Examples of javax.swing.text.Element

javax.swing.text.Element
Interface to describe a structural piece of a document. It is intended to capture the spirit of an SGML element. @author Timothy Prinzing

   */
  public void test(TestHarness harness)
  {
    h2 = harness;
    DefaultStyledDocument doc = new ElementStructure2();
    Element root = doc.getDefaultRootElement();
    try
      {
        // Add some regular text
        doc.insertString(0, "the quick brown fox", null);
        doc.insertString(6, "MIDDLE", null);

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    try
      {
        h2 = harness;
        ElementStructure4 doc = new ElementStructure4();
        SimpleAttributeSet atts = new SimpleAttributeSet();
        Element root = doc.getDefaultRootElement();


        // Add strike trough text.
        atts.addAttribute(StyleConstants.StrikeThrough, Boolean.TRUE);
        doc.insertString(0, "Strike through text.\n", atts);
        atts.removeAttributes(atts);
        harness.checkPoint("after first insertion");
        harness.check(root.getElementCount(), 2);
        harness.check(root.getElement(0).getStartOffset(), 0);
        harness.check(root.getElement(0).getEndOffset(), 21);
        harness.check(root.getElement(1).getStartOffset(), 21);
        harness.check(root.getElement(1).getEndOffset(), 22);


        // Add plain text in front.
        doc.insertString(0, "a", null);
        harness.checkPoint("after second insertion");
        harness.check(root.getElement(0).getElementCount() == 2);
        harness.check(root.getElement(1).getElementCount() == 1);


        doc.insertString(1, "b", null);
        harness.checkPoint("after second insertion");
        harness.check(root.getElement(0).getElementCount() == 2);
        harness.check(root.getElement(1).getElementCount() == 1);


        harness.checkPoint("final structure");
        Element first = root.getElement(0).getElement(0);
        harness.check(first.getStartOffset() == 0);
        harness.check(first.getEndOffset() == 2);


        Element second = root.getElement(0).getElement(1);
        harness.check(second.getStartOffset() == 2);
        harness.check(second.getEndOffset() == 23);
        // printElements(doc.getDefaultRootElement(), 0);
      }
    catch (Exception t)
      {
        // t.printStackTrace();

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      }
    catch (BadLocationException ex)
      {
         h.fail(ex.getMessage());
      }
    Element root = doc.getDefaultRootElement();
    h.check(root.getElementIndex(6), 1);
  }

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    // Create the precondition, two elements [Hello], one at 0 and one at 5.
    doc.insert(0, specs);
    doc.insert(5, specs);


    // Check precondition. (3 child elements).
    Element root = doc.getDefaultRootElement();
    Element par = root.getElement(0);
    h.check(par.getElementCount(), 3);
    
    // Now check what comes out when we insert one element at 5.
    doc.insert(5, specs);


    // We have one paragraph in the root element.
    root = doc.getDefaultRootElement();
    h.check(root.getElementCount(), 1);


    // We should now have 4 children in the paragraph.
    par = root.getElement(0);
    h.check(par.getElementCount(), 4);
    Element el1 = par.getElement(0);
    h.check(el1.getStartOffset(), 0);
    h.check(el1.getEndOffset(), 5);
    Element el2 = par.getElement(1);
    h.check(el2.getStartOffset(), 5);
    h.check(el2.getEndOffset(), 10);
    Element el3 = par.getElement(2);
    h.check(el3.getStartOffset(), 10);
    h.check(el3.getEndOffset(), 15);


    // Now check the document event that was fired.
    // No changes for the root.
    DocumentEvent.ElementChange ec = documentEvent.getChange(root);
    h.check(ec, null);

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    // Now check what comes out when we insert one element at 2.
    doc.insert(2, specs);


    // We have one paragraph in the root element.
    Element root = doc.getDefaultRootElement();
    h.check(root.getElementCount(), 1);


    // We should now have 5 children in the paragraph.
    Element par = root.getElement(0);
    h.check(par.getElementCount(), 5);
    Element el1 = par.getElement(0);
    h.check(el1.getStartOffset(), 0);
    h.check(el1.getEndOffset(), 2);
    Element el2 = par.getElement(1);
    h.check(el2.getStartOffset(), 2);
    h.check(el2.getEndOffset(), 7);
    Element el3 = par.getElement(2);
    h.check(el3.getStartOffset(), 7);
    h.check(el3.getEndOffset(), 10);
    Element el4 = par.getElement(3);
    h.check(el4.getStartOffset(), 10);
    h.check(el4.getEndOffset(), 15);


