X-Git-Url: https://wannabe.guru.org/gitweb/?a=blobdiff_plain;f=text_utils.py;h=94df3e3499756a86955ebc3ee7330e5329720255;hb=36fea7f15ed17150691b5b3ead75450e575229ef;hp=a71a99dff943df0058cf080100c7feeedf97a6ed;hpb=497fb9e21f45ec08e1486abaee6dfa7b20b8a691;p=python_utils.git diff --git a/text_utils.py b/text_utils.py index a71a99d..94df3e3 100644 --- a/text_utils.py +++ b/text_utils.py @@ -2,12 +2,16 @@ """Utilities for dealing with "text".""" +from collections import defaultdict +import logging import math import sys -from typing import List, NamedTuple +from typing import List, NamedTuple, Optional from ansi import fg, reset -import exec_utils + + +logger = logging.getLogger(__file__) class RowsColumns(NamedTuple): @@ -16,7 +20,18 @@ class RowsColumns(NamedTuple): def get_console_rows_columns() -> RowsColumns: - rows, columns = exec_utils.cmd("stty size").split() + """Returns the number of rows/columns on the current console.""" + + from exec_utils import cmd_with_timeout + + try: + rows, columns = cmd_with_timeout( + "stty size", + timeout_seconds=1.0, + ).split() + except Exception as e: + logger.exception(e) + raise Exception('Can\'t determine console size?!') return RowsColumns(int(rows), int(columns)) @@ -30,20 +45,19 @@ def progress_graph( right_end="]", redraw=True, ) -> None: + """Draws a progress graph.""" + percent = current / total ret = "\r" if redraw else "\n" bar = bar_graph( percent, - include_text = True, - width = width, - fgcolor = fgcolor, - left_end = left_end, - right_end = right_end) - print( - bar, - end=ret, - flush=True, - file=sys.stderr) + include_text=True, + width=width, + fgcolor=fgcolor, + left_end=left_end, + right_end=right_end, + ) + print(bar, end=ret, flush=True, file=sys.stderr) def bar_graph( @@ -52,9 +66,17 @@ def bar_graph( include_text=True, width=70, fgcolor=fg("school bus yellow"), + reset=reset(), left_end="[", right_end="]", ) -> None: + """Returns a string containing a bar graph. + + >>> bar_graph(0.5, fgcolor='', reset='') + '[███████████████████████████████████ ] 50.0%' + + """ + if percentage < 0.0 or percentage > 1.0: raise ValueError(percentage) if include_text: @@ -70,13 +92,16 @@ def bar_graph( part_width = math.floor(remainder_width * 8) part_char = [" ", "▏", "▎", "▍", "▌", "▋", "▊", "▉"][part_width] return ( - left_end + - fgcolor + - "█" * whole_width + part_char + - " " * (width - whole_width - 1) + - reset() + - right_end + " " + - text) + left_end + + fgcolor + + "█" * whole_width + + part_char + + " " * (width - whole_width - 1) + + reset + + right_end + + " " + + text + ) def distribute_strings( @@ -86,6 +111,17 @@ def distribute_strings( alignment: str = "c", padding: str = " ", ) -> str: + """ + Distributes strings into a line with a particular justification. + + >>> distribute_strings(['this', 'is', 'a', 'test'], width=40) + ' this is a test ' + >>> distribute_strings(['this', 'is', 'a', 'test'], width=40, alignment='l') + 'this is a test ' + >>> distribute_strings(['this', 'is', 'a', 'test'], width=40, alignment='r') + ' this is a test' + + """ subwidth = math.floor(width / len(strings)) retval = "" for string in strings: @@ -93,27 +129,53 @@ def distribute_strings( string, width=subwidth, alignment=alignment, padding=padding ) retval += string + while len(retval) > width: + retval = retval.replace(' ', ' ', 1) + while len(retval) < width: + retval = retval.replace(' ', ' ', 1) return retval def justify_string_by_chunk( string: str, width: int = 80, padding: str = " " ) -> str: + """ + Justifies a string. + + >>> justify_string_by_chunk("This is a test", 40) + 'This is a test' + >>> justify_string_by_chunk("This is a test", 20) + 'This is a test' + + """ padding = padding[0] first, *rest, last = string.split() w = width - (len(first) + 1 + len(last) + 1) - retval = ( - first + padding + distribute_strings(rest, width=w, padding=padding) + ret = ( + first + + padding + + distribute_strings(rest, width=w, padding=padding) + + padding + + last ) - while len(retval) + len(last) < width: - retval += padding - retval += last - return retval + return ret def justify_string( string: str, *, width: int = 80, alignment: str = "c", padding: str = " " ) -> str: + """Justify a string. + + >>> justify_string('This is another test', width=40, alignment='c') + ' This is another test ' + >>> justify_string('This is another test', width=40, alignment='l') + 'This is another test ' + >>> justify_string('This is another test', width=40, alignment='r') + ' This is another test' + >>> justify_string('This is another test', width=40, alignment='j') + 'This is another test' + + """ alignment = alignment[0] padding = padding[0] while len(string) < width: @@ -122,11 +184,7 @@ def justify_string( elif alignment == "r": string = padding + string elif alignment == "j": - return justify_string_by_chunk( - string, - width=width, - padding=padding - ) + return justify_string_by_chunk(string, width=width, padding=padding) elif alignment == "c": if len(string) % 2 == 0: string += padding @@ -138,7 +196,13 @@ def justify_string( def justify_text(text: str, *, width: int = 80, alignment: str = "c") -> str: - print("-" * width) + """ + Justifies text. + + >>> justify_text('This is a test of the emergency broadcast system. This is only a test.', + ... width=40, alignment='j') #doctest: +NORMALIZE_WHITESPACE + 'This is a test of the emergency\\nbroadcast system. This is only a test.' + """ retval = "" line = "" for word in text.split(): @@ -151,3 +215,99 @@ def justify_text(text: str, *, width: int = 80, alignment: str = "c") -> str: if len(line) > 0: retval += "\n" + line[1:] return retval[1:] + + +def generate_padded_columns(text: List[str]) -> str: + max_width = defaultdict(int) + for line in text: + for pos, word in enumerate(line.split()): + max_width[pos] = max(max_width[pos], len(word)) + + for line in text: + out = "" + for pos, word in enumerate(line.split()): + width = max_width[pos] + word = justify_string(word, width=width, alignment='l') + out += f'{word} ' + yield out + + +def wrap_string(text: str, n: int) -> str: + chunks = text.split() + out = '' + width = 0 + for chunk in chunks: + if width + len(chunk) > n: + out += '\n' + width = 0 + out += chunk + ' ' + width += len(chunk) + 1 + return out + + +class Indenter(object): + """ + with Indenter(pad_count = 8) as i: + i.print('test') + with i: + i.print('-ing') + with i: + i.print('1, 2, 3') + """ + + def __init__( + self, + *, + pad_prefix: Optional[str] = None, + pad_char: str = ' ', + pad_count: int = 4, + ): + self.level = -1 + if pad_prefix is not None: + self.pad_prefix = pad_prefix + else: + self.pad_prefix = '' + self.padding = pad_char * pad_count + + def __enter__(self): + self.level += 1 + return self + + def __exit__(self, exc_type, exc_value, exc_tb): + self.level -= 1 + if self.level < -1: + self.level = -1 + + def print(self, *arg, **kwargs): + import string_utils + + text = string_utils.sprintf(*arg, **kwargs) + print(self.pad_prefix + self.padding * self.level + text, end='') + + +def header(title: str, *, width: int = 80, color: str = ''): + """ + Returns a nice header line with a title. + + >>> header('title', width=60, color='') + '----[ title ]-----------------------------------------------' + + """ + w = width + w -= len(title) + 4 + if w >= 4: + left = 4 * '-' + right = (w - 4) * '-' + if color != '' and color is not None: + r = reset() + else: + r = '' + return f'{left}[ {color}{title}{r} ]{right}' + else: + return '' + + +if __name__ == '__main__': + import doctest + + doctest.testmod()