Mercurial > piecrust2

annotate piecrust/rendering.py @ 834:10c482d57c79

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Allow an individual page to override pretty_urls in it config
author Ben Artin <ben@artins.org>
date Mon, 02 Jan 2017 20:33:57 -0500
parents bf9f4e55f751
children dca51cd8147a
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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.fastpickle import _pickle_object, _unpickle_object
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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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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 self.pretty_urls = page.config.get("pretty_urls")
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36
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37 def getUri(self, sub_num=1):
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38 return self.route.getUri(self.route_metadata, 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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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, 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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72
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73 PASS_NONE = -1
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74 PASS_FORMATTING = 0
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75 PASS_RENDERING = 1
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78 RENDER_PASSES = [PASS_FORMATTING, PASS_RENDERING]
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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_pagination = False
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85 self.pagination_has_more = False
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86 self.used_assets = False
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87 self._custom_info = {}
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88
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89 def setCustomInfo(self, key, info):
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90 self._custom_info[key] = info
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91
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92 def getCustomInfo(self, key, default=None, create_if_missing=False):
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93 if create_if_missing:
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94 return self._custom_info.setdefault(key, default)
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95 return self._custom_info.get(key, default)
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98 class PageRenderingContext(object):
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99 def __init__(self, qualified_page, page_num=1,
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100 force_render=False, is_from_request=False):
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101 self.page = qualified_page
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102 self.page_num = page_num
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103 self.force_render = force_render
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104 self.is_from_request = is_from_request
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105 self.pagination_source = None
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106 self.pagination_filter = None
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107 self.custom_data = {}
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108 self.render_passes = [None, None] # Same length as RENDER_PASSES
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109 self._current_pass = PASS_NONE
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110
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111 @property
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112 def app(self):
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113 return self.page.app
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114
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115 @property
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116 def source_metadata(self):
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117 return self.page.source_metadata
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118
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119 @cached_property
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120 def uri(self):
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121 return self.page.getUri(self.page_num)
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122
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123 @property
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124 def current_pass_info(self):
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125 if self._current_pass != PASS_NONE:
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126 return self.render_passes[self._current_pass]
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127 return None
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128
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129 def setCurrentPass(self, rdr_pass):
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130 if rdr_pass != PASS_NONE:
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diff changeset
131 self.render_passes[rdr_pass] = RenderPassInfo()
338
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diff changeset
132 self._current_pass = rdr_pass
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diff changeset
133
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134 def setPagination(self, paginator):
338
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diff changeset
135 self._raiseIfNoCurrentPass()
415
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diff changeset
136 pass_info = self.current_pass_info
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diff changeset
137 if pass_info.used_pagination:
3
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138 raise Exception("Pagination has already been used.")
415
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diff changeset
139 assert paginator.is_loaded
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diff changeset
140 pass_info.used_pagination = True
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parents: 411
diff changeset
141 pass_info.pagination_has_more = paginator.has_more
96
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diff changeset
142 self.addUsedSource(paginator._source)
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143
23
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parents: 12
diff changeset
144 def addUsedSource(self, source):
338
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diff changeset
145 self._raiseIfNoCurrentPass()
23
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diff changeset
146 if isinstance(source, PageSource):
415
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diff changeset
147 pass_info = self.current_pass_info
338
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diff changeset
148 pass_info.used_source_names.add(source.name)
23
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diff changeset
149
338
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diff changeset
150 def _raiseIfNoCurrentPass(self):
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diff changeset
151 if self._current_pass == PASS_NONE:
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diff changeset
152 raise Exception("No rendering pass is currently active.")
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diff changeset
153
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154
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155 def render_page(ctx):
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156 eis = ctx.app.env.exec_info_stack
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diff changeset
157 eis.pushPage(ctx.page, ctx)
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158 try:
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159 # Build the data for both segment and layout rendering.
586
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diff changeset
160 with ctx.app.env.timerScope("BuildRenderData"):
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diff changeset
161 page_data = _build_render_data(ctx)
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162
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163 # Render content segments.
