Mercurial > libervia-backend
annotate src/tools/xml_tools.py @ 630:0b914394e74f
core: added advanced list to XMLUI (need improvment, very basic so far)
- the advanced list use headers which can be used as columns
- in the future, should provide the ability to highly customize list disposition, in a way similar to Amarok 2's playlist.
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Sun, 08 Sep 2013 18:05:19 +0200 |
| parents | 6f4c31192c7c |
| children | 17bd09cd1001 |
| rev | line source |
|---|---|
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1 #!/usr/bin/python |
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2 # -*- coding: utf-8 -*- |
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3 |
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4 # SAT: a jabber client |
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013 Jérôme Poisson (goffi@goffi.org) |
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6 |
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7 # This program is free software: you can redistribute it and/or modify |
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8 # it under the terms of the GNU Affero General Public License as published by |
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9 # the Free Software Foundation, either version 3 of the License, or |
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10 # (at your option) any later version. |
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11 |
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12 # This program is distributed in the hope that it will be useful, |
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 # GNU Affero General Public License for more details. |
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16 |
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17 # You should have received a copy of the GNU Affero General Public License |
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 |
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20 from logging import debug, info, error |
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21 from xml.dom import minidom |
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22 from wokkel import data_form |
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23 from twisted.words.xish import domish |
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24 from core import exceptions |
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25 |
| 102 | 26 """This library help manage XML used in SàT (parameters, registration, etc) """ |
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27 |
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28 |
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29 def dataForm2XML(form): |
| 102 | 30 """Take a data form (xep-0004, Wokkel's implementation) and convert it to a SàT xml""" |
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31 |
| 105 | 32 form_ui = XMLUI("form", "vertical") |
| 104 | 33 |
| 102 | 34 if form.instructions: |
| 105 | 35 form_ui.addText('\n'.join(form.instructions), 'instructions') |
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36 |
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37 labels = [field for field in form.fieldList if field.label] |
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38 if labels: |
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39 # if there is no label, we don't need to use pairs |
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40 form_ui.changeLayout("pairs") |
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41 |
| 102 | 42 for field in form.fieldList: |
| 43 if field.fieldType == 'fixed': | |
| 44 __field_type = 'text' | |
| 45 elif field.fieldType == 'text-single': | |
| 46 __field_type = "string" | |
| 47 elif field.fieldType == 'text-private': | |
| 48 __field_type = "password" | |
| 49 elif field.fieldType == 'list-single': | |
| 50 __field_type = "list" | |
| 51 else: | |
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52 error(u"FIXME FIXME FIXME: Type [%s] is not managed yet by SàT" % field.fieldType) |
| 102 | 53 __field_type = "string" |
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54 |
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55 if labels: |
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56 if field.label: |
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57 form_ui.addLabel(field.label) |
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58 else: |
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59 form_ui.addEmpty() |
| 103 | 60 |
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61 form_ui.addElement(__field_type, field.var, field.value, [option.value for option in field.options]) |
| 105 | 62 return form_ui.toXml() |
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63 |
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64 def dataFormResult2AdvancedList(form_ui, form_xml): |
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65 """Take a raw data form (not parsed by XEP-0004) and convert it to an advanced list |
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66 raw data form is used because Wokkel doesn't manage result items parsing yet |
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67 @param form_ui: the XMLUI where the AdvancedList will be added² |
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68 @param form_xml: domish.Element of the data form |
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69 @return: AdvancedList element |
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70 """ |
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71 headers = [] |
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72 items = [] |
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73 try: |
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74 reported_elt = form_xml.elements('jabber:x:data', 'reported').next() |
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75 except StopIteration: |
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76 raise exceptions.DataError("Couldn't find expected <reported> tag") |
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77 |
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78 for elt in reported_elt.children: |
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79 if elt.name != "field": |
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80 raise exceptions.DataError("Unexpected tag") |
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81 name = elt["var"] |
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82 label = elt.attributes.get('label','') |
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83 type_ = elt.attributes.get('type','') # TODO |
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84 headers.append(Header(name, label)) |
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85 |
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86 if not headers: |
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87 raise DataError("No reported fields (see XEP-0004 §3.4)") |
