Mercurial > piecrust2

annotate piecrust/rendering.py @ 173:0a86a7a6b284

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routes: Actually match metadata when finding routes, fix problems with paths. When we look for a route that matches a given page, we now look at the source metadata that comes with that page, and compare it to the metadata we need to build URIs. Also, when matching URIs, we handle the case where a 'path'-component in our pattern may be completely empty, and thus we may be missing some trailing slashes in the URI.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 03 Jan 2015 21:10:44 -0800
parents 1187739e5a19
children e9a3d405e18f
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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.sources.base import PageSource
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7 from piecrust.templating.base import TemplateNotFoundError, TemplatingError
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8 from piecrust.uriutil import get_slug
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11 logger = logging.getLogger(__name__)
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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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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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36 PASS_NONE = 0
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37 PASS_FORMATTING = 1
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38 PASS_RENDERING = 2
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40
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41 class PageRenderingContext(object):
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42 def __init__(self, page, uri, page_num=1):
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43 self.page = page
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44 self.uri = uri
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45 self.page_num = page_num
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46 self.pagination_source = None
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47 self.pagination_filter = None
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48 self.custom_data = None
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49 self.use_cache = False
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50 self.used_assets = None
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51 self.used_pagination = None
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52 self.used_source_names = set()
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53 self.used_taxonomy_terms = set()
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54 self.current_pass = PASS_NONE
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55
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56 @property
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57 def app(self):
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58 return self.page.app
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59
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60 @property
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61 def slug(self):
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62 return get_slug(self.page.app, self.uri)
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63
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64 @property
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65 def source_metadata(self):
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66 return self.page.source_metadata
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67
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68 def reset(self):
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69 self.used_pagination = None
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70
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71 def setPagination(self, paginator):
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72 if self.used_pagination is not None:
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73 raise Exception("Pagination has already been used.")
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74 self.used_pagination = paginator
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75 self.addUsedSource(paginator._source)
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76
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77 def addUsedSource(self, source):
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78 if isinstance(source, PageSource):
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79 self.used_source_names.add((source.name, self.current_pass))
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81
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82 def render_page(ctx):
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83 eis = ctx.app.env.exec_info_stack
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84 eis.pushPage(ctx.page, ctx)
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85 try:
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86 page = ctx.page
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87
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88 # Build the data for both segment and layout rendering.
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89 data_ctx = DataBuildingContext(page, ctx.uri, ctx.page_num)
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90 data_ctx.pagination_source = ctx.pagination_source
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91 data_ctx.pagination_filter = ctx.pagination_filter
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92 page_data = build_page_data(data_ctx)
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93 if ctx.custom_data:
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94 page_data.update(ctx.custom_data)
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95
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96 # Render content segments.
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97 ctx.current_pass = PASS_FORMATTING
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98 repo = ctx.app.env.rendered_segments_repository
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99 if repo:
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100 cache_key = '%s:%s' % (ctx.uri, ctx.page_num)
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101 page_time = page.path_mtime
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102 contents = repo.get(
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103 cache_key,
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104 lambda: _do_render_page_segments(page, page_data),
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105 fs_cache_time=page_time)
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106 else:
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107 contents = _do_render_page_segments(page, page_data)
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108
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109 # Render layout.
