Mercurial > piecrust2

annotate piecrust/data/debug.py @ 179:acc718ab56da 2.0.0a5

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setup: Make version generation compatible with PEP440.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 03 Jan 2015 23:13:06 -0800
parents 0445a2232de7
children d7a548ebcd58
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 import re
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395eb38f2dfb Properly escape HTML characters in the debug info, add more options.
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2 import io
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3 import html
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4 import logging
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5 import collections
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6 from piecrust import APP_VERSION, PIECRUST_URL
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7 from piecrust.page import FLAG_RAW_CACHE_VALID
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8
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9
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10 logger = logging.getLogger(__name__)
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11
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12
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13 css_id_re = re.compile(r'[^\w\d\-]+')
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14
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15
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16 # CSS for the debug window.
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17 CSS_DEBUGINFO = """
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18 text-align: left;
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19 font-style: normal;
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20 padding: 1em;
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21 background: #a42;
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22 color: #fff;
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23 position: fixed;
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24 width: 50%;
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25 bottom: 0;
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26 right: 0;
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27 overflow: auto;
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28 max-height: 50%;
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29 box-shadow: 0 0 10px #633;
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30 """
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31
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32 # HTML elements.
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33 CSS_P = 'margin: 0; padding: 0;'
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34 CSS_A = 'color: #fff; text-decoration: none;'
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35
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36 # Headers.
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37 CSS_BIGHEADER = 'margin: 0.5em 0; font-weight: bold;'
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38 CSS_HEADER = 'margin: 0.5em 0; font-weight: bold;'
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39
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40 # Data block elements.
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41 CSS_DATA = 'font-family: Courier, sans-serif; font-size: 0.9em;'
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42 CSS_DATABLOCK = 'margin-left: 2em;'
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43 CSS_VALUE = 'color: #fca;'
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44 CSS_DOC = 'color: #fa8; font-size: 0.9em;'
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45
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46 # 'Baked with PieCrust' text
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47 BRANDING_TEXT = 'Baked with <em><a href="%s">PieCrust</a> %s</em>.' % (
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48 PIECRUST_URL, APP_VERSION)
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49
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50
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51 def build_debug_info(page, data):
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52 """ Generates HTML debug info for the given page's data.
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53 """
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54 output = io.StringIO()
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55 try:
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56 _do_build_debug_info(page, data, output)
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57 return output.getvalue()
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58 finally:
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59 output.close()
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60
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61
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62 def _do_build_debug_info(page, data, output):
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63 app = page.app
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64
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65 print('<div id="piecrust-debug-info" style="%s">' % CSS_DEBUGINFO, file=output)
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66
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67 print('<div>', file=output)
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68 print('<p style="%s"><strong>PieCrust %s</strong> &mdash; ' % (CSS_P, APP_VERSION), file=output)
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69
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70 # If we have some execution info in the environment,
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71 # add more information.
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72 if page.flags & FLAG_RAW_CACHE_VALID:
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73 output.write('baked this morning')
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74 else:
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75 output.write('baked just now')
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76
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77 if app.cache.enabled:
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78 if app.env.was_cache_cleaned:
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79 output.write(', from a brand new cache')
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80 else:
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81 output.write(', from a valid cache')
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82 else:
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83 output.write(', with no cache')
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84
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85 output.write(', ')
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86 if app.env.start_time != 0:
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87 output.write('in __PIECRUST_TIMING_INFORMATION__')
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88 else:
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89 output.write('no timing information available')
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90
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91 print('</p>', file=output)
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92 print('</div>', file=output)
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93
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94 if data:
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95 print('<div>', file=output)
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96 print(('<p style="%s cursor: pointer;" onclick="var l = '
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97 'document.getElementById(\'piecrust-debug-details\'); '
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98 'if (l.style.display == \'none\') l.style.display = '
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99 '\'block\'; else l.style.display = \'none\';">' % CSS_P), file=output)
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100 print(('<span style="%s">Template engine data</span> '
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101 '&mdash; click to toggle</a>.</p>' % CSS_BIGHEADER), file=output)
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102
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103 print('<div id="piecrust-debug-details" style="display: none;">', file=output)
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104 print(('<p style="%s">The following key/value pairs are '
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105 'available in the layout\'s markup, and most are '
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106 'available in the page\'s markup.</p>' % CSS_DOC), file=output)
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107
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108 filtered_data = dict(data)
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109 for k in list(filtered_data.keys()):
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110 if k.startswith('__'):
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111 del filtered_data[k]
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112
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113 renderer = DebugDataRenderer(output)
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114 renderer.external_docs['data-site'] = (
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115 "This section comes from the site configuration file.")
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116 renderer.external_docs['data-page'] = (
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117 "This section comes from the page's configuration header.")
