Mega Code Archive
A simple editor
<![CDATA[
//Code revised from
/*
The Definitive Guide to SWT and JFace
by Robert Harris and Rob Warner
Apress 2004
*/
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Hashtable;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
import java.util.Stack;
import java.util.StringTokenizer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ExtendedModifyEvent;
import org.eclipse.swt.custom.ExtendedModifyListener;
import org.eclipse.swt.custom.LineStyleEvent;
import org.eclipse.swt.custom.LineStyleListener;
import org.eclipse.swt.custom.ST;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.custom.StyledTextPrintOptions;
import org.eclipse.swt.events.ArmEvent;
import org.eclipse.swt.events.ArmListener;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.printing.Printer;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
public class PmpEditor {
// The number of operations that can be undone
private static final int UNDO_LIMIT = 500;
// Contains a reference to this application
private static PmpEditor app;
// Contains a reference to the main window
private Shell shell;
// Displays the file
private StyledText st;
// The full path of the current file
private String filename;
// The font for the StyledText
private Font font;
// The label to display statistics
private Label status;
// The print options and printer
private StyledTextPrintOptions options;
private Printer printer;
// The stack used to store the undo information
private Stack changes;
// Flag to set before performaing an undo, so the undo
// operation doesn't get stored with the rest of the undo
// information
private boolean ignoreUndo = false;
// Syntax data for the current extension
private SyntaxData sd;
// Line style listener
private PmpeLineStyleListener lineStyleListener;
/**
* Gets the reference to this application
*
* @return HexEditor
*/
public static PmpEditor getApp() {
return app;
}
/**
* Constructs a PmpEditor
*/
public PmpEditor() {
app = this;
changes = new Stack();
// Set up the printing options
options = new StyledTextPrintOptions();
options.footer = StyledTextPrintOptions.SEPARATOR + StyledTextPrintOptions.PAGE_TAG
+ StyledTextPrintOptions.SEPARATOR + "Confidential";
}
/**
* Runs the application
*/
public void run() {
Display display = new Display();
shell = new Shell(display);
// Choose a monospaced font
font = new Font(display, "Terminal", 12, SWT.NONE);
createContents(shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
font.dispose();
display.dispose();
if (printer != null)
printer.dispose();
}
/**
* Creates the main window's contents
*
* @param shell
* the main window
*/
private void createContents(Shell shell) {
// Set the layout and the menu bar
shell.setLayout(new FormLayout());
shell.setMenuBar(new PmpEditorMenu(shell).getMenu());
// Create the status bar
status = new Label(shell, SWT.BORDER);
FormData data = new FormData();
data.left = new FormAttachment(0, 0);
data.right = new FormAttachment(100, 0);
data.bottom = new FormAttachment(100, 0);
data.height = status.computeSize(SWT.DEFAULT, SWT.DEFAULT).y;
status.setLayoutData(data);
// Create the styled text
st = new StyledText(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
data = new FormData();
data.left = new FormAttachment(0);
data.right = new FormAttachment(100);
data.top = new FormAttachment(0);
data.bottom = new FormAttachment(status);
st.setLayoutData(data);
// Set the font
st.setFont(font);
// Add Brief delete next word
// Use SWT.MOD1 instead of SWT.CTRL for portability
st.setKeyBinding('k' | SWT.MOD1, ST.DELETE_NEXT);
// Add vi end of line (kind of)
// Use SWT.MOD1 instead of SWT.CTRL for portability
// Use SWT.MOD2 instead of SWT.SHIFT for portability
// Shift+4 is $
st.setKeyBinding('4' | SWT.MOD1 | SWT.MOD2, ST.LINE_END);
// Handle key presses
st.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent event) {
// Update the status bar
updateStatus();
}
});
// Handle text modifications
