web/views/timetable.py
author Aurelien Campeas <aurelien.campeas@logilab.fr>
Wed, 21 Oct 2009 11:34:11 +0200
branchstable
changeset 3767 03924de0014d
parent 2996 866a2c135c33
child 3377 dd9d292b6a6d
child 3829 9674d62a54f9
permissions -rw-r--r--
reledit: stuff the value into its own div and properly hide it when necessary (but dont lump it with the landingzone div for it switches the form on when one clicks on a value to traverse it)

"""html calendar views

: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
"""

from logilab.mtconverter import xml_escape

from cubicweb.interfaces import ITimetableViews
from cubicweb.selectors import implements
from cubicweb.utils import date_range
from cubicweb.view import AnyRsetView


class _TaskEntry(object):
    def __init__(self, task, color, column):
        self.task = task
        self.color = color
        self.column = column
        self.lines = 1

MIN_COLS = 3  # minimum number of task columns for a single user

class TimeTableView(AnyRsetView):
    id = 'timetable'
    title = _('timetable')
    __select__ = implements(ITimetableViews)
    need_navigation = False

    def call(self, title=None):
        """Dumps a timetable from a resultset composed of a note (anything
        with start/stop) and a user (anything)"""
        self.req.add_css('cubicweb.timetable.css')
        dates = {}
        users = []
        users_max = {}

        # XXX: try refactoring with calendar.py:OneMonthCal
        for row in xrange(self.rset.rowcount):
            task = self.rset.get_entity(row, 0)
            if len(self.rset[row])>1:
                user = self.rset.get_entity(row, 1)
            else:
                user = u"*"
            the_dates = []
            if task.start and task.stop:
                if task.start.toordinal() == task.stop.toordinal():
                    the_dates.append(task.start)
                else:
                    the_dates += date_range( task.start, task.stop )
            elif task.start:
                the_dates.append(task.start)
            elif task.stop:
                the_dates.append(task.stop)
            for d in the_dates:
                d_users = dates.setdefault(d, {})
                u_tasks = d_users.setdefault(user, set())
                u_tasks.add( task )
                task_max = users_max.setdefault(user, 0)
                if len(u_tasks)>task_max:
                    users_max[user] = len(u_tasks)
            if user not in users:
                # keep original ordering
                users.append(user)
        if not dates:
            return
        date_min = min(dates)
        date_max = max(dates)
        #users = list(sorted(users, key=lambda u:u.login))

        rows = []
        # colors here are class names defined in cubicweb.css
        colors = ["col%x" % i for i in xrange(12)]
        next_color_index = 0

        visited_tasks = {} # holds a description of a task for a user
        task_colors = {}   # remember a color assigned to a task
        for date in date_range(date_min, date_max):
            columns = [date]
            d_users = dates.get(date, {})
            for user in users:
                # every user has its column "splitted" in at least MIN_COLS
                # sub-columns (for overlapping tasks)
                user_columns = [None] * max(MIN_COLS, users_max[user])
                # every task that is "visited" for the first time
                # require a special treatment, so we put them in
                # 'postpone'
                postpone = []
                for task in d_users.get(user, []):
                    key = (task, user)
                    if key in visited_tasks:
                        task_descr = visited_tasks[ key ]
                        user_columns[task_descr.column] = task_descr, False
                        task_descr.lines += 1
                    else:
                        postpone.append(key)
                for key in postpone:
                    # to every 'new' task we must affect a color
                    # (which must be the same for every user concerned
                    # by the task)
                    task, user = key
                    for i, t in enumerate(user_columns):
                        if t is None:
                            if task in task_colors:
                                color = task_colors[task]
                            else:
                                color = colors[next_color_index]
                                next_color_index = (next_color_index+1)%len(colors)
                                task_colors[task] = color
                            task_descr = _TaskEntry(task, color, i)
                            user_columns[i] = task_descr, True
                            visited_tasks[key] = task_descr
                            break
                    else:
                        raise RuntimeError("is it possible we got it wrong?")

                columns.append( user_columns )
            rows.append( columns )

        widths = [ len(col) for col in rows[0][1:] ]
        self.w(u'<div class="section">')
        if title:
            self.w(u'<h4>%s</h4>\n' % title)
        self.w(u'<table class="listing timetable">')
        self.render_col_headers(users, widths)
        self.render_rows(rows)
        self.w(u'</table>')
        self.w(u'</div>\n')

    def render_col_headers(self, users, widths):
        """ render column headers """
        self.w(u'<tr class="header">\n')

        self.w(u'<th class="ttdate">&#160;</th>\n')
        columns = []
        for user, width in zip(users, widths):
            self.w(u'<th colspan="%s">' % max(MIN_COLS, width))
            if user != u"*":
                user.view('oneline', w=self.w)
            else:
                self.w(user)
            self.w(u'</th>')
        self.w(u'</tr>\n')
        return columns

    def render_rows(self, rows):
        """ render table content (row headers and central content) """
        odd = False
        previous_is_empty = False
        for row in rows:
            date = row[0]
            empty_line = True
            for group in row[1:]:
                for value in group:
                    if value:
                        empty_line = False
                        break
                else:
                    continue
                break
            if empty_line and previous_is_empty:
                continue
            previous_is_empty = False

            klass = "even"
            if date.weekday() in (5, 6) and not empty_line:
                klass = "odd"
            self.w(u'<tr class="%s">' % klass)
            odd = not odd

            if not empty_line:
                self.w(u'<th class="ttdate">%s</th>' % self.format_date(date) )
            else:
                self.w(u'<th>...</th>'  )
                previous_is_empty = True

            empty_klasses = [ "ttle", "ttme", "ttre" ]
            filled_klasses = [ "ttlf", "ttmf", "ttrf" ]
            kj = 0 # 0: left, 1: mid, 2: right
            for uid, group in enumerate(row[1:]):
                for i, value in enumerate(group):
                    if i == 0:
                        kj = 0
                    elif i == len(group):
                        kj = 2
                    else:
                        kj = 1
                    if value:
                        task_descr, first_row = value
                        if first_row:
                            url = xml_escape(task_descr.task.absolute_url(vid="edition"))
                            self.w(u'<td rowspan="%d" class="%s %s" onclick="document.location=\'%s\'">&#160;<div>' % (
                                task_descr.lines, task_descr.color, filled_klasses[kj], url))
                            task_descr.task.view('tooltip', w=self.w)
                            self.w(u'</div></td>')
                    else:
                        if empty_line:
                            self.w(u'<td class="ttempty">&#160;</td>')
                        else:
                            self.w(u'<td class="%s">&#160;</td>' % empty_klasses[kj] )
            self.w(u'</tr>\n')