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118 renderer.renderData(filtered_data)
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119
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120 print('</div>', file=output)
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121 print('</div>', file=output)
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122
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123 print('</div>', file=output)
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124
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125
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126 class DebugDataRenderer(object):
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127 MAX_VALUE_LENGTH = 150
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128
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129 def __init__(self, output):
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130 self.indent = 0
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131 self.output = output
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132 self.external_docs = {}
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133
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134 def renderData(self, data):
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135 if not isinstance(data, dict):
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136 raise Exception("Expected top level data to be a dict.")
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137 self._writeLine('<div style="%s">' % CSS_DATA)
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138 self._renderDict(data, 'data')
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139 self._writeLine('</div>')
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140
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141 def _renderValue(self, data, path):
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142 if data is None:
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143 self._write('&lt;null&gt;')
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144 return
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145
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146 if isinstance(data, dict):
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147 self._renderCollapsableValueStart(path)
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148 with IndentScope(self):
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149 self._renderDict(data, path)
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150 self._renderCollapsableValueEnd()
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151 return
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152
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153 if isinstance(data, list):
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154 self._renderCollapsableValueStart(path)
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155 with IndentScope(self):
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156 self._renderList(data, path)
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157 self._renderCollapsableValueEnd()
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158 return
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159
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160 data_type = type(data)
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161 if data_type is bool:
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162 self._write('<span style="%s">%s</span>' % (CSS_VALUE,
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163 'true' if bool(data) else 'false'))
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164 return
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165
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166 if data_type is int:
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167 self._write('<span style="%s">%d</span>' % (CSS_VALUE, data))
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168 return
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169
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170 if data_type is float:
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171 self._write('<span style="%s">%4.2f</span>' % (CSS_VALUE, data))
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172 return
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173
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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parents: 5
diff changeset
174 if data_type is str:
3
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175 if len(data) > DebugDataRenderer.MAX_VALUE_LENGTH:
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176 data = data[:DebugDataRenderer.MAX_VALUE_LENGTH - 5]
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177 data += '[...]'
14
395eb38f2dfb Properly escape HTML characters in the debug info, add more options.
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diff changeset
178 data = html.escape(data)
3
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179 self._write('<span style="%s">%s</span>' % (CSS_VALUE, data))
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180 return
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diff changeset
181
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182 self._renderCollapsableValueStart(path)
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diff changeset
183 with IndentScope(self):
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184 self._renderObject(data, path)
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185 self._renderCollapsableValueEnd()
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186
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187 def _renderList(self, data, path):
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188 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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189 self._renderDoc(data, path)
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190 self._renderAttributes(data, path)
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diff changeset
191 rendered_count = self._renderIterable(data, path, lambda d: enumerate(d))
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192 if rendered_count == 0:
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193 self._writeLine('<p style="%s %s">(empty array)</p>' % (CSS_P, CSS_DOC))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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194 self._writeLine('</div>')
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195
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196 def _renderDict(self, data, path):
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197 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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diff changeset
198 self._renderDoc(data, path)
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diff changeset
199 self._renderAttributes(data, path)
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200 rendered_count = self._renderIterable(data, path,
5
474c9882decf Upgrade to Python 3.
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parents: 3
diff changeset
201 lambda d: sorted(iter(d.items()), key=lambda i: i[0]))
3
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202 if rendered_count == 0:
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203 self._writeLine('<p style="%s %s">(empty dictionary)</p>' % (CSS_P, CSS_DOC))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
204 self._writeLine('</div>')
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diff changeset
205
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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206 def _renderObject(self, data, path):
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diff changeset
207 if hasattr(data.__class__, 'debug_render_func'):
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208 # This object wants to be rendered as a simple string...
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diff changeset
209 render_func_name = data.__class__.debug_render_func
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210 render_func = getattr(data, render_func_name)
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diff changeset
211 value = render_func()
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diff changeset
212 self._renderValue(value, path)
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diff changeset
213 return
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
214
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
215 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
216 self._renderDoc(data, path)
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diff changeset
217 rendered_attrs = self._renderAttributes(data, path)
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diff changeset
218
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
219 if (hasattr(data, '__iter__') and
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
220 hasattr(data.__class__, 'debug_render_items') and
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
221 data.__class__.debug_render_items):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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222 rendered_count = self._renderIterable(data, path,
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
223 lambda d: enumerate(d))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
224 if rendered_count == 0:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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225 self._writeLine('<p style="%s %s">(empty)</p>' % (CSS_P, CSS_DOC))
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diff changeset
226
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diff changeset
227 elif rendered_attrs == 0:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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228 self._writeLine('<p style="%s %s">(empty)</p>' % (CSS_P, CSS_DOC))
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diff changeset
229
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
230 self._writeLine('</div>')
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diff changeset
231
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
232 def _renderIterable(self, data, path, iter_func):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
233 rendered_count = 0
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diff changeset
234 with IndentScope(self):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
235 for i, item in iter_func(data):
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diff changeset
236 self._writeStart('<div>%s' % i)
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diff changeset
237 if item is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
238 self._write(' : ')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
239 self._renderValue(item, self._makePath(path, i))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
240 self._writeEnd('</div>')
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diff changeset
241 rendered_count += 1
