annotate src/plugins/plugin_misc_text_syntaxes.py @ 699:e819630c6737

plugin text syntaxes: fixed bad parameter order for getParamA
author Goffi <goffi@goffi.org>
date Wed, 13 Nov 2013 14:00:07 +0100
parents ddd2781bdd8c
children a25db3fe3959
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/python
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2 # -*- coding: utf-8 -*-
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3
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4 # SAT plugin for managing various text syntaxes
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013 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 from logging import debug, info, error, warning
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21
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22 from wokkel import disco, pubsub
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23 from twisted.internet import defer
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24 from twisted.internet.threads import deferToThread
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25 from lxml import html
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26 from lxml.html import clean
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27 import re
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29
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30 CATEGORY = "Composition"
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31 NAME = "Syntax"
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32 _SYNTAX_XHTML = "XHTML"
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33 # TODO: check/adapt following list
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34 STYLES_WHITELIST = ["azimuth", "background-color", "border-bottom-color", "border-collapse", "border-color", "border-left-color", "border-right-color", "border-top-color", "clear", "color", "cursor", "direction", "display", "elevation", "float", "font", "font-family", "font-size", "font-style", "font-variant", "font-weight", "height", "letter-spacing", "line-height", "overflow", "pause", "pause-after", "pause-before", "pitch", "pitch-range", "richness", "speak", "speak-header", "speak-numeral", "speak-punctuation", "speech-rate", "stress", "text-align", "text-decoration", "text-indent", "unicode-bidi", "vertical-align", "voice-family", "volume", "white-space", "width"] # based on feedparser list (http://pythonhosted.org/feedparser/html-sanitization.html)
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35
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36 SAFE_ATTRS = html.defs.safe_attrs.union(('style',))
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37 STYLES_VALUES_REGEX = r'^(' + '|'.join(['([a-z-]+)', # alphabetical names
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38 '(#[0-9a-f]+)', # hex value
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39 '(\d+(.\d+)? *(|%|em|ex|px|in|cm|mm|pt|pc))', # values with units (or not)
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40 'rgb\( *((\d+(.\d+)?), *){2}(\d+(.\d+)?) *\)', # rgb function
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41 'rgba\( *((\d+(.\d+)?), *){3}(\d+(.\d+)?) *\)', # rgba function
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42 ]) + ') *(!important)?$' # we accept "!important" at the end
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43 STYLES_ACCEPTED_VALUE = re.compile(STYLES_VALUES_REGEX)
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44
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45 PLUGIN_INFO = {
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46 "name": "Text syntaxes",
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47 "import_name": "TEXT-SYNTAXES",
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48 "type": "MISC",
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49 "protocols": [],
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50 "dependencies": [],
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51 "main": "TextSyntaxes",
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52 "handler": "no",
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53 "description": _("""Management of various text syntaxes (XHTML-IM, Markdown, etc)""")
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54 }
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55
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56 class UnknownSyntax(Exception):
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57 pass
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58
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59 class TextSyntaxes(object):
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60 """ Text conversion class
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61 XHTML utf-8 is used as intermediate language for conversions
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62 """
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63
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64 OPT_DEFAULT = "DEFAULT"
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65 OPT_HIDDEN = "HIDDEN"
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66 OPT_NO_THREAD = "NO_THREAD"
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67 SYNTAX_XHTML = _SYNTAX_XHTML
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68 SYNTAX_MARKDOWN = "markdown"
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69
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70 params = """
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71 <params>
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72 <individual>
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73 <category name="%(category_name)s" label="%(category_label)s">
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74 <param name="%(name)s" label="%(label)s"
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75 value="%(default)s" type="list" security="0">
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76 %(options)s
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77 </param>
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78 </category>
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79 </individual>
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80 </params>
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81 """
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82
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83 params_data = {
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84 'category_name': CATEGORY,
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85 'category_label': _(CATEGORY), #FIXME: check that gettext can handle this
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86 'name': NAME,
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87 'label': _(NAME),
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88 'default': _SYNTAX_XHTML,
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89 'syntaxes': {},
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90 }
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91
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92 def __init__(self, host):
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93 info(_("Text syntaxes plugin initialization"))
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94 self.host = host
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95 self.syntaxes = {}
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96 self.addSyntax(self.SYNTAX_XHTML, lambda xhtml: defer.succeed(xhtml), lambda xhtml: defer.succeed(xhtml),
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97 TextSyntaxes.OPT_NO_THREAD)
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98 try:
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99 import markdown, html2text
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100 self.addSyntax(self.SYNTAX_MARKDOWN, markdown.markdown, html2text.html2text, [TextSyntaxes.OPT_DEFAULT])
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101 except ImportError:
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102 warning("markdown or html2text not found, can't use Markdown syntax")
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103 host.bridge.addMethod("syntaxConvert", ".plugin", in_sign='sssb', out_sign='s',
