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296 | END_MARKER = ("end", None)
NEWLINE_1 = ("newline", 1)
def number_of_lines(parsed_text):
lines = 1
for (token, value) in parsed_text:
if token == "newline":
lines += value
return lines
def normalize_tokens(tokens):
result = []
for token in tokens:
key, value = token
if key == "text" and not value:
continue # Remove empty texts
if key == "newline" and result and result[-1][0] == "newline":
result[-1] = ("newline", result[-1][1] + value)
continue
if key == "end" and result[-1][0] == "newline":
last = result[-1]
result[-1] = token
result.append(last)
continue
result.append(token)
if result and result[-1][0] == "newline":
result.pop()
return result
def add_line_numbers(tokens):
lines_len = len(str(number_of_lines(tokens)))
begin = ("begin", "code_lineno")
result = [begin, ("text", "1".zfill(lines_len) + " "), END_MARKER]
line = 1
for token in tokens:
if token[0] != "newline":
result.append(token)
continue
for i in range(token[1]):
line += 1
result.append(NEWLINE_1)
result.append(begin)
result.append(("text", str(line).zfill(lines_len) + " "))
result.append(END_MARKER)
return result
def parse_text(text, escape_char="~", begin_char="{", end_char="}"):
result = []
start = 0
i = 0
counter = 0
while i < len(text):
c = text[i]
if c == escape_char:
result.append(("text", text[start:i]))
i += 1
start = i
while i < len(text) and text[i] != begin_char:
i += 1
result.append(("begin", text[start:i]))
i += 1
start = i
counter += 1
elif c == end_char and counter >= 1:
result.append(("text", text[start:i]))
result.append(END_MARKER)
i += 1
start = i
counter -= 1
else:
i += 1
if i != start:
result.append(("text", text[start:i]))
final_result = []
for r in result:
if r[0] != "text":
final_result.append(r)
continue
lines = r[1].split("\n")
final_result.append(("text", lines[0]))
for line in lines[1:]:
final_result.append(NEWLINE_1)
final_result.append(("text", line))
if counter > 0:
raise Exception("Invalid format, unclosed command")
return normalize_tokens(final_result)
def _open_blocks(tokens):
blocks = []
for token in tokens:
if token[0] == "begin":
blocks.append(token)
elif token[0] == "end":
blocks.pop()
return blocks
def _open_blocks_count(tokens):
count = 0
for token in tokens:
if token[0] == "begin":
count += 1
elif token[0] == "end":
count -= 1
return count
def _get_block_end_index(tokens, index):
assert tokens[index][0] == "begin"
index += 1
count = 0
while index < len(tokens):
name, value = tokens[index]
if name == "begin":
count += 1
elif name == "end":
count -= 1
if count < 0:
return index
index += 1
def extract_line(tokens, index):
b = index
while b >= 0 and tokens[b][0] != "newline":
b -= 1
b += 1
e = index
while e < len(tokens) and tokens[e][0] != "newline":
e += 1
open_blocks = _open_blocks(tokens[:b])
result = open_blocks + tokens[b:e]
result += [END_MARKER] * _open_blocks_count(result)
return result, index - b + len(open_blocks)
def tokens_to_text_without_style(tokens):
result = []
for name, value in tokens:
if name == "text":
result.append(value)
elif name == "newline":
result.append("\n" * value)
return "".join(result)
def tokens_merge(tokens1, tokens2):
tokens = _tokens_merge_helper(tokens1, tokens2)
result = []
opened = []
for token in tokens:
if token[0] != "_block":
result.append(token)
continue
_, index, t = token
if t[0] == "begin":
opened.append(token)
result.append(t)
continue
assert t[0] == "end"
reopen = []
pos = -1
for _, i2, t2 in reversed(opened):
result.append(END_MARKER)
if i2 != index:
pos -= 1
reopen.append(t2)
else:
break
del opened[pos]
result.extend(reopen)
assert not opened
return normalize_tokens(result)
def _tokens_merge_helper(tokens1, tokens2):
result = []
tokens = (tokens1, tokens2)
last = [None, None]
indices = [0, 0]
stacks = ([], [])
def read(i):
index = indices[i]
if index >= len(tokens[i]):
last[i] = ("<END>", None)
else:
last[i] = tokens[i][index]
indices[i] += 1
return last[i]
def new_block(i):
result.append(("_block", i, last[i]))
read(i)
read(0)
read(1)
while True:
((n1, v1), (n2, v2)) = last
if n1 == "end" and (n2 != "end" or stacks[0] > stacks[1]):
stacks[0].pop()
new_block(0)
continue
if n2 == "end":
stacks[1].pop()
new_block(1)
continue
if n1 == "begin":
i1 = indices[0] - 1
if n2 == "begin":
# Find which block is shorter
i2 = indices[1] - 1
t1 = tokens_to_text_without_style(
tokens[0][i1 : _get_block_end_index(tokens[0], i1)]
)
t2 = tokens_to_text_without_style(
tokens[1][i2 : _get_block_end_index(tokens[1], i2)]
)
if len(t1) > len(t2):
stacks[0].append(i1)
new_block(0)
continue
else:
stacks[0].append(i1)
new_block(0)
continue
if n2 == "begin":
stacks[1].append(indices[0] - 1)
new_block(1)
continue
if n1 == "<END>" or n2 == "<END>":
assert n1 == "<END>" and n2 == "<END>"
break
if n1 == "newline" or n2 == "newline":
assert n1 == "newline" and n2 == "newline"
if v1 == v2:
result.append(last[0])
read(0)
read(1)
elif v1 < v2:
result.append(last[0])
last[1] = ("newline", v2 - v1)
read(0)
else:
result.append(last[1])
last[0] = ("newline", v1 - v2)
read(1)
continue
assert n1 == "text" and n2 == "text"
if len(v1) == len(v2):
result.append(last[0])
read(0)
read(1)
continue
if len(v1) < len(v2):
result.append(last[0])
read(0)
last[1] = ("text", v2[len(v1) :])
else:
result.append(last[1])
read(1)
last[0] = ("text", v1[len(v2) :])
return result
def trim_indent(text: str) -> str:
"""Find the smallest common indent from the left in the text and remove it from the text."""
lines = text.splitlines(keepends=False)
min_indent = min(len(line) - len(line.lstrip()) for line in lines if line.strip())
return "\n".join(line[min_indent:] for line in lines)
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