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|
class Reline::KeyStroke
ESC_BYTE = 27
CSI_PARAMETER_BYTES_RANGE = 0x30..0x3f
CSI_INTERMEDIATE_BYTES_RANGE = (0x20..0x2f)
def initialize(config)
@config = config
end
def compress_meta_key(ary)
return ary unless @config.convert_meta
ary.inject([]) { |result, key|
if result.size > 0 and result.last == "\e".ord
result[result.size - 1] = Reline::Key.new(key, key | 0b10000000, true)
else
result << key
end
result
}
end
def start_with?(me, other)
compressed_me = compress_meta_key(me)
compressed_other = compress_meta_key(other)
i = 0
loop do
my_c = compressed_me[i]
other_c = compressed_other[i]
other_is_last = (i + 1) == compressed_other.size
me_is_last = (i + 1) == compressed_me.size
if my_c != other_c
if other_c == "\e".ord and other_is_last and my_c.is_a?(Reline::Key) and my_c.with_meta
return true
else
return false
end
elsif other_is_last
return true
elsif me_is_last
return false
end
i += 1
end
end
def equal?(me, other)
case me
when Array
compressed_me = compress_meta_key(me)
compressed_other = compress_meta_key(other)
compressed_me.size == compressed_other.size and [compressed_me, compressed_other].transpose.all?{ |i| equal?(i[0], i[1]) }
when Integer
if other.is_a?(Reline::Key)
if other.combined_char == "\e".ord
false
else
other.combined_char == me
end
else
me == other
end
when Reline::Key
if other.is_a?(Integer)
me.combined_char == other
else
me == other
end
end
end
def match_status(input)
key_mapping.keys.select { |lhs|
start_with?(lhs, input)
}.tap { |it|
return :matched if it.size == 1 && equal?(it[0], input)
return :matching if it.size == 1 && !equal?(it[0], input)
return :matched if it.max_by(&:size)&.size&.< input.size
return :matching if it.size > 1
}
if key_mapping.keys.any? { |lhs| start_with?(input, lhs) }
:matched
else
match_unknown_escape_sequence(input).first
end
end
def expand(input)
lhs = key_mapping.keys.select { |item| start_with?(input, item) }.sort_by(&:size).last
unless lhs
status, size = match_unknown_escape_sequence(input)
case status
when :matched
return [:ed_unassigned] + expand(input.drop(size))
when :matching
return [:ed_unassigned]
else
return input
end
end
rhs = key_mapping[lhs]
case rhs
when String
rhs_bytes = rhs.bytes
expand(expand(rhs_bytes) + expand(input.drop(lhs.size)))
when Symbol
[rhs] + expand(input.drop(lhs.size))
when Array
rhs
end
end
private
# returns match status of CSI/SS3 sequence and matched length
def match_unknown_escape_sequence(input)
idx = 0
return [:unmatched, nil] unless input[idx] == ESC_BYTE
idx += 1
idx += 1 if input[idx] == ESC_BYTE
case input[idx]
when nil
return [:matching, nil]
when 91 # == '['.ord
# CSI sequence
idx += 1
idx += 1 while idx < input.size && CSI_PARAMETER_BYTES_RANGE.cover?(input[idx])
idx += 1 while idx < input.size && CSI_INTERMEDIATE_BYTES_RANGE.cover?(input[idx])
input[idx] ? [:matched, idx + 1] : [:matching, nil]
when 79 # == 'O'.ord
# SS3 sequence
input[idx + 1] ? [:matched, idx + 2] : [:matching, nil]
else
if idx == 1
# `ESC char`, make it :unmatched so that it will be handled correctly in `read_2nd_character_of_key_sequence`
[:unmatched, nil]
else
# `ESC ESC char`
[:matched, idx + 1]
end
end
end
def key_mapping
@config.key_bindings
end
end
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