#
# pyconsole.py
#
# Copyright (C) 2004-2005 by Yevgen Muntyan <muntyan@math.tamu.edu>
#
# 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 2 of the License, or
# (at your option) any later version.
#
# See COPYING file that comes with this distribution.
#
# This module 'runs' python interpreter in a TextView widget.
# The main class is Console, usage is:
# Console(locals=None, banner=None, completer=None, use_rlcompleter=True, start_script='') -
# it creates the widget and 'starts' interactive session; see the end of
# this file. If start_script is not empty, it pastes it as it was entered from keyboard.
#
# This widget is not a replacement for real terminal with python running
# inside: GtkTextView is not a terminal.
# The use case is: you have a python program, you create this widget,
# and inspect your program interiors.
import gtk
import gtk.gdk as gdk
import gobject
import pango
import gtk.keysyms as keys
import code
import sys
import keyword
import re
# commonprefix() from posixpath
def commonprefix(m):
"Given a list of pathnames, returns the longest common leading component"
if not m: return ''
prefix = m[0]
for item in m:
for i in range(len(prefix)):
if prefix[:i+1] != item[:i+1]:
prefix = prefix[:i]
if i == 0:
return ''
break
return prefix
class _ReadLine(object):
class History(object):
def __init__(self):
object.__init__(self)
self.items = ['']
self.ptr = 0
self.edited = {}
def commit(self, text):
if text and self.items[-1] != text:
self.items.append(text)
self.ptr = 0
self.edited = {}
def get(self, dir, text):
if len(self.items) == 1:
return None
if text != self.items[self.ptr]:
self.edited[self.ptr] = text
elif self.edited.has_key(self.ptr):
del self.edited[self.ptr]
self.ptr = self.ptr + dir
if self.ptr >= len(self.items):
self.ptr = 0
elif self.ptr < 0:
self.ptr = len(self.items) - 1
try:
return self.edited[self.ptr]
except KeyError:
return self.items[self.ptr]
def __init__(self):
object.__init__(self)
self.set_wrap_mode(gtk.WRAP_CHAR)
self.modify_font(pango.FontDescription("Monospace"))
self.buffer = self.get_buffer()
self.buffer.connect("insert-text", self.on_buf_insert)
self.buffer.connect("delete-range", self.on_buf_delete)
self.buffer.connect("mark-set", self.on_buf_mark_set)
self.do_insert = False
self.do_delete = False
self.cursor = self.buffer.create_mark("cursor",
self.buffer.get_start_iter(),
False)
insert = self.buffer.get_insert()
self.cursor.set_visible(True)
insert.set_visible(False)
self.ps = ''
self.in_raw_input = False
self.run_on_raw_input = None
self.tab_pressed = 0
self.history = _ReadLine.History()
self.nonword_re = re.compile("[^\w\._]")
def freeze_undo(self):
try: self.begin_not_undoable_action()
except: pass
def thaw_undo(self):
try: self.end_not_undoable_action()
except: pass
def raw_input(self, ps=None):
if ps:
self.ps = ps
else:
self.ps = ''
iter = self.buffer.get_iter_at_mark(self.buffer.get_insert())
if ps:
self.freeze_undo()
self.buffer.insert(iter, self.ps)
self.thaw_undo()
self.__move_cursor_to(iter)
self.scroll_to_mark(self.cursor, 0.2)
self.in_raw_input = True
if self.run_on_raw_input:
run_now = self.run_on_raw_input
self.run_on_raw_input = None
self.buffer.insert_at_cursor(run_now + '\n')
def on_buf_mark_set(self, buffer, iter, mark):
if not mark is buffer.get_insert():
return
start = self.__get_start()
end = self.__get_end()
if iter.compare(self.__get_start()) >= 0 and \
iter.compare(self.__get_end()) <= 0:
buffer.move_mark_by_name("cursor", iter)
self.scroll_to_mark(self.cursor, 0.2)
def __insert(self, iter, text):
self.do_insert = True
self.buffer.insert(iter, text)
self.do_insert = False
def on_buf_insert(self, buf, iter, text, len):
if not self.in_raw_input or self.do_insert or not len:
return
buf.stop_emission("insert-text")
lines = text.splitlines()
need_eol = False
for l in lines:
if need_eol:
self.__commit()
iter = self.__get_cursor()
else:
cursor = self.__get_cursor()
if iter.compare(self.__get_start()) < 0:
iter = cursor
elif iter.compare(self.__get_end()) > 0:
iter = cursor
else:
self.__move_cursor_to(iter)
need_eol = True
self.__insert(iter, l)
self.__move_cursor(0)
def __delete(self, start, end):
self.do_delete = True
self.buffer.delete(start, end)
self.do_delete = False
def on_buf_delete(self, buf, start, end):
if not self.in_raw_input or self.do_delete:
return
buf.stop_emission("delete-range")
start.order(end)
line_start = self.__get_start()
line_end = self.__get_end()
if start.compare(line_end) > 0:
return
if end.compare(line_start) < 0:
return
self.__move_cursor(0)
