Mercurial > piecrust2

annotate piecrust/rendering.py @ 712:aed8a860c1d0

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internal: Remove exception logging that shouldn't happen. Better message.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 26 May 2016 20:43:51 -0700
parents ab5c6a8ae90a
children a14371c5cda7
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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, SettingFilterClause, 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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14 logger = logging.getLogger(__name__)
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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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25 class TemplateEngineNotFound(Exception):
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26 pass
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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, sub_num=sub_num)
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37
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38 def __getattr__(self, name):
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39 return getattr(self.page, name)
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41
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42 class RenderedSegments(object):
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43 def __init__(self, segments, render_pass_info):
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44 self.segments = segments
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45 self.render_pass_info = render_pass_info
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46
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47
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48 class RenderedLayout(object):
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49 def __init__(self, content, render_pass_info):
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50 self.content = content
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51 self.render_pass_info = render_pass_info
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52
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53
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54 class RenderedPage(object):
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55 def __init__(self, page, uri, num=1):
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56 self.page = page
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57 self.uri = uri
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58 self.num = num
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59 self.data = None
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60 self.content = None
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61 self.render_info = [None, None]
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62
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63 @property
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64 def app(self):
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65 return self.page.app
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66
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67 def copyRenderInfo(self):
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68 return copy.deepcopy(self.render_info)
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70
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71 PASS_NONE = -1
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72 PASS_FORMATTING = 0
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73 PASS_RENDERING = 1
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76 RENDER_PASSES = [PASS_FORMATTING, PASS_RENDERING]
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78
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79 class RenderPassInfo(object):
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80 def __init__(self):
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81 self.used_source_names = set()
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82 self.used_pagination = False
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83 self.pagination_has_more = False
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84 self.used_assets = False
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85 self._custom_info = {}
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86
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87 def setCustomInfo(self, key, info):
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88 self._custom_info[key] = info
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89
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90 def getCustomInfo(self, key, default=None, create_if_missing=False):
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91 if create_if_missing:
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92 return self._custom_info.setdefault(key, default)
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93 return self._custom_info.get(key, default)
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94
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95
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96 def _toJson(self):
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97 data = {
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98 'used_source_names': list(self.used_source_names),
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99 'used_pagination': self.used_pagination,
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100 'pagination_has_more': self.pagination_has_more,
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101 'used_assets': self.used_assets,
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102 'custom_info': self._custom_info}
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103 return data
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104
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105 @staticmethod
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106 def _fromJson(data):
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107 assert data is not None
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108 rpi = RenderPassInfo()
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109 rpi.used_source_names = set(data['used_source_names'])
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110 rpi.used_pagination = data['used_pagination']
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111 rpi.pagination_has_more = data['pagination_has_more']
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112 rpi.used_assets = data['used_assets']
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113 rpi._custom_info = data['custom_info']
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114 return rpi
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116
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117 class PageRenderingContext(object):
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118 def __init__(self, qualified_page, page_num=1,
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119 force_render=False, is_from_request=False):
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120 self.page = qualified_page
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121 self.page_num = page_num
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122 self.force_render = force_render
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123 self.is_from_request = is_from_request
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124 self.pagination_source = None
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125 self.pagination_filter = None
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126 self.custom_data = None
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127 self.render_passes = [None, None] # Same length as RENDER_PASSES
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128 self._current_pass = PASS_NONE
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129
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130 @property
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131 def app(self):
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132 return self.page.app
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133
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134 @property
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135 def source_metadata(self):
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136 return self.page.source_metadata
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137
369
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138 @cached_property
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139 def uri(self):
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140 return self.page.getUri(self.page_num)
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141
338
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142 @property
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143 def current_pass_info(self):
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144 if self._current_pass != PASS_NONE:
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145 return self.render_passes[self._current_pass]
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146 return None
338
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147
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148 def setCurrentPass(self, rdr_pass):
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149 if rdr_pass != PASS_NONE:
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150 self.render_passes[rdr_pass] = RenderPassInfo()
338
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151 self._current_pass = rdr_pass
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152
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153 def setPagination(self, paginator):
338
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154 self._raiseIfNoCurrentPass()
415
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155 pass_info = self.current_pass_info
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156 if pass_info.used_pagination:
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157 raise Exception("Pagination has already been used.")
