Mercurial > piecrust2

annotate piecrust/rendering.py @ 427:3b658190c02b

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performance: Compute default layout extensions only once.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 26 Jun 2015 09:51:06 -0700
parents 6801ad5aa1d4
children 21e26ed867b6
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1 import re
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2 import os.path
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3 import copy
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4 import logging
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5 from werkzeug.utils import cached_property
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6 from piecrust.data.builder import (
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7 DataBuildingContext, build_page_data, build_layout_data)
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8 from piecrust.data.filters import (
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9 PaginationFilter, HasFilterClause, IsFilterClause, AndBooleanClause,
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10 page_value_accessor)
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11 from piecrust.sources.base import PageSource
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12 from piecrust.templating.base import TemplateNotFoundError, TemplatingError
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15 logger = logging.getLogger(__name__)
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17
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18 content_abstract_re = re.compile(r'^<!--\s*(more|(page)?break)\s*-->\s*$',
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19 re.MULTILINE)
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22 class PageRenderingError(Exception):
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23 pass
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26 class TemplateEngineNotFound(Exception):
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27 pass
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29
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30 class QualifiedPage(object):
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31 def __init__(self, page, route, route_metadata):
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32 self.page = page
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33 self.route = route
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34 self.route_metadata = route_metadata
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35
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36 def getUri(self, sub_num=1):
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37 return self.route.getUri(self.route_metadata, provider=self.page,
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38 sub_num=sub_num)
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39
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40 def __getattr__(self, name):
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41 return getattr(self.page, name)
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42
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43
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44 class RenderedSegments(object):
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45 def __init__(self, segments, render_pass_info):
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46 self.segments = segments
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47 self.render_pass_info = render_pass_info
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48
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49
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50 class RenderedLayout(object):
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51 def __init__(self, content, render_pass_info):
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52 self.content = content
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53 self.render_pass_info = render_pass_info
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54
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55
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56 class RenderedPage(object):
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57 def __init__(self, page, uri, num=1):
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58 self.page = page
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59 self.uri = uri
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60 self.num = num
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61 self.data = None
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62 self.content = None
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63 self.render_info = None
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64
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65 @property
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66 def app(self):
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67 return self.page.app
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68
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69 def copyRenderInfo(self):
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70 return copy.deepcopy(self.render_info)
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71
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73 PASS_NONE = 0
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74 PASS_FORMATTING = 1
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75 PASS_RENDERING = 2
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78 RENDER_PASSES = [PASS_FORMATTING, PASS_RENDERING]
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80
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81 class RenderPassInfo(object):
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82 def __init__(self):
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83 self.used_source_names = set()
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84 self.used_taxonomy_terms = set()
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85 self.used_pagination = False
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86 self.pagination_has_more = False
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87 self.used_assets = False
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88
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89 def merge(self, other):
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90 self.used_source_names |= other.used_source_names
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91 self.used_taxonomy_terms |= other.used_taxonomy_terms
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92 self.used_pagination = self.used_pagination or other.used_pagination
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93 self.pagination_has_more = (self.pagination_has_more or
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94 other.pagination_has_more)
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95 self.used_assets = self.used_assets or other.used_assets
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96
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97 def _toJson(self):
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98 data = {
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99 'used_source_names': list(self.used_source_names),
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100 'used_taxonomy_terms': list(self.used_taxonomy_terms),
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101 'used_pagination': self.used_pagination,
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102 'pagination_has_more': self.pagination_has_more,
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103 'used_assets': self.used_assets}
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104 return data
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105
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106 @staticmethod
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107 def _fromJson(data):
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108 assert data is not None
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109 rpi = RenderPassInfo()
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110 rpi.used_source_names = set(data['used_source_names'])
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111 for i in data['used_taxonomy_terms']:
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112 terms = i[2]
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113 if isinstance(terms, list):
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114 terms = tuple(terms)
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115 rpi.used_taxonomy_terms.add((i[0], i[1], terms))
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116 rpi.used_pagination = data['used_pagination']
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117 rpi.pagination_has_more = data['pagination_has_more']
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118 rpi.used_assets = data['used_assets']
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119 return rpi
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121
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122 class PageRenderingContext(object):
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123 def __init__(self, qualified_page, page_num=1, force_render=False):
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124 self.page = qualified_page
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125 self.page_num = page_num
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126 self.force_render = force_render
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127 self.pagination_source = None
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128 self.pagination_filter = None
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129 self.custom_data = None
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130 self._current_pass = PASS_NONE
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131
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132 self.render_passes = {}
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133
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134 @property
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135 def app(self):
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136 return self.page.app
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137
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138 @property
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139 def source_metadata(self):
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140 return self.page.source_metadata
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141
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142 @cached_property
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143 def uri(self):
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144 return self.page.getUri(self.page_num)
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145
338
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146 @property
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147 def current_pass_info(self):
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148 return self.render_passes.get(self._current_pass)
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149
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150 def setCurrentPass(self, rdr_pass):
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151 if rdr_pass != PASS_NONE:
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152 self.render_passes.setdefault(rdr_pass, RenderPassInfo())
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153 self._current_pass = rdr_pass
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154
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155 def setPagination(self, paginator):
338
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156 self._raiseIfNoCurrentPass()
415
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157 pass_info = self.current_pass_info
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158 if pass_info.used_pagination:
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159 raise Exception("Pagination has already been used.")
