
+                    input.append(ac);
+                }
+                redraw();
+            }
+        }
+        else if (key.equals(Key.HOME)) {
+            end = lines.size() - height;
+        }
+        else if (key.equals(Key.END)) {
+            end = -1;
+        }
+        else if (key.equals(Key.PGUP)) {
+            end = Math.min(lines.size() - height, end + height);
+        }
+        else if (key.equals(Key.PGDN)) {
+            end -= height;
+        }
+        else {
+            end = -1;
+            input.append(key.getChar());
+        }
+        return true;
+    }
+
+    private void processInput() {
+        String in = input.toString().trim();
+        append(prompt + in);
+        input = new StringBuffer();
+        if (inputHandler != null) {
+            inputHandler.handleInput(in);
+        }
+        else {
+            append("Invalid command: " + in);
+        }
+    }
+
+    public void append(String str) {
+        synchronized (lines) {
+            str = str.replaceAll("\\t", "    ");
+            String[] l = str.split("\\n");
+            for (int i = 0; i < l.length; i++) {
+                while (l[i].length() > width) {
+                    lines.add(l[i].substring(0, width));
+                    l[i] = l[i].substring(width);
+                }
+                lines.add(l[i]);
+            }
+            while (lines.size() > SCROLLBACK_BUFFER_SIZE) {
+                lines.removeFirst();
+            }
+            redraw();
+        }
+    }
+
+    public InputHandler getInputHandler() {
+        return inputHandler;
+    }
+
+    public void setInputHandler(InputHandler inputHandler) {
+        this.inputHandler = inputHandler;
+    }
+
+    public static interface InputHandler {
+        void handleInput(String in);
+
+        String autoComplete(String in);
+    }
+
+}