224 lines
7.5 KiB
Python
224 lines
7.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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pygments.formatters.terminal256
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Formatter for 256-color terminal output with ANSI sequences.
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RGB-to-XTERM color conversion routines adapted from xterm256-conv
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tool (http://frexx.de/xterm-256-notes/data/xterm256-conv2.tar.bz2)
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by Wolfgang Frisch.
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Formatter version 1.
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:copyright: Copyright 2006-2014 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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# TODO:
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# - Options to map style's bold/underline/italic/border attributes
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# to some ANSI attrbutes (something like 'italic=underline')
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# - An option to output "style RGB to xterm RGB/index" conversion table
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# - An option to indicate that we are running in "reverse background"
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# xterm. This means that default colors are white-on-black, not
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# black-on-while, so colors like "white background" need to be converted
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# to "white background, black foreground", etc...
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import sys
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from pygments.formatter import Formatter
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__all__ = ['Terminal256Formatter']
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class EscapeSequence:
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def __init__(self, fg=None, bg=None, bold=False, underline=False):
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self.fg = fg
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self.bg = bg
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self.bold = bold
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self.underline = underline
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def escape(self, attrs):
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if len(attrs):
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return "\x1b[" + ";".join(attrs) + "m"
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return ""
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def color_string(self):
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attrs = []
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if self.fg is not None:
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attrs.extend(("38", "5", "%i" % self.fg))
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if self.bg is not None:
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attrs.extend(("48", "5", "%i" % self.bg))
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if self.bold:
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attrs.append("01")
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if self.underline:
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attrs.append("04")
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return self.escape(attrs)
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def reset_string(self):
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attrs = []
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if self.fg is not None:
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attrs.append("39")
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if self.bg is not None:
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attrs.append("49")
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if self.bold or self.underline:
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attrs.append("00")
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return self.escape(attrs)
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class Terminal256Formatter(Formatter):
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r"""
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Format tokens with ANSI color sequences, for output in a 256-color
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terminal or console. Like in `TerminalFormatter` color sequences
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are terminated at newlines, so that paging the output works correctly.
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The formatter takes colors from a style defined by the `style` option
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and converts them to nearest ANSI 256-color escape sequences. Bold and
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underline attributes from the style are preserved (and displayed).
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.. versionadded:: 0.9
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Options accepted:
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`style`
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The style to use, can be a string or a Style subclass (default:
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``'default'``).
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"""
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name = 'Terminal256'
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aliases = ['terminal256', 'console256', '256']
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filenames = []
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def __init__(self, **options):
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Formatter.__init__(self, **options)
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self.xterm_colors = []
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self.best_match = {}
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self.style_string = {}
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self.usebold = 'nobold' not in options
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self.useunderline = 'nounderline' not in options
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self._build_color_table() # build an RGB-to-256 color conversion table
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self._setup_styles() # convert selected style's colors to term. colors
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def _build_color_table(self):
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# colors 0..15: 16 basic colors
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self.xterm_colors.append((0x00, 0x00, 0x00)) # 0
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self.xterm_colors.append((0xcd, 0x00, 0x00)) # 1
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self.xterm_colors.append((0x00, 0xcd, 0x00)) # 2
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self.xterm_colors.append((0xcd, 0xcd, 0x00)) # 3
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self.xterm_colors.append((0x00, 0x00, 0xee)) # 4
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self.xterm_colors.append((0xcd, 0x00, 0xcd)) # 5
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self.xterm_colors.append((0x00, 0xcd, 0xcd)) # 6
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self.xterm_colors.append((0xe5, 0xe5, 0xe5)) # 7
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self.xterm_colors.append((0x7f, 0x7f, 0x7f)) # 8
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self.xterm_colors.append((0xff, 0x00, 0x00)) # 9
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self.xterm_colors.append((0x00, 0xff, 0x00)) # 10
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self.xterm_colors.append((0xff, 0xff, 0x00)) # 11
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self.xterm_colors.append((0x5c, 0x5c, 0xff)) # 12
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self.xterm_colors.append((0xff, 0x00, 0xff)) # 13
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self.xterm_colors.append((0x00, 0xff, 0xff)) # 14
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self.xterm_colors.append((0xff, 0xff, 0xff)) # 15
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# colors 16..232: the 6x6x6 color cube
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valuerange = (0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff)
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for i in range(217):
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r = valuerange[(i // 36) % 6]
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g = valuerange[(i // 6) % 6]
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b = valuerange[i % 6]
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self.xterm_colors.append((r, g, b))
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# colors 233..253: grayscale
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for i in range(1, 22):
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v = 8 + i * 10
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self.xterm_colors.append((v, v, v))
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def _closest_color(self, r, g, b):
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distance = 257*257*3 # "infinity" (>distance from #000000 to #ffffff)
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match = 0
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for i in range(0, 254):
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values = self.xterm_colors[i]
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rd = r - values[0]
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gd = g - values[1]
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bd = b - values[2]
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d = rd*rd + gd*gd + bd*bd
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if d < distance:
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match = i
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distance = d
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return match
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def _color_index(self, color):
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index = self.best_match.get(color, None)
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if index is None:
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try:
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rgb = int(str(color), 16)
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except ValueError:
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rgb = 0
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r = (rgb >> 16) & 0xff
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g = (rgb >> 8) & 0xff
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b = rgb & 0xff
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index = self._closest_color(r, g, b)
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self.best_match[color] = index
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return index
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def _setup_styles(self):
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for ttype, ndef in self.style:
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escape = EscapeSequence()
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if ndef['color']:
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escape.fg = self._color_index(ndef['color'])
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if ndef['bgcolor']:
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escape.bg = self._color_index(ndef['bgcolor'])
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if self.usebold and ndef['bold']:
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escape.bold = True
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if self.useunderline and ndef['underline']:
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escape.underline = True
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self.style_string[str(ttype)] = (escape.color_string(),
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escape.reset_string())
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def format(self, tokensource, outfile):
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# hack: if the output is a terminal and has an encoding set,
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# use that to avoid unicode encode problems
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if not self.encoding and hasattr(outfile, "encoding") and \
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hasattr(outfile, "isatty") and outfile.isatty() and \
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sys.version_info < (3,):
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self.encoding = outfile.encoding
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return Formatter.format(self, tokensource, outfile)
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def format_unencoded(self, tokensource, outfile):
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for ttype, value in tokensource:
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not_found = True
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while ttype and not_found:
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try:
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# outfile.write( "<" + str(ttype) + ">" )
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on, off = self.style_string[str(ttype)]
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# Like TerminalFormatter, add "reset colors" escape sequence
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# on newline.
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spl = value.split('\n')
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for line in spl[:-1]:
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if line:
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outfile.write(on + line + off)
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outfile.write('\n')
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if spl[-1]:
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outfile.write(on + spl[-1] + off)
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not_found = False
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# outfile.write( '#' + str(ttype) + '#' )
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except KeyError:
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# ottype = ttype
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ttype = ttype[:-1]
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# outfile.write( '!' + str(ottype) + '->' + str(ttype) + '!' )
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if not_found:
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outfile.write(value)
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