Mercurial > piecrust2

annotate piecrust/rendering.py @ 23:923699e816d0

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Don't try to get the name of a source that doesn't have one. TODO: clean up code duplication.
author Ludovic Chabant <ludovic@chabant.com>
date Tue, 19 Aug 2014 08:34:16 -0700
parents 30a42341cfa8
children 65ae19c4e8a3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
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1 import re
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2 import os.path
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3 import logging
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4 from piecrust.data.builder import (DataBuildingContext, build_page_data,
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5 build_layout_data)
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6 from piecrust.environment import PHASE_PAGE_FORMATTING, PHASE_PAGE_RENDERING
23
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7 from piecrust.sources.base import PageSource
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8 from piecrust.uriutil import get_slug
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9
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10
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11 logger = logging.getLogger(__name__)
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12
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13
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14 content_abstract_re = re.compile(r'^<!--\s*(more|(page)?break)\s*-->\s*$',
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15 re.MULTILINE)
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16
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17
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18 class PageRenderingError(Exception):
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19 pass
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21
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22 class RenderedPage(object):
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23 def __init__(self, page, uri, num=1):
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24 self.page = page
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25 self.uri = uri
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26 self.num = num
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27 self.data = None
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28 self.content = None
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29 self.execution_info = None
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30
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31 @property
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32 def app(self):
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33 return self.page.app
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34
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35
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36 class PageRenderingContext(object):
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37 def __init__(self, page, uri, page_num=1):
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38 self.page = page
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39 self.uri = uri
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40 self.page_num = page_num
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41 self.pagination_source = None
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42 self.pagination_filter = None
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43 self.custom_data = None
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44 self.use_cache = False
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45 self.used_pagination = None
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46 self.used_source_names = set()
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47 self.used_taxonomy_terms = set()
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48
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49 @property
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50 def app(self):
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51 return self.page.app
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52
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53 @property
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54 def slug(self):
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55 return get_slug(self.page.app, self.uri)
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56
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57 @property
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58 def source_metadata(self):
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59 return self.page.source_metadata
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60
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61 def reset(self):
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62 self.used_pagination = None
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63
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64 def setPagination(self, paginator):
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65 if self.used_pagination is not None:
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66 raise Exception("Pagination has already been used.")
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67 self.used_pagination = paginator
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68
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69 def addUsedSource(self, source):
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70 if isinstance(source, PageSource):
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71 self.used_source_names.add(source.name)
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72
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73
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74 def render_page(ctx):
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75 eis = ctx.app.env.exec_info_stack
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76 eis.pushPage(ctx.page, PHASE_PAGE_RENDERING, ctx)
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77 try:
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78 page = ctx.page
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79
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80 # Build the data for both segment and layout rendering.
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81 data_ctx = DataBuildingContext(page, ctx.uri, ctx.page_num)
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82 data_ctx.pagination_source = ctx.pagination_source
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83 data_ctx.pagination_filter = ctx.pagination_filter
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84 page_data = build_page_data(data_ctx)
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85 if ctx.custom_data:
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86 page_data.update(ctx.custom_data)
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87
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88 # Render content segments.
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89 repo = ctx.app.env.rendered_segments_repository
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90 if repo:
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91 cache_key = '%s:%s' % (ctx.uri, ctx.page_num)
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92 contents = repo.get(cache_key,
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93 lambda: _do_render_page_segments(page, page_data))
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94 else:
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95 contents = _do_render_page_segments(page, page_data)
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96
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97 # Render layout.
