from cubicweb.common.utils import HTMLHead

# the prepend hack only work for 1-level lazy views

# a whole lot different thing must be done otherwise

def prepend_post_inline_script(self, content):

    self.post_inlined_scripts.insert(0, content)

HTMLHead.prepend_post_inline_script = prepend_post_inline_script

class LazyViewMixin(object):

    def lazyview(self, vid, eid=None, show_spinbox=True, w=None):

        """a lazy version of wview

        first version only support lazy viewing for an entity at a time

        """

        w = w or self.w

        self.req.add_js('cubicweb.lazy.js')

        eid = eid if eid else ''

        w(u'<div id="lazy-%s" cubicweb__loadurl="%s-%s">' % (vid, vid, eid))

        if show_spinbox:

            w(u'<img src="data/loading.gif" id="%s-hole"/>' % vid)

        w(u'</div>')

        self.req.html_headers.prepend_post_inline_script(u"""

jQuery(document).ready(function () {

  $('#lazy-%(vid)s').bind('%(event)s', function(event) {

     load_now('#lazy-%(vid)s', '#%(vid)s-hole');

  });});""" % {'event' : 'load_%s' % vid,

               'vid' : vid})

    def forceview(self, vid):

        """trigger an event that will force immediate loading of the view

        on dom readyness

        """

        self.req.add_js('.lazy.js')

        self.req.html_headers.add_post_inline_script(u"""

jQuery(document).ready(function() {

  trigger_load('%(vid)s');})

""" % {'vid' : vid})

class TabsMixin(LazyViewMixin):

    def active_tab(self, tabs, default):

        tab = activetab.value

        return tab if tab in tabs else default

    def render_tabs(self, tabs, default, entity):

        active_tab = self.active_tab(tabs, default)

                tabview = self.vreg.select_view(tab, self.req, self.rset)

                self.info('no selectable view for id %s', tab)

        for tab in tabs:

            w(u'<div id="as-%s">' % tab)

            self.lazyview(tab, entity.eid)

            w(u'</div>')