public void actionPerformed(ActionEvent a) {
String command = a.getActionCommand();
if (command.equals("e")) {
// Log toggle.
if (consoleDisplayed = !consoleDisplayed) {
splitter.add(outputScroll);
splitter.setDividerLocation(.8);
} else {
splitter.remove(outputScroll);
}
} else if (command.equals("k")) {
if (text.getText().contains("class")) {
// This means we should try to compile this as normal.
// Pulls out class name
String code = text.getText();
int firstPos = code.indexOf("class");
int secondPos = code.indexOf("{");
String name = code.substring(firstPos + "class".length() + 1, secondPos).trim();
compileAndRun(name, text.getText());
} else {
// This means we should compile this as a playground.
String code = text.getText();
// Common import statements built-in
String importDump = new String();
importDump +=
("import java.util.*;\n"
+ "import javax.swing.*;\n"
+ "import javax.swing.event.*;\n"
+ "import java.awt.*;\n"
+ "import java.awt.event.*;\n"
+ "import java.io.*;\n");
// Pulls out any "import" statements and appends them to the import dump.
int i = code.indexOf("import");
while (i >= 0) {
String s = code.substring(i, code.indexOf(";", i) + 1);
code = code.replaceFirst(s, "");
importDump += s + "\n";
i = code.indexOf("import", i + 1);
}
// Inject the class header and main method
code =
"//User and auto-imports pre-defined\n"
+ importDump
+ "//Autogenerated class\npublic class Main {\npublic static void main(String[] args) {\n"
+ code
+ "\n}\n}";
compileAndRun("Main", code);
}
}
}
private void updateDisplay() {
// first, set block colours
textView.setBackground(getColour(backgroundColour("text-background-colour")));
textView.setForeground(getColour(foregroundColour("text-foreground-colour")));
textView.setCaretColor(getColour(foregroundColour("text-caret-colour")));
problemsView.setBackground(getColour(backgroundColour("problems-background-colour")));
problemsView.setForeground(getColour(foregroundColour("problems-foreground-colour")));
consoleView.setBackground(getColour(backgroundColour("console-background-colour")));
consoleView.setForeground(getColour(foregroundColour("console-foreground-colour")));
// second, set colours on the code!
java.util.List<Lexer.Token> tokens = Lexer.tokenise(textView.getText(), true);
int pos = 0;
for (Lexer.Token t : tokens) {
int len = t.toString().length();
if (t instanceof Lexer.RightBrace || t instanceof Lexer.LeftBrace) {
highlightArea(pos, len, foregroundColour("text-brace-colour"));
} else if (t instanceof Lexer.Strung) {
highlightArea(pos, len, foregroundColour("text-string-colour"));
} else if (t instanceof Lexer.Comment) {
highlightArea(pos, len, foregroundColour("text-comment-colour"));
} else if (t instanceof Lexer.Quote) {
highlightArea(pos, len, foregroundColour("text-quote-colour"));
} else if (t instanceof Lexer.Comma) {
highlightArea(pos, len, foregroundColour("text-comma-colour"));
} else if (t instanceof Lexer.Identifier) {
highlightArea(pos, len, foregroundColour("text-identifier-colour"));
} else if (t instanceof Lexer.Integer) {
highlightArea(pos, len, foregroundColour("text-integer-colour"));
}
pos += len;
}
}
private boolean checkForSave() {
// build warning message
String message;
if (file == null) {
message = "File has been modified. Save changes?";
} else {
message = "File \"" + file.getName() + "\" has been modified. Save changes?";
}
// show confirm dialog
int r =
JOptionPane.showConfirmDialog(
this,
new JLabel(message),
"Warning!",
JOptionPane.YES_NO_CANCEL_OPTION,
JOptionPane.WARNING_MESSAGE);
if (r == JOptionPane.YES_OPTION) {
// Save File
if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
// write the file
physWriteTextFile(fileChooser.getSelectedFile(), textView.getText());
} else {
// user cancelled save after all
return false;
}
}
return r != JOptionPane.CANCEL_OPTION;
}
public void evaluate() {
try {
// clear problems and console messages
problemsView.setText("");
consoleView.setText("");
// update status view
statusView.setText(" Parsing ...");
tabbedPane.setSelectedIndex(0);
LispExpr root = Parser.parse(textView.getText());
statusView.setText(" Running ...");
tabbedPane.setSelectedIndex(1);
// update run button
runButton.setIcon(stopImage);
runButton.setActionCommand("Stop");
// start run thread
runThread = new RunThread(root);
runThread.start();
} catch (SyntaxError e) {
tabbedPane.setSelectedIndex(0);
System.err.println(
"Syntax Error at " + e.getLine() + ", " + e.getColumn() + " : " + e.getMessage());
} catch (Error e) {
// parsing error
System.err.println(e.getMessage());
statusView.setText(" Errors.");
}
}
public void saveFile() {
if (file == null) {
// first save file, so prompt for name.