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104 async=True, method=self.convert)
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105
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106 def _updateParamOptions(self):
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107 data_synt = TextSyntaxes.params_data['syntaxes']
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108 syntaxes = []
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109
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110 for syntax in data_synt.keys():
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111 flags = data_synt[syntax]["flags"]
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112 if TextSyntaxes.OPT_HIDDEN not in flags:
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113 syntaxes.append(syntax)
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114
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115 syntaxes.sort(key=unicode.lower)
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116 options = []
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117
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118 for syntax in syntaxes:
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119 options.append(u'<option value="%s" />' % syntax)
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120
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121 TextSyntaxes.params_data["options"] = u'\n'.join(options)
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122 self.host.memory.updateParams(TextSyntaxes.params % TextSyntaxes.params_data)
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Goffi <goffi@goffi.org>
parents:
diff changeset
123
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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124 def getFavoriteSyntax(self, profile):
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Goffi <goffi@goffi.org>
parents:
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125 """ Return the selected syntax for the given profile
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Goffi <goffi@goffi.org>
parents:
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126
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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127 @param profile: %(doc_profile)s
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Goffi <goffi@goffi.org>
parents:
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128 @return: profile selected syntax
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Goffi <goffi@goffi.org>
parents:
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129 """
699
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Goffi <goffi@goffi.org>
parents: 695
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130 return self.host.memory.getParamA(NAME, CATEGORY , profile_key=profile)
665
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Goffi <goffi@goffi.org>
parents:
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131
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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132 def clean_xhtml(self, xhtml):
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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133 """ Clean XHTML text by removing potentially dangerous/malicious parts
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Goffi <goffi@goffi.org>
parents:
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134 @param xhtml: raw xhtml text to clean
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Goffi <goffi@goffi.org>
parents:
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135 """
674
fb0b1100c908 plugin text_syntaxes: fixed clean_xhml (it now return XHTML instead of HTML)
Goffi <goffi@goffi.org>
parents: 665
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136 def blocking_cleaning(xhtml):
692
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Goffi <goffi@goffi.org>
parents: 674
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137 """ Clean XHTML and style attributes """
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Goffi <goffi@goffi.org>
parents: 674
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138
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Goffi <goffi@goffi.org>
parents: 674
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139 def clean_style(styles_raw):
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Goffi <goffi@goffi.org>
parents: 674
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140 """" Remove styles not in the whitelist,
e98db42cd78c plugin text syntaxes: styles sanitisation
Goffi <goffi@goffi.org>
parents: 674
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141 or where the value doesn't match the regex """
e98db42cd78c plugin text syntaxes: styles sanitisation
Goffi <goffi@goffi.org>
parents: 674
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142 styles = styles_raw.split(";")
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Goffi <goffi@goffi.org>
parents: 674
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143 cleaned_styles = []
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Goffi <goffi@goffi.org>
parents: 674
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144 for style in styles:
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Goffi <goffi@goffi.org>
parents: 674
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145 try:
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Goffi <goffi@goffi.org>
parents: 674
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146 key, value = style.split(':')
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Goffi <goffi@goffi.org>
parents: 674
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147 except ValueError:
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Goffi <goffi@goffi.org>
parents: 674
diff changeset
148 continue
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Goffi <goffi@goffi.org>
parents: 674
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149 key = key.lower().strip()
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Goffi <goffi@goffi.org>
parents: 674
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150 if key not in STYLES_WHITELIST:
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Goffi <goffi@goffi.org>
parents: 674
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151 continue
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Goffi <goffi@goffi.org>
parents: 674
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152 value = value.lower().strip()
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Goffi <goffi@goffi.org>
parents: 674
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153 if not STYLES_ACCEPTED_VALUE.match(value):
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Goffi <goffi@goffi.org>
parents: 674
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154 continue
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Goffi <goffi@goffi.org>
parents: 674
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155 if value == "none":
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Goffi <goffi@goffi.org>
parents: 674
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156 continue
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Goffi <goffi@goffi.org>
parents: 674
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157 cleaned_styles.append((key, value))
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Goffi <goffi@goffi.org>
parents: 674
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158 return "; ".join(["%s: %s" % (key, value) for key, value in cleaned_styles])
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Goffi <goffi@goffi.org>
parents: 674
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159
674
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Goffi <goffi@goffi.org>
parents: 665
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160 xhtml_elt = html.fromstring(xhtml)
fb0b1100c908 plugin text_syntaxes: fixed clean_xhml (it now return XHTML instead of HTML)
Goffi <goffi@goffi.org>
parents: 665
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161 cleaner = clean.Cleaner(style=False,
