[web/view/treeview] add a 'selected' class on <li> if the entity's url is the currently displayed url An alternative would be to refactor the corresponding view so that controlling css classes wouldn't require overriding a 5O-lines method. Notice by default there is no associated class in the CSS so there is no rendering difference unless one explicitly add rule in his CSS file.

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try:

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    rtype, = __args__

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except ValueError:

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    print 'USAGE: cubicweb-ctl shell <instance> detect_cycle.py -- <relation type>'

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    print

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graph = {}

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for fromeid, toeid in rql('Any X,Y WHERE X %s Y' % rtype):

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    graph.setdefault(fromeid, []).append(toeid)

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from logilab.common.graph import get_cycles

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for cycle in get_cycles(graph):

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    print 'cycle', '->'.join(str(n) for n in cycle)