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implement more
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""" | ||
more | ||
""" | ||
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from math import ceil | ||
import os | ||
import sys | ||
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class More: | ||
""" | ||
implements 'more' behaviour | ||
""" | ||
ansi_cleaner = lambda x: x | ||
step_length = 0 | ||
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@staticmethod | ||
def setup(ansi_cleaner = lambda x: x, step_length: int = 0): | ||
""" | ||
setup the configuration | ||
Parameters: | ||
ansi_cleaner (function): | ||
remove_ansi_codes_from_line | ||
step_length (int): | ||
defines how many lines should be displayed before pausing. | ||
a value of 0 is equivalent to the size of the terminal window | ||
""" | ||
More.ansi_cleaner = ansi_cleaner | ||
More.step_length = step_length | ||
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def __init__(self, lines: list = None) -> None: | ||
self.lines = lines if lines else [] | ||
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def add_line(self, line: str) -> None: | ||
""" | ||
add a single line. | ||
Parameters: | ||
line (str): | ||
the line to append | ||
""" | ||
self.lines.append(line) | ||
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def add_lines(self, lines: list) -> None: | ||
""" | ||
add multiple lines. | ||
Parameters: | ||
lines (list): | ||
the list of lines to append | ||
""" | ||
self.lines += lines | ||
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def step_through(self) -> None: | ||
""" | ||
step through the lines and wait for user input. | ||
""" | ||
def pause_output(percentage: int) -> str: | ||
try: | ||
user_input = input(f"-- More ({percentage: >2}%) -- ").upper() | ||
except EOFError: | ||
user_input = '' | ||
if not os.isatty(sys.stdin.fileno()): | ||
print() # emulate enter-press on piped input | ||
print('\x1b[1F\x1b[2K', end='', flush=True) # clear input() line | ||
return user_input | ||
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try: | ||
t_width, t_height = os.get_terminal_size() | ||
t_width, t_height = max(t_width-1, 1), max(t_height-1, 1) | ||
except OSError: # PyPy-Error: "Inappropriate ioctl for device" | ||
t_width, t_height = 119, 29 | ||
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i_length = len(self.lines) | ||
first_chunk, chunk_s = True, 1 | ||
for nr, line in enumerate(self.lines, start=1): | ||
print(line) | ||
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if len(More.ansi_cleaner(line)) > t_width: | ||
chunk_s += ceil(len(More.ansi_cleaner(line)) / t_width)-1 | ||
if chunk_s >= t_height and nr < i_length: | ||
user_input = '?' | ||
while user_input in ['?', 'H', 'HELP']: | ||
user_input = pause_output(nr*100//i_length) | ||
if user_input in ['?', 'H', 'HELP']: | ||
print('Q QUIT quit') | ||
print('N NEXT skip to next file') | ||
continue | ||
if user_input in ['N', 'NEXT']: | ||
return | ||
if user_input in ['\x11', 'Q', 'QUIT']: # '\x11' = ^Q | ||
sys.exit(0) | ||
if first_chunk: | ||
first_chunk = False | ||
if More.step_length > 0: | ||
t_height = More.step_length | ||
chunk_s = 0 | ||
chunk_s += 1 |