Mercurial > libervia-backend
annotate src/tools/xml_tools.py @ 798:8f5479f8709a
core: XMLUI now use @property for session_id and submit
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Tue, 04 Feb 2014 18:02:40 +0100 |
| parents | 46aa5ada61bf |
| children | e0770d977d58 |
| 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 |
| 771 | 20 from sat.core.i18n import _ |
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21 from logging import debug, info, error, warning |
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22 from xml.dom import minidom, NotFoundErr |
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23 from wokkel import data_form |
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24 from twisted.words.xish import domish |
| 645 | 25 from sat.core import exceptions |
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26 |
| 102 | 27 """This library help manage XML used in SàT (parameters, registration, etc) """ |
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28 |
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29 SAT_FORM_PREFIX = "SAT_FORM_" |
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30 SAT_PARAM_SEPARATOR = "_XMLUI_PARAM_" # used to have unique elements names |
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31 |
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32 def dataForm2XMLUI(form, submit_id, session_id=None): |
| 102 | 33 """Take a data form (xep-0004, Wokkel's implementation) and convert it to a SàT xml""" |
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34 |
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35 form_ui = XMLUI("form", "vertical", submit_id=submit_id, session_id=session_id) |
| 104 | 36 |
| 102 | 37 if form.instructions: |
| 105 | 38 form_ui.addText('\n'.join(form.instructions), 'instructions') |
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39 |
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40 labels = [field for field in form.fieldList if field.label] |
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41 if labels: |
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42 # if there is no label, we don't need to use pairs |
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43 form_ui.changeLayout("pairs") |
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44 |
| 102 | 45 for field in form.fieldList: |
| 46 if field.fieldType == 'fixed': | |
| 47 __field_type = 'text' | |
| 48 elif field.fieldType == 'text-single': | |
| 49 __field_type = "string" | |
| 50 elif field.fieldType == 'text-private': | |
| 51 __field_type = "password" | |
| 52 elif field.fieldType == 'list-single': | |
| 53 __field_type = "list" | |
| 54 else: | |
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55 error(u"FIXME FIXME FIXME: Type [%s] is not managed yet by SàT" % field.fieldType) |
| 102 | 56 __field_type = "string" |
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57 |
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58 if labels: |
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59 if field.label: |
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60 form_ui.addLabel(field.label) |
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61 else: |
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62 form_ui.addEmpty() |
| 103 | 63 |
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64 form_ui.addElement(__field_type, field.var, field.value, [option.value for option in field.options]) |
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65 return form_ui |
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66 |
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67 def dataFormResult2AdvancedList(form_ui, form_xml): |
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68 """Take a raw data form (not parsed by XEP-0004) and convert it to an advanced list |
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69 raw data form is used because Wokkel doesn't manage result items parsing yet |
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70 @param form_ui: the XMLUI where the AdvancedList will be added |
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71 @param form_xml: domish.Element of the data form |
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72 @return: AdvancedList element |
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73 """ |
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74 headers = [] |
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75 items = [] |
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76 try: |
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77 reported_elt = form_xml.elements('jabber:x:data', 'reported').next() |
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78 except StopIteration: |
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79 raise exceptions.DataError("Couldn't find expected <reported> tag") |
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80 |
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81 for elt in reported_elt.elements(): |
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82 if elt.name != "field": |
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83 raise exceptions.DataError("Unexpected tag") |
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84 name = elt["var"] |
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85 label = elt.attributes.get('label','') |
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86 type_ = elt.attributes.get('type','') # TODO |
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87 headers.append(Header(name, label)) |
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88 |
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89 if not headers: |
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90 raise exceptions.DataError("No reported fields (see XEP-0004 §3.4)") |
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91 |
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92 item_elts = form_xml.elements('jabber:x:data', 'item') |
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93 |
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94 for item_elt in item_elts: |
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95 fields = [] |
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96 for elt in item_elt.elements(): |
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97 if elt.name != 'field': |
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98 warning("Unexpected tag (%s)" % elt.name) |
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99 continue |
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100 name = elt['var'] |
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101 child_elt = elt.firstChildElement() |
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102 if child_elt.name != "value": |
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103 raise exceptions.DataError('Was expecting <value> tag') |
