Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/lxml/html/formfill.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 from lxml.etree import XPath, ElementBase
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2 from lxml.html import fromstring, XHTML_NAMESPACE
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3 from lxml.html import _forms_xpath, _options_xpath, _nons, _transform_result
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4 from lxml.html import defs
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5 import copy
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6
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7 try:
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8 basestring
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9 except NameError:
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10 # Python 3
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11 basestring = str
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12
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13 __all__ = ['FormNotFound', 'fill_form', 'fill_form_html',
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14 'insert_errors', 'insert_errors_html',
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15 'DefaultErrorCreator']
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16
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17 class FormNotFound(LookupError):
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18 """
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19 Raised when no form can be found
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20 """
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21
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22 _form_name_xpath = XPath('descendant-or-self::form[name=$name]|descendant-or-self::x:form[name=$name]', namespaces={'x':XHTML_NAMESPACE})
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23 _input_xpath = XPath('|'.join(['descendant-or-self::'+_tag for _tag in ('input','select','textarea','x:input','x:select','x:textarea')]),
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24 namespaces={'x':XHTML_NAMESPACE})
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25 _label_for_xpath = XPath('//label[@for=$for_id]|//x:label[@for=$for_id]',
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26 namespaces={'x':XHTML_NAMESPACE})
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27 _name_xpath = XPath('descendant-or-self::*[@name=$name]')
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28
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29 def fill_form(
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30 el,
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31 values,
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32 form_id=None,
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33 form_index=None,
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34 ):
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35 el = _find_form(el, form_id=form_id, form_index=form_index)
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36 _fill_form(el, values)
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37
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38 def fill_form_html(html, values, form_id=None, form_index=None):
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39 result_type = type(html)
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40 if isinstance(html, basestring):
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41 doc = fromstring(html)
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42 else:
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43 doc = copy.deepcopy(html)
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44 fill_form(doc, values, form_id=form_id, form_index=form_index)
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45 return _transform_result(result_type, doc)
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46
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47 def _fill_form(el, values):
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48 counts = {}
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49 if hasattr(values, 'mixed'):
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50 # For Paste request parameters
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51 values = values.mixed()
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52 inputs = _input_xpath(el)
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53 for input in inputs:
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54 name = input.get('name')
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55 if not name:
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56 continue
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57 if _takes_multiple(input):
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58 value = values.get(name, [])
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59 if not isinstance(value, (list, tuple)):
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60 value = [value]
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61 _fill_multiple(input, value)
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62 elif name not in values:
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63 continue
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64 else:
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65 index = counts.get(name, 0)
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66 counts[name] = index + 1
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67 value = values[name]
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68 if isinstance(value, (list, tuple)):
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69 try:
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70 value = value[index]
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71 except IndexError:
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72 continue
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73 elif index > 0:
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74 continue
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75 _fill_single(input, value)
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76
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77 def _takes_multiple(input):
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78 if _nons(input.tag) == 'select' and input.get('multiple'):
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79 # FIXME: multiple="0"?
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80 return True
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81 type = input.get('type', '').lower()
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82 if type in ('radio', 'checkbox'):
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83 return True
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84 return False
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85
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86 def _fill_multiple(input, value):
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87 type = input.get('type', '').lower()
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88 if type == 'checkbox':
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89 v = input.get('value')
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90 if v is None:
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91 if not value:
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92 result = False
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93 else:
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94 result = value[0]
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95 if isinstance(value, basestring):
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96 # The only valid "on" value for an unnamed checkbox is 'on'
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97 result = result == 'on'
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98 _check(input, result)
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99 else:
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100 _check(input, v in value)
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101 elif type == 'radio':
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102 v = input.get('value')
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103 _check(input, v in value)
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104 else:
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105 assert _nons(input.tag) == 'select'
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106 for option in _options_xpath(input):
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107 v = option.get('value')
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108 if v is None:
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109 # This seems to be the default, at least on IE
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110 # FIXME: but I'm not sure
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111 v = option.text_content()
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112 _select(option, v in value)
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113
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114 def _check(el, check):
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115 if check:
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116 el.set('checked', '')
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117 else:
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118 if 'checked' in el.attrib:
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119 del el.attrib['checked']
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120
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121 def _select(el, select):
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122 if select:
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123 el.set('selected', '')
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124 else:
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125 if 'selected' in el.attrib:
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126 del el.attrib['selected']
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127
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diff changeset
128 def _fill_single(input, value):
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129 if _nons(input.tag) == 'textarea':
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130 input.text = value
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131 else:
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132 input.set('value', value)
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133
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134 def _find_form(el, form_id=None, form_index=None):
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135 if form_id is None and form_index is None:
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136 forms = _forms_xpath(el)
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137 for form in forms:
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138 return form
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139 raise FormNotFound(
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140 "No forms in page")
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141 if form_id is not None:
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142 form = el.get_element_by_id(form_id)
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143 if form is not None:
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144 return form
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145 forms = _form_name_xpath(el, name=form_id)
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146 if forms:
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147 return forms[0]
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148 else:
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149 raise FormNotFound(
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150 "No form with the name or id of %r (forms: %s)"
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151 % (id, ', '.join(_find_form_ids(el))))
