Mercurial > piecrust2

annotate piecrust/rendering.py @ 298:b7ab1b503510

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data: Fix incorrect next/previous page URLs in pagination data. Consolidate splitting an URL between its first URL and its sub page number. Be careful about the index page's URL not losing its slash.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 11 Mar 2015 23:46:42 -0700
parents 27d623a241c6
children 65e6d72f3877
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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10
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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 TemplateEngineNotFound(Exception):
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23 pass
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25
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26 class RenderedPage(object):
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27 def __init__(self, page, uri, num=1):
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28 self.page = page
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29 self.uri = uri
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30 self.num = num
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31 self.data = None
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32 self.content = None
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33 self.execution_info = None
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34
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35 @property
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36 def app(self):
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37 return self.page.app
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39
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40 PASS_NONE = 0
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41 PASS_FORMATTING = 1
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42 PASS_RENDERING = 2
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44
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45 class PageRenderingContext(object):
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46 def __init__(self, page, uri, page_num=1, force_render=False):
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47 self.page = page
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48 self.uri = uri
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49 self.page_num = page_num
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50 self.force_render = force_render
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51 self.pagination_source = None
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52 self.pagination_filter = None
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53 self.custom_data = None
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54 self.use_cache = False
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55 self.used_assets = None
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56 self.used_pagination = None
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57 self.used_source_names = set()
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58 self.used_taxonomy_terms = set()
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59 self.current_pass = PASS_NONE
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60
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61 @property
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62 def app(self):
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63 return self.page.app
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64
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65 @property
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66 def slug(self):
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67 return get_slug(self.page.app, self.uri)
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68
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69 @property
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70 def source_metadata(self):
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71 return self.page.source_metadata
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72
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73 def reset(self):
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74 self.used_pagination = None
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75
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76 def setPagination(self, paginator):
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77 if self.used_pagination is not None:
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78 raise Exception("Pagination has already been used.")
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79 self.used_pagination = paginator
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80 self.addUsedSource(paginator._source)
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81
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82 def addUsedSource(self, source):
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83 if isinstance(source, PageSource):
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84 self.used_source_names.add((source.name, self.current_pass))
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85
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86
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87 def render_page(ctx):
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88 eis = ctx.app.env.exec_info_stack
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89 eis.pushPage(ctx.page, ctx)
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90 try:
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91 page = ctx.page
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92
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93 # Build the data for both segment and layout rendering.
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94 data_ctx = DataBuildingContext(page, ctx.uri, ctx.page_num)
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95 data_ctx.pagination_source = ctx.pagination_source
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96 data_ctx.pagination_filter = ctx.pagination_filter
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97 page_data = build_page_data(data_ctx)
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98 if ctx.custom_data:
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99 page_data.update(ctx.custom_data)
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100
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101 # Render content segments.
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102 ctx.current_pass = PASS_FORMATTING
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103 repo = ctx.app.env.rendered_segments_repository
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104 if repo and not ctx.force_render:
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105 cache_key = '%s:%s' % (ctx.uri, ctx.page_num)
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106 page_time = page.path_mtime
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107 contents = repo.get(
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108 cache_key,
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109 lambda: _do_render_page_segments(page, page_data),
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110 fs_cache_time=page_time)
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111 else:
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112 contents = _do_render_page_segments(page, page_data)
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113
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114 # Render layout.