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104 value = unicode(child_elt) |
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105 fields.append(Field(name, value)) |
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106 items.append(Item(' | '.join((field.value for field in fields if field)), fields)) |
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107 |
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108 return form_ui.addAdvancedList(None, headers, items) |
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109 |
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110 |
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111 def dataFormResult2XMLUI(form_xml, session_id=None): |
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112 """Take a raw data form (not parsed by XEP-0004) and convert it to a SàT XMLUI |
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113 raw data form is used because Wokkel doesn't manage result items parsing yet |
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114 @param form_xml: domish.Element of the data form |
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115 @return: XMLUI interface |
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116 """ |
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117 |
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118 form_ui = XMLUI("window", "vertical", session_id=session_id) |
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119 dataFormResult2AdvancedList(form_ui, form_xml) |
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120 return form_ui |
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121 |
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122 def XMLUIResult2DataFormResult(xmlui_data): |
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123 """ Extract form data from a XMLUI return |
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124 @xmlui_data: data returned by frontends for XMLUI form |
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125 @return: dict of data usable by Wokkel's dataform |
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126 """ |
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127 return {key[len(SAT_FORM_PREFIX):]: value for key, value in xmlui_data.iteritems() if key.startswith(SAT_FORM_PREFIX)} |
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128 |
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129 def XMLUIResultToElt(xmlui_data): |
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130 """ Construct result domish.Element from XMLUI result |
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131 @xmlui_data: data returned by frontends for XMLUI form |
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132 """ |
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133 form = data_form.Form('result') |
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134 form.makeFields(XMLUIResult2DataFormResult(xmlui_data)) |
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135 return form.toElement() |
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136 |
| 102 | 137 def tupleList2dataForm(values): |
| 138 """convert a list of tuples (name,value) to a wokkel submit data form""" | |
| 139 form = data_form.Form('submit') | |
| 140 for value in values: | |
| 141 field = data_form.Field(var=value[0], value=value[1]) | |
| 142 form.addField(field) | |
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143 |
| 102 | 144 return form |
| 103 | 145 |
| 105 | 146 def paramsXml2xmlUI(xml): |
| 147 """Convert the xml for parameter to a SàT XML User Interface""" | |
| 214 | 148 params_doc = minidom.parseString(xml.encode('utf-8')) |
| 105 | 149 top = params_doc.documentElement |
| 150 if top.nodeName != 'params': | |
| 151 error(_('INTERNAL ERROR: parameters xml not valid')) | |
| 152 assert(False) | |
| 153 param_ui = XMLUI("param", "tabs") | |
| 154 for category in top.getElementsByTagName("category"): | |
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155 category_name = category.getAttribute('name') |
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156 label = category.getAttribute('label') |
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157 if not category_name: |
| 105 | 158 error(_('INTERNAL ERROR: params categories must have a name')) |
| 159 assert(False) | |
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160 param_ui.addCategory(category_name, 'pairs', label=label) |
| 105 | 161 for param in category.getElementsByTagName("param"): |
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162 param_name = param.getAttribute('name') |
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163 label = param.getAttribute('label') |
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164 if not param_name: |
| 105 | 165 error(_('INTERNAL ERROR: params must have a name')) |
| 166 assert(False) | |
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167 type_ = param.getAttribute('type') |
| 105 | 168 value = param.getAttribute('value') or None |
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169 options = getOptions(param) |
| 106 | 170 callback_id = param.getAttribute('callback_id') or None |
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171 if type_ == "button": |
| 106 | 172 param_ui.addEmpty() |
| 173 else: | |
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174 param_ui.addLabel(label or param_name) |
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175 param_ui.addElement(name="%s%s%s" % (category_name, SAT_PARAM_SEPARATOR, param_name), type_=type_, value=value, options=options, callback_id=callback_id) |
| 105 | 176 |
| 177 return param_ui.toXml() | |
| 178 | |
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179 |
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180 def getOptions(param): |
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181 """Retrieve the options for list element. Allow listing the <option/> |
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182 tags directly in <param/> or in an intermediate <options/> tag.""" |
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183 elems = param.getElementsByTagName("options") |
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184 if len(elems) == 0: |
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185 elems = param.getElementsByTagName("option") |
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186 else: |
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187 elems = elems.item(0).getElementsByTagName("option") |
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188 if len(elems) == 0: |
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189 return [] |
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190 return [elem.getAttribute("value") for elem in elems] |
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191 |
