Mercurial > piecrust2

annotate piecrust/data/debug.py @ 412:a1567766c83c

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internal: Allow re-registering performance timers.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 20 Jun 2015 19:15:57 -0700
parents bd56d9acd6ef
children 32c7c2d219d2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import re
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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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13 css_id_re = re.compile(r'[^\w\d\-]+')
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15
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16 # CSS for the debug window.
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17 CSS_DEBUGWINDOW = """
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18 text-align: left;
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19 font-family: serif;
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20 font-style: normal;
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21 font-weight: normal;
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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 CSS_PIPELINESTATUS = """
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32 background: #fff;
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33 color: #a22;
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34 """
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35
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36 CSS_DEBUGINFO = """
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37 padding: 1em;
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38 background: #a42;
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39 color: #fff;
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40 """
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41
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42 # HTML elements.
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43 CSS_P = 'margin: 0; padding: 0;'
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44 CSS_A = 'color: #fff; text-decoration: none;'
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45
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46 # Headers.
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47 CSS_BIGHEADER = 'margin: 0.5em 0; font-weight: bold;'
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48 CSS_HEADER = 'margin: 0.5em 0; font-weight: bold;'
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49
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50 # Data block elements.
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51 CSS_DATA = 'font-family: Courier, sans-serif; font-size: 0.9em;'
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52 CSS_DATABLOCK = 'margin-left: 2em;'
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53 CSS_VALUE = 'color: #fca;'
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54 CSS_DOC = 'color: #fa8; font-size: 0.9em;'
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55
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56 # 'Baked with PieCrust' text
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57 BRANDING_TEXT = 'Baked with <em><a href="%s">PieCrust</a> %s</em>.' % (
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58 PIECRUST_URL, APP_VERSION)
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59
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60
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61 def build_debug_info(page, data):
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62 """ Generates HTML debug info for the given page's data.
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63 """
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64 output = io.StringIO()
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65 try:
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66 _do_build_debug_info(page, data, output)
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67 return output.getvalue()
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68 finally:
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69 output.close()
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70
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71
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72 def _do_build_debug_info(page, data, output):
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73 app = page.app
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74
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75 print('<div id="piecrust-debug-info" style="%s">' % CSS_DEBUGWINDOW,
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76 file=output)
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77
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78 print('<div id="piecrust-debug-info-pipeline-status" style="%s">' %
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79 CSS_PIPELINESTATUS, file=output)
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80 print('</div>', file=output)
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81
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82 print('<div style="%s">' % CSS_DEBUGINFO, file=output)
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83 print('<p style="%s"><strong>PieCrust %s</strong> &mdash; ' %
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84 (CSS_P, APP_VERSION), file=output)
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85
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86 # If we have some execution info in the environment,
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87 # add more information.
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88 if page.flags & FLAG_RAW_CACHE_VALID:
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89 output.write('baked this morning')
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90 else:
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91 output.write('baked just now')
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92
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93 if app.cache.enabled:
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94 if app.env.was_cache_cleaned:
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95 output.write(', from a brand new cache')
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96 else:
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97 output.write(', from a valid cache')
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98 else:
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99 output.write(', with no cache')
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100
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101 output.write(', ')
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102 if app.env.start_time != 0:
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103 output.write('in __PIECRUST_TIMING_INFORMATION__')
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104 else:
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105 output.write('no timing information available')
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106
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107 print('</p>', file=output)
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108 print('</div>', file=output)
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109
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110 if data:
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111 print('<div style="%s padding-top: 0;">' % CSS_DEBUGINFO, file=output)
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112 print(('<p style="%s cursor: pointer;" onclick="var l = '
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113 'document.getElementById(\'piecrust-debug-details\'); '
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114 'if (l.style.display == \'none\') l.style.display = '
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115 '\'block\'; else l.style.display = \'none\';">' % CSS_P), file=output)
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116 print(('<span style="%s">Template engine data</span> '
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117 '&mdash; click to toggle</a>.</p>' % CSS_BIGHEADER), file=output)
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118
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119 print('<div id="piecrust-debug-details" style="display: none;">', file=output)
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120 print(('<p style="%s">The following key/value pairs are '
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121 'available in the layout\'s markup, and most are '
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122 'available in the page\'s markup.</p>' % CSS_DOC), file=output)
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123
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124 filtered_data = dict(data)
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125 for k in list(filtered_data.keys()):
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126 if k.startswith('__'):
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127 del filtered_data[k]
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128
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129 renderer = DebugDataRenderer(output)
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130 renderer.external_docs['data-site'] = (
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131 "This section comes from the site configuration file.")
