Mercurial > piecrust2

annotate piecrust/data/debug.py @ 12:30a42341cfa8

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Define page slugs properly, avoid recursions with debug data.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 18 Aug 2014 16:49:54 -0700
parents 343d08ef5668
children 395eb38f2dfb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
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1 import re
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2 import cgi
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3 import logging
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4 import io
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5 from piecrust import APP_VERSION, PIECRUST_URL
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6 import collections
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7
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8
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9 logger = logging.getLogger(__name__)
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10
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11
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12 css_id_re = re.compile(r'[^\w\d\-]+')
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13
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14
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15 # CSS for the debug window.
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16 CSS_DEBUGINFO = """
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17 text-align: left;
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18 font-style: normal;
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19 padding: 1em;
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20 background: #a42;
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21 color: #fff;
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22 position: fixed;
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23 width: 50%;
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24 bottom: 0;
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25 right: 0;
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26 overflow: auto;
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27 max-height: 50%;
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28 box-shadow: 0 0 10px #633;
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29 """
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30
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31 # HTML elements.
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32 CSS_P = 'margin: 0; padding: 0;'
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33 CSS_A = 'color: #fff; text-decoration: none;'
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34
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35 # Headers.
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36 CSS_BIGHEADER = 'margin: 0.5em 0; font-weight: bold;'
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37 CSS_HEADER = 'margin: 0.5em 0; font-weight: bold;'
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38
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39 # Data block elements.
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40 CSS_DATA = 'font-family: Courier, sans-serif; font-size: 0.9em;'
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41 CSS_DATABLOCK = 'margin-left: 2em;'
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42 CSS_VALUE = 'color: #fca;'
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43 CSS_DOC = 'color: #fa8; font-size: 0.9em;'
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44
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45 # 'Baked with PieCrust' text
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46 BRANDING_TEXT = 'Baked with <em><a href="%s">PieCrust</a> %s</em>.' % (
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47 PIECRUST_URL, APP_VERSION)
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48
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49
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50 def build_debug_info(page, data):
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51 """ Generates HTML debug info for the given page's data.
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52 """
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53 output = io.StringIO()
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54 try:
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55 _do_build_debug_info(page, data, output)
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56 return output.getvalue()
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57 finally:
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58 output.close()
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59
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60
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61 def _do_build_debug_info(page, data, output):
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62 app = page.app
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63 exec_info = app.env.exec_info_stack.current_page_info
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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 exec_info:
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73 if exec_info.was_cache_valid:
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74 output.write('baked this morning')
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75 else:
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76 output.write('baked just now')
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77
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78 if app.cache.enabled:
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79 if app.env.was_cache_cleaned:
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80 output.write(', from a brand new cache')
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81 else:
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82 output.write(', from a valid cache')
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83 else:
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84 output.write(', with no cache')
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85
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86 else:
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87 output.write('no caching information available')
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88
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89 output.write(', ')
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90 if app.env.start_time != 0:
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91 output.write('in __PIECRUST_TIMING_INFORMATION__')
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92 else:
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93 output.write('no timing information available')
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94
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95 print('</p>', file=output)
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96 print('</div>', file=output)
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97
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98 if data:
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99 print('<div>', file=output)
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100 print(('<p style="%s cursor: pointer;" onclick="var l = '
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101 'document.getElementById(\'piecrust-debug-details\'); '
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102 'if (l.style.display == \'none\') l.style.display = '
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103 '\'block\'; else l.style.display = \'none\';">' % CSS_P), file=output)
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104 print(('<span style="%s">Template engine data</span> '
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105 '&mdash; click to toggle</a>.</p>' % CSS_BIGHEADER), file=output)
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106
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107 print('<div id="piecrust-debug-details" style="display: none;">', file=output)
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108 print(('<p style="%s">The following key/value pairs are '
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109 'available in the layout\'s markup, and most are '
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110 'available in the page\'s markup.</p>' % CSS_DOC), file=output)
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111
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112 filtered_data = dict(data)
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113 for k in list(filtered_data.keys()):
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114 if k.startswith('__'):
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115 del filtered_data[k]
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116
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117 renderer = DebugDataRenderer(output)
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118 renderer.external_docs['data-site'] = (
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119 "This section comes from the site configuration file.")
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120 renderer.external_docs['data-page'] = (
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121 "This section comes from the page's configuration header.")
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122 renderer.renderData(filtered_data)
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123
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124 print('</div>', file=output)
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125 print('</div>', file=output)
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126
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127 print('</div>', file=output)
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128
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129
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130 class DebugDataRenderer(object):
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131 MAX_VALUE_LENGTH = 150
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132
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133 def __init__(self, output):
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134 self.indent = 0
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135 self.output = output
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136 self.external_docs = {}
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137
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138 def renderData(self, data):
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139 if not isinstance(data, dict):
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140 raise Exception("Expected top level data to be a dict.")