st.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent event) {
// Update the status bar
updateStatus();
// Update the comments
if (lineStyleListener != null) {
lineStyleListener.refreshMultilineComments(st.getText());
st.redraw();
}
}
});
// Store undo information
st.addExtendedModifyListener(new ExtendedModifyListener() {
public void modifyText(ExtendedModifyEvent event) {
if (!ignoreUndo) {
// Push this change onto the changes stack
changes.push(new TextChange(event.start, event.length, event.replacedText));
if (changes.size() > UNDO_LIMIT)
changes.remove(0);
}
}
});
// Update the title bar and the status bar
updateTitle();
updateStatus();
}
/**
* Opens a file
*/
public void openFile() {
FileDialog dlg = new FileDialog(shell);
String temp = dlg.open();
if (temp != null) {
try {
// Get the file's contents
String text = PmpeIoManager.getFile(temp);
// File loaded, so save the file name
filename = temp;
// Update the syntax properties to use
updateSyntaxData();
// Put the new file's data in the StyledText
st.setText(text);
// Update the title bar
updateTitle();
// Delete any undo information
changes.clear();
} catch (IOException e) {
showError(e.getMessage());
}
}
}
/**
* Saves a file
*/
public void saveFile() {
if (filename == null) {
saveFileAs();
} else {
try {
// Save the file and update the title bar based on the new file name
PmpeIoManager.saveFile(filename, st.getText().getBytes());
updateTitle();
} catch (IOException e) {
showError(e.getMessage());
}
}
}
/**
* Saves a file under a different name
*/
public void saveFileAs() {
FileDialog dlg = new FileDialog(shell);
if (filename != null) {
dlg.setFileName(filename);
}
String temp = dlg.open();
if (temp != null) {
filename = temp;
// The extension may have changed; update the syntax data accordingly
updateSyntaxData();
saveFile();
}
}
/**
* Prints the document to the default printer
*/
public void print() {
if (printer == null)
printer = new Printer();
options.header = StyledTextPrintOptions.SEPARATOR + filename + StyledTextPrintOptions.SEPARATOR;
st.print(printer, options).run();
}
/**
* Cuts the current selection to the clipboard
*/
public void cut() {
st.cut();
}
/**
* Copies the current selection to the clipboard
*/
public void copy() {
st.copy();
}
/**
* Pastes the clipboard's contents
*/
public void paste() {
st.paste();
}
/**
* Selects all the text
*/
public void selectAll() {
st.selectAll();
}
/**
* Undoes the last change
*/
public void undo() {
// Make sure undo stack isn't empty
if (!changes.empty()) {
// Get the last change
TextChange change = (TextChange) changes.pop();
// Set the flag. Otherwise, the replaceTextRange call will get placed
// on the undo stack
ignoreUndo = true;
// Replace the changed text
st.replaceTextRange(change.getStart(), change.getLength(), change.getReplacedText());
// Move the caret
st.setCaretOffset(change.getStart());
// Scroll the screen
st.setTopIndex(st.getLineAtOffset(change.getStart()));
ignoreUndo = false;
}
}
/**
* Toggles word wrap
*/
public void toggleWordWrap() {
st.setWordWrap(!st.getWordWrap());
}
/**
* Gets the current word wrap settings
*
* @return boolean
*/
public boolean getWordWrap() {
return st.getWordWrap();
}
/**
* Shows an about box
*/
public void about() {
MessageBox mb = new MessageBox(shell, SWT.ICON_INFORMATION | SWT.OK);
mb.setMessage("Poor Man's Programming Editor");
mb.open();
}
/**
* Updates the title bar
*/
private void updateTitle() {
String fn = filename == null ? "Untitled" : filename;
shell.setText(fn + " -- PmPe");
}
/**
* Updates the status bar
*/
private void updateStatus() {
// Show the offset into the file, the total number of characters in the
// file,
// the current line number (1-based) and the total number of lines
StringBuffer buf = new StringBuffer();
buf.append("Offset: ");
buf.append(st.getCaretOffset());
buf.append("\tChars: ");
buf.append(st.getCharCount());
buf.append("\tLine: ");
buf.append(st.getLineAtOffset(st.getCaretOffset()) + 1);
