"""syntax highlighting in hgweb, based on Pygments

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'.

-- Adam Hupp <adam@hupp.org>

"""

import highlight

from mercurial.hgweb import webcommands, webutil, common

from mercurial import extensions

def filerevision_highlight(orig, web, tmpl, fctx):

    mt = ''.join(tmpl('mimetype', encoding=web.encoding))

    # only pygmentize for mimetype containing 'html' so we both match

    # 'text/html' and possibly 'application/xhtml+xml' in the future

    # so that we don't have to touch the extension when the mimetype

    # for a template changes; also hgweb optimizes the case that a

    # raw file is sent using rawfile() and doesn't call us, so we

    # can't clash with the file's content-type here in case we

    # pygmentize a html file

    if 'html' in mt:

        style = web.config('web', 'pygments_style', 'colorful')

        highlight.pygmentize('fileline', fctx, style, tmpl)

    return orig(web, tmpl, fctx)

def annotate_highlight(orig, web, req, tmpl):

    mt = ''.join(tmpl('mimetype', encoding=web.encoding))

    if 'html' in mt:

        fctx = webutil.filectx(web.repo, req)

        style = web.config('web', 'pygments_style', 'colorful')

        highlight.pygmentize('annotateline', fctx, style, tmpl)

    return orig(web, req, tmpl)

def generate_css(web, req, tmpl):

    pg_style = web.config('web', 'pygments_style', 'colorful')

    fmter = highlight.HtmlFormatter(style = pg_style)

    req.respond(common.HTTP_OK, 'text/css')

    return ['/* pygments_style = %s */\n\n' % pg_style, fmter.get_style_defs('')]

# monkeypatch in the new version

extensions.wrapfunction(webcommands, '_filerevision', filerevision_highlight)

extensions.wrapfunction(webcommands, 'annotate', annotate_highlight)

webcommands.highlightcss = generate_css

webcommands.__all__.append('highlightcss')