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88 |
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89 item_elts = form_xml.elements('jabber:x:data', 'item') |
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90 |
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91 for item_elt in item_elts: |
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92 fields = [] |
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93 for elt in item_elt.children: |
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94 if elt.name != 'field': |
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95 warning("Unexpected tag (%s)" % elt.name) |
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96 continue |
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97 name = elt['var'] |
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98 child_elt = elt.firstChildElement() |
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99 if child_elt.name != "value": |
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100 raise DataError('Was expecting <value> tag') |
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101 value = unicode(child_elt) |
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102 fields.append(Field(name, value)) |
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103 items.append(Item(' | '.join((field.value for field in fields if field)), fields)) |
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104 |
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105 return form_ui.addAdvancedList(None, headers, items) |
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106 |
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107 |
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108 def dataFormResult2XML(form_xml): |
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109 """Take a raw data form (not parsed by XEP-0004) and convert it to a SàT XMLUI |
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110 raw data form is used because Wokkel doesn't manage result items parsing yet |
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111 @param form_xml: domish.Element of the data form |
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112 @return: XMLUI interface |
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113 """ |
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114 |
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115 form_ui = XMLUI("window", "vertical") |
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116 dataFormResult2AdvancedList(form_ui, form_xml) |
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117 return form_ui.toXml() |
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118 |
| 102 | 119 def tupleList2dataForm(values): |
| 120 """convert a list of tuples (name,value) to a wokkel submit data form""" | |
| 121 form = data_form.Form('submit') | |
| 122 for value in values: | |
| 123 field = data_form.Field(var=value[0], value=value[1]) | |
| 124 form.addField(field) | |
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125 |
| 102 | 126 return form |
| 103 | 127 |
| 105 | 128 def paramsXml2xmlUI(xml): |
| 129 """Convert the xml for parameter to a SàT XML User Interface""" | |
| 214 | 130 params_doc = minidom.parseString(xml.encode('utf-8')) |
| 105 | 131 top = params_doc.documentElement |
| 132 if top.nodeName != 'params': | |
| 133 error(_('INTERNAL ERROR: parameters xml not valid')) | |
| 134 assert(False) | |
| 135 param_ui = XMLUI("param", "tabs") | |
| 136 for category in top.getElementsByTagName("category"): | |
| 137 name = category.getAttribute('name') | |
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138 label = category.getAttribute('label') |
| 105 | 139 if not name: |
| 140 error(_('INTERNAL ERROR: params categories must have a name')) | |
| 141 assert(False) | |
|
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142 param_ui.addCategory(name, 'pairs', label=label) |
| 105 | 143 for param in category.getElementsByTagName("param"): |
| 144 name = param.getAttribute('name') | |
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145 label = param.getAttribute('label') |
| 105 | 146 if not name: |
| 147 error(_('INTERNAL ERROR: params must have a name')) | |
| 148 assert(False) | |
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149 type_ = param.getAttribute('type') |
| 105 | 150 value = param.getAttribute('value') or None |
| 106 | 151 callback_id = param.getAttribute('callback_id') or None |
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152 if type_ == "button": |
| 106 | 153 param_ui.addEmpty() |
| 154 else: | |
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155 param_ui.addLabel(label or name) |
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156 param_ui.addElement(name=name, type_=type_, value=value, callback_id=callback_id) |
| 105 | 157 |
| 158 return param_ui.toXml() | |
| 159 | |
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160 |
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161 class Header(object): |
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162 """AdvandeList's header""" |
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163 |
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164 def __init__(self, field_name, label, description=None, type_=None): |
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165 """ |
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166 @param field_name: name of the field referenced |
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167 @param label: label to be displayed in columns |
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168 @param description: long descriptive text |
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169 @param type_: TODO |
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170 |
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171 """ |
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172 self.field_name = field_name |
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173 self.label = label |
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174 self.description = description |
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175 self.type = type_ |
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176 if type_ is not None: |
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177 raise NotImplementedError # TODO: |
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178 |
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179 |
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180 class Item(object): |
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181 """Item used in AdvancedList""" |
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182 |
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183 def __init__(self, text=None, fields=None): |
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184 """ |
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185 @param text: Optional textual representation, when fields are not showed individually |