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160 assert paginator.is_loaded
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161 pass_info.used_pagination = True
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162 pass_info.pagination_has_more = paginator.has_more
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163 self.addUsedSource(paginator._source)
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164
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165 def addUsedSource(self, source):
338
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166 self._raiseIfNoCurrentPass()
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167 if isinstance(source, PageSource):
415
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168 pass_info = self.current_pass_info
338
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169 pass_info.used_source_names.add(source.name)
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170
324
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171 def setTaxonomyFilter(self, taxonomy, term_value):
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172 is_combination = isinstance(term_value, tuple)
324
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173 flt = PaginationFilter(value_accessor=page_value_accessor)
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174 if taxonomy.is_multiple:
334
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175 if is_combination:
324
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176 abc = AndBooleanClause()
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177 for t in term_value:
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178 abc.addClause(HasFilterClause(taxonomy.setting_name, t))
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179 flt.addClause(abc)
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180 else:
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181 flt.addClause(
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182 HasFilterClause(taxonomy.setting_name, term_value))
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183 else:
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184 flt.addClause(IsFilterClause(taxonomy.setting_name, term_value))
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185 self.pagination_filter = flt
334
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diff changeset
186
324
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diff changeset
187 self.custom_data = {
334
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188 taxonomy.term_name: term_value,
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189 'is_multiple_%s' % taxonomy.term_name: is_combination}
324
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diff changeset
190
338
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diff changeset
191 def _raiseIfNoCurrentPass(self):
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192 if self._current_pass == PASS_NONE:
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193 raise Exception("No rendering pass is currently active.")
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194
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195
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196 def render_page(ctx):
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197 eis = ctx.app.env.exec_info_stack
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198 eis.pushPage(ctx.page, ctx)
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199 try:
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200 # Build the data for both segment and layout rendering.
415
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201 page_data = _build_render_data(ctx)
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202
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203 # Render content segments.
338
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diff changeset
204 ctx.setCurrentPass(PASS_FORMATTING)
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205 repo = ctx.app.env.rendered_segments_repository
411
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diff changeset
206 save_to_fs = True
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diff changeset
207 if ctx.app.env.fs_cache_only_for_main_page and not eis.is_main_page:
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208 save_to_fs = False
174
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diff changeset
209 if repo and not ctx.force_render:
415
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diff changeset
210 render_result = repo.get(
411
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diff changeset
211 ctx.uri,
415
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diff changeset
212 lambda: _do_render_page_segments(ctx.page, page_data),
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diff changeset
213 fs_cache_time=ctx.page.path_mtime,
411
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diff changeset
214 save_to_fs=save_to_fs)
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215 else:
415
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diff changeset
216 render_result = _do_render_page_segments(ctx.page, page_data)
411
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diff changeset
217 if repo:
415
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diff changeset
218 repo.put(ctx.uri, render_result, save_to_fs)
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219
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220 # Render layout.