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141 self._writeLine('<div style="%s">' % CSS_DATA)
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142 self._renderDict(data, 'data')
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143 self._writeLine('</div>')
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144
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145 def _renderValue(self, data, path):
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146 if data is None:
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147 self._write('&lt;null&gt;')
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148 return
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149
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150 if isinstance(data, dict):
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151 self._renderCollapsableValueStart(path)
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152 with IndentScope(self):
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153 self._renderDict(data, path)
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154 self._renderCollapsableValueEnd()
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155 return
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156
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157 if isinstance(data, list):
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158 self._renderCollapsableValueStart(path)
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159 with IndentScope(self):
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160 self._renderList(data, path)
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161 self._renderCollapsableValueEnd()
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162 return
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163
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164 data_type = type(data)
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165 if data_type is bool:
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166 self._write('<span style="%s">%s</span>' % (CSS_VALUE,
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167 'true' if bool(data) else 'false'))
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168 return
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169
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170 if data_type is int:
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171 self._write('<span style="%s">%d</span>' % (CSS_VALUE, data))
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172 return
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173
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174 if data_type is float:
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175 self._write('<span style="%s">%4.2f</span>' % (CSS_VALUE, data))
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176 return
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177
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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178 if data_type is str:
3
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179 if len(data) > DebugDataRenderer.MAX_VALUE_LENGTH:
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180 data = data[:DebugDataRenderer.MAX_VALUE_LENGTH - 5]
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181 data += '[...]'
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182 data = cgi.escape(data).encode('ascii', 'xmlcharrefreplace')
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183 self._write('<span style="%s">%s</span>' % (CSS_VALUE, data))
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184 return
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diff changeset
185
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186 self._renderCollapsableValueStart(path)
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187 with IndentScope(self):
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188 self._renderObject(data, path)
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189 self._renderCollapsableValueEnd()
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190
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191 def _renderList(self, data, path):
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192 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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193 self._renderDoc(data, path)
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194 self._renderAttributes(data, path)
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195 rendered_count = self._renderIterable(data, path, lambda d: enumerate(d))
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196 if rendered_count == 0:
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197 self._writeLine('<p style="%s %s">(empty array)</p>' % (CSS_P, CSS_DOC))
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198 self._writeLine('</div>')
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199
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200 def _renderDict(self, data, path):
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201 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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202 self._renderDoc(data, path)
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203 self._renderAttributes(data, path)
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204 rendered_count = self._renderIterable(data, path,
5
474c9882decf Upgrade to Python 3.
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parents: 3
diff changeset
205 lambda d: sorted(iter(d.items()), key=lambda i: i[0]))
3
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206 if rendered_count == 0:
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207 self._writeLine('<p style="%s %s">(empty dictionary)</p>' % (CSS_P, CSS_DOC))
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208 self._writeLine('</div>')
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209
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210 def _renderObject(self, data, path):
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211 if hasattr(data.__class__, 'debug_render_func'):
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diff changeset
212 # This object wants to be rendered as a simple string...
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diff changeset
213 render_func_name = data.__class__.debug_render_func
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diff changeset
214 render_func = getattr(data, render_func_name)
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diff changeset
215 value = render_func()
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diff changeset
216 self._renderValue(value, path)
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diff changeset
217 return
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diff changeset
218
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219 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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diff changeset
220 self._renderDoc(data, path)
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diff changeset
221 rendered_attrs = self._renderAttributes(data, path)
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diff changeset
222
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
223 if (hasattr(data, '__iter__') and
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diff changeset
224 hasattr(data.__class__, 'debug_render_items') and
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diff changeset
225 data.__class__.debug_render_items):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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226 rendered_count = self._renderIterable(data, path,
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
227 lambda d: enumerate(d))
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diff changeset
228 if rendered_count == 0:
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229 self._writeLine('<p style="%s %s">(empty)</p>' % (CSS_P, CSS_DOC))
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230
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231 elif rendered_attrs == 0:
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232 self._writeLine('<p style="%s %s">(empty)</p>' % (CSS_P, CSS_DOC))
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diff changeset
233
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diff changeset
234 self._writeLine('</div>')
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diff changeset
235
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
236 def _renderIterable(self, data, path, iter_func):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
237 rendered_count = 0
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diff changeset
238 with IndentScope(self):
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diff changeset
239 for i, item in iter_func(data):
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diff changeset
240 self._writeStart('<div>%s' % i)
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diff changeset
241 if item is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
242 self._write(' : ')
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diff changeset
243 self._renderValue(item, self._makePath(path, i))
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diff changeset
244 self._writeEnd('</div>')
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diff changeset
245 rendered_count += 1
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diff changeset
246 return rendered_count
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diff changeset
247
