"""navigation components definition for CubicWeb web client
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
_ = unicode
from rql.nodes import VariableRef, Constant
from logilab.mtconverter import xml_escape
from logilab.common.deprecation import deprecated
from cubicweb.interfaces import IPrevNext
from cubicweb.selectors import (paginated_rset, sorted_rset,
primary_view, match_context_prop,
one_line_rset, implements)
from cubicweb.common.uilib import cut
from cubicweb.web.component import EntityVComponent, NavigationComponent
class PageNavigation(NavigationComponent):
def call(self):
"""displays a resultset by page"""
w = self.w
req = self.req
rset = self.rset
page_size = self.page_size
start = 0
blocklist = []
params = dict(req.form)
self.clean_params(params)
basepath = req.relative_path(includeparams=False)
while start < rset.rowcount:
stop = min(start + page_size - 1, rset.rowcount - 1)
blocklist.append(self.page_link(basepath, params, start, stop,
self.index_display(start, stop)))
start = stop + 1
w(u'<div class="pagination">')
w(u'%s ' % self.previous_link(basepath, params))
w(u'[ %s ]' % u' | '.join(blocklist))
w(u' %s' % self.next_link(basepath, params))
w(u'</div>')
def index_display(self, start, stop):
return u'%s - %s' % (start+1, stop+1)
class SortedNavigation(NavigationComponent):
"""sorted navigation apply if navigation is needed (according to page size)
and if the result set is sorted
"""
__select__ = paginated_rset() & sorted_rset()
# number of considered chars to build page links
nb_chars = 5
def display_func(self, rset, col, attrname):
req = self.req
if attrname is not None:
def index_display(row):
entity = rset.get_entity(row, col)
return entity.printable_value(attrname, format='text/plain')
elif self.schema.eschema(rset.description[0][col]).is_final():
def index_display(row):
return unicode(rset[row][col])
else:
def index_display(row):
return rset.get_entity(row, col).view('text')
return index_display
def call(self):
"""displays links to navigate accross pages of a result set
Displayed result is done according to a variable on which the sort
is done, and looks like:
[ana - cro] | [cro - ghe] | ... | [tim - zou]
"""
w = self.w
rset = self.rset
page_size = self.page_size
rschema = self.schema.rschema
# attrname = the name of attribute according to which the sort
# is done if any
for sorterm in rset.syntax_tree().children[0].orderby:
if isinstance(sorterm.term, Constant):
col = sorterm.term.value - 1
index_display = self.display_func(rset, col, None)
break
var = sorterm.term.get_nodes(VariableRef)[0].variable
col = None
for ref in var.references():
rel = ref.relation()
if rel is None:
continue
attrname = rel.r_type
if attrname == 'is':
continue
if not rschema(attrname).is_final():
col = var.selected_index()
attrname = None
if col is None:
# final relation or not selected non final relation
if var is rel.children[0]:
relvar = rel.children[1].children[0].get_nodes(VariableRef)[0]
else:
relvar = rel.children[0].variable
col = relvar.selected_index()
if col is not None:
break
else:
# no relation but maybe usable anyway if selected
col = var.selected_index()
attrname = None
if col is not None:
index_display = self.display_func(rset, col, attrname)
break
else:
# nothing usable found, use the first column
index_display = self.display_func(rset, 0, None)
blocklist = []
params = dict(self.req.form)
self.clean_params(params)
start = 0
basepath = self.req.relative_path(includeparams=False)
while start < rset.rowcount:
stop = min(start + page_size - 1, rset.rowcount - 1)
cell = self.format_link_content(index_display(start), index_display(stop))
blocklist.append(self.page_link(basepath, params, start, stop, cell))
start = stop + 1
self.write_links(basepath, params, blocklist)
def format_link_content(self, startstr, stopstr):
text = u'%s - %s' % (startstr.lower()[:self.nb_chars],
stopstr.lower()[:self.nb_chars])
return xml_escape(text)
def write_links(self, basepath, params, blocklist):
self.w(u'<div class="pagination">')
self.w(u'%s ' % self.previous_link(basepath, params))
self.w(u'[ %s ]' % u' | '.join(blocklist))
self.w(u' %s' % self.next_link(basepath, params))
self.w(u'</div>')
def limit_rset_using_paged_nav(self, req, rset, w, forcedisplay=False,
show_all_option=True, page_size=None):
if not (forcedisplay or req.form.get('__force_display') is not None):
nav = self.vreg['components'].select_or_none('navigation', req,
rset=rset, page_size=page_size)
if nav:
# get boundaries before component rendering
start, stop = nav.page_boundaries()
nav.render(w=w)
params = dict(req.form)
nav.clean_params(params)
# make a link to see them all
if show_all_option:
url = xml_escape(self.build_url(__force_display=1, **params))
w(u'<span><a href="%s">%s</a></span>\n'
% (url, req._('show %s results') % len(rset)))
rset.limit(offset=start, limit=stop-start, inplace=True)
# monkey patch base View class to add a .pagination(req, rset, w, forcedisplay)
# method to be called on view's result set and printing pages index in the view
from cubicweb.view import View
View.pagination = deprecated('.pagination is deprecated, use paginate')(limit_rset_using_paged_nav)
def paginate(view, show_all_option=True, w=None, page_size=None):
limit_rset_using_paged_nav(view, view.req, view.rset, w or view.w,
not view.need_navigation, show_all_option,
page_size=page_size)
View.paginate = paginate
class NextPrevNavigationComponent(EntityVComponent):
__regid__ = 'prevnext'
# register msg not generated since no entity implements IPrevNext in cubicweb
# itself
title = _('contentnavigation_prevnext')
help = _('contentnavigation_prevnext_description')
__select__ = (one_line_rset() & primary_view()
& match_context_prop() & implements(IPrevNext))
context = 'navbottom'
order = 10
def call(self, view=None):
entity = self.rset.get_entity(0,0)
previous = entity.previous_entity()
next = entity.next_entity()
if previous or next:
textsize = self.req.property_value('navigation.short-line-size')
self.w(u'<div class="prevnext">')
if previous:
self.w(u'<div class="previousEntity left">')
self.w(self.previous_link(previous, textsize))
self.w(u'</div>')
self.req.html_headers.add_raw('<link rel="prev" href="%s" />'
% xml_escape(previous.absolute_url()))
if next:
self.w(u'<div class="nextEntity right">')
self.w(self.next_link(next, textsize))
self.w(u'</div>')
self.req.html_headers.add_raw('<link rel="next" href="%s" />'
% xml_escape(next.absolute_url()))
self.w(u'</div>')
self.w(u'<div class="clear"></div>')
def previous_link(self, previous, textsize):
return u'<a href="%s" title="%s"><< %s</a>' % (
xml_escape(previous.absolute_url()),
self.req._('i18nprevnext_previous'),
xml_escape(cut(previous.dc_title(), textsize)))
def next_link(self, next, textsize):
return u'<a href="%s" title="%s">%s >></a>' % (
xml_escape(next.absolute_url()),
self.req._('i18nprevnext_next'),
xml_escape(cut(next.dc_title(), textsize)))