annotate src/tools/common/template.py @ 2401:221478058d8a

template: improved attribute escaping, and added it to filters under the name "attr_escape"
author Goffi <goffi@goffi.org>
date Fri, 27 Oct 2017 18:13:25 +0200
parents 7bfcc431f66d
children f905dfe69fcc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT: a jabber client
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5 # Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 """ template generation """
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21
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22 from sat.core.constants import Const as C
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23 from sat.core.i18n import _
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24 from sat.core import exceptions
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25 from sat.core.log import getLogger
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26 log = getLogger(__name__)
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27 import os.path
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28 from xml.sax.saxutils import quoteattr
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29 import time
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30 import re
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31 from babel import support
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32 from babel import Locale
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33 from babel.core import UnknownLocaleError
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34 try:
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35 import sat_templates
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36 except ImportError:
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37 raise exceptions.MissingModule(u'sat_templates module is not available, please install it or check your path to use template engine')
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38 else:
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39 sat_templates # to avoid pyflakes warning
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40
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41 try:
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42 import jinja2
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43 except:
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44 raise exceptions.MissingModule(u'Missing module jinja2, please install it from http://jinja.pocoo.org or with pip install jinja2')
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45
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46 from jinja2 import Markup as safe
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47
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48 HTML_EXT = ('html', 'xhtml')
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49 DEFAULT_LOCALE = u'en'
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50 RE_ATTR_ESCAPE = re.compile(r'[^a-z_-]')
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51 # TODO: handle external path (an additional search path for templates should be settable by user
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52 # TODO: handle absolute URL (should be used for trusted use cases) only (e.g. jp) for security reason
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53
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54
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55 class TemplateLoader(jinja2.FileSystemLoader):
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56
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57 def __init__(self):
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58 searchpath = os.path.dirname(sat_templates.__file__)
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59 super(TemplateLoader, self).__init__(searchpath, followlinks=True)
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60
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61 def parse_template(self, template):
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62 """parse template path and return theme and relative URL
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63
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64 @param template_path(unicode): path to template with parenthesis syntax
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65 @return (tuple[(unicode,None),unicode]): theme and template_path
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66 theme can be None if relative path is used
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67 relative path is the path from search path with theme specified
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68 e.g. default/blog/articles.html
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69 """
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70 if template.startswith(u'('):
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71 try:
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72 theme_end = template.index(u')')
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73 except IndexError:
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74 raise ValueError(u"incorrect theme in template")
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75 theme = template[1:theme_end]
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76 template = template[theme_end+1:]
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77 if not template or template.startswith(u'/'):
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78 raise ValueError(u"incorrect path after template name")
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79 template = os.path.join(theme, template)
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80 elif template.startswith(u'/'):
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81 # absolute path means no template
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82 theme = None
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83 raise NotImplementedError(u'absolute path is not implemented yet')
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84 else:
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85 theme = C.TEMPLATE_THEME_DEFAULT
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86 template = os.path.join(theme, template)
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87 return theme, template
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88
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89 def get_default_template(self, theme, template_path):
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90 """return default template path
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91
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92 @param theme(unicode): theme used
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93 @param template_path(unicode): path to the not found template
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94 @return (unicode, None): default path or None if there is not
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95 """
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96 ext = os.path.splitext(template_path)[1][1:]
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97 path_elems = template_path.split(u'/')
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98 if ext in HTML_EXT:
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99 if path_elems[1] == u'error':
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100 # if an inexisting error page is requested, we return base page
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101 default_path = os.path.join(theme, u'error/base.html')
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102 return default_path
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103 if theme != C.TEMPLATE_THEME_DEFAULT:
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104 # if template doesn't exists for this theme, we try with default
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105 return os.path.join(C.TEMPLATE_THEME_DEFAULT, path_elems[1:])
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106
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107 def get_source(self, environment, template):
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108 """relative path to template dir, with special theme handling
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109
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110 if the path is just relative, "default" theme is used.
