string-direction-1.2.1/0000755000004100000410000000000013311474176015036 5ustar www-datawww-datastring-direction-1.2.1/README.md0000644000004100000410000001337313311474176016324 0ustar www-datawww-data# string-direction `string-direction` is a ruby library for automatic detection of the direction (left-to-right, right-to-left or bi-directional) in which a text should be displayed. ## Overview ```ruby require 'string-direction' detector = StringDirection::Detector.new detector.direction('english') #=> 'ltr' detector.direction('العربية') #=> 'rtl' detector.direction("english العربية") #=> 'bidi' detector.ltr?('english') #=> true detector.rtl?('العربية') #=> true detector.bidi?('english') #=> false ``` But, if you prefer, you can monkey patch `String`: ```ruby String.send(:include, StringDirection::StringMethods) 'english'.direction #=> 'ltr' 'العربية'.rtl? #=> true ``` ## Strategies `string-direction` uses different strategies in order to try to detect the direction of a string. The detector uses them once at a time and returns the result once one of them succeeds, aborting any further analysis. Strategies are passed to the detector during its initialization: ```ruby detector = StringDirection::Detector.new(:foo, :bar) ``` In the above example, classes `StringDirection::FooStrategy` and `StringDirection::BarStrategy` have to be in the load path. Three strategies are natively integrated: `marks`, `characters` & `dominant`. `marks` && `characters` are used as default strategies if no arguments are given to the detector. ### marks Looks for the presence of Unicode direction marks: [left-to-right](http://en.wikipedia.org/wiki/Left-to-right_mark) (\u200e) or [right-to-left](http://en.wikipedia.org/wiki/Right-to-left_mark) (\u200f). ```ruby detector = StringDirection::Detector.new(:marks) detector.direction("\u200eالعربية") #=> "ltr" detector.direction("\u200fEnglish") #=> "rtl" ``` `marks` strategy can not only analyze a string but everything responding to `to_s`. ### characters Looks for the presence of right-to-left characters in the scripts used in the string. By default, `string-direction` consider following scripts to have a right-to-left writing: * Arabic * Hebrew * Nko * Kharoshthi * Phoenician * Syriac * Thaana * Tifinagh ```ruby detector = StringDirection::Detector.new(:characters) detector.direction('english') #=> 'ltr' detector.direction('العربية') #=> 'rtl' ``` You can change these defaults: ```ruby detector.direction('ᚪᚫᚬᚭᚮᚯ') #=> 'ltr' StringDirection.configure do |config| config.rtl_scripts << 'Runic' end detector.direction('ᚪᚫᚬᚭᚮᚯ') #=> 'rtl' ``` This can be useful, mainly, for scripts that have both left-to-right and right-to-left representations: * Bopomofo * Carian * Cypriot * Lydian * Old_Italic * Runic * Ugaritic Keep in mind than only [scripts recognized by Ruby regular expressions](http://www.ruby-doc.org/core-1.9.3/Regexp.html#label-Character+Properties) are allowed. `characters` strategy can not only analyze a string but everything responding to `to_s`. ### dominant With `dominant` strategy, a string can be left-to-right or right-to-left, but never bidi. It returns one or the other in function of which one has more characters. ```ruby detector = StringDirection::Detector.new(:dominant) detector.direction('e العربية') #=> 'rtl' detector.direction('english ة') #=> 'ltr' ``` As with `characters` strategy, you can change which scripts are considered right-to-left. `dominant` strategy can not only analyze a string but everything responding to `to_s`. ### Custom Strategies You can define your custom strategies. To do so, you just have to define a class inside `StringDirection` module with a name ending with `Strategy`. This class has to respond to an instance method `run` which takes the string as argument. You can inherit from `StringDirection::Strategy` to have convenient methods `ltr`, `rtl` and `bidi` which return expected result. If the strategy doesn't know the direction, it must return `nil`. ```ruby class