Mercurial > piecrust2

annotate piecrust/page.py @ 5:474c9882decf

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Upgrade to Python 3.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 11 Aug 2014 22:36:47 -0700
parents f485ba500df3
children f5ca5c5bed85
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rev   line source
3
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1 import re
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2 import sys
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3 import json
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4 import codecs
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5 import os.path
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6 import hashlib
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7 import logging
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8 import datetime
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9 import dateutil.parser
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10 import threading
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11 from piecrust.configuration import (Configuration, ConfigurationError,
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12 parse_config_header)
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13 from piecrust.environment import PHASE_PAGE_PARSING
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14
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15
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16 logger = logging.getLogger(__name__)
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17
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18
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19 class PageConfiguration(Configuration):
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20 def __init__(self, values=None, validate=True):
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21 super(PageConfiguration, self).__init__(values, validate)
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22
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23 def _validateAll(self, values):
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24 values.setdefault('title', 'Untitled Page')
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25 values.setdefault('content_type', 'html')
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26 ppp = values.get('posts_per_page')
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27 if ppp is not None:
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28 values.setdefault('items_per_page', ppp)
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29 pf = values.get('posts_filters')
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30 if pf is not None:
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31 values.setdefault('items_filters', pf)
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32 return values
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33
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34
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35 class Page(object):
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36 def __init__(self, source, source_metadata, rel_path):
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37 self.source = source
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38 self.source_metadata = source_metadata
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39 self.rel_path = rel_path
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40 self.path = source.resolveRef(rel_path)
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41 self._config = None
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42 self._raw_content = None
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43 self._datetime = None
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44
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45 @property
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46 def app(self):
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47 return self.source.app
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48
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49 @property
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50 def ref_spec(self):
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51 return '%s:%s' % (self.source.name, self.rel_path)
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52
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53 @property
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54 def config(self):
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55 self._load()
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56 return self._config
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57
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58 @property
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59 def raw_content(self):
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60 self._load()
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61 return self._raw_content
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62
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63 @property
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64 def datetime(self):
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65 if self._datetime is None:
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66 if 'datetime' in self.source_metadata:
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67 self._datetime = self.source_metadata['datetime']
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68 elif 'date' in self.source_metadata:
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69 page_date = self.source_metadata['date']
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70 timestr = self.config.get('time')
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71 if timestr is not None:
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72 try:
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73 time_dt = dateutil.parser.parse(timestr)
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74 except Exception as e:
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75 raise ConfigurationError(
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76 "Invalid time '%s' in page: %s" %
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77 (timestr, self.path), e)
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78 page_time = datetime.time(time_dt.hour, time_dt.minute, time_dt.second)
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79 else:
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80 page_time = datetime.time(0, 0, 0)
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81 self._datetime = datetime.datetime.combine(page_date, page_time)
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82 else:
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83 self._datetime = datetime.datetime.fromtimestamp(os.path.getmtime(self.path))
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84 return self._datetime
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85
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86 @datetime.setter
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87 def datetime(self, value):
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88 self._datetime = value
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89
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90 def getSegment(self, name='content'):
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91 return self.raw_content[name]
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92
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93 def _load(self):
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94 if self._config is not None:
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95 return
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96
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97 eis = self.app.env.exec_info_stack
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98 eis.pushPage(self, PHASE_PAGE_PARSING, None)
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99 try:
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100 config, content = load_page(self.app, self.path)
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101 self._config = config
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102 self._raw_content = content
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103 finally:
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104 eis.popPage()
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105
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106
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107 class PageLoadingError(Exception):
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108 def __init__(self, path, inner=None):
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109 super(PageLoadingError, self).__init__(
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110 "Error loading page: %s" % path,
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111 inner)
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112
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113
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114 class ContentSegment(object):
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115 debug_render_func = 'debug_render'
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116
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117 def __init__(self, content=None, fmt=None):
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118 self.parts = []
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119 if content is not None:
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120 self.parts.append(ContentSegmentPart(content, fmt))
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121
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122 def debug_render(self):
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123 return '\n'.join([p.content for p in self.parts])
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124
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125
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126 class ContentSegmentPart(object):
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127 def __init__(self, content, fmt=None, line=-1):
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128 self.content = content
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129 self.fmt = fmt
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130 self.line = line
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131
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132 def __str__(self):
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133 return '%s [%s]' % (self.content, self.fmt or '<default>')
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134
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135
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136 def json_load_segments(data):
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137 segments = {}
5
474c9882decf Upgrade to Python 3.