buf.append(" of ");
buf.append(st.getLineCount());
status.setText(buf.toString());
}
/**
* Updates the syntax data based on the filename's extension
*/
private void updateSyntaxData() {
// Determine the extension of the current file
String extension = "";
if (filename != null) {
int pos = filename.lastIndexOf(".");
if (pos > -1 && pos < filename.length() - 2) {
extension = filename.substring(pos + 1);
}
}
// Get the syntax data for the extension
sd = SyntaxManager.getSyntaxData(extension);
// Reset the line style listener
if (lineStyleListener != null) {
st.removeLineStyleListener(lineStyleListener);
}
lineStyleListener = new PmpeLineStyleListener(sd);
st.addLineStyleListener(lineStyleListener);
// Redraw the contents to reflect the new syntax data
st.redraw();
}
/**
* Shows an error message
*
* @param error
* the text to show
*/
private void showError(String error) {
MessageBox mb = new MessageBox(shell, SWT.ICON_ERROR | SWT.OK);
mb.setMessage(error);
mb.open();
}
/**
* The application entry point
*
* @param args
* the command line arguments
*/
public static void main(String[] args) {
new PmpEditor().run();
}
}
class PmpEditorMenu {
// The underlying menu this class wraps
Menu menu = null;
/**
* Constructs a PmpEditorMenu
*
* @param shell
* the parent shell
*/
public PmpEditorMenu(final Shell shell) {
// Create the menu
menu = new Menu(shell, SWT.BAR);
// Create the File top-level menu
MenuItem item = new MenuItem(menu, SWT.CASCADE);
item.setText("File");
Menu dropMenu = new Menu(shell, SWT.DROP_DOWN);
item.setMenu(dropMenu);
// Create File->Open
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("Open...\tCtrl+O");
item.setAccelerator(SWT.CTRL + 'O');
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().openFile();
}
});
// Create File->Save
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("Save\tCtrl+S");
item.setAccelerator(SWT.CTRL + 'S');
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().saveFile();
}
});
// Create File->Save As
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("Save As...");
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().saveFileAs();
}
});
new MenuItem(dropMenu, SWT.SEPARATOR);
// Create File->Print
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("Print\tCtrl+P");
item.setAccelerator(SWT.CTRL + 'P');
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().print();
}
});
new MenuItem(dropMenu, SWT.SEPARATOR);
// Create File->Exit
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("Exit\tAlt+F4");
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
shell.close();
}
});
// Create Edit
item = new MenuItem(menu, SWT.CASCADE);
item.setText("Edit");
dropMenu = new Menu(shell, SWT.DROP_DOWN);
item.setMenu(dropMenu);
// Create Edit->Cut
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("Cut\tCtrl+X");
item.setAccelerator(SWT.CTRL + 'X');
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().cut();
}
});
// Create Edit->Copy
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("Copy\tCtrl+C");
item.setAccelerator(SWT.CTRL + 'C');
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().copy();
}
});
// Create Edit->Paste
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("Paste\tCtrl+V");
item.setAccelerator(SWT.CTRL + 'V');
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().paste();
}
});
new MenuItem(dropMenu, SWT.SEPARATOR);
// Create Select All
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("Select All\tCtrl+A");
item.setAccelerator(SWT.CTRL + 'A');
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().selectAll();
}
});
new MenuItem(dropMenu, SWT.SEPARATOR);
// Create Undo
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("Undo\tCtrl+Z");
item.setAccelerator(SWT.CTRL + 'Z');
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().undo();
}
});
new MenuItem(dropMenu, SWT.SEPARATOR);
// Create Word Wrap
final MenuItem wwItem = new MenuItem(dropMenu, SWT.CHECK);
