Mercurial > piecrust2

annotate piecrust/data/linker.py @ 250:311447fe3dd0

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oops: Remove debug print.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 20 Feb 2015 23:44:23 -0800
parents d9d5c5de02a8
children 2408eb6f4da8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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diff changeset
1 import logging
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2 import collections
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3 from piecrust.data.base import PaginationData
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4 from piecrust.data.iterators import PageIterator
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5 from piecrust.sources.base import build_pages
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6 from piecrust.sources.interfaces import IPaginationSource, IListableSource
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9 logger = logging.getLogger(__name__)
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11
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12 class PageLinkerData(object):
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13 """ Entry template data to get access to related pages from a given
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14 root page.
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15 """
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16 def __init__(self, source, page_path):
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17 self._linker = Linker(source, page_path)
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18
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19 @property
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20 def siblings(self):
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21 return self._linker
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22
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23 @property
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24 def children(self):
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25 self._linker._load()
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26 if self._linker._self_item is None:
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27 return None
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28 return self._linker._self_item.config.get('__linker_child')
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29
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30 @property
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31 def root(self):
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32 return self._linker.root
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33
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34 def forpath(self, rel_path):
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35 return self._linker.forpath(rel_path)
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37
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38 class LinkedPageData(PaginationData):
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39 """ Class whose instances get returned when iterating on a `Linker`
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40 or `RecursiveLinker`. It's just like what gets usually returned by
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41 `Paginator` and other page iterators, but with a few additional data
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42 like hierarchical data.
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43 """
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44 debug_render = ['is_dir', 'is_self'] + PaginationData.debug_render
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45
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46 def __init__(self, page):
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47 super(LinkedPageData, self).__init__(page)
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48 self.name = page.config.get('__linker_name')
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49 self.is_self = page.config.get('__linker_is_self')
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50 self.children = page.config.get('__linker_child')
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51 self.is_dir = (self.children is not None)
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52 self.is_page = True
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53
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54 self.mapLoader('*', self._linkerChildLoader)
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55
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56 def _linkerChildLoader(self, name):
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57 return getattr(self.children, name)
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58
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59
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60 class LinkedPageDataBuilderIterator(object):
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61 """ Iterator that builds `LinkedPageData` out of pages.
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62 """
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63 def __init__(self, it):
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64 self.it = it
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65
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66 def __iter__(self):
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67 for item in self.it:
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68 yield LinkedPageData(item)
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71 class LinkerSource(IPaginationSource):
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72 """ Source iterator that returns pages given by `Linker`.
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73 """
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74 def __init__(self, pages, orig_source):
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75 self._pages = list(pages)
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76 self._orig_source = None
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77 if isinstance(orig_source, IPaginationSource):
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78 self._orig_source = orig_source
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79
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80 def getItemsPerPage(self):
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81 raise NotImplementedError()
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82
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83 def getSourceIterator(self):
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84 return self._pages
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85
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86 def getSorterIterator(self, it):
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87 # We don't want to sort the pages -- we expect the original source
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88 # to return hierarchical items in the order it wants already.
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89 return None
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90
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91 def getTailIterator(self, it):
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92 return LinkedPageDataBuilderIterator(it)
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93
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94 def getPaginationFilter(self, page):
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95 return None
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96
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97 def getSettingAccessor(self):
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98 if self._orig_source:
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99 return self._orig_source.getSettingAccessor()
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100 return None
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101
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102
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103 class Linker(object):
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104 debug_render_doc = """Provides access to sibling and children pages."""
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105
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106 def __init__(self, source, root_page_path, *, name=None, dir_path=None):
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107 self._source = source
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108 self._root_page_path = root_page_path
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109 self._name = name
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110 self._dir_path = dir_path
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111 self._items = None
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112 self._self_item = None
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113
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114 self.is_dir = True
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115 self.is_page = False
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116 self.is_self = False
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117
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118 def __iter__(self):
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119 return iter(self.pages)
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120
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121 def __getattr__(self, name):
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122 self._load()
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123 try:
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124 item = self._items[name]
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125 except KeyError:
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126 raise AttributeError()
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127
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128 if isinstance(item, Linker):
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129 return item
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130
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diff changeset
131 return LinkedPageData(item)
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132
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133 @property
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134 def name(self):
879fe1457e48 data: `Linker` refactor.
