# highlight - syntax highlighting in hgweb, based on Pygments

#

#  Copyright 2008, 2009 Patrick Mezard <pmezard@gmail.com> and others

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

#

# The original module was split in an interface and an implementation

# file to defer pygments loading and speedup extension setup.

"""syntax highlighting for hgweb (requires Pygments)

It depends on the Pygments syntax highlighting library:

http://pygments.org/

  [web]

  pygments_style = <style> (default: colorful)

  highlightfiles = <fileset> (default: size('<5M'))

"""

import highlight

from mercurial.hgweb import webcommands, webutil, common

from mercurial import extensions, encoding, fileset

# Note for extension authors: ONLY specify testedwith = 'internal' for

# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should

# be specifying the version(s) of Mercurial they are tested with, or

# leave the attribute unspecified.

testedwith = 'internal'

def pygmentize(web, field, fctx, tmpl):

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

    expr = web.config('web', 'highlightfiles', "size('<5M')")

    ctx = fctx.changectx()

    tree = fileset.parse(expr)

    mctx = fileset.matchctx(ctx, subset=[fctx.path()], status=None)

    if fctx.path() in fileset.getset(mctx, tree):

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

    mt = ''.join(tmpl('mimetype', encoding=encoding.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:

        pygmentize(web, 'fileline', fctx, tmpl)

    return orig(web, req, tmpl, fctx)

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

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

    if 'html' in mt:

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

        pygmentize(web, 'annotateline', fctx, 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('')]

def extsetup():

    # 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')