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Version 17 of the Clay Shell program is like the previous version except that a sequence of commands can be chunked for subsequent use. That is, a command can be defined.
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java -jar ".../Clay17.jar" -h 300 -w 700 -c random
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package clay17;
import java.awt.*;
import java.awt.event.*;
import java.util.StringTokenizer;
public class Main {
<<<Just like in the previous version!>>>
}
class ClayFrame extends Frame implements ActionListener {
<<<Just like in the previous version!>>>
}
class Interpreter {
private ClayFrame clayFrame;
private Definition definition = null;
public Interpreter(ClayFrame cf) {
<<<Just like in the previous version!>>>
}
private String[] quotes;
private String[] words;
private void establishWords()
{
<<<Just like in the previous version!>>>
}
private void establishQuotes()
{
<<<Just like in the previous version!>>>
}
public void interpret(String input)
{
<<<Just like in the previous version!>>>
}
public void interpretCommand(String command) {
if ( command.equals("red") ) {
clayFrame.pa().setBackground(Color.red);
} else if ( command.equals("yellow") ) {
clayFrame.pa().setBackground(Color.yellow);
} else if ( command.equals("green") ) {
clayFrame.pa().setBackground(Color.green);
} else if ( command.equals("random") ) {
clayFrame.pa().setBackground(randomColor());
} else if ( command.equals("clear") ) {
clayFrame.ta().setText("");
} else if ( command.equals("clean") ) {
clayFrame.pa().setBackground(Color.white);
} else if ( command.equals("quote") ) {
interpretQuoteCommand();
} else if ( command.equals("word") ) {
interpretWordCommand();
} else if ( command.equals("pause") ) {
pause();
} else if ( command.equals(definition.head()) ) {
interpretSimpleCommandSequence(definition.body());
} else {
clayFrame.ta().append("### Clay error: Unrecognizable command: " + command + "\n");
}
}
private void interpretQuoteCommand() {
<<<Just like in the previous version!>>>
}
private void interpretWordCommand() {
<<<Just like in the previous version!>>>
}
public Color randomColor() {
<<<Just like in the previous version!>>>
}
private boolean isSimpleCommand(String input) {
<<<Just like in the previous version!>>>
}
private boolean identifier(String input) {
<<<Just like in the previous version!>>>
}
private boolean id(String input) {
<<<Just like in the previous version!>>>
}
private boolean isAlphaNumeric(char ch) {
<<<Just like in the previous version!>>>
}
private boolean alpha(char ch) {
<<<Just like in the previous version!>>>
}
private boolean numeric(char ch) {
<<<Just like in the previous version!>>>
}
private void interpretSimpleCommandSequence(String input) {
<<<Just like in the previous version!>>>
}
private boolean isSimpleCommandSequence(String input) {
<<<Just like in the previous version!>>>
}
private void pause() {
<<<Just like in the previous version!>>>
}
private boolean isClayDefinition(String input) {
StringTokenizer st = new StringTokenizer(input);
if ( st.countTokens() < 3 ) {
return false;
} else {
String first = st.nextToken();
String second = st.nextToken();
String rest = rest(st);
return identifier(first) &
second.equals("=") &
isSimpleCommandSequence(rest);
}
}
private void interpretClayDefinition(String input) {
StringTokenizer st = new StringTokenizer(input);
String head = st.nextToken();
String eqsign = st.nextToken();
String body = rest(st);
definition = new Definition(head,body);
}
private String rest(StringTokenizer st) {
String result = "";
while ( st.hasMoreTokens() ) {
result = result + " " + st.nextToken();
}
return result;
}
}
class Definition {
private String head;
private String body;
public Definition(String head, String body) {
this.head = head;
this.body = body;
}
public String toString() {
return head + " = " + body;
}
public String head() {
return head;
}
public String body() {
return body;
}
}
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