if start.compare(line_start) < 0:
start = line_start
if end.compare(line_end) > 0:
end = line_end
self.__delete(start, end)
def do_key_press_event(self, event, parent_type):
if not self.in_raw_input:
return parent_type.do_key_press_event(self, event)
tab_pressed = self.tab_pressed
self.tab_pressed = 0
handled = True
state = event.state & (gdk.SHIFT_MASK |
gdk.CONTROL_MASK |
gdk.MOD1_MASK)
keyval = event.keyval
if not state:
if keyval == keys.Return:
self.__commit()
elif keyval == keys.Up:
self.__history(-1)
elif keyval == keys.Down:
self.__history(1)
elif keyval == keys.Left:
self.__move_cursor(-1)
elif keyval == keys.Right:
self.__move_cursor(1)
elif keyval == keys.Home:
self.__move_cursor(-10000)
elif keyval == keys.End:
self.__move_cursor(10000)
elif keyval == keys.Tab:
self.tab_pressed = tab_pressed + 1
self.__complete()
else:
handled = False
elif state == gdk.CONTROL_MASK:
if keyval == keys.u:
start = self.__get_start()
end = self.__get_cursor()
self.__delete(start, end)
else:
handled = False
else:
handled = False
if not handled:
return parent_type.do_key_press_event(self, event)
else:
return True
def __history(self, dir):
text = self.__get_line()
new_text = self.history.get(dir, text)
if not new_text is None:
self.__replace_line(new_text)
self.__move_cursor(0)
self.scroll_to_mark(self.cursor, 0.2)
def __get_cursor(self):
return self.buffer.get_iter_at_mark(self.cursor)
def __get_start(self):
iter = self.__get_cursor()
iter.set_line_offset(len(self.ps))
return iter
def __get_end(self):
iter = self.__get_cursor()
if not iter.ends_line():
iter.forward_to_line_end()
return iter
def __get_text(self, start, end):
return self.buffer.get_text(start, end, False)
def __move_cursor_to(self, iter):
self.buffer.place_cursor(iter)
self.buffer.move_mark_by_name("cursor", iter)
def __move_cursor(self, howmany):
iter = self.__get_cursor()
end = self.__get_cursor()
if not end.ends_line():
end.forward_to_line_end()
line_len = end.get_line_offset()
move_to = iter.get_line_offset() + howmany
move_to = min(max(move_to, len(self.ps)), line_len)
iter.set_line_offset(move_to)
self.__move_cursor_to(iter)
def __delete_at_cursor(self, howmany):
iter = self.__get_cursor()
end = self.__get_cursor()
if not end.ends_line():
end.forward_to_line_end()
line_len = end.get_line_offset()
erase_to = iter.get_line_offset() + howmany
if erase_to > line_len:
erase_to = line_len
elif erase_to < len(self.ps):
erase_to = len(self.ps)
end.set_line_offset(erase_to)
self.__delete(iter, end)
def __get_width(self):
if not (self.flags() & gtk.REALIZED):
return 80
layout = pango.Layout(self.get_pango_context())
letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
layout.set_text(letters)
pix_width = layout.get_pixel_size()[0]
return self.allocation.width * len(letters) / pix_width
def __print_completions(self, completions):
line_start = self.__get_text(self.__get_start(), self.__get_cursor())
line_end = self.__get_text(self.__get_cursor(), self.__get_end())
iter = self.buffer.get_end_iter()
self.__move_cursor_to(iter)
self.__insert(iter, "\n")
width = max(self.__get_width(), 4)
max_width = max([len(s) for s in completions])
n_columns = max(int(width / (max_width + 1)), 1)
col_width = int(width / n_columns)
total = len(completions)
col_length = total / n_columns
if total % n_columns:
col_length = col_length + 1
col_length = max(col_length, 1)
if col_length == 1:
n_columns = total
col_width = width / total
for i in range(col_length):
for j in range(n_columns):
ind = i + j*col_length
if ind < total:
if j == n_columns - 1:
n_spaces = 0
else:
n_spaces = col_width - len(completions[ind])
self.__insert(iter, completions[ind] + " " * n_spaces)
self.__insert(iter, "\n")
self.__insert(iter, "%s%s%s" % (self.ps, line_start, line_end))
iter.set_line_offset(len(self.ps) + len(line_start))
self.__move_cursor_to(iter)
self.scroll_to_mark(self.cursor, 0.2)
def __complete(self):
text = self.__get_text(self.__get_start(), self.__get_cursor())
start = ''
word = text
nonwords = self.nonword_re.findall(text)
if nonwords:
last = text.rfind(nonwords[-1]) + len(nonwords[-1])
start = text[:last]
word = text[last:]
completions = self.complete(word)
if completions:
prefix = commonprefix(completions)
if prefix != word:
start_iter = self.__get_start()
start_iter.forward_chars(len(start))
end_iter = start_iter.copy()
end_iter.forward_chars(len(word))
self.__delete(start_iter, end_iter)
self.__insert(end_iter, prefix)
elif self.tab_pressed > 1:
self.freeze_undo()
self.__print_completions(completions)
self.thaw_undo()