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111 The theme can be specified in parenthesis just before the path
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112 e.g.: (some_theme)path/to/template.html
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113 """
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114 theme, template_path = self.parse_template(template)
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115 try:
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116 return super(TemplateLoader, self).get_source(environment, template_path)
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117 except jinja2.exceptions.TemplateNotFound as e:
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118 # in some special cases, a defaut template is returned if nothing is found
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119 if theme is not None:
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120 default_path = self.get_default_template(theme, template_path)
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121 if default_path is not None:
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122 return super(TemplateLoader, self).get_source(environment, default_path)
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123 # if no default template is found, we re-raise the error
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124 raise e
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125
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126
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127 class Indexer(object):
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128 """Index global to a page"""
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129
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130 def __init__(self):
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131 self._indexes = {}
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132
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133 def next(self, value):
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134 if value not in self._indexes:
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135 self._indexes[value] = 0
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136 return 0
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137 self._indexes[value] += 1
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138 return self._indexes[value]
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139
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140 def current(self, value):
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diff changeset
141 return self._indexes.get(value)
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142
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diff changeset
143
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diff changeset
144 class ScriptsHandler(object):
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parents: 2169
diff changeset
145
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146 def __init__(self, renderer, template_path, template_root_dir, root_path):
2245
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diff changeset
147 self.renderer = renderer
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diff changeset
148 self.template_root_dir = template_root_dir
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149 self.root_path = root_path
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diff changeset
150 self.scripts = [] # we don't use a set because order may be important
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diff changeset
151 dummy, self.theme, self.is_default_theme = renderer.getThemeData(template_path)
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152
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153 def include(self, library_name):
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diff changeset
154 """Mark that a script need to be imported.
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diff changeset
155
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diff changeset
156 Must be used before base.html is extended, as <script> are generated there.
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parents: 2249
diff changeset
157 If called several time with the same library, it will be imported once.
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parents: 2249
diff changeset
158 @param library_name(unicode): name of the library to import
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parents: 2249
diff changeset
159 """
2245
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diff changeset
160 if library_name.endswith('.js'):
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diff changeset
161 library_name = library_name[:-3]
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parents: 2169
diff changeset
162 if library_name not in self.scripts:
2265
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diff changeset
163 self.scripts.append(library_name)
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diff changeset
164 return u''
2245
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diff changeset
165
2265
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166 def generate_scripts(self):
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diff changeset
167 """Generate the <script> elements
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diff changeset
168
2245
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diff changeset
169 @return (unicode): <scripts> HTML tags
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diff changeset
170 """
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diff changeset
171 scripts = []
2265
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diff changeset
172 tpl = u'<script src={src}></script>'
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diff changeset
173 for library in self.scripts:
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diff changeset
174 path = self.renderer.getStaticPath(library, self.template_root_dir, self.theme, self.is_default_theme, '.js')
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diff changeset
