本文整理了Java中javax.swing.text.Document.getDefaultRootElement()方法的一些代码示例，展示了Document.getDefaultRootElement()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Document.getDefaultRootElement()方法的具体详情如下：
包路径：javax.swing.text.Document
类名称：Document
方法名：getDefaultRootElement

Document.getDefaultRootElement介绍

暂无

代码示例

代码示例来源：origin: SonarSource/sonarqube

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 "";
}

代码示例来源：origin: groovy/groovy-core

public void focusGained(FocusEvent fe) {
    textComponent = (JTextComponent) fe.getSource();
    attributeSet =
        textComponent.getDocument().getDefaultRootElement().getAttributes();
  }
};

代码示例来源：origin: skylot/jadx

@Nullable
protected String getTextLineNumber(int rowStartOffset) {
  Element root = codeArea.getDocument().getDefaultRootElement();
  int index = root.getElementIndex(rowStartOffset);
  Element line = root.getElement(index);
  if (line.getStartOffset() != rowStartOffset) {
    return null;
  }
  int lineNumber = index + 1;
  if (useSourceLines) {
    Integer sourceLine = codeArea.getSourceLine(lineNumber);
    if (sourceLine == null) {
      return null;
    }
    return String.valueOf(sourceLine);
  }
  return String.valueOf(lineNumber);
}

代码示例来源：origin: SonarSource/sonarqube

private boolean isCurrentLine(int rowStartOffset) {
 int caretPosition = component.getCaretPosition();
 Element root = component.getDocument().getDefaultRootElement();
 return root.getElementIndex(rowStartOffset) == root.getElementIndex(caretPosition);
}

代码示例来源：origin: SonarSource/sonarqube

@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;
 }
}

代码示例来源：origin: skylot/jadx

private boolean isCurrentLine(int rowStartOffset) {
  int caretPosition = codeArea.getCaretPosition();
  Element root = codeArea.getDocument().getDefaultRootElement();
  return root.getElementIndex(rowStartOffset) == root.getElementIndex(caretPosition);
}

代码示例来源：origin: skylot/jadx

@Override
public void caretUpdate(CaretEvent e) {
  int caretPosition = codeArea.getCaretPosition();
  Element root = codeArea.getDocument().getDefaultRootElement();
  int currentLine = root.getElementIndex(caretPosition);
  if (lastLine != currentLine) {
    repaint();
    lastLine = currentLine;
  }
}

代码示例来源：origin: skylot/jadx

private void setPreferredWidth() {
  Element root = codeArea.getDocument().getDefaultRootElement();
  int lines = root.getElementCount();
  int digits = Math.max(String.valueOf(lines).length(), 3);
  if (lastDigits != digits) {
    lastDigits = digits;
    FontMetrics fontMetrics = getFontMetrics(getFont());
    int width = fontMetrics.charWidth('0') * digits;
    Insets insets = getInsets();
    int preferredWidth = insets.left + insets.right + width;
    Dimension d = getPreferredSize();
    if (d != null) {
      d.setSize(preferredWidth, NUM_HEIGHT);
      setPreferredSize(d);
      setSize(d);
    }
  }
}

代码示例来源：origin: skylot/jadx

fonts = new HashMap<>();
Element root = codeArea.getDocument().getDefaultRootElement();
int index = root.getElementIndex(rowStartOffset);
Element line = root.getElement(index);

代码示例来源：origin: SonarSource/sonarqube

/**
 *  Calculate the width needed to display the maximum line number
 */
private void setPreferredWidth() {
 Element root = component.getDocument().getDefaultRootElement();
 int lines = root.getElementCount();
 int digits = Math.max(String.valueOf(lines).length(), minimumDisplayDigits);
 // Update sizes when number of digits in the line number changes
 if (lastDigits != digits) {
  lastDigits = digits;
  FontMetrics fontMetrics = getFontMetrics(getFont());
  int width = fontMetrics.charWidth('0') * digits;
  Insets insets = getInsets();
  int preferredWidth = insets.left + insets.right + width;
  Dimension d = getPreferredSize();
  d.setSize(preferredWidth, HEIGHT);
  setPreferredSize(d);
  setSize(d);
 }
}

代码示例来源：origin: SonarSource/sonarqube

fonts = new HashMap<>();
Element root = component.getDocument().getDefaultRootElement();
int index = root.getElementIndex(rowStartOffset);
Element line = root.getElement(index);

代码示例来源：origin: groovy/groovy-core

@Override
  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    // starting position in document
    int start = textEditor.viewToModel(getViewport().getViewPosition());
    // end position in document
    int end = textEditor.viewToModel(new Point(10,
        getViewport().getViewPosition().y +
            (int) textEditor.getVisibleRect().getHeight())
    );
    // translate offsets to lines
    Document doc = textEditor.getDocument();
    int startline = doc.getDefaultRootElement().getElementIndex(start) + 1;
    int endline = doc.getDefaultRootElement().getElementIndex(end) + 1;
    Font f = textEditor.getFont();
    int fontHeight = g.getFontMetrics(f).getHeight();
    int fontDesc = g.getFontMetrics(f).getDescent();
    int startingY = -1;
    try {
      startingY = textEditor.modelToView(start).y + fontHeight - fontDesc;
    } catch (BadLocationException e1) {
      System.err.println(e1.getMessage());
    }
    g.setFont(f);
    for (int line = startline, y = startingY; line <= endline; y += fontHeight, line++) {
      String lineNumber = StringGroovyMethods.padLeft(Integer.toString(line), 4, " ");
      g.drawString(lineNumber, 0, y);
    }
  }
}

