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1 # -*- coding: utf-8 -*-
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2 #
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3 # Copyright (C) 2004-2006 Edgewall Software
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4 # Copyright (C) 2004 Daniel Lundin <daniel@edgewall.com>
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5 # All rights reserved.
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6 #
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7 # This software is licensed as described in the file COPYING, which
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8 # you should have received as part of this distribution. The terms
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9 # are also available at http://trac.edgewall.com/license.html.
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10 #
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11 # This software consists of voluntary contributions made by many
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12 # individuals. For the exact contribution history, see the revision
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13 # history and logs, available at http://projects.edgewall.com/trac/.
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14 #
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15 # Author: Daniel Lundin <daniel@edgewall.com>
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16
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17 """Syntax highlighting module, based on the SilverCity module.
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18
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19 Get it at: http://silvercity.sourceforge.net/
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20 """
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21
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22 import re
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23 from StringIO import StringIO
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24
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25 from trac.core import *
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26 from trac.config import ListOption
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27 from trac.mimeview.api import IHTMLPreviewRenderer, Mimeview
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28
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29 __all__ = ['SilverCityRenderer']
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30
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31 types = {
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32 'text/css': ('CSS', 3),
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33 'text/html': ('HyperText', 3, {'asp.default.language':1}),
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34 'application/xml': ('XML', 3),
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35 'application/xhtml+xml': ('HyperText', 3, {'asp.default.language':1}),
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36 'application/x-javascript': ('CPP', 3), # Kludgy.
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37 'text/x-asp': ('HyperText', 3, {'asp.default.language':2}),
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38 'text/x-c++hdr': ('CPP', 3),
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39 'text/x-c++src': ('CPP', 3),
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40 'text/x-chdr': ('CPP', 3),
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41 'text/x-csrc': ('CPP', 3),
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42 'text/x-perl': ('Perl', 3),
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43 'text/x-php': ('HyperText', 3, {'asp.default.language':4}),
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44 'application/x-httpd-php': ('HyperText', 3, {'asp.default.language':4}),
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45 'application/x-httpd-php4': ('HyperText', 3, {'asp.default.language':4}),
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46 'application/x-httpd-php3': ('HyperText', 3, {'asp.default.language':4}),
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47 'text/x-javascript': ('CPP', 3), # Kludgy.
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48 'text/x-psp': ('HyperText', 3, {'asp.default.language':3}),
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49 'text/x-python': ('Python', 3),
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50 'text/x-ruby': ('Ruby', 3),
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51 'text/x-sql': ('SQL', 3),
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52 'text/xml': ('XML', 3),
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53 'text/xslt': ('XSLT', 3),
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54 'image/svg+xml': ('XML', 3)
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55 }
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56
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57 CRLF_RE = re.compile('\r$', re.MULTILINE)
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58
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59
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60 class SilverCityRenderer(Component):
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61 """Syntax highlighting based on SilverCity."""
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62
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63 implements(IHTMLPreviewRenderer)
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64
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65 enscript_modes = ListOption('mimeviewer', 'silvercity_modes',
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66 '',
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67 """List of additional MIME types known by SilverCity.
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68 For each, a tuple `mimetype:mode:quality` has to be
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69 specified, where `mimetype` is the MIME type,
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70 `mode` is the corresponding SilverCity mode to be used
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71 for the conversion and `quality` is the quality ratio
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72 associated to this conversion.
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73 That can also be used to override the default
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74 quality ratio used by the SilverCity render, which is 3
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75 (''since 0.10'').""")
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76
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77 expand_tabs = True
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78
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79 def __init__(self):
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80 self._types = None
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81
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82 def get_quality_ratio(self, mimetype):
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83 # Extend default MIME type to mode mappings with configured ones
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84 if not self._types:
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85 self._types = {}
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86 self._types.update(types)
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87 self._types.update(
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88 Mimeview(self.env).configured_modes_mapping('silvercity'))
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89 return self._types.get(mimetype, (None, 0))[1]
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90
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91 def render(self, req, mimetype, content, filename=None, rev=None):
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92 import SilverCity
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93 try:
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94 mimetype = mimetype.split(';', 1)[0]
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95 typelang = self._types[mimetype]
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96 lang = typelang[0]
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97 module = getattr(SilverCity, lang)
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98 generator = getattr(module, lang + "HTMLGenerator")
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99 try:
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100 allprops = typelang[2]
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101 propset = SilverCity.PropertySet()
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102 for p in allprops.keys():
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103 propset[p] = allprops[p]
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104 except IndexError:
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105 pass
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106 except (KeyError, AttributeError):
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107 err = "No SilverCity lexer found for mime-type '%s'." % mimetype
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108 raise Exception, err
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109
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110 # SilverCity does not like unicode strings
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111 content = content.encode('utf-8')
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112
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113 # SilverCity generates extra empty line against some types of
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114 # the line such as comment or #include with CRLF. So we
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115 # standardize to LF end-of-line style before call.
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116 content = CRLF_RE.sub('', content)
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117
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118 buf = StringIO()
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119 generator().generate_html(buf, content)
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120
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121 br_re = re.compile(r'<br\s*/?>$', re.MULTILINE)
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122 span_default_re = re.compile(r'<span class="\w+_default">(.*?)</span>',
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123 re.DOTALL)
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124 html = span_default_re.sub(r'\1', br_re.sub('', buf.getvalue()))
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125
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126 # Convert the output back to a unicode string
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127 html = html.decode('utf-8')
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128
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129 # SilverCity generates _way_ too many non-breaking spaces...
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130 # We don't need them anyway, so replace them by normal spaces
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131 return html.replace(' ', ' ').splitlines()
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