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186 @param fields: list of Field instances² |
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187 """ |
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188 self.text = text |
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189 self.fields = fields if fields is not None else [] |
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190 |
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191 |
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192 class Field(object): |
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193 """Field used in AdvancedList (in items)""" |
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194 |
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195 def __init__(self, name, value): |
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196 """ |
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197 @param name: name of the field, used to identify the field in headers |
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198 @param value: actual content of the field |
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199 """ |
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200 self.name = name |
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201 self.value = value |
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202 |
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203 |
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204 |
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205 class XMLUI(object): |
| 103 | 206 """This class is used to create a user interface (form/window/parameters/etc) using SàT XML""" |
| 207 | |
| 107 | 208 def __init__(self, panel_type, layout="vertical", title=None): |
| 103 | 209 """Init SàT XML Panel |
| 210 @param panel_type: one of | |
| 211 - window (new window) | |
| 212 - form (formulaire, depend of the frontend, usually a panel with cancel/submit buttons) | |
| 213 - param (parameters, presentatio depend of the frontend) | |
| 214 @param layout: disposition of elements, one of: | |
| 107 | 215 - vertical: elements are disposed up to bottom |
| 216 - horizontal: elements are disposed left to right | |
| 217 - pairs: elements come on two aligned columns | |
| 103 | 218 (usually one for a label, the next for the element) |
| 107 | 219 - tabs: elemens are in categories with tabs (notebook) |
| 220 @param title: title or default if None | |
| 103 | 221 """ |
| 222 if not panel_type in ['window', 'form', 'param']: | |
| 223 error(_("Unknown panel type [%s]") % panel_type) | |
| 224 assert(False) | |
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225 self.type_ = panel_type |
| 103 | 226 impl = minidom.getDOMImplementation() |
| 227 | |
| 228 self.doc = impl.createDocument(None, "sat_xmlui", None) | |
| 229 top_element = self.doc.documentElement | |
| 230 top_element.setAttribute("type", panel_type) | |
| 107 | 231 if title: |
| 232 top_element.setAttribute("title", title) | |
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233 self.parentTabsLayout = None # used only we have 'tabs' layout |
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234 self.currentCategory = None # used only we have 'tabs' layout |
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235 self.currentLayout = None |
| 104 | 236 self.changeLayout(layout) |
| 103 | 237 |
| 238 def __del__(self): | |
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239 self.doc.unlink() |
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240 |
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241 def _createLayout(self, layout, parent=None): |
| 103 | 242 """Create a layout element |
| 243 @param type: layout type (cf init doc) | |
| 244 @parent: parent element or None | |
| 245 """ | |
| 104 | 246 if not layout in ['vertical', 'horizontal', 'pairs', 'tabs']: |
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247 error(_("Unknown layout type [%s]") % layout) |
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248 assert False |
| 103 | 249 layout_elt = self.doc.createElement('layout') |
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250 layout_elt.setAttribute('type', layout) |
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251 if parent is not None: |
| 103 | 252 parent.appendChild(layout_elt) |
| 253 return layout_elt | |
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254 |
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255 def _createElem(self, type_, name=None, parent=None): |
| 103 | 256 """Create an element |
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257 @param type_: one of |
| 103 | 258 - empty: empty element (usefull to skip something in a layout, e.g. skip first element in a PAIRS layout) |
| 259 - text: text to be displayed in an multi-line area, e.g. instructions | |
| 260 @param name: name of the element or None | |
| 261 @param parent: parent element or None | |
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262 @return: created element |
| 103 | 263 """ |
| 264 elem = self.doc.createElement('elem') | |
| 265 if name: | |
| 266 elem.setAttribute('name', name) | |
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267 elem.setAttribute('type', type_) |
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268 if parent is not None: |
| 103 | 269 parent.appendChild(elem) |
| 270 return elem | |
| 271 | |
| 272 def changeLayout(self, layout): | |
| 273 """Change the current layout""" | |
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274 self.currentLayout = self._createLayout(layout, self.currentCategory if self.currentCategory else self.doc.documentElement) |
| 104 | 275 if layout == "tabs": |
| 276 self.parentTabsLayout = self.currentLayout | |
| 103 | 277 |
| 278 def addEmpty(self, name=None): | |
| 279 """Add a multi-lines text""" | |
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280 return self._createElem('empty', name, self.currentLayout) |
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281 |
| 103 | 282 def addText(self, text, name=None): |
| 283 """Add a multi-lines text""" | |
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284 elem = self._createElem('text', name, self.currentLayout) |
| 103 | 285 text = self.doc.createTextNode(text) |
| 286 elem.appendChild(text) | |
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287 return elem |
| 103 | 288 |
| 289 def addLabel(self, text, name=None): | |
| 290 """Add a single line text, mainly useful as label before element""" | |
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291 elem = self._createElem('label', name, self.currentLayout) |
| 103 | 292 elem.setAttribute('value', text) |
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293 return elem |
| 103 | 294 |
| 295 def addString(self, name=None, value=None): | |
| 296 """Add a string box""" | |
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297 elem = self._createElem('string', name, self.currentLayout) |
| 103 | 298 if value: |
| 299 elem.setAttribute('value', value) | |
