/**
* Will select the Mars Messages tab error message that matches the given specifications, if it is
* found. Matching is done by constructing a string using the parameter values and searching the
* text area for the last occurrance of that string.
*
* @param fileName A String containing the file path name.
* @param line Line number for error message
* @param column Column number for error message
*/
public void selectErrorMessage(String fileName, int line, int column) {
String errorReportSubstring =
new java.io.File(fileName).getName()
+ ErrorList.LINE_PREFIX
+ line
+ ErrorList.POSITION_PREFIX
+ column;
int textPosition = assemble.getText().lastIndexOf(errorReportSubstring);
if (textPosition >= 0) {
int textLine = 0;
int lineStart = 0;
int lineEnd = 0;
try {
textLine = assemble.getLineOfOffset(textPosition);
lineStart = assemble.getLineStartOffset(textLine);
lineEnd = assemble.getLineEndOffset(textLine);
assemble.setSelectionColor(Color.YELLOW);
assemble.select(lineStart, lineEnd);
assemble.getCaret().setSelectionVisible(true);
assemble.repaint();
} catch (BadLocationException ble) {
// If there is a problem, simply skip the selection
}
}
}
/**
* Post a message to the assembler display
*
* @param message String to append to assembler display text
*/
public void postMarsMessage(String message) {
assemble.append(message);
// can do some crude cutting here. If the document gets "very large",
// let's cut off the oldest text. This will limit scrolling but the limit
// can be set reasonably high.
if (assemble.getDocument().getLength() > MAXIMUM_SCROLLED_CHARACTERS) {
try {
assemble.getDocument().remove(0, NUMBER_OF_CHARACTERS_TO_CUT);
} catch (BadLocationException ble) {
// only if NUMBER_OF_CHARACTERS_TO_CUT > MAXIMUM_SCROLLED_CHARACTERS
}
}
assemble.setCaretPosition(assemble.getDocument().getLength());
setSelectedComponent(assembleTab);
}
/** Constructor for the class, sets up two fresh tabbed text areas for program feedback. */
public MessagesPane() {
super();
this.setMinimumSize(new Dimension(0, 0));
assemble = new JTextArea();
run = new JTextArea();
assemble.setEditable(false);
run.setEditable(false);
// Set both text areas to mono font. For assemble
// pane, will make messages more readable. For run
// pane, will allow properly aligned "text graphics"
// DPS 15 Dec 2008
Font monoFont = new Font(Font.MONOSPACED, Font.PLAIN, 12);
assemble.setFont(monoFont);
run.setFont(monoFont);
JButton assembleTabClearButton = new JButton("Clear");
assembleTabClearButton.setToolTipText("Clear the Mars Messages area");
assembleTabClearButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
assemble.setText("");
}
});
assembleTab = new JPanel(new BorderLayout());
assembleTab.add(createBoxForButton(assembleTabClearButton), BorderLayout.WEST);
assembleTab.add(
new JScrollPane(
assemble,
ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED),
BorderLayout.CENTER);
assemble.addMouseListener(
new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
String text;
int lineStart = 0;
int lineEnd = 0;
try {
int line = assemble.getLineOfOffset(assemble.viewToModel(e.getPoint()));
lineStart = assemble.getLineStartOffset(line);
lineEnd = assemble.getLineEndOffset(line);
text = assemble.getText(lineStart, lineEnd - lineStart);
} catch (BadLocationException ble) {
text = "";
}
if (text.length() > 0) {
// If error or warning, parse out the line and column number.
if (text.startsWith(ErrorList.ERROR_MESSAGE_PREFIX)
|| text.startsWith(ErrorList.WARNING_MESSAGE_PREFIX)) {
assemble.select(lineStart, lineEnd);
assemble.setSelectionColor(Color.YELLOW);
assemble.repaint();
int separatorPosition = text.indexOf(ErrorList.MESSAGE_SEPARATOR);
if (separatorPosition >= 0) {
text = text.substring(0, separatorPosition);
}
String[] stringTokens = text.split("\\s"); // tokenize with whitespace delimiter
String lineToken = ErrorList.LINE_PREFIX.trim();
String columnToken = ErrorList.POSITION_PREFIX.trim();
String lineString = "";
String columnString = "";
for (int i = 0; i < stringTokens.length; i++) {
if (stringTokens[i].equals(lineToken) && i < stringTokens.length - 1)
lineString = stringTokens[i + 1];
if (stringTokens[i].equals(columnToken) && i < stringTokens.length - 1)
columnString = stringTokens[i + 1];
}
int line = 0;
int column = 0;
try {
line = Integer.parseInt(lineString);
} catch (NumberFormatException nfe) {
line = 0;
}
try {
column = Integer.parseInt(columnString);
} catch (NumberFormatException nfe) {
column = 0;
}
// everything between FILENAME_PREFIX and LINE_PREFIX is filename.
int fileNameStart =
text.indexOf(ErrorList.FILENAME_PREFIX) + ErrorList.FILENAME_PREFIX.length();
int fileNameEnd = text.indexOf(ErrorList.LINE_PREFIX);
String fileName = "";
if (fileNameStart < fileNameEnd
&& fileNameStart >= ErrorList.FILENAME_PREFIX.length()) {
fileName = text.substring(fileNameStart, fileNameEnd).trim();
}
if (fileName != null && fileName.length() > 0) {
selectEditorTextLine(fileName, line, column);
selectErrorMessage(fileName, line, column);
}
}
}
}
});
JButton runTabClearButton = new JButton("Clear");
runTabClearButton.setToolTipText("Clear the Run I/O area");
runTabClearButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
run.setText("");
}
});
runTab = new JPanel(new BorderLayout());
runTab.add(createBoxForButton(runTabClearButton), BorderLayout.WEST);
runTab.add(
new JScrollPane(
run,
ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED),
BorderLayout.CENTER);
this.addTab("Mars Messages", assembleTab);
this.addTab("Run I/O", runTab);
this.setToolTipTextAt(
0,
"Messages produced by Run menu. Click on assemble error message to select erroneous line");
this.setToolTipTextAt(1, "Simulated MIPS console input and output");
}