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
242 return rendered_count
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diff changeset
243
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
244 def _renderDoc(self, data, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
245 if hasattr(data.__class__, 'debug_render_doc'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
246 self._writeLine('<span style="%s">&ndash; %s</span>' %
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diff changeset
247 (CSS_DOC, data.__class__.debug_render_doc))
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diff changeset
248
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diff changeset
249 doc = self.external_docs.get(path)
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diff changeset
250 if doc is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
251 self._writeLine('<span style="%s">&ndash; %s</span>' %
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diff changeset
252 (CSS_DOC, doc))
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diff changeset
253
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
254 def _renderAttributes(self, data, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
255 if not hasattr(data.__class__, 'debug_render'):
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diff changeset
256 return 0
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parents:
diff changeset
257
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
258 attr_names = list(data.__class__.debug_render)
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diff changeset
259 if hasattr(data.__class__, 'debug_render_dynamic'):
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diff changeset
260 drd = data.__class__.debug_render_dynamic
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diff changeset
261 for ng in drd:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
262 name_gen = getattr(data, ng)
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diff changeset
263 attr_names += name_gen()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
264
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
265 invoke_attrs = []
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diff changeset
266 if hasattr(data.__class__, 'debug_render_invoke'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
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267 invoke_attrs = list(data.__class__.debug_render_invoke)
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268 if hasattr(data.__class__, 'debug_render_invoke_dynamic'):
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269 drid = data.__class__.debug_render_invoke_dynamic
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270 for ng in drid:
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271 name_gen = getattr(data, ng)
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272 invoke_attrs += name_gen()
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273
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274 redirects = {}
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275 if hasattr(data.__class__, 'debug_render_redirect'):
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276 redirects = data.__class__.debug_render_redirect
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277
3
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278 rendered_count = 0
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279 for name in attr_names:
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280 value = None
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281 render_name = name
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282 should_call = name in invoke_attrs
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283
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284 if name in redirects:
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285 name = redirects[name]
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286
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287 query_instance = False
3
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288 try:
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289 attr = getattr(data.__class__, name)
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290 except AttributeError:
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291 # This could be an attribute on the instance itself, or some
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292 # dynamic attribute.
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293 query_instance = True
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294
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295 if query_instance:
3
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296 attr = getattr(data, name)
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297
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298 if isinstance(attr, collections.Callable):
3
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299 attr_func = getattr(data, name)
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300 argcount = attr_func.__code__.co_argcount
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301 var_names = attr_func.__code__.co_varnames
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302 if argcount == 1 and should_call:
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303 render_name += '()'
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304 value = attr_func()
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305 else:
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306 if should_call:
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307 logger.warning("Method '%s' should be invoked for "
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308 "rendering, but it has %s arguments." %
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309 (name, argcount))
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310 should_call = False
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311 render_name += '(%s)' % ','.join(var_names[1:])
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312 elif should_call:
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313 value = getattr(data, name)
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314
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315 self._writeLine('<div>%s' % render_name)
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316 with IndentScope(self):
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317 if should_call:
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318 self._write(' : ')
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319 self._renderValue(value, self._makePath(path, name))
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320 self._writeLine('</div>')
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321 rendered_count += 1
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322
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323 return rendered_count
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324
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325 def _renderCollapsableValueStart(self, path):
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326 self._writeLine('<span style="cursor: pointer;" onclick="var l = '
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327 'document.getElementById(\'piecrust-debug-data-%s\'); '
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328 'if (l.style.display == \'none\') {'
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329 ' l.style.display = \'block\';'
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330 ' this.innerHTML = \'[-]\';'
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331 '} else {'
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332 ' l.style.display = \'none\';'
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333 ' this.innerHTML = \'[+]\';'
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334 '}">'
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335 '[+]'
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336 '</span>' %
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337 path)
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338 self._writeLine('<div style="display: none"'
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339 'id="piecrust-debug-data-%s">' % path)
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340
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341 def _renderCollapsableValueEnd(self):
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342 self._writeLine('</div>')
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343
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344 def _makePath(self, parent_path, key):
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345 return '%s-%s' % (parent_path, css_id_re.sub('-', str(key)))
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346
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347 def _writeLine(self, msg):
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348 self.output.write(self.indent * ' ')
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349 self.output.write(msg)
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350 self.output.write('\n')
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351
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352 def _writeStart(self, msg=None):
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353 self.output.write(self.indent * ' ')
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354 if msg is not None:
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355 self.output.write(msg)
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356
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357 def _write(self, msg):
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358 self.output.write(msg)
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359
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360 def _writeEnd(self, msg=None):
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361 if msg is not None:
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362 self.output.write(msg)
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363 self.output.write('\n')
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364
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365
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366 class IndentScope(object):
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367 def __init__(self, target):
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368 self.target = target
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369
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370 def __enter__(self):
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371 self.target.indent += 1
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372 return self
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373
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374 def __exit__(self, exc_type, exc_val, exc_tb):
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375 self.target.indent -= 1
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376