Examples of javax.swing.text.Document

javax.swing.text.Document
nicode.org/">unicode characters. The sequence of characters displayed in a text component is generally referred to as the component's content.
To refer to locations within the sequence, the coordinates used are the location between two characters. As the diagram below shows, a location in a text document can be referred to as a position, or an offset. This position is zero-based.

In the example, if the content of a document is the sequence "The quick brown fox," as shown in the preceding diagram, the location just before the word "The" is 0, and the location after the word "The" and before the whitespace that follows it is 3. The entire sequence of characters in the sequence "The" is called a range.
The following methods give access to the character data that makes up the content.
- {@link #getLength()}
- {@link #getText(int,int)}
- {@link #getText(int,int,javax.swing.text.Segment)}
Structure
Text is rarely represented simply as featureless content. Rather, text typically has some sort of structure associated with it. Exactly what structure is modeled is up to a particular Document implementation. It might be as simple as no structure (i.e. a simple text field), or it might be something like diagram below.

The unit of structure (i.e. a node of the tree) is referred to by the Element interface. Each Element can be tagged with a set of attributes. These attributes (name/value pairs) are defined by the AttributeSet interface.
The following methods give access to the document structure.
- {@link #getDefaultRootElement()}
- {@link #getRootElements()}
Mutations
All documents need to be able to add and remove simple text. Typically, text is inserted and removed via gestures from a keyboard or a mouse. What effect the insertion or removal has upon the document structure is entirely up to the implementation of the document.
The following methods are related to mutation of the document content:
- {@link #insertString(int,java.lang.String,javax.swing.text.AttributeSet)}
- {@link #remove(int,int)}
- {@link #createPosition(int)}
Notification
Mutations to the Document must be communicated to interested observers. The notification of change follows the event model guidelines that are specified for JavaBeans. In the JavaBeans event model, once an event notification is dispatched, all listeners must be notified before any further mutations occur to the source of the event. Further, order of delivery is not guaranteed.
Notification is provided as two separate events, DocumentEvent, and UndoableEditEvent. If a mutation is made to a Document through its api, a DocumentEvent will be sent to all of the registered DocumentListeners. If the Document implementation supports undo/redo capabilities, an UndoableEditEvent will be sent to all of the registered UndoableEditListeners. If an undoable edit is undone, a DocumentEvent should be fired from the Document to indicate it has changed again. In this case however, there should be no UndoableEditEvent generated since that edit is actually the source of the change rather than a mutation to the Document made through its api.

Referring to the above diagram, suppose that the component shown on the left mutates the document object represented by the blue rectangle. The document responds by dispatching a DocumentEvent to both component views and sends an UndoableEditEvent to the listening logic, which maintains a history buffer.
Now suppose that the component shown on the right mutates the same document. Again, the document dispatches a DocumentEvent to both component views and sends an UndoableEditEvent to the listening logic that is maintaining the history buffer.
If the history buffer is then rolled back (i.e. the last UndoableEdit undone), a DocumentEvent is sent to both views, causing both of them to reflect the undone mutation to the document (that is, the removal of the right component's mutation). If the history buffer again rolls back another change, another DocumentEvent is sent to both views, causing them to reflect the undone mutation to the document -- that is, the removal of the left component's mutation.
The methods related to observing mutations to the document are:
Properties
Document implementations will generally have some set of properties associated with them at runtime. Two well known properties are the StreamDescriptionProperty, which can be used to describe where the Document came from, and the TitleProperty, which can be used to name the Document. The methods related to the properties are:
- {@link #getProperty(java.lang.Object)}
- {@link #putProperty(java.lang.Object,java.lang.Object)}
For more information on the Document class, see The Swing Connection and most particularly the article, The Element Interface. @author Timothy Prinzing @see javax.swing.event.DocumentEvent @see javax.swing.event.DocumentListener @see javax.swing.event.UndoableEditEvent @see javax.swing.event.UndoableEditListener @see Element @see Position @see AttributeSet

        if ( this.isVisible() ) {
            backward = this.backwordRadioButton.isSelected(); 
        }


        int startPosition = this.textComponent.getCaretPosition();
        Document doc = this.textComponent.getDocument();
        int len = doc.getLength();


        String content = "";
        try {
            if (backward) {
                content = doc.getText(0, startPosition > 1 ? startPosition - 1 : 0);
                startPosition = 0;
            } else if ( this.isVisible() && this.entireScopeRadioButton.isSelected() ) {
                content = doc.getText(0, len);
                startPosition = 0;
            } else {
                content = doc.getText(startPosition, len - startPosition);
            }
        } catch (BadLocationException e) {
            e.printStackTrace();
            return false;
        }

View Full Code Here

    
    URLSelection getIndicatedURL(Point pt, JEditorPane editor) {
  int pos = editor.viewToModel(pt);
  if (pos >= 0) {
      try {
    Document doc = editor.getDocument();
    int docLength = doc.getLength();
    
    int wordStart = 0;
    
    int startOffset = pos;
    int relativePosition;
    boolean startFound = false;
    
    while ( ! startFound ) {
        startOffset = startOffset - lineLength;
        relativePosition = lineLength;
        
        if (startOffset < 0) {
      relativePosition = relativePosition + startOffset;
      startOffset = 0;
        }
        