175 if path is None:
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diff changeset
176 log.warning(_(u"Can't find {}.js javascript library").format(library))
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diff changeset
177 continue
2265
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diff changeset
178 path = os.path.join(self.root_path, path)
2245
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diff changeset
179 scripts.append(tpl.format(src=quoteattr(path)))
2265
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diff changeset
180 return safe(u'\n'.join(scripts))
2245
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diff changeset
181
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diff changeset
182
2159
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parents:
diff changeset
183 class Renderer(object):
5734b0994cf0 core (tools/common): template renderer first draft:
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parents:
diff changeset
184
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diff changeset
185 def __init__(self, host):
2159
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parents:
diff changeset
186 self.host = host
2169
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diff changeset
187 self.base_dir = os.path.dirname(sat_templates.__file__) # FIXME: should be modified if we handle use extra dirs
2159
5734b0994cf0 core (tools/common): template renderer first draft:
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parents:
diff changeset
188 self.env = jinja2.Environment(
2169
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diff changeset
189 loader=TemplateLoader(),
2159
5734b0994cf0 core (tools/common): template renderer first draft:
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diff changeset
190 autoescape=jinja2.select_autoescape(['html', 'xhtml', 'xml']),
5734b0994cf0 core (tools/common): template renderer first draft:
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diff changeset
191 trim_blocks=True,
5734b0994cf0 core (tools/common): template renderer first draft:
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diff changeset
192 lstrip_blocks=True,
2249
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diff changeset
193 extensions=['jinja2.ext.i18n'],
2159
5734b0994cf0 core (tools/common): template renderer first draft:
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parents:
diff changeset
194 )
2249
e572482f6cbd core (tools/common/template): i18n support
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diff changeset
195 self._locale_str = DEFAULT_LOCALE
e572482f6cbd core (tools/common/template): i18n support
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diff changeset
196 self._locale = Locale.parse(self._locale_str)
e572482f6cbd core (tools/common/template): i18n support
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parents: 2245
diff changeset
197 self.installTranslations()
2159
5734b0994cf0 core (tools/common): template renderer first draft:
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parents:
diff changeset
198 # we want to have access to SàT constants in templates
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diff changeset
199 self.env.globals[u'C'] = C
2245
e09048cb7595 core (tools/common/template): helping methods/filters for templates:
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diff changeset
200 # custom filters
e09048cb7595 core (tools/common/template): helping methods/filters for templates:
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diff changeset
201 self.env.filters['next_gidx'] = self._next_gidx
e09048cb7595 core (tools/common/template): helping methods/filters for templates:
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parents: 2169
diff changeset
202 self.env.filters['cur_gidx'] = self._cur_gidx
2266
084a75b8aa7a tools (common/template): changed blog_date filter to date_days
Goffi <goffi@goffi.org>
parents: 2265
diff changeset
203 self.env.filters['date_days'] = self._date_days
2384
d14c1a3e3244 template: new "xmlui_class" filter compute class names from name/values of requested fields.
Goffi <goffi@goffi.org>
parents: 2323
diff changeset
204 self.env.filters['xmlui_class'] = self._xmlui_class
2401
221478058d8a template: improved attribute escaping, and added it to filters under the name "attr_escape"
Goffi <goffi@goffi.org>
parents: 2394
diff changeset
205 self.env.filters['attr_escape'] = self.attr_escape
2391
07e1543d6992 template: new "adv_format" filter which use Python's format and return whole value if template is None
Goffi <goffi@goffi.org>
parents: 2385
diff changeset
206 self.env.filters['adv_format'] = self._adv_format
2159
5734b0994cf0 core (tools/common): template renderer first draft:
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parents:
diff changeset
207
2249
e572482f6cbd core (tools/common/template): i18n support
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diff changeset
208 def installTranslations(self):
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
209 i18n_dir = os.path.join(self.base_dir, 'i18n')
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
210 self.translations = {}
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
211 for lang_dir in os.listdir(i18n_dir):
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
212 lang_path = os.path.join(i18n_dir, lang_dir)
e572482f6cbd core (tools/common/template): i18n support
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parents: 2245
diff changeset
213 if not os.path.isdir(lang_path):
e572482f6cbd core (tools/common/template): i18n support
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parents: 2245
diff changeset
214 continue
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
215 po_path = os.path.join(lang_path, 'LC_MESSAGES/sat.mo')
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
216 try:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
217 with open(po_path, 'rb') as f:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
218 self.translations[Locale.parse(lang_dir)] = support.Translations(f, 'sat')
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
