def update_page(self, page_id, new_idevice_id = None, new_idevice_cssclass = None, new_idevice_type = None):
"""Regenerate script and link elements as they are required for the idevices on the page"""
page_path = self._get_page_path(page_id)
#According to the epub spec: contents MUST be XHTML not just HTML
page_html_el = etree.parse(page_path).getroot()
ns_xhtml = page_html_el.nsmap.get(None)
#check and see if we need to add the div dom element for the new idevice
if new_idevice_id is not None:
from exe.engine.epubpackage import EPUBPackage
idevice_container_el = EPUBPackage.get_idevice_container_el(page_html_el)
idevice_div_el = etree.SubElement(idevice_container_el, "{%s}div" % ns_xhtml)
idevice_div_el.set("id", "id%s" % new_idevice_id)
idevice_div_el.set("class", new_idevice_cssclass)
idevice_div_el.set("data-idevice-type", new_idevice_type)
idevice_div_el.text = " "
page_idevice_els = page_html_el.findall(".//{%s}*[@data-idevice-type]" % ns_xhtml)
required_css = []
required_js = []
for idevice in page_idevice_els:
idevice_type = idevice.get("data-idevice-type")
idevice_def_el = self.get_idevice_el(idevice_type)[1]
self.get_idevice_required_files(idevice_def_el, res_types=["css"], required_files = required_css)
self.get_idevice_required_files(idevice_def_el, res_types=["script"], required_files = required_js)
#now build the resource list, remove any existing generated script and link elements, add ones we need
page_head_el = page_html_el.find("./{%s}head" % ns_xhtml)
for auto_item in page_head_el.findall(".//{%s}*[@data-exeres='true']" % ns_xhtml):
auto_item.getparent().remove(auto_item)
for css_file in required_css:
link_el = etree.SubElement(page_head_el, "{%s}link" % ns_xhtml)
link_el.set("rel", "stylesheet")
link_el.set("type", "text/css")
link_el.set("href", css_file)
link_el.set("data-exeres", "true")
for js_script in required_js:
script_el = etree.SubElement(page_head_el, "{%s}script" % ns_xhtml)
script_el.set("src", js_script)
script_el.set("type", "text/javascript")
script_el.set("data-exeres", "true")
script_el.text = "\n"
"""
EPUBResourceManager.clean_html_el(page_html_el)
updated_src = etree.tostring(page_html_el, encoding="UTF-8", pretty_print = True)
page_fd = open(page_path, "w")
page_fd.write(updated_src)
page_fd.flush()
page_fd.close()
"""
self.save_page(page_html_el, page_path)
