Mercurial > piecrust2

annotate piecrust/data/debug.py @ 3:f485ba500df3

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Gigantic change to basically make PieCrust 2 vaguely functional. - Serving works, with debug window. - Baking works, multi-threading, with dependency handling. - Various things not implemented yet.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 10 Aug 2014 23:43:16 -0700
parents
children 474c9882decf
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rev   line source
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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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 StringIO
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5 from piecrust import APP_VERSION, PIECRUST_URL
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6
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7
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8 logger = logging.getLogger(__name__)
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9
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10
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11 css_id_re = re.compile(r'[^\w\d\-]+')
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12
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13
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14 # CSS for the debug window.
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15 CSS_DEBUGINFO = """
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16 text-align: left;
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17 font-style: normal;
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18 padding: 1em;
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19 background: #a42;
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20 color: #fff;
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21 position: fixed;
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22 width: 50%;
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23 bottom: 0;
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24 right: 0;
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25 overflow: auto;
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26 max-height: 50%;
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27 box-shadow: 0 0 10px #633;
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28 """
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29
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30 # HTML elements.
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31 CSS_P = 'margin: 0; padding: 0;'
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32 CSS_A = 'color: #fff; text-decoration: none;'
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33
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34 # Headers.
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35 CSS_BIGHEADER = 'margin: 0.5em 0; font-weight: bold;'
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36 CSS_HEADER = 'margin: 0.5em 0; font-weight: bold;'
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37
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38 # Data block elements.
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39 CSS_DATA = 'font-family: Courier, sans-serif; font-size: 0.9em;'
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40 CSS_DATABLOCK = 'margin-left: 2em;'
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41 CSS_VALUE = 'color: #fca;'
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42 CSS_DOC = 'color: #fa8; font-size: 0.9em;'
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43
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44 # 'Baked with PieCrust' text
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45 BRANDING_TEXT = 'Baked with <em><a href="%s">PieCrust</a> %s</em>.' % (
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46 PIECRUST_URL, APP_VERSION)
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47
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48
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49 def build_debug_info(page, data):
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50 """ Generates HTML debug info for the given page's data.
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51 """
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52 output = StringIO.StringIO()
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53 try:
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54 _do_build_debug_info(page, data, output)
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55 return output.getvalue()
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56 finally:
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57 output.close()
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58
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59
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60 def _do_build_debug_info(page, data, output):
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61 app = page.app
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62 exec_info = app.env.exec_info_stack.current_page_info
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63
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64 print >>output, '<div id="piecrust-debug-info" style="%s">' % CSS_DEBUGINFO
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65
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66 print >>output, '<div>'
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67 print >>output, '<p style="%s"><strong>PieCrust %s</strong> &mdash; ' % (CSS_P, APP_VERSION)
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68
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69 # If we have some execution info in the environment,
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70 # add more information.
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71 if exec_info:
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72 if exec_info.was_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 else:
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86 output.write('no caching information available')
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87
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88 output.write(', ')
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89 if app.env.start_time != 0:
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90 output.write('in __PIECRUST_TIMING_INFORMATION__')
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91 else:
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92 output.write('no timing information available')
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93
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94 print >>output, '</p>'
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95 print >>output, '</div>'
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96
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97 if data:
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98 print >>output, '<div>'
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99 print >>output, ('<p style="%s cursor: pointer;" onclick="var l = '
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100 'document.getElementById(\'piecrust-debug-details\'); '
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101 'if (l.style.display == \'none\') l.style.display = '
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102 '\'block\'; else l.style.display = \'none\';">' % CSS_P)
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103 print >>output, ('<span style="%s">Template engine data</span> '
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104 '&mdash; click to toggle</a>.</p>' % CSS_BIGHEADER)
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105
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106 print >>output, '<div id="piecrust-debug-details" style="display: none;">'
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107 print >>output, ('<p style="%s">The following key/value pairs are '
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108 'available in the layout\'s markup, and most are '
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109 'available in the page\'s markup.</p>' % CSS_DOC)
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110
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111 filtered_data = dict(data)
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112 for k in filtered_data.keys():
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113 if k.startswith('__'):
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114 del filtered_data[k]
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115
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116 renderer = DebugDataRenderer(output)
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117 renderer.external_docs['data-site'] = (
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118 "This section comes from the site configuration file.")
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119 renderer.external_docs['data-page'] = (
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120 "This section comes from the page's configuration header.")
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121 renderer.renderData(filtered_data)
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122
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123 print >>output, '</div>'
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124 print >>output, '</div>'
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125
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126 print >>output, '</div>'
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127
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128
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129 class DebugDataRenderer(object):
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130 MAX_VALUE_LENGTH = 150
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131
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132 def __init__(self, output):
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133 self.indent = 0
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134 self.output = output
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diff changeset
135 self.external_docs = {}
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diff changeset
136
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diff changeset
137 def renderData(self, data):
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diff changeset
138 if not isinstance(data, dict):
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diff changeset
139 raise Exception("Expected top level data to be a dict.")
