/*
* We need to know if the caret is currently positioned on the line we
* are about to paint so the line number can be highlighted.
*/
private boolean isCurrentLine(int rowStartOffset) {
int caretPosition = component.getCaretPosition();
Element root = component.getDocument().getDefaultRootElement();
if (root.getElementIndex(rowStartOffset) == root.getElementIndex(caretPosition)) return true;
else return false;
}
private static int getNSVisualPosition(EditorPane txt, int pos, int direction) {
Element root = txt.getDocument().getDefaultRootElement();
int numLines = root.getElementIndex(txt.getDocument().getLength() - 1) + 1;
int line = root.getElementIndex(pos) + 1;
int tarLine = direction == SwingConstants.NORTH ? line - 1 : line + 1;
try {
if (tarLine <= 0) {
return 0;
}
if (tarLine > numLines) {
return txt.getDocument().getLength();
}
Rectangle curRect = txt.modelToView(pos);
Rectangle tarEndRect;
if (tarLine < numLines) {
tarEndRect = txt.modelToView(txt.getLineStartOffset(tarLine) - 1);
} else {
tarEndRect = txt.modelToView(txt.getDocument().getLength() - 1);
}
Debug.log(9, "curRect: " + curRect + ", tarEnd: " + tarEndRect);
if (curRect.x > tarEndRect.x) {
pos = txt.viewToModel(new Point(tarEndRect.x, tarEndRect.y));
} else {
pos = txt.viewToModel(new Point(curRect.x, tarEndRect.y));
}
} catch (BadLocationException e) {
Debug.error(me + "Problem getting next visual position\n%s", e.getMessage());
}
return pos;
}
public Element getLineAtCaret(int caretPosition) {
Element root = getDocument().getDefaultRootElement();
if (caretPosition == -1) {
return root.getElement(root.getElementIndex(getCaretPosition()));
} else {
return root.getElement(root.getElementIndex(root.getElementIndex(caretPosition)));
}
}
public void caretUpdate(CaretEvent e) {
// when the cursor moves on _textView
// this method will be called. Then, we
// must determine what the line number is
// and update the line number view
Element root = textView.getDocument().getDefaultRootElement();
int line = root.getElementIndex(e.getDot());
root = root.getElement(line);
int col = root.getElementIndex(e.getDot());
lineNumberView.setText(line + ":" + col);
// if text is selected then enable copy and cut
boolean isSelection = e.getDot() != e.getMark();
copyAction.setEnabled(isSelection);
cutAction.setEnabled(isSelection);
}
/*
* Get the line number to be drawn. The empty string will be returned
* when a line of text has wrapped.
*/
protected String getTextLineNumber(int rowStartOffset) {
Element root = component.getDocument().getDefaultRootElement();
int index = root.getElementIndex(rowStartOffset);
Element line = root.getElement(index);
if (line.getStartOffset() == rowStartOffset) return String.valueOf(index + 1);
else return "";
}
public Element getLineAtPoint(MouseEvent me) {
Point p = me.getLocationOnScreen();
Point pp = getLocationOnScreen();
p.translate(-pp.x, -pp.y);
int pos = viewToModel(p);
Element root = getDocument().getDefaultRootElement();
int e = root.getElementIndex(pos);
if (e == -1) {
return null;
}
return root.getElement(e);
}
public void actionPerformed(JTextComponent text) {
indentationLogic = ((EditorPane) text).getIndentationLogic();
StyledDocument doc = (StyledDocument) text.getDocument();
Element map = doc.getDefaultRootElement();
Caret c = text.getCaret();
int dot = c.getDot();
int mark = c.getMark();
int line1 = map.getElementIndex(dot);
if (dot != mark) {
int line2 = map.getElementIndex(mark);
int begin = Math.min(line1, line2);
int end = Math.max(line1, line2);
Element elem;
try {
for (line1 = begin; line1 < end; line1++) {
elem = map.getElement(line1);
handleDecreaseIndent(line1, elem, doc);
}
elem = map.getElement(end);