        String possibleText = doc.getText(startOffset, relativePosition);
        char[] charArray = possibleText.toCharArray();
        for (int i = relativePosition - 1; (! startFound && i >= 0 ) ; i--) {  
      if (Character.isWhitespace(charArray[i]) || charArray[i] == '(' || charArray[i] == ')' || charArray[i] == '<' || charArray[i] == '>') {
          startFound = true;
          wordStart = startOffset + i + 1;
      }
        }
        
        if (startOffset == 0)
      startFound = true;
    }
    
    int wordEnd = docLength - 1;
    startOffset = pos - 1 - lineLength;
    int length = lineLength;
    boolean endFound = false;
    
    while ( ! endFound ) {
        startOffset = startOffset + lineLength;
        
        if (startOffset + lineLength > docLength) {
      length = docLength - startOffset;
        } 
        
        String possibleText = doc.getText(startOffset, length);
        char[] charArray = possibleText.toCharArray();
        for (int i = 0; (! endFound && i < length ) ; i++) {  
      if (Character.isWhitespace(charArray[i]) || charArray[i] == '(' || charArray[i] == ')' || charArray[i] == '<' || charArray[i] == '>') {
          endFound = true;
          wordEnd = startOffset + i - 1;
      }
        }
        
        if (startOffset + length >= docLength)
      endFound = true;
    }
    
    int wordLength = wordEnd - wordStart + 1;
    if (wordLength > 3) {
        String word = doc.getText(wordStart, wordLength);
        if (word.indexOf("://") != -1) {
      try {
          URL urlSelected = new URL(word);
          
          return new URLSelection(editor, urlSelected, wordStart, wordEnd);

View Full Code Here

   * Insert a header.
   * 
   * @param header 
   */
  protected void insertHeader(final String header) {
    final Document doc = textPane.getDocument();
    try {
      if (header.length() > 0) {
        doc.insertString(doc.getLength(), "<" + header + "> ",
            textPane.getStyle("header"));
      }
    } catch (final BadLocationException e) {
      logger.error("Couldn't insert initial text.", e);
    }

View Full Code Here

   * Insert time stamp.
   * 
   * @param header time stamp
   */
  protected void insertTimestamp(final String header) {
    final Document doc = textPane.getDocument();
    try {
      if (header.length() > 0) {
        doc.insertString(doc.getLength(), header,
            textPane.getStyle("timestamp"));
      }
    } catch (final BadLocationException e) {
      logger.error("Couldn't insert initial text.", e);
    }

View Full Code Here

   * @param type
   */
  protected void insertText(final String text, final NotificationType type) {
    final Color color = type.getColor();
    final String styleDescription = type.getStyleDescription();
    final Document doc = textPane.getDocument();


    try {
      final FormatTextParser parser =  new FormatTextParser() {
        @Override
        public void normalText(final String txt) throws BadLocationException {
          doc.insertString(doc.getLength(), txt, getStyle(color,styleDescription));
        }


        @Override
        public void colorText(final String txt) throws BadLocationException {
          doc.insertString(doc.getLength(), txt, textPane.getStyle("bold"));
        }
      };
      parser.format(text);
    } catch (final Exception e) { 
      // BadLocationException

View Full Code Here


  /**
   * Start a new line.
   */
  protected void insertNewline() {
    final Document doc = textPane.getDocument();
    try {
      doc.insertString(doc.getLength(), "\r\n", getStyle(Color.black, "normal"));
    } catch (final BadLocationException e) {
      logger.error("Couldn't insert initial text.", e);
    }
  }

View Full Code Here

    PpiComboBox() {
        setEditable(true);
        addActionListener(this);


        JTextComponent text = getTextComponent();
        Document doc = text.getDocument();
        doc.addDocumentListener(this);


        Font font = (new JTextField()).getFont();
        setFont(font);
        text.setFont(font);

View Full Code Here


    private Listener listener;


    ScaleTextField() {
        setInputVerifier(new NumberVerifier());
        Document doc = getDocument();
        doc.addDocumentListener(this);
        setFixedSize();
        setHorizontalAlignment(RIGHT);
        addFocusListener(FocusSelector);
        registerKeyboardActions();
    }

View Full Code Here

    private Listener listener;
    private NumberFormat format;


    DimensionTextField() {
        setInputVerifier(new NumberVerifier());
        Document doc = getDocument();
        doc.addDocumentListener(this);
        format = InchFormat;
        setFixedSize();
        setHorizontalAlignment(RIGHT);
        addFocusListener(FocusSelector);
        registerKeyboardActions();

View Full Code Here

        setRows(clipRowCount(getRows()));
    }


    @Override
    public void setDocument(Document doc) {
        Document document = getDocument();
        if (document != null && _listener != null) {
            document.removeDocumentListener(_listener);
        }
        super.setDocument(doc);
        if (doc != null) {
            if (_listener == null) {
                _listener = new ResizingDocumentListener();

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of javax.swing.text.Document

com.boxysystems.scriptmonkey.intellij.ui.ScriptShellPanel

com.GestDB.swing.gestEditor

com.inet.jortho.AutoSpellChecker

com.qspin.qtaste.ui.jedit.LineNumberPanel

com.sun.grid.installer.gui.HelpFrame

com.sun.swingset3.codeview.SnippetHighlighter

de.FBEditor.struct.JTextPane2

de.sciss.swingosc.TextView

DisplayProject.actions.MaxCharacters

DisplayProject.controls.MultiLineTextFieldLeftColumn

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.