219 except EnvironmentError:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
220 log.error(_(u"Can't find template translation at {path}").format(path = po_path))
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
221 except UnknownLocaleError as e:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
222 log.error(_(u"Invalid locale name: {msg}").format(msg=e))
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
223 else:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
224 log.info(_(u'loaded {lang} templates translations').format(lang=lang_dir))
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
225 self.env.install_null_translations(True)
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
226
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
227 def setLocale(self, locale_str):
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
228 if locale_str == self._locale_str:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
229 return
2323
2dae79990122 template: print warning message and use DEFAULT_LOCALE on bad locale
Goffi <goffi@goffi.org>
parents: 2266
diff changeset
230 try:
2dae79990122 template: print warning message and use DEFAULT_LOCALE on bad locale
Goffi <goffi@goffi.org>
parents: 2266
diff changeset
231 locale = Locale.parse(locale_str)
2dae79990122 template: print warning message and use DEFAULT_LOCALE on bad locale
Goffi <goffi@goffi.org>
parents: 2266
diff changeset
232 except ValueError as e:
2dae79990122 template: print warning message and use DEFAULT_LOCALE on bad locale
Goffi <goffi@goffi.org>
parents: 2266
diff changeset
233 log.warning(_(u"invalid locale value: {msg}").format(msg=e))
2dae79990122 template: print warning message and use DEFAULT_LOCALE on bad locale
Goffi <goffi@goffi.org>
parents: 2266
diff changeset
234 locale_str = self._locale_str = DEFAULT_LOCALE
2dae79990122 template: print warning message and use DEFAULT_LOCALE on bad locale
Goffi <goffi@goffi.org>
parents: 2266
diff changeset
235 locale = Locale.parse(locale_str)
2dae79990122 template: print warning message and use DEFAULT_LOCALE on bad locale
Goffi <goffi@goffi.org>
parents: 2266
diff changeset
236
2249
e572482f6cbd core (tools/common/template): i18n support
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diff changeset
237 locale_str = unicode(locale)
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
238 if locale_str != DEFAULT_LOCALE:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
239 try:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
240 translations = self.translations[locale]
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
241 except KeyError:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
242 log.warning(_(u"Can't find locale {locale}".format(locale=locale)))
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
243 locale_str = DEFAULT_LOCALE
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
244 locale = Locale.parse(self._locale_str)
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
245 else:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
246 self.env.install_gettext_translations(translations, True)
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
247 log.debug(_(u'Switched to {lang}').format(lang=locale.english_name))
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
248
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
249 if locale_str == DEFAULT_LOCALE:
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
250 self.env.install_null_translations(True)
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
251
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
252 self._locale = locale
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
253 self._locale_str = locale_str
e572482f6cbd core (tools/common/template): i18n support
Goffi <goffi@goffi.org>
parents: 2245
diff changeset
254
2169
f472179305a1 tools(templates): workflow improvments:
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diff changeset
255 def getThemeAndRoot(self, template):
f472179305a1 tools(templates): workflow improvments:
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parents: 2159
diff changeset
256 """retrieve theme and root dir of a given tempalte
f472179305a1 tools(templates): workflow improvments:
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parents: 2159
diff changeset
257
f472179305a1 tools(templates): workflow improvments:
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parents: 2159
diff changeset
258 @param template(unicode): template to parse
f472179305a1 tools(templates): workflow improvments:
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diff changeset
259 @return (tuple[unicode, unicode]): theme and absolute path to theme's root dir
f472179305a1 tools(templates): workflow improvments:
Goffi <goffi@goffi.org>
parents: 2159
diff changeset
260 """
f472179305a1 tools(templates): workflow improvments:
Goffi <goffi@goffi.org>
parents: 2159
diff changeset
261 theme, dummy = self.env.loader.parse_template(template)
f472179305a1 tools(templates): workflow improvments:
Goffi <goffi@goffi.org>
parents: 2159
diff changeset
262 return theme, os.path.join(self.base_dir, theme)
f472179305a1 tools(templates): workflow improvments:
Goffi <goffi@goffi.org>
parents: 2159
diff changeset
263
2245
e09048cb7595 core (tools/common/template): helping methods/filters for templates:
Goffi <goffi@goffi.org>
parents: 2169
diff changeset
264 def getStaticPath(self, name, template_root_dir, theme, is_default, ext='.css'):
e09048cb7595 core (tools/common/template): helping methods/filters for templates:
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parents: 2169
diff changeset
265 """retrieve path of a static file if it exists with current theme or default
2169
f472179305a1 tools(templates): workflow improvments:
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diff changeset
266
2245
e09048cb7595 core (tools/common/template): helping methods/filters for templates:
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parents: 2169
diff changeset
267 File will be looked at [theme]/static/[name][ext], and then default
2169
f472179305a1 tools(templates): workflow improvments:
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diff changeset
268 if not found.