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110 ctx.current_pass = PASS_RENDERING
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111 layout_name = page.config.get('layout')
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112 if layout_name is None:
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113 layout_name = page.source.config.get('default_layout', 'default')
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114 null_names = ['', 'none', 'nil']
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115 if layout_name not in null_names:
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116 layout_data = build_layout_data(page, page_data, contents)
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117 output = render_layout(layout_name, page, layout_data)
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118 else:
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119 output = contents['content']
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120
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121 rp = RenderedPage(page, ctx.uri, ctx.page_num)
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122 rp.data = page_data
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123 rp.content = output
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124 rp.execution_info = eis.current_page_info
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125 return rp
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126 finally:
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127 ctx.current_pass = PASS_NONE
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128 eis.popPage()
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129
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130
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131 def render_page_segments(ctx):
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132 repo = ctx.app.env.rendered_segments_repository
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133 if repo:
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134 cache_key = '%s:%s' % (ctx.uri, ctx.page_num)
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135 return repo.get(cache_key,
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136 lambda: _do_render_page_segments_from_ctx(ctx),
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137 fs_cache_time=ctx.page.path_mtime)
3
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138
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139 return _do_render_page_segments_from_ctx(ctx)
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140
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141
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142 def _do_render_page_segments_from_ctx(ctx):
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143 eis = ctx.app.env.exec_info_stack
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144 eis.pushPage(ctx.page, ctx)
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145 ctx.current_pass = PASS_FORMATTING
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146 try:
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147 data_ctx = DataBuildingContext(ctx.page, ctx.uri, ctx.page_num)
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148 page_data = build_page_data(data_ctx)
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149 return _do_render_page_segments(ctx.page, page_data)
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150 finally:
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151 ctx.current_pass = PASS_NONE
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152 eis.popPage()
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153
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154
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155 def _do_render_page_segments(page, page_data):
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156 app = page.app
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157 engine_name = page.config.get('template_engine')
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158 format_name = page.config.get('format')
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159
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160 engine = get_template_engine(app, engine_name)
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161 if engine is None:
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162 raise PageRenderingError("Can't find template engine '%s'." % engine_name)
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163
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164 formatted_content = {}
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165 for seg_name, seg in page.raw_content.items():
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166 seg_text = ''
3
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167 for seg_part in seg.parts:
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168 part_format = seg_part.fmt or format_name
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169 try:
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170 part_text = engine.renderString(
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171 seg_part.content, page_data,
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172 filename=page.path)
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173 except TemplatingError as err:
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174 err.lineno += seg_part.line
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175 raise err
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176
3
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177 part_text = format_text(app, part_format, part_text)
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178 seg_text += part_text
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179 formatted_content[seg_name] = seg_text
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180
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181 if seg_name == 'content':
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182 m = content_abstract_re.search(seg_text)
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183 if m:
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184 offset = m.start()
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185 content_abstract = seg_text[:offset]
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186 formatted_content['content.abstract'] = content_abstract
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187
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188 return formatted_content
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189
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190
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191 def render_layout(layout_name, page, layout_data):
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192 names = layout_name.split(',')
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193 default_template_engine = get_template_engine(page.app, None)
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194 default_exts = ['.' + e.lstrip('.') for e in default_template_engine.EXTENSIONS]
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195 full_names = []
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196 for name in names:
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197 if '.' not in name:
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198 full_names.append(name + '.html')
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199 for ext in default_exts:
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200 full_names.append(name + ext)
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201 else:
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202 full_names.append(name)
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203
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204 _, engine_name = os.path.splitext(full_names[0])
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205 engine_name = engine_name.lstrip('.')
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206 engine = get_template_engine(page.app, engine_name)
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207 if engine is None:
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208 raise PageRenderingError("No such template engine: %s" % engine_name)
153
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209 try:
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210 output = engine.renderFile(full_names, layout_data)
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211 except TemplateNotFoundError as ex:
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212 msg = "Can't find template for page: %s\n" % page.path
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213 msg += "Looked for: %s" % ', '.join(full_names)
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214 raise Exception(msg) from ex
3
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215 return output
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216
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217
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218 def get_template_engine(app, engine_name):
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219 if engine_name == 'html':
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220 engine_name = None
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221 engine_name = engine_name or app.config.get('site/default_template_engine')
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222 for engine in app.plugin_loader.getTemplateEngines():
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223 if engine_name in engine.ENGINE_NAMES:
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224 return engine
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225 return None
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226
128
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227 def format_text(app, format_name, txt, exact_format=False):
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228 if exact_format and not format_name:
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229 raise Exception("You need to specify a format name.")
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230
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231 format_count = 0
3
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232 format_name = format_name or app.config.get('site/default_format')
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233 for fmt in app.plugin_loader.getFormatters():
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234 if fmt.FORMAT_NAMES is None or format_name in fmt.FORMAT_NAMES:
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235 txt = fmt.render(format_name, txt)
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236 format_count += 1
3
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237 if fmt.OUTPUT_FORMAT is not None:
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238 format_name = fmt.OUTPUT_FORMAT
128
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diff changeset
239 if exact_format and format_count == 0:
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240 raise Exception("No such format: %s" % format_name)
3
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241 return txt
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242