saveFileAs();
} else {
// file already named so just write it.
physWriteTextFile(file, textView.getText());
// update status
statusView.setText(" Saved file \"" + file.getName() + "\".");
// reset dirty bit
dirty = false;
}
}
public void saveFileAs() {
// Force user to enter new file name
if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
file = fileChooser.getSelectedFile();
} else {
// user cancelled save after all
return;
}
// file selected, so write it.
physWriteTextFile(file, textView.getText());
// update status
statusView.setText(" Saved file \"" + file.getName() + "\".");
// reset dirty bit
dirty = false;
}
public void prettyPrint() {
try {
// clear old problem messages
problemsView.setText("");
// update status view
statusView.setText(" Parsing ...");
LispExpr root = Parser.parse(textView.getText());
statusView.setText(" Pretty Printing ...");
String newText = PrettyPrinter.prettyPrint(root);
textView.setText(newText);
statusView.setText(" Done.");
} catch (Error e) {
System.err.println(e.getMessage());
statusView.setText(" Errors.");
}
}
// This is used for when the user's code has something wrong.
// This has checks in place to make some more sense of the error messages.
// Internal errors should be logged using println and the progErr font.
private static void logError(String message) {
if (message.contains("Playground$FrameAction")) {
// This is a reflection error, so that means that we have a malformed class or method.
String code = text.getText();
if (!code.startsWith("public class")) {
println(
"Error: You defined a private class. Please use \"public class <classname>\".",
progErr);
} else {
println(
"Error: Malformed method. Make sure your main method is defined as \"public static void main(<any args>)\".",
progErr);
}
} else {
println(message, progErr);
}
}
public void actionPerformed(ActionEvent a) {
// Note that this only works on *nix OSes.
// For windows, get the first character of the action command, cast it to int, and compare
// that on a case-by-case basis.
String command = a.getActionCommand();
if (command.equals("e")) {
// Log toggle.
if (consoleDisplayed = !consoleDisplayed) {
splitter.add(outputScroll);
splitter.setDividerLocation(defaultSliderPosition);
} else {
splitter.remove(outputScroll);
}
} else if (command.equals("r")) {
// Gets the code into a string.
String code = text.getText();
// Marks certain areas as "dirty".
// Dirty areas are places that shouldn't be considered for any keywords,
// including "import", "extend", and so on.
ArrayList<Integer> dirtyBounds = getDirty(code);
if (text.getText().contains("class")) {
// This means we should try to compile this as normal.
// Pulls out class name
int firstPos = code.indexOf("public class");
int secondPos = code.indexOf("{");
String name = code.substring(firstPos + "public class".length() + 1, secondPos).trim();
// Just a safety check to make sure you don't try to modify this program while it's
// running.
if (name.equals("Playground")) {
System.out.println(
"I know what you're doing and I don't approve. I won't even compile that.");
return;
}
compileAndRun(name, code);
} else {
// This means we should compile this as a playground.
