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converter.py
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converter.py
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# This file is part of ansi2html
# Convert ANSI (terminal) colours and attributes to HTML
# Copyright (C) 2012 Ralph Bean <rbean@redhat.com>
# Copyright (C) 2013 Sebastian Pipping <sebastian@pipping.org>
#
# Inspired by and developed off of the work by pixelbeat and blackjack.
#
# This program is free software: you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 3 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see
# <http://www.gnu.org/licenses/>.
import re
import sys
import optparse
import pkg_resources
try:
from collections import OrderedDict
except ImportError:
from ordereddict import OrderedDict
from ansi2html.style import get_styles
import six
from six.moves import map
from six.moves import zip
ANSI_FULL_RESET = 0
ANSI_INTENSITY_INCREASED = 1
ANSI_INTENSITY_REDUCED = 2
ANSI_INTENSITY_NORMAL = 22
ANSI_STYLE_ITALIC = 3
ANSI_STYLE_NORMAL = 23
ANSI_BLINK_SLOW = 5
ANSI_BLINK_FAST = 6
ANSI_BLINK_OFF = 25
ANSI_UNDERLINE_ON = 4
ANSI_UNDERLINE_OFF = 24
ANSI_CROSSED_OUT_ON = 9
ANSI_CROSSED_OUT_OFF = 29
ANSI_VISIBILITY_ON = 28
ANSI_VISIBILITY_OFF = 8
ANSI_FOREGROUND_CUSTOM_MIN = 30
ANSI_FOREGROUND_CUSTOM_MAX = 37
ANSI_FOREGROUND_256 = 38
ANSI_FOREGROUND_DEFAULT = 39
ANSI_BACKGROUND_CUSTOM_MIN = 40
ANSI_BACKGROUND_CUSTOM_MAX = 47
ANSI_BACKGROUND_256 = 48
ANSI_BACKGROUND_DEFAULT = 49
ANSI_NEGATIVE_ON = 7
ANSI_NEGATIVE_OFF = 27
_template = six.u("""<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=%(output_encoding)s">
<style type="text/css">\n%(style)s\n</style>
</head>
<body class="body_foreground body_background" style="font-size: %(font_size)s;" >
<pre>
%(content)s
</pre>
</body>
</html>
""")
class _State(object):
def __init__(self):
self.reset()
def reset(self):
self.intensity = ANSI_INTENSITY_NORMAL
self.style = ANSI_STYLE_NORMAL
self.blink = ANSI_BLINK_OFF
self.underline = ANSI_UNDERLINE_OFF
self.crossedout = ANSI_CROSSED_OUT_OFF
self.visibility = ANSI_VISIBILITY_ON
self.foreground = (ANSI_FOREGROUND_DEFAULT, None)
self.background = (ANSI_BACKGROUND_DEFAULT, None)
self.negative = ANSI_NEGATIVE_OFF
def adjust(self, ansi_code, parameter=None):
if ansi_code in (ANSI_INTENSITY_INCREASED, ANSI_INTENSITY_REDUCED, ANSI_INTENSITY_NORMAL):
self.intensity = ansi_code
elif ansi_code in (ANSI_STYLE_ITALIC, ANSI_STYLE_NORMAL):
self.style = ansi_code
elif ansi_code in (ANSI_BLINK_SLOW, ANSI_BLINK_FAST, ANSI_BLINK_OFF):
self.blink = ansi_code
elif ansi_code in (ANSI_UNDERLINE_ON, ANSI_UNDERLINE_OFF):
self.underline = ansi_code
elif ansi_code in (ANSI_CROSSED_OUT_ON, ANSI_CROSSED_OUT_OFF):
self.crossedout = ansi_code
elif ansi_code in (ANSI_VISIBILITY_ON, ANSI_VISIBILITY_OFF):
self.visibility = ansi_code
elif ANSI_FOREGROUND_CUSTOM_MIN <= ansi_code <= ANSI_FOREGROUND_CUSTOM_MAX:
self.foreground = (ansi_code, None)
elif ansi_code == ANSI_FOREGROUND_256:
self.foreground = (ansi_code, parameter)
elif ansi_code == ANSI_FOREGROUND_DEFAULT:
self.foreground = (ansi_code, None)
elif ANSI_BACKGROUND_CUSTOM_MIN <= ansi_code <= ANSI_BACKGROUND_CUSTOM_MAX:
self.background = (ansi_code, None)
elif ansi_code == ANSI_BACKGROUND_256:
self.background = (ansi_code, parameter)
elif ansi_code == ANSI_BACKGROUND_DEFAULT:
self.background = (ansi_code, None)
elif ansi_code in (ANSI_NEGATIVE_ON, ANSI_NEGATIVE_OFF):
self.negative = ansi_code
def to_css_classes(self):
css_classes = []
def append_unless_default(output, value, default):
if value != default:
css_class = 'ansi%d' % value
output.append(css_class)
def append_color_unless_default(output, color, default, negative, neg_css_class):
value, parameter = color
if value != default:
prefix = 'inv' if negative else 'ansi'
css_class_index = str(value) \
if (parameter is None) \
else '%d-%d' % (value, parameter)
output.append(prefix + css_class_index)
elif negative:
output.append(neg_css_class)
append_unless_default(css_classes, self.intensity, ANSI_INTENSITY_NORMAL)
append_unless_default(css_classes, self.style, ANSI_STYLE_NORMAL)
append_unless_default(css_classes, self.blink, ANSI_BLINK_OFF)
append_unless_default(css_classes, self.underline, ANSI_UNDERLINE_OFF)
append_unless_default(css_classes, self.crossedout, ANSI_CROSSED_OUT_OFF)
append_unless_default(css_classes, self.visibility, ANSI_VISIBILITY_ON)
flip_fore_and_background = (self.negative == ANSI_NEGATIVE_ON)
