public static String putVal(String name, String val, Document doc, Map<String, Object> locals) {
String ns = null;
int inx = name.indexOf('.');
if (inx != -1) {
ns = name.substring(0, inx);
name = name.substring(inx + 1);
}
if (val == null || val.length() == 0) {
// removeAttr
if ("pref".equals(ns)) Multivalent.getInstance().removePreference(name);
else if ("doc".equals(ns)) doc.removeAttr(name);
else locals.remove(name);
} else {
val = getVal(val, doc, locals);
if ("pref".equals(ns)) Multivalent.getInstance().putPreference(name, val);
else if ("doc".equals(ns)) doc.putAttr(name, val);
else locals.put(name, val);
}
return val;
}
public static String getVar(String name, Document doc, Map<String, Object> locals) {
String ns = null;
String val;
int inx = name.indexOf('.');
if (inx != -1) {
ns = name.substring(0, inx);
name = name.substring(inx + 1);
}
if ("pref".equals(ns)) val = Multivalent.getInstance().getPreference(name, null);
else if ("doc".equals(ns)) val = doc.getAttr(name);
else val = (String) locals.get(name);
return val != null ? val : "";
}
/** Evaluate an expression, returning result in a String. */
public static String eval(Object expr, Document doc, Map<String, Object> locals, Node node) {
if (expr == null) return null;
String retval = null;
if (expr instanceof AWTEvent) {
doc.getRoot().getBrowser().eventq((AWTEvent) expr);
return null;
}
String[] args = new String[10];
int argcnt = 0;
StringTokenizer cmds = new StringTokenizer((String) expr, ";\n"); // handle null expr?
while (cmds.hasMoreTokens()) {
StringTokenizer tokens = new StringTokenizer(cmds.nextToken(), " \t");
String cmd = tokens.nextToken().toLowerCase().intern();
for (argcnt = 0; tokens.hasMoreTokens(); argcnt++)
args[argcnt] = getVal(tokens.nextToken(), doc, locals);
// System.out.print("script cmd="+cmd); for (int i=0; i<argcnt; i++) System.out.print("
// arg="+args[i]); System.out.println();
if ("get" == cmd || ("set" == cmd && argcnt == 1)) {
// assert(argcnt==1)
retval = getVar(args[0], doc, locals);
} else if ("set" == cmd) {
// assert(argcnt==2)
retval = putVal(args[0], args[1], doc, locals);
} else if ("event" == cmd) {
// assert(argcnt==1 || argcnt==2)
Object cd = (argcnt == 1 ? null : args[1]);
if ("<node>".equals(cd)) cd = node;
if (DEBUG) System.out.println("VScript eval: semanticevent " + args[0] + " " + cd);
doc.getRoot().getBrowser().eventq(args[0], cd);
retval = null;
} // else "unrecognized command"
}
return retval;
}
