# The MIT License # # Copyright (c) 2009-2011 Andreas Stuehrk # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. import curses import errno import os import pydoc import subprocess import sys import shlex from bpython._py3compat import py3 def get_pager_command(default='less -rf'): command = shlex.split(os.environ.get('PAGER', default)) return command def page_internal(data): """A more than dumb pager function.""" if hasattr(pydoc, 'ttypager'): pydoc.ttypager(data) else: sys.stdout.write(data) def page(data, use_internal=False): command = get_pager_command() if not command or use_internal: page_internal(data) else: curses.endwin() try: popen = subprocess.Popen(command, stdin=subprocess.PIPE) if py3 or isinstance(data, unicode): data = data.encode(sys.__stdout__.encoding, 'replace') popen.stdin.write(data) popen.stdin.close() except OSError as e: if e.errno == errno.ENOENT: # pager command not found, fall back to internal pager page_internal(data) return except IOError as e: if e.errno != errno.EPIPE: raise while True: try: popen.wait() except OSError as e: if e.errno != errno.EINTR: raise else: break curses.doupdate() # vim: sw=4 ts=4 sts=4 ai et