338
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diff changeset
164 ctx.setCurrentPass(PASS_FORMATTING)
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165 repo = ctx.app.env.rendered_segments_repository
411
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diff changeset
166 save_to_fs = True
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diff changeset
167 if ctx.app.env.fs_cache_only_for_main_page and not eis.is_main_page:
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diff changeset
168 save_to_fs = False
586
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diff changeset
169 with ctx.app.env.timerScope("PageRenderSegments"):
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170 if repo and not ctx.force_render:
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diff changeset
171 render_result = repo.get(
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diff changeset
172 ctx.uri,
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diff changeset
173 lambda: _do_render_page_segments(ctx.page, page_data),
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diff changeset
174 fs_cache_time=ctx.page.path_mtime,
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diff changeset
175 save_to_fs=save_to_fs)
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diff changeset
176 else:
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diff changeset
177 render_result = _do_render_page_segments(ctx.page, page_data)
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diff changeset
178 if repo:
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diff changeset
179 repo.put(ctx.uri, render_result, save_to_fs)
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180
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181 # Render layout.
415
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diff changeset
182 page = ctx.page
338
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diff changeset
183 ctx.setCurrentPass(PASS_RENDERING)
3
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diff changeset
184 layout_name = page.config.get('layout')
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diff changeset
185 if layout_name is None:
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diff changeset
186 layout_name = page.source.config.get('default_layout', 'default')
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187 null_names = ['', 'none', 'nil']
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diff changeset
188 if layout_name not in null_names:
586
59268b4d8c71 bake: Add new performance timers.
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parents: 578
diff changeset
189 with ctx.app.env.timerScope("BuildRenderData"):
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parents: 578
diff changeset
190 build_layout_data(page, page_data, render_result['segments'])
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diff changeset
191
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diff changeset
192 with ctx.app.env.timerScope("PageRenderLayout"):
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diff changeset
193 layout_result = _do_render_layout(layout_name, page, page_data)
3
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parents:
diff changeset
194 else:
415
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diff changeset
195 layout_result = {
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diff changeset
196 'content': render_result['segments']['content'],
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diff changeset
197 'pass_info': None}
3
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diff changeset
198
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diff changeset
199 rp = RenderedPage(page, ctx.uri, ctx.page_num)
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diff changeset
200 rp.data = page_data
415
0e9a94b7fdfa bake: Improve bake record information.
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parents: 411
diff changeset
201 rp.content = layout_result['content']
719
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parents: 715
diff changeset
202 rp.render_info[PASS_FORMATTING] = _unpickle_object(
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parents: 715
diff changeset
203 render_result['pass_info'])
415
0e9a94b7fdfa bake: Improve bake record information.
Ludovic Chabant <ludovic@chabant.com>
parents: 411
diff changeset
204 if layout_result['pass_info'] is not None:
719
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parents: 715
diff changeset
205 rp.render_info[PASS_RENDERING] = _unpickle_object(
a066f4ac9094 rendering: Use `fastpickle` serialization before JSON.
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parents: 715
diff changeset
206 layout_result['pass_info'])
3
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parents:
diff changeset
207 return rp
522
094bdf2f7c4c serve: Say what page a rendering error happened in.
Ludovic Chabant <ludovic@chabant.com>
parents: 520
diff changeset
208 except Exception as ex:
715
a14371c5cda7 debug: Pass the exceptions untouched when debugging.
Ludovic Chabant <ludovic@chabant.com>
parents: 711
diff changeset
209 if ctx.app.debug:
a14371c5cda7 debug: Pass the exceptions untouched when debugging.
Ludovic Chabant <ludovic@chabant.com>
parents: 711
diff changeset
210 raise
711
ab5c6a8ae90a bake: Replace hard-coded taxonomy support with "generator" system.
Ludovic Chabant <ludovic@chabant.com>
parents: 698
diff changeset
211 logger.exception(ex)
574
bc23465ed1b4 bug: Fix a crash when some errors occur during page rendering.
Ludovic Chabant <ludovic@chabant.com>
parents: 522
diff changeset
212 page_rel_path = os.path.relpath(ctx.page.path, ctx.app.root_dir)
522
094bdf2f7c4c serve: Say what page a rendering error happened in.
