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annotate piecrust/rendering.py @ 342:d8677ad748f0

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chef: Fix pre-parsing.
author Ludovic Chabant <ludovic@chabant.com>
date Mon, 06 Apr 2015 22:28:03 -0700
parents 938be93215cb
children 4b1019bb2533
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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 piecrust.data.builder import (DataBuildingContext, build_page_data,
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5 build_layout_data)
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6 from piecrust.data.filters import (
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7 PaginationFilter, HasFilterClause, IsFilterClause, AndBooleanClause,
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8 page_value_accessor)
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9 from piecrust.sources.base import PageSource
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10 from piecrust.templating.base import TemplateNotFoundError, TemplatingError
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12
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13 logger = logging.getLogger(__name__)
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15
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16 content_abstract_re = re.compile(r'^<!--\s*(more|(page)?break)\s*-->\s*$',
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17 re.MULTILINE)
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19
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20 class PageRenderingError(Exception):
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21 pass
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23
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24 class TemplateEngineNotFound(Exception):
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25 pass
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27
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28 class RenderedPage(object):
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29 def __init__(self, page, uri, num=1):
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30 self.page = page
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31 self.uri = uri
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32 self.num = num
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33 self.data = None
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34 self.content = None
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35
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36 @property
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37 def app(self):
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38 return self.page.app
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41 PASS_NONE = 0
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42 PASS_FORMATTING = 1
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43 PASS_RENDERING = 2
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46 RENDER_PASSES = [PASS_FORMATTING, PASS_RENDERING]
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47
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48
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49 class RenderPassInfo(object):
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50 def __init__(self):
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51 self.used_source_names = set()
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52 self.used_taxonomy_terms = set()
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53
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54
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55 class PageRenderingContext(object):
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56 def __init__(self, page, uri, page_num=1, force_render=False):
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57 self.page = page
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58 self.uri = uri
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59 self.page_num = page_num
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60 self.force_render = force_render
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61 self.pagination_source = None
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62 self.pagination_filter = None
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63 self.custom_data = None
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64 self._current_pass = PASS_NONE
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65
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66 self.render_passes = {}
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67 self.used_pagination = None
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68 self.used_assets = None
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70 @property
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71 def app(self):
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72 return self.page.app
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73
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74 @property
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75 def source_metadata(self):
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76 return self.page.source_metadata
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77
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78 @property
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79 def current_pass_info(self):
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80 return self.render_passes.get(self._current_pass)
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81
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82 def setCurrentPass(self, rdr_pass):
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83 if rdr_pass != PASS_NONE:
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84 self.render_passes.setdefault(rdr_pass, RenderPassInfo())
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85 self._current_pass = rdr_pass
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86
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87 def setPagination(self, paginator):
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88 self._raiseIfNoCurrentPass()
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89 if self.used_pagination is not None:
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90 raise Exception("Pagination has already been used.")
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91 self.used_pagination = paginator
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92 self.addUsedSource(paginator._source)
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93
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94 def addUsedSource(self, source):
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95 self._raiseIfNoCurrentPass()
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96 if isinstance(source, PageSource):
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97 pass_info = self.render_passes[self._current_pass]
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98 pass_info.used_source_names.add(source.name)
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99
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100 def setTaxonomyFilter(self, taxonomy, term_value):
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101 is_combination = isinstance(term_value, tuple)
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102 flt = PaginationFilter(value_accessor=page_value_accessor)
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103 if taxonomy.is_multiple:
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104 if is_combination:
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105 abc = AndBooleanClause()
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106 for t in term_value:
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107 abc.addClause(HasFilterClause(taxonomy.setting_name, t))
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108 flt.addClause(abc)
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109 else:
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110 flt.addClause(
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111 HasFilterClause(taxonomy.setting_name, term_value))
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112 else:
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113 flt.addClause(IsFilterClause(taxonomy.setting_name, term_value))
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114 self.pagination_filter = flt
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115
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116 self.custom_data = {
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117 taxonomy.term_name: term_value,
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118 'is_multiple_%s' % taxonomy.term_name: is_combination}
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119
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120 def _raiseIfNoCurrentPass(self):
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121 if self._current_pass == PASS_NONE:
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122 raise Exception("No rendering pass is currently active.")
