commandwin.py
3.88 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
##===-- commandwin.py ----------------------------------------*- Python -*-===##
##
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
##
##===----------------------------------------------------------------------===##
import cui
import curses
import lldb
from itertools import islice
class History(object):
def __init__(self):
self.data = {}
self.pos = 0
self.tempEntry = ''
def previous(self, curr):
if self.pos == len(self.data):
self.tempEntry = curr
if self.pos < 0:
return ''
if self.pos == 0:
self.pos -= 1
return ''
if self.pos > 0:
self.pos -= 1
return self.data[self.pos]
def next(self):
if self.pos < len(self.data):
self.pos += 1
if self.pos < len(self.data):
return self.data[self.pos]
elif self.tempEntry != '':
return self.tempEntry
else:
return ''
def add(self, c):
self.tempEntry = ''
self.pos = len(self.data)
if self.pos == 0 or self.data[self.pos - 1] != c:
self.data[self.pos] = c
self.pos += 1
class CommandWin(cui.TitledWin):
def __init__(self, driver, x, y, w, h):
super(CommandWin, self).__init__(x, y, w, h, "Commands")
self.command = ""
self.data = ""
driver.setSize(w, h)
self.win.scrollok(1)
self.driver = driver
self.history = History()
def enterCallback(content):
self.handleCommand(content)
def tabCompleteCallback(content):
self.data = content
matches = lldb.SBStringList()
commandinterpreter = self.getCommandInterpreter()
commandinterpreter.HandleCompletion(
self.data, self.el.index, 0, -1, matches)
if matches.GetSize() == 2:
self.el.content += matches.GetStringAtIndex(0)
self.el.index = len(self.el.content)
self.el.draw()
else:
self.win.move(self.el.starty, self.el.startx)
self.win.scroll(1)
self.win.addstr("Available Completions:")
self.win.scroll(1)
for m in islice(matches, 1, None):
self.win.addstr(self.win.getyx()[0], 0, m)
self.win.scroll(1)
self.el.draw()
self.startline = self.win.getmaxyx()[0] - 2
self.el = cui.CursesEditLine(
self.win,
self.history,
enterCallback,
tabCompleteCallback)
self.el.prompt = self.driver.getPrompt()
self.el.showPrompt(self.startline, 0)
def handleCommand(self, cmd):
# enter!
self.win.scroll(1) # TODO: scroll more for longer commands
if cmd == '':
cmd = self.history.previous('')
elif cmd in ('q', 'quit'):
self.driver.terminate()
return
self.history.add(cmd)
ret = self.driver.handleCommand(cmd)
if ret.Succeeded():
out = ret.GetOutput()
attr = curses.A_NORMAL
else:
out = ret.GetError()
attr = curses.color_pair(3) # red on black
self.win.addstr(self.startline, 0, out + '\n', attr)
self.win.scroll(1)
self.el.showPrompt(self.startline, 0)
def handleEvent(self, event):
if isinstance(event, int):
if event == curses.ascii.EOT and self.el.content == '':
# When the command is empty, treat CTRL-D as EOF.
self.driver.terminate()
return
self.el.handleEvent(event)
def getCommandInterpreter(self):
return self.driver.getCommandInterpreter()