    // Now check the document event that was fired.
    // No changes for the root.
    DocumentEvent.ElementChange ec = documentEvent.getChange(root);
    h.check(ec, null);

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    // Now check what comes out when we insert one element at 7.
    doc.insert(7, specs);


    // We have one paragraph in the root element.
    Element root = doc.getDefaultRootElement();
    h.check(root.getElementCount(), 1);


    // We should now have 5 children in the paragraph.
    Element par = root.getElement(0);
    h.check(par.getElementCount(), 5);
    Element el1 = par.getElement(0);
    h.check(el1.getStartOffset(), 0);
    h.check(el1.getEndOffset(), 5);
    Element el2 = par.getElement(1);
    h.check(el2.getStartOffset(), 5);
    h.check(el2.getEndOffset(), 7);
    Element el3 = par.getElement(2);
    h.check(el3.getStartOffset(), 7);
    h.check(el3.getEndOffset(), 12);
    Element el4 = par.getElement(3);
    h.check(el4.getStartOffset(), 12);
    h.check(el4.getEndOffset(), 15);


    // Now check the document event that was fired.
    // No changes for the root.
    DocumentEvent.ElementChange ec = documentEvent.getChange(root);
    h.check(ec, null);

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    spec.setDirection(TestDocument.ElementSpec.JoinPreviousDirection);
    documentEvent = null;
    doc.insert(5, specs);


    // We have one paragraph in the root element.
    Element root = doc.getDefaultRootElement();
    h.check(root.getElementCount(), 1);


    // We should now have 3 children in the paragraph.
    Element par = root.getElement(0);
    h.check(par.getElementCount(), 3);
    Element el1 = par.getElement(0);
    h.check(el1.getStartOffset(), 0);
    h.check(el1.getEndOffset(), 10);
    Element el2 = par.getElement(1);
    h.check(el2.getStartOffset(), 10);
    h.check(el2.getEndOffset(), 15);


    // No changes for the document.
    // TODO: The document event here is an InsertUndo from GapContent.
    // We currently don't have such thing and return null.
    // h.check(documentEvent, null);

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    spec.setDirection(TestDocument.ElementSpec.JoinPreviousDirection);
    documentEvent = null;
    doc.insert(2, specs);


    // We have one paragraph in the root element.
    Element root = doc.getDefaultRootElement();
    h.check(root.getElementCount(), 1);


    // We should now have 3 children in the paragraph.
    Element par = root.getElement(0);
    h.check(par.getElementCount(), 3);
    Element el1 = par.getElement(0);
    h.check(el1.getStartOffset(), 0);
    h.check(el1.getEndOffset(), 10);
    Element el2 = par.getElement(1);
    h.check(el2.getStartOffset(), 10);
    h.check(el2.getEndOffset(), 15);


    // No changes for the document.
    // TODO: The document event here is an InsertUndo from GapContent.
    // We currently don't have such thing and return null.
    // h.check(documentEvent, null);

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    spec.setDirection(TestDocument.ElementSpec.JoinPreviousDirection);
    documentEvent = null;
    doc.insert(7, specs);


    // We have one paragraph in the root element.
    Element root = doc.getDefaultRootElement();
    h.check(root.getElementCount(), 1);


    // We should now have 5 children in the paragraph.
    Element par = root.getElement(0);
    h.check(par.getElementCount(), 3);
    Element el1 = par.getElement(0);
    h.check(el1.getStartOffset(), 0);
    h.check(el1.getEndOffset(), 5);
    Element el2 = par.getElement(1);
    h.check(el2.getStartOffset(), 5);
    h.check(el2.getEndOffset(), 15);


    // No changes for the document.
    // TODO: The document event here is an InsertUndo from GapContent.
    // We currently don't have such thing and return null.
    // h.check(documentEvent, null);

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    // Now check what comes out when we insert one element at 5.
    spec.setDirection(TestDocument.ElementSpec.JoinNextDirection);
    doc.insert(5, specs);


    // We have one paragraph in the root element.
    Element root = doc.getDefaultRootElement();
    h.check(root.getElementCount(), 1);


    // We should now have 3 children in the paragraph.
    Element par = root.getElement(0);
    h.check(par.getElementCount(), 3);
    Element el1 = par.getElement(0);
    h.check(el1.getStartOffset(), 0);
    h.check(el1.getEndOffset(), 5);
    Element el2 = par.getElement(1);
    h.check(el2.getStartOffset(), 5);
    h.check(el2.getEndOffset(), 15);


    // Now check the document event that was fired.
    // No changes for the root.
    DocumentEvent.ElementChange ec = documentEvent.getChange(root);
    h.check(ec, null);

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