%PDF-
%PDF-
Mini Shell
Mini Shell
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\e]+)*(?:\a|\e\\)/
WIDTH_SCANNER = /\G(?:(#{NON_PRINTING_START})|(#{NON_PRINTING_END})|(#{CSI_REGEXP})|(#{OSC_REGEXP})|(\X))/o
def self.escape_for_print(str)
str.chars.map! { |gr|
case gr
when -"\n"
gr
when -"\t"
-' '
else
EscapedPairs[gr.ord] || gr
end
}.join
end
require 'reline/unicode/east_asian_width'
HalfwidthDakutenHandakuten = /[\u{FF9E}\u{FF9F}]/
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 }
)(?!#{ HalfwidthDakutenHandakuten })
| (?<width_2_3>
(?: #{ EastAsianWidth::TYPE_H }
| #{ EastAsianWidth::TYPE_NA }
| #{ EastAsianWidth::TYPE_N })
#{ HalfwidthDakutenHandakuten }
)
| (?<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 � REPLACEMENT CHARACTER
when m[:width_2_1], m[:width_2_2], m[:width_2_3] 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 |non_printing_start, non_printing_end, csi, osc, gc|
case
when non_printing_start
in_zero_width = true
when non_printing_end
in_zero_width = false
when csi, osc
when gc
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, offset: 0)
lines = [String.new(encoding: encoding)]
height = 1
width = offset
rest = str.encode(Encoding::UTF_8)
in_zero_width = false
seq = String.new(encoding: encoding)
rest.scan(WIDTH_SCANNER) do |non_printing_start, non_printing_end, csi, osc, gc|
case
when non_printing_start
in_zero_width = true
lines.last << NON_PRINTING_START
when non_printing_end
in_zero_width = false
lines.last << NON_PRINTING_END
when csi
lines.last << csi
unless in_zero_width
if csi == -"\e[m" || csi == -"\e[0m"
seq.clear
else
seq << csi
end
end
when osc
lines.last << osc
seq << osc
when gc
unless in_zero_width
mbchar_width = get_mbchar_width(gc)
if (width += mbchar_width) > max_width
width = mbchar_width
lines << nil
lines << seq.dup
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)
take_mbchar_range(str, start_col, max_width).first
end
def self.take_mbchar_range(str, start_col, width, cover_begin: false, cover_end: false, padding: false)
chunk = String.new(encoding: str.encoding)
end_col = start_col + width
total_width = 0
rest = str.encode(Encoding::UTF_8)
in_zero_width = false
chunk_start_col = nil
chunk_end_col = nil
has_csi = false
rest.scan(WIDTH_SCANNER) do |non_printing_start, non_printing_end, csi, osc, gc|
case
when non_printing_start
in_zero_width = true
chunk << NON_PRINTING_START
when non_printing_end
in_zero_width = false
chunk << NON_PRINTING_END
when csi
has_csi = true
chunk << csi
when osc
chunk << osc
when gc
if in_zero_width
chunk << gc
next
end
mbchar_width = get_mbchar_width(gc)
prev_width = total_width
total_width += mbchar_width
if (cover_begin || padding ? total_width <= start_col : prev_width < start_col)
# Current character haven't reached start_col yet
next
elsif padding && !cover_begin && prev_width < start_col && start_col < total_width
# Add preceding padding. This padding might have background color.
chunk << ' '
chunk_start_col ||= start_col
chunk_end_col = total_width
next
elsif (cover_end ? prev_width < end_col : total_width <= end_col)
# Current character is in the range
chunk << gc
chunk_start_col ||= prev_width
chunk_end_col = total_width
break if total_width >= end_col
else
# Current character exceeds end_col
if padding && end_col < total_width
# Add succeeding padding. This padding might have background color.
chunk << ' '
chunk_start_col ||= prev_width
chunk_end_col = end_col
end
break
end
end
end
chunk_start_col ||= start_col
chunk_end_col ||= start_col
if padding && chunk_end_col < end_col
# Append padding. This padding should not include background color.
chunk << "\e[0m" if has_csi
chunk << ' ' * (end_col - chunk_end_col)
chunk_end_col = end_col
end
[chunk, chunk_start_col, chunk_end_col - chunk_start_col]
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
Zerion Mini Shell 1.0