Class: Unicode::DisplayWidth
- Inherits:
-
Object
- Object
- Unicode::DisplayWidth
- Defined in:
- lib/unicode/display_width.rb,
lib/unicode/display_width/index.rb,
lib/unicode/display_width/constants.rb
Constant Summary collapse
- INITIAL_DEPTH =
0x10000
- ASCII_NON_ZERO_REGEX =
/[\0\x05\a\b\n\v\f\r\x0E\x0F]/
- FIRST_4096 =
decompress_index(INDEX[0][0], 1)
- VERSION =
"2.5.0"
- UNICODE_VERSION =
"15.1.0"
- DATA_DIRECTORY =
File.(File.dirname(__FILE__) + "/../../../data/")
- INDEX_FILENAME =
DATA_DIRECTORY + "/display_width.marshal.gz"
Class Method Summary collapse
- .decompress_index(index, level) ⇒ Object
- .emoji_extra_width_of(string, ambiguous = 1, overwrite = {}, _ = {}) ⇒ Object
- .of(string, ambiguous = 1, overwrite = {}, options = {}) ⇒ Object
-
.width_all_features(string, ambiguous, overwrite, options) ⇒ Object
Same as .width_no_overwrite - but with applying overwrites for each char.
- .width_no_overwrite(string, ambiguous, options = {}) ⇒ Object
Instance Method Summary collapse
- #get_config(**kwargs) ⇒ Object
-
#initialize(ambiguous: 1, overwrite: {}, emoji: false) ⇒ DisplayWidth
constructor
A new instance of DisplayWidth.
- #of(string, **kwargs) ⇒ Object
Constructor Details
#initialize(ambiguous: 1, overwrite: {}, emoji: false) ⇒ DisplayWidth
Returns a new instance of DisplayWidth.
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# File 'lib/unicode/display_width.rb', line 104 def initialize(ambiguous: 1, overwrite: {}, emoji: false) @ambiguous = ambiguous @overwrite = overwrite @emoji = emoji end |
Class Method Details
.decompress_index(index, level) ⇒ Object
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# File 'lib/unicode/display_width/index.rb', line 14 def self.decompress_index(index, level) index.flat_map{ |value| if level > 0 if value.instance_of?(Array) value[15] ||= nil decompress_index(value, level - 1) else decompress_index([value] * 16, level - 1) end else if value.instance_of?(Array) value[15] ||= nil value else [value] * 16 end end } end |
.emoji_extra_width_of(string, ambiguous = 1, overwrite = {}, _ = {}) ⇒ Object
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# File 'lib/unicode/display_width.rb', line 86 def self.emoji_extra_width_of(string, ambiguous = 1, overwrite = {}, _ = {}) require "unicode/emoji" extra_width = 0 modifier_regex = /[#{ Unicode::Emoji::EMOJI_MODIFIERS.pack("U*") }]/ zwj_regex = /(?<=#{ [Unicode::Emoji::ZWJ].pack("U") })./ string.scan(Unicode::Emoji::REGEX){ |emoji| extra_width += 2 * emoji.scan(modifier_regex).size emoji.scan(zwj_regex){ |zwj_succ| extra_width += self.of(zwj_succ, ambiguous, overwrite) } } extra_width end |
.of(string, ambiguous = 1, overwrite = {}, options = {}) ⇒ Object
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# File 'lib/unicode/display_width.rb', line 12 def self.of(string, ambiguous = 1, overwrite = {}, = {}) if overwrite.empty? # Optimization for ASCII-only strings without certain control symbols if string.ascii_only? if string.match?(ASCII_NON_ZERO_REGEX) res = string.gsub(ASCII_NON_ZERO_REGEX, "").size - string.count("\b") res < 0 ? 0 : res else string.size end else width_no_overwrite(string, ambiguous, ) end else width_all_features(string, ambiguous, overwrite, ) end end |
.width_all_features(string, ambiguous, overwrite, options) ⇒ Object
Same as .width_no_overwrite - but with applying overwrites for each char
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# File 'lib/unicode/display_width.rb', line 57 def self.width_all_features(string, ambiguous, overwrite, ) # Sum of all chars widths res = string.codepoints.sum{ |codepoint| next overwrite[codepoint] if overwrite[codepoint] if codepoint > 15 && codepoint < 161 # very common next 1 elsif codepoint < 0x1001 width = FIRST_4096[codepoint] else width = INDEX depth = INITIAL_DEPTH while (width = width[codepoint / depth]).instance_of? Array codepoint %= depth depth /= 16 end end width == :A ? ambiguous : (width || 1) } # Substract emoji error res -= emoji_extra_width_of(string, ambiguous, overwrite) if [:emoji] # Return result + prevent negative lengths res < 0 ? 0 : res end |
.width_no_overwrite(string, ambiguous, options = {}) ⇒ Object
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# File 'lib/unicode/display_width.rb', line 30 def self.width_no_overwrite(string, ambiguous, = {}) # Sum of all chars widths res = string.codepoints.sum{ |codepoint| if codepoint > 15 && codepoint < 161 # very common next 1 elsif codepoint < 0x1001 width = FIRST_4096[codepoint] else width = INDEX depth = INITIAL_DEPTH while (width = width[codepoint / depth]).instance_of? Array codepoint %= depth depth /= 16 end end width == :A ? ambiguous : (width || 1) } # Substract emoji error res -= emoji_extra_width_of(string, ambiguous) if [:emoji] # Return result + prevent negative lengths res < 0 ? 0 : res end |
Instance Method Details
#get_config(**kwargs) ⇒ Object
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# File 'lib/unicode/display_width.rb', line 110 def get_config(**kwargs) [ kwargs[:ambiguous] || @ambiguous, kwargs[:overwrite] || @overwrite, { emoji: kwargs[:emoji] || @emoji }, ] end |
#of(string, **kwargs) ⇒ Object
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# File 'lib/unicode/display_width.rb', line 118 def of(string, **kwargs) self.class.of(string, *get_config(**kwargs)) end |