Mercurial > piecrust2

annotate piecrust/templating/_inukshukext.py @ 1195:ae9387338db1 draft default tip

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admin: add option to publish immediately
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 30 Dec 2022 16:48:04 -0800
parents 10fd55b9ccfb
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1012
576f7ebcd9c0 templating: Add Inukshuk template engine.
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1 import io
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2 import re
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3 import time
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4 from inukshuk.ext import Extension, StatementNode
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5 from inukshuk.ext.core import filter_make_xml_date, filter_safe
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6 from inukshuk.lexer import (
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7 TOKEN_ID_STRING_SINGLE_QUOTES, TOKEN_ID_STRING_DOUBLE_QUOTES)
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8 from pygments import highlight
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9 from pygments.formatters import HtmlFormatter
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10 from pygments.lexers import get_lexer_by_name, guess_lexer
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11 from piecrust.data.paginator import Paginator
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12 from piecrust.rendering import format_text
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13
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14
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15 class PieCrustExtension(Extension):
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16 def __init__(self, app):
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17 self.app = app
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18
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19 def setupEngine(self, engine):
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20 engine.piecrust_app = self.app
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21 engine.piecrust_cache = {}
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22
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23 def getGlobals(self):
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24 return {
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25 'highlight_css': get_highlight_css}
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26
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27 def getFilters(self):
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28 return {
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29 'paginate': self._paginate,
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30 'formatwith': self._formatWith,
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31 'markdown': lambda v: self._formatWith(v, 'markdown'),
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32 'textile': lambda v: self._formatWith(v, 'textile'),
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33 'nocache': add_no_cache_parameter,
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34 'stripoutertag': strip_outer_tag,
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35 'stripslash': strip_slash,
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36 'atomdate': filter_make_xml_date,
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37 'raw': filter_safe
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38 }
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39
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40 def getTests(self):
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41 return {}
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42
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43 def getStatementNodes(self):
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44 return [
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45 PieCrustHighlightStatementNode,
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46 PieCrustGeshiStatementNode,
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47 PieCrustCacheStatementNode,
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48 PieCrustFormatStatementNode]
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49
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50 def _paginate(self, value, items_per_page=5):
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51 ctx = self.app.env.render_ctx_stack.current_ctx
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52 if ctx is None or ctx.page is None:
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53 raise Exception("Can't paginate when no page has been pushed "
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54 "on the execution stack.")
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55 return Paginator(value, ctx.page,
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56 sub_num=ctx.sub_num,
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57 items_per_page=items_per_page)
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58
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59 def _formatWith(self, value, format_name):
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60 return format_text(self.app, format_name, value)
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61
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62
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63 def add_no_cache_parameter(value, param_name='t', param_value=None):
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64 if not param_value:
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65 param_value = time.time()
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66 if '?' in value:
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67 value += '&'
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68 else:
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69 value += '?'
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70 value += '%s=%s' % (param_name, param_value)
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71 return value
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72
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73
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74 def strip_outer_tag(value, tag=None):
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75 tag_pattern = '[a-z]+[a-z0-9]*'
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76 if tag is not None:
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77 tag_pattern = re.escape(tag)
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78 pat = r'^\<' + tag_pattern + r'\>(.*)\</' + tag_pattern + '>$'
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79 m = re.match(pat, value)
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80 if m:
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81 return m.group(1)
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82 return value
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83
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84
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85 def strip_slash(value):
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86 return value.rstrip('/')
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87
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88
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89 class PieCrustFormatStatementNode(StatementNode):
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90 name = 'pcformat'
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91 compiler_imports = ['import io',
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92 'from piecrust.rendering import format_text']
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93
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94 def __init__(self):
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95 super().__init__()
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96 self.format = None
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97
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98 def parse(self, parser):
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99 self.format = parser.expectIdentifier()
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100 parser.skipWhitespace()
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101 parser.expectStatementEnd()
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102 parser.parseUntilStatement(self, ['endpcformat'])
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103 parser.expectIdentifier('endpcformat')
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104
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105 def render(self, ctx, data, out):
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106 with io.StringIO() as tmp:
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107 inner_out = tmp.write
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108 for c in self.children:
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109 c.render(ctx, data, inner_out)
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110
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111 text = format_text(ctx.engine.piecrust_app, self.format,
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112 tmp.getvalue(), exact_format=True)
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113 out(text)
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114
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115 def compile(self, ctx, out):
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116 out.indent().write('with io.StringIO() as tmp:\n')
