Mercurial > piecrust2

annotate piecrust/data/paginationdata.py @ 828:bca06fc064c0

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Use assetor provided by page source when paginating
author Ben Artin <ben@artins.org>
date Sun, 01 Jan 2017 19:32:19 -0500
parents e35407c60e00
children a12ad254176e
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1 import time
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2 import logging
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3 from piecrust.data.assetor import Assetor
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4 from piecrust.data.pagedata import LazyPageConfigData
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5 from piecrust.routing import create_route_metadata
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6 from piecrust.uriutil import split_uri
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7
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8
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9 logger = logging.getLogger(__name__)
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10
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11
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12 class PaginationData(LazyPageConfigData):
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13 def __init__(self, page):
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14 super(PaginationData, self).__init__(page)
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15 self._route = None
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16 self._route_metadata = None
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17
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18 def _get_uri(self):
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19 page = self._page
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20 if self._route is None:
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21 # TODO: this is not quite correct, as we're missing parts of the
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22 # route metadata if the current page is a taxonomy page.
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23 route_metadata = create_route_metadata(page)
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24 self._route = page.app.getSourceRoute(page.source.name, route_metadata)
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25 self._route_metadata = route_metadata
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26 if self._route is None:
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27 raise Exception("Can't get route for page: %s" % page.path)
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28 return self._route.getUri(self._route_metadata)
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29
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30 def _load(self):
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31 page = self._page
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32 dt = page.datetime
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33 page_url = self._get_uri()
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34 _, slug = split_uri(page.app, page_url)
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35 self._setValue('url', page_url)
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36 self._setValue('slug', slug)
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37 self._setValue(
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38 'timestamp',
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39 time.mktime(page.datetime.timetuple()))
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40 self._setValue('datetime', {
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41 'year': dt.year, 'month': dt.month, 'day': dt.day,
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42 'hour': dt.hour, 'minute': dt.minute, 'second': dt.second})
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43 date_format = page.app.config.get('site/date_format')
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44 if date_format:
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45 self._setValue('date', page.datetime.strftime(date_format))
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46 self._setValue('mtime', page.path_mtime)
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47
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48 assetor = page.source.buildPageAssetor(page, page_url)
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49 self._setValue('assets', assetor)
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50
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51 segment_names = page.config.get('segments')
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52 for name in segment_names:
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53 self._mapLoader(name, self._load_rendered_segment)
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54
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55 def _load_rendered_segment(self, data, name):
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56 do_render = True
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57 eis = self._page.app.env.exec_info_stack
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58 if eis is not None and eis.hasPage(self._page):
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59 # This is the pagination data for the page that is currently
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60 # being rendered! Inception! But this is possible... so just
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61 # prevent infinite recursion.
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62 do_render = False
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63
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64 assert self is data
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65
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66 if do_render:
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67 uri = self._get_uri()
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68 try:
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69 from piecrust.rendering import (
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70 QualifiedPage, PageRenderingContext,
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71 render_page_segments)
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72 qp = QualifiedPage(self._page, self._route,
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73 self._route_metadata)
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74 ctx = PageRenderingContext(qp)
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75 render_result = render_page_segments(ctx)
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76 segs = render_result.segments
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77 except Exception as ex:
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78 logger.exception(ex)
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79 raise Exception(
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80 "Error rendering segments for '%s'" % uri) from ex
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81 else:
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82 segs = {}
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83 for name in self._page.config.get('segments'):
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84 segs[name] = "<unavailable: current page>"
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85
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86 for k, v in segs.items():
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87 self._unmapLoader(k)
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88 self._setValue(k, v)
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89
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90 if 'content.abstract' in segs:
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91 self._setValue('content', segs['content.abstract'])
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92 self._setValue('has_more', True)
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93 if name == 'content':
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94 return segs['content.abstract']
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95
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96 return segs[name]
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97