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annotate piecrust/rendering.py @ 413:eacf0a3afd0c

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internal: Register performance timers for plugin components.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 20 Jun 2015 19:16:38 -0700
parents e7b865f8f335
children 0e9a94b7fdfa
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3
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1 import re
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2 import os.path
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3 import logging
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4 from werkzeug.utils import cached_property
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5 from piecrust.data.builder import (
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6 DataBuildingContext, build_page_data, build_layout_data)
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7 from piecrust.data.filters import (
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8 PaginationFilter, HasFilterClause, IsFilterClause, AndBooleanClause,
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9 page_value_accessor)
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10 from piecrust.sources.base import PageSource
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11 from piecrust.templating.base import TemplateNotFoundError, TemplatingError
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13
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14 logger = logging.getLogger(__name__)
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15
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16
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17 content_abstract_re = re.compile(r'^<!--\s*(more|(page)?break)\s*-->\s*$',
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18 re.MULTILINE)
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20
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21 class PageRenderingError(Exception):
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22 pass
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24
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25 class TemplateEngineNotFound(Exception):
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26 pass
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28
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29 class QualifiedPage(object):
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30 def __init__(self, page, route, route_metadata):
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31 self.page = page
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32 self.route = route
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33 self.route_metadata = route_metadata
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34
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35 def getUri(self, sub_num=1):
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36 return self.route.getUri(self.route_metadata, provider=self.page,
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37 sub_num=sub_num)
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38
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39 def __getattr__(self, name):
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40 return getattr(self.page, name)
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41
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42
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43 class RenderedPage(object):
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44 def __init__(self, page, uri, num=1):
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45 self.page = page
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46 self.uri = uri
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47 self.num = num
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48 self.data = None
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49 self.content = None
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50
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51 @property
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52 def app(self):
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53 return self.page.app
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56 PASS_NONE = 0
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57 PASS_FORMATTING = 1
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58 PASS_RENDERING = 2
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61 RENDER_PASSES = [PASS_FORMATTING, PASS_RENDERING]
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63
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64 class RenderPassInfo(object):
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65 def __init__(self):
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66 self.used_source_names = set()
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67 self.used_taxonomy_terms = set()
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69
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70 class PageRenderingContext(object):
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71 def __init__(self, qualified_page, page_num=1, force_render=False):
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72 self.page = qualified_page
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73 self.page_num = page_num
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74 self.force_render = force_render
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75 self.pagination_source = None
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76 self.pagination_filter = None
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77 self.custom_data = None
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78 self._current_pass = PASS_NONE
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79
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80 self.render_passes = {}
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81 self.used_pagination = None
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82 self.used_assets = None
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83
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84 @property
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85 def app(self):
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86 return self.page.app
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87
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88 @property
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89 def source_metadata(self):
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90 return self.page.source_metadata
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91
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92 @cached_property
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93 def uri(self):
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94 return self.page.getUri(self.page_num)
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95
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96 @property
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97 def pagination_has_more(self):
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98 if self.used_pagination is None:
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99 return False
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100 return self.used_pagination.has_more
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101
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102 @property
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103 def current_pass_info(self):
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104 return self.render_passes.get(self._current_pass)
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105
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106 def setCurrentPass(self, rdr_pass):
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107 if rdr_pass != PASS_NONE:
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108 self.render_passes.setdefault(rdr_pass, RenderPassInfo())
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109 self._current_pass = rdr_pass
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110
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111 def setPagination(self, paginator):
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112 self._raiseIfNoCurrentPass()
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113 if self.used_pagination is not None:
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114 raise Exception("Pagination has already been used.")