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117 out.push(False)
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118 out.indent().write('prev_out_write = out_write\n')
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119 out.indent().write('out_write = tmp.write\n')
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120 for c in self.children:
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121 c.compile(ctx, out)
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122 out.indent().write('out_write = prev_out_write\n')
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123 out.indent().write(
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124 'text = format_text(ctx_engine.piecrust_app, %s, tmp.getvalue(), '
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125 'exact_format=True)\n' % repr(self.format))
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126 out.indent().write('out_write(text)\n')
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127 out.pull()
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128
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129
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130 class PieCrustHighlightStatementNode(StatementNode):
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131 name = 'highlight'
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132 endname = 'endhighlight'
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133 compiler_imports = [
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134 'from pygments import highlight',
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135 'from pygments.formatters import HtmlFormatter',
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136 'from pygments.lexers import get_lexer_by_name, guess_lexer']
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137
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138 def __init__(self):
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139 super().__init__()
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140 self.lang = None
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141
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142 def parse(self, parser):
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143 self.lang = parser.expectAny([TOKEN_ID_STRING_SINGLE_QUOTES,
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144 TOKEN_ID_STRING_DOUBLE_QUOTES])
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145 parser.skipWhitespace()
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diff changeset
146 parser.expectStatementEnd()
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147
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148 parser.parseUntilStatement(self, self.endname)
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149 parser.expectIdentifier(self.endname)
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150
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151 def render(self, ctx, data, out):
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152 with io.StringIO() as tmp:
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153 inner_out = tmp.write
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154 for c in self.children:
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155 c.render(ctx, data, inner_out)
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156
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157 raw_text = tmp.getvalue()
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158
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159 if self.lang is None:
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160 lexer = guess_lexer(raw_text)
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161 else:
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162 lexer = get_lexer_by_name(self.lang, stripall=False)
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163
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164 formatter = HtmlFormatter()
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165 code = highlight(raw_text, lexer, formatter)
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166 out(code)
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167
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168 def compile(self, ctx, out):
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169 out.indent().write('with io.StringIO() as tmp:\n')
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170 out.push(False)
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171 out.indent().write('prev_out_write = out_write\n')
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172 out.indent().write('out_write = tmp.write\n')
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173 for c in self.children:
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174 c.compile(ctx, out)
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175 out.indent().write('out_write = prev_out_write\n')
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176 out.indent().write('raw_text = tmp.getvalue()\n')
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177 out.pull()
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178 if self.lang is None:
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179 out.indent().write('lexer = guess_lexer(raw_text)\n')
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180 else:
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181 out.indent().write(
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parents:
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182 'lexer = get_lexer_by_name(%s, stripall=False)\n' %
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
183 repr(self.lang))
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parents:
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184 out.indent().write('formatter = HtmlFormatter()\n')
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parents:
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185 out.indent().write('code = highlight(raw_text, lexer, formatter)\n')
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parents:
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186 out.indent().write('out_write(code)\n')
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parents:
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187
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188
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Ludovic Chabant <ludovic@chabant.com>
parents:
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189 class PieCrustGeshiStatementNode(PieCrustHighlightStatementNode):
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parents:
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190 name = 'geshi'
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parents:
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191 endname = 'endgeshi'
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parents:
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192
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parents:
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193
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parents:
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194 def get_highlight_css(style_name='default', class_name='.highlight'):
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parents:
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195 return HtmlFormatter(style=style_name).get_style_defs(class_name)
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parents:
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196
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parents:
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197
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198 class PieCrustCacheStatementNode(StatementNode):
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199 name = 'pccache'
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parents:
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200 compiler_imports = ['import io']
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parents:
diff changeset
201
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diff changeset
202 def __init__(self):
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parents:
diff changeset
203 super().__init__()
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204 self.cache_key = None
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parents:
diff changeset
205
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Ludovic Chabant <ludovic@chabant.com>
parents:
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206 def parse(self, parser):
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Ludovic Chabant <ludovic@chabant.com>
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207 self.cache_key = parser.expectString()
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Ludovic Chabant <ludovic@chabant.com>
parents:
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208 parser.skipWhitespace()
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
209 parser.expectStatementEnd()
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parents:
diff changeset
210
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parents:
diff changeset
211 parser.parseUntilStatement(self, 'endpccache')
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
212 parser.expectIdentifier('endpccache')
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
213
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Ludovic Chabant <ludovic@chabant.com>
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diff changeset
214 def render(self, ctx, data, out):
