644 lines
20 KiB
Python
644 lines
20 KiB
Python
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"""Symbolic primitives + unicode/ASCII abstraction for pretty.py"""
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import sys
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import warnings
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from string import ascii_lowercase, ascii_uppercase
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import unicodedata
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unicode_warnings = ''
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def U(name):
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"""
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Get a unicode character by name or, None if not found.
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This exists because older versions of Python use older unicode databases.
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"""
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try:
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return unicodedata.lookup(name)
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except KeyError:
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global unicode_warnings
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unicode_warnings += 'No \'%s\' in unicodedata\n' % name
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return None
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from sympy.printing.conventions import split_super_sub
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from sympy.core.alphabets import greeks
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from sympy.utilities.exceptions import sympy_deprecation_warning
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# prefix conventions when constructing tables
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# L - LATIN i
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# G - GREEK beta
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# D - DIGIT 0
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# S - SYMBOL +
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__all__ = ['greek_unicode', 'sub', 'sup', 'xsym', 'vobj', 'hobj', 'pretty_symbol',
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'annotated']
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_use_unicode = False
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def pretty_use_unicode(flag=None):
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"""Set whether pretty-printer should use unicode by default"""
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global _use_unicode
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global unicode_warnings
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if flag is None:
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return _use_unicode
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if flag and unicode_warnings:
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# print warnings (if any) on first unicode usage
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warnings.warn(unicode_warnings)
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unicode_warnings = ''
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use_unicode_prev = _use_unicode
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_use_unicode = flag
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return use_unicode_prev
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def pretty_try_use_unicode():
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"""See if unicode output is available and leverage it if possible"""
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encoding = getattr(sys.stdout, 'encoding', None)
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# this happens when e.g. stdout is redirected through a pipe, or is
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# e.g. a cStringIO.StringO
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if encoding is None:
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return # sys.stdout has no encoding
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symbols = []
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# see if we can represent greek alphabet
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symbols += greek_unicode.values()
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# and atoms
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symbols += atoms_table.values()
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for s in symbols:
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if s is None:
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return # common symbols not present!
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try:
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s.encode(encoding)
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except UnicodeEncodeError:
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return
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# all the characters were present and encodable
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pretty_use_unicode(True)
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def xstr(*args):
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sympy_deprecation_warning(
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"""
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The sympy.printing.pretty.pretty_symbology.xstr() function is
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deprecated. Use str() instead.
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""",
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deprecated_since_version="1.7",
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active_deprecations_target="deprecated-pretty-printing-functions"
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)
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return str(*args)
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# GREEK
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g = lambda l: U('GREEK SMALL LETTER %s' % l.upper())
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G = lambda l: U('GREEK CAPITAL LETTER %s' % l.upper())
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greek_letters = list(greeks) # make a copy
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# deal with Unicode's funny spelling of lambda
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greek_letters[greek_letters.index('lambda')] = 'lamda'
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# {} greek letter -> (g,G)
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greek_unicode = {L: g(L) for L in greek_letters}
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greek_unicode.update((L[0].upper() + L[1:], G(L)) for L in greek_letters)