415
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158 assert paginator.is_loaded
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159 pass_info.used_pagination = True
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160 pass_info.pagination_has_more = paginator.has_more
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161 self.addUsedSource(paginator._source)
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162
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163 def addUsedSource(self, source):
338
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164 self._raiseIfNoCurrentPass()
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165 if isinstance(source, PageSource):
415
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166 pass_info = self.current_pass_info
338
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167 pass_info.used_source_names.add(source.name)
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168
338
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169 def _raiseIfNoCurrentPass(self):
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170 if self._current_pass == PASS_NONE:
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171 raise Exception("No rendering pass is currently active.")
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172
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173
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174 def render_page(ctx):
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175 eis = ctx.app.env.exec_info_stack
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176 eis.pushPage(ctx.page, ctx)
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177 try:
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178 # Build the data for both segment and layout rendering.
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179 with ctx.app.env.timerScope("BuildRenderData"):
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180 page_data = _build_render_data(ctx)
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181
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182 # Render content segments.
338
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183 ctx.setCurrentPass(PASS_FORMATTING)
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184 repo = ctx.app.env.rendered_segments_repository
411
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185 save_to_fs = True
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186 if ctx.app.env.fs_cache_only_for_main_page and not eis.is_main_page:
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187 save_to_fs = False
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188 with ctx.app.env.timerScope("PageRenderSegments"):
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189 if repo and not ctx.force_render:
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190 render_result = repo.get(
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191 ctx.uri,
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192 lambda: _do_render_page_segments(ctx.page, page_data),
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193 fs_cache_time=ctx.page.path_mtime,
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194 save_to_fs=save_to_fs)
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195 else:
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196 render_result = _do_render_page_segments(ctx.page, page_data)
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197 if repo:
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198 repo.put(ctx.uri, render_result, save_to_fs)
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199
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200 # Render layout.
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201 page = ctx.page
338
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202 ctx.setCurrentPass(PASS_RENDERING)
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203 layout_name = page.config.get('layout')
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204 if layout_name is None:
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205 layout_name = page.source.config.get('default_layout', 'default')
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206 null_names = ['', 'none', 'nil']
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207 if layout_name not in null_names:
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208 with ctx.app.env.timerScope("BuildRenderData"):
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209 build_layout_data(page, page_data, render_result['segments'])
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210
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211 with ctx.app.env.timerScope("PageRenderLayout"):
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212 layout_result = _do_render_layout(layout_name, page, page_data)
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213 else:
415
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diff changeset
214 layout_result = {
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215 'content': render_result['segments']['content'],
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216 'pass_info': None}
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217
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218 rp = RenderedPage(page, ctx.uri, ctx.page_num)
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219 rp.data = page_data
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220 rp.content = layout_result['content']
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diff changeset
221 rp.render_info[PASS_FORMATTING] = RenderPassInfo._fromJson(
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diff changeset
222 render_result['pass_info'])
415
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diff changeset
223 if layout_result['pass_info'] is not None:
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diff changeset
224 rp.render_info[PASS_RENDERING] = RenderPassInfo._fromJson(
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diff changeset
225 layout_result['pass_info'])
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226 return rp
522
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diff changeset
227 except Exception as ex:
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diff changeset
228 logger.exception(ex)
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diff changeset
229 page_rel_path = os.path.relpath(ctx.page.path, ctx.app.root_dir)
522
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230 raise Exception("Error rendering page: %s" % page_rel_path) from ex
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231 finally:
338
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diff changeset
232 ctx.setCurrentPass(PASS_NONE)
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233 eis.popPage()
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234
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235
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236 def render_page_segments(ctx):
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237 eis = ctx.app.env.exec_info_stack
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238 eis.pushPage(ctx.page, ctx)
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239 try:
415
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240 ctx.setCurrentPass(PASS_FORMATTING)
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diff changeset
241 repo = ctx.app.env.rendered_segments_repository
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242 save_to_fs = True
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243 if ctx.app.env.fs_cache_only_for_main_page and not eis.is_main_page:
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244 save_to_fs = False
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245 if repo and not ctx.force_render:
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diff changeset
246 render_result = repo.get(
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diff changeset
247 ctx.uri,
419
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diff changeset
248 lambda: _do_render_page_segments_from_ctx(ctx),
415
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diff changeset
249 fs_cache_time=ctx.page.path_mtime,
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diff changeset
250 save_to_fs=save_to_fs)
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diff changeset
251 else:
419
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diff changeset
252 render_result = _do_render_page_segments_from_ctx(ctx)
415
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diff changeset
253 if repo:
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diff changeset
254 repo.put(ctx.uri, render_result, save_to_fs)
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255 finally:
338
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diff changeset
256 ctx.setCurrentPass(PASS_NONE)
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257 eis.popPage()
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258
415
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diff changeset
259 rs = RenderedSegments(
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diff changeset
260 render_result['segments'],
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diff changeset
261 RenderPassInfo._fromJson(render_result['pass_info']))
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diff changeset
262 return rs
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diff changeset
263
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diff changeset
264
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diff changeset
265 def _build_render_data(ctx):
419
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diff changeset
266 with ctx.app.env.timerScope("PageDataBuild"):
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diff changeset
267 data_ctx = DataBuildingContext(ctx.page, page_num=ctx.page_num)
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diff changeset
268 data_ctx.pagination_source = ctx.pagination_source
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diff changeset
269 data_ctx.pagination_filter = ctx.pagination_filter
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diff changeset
270 page_data = build_page_data(data_ctx)
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parents: 415
diff changeset
271 if ctx.custom_data:
440
32c7c2d219d2 performance: Refactor how data is managed to reduce copying.
