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