2245
e09048cb7595 core (tools/common/template): helping methods/filters for templates:
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parents: 2169
diff changeset
269 @param name(unicode): name of the file to look for
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270 @param template_root_dir(unicode): absolute path to template root used
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271 @param theme(unicode): name of the template theme used
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272 @param is_default(bool): True if theme is the default theme
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273 @return (unicode, None): relative path if found, else None
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274 """
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275 file_ = None
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276 path = os.path.join(theme, C.TEMPLATE_STATIC_DIR, name + ext)
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277 if os.path.exists(os.path.join(template_root_dir, path)):
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278 file_ = path
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279 elif not is_default:
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280 path = os.path.join(C.TEMPLATE_THEME_DEFAULT, C.TEMPLATE_STATIC_DIR, name + ext)
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281 if os.path.exists(os.path.join(template_root_dir, path)):
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282 file_.append(path)
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283 return file_
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284
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285 def getThemeData(self, template_path):
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286 """return template data got from template_path
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287
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288 @return tuple(unicde, unicode, bool):
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289 path_elems: elements of the path
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290 theme: theme of the page
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291 is_default: True if the theme is the default theme
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292 """
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293 path_elems = template_path.split(u'/')
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294 theme = path_elems.pop(0)
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295 is_default = theme == C.TEMPLATE_THEME_DEFAULT
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296 return (path_elems, theme, is_default)
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297
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298 def getCSSFiles(self, template_path, template_root_dir):
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299 """retrieve CSS files to use according to theme and template path
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300
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301 for each element of the path, a .css file is looked for in /static, and returned if it exists.
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302 previous element are kept by replacing '/' with '_', and styles.css is always returned.
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303 For instance, if template_path is some_theme/blog/articles.html:
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304 some_theme/static/styles.css is returned if it exists else default/static/styles.css
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305 some_theme/static/blog.css is returned if it exists else default/static/blog.css (if it exists too)
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306 some_theme/static/blog_articles.css is returned if it exists else default/static/blog_articles.css (if it exists too)
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307 @param template_path(unicode): relative path to template file (e.g. some_theme/blog/articles.html)
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308 @param template_root_dir(unicode): absolute path of the theme root dir used
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309 @return list[unicode]: relative path to CSS files to use
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310 """
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311 # TODO: some caching would be nice
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312 css_files = []
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313 path_elems, theme, is_default = self.getThemeData(template_path)
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314 for css in (u'fonts', u'styles'):
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315 css_path = self.getStaticPath(css, template_root_dir, theme, is_default)
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316 if css_path is not None:
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317 css_files.append(css_path)
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318
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319 for idx, path in enumerate(path_elems):
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320 css_path = self.getStaticPath(u'_'.join(path_elems[:idx+1]), template_root_dir, theme, is_default)
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321 if css_path is not None:
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322 css_files.append(css_path)
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323
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324 return css_files
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325
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326 @jinja2.contextfilter
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327 def _next_gidx(self, ctx, value):
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328 """Use next current global index as suffix"""
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329 next_ = ctx['gidx'].next(value)
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330 return value if next_ == 0 else u"{}_{}".format(value, next_)
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331
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332 @jinja2.contextfilter
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333 def _cur_gidx(self, ctx, value):
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334 """Use current current global index as suffix"""
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335 current = ctx['gidx'].current(value)
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336 return value if not current else u"{}_{}".format(value, current)
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337
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338 def _date_days(self, timestamp):
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339 return int(time.time() - int(timestamp))/(3600*24)
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340
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341 def attr_escape(self, text):
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342 """escape a text to a value usable as an attribute
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343
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344 remove spaces, and put in lower case
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345 """
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346 return RE_ATTR_ESCAPE.sub(u'_', text.strip().lower())[:50]
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347
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348 def _xmlui_class(self, xmlui_item, fields):
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349 """return classes computed from XMLUI fields name
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350
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351 will return a string with a series of escaped {name}_{value} separated by spaces.