append_color_unless_default(css_classes, self.foreground, ANSI_FOREGROUND_DEFAULT, flip_fore_and_background, 'inv_background')
append_color_unless_default(css_classes, self.background, ANSI_BACKGROUND_DEFAULT, flip_fore_and_background, 'inv_foreground')
return css_classes
def linkify(line):
for match in re.findall(r'https?:\/\/\S+', line):
line = line.replace(match, '<a href="%s">%s</a>' % (match, match))
return line
def _needs_extra_newline(text):
if not text or text.endswith('\n'):
return False
return True
class CursorMoveUp(object):
pass
class Ansi2HTMLConverter(object):
""" Convert Ansi color codes to CSS+HTML
Example:
>>> conv = Ansi2HTMLConverter()
>>> ansi = " ".join(sys.stdin.readlines())
>>> html = conv.convert(ansi)
"""
def __init__(self,
inline=False,
dark_bg=True,
font_size='normal',
linkify=False,
escaped=True,
markup_lines=False,
output_encoding='utf-8',
scheme='ansi2html'
):
self.inline = inline
self.dark_bg = dark_bg
self.font_size = font_size
self.linkify = linkify
self.escaped = escaped
self.markup_lines = markup_lines
self.output_encoding = output_encoding
self.scheme = scheme
self._attrs = None
if inline:
self.styles = dict([(item.klass.strip('.'), item) for item in get_styles(self.dark_bg, self.scheme)])
self.ansi_codes_prog = re.compile('\033\\[' '([\\d;]*)' '([a-zA-z])')
def apply_regex(self, ansi):
parts = self._apply_regex(ansi)
parts = self._collapse_cursor(parts)
parts = list(parts)
if self.linkify:
parts = [linkify(part) for part in parts]
combined = "".join(parts)
if self.markup_lines:
combined = "\n".join([
"""<span id="line-%i">%s</span>""" % (i, line)
for i, line in enumerate(combined.split('\n'))
])
return combined
def _apply_regex(self, ansi):
if self.escaped:
specials = OrderedDict([
('&', '&'),
('<', '<'),
('>', '>'),
])
for pattern, special in specials.items():
ansi = ansi.replace(pattern, special)
state = _State()
inside_span = False
last_end = 0 # the index of the last end of a code we've seen
for match in self.ansi_codes_prog.finditer(ansi):
yield ansi[last_end:match.start()]
last_end = match.end()
params, command = match.groups()
if command not in 'mMA':
continue
# Special cursor-moving code. The only supported one.
if command == 'A':
yield CursorMoveUp
continue
try:
params = list(map(int, params.split(';')))
except ValueError:
params = [ANSI_FULL_RESET]
# Find latest reset marker
last_null_index = None
skip_after_index = -1
for i, v in enumerate(params):
if i <= skip_after_index:
continue
if v == ANSI_FULL_RESET:
last_null_index = i
elif v in (ANSI_FOREGROUND_256, ANSI_BACKGROUND_256):
skip_after_index = i + 2
# Process reset marker, drop everything before
if last_null_index is not None:
params = params[last_null_index + 1:]
if inside_span:
inside_span = False
yield '</span>'
state.reset()
if not params:
continue
# Turn codes into CSS classes
skip_after_index = -1
for i, v in enumerate(params):
if i <= skip_after_index:
continue
if v in (ANSI_FOREGROUND_256, ANSI_BACKGROUND_256):
try:
parameter = params[i + 2]
except IndexError:
continue
skip_after_index = i + 2
else:
parameter = None
state.adjust(v, parameter=parameter)
if inside_span:
yield '</span>'
inside_span = False
css_classes = state.to_css_classes()
if not css_classes:
continue
if self.inline:
style = [self.styles[klass].kw for klass in css_classes if
klass in self.styles]
yield '<span style="%s">' % "; ".join(style)
else:
yield '<span class="%s">' % " ".join(css_classes)
inside_span = True
yield ansi[last_end:]
if inside_span:
yield '</span>'
inside_span = False
def _collapse_cursor(self, parts):
""" Act on any CursorMoveUp commands by deleting preceding tokens """
final_parts = []
for part in parts:
# Throw out empty string tokens ("")
if not part:
continue
# Go back, deleting every token in the last 'line'
if part == CursorMoveUp:
final_parts.pop()
while '\n' not in final_parts[-1]:
final_parts.pop()
continue
# Otherwise, just pass this token forward
final_parts.append(part)
return final_parts
def prepare(self, ansi='', ensure_trailing_newline=False):
""" Load the contents of 'ansi' into this object """
body = self.apply_regex(ansi)
if ensure_trailing_newline and _needs_extra_newline(body):
body += '\n'
self._attrs = {
'dark_bg': self.dark_bg,
'font_size': self.font_size,
'body': body,
}
return self._attrs
def attrs(self):
""" Prepare attributes for the template """
if not self._attrs:
raise Exception("Method .prepare not yet called.")