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115 self.used_pagination = paginator
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116 self.addUsedSource(paginator._source)
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117
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118 def addUsedSource(self, source):
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119 self._raiseIfNoCurrentPass()
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120 if isinstance(source, PageSource):
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121 pass_info = self.render_passes[self._current_pass]
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122 pass_info.used_source_names.add(source.name)
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123
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124 def setTaxonomyFilter(self, taxonomy, term_value):
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125 is_combination = isinstance(term_value, tuple)
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126 flt = PaginationFilter(value_accessor=page_value_accessor)
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127 if taxonomy.is_multiple:
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128 if is_combination:
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129 abc = AndBooleanClause()
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130 for t in term_value:
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131 abc.addClause(HasFilterClause(taxonomy.setting_name, t))
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132 flt.addClause(abc)
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133 else:
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134 flt.addClause(
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135 HasFilterClause(taxonomy.setting_name, term_value))
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136 else:
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137 flt.addClause(IsFilterClause(taxonomy.setting_name, term_value))
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138 self.pagination_filter = flt
334
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diff changeset
139
324
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diff changeset
140 self.custom_data = {
334
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141 taxonomy.term_name: term_value,
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142 'is_multiple_%s' % taxonomy.term_name: is_combination}
324
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diff changeset
143
338
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diff changeset
144 def _raiseIfNoCurrentPass(self):
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diff changeset
145 if self._current_pass == PASS_NONE:
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146 raise Exception("No rendering pass is currently active.")
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147
3
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148
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149 def render_page(ctx):
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150 eis = ctx.app.env.exec_info_stack
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151 eis.pushPage(ctx.page, ctx)
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152 try:
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153 page = ctx.page
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154
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155 # Build the data for both segment and layout rendering.
369
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156 data_ctx = DataBuildingContext(page, page_num=ctx.page_num)
3
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157 data_ctx.pagination_source = ctx.pagination_source
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158 data_ctx.pagination_filter = ctx.pagination_filter
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159 page_data = build_page_data(data_ctx)
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160 if ctx.custom_data:
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161 page_data.update(ctx.custom_data)
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162
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163 # Render content segments.
338
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164 ctx.setCurrentPass(PASS_FORMATTING)
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165 repo = ctx.app.env.rendered_segments_repository
411
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166 save_to_fs = True
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167 if ctx.app.env.fs_cache_only_for_main_page and not eis.is_main_page:
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168 save_to_fs = False
174
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diff changeset
169 if repo and not ctx.force_render:
158
1187739e5a19 Fix some indentation and line lengths.
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diff changeset
170 contents = repo.get(
411
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diff changeset
171 ctx.uri,
49
fce061f8c2ed Fix cache validation issue with rendered segments, limit disk access.
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diff changeset
172 lambda: _do_render_page_segments(page, page_data),
411
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173 fs_cache_time=page.path_mtime,
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diff changeset
174 save_to_fs=save_to_fs)
3
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175 else:
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176 contents = _do_render_page_segments(page, page_data)
411
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diff changeset
177 if repo:
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178 repo.put(ctx.uri, contents, save_to_fs)
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179
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180 # Render layout.
338
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diff changeset
181 ctx.setCurrentPass(PASS_RENDERING)
3
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182 layout_name = page.config.get('layout')
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183 if layout_name is None:
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184 layout_name = page.source.config.get('default_layout', 'default')
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185 null_names = ['', 'none', 'nil']
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186 if layout_name not in null_names:
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diff changeset
187 build_layout_data(page, page_data, contents)
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diff changeset
188 output = render_layout(layout_name, page, page_data)
3
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189 else:
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190 output = contents['content']
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191
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192 rp = RenderedPage(page, ctx.uri, ctx.page_num)
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193 rp.data = page_data
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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diff changeset
194 rp.content = output
3
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195 return rp
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196 finally:
338
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diff changeset
197 ctx.setCurrentPass(PASS_NONE)
3
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198 eis.popPage()
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199
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200
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201 def render_page_segments(ctx):
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diff changeset
202 repo = ctx.app.env.rendered_segments_repository
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203 if repo:
369
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diff changeset
204 cache_key = ctx.uri
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diff changeset
205 return repo.get(
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diff changeset
206 cache_key,
50
2fec3ee1298f Properly override pages between realms.
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diff changeset
207 lambda: _do_render_page_segments_from_ctx(ctx),
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diff changeset
208 fs_cache_time=ctx.page.path_mtime)
3
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209
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210 return _do_render_page_segments_from_ctx(ctx)
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211
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212
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diff changeset
213 def _do_render_page_segments_from_ctx(ctx):
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214 eis = ctx.app.env.exec_info_stack
96
0445a2232de7 Improvements and fixes to incremental baking.
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diff changeset
215 eis.pushPage(ctx.page, ctx)
338
938be93215cb bake: Improve render context and bake record, fix incremental bake bugs.
