Mercurial > piecrust2

annotate piecrust/data/debug.py @ 182:a54d3c0b5f4a

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tests: Patch `os.path.exists` and improve patching for `open`. You can specify additional modules for which to patch `open`. Also, it was incorrectly updating the opened file, even when it was opened for read only. Now it only updates the contents if the file was opened for write, and supports appending to the end. Last, it supports opening text files in binary mode.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 04 Jan 2015 14:55:41 -0800
parents 0445a2232de7
children d7a548ebcd58
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 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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diff changeset
133
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diff changeset
134 def renderData(self, data):
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135 if not isinstance(data, dict):
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diff changeset
136 raise Exception("Expected top level data to be a dict.")
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diff changeset
137 self._writeLine('<div style="%s">' % CSS_DATA)
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diff changeset
138 self._renderDict(data, 'data')
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diff changeset
139 self._writeLine('</div>')
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diff changeset
140
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diff changeset
141 def _renderValue(self, data, path):
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diff changeset
142 if data is None:
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diff changeset
143 self._write('&lt;null&gt;')
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diff changeset
144 return
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diff changeset
145
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146 if isinstance(data, dict):
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147 self._renderCollapsableValueStart(path)
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diff changeset
148 with IndentScope(self):
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diff changeset
149 self._renderDict(data, path)
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diff changeset
150 self._renderCollapsableValueEnd()
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diff changeset
151 return
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diff changeset
152
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153 if isinstance(data, list):
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diff changeset
154 self._renderCollapsableValueStart(path)
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diff changeset
155 with IndentScope(self):
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diff changeset
156 self._renderList(data, path)
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diff changeset
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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parents:
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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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diff changeset
175 if len(data) > DebugDataRenderer.MAX_VALUE_LENGTH:
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176 data = data[:DebugDataRenderer.MAX_VALUE_LENGTH - 5]
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diff changeset
177 data += '[...]'
14
395eb38f2dfb Properly escape HTML characters in the debug info, add more options.
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parents: 7
diff changeset
178 data = html.escape(data)
3
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diff changeset
179 self._write('<span style="%s">%s</span>' % (CSS_VALUE, data))
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parents:
diff changeset
180 return
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parents:
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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diff changeset
184 self._renderObject(data, path)
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diff changeset
185 self._renderCollapsableValueEnd()
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parents:
diff changeset
186
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diff changeset
187 def _renderList(self, data, path):
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188 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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parents:
diff changeset
189 self._renderDoc(data, path)
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diff changeset
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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parents:
diff changeset
192 if rendered_count == 0:
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diff changeset
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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diff changeset
194 self._writeLine('</div>')
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diff changeset
195
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diff changeset
196 def _renderDict(self, data, path):
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diff changeset
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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diff changeset
200 rendered_count = self._renderIterable(data, path,
5
474c9882decf Upgrade to Python 3.
Ludovic Chabant <ludovic@chabant.com>
parents: 3
diff changeset
201 lambda d: sorted(iter(d.items()), key=lambda i: i[0]))
3
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diff changeset
202 if rendered_count == 0:
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diff changeset
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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parents:
diff changeset
204 self._writeLine('</div>')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
205
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
206 def _renderObject(self, data, path):
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parents:
diff changeset
207 if hasattr(data.__class__, 'debug_render_func'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
208 # This object wants to be rendered as a simple string...
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
209 render_func_name = data.__class__.debug_render_func
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
210 render_func = getattr(data, render_func_name)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
211 value = render_func()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
212 self._renderValue(value, path)
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parents:
diff changeset
213 return
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
214
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
215 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
216 self._renderDoc(data, path)
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diff changeset
217 rendered_attrs = self._renderAttributes(data, path)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
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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parents:
diff changeset
220 hasattr(data.__class__, 'debug_render_items') and
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
221 data.__class__.debug_render_items):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
222 rendered_count = self._renderIterable(data, path,
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
223 lambda d: enumerate(d))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
224 if rendered_count == 0:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
225 self._writeLine('<p style="%s %s">(empty)</p>' % (CSS_P, CSS_DOC))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
226
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
227 elif rendered_attrs == 0:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
228 self._writeLine('<p style="%s %s">(empty)</p>' % (CSS_P, CSS_DOC))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
229
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
230 self._writeLine('</div>')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
231
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
232 def _renderIterable(self, data, path, iter_func):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
233 rendered_count = 0
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
234 with IndentScope(self):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
235 for i, item in iter_func(data):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
236 self._writeStart('<div>%s' % i)
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parents:
diff changeset
237 if item is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
238 self._write(' : ')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
239 self._renderValue(item, self._makePath(path, i))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
240 self._writeEnd('</div>')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
241 rendered_count += 1
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
242 return rendered_count
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
243
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
244 def _renderDoc(self, data, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
245 if hasattr(data.__class__, 'debug_render_doc'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
246 self._writeLine('<span style="%s">&ndash; %s</span>' %
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
247 (CSS_DOC, data.__class__.debug_render_doc))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
248
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
249 doc = self.external_docs.get(path)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
250 if doc is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
251 self._writeLine('<span style="%s">&ndash; %s</span>' %
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
252 (CSS_DOC, doc))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
253
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
254 def _renderAttributes(self, data, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
255 if not hasattr(data.__class__, 'debug_render'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
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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parents:
diff changeset
258 attr_names = list(data.__class__.debug_render)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
259 if hasattr(data.__class__, 'debug_render_dynamic'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
260 drd = data.__class__.debug_render_dynamic
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
261 for ng in drd:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
262 name_gen = getattr(data, ng)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
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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parents:
diff changeset
265 invoke_attrs = []
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
266 if hasattr(data.__class__, 'debug_render_invoke'):
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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
14
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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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diff changeset
361 if msg is not None:
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362 self.output.write(msg)
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diff changeset
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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diff changeset
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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diff changeset
376