web/views/formrenderers.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Tue, 23 Feb 2010 17:32:31 +0100
branchstable
changeset 4668 9f82f81bf13d
parent 4625 d8c3a50a8ee7
child 4743 026a89520184
permissions -rw-r--r--
[form] fix #719285, due to multiple calls to restore_previous_post, by proper refactorings * move __init__ code from FieldsForm to Form. Must behaviour here should actually be in the Form base class * avoid buggy duplicated call to restore_previous_post * move some code that was in the form renderer to the form'__init__ method (__redirectpath & __form_id hidden input handling)) * 'formvid' should now be specified on form selection, not on form rendering
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"""form renderers, responsible to layout a form to html
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:organization: Logilab
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:copyright: 2009-2010 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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from warnings import warn
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from logilab.common import dictattr
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from logilab.mtconverter import xml_escape
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from simplejson import dumps
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from cubicweb import tags
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from cubicweb.appobject import AppObject
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from cubicweb.selectors import implements, yes
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from cubicweb.web import eid_param, formwidgets as fwdgs
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def checkbox(name, value, attrs='', checked=None):
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    if checked is None:
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        checked = value
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    checked = checked and 'checked="checked"' or ''
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    return u'<input type="checkbox" name="%s" value="%s" %s %s />' % (
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        name, value, checked, attrs)
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def field_label(form, field):
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    # XXX with 3.6 we can now properly rely on 'if field.role is not None' and
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    # stop having a tuple for label
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    if isinstance(field.label, tuple): # i.e. needs contextual translation
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        return form._cw.pgettext(*field.label)
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    return form._cw._(field.label)
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class FormRenderer(AppObject):
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    """basic renderer displaying fields in a two columns table label | value
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    +--------------+--------------+
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    | field1 label | field1 input |
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    +--------------+--------------+
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    | field1 label | field2 input |
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    +--------------+--------------+
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    +---------+
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    | buttons |
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    +---------+
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    """
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    __registry__ = 'formrenderers'
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    __regid__ = 'default'
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    _options = ('display_label', 'display_help',
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                'display_progress_div', 'table_class', 'button_bar_class',
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                # add entity since it may be given to select the renderer
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                'entity')
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    display_label = True
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    display_help = True
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    display_progress_div = True
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    table_class = u'attributeForm'
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    button_bar_class = u'formButtonBar'
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    def __init__(self, req=None, rset=None, row=None, col=None, **kwargs):
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        super(FormRenderer, self).__init__(req, rset=rset, row=row, col=col)
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        if self._set_options(kwargs):
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            raise ValueError('unconsumed arguments %s' % kwargs)
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    def _set_options(self, kwargs):
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        for key in self._options:
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            try:
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                setattr(self, key, kwargs.pop(key))
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            except KeyError:
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                continue
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        return kwargs
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    # renderer interface ######################################################
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    def render(self, form, values):
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        self._set_options(values)
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        form.add_media()
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        data = []
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        w = data.append
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        w(self.open_form(form, values))
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        if self.display_progress_div:
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            w(u'<div id="progress">%s</div>' % self._cw._('validating...'))
