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Add Hash special coloring mode

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The Hash coloring mode computes a hash for a matched string segment, and
always associates the same color with the same string, yet varies colors
with even small changes.
This commit is contained in:
Louis-Kenzo Furuya Cahier 2013-12-07 22:53:14 +01:00 • committed by Louis-Kenzo Cahier
commit 185be07c80
1 changed files with 28 additions and 1 deletions
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29
colout/colout.py
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@ -15,6 +15,8 @@ import importlib
import logging import logging
import signal import signal
import string import string
import hashlib
import functools
# set the SIGPIPE handler to kill the program instead of # set the SIGPIPE handler to kill the program instead of
# ending in a write error when a broken pipe occurs # ending in a write error when a broken pipe occurs
@ -364,6 +366,31 @@ def colorin(text, color="red", style="normal"):
color = cmap[i] color = cmap[i]
color_code = str(color) color_code = str(color)
# "hash" or "Hash"; useful to randomly but consistently color strings
elif color.lower() == "hash":
hasher = hashlib.md5()
hasher.update(text.encode('utf-8'))
hash = hasher.hexdigest()
f = float(functools.reduce(lambda x, y: x+ord(y), hash, 0) % 101)
if color[0].islower():
mode = 8
cmap = colormaps["rainbow"]
# normalize and scale over the nb of colors in cmap
i = int( math.ceil( (f - scale[0]) / (scale[1]-scale[0]) * (len(cmap)-1) ) )
color = cmap[i]
color_code = str(30 + colors[color])
else:
mode = 256
cmap = colormaps["Rainbow"]
i = int( math.ceil( (f - scale[0]) / (scale[1]-scale[0]) * (len(cmap)-1) ) )
color = cmap[i]
color_code = str(color)
# Really useful only when using colout as a library # Really useful only when using colout as a library
# thus you can change the "colormap" variable to your favorite one before calling colorin # thus you can change the "colormap" variable to your favorite one before calling colorin
elif color == "colormap": elif color == "colormap":
@ -801,7 +828,7 @@ if __name__ == "__main__":
print("Available resources:") print("Available resources:")
print("STYLES: %s" % ", ".join(styles) ) print("STYLES: %s" % ", ".join(styles) )
print("COLORS: %s" % ", ".join(colors) ) print("COLORS: %s" % ", ".join(colors) )
print("SPECIAL: %s" % ", ".join(["random", "Random", "scale", "Scale", "colormap"]) ) print("SPECIAL: %s" % ", ".join(["random", "Random", "scale", "Scale", "hash", "Hash", "colormap"]) )
if len(themes) > 0: if len(themes) > 0:
print("THEMES: %s" % ", ".join(themes.keys()) ) print("THEMES: %s" % ", ".join(themes.keys()) )