Mercurial > hg
view hgext/highlight/highlight.py @ 29039:e3055b46ed1b stable
tags: silence hgtagsfnodes reading failures
tryread() doesn't handle "is a directory" errors and presumably
others. We might not want to globally swallow such tryread errors, so
we replace with our own try/except handling.
An upcoming test will use directories as a portable stand-in for
various bizarre circumstances that cache read/write code should be
robust to.
author | Matt Mackall <mpm@selenic.com> |
---|---|
date | Thu, 28 Apr 2016 15:40:43 -0500 |
parents | b502138f5faa |
children | ead25aa27a43 |
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# 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, guessfilenameonly=False): # 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 # str.splitlines() != unicode.splitlines() because "reasons" for c in "\x0c\x1c\x1d\x1e": if c in text: text = text.replace(c, '') # 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): # guess_lexer will return a lexer if *any* lexer matches. There is # no way to specify a minimum match score. This can give a high rate of # false positives on files with an unknown filename pattern. if guessfilenameonly: return try: lexer = guess_lexer(text[:1024], stripnl=False) except (ClassNotFound, ValueError): # Don't highlight unknown files return # Don't highlight text files if isinstance(lexer, TextLexer): return formatter = HtmlFormatter(nowrap=True, style=style) colorized = highlight(text, lexer, formatter) 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