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        w(u'<fieldset>')
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        self.render_fields(w, form, values)
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        self.render_buttons(w, form)
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        w(u'</fieldset>')
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        w(self.close_form(form, values))
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        errormsg = self.error_message(form)
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        if errormsg:
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            data.insert(0, errormsg)
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        return '\n'.join(data)
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    def render_label(self, form, field):
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        if field.label is None:
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            return u''
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        label = field_label(form, field)
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        attrs = {'for': field.dom_id(form)}
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        if field.required:
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            attrs['class'] = 'required'
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        return tags.label(label, **attrs)
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    def render_help(self, form, field):
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        help = []
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        descr = field.help
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        if callable(descr):
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            descr = descr(form)
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        if descr:
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            help.append('<div class="helper">%s</div>' % self._cw._(descr))
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        example = field.example_format(self._cw)
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        if example:
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            help.append('<div class="helper">(%s: %s)</div>'
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                        % (self._cw._('sample format'), example))
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        return u'&#160;'.join(help)
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    # specific methods (mostly to ease overriding) #############################
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    def error_message(self, form):
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        """return formatted error message
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        This method should be called once inlined field errors has been consumed
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        """
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        req = self._cw
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        errex = form.form_valerror
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        # get extra errors
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        if errex is not None:
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            errormsg = req._('please correct the following errors:')
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            errors = form.remaining_errors()
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            if errors:
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                if len(errors) > 1:
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                    templstr = '<li>%s</li>\n'
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                else:
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                    templstr = '&#160;%s\n'
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                for field, err in errors:
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                    if field is None:
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                        errormsg += templstr % err
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                    else:
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                        errormsg += templstr % '%s: %s' % (req._(field), err)
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                if len(errors) > 1:
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                    errormsg = '<ul>%s</ul>' % errormsg
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            return u'<div class="errorMessage">%s</div>' % errormsg
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        return u''
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    def open_form(self, form, values):
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        if form.needs_multipart:
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            enctype = 'multipart/form-data'
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        else:
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            enctype = 'application/x-www-form-urlencoded'
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        if form.action is None:
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            action = self._cw.build_url('edit')
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        else:
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            action = form.action
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        tag = ('<form action="%s" method="post" enctype="%s"' % (
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            xml_escape(action or '#'), enctype))
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        if form.domid:
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            tag += ' id="%s"' % form.domid
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        if form.onsubmit:
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            tag += ' onsubmit="%s"' % xml_escape(form.onsubmit % dictattr(form))
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        if form.cssstyle:
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            tag += ' style="%s"' % xml_escape(form.cssstyle)
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        if form.cssclass:
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            tag += ' class="%s"' % xml_escape(form.cssclass)
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        if form.cwtarget:
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            tag += ' cubicweb:target="%s"' % xml_escape(form.cwtarget)
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        return tag + '>'
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    def close_form(self, form, values):
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        """seem dump but important for consistency w/ close form, and necessary
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        for form renderers overriding open_form to use something else or more than
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        and <form>
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        """
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        return '</form>'
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    def render_fields(self, w, form, values):
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        fields = self._render_hidden_fields(w, form)
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        if fields:
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            self._render_fields(fields, w, form)
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        self.render_child_forms(w, form, values)
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    def render_child_forms(self, w, form, values):
