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"""
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This is Mercurial extension for syntax highlighting in the file
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revision view of hgweb.
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It depends on the pygments syntax highlighting library:
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http://pygments.org/
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To enable the extension add this to hgrc:
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[extensions]
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hgext.highlight =
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There is a single configuration option:
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[web]
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pygments_style = <style>
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The default is 'colorful'. If this is changed the corresponding CSS
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file should be re-generated by running
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# pygmentize -f html -S <newstyle>
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-- Adam Hupp <adam@hupp.org>
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"""
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from mercurial import demandimport
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demandimport.ignore.extend(['pkgutil',
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'pkg_resources',
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'__main__',])
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from mercurial.hgweb.hgweb_mod import hgweb
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from mercurial import util
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from mercurial.templatefilters import filters
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from pygments import highlight
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from pygments.util import ClassNotFound
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from pygments.lexers import guess_lexer, guess_lexer_for_filename, TextLexer
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from pygments.formatters import HtmlFormatter
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SYNTAX_CSS = ('\n<link rel="stylesheet" href="#staticurl#highlight.css" '
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'type="text/css" />')
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def pygmentize(self, tmpl, fctx, field):
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# append a <link ...> to the syntax highlighting css
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old_header = ''.join(tmpl('header'))
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if SYNTAX_CSS not in old_header:
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new_header = old_header + SYNTAX_CSS
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tmpl.cache['header'] = new_header
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text = fctx.data()
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if util.binary(text):
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return
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style = self.config("web", "pygments_style", "colorful")
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# To get multi-line strings right, we can't format line-by-line
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try:
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lexer = guess_lexer_for_filename(fctx.path(), text,
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encoding=util._encoding)
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except (ClassNotFound, ValueError):
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try:
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lexer = guess_lexer(text, encoding=util._encoding)
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except (ClassNotFound, ValueError):
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lexer = TextLexer(encoding=util._encoding)
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formatter = HtmlFormatter(style=style, encoding=util._encoding)
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colorized = highlight(text, lexer, formatter)
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# strip wrapping div
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colorized = colorized[:colorized.find('\n</pre>')]
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colorized = colorized[colorized.find('<pre>')+5:]
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coloriter = iter(colorized.splitlines())
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filters['colorize'] = lambda x: coloriter.next()
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oldl = tmpl.cache[field]
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newl = oldl.replace('line|escape', 'line|colorize')
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tmpl.cache[field] = newl
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def filerevision_highlight(self, tmpl, fctx):
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pygmentize(self, tmpl, fctx, 'fileline')
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return realrevision(self, tmpl, fctx)
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def fileannotate_highlight(self, tmpl, fctx):
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pygmentize(self, tmpl, fctx, 'annotateline')
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return realannotate(self, tmpl, fctx)
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# monkeypatch in the new version
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# should be safer than overriding the method in a derived class
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# and then patching the class
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realrevision = hgweb.filerevision
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hgweb.filerevision = filerevision_highlight
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realannotate = hgweb.fileannotate
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hgweb.fileannotate = fileannotate_highlight
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