web/views/ibreadcrumbs.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Thu, 18 Jun 2009 09:38:32 +0200
branchstable
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"""navigation components definition for CubicWeb web client
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:organization: Logilab
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:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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_ = unicode
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from logilab.mtconverter import html_escape
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# don't use AnyEntity since this may cause bug with isinstance() due to reloading
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from cubicweb.interfaces import IBreadCrumbs
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from cubicweb.selectors import match_context_prop, one_line_rset, implements
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from cubicweb.entity import Entity
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from cubicweb.view import EntityView
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from cubicweb.common.uilib import cut
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from cubicweb.web.component import EntityVComponent
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def bc_title(entity):
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    textsize = entity.req.property_value('navigation.short-line-size')
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    return html_escape(cut(entity.dc_title(), textsize))
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class BreadCrumbEntityVComponent(EntityVComponent):
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    id = 'breadcrumbs'
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    # register msg not generated since no entity implements IPrevNext in cubicweb itself
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    title = _('contentnavigation_breadcrumbs')
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    help = _('contentnavigation_breadcrumbs_description')
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    __select__ = (one_line_rset() & match_context_prop() & implements(IBreadCrumbs))
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    context = 'navtop'
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    order = 5
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    visible = False
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    separator = u'&nbsp;&gt;&nbsp;'
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    def call(self, view=None, first_separator=True):
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        entity = self.entity(0)
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        path = entity.breadcrumbs(view)
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        if path:
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            self.w(u'<span class="pathbar">')
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            if first_separator:
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                self.w(self.separator)
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            root = path.pop(0)
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            if isinstance(root, Entity):
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                self.w(u'<a href="%s">%s</a>' % (self.req.build_url(root.id),
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                                                 root.dc_type('plural')))
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                self.w(self.separator)
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            self.wpath_part(root, entity, not path)
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            for i, parent in enumerate(path):
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                self.w(self.separator)
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                self.w(u"\n")
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                self.wpath_part(parent, entity, i == len(path) - 1)
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            self.w(u'</span>')
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    def wpath_part(self, part, contextentity, last=False):
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        if isinstance(part, Entity):
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            if last and part.eid == contextentity.eid:
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                self.w(bc_title(part))
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            else:
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                part.view('breadcrumbs', w=self.w)
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        elif isinstance(part, tuple):
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            url, title = part
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            textsize = self.req.property_value('navigation.short-line-size')
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            self.w(u'<a href="%s">%s</a>' % (
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                html_escape(url), html_escape(cut(title, textsize))))
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        else:
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            textsize = self.req.property_value('navigation.short-line-size')
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            self.w(cut(unicode(part), textsize))
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class BreadCrumbComponent(BreadCrumbEntityVComponent):
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    __registry__ = 'components'
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    __select__ = (one_line_rset() & implements(IBreadCrumbs))
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    visible = True
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class BreadCrumbView(EntityView):
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    id = 'breadcrumbs'
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    def cell_call(self, row, col):
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        entity = self.entity(row, col)
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        desc = html_escape(cut(entity.dc_description(), 50))
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        self.w(u'<a href="%s" title="%s">%s</a>' % (
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            html_escape(entity.absolute_url()), desc, bc_title(entity)))