web/views/ibreadcrumbs.py
author Alexandre Fayolle <alexandre.fayolle@logilab.fr>
Wed, 07 Apr 2010 11:56:30 +0200
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"""navigation components definition for CubicWeb web client
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:organization: Logilab
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:copyright: 2001-2010 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 xml_escape
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from cubicweb.interfaces import IBreadCrumbs
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from cubicweb.selectors import (one_line_rset, implements, one_etype_rset,
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                                multi_lines_rset, any_rset)
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from cubicweb.view import EntityView, Component
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# don't use AnyEntity since this may cause bug with isinstance() due to reloading
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from cubicweb.entity import Entity
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from cubicweb import tags, uilib
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class BreadCrumbEntityVComponent(Component):
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    __regid__ = 'breadcrumbs'
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    __select__ = one_line_rset() & implements(IBreadCrumbs, accept_none=False)
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    cw_property_defs = {
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        _('visible'):  dict(type='Boolean', default=True,
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                            help=_('display the component or not')),
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        }
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    title = _('contentnavigation_breadcrumbs')
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    help = _('contentnavigation_breadcrumbs_description')
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    separator = u'&#160;&gt;&#160;'
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    link_template = u'<a href="%s">%s</a>'
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    def call(self, view=None, first_separator=True):
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        entity = self.cw_rset.get_entity(0, 0)
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        path = entity.breadcrumbs(view)
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        if path:
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            self.open_breadcrumbs()
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            if first_separator:
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                self.w(self.separator)
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            self.render_breadcrumbs(entity, path)
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            self.close_breadcrumbs()
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    def open_breadcrumbs(self):
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        self.w(u'<span id="breadcrumbs" class="pathbar">')
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    def close_breadcrumbs(self):
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        self.w(u'</span>')
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    def render_breadcrumbs(self, contextentity, path):
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        root = path.pop(0)
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        if isinstance(root, Entity):
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            self.w(self.link_template % (self._cw.build_url(root.__regid__),
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                                         root.dc_type('plural')))
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            self.w(self.separator)
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        self.wpath_part(root, contextentity, 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, contextentity, i == len(path) - 1)
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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(xml_escape(part.view('breadcrumbtext')))
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            else:
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                self.w(part.view('breadcrumbs'))
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        elif isinstance(part, tuple):
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            url, title = part
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            textsize = self._cw.property_value('navigation.short-line-size')
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            self.w(self.link_template % (
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                xml_escape(url), xml_escape(uilib.cut(title, textsize))))
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        else:
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            textsize = self._cw.property_value('navigation.short-line-size')
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            self.w(uilib.cut(unicode(part), textsize))
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class BreadCrumbETypeVComponent(BreadCrumbEntityVComponent):
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    __select__ = multi_lines_rset() & one_etype_rset() & \
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                 implements(IBreadCrumbs, accept_none=False)
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    def render_breadcrumbs(self, contextentity, path):
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        # XXX hack: only display etype name or first non entity path part
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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._cw.build_url(root.__regid__),
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                                             root.dc_type('plural')))
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        else:
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            self.wpath_part(root, contextentity, not path)
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class BreadCrumbAnyRSetVComponent(BreadCrumbEntityVComponent):
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    __select__ = any_rset()
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    def call(self, view=None, first_separator=True):
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        self.w(u'<span id="breadcrumbs" class="pathbar">')
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    98
        if first_separator:
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    99
            self.w(self.separator)
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   100
        self.w(self._cw._('search'))
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   101
        self.w(u'</span>')
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   102
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   103
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   104
class BreadCrumbView(EntityView):
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   105
    __regid__ = 'breadcrumbs'
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   106
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   107
    def cell_call(self, row, col, **kwargs):
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        entity = self.cw_rset.get_entity(row, col)
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   109
        desc = xml_escape(uilib.cut(entity.dc_description(), 50))
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   110
        # XXX remember camember : tags.a autoescapes !
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   111
        self.w(tags.a(entity.view('breadcrumbtext'),
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   112
                      href=entity.absolute_url(), title=desc))
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   113
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   114
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   115
class BreadCrumbTextView(EntityView):
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    __regid__ = 'breadcrumbtext'
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   117
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   118
    def cell_call(self, row, col, **kwargs):
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        entity = self.cw_rset.get_entity(row, col)
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   120
        textsize = self._cw.property_value('navigation.short-line-size')
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   121
        self.w(uilib.cut(entity.dc_title(), textsize))