#!/bin/bash

# For bold and italic we can use the Mathematical font variant mappings,
#  although those are only defined for Latin and Greek.
# Latin bold capital: u1d400 - u1d419
# Latin bold small: u1d41a - u1d433
# Latin italic capital: u1d434 - u1d44d
# Latin italic small: u1d44e - u1d467
# Latin bold italic capital: u1d468 - u1d481
# Latin bold italic small: u1d482 - u1d49b
# (Script capital, script small, bold script capital, bold script small)
# (Fraktur capital, fraktur small)
# (Double-struck capital, double-struck small)
# (some Hebrew symbol variants)
# (Bold fraktur capital, bold fraktur small)
# (Sans-serif capital, sans-serif small)
# (Sans-serif bold capital, sans-serif bold small)
# (Sans-serif italic capital, sans-serif italic small)
# (Sans-serif bold italic capital, sans-serif bold italic small)
# (Monospace capital, monospace small)
# Greek bold capital: u1d6a8 - u1d6c0
# Greek bold small: u1d6c2 - u1d6da
# Greek italic capital: u1d6e2 - u1d6fa
# Greek italic small: u1dcfc - u1d714
# Greek bold italic capital: u1d71c - u1d734
# Greek bold italic small: u1d736 - u1d74e
# (Greek sans-serif bold capital: u1d756 - u1d76e)
# (Greek sans-serif bold small: u1d770 - u1d788)
# (Greek sans-serif bold italic capital: u1d790 - u1d7a8)
# (Greek sans-serif bold italic small: u1d7aa - u1d7c2)
# bold digits: u1d7ce - u1d7d7
# (double-struck digits)
# (sans-serif digits)
# (sans-serif bold digits)
# (monospace digits)
# (Arabic mathematical)
# (Arabic stretched)
# (Arabic looped)
# (Arabic double-struck)
#
# It turns out there are no Unicode control codes for marking text
#  bold or italic.  There are for subscript and superscript,
#  and ASCII has similar codes which nobody ever uses.

