Mercurial > piecrust2

annotate piecrust/rendering.py @ 147:ab6e7e0e9d44

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Pass date information to routing when building URLs. This is so that URLs with dates in them can be built even when the date information is not coming from the source metadata, but from the page's config.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 29 Nov 2014 21:00:44 -0800
parents 28444014ce7d
children 1c3d229158ba
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.sources.base import PageSource
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7 from piecrust.templating.base import TemplatingError
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8 from piecrust.uriutil import get_slug
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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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17
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18 class PageRenderingError(Exception):
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19 pass
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20
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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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35
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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
3
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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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80
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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(cache_key,
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103 lambda: _do_render_page_segments(page, page_data),
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104 fs_cache_time=page_time)
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105 else:
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106 contents = _do_render_page_segments(page, page_data)
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107
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108 # Render layout.
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109 ctx.current_pass = PASS_RENDERING
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110 layout_name = page.config.get('layout')
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111 if layout_name is None:
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112 layout_name = page.source.config.get('default_layout', 'default')
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113 null_names = ['', 'none', 'nil']
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114 if layout_name not in null_names:
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115 layout_data = build_layout_data(page, page_data, contents)
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116 output = render_layout(layout_name, page, layout_data)
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117 else:
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118 output = contents['content']
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119
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120 rp = RenderedPage(page, ctx.uri, ctx.page_num)
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121 rp.data = page_data
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122 rp.content = output
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123 rp.execution_info = eis.current_page_info
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124 return rp
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125 finally:
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126 ctx.current_pass = PASS_NONE
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127 eis.popPage()
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128
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129
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130 def render_page_segments(ctx):
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131 repo = ctx.app.env.rendered_segments_repository
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132 if repo:
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133 cache_key = '%s:%s' % (ctx.uri, ctx.page_num)
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134 return repo.get(cache_key,
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135 lambda: _do_render_page_segments_from_ctx(ctx),
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136 fs_cache_time=ctx.page.path_mtime)
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137
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138 return _do_render_page_segments_from_ctx(ctx)
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139
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140
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141 def _do_render_page_segments_from_ctx(ctx):
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142 eis = ctx.app.env.exec_info_stack
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143 eis.pushPage(ctx.page, ctx)
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144 ctx.current_pass = PASS_FORMATTING
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145 try:
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146 data_ctx = DataBuildingContext(ctx.page, ctx.uri, ctx.page_num)
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147 page_data = build_page_data(data_ctx)
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148 return _do_render_page_segments(ctx.page, page_data)
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149 finally:
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150 ctx.current_pass = PASS_NONE
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151 eis.popPage()
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152
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153
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154 def _do_render_page_segments(page, page_data):
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155 app = page.app
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156 engine_name = page.config.get('template_engine')
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157 format_name = page.config.get('format')
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158
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159 engine = get_template_engine(app, engine_name)
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160 if engine is None:
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161 raise PageRenderingError("Can't find template engine '%s'." % engine_name)
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162
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163 formatted_content = {}
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164 for seg_name, seg in page.raw_content.items():
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165 seg_text = ''
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166 for seg_part in seg.parts:
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167 part_format = seg_part.fmt or format_name
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168 try:
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169 part_text = engine.renderString(
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170 seg_part.content, page_data,
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171 filename=page.path)
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172 except TemplatingError as err:
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173 err.lineno += seg_part.line
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174 raise err
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175
3
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176 part_text = format_text(app, part_format, part_text)
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177 seg_text += part_text
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178 formatted_content[seg_name] = seg_text
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179
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180 if seg_name == 'content':
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181 m = content_abstract_re.search(seg_text)
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182 if m:
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183 offset = m.start()
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184 content_abstract = seg_text[:offset]
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185 formatted_content['content.abstract'] = content_abstract
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186
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187 return formatted_content
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188
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189
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190 def render_layout(layout_name, page, layout_data):
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191 names = layout_name.split(',')
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192 default_template_engine = get_template_engine(page.app, None)
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193 default_exts = ['.' + e.lstrip('.') for e in default_template_engine.EXTENSIONS]
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194 full_names = []
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195 for name in names:
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196 if '.' not in name:
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197 full_names.append(name + '.html')
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198 for ext in default_exts:
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199 full_names.append(name + ext)
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200 else:
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201 full_names.append(name)
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202
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203 _, engine_name = os.path.splitext(full_names[0])
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204 engine_name = engine_name.lstrip('.')
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205 engine = get_template_engine(page.app, engine_name)
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206 if engine is None:
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207 raise PageRenderingError("No such template engine: %s" % engine_name)
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208 output = engine.renderFile(full_names, layout_data)
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209 return output
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210
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211
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212 def get_template_engine(app, engine_name):
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213 if engine_name == 'html':
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214 engine_name = None
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215 engine_name = engine_name or app.config.get('site/default_template_engine')
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216 for engine in app.plugin_loader.getTemplateEngines():
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217 if engine_name in engine.ENGINE_NAMES:
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218 return engine
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219 return None
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220
128
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221 def format_text(app, format_name, txt, exact_format=False):
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222 if exact_format and not format_name:
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223 raise Exception("You need to specify a format name.")
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224
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225 format_count = 0
3
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226 format_name = format_name or app.config.get('site/default_format')
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227 for fmt in app.plugin_loader.getFormatters():
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228 if fmt.FORMAT_NAMES is None or format_name in fmt.FORMAT_NAMES:
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229 txt = fmt.render(format_name, txt)
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230 format_count += 1
3
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231 if fmt.OUTPUT_FORMAT is not None:
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232 format_name = fmt.OUTPUT_FORMAT
128
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diff changeset
233 if exact_format and format_count == 0:
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234 raise Exception("No such format: %s" % format_name)
3
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235 return txt
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236