StringDirection::AlwaysLtrStrategy < StringDirection::Strategy def run(string) ltr end end detector = StringDirection::Detector.new(:always_ltr) detector.direction('العربية') #=> 'ltr' ``` ### Changing default strategies `marks` and `characters` are default strategies, but you can change them: ```ruby StringDirection.configure do |config| config.default_strategies = [:custom, :marks, :always_ltr] end ``` ## Monkey patching String If you desire, you can monkey patch `String`: ```ruby String.send(:include, StringDirection::StringMethods) 'english'.direction #=> 'ltr' ``` In that case, strategies configured in `string_method_strategies` are used: ```ruby StringDirection.configure do |config| config.string_methods_strategies = [:marks, :characters] end ``` ## Release Policy `string-direction` follows the principles of [semantic versioning](http://semver.org/). ## Disclaimer I'm not an expert neither in World scripts nor in Unicode. So, please, if you know some case where this library is not working as it should be, [open an issue](https://github.com/laMarciana/string-direction/issues) and help improve it. ## Thanks [Omniglot.com](http://www.omniglot.com/), where I learnt which Ruby recognized scripts have a right-to-left writing system. ## LICENSE Copyright 2013 Marc Busqué - This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . string-direction-1.2.1/bin/0000755000004100000410000000000013311474176015606 5ustar www-datawww-datastring-direction-1.2.1/bin/console0000755000004100000410000000047013311474176017177 0ustar www-datawww-data#!/usr/bin/env ruby require 'bundler/setup' require 'string-direction' # You can add fixtures and/or initialization code here to make experimenting # with your gem easier. You can also use a different console, if you like. # (If you use this, don't forget to add pry to your Gemfile!) require 'pry' Pry.start string-direction-1.2.1/bin/setup0000755000004100000410000000016313311474176016674 0ustar www-datawww-data#!/bin/bash set -euo pipefail IFS=$'\n\t' bundle install # Do any other automated setup that you need to do here string-direction-1.2.1/spec/0000755000004100000410000000000013311474176015770 5ustar www-datawww-datastring-direction-1.2.1/spec/string-direction_spec.rb0000644000004100000410000000246313311474176022620 0ustar www-datawww-datarequire 'spec_helper' describe StringDirection do it 'has a version number' do expect(described_class::VERSION).not_to be nil end describe '::LTR' do it "is 'ltr'" do expect(described_class::LTR).to eq('ltr') end end describe '::RTL' do it "is 'rtl'" do expect(described_class::RTL).to eq('rtl') end end describe '::BIDI' do it "is 'bidi'" do expect(described_class::BIDI).to eq('bidi') end end describe '::configure' do it 'initializes configuration instance var with an instance of StringDirection::Configuration' do described_class.configure {} expect(described_class.configuration).to be_an_instance_of(StringDirection::Configuration) end it 'yields the Configuration instance' do expect { |b| described_class.configure(&b) }.to yield_with_args(StringDirection.configuration) end end describe '#reset_configuration' do it 'sets its configuration instance var as a new instance of Configuration' do StringDirection.configure {} configuration = StringDirection.configuration StringDirection.reset_configuration expect(StringDirection.configuration).to be_an_instance_of(StringDirection::Configuration) expect(StringDirection.configuration).not_to eq(configuration) end end end string-direction-1.2.1/spec/spec_helper.rb0000644000004100000410000000033513311474176020607 0ustar www-datawww-data$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__) require 'string-direction' require 'pry' Dir[File.join(__dir__, 'support/**/*.rb')].each { |f| require f } RSpec.configure do |config| config.color = true end string-direction-1.2.1/spec/string-direction/0000755000004100000410000000000013311474176021254 5ustar www-datawww-datastring-direction-1.2.1/spec/string-direction/string_methods_spec.rb0000644000004100000410000000257513311474176025655 