declare -A bold=(
	[A]=$'\xf0\x9d\x90\x80'
	[B]=$'\xf0\x9d\x90\x81'
	[C]=$'\xf0\x9d\x90\x82'
	[D]=$'\xf0\x9d\x90\x83'
	[E]=$'\xf0\x9d\x90\x84'
	[F]=$'\xf0\x9d\x90\x85'
	[G]=$'\xf0\x9d\x90\x86'
	[H]=$'\xf0\x9d\x90\x87'
	[I]=$'\xf0\x9d\x90\x88'
	[J]=$'\xf0\x9d\x90\x89'
	[K]=$'\xf0\x9d\x90\x8a'
	[L]=$'\xf0\x9d\x90\x8b'
	[M]=$'\xf0\x9d\x90\x8c'
	[N]=$'\xf0\x9d\x90\x8d'
	[O]=$'\xf0\x9d\x90\x8e'
	[P]=$'\xf0\x9d\x90\x8f'
	[Q]=$'\xf0\x9d\x90\x90'
	[R]=$'\xf0\x9d\x90\x91'
	[S]=$'\xf0\x9d\x90\x92'
	[T]=$'\xf0\x9d\x90\x93'
	[U]=$'\xf0\x9d\x90\x94'
	[V]=$'\xf0\x9d\x90\x95'
	[W]=$'\xf0\x9d\x90\x96'
	[X]=$'\xf0\x9d\x90\x97'
	[Y]=$'\xf0\x9d\x90\x98'
	[Z]=$'\xf0\x9d\x90\x99'
	[a]=$'\xf0\x9d\x90\x9a'
	[b]=$'\xf0\x9d\x90\x9b'
	[c]=$'\xf0\x9d\x90\x9c'
	[d]=$'\xf0\x9d\x90\x9d'
	[e]=$'\xf0\x9d\x90\x9e'
	[f]=$'\xf0\x9d\x90\x9f'
	[g]=$'\xf0\x9d\x90\xa0'
	[h]=$'\xf0\x9d\x90\xa1'
	[i]=$'\xf0\x9d\x90\xa2'
	[j]=$'\xf0\x9d\x90\xa3'
	[k]=$'\xf0\x9d\x90\xa4'
	[l]=$'\xf0\x9d\x90\xa5'
	[m]=$'\xf0\x9d\x90\xa6'
	[n]=$'\xf0\x9d\x90\xa7'
	[o]=$'\xf0\x9d\x90\xa8'
	[p]=$'\xf0\x9d\x90\xa9'
	[q]=$'\xf0\x9d\x90\xaa'
	[r]=$'\xf0\x9d\x90\xab'
	[s]=$'\xf0\x9d\x90\xac'
	[t]=$'\xf0\x9d\x90\xad'
	[u]=$'\xf0\x9d\x90\xae'
	[v]=$'\xf0\x9d\x90\xaf'
	[w]=$'\xf0\x9d\x90\xb0'
	[x]=$'\xf0\x9d\x90\xb1'
	[y]=$'\xf0\x9d\x90\xb2'
	[z]=$'\xf0\x9d\x90\xb3'
	[Α]=$'\xf0\x9d\x9a\xa8'
	[Β]=$'\xf0\x9d\x9a\xa9'
	[Γ]=$'\xf0\x9d\x9a\xaa'
	[Δ]=$'\xf0\x9d\x9a\xab'
	[Ε]=$'\xf0\x9d\x9a\xac'
	[Ζ]=$'\xf0\x9d\x9a\xad'
	[Η]=$'\xf0\x9d\x9a\xae'
	[Θ]=$'\xf0\x9d\x9a\xaf'
	[Ι]=$'\xf0\x9d\x9a\xb0'
	[Κ]=$'\xf0\x9d\x9a\xb1'
	[Λ]=$'\xf0\x9d\x9a\xb2'
	[Μ]=$'\xf0\x9d\x9a\xb3'
	[Ν]=$'\xf0\x9d\x9a\xb4'
	[Ξ]=$'\xf0\x9d\x9a\xb5'
	[Ο]=$'\xf0\x9d\x9a\xb6'
	[Π]=$'\xf0\x9d\x9a\xb7'
	[Ρ]=$'\xf0\x9d\x9a\xb8'
	[Σ]=$'\xf0\x9d\x9a\xba'
	[Τ]=$'\xf0\x9d\x9a\xbb'
	[Υ]=$'\xf0\x9d\x9a\xbc'
	[Φ]=$'\xf0\x9d\x9a\xbd'
	[Χ]=$'\xf0\x9d\x9a\xbe'
	[Ψ]=$'\xf0\x9d\x9a\xbf'
	[Ω]=$'\xf0\x9d\x9b\x80'
	[α]=$'\xf0\x9d\x9b\x82'
	[β]=$'\xf0\x9d\x9b\x83'
	[γ]=$'\xf0\x9d\x9b\x84'
	[δ]=$'\xf0\x9d\x9b\x85'
	[ε]=$'\xf0\x9d\x9b\x86'
	[ζ]=$'\xf0\x9d\x9b\x87'
	[η]=$'\xf0\x9d\x9b\x88'
	[θ]=$'\xf0\x9d\x9b\x89'
	[ι]=$'\xf0\x9d\x9b\x8a'
	[κ]=$'\xf0\x9d\x9b\x8b'
	[λ]=$'\xf0\x9d\x9b\x8c'
	[μ]=$'\xf0\x9d\x9b\x8d'
	[ν]=$'\xf0\x9d\x9b\x8e'
	[ξ]=$'\xf0\x9d\x9b\x8f'
	[ο]=$'\xf0\x9d\x9b\x90'
	[π]=$'\xf0\x9d\x9b\x91'
	[ρ]=$'\xf0\x9d\x9b\x92'
	[ς]=$'\xf0\x9d\x9b\x93'
	[σ]=$'\xf0\x9d\x9b\x94'
	[τ]=$'\xf0\x9d\x9b\x95'
	[υ]=$'\xf0\x9d\x9b\x96'
	[φ]=$'\xf0\x9d\x9b\x97'
	[χ]=$'\xf0\x9d\x9b\x98'
	[ψ]=$'\xf0\x9d\x9b\x99'
	[ω]=$'\xf0\x9d\x9b\x9a'
)

