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1 # copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved. |
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2 # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr |
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3 # |
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4 # This file is part of CubicWeb. |
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5 # |
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6 # CubicWeb is free software: you can redistribute it and/or modify it under the |
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7 # terms of the GNU Lesser General Public License as published by the Free |
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8 # Software Foundation, either version 2.1 of the License, or (at your option) |
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9 # any later version. |
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10 # |
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11 # CubicWeb is distributed in the hope that it will be useful, but WITHOUT |
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12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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13 # FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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14 # details. |
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15 # |
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16 # You should have received a copy of the GNU Lesser General Public License along |
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17 # with CubicWeb. If not, see <http://www.gnu.org/licenses/>. |
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18 """mime type transformation engine for cubicweb, based on mtconverter""" |
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19 |
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20 __docformat__ = "restructuredtext en" |
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21 |
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22 from logilab import mtconverter |
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23 |
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24 from logilab.mtconverter.engine import TransformEngine |
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25 from logilab.mtconverter.transform import Transform |
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26 from logilab.mtconverter import (register_base_transforms, |
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27 register_pil_transforms, |
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28 register_pygments_transforms) |
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29 |
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30 from cubicweb.utils import UStringIO |
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31 from cubicweb.uilib import rest_publish, markdown_publish, html_publish |
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32 |
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33 HTML_MIMETYPES = ('text/html', 'text/xhtml', 'application/xhtml+xml') |
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34 |
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35 # CubicWeb specific transformations |
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36 |
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37 class rest_to_html(Transform): |
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38 inputs = ('text/rest', 'text/x-rst') |
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39 output = 'text/html' |
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40 def _convert(self, trdata): |
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41 return rest_publish(trdata.appobject, trdata.decode()) |
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42 |
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43 class markdown_to_html(Transform): |
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44 inputs = ('text/markdown', 'text/x-markdown') |
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45 output = 'text/html' |
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46 def _convert(self, trdata): |
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47 return markdown_publish(trdata.appobject, trdata.decode()) |
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48 |
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49 class html_to_html(Transform): |
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50 inputs = HTML_MIMETYPES |
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51 output = 'text/html' |
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52 def _convert(self, trdata): |
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53 return html_publish(trdata.appobject, trdata.data) |
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54 |
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55 |
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56 # Instantiate and configure the transformation engine |
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57 |
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58 mtconverter.UNICODE_POLICY = 'replace' |
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59 |
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60 ENGINE = TransformEngine() |
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61 ENGINE.add_transform(rest_to_html()) |
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62 ENGINE.add_transform(markdown_to_html()) |
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63 ENGINE.add_transform(html_to_html()) |
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64 |
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65 try: |
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66 from cubicweb.ext.tal import CubicWebContext, compile_template |
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67 except ImportError: |
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68 HAS_TAL = False |
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69 from cubicweb import schema |
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70 schema.NEED_PERM_FORMATS.remove('text/cubicweb-page-template') |
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71 |
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72 else: |
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73 HAS_TAL = True |
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74 |
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75 class ept_to_html(Transform): |
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76 inputs = ('text/cubicweb-page-template',) |
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77 output = 'text/html' |
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78 output_encoding = 'utf-8' |
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79 def _convert(self, trdata): |
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80 context = CubicWebContext() |
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81 appobject = trdata.appobject |
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82 context.update({'self': appobject, 'rset': appobject.cw_rset, |
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83 'req': appobject._cw, |
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84 '_' : appobject._cw._, |
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85 'user': appobject._cw.user}) |
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86 output = UStringIO() |
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87 template = compile_template(trdata.encode(self.output_encoding)) |
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88 template.expand(context, output) |
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89 return output.getvalue() |
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90 |
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91 ENGINE.add_transform(ept_to_html()) |
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92 |
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93 if register_pil_transforms(ENGINE, verb=False): |
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94 HAS_PIL_TRANSFORMS = True |
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95 else: |
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96 HAS_PIL_TRANSFORMS = False |
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97 |
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98 try: |
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99 from logilab.mtconverter.transforms import pygmentstransforms |
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100 for mt in ('text/plain',) + HTML_MIMETYPES: |
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101 try: |
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102 pygmentstransforms.mimetypes.remove(mt) |
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103 except ValueError: |
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104 continue |
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105 register_pygments_transforms(ENGINE, verb=False) |
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106 |
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107 def patch_convert(cls): |
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108 def _convert(self, trdata, origconvert=cls._convert): |
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109 add_css = getattr(trdata.appobject._cw, 'add_css', None) |
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110 if add_css is not None: |
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111 # session has no add_css, only http request |
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112 add_css('pygments.css') |
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113 return origconvert(self, trdata) |
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114 cls._convert = _convert |
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115 patch_convert(pygmentstransforms.PygmentsHTMLTransform) |
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116 |
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117 HAS_PYGMENTS_TRANSFORMS = True |
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118 except ImportError: |
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119 HAS_PYGMENTS_TRANSFORMS = False |
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120 |
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121 register_base_transforms(ENGINE, verb=False) |