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# aliases
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greek_unicode['lambda'] = greek_unicode['lamda']
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greek_unicode['Lambda'] = greek_unicode['Lamda']
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greek_unicode['varsigma'] = '\N{GREEK SMALL LETTER FINAL SIGMA}'
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# BOLD
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b = lambda l: U('MATHEMATICAL BOLD SMALL %s' % l.upper())
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B = lambda l: U('MATHEMATICAL BOLD CAPITAL %s' % l.upper())
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bold_unicode = {l: b(l) for l in ascii_lowercase}
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bold_unicode.update((L, B(L)) for L in ascii_uppercase)
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# GREEK BOLD
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gb = lambda l: U('MATHEMATICAL BOLD SMALL %s' % l.upper())
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GB = lambda l: U('MATHEMATICAL BOLD CAPITAL %s' % l.upper())
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greek_bold_letters = list(greeks) # make a copy, not strictly required here
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# deal with Unicode's funny spelling of lambda
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greek_bold_letters[greek_bold_letters.index('lambda')] = 'lamda'
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# {} greek letter -> (g,G)
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greek_bold_unicode = {L: g(L) for L in greek_bold_letters}
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greek_bold_unicode.update((L[0].upper() + L[1:], G(L)) for L in greek_bold_letters)
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greek_bold_unicode['lambda'] = greek_unicode['lamda']
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greek_bold_unicode['Lambda'] = greek_unicode['Lamda']
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greek_bold_unicode['varsigma'] = '\N{MATHEMATICAL BOLD SMALL FINAL SIGMA}'
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digit_2txt = {
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'0': 'ZERO',
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'1': 'ONE',
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'2': 'TWO',
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'3': 'THREE',
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'4': 'FOUR',
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'5': 'FIVE',
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'6': 'SIX',
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'7': 'SEVEN',
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'8': 'EIGHT',
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'9': 'NINE',
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}
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symb_2txt = {
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'+': 'PLUS SIGN',
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'-': 'MINUS',
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'=': 'EQUALS SIGN',
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'(': 'LEFT PARENTHESIS',
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')': 'RIGHT PARENTHESIS',
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'[': 'LEFT SQUARE BRACKET',
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']': 'RIGHT SQUARE BRACKET',
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'{': 'LEFT CURLY BRACKET',
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'}': 'RIGHT CURLY BRACKET',
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# non-std
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'{}': 'CURLY BRACKET',
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'sum': 'SUMMATION',
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'int': 'INTEGRAL',
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}
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# SUBSCRIPT & SUPERSCRIPT
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LSUB = lambda letter: U('LATIN SUBSCRIPT SMALL LETTER %s' % letter.upper())
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GSUB = lambda letter: U('GREEK SUBSCRIPT SMALL LETTER %s' % letter.upper())
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DSUB = lambda digit: U('SUBSCRIPT %s' % digit_2txt[digit])
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SSUB = lambda symb: U('SUBSCRIPT %s' % symb_2txt[symb])
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LSUP = lambda letter: U('SUPERSCRIPT LATIN SMALL LETTER %s' % letter.upper())
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DSUP = lambda digit: U('SUPERSCRIPT %s' % digit_2txt[digit])
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SSUP = lambda symb: U('SUPERSCRIPT %s' % symb_2txt[symb])
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sub = {} # symb -> subscript symbol
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sup = {} # symb -> superscript symbol
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# latin subscripts
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for l in 'aeioruvxhklmnpst':
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sub[l] = LSUB(l)
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for l in 'in':
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sup[l] = LSUP(l)
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for gl in ['beta', 'gamma', 'rho', 'phi', 'chi']:
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sub[gl] = GSUB(gl)
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for d in [str(i) for i in range(10)]:
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sub[d] = DSUB(d)
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sup[d] = DSUP(d)
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for s in '+-=()':
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sub[s] = SSUB(s)
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sup[s] = SSUP(s)
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# Variable modifiers
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# TODO: Make brackets adjust to height of contents
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modifier_dict = {
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# Accents
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'mathring': lambda s: center_accent(s, '\N{COMBINING RING ABOVE}'),
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'ddddot': lambda s: center_accent(s, '\N{COMBINING FOUR DOTS ABOVE}'),
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'dddot': lambda s: center_accent(s, '\N{COMBINING THREE DOTS ABOVE}'),
