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annotate frontends/src/tools/strings.py @ 2484:785b6a1cef0a

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author Goffi <goffi@goffi.org>
date Tue, 30 Jan 2018 08:17:08 +0100
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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 helpers methods for plugins
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5 # Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.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 import re
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21
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22 # Regexp from http://daringfireball.net/2010/07/improved_regex_for_matching_urls
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23 RE_URL = re.compile(r"""(?i)\b((?:[a-z]{3,}://|(www|ftp)\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/|mailto:|xmpp:)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?]))""")
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26 # TODO: merge this class with an other module or at least rename it (strings is not a good name)
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28
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29 def getURLParams(url):
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30 """This comes from pyjamas.Location.makeUrlDict with a small change
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31 to also parse full URLs, and parameters with no value specified
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32 (in that case the default value "" is used).
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33 @param url: any URL with or without parameters
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34 @return: a dictionary of the parameters, if any was given, or {}
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35 """
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36 dict_ = {}
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37 if "/" in url:
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38 # keep the part after the last "/"
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39 url = url[url.rindex("/") + 1:]
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40 if url.startswith("?"):
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41 # remove the first "?"
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42 url = url[1:]
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43 pairs = url.split("&")
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44 for pair in pairs:
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45 if len(pair) < 3:
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46 continue
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47 kv = pair.split("=", 1)
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48 dict_[kv[0]] = kv[1] if len(kv) > 1 else ""
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49 return dict_
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50
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52 def addURLToText(string, new_target=True):
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53 """Check a text for what looks like an URL and make it clickable.
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54
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55 @param string (unicode): text to process
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56 @param new_target (bool): if True, make the link open in a new window
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57 """
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58 # XXX: report any change to libervia.browser.strings.addURLToText
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59 def repl(match):
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60 url = match.group(0)
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61 if not re.match(r"""[a-z]{3,}://|mailto:|xmpp:""", url):
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62 url = "http://" + url
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63 target = ' target="_blank"' if new_target else ''
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64 return '<a href="%s"%s class="url">%s</a>' % (url, target, match.group(0))
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65 return RE_URL.sub(repl, string)
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68 def addURLToImage(string):
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69 """Check a XHTML text for what looks like an imageURL and make it clickable.
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70
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71 @param string (unicode): text to process
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72 """
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73 # XXX: report any change to libervia.browser.strings.addURLToImage
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74 def repl(match):
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75 url = match.group(1)
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76 return '<a href="%s" target="_blank">%s</a>' % (url, match.group(0))
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77 pattern = r"""<img[^>]* src="([^"]+)"[^>]*>"""
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78 return re.sub(pattern, repl, string)
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79
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81 def fixXHTMLLinks(xhtml):
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82 """Add http:// if the scheme is missing and force opening in a new window.
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83
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84 @param string (unicode): XHTML Content
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85 """
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86 subs = []
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87 for match in re.finditer(r'<a( \w+="[^"]*")* ?/?>', xhtml):
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88 tag = match.group(0)
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89 url = re.search(r'href="([^"]*)"', tag)
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90 if url and not url.group(1).startswith("#"): # skip internal anchor
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91 if not re.search(r'target="([^"]*)"', tag): # no target
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92 subs.append((tag, '<a target="_blank"%s' % tag[2:]))
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93 if not re.match(r"^\w+://", url.group(1)): # no scheme
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94 subs.append((url.group(0), 'href="http://%s"' % url.group(1)))
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95
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96 for url, new_url in subs:
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97 xhtml = xhtml.replace(url, new_url)
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98 return xhtml
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99