1 files changed, 212 insertions, 29 deletions

diff --git a/java/com/tigervnc/rfb/Configuration.java b/java/com/tigervnc/rfb/Configuration.java
index f397c85a..de8cfc71 100644
--- a/java/com/tigervnc/rfb/Configuration.java
+++ b/java/com/tigervnc/rfb/Configuration.java
@@ -1,5 +1,6 @@
 /* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
  * Copyright 2004-2005 Cendio AB.
+ * Copyright 2012 Brian P. Hinz
  * 
  * This is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -25,68 +26,250 @@ package com.tigervnc.rfb;
 
 public class Configuration {
 
+  static LogWriter vlog = new LogWriter("Config");
+
+  public enum ConfigurationObject { ConfGlobal, ConfServer, ConfViewer };
+
+  // -=- The Global/server/viewer Configuration objects
+  private static Configuration global_ = null;
+  private static Configuration server_ = null;
+  private static Configuration viewer_ = null;
+
+  public static Configuration global() {
+    if (global_ == null)
+      global_ = new Configuration("Global");
+    return global_;
+  } 
+
+  public static Configuration server() {
+    if (server_ == null)
+      server_ = new Configuration("Server");
+    return server_;
+  } 
+
+  public static Configuration viewer() {
+    if (viewer_ == null)
+      viewer_ = new Configuration("Viewer");
+    return viewer_;
+  } 
+
+  // Enable server/viewer specific parameters
+  public static void enableServerParams() { global().appendConfiguration(server()); }
+  public static void enableViewerParams() { global().appendConfiguration(viewer()); }
+
+  // Append configuration object to this instance.
+  // NOTE: conf instance can be only one configuration object
+  public void appendConfiguration(Configuration conf) {
+    conf._next = _next; _next = conf;
+  }
+
+  // -=- Configuration implementation
+  public Configuration(String name_, Configuration attachToGroup) {
+    name = name_; head = null; _next = null;
+    if (attachToGroup != null) {
+      _next = attachToGroup._next;
+      attachToGroup._next = this;
+    }
+  }
+
+  public Configuration(String name_) {
+    this(name_, null);
+  }
+
+  // - Return the buffer containing the Configuration's name
+  final public String getName() { return name; }
+
+  // - Assignment operator.  For every Parameter in this Configuration's
+  //   group, get()s the corresponding source parameter and copies its
+  //   content.
+  public Configuration assign(Configuration src) {
+    VoidParameter current = head;
+    while (current != null) {
+      VoidParameter srcParam = ((Configuration)src).get(current.getName());
+      if (srcParam != null) {
+        current.immutable = false;
+        String value = srcParam.getValueStr();
+        vlog.debug("operator=("+current.getName()+", "+value+")");
+        current.setParam(value);
+      }
+      current = current._next;
+    }
+    if (_next != null)
+      _next = src;
+    return this;
+  }
+
   // - Set named parameter to value
-  public static boolean setParam(String name, String value) {
-    VoidParameter param = getParam(name);
-    if (param == null) return false;
-    return param.setParam(value);
+  public boolean set(String n, String v, boolean immutable) {
+    return set(n, n.length(), v, immutable);
+  }
+
+  public boolean set(String n, String v) {
+    return set(n, n.length(), v, false);
   }
 