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        # render
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        for childform in getattr(form, 'forms', []):
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            self.render_fields(w, childform, values)
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    def _render_hidden_fields(self, w, form):
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        fields = form.fields[:]
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        for field in form.fields:
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            if not field.is_visible():
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                w(field.render(form, self))
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                fields.remove(field)
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        return fields
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    def _render_fields(self, fields, w, form):
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        byfieldset = {}
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        for field in fields:
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            byfieldset.setdefault(field.fieldset, []).append(field)
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        if form.fieldsets_in_order:
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            fieldsets = form.fieldsets_in_order
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        else:
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            fieldsets = byfieldset.keys()
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        for fieldset in fieldsets:
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            try:
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                fields = byfieldset.pop(fieldset)
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            except KeyError:
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                self.warning('no such fieldset: %s (%s)', fieldset, form)
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                continue
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            w(u'<fieldset class="%s">' % (fieldset or u'default'))
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            if fieldset:
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                w(u'<legend>%s</legend>' % self._cw._(fieldset))
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            w(u'<table class="%s">' % self.table_class)
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            for field in fields:
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                w(u'<tr class="%s_%s_row">' % (field.name, field.role))
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                if self.display_label and field.label is not None:
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                    w(u'<th class="labelCol">%s</th>' % self.render_label(form, field))
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                w('<td')
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                if field.label is None:
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                    w(' colspan="2"')
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                error = form.field_error(field)
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                if error:
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                    w(u' class="error"')
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   224
                w(u'>')
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                w(field.render(form, self))
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   226
                if self.display_help:
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                    w(self.render_help(form, field))
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                w(u'</td></tr>')
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            w(u'</table></fieldset>')
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        if byfieldset:
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            self.warning('unused fieldsets: %s', ', '.join(byfieldset))
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    def render_buttons(self, w, form):
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   234
        if not form.form_buttons:
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   235
            return
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        w(u'<table class="%s">\n<tr>\n' % self.button_bar_class)
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        for button in form.form_buttons:
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   238
            w(u'<td>%s</td>\n' % button.render(form))
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        w(u'</tr></table>')
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   240
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    def render_error(self, w, err):
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        """return validation error for widget's field, if any"""
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        w(u'<span class="error">%s</span>' % err)
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class BaseFormRenderer(FormRenderer):
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    """use form_renderer_id = 'base' if you want base FormRenderer layout even
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    when selected for an entity
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    """
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    __regid__ = 'base'
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class HTableFormRenderer(FormRenderer):
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    """display fields horizontally in a table
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    +--------------+--------------+---------+
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    | field1 label | field2 label |         |
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    +--------------+--------------+---------+
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    | field1 input | field2 input | buttons
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    +--------------+--------------+---------+
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    """
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    __regid__ = 'htable'
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    display_help = False
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    def _render_fields(self, fields, w, form):
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        w(u'<table border="0" class="htableForm">')
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        w(u'<tr>')
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        for field in fields:
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            if self.display_label:
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                w(u'<th class="labelCol">%s</th>' % self.render_label(form, field))
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            if self.display_help:
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                w(self.render_help(form, field))
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        # empty slot for buttons
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        w(u'<th class="labelCol">&#160;</th>')
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        w(u'</tr>')
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        w(u'<tr>')
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        for field in fields:
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            error = form.field_error(field)
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            if error:
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                w(u'<td class="error">')