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diff changeset
272 page_data._appendMapping(ctx.custom_data)
419
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diff changeset
273 return page_data
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diff changeset
274
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diff changeset
275
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diff changeset
276 def _do_render_page_segments_from_ctx(ctx):
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diff changeset
277 page_data = _build_render_data(ctx)
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diff changeset
278 return _do_render_page_segments(ctx.page, page_data)
415
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diff changeset
279
3
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280
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281 def _do_render_page_segments(page, page_data):
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282 app = page.app
415
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diff changeset
283
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diff changeset
284 cpi = app.env.exec_info_stack.current_page_info
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diff changeset
285 assert cpi is not None
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diff changeset
286 assert cpi.page == page
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287
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288 engine_name = page.config.get('template_engine')
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289 format_name = page.config.get('format')
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290
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291 engine = get_template_engine(app, engine_name)
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292
415
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diff changeset
293 formatted_segments = {}
578
683be25cbdb2 internal: Rename `raw_content` to `segments` since it's what it is.
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diff changeset
294 for seg_name, seg in page.segments.items():
5
474c9882decf Upgrade to Python 3.
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diff changeset
295 seg_text = ''
3
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296 for seg_part in seg.parts:
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297 part_format = seg_part.fmt or format_name
128
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diff changeset
298 try:
411
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diff changeset
299 with app.env.timerScope(engine.__class__.__name__):
454
96d363e2da4b templating: Let Jinja2 cache the parsed template for page contents.
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parents: 440
diff changeset
300 part_text = engine.renderSegmentPart(
96d363e2da4b templating: Let Jinja2 cache the parsed template for page contents.
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parents: 440
diff changeset
301 page.path, seg_part, page_data)
128
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diff changeset
302 except TemplatingError as err:
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diff changeset
303 err.lineno += seg_part.line
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diff changeset
304 raise err
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diff changeset
305
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306 part_text = format_text(app, part_format, part_text)
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diff changeset
307 seg_text += part_text
415
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diff changeset
308 formatted_segments[seg_name] = seg_text
3
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309
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310 if seg_name == 'content':
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diff changeset
311 m = content_abstract_re.search(seg_text)
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diff changeset
312 if m:
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diff changeset
313 offset = m.start()
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diff changeset
314 content_abstract = seg_text[:offset]
415
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diff changeset
315 formatted_segments['content.abstract'] = content_abstract
3
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parents:
diff changeset
316
698
33ab9badfd7a render: Change how we store render passes info.
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parents: 586
diff changeset
317 pass_info = cpi.render_ctx.render_passes[PASS_FORMATTING]
415
0e9a94b7fdfa bake: Improve bake record information.
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diff changeset
318 res = {
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diff changeset
319 'segments': formatted_segments,
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diff changeset
320 'pass_info': pass_info._toJson()}
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diff changeset
321 return res
3
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parents:
diff changeset
322
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parents:
diff changeset
323
415
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diff changeset
324 def _do_render_layout(layout_name, page, layout_data):
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diff changeset
325 cpi = page.app.env.exec_info_stack.current_page_info
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parents: 411
diff changeset
326 assert cpi is not None
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diff changeset
327 assert cpi.page == page
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diff changeset
328
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
329 names = layout_name.split(',')
427
3b658190c02b performance: Compute default layout extensions only once.