Ludovic Chabant <ludovic@chabant.com>
parents: 520
diff changeset
213 raise Exception("Error rendering page: %s" % page_rel_path) from ex
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
214 finally:
338
938be93215cb bake: Improve render context and bake record, fix incremental bake bugs.
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parents: 334
diff changeset
215 ctx.setCurrentPass(PASS_NONE)
3
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parents:
diff changeset
216 eis.popPage()
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parents:
diff changeset
217
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
218
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diff changeset
219 def render_page_segments(ctx):
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diff changeset
220 eis = ctx.app.env.exec_info_stack
96
0445a2232de7 Improvements and fixes to incremental baking.
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parents: 50
diff changeset
221 eis.pushPage(ctx.page, ctx)
3
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parents:
diff changeset
222 try:
415
0e9a94b7fdfa bake: Improve bake record information.
Ludovic Chabant <ludovic@chabant.com>
parents: 411
diff changeset
223 ctx.setCurrentPass(PASS_FORMATTING)
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parents: 411
diff changeset
224 repo = ctx.app.env.rendered_segments_repository
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parents: 411
diff changeset
225 save_to_fs = True
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parents: 411
diff changeset
226 if ctx.app.env.fs_cache_only_for_main_page and not eis.is_main_page:
0e9a94b7fdfa bake: Improve bake record information.
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parents: 411
diff changeset
227 save_to_fs = False
782
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diff changeset
228 with ctx.app.env.timerScope("PageRenderSegments"):
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diff changeset
229 if repo and not ctx.force_render:
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parents: 723
diff changeset
230 render_result = repo.get(
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parents: 723
diff changeset
231 ctx.uri,
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parents: 723
diff changeset
232 lambda: _do_render_page_segments_from_ctx(ctx),
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parents: 723
diff changeset
233 fs_cache_time=ctx.page.path_mtime,
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Ludovic Chabant <ludovic@chabant.com>
parents: 723
diff changeset
234 save_to_fs=save_to_fs)
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Ludovic Chabant <ludovic@chabant.com>
parents: 723
diff changeset
235 else:
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parents: 723
diff changeset
236 render_result = _do_render_page_segments_from_ctx(ctx)
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parents: 723
diff changeset
237 if repo:
df58592b40f8 internal: Add missing timer scope.
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parents: 723
diff changeset
238 repo.put(ctx.uri, render_result, save_to_fs)
3
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parents:
diff changeset
239 finally:
338
938be93215cb bake: Improve render context and bake record, fix incremental bake bugs.
Ludovic Chabant <ludovic@chabant.com>
parents: 334
diff changeset
240 ctx.setCurrentPass(PASS_NONE)
3
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diff changeset
241 eis.popPage()
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parents:
diff changeset
242
415
0e9a94b7fdfa bake: Improve bake record information.
Ludovic Chabant <ludovic@chabant.com>
parents: 411
diff changeset
243 rs = RenderedSegments(
0e9a94b7fdfa bake: Improve bake record information.
Ludovic Chabant <ludovic@chabant.com>
parents: 411
diff changeset
244 render_result['segments'],
719
a066f4ac9094 rendering: Use `fastpickle` serialization before JSON.
Ludovic Chabant <ludovic@chabant.com>
parents: 715
diff changeset
245 _unpickle_object(render_result['pass_info']))
415
0e9a94b7fdfa bake: Improve bake record information.
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parents: 411
diff changeset
246 return rs
0e9a94b7fdfa bake: Improve bake record information.
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parents: 411
diff changeset
247
0e9a94b7fdfa bake: Improve bake record information.
Ludovic Chabant <ludovic@chabant.com>
parents: 411
diff changeset
248
0e9a94b7fdfa bake: Improve bake record information.
Ludovic Chabant <ludovic@chabant.com>
parents: 411
diff changeset
249 def _build_render_data(ctx):
419
6801ad5aa1d4 internal: Optimize page segments rendering.
Ludovic Chabant <ludovic@chabant.com>
parents: 415
diff changeset
250 with ctx.app.env.timerScope("PageDataBuild"):
6801ad5aa1d4 internal: Optimize page segments rendering.
