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author | Barry Warsaw <barry@python.org> | 2022-04-17 15:38:44 -0700 |
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committer | GitHub <noreply@github.com> | 2022-04-17 15:38:44 -0700 |
commit | 7173fd5de0cb259b488828634745c03dbea94e6b (patch) | |
tree | 99896e93a25d1efb5394e740a188fd45dfe37583 /Tools/pynche/ColorDB.py | |
parent | ceea0715df33ae6dc3931670b4b749432d4e9707 (diff) | |
download | cpython-git-7173fd5de0cb259b488828634745c03dbea94e6b.tar.gz |
Remove the ancient Pynche color editor (#91554)
Closes #91551
Diffstat (limited to 'Tools/pynche/ColorDB.py')
-rw-r--r-- | Tools/pynche/ColorDB.py | 271 |
1 files changed, 0 insertions, 271 deletions
diff --git a/Tools/pynche/ColorDB.py b/Tools/pynche/ColorDB.py deleted file mode 100644 index c013a60896..0000000000 --- a/Tools/pynche/ColorDB.py +++ /dev/null @@ -1,271 +0,0 @@ -"""Color Database. - -This file contains one class, called ColorDB, and several utility functions. -The class must be instantiated by the get_colordb() function in this file, -passing it a filename to read a database out of. - -The get_colordb() function will try to examine the file to figure out what the -format of the file is. If it can't figure out the file format, or it has -trouble reading the file, None is returned. You can pass get_colordb() an -optional filetype argument. - -Supported file types are: - - X_RGB_TXT -- X Consortium rgb.txt format files. Three columns of numbers - from 0 .. 255 separated by whitespace. Arbitrary trailing - columns used as the color name. - -The utility functions are useful for converting between the various expected -color formats, and for calculating other color values. - -""" - -import sys -import re -from types import * - -class BadColor(Exception): - pass - -DEFAULT_DB = None -SPACE = ' ' -COMMASPACE = ', ' - - - -# generic class -class ColorDB: - def __init__(self, fp): - lineno = 2 - self.__name = fp.name - # Maintain several dictionaries for indexing into the color database. - # Note that while Tk supports RGB intensities of 4, 8, 12, or 16 bits, - # for now we only support 8 bit intensities. At least on OpenWindows, - # all intensities in the /usr/openwin/lib/rgb.txt file are 8-bit - # - # key is (red, green, blue) tuple, value is (name, [aliases]) - self.__byrgb = {} - # key is name, value is (red, green, blue) - self.__byname = {} - # all unique names (non-aliases). built-on demand - self.__allnames = None - for line in fp: - # get this compiled regular expression from derived class - mo = self._re.match(line) - if not mo: - print('Error in', fp.name, ' line', lineno, file=sys.stderr) - lineno += 1 - continue - # extract the red, green, blue, and name - red, green, blue = self._extractrgb(mo) - name = self._extractname(mo) - keyname = name.lower() - # BAW: for now the `name' is just the first named color with the - # rgb values we find. Later, we might want to make the two word - # version the `name', or the CapitalizedVersion, etc. - key = (red, green, blue) - foundname, aliases = self.__byrgb.get(key, (name, [])) - if foundname != name and foundname not in aliases: - aliases.append(name) - self.__byrgb[key] = (foundname, aliases) - # add to byname lookup - self.__byname[keyname] = key - lineno = lineno + 1 - - # override in derived classes - def _extractrgb(self, mo): - return [int(x) for x in mo.group('red', 'green', 'blue')] - - def _extractname(self, mo): - return mo.group('name') - - def filename(self): - return self.__name - - def find_byrgb(self, rgbtuple): - """Return name for rgbtuple""" - try: - return self.__byrgb[rgbtuple] - except KeyError: - raise BadColor(rgbtuple) from None - - def find_byname(self, name): - """Return (red, green, blue) for name""" - name = name.lower() - try: - return self.__byname[name] - except KeyError: - raise BadColor(name) from None - - def nearest(self, red, green, blue): - """Return the name of color nearest (red, green, blue)""" - # BAW: should we use Voronoi diagrams, Delaunay triangulation, or - # octree for speeding up the locating of nearest point? Exhaustive - # search is inefficient, but seems fast enough. - nearest = -1 - nearest_name = '' - for name, aliases in self.__byrgb.values(): - r, g, b = self.