0ustar www-datawww-datarequire 'spec_helper' describe StringDirection::StringMethods do subject { 'abc' } context 'in any case' do before :each do String.send(:include, StringDirection::StringMethods) end describe '#direction' do it 'returns string direction' do expect(subject.direction).to eq(StringDirection::LTR) end end describe '#ltr?' do it 'returns whether string direction is left-to-right' do expect(subject.ltr?).to eq(true) end end describe '#rtl?' do it 'returns whether string direction is right-to-left' do expect(subject.rtl?).to eq(false) end end describe '#bidi?' do it 'returns whether string direction is bidirectional' do expect(subject.bidi?).to eq(false) end end end context 'when StringDirection.configuration.string_methods_strategies is changed' do before :each do class StringDirection::AlwaysRtlStrategy < StringDirection::Strategy def run(string) rtl end end StringDirection.configure do |config| config.string_methods_strategies = [:always_rtl] end String.send(:include, StringDirection::StringMethods) end it 'uses that configured strategies' do expect('abc'.direction).to eq('rtl') end after :each do StringDirection.reset_configuration end end end string-direction-1.2.1/spec/string-direction/detector_spec.rb0000644000004100000410000000740213311474176024427 0ustar www-datawww-datarequire 'spec_helper' describe StringDirection::Detector do module StringDirection class LtrStrategy < Strategy def run(string) ltr end end class RtlStrategy < Strategy def run(string) rtl end end class BidiStrategy < Strategy def run(string) bidi end end class NilStrategy < Strategy def run(string) nil end end class CamelizeCamelizeStrategy < Strategy def run(string) nil end end end context '#initialize(*strategies)' do it 'initializes the strategies inflected from the arguments and adds them, in the same order, as strategies instance var array' do detector = described_class.new(:ltr, :nil) expect(detector.strategies.first).to be_an_instance_of(StringDirection::LtrStrategy) expect(detector.strategies.last).to be_an_instance_of(StringDirection::NilStrategy) end it 'infers strategy name camelizing, ending with "Strategy" and looking inside StringDirection module' do detector = described_class.new(:camelize_camelize) expect(detector.strategies.first).to be_an_instance_of(StringDirection::CamelizeCamelizeStrategy) end context "when it can't infer the strategy class from given symbol" do it 'raises an ArgumentError' do expect { described_class.new(:something) }.to raise_error(ArgumentError) end end context 'when stragies are not given' do it 'takes defaults set in default_strategies configuration option' do allow(StringDirection.configuration).to receive(:default_strategies).and_return([:ltr]) detector = described_class.new expect(detector.strategies.first).to be_an_instance_of(StringDirection::LtrStrategy) end end end context '#direction(string)' do context 'when first strategy detects direction' do it 'returns it' do detector = described_class.new(:ltr, :rtl) expect(detector.direction('abc')).to eq(StringDirection::LTR) end end context 'when first strategy does not detect direction' do it 'it tries with the second' do detector = described_class.new(:nil, :rtl) expect(detector.direction('abc')).to eq(StringDirection::RTL) end end context 'when no strategy detects direction' do it 'returns nil' do detector = described_class.new(:nil) expect(detector.direction('abc')).to be_nil end end end describe '#ltr?(string)' do context 'when string has left-to-right direction' do it 'returns true' do detector = described_class.new(:ltr) expect(detector.ltr?('abc')).to eq(true) end end context 'when string has not left-to-right direction' do it 'returns false' do detector = described_class.new(:rtl) expect(detector.ltr?('abc')).to eq(false) end end end describe '#rtl?(string)' do context 'when string has right-to-left direction' do it 'returns true' do detector = described_class.new(:rtl) expect(detector.rtl?