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# Copyright (C) 2015 James E. Blair <corvus@gnu.org>
#
# 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 urwid
class ANSIParser(object):
colors = [
urwid.BLACK,
urwid.DARK_RED,
urwid.DARK_GREEN,
urwid.BROWN,
urwid.DARK_BLUE,
urwid.DARK_MAGENTA,
urwid.DARK_CYAN,
urwid.LIGHT_GRAY,
urwid.DARK_GRAY,
urwid.LIGHT_RED,
urwid.LIGHT_GREEN,
urwid.YELLOW,
urwid.LIGHT_BLUE,
urwid.LIGHT_MAGENTA,
urwid.LIGHT_CYAN,
urwid.WHITE,
]
colors256 = ['0', '6', '8', 'a', 'd', 'f']
colorsgray = ['3', '7', '11', '13', '15', '19', '23', '27', '31',
'35', '38', '42', '46', '50', '52', '58', '62', '66',
'70', '74', '78', '82', '85', '89', '93']
def __init__(self):
self.x = 0
self.y = 0
self.text_lines = []
self.attr_lines = []
self.background = urwid.AttrSpec('light gray', 'black')
self.attr = self.background
self.resetColor()
self.moveTo(0,0)
def resetColor(self):
self.bold = False
self.blink = False
self.fg = 7
self.bg = 0
def moveTo(self, x, y):
while x>80:
x-=80
y+=1
while y+1 > len(self.text_lines):
self.text_lines.append([u' ' for i in range(80)])
self.attr_lines.append([self.attr for i in range(80)])
self.x = x
self.y = y
def parseSequence(self, seq):
values = []
buf = ''
for c in seq:
if c in ['\x1b', '[']:
continue
if c == ';':
values.append(int(buf))
buf = ''
continue
if ord(c) < 64:
buf += c
if buf:
values.append(int(buf))
if c == 'm':
if not values:
values = [0]
fg256 = None
for v in values:
if fg256 is True:
if v <= 0x08:
self.fg = v
elif v <= 0x0f:
self.fg = v - 0x08
self.bold = True
elif v <= 0xe7:
r, x = divmod(v-16, 36)
g, x = divmod(x, 6)
b = x % 6
fg256 = ('#' +
self.colors256[r] +
self.colors256[g] +
self.colors256[b])
else:
fg256 = 'g' + str(self.colorsgray[v-232])
elif v == 0:
self.resetColor()
elif v == 1:
self.bold = True
elif v == 5:
self.blink = True
elif v>29 and v<38:
self.fg = v-30
elif v>39 and v<48:
self.bg = v-40
elif v==38:
fg256=True
fg = self.fg
if self.bold:
fg += 8
fgattrs = []
if self.blink:
fgattrs.append('blink')
if fg256:
fgattrs.append(fg256)
else:
fgattrs.append(self.colors[fg])
self.attr = urwid.AttrSpec(', '.join(fgattrs), self.colors[self.bg])
if c == 'A':
if not values:
values = [1]
y = max(self.y-values[0], 0)
self.moveTo(self.x, y)
if c == 'C':
if not values:
values = [1]
x = self.x + values[0]
self.moveTo(x, self.y)
if c == 'H':
self.moveTo(values[1]-1, values[0]-1)
def parse(self, data):
seq = ''
for char in data:
if seq:
seq += char
if ord(char) >= 64 and char != '[':
self.parseSequence(seq)
seq = ''
continue
if char == '\x1a':
continue
if char == '\x1b':
seq = char
continue
if char == '\r':
self.moveTo(0, self.y)
continue
if char == '\n':
self.moveTo(self.x, self.y+1)
continue
if not seq:
self.text_lines[self.y][self.x] = char
self.attr_lines[self.y][self.x] = self.attr
x = self.x + 1
self.moveTo(x, self.y)
text = []
current_attr = self.attr_lines[0][0]
current_text = u''
for y in range(len(self.text_lines)):
for x in range(80):
char = self.text_lines[y][x]
attr = self.attr_lines[y][x]
if (attr.foreground_number != current_attr.foreground_number or
attr.background_number != current_attr.background_number):
text.append((current_attr, current_text))
current_attr = attr
current_text = u''
current_text += char
if (current_attr.background_number==0):
current_text = current_text.rstrip(' ')
current_text += u'\n'
current_text = re.sub('\n+$', '\n', current_text)
text.append((current_attr, current_text))
return text
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