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123
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124
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125 def render_page(ctx):
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126 eis = ctx.app.env.exec_info_stack
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127 eis.pushPage(ctx.page, ctx)
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128 try:
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129 page = ctx.page
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130
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131 # Build the data for both segment and layout rendering.
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132 data_ctx = DataBuildingContext(page, ctx.uri, ctx.page_num)
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133 data_ctx.pagination_source = ctx.pagination_source
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134 data_ctx.pagination_filter = ctx.pagination_filter
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135 page_data = build_page_data(data_ctx)
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136 if ctx.custom_data:
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137 page_data.update(ctx.custom_data)
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138
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139 # Render content segments.
338
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diff changeset
140 ctx.setCurrentPass(PASS_FORMATTING)
3
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141 repo = ctx.app.env.rendered_segments_repository
174
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diff changeset
142 if repo and not ctx.force_render:
334
b034f6f15e22 bake: Several bug taxonomy-related fixes for incorrect incremental bakes.
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diff changeset
143 cache_key = ctx.uri
49
fce061f8c2ed Fix cache validation issue with rendered segments, limit disk access.
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diff changeset
144 page_time = page.path_mtime
158
1187739e5a19 Fix some indentation and line lengths.
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diff changeset
145 contents = repo.get(
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diff changeset
146 cache_key,
49
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diff changeset
147 lambda: _do_render_page_segments(page, page_data),
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diff changeset
148 fs_cache_time=page_time)
3
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149 else:
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150 contents = _do_render_page_segments(page, page_data)
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151
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152 # Render layout.
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diff changeset
153 ctx.setCurrentPass(PASS_RENDERING)
3
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154 layout_name = page.config.get('layout')
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155 if layout_name is None:
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156 layout_name = page.source.config.get('default_layout', 'default')
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157 null_names = ['', 'none', 'nil']
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158 if layout_name not in null_names:
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159 layout_data = build_layout_data(page, page_data, contents)
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160 output = render_layout(layout_name, page, layout_data)
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161 else:
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162 output = contents['content']
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163
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164 rp = RenderedPage(page, ctx.uri, ctx.page_num)
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165 rp.data = page_data
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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166 rp.content = output
3
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167 return rp
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168 finally:
338
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diff changeset
169 ctx.setCurrentPass(PASS_NONE)
3
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170 eis.popPage()
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171
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172
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173 def render_page_segments(ctx):
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174 repo = ctx.app.env.rendered_segments_repository
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175 if repo:
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176 cache_key = '%s:%s' % (ctx.uri, ctx.page_num)
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177 return repo.get(cache_key,
50
2fec3ee1298f Properly override pages between realms.
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diff changeset
178 lambda: _do_render_page_segments_from_ctx(ctx),
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diff changeset
179 fs_cache_time=ctx.page.path_mtime)
3
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180
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181 return _do_render_page_segments_from_ctx(ctx)
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182
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183
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184 def _do_render_page_segments_from_ctx(ctx):
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185 eis = ctx.app.env.exec_info_stack
96
0445a2232de7 Improvements and fixes to incremental baking.
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diff changeset
186 eis.pushPage(ctx.page, ctx)
338
938be93215cb bake: Improve render context and bake record, fix incremental bake bugs.
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diff changeset
187 ctx.setCurrentPass(PASS_FORMATTING)
3
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188 try:
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189 data_ctx = DataBuildingContext(ctx.page, ctx.uri, ctx.page_num)
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190 page_data = build_page_data(data_ctx)
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191 return _do_render_page_segments(ctx.page, page_data)
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192 finally:
338
938be93215cb bake: Improve render context and bake record, fix incremental bake bugs.
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diff changeset
193 ctx.setCurrentPass(PASS_NONE)
3
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194 eis.popPage()
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195
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196
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197 def _do_render_page_segments(page, page_data):
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198 app = page.app
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199 engine_name = page.config.get('template_engine')
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200 format_name = page.config.get('format')
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diff changeset
201
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202 engine = get_template_engine(app, engine_name)
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diff changeset
203
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diff changeset
204 formatted_content = {}
5
474c9882decf Upgrade to Python 3.