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192 |
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193 class Header(object): |
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194 """AdvandeList's header""" |
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195 |
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196 def __init__(self, field_name, label, description=None, type_=None): |
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197 """ |
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198 @param field_name: name of the field referenced |
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199 @param label: label to be displayed in columns |
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200 @param description: long descriptive text |
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201 @param type_: TODO |
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202 |
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203 """ |
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204 self.field_name = field_name |
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205 self.label = label |
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206 self.description = description |
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207 self.type = type_ |
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208 if type_ is not None: |
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209 raise NotImplementedError # TODO: |
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210 |
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211 |
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212 class Item(object): |
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213 """Item used in AdvancedList""" |
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214 |
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215 def __init__(self, text=None, fields=None): |
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216 """ |
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217 @param text: Optional textual representation, when fields are not showed individually |
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218 @param fields: list of Field instances² |
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219 """ |
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220 self.text = text |
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221 self.fields = fields if fields is not None else [] |
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222 |
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223 |
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224 class Field(object): |
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225 """Field used in AdvancedList (in items)""" |
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226 |
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227 def __init__(self, name, value): |
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228 """ |
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229 @param name: name of the field, used to identify the field in headers |
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230 @param value: actual content of the field |
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231 """ |
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232 self.name = name |
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233 self.value = value |
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234 |
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235 |
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236 |
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237 class XMLUI(object): |
| 103 | 238 """This class is used to create a user interface (form/window/parameters/etc) using SàT XML""" |
| 239 | |
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240 def __init__(self, panel_type, layout="vertical", title=None, submit_id=None, session_id=None): |
| 103 | 241 """Init SàT XML Panel |
| 242 @param panel_type: one of | |
| 243 - window (new window) | |
| 244 - form (formulaire, depend of the frontend, usually a panel with cancel/submit buttons) | |
| 245 - param (parameters, presentatio depend of the frontend) | |
| 246 @param layout: disposition of elements, one of: | |
| 107 | 247 - vertical: elements are disposed up to bottom |
| 248 - horizontal: elements are disposed left to right | |
| 249 - pairs: elements come on two aligned columns | |
| 103 | 250 (usually one for a label, the next for the element) |
| 107 | 251 - tabs: elemens are in categories with tabs (notebook) |
| 252 @param title: title or default if None | |
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253 @param submit_id: callback id to call for panel_type we can submit (form, param) |
| 103 | 254 """ |
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255 if panel_type not in ['window', 'form', 'param']: |
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256 raise exceptions.DataError(_("Unknown panel type [%s]") % panel_type) |
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257 if panel_type == 'form' and submit_id is None: |
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258 raise exceptions.DataError(_("form XMLUI need a submit_id")) |
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259 self.type_ = panel_type |
| 103 | 260 impl = minidom.getDOMImplementation() |
| 261 | |
| 262 self.doc = impl.createDocument(None, "sat_xmlui", None) | |
| 263 top_element = self.doc.documentElement | |
| 264 top_element.setAttribute("type", panel_type) | |
| 107 | 265 if title: |
| 266 top_element.setAttribute("title", title) | |
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267 self.submit_id = submit_id |
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268 self.session_id = session_id |
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269 self.parentTabsLayout = None # used only we have 'tabs' layout |
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270 self.currentCategory = None # used only we have 'tabs' layout |
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271 self.currentLayout = None |
| 104 | 272 self.changeLayout(layout) |
| 103 | 273 |
| 274 def __del__(self): | |
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275 self.doc.unlink() |
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276 |
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277 @property |
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278 def submit_id(self): |
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279 top_element = self.doc.documentElement |
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280 value = top_element.getAttribute("submit") |
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281 return value or None |
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282 |
