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ruby--ruby/lib/reline/unicode.rb

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class Reline::Unicode
EscapedPairs = {
0x00 => '^@',
0x01 => '^A', # C-a
0x02 => '^B',
0x03 => '^C',
0x04 => '^D',
0x05 => '^E',
0x06 => '^F',
0x07 => '^G',
0x08 => '^H', # Backspace
0x09 => '^I',
0x0A => '^J',
0x0B => '^K',
0x0C => '^L',
0x0D => '^M', # Enter
0x0E => '^N',
0x0F => '^O',
0x10 => '^P',
0x11 => '^Q',
0x12 => '^R',
0x13 => '^S',
0x14 => '^T',
0x15 => '^U',
0x16 => '^V',
0x17 => '^W',
0x18 => '^X',
0x19 => '^Y',
0x1A => '^Z', # C-z
0x1B => '^[', # C-[ C-3
0x1D => '^]', # C-]
0x1E => '^^', # C-~ C-6
0x1F => '^_', # C-_ C-7
0x7F => '^?', # C-? C-8
}
EscapedChars = EscapedPairs.keys.map(&:chr)
NON_PRINTING_START = "\1"
NON_PRINTING_END = "\2"
CSI_REGEXP = /\e\[[\d;]*[ABCDEFGHJKSTfminsuhl]/
OSC_REGEXP = /\e\]\d+(?:;[^;]+)*\a/
WIDTH_SCANNER = /\G(?:(#{NON_PRINTING_START})|(#{NON_PRINTING_END})|(#{CSI_REGEXP})|(#{OSC_REGEXP})|(\X))/o
NON_PRINTING_START_INDEX = 0
NON_PRINTING_END_INDEX = 1
CSI_REGEXP_INDEX = 2
OSC_REGEXP_INDEX = 3
GRAPHEME_CLUSTER_INDEX = 4
def self.get_mbchar_byte_size_by_first_char(c)
# Checks UTF-8 character byte size
case c.ord
# 0b0xxxxxxx
when ->(code) { (code ^ 0b10000000).allbits?(0b10000000) } then 1
# 0b110xxxxx
when ->(code) { (code ^ 0b00100000).allbits?(0b11100000) } then 2
# 0b1110xxxx
when ->(code) { (code ^ 0b00010000).allbits?(0b11110000) } then 3
# 0b11110xxx
when ->(code) { (code ^ 0b00001000).allbits?(0b11111000) } then 4
# 0b111110xx
when ->(code) { (code ^ 0b00000100).allbits?(0b11111100) } then 5
# 0b1111110x
when ->(code) { (code ^ 0b00000010).allbits?(0b11111110) } then 6
# successor of mbchar
else 0
end
end
def self.escape_for_print(str)
str.chars.map! { |gr|
escaped = EscapedPairs[gr.ord]
if escaped && gr != -"\n" && gr != -"\t"
escaped
else
gr
end
}.join
end
require 'reline/unicode/east_asian_width'
MBCharWidthRE = /
(?<width_2_1>
[#{ EscapedChars.map {|c| "\\x%02x" % c.ord }.join }] (?# ^ + char, such as ^M, ^H, ^[, ...)