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98 layout_name = page.config.get('layout')
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99 if layout_name is None:
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100 layout_name = page.source.config.get('default_layout', 'default')
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101 null_names = ['', 'none', 'nil']
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102 if layout_name not in null_names:
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103 layout_data = build_layout_data(page, page_data, contents)
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104 output = render_layout(layout_name, page, layout_data)
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105 else:
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106 output = contents['content']
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107
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108 rp = RenderedPage(page, ctx.uri, ctx.page_num)
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109 rp.data = page_data
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110 rp.content = output
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111 rp.execution_info = eis.current_page_info
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112 return rp
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113 finally:
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114 eis.popPage()
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115
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116
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117 def render_page_segments(ctx):
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118 repo = ctx.app.env.rendered_segments_repository
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119 if repo:
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120 cache_key = '%s:%s' % (ctx.uri, ctx.page_num)
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121 return repo.get(cache_key,
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122 lambda: _do_render_page_segments_from_ctx(ctx))
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123
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124 return _do_render_page_segments_from_ctx(ctx)
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125
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126
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127 def _do_render_page_segments_from_ctx(ctx):
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128 eis = ctx.app.env.exec_info_stack
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129 eis.pushPage(ctx.page, PHASE_PAGE_FORMATTING, ctx)
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130 try:
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131 data_ctx = DataBuildingContext(ctx.page, ctx.uri, ctx.page_num)
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132 page_data = build_page_data(data_ctx)
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133 return _do_render_page_segments(ctx.page, page_data)
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134 finally:
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135 eis.popPage()
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136
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137
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138 def _do_render_page_segments(page, page_data):
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139 app = page.app
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140 engine_name = page.config.get('template_engine')
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141 format_name = page.config.get('format')
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142
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143 engine = get_template_engine(app, engine_name)
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144 if engine is None:
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145 raise PageRenderingError("Can't find template engine '%s'." % engine_name)
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146
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147 formatted_content = {}
5
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148 for seg_name, seg in page.raw_content.items():
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149 seg_text = ''
3
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150 for seg_part in seg.parts:
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151 part_format = seg_part.fmt or format_name
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152 part_text = engine.renderString(seg_part.content, page_data,
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153 filename=page.path, line_offset=seg_part.line)
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154 part_text = format_text(app, part_format, part_text)
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155 seg_text += part_text
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156 formatted_content[seg_name] = seg_text
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157
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158 if seg_name == 'content':
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159 m = content_abstract_re.search(seg_text)
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160 if m:
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161 offset = m.start()
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162 content_abstract = seg_text[:offset]
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163 formatted_content['content.abstract'] = content_abstract
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164
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165 return formatted_content
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166
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167
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168 def render_layout(layout_name, page, layout_data):
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169 names = layout_name.split(',')
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170 default_template_engine = get_template_engine(page.app, None)
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171 default_exts = ['.' + e.lstrip('.') for e in default_template_engine.EXTENSIONS]
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172 full_names = []
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173 for name in names:
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174 if '.' not in name:
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175 full_names.append(name + '.html')
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176 for ext in default_exts:
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177 full_names.append(name + ext)
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178 else:
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179 full_names.append(name)
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180
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181 _, engine_name = os.path.splitext(full_names[0])
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182 engine_name = engine_name.lstrip('.')
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183 engine = get_template_engine(page.app, engine_name)
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184 if engine is None:
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185 raise PageRenderingError("No such template engine: %s" % engine_name)
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186 output = engine.renderFile(full_names, layout_data)
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187 return output
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188
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189
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190 def get_template_engine(app, engine_name):
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191 if engine_name == 'html':
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192 engine_name = None
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193 engine_name = engine_name or app.config.get('site/default_template_engine')
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194 for engine in app.plugin_loader.getTemplateEngines():
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195 if engine_name in engine.ENGINE_NAMES:
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196 return engine
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197 return None
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198
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199 def format_text(app, format_name, txt):
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200 format_name = format_name or app.config.get('site/default_format')
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201 for fmt in app.plugin_loader.getFormatters():
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202 if fmt.FORMAT_NAMES is None or format_name in fmt.FORMAT_NAMES:
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203 txt = fmt.render(format_name, txt)
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204 if fmt.OUTPUT_FORMAT is not None:
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205 format_name = fmt.OUTPUT_FORMAT
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206 return txt
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207