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283 @submit_id.setter |
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284 def submit_id(self, value): |
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285 top_element = self.doc.documentElement |
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286 if value is None: |
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287 try: |
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288 top_element.removeAttribute("submit") |
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289 except NotFoundErr: |
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290 pass |
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291 elif value: # submit_id can be the empty string to bypass form restriction |
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292 top_element.setAttribute("submit", value) |
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293 |
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294 @property |
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295 def session_id(self): |
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296 top_element = self.doc.documentElement |
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297 value = top_element.getAttribute("session_id") |
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298 return value or None |
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299 |
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300 @session_id.setter |
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301 def session_id(self, value): |
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302 top_element = self.doc.documentElement |
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303 if value is None: |
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304 try: |
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305 top_element.removeAttribute("session_id") |
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306 except NotFoundErr: |
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307 pass |
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308 elif value: |
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309 top_element.setAttribute("session_id", value) |
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310 else: |
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311 raise exceptions.DataError("session_id can't be empty") |
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312 |
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313 def _createLayout(self, layout, parent=None): |
| 103 | 314 """Create a layout element |
| 315 @param type: layout type (cf init doc) | |
| 316 @parent: parent element or None | |
| 317 """ | |
| 104 | 318 if not layout in ['vertical', 'horizontal', 'pairs', 'tabs']: |
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319 error(_("Unknown layout type [%s]") % layout) |
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320 assert False |
| 103 | 321 layout_elt = self.doc.createElement('layout') |
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322 layout_elt.setAttribute('type', layout) |
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323 if parent is not None: |
| 103 | 324 parent.appendChild(layout_elt) |
| 325 return layout_elt | |
|
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326 |
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327 def _createElem(self, type_, name=None, parent=None): |
| 103 | 328 """Create an element |
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329 @param type_: one of |
| 103 | 330 - empty: empty element (usefull to skip something in a layout, e.g. skip first element in a PAIRS layout) |
| 331 - text: text to be displayed in an multi-line area, e.g. instructions | |
| 332 @param name: name of the element or None | |
| 333 @param parent: parent element or None | |
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334 @return: created element |
| 103 | 335 """ |
| 336 elem = self.doc.createElement('elem') | |
| 337 if name: | |
| 338 elem.setAttribute('name', name) | |
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339 elem.setAttribute('type', type_) |
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340 if parent is not None: |
| 103 | 341 parent.appendChild(elem) |
| 342 return elem | |
| 343 | |
| 344 def changeLayout(self, layout): | |
| 345 """Change the current layout""" | |
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346 self.currentLayout = self._createLayout(layout, self.currentCategory if self.currentCategory else self.doc.documentElement) |
| 104 | 347 if layout == "tabs": |
| 348 self.parentTabsLayout = self.currentLayout | |
| 103 | 349 |
| 350 def addEmpty(self, name=None): | |
| 351 """Add a multi-lines text""" | |
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352 return self._createElem('empty', name, self.currentLayout) |
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353 |
| 103 | 354 def addText(self, text, name=None): |
| 355 """Add a multi-lines text""" | |
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356 elem = self._createElem('text', name, self.currentLayout) |
| 103 | 357 text = self.doc.createTextNode(text) |
| 358 elem.appendChild(text) | |
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359 return elem |
| 103 | 360 |
| 361 def addLabel(self, text, name=None): | |
| 362 """Add a single line text, mainly useful as label before element""" | |
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363 elem = self._createElem('label', name, self.currentLayout) |
| 103 | 364 elem.setAttribute('value', text) |
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365 return elem |
| 103 | 366 |
| 367 def addString(self, name=None, value=None): | |
| 368 """Add a string box""" | |
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369 elem = self._createElem('string', name, self.currentLayout) |
| 103 | 370 if value: |
| 371 elem.setAttribute('value', value) | |
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372 return elem |
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373 |
| 103 | 374 def addPassword(self, name=None, value=None): |
| 375 """Add a password box""" | |
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376 elem = self._createElem('password', name, self.currentLayout) |
| 103 | 377 if value: |
| 378 elem.setAttribute('value', value) | |
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379 return elem |
| 103 | 380 |
| 107 | 381 def addTextBox(self, name=None, value=None): |
| 382 """Add a string box""" | |
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383 elem = self._createElem('textbox', name, self.currentLayout) |
| 107 | 384 if value: |
| 385 elem.setAttribute('value', value) | |
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386 return elem |
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387 |