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300 return elem |
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301 |
| 103 | 302 def addPassword(self, name=None, value=None): |
| 303 """Add a password box""" | |
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304 elem = self._createElem('password', name, self.currentLayout) |
| 103 | 305 if value: |
| 306 elem.setAttribute('value', value) | |
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307 return elem |
| 103 | 308 |
| 107 | 309 def addTextBox(self, name=None, value=None): |
| 310 """Add a string box""" | |
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311 elem = self._createElem('textbox', name, self.currentLayout) |
| 107 | 312 if value: |
| 313 elem.setAttribute('value', value) | |
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314 return elem |
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315 |
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316 def addBool(self, name=None, value="true"): |
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317 """Add a string box""" |
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318 assert value in ["true", "false"] |
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319 elem = self._createElem('bool', name, self.currentLayout) |
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320 elem.setAttribute('value', value) |
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321 return elem |
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322 |
| 107 | 323 def addList(self, options, name=None, value=None, style=set()): |
| 103 | 324 """Add a list of choices""" |
| 107 | 325 styles = set(style) |
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326 assert options |
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327 assert styles.issubset(['multi']) |
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328 elem = self._createElem('list', name, self.currentLayout) |
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329 self.addOptions(options, elem) |
| 103 | 330 if value: |
| 331 elem.setAttribute('value', value) | |
| 107 | 332 for style in styles: |
| 333 elem.setAttribute(style, 'yes') | |
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334 return elem |
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335 |
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336 def addAdvancedList(self, name=None, headers=None, items=None): |
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337 """Create an advanced list |
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338 @param headers: optional headers informations |
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339 @param items: list of Item instances |
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340 @return: created element |
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341 """ |
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342 elem = self._createElem('advanced_list', name, self.currentLayout) |
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343 self.addHeaders(headers, elem) |
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344 if items: |
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345 self.addItems(items, elem) |
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346 return elem |
| 105 | 347 |
| 107 | 348 def addButton(self, callback_id, name, value, fields_back=[]): |
| 105 | 349 """Add a button |
| 350 @param callback: callback which will be called if button is pressed | |
| 106 | 351 @param name: name |
| 107 | 352 @param value: label of the button |
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353 @fields_back: list of names of field to give back when pushing the button |
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354 """ |
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355 elem = self._createElem('button', name, self.currentLayout) |
| 106 | 356 elem.setAttribute('callback_id', callback_id) |
| 107 | 357 elem.setAttribute('value', value) |
| 358 for field in fields_back: | |
| 359 fback_el = self.doc.createElement('field_back') | |
| 360 fback_el.setAttribute('name', field) | |
| 361 elem.appendChild(fback_el) | |
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362 return elem |
| 107 | 363 |
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364 def addElement(self, type_, name=None, value=None, options=None, callback_id=None, headers=None, available=None): |
| 103 | 365 """Convenience method to add element, the params correspond to the ones in addSomething methods""" |
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366 if type_ == 'empty': |
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367 return self.addEmpty(name) |
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368 elif type_ == 'text': |
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369 assert value is not None |
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370 return self.addText(value, name) |
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371 elif type_ == 'label': |
| 103 | 372 assert(value) |
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373 return self.addLabel(value) |
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374 elif type_ == 'string': |
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375 return self.addString(name, value) |
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376 elif type_ == 'password': |
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377 return self.addPassword(name, value) |
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378 elif type_ == 'textbox': |
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379 return self.addTextBox(name, value) |
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380 elif type_ == 'bool': |
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381 if not value: |
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382 value = "true" |
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383 return self.addBool(name, value) |
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384 elif type_ == 'list': |
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385 return self.addList(options, name, value) |
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386 elif type_ == 'advancedlist': |
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387 return self.addAdvancedList(name, headers, available) |
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388 elif type_ == 'button': |
| 106 | 389 assert(callback_id and value) |
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390 return self.addButton(callback_id, name, value) |
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391 |
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392 # List |
| 103 | 393 |
| 394 def addOptions(self, options, parent): | |
| 395 """Add options to a multi-values element (e.g. list) | |
| 396 @param parent: multi-values element""" | |
| 397 for option in options: | |
| 398 opt = self.doc.createElement('option') | |
| 399 opt.setAttribute('value', option) | |
