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Refactor matricizer, fix some linter complaints

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* Matricizer.choose_dimensions was not actually being used. It has been
  removed, and dimensions of the hash matrix are now determined
  internally by the matricizer, rather than in its constructor.
* Linter was complaining about missing documentation and some other
  minor styling things so those are fixed
* Linter had a few more stupid lints enabled ("too-many-statements"?
  really? god forbid your code is too long, I'm not a computer science
  student, come on guys)

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
This commit is contained in:
Alek Ratzloff
2024-06-03 12:20:07 -07:00
parent 2b30070851
commit c17326f4e7
6 changed files with 117 additions and 102 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
.pylintrc
View File

@@ -438,7 +438,9 @@ disable=raw-checker-failed,
use-implicit-booleaness-not-comparison-to-zero,
too-many-locals,
too-few-public-methods,
line-too-long
too-many-statements,
line-too-long,
redefined-builtin,
# Enable the message, report, category or checker with the given id(s). You can
# either give multiple identifier separated by comma (,) or put this option

23
colorhash/cli.py
View File

@@ -7,12 +7,10 @@ import textwrap
from .color import colorize
from .matricizer import Matricizer, NibbleMatricizer, RandomartMatricizer
from .palettes import Palette, DEFAULT_PALETTES, PALETTES
from .palettes import Palette, PALETTES
from .writer import ANSIWriter, SVGWriter, Writer
# TODO - WASM compile for embedding directly in HTML
# - this may not be an option, sadly. might have to just port it to JS
# TODO - option to add a caption based on the filename (for SVG)
# TODO - load palettes from a file
# TODO - PNG output
@@ -36,11 +34,13 @@ def cli_main() -> None:
PALETTE_HELP = "\n".join(
[
"PALETTE CHOICES",
'\n'.join(textwrap.wrap(
"\n".join(
textwrap.wrap(
", ".join(PALETTE_CHOICES),
initial_indent=" ",
subsequent_indent=" ",
)),
)
),
]
)
HASH_CHOICES = ["md5", "sha1", "sha224", "sha256", "sha384", "sha512"]
@@ -59,7 +59,9 @@ def cli_main() -> None:
OUTPUT_TYPE_HELP = "OUTPUT TYPE (-y, --output-type)\n" + "\n".join(
[f" {choice} - {desc}" for choice, desc in OUTPUT_TYPE_CHOICES.items()]
)
EPILOGUE = "\n\n".join([MATRIX_HELP, PALETTE_HELP, INPUT_TYPE_HELP, OUTPUT_TYPE_HELP])
EPILOGUE = "\n\n".join(
[MATRIX_HELP, PALETTE_HELP, INPUT_TYPE_HELP, OUTPUT_TYPE_HELP]
)
progname: str = sys.argv[0]
if progname.endswith("__main__.py"):
@@ -175,13 +177,9 @@ def cli_main() -> None:
matricizer: Matricizer
match args.matrix:
case "nibble":
w, h = NibbleMatricizer.DIMENSIONS[args.hash]
matricizer = NibbleMatricizer(w, h)
matricizer = NibbleMatricizer()
case "randomart":
# 17x9 is what openssh uses
# TODO - allow configuring dimensions, maybe
w, h = RandomartMatricizer.DIMENSIONS[args.hash]
matricizer = RandomartMatricizer(w, h)
matricizer = RandomartMatricizer()
case _:
assert False, f"invalid args.matrix: {args.matrix}"
@@ -210,4 +208,3 @@ def cli_main() -> None:
sys.stdout.write(output)
else:
args.out.write_text(output)

