Mercurial > piecrust2

annotate piecrust/sources/base.py @ 36:485682a6de50

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New site layout support.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 20 Aug 2014 23:16:51 -0700
parents 4bd840ae75cd
children 2fec3ee1298f
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1 import re
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2 import os
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3 import os.path
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4 import logging
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5 from werkzeug.utils import cached_property
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6 from piecrust.configuration import ConfigurationError
6
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7 from piecrust.data.base import IPaginationSource, PaginationData
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8 from piecrust.data.filters import PaginationFilter
3
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9 from piecrust.page import Page
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10
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11
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12 REALM_USER = 0
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13 REALM_THEME = 1
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14 REALM_NAMES = {
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15 REALM_USER: 'User',
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16 REALM_THEME: 'Theme'}
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17
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18
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19 MODE_PARSING = 0
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20 MODE_CREATING = 1
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21
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22
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23 logger = logging.getLogger(__name__)
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24
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25
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26 page_ref_pattern = re.compile(r'(?P<src>[\w]+)\:(?P<path>.*?)(;|$)')
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27
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28
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29 class PageNotFoundError(Exception):
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30 pass
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31
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32
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33 class InvalidFileSystemEndpointError(Exception):
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34 def __init__(self, source_name, fs_endpoint):
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35 super(InvalidFileSystemEndpointError, self).__init__(
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36 "Invalid file-system endpoint for source '%s': %s" %
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37 (source_name, fs_endpoint))
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38
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39
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40 class PageFactory(object):
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41 """ A class responsible for creating a page.
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42 """
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43 def __init__(self, source, rel_path, metadata):
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44 self.source = source
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45 self.rel_path = rel_path
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46 self.metadata = metadata
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47
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48 @property
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49 def ref_spec(self):
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50 return '%s:%s' % (self.source.name, self.rel_path)
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51
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52 @cached_property
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53 def path(self):
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54 return self.source.resolveRef(self.rel_path)
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55
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56 def buildPage(self):
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57 repo = self.source.app.env.page_repository
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58 if repo is not None:
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59 cache_key = '%s:%s' % (self.source.name, self.rel_path)
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60 return repo.get(cache_key, self._doBuildPage)
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61 return self._doBuildPage()
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62
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63 def _doBuildPage(self):
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64 logger.debug("Building page: %s" % self.path)
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65 page = Page(self.source, self.metadata, self.rel_path)
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66 # Load it right away, especially when using the page repository,
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67 # because we'll be inside a critical scope.
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68 page._load()
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69 return page
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70
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71
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72 class CachedPageFactory(object):
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73 """ A `PageFactory` (in appearance) that already has a page built.
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74 """
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75 def __init__(self, page):
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76 self._page = page
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77
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78 @property
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79 def rel_path(self):
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80 return self._page.rel_path
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81
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82 @property
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83 def metadata(self):
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84 return self._page.source_metadata
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85
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86 @property
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87 def ref_spec(self):
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88 return self._page.ref_spec
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89
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90 @property
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91 def path(self):
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92 return self._page.path
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93
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94 def buildPage(self):
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95 return self._page
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96
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97
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98 class PageRef(object):
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99 """ A reference to a page, with support for looking a page in different
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100 realms.
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101 """
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102 def __init__(self, app, page_ref):
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103 self.app = app
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104 self._page_ref = page_ref
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105 self._paths = None
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106 self._first_valid_path_index = -2
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107 self._exts = list(app.config.get('site/auto_formats').keys())
3
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108
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109 @property
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110 def exists(self):
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111 try:
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112 self._checkPaths()
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113 return True
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114 except PageNotFoundError:
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115 return False
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116
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117 @property
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118 def source_name(self):
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119 self._checkPaths()
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120 return self._paths[self._first_valid_path_index][0]
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121
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122 @property
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123 def source(self):
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124 return self.app.getSource(self.source_name)
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125
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126 @property
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127 def rel_path(self):
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128 self._checkPaths()
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129 return self._paths[self._first_valid_path_index][1]
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130
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131 @property
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132 def path(self):
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133 self._checkPaths()
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134 return self._paths[self._first_valid_path_index][2]
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135
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136 @property
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137 def possible_rel_paths(self):
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138 self._load()
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139 return [p[1] for p in self._paths]
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140
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141 @property
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142 def possible_paths(self):
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143 self._load()
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144 return [p[2] for p in self._paths]
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145
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146 def _load(self):
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147 if self._paths is not None:
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148 return
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149
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150 it = list(page_ref_pattern.finditer(self._page_ref))
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151 if len(it) == 0:
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152 raise Exception("Invalid page ref: %s" % self._page_ref)
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153
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154 self._paths = []
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155 for m in it:
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156 source_name = m.group('src')
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157 source = self.app.getSource(source_name)
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158 if source is None:
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159 raise Exception("No such source: %s" % source_name)
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160 rel_path = m.group('path')
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161 path = source.resolveRef(rel_path)
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162 if '%ext%' in rel_path:
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163 for e in self._exts:
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164 self._paths.append((source_name,
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165 rel_path.replace('%ext%', e),
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166 path.replace('%ext%', e)))
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167 else:
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168 self._paths.append((source_name, rel_path, path))
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169
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170 def _checkPaths(self):
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171 if self._first_valid_path_index >= 0:
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172 return
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173 if self._first_valid_path_index == -1:
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174 raise PageNotFoundError("No valid paths were found for page reference:" %
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175 self._page_ref)
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176
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177 self._load()
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178 for i, path_info in enumerate(self._paths):
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179 if os.path.isfile(path_info[2]):
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180 self._first_valid_path_index = i
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181 break
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182
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183
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184 class PageSource(object):
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185 """ A source for pages, e.g. a directory with one file per page.