fb0b1100c908 plugin text_syntaxes: fixed clean_xhml (it now return XHTML instead of HTML)
Goffi <goffi@goffi.org>
parents: 665
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162 add_nofollow=False,
692
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Goffi <goffi@goffi.org>
parents: 674
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163 safe_attrs=SAFE_ATTRS)
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Goffi <goffi@goffi.org>
parents: 674
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164 xhtml_elt = cleaner.clean_html(xhtml_elt)
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Goffi <goffi@goffi.org>
parents: 674
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165 for elt in xhtml_elt.xpath("//*[@style]"):
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Goffi <goffi@goffi.org>
parents: 674
diff changeset
166 elt.set("style", clean_style(elt.get('style')))
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Goffi <goffi@goffi.org>
parents: 674
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167 return html.tostring(xhtml_elt, method='xml')
674
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Goffi <goffi@goffi.org>
parents: 665
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168
fb0b1100c908 plugin text_syntaxes: fixed clean_xhml (it now return XHTML instead of HTML)
Goffi <goffi@goffi.org>
parents: 665
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169 d = deferToThread(blocking_cleaning, xhtml)
665
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Goffi <goffi@goffi.org>
parents:
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170 return d
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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171
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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172 def convert(self, text, syntax_from, syntax_to=_SYNTAX_XHTML, safe=True):
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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173 """ Convert a text between two syntaxes
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
174 @param text: text to convert
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
175 @param syntax_from: source syntax (e.g. "markdown")
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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176 @param syntax_to: dest syntax (e.g.: "XHTML")
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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177 @param safe: clean resulting XHTML to avoid malicious code if True
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Goffi <goffi@goffi.org>
parents:
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178 @return: converted text """
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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179
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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180 syntaxes = TextSyntaxes.params_data['syntaxes']
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Goffi <goffi@goffi.org>
parents:
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181 if syntax_from not in syntaxes:
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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182 raise UnknownSyntax(syntax_from)
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
183 if syntax_to not in syntaxes:
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
184 raise UnknownSyntax(syntax_to)
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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185 d = None
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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186
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
187 if TextSyntaxes.OPT_NO_THREAD in syntaxes[syntax_from]["flags"]:
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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188 d = syntaxes[syntax_from]["to"](text)
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Goffi <goffi@goffi.org>
parents:
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189 else:
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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190 d = deferToThread(syntaxes[syntax_from]["to"], text)
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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191
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
192 #TODO: keep only body element and change it to a div here ?
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Goffi <goffi@goffi.org>
parents:
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193
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
194 if safe:
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
195 d.addCallback(self.clean_xhtml)
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Goffi <goffi@goffi.org>
parents:
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196
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
197 if TextSyntaxes.OPT_NO_THREAD in syntaxes[syntax_to]["flags"]:
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
198 d.addCallback(syntaxes[syntax_to]["from"])
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Goffi <goffi@goffi.org>
parents:
diff changeset
199 else:
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
200 d.addCallback(lambda xhtml: deferToThread(syntaxes[syntax_to]["from"], xhtml))
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
201
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
202 return d
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
203
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
204 def addSyntax(self, name, to_xhtml_cb, from_xhtml_cb, flags = None):
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
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205 """ Add a new syntax to the manager
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
206 @param name: unique name of the syntax
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
207 @param to_xhtml_cb: callback to convert from syntax to XHTML
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
208 @param from_xhtml_cb: callback to convert from XHTML to syntax
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Goffi <goffi@goffi.org>
parents:
diff changeset
209 @param flags: set of optional flags, can be:
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
210 TextSyntaxes.OPT_DEFAULT: use as the default syntax (replace former one)
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
211 TextSyntaxes.OPT_HIDDEN: do not show in parameters
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
212 TextSyntaxes.OPT_NO_THREAD: do not defer to thread when converting (the callback must then return a deferred)
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Goffi <goffi@goffi.org>
parents:
diff changeset
213
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
214 """
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
215 name = unicode(name)
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
216 flags = flags or []
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
217 if TextSyntaxes.OPT_HIDDEN in flags and TextSyntaxes.OPT_DEFAULT in flags:
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
218 raise ValueError("%s and %s are mutually exclusive" % (TextSyntaxes.OPT_HIDDEN, TextSyntaxes.OPT_DEFAULT))
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
219
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
220 syntaxes = TextSyntaxes.params_data['syntaxes']
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
221 syntaxes[name] = {"to": to_xhtml_cb, "from": from_xhtml_cb, "flags": flags}
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
222 if TextSyntaxes.OPT_DEFAULT in flags:
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
223 syntaxes = TextSyntaxes.params_data['default'] = name
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
224
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
225 self._updateParamOptions()
6a64e0a759e6 plugin text syntaxes: this plugin manage rich text syntaxes conversions and cleaning.
Goffi <goffi@goffi.org>
parents:
diff changeset
226