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diff changeset
135 if self._name is None:
879fe1457e48 data: `Linker` refactor.
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136 self._load()
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137 return self._name
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138
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diff changeset
139 @property
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diff changeset
140 def children(self):
879fe1457e48 data: `Linker` refactor.
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diff changeset
141 return self._iterItems(0)
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142
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diff changeset
143 @property
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144 def pages(self):
879fe1457e48 data: `Linker` refactor.
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145 return self._iterItems(0, filter_page_items)
227
d6d0e4976beb data: Make the `Linekr` use the new `getSettingAccessor` API.
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parents: 212
diff changeset
146
237
879fe1457e48 data: `Linker` refactor.
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diff changeset
147 @property
879fe1457e48 data: `Linker` refactor.
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diff changeset
148 def directories(self):
879fe1457e48 data: `Linker` refactor.
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diff changeset
149 return self._iterItems(0, filter_directory_items)
879fe1457e48 data: `Linker` refactor.
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parents: 227
diff changeset
150
879fe1457e48 data: `Linker` refactor.
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diff changeset
151 @property
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diff changeset
152 def all(self):
879fe1457e48 data: `Linker` refactor.
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diff changeset
153 return self._iterItems()
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parents: 227
diff changeset
154
879fe1457e48 data: `Linker` refactor.
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diff changeset
155 @property
879fe1457e48 data: `Linker` refactor.
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diff changeset
156 def allpages(self):
879fe1457e48 data: `Linker` refactor.
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diff changeset
157 return self._iterItems(-1, filter_page_items)
227
d6d0e4976beb data: Make the `Linekr` use the new `getSettingAccessor` API.
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parents: 212
diff changeset
158
237
879fe1457e48 data: `Linker` refactor.
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diff changeset
159 @property
879fe1457e48 data: `Linker` refactor.
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diff changeset
160 def alldirectories(self):
879fe1457e48 data: `Linker` refactor.
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diff changeset
161 return self._iterItems(-1, filter_directory_items)
879fe1457e48 data: `Linker` refactor.
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diff changeset
162
879fe1457e48 data: `Linker` refactor.
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diff changeset
163 @property
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diff changeset
164 def root(self):
879fe1457e48 data: `Linker` refactor.
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165 return self.forpath('/')
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diff changeset
166
879fe1457e48 data: `Linker` refactor.
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diff changeset
167 def forpath(self, rel_path):
247
d9d5c5de02a8 data: Add a top level wrapper for `Linker`.
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168 return Linker(self._source, self._root_page_path,
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diff changeset
169 name='.', dir_path=rel_path)
237
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diff changeset
170
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diff changeset
171 def _iterItems(self, max_depth=-1, filter_func=None):
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diff changeset
172 items = walk_linkers(self, max_depth=max_depth,
879fe1457e48 data: `Linker` refactor.
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diff changeset
173 filter_func=filter_func)
879fe1457e48 data: `Linker` refactor.
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diff changeset
174 src = LinkerSource(items, self._source)
227
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175 return PageIterator(src)
212
701591ebfcba data: Improve the Linker and RecursiveLinker features. Add tests.
Ludovic Chabant <ludovic@chabant.com>
parents: 172
diff changeset
176
237
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diff changeset
177 def _load(self):
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diff changeset
178 if self._items is not None:
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diff changeset
179 return
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diff changeset
180
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diff changeset
181 is_listable = isinstance(self._source, IListableSource)
879fe1457e48 data: `Linker` refactor.
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diff changeset
182 if not is_listable:
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diff changeset
183 raise Exception("Source '%s' can't be listed." % self._source.name)
879fe1457e48 data: `Linker` refactor.
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diff changeset
184
247
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diff changeset
185 if self._name is None:
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diff changeset
186 self._name = self._source.getBasename(self._root_page_path)
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diff changeset
187 if self._dir_path is None:
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diff changeset
188 self._dir_path = self._source.getDirpath(self._root_page_path)
237
879fe1457e48 data: `Linker` refactor.
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diff changeset
189
879fe1457e48 data: `Linker` refactor.
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diff changeset
190 if self._dir_path is None:
879fe1457e48 data: `Linker` refactor.
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diff changeset
191 raise Exception("This linker has no directory to start from.")
