Mercurial > piecrust2

annotate piecrust/data/linker.py @ 990:22cf13b86cc3

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cm: Upgrade Garcon tasks to the latest PyInvoke version.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 19 Nov 2017 14:29:52 -0800
parents 8adc27285d93
children 7e4742a60d14
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1 import logging
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2 from piecrust.data.paginationdata import PaginationData
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3 from piecrust.sources.base import (
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4 REL_PARENT_GROUP, REL_LOGICAL_PARENT_ITEM, REL_LOGICAl_CHILD_GROUP)
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5
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6
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7 logger = logging.getLogger(__name__)
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8
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9
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10 _unloaded = object()
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11
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12
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13 class Linker:
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14 """ A template-exposed data class that lets the user navigate the
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15 logical hierarchy of pages in a page source.
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16 """
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17 debug_render = ['parent', 'ancestors', 'siblings', 'children', 'root',
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18 'forpath']
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19 debug_render_invoke = ['parent', 'ancestors', 'siblings', 'children',
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20 'root']
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21 debug_render_redirect = {
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22 'ancestors': '_debugRenderAncestors',
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23 'siblings': '_debugRenderSiblings',
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24 'children': '_debugRenderChildren',
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25 'root': '_debugRenderRoot'}
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26
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27 def __init__(self, source, content_item):
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28 self._source = source
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29 self._content_item = content_item
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30
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31 self._parent_group = _unloaded
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32 self._ancestors = None
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33 self._siblings = None
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34 self._children = None
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35
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36 @property
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37 def parent(self):
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38 a = self.ancestors
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39 if a:
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40 return a[0]
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41 return None
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42
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43 @property
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44 def ancestors(self):
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45 if self._ancestors is None:
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46 src = self._source
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47 app = src.app
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48
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49 self._ancestors = []
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50 cur_group = self._getParentGroup()
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51 while cur_group:
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52 pi = src.getRelatedContents(cur_group,
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53 REL_LOGICAL_PARENT_ITEM)
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54 if pi is not None:
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55 pipage = app.getPage(src, pi)
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56 self._ancestors.append(PaginationData(pipage))
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57 cur_group = src.getRelatedContents(
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58 pi, REL_PARENT_GROUP)
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59 else:
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60 break
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61 return self._ancestors
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62
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63 @property
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64 def siblings(self):
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65 src = self._source
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66 app = src.app
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67 for i in self._getAllSiblings():
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68 if not i.is_group:
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69 ipage = app.getPage(src, i)
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70 ipage_data = PaginationData(ipage)
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71 ipage_data._setValue('is_self',
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72 i.spec == self._content_item.spec)
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73 yield ipage_data
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74
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75 @property
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76 def children(self):
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77 src = self._source
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78 app = src.app
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79 for i in self._getAllChildren():
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80 if not i.is_group:
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81 ipage = app.getPage(src, i)
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82 yield PaginationData(ipage)
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83
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84 def forpath(self, path):
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85 # TODO: generalize this for sources that aren't file-system based.
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86 item = self._source.findContentFromSpec({'slug': path})
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87 return Linker(self._source, item)
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88
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89 def childrenof(self, path):
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90 # TODO: generalize this for sources that aren't file-system based.
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91 src = self._source
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92 app = src.app
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93 group = src.findContentFromSpec(path)
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94 if group is not None:
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95 if not group.is_group:
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96 raise Exception("'%s' is not a folder/group." % path)
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97 for i in src.getContents(group):
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98 if not i.is_group:
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99 ipage = app.getPage(src, i)
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100 yield PaginationData(ipage)
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101 return None
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102
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103 def _getAllSiblings(self):
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104 if self._siblings is None:
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105 self._siblings = list(self._source.getContents(
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106 self._getParentGroup()))
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107 return self._siblings
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108
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109 def _getAllChildren(self):
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110 if self._children is None:
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111 child_group = self._source.getRelatedContents(
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112 self._content_item, REL_LOGICAl_CHILD_GROUP)
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113 if child_group is not None:
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114 self._children = list(
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115 self._source.getContents(child_group))
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116 else:
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117 self._children = []
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118 return self._children
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119
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120 def _getParentGroup(self):
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121 if self._parent_group is _unloaded:
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122 self._parent_group = self._source.getRelatedContents(
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123 self._content_item, REL_PARENT_GROUP)
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124 return self._parent_group
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125
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126 def _debugRenderAncestors(self):
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127 return [i.title for i in self.ancestors]
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128
3cca1f6bd610 debug: Fix how the linker shows children/siblings/etc. in the debug window.
Ludovic Chabant <ludovic@chabant.com>
parents: 518
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129 def _debugRenderSiblings(self):
866
d9059257743c refactor: Make the linker work again.
Ludovic Chabant <ludovic@chabant.com>
parents: 862
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130 return [i.title for i in self.siblings]
590
3cca1f6bd610 debug: Fix how the linker shows children/siblings/etc. in the debug window.
Ludovic Chabant <ludovic@chabant.com>
parents: 518
diff changeset
131
3cca1f6bd610 debug: Fix how the linker shows children/siblings/etc. in the debug window.
Ludovic Chabant <ludovic@chabant.com>
parents: 518
diff changeset
132 def _debugRenderChildren(self):
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d9059257743c refactor: Make the linker work again.
Ludovic Chabant <ludovic@chabant.com>
parents: 862
diff changeset
133 return [i.title for i in self.children]
590
3cca1f6bd610 debug: Fix how the linker shows children/siblings/etc. in the debug window.
Ludovic Chabant <ludovic@chabant.com>
parents: 518
diff changeset
134