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'ddot': lambda s: center_accent(s, '\N{COMBINING DIAERESIS}'),
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'dot': lambda s: center_accent(s, '\N{COMBINING DOT ABOVE}'),
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'check': lambda s: center_accent(s, '\N{COMBINING CARON}'),
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'breve': lambda s: center_accent(s, '\N{COMBINING BREVE}'),
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'acute': lambda s: center_accent(s, '\N{COMBINING ACUTE ACCENT}'),
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'grave': lambda s: center_accent(s, '\N{COMBINING GRAVE ACCENT}'),
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'tilde': lambda s: center_accent(s, '\N{COMBINING TILDE}'),
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'hat': lambda s: center_accent(s, '\N{COMBINING CIRCUMFLEX ACCENT}'),
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'bar': lambda s: center_accent(s, '\N{COMBINING OVERLINE}'),
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'vec': lambda s: center_accent(s, '\N{COMBINING RIGHT ARROW ABOVE}'),
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'prime': lambda s: s+'\N{PRIME}',
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'prm': lambda s: s+'\N{PRIME}',
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# # Faces -- these are here for some compatibility with latex printing
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# 'bold': lambda s: s,
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# 'bm': lambda s: s,
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# 'cal': lambda s: s,
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# 'scr': lambda s: s,
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# 'frak': lambda s: s,
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# Brackets
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'norm': lambda s: '\N{DOUBLE VERTICAL LINE}'+s+'\N{DOUBLE VERTICAL LINE}',
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'avg': lambda s: '\N{MATHEMATICAL LEFT ANGLE BRACKET}'+s+'\N{MATHEMATICAL RIGHT ANGLE BRACKET}',
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'abs': lambda s: '\N{VERTICAL LINE}'+s+'\N{VERTICAL LINE}',
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'mag': lambda s: '\N{VERTICAL LINE}'+s+'\N{VERTICAL LINE}',
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}
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# VERTICAL OBJECTS
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HUP = lambda symb: U('%s UPPER HOOK' % symb_2txt[symb])
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CUP = lambda symb: U('%s UPPER CORNER' % symb_2txt[symb])
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MID = lambda symb: U('%s MIDDLE PIECE' % symb_2txt[symb])
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EXT = lambda symb: U('%s EXTENSION' % symb_2txt[symb])
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HLO = lambda symb: U('%s LOWER HOOK' % symb_2txt[symb])
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CLO = lambda symb: U('%s LOWER CORNER' % symb_2txt[symb])
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TOP = lambda symb: U('%s TOP' % symb_2txt[symb])
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BOT = lambda symb: U('%s BOTTOM' % symb_2txt[symb])
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# {} '(' -> (extension, start, end, middle) 1-character
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_xobj_unicode = {
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# vertical symbols
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# (( ext, top, bot, mid ), c1)
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'(': (( EXT('('), HUP('('), HLO('(') ), '('),
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')': (( EXT(')'), HUP(')'), HLO(')') ), ')'),
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'[': (( EXT('['), CUP('['), CLO('[') ), '['),
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']': (( EXT(']'), CUP(']'), CLO(']') ), ']'),
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'{': (( EXT('{}'), HUP('{'), HLO('{'), MID('{') ), '{'),
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'}': (( EXT('{}'), HUP('}'), HLO('}'), MID('}') ), '}'),
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'|': U('BOX DRAWINGS LIGHT VERTICAL'),
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'<': ((U('BOX DRAWINGS LIGHT VERTICAL'),
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U('BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO LOWER LEFT'),
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U('BOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO LOWER RIGHT')), '<'),
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'>': ((U('BOX DRAWINGS LIGHT VERTICAL'),
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U('BOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO LOWER RIGHT'),
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U('BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO LOWER LEFT')), '>'),
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'lfloor': (( EXT('['), EXT('['), CLO('[') ), U('LEFT FLOOR')),
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'rfloor': (( EXT(']'), EXT(']'), CLO(']') ), U('RIGHT FLOOR')),
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'lceil': (( EXT('['), CUP('['), EXT('[') ), U('LEFT CEILING')),
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'rceil': (( EXT(']'), CUP(']'), EXT(']') ), U('RIGHT CEILING')),
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'int': (( EXT('int'), U('TOP HALF INTEGRAL'), U('BOTTOM HALF INTEGRAL') ), U('INTEGRAL')),
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'sum': (( U('BOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO LOWER RIGHT'), '_', U('OVERLINE'), U('BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO LOWER LEFT')), U('N-ARY SUMMATION')),
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# horizontal objects
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#'-': '-',
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'-': U('BOX DRAWINGS LIGHT HORIZONTAL'),
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'_': U('LOW LINE'),
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# We used to use this, but LOW LINE looks better for roots, as it's a
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# little lower (i.e., it lines up with the / perfectly. But perhaps this
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# one would still be wanted for some cases?
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# '_': U('HORIZONTAL SCAN LINE-9'),
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# diagonal objects '\' & '/' ?