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diff changeset
215 raise Exception("No implemented")
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216
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217 # exc_stack = ctx.engine.piecrust_app.env.exec_info_stack
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218 # render_ctx = exc_stack.current_page_info.render_ctx
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219 # rdr_pass = render_ctx.current_pass_info
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220
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parents:
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221 # pair = ctx.engine.piecrust_cache.get(self.cache_key)
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222 # if pair is not None:
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223 # rdr_pass.used_source_names.update(pair[1])
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224 # return pair[0]
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225
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226 # prev_used = rdr_pass.used_source_names.copy()
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227
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parents:
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228 # with io.StringIO() as tmp:
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Ludovic Chabant <ludovic@chabant.com>
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229 # inner_out = tmp.write
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Ludovic Chabant <ludovic@chabant.com>
parents:
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230 # for c in self.children:
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231 # c.render(ctx, data, inner_out)
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232
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233 # raw_text = tmp.getvalue()
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parents:
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234
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235 # after_used = rdr_pass.used_source_names.copy()
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parents:
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236 # used_delta = after_used.difference(prev_used)
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parents:
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237 # ctx.engine.piecrust_cache[self.cache_key] = (raw_text, used_delta)
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parents:
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238
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
239 # return raw_text
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parents:
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240
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parents:
diff changeset
241 def compile(self, ctx, out):
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parents:
diff changeset
242 out.indent().write(
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diff changeset
243 'ctx_stack = ctx.engine.piecrust_app.env.render_ctx_stack\n')
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parents:
diff changeset
244 out.indent().write(
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parents:
diff changeset
245 'render_ctx = ctx_stack.current_ctx\n')
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
246 out.indent().write(
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
247 'rdr_pass = render_ctx.current_pass_info\n')
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parents:
diff changeset
248
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parents:
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249 pair_var = ctx.varname('pair')
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
250 out.indent().write(
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
251 '%s = ctx.engine.piecrust_cache.get(%s)\n' %
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parents:
diff changeset
252 (pair_var, repr(self.cache_key)))
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parents:
diff changeset
253 out.indent().write(
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parents:
diff changeset
254 'if %s is not None:\n' % pair_var)
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parents:
diff changeset
255 out.push().write(
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
256 'rdr_pass.used_source_names.update(%s[1])\n' % pair_var)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
257 out.indent().write('out_write(%s[0])\n' % pair_var)
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
258 out.pull()
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
259 out.indent().write('else:\n')
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parents:
diff changeset
260
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parents:
diff changeset
261 tmp_var = ctx.varname('tmp')
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parents:
diff changeset
262 prev_used_var = ctx.varname('prev_used')
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Ludovic Chabant <ludovic@chabant.com>
parents:
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263 prev_out_write_var = ctx.varname('prev_out_write')
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264 prev_out_write_escaped_var = ctx.varname('prev_out_write_escaped')
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265
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266 out.push().write(
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267 '%s = rdr_pass.used_source_names.copy()\n' % prev_used_var)
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268 out.indent().write(
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269 'with io.StringIO() as %s:\n' % tmp_var)
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270 out.push().write(
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271 '%s = out_write\n' % prev_out_write_var)
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272 out.indent().write(
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parents:
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273 '%s = out_write_escaped\n' % prev_out_write_escaped_var)
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parents:
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274 out.indent().write(
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275 'out_write = %s.write\n' % tmp_var)
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parents:
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276 out.indent().write(
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parents:
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277 'out_write_escaped = ctx.engine._getWriteEscapeFunc(out_write)\n')
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parents:
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278 for c in self.children:
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279 c.compile(ctx, out)
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280
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281 out.indent().write(
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parents:
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282 'out_write_escaped = %s\n' % prev_out_write_escaped_var)
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parents:
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283 out.indent().write(
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parents:
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284 'out_write = %s\n' % prev_out_write_var)
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parents:
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285 out.indent().write(
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parents:
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286 'raw_text = %s.getvalue()\n' % tmp_var)
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Ludovic Chabant <ludovic@chabant.com>
parents:
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287 out.pull()
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parents:
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288
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parents:
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289 out.indent().write(
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parents:
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290 'after_used = rdr_pass.used_source_names.copy()\n')
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parents:
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291 out.indent().write(
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parents:
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292 'used_delta = after_used.difference(%s)\n' % prev_used_var)
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Ludovic Chabant <ludovic@chabant.com>
parents:
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293 out.indent().write(
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parents:
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294 'ctx.engine.piecrust_cache[%s] = (raw_text, used_delta)\n' %
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Ludovic Chabant <ludovic@chabant.com>
parents:
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295 repr(self.cache_key))
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parents:
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296 out.indent().write('out_write(raw_text)\n')
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Ludovic Chabant <ludovic@chabant.com>
parents:
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297 out.pull()