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186 """
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187 def __init__(self, app, name, config):
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188 self.app = app
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189 self.name = name
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190 self.config = config
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191 self._factories = None
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192 self._provider_type = None
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193
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194 def __getattr__(self, name):
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195 try:
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196 return self.config[name]
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197 except KeyError:
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198 raise AttributeError()
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199
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200 @property
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201 def is_theme_source(self):
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202 return self.realm == REALM_THEME
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203
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204 @property
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205 def root_dir(self):
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206 if self.is_theme_source:
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207 return self.app.theme_dir
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208 return self.app.root_dir
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209
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210 def getPageFactories(self):
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211 if self._factories is None:
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212 self._factories = list(self.buildPageFactories())
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213 return self._factories
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214
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215 def buildPageFactories(self):
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216 raise NotImplementedError()
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217
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218 def resolveRef(self, ref_path):
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219 raise NotImplementedError()
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220
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221 def findPagePath(self, metadata, mode):
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222 raise NotImplementedError()
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223
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224 def buildDataProvider(self, page, user_data):
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225 if self._provider_type is None:
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226 cls = next((pt for pt in self.app.plugin_loader.getDataProviders()
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227 if pt.PROVIDER_NAME == self.data_type),
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228 None)
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229 if cls is None:
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230 raise ConfigurationError("Unknown data provider type: %s" %
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231 self.data_type)
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232 self._provider_type = cls
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233
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234 return self._provider_type(self, page, user_data)
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235
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236 def getTaxonomyPageRef(self, tax_name):
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237 tax_pages = self.config.get('taxonomy_pages')
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238 if tax_pages is None:
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239 return None
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240 return tax_pages.get(tax_name)
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241
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242
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243 class IPreparingSource:
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244 def setupPrepareParser(self, parser, app):
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245 raise NotImplementedError()
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246
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247 def buildMetadata(self, args):
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248 raise NotImplementedError()
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249
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250
6
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251 class SimplePaginationSourceMixin(IPaginationSource):
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252 def getItemsPerPage(self):
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253 return self.config['items_per_page']
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254
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255 def getSourceIterator(self):
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256 return SourceFactoryIterator(self)
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257
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258 def getSorterIterator(self, it):
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259 return DateSortIterator(it)
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260
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261 def getTailIterator(self, it):
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262 return PaginationDataBuilderIterator(it)
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263
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264 def getPaginationFilter(self, page):
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265 conf = (page.config.get('items_filters') or
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266 page.app.config.get('site/items_filters'))
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267 if conf == 'none' or conf == 'nil' or conf == '':
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268 conf = None
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diff changeset
269 if conf is not None:
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270 f = PaginationFilter()
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271 f.addClausesFromConfig(conf)
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272 return f
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273 return None
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274
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275
7
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276 class ArraySource(PageSource, SimplePaginationSourceMixin):
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277 def __init__(self, app, inner_source, name='array', config=None):
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278 super(ArraySource, self).__init__(app, name, config or {})
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279 self.inner_source = inner_source
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280
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281 @property
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282 def page_count(self):
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283 return len(self.inner_source)
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284
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285 def getPageFactories(self):
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286 for p in self.inner_source:
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287 yield CachedPageFactory(p)
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288
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289
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290 class SimplePageSource(PageSource):
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291 def __init__(self, app, name, config):
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292 super(SimplePageSource, self).__init__(app, name, config)
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293 self.fs_endpoint = config.get('fs_endpoint', name)
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294 self.fs_endpoint_path = os.path.join(self.root_dir, self.fs_endpoint)
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295 self.supported_extensions = list(app.config.get('site/auto_formats').keys())
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296 self.default_auto_format = app.config.get('site/default_auto_format')
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297
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298 def buildPageFactories(self):
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299 logger.debug("Scanning for pages in: %s" % self.fs_endpoint_path)
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300 if not os.path.isdir(self.fs_endpoint_path):
