| # highlight.py - highlight extension implementation file |
| # |
| # Copyright 2007-2009 Adam Hupp <adam@hupp.org> 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. |
| |
| from mercurial import demandimport |
| demandimport.ignore.extend(['pkgutil', 'pkg_resources', '__main__']) |
| from mercurial import util, encoding |
| |
| 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="{url}highlightcss" ' |
| 'type="text/css" />') |
| |
| def pygmentize(field, fctx, style, tmpl): |
| |
| # append a <link ...> to the syntax highlighting css |
| old_header = tmpl.load('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 |
| |
| # Pygments is best used with Unicode strings: |
| # <http://pygments.org/docs/unicode/> |
| text = text.decode(encoding.encoding, 'replace') |
| |
| # To get multi-line strings right, we can't format line-by-line |
| try: |
| lexer = guess_lexer_for_filename(fctx.path(), text[:1024], |
| stripnl=False) |
| except (ClassNotFound, ValueError): |
| try: |
| lexer = guess_lexer(text[:1024], stripnl=False) |
| except (ClassNotFound, ValueError): |
| lexer = TextLexer(stripnl=False) |
| |
| formatter = HtmlFormatter(style=style) |
| |
| colorized = highlight(text, lexer, formatter) |
| # strip wrapping div |
| colorized = colorized[:colorized.find('\n</pre>')] |
| colorized = colorized[colorized.find('<pre>') + 5:] |
| coloriter = (s.encode(encoding.encoding, 'replace') |
| for s in colorized.splitlines()) |
| |
| tmpl.filters['colorize'] = lambda x: coloriter.next() |
| |
| oldl = tmpl.cache[field] |
| newl = oldl.replace('line|escape', 'line|colorize') |
| tmpl.cache[field] = newl |