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132 renderer.external_docs['data-page'] = (
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133 "This section comes from the page's configuration header.")
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134 renderer.renderData(filtered_data)
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135
5
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136 print('</div>', file=output)
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137 print('</div>', file=output)
3
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138
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139 print('</div>', file=output)
3
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140
219
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141 print('<script src="/__piecrust_static/piecrust-debug-info.js"></script>',
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diff changeset
142 file=output)
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143
3
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144
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145 class DebugDataRenderer(object):
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146 MAX_VALUE_LENGTH = 150
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147
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148 def __init__(self, output):
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149 self.indent = 0
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150 self.output = output
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151 self.external_docs = {}
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152
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153 def renderData(self, data):
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154 if not isinstance(data, dict):
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155 raise Exception("Expected top level data to be a dict.")
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156 self._writeLine('<div style="%s">' % CSS_DATA)
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157 self._renderDict(data, 'data')
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158 self._writeLine('</div>')
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159
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160 def _renderValue(self, data, path):
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161 if data is None:
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162 self._write('&lt;null&gt;')
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163 return
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164
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165 if isinstance(data, dict):
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166 self._renderCollapsableValueStart(path)
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167 with IndentScope(self):
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168 self._renderDict(data, path)
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169 self._renderCollapsableValueEnd()
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170 return
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171
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172 if isinstance(data, list):
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173 self._renderCollapsableValueStart(path)
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174 with IndentScope(self):
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175 self._renderList(data, path)
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176 self._renderCollapsableValueEnd()
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177 return
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178
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179 data_type = type(data)
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180 if data_type is bool:
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181 self._write('<span style="%s">%s</span>' % (CSS_VALUE,
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182 'true' if bool(data) else 'false'))
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183 return
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184
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185 if data_type is int:
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186 self._write('<span style="%s">%d</span>' % (CSS_VALUE, data))
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187 return
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188
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189 if data_type is float:
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190 self._write('<span style="%s">%4.2f</span>' % (CSS_VALUE, data))
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191 return
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192
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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193 if data_type is str:
3
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194 if len(data) > DebugDataRenderer.MAX_VALUE_LENGTH:
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195 data = data[:DebugDataRenderer.MAX_VALUE_LENGTH - 5]
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196 data += '[...]'
14
395eb38f2dfb Properly escape HTML characters in the debug info, add more options.
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197 data = html.escape(data)
3
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198 self._write('<span style="%s">%s</span>' % (CSS_VALUE, data))
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199 return
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200
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201 self._renderCollapsableValueStart(path)
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202 with IndentScope(self):
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203 self._renderObject(data, path)
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204 self._renderCollapsableValueEnd()
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205
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206 def _renderList(self, data, path):
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207 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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208 self._renderDoc(data, path)
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209 self._renderAttributes(data, path)
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210 rendered_count = self._renderIterable(data, path, lambda d: enumerate(d))
407
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diff changeset
211 if (rendered_count == 0 and
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diff changeset
212 not hasattr(data.__class__, 'debug_render_not_empty')):
3
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213 self._writeLine('<p style="%s %s">(empty array)</p>' % (CSS_P, CSS_DOC))
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214 self._writeLine('</div>')
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215
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216 def _renderDict(self, data, path):
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217 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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218 self._renderDoc(data, path)
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219 self._renderAttributes(data, path)
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220 rendered_count = self._renderIterable(data, path,
5
474c9882decf Upgrade to Python 3.
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diff changeset
221 lambda d: sorted(iter(d.items()), key=lambda i: i[0]))
407
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diff changeset
222 if (rendered_count == 0 and
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diff changeset
223 not hasattr(data.__class__, 'debug_render_not_empty')):
3
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224 self._writeLine('<p style="%s %s">(empty dictionary)</p>' % (CSS_P, CSS_DOC))
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225 self._writeLine('</div>')
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226
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227 def _renderObject(self, data, path):
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228 if hasattr(data.__class__, 'debug_render_func'):
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229 # This object wants to be rendered as a simple string...