Ludovic Chabant <ludovic@chabant.com>
parents: 419
diff changeset
330 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
331 full_names = []
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parents:
diff changeset
332 for name in names:
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parents:
diff changeset
333 if '.' not in name:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
334 for ext in default_exts:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
335 full_names.append(name + ext)
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
336 else:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
337 full_names.append(name)
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parents:
diff changeset
338
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
339 _, engine_name = os.path.splitext(full_names[0])
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parents:
diff changeset
340 engine_name = engine_name.lstrip('.')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
341 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.
Ludovic Chabant <ludovic@chabant.com>
parents: 174
diff changeset
342
153
1c3d229158ba Make a nice error message when a layout hasn't been found.
Ludovic Chabant <ludovic@chabant.com>
parents: 128
diff changeset
343 try:
1c3d229158ba Make a nice error message when a layout hasn't been found.
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parents: 128
diff changeset
344 output = engine.renderFile(full_names, layout_data)
1c3d229158ba Make a nice error message when a layout hasn't been found.
Ludovic Chabant <ludovic@chabant.com>
parents: 128
diff changeset
345 except TemplateNotFoundError as ex:
711
ab5c6a8ae90a bake: Replace hard-coded taxonomy support with "generator" system.
Ludovic Chabant <ludovic@chabant.com>
parents: 698
diff changeset
346 logger.exception(ex)
153
1c3d229158ba Make a nice error message when a layout hasn't been found.
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parents: 128
diff changeset
347 msg = "Can't find template for page: %s\n" % page.path
1c3d229158ba Make a nice error message when a layout hasn't been found.
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parents: 128
diff changeset
348 msg += "Looked for: %s" % ', '.join(full_names)
1c3d229158ba Make a nice error message when a layout hasn't been found.
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parents: 128
diff changeset
349 raise Exception(msg) from ex
415
0e9a94b7fdfa bake: Improve bake record information.
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parents: 411
diff changeset
350
698
33ab9badfd7a render: Change how we store render passes info.
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parents: 586
diff changeset
351 pass_info = cpi.render_ctx.render_passes[PASS_RENDERING]
415
0e9a94b7fdfa bake: Improve bake record information.
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parents: 411
diff changeset
352 res = {'content': output, 'pass_info': pass_info._toJson()}
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parents: 411
diff changeset
353 return res
3
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parents:
diff changeset
354
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
355
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parents:
diff changeset
356 def get_template_engine(app, engine_name):
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parents:
diff changeset
357 if engine_name == 'html':
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parents:
diff changeset
358 engine_name = None
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parents:
diff changeset
359 engine_name = engine_name or app.config.get('site/default_template_engine')
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parents:
diff changeset
360 for engine in app.plugin_loader.getTemplateEngines():
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parents:
diff changeset
361 if engine_name in engine.ENGINE_NAMES:
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parents:
diff changeset
362 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
363 raise TemplateEngineNotFound("No such template engine: %s" % engine_name)
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
364
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
365
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
366 def format_text(app, format_name, txt, exact_format=False):
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
367 if exact_format and not format_name:
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parents: 96
diff changeset
368 raise Exception("You need to specify a format name.")
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parents: 96
diff changeset
369
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
370 format_count = 0
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
371 format_name = format_name or app.config.get('site/default_format')
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parents:
diff changeset
372 for fmt in app.plugin_loader.getFormatters():
457
7d868afc6791 rendering: Truly skip formatters that are not enabled.
Ludovic Chabant <ludovic@chabant.com>
parents: 454
diff changeset
373 if not fmt.enabled:
7d868afc6791 rendering: Truly skip formatters that are not enabled.
Ludovic Chabant <ludovic@chabant.com>
parents: 454
diff changeset
374 continue
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
375 if fmt.FORMAT_NAMES is None or format_name in fmt.FORMAT_NAMES:
411
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents: 369
diff changeset
376 with app.env.timerScope(fmt.__class__.__name__):
e7b865f8f335 bake: Enable multiprocess baking.
Ludovic Chabant <ludovic@chabant.com>
parents: 369
diff changeset
377 txt = fmt.render(format_name, txt)
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
378 format_count += 1
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
379 if fmt.OUTPUT_FORMAT is not None:
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parents:
diff changeset
380 format_name = fmt.OUTPUT_FORMAT
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
381 if exact_format and format_count == 0:
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
382 raise Exception("No such format: %s" % format_name)
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
383 return txt
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
384