415
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diff changeset
221 page = ctx.page
338
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diff changeset
222 ctx.setCurrentPass(PASS_RENDERING)
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223 layout_name = page.config.get('layout')
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224 if layout_name is None:
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225 layout_name = page.source.config.get('default_layout', 'default')
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226 null_names = ['', 'none', 'nil']
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227 if layout_name not in null_names:
415
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diff changeset
228 build_layout_data(page, page_data, render_result['segments'])
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229 layout_result = _do_render_layout(layout_name, page, page_data)
3
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230 else:
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diff changeset
231 layout_result = {
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232 'content': render_result['segments']['content'],
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233 'pass_info': None}
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234
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235 rp = RenderedPage(page, ctx.uri, ctx.page_num)
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236 rp.data = page_data
415
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237 rp.content = layout_result['content']
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238 rp.render_info = {
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diff changeset
239 PASS_FORMATTING: RenderPassInfo._fromJson(
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diff changeset
240 render_result['pass_info'])}
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diff changeset
241 if layout_result['pass_info'] is not None:
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diff changeset
242 rp.render_info[PASS_RENDERING] = RenderPassInfo._fromJson(
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diff changeset
243 layout_result['pass_info'])
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244 return rp
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245 finally:
338
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diff changeset
246 ctx.setCurrentPass(PASS_NONE)
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247 eis.popPage()
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248
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249
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250 def render_page_segments(ctx):
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251 eis = ctx.app.env.exec_info_stack
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252 eis.pushPage(ctx.page, ctx)
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253 try:
415
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diff changeset
254 ctx.setCurrentPass(PASS_FORMATTING)
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diff changeset
255 repo = ctx.app.env.rendered_segments_repository
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diff changeset
256 save_to_fs = True
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diff changeset
257 if ctx.app.env.fs_cache_only_for_main_page and not eis.is_main_page:
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diff changeset
258 save_to_fs = False
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diff changeset
259 if repo and not ctx.force_render:
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diff changeset
260 render_result = repo.get(
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diff changeset
261 ctx.uri,
419
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diff changeset
262 lambda: _do_render_page_segments_from_ctx(ctx),
415
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diff changeset
263 fs_cache_time=ctx.page.path_mtime,
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diff changeset
264 save_to_fs=save_to_fs)
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diff changeset
265 else:
419
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diff changeset
266 render_result = _do_render_page_segments_from_ctx(ctx)
415
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diff changeset
267 if repo:
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diff changeset
268 repo.put(ctx.uri, render_result, save_to_fs)
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
269 finally:
338
938be93215cb bake: Improve render context and bake record, fix incremental bake bugs.
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parents: 334
diff changeset
270 ctx.setCurrentPass(PASS_NONE)
3
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diff changeset
271 eis.popPage()
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diff changeset
272
415
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diff changeset
273 rs = RenderedSegments(
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diff changeset
274 render_result['segments'],
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diff changeset
275 RenderPassInfo._fromJson(render_result['pass_info']))
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diff changeset
276 return rs
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diff changeset
277
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diff changeset
278
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diff changeset
279 def _build_render_data(ctx):
419
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diff changeset
280 with ctx.app.env.timerScope("PageDataBuild"):
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diff changeset
281 data_ctx = DataBuildingContext(ctx.page, page_num=ctx.page_num)
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diff changeset
282 data_ctx.pagination_source = ctx.pagination_source
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diff changeset
283 data_ctx.pagination_filter = ctx.pagination_filter
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diff changeset
284 page_data = build_page_data(data_ctx)
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diff changeset
285 if ctx.custom_data:
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diff changeset
286 page_data.update(ctx.custom_data)
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diff changeset
287 return page_data
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diff changeset
288
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diff changeset
289
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diff changeset
290 def _do_render_page_segments_from_ctx(ctx):
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diff changeset
291 page_data = _build_render_data(ctx)
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diff changeset
292 return _do_render_page_segments(ctx.page, page_data)
415
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diff changeset
293
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294
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295 def _do_render_page_segments(page, page_data):
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296 app = page.app
415
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diff changeset
297
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diff changeset
298 cpi = app.env.exec_info_stack.current_page_info
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diff changeset
299 assert cpi is not None
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diff changeset
300 assert cpi.page == page
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diff changeset
301
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302 engine_name = page.config.get('template_engine')
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303 format_name = page.config.get('format')
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304
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305 engine = get_template_engine(app, engine_name)
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306
415
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diff changeset
307 formatted_segments = {}
5
474c9882decf Upgrade to Python 3.
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diff changeset
308 for seg_name, seg in page.raw_content.items():
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diff changeset
309 seg_text = ''
3
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310 for seg_part in seg.parts:
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311 part_format = seg_part.fmt or format_name
128
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diff changeset
312 try:
411
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diff changeset
313 with app.env.timerScope(engine.__class__.__name__):
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diff changeset
314 part_text = engine.renderString(
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diff changeset
315 seg_part.content, page_data,
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diff changeset
316 filename=page.path)
128
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parents: 96
diff changeset
317 except TemplatingError as err:
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diff changeset
318 err.lineno += seg_part.line
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diff changeset
319 raise err
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diff changeset
320
3
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321 part_text = format_text(app, part_format, part_text)
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diff changeset
322 seg_text += part_text
415
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diff changeset
323 formatted_segments[seg_name] = seg_text
3
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parents:
diff changeset
324
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diff changeset
325 if seg_name == 'content':
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diff changeset
326 m = content_abstract_re.search(seg_text)
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parents:
diff changeset
327 if m:
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parents:
diff changeset
328 offset = m.start()
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parents:
diff changeset
329 content_abstract = seg_text[:offset]
415
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diff changeset
330 formatted_segments['content.abstract'] = content_abstract
3
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parents:
diff changeset
331
415
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parents: 411
diff changeset
332 pass_info = cpi.render_ctx.render_passes.get(PASS_FORMATTING)
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parents: 411
diff changeset
333 res = {
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diff changeset
334 'segments': formatted_segments,
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diff changeset
335 'pass_info': pass_info._toJson()}
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diff changeset
336 return res
3
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parents:
diff changeset
337
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parents:
diff changeset
338
415
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diff changeset
339 def _do_render_layout(layout_name, page, layout_data):
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diff changeset
340 cpi = page.app.env.exec_info_stack.current_page_info
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diff changeset
341 assert cpi is not None
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diff changeset
342 assert cpi.page == page
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diff changeset
343
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diff changeset
344 names = layout_name.split(',')
427
3b658190c02b performance: Compute default layout extensions only once.