wwItem.setText("Word Wrap\tCtrl+W");
wwItem.setAccelerator(SWT.CTRL + 'W');
wwItem.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().toggleWordWrap();
}
});
wwItem.addArmListener(new ArmListener() {
public void widgetArmed(ArmEvent event) {
wwItem.setSelection(PmpEditor.getApp().getWordWrap());
}
});
// Create Help
item = new MenuItem(menu, SWT.CASCADE);
item.setText("Help");
dropMenu = new Menu(shell, SWT.DROP_DOWN);
item.setMenu(dropMenu);
// Create Help->About
item = new MenuItem(dropMenu, SWT.NULL);
item.setText("About\tCtrl+A");
item.setAccelerator(SWT.CTRL + 'A');
item.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
PmpEditor.getApp().about();
}
});
}
/**
* Gets the underlying menu
*
* @return Menu
*/
public Menu getMenu() {
return menu;
}
}
class PmpeIoManager {
/**
* Gets a file (loads it) from the filesystem
*
* @param filename
* the full path of the file
* @return String
* @throws IOException
* if file cannot be loaded
*/
public static String getFile(String filename) throws IOException {
InputStream in = new BufferedInputStream(new FileInputStream(filename));
StringBuffer buf = new StringBuffer();
int c;
while ((c = in.read()) != -1) {
buf.append((char) c);
}
return buf.toString();
}
/**
* Saves a file
*
* @param filename
* the full path of the file to save
* @param data
* the data to save
* @throws IOException
* if file cannot be saved
*/
public static void saveFile(String filename, byte[] data) throws IOException {
File outputFile = new File(filename);
FileOutputStream out = new FileOutputStream(outputFile);
out.write(data);
out.close();
}
}
class TextChange {
// The starting offset of the change
private int start;
// The length of the change
private int length;
// The replaced text
String replacedText;
/**
* Constructs a TextChange
*
* @param start
* the starting offset of the change
* @param length
* the length of the change
* @param replacedText
* the text that was replaced
*/
public TextChange(int start, int length, String replacedText) {
this.start = start;
this.length = length;
this.replacedText = replacedText;
}
/**
* Returns the start
*
* @return int
*/
public int getStart() {
return start;
}
/**
* Returns the length
*
* @return int
*/
public int getLength() {
return length;
}
/**
* Returns the replacedText
*
* @return String
*/
public String getReplacedText() {
return replacedText;
}
}
/**
* This class contains information for syntax coloring and styling for an
* extension
*/
class SyntaxData {
private String extension;
private Collection keywords;
private String punctuation;
private String comment;
private String multiLineCommentStart;
private String multiLineCommentEnd;
/**
* Constructs a SyntaxData
*
* @param extension
* the extension
*/
public SyntaxData(String extension) {
this.extension = extension;
}
/**
* Gets the extension
*
* @return String
*/
public String getExtension() {
return extension;
}
/**
* Gets the comment
*
* @return String
*/
public String getComment() {
return comment;
}
/**
* Sets the comment
*
* @param comment
* The comment to set.
*/
public void setComment(String comment) {
this.comment = comment;
}
/**
* Gets the keywords
*
* @return Collection
*/
public Collection getKeywords() {
return keywords;
}
/**
* Sets the keywords
*
* @param keywords
* The keywords to set.
*/
public void setKeywords(Collection keywords) {
this.keywords = keywords;
}
/**
* Gets the multiline comment end
*
* @return String
*/
public String getMultiLineCommentEnd() {
return multiLineCommentEnd;
}
/**
* Sets the multiline comment end
*
* @param multiLineCommentEnd
* The multiLineCommentEnd to set.
*/
public void setMultiLineCommentEnd(String multiLineCommentEnd) {
this.multiLineCommentEnd = multiLineCommentEnd;
}
/**
* Gets the multiline comment start
*
* @return String
*/
public String getMultiLineCommentStart() {
return multiLineCommentStart;
}
/**
* Sets the multiline comment start
*
* @param multiLineCommentStart
* The multiLineCommentStart to set.
