##
13.7.2 DOM Example

This example program is a fairly realistic example of a simple program. In this particular case, we do not take much advantage of the flexibility of the DOM.

    import xml.dom.minidom

    document = """\
    <slideshow>
    <title>Demo slideshow</title>
    <slide><title>Slide title</title>
    <point>This is a demo</point>
    <point>Of a program for processing slides</point>
    </slide>

    <slide><title>Another demo slide</title>
    <point>It is important</point>
    <point>To have more than</point>
    <point>one slide</point>
    </slide>
    </slideshow>
    """

    dom = xml.dom.minidom.parseString(document)

    def getText(nodelist):
        rc = ""
        for node in nodelist:
            if node.nodeType == node.TEXT_NODE:
                rc = rc + node.data
        return rc

    def handleSlideshow(slideshow):
        print "<html>"
        handleSlideshowTitle(slideshow.getElementsByTagName("title")[0])
        slides = slideshow.getElementsByTagName("slide")
        handleToc(slides)
        handleSlides(slides)
        print "</html>"

    def handleSlides(slides):
        for slide in slides:
           handleSlide(slide)

    def handleSlide(slide):
        handleSlideTitle(slide.getElementsByTagName("title")[0])
        handlePoints(slide.getElementsByTagName("point"))

    def handleSlideshowTitle(title):
        print "<title>%s</title>" % getText(title.childNodes)

    def handleSlideTitle(title):
        print "<h2>%s</h2>" % getText(title.childNodes)

    def handlePoints(points):
        print "<ul>"
        for point in points:
            handlePoint(point)
        print "</ul>"

    def handlePoint(point):
        print "<li>%s</li>" % getText(point.childNodes)

    def handleToc(slides):
        for slide in slides:
            title = slide.getElementsByTagName("title")[0]
            print "<p>%s</p>" % getText(title.childNodes)

    handleSlideshow(dom)