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352 @param xmlui_item(xmlui.XMLUIPanel): XMLUI containing the widgets to use
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353 @param fields(iterable(unicode)): names of the widgets to use
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354 @return (unicode, None): computer string to use as class attribute value
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355 None if no field was specified
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356 """
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357 classes = []
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358 for name in fields:
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359 escaped_name = self.attr_escape(name)
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360 try:
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361 for value in xmlui_item.widgets[name].values:
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362 classes.append(escaped_name + '_' + self.attr_escape(value))
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363 except KeyError:
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364 log.debug(_(u"ignoring field \"{name}\": it doesn't exists").format(name=name))
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365 continue
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366 return u' '.join(classes) or None
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367
2391
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368 def _adv_format(self, value, template, **kwargs):
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369 """Advancer formatter
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370
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371 like format() method, but take care or special values like None
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372 @param value(unicode): value to format
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373 @param template(None, unicode): template to use with format() method.
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374 It will be formatted using value=value and **kwargs
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375 None to return value unchanged
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376 @return (unicode): formatted value
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377 """
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378 if template is None:
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379 return value
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380 # jinja use string when no special char is used, so we have to convert to unicode
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381 return unicode(template).format(value=value, **kwargs)
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382
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383 def render(self, template, theme=None, locale=DEFAULT_LOCALE, root_path=u'', media_path=u'', css_files=None, css_inline=False, **kwargs):
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384 """render a template
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385
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386 @param template(unicode): template to render (e.g. blog/articles.html)
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387 @param theme(unicode): template theme
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388 @param root_path(unicode): prefix of the path/URL to use for template root
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389 must end with a u'/'
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390 @param media_path(unicode): prefix of the SàT media path/URL to use for template root
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391 must end with a u'/'
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392 @param css_files(list[unicode],None): CSS files to used
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393 CSS files must be in static dir of the template
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394 use None for automatic selection of CSS files based on template category
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395 None is recommended. General static/style.css and theme file name will be used.
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396 @param css_inline(bool): if True, CSS will be embedded in the HTML page
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397 @param **kwargs: variable to transmit to the template
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398 """
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399 if not template:
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400 raise ValueError(u"template can't be empty")
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401 if theme is not None:
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402 # use want to set a theme, we add it to the template path
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403 if template[0] == u'(':
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404 raise ValueError(u"you can't specify theme in template path and in argument at the same time")
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405 elif template[0] == u'/':
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406 raise ValueError(u"you can't specify theme with absolute paths")
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407 template= u'(' + theme + u')' + template
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408 else:
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409 theme, dummy = self.env.loader.parse_template(template)
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410
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411 template_source = self.env.get_template(template)
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412 template_root_dir = os.path.normpath(self.base_dir) # FIXME: should be modified if we handle use extra dirs
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413 # XXX: template_path may have a different theme as first element than theme if a default page is used
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414 template_path = template_source.filename[len(template_root_dir)+1:]
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415
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416 if css_files is None:
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417 css_files = self.getCSSFiles(template_path, template_root_dir)
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418
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419 if css_inline:
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420 css_contents = []
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421 for css_file in css_files:
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422 css_file_path = os.path.join(template_root_dir, css_file)
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423 with open(css_file_path) as f:
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424 css_contents.append(f.read())
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425 if css_contents:
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426 kwargs['css_content'] = '\n'.join(css_contents)
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427
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428 scripts_handler = ScriptsHandler(self, template_path, template_root_dir, root_path)
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429 self.setLocale(locale)
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430 # XXX: theme used in template arguments is the requested theme, which may differ from actual theme
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431 # if the template doesn't exist in the requested theme.
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432 return template_source.render(theme=theme, root_path=root_path, media_path=media_path, css_files=css_files, locale=self._locale, gidx=Indexer(), script=scripts_handler, **kwargs)