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230 render_func_name = data.__class__.debug_render_func
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231 render_func = getattr(data, render_func_name)
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232 value = render_func()
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233 self._renderValue(value, path)
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234 return
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235
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236 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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237 self._renderDoc(data, path)
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238 rendered_attrs = self._renderAttributes(data, path)
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239
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240 if (hasattr(data, '__iter__') and
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241 hasattr(data.__class__, 'debug_render_items') and
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242 data.__class__.debug_render_items):
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243 rendered_count = self._renderIterable(data, path,
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244 lambda d: enumerate(d))
407
bd56d9acd6ef debug: Add support for more attributes for the debug info.
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diff changeset
245 if (rendered_count == 0 and
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diff changeset
246 not hasattr(data.__class__, 'debug_render_not_empty')):
3
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247 self._writeLine('<p style="%s %s">(empty)</p>' % (CSS_P, CSS_DOC))
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248
407
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diff changeset
249 elif (rendered_attrs == 0 and
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diff changeset
250 not hasattr(data.__class__, 'debug_render_not_empty')):
3
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251 self._writeLine('<p style="%s %s">(empty)</p>' % (CSS_P, CSS_DOC))
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252
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253 self._writeLine('</div>')
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254
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255 def _renderIterable(self, data, path, iter_func):
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256 rendered_count = 0
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257 with IndentScope(self):
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258 for i, item in iter_func(data):
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259 self._writeStart('<div>%s' % i)
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260 if item is not None:
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diff changeset
261 self._write(' : ')
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262 self._renderValue(item, self._makePath(path, i))
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diff changeset
263 self._writeEnd('</div>')
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diff changeset
264 rendered_count += 1
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diff changeset
265 return rendered_count
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diff changeset
266
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267 def _renderDoc(self, data, path):
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268 if hasattr(data.__class__, 'debug_render_doc'):
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269 self._writeLine('<span style="%s">&ndash; %s</span>' %
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270 (CSS_DOC, data.__class__.debug_render_doc))
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271
407
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diff changeset
272 if hasattr(data.__class__, 'debug_render_doc_dynamic'):
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diff changeset
273 drdd = data.__class__.debug_render_doc_dynamic
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diff changeset
274 for ng in drdd:
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diff changeset
275 doc = getattr(data, ng)
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276 self._writeLine('<span style="%s">&ndash; %s</span>' %
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diff changeset
277 (CSS_DOC, doc()))
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diff changeset
278
3
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279 doc = self.external_docs.get(path)
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280 if doc is not None:
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281 self._writeLine('<span style="%s">&ndash; %s</span>' %
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282 (CSS_DOC, doc))
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283
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284 def _renderAttributes(self, data, path):
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285 if not hasattr(data.__class__, 'debug_render'):
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286 return 0
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287
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288 attr_names = list(data.__class__.debug_render)
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289 if hasattr(data.__class__, 'debug_render_dynamic'):
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290 drd = data.__class__.debug_render_dynamic
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291 for ng in drd:
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292 name_gen = getattr(data, ng)
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293 attr_names += name_gen()
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294
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295 invoke_attrs = []
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296 if hasattr(data.__class__, 'debug_render_invoke'):
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297 invoke_attrs = list(data.__class__.debug_render_invoke)
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298 if hasattr(data.__class__, 'debug_render_invoke_dynamic'):
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299 drid = data.__class__.debug_render_invoke_dynamic
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300 for ng in drid:
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301 name_gen = getattr(data, ng)
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302 invoke_attrs += name_gen()
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303
14
395eb38f2dfb Properly escape HTML characters in the debug info, add more options.
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304 redirects = {}
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diff changeset
305 if hasattr(data.__class__, 'debug_render_redirect'):
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306 redirects = data.__class__.debug_render_redirect
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diff changeset
307
3
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diff changeset
308 rendered_count = 0
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diff changeset
309 for name in attr_names:
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diff changeset
310 value = None
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311 render_name = name
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diff changeset
312 should_call = name in invoke_attrs
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diff changeset
313
14
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diff changeset
314 if name in redirects:
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diff changeset
315 name = redirects[name]
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diff changeset
316
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diff changeset
317 query_instance = False
3
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318 try:
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319 attr = getattr(data.__class__, name)
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320 except AttributeError:
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321 # This could be an attribute on the instance itself, or some
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322 # dynamic attribute.
