web/views/timeline.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 09 Nov 2011 14:34:41 +0100
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# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""basic support for SIMILE's timline widgets
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cf. http://code.google.com/p/simile-widgets/
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"""
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__docformat__ = "restructuredtext en"
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from logilab.mtconverter import xml_escape
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from logilab.common.date import ustrftime
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from cubicweb.selectors import adaptable
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from cubicweb.view import EntityView, StartupView
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from cubicweb.utils import json_dumps
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_ = unicode
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class TimelineJsonView(EntityView):
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    """generates a json file to feed Timeline.loadJSON()
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    NOTE: work in progress (image_url, bubbleUrl and so on
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    should be properties of entity classes or subviews)
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    """
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    __regid__ = 'timeline-json'
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    __select__ = adaptable('ICalendarable')
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    binary = True
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    templatable = False
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    content_type = 'application/json'
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    date_fmt = '%Y/%m/%d'
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    def call(self):
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        events = []
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        for entity in self.cw_rset.entities():
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            event = self.build_event(entity)
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            if event is not None:
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                events.append(event)
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        timeline_data = {'dateTimeFormat': self.date_fmt,
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                         'events': events}
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        self.w(json_dumps(timeline_data))
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    # FIXME: those properties should be defined by the entity class
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    def onclick_url(self, entity):
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        return entity.absolute_url()
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    def onclick(self, entity):
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        url = self.onclick_url(entity)
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        if url:
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            return u"javascript: document.location.href='%s'" % url
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        return None
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    def build_event(self, entity):
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        """converts `entity` into a JSON object
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        {'start': '1891',
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        'end': '1915',
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        'title': 'Portrait of Horace Brodsky',
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        'description': 'by Henri Gaudier-Brzeska, French Sculptor, 1891-1915',
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        'image': 'http://imagecache2.allposters.com/images/BRGPOD/102770_b.jpg',
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        'link': 'http://www.allposters.com/-sp/Portrait-of-Horace-Brodsky-Posters_i1584413_.htm'
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        }
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        """
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        icalendarable = entity.cw_adapt_to('ICalendarable')
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        start = icalendarable.start
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        stop = icalendarable.stop
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        start = start or stop
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        if start is None and stop is None:
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            return None
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        event_data = {'start': ustrftime(start, self.date_fmt),
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                      'title': xml_escape(entity.dc_title()),
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                      'description': entity.dc_description(format='text/html'),
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                      'link': entity.absolute_url(),
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                      }
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        onclick = self.onclick(entity)
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        if onclick:
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            event_data['onclick'] = onclick
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        if stop:
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            event_data['end'] = ustrftime(stop, self.date_fmt)
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        return event_data
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class TimelineViewMixIn(object):
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    widget_class = 'TimelineWidget'
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    jsfiles = ('cubicweb.timeline-bundle.js', 'cubicweb.widgets.js',
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               'cubicweb.timeline-ext.js', 'cubicweb.ajax.js')
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    def render_url(self, loadurl, tlunit=None):
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        tlunit = tlunit or self._cw.form.get('tlunit')
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        self._cw.add_js(self.jsfiles)
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        self._cw.add_css('timeline-bundle.css')
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        if tlunit:
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            additional = u' cubicweb:tlunit="%s"' % tlunit
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        else:
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            additional = u''
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        self.w(u'<div class="widget" cubicweb:wdgtype="%s" '
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               u'cubicweb:loadtype="auto" cubicweb:loadurl="%s" %s >' %
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               (self.widget_class, xml_escape(loadurl),
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                additional))
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        self.w(u'</div>')
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class TimelineView(TimelineViewMixIn, EntityView):
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    """builds a cubicweb timeline widget node"""
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    __regid__ = 'timeline'
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    title = _('timeline')
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   121
    __select__ = adaptable('ICalendarable')
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   122
    paginable = False
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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   123
    def call(self, tlunit=None):
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6b46d73823f5 [api] work in progress, use __regid__, cw_*, etc.
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 3377
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   124
        self._cw.html_headers.define_var('Timeline_urlPrefix', self._cw.datadir_url)
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parents: 3377
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   125
        rql = self.cw_rset.printable_rql()
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e4843535db25 [api] some more _cw / __regid__, automatic tests now pass again
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 3451
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   126
        loadurl = self._cw.build_url(rql=rql, vid='timeline-json')
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sylvain.thenault@logilab.fr
parents: 1093
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   127
        self.render_url(loadurl, tlunit)
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   128
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parents: 1093
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   129
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   130
class StaticTimelineView(TimelineViewMixIn, StartupView):
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    """similar to `TimelineView` but loads data from a static
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    JSON file instead of one after a RQL query.
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    """
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parents: 2312
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   134
    __regid__ = 'static-timeline'
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parents: 1093
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   135
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    def call(self, loadurl, tlunit=None, wdgclass=None):
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   137
        self.widget_class = wdgclass or self.widget_class
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parents: 1093
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   138
        self.render_url(loadurl, tlunit)