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115 ctx.current_pass = PASS_RENDERING
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116 layout_name = page.config.get('layout')
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117 if layout_name is None:
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118 layout_name = page.source.config.get('default_layout', 'default')
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119 null_names = ['', 'none', 'nil']
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120 if layout_name not in null_names:
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121 layout_data = build_layout_data(page, page_data, contents)
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122 output = render_layout(layout_name, page, layout_data)
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123 else:
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124 output = contents['content']
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125
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126 rp = RenderedPage(page, ctx.uri, ctx.page_num)
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127 rp.data = page_data
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128 rp.content = output
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129 rp.execution_info = eis.current_page_info
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130 return rp
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131 finally:
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132 ctx.current_pass = PASS_NONE
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133 eis.popPage()
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134
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135
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136 def render_page_segments(ctx):
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137 repo = ctx.app.env.rendered_segments_repository
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138 if repo:
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139 cache_key = '%s:%s' % (ctx.uri, ctx.page_num)
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140 return repo.get(cache_key,
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141 lambda: _do_render_page_segments_from_ctx(ctx),
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142 fs_cache_time=ctx.page.path_mtime)
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143
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144 return _do_render_page_segments_from_ctx(ctx)
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145
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146
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147 def _do_render_page_segments_from_ctx(ctx):
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148 eis = ctx.app.env.exec_info_stack
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149 eis.pushPage(ctx.page, ctx)
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150 ctx.current_pass = PASS_FORMATTING
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151 try:
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152 data_ctx = DataBuildingContext(ctx.page, ctx.uri, ctx.page_num)
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153 page_data = build_page_data(data_ctx)
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154 return _do_render_page_segments(ctx.page, page_data)
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155 finally:
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156 ctx.current_pass = PASS_NONE
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157 eis.popPage()
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158
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159
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160 def _do_render_page_segments(page, page_data):
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161 app = page.app
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162 engine_name = page.config.get('template_engine')
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163 format_name = page.config.get('format')
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164
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165 engine = get_template_engine(app, engine_name)
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166
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167 formatted_content = {}
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168 for seg_name, seg in page.raw_content.items():
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169 seg_text = ''
3
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170 for seg_part in seg.parts:
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171 part_format = seg_part.fmt or format_name
128
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172 try:
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173 part_text = engine.renderString(
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174 seg_part.content, page_data,
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175 filename=page.path)
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176 except TemplatingError as err:
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177 err.lineno += seg_part.line
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178 raise err
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179
3
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180 part_text = format_text(app, part_format, part_text)
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181 seg_text += part_text
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182 formatted_content[seg_name] = seg_text
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183
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184 if seg_name == 'content':
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185 m = content_abstract_re.search(seg_text)
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186 if m:
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187 offset = m.start()
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188 content_abstract = seg_text[:offset]
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189 formatted_content['content.abstract'] = content_abstract
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190
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191 return formatted_content
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192
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193
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194 def render_layout(layout_name, page, layout_data):
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195 names = layout_name.split(',')
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196 default_template_engine = get_template_engine(page.app, None)
183
fff195335d0a render: When a template engine can't be found, show the correct name in the error.
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diff changeset
197 default_exts = ['.' + e.lstrip('.')
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diff changeset
198 for e in default_template_engine.EXTENSIONS]
3
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199 full_names = []
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200 for name in names:
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201 if '.' not in name:
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202 for ext in default_exts:
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203 full_names.append(name + ext)
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204 else:
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205 full_names.append(name)
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206
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207 _, engine_name = os.path.splitext(full_names[0])
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208 engine_name = engine_name.lstrip('.')
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209 engine = get_template_engine(page.app, engine_name)
183
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diff changeset
210
153
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diff changeset
211 try:
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diff changeset
212 output = engine.renderFile(full_names, layout_data)
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diff changeset
213 except TemplateNotFoundError as ex:
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diff changeset
214 msg = "Can't find template for page: %s\n" % page.path
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diff changeset
215 msg += "Looked for: %s" % ', '.join(full_names)
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diff changeset
216 raise Exception(msg) from ex
3
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217 return output
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218
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219
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220 def get_template_engine(app, engine_name):
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221 if engine_name == 'html':
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222 engine_name = None
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223 engine_name = engine_name or app.config.get('site/default_template_engine')
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224 for engine in app.plugin_loader.getTemplateEngines():
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225 if engine_name in engine.ENGINE_NAMES:
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226 return engine
183
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diff changeset
227 raise TemplateEngineNotFound("No such template engine: %s" % engine_name)
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diff changeset
228
3
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229
128
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diff changeset
230 def format_text(app, format_name, txt, exact_format=False):
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diff changeset
231 if exact_format and not format_name:
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diff changeset
232 raise Exception("You need to specify a format name.")
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diff changeset
233
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diff changeset
234 format_count = 0
3
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235 format_name = format_name or app.config.get('site/default_format')
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236 for fmt in app.plugin_loader.getFormatters():
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237 if fmt.FORMAT_NAMES is None or format_name in fmt.FORMAT_NAMES:
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238 txt = fmt.render(format_name, txt)
128
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diff changeset
239 format_count += 1
3
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240 if fmt.OUTPUT_FORMAT is not None:
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241 format_name = fmt.OUTPUT_FORMAT
128
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diff changeset
242 if exact_format and format_count == 0:
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diff changeset
243 raise Exception("No such format: %s" % format_name)
3
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244 return txt
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245