Helper functions for creating Mintty color scheme with Python

minttycolor.py

"""
Manipulate color schemes for mintty

For simplicity, support only "value = r, g, b" format with decimal values


Copyright 2017 Vitaly Potyarkin

Licensed under the Apache License, Version 2.0
http://www.apache.org/licenses/LICENSE-2.0
"""


import re
from collections import namedtuple


COLOR_LINE = re.compile(r"^\s*(?P<name>\w+)\s*=\s*"
                        r"(?P<red>\d+)\s*,\s*"
                        r"(?P<green>\d+)\s*,\s*"
                        r"(?P<blue>\d+)\s*$")


RGB = namedtuple("RGB", "red green blue")


def load(filename):
    """Read mintty color theme from file"""
    result = dict()
    with open(filename) as file:
        for line in file:
            color = COLOR_LINE.match(line)
            if color:
                option, *values = color.groups()
                result[option] = RGB._make(int(v) for v in values)
    return result


def dump(colors, filename):
    """
    Write colors dictionary into a file.

    colors has to be a mapping where keys are valid minttyrc options, and
    values are iterables of three items corresponding to decimal RGB values.
    """
    TEMPLATE = "{color: <20} = {red: >3}, {green: >3}, {blue: >3}\n"
    with open(filename, "w", newline="\n") as file:  # newlines matter for mintty
        for name, value in colors.items():
            rgb = dict(zip("red green blue".split(), value))
            file.write(TEMPLATE.format(color=name, **rgb))


def valid_changer(changer):
    """Add validation to changer function"""
    def change(value):
        return min(255, max(0, int(changer(value))))
    return change


def change_all(colors, changer):
    """Apply changer() function to each value in colors dictionary"""
    change = valid_changer(changer)
    new_colors = dict()
    for color, rgb in colors.items():
        new_colors[color] = RGB._make(change(x) for x in rgb)
    return new_colors


def change_by_name(colors, changer, name):
    """Apply changer() only to colors that match name"""
    colors_done = dict()
    colors_to_change = dict()
    for color, value in colors.items():
        if name.lower() in color.lower():
            colors_to_change[color] = value
        else:
            colors_done[color] = value
    colors_done.update(change_all(colors_to_change, changer))
    return colors_done

vp-seoul256-light.minttyrc

BackgroundColour=255,255,255
ForegroundColour=0,0,0
CursorColour=0,0,0
Black=0,0,0
BoldBlack=58,58,58
Red=135,55,55
BoldRed=135,1,0
Green=55,96,55
BoldGreen=0,95,0
Yellow=175,135,96
BoldYellow=216,134,95
Blue=95,135,174
BoldBlue=0,135,175
Magenta=135,95,135
BoldMagenta=135,2,95
Cyan=95,135,135
BoldCyan=0,135,135
White=100,100,100
BoldWhite=120,120,120

vp-seoul256-white.minttyrc

BackgroundColour=255,255,255
ForegroundColour=0,0,0
CursorColour=0,0,0
Black=0,0,0
BoldBlack=58,58,58
Red=135,55,55
BoldRed=135,1,0
Green=55,96,55
BoldGreen=0,95,0
Yellow=175,135,96
BoldYellow=216,134,95
Blue=95,135,174
BoldBlue=0,135,175
Magenta=135,95,135
BoldMagenta=135,2,95
Cyan=95,135,135
BoldCyan=0,135,135
White=228,228,228
BoldWhite=238,238,238

vp-white-theme.minttyrc

Black                =   0,   0,   0
Yellow               = 166, 118,  66
Blue                 =  54,  87, 165
CursorColour         =  27,  27,  27
ForegroundColour     =  27,  27,  27
BoldRed              = 173, 118, 135
Magenta              = 132,  54, 165
BoldBlue             = 118, 135, 173
BoldWhite            = 183, 183, 183
BoldGreen            = 135, 173, 118
Green                =  87, 165,  54
Cyan                 =  54, 165, 132
Red                  = 165,  54,  87
White                = 155, 155, 155
BoldYellow           = 173, 141, 124
BoldCyan             = 118, 173, 157
BackgroundColour     = 255, 255, 255
BoldBlack            =  27,  27,  27
BoldMagenta          = 157, 118, 173

vp-white2.minttyrc

BackgroundColour=255,255,255
ForegroundColour=0,0,0
CursorColour=0,0,0
Black=0,0,0
BoldBlack=29,29,29
Red=115,66,30
BoldRed=222,166,127
Green=30,115,66
BoldGreen=127,222,166
Yellow=80,115,30
BoldYellow=182,222,127
Blue=66,30,115
BoldBlue=166,127,222
Magenta=115,30,80
BoldMagenta=222,127,182
Cyan=30,80,115
BoldCyan=127,182,222
White=202,202,202
BoldWhite=237,237,237