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"""Tornado handlers for the tree view."""
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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from tornado import web
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from ..base.handlers import IPythonHandler, notebook_path_regex, path_regex
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from ..utils import url_path_join, url_escape
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class TreeHandler(IPythonHandler):
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"""Render the tree view, listing notebooks, clusters, etc."""
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def generate_breadcrumbs(self, path):
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breadcrumbs = [(url_escape(url_path_join(self.base_url, 'tree')), '')]
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comps = path.split('/')
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ncomps = len(comps)
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for i in range(ncomps):
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if comps[i]:
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link = url_escape(url_path_join(self.base_url, 'tree', *comps[0:i+1]))
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breadcrumbs.append((link, comps[i]))
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return breadcrumbs
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def generate_page_title(self, path):
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comps = path.split('/')
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if len(comps) > 3:
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for i in range(len(comps)-2):
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comps.pop(0)
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page_title = url_path_join(*comps)
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if page_title:
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return page_title+'/'
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else:
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return 'Home'
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@web.authenticated
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def get(self, path='', name=None):
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path = path.strip('/')
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cm = self.contents_manager
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if name is not None:
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# is a notebook, redirect to notebook handler
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url = url_escape(url_path_join(
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self.base_url, 'notebooks', path, name
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))
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self.log.debug("Redirecting %s to %s", self.request.path, url)
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self.redirect(url)
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else:
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if not cm.path_exists(path=path):
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# Directory is hidden or does not exist.
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raise web.HTTPError(404)
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elif cm.is_hidden(path):
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self.log.info("Refusing to serve hidden directory, via 404 Error")
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raise web.HTTPError(404)
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breadcrumbs = self.generate_breadcrumbs(path)
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page_title = self.generate_page_title(path)
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self.write(self.render_template('tree.html',
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page_title=page_title,
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notebook_path=path,
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breadcrumbs=breadcrumbs,
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terminals_available=self.settings['terminals_available'],
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))
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#-----------------------------------------------------------------------------
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# URL to handler mappings
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#-----------------------------------------------------------------------------
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default_handlers = [
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(r"/tree%s" % notebook_path_regex, TreeHandler),
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(r"/tree%s" % path_regex, TreeHandler),
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(r"/tree", TreeHandler),
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]
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