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302
src/tools/xml_tools.py
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302
src/tools/xml_tools.py
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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"""
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SAT: a jabber client
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Copyright (C) 2009, 2010 Jérôme Poisson (goffi@goffi.org)
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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from logging import debug, info, error
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from xml.dom import minidom
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from wokkel import data_form
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import pdb
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"""This library help manage XML used in SàT (parameters, registration, etc) """
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def dataForm2xml(form):
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"""Take a data form (xep-0004, Wokkel's implementation) and convert it to a SàT xml"""
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form_ui = XMLUI("form", "vertical")
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if form.instructions:
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form_ui.addText('\n'.join(form.instructions), 'instructions')
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labels = filter(lambda field:field.label,form.fieldList)
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if labels:
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#if there is no label, we don't need to use pairs
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form_ui.changeLayout("pairs")
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for field in form.fieldList:
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if field.fieldType == 'fixed':
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__field_type = 'text'
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elif field.fieldType == 'text-single':
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__field_type = "string"
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elif field.fieldType == 'text-private':
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__field_type = "password"
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elif field.fieldType == 'list-single':
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__field_type = "list"
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else:
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error (u"FIXME FIXME FIXME: Type [%s] is not managed yet by SàT" % field.fieldType)
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__field_type = "string"
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if labels:
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if field.label:
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form_ui.addLabel(field.label)
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else:
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form_ui.addEmpty()
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elem = form_ui.addElement(__field_type, field.var, field.value, [option.value for option in field.options])
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return form_ui.toXml()
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def tupleList2dataForm(values):
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"""convert a list of tuples (name,value) to a wokkel submit data form"""
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form = data_form.Form('submit')
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for value in values:
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field = data_form.Field(var=value[0], value=value[1])
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form.addField(field)
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return form
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def paramsXml2xmlUI(xml):
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"""Convert the xml for parameter to a SàT XML User Interface"""
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params_doc = minidom.parseString(xml.encode('utf-8'))
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top = params_doc.documentElement
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if top.nodeName != 'params':
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error(_('INTERNAL ERROR: parameters xml not valid'))
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assert(False)
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param_ui = XMLUI("param", "tabs")
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for category in top.getElementsByTagName("category"):
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name = category.getAttribute('name')
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label = category.getAttribute('label')
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if not name:
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error(_('INTERNAL ERROR: params categories must have a name'))
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assert(False)
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param_ui.addCategory(name, 'pairs', label=label)
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for param in category.getElementsByTagName("param"):
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name = param.getAttribute('name')
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label = param.getAttribute('label')
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if not name:
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error(_('INTERNAL ERROR: params must have a name'))
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assert(False)
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type = param.getAttribute('type')
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value = param.getAttribute('value') or None
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callback_id = param.getAttribute('callback_id') or None
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if type == "button":
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param_ui.addEmpty()
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else:
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param_ui.addLabel(label or name)
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param_ui.addElement(name=name, type=type, value=value, callback_id=callback_id)
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return param_ui.toXml()
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class XMLUI:
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"""This class is used to create a user interface (form/window/parameters/etc) using SàT XML"""
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def __init__(self, panel_type, layout="vertical", title=None):
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"""Init SàT XML Panel
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@param panel_type: one of
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- window (new window)
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- form (formulaire, depend of the frontend, usually a panel with cancel/submit buttons)
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- param (parameters, presentatio depend of the frontend)
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@param layout: disposition of elements, one of:
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- vertical: elements are disposed up to bottom
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- horizontal: elements are disposed left to right
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- pairs: elements come on two aligned columns
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(usually one for a label, the next for the element)
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- tabs: elemens are in categories with tabs (notebook)
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@param title: title or default if None
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"""
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if not panel_type in ['window', 'form', 'param']:
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error(_("Unknown panel type [%s]") % panel_type)
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assert(False)
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self.type = panel_type
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impl = minidom.getDOMImplementation()
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self.doc = impl.createDocument(None, "sat_xmlui", None)
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top_element = self.doc.documentElement
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top_element.setAttribute("type", panel_type)
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if title:
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top_element.setAttribute("title", title)
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self.parentTabsLayout = None #used only we have 'tabs' layout
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self.currentCategory = None #used only we have 'tabs' layout
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self.changeLayout(layout)
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def __del__(self):
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self.doc.unlink()
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def __createLayout(self, layout, parent=None):
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"""Create a layout element
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@param type: layout type (cf init doc)
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@parent: parent element or None
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"""
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if not layout in ['vertical', 'horizontal', 'pairs', 'tabs']:
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error (_("Unknown layout type [%s]") % layout)
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assert (False)
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layout_elt = self.doc.createElement('layout')
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layout_elt.setAttribute('type',layout)
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if parent != None:
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parent.appendChild(layout_elt)
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return layout_elt
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def __createElem(self, type, name=None, parent = None):
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"""Create an element
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@param type: one of