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diff changeset
205 for seg_name, seg in page.raw_content.items():
474c9882decf Upgrade to Python 3.
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diff changeset
206 seg_text = ''
3
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207 for seg_part in seg.parts:
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diff changeset
208 part_format = seg_part.fmt or format_name
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
209 try:
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diff changeset
210 part_text = engine.renderString(
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diff changeset
211 seg_part.content, page_data,
28444014ce7d Fix error reporting and counting of lines.
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diff changeset
212 filename=page.path)
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parents: 96
diff changeset
213 except TemplatingError as err:
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diff changeset
214 err.lineno += seg_part.line
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diff changeset
215 raise err
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diff changeset
216
3
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diff changeset
217 part_text = format_text(app, part_format, part_text)
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diff changeset
218 seg_text += part_text
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diff changeset
219 formatted_content[seg_name] = seg_text
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diff changeset
220
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diff changeset
221 if seg_name == 'content':
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diff changeset
222 m = content_abstract_re.search(seg_text)
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diff changeset
223 if m:
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diff changeset
224 offset = m.start()
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diff changeset
225 content_abstract = seg_text[:offset]
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diff changeset
226 formatted_content['content.abstract'] = content_abstract
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diff changeset
227
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diff changeset
228 return formatted_content
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229
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diff changeset
230
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diff changeset
231 def render_layout(layout_name, page, layout_data):
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232 names = layout_name.split(',')
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diff changeset
233 default_template_engine = get_template_engine(page.app, None)
183
fff195335d0a render: When a template engine can't be found, show the correct name in the error.
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parents: 174
diff changeset
234 default_exts = ['.' + e.lstrip('.')
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parents: 174
diff changeset
235 for e in default_template_engine.EXTENSIONS]
3
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diff changeset
236 full_names = []
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237 for name in names:
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238 if '.' not in name:
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239 for ext in default_exts:
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240 full_names.append(name + ext)
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241 else:
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242 full_names.append(name)
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243
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diff changeset
244 _, engine_name = os.path.splitext(full_names[0])
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diff changeset
245 engine_name = engine_name.lstrip('.')
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246 engine = get_template_engine(page.app, engine_name)
183
fff195335d0a render: When a template engine can't be found, show the correct name in the error.
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parents: 174
diff changeset
247
153
1c3d229158ba Make a nice error message when a layout hasn't been found.
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diff changeset
248 try:
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diff changeset
249 output = engine.renderFile(full_names, layout_data)
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parents: 128
diff changeset
250 except TemplateNotFoundError as ex:
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diff changeset
251 msg = "Can't find template for page: %s\n" % page.path
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diff changeset
252 msg += "Looked for: %s" % ', '.join(full_names)
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diff changeset
253 raise Exception(msg) from ex
3
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254 return output
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255
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256
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257 def get_template_engine(app, engine_name):
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258 if engine_name == 'html':
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259 engine_name = None
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260 engine_name = engine_name or app.config.get('site/default_template_engine')
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261 for engine in app.plugin_loader.getTemplateEngines():
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262 if engine_name in engine.ENGINE_NAMES:
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263 return engine
183
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264 raise TemplateEngineNotFound("No such template engine: %s" % engine_name)
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265
3
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266
128
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267 def format_text(app, format_name, txt, exact_format=False):
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268 if exact_format and not format_name:
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269 raise Exception("You need to specify a format name.")
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270
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271 format_count = 0
3
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272 format_name = format_name or app.config.get('site/default_format')
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273 for fmt in app.plugin_loader.getFormatters():
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274 if fmt.FORMAT_NAMES is None or format_name in fmt.FORMAT_NAMES:
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275 txt = fmt.render(format_name, txt)
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276 format_count += 1
3
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277 if fmt.OUTPUT_FORMAT is not None:
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278 format_name = fmt.OUTPUT_FORMAT
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279 if exact_format and format_count == 0:
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280 raise Exception("No such format: %s" % format_name)
3
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281 return txt
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282