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301 raise InvalidFileSystemEndpointError(self.name, self.fs_endpoint_path)
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302
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303 for dirpath, dirnames, filenames in os.walk(self.fs_endpoint_path):
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304 rel_dirpath = os.path.relpath(dirpath, self.fs_endpoint_path)
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305 dirnames[:] = list(filter(self._filterPageDirname, dirnames))
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306 for f in filter(self._filterPageFilename, filenames):
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307 slug, ext = os.path.splitext(os.path.join(rel_dirpath, f))
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308 slug = slug.replace('\\', '/')
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309 if ext.lstrip('.') not in self.supported_extensions:
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310 slug += ext
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311 if slug.startswith('./') or slug.startswith('.\\'):
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312 slug = slug[2:]
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313 if slug == '_index':
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314 slug = ''
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315 metadata = {'path': slug}
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316 fac_path = f
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317 if rel_dirpath != '.':
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318 fac_path = os.path.join(rel_dirpath, f)
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319 fac_path = fac_path.replace('\\', '/')
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320 yield PageFactory(self, fac_path, metadata)
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321
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322 def resolveRef(self, ref_path):
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323 return os.path.normpath(
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324 os.path.join(self.fs_endpoint_path, ref_path))
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325
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326 def findPagePath(self, metadata, mode):
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327 uri_path = metadata['path']
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328 if uri_path == '':
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329 uri_path = '_index'
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330 path = os.path.normpath(os.path.join(self.fs_endpoint_path, uri_path))
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331 _, ext = os.path.splitext(path)
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332
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333 if mode == MODE_CREATING:
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334 if ext == '':
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335 path = '%s.%s' % (path, self.default_auto_format)
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336 rel_path = os.path.relpath(path, self.fs_endpoint_path)
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337 rel_path = rel_path.replace('\\', '/')
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338 return rel_path, metadata
3
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339
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340 if ext == '':
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341 paths_to_check = ['%s.%s' % (path, e)
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342 for e in self.supported_extensions]
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343 else:
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344 paths_to_check = [path]
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345 for path in paths_to_check:
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346 if os.path.isfile(path):
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347 rel_path = os.path.relpath(path, self.fs_endpoint_path)
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348 rel_path = rel_path.replace('\\', '/')
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349 return rel_path, metadata
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350
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351 return None, None
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352
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353 def _filterPageDirname(self, d):
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354 return not d.endswith('-assets')
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355
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356 def _filterPageFilename(self, f):
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357 name, ext = os.path.splitext(f)
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358 return (f[0] != '.' and # .DS_store and other crap
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359 f[-1] != '~' and # Vim temp files and what-not
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360 f not in ['Thumbs.db']) # Windows bullshit
3
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361
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362
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363 class DefaultPageSource(SimplePageSource, IPreparingSource,
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364 SimplePaginationSourceMixin):
3
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365 SOURCE_NAME = 'default'
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366
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367 def __init__(self, app, name, config):
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368 super(DefaultPageSource, self).__init__(app, name, config)
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369
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370 def setupPrepareParser(self, parser, app):
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371 parser.add_argument('uri', help='The URI for the new page.')
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372
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373 def buildMetadata(self, args):
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374 return {'path': args.uri}
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375
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diff changeset
376
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377 class SourceFactoryIterator(object):
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378 def __init__(self, source):
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379 self.source = source
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380 self.it = None # This is to permit recursive traversal of the
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381 # iterator chain. It acts as the end.
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382
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383 def __iter__(self):
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384 for factory in self.source.getPageFactories():
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385 yield factory.buildPage()
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diff changeset
386
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diff changeset
387
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388 class DateSortIterator(object):
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389 def __init__(self, it, reverse=True):
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390 self.it = it
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391 self.reverse = reverse
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392
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393 def __iter__(self):
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394 return iter(sorted(self.it,
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diff changeset
395 key=lambda x: x.datetime, reverse=self.reverse))
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diff changeset
396
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diff changeset
397
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diff changeset
398 class PaginationDataBuilderIterator(object):
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diff changeset
399 def __init__(self, it):
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diff changeset
400 self.it = it
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diff changeset
401
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diff changeset
402 def __iter__(self):
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diff changeset
403 for page in self.it:
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617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
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diff changeset
404 if page is None:
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diff changeset
405 yield None
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diff changeset
406 else:
617191dec18e Fixes for Windows, make `findPagePath` return a ref path.
Ludovic Chabant <ludovic@chabant.com>
parents: 7
diff changeset
407 yield PaginationData(page)
6
f5ca5c5bed85 More Python 3 fixes, modularization, and new unit tests.
Ludovic Chabant <ludovic@chabant.com>
parents: 5
diff changeset
408