Ludovic Chabant <ludovic@chabant.com>
parents: 415
diff changeset
251 data_ctx = DataBuildingContext(ctx.page, page_num=ctx.page_num)
6801ad5aa1d4 internal: Optimize page segments rendering.
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parents: 415
diff changeset
252 data_ctx.pagination_source = ctx.pagination_source
6801ad5aa1d4 internal: Optimize page segments rendering.
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parents: 415
diff changeset
253 data_ctx.pagination_filter = ctx.pagination_filter
6801ad5aa1d4 internal: Optimize page segments rendering.
Ludovic Chabant <ludovic@chabant.com>
parents: 415
diff changeset
254 page_data = build_page_data(data_ctx)
6801ad5aa1d4 internal: Optimize page segments rendering.
Ludovic Chabant <ludovic@chabant.com>
parents: 415
diff changeset
255 if ctx.custom_data:
440
32c7c2d219d2 performance: Refactor how data is managed to reduce copying.
Ludovic Chabant <ludovic@chabant.com>
parents: 430
diff changeset
256 page_data._appendMapping(ctx.custom_data)
419
6801ad5aa1d4 internal: Optimize page segments rendering.
Ludovic Chabant <ludovic@chabant.com>
parents: 415
diff changeset
257 return page_data
6801ad5aa1d4 internal: Optimize page segments rendering.
Ludovic Chabant <ludovic@chabant.com>
parents: 415
diff changeset
258
6801ad5aa1d4 internal: Optimize page segments rendering.
Ludovic Chabant <ludovic@chabant.com>
parents: 415
diff changeset
259
6801ad5aa1d4 internal: Optimize page segments rendering.
Ludovic Chabant <ludovic@chabant.com>
parents: 415
diff changeset
260 def _do_render_page_segments_from_ctx(ctx):
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261 page_data = _build_render_data(ctx)
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262 return _do_render_page_segments(ctx.page, page_data)
415
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263
3
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264
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265 def _do_render_page_segments(page, page_data):
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266 app = page.app
415
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diff changeset
267
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268 cpi = app.env.exec_info_stack.current_page_info
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diff changeset
269 assert cpi is not None
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270 assert cpi.page == page
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271
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272 engine_name = page.config.get('template_engine')
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273 format_name = page.config.get('format')
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274
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275 engine = get_template_engine(app, engine_name)
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276
415
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277 formatted_segments = {}
578
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diff changeset
278 for seg_name, seg in page.segments.items():
5
474c9882decf Upgrade to Python 3.
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diff changeset
279 seg_text = ''
3
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280 for seg_part in seg.parts:
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281 part_format = seg_part.fmt or format_name
128
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diff changeset
282 try:
803
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diff changeset
283 with app.env.timerScope(
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284 engine.__class__.__name__ + '_segment'):
454
96d363e2da4b templating: Let Jinja2 cache the parsed template for page contents.
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diff changeset
285 part_text = engine.renderSegmentPart(
96d363e2da4b templating: Let Jinja2 cache the parsed template for page contents.
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diff changeset
286 page.path, seg_part, page_data)
128
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diff changeset
287 except TemplatingError as err:
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diff changeset
288 err.lineno += seg_part.line
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289 raise err
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290
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291 part_text = format_text(app, part_format, part_text)
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292 seg_text += part_text
415
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293 formatted_segments[seg_name] = seg_text
3
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294
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295 if seg_name == 'content':
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296 m = content_abstract_re.search(seg_text)
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297 if m:
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298 offset = m.start()
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299 content_abstract = seg_text[:offset]
415
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diff changeset
300 formatted_segments['content.abstract'] = content_abstract
3
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301
698
33ab9badfd7a render: Change how we store render passes info.
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diff changeset
302 pass_info = cpi.render_ctx.render_passes[PASS_FORMATTING]
415
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diff changeset
303 res = {
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diff changeset
304 'segments': formatted_segments,
719
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diff changeset
305 'pass_info': _pickle_object(pass_info)}
415
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diff changeset
306 return res
3
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diff changeset
307
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diff changeset
308
415
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diff changeset
309 def _do_render_layout(layout_name, page, layout_data):
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diff changeset
310 cpi = page.app.env.exec_info_stack.current_page_info
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diff changeset
311 assert cpi is not None
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diff changeset
312 assert cpi.page == page
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diff changeset
313
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diff changeset
314 names = layout_name.split(',')
427
3b658190c02b performance: Compute default layout extensions only once.