// Common import statements built-in
String importDump = new String();
importDump +=
( // "import java.util.*;\n" +
"import javax.swing.*;\n"
+ "import javax.swing.event.*;\n"
+ "import java.awt.*;\n"
+ "import java.awt.event.*;\n"
+ "import java.io.*;\n");
// User-defined or auto-generated methods
String methodDump = new String();
// dirtyBounds.forEach(System.out::println);
// Pulls out any "import" statements and appends them to the import dump.
int i = code.indexOf("import");
while (i >= 0) {
// Ignores comments and string literals
if (isDirty(dirtyBounds, i)) {
i = code.indexOf("import", i + 1);
continue;
}
String s = code.substring(i, code.indexOf(";", i) + 1);
// System.out.println("Found import: " + s);
code = code.replaceFirst(s, "");
importDump += s + "\n";
i = code.indexOf("import", i + 1);
}
// Pulls out methods- these are defined by the keyword "method" until a closing bracket.
/*
i = code.indexOf("method");
while(i >= 0) {
//Ignores comments and string literals
if (isDirty(dirtyBounds, i)) {
i = code.indexOf("method", i+1);
continue;
}
//This scans from the first '{' until the last '}' to pull out the full method declaration.
char temp = 0;
int pos = code.indexOf("{", i+1), count = 1;
if(pos != -1) {
while(++pos < code.length()) {
if (count == 0)
break;
temp = code.charAt(pos);
if (temp == '{')
count++;
if (temp == '}')
count--;
}
} else {
//Missing an opening bracket, so just remove "method" and hope it compiles.
code = code.replaceFirst("method", "");
i = code.indexOf("method", i+1);
continue;
}
String s = code.substring(i, pos);
//System.out.println("Found method: " + s);
code = code.replace(s, "");
methodDump+=(s.replaceFirst("method ", "static ")) + "\n";
i = code.indexOf("method", i+1);
}*/
// Pulls out all methods
i = code.indexOf("(");
while (i >= 0) {
if (isDirty(dirtyBounds, i)) {
i = code.indexOf("(", i + 1);
continue;
}
// Move backwards first
char temp = 0;
int pos = i;
boolean shouldSkip = false;
while (--pos > 0) {
temp = code.charAt(pos);
if (temp == '.') {
shouldSkip = true;
break;
} // This is a method call, ie String.charAt();
if (temp == ';') {
++pos;
break;
} // This is most likely a method declaration, since we had no errors
// If we hit the start of the file, that's probable a method dec. too!
}
if (shouldSkip || isDirty(dirtyBounds, pos)) {
i = code.indexOf("(", i + 1);
continue;
} // If this def. isn't a method or it's in a comment
int start = pos;
temp = 0;
pos = code.indexOf("{", i + 1);
int count = 1;
if (pos != -1) {
while (++pos < code.length()) {
if (count == 0) break;
temp = code.charAt(pos);
if (temp == '{') count++;
if (temp == '}') count--;
}
} else {
i = code.indexOf("(", i + 1);
continue;
}
int end = pos;
String s = code.substring(start, end);
code = code.replace(s, "");
// Just to make it look nicer
s = s.trim();
System.out.println("Found method: " + s);
methodDump += (s + "\n");
i = code.indexOf("(", i + 1);
}
// Inject the class header and main method, imports, and methods
code =
"//User and auto-imports pre-defined\n"
+ importDump
+ "//Autogenerated class\n"
+ "public class Main {\n"
+ "public static void main(String[] args) {\n"
+ code
+ "}\n"
+ methodDump
+ "}";
// Run as normal
compileAndRun("Main", code);
}
} else if (command.equals("k")) {
kill();
} else if (command.equals("o")) {
new OptionFrame(frame);
} else if (command.equals("/")) {
new HelpFrame(frame);
}
}