14
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diff changeset
323 query_instance = True
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diff changeset
324
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diff changeset
325 if query_instance:
3
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diff changeset
326 attr = getattr(data, name)
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diff changeset
327
5
474c9882decf Upgrade to Python 3.
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diff changeset
328 if isinstance(attr, collections.Callable):
3
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329 attr_func = getattr(data, name)
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330 argcount = attr_func.__code__.co_argcount
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diff changeset
331 var_names = attr_func.__code__.co_varnames
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diff changeset
332 if argcount == 1 and should_call:
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diff changeset
333 render_name += '()'
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diff changeset
334 value = attr_func()
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diff changeset
335 else:
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diff changeset
336 if should_call:
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diff changeset
337 logger.warning("Method '%s' should be invoked for "
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
338 "rendering, but it has %s arguments." %
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diff changeset
339 (name, argcount))
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340 should_call = False
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341 render_name += '(%s)' % ','.join(var_names[1:])
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diff changeset
342 elif should_call:
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diff changeset
343 value = getattr(data, name)
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diff changeset
344
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diff changeset
345 self._writeLine('<div>%s' % render_name)
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diff changeset
346 with IndentScope(self):
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diff changeset
347 if should_call:
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diff changeset
348 self._write(' : ')
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diff changeset
349 self._renderValue(value, self._makePath(path, name))
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diff changeset
350 self._writeLine('</div>')
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diff changeset
351 rendered_count += 1
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diff changeset
352
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diff changeset
353 return rendered_count
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diff changeset
354
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diff changeset
355 def _renderCollapsableValueStart(self, path):
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diff changeset
356 self._writeLine('<span style="cursor: pointer;" onclick="var l = '
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
357 'document.getElementById(\'piecrust-debug-data-%s\'); '
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
358 'if (l.style.display == \'none\') {'
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diff changeset
359 ' l.style.display = \'block\';'
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diff changeset
360 ' this.innerHTML = \'[-]\';'
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diff changeset
361 '} else {'
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diff changeset
362 ' l.style.display = \'none\';'
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diff changeset
363 ' this.innerHTML = \'[+]\';'
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diff changeset
364 '}">'
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diff changeset
365 '[+]'
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diff changeset
366 '</span>' %
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diff changeset
367 path)
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diff changeset
368 self._writeLine('<div style="display: none"'
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diff changeset
369 'id="piecrust-debug-data-%s">' % path)
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diff changeset
370
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diff changeset
371 def _renderCollapsableValueEnd(self):
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diff changeset
372 self._writeLine('</div>')
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373
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374 def _makePath(self, parent_path, key):
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375 return '%s-%s' % (parent_path, css_id_re.sub('-', str(key)))
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diff changeset
376
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diff changeset
377 def _writeLine(self, msg):
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diff changeset
378 self.output.write(self.indent * ' ')
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diff changeset
379 self.output.write(msg)
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diff changeset
380 self.output.write('\n')
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diff changeset
381
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diff changeset
382 def _writeStart(self, msg=None):
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diff changeset
383 self.output.write(self.indent * ' ')
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diff changeset
384 if msg is not None:
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diff changeset
385 self.output.write(msg)
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diff changeset
386
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diff changeset
387 def _write(self, msg):
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diff changeset
388 self.output.write(msg)
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parents:
diff changeset
389
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diff changeset
390 def _writeEnd(self, msg=None):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
391 if msg is not None:
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diff changeset
392 self.output.write(msg)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
393 self.output.write('\n')
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parents:
diff changeset
394
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
395
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
396 class IndentScope(object):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
397 def __init__(self, target):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
398 self.target = target
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
399
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
400 def __enter__(self):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
401 self.target.indent += 1
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
402 return self
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
403
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
404 def __exit__(self, exc_type, exc_val, exc_tb):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
405 self.target.indent -= 1
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
406