com.aspose.words

Example:

public void layoutEnumerator() throws Exception {
    // Open a document that contains a variety of layout entities.
    // Layout entities are pages, cells, rows, lines, and other objects included in the LayoutEntityType enum.
    // Each layout entity has a rectangular space that it occupies in the document body.
    Document doc = new Document(getMyDir() + "Layout entities.docx");

    // Create an enumerator that can traverse these entities like a tree.
    LayoutEnumerator layoutEnumerator = new LayoutEnumerator(doc);

    Assert.assertEquals(doc, layoutEnumerator.getDocument());

    layoutEnumerator.moveParent(LayoutEntityType.PAGE);

    Assert.assertEquals(LayoutEntityType.PAGE, layoutEnumerator.getType());
    Assert.assertThrows(IllegalStateException.class, () -> System.out.println(layoutEnumerator.getText()));

    // We can call this method to make sure that the enumerator will be at the first layout entity.
    layoutEnumerator.reset();

    // There are two orders that determine how the layout enumerator continues traversing layout entities
    // when it encounters entities that span across multiple pages.
    // 1 -  In visual order:
    // When moving through an entity's children that span multiple pages,
    // page layout takes precedence, and we move to other child elements on this page and avoid the ones on the next.
    System.out.println("Traversing from first to last, elements between pages separated:");
    traverseLayoutForward(layoutEnumerator, 1);

    // Our enumerator is now at the end of the collection. We can traverse the layout entities backwards to go back to the beginning.
    System.out.println("Traversing from last to first, elements between pages separated:");
    traverseLayoutBackward(layoutEnumerator, 1);

    // 2 -  In logical order:
    // When moving through an entity's children that span multiple pages,
    // the enumerator will move between pages to traverse all the child entities.
    System.out.println("Traversing from first to last, elements between pages mixed:");
    traverseLayoutForwardLogical(layoutEnumerator, 1);

    System.out.println("Traversing from last to first, elements between pages mixed:");
    traverseLayoutBackwardLogical(layoutEnumerator, 1);
}

/// <summary>
/// Enumerate through layoutEnumerator's layout entity collection front-to-back,
/// in a depth-first manner, and in the "Visual" order.
/// </summary>
private static void traverseLayoutForward(LayoutEnumerator layoutEnumerator, int depth) throws Exception {
    do {
        printCurrentEntity(layoutEnumerator, depth);

        if (layoutEnumerator.moveFirstChild()) {
            traverseLayoutForward(layoutEnumerator, depth + 1);
            layoutEnumerator.moveParent();
        }
    } while (layoutEnumerator.moveNext());
}

/// <summary>
/// Enumerate through layoutEnumerator's layout entity collection back-to-front,
/// in a depth-first manner, and in the "Visual" order.
/// </summary>
private static void traverseLayoutBackward(LayoutEnumerator layoutEnumerator, int depth) throws Exception {
    do {
        printCurrentEntity(layoutEnumerator, depth);

        if (layoutEnumerator.moveLastChild()) {
            traverseLayoutBackward(layoutEnumerator, depth + 1);
            layoutEnumerator.moveParent();
        }
    } while (layoutEnumerator.movePrevious());
}

/// <summary>
/// Enumerate through layoutEnumerator's layout entity collection front-to-back,
/// in a depth-first manner, and in the "Logical" order.
/// </summary>
private static void traverseLayoutForwardLogical(LayoutEnumerator layoutEnumerator, int depth) throws Exception {
    do {
        printCurrentEntity(layoutEnumerator, depth);

        if (layoutEnumerator.moveFirstChild()) {
            traverseLayoutForwardLogical(layoutEnumerator, depth + 1);
            layoutEnumerator.moveParent();
        }
    } while (layoutEnumerator.moveNextLogical());
}

/// <summary>
/// Enumerate through layoutEnumerator's layout entity collection back-to-front,
/// in a depth-first manner, and in the "Logical" order.
/// </summary>
private static void traverseLayoutBackwardLogical(LayoutEnumerator layoutEnumerator, int depth) throws Exception {
    do {
        printCurrentEntity(layoutEnumerator, depth);

        if (layoutEnumerator.moveLastChild()) {
            traverseLayoutBackwardLogical(layoutEnumerator, depth + 1);
            layoutEnumerator.moveParent();
        }
    } while (layoutEnumerator.movePreviousLogical());
}

/// <summary>
/// Print information about layoutEnumerator's current entity to the console, while indenting the text with tab characters
/// based on its depth relative to the root node that we provided in the constructor LayoutEnumerator instance.
/// The rectangle that we process at the end represents the area and location that the entity takes up in the document.
/// </summary>
private static void printCurrentEntity(LayoutEnumerator layoutEnumerator, int indent) throws Exception {
    String tabs = StringUtils.repeat("\t", indent);

    System.out.println(layoutEnumerator.getKind().equals("")
            ? MessageFormat.format("{0}-> Entity type: {1}", tabs, layoutEnumerator.getType())
            : MessageFormat.format("{0}-> Entity type & kind: {1}, {2}", tabs, layoutEnumerator.getType(), layoutEnumerator.getKind()));

    // Only spans can contain text.
    if (layoutEnumerator.getType() == LayoutEntityType.SPAN)
        System.out.println("{tabs}   Span contents: \"{layoutEnumerator.Text}\"");

    Rectangle2D.Float leRect = layoutEnumerator.getRectangle();
    System.out.println(MessageFormat.format("{0}   Rectangle dimensions {1}x{2}, X={3} Y={4}", tabs, leRect.getWidth(), leRect.getHeight(), leRect.getX(), leRect.getY()));
    System.out.println(MessageFormat.format("{0}   Page {1}", tabs, layoutEnumerator.getPageIndex()));
}