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'/': U('BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO LOWER LEFT'),
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'\\': U('BOX DRAWINGS LIGHT DIAGONAL UPPER LEFT TO LOWER RIGHT'),
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}
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_xobj_ascii = {
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# vertical symbols
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# (( ext, top, bot, mid ), c1)
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'(': (( '|', '/', '\\' ), '('),
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')': (( '|', '\\', '/' ), ')'),
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# XXX this looks ugly
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# '[': (( '|', '-', '-' ), '['),
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# ']': (( '|', '-', '-' ), ']'),
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# XXX not so ugly :(
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'[': (( '[', '[', '[' ), '['),
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']': (( ']', ']', ']' ), ']'),
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'{': (( '|', '/', '\\', '<' ), '{'),
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'}': (( '|', '\\', '/', '>' ), '}'),
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'|': '|',
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'<': (( '|', '/', '\\' ), '<'),
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'>': (( '|', '\\', '/' ), '>'),
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'int': ( ' | ', ' /', '/ ' ),
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# horizontal objects
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'-': '-',
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'_': '_',
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# diagonal objects '\' & '/' ?
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'/': '/',
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'\\': '\\',
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}
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def xobj(symb, length):
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"""Construct spatial object of given length.
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return: [] of equal-length strings
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"""
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if length <= 0:
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raise ValueError("Length should be greater than 0")
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# TODO robustify when no unicodedat available
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if _use_unicode:
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_xobj = _xobj_unicode
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else:
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_xobj = _xobj_ascii
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vinfo = _xobj[symb]
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c1 = top = bot = mid = None
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if not isinstance(vinfo, tuple): # 1 entry
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ext = vinfo
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else:
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if isinstance(vinfo[0], tuple): # (vlong), c1
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vlong = vinfo[0]
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c1 = vinfo[1]
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else: # (vlong), c1
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vlong = vinfo