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                self.render_error(w, error)
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            else:
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                w(u'<td>')
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            w(field.render(form, self))
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            w(u'</td>')
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        w(u'<td>')
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        for button in form.form_buttons:
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            w(button.render(form))
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        w(u'</td>')
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        w(u'</tr>')
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        w(u'</table>')
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    def render_buttons(self, w, form):
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        pass
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class EntityCompositeFormRenderer(FormRenderer):
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    """specific renderer for multiple entities edition form (muledit)"""
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    __regid__ = 'composite'
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    _main_display_fields = None
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    def render_fields(self, w, form, values):
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        if form.parent_form is None:
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            w(u'<table class="listing">')
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            subfields = [field for field in form.forms[0].fields
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                         if field.is_visible()]
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            if subfields:
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                # main form, display table headers
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                w(u'<tr class="header">')
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                w(u'<th align="left">%s</th>' %
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                  tags.input(type='checkbox',
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                             title=self._cw._('toggle check boxes'),
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                             onclick="setCheckboxesState('eid', this.checked)"))
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                for field in subfields:
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                    w(u'<th>%s</th>' % field_label(form, field))
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                w(u'</tr>')
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        super(EntityCompositeFormRenderer, self).render_fields(w, form, values)
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        if form.parent_form is None:
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            w(u'</table>')
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            if self._main_display_fields:
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                super(EntityCompositeFormRenderer, self)._render_fields(
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                    self._main_display_fields, w, form)
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    def _render_fields(self, fields, w, form):
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        if form.parent_form is not None:
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            entity = form.edited_entity
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            values = form.form_previous_values
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            qeid = eid_param('eid', entity.eid)
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            cbsetstate = "setCheckboxesState2('eid', %s, 'checked')" % \
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                         xml_escape(dumps(entity.eid))
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            w(u'<tr class="%s">' % (entity.cw_row % 2 and u'even' or u'odd'))
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            # XXX turn this into a widget used on the eid field
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            w(u'<td>%s</td>' % checkbox('eid', entity.eid,
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                                        checked=qeid in values))
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            for field in fields:
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                error = form.field_error(field)
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                if error:
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                    w(u'<td class="error">')
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                    self.render_error(w, error)
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                else:
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                    w(u'<td>')
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                if isinstance(field.widget, (fwdgs.Select, fwdgs.CheckBox,
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                                             fwdgs.Radio)):
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                    field.widget.attrs['onchange'] = cbsetstate
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                elif isinstance(field.widget, fwdgs.Input):
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                    field.widget.attrs['onkeypress'] = cbsetstate
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                # XXX else
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                w(u'<div>%s</div>' % field.render(form, self))
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                w(u'</td>\n')
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            w(u'</tr>')
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        else:
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            self._main_display_fields = fields
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class EntityFormRenderer(BaseFormRenderer):
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    """specific renderer for entity edition form (edition)"""
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    __regid__ = 'default'
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diff changeset
   361
    # needs some additional points in some case (XXX explain cases)
4075
e710f4052bd6 use implements instead of entity_implements
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4073
diff changeset
   362
    __select__ = implements('Any') & yes()
1995
ec95eaa2b711 turn renderers into appobjects
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   363
4293
0c4bdb3d93fd delete remaining stuff w/ handling of the generic relations
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4278
diff changeset
   364
    _options = FormRenderer._options + ('main_form_title',)
3592
4c08780e54ed [i18n] msgid tweaks
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3572
diff changeset
   365
    main_form_title = _('main informations')
1436
97774eb6443b delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1434
diff changeset
   366
1181
620ec8e6ae19 cleanup, various fix to get something working
sylvain.thenault@logilab.fr
parents: 1147
diff changeset
   367
    def render(self, form, values):
620ec8e6ae19 cleanup, various fix to get something working
sylvain.thenault@logilab.fr
parents: 1147
diff changeset
   368
        rendered = super(EntityFormRenderer, self).render(form, values)
620ec8e6ae19 cleanup, various fix to get something working
