101 lines
4.7 KiB
Python
101 lines
4.7 KiB
Python
# ------------------------------------------------------------------------------
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# This file is part of Appy, a framework for building applications in the Python
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# language. Copyright (C) 2007 Gaetan Delannay
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# Appy is free software; you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 3 of the License, or (at your option) any later
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# version.
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# Appy is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License along with
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# Appy. If not, see <http://www.gnu.org/licenses/>.
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# ------------------------------------------------------------------------------
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from appy.fields import Field
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from appy.px import Px
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# ------------------------------------------------------------------------------
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class Computed(Field):
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WRONG_METHOD = 'Wrong value "%s". Param "method" must contain a method ' \
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'or a PX.'
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# Ajax-called view content of a non sync Computed field.
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pxViewContent = Px('''
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<x var="value=zobj.getFieldValue(name); sync=True">:field.pxView</x>''')
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pxView = pxCell = pxEdit = Px('''<x>
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<x if="sync">
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<x if="field.plainText">:value</x><x if="not field.plainText">::value</x>
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</x>
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<div if="not sync" var2="ajaxHookId=zobj.UID() + name" id="ajaxHookId">
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<script type="text/javascript">:'askComputedField(%s, %s, %s)' % \
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(q(ajaxHookId), q(zobj.absolute_url()), q(name))">
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</script>
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</div>
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</x>''')
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pxSearch = Px('''<x>
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<label lfor=":name">:field.labelId</label><br/>
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<input type="text" name=":'%s*string' % name" maxlength=":field.maxChars"
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size=":field.width" value=":field.sdefault"/>
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</x>''')
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def __init__(self, validator=None, multiplicity=(0,1), default=None,
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show=('view', 'result'), page='main', group=None,
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layouts=None, move=0, indexed=False, searchable=False,
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specificReadPermission=False, specificWritePermission=False,
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width=None, height=None, maxChars=None, colspan=1, method=None,
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plainText=False, master=None, masterValue=None, focus=False,
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historized=False, sync=True, mapping=None, label=None,
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sdefault='', scolspan=1, swidth=None, sheight=None,
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context=None):
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# The Python method used for computing the field value, or a PX.
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self.method = method
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if isinstance(self.method, basestring):
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# A legacy macro identifier. Raise an exception
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raise Exception(self.WRONG_METHOD % self.method)
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# Does field computation produce plain text or XHTML?
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self.plainText = plainText
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if isinstance(method, Px):
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# When field computation is done with a PX, the result is XHTML.
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self.plainText = False
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# If method is a PX, its context can be given in p_context.
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self.context = context
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Field.__init__(self, None, multiplicity, default, show, page, group,
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layouts, move, indexed, searchable,
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specificReadPermission, specificWritePermission, width,
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height, None, colspan, master, masterValue, focus,
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historized, sync, mapping, label, sdefault, scolspan,
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swidth, sheight)
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self.validable = False
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def getValue(self, obj):
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'''Computes the value instead of getting it in the database.'''
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if not self.method: return
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if isinstance(self.method, Px):
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obj = obj.appy()
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tool = obj.tool
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req = obj.request
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# Get the context of the currently executed PX if present
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try:
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ctx = req.pxContext
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except AttributeError:
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# Create some standard context
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ctx = {'obj': obj, 'zobj': obj.o, 'field': self,
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'req': req, 'tool': tool, 'ztool': tool.o,
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'_': tool.translate, 'url': tool.o.getIncludeUrl}
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if self.context: ctx.update(self.context)
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return self.method(ctx)
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else:
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# self.method is a method that will return the field value
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return self.callMethod(obj, self.method, cache=False)
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def getFormattedValue(self, obj, value, showChanges=False):
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if not isinstance(value, basestring): return str(value)
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return value
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# ------------------------------------------------------------------------------
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