Method setCode

app/src/processing/app/ui/Editor.java:1798–1890

Switch between tabs, this swaps out the Document object that's currently being manipulated.

(SketchCode code)

   * that's currently being manipulated.
   */
  public void setCode(SketchCode code) {
    SyntaxDocument document = (SyntaxDocument) code.getDocument();

    if (document == null) {  // this document not yet inited
      document = new SyntaxDocument() {
        @Override
        public void beginCompoundEdit() {
          if (compoundEdit == null)
            startCompoundEdit();
          super.beginCompoundEdit();
        }

        @Override
        public void endCompoundEdit() {
          stopCompoundEdit();
          super.endCompoundEdit();
        }
      };
      code.setDocument(document);

      // turn on syntax highlighting
      document.setTokenMarker(mode.getTokenMarker(code));

      // insert the program text into the document object
      try {
        document.insertString(0, code.getProgram(), null);
      } catch (BadLocationException bl) {
        bl.printStackTrace();
      }

      // set up this guy's own undo manager
//      code.undo = new UndoManager();

      document.addDocumentListener(new DocumentListener() {

        public void removeUpdate(DocumentEvent e) {
          if (isInserting && isDirectEdit() && !textarea.isOverwriteEnabled()) {
            endTextEditHistory();
          }
          isInserting = false;
        }

        public void insertUpdate(DocumentEvent e) {
          if (!isInserting && !textarea.isOverwriteEnabled() && isDirectEdit()) {
            endTextEditHistory();
          }

          if (!textarea.isOverwriteEnabled()) {
            isInserting = true;
          }
        }

        public void changedUpdate(DocumentEvent e) {
          endTextEditHistory();
        }
      });

      // connect the undo listener to the editor