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388 def addBool(self, name=None, value="true"): |
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389 """Add a string box""" |
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390 assert value in ["true", "false"] |
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391 elem = self._createElem('bool', name, self.currentLayout) |
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392 elem.setAttribute('value', value) |
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393 return elem |
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394 |
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395 def addList(self, options, name=None, value=None, style=None): |
| 103 | 396 """Add a list of choices""" |
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397 if style is None: |
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398 style = set() |
| 107 | 399 styles = set(style) |
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400 assert options |
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401 assert styles.issubset(['multi']) |
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402 elem = self._createElem('list', name, self.currentLayout) |
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403 self.addOptions(options, elem) |
| 103 | 404 if value: |
| 405 elem.setAttribute('value', value) | |
| 107 | 406 for style in styles: |
| 407 elem.setAttribute(style, 'yes') | |
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408 return elem |
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409 |
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410 def addAdvancedList(self, name=None, headers=None, items=None): |
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411 """Create an advanced list |
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412 @param headers: optional headers informations |
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413 @param items: list of Item instances |
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414 @return: created element |
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415 """ |
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416 elem = self._createElem('advanced_list', name, self.currentLayout) |
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417 self.addHeaders(headers, elem) |
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418 if items: |
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419 self.addItems(items, elem) |
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420 return elem |
| 105 | 421 |
| 107 | 422 def addButton(self, callback_id, name, value, fields_back=[]): |
| 105 | 423 """Add a button |
| 424 @param callback: callback which will be called if button is pressed | |
| 106 | 425 @param name: name |
| 107 | 426 @param value: label of the button |
|
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427 @fields_back: list of names of field to give back when pushing the button |
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428 """ |
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429 elem = self._createElem('button', name, self.currentLayout) |
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430 elem.setAttribute('callback', callback_id) |
| 107 | 431 elem.setAttribute('value', value) |
| 432 for field in fields_back: | |
| 433 fback_el = self.doc.createElement('field_back') | |
| 434 fback_el.setAttribute('name', field) | |
| 435 elem.appendChild(fback_el) | |
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436 return elem |
| 107 | 437 |
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438 def addElement(self, type_, name=None, value=None, options=None, callback_id=None, headers=None, available=None): |
| 103 | 439 """Convenience method to add element, the params correspond to the ones in addSomething methods""" |
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440 if type_ == 'empty': |
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441 return self.addEmpty(name) |
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442 elif type_ == 'text': |
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443 assert value is not None |
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444 return self.addText(value, name) |
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445 elif type_ == 'label': |
| 103 | 446 assert(value) |
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447 return self.addLabel(value) |
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448 elif type_ == 'string': |
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449 return self.addString(name, value) |
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450 elif type_ == 'password': |
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451 return self.addPassword(name, value) |
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452 elif type_ == 'textbox': |
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453 return self.addTextBox(name, value) |
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454 elif type_ == 'bool': |
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455 if not value: |
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456 value = "true" |
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457 return self.addBool(name, value) |
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458 elif type_ == 'list': |
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459 return self.addList(options, name, value) |
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460 elif type_ == 'advancedlist': |
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461 return self.addAdvancedList(name, headers, available) |
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462 elif type_ == 'button': |
| 106 | 463 assert(callback_id and value) |
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464 return self.addButton(callback_id, name, value) |
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465 |
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466 # List |
| 103 | 467 |
| 468 def addOptions(self, options, parent): | |
| 469 """Add options to a multi-values element (e.g. list) | |
| 470 @param parent: multi-values element""" | |
| 471 for option in options: | |
| 472 opt = self.doc.createElement('option') | |
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473 if isinstance(option, basestring): |
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474 value, label = option, option |
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475 elif isinstance(option, tuple): |
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476 value, label = option |
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477 opt.setAttribute('value', value) |
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478 opt.setAttribute('label', label) |
| 103 | 479 parent.appendChild(opt) |
| 480 | |