代码示例来源：origin: ron190/jsql-injection

/**
 * Get index of line for current offset (generally cursor position).
 * @param offset Position on the line
 * @return Index of the line
 * @throws BadLocationException
 */
public int getLineOfOffset(int offset) throws BadLocationException {
  String errorMsg = "Can't translate offset to line";
  Document doc = this.getDocument();
  if (offset < 0) {
    throw new BadLocationException(errorMsg, -1);
  } else if (offset > doc.getLength()) {
    throw new BadLocationException(errorMsg, doc.getLength() + 1);
  } else {
    Element map = doc.getDefaultRootElement();
    return map.getElementIndex(offset);
  }
}

代码示例来源：origin: bobbylight/RSyntaxTextArea

private static Element getLineElem(Document d, int offs) {
  Element map = d.getDefaultRootElement();
  int index = map.getElementIndex(offs);
  Element elem = map.getElement(index);
  if ((offs>=elem.getStartOffset()) && (offs<elem.getEndOffset())) {
    return elem;
  }
  return null;
}

代码示例来源：origin: bobbylight/RSyntaxTextArea

private void doError(SAXParseException e, ParserNotice.Level level) {
  int line = e.getLineNumber() - 1;
  Element root = doc.getDefaultRootElement();
  Element elem = root.getElement(line);
  int offs = elem.getStartOffset();
  int len = elem.getEndOffset() - offs;
  if (line==root.getElementCount()-1) {
    len++;
  }
  DefaultParserNotice pn = new DefaultParserNotice(XmlParser.this,
                  e.getMessage(), line, offs, len);
  pn.setLevel(level);
  result.addNotice(pn);
}

代码示例来源：origin: bobbylight/RSyntaxTextArea

/**
 * Returns the leading whitespace of a specific line in a document.
 *
 * @param doc The document.
 * @param offs The offset whose line to get the leading whitespace for.
 * @return The leading whitespace.
 * @throws BadLocationException If <code>offs</code> is not a valid offset
 *         in the document.
 * @see #getLeadingWhitespace(String)
 */
public static String getLeadingWhitespace(Document doc, int offs)
                throws BadLocationException {
  Element root = doc.getDefaultRootElement();
  int line = root.getElementIndex(offs);
  Element elem = root.getElement(line);
  int startOffs = elem.getStartOffset();
  int endOffs = elem.getEndOffset() - 1;
  String text = doc.getText(startOffs, endOffs-startOffs);
  return getLeadingWhitespace(text);
}

代码示例来源：origin: bobbylight/RSyntaxTextArea

/**
 * Returns whether the specified offset is "inside" the fold.  This method
 * returns <code>true</code> if the offset is greater than the fold start
 * offset, and no further than the last offset of the last folded line.
 *
 * @param offs The offset to check.
 * @return Whether the offset is "inside" the fold.
 * @see #containsLine(int)
 */
public boolean containsOffset(int offs) {
  boolean contained = false;
  if (offs>getStartOffset()) {
    // Use Elements to avoid BadLocationExceptions
    Element root = textArea.getDocument().getDefaultRootElement();
    int line = root.getElementIndex(offs);
    contained = line<=getEndLine();
  }
  return contained;
}

代码示例来源：origin: ron190/jsql-injection

/**
 * Get position of the beginning of the line.
 * @param line Index of the line
 * @return Offset of line
 * @throws BadLocationException
 */
public int getLineStartOffset(int line) throws BadLocationException {
  Element map = this.getDocument().getDefaultRootElement();
  if (line < 0) {
    throw new BadLocationException("Negative line", -1);
  } else if (line >= map.getElementCount()) {
    throw new BadLocationException("No such line", this.getDocument().getLength() + 1);
  } else {
    Element lineElem = map.getElement(line);
    return lineElem.getStartOffset();
  }
}

代码示例来源：origin: bobbylight/RSyntaxTextArea

@Override
public void actionPerformedImpl(ActionEvent e, RTextArea textArea) {
  try {
    // We use the elements instead of calling getLineOfOffset(),
    // etc. to speed things up just a tad (i.e. micro-optimize).
    Document document = textArea.getDocument();
    int caretPosition = textArea.getCaretPosition();
    Element map = document.getDefaultRootElement();
    int currentLineNum = map.getElementIndex(caretPosition);
    Element currentLineElement = map.getElement(currentLineNum);
    // Always take -1 as we don't want to remove the newline.
    int currentLineEnd = currentLineElement.getEndOffset()-1;
    if (caretPosition<currentLineEnd) {
      document.remove(caretPosition,
              currentLineEnd-caretPosition);
    }
  } catch (BadLocationException ble) {
    ble.printStackTrace();
  }
}

代码示例来源：origin: bobbylight/RSyntaxTextArea

@Override
public void insertUpdate(DocumentEvent e) {
  // Adding text containing a newline to the visible line of a folded
  // Fold causes that Fold to unfold.  Check only start offset of
  // insertion since that's the line that was "modified".
  int startOffs = e.getOffset();
  int endOffs = startOffs + e.getLength();
  Document doc = e.getDocument();
  Element root = doc.getDefaultRootElement();
  int startLine = root.getElementIndex(startOffs);
  int endLine = root.getElementIndex(endOffs);
  if (startLine!=endLine) { // Inserted text covering > 1 line...
    Fold fold = getFoldForLine(startLine);
    if (fold!=null && fold.isCollapsed()) {
      fold.toggleCollapsedState();
    }
  }
}