| 400 parent.appendChild(opt) | |
| 401 | |
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402 # Advanced list |
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403 |
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404 def addHeaders(self, headers, parent): |
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405 headers_elt = self.doc.createElement('headers') |
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406 for header in headers: |
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407 field_elt = self.doc.createElement('field') |
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408 field_elt.setAttribute('field_name', header.field_name) |
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409 field_elt.setAttribute('label', header.label) |
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410 if header.description: |
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411 field_elt.setAttribute('description', header.description) |
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412 if header.type: |
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413 field_elt.setAttribute('type', header.type) |
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414 headers_elt.appendChild(field_elt) |
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415 parent.appendChild(headers_elt) |
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416 |
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417 def addItems(self, items, parent): |
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418 """Add items to an AdvancedList |
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419 @param items: list of Item instances |
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420 @param parent: parent element (should be addAdvancedList) |
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421 |
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422 """ |
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423 items_elt = self.doc.createElement('items') |
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424 for item in items: |
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425 item_elt = self.doc.createElement('item') |
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426 if item.text is not None: |
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427 text_elt = self.doc.createElement('text') |
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428 text_elt.appendChild(self.doc.createTextNode(item.text)) |
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429 item_elt.appendChild(text_elt) |
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430 |
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431 for field in item.fields: |
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432 field_elt = self.doc.createElement('field') |
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433 field_elt.setAttribute('name', field.name) |
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434 field_elt.setAttribute('value', field.value) |
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435 item_elt.appendChild(field_elt) |
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436 |
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437 items_elt.appendChild(item_elt) |
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438 |
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439 parent.appendChild(items_elt) |
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440 |
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441 # Tabs |
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442 |
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443 def addCategory(self, name, layout, label=None): |
| 104 | 444 """Add a category to current layout (must be a tabs layout)""" |
| 445 assert(layout != 'tabs') | |
| 446 if not self.parentTabsLayout: | |
| 447 error(_("Trying to add a category without parent tabs layout")) | |
| 448 assert(False) | |
| 449 if self.parentTabsLayout.getAttribute('type') != 'tabs': | |
| 450 error(_("parent layout of a category is not tabs")) | |
| 451 assert(False) | |
|
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452 |
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453 if not label: |
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454 label = name |
| 104 | 455 self.currentCategory = cat = self.doc.createElement('category') |
| 456 cat.setAttribute('name', name) | |
|
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457 cat.setAttribute('label', label) |
| 104 | 458 self.changeLayout(layout) |
| 459 self.parentTabsLayout.appendChild(cat) | |
| 460 | |
| 103 | 461 def toXml(self): |
|
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462 """return the XML representation of the panel""" |
| 103 | 463 return self.doc.toxml() |
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464 |
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465 |
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466 class ElementParser(object): |
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467 """callable class to parse XML string into Element |
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468 Found at http://stackoverflow.com/questions/2093400/how-to-create-twisted-words-xish-domish-element-entirely-from-raw-xml/2095942#2095942 |
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469 (c) Karl Anderson""" |
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470 |
|
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471 def __call__(self, string): |
|
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472 self.result = None |
|
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473 |
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474 def onStart(elem): |
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475 self.result = elem |
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476 |
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477 def onEnd(): |
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478 pass |
|
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479 |
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480 def onElement(elem): |
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481 self.result.addChild(elem) |
|
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482 |
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483 parser = domish.elementStream() |
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484 parser.DocumentStartEvent = onStart |
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485 parser.ElementEvent = onElement |
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486 parser.DocumentEndEvent = onEnd |
|
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487 tmp = domish.Element((None, "s")) |
|
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488 tmp.addRawXml(string.replace('\n', ' ').replace('\t', ' ')) |
| 304 | 489 parser.parse(tmp.toXml().encode('utf-8')) |
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490 return self.result.firstChildElement() |