compose(codepoints)
public
Compose decomposed characters to the composed form.
# File activesupport/lib/active_support/multibyte/unicode.rb, line 156
def compose(codepoints)
pos = 0
eoa = codepoints.length - 1
starter_pos = 0
starter_char = codepoints[0]
previous_combining_class = -1
while pos < eoa
pos += 1
lindex = starter_char - HANGUL_LBASE
# -- Hangul
if 0 <= lindex and lindex < HANGUL_LCOUNT
vindex = codepoints[starter_pos+1] - HANGUL_VBASE rescue vindex = -1
if 0 <= vindex and vindex < HANGUL_VCOUNT
tindex = codepoints[starter_pos+2] - HANGUL_TBASE rescue tindex = -1
if 0 <= tindex and tindex < HANGUL_TCOUNT
j = starter_pos + 2
eoa -= 2
else
tindex = 0
j = starter_pos + 1
eoa -= 1
end
codepoints[starter_pos..j] = (lindex * HANGUL_VCOUNT + vindex) * HANGUL_TCOUNT + tindex + HANGUL_SBASE
end
starter_pos += 1
starter_char = codepoints[starter_pos]
# -- Other characters
else
current_char = codepoints[pos]
current = database.codepoints[current_char]
if current.combining_class > previous_combining_class
if ref = database.composition_map[starter_char]
composition = ref[current_char]
else
composition = nil
end
unless composition.nil?
codepoints[starter_pos] = composition
starter_char = composition
codepoints.delete_at pos
eoa -= 1
pos -= 1
previous_combining_class = -1
else
previous_combining_class = current.combining_class
end
else
previous_combining_class = current.combining_class
end
if current.combining_class == 0
starter_pos = pos
starter_char = codepoints[pos]
end
end
end
codepoints
end