)
| (?<width_3>^\u{2E3B}) (?# THREE-EM DASH)
| (?<width_0>^\p{M})
| (?<width_2_2>
#{ EastAsianWidth::TYPE_F }
| #{ EastAsianWidth::TYPE_W }
)
| (?<width_1>
#{ EastAsianWidth::TYPE_H }
| #{ EastAsianWidth::TYPE_NA }
| #{ EastAsianWidth::TYPE_N }
)
| (?<ambiguous_width>
#{EastAsianWidth::TYPE_A}
)
/x
def self.get_mbchar_width(mbchar)
ord = mbchar.ord
if (0x00 <= ord and ord <= 0x1F) # in EscapedPairs
return 2
elsif (0x20 <= ord and ord <= 0x7E) # printable ASCII chars
return 1
end
m = mbchar.encode(Encoding::UTF_8).match(MBCharWidthRE)
case
when m.nil? then 1 # TODO should be U+FFFD <20> REPLACEMENT CHARACTER
when m[:width_2_1], m[:width_2_2] then 2
when m[:width_3] then 3
when m[:width_0] then 0
when m[:width_1] then 1
when m[:ambiguous_width] then Reline.ambiguous_width
else
nil
end
end
def self.calculate_width(str, allow_escape_code = false)
if allow_escape_code
width = 0
rest = str.encode(Encoding::UTF_8)
in_zero_width = false
rest.scan(WIDTH_SCANNER) do |gc|
case
when gc[NON_PRINTING_START_INDEX]
in_zero_width = true
when gc[NON_PRINTING_END_INDEX]
in_zero_width = false
when gc[CSI_REGEXP_INDEX], gc[OSC_REGEXP_INDEX]
when gc[GRAPHEME_CLUSTER_INDEX]
gc = gc[GRAPHEME_CLUSTER_INDEX]
unless in_zero_width
width += get_mbchar_width(gc)
end
end
end
width
else
str.encode(Encoding::UTF_8).grapheme_clusters.inject(0) { |w, gc|
w + get_mbchar_width(gc)
}
end
end
def self.split_by_width(str, max_width, encoding = str.encoding)
lines = [String.new(encoding: encoding)]
height = 1
width = 0
rest = str.encode(Encoding::UTF_8)
in_zero_width = false
rest.scan(WIDTH_SCANNER) do |gc|
case
when gc[NON_PRINTING_START_INDEX]
in_zero_width = true
when gc[NON_PRINTING_END_INDEX]
in_zero_width = false
when gc[CSI_REGEXP_INDEX]
lines.last << gc[CSI_REGEXP_INDEX]
when gc[OSC_REGEXP_INDEX]
lines.last << gc[OSC_REGEXP_INDEX]
when gc[GRAPHEME_CLUSTER_INDEX]
gc = gc[GRAPHEME_CLUSTER_INDEX]
unless in_zero_width
mbchar_width = get_mbchar_width(gc)
if (width += mbchar_width) > max_width
width = mbchar_width
lines << nil
lines << String.new(encoding: encoding)
height += 1
end
end
lines.last << gc
end
end
# The cursor moves to next line in first
if width == max_width
lines << nil
lines << String.new(encoding: encoding)
height += 1
end
[lines, height]
end
# Take a chunk of a String cut by width with escape sequences.
def self.take_range(str, start_col, max_width, encoding = str.encoding)
chunk = String.new(encoding: encoding)
total_width = 0
rest = str.encode(Encoding::UTF_8)
in_zero_width = false
rest.scan(WIDTH_SCANNER) do |gc|
case
when gc[NON_PRINTING_START_INDEX]
in_zero_width = true
when gc[NON_PRINTING_END_INDEX]
in_zero_width = false
when gc[CSI_REGEXP_INDEX]
chunk << gc[CSI_REGEXP_INDEX]
when gc[OSC_REGEXP_INDEX]
chunk << gc[OSC_REGEXP_INDEX]
when gc[GRAPHEME_CLUSTER_INDEX]
gc = gc[GRAPHEME_CLUSTER_INDEX]
if in_zero_width
chunk << gc
else
mbchar_width = get_mbchar_width(gc)
total_width += mbchar_width
break if (start_col + max_width) < total_width
chunk << gc if start_col < total_width
end
end
end
chunk
end
def self.get_next_mbchar_size(line, byte_pointer)
grapheme = line.byteslice(byte_pointer..-1).grapheme_clusters.first
grapheme ? grapheme.bytesize : 0
end
def self.get_prev_mbchar_size(line, byte_pointer)
if byte_pointer.zero?
0
else
grapheme = line.byteslice(0..(byte_pointer - 1)).grapheme_clusters.last
grapheme ? grapheme.bytesize : 0
end
end
def self.em_forward_word(line, byte_pointer)
width = 0
byte_size = 0
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\p{Word}/
width += get_mbchar_width(mbchar)
byte_size += size
end
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\P{Word}/
width += get_mbchar_width(mbchar)
byte_size += size
end
[byte_size, width]
end
def self.em_forward_word_with_capitalization(line, byte_pointer)
width = 0
byte_size = 0
new_str = String.new
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\p{Word}/
new_str += mbchar
width += get_mbchar_width(mbchar)
byte_size += size
end
first = true
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\P{Word}/
if first
new_str += mbchar.upcase
first = false
else
new_str += mbchar.downcase
end
width += get_mbchar_width(mbchar)
byte_size += size
end
[byte_size, width, new_str]
end
def self.em_backward_word(line, byte_pointer)
width = 0
byte_size = 0
while 0 < (byte_pointer - byte_size)
size = get_prev_mbchar_size(line, byte_pointer - byte_size)
mbchar = line.byteslice(byte_pointer - byte_size - size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\p{Word}/
width += get_mbchar_width(mbchar)
byte_size += size
end
while 0 < (byte_pointer - byte_size)
size = get_prev_mbchar_size(line, byte_pointer - byte_size)
mbchar = line.byteslice(byte_pointer - byte_size - size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\P{Word}/
width += get_mbchar_width(mbchar)
byte_size += size
end
[byte_size, width]
end
def self.em_big_backward_word(line, byte_pointer)
width = 0
byte_size = 0
while 0 < (byte_pointer - byte_size)
size = get_prev_mbchar_size(line, byte_pointer - byte_size)
mbchar = line.byteslice(byte_pointer - byte_size - size, size)
break if mbchar =~ /\S/
width += get_mbchar_width(mbchar)
byte_size += size
end
while 0 < (byte_pointer - byte_size)
size = get_prev_mbchar_size(line, byte_pointer - byte_size)
mbchar = line.byteslice(byte_pointer - byte_size - size, size)
break if mbchar =~ /\s/
width += get_mbchar_width(mbchar)
byte_size += size
end
[byte_size, width]
end
def self.ed_transpose_words(line, byte_pointer)
right_word_start = nil
size = get_next_mbchar_size(line, byte_pointer)
mbchar = line.byteslice(byte_pointer, size)
if size.zero?
