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"""a mercurial extension for syntax highlighting in 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'.
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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', 'pkg_resources', '__main__',])
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from mercurial.hgweb import webcommands, webutil, common
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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="{url}highlightcss" '
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'type="text/css" />')
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def pygmentize(field, fctx, style, tmpl):
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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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# 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[:1024],
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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[:1024], 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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web_filerevision = webcommands._filerevision
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web_annotate = webcommands.annotate
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def filerevision_highlight(web, tmpl, fctx):
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style = web.config('web', 'pygments_style', 'colorful')
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pygmentize('fileline', fctx, style, tmpl)
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return web_filerevision(web, tmpl, fctx)
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def annotate_highlight(web, req, tmpl):
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fctx = webutil.filectx(web.repo, req)
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style = web.config('web', 'pygments_style', 'colorful')
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pygmentize('annotateline', fctx, style, tmpl)
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return web_annotate(web, req, tmpl)
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def generate_css(web, req, tmpl):
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pg_style = web.config('web', 'pygments_style', 'colorful')
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fmter = HtmlFormatter(style = pg_style)
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req.respond(common.HTTP_OK, 'text/css')
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return ['/* pygments_style = %s */\n\n' % pg_style, fmter.get_style_defs('')]
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# monkeypatch in the new version
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webcommands._filerevision = filerevision_highlight
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webcommands.annotate = annotate_highlight
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webcommands.highlightcss = generate_css
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webcommands.__all__.append('highlightcss')
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