"""base classes to handle tabbed views

:organization: Logilab

:copyright: 2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr

"""

__docformat__ = "restructuredtext en"

from logilab.mtconverter import html_escape

from cubicweb import NoSelectableObject, role

from cubicweb.common.view import EntityView

from cubicweb.common.selectors import has_related_entities

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 or ''

        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):

        cookie = self.req.get_cookie()

        if activetab is None:

            tab = default

        else:

            tab = activetab.value

        return tab in tabs and tab or default

    def prune_tabs(self, tabs):

        selected_tabs = []

        for tab in tabs:

            try:

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

                selected_tabs.append(tab)

            except NoSelectableObject:

                continue

        return selected_tabs

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

        self.req.add_css('ui.tabs.css')

        self.req.add_js(('ui.core.js', 'ui.tabs.js', 'cubicweb.tabs.js', 'cubicweb.lazy.js'))

        # prune tabs : not all are to be shown

        tabs = self.prune_tabs(tabs)

        # select a tab

        active_tab = self.active_tab(tabs, default)

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

 jQuery(document).ready(function() {

   jQuery('#entity-tabs > ul').tabs( { selected: %(tabindex)s });

   set_tab('%(vid)s');

 });

 """ % {'tabindex' : tabs.index(active_tab),

        'vid'      : active_tab})

        # build the html structure

        w = self.w

        w(u'<div id="entity-tabs">')

        w(u'<ul>')

        for tab in tabs:

            w(u'<li>')

            w(u'<a href="#as-%s">' % tab)

            w(u'<span onclick="set_tab(\'%s\')">' % tab)

            w(self.req._(tab))

            w(u'</span>')

            w(u'</a>')

            w(u'</li>')

        w(u'</ul>')

        w(u'</div>')

        for tab in tabs:

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

            self.lazyview(tab, entity.eid)

            w(u'</div>')

from cubicweb.web.views.basecontrollers import JSonController

def js_remember_active_tab(self, tabname):

    cookie = self.req.get_cookie()

def js_lazily(self, vid_eid):

    vid, eid = vid_eid.split('-')

    rset = eid and self.req.eid_rset(eid) or None

    view = self.vreg.select_view(vid, self.req, rset)

    return self._set_content_type(view, view.dispatch())

JSonController.js_remember_active_tab = js_remember_active_tab

JSonController.js_lazily = js_lazily

class EntityRelatedTab(EntityView):

    """A view you should inherit from leftmost,

    to wrap another actual view displaying entity related stuff.

    Such a view _must_ provide the rtype, target and vid attributes :

    Example :

    class ProjectScreenshotsView(EntityRelationView):

        "display project's screenshots"

        id = title = _('projectscreenshots')

        accepts = ('Project',)

        rtype = 'screenshot'

        target = 'object'

        vid = 'gallery'

        __selectors__ = EntityRelationView.__selectors__ + (one_line_rset,)

    This is the view we want to have in a tab, only if there is something to show.

    Then, just define as below, and declare this being the tab content :

    class ProjectScreenshotTab(DataDependantTab, ProjectScreenshotsView):

        id = 'screenshots_tab'

    """

    __selectors__ = EntityView.__selectors__ + (has_related_entities,)

    vid = 'list'

    def cell_call(self, row, col):

        rset = self.rset.get_entity(row, col).related(self.rtype, role(self))

        self.w(u'<div class="mainInfo">')

        self.wview(self.vid, rset, 'noresult')

        self.w(u'</div>')