# ' aaa bbb [cursor]'
byte_size = 0
while 0 < (byte_pointer + byte_size)
size = get_prev_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size - size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\p{Word}/
byte_size -= size
end
while 0 < (byte_pointer + byte_size)
size = get_prev_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size - size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\P{Word}/
byte_size -= size
end
right_word_start = byte_pointer + byte_size
byte_size = 0
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\P{Word}/
byte_size += size
end
after_start = byte_pointer + byte_size
elsif mbchar.encode(Encoding::UTF_8) =~ /\p{Word}/
# ' aaa bb[cursor]b'
byte_size = 0
while 0 < (byte_pointer + byte_size)
size = get_prev_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size - size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\P{Word}/
byte_size -= size
end
right_word_start = byte_pointer + byte_size
byte_size = 0
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\P{Word}/
byte_size += size
end
after_start = byte_pointer + byte_size
else
byte_size = 0
while (line.bytesize - 1) > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\p{Word}/
byte_size += size
end
if (byte_pointer + byte_size) == (line.bytesize - 1)
# ' aaa bbb [cursor] '
after_start = line.bytesize
while 0 < (byte_pointer + byte_size)
size = get_prev_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size - size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\p{Word}/
byte_size -= size
end
while 0 < (byte_pointer + byte_size)
size = get_prev_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size - size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\P{Word}/
byte_size -= size
end
right_word_start = byte_pointer + byte_size
else
# ' aaa [cursor] bbb '
right_word_start = byte_pointer + byte_size
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\P{Word}/
byte_size += size
end
after_start = byte_pointer + byte_size
end
end
byte_size = right_word_start - byte_pointer
while 0 < (byte_pointer + byte_size)
size = get_prev_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size - size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\p{Word}/
byte_size -= size
end
middle_start = byte_pointer + byte_size
byte_size = middle_start - byte_pointer
while 0 < (byte_pointer + byte_size)
size = get_prev_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size - size, size)
break if mbchar.encode(Encoding::UTF_8) =~ /\P{Word}/
byte_size -= size
end
left_word_start = byte_pointer + byte_size
[left_word_start, middle_start, right_word_start, after_start]
end
def self.vi_big_forward_word(line, byte_pointer)
width = 0
byte_size = 0
while (line.bytesize - 1) > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar =~ /\s/
width += get_mbchar_width(mbchar)
byte_size += size
end
while (line.bytesize - 1) > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar =~ /\S/
width += get_mbchar_width(mbchar)
byte_size += size
end
[byte_size, width]
end
def self.vi_big_forward_end_word(line, byte_pointer)
if (line.bytesize - 1) > byte_pointer
size = get_next_mbchar_size(line, byte_pointer)
mbchar = line.byteslice(byte_pointer, size)
width = get_mbchar_width(mbchar)
byte_size = size
else
return [0, 0]
end
while (line.bytesize - 1) > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar =~ /\S/
width += get_mbchar_width(mbchar)
byte_size += size
end
prev_width = width
prev_byte_size = byte_size
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar =~ /\s/
prev_width = width
prev_byte_size = byte_size
width += get_mbchar_width(mbchar)
byte_size += size
end
[prev_byte_size, prev_width]
end
def self.vi_big_backward_word(line, byte_pointer)
width = 0
byte_size = 0
while 0 < (byte_pointer - byte_size)
size = get_prev_mbchar_size(line, byte_pointer - byte_size)
mbchar = line.byteslice(byte_pointer - byte_size - size, size)