*/
public void setMultiLineCommentStart(String multiLineCommentStart) {
this.multiLineCommentStart = multiLineCommentStart;
}
/**
* Gets the punctuation
*
* @return String
*/
public String getPunctuation() {
return punctuation;
}
/**
* Sets the punctuation
*
* @param punctuation
* The punctuation to set.
*/
public void setPunctuation(String punctuation) {
this.punctuation = punctuation;
}
}
/**
* This class manages the syntax coloring and styling data
*/
class SyntaxManager {
// Lazy cache of SyntaxData objects
private static Map data = new Hashtable();
/**
* Gets the syntax data for an extension
*/
public static synchronized SyntaxData getSyntaxData(String extension) {
// Check in cache
SyntaxData sd = (SyntaxData) data.get(extension);
if (sd == null) {
// Not in cache; load it and put in cache
sd = loadSyntaxData(extension);
if (sd != null)
data.put(sd.getExtension(), sd);
}
return sd;
}
/**
* Loads the syntax data for an extension
*
* @param extension
* the extension to load
* @return SyntaxData
*/
private static SyntaxData loadSyntaxData(String extension) {
SyntaxData sd = null;
try {
ResourceBundle rb = ResourceBundle.getBundle("examples.ch11." + extension);
sd = new SyntaxData(extension);
sd.setComment(rb.getString("comment"));
sd.setMultiLineCommentStart(rb.getString("multilinecommentstart"));
sd.setMultiLineCommentEnd(rb.getString("multilinecommentend"));
// Load the keywords
Collection keywords = new ArrayList();
for (StringTokenizer st = new StringTokenizer(rb.getString("keywords"), " "); st
.hasMoreTokens();) {
keywords.add(st.nextToken());
}
sd.setKeywords(keywords);
// Load the punctuation
sd.setPunctuation(rb.getString("punctuation"));
} catch (MissingResourceException e) {
// Ignore
}
return sd;
}
}
/**
* This class performs the syntax highlighting and styling for Pmpe
*/
class PmpeLineStyleListener implements LineStyleListener {
// Colors
private static final Color COMMENT_COLOR = Display.getCurrent().getSystemColor(
SWT.COLOR_DARK_GREEN);
private static final Color COMMENT_BACKGROUND = Display.getCurrent().getSystemColor(
SWT.COLOR_GRAY);
private static final Color PUNCTUATION_COLOR = Display.getCurrent().getSystemColor(
SWT.COLOR_DARK_CYAN);
private static final Color KEYWORD_COLOR = Display.getCurrent().getSystemColor(
SWT.COLOR_DARK_MAGENTA);
// Holds the syntax data
private SyntaxData syntaxData;
// Holds the offsets for all multiline comments
List commentOffsets;
/**
* PmpeLineStyleListener constructor
*
* @param syntaxData
* the syntax data to use
*/
public PmpeLineStyleListener(SyntaxData syntaxData) {
this.syntaxData = syntaxData;
commentOffsets = new LinkedList();
}
/**
* Refreshes the offsets for all multiline comments in the parent StyledText.
* The parent StyledText should call this whenever its text is modified. Note
* that this code doesn't ignore comment markers inside strings.
*
* @param text
* the text from the StyledText
*/
public void refreshMultilineComments(String text) {
// Clear any stored offsets
commentOffsets.clear();
if (syntaxData != null) {
// Go through all the instances of COMMENT_START
for (int pos = text.indexOf(syntaxData.getMultiLineCommentStart()); pos > -1; pos = text
.indexOf(syntaxData.getMultiLineCommentStart(), pos)) {
// offsets[0] holds the COMMENT_START offset
// and COMMENT_END holds the ending offset
int[] offsets = new int[2];
offsets[0] = pos;
// Find the corresponding end comment.
pos = text.indexOf(syntaxData.getMultiLineCommentEnd(), pos);
// If no corresponding end comment, use the end of the text
offsets[1] = pos == -1 ? text.length() - 1 : pos
+ syntaxData.getMultiLineCommentEnd().length() - 1;
pos = offsets[1];
// Add the offsets to the collection
commentOffsets.add(offsets);
}
}
}
/**
* Checks to see if the specified section of text begins inside a multiline
* comment. Returns the index of the closing comment, or the end of the line
* if the whole line is inside the comment. Returns -1 if the line doesn't
* begin inside a comment.
