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# Widget to display a man page
import regex
from Tkinter import *
from ScrolledText import ScrolledText
# XXX These fonts may have to be changed to match your system
BOLDFONT = '*-Courier-Bold-R-Normal-*-120-*'
ITALICFONT = '*-Courier-Medium-O-Normal-*-120-*'
# XXX Recognizing footers is system dependent
# (This one works for IRIX 5.2 and Solaris 2.2)
footerprog = regex.compile(
'^ Page [1-9][0-9]*[ \t]+\|^.*Last change:.*[1-9][0-9]*\n')
emptyprog = regex.compile('^[ \t]*\n')
ulprog = regex.compile('^[ \t]*[Xv!_][Xv!_ \t]*\n')
# Basic Man Page class -- does not disable editing
class EditableManPage(ScrolledText):
def __init__(self, master=None, cnf={}):
# Initialize base class
ScrolledText.__init__(self, master, cnf)
# Define tags for formatting styles
self.tag_config('X', {'font': BOLDFONT})
self.tag_config('!', {'font': ITALICFONT})
self.tag_config('_', {'underline': 1})
def parsefile(self, fp):
if hasattr(self, 'buffer'):
raise RuntimeError, 'Still busy parsing!'
from select import select
def avail(fp=fp, tout=0.0, select=select):
return select([fp], [], [], tout)[0]
height = self.getint(self['height'])
self.startparser()
while 1:
if self.lineno < height or \
self.lineno%10 == 0 or not avail():
self.update()
nextline = fp.readline()
if not nextline:
break
self.parseline(nextline)
self.endparser()
self.update()
def startparser(self):
self.lineno = 0
self.ok = 0
self.empty = 0
self.buffer = None
def endparser(self):
if self.buffer:
self.parseline('')
del self.ok, self.empty, self.buffer
def parseline(self, nextline):
if not self.buffer:
# Save this line -- we need one line read-ahead
self.buffer = nextline
return
if emptyprog.match(self.buffer) >= 0:
# Buffered line was empty -- set a flag
self.empty = 1
self.buffer = nextline
return
textline = self.buffer
if ulprog.match(nextline) >= 0:
# Next line is properties for buffered line
propline = nextline
self.buffer = None
else:
# Next line is read-ahead
propline = None
self.buffer = nextline
if not self.ok:
# First non blank line after footer must be header
# -- skip that too
self.ok = 1
self.empty = 0
return
if footerprog.match(textline) >= 0:
# Footer -- start skipping until next non-blank line
self.ok = 0
self.empty = 0
return
if self.empty:
# One or more previous lines were empty
# -- insert one blank line in the text
self.insert_prop('\n')
self.lineno = self.lineno + 1
self.empty = 0
if not propline:
# No properties
self.insert_prop(textline)
self.lineno = self.lineno + 1
return
# Search for properties
p = ''
j = 0
for i in range(min(len(propline), len(textline))):
if propline[i] != p:
if j < i:
self.insert_prop(textline[j:i], p)
j = i
p = propline[i]
self.insert_prop(textline[j:])
self.lineno = self.lineno + 1
def insert_prop(self, str, prop = ' '):
here = self.index(AtInsert())
self.insert(AtInsert(), str[0])
tags = self.tag_names(here)
for tag in tags:
self.tag_remove(tag, here)
if prop != ' ':
self.tag_add(prop, here)
self.insert(AtInsert(), str[1:])
# Readonly Man Page class -- disables editing, otherwise the same
class ReadonlyManPage(EditableManPage):
def __init__(self, master=None, cnf={}):
# Initialize base class
EditableManPage.__init__(self, master, cnf)
# Make the text readonly
self.bind('<Any-KeyPress>', self.modify_cb)
self.bind('<Return>', self.modify_cb)
self.bind('<BackSpace>', self.modify_cb)
self.bind('<Delete>', self.modify_cb)
self.bind('<Control-h>', self.modify_cb)
self.bind('<Control-d>', self.modify_cb)
self.bind('<Control-v>', self.modify_cb)
def modify_cb(self, e):
pass
# Alias
ManPage = ReadonlyManPage
# Test program.
# usage: ManPage [manpage]; or ManPage [-f] file
# -f means that the file is nroff -man output run through ul -i
def test():
import os
import sys
# XXX This directory may be different on your system
MANDIR = '/usr/local/man/mann'
DEFAULTPAGE = 'Tcl'
formatted = 0
if sys.argv[1:] and sys.argv[1] == '-f':
formatted = 1
del sys.argv[1]
if sys.argv[1:]:
name = sys.argv[1]
else:
name = DEFAULTPAGE
if not formatted:
if name[-2:-1] != '.':
name = name + '.n'
name = os.path.join(MANDIR, name)
root = Tk()
root.minsize(1, 1)
manpage = ManPage(root, {'relief': 'sunken', 'bd': 2,
Pack: {'expand': 1, 'fill': 'both'}})
if formatted:
fp = open(name, 'r')
else:
fp = os.popen('nroff -man %s | ul -i' % name, 'r')
manpage.parsefile(fp)
root.mainloop()
# Run the test program when called as a script
if __name__ == '__main__':
test()
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