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152 if form_index is not None:
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153 forms = _forms_xpath(el)
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154 try:
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155 return forms[form_index]
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156 except IndexError:
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157 raise FormNotFound(
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158 "There is no form with the index %r (%i forms found)"
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159 % (form_index, len(forms)))
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160
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161 def _find_form_ids(el):
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162 forms = _forms_xpath(el)
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163 if not forms:
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164 yield '(no forms)'
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165 return
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166 for index, form in enumerate(forms):
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167 if form.get('id'):
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168 if form.get('name'):
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169 yield '%s or %s' % (form.get('id'),
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170 form.get('name'))
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171 else:
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172 yield form.get('id')
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173 elif form.get('name'):
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parents:
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174 yield form.get('name')
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175 else:
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176 yield '(unnamed form %s)' % index
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177
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178 ############################################################
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179 ## Error filling
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180 ############################################################
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181
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182 class DefaultErrorCreator(object):
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183 insert_before = True
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184 block_inside = True
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185 error_container_tag = 'div'
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186 error_message_class = 'error-message'
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187 error_block_class = 'error-block'
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188 default_message = "Invalid"
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189
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190 def __init__(self, **kw):
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191 for name, value in kw.items():
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192 if not hasattr(self, name):
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193 raise TypeError(
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194 "Unexpected keyword argument: %s" % name)
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195 setattr(self, name, value)
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196
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197 def __call__(self, el, is_block, message):
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198 error_el = el.makeelement(self.error_container_tag)
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199 if self.error_message_class:
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200 error_el.set('class', self.error_message_class)
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201 if is_block and self.error_block_class:
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202 error_el.set('class', error_el.get('class', '')+' '+self.error_block_class)
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203 if message is None or message == '':
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204 message = self.default_message
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205 if isinstance(message, ElementBase):
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206 error_el.append(message)
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207 else:
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208 assert isinstance(message, basestring), (
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209 "Bad message; should be a string or element: %r" % message)
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210 error_el.text = message or self.default_message
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211 if is_block and self.block_inside:
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212 if self.insert_before:
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213 error_el.tail = el.text
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214 el.text = None
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215 el.insert(0, error_el)
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216 else:
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217 el.append(error_el)
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218 else:
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219 parent = el.getparent()
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220 pos = parent.index(el)
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221 if self.insert_before:
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222 parent.insert(pos, error_el)
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223 else:
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224 error_el.tail = el.tail
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225 el.tail = None
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226 parent.insert(pos+1, error_el)
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227
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228 default_error_creator = DefaultErrorCreator()
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229
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230
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231 def insert_errors(
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232 el,
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233 errors,
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234 form_id=None,
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235 form_index=None,
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236 error_class="error",
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237 error_creator=default_error_creator,
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238 ):
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239 el = _find_form(el, form_id=form_id, form_index=form_index)
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240 for name, error in errors.items():
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241 if error is None:
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242 continue
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243 for error_el, message in _find_elements_for_name(el, name, error):
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244 assert isinstance(message, (basestring, type(None), ElementBase)), (
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245 "Bad message: %r" % message)
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246 _insert_error(error_el, message, error_class, error_creator)
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247
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248 def insert_errors_html(html, values, **kw):
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249 result_type = type(html)
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250 if isinstance(html, basestring):
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251 doc = fromstring(html)
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252 else:
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253 doc = copy.deepcopy(html)
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254 insert_errors(doc, values, **kw)
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255 return _transform_result(result_type, doc)
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256
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257 def _insert_error(el, error, error_class, error_creator):
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258 if _nons(el.tag) in defs.empty_tags or _nons(el.tag) == 'textarea':
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259 is_block = False
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260 else:
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261 is_block = True
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262 if _nons(el.tag) != 'form' and error_class:
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263 _add_class(el, error_class)
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264 if el.get('id'):
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265 labels = _label_for_xpath(el, for_id=el.get('id'))
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266 if labels:
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267 for label in labels:
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268 _add_class(label, error_class)
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269 error_creator(el, is_block, error)
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270
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271 def _add_class(el, class_name):
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272 if el.get('class'):
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273 el.set('class', el.get('class')+' '+class_name)
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274 else:
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275 el.set('class', class_name)
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276
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277 def _find_elements_for_name(form, name, error):
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278 if name is None:
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279 # An error for the entire form
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280 yield form, error
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281 return
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282 if name.startswith('#'):
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283 # By id
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284 el = form.get_element_by_id(name[1:])
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285 if el is not None:
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286 yield el, error
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287 return
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288 els = _name_xpath(form, name=name)
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289 if not els:
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290 # FIXME: should this raise an exception?
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291 return
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292 if not isinstance(error, (list, tuple)):
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293 yield els[0], error
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294 return
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295 # FIXME: if error is longer than els, should it raise an error?
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296 for el, err in zip(els, error):
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297 if err is None:
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298 continue
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299 yield el, err