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parents: 419
diff changeset
315 default_exts = page.app.env.default_layout_extensions
3
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diff changeset
316 full_names = []
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diff changeset
317 for name in names:
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diff changeset
318 if '.' not in name:
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diff changeset
319 for ext in default_exts:
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diff changeset
320 full_names.append(name + ext)
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diff changeset
321 else:
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diff changeset
322 full_names.append(name)
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diff changeset
323
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diff changeset
324 _, engine_name = os.path.splitext(full_names[0])
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diff changeset
325 engine_name = engine_name.lstrip('.')
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parents:
diff changeset
326 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
327
153
1c3d229158ba Make a nice error message when a layout hasn't been found.
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parents: 128
diff changeset
328 try:
803
bf9f4e55f751 rendering: Separate performance timers for renering segments and layouts.
Ludovic Chabant <ludovic@chabant.com>
parents: 784
diff changeset
329 with page.app.env.timerScope(engine.__class__.__name__ + '_layout'):
784
6d8fe8e93a91 internal: Add missing timer scope.
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parents: 782
diff changeset
330 output = engine.renderFile(full_names, layout_data)
153
1c3d229158ba Make a nice error message when a layout hasn't been found.
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parents: 128
diff changeset
331 except TemplateNotFoundError as ex:
711
ab5c6a8ae90a bake: Replace hard-coded taxonomy support with "generator" system.
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parents: 698
diff changeset
332 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
333 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
334 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
335 raise Exception(msg) from ex
415
0e9a94b7fdfa bake: Improve bake record information.
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diff changeset
336
698
33ab9badfd7a render: Change how we store render passes info.
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diff changeset
337 pass_info = cpi.render_ctx.render_passes[PASS_RENDERING]
719
a066f4ac9094 rendering: Use `fastpickle` serialization before JSON.
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diff changeset
338 res = {'content': output, 'pass_info': _pickle_object(pass_info)}
415
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diff changeset
339 return res
3
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parents:
diff changeset
340
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diff changeset
341
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diff changeset
342 def get_template_engine(app, engine_name):
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parents:
diff changeset
343 if engine_name == 'html':
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diff changeset
344 engine_name = None
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diff changeset
345 engine_name = engine_name or app.config.get('site/default_template_engine')
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diff changeset
346 for engine in app.plugin_loader.getTemplateEngines():
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diff changeset
347 if engine_name in engine.ENGINE_NAMES:
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parents:
diff changeset
348 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
349 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
350
3
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parents:
diff changeset
351
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
352 def format_text(app, format_name, txt, exact_format=False):
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diff changeset
353 if exact_format and not format_name:
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diff changeset
354 raise Exception("You need to specify a format name.")
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parents: 96
diff changeset
355
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diff changeset
356 format_count = 0
3
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diff changeset
357 format_name = format_name or app.config.get('site/default_format')
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parents:
diff changeset
358 for fmt in app.plugin_loader.getFormatters():
457
7d868afc6791 rendering: Truly skip formatters that are not enabled.
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parents: 454
diff changeset
359 if not fmt.enabled:
7d868afc6791 rendering: Truly skip formatters that are not enabled.
Ludovic Chabant <ludovic@chabant.com>
parents: 454
diff changeset
360 continue
3
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parents:
diff changeset
361 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
362 with app.env.timerScope(fmt.__class__.__name__):
e7b865f8f335 bake: Enable multiprocess baking.
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parents: 369
diff changeset
363 txt = fmt.render(format_name, txt)
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
364 format_count += 1
3
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parents:
diff changeset
365 if fmt.OUTPUT_FORMAT is not None:
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
366 format_name = fmt.OUTPUT_FORMAT
128
28444014ce7d Fix error reporting and counting of lines.
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parents: 96
diff changeset
367 if exact_format and format_count == 0:
28444014ce7d Fix error reporting and counting of lines.
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diff changeset
368 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
369 return txt
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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parents:
diff changeset
370