Ludovic Chabant <ludovic@chabant.com>
parents: 419
diff changeset
345 default_exts = page.app.env.default_layout_extensions
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
346 full_names = []
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diff changeset
347 for name in names:
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parents:
diff changeset
348 if '.' not in name:
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parents:
diff changeset
349 for ext in default_exts:
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parents:
diff changeset
350 full_names.append(name + ext)
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parents:
diff changeset
351 else:
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parents:
diff changeset
352 full_names.append(name)
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parents:
diff changeset
353
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
354 _, engine_name = os.path.splitext(full_names[0])
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parents:
diff changeset
355 engine_name = engine_name.lstrip('.')
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parents:
diff changeset
356 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
357
153
1c3d229158ba Make a nice error message when a layout hasn't been found.
Ludovic Chabant <ludovic@chabant.com>
parents: 128
diff changeset
358 try:
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parents: 128
diff changeset
359 output = engine.renderFile(full_names, layout_data)
1c3d229158ba Make a nice error message when a layout hasn't been found.
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parents: 128
diff changeset
360 except TemplateNotFoundError as ex:
1c3d229158ba Make a nice error message when a layout hasn't been found.
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parents: 128
diff changeset
361 msg = "Can't find template for page: %s\n" % page.path
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parents: 128
diff changeset
362 msg += "Looked for: %s" % ', '.join(full_names)
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parents: 128
diff changeset
363 raise Exception(msg) from ex
415
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parents: 411
diff changeset
364
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diff changeset
365 pass_info = cpi.render_ctx.render_passes.get(PASS_RENDERING)
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diff changeset
366 res = {'content': output, 'pass_info': pass_info._toJson()}
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diff changeset
367 return res
3
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parents:
diff changeset
368
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
369
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diff changeset
370 def get_template_engine(app, engine_name):
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parents:
diff changeset
371 if engine_name == 'html':
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diff changeset
372 engine_name = None
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diff changeset
373 engine_name = engine_name or app.config.get('site/default_template_engine')
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parents:
diff changeset
374 for engine in app.plugin_loader.getTemplateEngines():
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parents:
diff changeset
375 if engine_name in engine.ENGINE_NAMES:
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parents:
diff changeset
376 return engine
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
377 raise TemplateEngineNotFound("No such template engine: %s" % engine_name)
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parents: 174
diff changeset
378
3
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parents:
diff changeset
379
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
380 def format_text(app, format_name, txt, exact_format=False):
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parents: 96
diff changeset
381 if exact_format and not format_name:
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parents: 96
diff changeset
382 raise Exception("You need to specify a format name.")
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parents: 96
diff changeset
383
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parents: 96
diff changeset
384 format_count = 0
3
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parents:
diff changeset
385 format_name = format_name or app.config.get('site/default_format')
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parents:
diff changeset
386 for fmt in app.plugin_loader.getFormatters():
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parents:
diff changeset
387 if fmt.FORMAT_NAMES is None or format_name in fmt.FORMAT_NAMES:
411
e7b865f8f335 bake: Enable multiprocess baking.
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parents: 369
diff changeset
388 with app.env.timerScope(fmt.__class__.__name__):
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parents: 369
diff changeset
389 txt = fmt.render(format_name, txt)
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
390 format_count += 1
3
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parents:
diff changeset
391 if fmt.OUTPUT_FORMAT is not None:
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parents:
diff changeset
392 format_name = fmt.OUTPUT_FORMAT
128
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parents: 96
diff changeset
393 if exact_format and format_count == 0:
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
394 raise Exception("No such format: %s" % format_name)
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
395 return txt
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
396