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https://github.com/lucaspalomodevelop/indico-plugins.git
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73 lines
2.3 KiB
Python
73 lines
2.3 KiB
Python
# This file is part of the Indico plugins.
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# Copyright (C) 2002 - 2020 CERN
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#
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# The Indico plugins are free software; you can redistribute
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# them and/or modify them under the terms of the MIT License;
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# see the LICENSE file for more details.
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import mimetypes
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from flask import render_template
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from pygments import highlight
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from pygments.formatters import HtmlFormatter
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from pygments.lexers import CppLexer, JavaLexer, PhpLexer, RubyLexer, get_lexer_for_mimetype
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from indico.core import signals
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from indico.core.plugins import IndicoPlugin
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from indico.modules.attachments.preview import Previewer
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def register_custom_mimetypes():
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mimetypes.add_type('text/x-csharp', '.cs')
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register_custom_mimetypes()
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class PygmentsPreviewer(Previewer):
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# All supported MIME types
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MIMETYPES = ('text/css', 'text/x-python', 'text/x-ruby-script', 'text/x-java-source', 'text/x-c',
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'application/javascript', 'text/x-fortran', 'text/x-csharp', 'text/php', 'text/x-php')
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# Python's mimetypes lib and Pygments do not quite agree on some MIME types
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CUSTOM_LEXERS = {
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'text/x-c': CppLexer(),
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'text/x-java-source': JavaLexer(),
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'text/x-ruby-script': RubyLexer(),
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'text/php': PhpLexer()
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}
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@classmethod
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def can_preview(cls, attachment_file):
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return attachment_file.content_type in cls.MIMETYPES
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@classmethod
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def generate_content(cls, attachment):
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mime_type = attachment.file.content_type
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lexer = cls.CUSTOM_LEXERS.get(mime_type)
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if lexer is None:
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lexer = get_lexer_for_mimetype(mime_type)
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with attachment.file.open() as f:
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html_formatter = HtmlFormatter(style='tango', linenos='inline', prestyles='mono')
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html_code = highlight(f.read(), lexer, html_formatter)
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css_code = html_formatter.get_style_defs('.highlight')
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return render_template('previewer_code:pygments_preview.html', attachment=attachment,
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html_code=html_code, css_code=css_code)
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class CodePreviewerPlugin(IndicoPlugin):
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"""Syntax highlighter (Pygments)"""
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configurable = False
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def init(self):
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super().init()
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self.connect(signals.attachments.get_file_previewers, self._get_file_previewers)
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def _get_file_previewers(self, sender, **kwargs):
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yield PygmentsPreviewer
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