b13f705cc4
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@3222 fd906abe-77d9-0310-91a1-e0d9ade77398
138 lines
4.5 KiB
Python
138 lines
4.5 KiB
Python
#
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# Copyright (c) 2009 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Field and field instance classes for grids.
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$Id$
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"""
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from zope import component
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from zope.component import adapts
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from zope.interface import implements
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from zope.app.pagetemplate import ViewPageTemplateFile
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from zope.cachedescriptors.property import Lazy
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import zope.schema
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from cybertools.composer.schema.factory import createField
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from cybertools.composer.schema.field import ListFieldInstance
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from cybertools.composer.schema.interfaces import IField, IFieldInstance
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from cybertools.composer.schema.interfaces import fieldTypes, undefined
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from cybertools.util.format import toStr, toUnicode
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from cybertools.util import json
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grid_macros = ViewPageTemplateFile('grid_macros.pt')
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class GridFieldInstance(ListFieldInstance):
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@Lazy
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def columnTypes(self):
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return [createField(t) for t in self.context.column_types]
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@Lazy
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def columnFieldInstances(self):
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result = []
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for f in self.columnTypes:
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instanceName = (f.instance_name or
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f.getFieldTypeInfo().instanceName)
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result.append(component.getAdapter(f, IFieldInstance,
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name=instanceName))
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return result
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def marshall(self, value):
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if isinstance(value, basestring):
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return value
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v = value or []
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for row in v:
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for fi in self.columnFieldInstances:
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vr = fi.marshall(row[fi.name])
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if isinstance(vr, basestring):
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row[fi.name] = vr.replace('\n', '\\n').replace('"', '\\"')
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empty = {}
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for fi in self.columnFieldInstances:
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default = fi.default
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if default is None:
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default = ''
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empty[fi.name] = str(default)
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for i in range(3):
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v.append(empty)
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return json.dumps(dict(items=v))
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def display(self, value):
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headers = [fi.context.title for fi in self.columnFieldInstances]
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rows = []
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for item in value or []:
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row = []
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for fi in self.columnFieldInstances:
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row.append(fi.display(item[fi.name]))
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rows.append(row)
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return dict(headers=headers, rows=rows)
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def unmarshall(self, value):
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value = toUnicode(value.strip())
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if not value:
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return []
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result = []
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rows = json.loads(value)['items']
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for row in rows:
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item = {}
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empty = True
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for fi in self.columnFieldInstances:
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value = fi.unmarshall(row[fi.name])
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item[fi.name] = value
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if fi.default is not None:
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if value != fi.default:
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empty = False
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elif value:
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empty = False
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if not empty:
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result.append(item)
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return result
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class RecordsFieldInstance(GridFieldInstance):
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def marshall(self, value):
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result = []
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for row in value or []:
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item = {}
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for fi in self.columnFieldInstances:
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item[fi.name] = fi.marshall(row[fi.name])
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result.append(item)
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return result
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def unmarshall(self, value):
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if not value:
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value = []
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result = []
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for row in value:
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item = {}
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empty = True
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for fi in self.columnFieldInstances:
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value = fi.unmarshall(row[fi.name].strip())
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item[fi.name] = value
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if fi.default is not None:
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if value and value != fi.default:
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empty = False
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elif value:
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empty = False
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if not empty:
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result.append(item)
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return result
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