declare -A italic=(
	[A]=$'\xf0\x9d\x90\xb4'
	[B]=$'\xf0\x9d\x90\xb5'
	[C]=$'\xf0\x9d\x90\xb6'
	[D]=$'\xf0\x9d\x90\xb7'
	[E]=$'\xf0\x9d\x90\xb8'
	[F]=$'\xf0\x9d\x90\xb9'
	[G]=$'\xf0\x9d\x90\xba'
	[H]=$'\xf0\x9d\x90\xbb'
	[I]=$'\xf0\x9d\x90\xbc'
	[J]=$'\xf0\x9d\x90\xbd'
	[K]=$'\xf0\x9d\x90\xbe'
	[L]=$'\xf0\x9d\x90\xbf'
	[M]=$'\xf0\x9d\x91\x80'
	[N]=$'\xf0\x9d\x91\x81'
	[O]=$'\xf0\x9d\x91\x82'
	[P]=$'\xf0\x9d\x91\x83'
	[Q]=$'\xf0\x9d\x91\x84'
	[R]=$'\xf0\x9d\x91\x85'
	[S]=$'\xf0\x9d\x91\x86'
	[T]=$'\xf0\x9d\x91\x87'
	[U]=$'\xf0\x9d\x91\x88'
	[V]=$'\xf0\x9d\x91\x89'
	[W]=$'\xf0\x9d\x91\x8a'
	[X]=$'\xf0\x9d\x91\x8b'
	[Y]=$'\xf0\x9d\x91\x8c'
	[Z]=$'\xf0\x9d\x91\x8d'
	[a]=$'\xf0\x9d\x91\x8e'
	[b]=$'\xf0\x9d\x91\x8f'
	[c]=$'\xf0\x9d\x91\x90'
	[d]=$'\xf0\x9d\x91\x91'
	[e]=$'\xf0\x9d\x91\x92'
	[f]=$'\xf0\x9d\x91\x93'
	[g]=$'\xf0\x9d\x91\x94'
	[h]=$'\xf0\x9d\x98\xa9' # Sans-serif, because f0 9d 91 95 is not assigned.
	[i]=$'\xf0\x9d\x91\x96'
	[j]=$'\xf0\x9d\x91\x97'
	[k]=$'\xf0\x9d\x91\x98'
	[l]=$'\xf0\x9d\x91\x99'
	[m]=$'\xf0\x9d\x91\x9a'
	[n]=$'\xf0\x9d\x91\x9b'
	[o]=$'\xf0\x9d\x91\x9c'
	[p]=$'\xf0\x9d\x91\x9d'
	[q]=$'\xf0\x9d\x91\x9e'
	[r]=$'\xf0\x9d\x91\x9f'
	[s]=$'\xf0\x9d\x91\xa0'
	[t]=$'\xf0\x9d\x91\xa1'
	[u]=$'\xf0\x9d\x91\xa2'
	[v]=$'\xf0\x9d\x91\xa3'
	[w]=$'\xf0\x9d\x91\xa4'
	[x]=$'\xf0\x9d\x91\xa5'
	[y]=$'\xf0\x9d\x91\xa6'
	[z]=$'\xf0\x9d\x91\xa7'
	[Α]=$'\xf0\x9d\x9b\xa2'
	[Β]=$'\xf0\x9d\x9b\xa3'
	[Γ]=$'\xf0\x9d\x9b\xa4'
	[Δ]=$'\xf0\x9d\x9b\xa5'
	[Ε]=$'\xf0\x9d\x9b\xa6'
	[Ζ]=$'\xf0\x9d\x9b\xa7'
	[Η]=$'\xf0\x9d\x9b\xa8'
	[Θ]=$'\xf0\x9d\x9b\xa9'
	[Ι]=$'\xf0\x9d\x9b\xaa'
	[Κ]=$'\xf0\x9d\x9b\xab'
	[Λ]=$'\xf0\x9d\x9b\xac'
	[Μ]=$'\xf0\x9d\x9b\xad'
	[Ν]=$'\xf0\x9d\x9b\xae'
	[Ξ]=$'\xf0\x9d\x9b\xaf'
	[Ο]=$'\xf0\x9d\x9b\xb0'
	[Π]=$'\xf0\x9d\x9b\xb1'
	[Ρ]=$'\xf0\x9d\x9b\xb2'
	[Σ]=$'\xf0\x9d\x9b\xb4'
	[Τ]=$'\xf0\x9d\x9b\xb5'
	[Υ]=$'\xf0\x9d\x9b\xb6'
	[Φ]=$'\xf0\x9d\x9b\xb7'
	[Χ]=$'\xf0\x9d\x9b\xb8'
	[Ψ]=$'\xf0\x9d\x9b\xb9'
	[Ω]=$'\xf0\x9d\x9b\xba'
	[α]=$'\xf0\x9d\x9b\xbc'
	[β]=$'\xf0\x9d\x9b\xbd'
	[γ]=$'\xf0\x9d\x9b\xbe'
	[δ]=$'\xf0\x9d\x9b\xbf'
	[ε]=$'\xf0\x9d\x9c\x80'
	[ζ]=$'\xf0\x9d\x9c\x81'
	[η]=$'\xf0\x9d\x9c\x82'
	[θ]=$'\xf0\x9d\x9c\x83'
	[ι]=$'\xf0\x9d\x9c\x84'
	[κ]=$'\xf0\x9d\x9c\x85'
	[λ]=$'\xf0\x9d\x9c\x86'
	[μ]=$'\xf0\x9d\x9c\x87'
	[ν]=$'\xf0\x9d\x9c\x88'
	[ξ]=$'\xf0\x9d\x9c\x89'
	[ο]=$'\xf0\x9d\x9c\x8a'
	[π]=$'\xf0\x9d\x9c\x8b'
	[ρ]=$'\xf0\x9d\x9c\x8c'
	[ς]=$'\xf0\x9d\x9c\x8d'
	[σ]=$'\xf0\x9d\x9c\x8e'
	[τ]=$'\xf0\x9d\x9c\x8f'
	[υ]=$'\xf0\x9d\x9c\x90'
	[φ]=$'\xf0\x9d\x9c\x91'
	[χ]=$'\xf0\x9d\x9c\x92'
	[ψ]=$'\xf0\x9d\x9c\x93'
	[ω]=$'\xf0\x9d\x9c\x94'
)

# TODO: bold italics.

while IFS= read -r line
do for i in $(seq 0 $((${#line}-1)))
	do
		c1=${line:$i:1}
		if [[ $c1 =~ [a-zA-Zα-ωΑ-Ω] ]]
		then replacement+=${bold[$c1]}
		else replacement+=$'\u0331'$c1
		fi
	done
	echo "$replacement"
done