112 lines
3.1 KiB
Python
112 lines
3.1 KiB
Python
"""
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Miscellaneous utilities.
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These are mostly used in templates, for presentation purposes.
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"""
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try:
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import pygments
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from pygments import highlight
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from pygments import lexers
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from pygments.formatters import HtmlFormatter
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except ImportError:
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pygments = None
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try:
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import markdown
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except ImportError:
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markdown = None
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import base64
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import mimetypes
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def shorten(s, width = 60):
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if len(s) < 60:
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return s
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return s[:57] + "..."
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def can_colorize(s):
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"""True if we can colorize the string, False otherwise."""
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if pygments is None:
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return False
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# Pygments can take a huge amount of time with long files, or with very
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# long lines; these are heuristics to try to avoid those situations.
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if len(s) > (512 * 1024):
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return False
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# If any of the first 5 lines is over 300 characters long, don't colorize.
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start = 0
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for i in range(5):
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pos = s.find('\n', start)
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if pos == -1:
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break
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if pos - start > 300:
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return False
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start = pos + 1
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return True
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def can_markdown(repo, fname):
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"""True if we can process file through markdown, False otherwise."""
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if markdown is None:
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return False
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if not repo.info.embed_markdown:
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return False
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return fname.endswith(".md")
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def can_embed_image(repo, fname):
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"""True if we can embed image file in HTML, False otherwise."""
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if not repo.info.embed_images:
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return False
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return (('.' in fname) and
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(fname.split('.')[-1].lower() in [ 'jpg', 'jpeg', 'png', 'gif' ]))
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def colorize_diff(s):
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lexer = lexers.DiffLexer(encoding = 'utf-8')
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formatter = HtmlFormatter(encoding = 'utf-8',
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cssclass = 'source_code')
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return highlight(s, lexer, formatter)
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def colorize_blob(fname, s):
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try:
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lexer = lexers.guess_lexer_for_filename(fname, s, encoding = 'utf-8')
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except lexers.ClassNotFound:
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# Only try to guess lexers if the file starts with a shebang,
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# otherwise it's likely a text file and guess_lexer() is prone to
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# make mistakes with those.
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lexer = lexers.TextLexer(encoding = 'utf-8')
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if s.startswith('#!'):
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try:
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lexer = lexers.guess_lexer(s[:80], encoding = 'utf-8')
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except lexers.ClassNotFound:
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pass
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formatter = HtmlFormatter(encoding = 'utf-8',
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cssclass = 'source_code',
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linenos = 'table',
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anchorlinenos = True,
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lineanchors = 'line')
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return highlight(s, lexer, formatter)
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def markdown_blob(s):
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return markdown.markdown(s)
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def embed_image_blob(repo, dirname, fname):
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mimetype = mimetypes.guess_type(fname)[0]
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# Unfortunately, bottle seems to require utf-8 encoded data.
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# We have to refetch the blob with raw=True, because the utf-8 encoded
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# version of the blob available in the bottle template discards binary data.
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raw_blob = repo.blob(dirname + fname, raw = True)
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return '<img style="max-width:100%;" src="data:{0};base64,{1}" />'.format( \
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mimetype, base64.b64encode(raw_blob))
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