int start = elem.getStartOffset();
if (Math.max(c.getDot(), c.getMark()) != start) {
handleDecreaseIndent(end, elem, doc);
}
} catch (BadLocationException ble) {
Debug.error(me + "Problem while de-indenting line\n%s", ble.getMessage());
UIManager.getLookAndFeel().provideErrorFeedback(text);
}
} else {
Element elem = map.getElement(line1);
try {
handleDecreaseIndent(line1, elem, doc);
} catch (BadLocationException ble) {
Debug.error(me + "Problem while de-indenting line\n%s", ble.getMessage());
UIManager.getLookAndFeel().provideErrorFeedback(text);
}
}
}
//
// Implement CaretListener interface
//
@Override
public void caretUpdate(CaretEvent e) {
// Get the line the caret is positioned on
int caretPosition = component.getCaretPosition();
Element root = component.getDocument().getDefaultRootElement();
int currentLine = root.getElementIndex(caretPosition);
// Need to repaint so the correct line number can be highlighted
if (lastLine != currentLine) {
repaint();
lastLine = currentLine;
}
}
public void actionPerformed(JTextComponent text) {
indentationLogic = ((EditorPane) text).getIndentationLogic();
boolean indentError = false;
Document doc = text.getDocument();
Element map = doc.getDefaultRootElement();
String tabWhitespace = PreferencesUser.getInstance().getTabWhitespace();
Caret c = text.getCaret();
int dot = c.getDot();
int mark = c.getMark();
int dotLine = map.getElementIndex(dot);
int markLine = map.getElementIndex(mark);
if (dotLine != markLine) {
int first = Math.min(dotLine, markLine);
int last = Math.max(dotLine, markLine);
Element elem;
int start;
try {
for (int i = first; i < last; i++) {
elem = map.getElement(i);
start = elem.getStartOffset();
doc.insertString(start, tabWhitespace, null);
}
elem = map.getElement(last);
start = elem.getStartOffset();
if (Math.max(c.getDot(), c.getMark()) != start) {
doc.insertString(start, tabWhitespace, null);
}
} catch (BadLocationException ble) {
Debug.error(me + "Problem while indenting line\n%s", ble.getMessage());
UIManager.getLookAndFeel().provideErrorFeedback(text);
}
} else {
text.replaceSelection(tabWhitespace);
}
}
private String addWhiteSpace(Document doc, int offset) throws BadLocationException {
StringBuilder whiteSpace = new StringBuilder("\n");
Element rootElement = doc.getDefaultRootElement();
int line = rootElement.getElementIndex(offset);
int i = rootElement.getElement(line).getStartOffset();
while (true) {
String temp = doc.getText(i, 1);
if (temp.equals(" ") || temp.equals("\t")) {
whiteSpace.append(temp);
i++;
} else break;
}
return whiteSpace.toString();
}
private void checkCompletion(java.awt.event.KeyEvent ke) throws BadLocationException {
Document doc = getDocument();
Element root = doc.getDefaultRootElement();
int pos = getCaretPosition();
int lineIdx = root.getElementIndex(pos);
Element line = root.getElement(lineIdx);
int start = line.getStartOffset(), len = line.getEndOffset() - start;
String strLine = doc.getText(start, len - 1);
Debug.log(9, "[" + strLine + "]");
if (strLine.endsWith("find") && ke.getKeyChar() == '(') {
ke.consume();
doc.insertString(pos, "(", null);
ButtonCapture btnCapture = new ButtonCapture(this, line);
insertComponent(btnCapture);
doc.insertString(pos + 2, ")", null);
}
}
/*
* Determine the Y offset for the current row
*/
private int getOffsetY(int rowStartOffset, FontMetrics fontMetrics) throws BadLocationException {
// Get the bounding rectangle of the row
Rectangle r = component.modelToView(rowStartOffset);
int lineHeight = fontMetrics.getHeight();
int y = r.y + r.height;
int descent = 0;
// The text needs to be positioned above the bottom of the bounding
// rectangle based on the descent of the font(s) contained on the row.