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ext = vlong[0]
|
||
|
|
|
||
|
|
try:
|
||
|
|
top = vlong[1]
|
||
|
|
bot = vlong[2]
|
||
|
|
mid = vlong[3]
|
||
|
|
except IndexError:
|
||
|
|
pass
|
||
|
|
|
||
|
|
if c1 is None:
|
||
|
|
c1 = ext
|
||
|
|
if top is None:
|
||
|
|
top = ext
|
||
|
|
if bot is None:
|
||
|
|
bot = ext
|
||
|
|
if mid is not None:
|
||
|
|
if (length % 2) == 0:
|
||
|
|
# even height, but we have to print it somehow anyway...
|
||
|
|
# XXX is it ok?
|
||
|
|
length += 1
|
||
|
|
|
||
|
|
else:
|
||
|
|
mid = ext
|
||
|
|
|
||
|
|
if length == 1:
|
||
|
|
return c1
|
||
|
|
|
||
|
|
res = []
|
||
|
|
next = (length - 2)//2
|
||
|
|
nmid = (length - 2) - next*2
|
||
|
|
|
||
|
|
res += [top]
|
||
|
|
res += [ext]*next
|
||
|
|
res += [mid]*nmid
|
||
|
|
res += [ext]*next
|
||
|
|
res += [bot]
|
||
|
|
|
||
|
|
return res
|
||
|
|
|
||
|
|
|
||
|
|
def vobj(symb, height):
|
||
|
|
"""Construct vertical object of a given height
|
||
|
|
|
||
|
|
see: xobj
|
||
|
|
"""
|
||
|
|
return '\n'.join( xobj(symb, height) )
|
||
|
|
|
||
|
|
|
||
|
|
def hobj(symb, width):
|
||
|
|
"""Construct horizontal object of a given width
|
||
|
|
|
||
|
|
see: xobj
|
||
|
|
"""
|
||
|
|
return ''.join( xobj(symb, width) )
|
||
|
|
|
||
|
|
# RADICAL
|
||
|
|
# n -> symbol
|
||
|
|
root = {
|
||
|
|
2: U('SQUARE ROOT'), # U('RADICAL SYMBOL BOTTOM')
|
||
|
|
3: U('CUBE ROOT'),
|
||
|
|
4: U('FOURTH ROOT'),
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# RATIONAL
|
||
|
|
VF = lambda txt: U('VULGAR FRACTION %s' % txt)
|
||
|
|
|
||
|
|
# (p,q) -> symbol
|
||
|
|
frac = {
|
||
|
|
(1, 2): VF('ONE HALF'),
|
||
|
|
(1, 3): VF('ONE THIRD'),
|
||
|
|
(2, 3): VF('TWO THIRDS'),
|
||
|
|
(1, 4): VF('ONE QUARTER'),
|
||
|
|
(3, 4): VF('THREE QUARTERS'),
|
||
|
|
(1, 5): VF('ONE FIFTH'),
|
||
|
|
(2, 5): VF('TWO FIFTHS'),
|
||
|
|
(3, 5): VF('THREE FIFTHS'),
|
||
|
|
(4, 5): VF('FOUR FIFTHS'),
|
||
|
|
(1, 6): VF('ONE SIXTH'),
|
||
|
|
(5, 6): VF('FIVE SIXTHS'),
|
||
|
|
(1, 8): VF('ONE EIGHTH'),
|
||
|
|
(3, 8): VF('THREE EIGHTHS'),
|
||
|
|
(5, 8): VF('FIVE EIGHTHS'),
|
||
|
|
(7, 8): VF('SEVEN EIGHTHS'),
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
# atom symbols
|
||
|
|
_xsym = {
|
||
|
|
'==': ('=', '='),
|
||
|
|
'<': ('<', '<'),
|
||
|
|
'>': ('>', '>'),
|
||
|
|
'<=': ('<=', U('LESS-THAN OR EQUAL TO')),
|
||
|
|
'>=': ('>=', U('GREATER-THAN OR EQUAL TO')),
|
||
|
|
'!=': ('!=', U('NOT EQUAL TO')),
|
||
|
|
':=': (':=', ':='),
|
||
|
|
'+=': ('+=', '+='),
|
||
|
|
'-=': ('-=', '-='),
|
||
|
|
'*=': ('*=', '*='),
|
||
|
|
'/=': ('/=', '/='),
|
||
|
|
'%=': ('%=', '%='),
|
||
|
|
'*': ('*', U('DOT OPERATOR')),
|
||
|
|
'-->': ('-->', U('EM DASH') + U('EM DASH') +
|
||
|
|
U('BLACK RIGHT-POINTING TRIANGLE') if U('EM DASH')
|
||
|
|
and U('BLACK RIGHT-POINTING TRIANGLE') else None),
|
||
|
|
'==>': ('==>', U('BOX DRAWINGS DOUBLE HORIZONTAL') +
|
||
|
|
U('BOX DRAWINGS DOUBLE HORIZONTAL') +
|
||
|
|
U('BLACK RIGHT-POINTING TRIANGLE') if
|
||
|
|
U('BOX DRAWINGS DOUBLE HORIZONTAL') and
|
||
|
|
U('BOX DRAWINGS DOUBLE HORIZONTAL') and
|
||
|
|
U('BLACK RIGHT-POINTING TRIANGLE') else None),
|
||
|
|
'.': ('*', U('RING OPERATOR')),
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
def xsym(sym):
|
||
|
|
"""get symbology for a 'character'"""
|
||
|
|
op = _xsym[sym]
|
||
|
|
|
||
|
|
if _use_unicode:
|
||
|
|
return op[1]
|
||
|
|
else:
|
||
|
|
return op[0]
|
||
|
|
|
||
|
|
|
||
|
|
# SYMBOLS
|
||
|
|
|
||
|
|
atoms_table = {
|
||
|
|
# class how-to-display
|
||
|
|
'Exp1': U('SCRIPT SMALL E'),
|
||
|
|
'Pi': U('GREEK SMALL LETTER PI'),
|
||
|
|
'Infinity': U('INFINITY'),
|
||
|
|
'NegativeInfinity': U('INFINITY') and ('-' + U('INFINITY')), # XXX what to do here