('abc')).to eq(true) end end context 'when string has not right-to-left direction' do it 'returns false' do detector = described_class.new(:bidi) expect(detector.rtl?('abc')).to eq(false) end end end describe '#bidi?(string)' do context 'when string has bidirectional direction' do it 'returns true' do detector = described_class.new(:bidi) expect(detector.bidi?('abc')).to eq(true) end end context 'when string has not bidirectional direction' do it 'returns false' do detector = described_class.new(:ltr) expect(detector.bidi?('abc')).to eq(false) end end end end string-direction-1.2.1/spec/string-direction/strategies/0000755000004100000410000000000013311474176023426 5ustar www-datawww-datastring-direction-1.2.1/spec/string-direction/strategies/characters_strategy_spec.rb0000644000004100000410000000513213311474176031027 0ustar www-datawww-datarequire 'spec_helper' describe StringDirection::CharactersStrategy do describe '#run' do let(:english) { 'English' } let(:arabic) { 'العربية' } subject { described_class.new.run(string) } context 'when both left-to-right and right-to-left characters are present' do let(:string) { arabic + english } it "returns 'bidi'" do expect(subject).to eq 'bidi' end end context 'when right-to-left character are present but none of left-to-right' do let(:string) { arabic } it "returns 'rtl'" do expect(subject).to eq 'rtl' end end context 'when left-to-right character are present but none of right-to-left' do let(:string) { english } it "returns 'ltr'" do expect(subject).to eq 'ltr' end end context 'when neither left-to-right nor right-to-left characters are present' do let(:string) { ' ' } it 'returns nil' do expect(subject).to be_nil end end context 'when default right-to-left scripts are changed' do let(:new_rtl_script) { 'Latin' } let(:old_rtl_script) { 'Arabic' } context 'when there are characters from an added right-to-left script' do let(:string) { english } it 'treats them as right-to-left chracters' do StringDirection.configure do |config| config.rtl_scripts << new_rtl_script end expect(subject).to eq 'rtl' end end context 'when there are characters from a deleted right-to-left script ' do let(:string) { arabic } it 'treats them as left-to-right characters' do StringDirection.configure do |config| config.rtl_scripts.delete(old_rtl_script) end expect(subject).to eq 'ltr' end end after :each do StringDirection.reset_configuration end end context 'when special characters are present' do let(:string) do mark = "\u0903" punctuation = '_' symbol = '€' separator = ' ' other = "\u0005" arabic + mark + punctuation + symbol + separator + other end it 'ignores them' do expect(subject).to eq 'rtl' end end context 'when an object responding to #to_s is given' do let(:string) do class StringDirection::TestObject def to_s 'English' end end StringDirection::TestObject.new end it 'takes as string the result of #to_s method' do expect(subject).to eq('ltr') end end end end string-direction-1.2.1/spec/string-direction/strategies/marks_strategy_spec.rb0000644000004100000410000000267713311474176030040 0ustar www-datawww-datarequire 'spec_helper' describe StringDirection::MarksStrategy do describe '#run' do subject { described_class.new.run(string) } context 'when string contains the left-to-right mark but not the right-to-left mark' do let(:string) { described_class::LTR_MARK + 'abc' } it "returns 'ltr'" do expect(subject).to eql 'ltr' end end context 'when string contains the right-to-left mark but not the left-to-right mark' do let(:string) { described_class::RTL_MARK + 'abc' } it "returns 'rtl'" do expect(subject).to eql 'rtl' end end context 'when string contains both the left-to-right mark and the right-to-left mark' do let(:string) { described_class::LTR_MARK + described_class::RTL_MARK + 'abc' } it "returns 'bidi'" do expect(subject).to eql 'bidi' end end context 'when string neither contains the left-to-right mark nor the right-to-left mark' do let(:string) { 'abc' } it "returns nil" do expect(subject).to be_nil end end context 'when an object responding to #to_s is given' do let(:string) do class StringDirection::TestObject def to_s StringDirection::MarksStrategy::LTR_MARK end end StringDirection::TestObject.new end it 'takes as string the result of #to_s method' do expect(subject).to eq('ltr') end end end end string-direction-1.2.1/spec/string-direction/strategies/dominant_strategy_spec.rb0000644000004100000410000000551213311474176030523 0ustar www-datawww-datarequire 'spec_helper' describe StringDirection::DominantStrategy do describe '#run' do let(:english) { 'English' } let(:arabic) { 'العربية' } subject { described_class.new.run(string) } context 'when both left-to-right and right-to-left characters are present in equal numbers' do let(:string) { arabic + english } it "returns nil" do expect(subject).to eq nil end end context 'when both left-to-right and right-to-left characters are present, with more ltr' do let(:string) { english + arabic + english } it "returns 'ltr'" do expect(subject).to eq 'ltr' end end context 'when right-to-left character are present but none of left-to-right' do let(:string) { arabic } it "returns 'rtl'" do expect(subject).to eq 'rtl' end end context 'when left-to-right character are present but none of right-to-left' do let(:string) { english } it "returns 'ltr'" do expect(subject).to eq 'ltr' end end context 'when neither left-to-right nor right-to-left characters are present' do let(:string) { ' ' } it 'returns nil' do expect(subject).to be_nil end end context 'when default right-to-left scripts are changed' do let(:new_rtl_script) { 'Latin' } let(:old_rtl_script) { 'Arabic' } context 'when there are characters from an added right-to-left script' do let(:string) { english } it 'treats them as right-to-left chracters' do StringDirection.configure do |config| config.rtl_scripts << new_rtl_script end expect(subject).to eq 'rtl' end end context 'when there are characters from a deleted right-to-left script ' do let(:string) { arabic } it 'treats them as left-to-right characters' do StringDirection.configure do |config| config.rtl_scripts.delete(old_rtl_script) end expect(subject).to eq 'ltr' end end after :each do StringDirection.reset_configuration end end context 'when special characters are present' do let(:string) do mark = "\u0903" punctuation = '_' symbol = '€' separator = ' ' other = "\u0005" arabic + mark + punctuation + symbol + separator + other end it 'ignores them' do expect(subject).to eq 'rtl' end end context 'when an object responding to #to_s is given' do let(:string) do class StringDirection::TestObject def to_s 'English' end end StringDirection::TestObject.new end it 'takes as string the result of #to_s method' do expect(subject).to eq('ltr') end end end end string-direction-1.2.1/spec/string-direction/configuration_spec.rb0000644000004100000410000000131713311474176025464 0ustar www-datawww-datarequire 'spec_helper' describe StringDirection::Configuration do describe '#rtl_scripts' do it 'defaults to an array with Arabic, Hebrew, Nko, Kharoshthi, Phoenician, Syriac, Thaana and Tifinagh' do expect(subject.rtl_scripts).to match_array(%w(Arabic Hebrew Nko Kharoshthi Phoenician Syriac Thaana Tifinagh)) end end describe '#default_strategies' do it 'defaults to an array with :marks and :characters' do expect(subject.default_strategies).to eq([:marks, :characters]) end end describe '#string_methods_strategies' do it 'defaults to an array with :marks and :characters' do expect(subject.string_methods_strategies).to eq([:marks, :characters]) end end end string-direction-1.2.1/spec/string-direction/strategy_spec.rb0000644000004100000410000000017713311474176024462 0ustar www-datawww-datarequire 'spec_helper' describe StringDirection::Strategy do it { expect(subject).to respond_to(:run).with(1).argument } end string-direction-1.2.1/.gitignore0000644000004100000410000000003313311474176017022 0ustar www-datawww-data.yardoc/ *gem Gemfile.lock string-direction-1.2.1/string-direction.gemspec0000644000004100000410000000153413311474176021672 0ustar www-datawww-data# coding: utf-8 lib = File.expand_path('../lib', __FILE__) $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib) require 'string-direction/version' Gem::Specification.new do |s| s.name = 'string-direction' s.version = StringDirection::VERSION s.summary = 'Automatic detection of text direction (ltr, rtl or bidi) for strings' s.description = 'https://github.com/waiting-for-dev/string-direction/' s.license = 'GPL3' s.homepage = 'https://github.com/waiting-for-dev/string-direction/' s.authors = ['Marc Busqué'] s.email = 'marc@lamarciana.com' s.files = `git ls-files`.split("\n") s.add_development_dependency 'bundler', '~> 1.10' s.add_development_dependency 'rake', '~> 10.4' s.add_development_dependency 'rspec', '~> 3.3' s.add_development_dependency 'pry', '~> 0.10' s.add_development_dependency 'pry-byebug', '~> 3.2' end string-direction-1.2.1/docker-compose.yml0000644000004100000410000000014413311474176020472 0ustar www-datawww-dataversion: '2' services: app: build: . command: tail -f Gemfile volumes: - .:/app string-direction-1.2.1/COPYING.txt0000644000004100000410000010451313311474176016713 0ustar www-datawww-data GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. 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But first, please read . string-direction-1.2.1/Rakefile0000644000004100000410000000003413311474176016500 0ustar www-datawww-datarequire 'bundler/gem_tasks' string-direction-1.2.1/lib/0000755000004100000410000000000013311474176015604 5ustar www-datawww-datastring-direction-1.2.1/lib/string-direction.rb0000644000004100000410000000174313311474176021422 0ustar www-datawww-datarequire 'string-direction/version' require 'string-direction/configuration' require 'string-direction/detector' require 'string-direction/strategy' require 'string-direction/strategies/marks_strategy' require 'string-direction/strategies/characters_strategy' require 'string-direction/strategies/dominant_strategy' require 'string-direction/string_methods' # Constants & configuration common in the whole library module StringDirection # left-to-right identifier LTR = 'ltr'.freeze # right-to-left identifier RTL = 'rtl'.freeze # bidi identifier BIDI = 'bidi'.freeze class << self # {Configuration} object attr_accessor :configuration def configuration @configuration ||= Configuration.new end # Yields current {Configuration} def configure self.configuration ||= Configuration.new yield(configuration) end # Reset {Configuration} def reset_configuration self.configuration = Configuration.new end end end string-direction-1.2.1/lib/string-direction/0000755000004100000410000000000013311474176021070 5ustar www-datawww-datastring-direction-1.2.1/lib/string-direction/detector.rb0000644000004100000410000000470613311474176023235 0ustar www-datawww-datamodule StringDirection # String direction detector class Detector # Array of initialized strategies used, in order, to try to detect the direction of a string # # @return [Array] attr_accessor :strategies # Initialize strategies from given arguments. If no strategies are given, they are taken from the value of {StringDirection::Configuration#default_strategies} # # @raise [ArgumentError] if strategy class is not found. For example, for an strategy `:marks` a class `StringDirection::MarksStrategy` is expected def initialize(*strategies) strategies = StringDirection.configuration.default_strategies if strategies.empty? initialize_strategies(strategies) end # Tries to detect and return the direction of a string. It returns `ltr` if the string is left-to-right, `rtl` if it is right-to-left, `bidi` if it is bidirectional or `nil` if it can't detect the direction. It iterates through {#strategies} until one of them successes. # # @param string [String] The string to inspect # @return [String, nil] def direction(string) direction = nil strategies.each do |strategy| direction = strategy.run(string) break if direction end direction end # Returns whether string is left-to-right or not # # @param string [String] The string to inspect # @return [Boolean] def ltr?