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- empty: empty element (usefull to skip something in a layout, e.g. skip first element in a PAIRS layout)
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- text: text to be displayed in an multi-line area, e.g. instructions
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@param name: name of the element or None
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@param parent: parent element or None
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"""
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elem = self.doc.createElement('elem')
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if name:
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elem.setAttribute('name', name)
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elem.setAttribute('type', type)
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if parent != None:
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parent.appendChild(elem)
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return elem
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def changeLayout(self, layout):
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"""Change the current layout"""
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self.currentLayout = self.__createLayout(layout, self.currentCategory if self.currentCategory else self.doc.documentElement)
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if layout == "tabs":
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self.parentTabsLayout = self.currentLayout
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def addEmpty(self, name=None):
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"""Add a multi-lines text"""
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elem = self.__createElem('empty', name, self.currentLayout)
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def addText(self, text, name=None):
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"""Add a multi-lines text"""
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elem = self.__createElem('text', name, self.currentLayout)
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text = self.doc.createTextNode(text)
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elem.appendChild(text)
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def addLabel(self, text, name=None):
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"""Add a single line text, mainly useful as label before element"""
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elem = self.__createElem('label', name, self.currentLayout)
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elem.setAttribute('value', text)
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def addString(self, name=None, value=None):
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"""Add a string box"""
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elem = self.__createElem('string', name, self.currentLayout)
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if value:
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elem.setAttribute('value', value)
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def addPassword(self, name=None, value=None):
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"""Add a password box"""
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elem = self.__createElem('password', name, self.currentLayout)
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if value:
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elem.setAttribute('value', value)
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def addTextBox(self, name=None, value=None):
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"""Add a string box"""
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elem = self.__createElem('textbox', name, self.currentLayout)
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if value:
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elem.setAttribute('value', value)
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def addBool(self, name=None, value="true"):
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"""Add a string box"""
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assert value in ["true","false"]
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elem = self.__createElem('bool', name, self.currentLayout)
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elem.setAttribute('value', value)
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def addList(self, options, name=None, value=None, style=set()):
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"""Add a list of choices"""
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styles = set(style)
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assert (options)
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assert (styles.issubset(['multi']))
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elem = self.__createElem('list', name, self.currentLayout)
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self.addOptions(options, elem)
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if value:
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elem.setAttribute('value', value)
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for style in styles:
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elem.setAttribute(style, 'yes')
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def addButton(self, callback_id, name, value, fields_back=[]):
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"""Add a button
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@param callback: callback which will be called if button is pressed
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@param name: name
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@param value: label of the button
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@fields_back: list of names of field to give back when pushing the button"""
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elem = self.__createElem('button', name, self.currentLayout)
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elem.setAttribute('callback_id', callback_id)
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elem.setAttribute('value', value)
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for field in fields_back:
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fback_el = self.doc.createElement('field_back')
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fback_el.setAttribute('name', field)
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elem.appendChild(fback_el)
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def addElement(self, type, name = None, value = None, options = None, callback_id = None):
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"""Convenience method to add element, the params correspond to the ones in addSomething methods"""
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if type == 'empty':
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self.addEmpty(name)
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elif type == 'text':
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assert(value!=None)
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self.addText(value, name)
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elif type == 'label':
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assert(value)
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self.addLabel(value)
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elif type == 'string':
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self.addString(name, value)
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elif type == 'password':
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self.addPassword(name, value)
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elif type == 'textbox':
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self.addTextBox(name, value)
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elif type == 'bool':
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if not value:
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value = "true"
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self.addBool(name, value)
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elif type == 'list':
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self.addList(options, name, value)
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elif type == 'button':
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assert(callback_id and value)
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self.addButton(callback_id, name, value)
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def addOptions(self, options, parent):
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"""Add options to a multi-values element (e.g. list)
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@param parent: multi-values element"""
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for option in options:
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opt = self.doc.createElement('option')
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opt.setAttribute('value', option)
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parent.appendChild(opt)
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def addCategory(self, name, layout, label=None):
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"""Add a category to current layout (must be a tabs layout)"""
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assert(layout != 'tabs')
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if not self.parentTabsLayout:
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error(_("Trying to add a category without parent tabs layout"))
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assert(False)
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if self.parentTabsLayout.getAttribute('type') != 'tabs':
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error(_("parent layout of a category is not tabs"))
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assert(False)
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if not label:
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label = name
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self.currentCategory = cat = self.doc.createElement('category')
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cat.setAttribute('name', name)
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cat.setAttribute('label', label)
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self.changeLayout(layout)
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self.parentTabsLayout.appendChild(cat)
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def toXml(self):
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"""return the XML representation of the panel"""
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return self.doc.toxml()
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