   // - Set parameter to value (separated by "=")
-  public static boolean setParam(String config) {
+  public boolean set(String name, int len,
+                     String val, boolean immutable)
+  {
+    VoidParameter current = head;
+    while (current != null) {
+      if (current.getName().length() == len &&
+          current.getName().equalsIgnoreCase(name.substring(0, len)))
+      {
+        boolean b = current.setParam(val);
+        current.setHasBeenSet(); 
+        if (b && immutable) 
+  	  current.setImmutable();
+        return b;
+      }
+      current = current._next;
+    }
+    return (_next != null) ? _next.set(name, len, val, immutable) : false;
+  }
+
+  // - Set named parameter to value, with name truncated at len
+  boolean set(String config, boolean immutable) {
     boolean hyphen = false;
     if (config.charAt(0) == '-') {
       hyphen = true;
-      if (config.charAt(1) == '-')
-        config = config.substring(2); // allow gnu-style --<option>
-      else
-        config = config.substring(1);
+      config = config.substring(1);
+      if (config.charAt(0) == '-') config = config.substring(1); // allow gnu-style --<option>
     }
     int equal = config.indexOf('=');
-    if (equal != -1) {
-      return setParam(config.substring(0, equal), config.substring(equal+1));
+    if (equal > -1) {
+      return set(config, equal, config.substring(equal+1), immutable);
     } else if (hyphen) {
-      VoidParameter param = getParam(config);
-      if (param == null) return false;
-      return param.setParam();
-    }
-    return false;
+      VoidParameter current = head;
+      while (current != null) {
+        if (current.getName().equalsIgnoreCase(config)) {
+          boolean b = current.setParam();
+  	  current.setHasBeenSet(); 
+          if (b && immutable) 
+  	    current.setImmutable();
+          return b;
+        }
+        current = current._next;
+      }
+    }    
+    return (_next != null) ? _next.set(config, immutable) : false;
+  }
+
+  boolean set(String config) {
+    return set(config, false);
+  }
+
+  // - Container for process-wide Global parameters
+  public static boolean setParam(String param, String value, boolean immutable) {
+    return global().set(param, value, immutable);
+  }
+
+  public static boolean setParam(String param, String value) {
+    return setParam(param, value, false);
+  }
+
+  public static boolean setParam(String config, boolean immutable) { 
+    return global().set(config, immutable);
   }
 
+  public static boolean setParam(String config) { 
+    return setParam(config, false);
+  }
+
+  public static boolean setParam(String name, int len,
+                                 String val, boolean immutable) {
+    return global().set(name, len, val, immutable);
+  }
+
+
   // - Get named parameter
-  public static VoidParameter getParam(String name) {
+  public VoidParameter get(String param)
+  {
     VoidParameter current = head;
     while (current != null) {
-      if (name.equalsIgnoreCase(current.getName()))
+      if (current.getName().equalsIgnoreCase(param))
         return current;
-      current = current.next;
+      current = current._next;
     }
-    return null;
+    return (_next != null) ? _next.get(param) : null;
   }
+  
+  public static VoidParameter getParam(String param) { return global().get(param); }
 
-  public static String listParams() {
-    StringBuffer s = new StringBuffer();
+  public static void listParams(int width, int nameWidth) {
+    global().list(width, nameWidth);
+  }
+  public static void listParams() {
+    listParams(79, 10);
+  }
 
+  public void list(int width, int nameWidth) {
     VoidParameter current = head;
+  
+    System.err.format("%s Parameters:%n", name);
     while (current != null) {
       String def_str = current.getDefaultStr();
-      String desc = current.getDescription();
-      s.append("  "+current.getName()+" - "+desc+" (default="+def_str+")\n");
-      current = current.next;
+      String desc = current.getDescription().trim();
+      String format = "  %-"+nameWidth+"s -";
+      System.err.format(format, current.getName());
+      int column = current.getName().length();
+      if (column < nameWidth) column = nameWidth;
+      column += 4;
+      while (true) {
+        int s = desc.indexOf(' ');
+        int wordLen;
+        if (s > -1) wordLen = s;
+        else wordLen = desc.length();
+  
+        if (column + wordLen + 1 > width) {
+          format = "%n%"+(nameWidth+4)+"s";
+          System.err.format(format, "");
+          column = nameWidth+4;
+        }
+        format = " %"+wordLen+"s";
+        System.err.format(format, desc.substring(0, wordLen));
+        column += wordLen + 1;
+
+        if (s == -1) break;
+        desc = desc.substring(wordLen+1);
+      }
+  
+      if (def_str != null) {
+        if (column + def_str.length() + 11 > width)
+          System.err.format("%n%"+(nameWidth+4)+"s","");
+        System.err.format(" (default=%s)%n",def_str);
+        def_str = null;
+      } else {
+        System.err.format("%n");
+      }
+      current = current._next;
     }
+  
+    if (_next != null)
+      _next.list(width, nameWidth);
+  }
 
-    return s.toString();
+  public void list() {
+    list(79, 10);
   }
 
-  public static void readAppletParams(java.applet.Applet applet) {
+  public void readAppletParams(java.applet.Applet applet) {
     VoidParameter current = head;
     while (current != null) {
       String str = applet.getParameter(current.getName());
       if (str != null)
         current.setParam(str);
-      current = current.next;
+      current = current._next;
     }
   }
 
-  public static VoidParameter head;
+  // Name for this Configuration
+  private String name;
+
+  // - Pointer to first Parameter in this group
+  public VoidParameter head;
+
+  // Pointer to next Configuration in this group
+  public Configuration _next;
+
 }