212
701591ebfcba data: Improve the Linker and RecursiveLinker features. Add tests.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
192
237
879fe1457e48 data: `Linker` refactor.
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diff changeset
193 items = list(self._source.listPath(self._dir_path))
879fe1457e48 data: `Linker` refactor.
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diff changeset
194 self._items = collections.OrderedDict()
879fe1457e48 data: `Linker` refactor.
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diff changeset
195 with self._source.app.env.page_repository.startBatchGet():
879fe1457e48 data: `Linker` refactor.
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diff changeset
196 for is_dir, name, data in items:
879fe1457e48 data: `Linker` refactor.
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diff changeset
197 # If `is_dir` is true, `data` will be the directory's source
879fe1457e48 data: `Linker` refactor.
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diff changeset
198 # path. If not, it will be a page factory.
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diff changeset
199 if is_dir:
247
d9d5c5de02a8 data: Add a top level wrapper for `Linker`.
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diff changeset
200 item = Linker(self._source, self._root_page_path,
237
879fe1457e48 data: `Linker` refactor.
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diff changeset
201 name=name, dir_path=data)
879fe1457e48 data: `Linker` refactor.
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diff changeset
202 else:
879fe1457e48 data: `Linker` refactor.
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diff changeset
203 item = data.buildPage()
247
d9d5c5de02a8 data: Add a top level wrapper for `Linker`.
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diff changeset
204 is_self = (item.rel_path == self._root_page_path)
237
879fe1457e48 data: `Linker` refactor.
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diff changeset
205 item.config.set('__linker_name', name)
247
d9d5c5de02a8 data: Add a top level wrapper for `Linker`.
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diff changeset
206 item.config.set('__linker_is_self', is_self)
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parents: 242
diff changeset
207 if is_self:
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diff changeset
208 self._self_item = item
237
879fe1457e48 data: `Linker` refactor.
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diff changeset
209
879fe1457e48 data: `Linker` refactor.
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diff changeset
210 existing = self._items.get(name)
879fe1457e48 data: `Linker` refactor.
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parents: 227
diff changeset
211 if existing is None:
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
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diff changeset
212 self._items[name] = item
879fe1457e48 data: `Linker` refactor.
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diff changeset
213 elif is_dir:
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
214 # The current item is a directory. The existing item
879fe1457e48 data: `Linker` refactor.
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diff changeset
215 # should be a page.
879fe1457e48 data: `Linker` refactor.
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diff changeset
216 existing.config.set('__linker_child', item)
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
217 else:
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
218 # The current item is a page. The existing item should
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
219 # be a directory.
879fe1457e48 data: `Linker` refactor.
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parents: 227
diff changeset
220 item.config.set('__linker_child', existing)
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
221 self._items[name] = item
172
4fc1d306046b linker: Actually implement the `Linker` class, and use it in the page data.
Ludovic Chabant <ludovic@chabant.com>
parents: 3
diff changeset
222
4fc1d306046b linker: Actually implement the `Linker` class, and use it in the page data.
Ludovic Chabant <ludovic@chabant.com>
parents: 3
diff changeset
223
237
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
224 def filter_page_items(item):
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
225 return not isinstance(item, Linker)
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
226
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
227
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
228 def filter_directory_items(item):
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
229 return isinstance(item, linker)
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
230
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
231
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
232 def walk_linkers(linker, depth=0, max_depth=-1, filter_func=None):
172
4fc1d306046b linker: Actually implement the `Linker` class, and use it in the page data.
Ludovic Chabant <ludovic@chabant.com>
parents: 3
diff changeset
233 linker._load()
237
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
234 for item in linker._items.values():
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
235 if not filter_func or filter_func(item):
172
4fc1d306046b linker: Actually implement the `Linker` class, and use it in the page data.
Ludovic Chabant <ludovic@chabant.com>
parents: 3
diff changeset
236 yield item
4fc1d306046b linker: Actually implement the `Linker` class, and use it in the page data.
Ludovic Chabant <ludovic@chabant.com>
parents: 3
diff changeset
237
237
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
238 if (isinstance(item, Linker) and
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
239 (max_depth < 0 or depth + 1 <= max_depth)):
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
240 yield from walk_linkers(item, depth + 1, max_depth)
879fe1457e48 data: `Linker` refactor.
Ludovic Chabant <ludovic@chabant.com>
parents: 227
diff changeset
241