__byname[name.lower()] - rdelta = red - r - gdelta = green - g - bdelta = blue - b - distance = rdelta * rdelta + gdelta * gdelta + bdelta * bdelta - if nearest == -1 or distance < nearest: - nearest = distance - nearest_name = name - return nearest_name - - def unique_names(self): - # sorted - if not self.__allnames: - self.__allnames = [] - for name, aliases in self.__byrgb.values(): - self.__allnames.append(name) - self.__allnames.sort(key=str.lower) - return self.__allnames - - def aliases_of(self, red, green, blue): - try: - name, aliases = self.__byrgb[(red, green, blue)] - except KeyError: - raise BadColor((red, green, blue)) from None - return [name] + aliases - - -class RGBColorDB(ColorDB): - _re = re.compile( - r'\s*(?P<red>\d+)\s+(?P<green>\d+)\s+(?P<blue>\d+)\s+(?P<name>.*)') - - -class HTML40DB(ColorDB): - _re = re.compile(r'(?P<name>\S+)\s+(?P<hexrgb>#[0-9a-fA-F]{6})') - - def _extractrgb(self, mo): - return rrggbb_to_triplet(mo.group('hexrgb')) - -class LightlinkDB(HTML40DB): - _re = re.compile(r'(?P<name>(.+))\s+(?P<hexrgb>#[0-9a-fA-F]{6})') - - def _extractname(self, mo): - return mo.group('name').strip() - -class WebsafeDB(ColorDB): - _re = re.compile('(?P<hexrgb>#[0-9a-fA-F]{6})') - - def _extractrgb(self, mo): - return rrggbb_to_triplet(mo.group('hexrgb')) - - def _extractname(self, mo): - return mo.group('hexrgb').upper() - - - -# format is a tuple (RE, SCANLINES, CLASS) where RE is a compiled regular -# expression, SCANLINES is the number of header lines to scan, and CLASS is -# the class to instantiate if a match is found - -FILETYPES = [ - (re.compile('Xorg'), RGBColorDB), - (re.compile('XConsortium'), RGBColorDB), - (re.compile('HTML'), HTML40DB), - (re.compile('lightlink'), LightlinkDB), - (re.compile('Websafe'), WebsafeDB), - ] - -def get_colordb(file, filetype=None): - colordb = None - fp = open(file) - try: - line = fp.readline() - if not line: - return None - # try to determine the type of RGB file it is - if filetype is None: - filetypes = FILETYPES - else: - filetypes = [filetype] - for typere, class_ in filetypes: - mo = typere.search(line) - if mo: - break - else: - # no matching type - return None - # we know the type and the class to grok the type, so suck it in - colordb = class_(fp) - finally: - fp.close() - # save a global copy - global DEFAULT_DB - DEFAULT_DB = colordb - return colordb - - - -_namedict = {} - -def rrggbb_to_triplet(color): - """Converts a #rrggbb color to the tuple (red, green, blue).""" - rgbtuple = _namedict.get(color) - if rgbtuple is None: - if color[0] != '#': - raise BadColor(color) - red = color[1:3] - green = color[3:5] - blue = color[5:7] - rgbtuple = int(red, 16), int(green, 16), int(blue, 16) - _namedict[color] = rgbtuple - return rgbtuple - - -_tripdict = {} -def triplet_to_rrggbb(rgbtuple): - """Converts a (red, green, blue) tuple to #rrggbb.""" - global _tripdict - hexname = _tripdict.get(rgbtuple) - if hexname is None: - hexname = '#%02x%02x%02x' % rgbtuple - _tripdict[rgbtuple] = hexname - return hexname - - -def triplet_to_fractional_rgb(rgbtuple): - return [x / 256 for x in rgbtuple] - - -def triplet_to_brightness(rgbtuple): - # return the brightness (grey level) along the scale 0.0==black to - # 1.0==white - r = 0.299 - g = 0.587 - b = 0.114 - return r*rgbtuple[0] + g*rgbtuple[1] + b*rgbtuple[2] - - - -if __name__ == '__main__': - colordb = get_colordb('/usr/openwin/lib/rgb.txt') - if not colordb: - print('No parseable color database found') - sys.exit(1) - # on my system, this color matches exactly - target = 'navy' - red, green, blue = rgbtuple = colordb.find_byname(target) - print(target, ':', red, green, blue, triplet_to_rrggbb(rgbtuple)) - name, aliases = colordb.find_byrgb(rgbtuple) - print('name:', name, 'aliases:', COMMASPACE.join(aliases)) - r, g, b = (1, 1, 128) # nearest to navy - r, g, b = (145, 238, 144) # nearest to lightgreen - r, g, b = (255, 251, 250) # snow - print('finding nearest to', target, '...') - import time - t0 = time.time() - nearest = colordb.nearest(r, g, b) - t1 = time.time() - print('found nearest color', nearest, 'in', t1-t0, 'seconds') - # dump the database - for n in colordb.unique_names(): - r, g, b = colordb.find_byname(n) - aliases = colordb.aliases_of(r, g, b) - print('%20s: (%3d/%3d/%3d) == %s' % (n, r, g, b, - SPACE.join(aliases[1:]))) |