self.tab_pressed = 0
def complete(self, text):
return None
def __get_line(self):
start = self.__get_start()
end = self.__get_end()
return self.buffer.get_text(start, end, False)
def __replace_line(self, new_text):
start = self.__get_start()
end = self.__get_end()
self.__delete(start, end)
self.__insert(end, new_text)
def __commit(self):
end = self.__get_cursor()
if not end.ends_line():
end.forward_to_line_end()
text = self.__get_line()
self.__move_cursor_to(end)
self.freeze_undo()
self.__insert(end, "\n")
self.in_raw_input = False
self.history.commit(text)
self.do_raw_input(text)
self.thaw_undo()
def do_raw_input(self, text):
pass
def write(self,whatever):
self.buffer.insert_at_cursor(whatever)
class _Console(_ReadLine, code.InteractiveInterpreter):
def __init__(self, locals=None, banner=None,
completer=None, use_rlcompleter=True,
start_script=None):
_ReadLine.__init__(self)
code.InteractiveInterpreter.__init__(self, locals)
self.locals['__console__'] = self
self.start_script = start_script
self.completer = completer
self.banner = banner
if not self.completer and use_rlcompleter:
try:
import rlcompleter
self.completer = rlcompleter.Completer()
except ImportError:
pass
self.ps1 = ">>> "
self.ps2 = "... "
self.__start()
self.run_on_raw_input = start_script
self.raw_input(self.ps1)
def __start(self):
self.cmd_buffer = ""
self.freeze_undo()
self.thaw_undo()
self.buffer.set_text("")
if self.banner:
iter = self.buffer.get_start_iter()
self.buffer.insert(iter, self.banner)
if not iter.starts_line():
self.buffer.insert(iter, "\n")
def clear(self, start_script=None):
if start_script is None:
start_script = self.start_script
else:
self.start_script = start_script
self.__start()
self.run_on_raw_input = start_script
def do_raw_input(self, text):
if self.cmd_buffer:
cmd = self.cmd_buffer + "\n" + text
else:
cmd = text
if self.runsource(cmd):
self.cmd_buffer = cmd
ps = self.ps2
else:
self.cmd_buffer = ''
ps = self.ps1
self.raw_input(ps)
def runcode(self, code):
saved = sys.stdout
sys.stdout = self
try:
eval(code, self.locals)
except SystemExit:
raise
except:
self.showtraceback()
sys.stdout = saved
def complete_attr(self, start, end):
try:
obj = eval(start, self.locals)
strings = dir(obj)
if end:
completions = {}
for s in strings:
if s.startswith(end):
completions[s] = None
completions = completions.keys()
else:
completions = strings
completions.sort()
return [start + "." + s for s in completions]
except:
return None
def complete(self, text):
if self.completer:
completions = []
i = 0
try:
while 1:
s = self.completer.complete(text, i)
if s:
completions.append(s)
i = i + 1
else:
completions.sort()
return completions
except NameError:
return None
dot = text.rfind(".")
if dot >= 0:
return self.complete_attr(text[:dot], text[dot+1:])
completions = {}
strings = keyword.kwlist
if self.locals:
strings.extend(self.locals.keys())
try: strings.extend(eval("globals()", self.locals).keys())
except: pass
try:
exec "import __builtin__" in self.locals
strings.extend(eval("dir(__builtin__)", self.locals))
except:
pass
for s in strings:
if s.startswith(text):
completions[s] = None
completions = completions.keys()
completions.sort()
return completions
def flush(self):
pass
def tell(self):
return 0
def seek(self, pos):
pass
def isatty(self):
return False
def truncate(self):
raise IOError, "Illegal seek"
def ReadLineType(t=gtk.TextView):
class readline(t, _ReadLine):
def __init__(self, *args, **kwargs):
t.__init__(self)
_ReadLine.__init__(self, *args, **kwargs)
def do_key_press_event(self, event):
return _ReadLine.do_key_press_event(self, event, t)
gobject.type_register(readline)
return readline
def ConsoleType(t=gtk.TextView):
class console(t, _Console):
def __init__(self, *args, **kwargs):
t.__init__(self)
_Console.__init__(self, *args, **kwargs)
def do_key_press_event(self, event):
return _Console.do_key_press_event(self, event, t)
gobject.type_register(console)
return console
ReadLine = ReadLineType()
Console = ConsoleType()
if __name__ == '__main__':
window = gtk.Window()
swin = gtk.ScrolledWindow()
swin.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_ALWAYS)
window.add(swin)
swin.add(Console(banner="Hello there!",
use_rlcompleter=False,
start_script="import gtk\n" + \
"win = gtk.Window()\n" + \
"label = gtk.Label('Hello there!')\n" + \
"win.add(label)\n" + \
"win.show_all()\n"))
window.set_default_size(400, 300)
window.show_all()
if not gtk.main_level():
window.connect("destroy", gtk.main_quit)
gtk.main()
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