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import regex
import regsub
import string
import sys
AS_IS = None
whitespace = '[' + string.whitespace + ']+'
class AbstractFormatter:
def __init__(self, writer):
self.writer = writer # Output device
self.font_stack = [] # Font state
self.margin_stack = [] # Margin state
self.spacing = None # Vertical spacing state
self.style_stack = [] # Other state, e.g. color
self.nospace = 1 # Should leading space be suppressed
self.softspace = 0 # Should a space be inserted
def end_paragraph(self, blankline):
if not self.nospace:
self.writer.send_paragraph(blankline)
self.nospace = 1
self.softspace = 0
def add_line_break(self):
self.writer.send_line_break()
self.nospace = 1
self.softspace = 0
def add_hor_rule(self):
self.writer.send_hor_rule()
self.nospace = 1
self.softspace = 0
def add_label_data(self, format, counter):
data = self.format_counter(format, counter)
self.writer.send_label_data(data)
def format_counter(self, format, counter):
if counter <= 0:
return format
label = ''
for c in format:
try:
if c == '1':
c = '%d' % counter
elif c in 'aA':
c = self.format_letter(c, counter)
elif c in 'iI':
c = self.format_roman(c, counter)
except:
pass
label = label + c
return label
def format_letter(self, case, counter):
label = ''
while counter > 0:
counter, x = divmod(counter-1, 26)
s = chr(ord(case) + x)
label = s + label
return label
def format_roman(self, case, counter):
ones = ['i', 'x', 'c', 'm']
fives = ['v', 'l', 'd']
label = ''
index = 0
# This will die of IndexError when counter is too big
while counter > 0:
counter, x = divmod(counter, 10)
if x == 9:
s = ones[index] + ones[index+1]
elif x == 4:
s = ones[index] + fives[index]
else:
if x >= 5:
s = fives[index]
x = x-5
else:
s = ''
s = s + ones[index]*x
label = s + label
index = index + 1
if case == 'I': label = string.upper(label)
return label
def add_flowing_data(self, data):
if not data: return
data = regsub.gsub(whitespace, ' ', data)
if self.nospace and data[0] == ' ':
data = data[1:]
if not data: return
elif self.softspace and data[0] != ' ':
data = ' ' + data
self.nospace = self.softspace = 0
if data[-1] == ' ':
data = data[:-1]
self.softspace = 1
self.writer.send_flowing_data(data)
def add_literal_data(self, data):
if self.softspace and data[:1] != '\n':
data = ' ' + data
self.nospace = self.softspace = 0
self.writer.send_literal_data(data)
def flush_softspace(self):
if self.softspace:
self.nospace = self.softspace = 0
self.writer.send_flowing_data(' ')
def push_font(self, (size, i, b, tt)):
if self.font_stack:
csize, ci, cb, ctt = self.font_stack[-1]
if size is AS_IS: size = csize
if i is AS_IS: i = ci
if b is AS_IS: b = cb
if tt is AS_IS: tt = ctt
font = (size, i, b, tt)
self.font_stack.append(font)
self.writer.new_font(font)
def pop_font(self):
if self.font_stack:
del self.font_stack[-1]
if self.font_stack:
font = self.font_stack[-1]
else:
font = None
self.writer.new_font(font)
def push_margin(self, margin):
self.margin_stack.append(margin)
self.writer.new_margin(margin, len(self.margin_stack))
def pop_margin(self):
if self.margin_stack:
del self.margin_stack[-1]
if self.margin_stack:
margin = self.margin_stack[-1]
else:
margin = None
self.writer.new_margin(margin, len(self.margin_stack))
def set_spacing(self, spacing):
self.spacing = spacing
self.writer.new_spacing(spacing)
def push_style(self, style):
self.style_stack.append(style)
self.writer.new_styles(tuple(self.style_stack))
def pop_style(self):
if self.style_stack:
del self.style_stack[-1]
self.writer.new_styles(tuple(self.style_stack))
class AbstractWriter:
def __init__(self):
pass
def new_font(self, font):
print "new_font(%s)" % `font`
def new_margin(self, margin, level):
print "new_margin(%s, %d)" % (`margin`, level)
def new_spacing(self, spacing):
print "new_spacing(%s)" % `spacing`
def new_styles(self, styles):
print "new_styles(%s)" % `styles`
def send_paragraph(self, blankline):
print "send_paragraph(%s)" % `blankline`
def send_line_break(self):
print "send_line_break()"
def send_hor_rule(self):
print "send_hor_rule()"
def send_label_data(self, data):
print "send_label_data(%s)" % `data`
def send_flowing_data(self, data):
print "send_flowing_data(%s)" % `data`
def send_literal_data(self, data):
print "send_literal_data(%s)" % `data`
class DumbWriter(AbstractWriter):
def __init__(self, file=None, maxcol=72):
self.file = file or sys.stdout
self.maxcol = maxcol
AbstractWriter.__init__(self)
self.reset()
def reset(self):
self.col = 0
self.atbreak = 0
def send_paragraph(self, blankline):
self.file.write('\n' + '\n'*blankline)
self.col = 0
self.atbreak = 0
def send_line_break(self):
self.file.write('\n')
self.col = 0
self.atbreak = 0
def send_hor_rule(self):
self.file.write('\n')
self.file.write('-'*self.maxcol)
self.file.write('\n')
self.col = 0
self.atbreak = 0
def send_literal_data(self, data):
self.file.write(data)
i = string.rfind(data, '\n')
if i >= 0:
self.col = 0
data = data[i+1:]
data = string.expandtabs(data)
self.col = self.col + len(data)
self.atbreak = 0
def send_flowing_data(self, data):
if not data: return
atbreak = self.atbreak or data[0] in string.whitespace
col = self.col
maxcol = self.maxcol
write = self.file.write
for word in string.split(data):
if atbreak:
if col + len(word) >= maxcol:
write('\n')
col = 0
else:
write(' ')
col = col + 1
write(word)
col = col + len(word)
atbreak = 1
self.col = col
self.atbreak = data[-1] in string.whitespace
def test(file = None):
w = DumbWriter()
f = AbstractFormatter(w)
if file:
fp = open(file)
elif sys.argv[1:]:
fp = open(sys.argv[1])
else:
fp = sys.stdin
while 1:
line = fp.readline()
if not line:
break
if line == '\n':
f.end_paragraph(1)
else:
f.add_flowing_data(line)
f.end_paragraph(0)
if __name__ == '__main__':
test()
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