*
* @param start
* the starting offset of the text
* @param length
* the length of the text
* @return int
*/
private int getBeginsInsideComment(int start, int length) {
// Assume section doesn't being inside a comment
int index = -1;
// Go through the multiline comment ranges
for (int i = 0, n = commentOffsets.size(); i < n; i++) {
int[] offsets = (int[]) commentOffsets.get(i);
// If starting offset is past range, quit
if (offsets[0] > start + length)
break;
// Check to see if section begins inside a comment
if (offsets[0] <= start && offsets[1] >= start) {
// It does; determine if the closing comment marker is inside
// this section
index = offsets[1] > start + length ? start + length : offsets[1]
+ syntaxData.getMultiLineCommentEnd().length() - 1;
}
}
return index;
}
/**
* Called by StyledText to get styles for a line
*/
public void lineGetStyle(LineStyleEvent event) {
// Only do styles if syntax data has been loaded
if (syntaxData != null) {
// Create collection to hold the StyleRanges
List styles = new ArrayList();
int start = 0;
int length = event.lineText.length();
// Check if line begins inside a multiline comment
int mlIndex = getBeginsInsideComment(event.lineOffset, event.lineText.length());
if (mlIndex > -1) {
// Line begins inside multiline comment; create the range
styles.add(new StyleRange(event.lineOffset, mlIndex - event.lineOffset, COMMENT_COLOR,
COMMENT_BACKGROUND));
start = mlIndex;
}
// Do punctuation, single-line comments, and keywords
while (start < length) {
// Check for multiline comments that begin inside this line
if (event.lineText.indexOf(syntaxData.getMultiLineCommentStart(), start) == start) {
// Determine where comment ends
int endComment = event.lineText.indexOf(syntaxData.getMultiLineCommentEnd(), start);
// If comment doesn't end on this line, extend range to end of line
if (endComment == -1)
endComment = length;
else
endComment += syntaxData.getMultiLineCommentEnd().length();
styles.add(new StyleRange(event.lineOffset + start, endComment - start, COMMENT_COLOR,
COMMENT_BACKGROUND));
// Move marker
start = endComment;
}
// Check for single line comments
else if (event.lineText.indexOf(syntaxData.getComment(), start) == start) {
// Comment rest of line
styles.add(new StyleRange(event.lineOffset + start, length - start, COMMENT_COLOR,
COMMENT_BACKGROUND));
// Move marker
start = length;
}
// Check for punctuation
else if (syntaxData.getPunctuation().indexOf(event.lineText.charAt(start)) > -1) {
// Add range for punctuation
styles.add(new StyleRange(event.lineOffset + start, 1, PUNCTUATION_COLOR, null));
++start;
} else if (Character.isLetter(event.lineText.charAt(start))) {
// Get the next word
StringBuffer buf = new StringBuffer();
int i = start;
// Call any consecutive letters a word
for (; i < length && Character.isLetter(event.lineText.charAt(i)); i++) {
buf.append(event.lineText.charAt(i));
}
// See if the word is a keyword
if (syntaxData.getKeywords().contains(buf.toString())) {
// It's a keyword; create the StyleRange
styles.add(new StyleRange(event.lineOffset + start, i - start, KEYWORD_COLOR, null,
SWT.BOLD));
}
// Move the marker to the last char (the one that wasn't a letter)
// so it can be retested in the next iteration through the loop
start = i;
} else
// It's nothing we're interested in; advance the marker
++start;
}
// Copy the StyleRanges back into the event
event.styles = (StyleRange[]) styles.toArray(new StyleRange[0]);
}
}
}
]]>