if (r.height == lineHeight) // default font is being used
{
descent = fontMetrics.getDescent();
} else // We need to check all the attributes for font changes
{
if (fonts == null) fonts = new HashMap<String, FontMetrics>();
Element root = component.getDocument().getDefaultRootElement();
int index = root.getElementIndex(rowStartOffset);
Element line = root.getElement(index);
for (int i = 0; i < line.getElementCount(); i++) {
Element child = line.getElement(i);
AttributeSet as = child.getAttributes();
String fontFamily = (String) as.getAttribute(StyleConstants.FontFamily);
Integer fontSize = (Integer) as.getAttribute(StyleConstants.FontSize);
String key = fontFamily + fontSize;
FontMetrics fm = fonts.get(key);
if (fm == null) {
Font font = new Font(fontFamily, Font.PLAIN, fontSize);
fm = component.getFontMetrics(font);
fonts.put(key, fm);
}
descent = Math.max(descent, fm.getDescent());
}
}
return y - descent;
}
private void insertNewlineWithAutoIndent(JTextComponent text) {
try {
int caretPos = text.getCaretPosition();
StyledDocument doc = (StyledDocument) text.getDocument();
Element map = doc.getDefaultRootElement();
int lineNum = map.getElementIndex(caretPos);
Element line = map.getElement(lineNum);
int start = line.getStartOffset();
int end = line.getEndOffset() - 1;
int len = end - start;
String s = doc.getText(start, len);
String leadingWS = PythonIndentation.getLeadingWhitespace(doc, start, caretPos - start);
StringBuffer sb = new StringBuffer("\n");
sb.append(leadingWS);
// TODO better control over automatic indentation
indentationLogic.checkIndent(leadingWS, lineNum + 1);
// If there is only whitespace between the caret and
// the EOL, pressing Enter auto-indents the new line to
// the same place as the previous line.
int nonWhitespacePos = PythonIndentation.atEndOfLine(doc, caretPos, start, s, len);
if (nonWhitespacePos == -1) {
if (leadingWS.length() == len) {
// If the line was nothing but whitespace, select it
// so its contents get removed.
text.setSelectionStart(start);
} else {
// Select the whitespace between the caret and the EOL
// to remove it
text.setSelectionStart(caretPos);
}
text.setSelectionEnd(end);
text.replaceSelection(sb.toString());
// auto-indentation for python statements like if, while, for, try,
// except, def, class and auto-deindentation for break, continue,
// pass, return
analyseDocument(doc, lineNum, indentationLogic);
// auto-completion: add colon if it is obvious
if (indentationLogic.shouldAddColon()) {
doc.insertString(caretPos, ":", null);
indentationLogic.setLastLineEndsWithColon();
}
int lastLineChange = indentationLogic.shouldChangeLastLineIndentation();
int nextLineChange = indentationLogic.shouldChangeNextLineIndentation();
if (lastLineChange != 0) {
Debug.log(5, "change line %d indentation by %d columns", lineNum + 1, lastLineChange);
changeIndentation((DefaultStyledDocument) doc, lineNum, lastLineChange);
// nextLineChange was determined based on indentation of last line before
// the change
nextLineChange += lastLineChange;
}
if (nextLineChange != 0) {
Debug.log(5, "change line %d indentation by %d columns", lineNum + 2, nextLineChange);
changeIndentation((DefaultStyledDocument) doc, lineNum + 1, nextLineChange);
}
} // If there is non-whitespace between the caret and the
// EOL, pressing Enter takes that text to the next line
// and auto-indents it to the same place as the last
// line. Additional auto-indentation or dedentation for
// specific python statements is only done for the next line.
else {
text.setCaretPosition(nonWhitespacePos);
doc.insertString(nonWhitespacePos, sb.toString(), null);
analyseDocument(doc, lineNum, indentationLogic);
int nextLineChange = indentationLogic.shouldChangeNextLineIndentation();
if (nextLineChange != 0) {
Debug.log(5, "change line %d indentation by %d columns", lineNum + 2, nextLineChange);
changeIndentation((DefaultStyledDocument) doc, lineNum + 1, nextLineChange);
}
}
} catch (BadLocationException ble) {
text.replaceSelection("\n");
Debug.error(me + "Problem while inserting new line with auto-indent\n%s", ble.getMessage());
}
}
public int getLineNumberAtCaret(int caretPosition) {
Element root = getDocument().getDefaultRootElement();
return root.getElementIndex(caretPosition) + 1;
}