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481 # Advanced list |
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482 |
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483 def addHeaders(self, headers, parent): |
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484 headers_elt = self.doc.createElement('headers') |
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485 for header in headers: |
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486 field_elt = self.doc.createElement('field') |
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487 field_elt.setAttribute('field_name', header.field_name) |
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488 field_elt.setAttribute('label', header.label) |
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489 if header.description: |
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490 field_elt.setAttribute('description', header.description) |
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491 if header.type: |
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492 field_elt.setAttribute('type', header.type) |
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493 headers_elt.appendChild(field_elt) |
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494 parent.appendChild(headers_elt) |
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495 |
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496 def addItems(self, items, parent): |
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497 """Add items to an AdvancedList |
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498 @param items: list of Item instances |
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499 @param parent: parent element (should be addAdvancedList) |
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500 |
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501 """ |
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502 items_elt = self.doc.createElement('items') |
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503 for item in items: |
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504 item_elt = self.doc.createElement('item') |
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505 if item.text is not None: |
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506 text_elt = self.doc.createElement('text') |
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507 text_elt.appendChild(self.doc.createTextNode(item.text)) |
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508 item_elt.appendChild(text_elt) |
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509 |
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510 for field in item.fields: |
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511 field_elt = self.doc.createElement('field') |
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512 field_elt.setAttribute('name', field.name) |
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513 field_elt.setAttribute('value', field.value) |
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514 item_elt.appendChild(field_elt) |
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515 |
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516 items_elt.appendChild(item_elt) |
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517 |
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518 parent.appendChild(items_elt) |
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519 |
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520 # Tabs |
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521 |
|
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522 def addCategory(self, name, layout, label=None): |
| 104 | 523 """Add a category to current layout (must be a tabs layout)""" |
| 524 assert(layout != 'tabs') | |
| 525 if not self.parentTabsLayout: | |
| 526 error(_("Trying to add a category without parent tabs layout")) | |
| 527 assert(False) | |
| 528 if self.parentTabsLayout.getAttribute('type') != 'tabs': | |
| 529 error(_("parent layout of a category is not tabs")) | |
| 530 assert(False) | |
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531 |
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532 if not label: |
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533 label = name |
| 104 | 534 self.currentCategory = cat = self.doc.createElement('category') |
| 535 cat.setAttribute('name', name) | |
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536 cat.setAttribute('label', label) |
| 104 | 537 self.changeLayout(layout) |
| 538 self.parentTabsLayout.appendChild(cat) | |
| 539 | |
| 103 | 540 def toXml(self): |
|
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541 """return the XML representation of the panel""" |
| 103 | 542 return self.doc.toxml() |
|
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543 |
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544 |
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545 class ElementParser(object): |
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546 """callable class to parse XML string into Element |
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547 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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548 (c) Karl Anderson""" |
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549 |
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550 def __call__(self, string): |
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551 self.result = None |
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552 |
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553 def onStart(elem): |
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554 self.result = elem |
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555 |
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556 def onEnd(): |
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557 pass |
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558 |
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559 def onElement(elem): |
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560 self.result.addChild(elem) |
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561 |
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562 parser = domish.elementStream() |
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563 parser.DocumentStartEvent = onStart |
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564 parser.ElementEvent = onElement |
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565 parser.DocumentEndEvent = onEnd |
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566 tmp = domish.Element((None, "s")) |
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567 tmp.addRawXml(string.replace('\n', ' ').replace('\t', ' ')) |
| 304 | 568 parser.parse(tmp.toXml().encode('utf-8')) |
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569 return self.result.firstChildElement() |