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diff changeset
140 self._writeLine('<div style="%s">' % CSS_DATA)
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diff changeset
141 self._renderDict(data, 'data')
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diff changeset
142 self._writeLine('</div>')
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parents:
diff changeset
143
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diff changeset
144 def _renderValue(self, data, path):
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diff changeset
145 if data is None:
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diff changeset
146 self._write('&lt;null&gt;')
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diff changeset
147 return
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diff changeset
148
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diff changeset
149 if isinstance(data, dict):
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diff changeset
150 self._renderCollapsableValueStart(path)
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diff changeset
151 with IndentScope(self):
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diff changeset
152 self._renderDict(data, path)
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diff changeset
153 self._renderCollapsableValueEnd()
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diff changeset
154 return
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parents:
diff changeset
155
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diff changeset
156 if isinstance(data, list):
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diff changeset
157 self._renderCollapsableValueStart(path)
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diff changeset
158 with IndentScope(self):
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159 self._renderList(data, path)
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diff changeset
160 self._renderCollapsableValueEnd()
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diff changeset
161 return
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diff changeset
162
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163 data_type = type(data)
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164 if data_type is bool:
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165 self._write('<span style="%s">%s</span>' % (CSS_VALUE,
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
166 'true' if bool(data) else 'false'))
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167 return
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168
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169 if data_type is int:
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170 self._write('<span style="%s">%d</span>' % (CSS_VALUE, data))
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parents:
diff changeset
171 return
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parents:
diff changeset
172
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diff changeset
173 if data_type is float:
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diff changeset
174 self._write('<span style="%s">%4.2f</span>' % (CSS_VALUE, data))
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parents:
diff changeset
175 return
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parents:
diff changeset
176
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parents:
diff changeset
177 if data_type in (str, unicode):
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diff changeset
178 if data_type == str:
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diff changeset
179 data = data.decode('utf8')
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diff changeset
180 if len(data) > DebugDataRenderer.MAX_VALUE_LENGTH:
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diff changeset
181 data = data[:DebugDataRenderer.MAX_VALUE_LENGTH - 5]
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parents:
diff changeset
182 data += '[...]'
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diff changeset
183 data = cgi.escape(data).encode('ascii', 'xmlcharrefreplace')
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parents:
diff changeset
184 self._write('<span style="%s">%s</span>' % (CSS_VALUE, data))
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parents:
diff changeset
185 return
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parents:
diff changeset
186
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parents:
diff changeset
187 self._renderCollapsableValueStart(path)
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parents:
diff changeset
188 with IndentScope(self):
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diff changeset
189 self._renderObject(data, path)
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parents:
diff changeset
190 self._renderCollapsableValueEnd()
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parents:
diff changeset
191
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diff changeset
192 def _renderList(self, data, path):
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diff changeset
193 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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parents:
diff changeset
194 self._renderDoc(data, path)
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diff changeset
195 self._renderAttributes(data, path)
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diff changeset
196 rendered_count = self._renderIterable(data, path, lambda d: enumerate(d))
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parents:
diff changeset
197 if rendered_count == 0:
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parents:
diff changeset
198 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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parents:
diff changeset
199 self._writeLine('</div>')
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parents:
diff changeset
200
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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diff changeset
201 def _renderDict(self, data, path):
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parents:
diff changeset
202 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
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parents:
diff changeset
203 self._renderDoc(data, path)
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parents:
diff changeset
204 self._renderAttributes(data, path)
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parents:
diff changeset
205 rendered_count = self._renderIterable(data, path,
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
206 lambda d: sorted(d.iteritems(), key=lambda i: i[0]))
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parents:
diff changeset
207 if rendered_count == 0:
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parents:
diff changeset
208 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
209 self._writeLine('</div>')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
210
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
211 def _renderObject(self, data, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
212 if hasattr(data.__class__, 'debug_render_func'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
213 # 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
214 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
215 render_func = getattr(data, render_func_name)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
216 value = render_func()
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
217 self._renderValue(value, path)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
218 return
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
219
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
220 self._writeLine('<div style="%s">' % CSS_DATABLOCK)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
221 self._renderDoc(data, path)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
222 rendered_attrs = self._renderAttributes(data, path)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
223
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
224 if (hasattr(data, '__iter__') and
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
225 hasattr(data.__class__, 'debug_render_items') and
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
226 data.__class__.debug_render_items):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
227 rendered_count = self._renderIterable(data, path,
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
228 lambda d: enumerate(d))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
229 if rendered_count == 0:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
230 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
231
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
232 elif rendered_attrs == 0:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
233 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
234
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
235 self._writeLine('</div>')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
236
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
237 def _renderIterable(self, data, path, iter_func):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
238 rendered_count = 0
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
239 with IndentScope(self):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
240 for i, item in iter_func(data):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
241 self._writeStart('<div>%s' % i)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
242 if item is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
243 self._write(' : ')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
244 self._renderValue(item, self._makePath(path, i))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
245 self._writeEnd('</div>')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