break if mbchar =~ /\S/
width += get_mbchar_width(mbchar)
byte_size += size
end
while 0 < (byte_pointer - byte_size)
size = get_prev_mbchar_size(line, byte_pointer - byte_size)
mbchar = line.byteslice(byte_pointer - byte_size - size, size)
break if mbchar =~ /\s/
width += get_mbchar_width(mbchar)
byte_size += size
end
[byte_size, width]
end
def self.vi_forward_word(line, byte_pointer, drop_terminate_spaces = false)
if line.bytesize > byte_pointer
size = get_next_mbchar_size(line, byte_pointer)
mbchar = line.byteslice(byte_pointer, size)
if mbchar =~ /\w/
started_by = :word
elsif mbchar =~ /\s/
started_by = :space
else
started_by = :non_word_printable
end
width = get_mbchar_width(mbchar)
byte_size = size
else
return [0, 0]
end
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
case started_by
when :word
break if mbchar =~ /\W/
when :space
break if mbchar =~ /\S/
when :non_word_printable
break if mbchar =~ /\w|\s/
end
width += get_mbchar_width(mbchar)
byte_size += size
end
return [byte_size, width] if drop_terminate_spaces
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
break if mbchar =~ /\S/
width += get_mbchar_width(mbchar)
byte_size += size
end
[byte_size, width]
end
def self.vi_forward_end_word(line, byte_pointer)
if (line.bytesize - 1) > byte_pointer
size = get_next_mbchar_size(line, byte_pointer)
mbchar = line.byteslice(byte_pointer, size)
if mbchar =~ /\w/
started_by = :word
elsif mbchar =~ /\s/
started_by = :space
else
started_by = :non_word_printable
end
width = get_mbchar_width(mbchar)
byte_size = size
else
return [0, 0]
end
if (line.bytesize - 1) > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
if mbchar =~ /\w/
second = :word
elsif mbchar =~ /\s/
second = :space
else
second = :non_word_printable
end
second_width = get_mbchar_width(mbchar)
second_byte_size = size
else
return [byte_size, width]
end
if second == :space
width += second_width
byte_size += second_byte_size
while (line.bytesize - 1) > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
if mbchar =~ /\S/
if mbchar =~ /\w/
started_by = :word
else
started_by = :non_word_printable
end
break
end
width += get_mbchar_width(mbchar)
byte_size += size
end
else
case [started_by, second]
when [:word, :non_word_printable], [:non_word_printable, :word]
started_by = second
else
width += second_width
byte_size += second_byte_size
started_by = second
end
end
prev_width = width
prev_byte_size = byte_size
while line.bytesize > (byte_pointer + byte_size)
size = get_next_mbchar_size(line, byte_pointer + byte_size)
mbchar = line.byteslice(byte_pointer + byte_size, size)
case started_by
when :word
break if mbchar =~ /\W/
when :non_word_printable
break if mbchar =~ /[\w\s]/
end
prev_width = width
prev_byte_size = byte_size
width += get_mbchar_width(mbchar)
byte_size += size
end
[prev_byte_size, prev_width]
end
def self.vi_backward_word(line, byte_pointer)
width = 0
byte_size = 0
while 0 < (byte_pointer - byte_size)
size = get_prev_mbchar_size(line, byte_pointer - byte_size)
mbchar = line.byteslice(byte_pointer - byte_size - size, size)
if mbchar =~ /\S/
if mbchar =~ /\w/
started_by = :word
else
started_by = :non_word_printable
end
break
end
width += get_mbchar_width(mbchar)
byte_size += size
end
while 0 < (byte_pointer - byte_size)
size = get_prev_mbchar_size(line, byte_pointer - byte_size)
mbchar = line.byteslice(byte_pointer - byte_size - size, size)
case started_by
when :word
break if mbchar =~ /\W/
when :non_word_printable
break if mbchar =~ /[\w\s]/
end
width += get_mbchar_width(mbchar)
byte_size += size
end
[byte_size, width]
end
def self.vi_first_print(line)
width = 0
byte_size = 0
while (line.bytesize - 1) > byte_size
size = get_next_mbchar_size(line, byte_size)
mbchar = line.byteslice(byte_size, size)
if mbchar =~ /\S/
break
end
width += get_mbchar_width(mbchar)
byte_size += size
end
[byte_size, width]
end
end
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