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diff changeset
216 ctx.setCurrentPass(PASS_FORMATTING)
3
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diff changeset
217 try:
369
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diff changeset
218 data_ctx = DataBuildingContext(ctx.page, page_num=ctx.page_num)
3
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219 page_data = build_page_data(data_ctx)
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220 return _do_render_page_segments(ctx.page, page_data)
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221 finally:
338
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diff changeset
222 ctx.setCurrentPass(PASS_NONE)
3
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diff changeset
223 eis.popPage()
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224
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225
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226 def _do_render_page_segments(page, page_data):
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diff changeset
227 app = page.app
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228 engine_name = page.config.get('template_engine')
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diff changeset
229 format_name = page.config.get('format')
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diff changeset
230
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231 engine = get_template_engine(app, engine_name)
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232
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233 formatted_content = {}
5
474c9882decf Upgrade to Python 3.
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diff changeset
234 for seg_name, seg in page.raw_content.items():
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diff changeset
235 seg_text = ''
3
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diff changeset
236 for seg_part in seg.parts:
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diff changeset
237 part_format = seg_part.fmt or format_name
128
28444014ce7d Fix error reporting and counting of lines.
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diff changeset
238 try:
411
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diff changeset
239 with app.env.timerScope(engine.__class__.__name__):
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diff changeset
240 part_text = engine.renderString(
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diff changeset
241 seg_part.content, page_data,
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diff changeset
242 filename=page.path)
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
243 except TemplatingError as err:
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diff changeset
244 err.lineno += seg_part.line
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diff changeset
245 raise err
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diff changeset
246
3
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247 part_text = format_text(app, part_format, part_text)
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diff changeset
248 seg_text += part_text
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249 formatted_content[seg_name] = seg_text
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diff changeset
250
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251 if seg_name == 'content':
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diff changeset
252 m = content_abstract_re.search(seg_text)
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diff changeset
253 if m:
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diff changeset
254 offset = m.start()
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diff changeset
255 content_abstract = seg_text[:offset]
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diff changeset
256 formatted_content['content.abstract'] = content_abstract
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parents:
diff changeset
257
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diff changeset
258 return formatted_content
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259
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diff changeset
260
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261 def render_layout(layout_name, page, layout_data):
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262 names = layout_name.split(',')
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263 default_template_engine = get_template_engine(page.app, None)
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264 default_exts = ['.' + e.lstrip('.')
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265 for e in default_template_engine.EXTENSIONS]
3
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266 full_names = []
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267 for name in names:
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268 if '.' not in name:
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269 for ext in default_exts:
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270 full_names.append(name + ext)
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271 else:
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272 full_names.append(name)
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273
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274 _, engine_name = os.path.splitext(full_names[0])
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275 engine_name = engine_name.lstrip('.')
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276 engine = get_template_engine(page.app, engine_name)
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277
153
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278 try:
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279 output = engine.renderFile(full_names, layout_data)
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280 except TemplateNotFoundError as ex:
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281 msg = "Can't find template for page: %s\n" % page.path
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282 msg += "Looked for: %s" % ', '.join(full_names)
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283 raise Exception(msg) from ex
3
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284 return output
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285
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286
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287 def get_template_engine(app, engine_name):
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288 if engine_name == 'html':
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289 engine_name = None
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290 engine_name = engine_name or app.config.get('site/default_template_engine')
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291 for engine in app.plugin_loader.getTemplateEngines():
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292 if engine_name in engine.ENGINE_NAMES:
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293 return engine
183
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294 raise TemplateEngineNotFound("No such template engine: %s" % engine_name)
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295
3
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296
128
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297 def format_text(app, format_name, txt, exact_format=False):
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298 if exact_format and not format_name:
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299 raise Exception("You need to specify a format name.")
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300
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301 format_count = 0
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302 format_name = format_name or app.config.get('site/default_format')
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303 for fmt in app.plugin_loader.getFormatters():
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304 if fmt.FORMAT_NAMES is None or format_name in fmt.FORMAT_NAMES:
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305 with app.env.timerScope(fmt.__class__.__name__):
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306 txt = fmt.render(format_name, txt)
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307 format_count += 1
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308 if fmt.OUTPUT_FORMAT is not None:
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309 format_name = fmt.OUTPUT_FORMAT
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310 if exact_format and format_count == 0:
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311 raise Exception("No such format: %s" % format_name)
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312 return txt
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313