(string) direction(string) == ltr end # Returns whether string is right-to-left or not # # @param string [String] The string to inspect # @return [Boolean] def rtl?(string) direction(string) == rtl end # Returns whether string is bidirectional or not # # @param string [String] The string to inspect # @return [Boolean] def bidi?(string) direction(string) == bidi end private def initialize_strategies(strategies) self.strategies = strategies.map do |strategy| begin name = infer_strategy_class_name(strategy) Kernel.const_get(name).new rescue NameError raise ArgumentError, "Can't find '#{name}' strategy" end end end def infer_strategy_class_name(strategy) base_name = strategy.to_s.split('_').map(&:capitalize).join "StringDirection::#{base_name}Strategy" end def ltr StringDirection::LTR end def rtl StringDirection::RTL end def bidi StringDirection::BIDI end end end string-direction-1.2.1/lib/string-direction/version.rb0000644000004100000410000000011313311474176023075 0ustar www-datawww-datamodule StringDirection # Current library version VERSION = '1.2.1' end string-direction-1.2.1/lib/string-direction/strategies/0000755000004100000410000000000013311474176023242 5ustar www-datawww-datastring-direction-1.2.1/lib/string-direction/strategies/characters_strategy.rb0000644000004100000410000000246713311474176027641 0ustar www-datawww-datamodule StringDirection # Strategy to detect direction from the scripts to which string characters belong class CharactersStrategy < Strategy # Ignored characters: unicode marks, punctuations, symbols, separator and other general categories IGNORED_CHARS = '\p{M}\p{P}\p{S}\p{Z}\p{C}'.freeze # Inspect to wich scripts characters belongs and infer from them the string direction. right-to-left scripts are those in {Configuration#rtl_scripts} # # params [String] The string to inspect # @return [String, nil] def run(string) string = string.to_s if ltr_characters?(string) && rtl_characters?(string) bidi elsif ltr_characters?(string) ltr elsif rtl_characters?(string) rtl end end private def rtl_regex @rtl_regex ||= /[#{rtl_script_character_classes}]/ end def ltr_regex @ltr_regex ||= /[^#{rtl_script_character_classes}#{IGNORED_CHARS}]/ end def rtl_characters?(string) string.match(rtl_regex) end def ltr_characters?(string) string.match(ltr_regex) end def rtl_script_character_classes @rtl_script_character_classes ||= rtl_scripts.map { |script| "\\p{#{script}}" }.join end def rtl_scripts StringDirection.configuration.rtl_scripts end end end string-direction-1.2.1/lib/string-direction/strategies/dominant_strategy.rb0000644000004100000410000000153013311474176027321 0ustar www-datawww-datamodule StringDirection # Strategy to decide direction between ltr or rtl in function of which is the main type class DominantStrategy < CharactersStrategy # Get the number of ltr and rtl characters in the supplied string and infer # direction from the most common type. For this strategy the direction can # be ltr or rtl, but never bidi. In case of draw it returns nil. # # params [String] The string to inspect # @return [String, nil] def run(string) string = string.to_s ltr_count = chars_count(string, ltr_regex) rtl_count = chars_count(string, rtl_regex) diff = ltr_count - rtl_count return ltr if diff > 0 return rtl if diff < 0 nil end private def chars_count(string, regex) count = 0 string.scan(regex) { count += 1 } count end end end string-direction-1.2.1/lib/string-direction/strategies/marks_strategy.rb0000644000004100000410000000144313311474176026630 0ustar www-datawww-datamodule StringDirection # Strategy to detect direction looking for the presence of unicode marks class MarksStrategy < Strategy # left-to-right unicode mark LTR_MARK = "\u200e".freeze # right-to-right unicode mark RTL_MARK = "\u200f".freeze # Look for the presence of unicode marks in given string and infers from them its direction # # params [String] The string to inspect # @return [String, nil] def run(string) string = string.to_s if ltr_mark?(string) && rtl_mark?