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#!/usr/bin/env python
"""
Work in progress version of a PDB prompt.
This is an example of "prompt_toolkit.contrib.shell". It's still very
incomplete, non-functional and experimental. But it shows the direction we're
heading.
"""
from pygments.token import Token, Keyword, Operator, Number, Name, Error, Comment
from pygments.style import Style
from prompt_toolkit import CommandLineInterface, AbortAction
from prompt_toolkit.contrib.shell.completion import ShellCompleter
from prompt_toolkit.contrib.shell.rules import Any, Sequence, Literal, Variable, Repeat
from prompt_toolkit.contrib.shell.layout import CompletionHint
from prompt_toolkit.contrib.shell.parse_info import get_parse_info, InvalidCommandException
from prompt_toolkit import Exit
from prompt_toolkit.line import Line
from prompt_toolkit.layout.menus import CompletionMenu
from prompt_toolkit.layout import Layout
from prompt_toolkit.layout.prompt import DefaultPrompt
grammar = Any([
Sequence([
Any([
Literal('b', dest='cmd_break'),
Literal('break', dest='cmd_break'),
Literal('tbreak', dest='tbreak'),
]),
Variable(placeholder='<file:lineno/function>', dest='break_line'),
Variable(placeholder='<condition>', dest='break_condition'),
]),
Sequence([
Literal('condition', dest='cmd_condition'),
Variable(placeholder='<bpnumber>', dest='condition_bpnumber'),
Variable(placeholder='<str_condition>', dest='condition_str')
]),
Sequence([
Any([
Literal('l', dest='cmd_list'),
Literal('list', dest='cmd_list'),
]),
Variable(placeholder='<first>', dest='list_first'),
Variable(placeholder='<last>', dest='list_last')
]),
Sequence([
Literal('debug'),
Variable(placeholder='<code>'),
]),
Sequence([
Literal('disable'),
Variable(placeholder='<bpnumber>'),
]),
Sequence([
Literal('enable'),
Repeat(Variable(placeholder='<bpnumber>')),
]),
Sequence([
Literal('ignore'),
Variable(placeholder='<bpnumber>'),
Variable(placeholder='<count>'),
]),
Sequence([
Literal('run'),
Repeat(Variable(placeholder='<args>')),
]),
Sequence([
Literal('alias'),
Variable(placeholder='<name>'),
Variable(placeholder='<command>'),
Repeat(Variable(placeholder='<parameter>')),
]),
Sequence([
Any([
Literal('h'),
Literal('help'),
]),
Variable(placeholder='<command>'),
]),
Sequence([
Literal('unalias'),
Variable(placeholder='<name>'),
]),
Sequence([
Literal('jump'),
Variable(placeholder='<lineno>'),
]),
Sequence([
Literal('whatis'),
Variable(placeholder='<arg>'),
]),
Sequence([
Literal('pp'),
Variable(placeholder='<expression>'),
]),
Sequence([
Literal('p'),
Variable(placeholder='<expression>'),
]),
Sequence([
Any([
Literal('cl'),
Literal('clear'),
]),
Repeat(Variable(placeholder='<bpnumber>')),
]),
Any([
Literal('a'),
Literal('args'),
]),
Any([
Literal('cont'),
Literal('continue'),
]),
Any([
Literal('d'),
Literal('down'),
]),
Any([
Literal('exit'),
Literal('q'),
Literal('quit'),
]),
Any([
Literal('n'),
Literal('next'),
]),
Any([
Literal('run'),
Literal('restart'),
]),
Any([
Literal('unt'),
Literal('until'),
]),
Any([
Literal('u'),
Literal('up'),
]),
Any([
Literal('r'),
Literal('return'),
]),
Any([
Literal('w', dest='where'),
Literal('where', dest='where'),
Literal('bt'),
]),
Any([
Literal('s'),
Literal('step'),
]),
Literal('commands'),
])
class PdbStyle(Style):
background_color = None
styles = {
# Pdb commands highlighting.
Token.Placeholder: "#aa8888",
Token.Placeholder.Variable: "#aa8888",
Token.Placeholder.Bracket: "bold #ff7777",
Token.Placeholder.Separator: "#ee7777",
Token.Aborted: "#aaaaaa",
Token.Prompt: "bold",
# Python code highlighting.
Keyword: '#ee00ee',
Operator: '#aa6666',
Number: '#ff0000',
Name: '#008800',
Token.Literal.String: '#440000',
Comment: '#0000dd',
Error: '#000000 bg:#ff8888',
# Completion Menu
Token.Menu.Completer.Completion.Current: 'bg:#00aaaa #000000',
Token.Menu.Completer.Completion: 'bg:#008888 #ffffff',
Token.Menu.Completer.ProgressButton: 'bg:#003333',
Token.Menu.Completer.ProgressBar: 'bg:#00aaaa',
}
if __name__ == '__main__':
cli = CommandLineInterface(
layout=Layout(before_input=DefaultPrompt('(pdb) '),
after_input=CompletionHint(grammar),
menus=[CompletionMenu()]),
line=Line(completer=ShellCompleter(grammar)),
style=PdbStyle)
try:
while True:
document = cli.read_input(on_exit=AbortAction.RAISE_EXCEPTION)
try:
parse_info = get_parse_info(grammar, document)
except InvalidCommandException:
print('Invalid command\n')
continue
else:
print(parse_info.get_variables())
except Exit:
pass
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