return self._attrs
def convert(self, ansi, full=True, ensure_trailing_newline=False):
attrs = self.prepare(ansi, ensure_trailing_newline=ensure_trailing_newline)
if not full:
return attrs["body"]
else:
return _template % {
'style' : "\n".join(map(str, get_styles(self.dark_bg, self.scheme))),
'font_size' : self.font_size,
'content' : attrs["body"],
'output_encoding' : self.output_encoding,
}
def produce_headers(self):
return '<style type="text/css">\n%(style)s\n</style>\n' % {
'style' : "\n".join(map(str, get_styles(self.dark_bg, self.scheme)))
}
def main():
"""
$ ls --color=always | ansi2html > directories.html
$ sudo tail /var/log/messages | ccze -A | ansi2html > logs.html
$ task burndown | ansi2html > burndown.html
"""
version_str = pkg_resources.get_distribution('ansi2html').version
parser = optparse.OptionParser(
usage=main.__doc__,
version="%%prog %s" % version_str)
parser.add_option(
"-p", "--partial", dest="partial",
default=False, action="store_true",
help="Process lines as them come in. No headers are produced.")
parser.add_option(
"-i", "--inline", dest="inline",
default=False, action="store_true",
help="Inline style without headers or template.")
parser.add_option(
"-H", "--headers", dest="headers",
default=False, action="store_true",
help="Just produce the <style> tag.")
parser.add_option(
"-f", '--font-size', dest='font_size', metavar='SIZE',
default="normal",
help="Set the global font size in the output.")
parser.add_option(
"-l", '--light-background', dest='light_background',
default=False, action="store_true",
help="Set output to 'light background' mode.")
parser.add_option(
"-a", '--linkify', dest='linkify',
default=False, action="store_true",
help="Transform URLs into <a> links.")
parser.add_option(
"-u", '--unescape', dest='escaped',
default=True, action="store_false",
help="Do not escape XML tags found in the input.")
parser.add_option(
"-m", '--markup-lines', dest="markup_lines",
default=False, action="store_true",
help="Surround lines with <span id='line-n'>..</span>.")
parser.add_option(
'--input-encoding', dest='input_encoding', metavar='ENCODING',
default='utf-8',
help="Specify input encoding")
parser.add_option(
'--output-encoding', dest='output_encoding', metavar='ENCODING',
default='utf-8',
help="Specify output encoding")
parser.add_option(
'-s', '--scheme', dest='scheme', metavar='SCHEME',
default='ansi2html',
help="Specify color palette scheme [ansi2html, xterm, xterm-bright]")
opts, args = parser.parse_args()
conv = Ansi2HTMLConverter(
inline=opts.inline,
dark_bg=not opts.light_background,
font_size=opts.font_size,
linkify=opts.linkify,
escaped=opts.escaped,
markup_lines=opts.markup_lines,
output_encoding=opts.output_encoding,
scheme=opts.scheme,
)
def _read(input_bytes):
if six.PY3:
# This is actually already unicode. How to we explicitly decode in
# python3? I don't know the answer yet.
return input_bytes
else:
return input_bytes.decode(opts.input_encoding)
def _print(output_unicode, end='\n'):
if hasattr(sys.stdout, 'buffer'):
output_bytes = (output_unicode + end).encode(opts.output_encoding)
sys.stdout.buffer.write(output_bytes)
elif not six.PY3:
sys.stdout.write((output_unicode + end).encode(opts.output_encoding))
else:
sys.stdout.write(output_unicode + end)
# Produce only the headers and quit
if opts.headers:
_print(conv.produce_headers(), end='')
return
full = not bool(opts.partial or opts.inline)
if six.PY3:
output = conv.convert("".join(sys.stdin.readlines()), full=full, ensure_trailing_newline=True)
_print(output, end='')
else:
output = conv.convert(six.u("").join(
map(_read, sys.stdin.readlines())
), full=full, ensure_trailing_newline=True)
_print(output, end='')