(string) bidi elsif ltr_mark?(string) ltr elsif rtl_mark?(string) rtl end end private def ltr_mark?(string) string.include?(LTR_MARK) end def rtl_mark?(string) string.include?(RTL_MARK) end end end string-direction-1.2.1/lib/string-direction/string_methods.rb0000644000004100000410000000167613311474176024460 0ustar www-datawww-datamodule StringDirection # Methods intended to be monkey patched to String through `String.include(StringDirection::StringMethods)`. This will allow stuff like `'English'.direction #=> 'ltr'`. All methods are delegated to {Detector} with `self` as string argument. module StringMethods # @see Detector#direction # @return [String] def direction string_direction_detector.direction(self) end # @see Detector#ltr? def ltr? string_direction_detector.ltr?(self) end # @see Detector#rtl? def rtl? string_direction_detector.rtl?(self) end # @see Detector#bidi? def bidi? string_direction_detector.bidi?(self) end private def string_direction_detector @string_direction_detector ||= StringDirection::Detector.new(*string_direction_strategies) end def string_direction_strategies StringDirection.configuration.string_methods_strategies end end end string-direction-1.2.1/lib/string-direction/configuration.rb0000644000004100000410000000251013311474176024262 0ustar www-datawww-datamodule StringDirection # {StringDirection} configuration class Configuration # Scripts for which characters are treated as right-to-left. Defaults to Arabic, Hebrew, Nko, Kharoshthi, Phoenician, Syriac, Thaana and Tifinagh. Notice than only {http://ruby-doc.org/core-2.2.3/Regexp.html#class-Regexp-label-Character+Properties recognized Ruby regular expression scripts} are accepted. # # @return [Array] attr_accessor :rtl_scripts # Default strategies, in order, that {Detector} uses if they are not given explicetly. Values are symbols with a matching class expected. For example, `:marks` expects a class `StringDirection::MarksStrategy` to exist. Defaults to `:marks` and `:characters`. # # @return [Array] attr_accessor :default_strategies # Strategies, in order, that {StringMethods} uses. Values are symbols with a matching class expected. For example, `:marks` expects a class `StringDirection::MarksStrategy` to exist. Defaults to `:marks` and `:characters`. # # @return [Array] attr_accessor :string_methods_strategies # Initialize defaults def initialize self.rtl_scripts = %w(Arabic Hebrew Nko Kharoshthi Phoenician Syriac Thaana Tifinagh) self.default_strategies = [:marks, :characters] self.string_methods_strategies = [:marks, :characters] end end end string-direction-1.2.1/lib/string-direction/strategy.rb0000644000004100000410000000120413311474176023254 0ustar www-datawww-datamodule StringDirection # @abstract Subclass and override {#run} to implement class Strategy # Each strategy must implement this method, accepting an string as its argument. It must return {StringDirection::LTR}, {StringDirection::RTL}, {StringDirection::BIDI} depending on direction detected, or nil on detection failure # @abstract # @raise [NotImplementedError] def run(string) fail NotImplementedError, "`run` method must be implemented" end private def ltr StringDirection::LTR end def rtl StringDirection::RTL end def bidi StringDirection::BIDI end end end string-direction-1.2.1/.yardopts0000644000004100000410000000003213311474176016677 0ustar www-datawww-data-m markdown - COPYING.txt string-direction-1.2.1/Gemfile0000644000004100000410000000013613311474176016331 0ustar www-datawww-datasource 'https://rubygems.org' # Specify your gem's dependencies in algorithm.gemspec gemspec string-direction-1.2.1/Dockerfile0000644000004100000410000000047513311474176017036 0ustar www-datawww-dataFROM ruby:2.4.3 ENV APP_HOME /app/ ENV LIB_DIR lib/string-direction/ RUN apt-get update -qq && apt-get install -y build-essential libpq-dev libxml2-dev libxslt1-dev nodejs RUN mkdir -p $APP_HOME/$LIB_DIR WORKDIR $APP_HOME COPY Gemfile *gemspec $APP_HOME COPY $LIB_DIR/version.rb $APP_HOME/$LIB_DIR RUN bundle install