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
248 def _renderDoc(self, data, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
249 if hasattr(data.__class__, 'debug_render_doc'):
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diff changeset
250 self._writeLine('<span style="%s">&ndash; %s</span>' %
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diff changeset
251 (CSS_DOC, data.__class__.debug_render_doc))
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diff changeset
252
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
253 doc = self.external_docs.get(path)
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diff changeset
254 if doc is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
255 self._writeLine('<span style="%s">&ndash; %s</span>' %
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diff changeset
256 (CSS_DOC, doc))
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diff changeset
257
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
258 def _renderAttributes(self, data, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
259 if not hasattr(data.__class__, 'debug_render'):
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diff changeset
260 return 0
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parents:
diff changeset
261
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
262 attr_names = list(data.__class__.debug_render)
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parents:
diff changeset
263 if hasattr(data.__class__, 'debug_render_dynamic'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
264 drd = data.__class__.debug_render_dynamic
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diff changeset
265 for ng in drd:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
266 name_gen = getattr(data, ng)
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diff changeset
267 attr_names += name_gen()
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268
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269 invoke_attrs = []
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270 if hasattr(data.__class__, 'debug_render_invoke'):
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271 invoke_attrs = list(data.__class__.debug_render_invoke)
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272 if hasattr(data.__class__, 'debug_render_invoke_dynamic'):
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273 drid = data.__class__.debug_render_invoke_dynamic
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274 for ng in drid:
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275 name_gen = getattr(data, ng)
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276 invoke_attrs += name_gen()
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277
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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 try:
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285 attr = getattr(data.__class__, name)
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286 except AttributeError:
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287 # This could be an attribute on the instance itself, or some
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288 # dynamic attribute.
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289 attr = getattr(data, name)
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290
5
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291 if isinstance(attr, collections.Callable):
3
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292 attr_func = getattr(data, name)
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293 argcount = attr_func.__code__.co_argcount
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294 var_names = attr_func.__code__.co_varnames
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295 if argcount == 1 and should_call:
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296 render_name += '()'
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297 value = attr_func()
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298 else:
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299 if should_call:
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300 logger.warning("Method '%s' should be invoked for "
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301 "rendering, but it has %s arguments." %
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302 (name, argcount))
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303 should_call = False
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304 render_name += '(%s)' % ','.join(var_names[1:])
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305 elif should_call:
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306 value = getattr(data, name)
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307
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308 self._writeLine('<div>%s' % render_name)
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309 with IndentScope(self):
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310 if should_call:
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311 self._write(' : ')
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312 self._renderValue(value, self._makePath(path, name))
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313 self._writeLine('</div>')
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314 rendered_count += 1
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315
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316 return rendered_count
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317
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318 def _renderCollapsableValueStart(self, path):
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319 self._writeLine('<span style="cursor: pointer;" onclick="var l = '
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320 'document.getElementById(\'piecrust-debug-data-%s\'); '
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321 'if (l.style.display == \'none\') {'
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322 ' l.style.display = \'block\';'
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323 ' this.innerHTML = \'[-]\';'
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324 '} else {'
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325 ' l.style.display = \'none\';'
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326 ' this.innerHTML = \'[+]\';'
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327 '}">'
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328 '[+]'
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329 '</span>' %
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330 path)
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331 self._writeLine('<div style="display: none"'
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332 'id="piecrust-debug-data-%s">' % path)
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333
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334 def _renderCollapsableValueEnd(self):
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335 self._writeLine('</div>')
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336
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337 def _makePath(self, parent_path, key):
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338 return '%s-%s' % (parent_path, css_id_re.sub('-', str(key)))
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339
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340 def _writeLine(self, msg):
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341 self.output.write(self.indent * ' ')
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342 self.output.write(msg)
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343 self.output.write('\n')
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344
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345 def _writeStart(self, msg=None):
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346 self.output.write(self.indent * ' ')
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347 if msg is not None:
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348 self.output.write(msg)
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349
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350 def _write(self, msg):
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351 self.output.write(msg)
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352
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353 def _writeEnd(self, msg=None):
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354 if msg is not None:
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355 self.output.write(msg)
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356 self.output.write('\n')
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357
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358
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359 class IndentScope(object):
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360 def __init__(self, target):
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361 self.target = target
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362
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363 def __enter__(self):
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364 self.target.indent += 1
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365 return self
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366
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367 def __exit__(self, exc_type, exc_val, exc_tb):
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368 self.target.indent -= 1
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369