73
colorhash/matricizer.py
View File

@@ -1,5 +1,6 @@
"All things that turn a hash into a matrix."
import abc
import re
from typing import Mapping, Sequence
from .palettes import Palette, DEFAULT_PALETTES, GRADIENT_PALETTES, MULTICOLOR_PALETTES
@@ -8,6 +9,27 @@ from .palettes import Palette, DEFAULT_PALETTES, GRADIENT_PALETTES, MULTICOLOR_P
Matrix = Sequence[Sequence[int]]
def detect_hash_algorithm(hash_or_algo: str | bytes) -> str | None:
dimensions: Mapping[int, str] = {
32: "md5",
40: "sha1",
56: "sha224",
64: "sha256",
96: "sha384",
128: "sha512",
}
if isinstance(hash_or_algo, bytes):
return dimensions.get(len(hash_or_algo) * 2)
hoa = hash_or_algo.lower()
if re.match(r"^([0-9a-fA-F]{2})+$", hoa):
return dimensions.get(len(hoa))
elif hoa in list(dimensions.values()):
return hoa
else:
return None
class Matricizer(metaclass=abc.ABCMeta):
"""
The base Matricizer class.
@@ -16,16 +38,6 @@ class Matricizer(metaclass=abc.ABCMeta):
(inclusive). The method by which this is done is up to the matricizer.
"""
def __init__(self, w: int, h: int) -> None:
"""
Create a new matricizer for the given dimensions.
:param w: the width of the output matrix.
:param h: the height of hte output matrix.
"""
self.w = w
self.h = h
@abc.abstractmethod
def matricize(self, data: bytes) -> Matrix:
"""
@@ -35,16 +47,6 @@ class Matricizer(metaclass=abc.ABCMeta):
:returns: the matrix converted from the hash data.
"""
@staticmethod
@abc.abstractmethod
def choose_dimensions(hash: str) -> tuple[int, int]:
"""
Choose the dimensions for this matrix based on the hash algorithm.
:param hash: the hash algorithm being used.
:returns: a width and height as a tuple.
"""
def choose_palette(
self, data: bytes, palettes: Mapping[str, Palette] | None = None
) -> Palette:
@@ -84,32 +86,31 @@ class NibbleMatricizer(Matricizer):
:returns: the matrix converted from the hash data.
"""
algo = detect_hash_algorithm(data)
w, h = self.DIMENSIONS[algo]
nibbles = []
for b in data:
top = (b & 0xF0) >> 4
bottom = b & 0x0F
nibbles += [top, bottom]
if len(nibbles) != self.w * self.h:
if len(nibbles) != w * h:
raise ValueError(
f"input data length ({len(nibbles)}) must match matrix dimensions "
f"({self.w}x{self.h} = {self.w * self.h})"
f"({w}x{h} = {w * h})"
)
cols = []
row = []
for b in nibbles:
row += [b]
if len(row) == self.w:
if len(row) == w:
cols += [row]
row = []
return cols
@staticmethod
def choose_dimensions(hash: str) -> tuple[int, int]:
return NibbleMatricizer.DIMENSIONS[hash]
def choose_palette(
self, data: bytes, palettes: Mapping[str, Palette] | None = None
) -> Palette:
@@ -150,10 +151,12 @@ class RandomartMatricizer(Matricizer):
:param data: the hash data to turn into a matrix.
:returns: the matrix converted from the hash data.
"""
algo = detect_hash_algorithm(data)
w, h = self.DIMENSIONS[algo]
rows = [[0] * self.w for _ in range(self.h)]
c = self.w // 2
r = self.h // 2
rows = [[0] * w for _ in range(h)]
c = w // 2
r = h // 2
for value in data:
for _ in range(4):
if value & 0x1:
@@ -164,18 +167,14 @@ class RandomartMatricizer(Matricizer):
r += 1
else:
r -= 1
c = min(max(c, 0), self.w - 1)
r = min(max(r, 0), self.h - 1)
c = min(max(c, 0), w - 1)
r = min(max(r, 0), h - 1)
# max value is 0xf
if rows[r][c] < 0xF:
rows[r][c] += 1
value >>= 2;
value >>= 2
return rows
@staticmethod
def choose_dimensions(hash: str) -> tuple[int, int]:
return RandomartMatricizer.DIMENSIONS[hash]
def choose_palette(
self, data: bytes, palettes: Mapping[str, Palette] | None = None
) -> Palette:

1
colorhash/palettes.py
View File

@@ -1,5 +1,4 @@
"Base color palette definitions."
import abc
from typing import Sequence
from .color import Color, HSLColor

32
colorhash/writer.py
View File

@@ -1,3 +1,4 @@
"Colorhash writer classes"
import abc
from .color import Color, ColorMatrix
@@ -13,30 +14,47 @@ class Writer(metaclass=abc.ABCMeta):
@abc.abstractmethod
def write(self, matrix: ColorMatrix) -> str:
"Write the color matrix to a string."
"""
Write the color matrix to a string.
:param matrix: the color matrix to generate the SVG for.
:returns: the full generated SVG as a string.
"""
class ANSIWriter(Writer):
"""
ANSI terminal writer. This will output a 24-bit true color string.
"""
def write(self, matrix: ColorMatrix) -> str:
ESC = "\x1b"
RESET = f"{ESC}[0m"
C = "██"
"""
Write the color matrix to an ANSI string.
:param matrix: the color matrix to generate the SVG for.
:returns: the full generated SVG as a string.
"""
esc = "\x1b"
reset = f"{esc}[0m"
c = "██"
def ansi_color(c: Color) -> str:
c = c.to_rgb()
return f"{ESC}[38;2;{round(c.r)};{round(c.g)};{round(c.b)}m"
return f"{esc}[38;2;{round(c.r)};{round(c.g)};{round(c.b)}m"
out = ""
for row in matrix:
for col in row:
out += ansi_color(col)
out += C
out += c
out += "\n"
out += RESET
out += reset
return out
class SVGWriter(Writer):
"""
SVG string writer.
"""
def __init__(self, square_size: int) -> None:
"""
Create a new SVG writer that uses the given square size.

80
examples/commithash.svg
View File

@@ -1,42 +1,42 @@
<svg width="256" height="160" xmlns="http://www.w3.org/2000/svg">
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</svg>
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