sylvain.thenault@logilab.fr
parents: 1147
diff changeset
   369
        return rendered + u'</div>' # close extra div introducted by open_form
1436
97774eb6443b delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1434
diff changeset
   370
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   371
    def open_form(self, form, values):
3507
ff945c7013d9 [form] make EntityFormRenderer a little bit easier to override
Katia Saurfelt <katia.saurfelt@logilab.fr>
parents: 3360
diff changeset
   372
        attrs_fs_label = ''
ff945c7013d9 [form] make EntityFormRenderer a little bit easier to override
Katia Saurfelt <katia.saurfelt@logilab.fr>
parents: 3360
diff changeset
   373
        if self.main_form_title:
ff945c7013d9 [form] make EntityFormRenderer a little bit easier to override
Katia Saurfelt <katia.saurfelt@logilab.fr>
parents: 3360
diff changeset
   374
            attrs_fs_label += ('<div class="iformTitle"><span>%s</span></div>'
4073
03681ba6da0b cw 3.6 api update
Sandrine Ribeau <sandrine.ribeau@logilab.fr>
parents: 4023
diff changeset
   375
                               % self._cw._(self.main_form_title))
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   376
        attrs_fs_label += '<div class="formBody">'
1181
620ec8e6ae19 cleanup, various fix to get something working
sylvain.thenault@logilab.fr
parents: 1147
diff changeset
   377
        return attrs_fs_label + super(EntityFormRenderer, self).open_form(form, values)
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   378
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   379
    def render_buttons(self, w, form):
1304
8975c8e520a9 refactor button handling
sylvain.thenault@logilab.fr
parents: 1293
diff changeset
   380
        if len(form.form_buttons) == 3:
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   381
            w("""<table width="100%%">
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   382
  <tbody>
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   383
   <tr><td align="center">
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   384
     %s
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   385
   </td><td style="align: right; width: 50%%;">
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   386
     %s
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   387
     %s
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   388
   </td></tr>
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   389
  </tbody>
1304
8975c8e520a9 refactor button handling
sylvain.thenault@logilab.fr
parents: 1293
diff changeset
   390
 </table>""" % tuple(button.render(form) for button in form.form_buttons))
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   391
        else:
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   392
            super(EntityFormRenderer, self).render_buttons(w, form)
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   393
1436
97774eb6443b delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1434
diff changeset
   394
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   395
class EntityInlinedFormRenderer(EntityFormRenderer):
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   396
    """specific renderer for entity inlined edition form
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   397
    (inline-[creation|edition])
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   398
    """
3377
dd9d292b6a6d use __regid__ instead of id on appobject classes
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3369
diff changeset
   399
    __regid__ = 'inline'
1995
ec95eaa2b711 turn renderers into appobjects
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   400
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   401
    def render(self, form, values):
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   402
        form.add_media()
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   403
        data = []
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   404
        w = data.append
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   405
        try:
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   406
            w(u'<div id="div-%(divid)s" onclick="%(divonclick)s">' % values)
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   407
        except KeyError:
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   408
            w(u'<div id="div-%(divid)s">' % values)
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   409
        else:
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   410
            w(u'<div id="notice-%s" class="notice">%s</div>' % (
3451
6b46d73823f5 [api] work in progress, use __regid__, cw_*, etc.
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 3398
diff changeset
   411
                values['divid'], self._cw._('click on the box to cancel the deletion')))
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   412
        w(u'<div class="iformBody">')
3327
44efba78afac fix/enhance i18n context usage for inlined forms
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3275
diff changeset
   413
        eschema = form.edited_entity.e_schema
4380
5613d7c06339 simplify messages used for inlined forms
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4378
diff changeset
   414
        values['removemsg'] = self._cw._('remove-inlined-entity-form')
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   415
        w(u'<div class="iformTitle"><span>%(title)s</span> '
2247
9dbbe6a4c9b0 use a counter of displayed inlined forms
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2198
diff changeset
   416
          '#<span class="icounter">%(counter)s</span> '
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   417
          '[<a href="javascript: %(removejs)s;noop();">%(removemsg)s</a>]</div>'
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   418
          % values)
1964
b60719223965 need to cleanup values if we don't want them to be interpreted by fields (title is a common field name for instance)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1946
diff changeset
   419
        # cleanup values
b60719223965 need to cleanup values if we don't want them to be interpreted by fields (title is a common field name for instance)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1946
diff changeset
   420
        for key in ('title', 'removejs', 'removemsg'):
b60719223965 need to cleanup values if we don't want them to be interpreted by fields (title is a common field name for instance)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1946
diff changeset
   421
            values.pop(key)
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   422
        self.render_fields(w, form, values)
1293
aae1516b6426 missing closing div
sylvain.thenault@logilab.fr
parents: 1292
diff changeset
   423
        w(u'</div></div>')
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   424
        return '\n'.join(data)
1436
97774eb6443b delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1434
diff changeset
   425
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   426
    def render_fields(self, w, form, values):
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   427
        w(u'<fieldset id="fs-%(divid)s">' % values)
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   428
        fields = self._render_hidden_fields(w, form)
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   429
        w(u'</fieldset>')
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   430
        w(u'<fieldset class="subentity">')
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   431
        if fields:
1403
425892e14e67 _render_fields don't need values argument
sylvain.thenault@logilab.fr
parents: 1401
diff changeset
   432
            self._render_fields(fields, w, form)
1147
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   433
        self.render_child_forms(w, form, values)
402e8a8b1d6a more form works
sylvain.thenault@logilab.fr
parents:
diff changeset
   434
        w(u'</fieldset>')
1436
97774eb6443b delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1434
diff changeset
   435