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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
import curses
import sys
import time
import token
import tokenize
from story5.node import alt_repr
class Visualizer:
def __init__(self):
self.offsets = [0]
self.cursor_x = 0
self.symbols = []
self.stack = []
self.cache = []
self.past = []
self.future = []
self.w = curses.initscr()
curses.noecho()
self.w.keypad(True)
self.vis_tokens([], 0)
self.going = True
self.display_and_wait()
def close(self):
curses.echo()
curses.endwin()
def get_state(self):
return (self.cursor_x, self.symbols[:], self.stack[:], self.cache[:])
def set_state(self, state):
self.cursor_x, self.symbols, self.stack, self.cache = state
def wait(self):
while True:
key = self.w.getch()
if key == ord('q'):
sys.exit(0)
if key == ord('b') or key == curses.KEY_BACKSPACE or key == 127 or key == curses.KEY_DC or key == curses.KEY_LEFT:
if self.past:
self.future.append(self.get_state())
self.set_state(self.past.pop())
self.display()
continue
else:
curses.flash()
continue
if key == ord('f') or key == ord(' ') or key == curses.KEY_RIGHT:
if self.future:
self.past.append(self.get_state())
self.set_state(self.future.pop())
self.display()
continue
else:
if self.going:
self.past.append(self.get_state())
## else:
## curses.flash()
return
w = self.w
w.move(curses.LINES - 1, max(0, curses.COLS - 10))
w.addstr(f"[{key}]")
curses.beep() # Unrecognized input.
def done(self):
self.going = False
while True:
curses.flash()
self.wait()
def vis_tokens(self, tokens, pos):
w = self.w
symbols = []
for t in tokens:
s = alt_repr(t)
symbols.append(s)
self.symbols = symbols
offset = 0
offsets = [offset]
for s in symbols:
offset += len(s) + 1
offsets.append(offset)
self.offsets = offsets
self.cursor_x = offsets[pos]
def display(self):
w = self.w
w.move(0, 0)
w.clrtobot()
y = (curses.LINES // 2 - 1) - len(self.stack)
clip = 0
if y < 0:
clip = -y
y = 0
for (pos, s, res), rule in self.stack[clip:]:
if rule and not res:
name, alts, indices = rule
x = self.offsets[pos]
w.move(y, x)
w.addnstr(name + ":", curses.COLS - x)
y, x = w.getyx()
if not indices:
indices = 0, 0, 0
alt_index, item_index, num_items = indices
for alt_i, alt in enumerate(alts):
if alt_i > 0:
w.addnstr(" |", curses.COLS - x)
y, x = w.getyx()
for item_i, item in enumerate(alt):
if alt_i == alt_index and item_index < item_i < item_index + num_items:
attr = curses.A_UNDERLINE
else:
attr = 0
w.addnstr(" ", curses.COLS - x, attr)
y, x = w.getyx()
if alt_i == alt_index and item_index <= item_i < item_index + num_items:
attr = curses.A_UNDERLINE
else:
attr = 0
w.addnstr(item, curses.COLS - x, attr)
y, x = w.getyx()
else:
if self.offsets[pos] >= curses.COLS:
continue
if res:
s += " -> " + res
w.addnstr(y, self.offsets[pos], s, curses.COLS - self.offsets[pos])
y += 1
w.addstr(y, 0, "-"*curses.COLS)
y += 1
cursor_y = y
w.addnstr(y, 0, " ".join(self.symbols), curses.COLS)
y += 1
w.addstr(y, 0, "-"*curses.COLS)
y += 1
for pos, s, res in reversed(self.cache):
if y >= curses.LINES:
break
if self.offsets[pos] >= curses.COLS:
continue
if res:
s += " -> " + res
w.addnstr(y, self.offsets[pos], s, curses.COLS - self.offsets[pos])
y += 1
w.move(cursor_y, min(curses.COLS - 1, self.cursor_x))
def display_and_wait(self):
self.display()
self.wait()
def call_repr(self, name, args):
if name == 'expect' and len(args) == 1:
if isinstance(args[0], int):
s = f"{name}({token.tok_name.get(args[0], str(args[0]))})"
else:
s = f"{name}({args[0]!r})"
else:
s = name + str(args)
return s
def show_call(self, pos, name, args):
while self.stack and self.stack[-1][0][-1]:
val, rule = self.stack.pop()
v2 = val[:2]
self.cache[:] = [v for v in self.cache if v[:2] != v2]
self.cache.append(val)
w = self.w
s = self.call_repr(name, args)
val = (pos, s, None)
self.stack.append((val, None))
if val in self.cache:
self.cache.remove(val)
self.display_and_wait()
def stuff_cache(self, pos, name, args, res):
res = alt_repr(res)
s = self.call_repr(name, args)
v2 = (pos, s)
self.cache[:] = [v for v in self.cache if v[:2] != v2]
self.cache.append((pos, s, res))
self.display_and_wait()
def show_rule(self, name, alts):
i = len(self.stack) - 1
while i >= 0 and self.stack[i][0][-1]:
i -= 1
top, rule = self.stack[i]
rule = (name, alts, None)
self.stack[i] = (top, rule)
self.display_and_wait()
def show_index(self, alt_index, item_index, num_items):
i = len(self.stack) - 1
while i >= 0 and self.stack[i][0][-1]:
i -= 1
top, rule = self.stack[i]
name, alts, indices = rule
new_rule = (name, alts, (alt_index, item_index, num_items))
if new_rule != rule:
self.stack[i] = top, new_rule
self.display_and_wait()
def show_return(self, pos, res, endpos):
i = len(self.stack) - 1
while i >= 0 and self.stack[i][0][-1]:
i -= 1
top, rule = self.stack[i]
top_pos, top_s, top_res = top
top_res = alt_repr(res)
top = top_pos, top_s, top_res
self.stack[i] = top, rule
self.display_and_wait()
|