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diff changeset
138 for key, seg_data in data.items():
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139 seg = ContentSegment()
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140 for p_data in seg_data:
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141 part = ContentSegmentPart(p_data['c'], p_data['f'], p_data['l'])
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142 seg.parts.append(part)
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143 segments[key] = seg
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144 return segments
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145
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146
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147 def json_save_segments(segments):
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148 data = {}
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149 for key, seg in segments.items():
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150 seg_data = []
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151 for part in seg.parts:
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152 p_data = {'c': part.content, 'f': part.fmt, 'l': part.line}
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153 seg_data.append(p_data)
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154 data[key] = seg_data
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155 return data
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156
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157
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158 def load_page(app, path):
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159 try:
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160 return _do_load_page(app, path)
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161 except Exception as e:
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162 logger.exception("Error loading page: %s" %
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163 os.path.relpath(path, app.root_dir))
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164 _, __, traceback = sys.exc_info()
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165 raise PageLoadingError(path, e).with_traceback(traceback)
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166
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167
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168 def _do_load_page(app, path):
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169 exec_info = app.env.exec_info_stack.current_page_info
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170 if exec_info is None:
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171 raise Exception("Loading page '%s' but not execution context has "
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172 "been created for it." % path)
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173
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174 # Check the cache first.
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175 cache = app.cache.getCache('pages')
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176 cache_path = "%s.json" % hashlib.md5(path).hexdigest()
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177 page_time = os.path.getmtime(path)
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178 if cache.isValid(cache_path, page_time):
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179 exec_info.was_cache_valid = True
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180 cache_data = json.loads(cache.read(cache_path))
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181 config = PageConfiguration(values=cache_data['config'],
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182 validate=False)
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183 content = json_load_segments(cache_data['content'])
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184 return config, content
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185
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186 # Nope, load the page from the source file.
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187 exec_info.was_cache_valid = False
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188 logger.debug("Loading page configuration from: %s" % path)
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189 with codecs.open(path, 'r', 'utf-8') as fp:
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190 raw = fp.read()
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191 header, offset = parse_config_header(raw)
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192
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193 if not 'format' in header:
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194 auto_formats = app.config.get('site/auto_formats')
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195 name, ext = os.path.splitext(path)
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196 header['format'] = auto_formats.get(ext, None)
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197
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198 config = PageConfiguration(header)
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199 content = parse_segments(raw, offset)
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200 config.set('segments', list(content.keys()))
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201
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202 # Save to the cache.
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203 cache_data = {
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204 'config': config.get(),
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205 'content': json_save_segments(content)}
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206 cache.write(cache_path, json.dumps(cache_data))
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207
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208 return config, content
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209
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210
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211 segment_pattern = re.compile(
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212 r"""^\-\-\-\s*(?P<name>\w+)(\:(?P<fmt>\w+))?\s*\-\-\-\s*$""",
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213 re.M)
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214 part_pattern = re.compile(
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215 r"""^<\-\-\s*(?P<fmt>\w+)\s*\-\->\s*$""",
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216 re.M)
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217
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218
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219 def parse_segments(raw, offset=0):
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220 matches = list(segment_pattern.finditer(raw, offset))
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221 num_matches = len(matches)
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222 if num_matches > 0:
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223 contents = {}
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224
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225 first_offset = matches[0].start()
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226 if first_offset > 0:
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227 # There's some default content segment at the beginning.
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228 seg = ContentSegment()
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229 seg.parts = parse_segment_parts(raw, offset, first_offset)
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230 contents['content'] = seg
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231
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232 for i in range(1, num_matches):
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233 m1 = matches[i - 1]
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234 m2 = matches[i]
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235 seg = ContentSegment()
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236 seg.parts = parse_segment_parts(raw, m1.end() + 1,
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237 m2.start(), m1.group('fmt'))
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238 contents[m1.group('name')] = seg
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239
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240 # Handle text past the last match.
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241 lastm = matches[-1]
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242 seg = ContentSegment()
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243 seg.parts = parse_segment_parts(raw, lastm.end() + 1,
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244 len(raw), lastm.group('fmt'))
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245 contents[lastm.group('name')] = seg
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246
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247 return contents
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248 else:
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249 # No segments, just content.
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250 seg = ContentSegment()
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251 seg.parts = parse_segment_parts(raw, offset, len(raw))
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252 return {'content': seg}
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253
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254
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255 def parse_segment_parts(raw, start, end, first_part_fmt=None):
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256 matches = list(part_pattern.finditer(raw, start, end))
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257 num_matches = len(matches)
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258 if num_matches > 0:
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259 parts = []
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260
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261 # First part, before the first format change.
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262 parts.append(
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263 ContentSegmentPart(raw[start:matches[0].start()],
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264 first_part_fmt,
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265 start))
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266
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267 for i in range(1, num_matches):
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268 m1 = matches[i - 1]
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269 m2 = matches[i]
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270 parts.append(
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271 ContentSegmentPart(
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272 raw[m1.end() + 1:m2.start()],
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
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273 m1.group('fmt'),
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
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274 m1.end() + 1))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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275
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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276 lastm = matches[-1]
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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277 parts.append(ContentSegmentPart(raw[lastm.end() + 1:end],
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
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278 lastm.group('fmt'),
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
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279 lastm.end() + 1))
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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280
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
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281 return parts
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
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282 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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283 return [ContentSegmentPart(raw[start:end], first_part_fmt)]
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
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284