|
||
|
|
#'ImaginaryUnit': U('GREEK SMALL LETTER IOTA'),
|
||
|
|
#'ImaginaryUnit': U('MATHEMATICAL ITALIC SMALL I'),
|
||
|
|
'ImaginaryUnit': U('DOUBLE-STRUCK ITALIC SMALL I'),
|
||
|
|
'EmptySet': U('EMPTY SET'),
|
||
|
|
'Naturals': U('DOUBLE-STRUCK CAPITAL N'),
|
||
|
|
'Naturals0': (U('DOUBLE-STRUCK CAPITAL N') and
|
||
|
|
(U('DOUBLE-STRUCK CAPITAL N') +
|
||
|
|
U('SUBSCRIPT ZERO'))),
|
||
|
|
'Integers': U('DOUBLE-STRUCK CAPITAL Z'),
|
||
|
|
'Rationals': U('DOUBLE-STRUCK CAPITAL Q'),
|
||
|
|
'Reals': U('DOUBLE-STRUCK CAPITAL R'),
|
||
|
|
'Complexes': U('DOUBLE-STRUCK CAPITAL C'),
|
||
|
|
'Union': U('UNION'),
|
||
|
|
'SymmetricDifference': U('INCREMENT'),
|
||
|
|
'Intersection': U('INTERSECTION'),
|
||
|
|
'Ring': U('RING OPERATOR'),
|
||
|
|
'Modifier Letter Low Ring':U('Modifier Letter Low Ring'),
|
||
|
|
'EmptySequence': 'EmptySequence',
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
def pretty_atom(atom_name, default=None, printer=None):
|
||
|
|
"""return pretty representation of an atom"""
|
||
|
|
if _use_unicode:
|
||
|
|
if printer is not None and atom_name == 'ImaginaryUnit' and printer._settings['imaginary_unit'] == 'j':
|
||
|
|
return U('DOUBLE-STRUCK ITALIC SMALL J')
|
||
|
|
else:
|
||
|
|
return atoms_table[atom_name]
|
||
|
|
else:
|
||
|
|
if default is not None:
|
||
|
|
return default
|
||
|
|
|
||
|
|
raise KeyError('only unicode') # send it default printer
|
||
|
|
|
||
|
|
|
||
|
|
def pretty_symbol(symb_name, bold_name=False):
|
||
|
|
"""return pretty representation of a symbol"""
|
||
|
|
# let's split symb_name into symbol + index
|
||
|
|
# UC: beta1
|
||
|
|
# UC: f_beta
|
||
|
|
|
||
|
|
if not _use_unicode:
|
||
|
|
return symb_name
|
||
|
|
|
||
|
|
name, sups, subs = split_super_sub(symb_name)
|
||
|
|
|
||
|
|
def translate(s, bold_name) :
|
||
|
|
if bold_name:
|
||
|
|
gG = greek_bold_unicode.get(s)
|
||
|
|
else:
|
||
|
|
gG = greek_unicode.get(s)
|
||
|
|
if gG is not None:
|
||
|
|
return gG
|
||
|
|
for key in sorted(modifier_dict.keys(), key=lambda k:len(k), reverse=True) :
|
||
|
|
if s.lower().endswith(key) and len(s)>len(key):
|
||
|
|
return modifier_dict[key](translate(s[:-len(key)], bold_name))
|
||
|
|
if bold_name:
|
||
|
|
return ''.join([bold_unicode[c] for c in s])
|
||
|
|
return s
|
||
|
|
|
||
|
|
name = translate(name, bold_name)
|
||
|
|
|
||
|
|
# Let's prettify sups/subs. If it fails at one of them, pretty sups/subs are
|
||
|
|
# not used at all.
|
||
|
|
def pretty_list(l, mapping):
|
||
|
|
result = []
|
||
|
|
for s in l:
|
||
|
|
pretty = mapping.get(s)
|
||
|
|
if pretty is None:
|
||
|
|
try: # match by separate characters
|
||
|
|
pretty = ''.join([mapping[c] for c in s])
|
||
|
|
except (TypeError, KeyError):
|
||
|
|
return None
|
||
|
|
result.append(pretty)
|
||
|
|
return result
|
||
|
|
|
||
|
|
pretty_sups = pretty_list(sups, sup)
|
||
|
|
if pretty_sups is not None:
|
||
|
|
pretty_subs = pretty_list(subs, sub)
|
||
|
|
else:
|
||
|
|
pretty_subs = None
|
||
|
|
|
||
|
|
# glue the results into one string
|
||
|
|
if pretty_subs is None: # nice formatting of sups/subs did not work
|
||
|
|
if subs:
|
||
|
|
name += '_'+'_'.join([translate(s, bold_name) for s in subs])
|
||
|
|
if sups:
|
||
|
|
name += '__'+'__'.join([translate(s, bold_name) for s in sups])
|
||
|
|
return name
|
||
|
|
else:
|
||
|
|
sups_result = ' '.join(pretty_sups)
|
||
|
|
subs_result = ' '.join(pretty_subs)
|
||
|
|
|
||
|
|
return ''.join([name, sups_result, subs_result])
|
||
|
|
|
||
|
|
|
||
|
|
def annotated(letter):
|
||
|
|
"""
|
||
|
|
Return a stylised drawing of the letter ``letter``, together with
|
||
|
|
information on how to put annotations (super- and subscripts to the
|
||
|
|
left and to the right) on it.