246 rendered_count += 1
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
247 return rendered_count
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.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
249 def _renderDoc(self, data, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
250 if hasattr(data.__class__, 'debug_render_doc'):
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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parents:
diff changeset
252 (CSS_DOC, data.__class__.debug_render_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 doc = self.external_docs.get(path)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
255 if doc is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
256 self._writeLine('<span style="%s">&ndash; %s</span>' %
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
257 (CSS_DOC, doc))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
258
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
259 def _renderAttributes(self, data, path):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
260 if not hasattr(data.__class__, 'debug_render'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
261 return 0
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
262
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
263 attr_names = list(data.__class__.debug_render)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
264 if hasattr(data.__class__, 'debug_render_dynamic'):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
265 drd = data.__class__.debug_render_dynamic
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
266 for ng in drd:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
267 name_gen = getattr(data, ng)
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268 attr_names += name_gen()
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269
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270 invoke_attrs = []
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271 if hasattr(data.__class__, 'debug_render_invoke'):
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272 invoke_attrs = list(data.__class__.debug_render_invoke)
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273 if hasattr(data.__class__, 'debug_render_invoke_dynamic'):
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274 drid = data.__class__.debug_render_invoke_dynamic
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275 for ng in drid:
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276 name_gen = getattr(data, ng)
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277 invoke_attrs += name_gen()
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278
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279 rendered_count = 0
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280 for name in attr_names:
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281 value = None
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282 render_name = name
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283 should_call = name in invoke_attrs
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284
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285 try:
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286 attr = getattr(data.__class__, name)
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287 except AttributeError:
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288 # This could be an attribute on the instance itself, or some
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289 # dynamic attribute.
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290 attr = getattr(data, name)
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291
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292 if callable(attr):
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293 attr_func = getattr(data, name)
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294 argcount = attr_func.__code__.co_argcount
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295 var_names = attr_func.__code__.co_varnames
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296 if argcount == 1 and should_call:
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297 render_name += '()'
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298 value = attr_func()
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299 else:
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300 if should_call:
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301 logger.warning("Method '%s' should be invoked for "
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302 "rendering, but it has %s arguments." %
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303 (name, argcount))
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304 should_call = False
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305 render_name += '(%s)' % ','.join(var_names[1:])
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306 elif should_call:
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307 value = getattr(data, name)
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308
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309 self._writeLine('<div>%s' % render_name)
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310 with IndentScope(self):
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311 if should_call:
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312 self._write(' : ')
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313 self._renderValue(value, self._makePath(path, name))
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314 self._writeLine('</div>')
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315 rendered_count += 1
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316
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317 return rendered_count
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318
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319 def _renderCollapsableValueStart(self, path):
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320 self._writeLine('<span style="cursor: pointer;" onclick="var l = '
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321 'document.getElementById(\'piecrust-debug-data-%s\'); '
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322 'if (l.style.display == \'none\') {'
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323 ' l.style.display = \'block\';'
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324 ' this.innerHTML = \'[-]\';'
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325 '} else {'
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326 ' l.style.display = \'none\';'
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327 ' this.innerHTML = \'[+]\';'
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328 '}">'
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329 '[+]'
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330 '</span>' %
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331 path)
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332 self._writeLine('<div style="display: none"'
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333 'id="piecrust-debug-data-%s">' % path)
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334
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335 def _renderCollapsableValueEnd(self):
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336 self._writeLine('</div>')
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337
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338 def _makePath(self, parent_path, key):
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339 return '%s-%s' % (parent_path, css_id_re.sub('-', str(key)))
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340
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341 def _writeLine(self, msg):
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342 self.output.write(self.indent * ' ')
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343 self.output.write(msg)
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344 self.output.write('\n')
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345
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346 def _writeStart(self, msg=None):
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347 self.output.write(self.indent * ' ')
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348 if msg is not None:
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349 self.output.write(msg)
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350
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351 def _write(self, msg):
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352 self.output.write(msg)
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353
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354 def _writeEnd(self, msg=None):
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355 if msg is not None:
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356 self.output.write(msg)
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357 self.output.write('\n')
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358
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359
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360 class IndentScope(object):
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361 def __init__(self, target):
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362 self.target = target
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363
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364 def __enter__(self):
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365 self.target.indent += 1
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366 return self
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367
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368 def __exit__(self, exc_type, exc_val, exc_tb):
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369 self.target.indent -= 1
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diff changeset
370