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# highlight extension implementation file
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#
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# The original module was split in an interface and an implementation
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# file to defer pygments loading and speedup extension setup.
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from mercurial import demandimport
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demandimport.ignore.extend(['pkgutil', 'pkg_resources', '__main__',])
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from mercurial import util
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from mercurial.templatefilters import filters
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from pygments import highlight
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from pygments.util import ClassNotFound
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from pygments.lexers import guess_lexer, guess_lexer_for_filename, TextLexer
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from pygments.formatters import HtmlFormatter
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SYNTAX_CSS = ('\n<link rel="stylesheet" href="{url}highlightcss" '
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'type="text/css" />')
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def pygmentize(field, fctx, style, tmpl):
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# append a <link ...> to the syntax highlighting css
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old_header = ''.join(tmpl('header'))
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if SYNTAX_CSS not in old_header:
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new_header = old_header + SYNTAX_CSS
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tmpl.cache['header'] = new_header
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text = fctx.data()
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if util.binary(text):
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return
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# To get multi-line strings right, we can't format line-by-line
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try:
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lexer = guess_lexer_for_filename(fctx.path(), text[:1024],
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encoding=util._encoding)
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except (ClassNotFound, ValueError):
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try:
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lexer = guess_lexer(text[:1024], encoding=util._encoding)
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except (ClassNotFound, ValueError):
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lexer = TextLexer(encoding=util._encoding)
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formatter = HtmlFormatter(style=style, encoding=util._encoding)
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colorized = highlight(text, lexer, formatter)
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# strip wrapping div
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colorized = colorized[:colorized.find('\n</pre>')]
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colorized = colorized[colorized.find('<pre>')+5:]
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coloriter = iter(colorized.splitlines())
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filters['colorize'] = lambda x: coloriter.next()
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oldl = tmpl.cache[field]
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newl = oldl.replace('line|escape', 'line|colorize')
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tmpl.cache[field] = newl
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