|
||
|
|
|
||
|
|
See pretty.py functions _print_meijerg, _print_hyper on how to use this
|
||
|
|
information.
|
||
|
|
"""
|
||
|
|
ucode_pics = {
|
||
|
|
'F': (2, 0, 2, 0, '\N{BOX DRAWINGS LIGHT DOWN AND RIGHT}\N{BOX DRAWINGS LIGHT HORIZONTAL}\n'
|
||
|
|
'\N{BOX DRAWINGS LIGHT VERTICAL AND RIGHT}\N{BOX DRAWINGS LIGHT HORIZONTAL}\n'
|
||
|
|
'\N{BOX DRAWINGS LIGHT UP}'),
|
||
|
|
'G': (3, 0, 3, 1, '\N{BOX DRAWINGS LIGHT ARC DOWN AND RIGHT}\N{BOX DRAWINGS LIGHT HORIZONTAL}\N{BOX DRAWINGS LIGHT ARC DOWN AND LEFT}\n'
|
||
|
|
'\N{BOX DRAWINGS LIGHT VERTICAL}\N{BOX DRAWINGS LIGHT RIGHT}\N{BOX DRAWINGS LIGHT DOWN AND LEFT}\n'
|
||
|
|
'\N{BOX DRAWINGS LIGHT ARC UP AND RIGHT}\N{BOX DRAWINGS LIGHT HORIZONTAL}\N{BOX DRAWINGS LIGHT ARC UP AND LEFT}')
|
||
|
|
}
|
||
|
|
ascii_pics = {
|
||
|
|
'F': (3, 0, 3, 0, ' _\n|_\n|\n'),
|
||
|
|
'G': (3, 0, 3, 1, ' __\n/__\n\\_|')
|
||
|
|
}
|
||
|
|
|
||
|
|
if _use_unicode:
|
||
|
|
return ucode_pics[letter]
|
||
|
|
else:
|
||
|
|
return ascii_pics[letter]
|
||
|
|
|
||
|
|
_remove_combining = dict.fromkeys(list(range(ord('\N{COMBINING GRAVE ACCENT}'), ord('\N{COMBINING LATIN SMALL LETTER X}')))
|
||
|
|
+ list(range(ord('\N{COMBINING LEFT HARPOON ABOVE}'), ord('\N{COMBINING ASTERISK ABOVE}'))))
|
||
|
|
|
||
|
|
def is_combining(sym):
|
||
|
|
"""Check whether symbol is a unicode modifier. """
|
||
|
|
|
||
|
|
return ord(sym) in _remove_combining
|
||
|
|
|
||
|
|
|
||
|
|
def center_accent(string, accent):
|
||
|
|
"""
|
||
|
|
Returns a string with accent inserted on the middle character. Useful to
|
||
|
|
put combining accents on symbol names, including multi-character names.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
==========
|
||
|
|
|
||
|
|
string : string
|
||
|
|
The string to place the accent in.
|
||
|
|
accent : string
|
||
|
|
The combining accent to insert
|
||
|
|
|
||
|
|
References
|
||
|
|
==========
|
||
|
|
|
||
|
|
.. [1] https://en.wikipedia.org/wiki/Combining_character
|
||
|
|
.. [2] https://en.wikipedia.org/wiki/Combining_Diacritical_Marks
|
||
|
|
|
||
|
|
"""
|
||
|
|
|
||
|
|
# Accent is placed on the previous character, although it may not always look
|
||
|
|
# like that depending on console
|
||
|
|
midpoint = len(string) // 2 + 1
|
||
|
|
firstpart = string[:midpoint]
|
||
|
|
secondpart = string[midpoint:]
|
||
|
|
return firstpart + accent + secondpart
|
||
|
|
|
||
|
|
|
||
|
|
def line_width(line):
|
||
|
|
"""Unicode combining symbols (modifiers) are not ever displayed as
|
||
|
|
separate symbols and thus should not be counted
|
||
|
|
"""
|
||
|
|
return len(line.translate(_remove_combining))
|