Js Port

.gitignore

@@ -5,3 +5,7 @@
 /samples/*/*.html
 /samples/*/*.pdf
 pkg
+.bundle
+node_modules
+dist
+sample

.gitmodules

@@ -0,0 +1,8 @@
+[submodule "vendor/locales"]
+	path = vendor/locales
+	url = https://github.com/citation-style-language/locales.git
+	branch = master
+[submodule "vendor/styles"]
+	path = vendor/styles
+	url = https://github.com/citation-style-language/styles.git
+    branch = master

Gemfile

@@ -3,3 +3,5 @@ source 'https://rubygems.org'
 gemspec
 
 gem 'unicode_utils' if (Gem::Version.new RUBY_VERSION) < (Gem::Version.new '2.4.0')
+
+gem 'opal', :git => 'https://github.com/opal/opal.git', :ref => 'd136ea8'

Rakefile

@@ -25,3 +25,25 @@ rescue LoadError
 end
 
 task :default => default_tasks unless default_tasks.empty?
+
+
+JS_FILE = 'build/asciidoctor-bibtex.js'
+DIST_FILE = 'dist/main.js'
+
+task :js do
+  require 'opal'
+
+  builder = Opal::Builder.new(compiler_options: {
+    dynamic_require_severity: :error,
+  })
+  builder.append_paths 'lib'
+  builder.build 'asciidoctor-bibtex'
+
+  FileUtils.mkdir_p([File.dirname(JS_FILE), File.dirname(DIST_FILE)])
+  File.open(JS_FILE, 'w') do |file|
+    file << builder.to_s
+  end
+  File.binwrite "#{JS_FILE}.map", builder.source_map
+
+  FileUtils.cp JS_FILE, DIST_FILE, :verbose => true
+end

lib/asciidoctor-bibtex/citation_macro.rb

@@ -46,11 +46,11 @@ class CitationMacro
     # matches a citation item (key + locator), such as 'Dan2012(99-100)'
     CITATION_ITEM = /([^\s,()\[\]]+)(\([^)]*\))?/.freeze
     # matches a citation list
-    CITATION_LIST_TAIL = /(\s*,\s*#{CITATION_ITEM})*/.freeze
-    CITATION_LIST = /(?:#{CITATION_ITEM}#{CITATION_LIST_TAIL})/.freeze
+    CITATION_LIST_TAIL = /(\s*,\s*#{CITATION_ITEM.source})*/.freeze
+    CITATION_LIST = /(?:#{CITATION_ITEM.source}#{CITATION_LIST_TAIL.source})/.freeze
     CITATION_PRETEXT = /[^\[]*/.freeze
     # matches the full citation macro
-    CITATION_MACRO = /(#{CITATION_TYPE}):(#{CITATION_PRETEXT})\[(#{CITATION_LIST})\]/.freeze
+    CITATION_MACRO = /(#{CITATION_TYPE.source}):(#{CITATION_PRETEXT.source})\[(#{CITATION_LIST.source})\]/.freeze
 
     # Given a line, return a list of CitationData instances
     # containing information on each set of citation information

lib/asciidoctor-bibtex/extensions.rb

@@ -2,10 +2,12 @@
 # Treeprocessor extension for asciidoctor
 #
 
-require 'asciidoctor'
-require 'asciidoctor/extensions'
-require 'asciidoctor/reader'
-require 'asciidoctor/parser'
+unless RUBY_PLATFORM == 'opal'
+  require 'asciidoctor'
+  require 'asciidoctor/extensions'
+  require 'asciidoctor/reader'
+  require 'asciidoctor/parser'
+end
 
 require_relative 'path_utils'
 require_relative 'processor'

lib/asciidoctor-bibtex/js/bibtex.rb

@@ -0,0 +1,42 @@
+module AsciidoctorBibtex
+  `const {Cite, plugins} = require('@citation-js/core')`
+  `require('@citation-js/plugin-bibtex')`
+  require "native"
+
+  module BibTeX
+    def self.open(path, options = {})
+      file = File.read(path, encoding: 'utf-8')
+      return Bibliography.new(`new Cite(#{file})`)
+    end
+
+    class Bibliography
+      def initialize(js_bibliography)
+          @js_bibliography = js_bibliography
+
+          @entries = Hash.new(%x{#{@js_bibliography}.format('bibtex', { format: 'object'}).reduce((map, cite) => {
+              map[cite.label] = cite;
+              return map;
+            }, {})})
+          @entries = @entries.transform_values! { |bibtex_entry| Entry.new(bibtex_entry) }
+      end
+
+      def to_citeproc(options = {})
+        return @js_bibliography
+      end
+
+      def [](key)
+        return @entries[key]
+      end
+    end
+
+    class Entry 
+      attr_reader :author, :editor, :year
+
+      def initialize(bibtex_entry)
+        @author = bibtex_entry[:properties][:author]
+        @editor = bibtex_entry[:properties][:editor]
+        @year = bibtex_entry[:properties][:year]
+      end
+    end
+  end
+end

lib/asciidoctor-bibtex/js/citeproc.rb

@@ -0,0 +1,60 @@
+module AsciidoctorBibtex
+  `const {Cite, plugins} = require('@citation-js/core')`
+  `require('@citation-js/plugin-csl')`
+  `const { styles } = require('csl-js')`
+  `const path = require('path')`
+
+  module CiteProc
+    class Processor
+      attr_reader :style, :format, :locale
+
+      def initialize(options) 
+        @style = options[:style]
+        @format = options[:format]
+        @locale = options[:locale]
+
+        styleFilePath = "../vendor/styles/#{@style}.csl"
+        styleFilePath = `path.resolve(__dirname, #{styleFilePath})`
+        raise "bibtex-style '#{@style}' does not exist" unless File.file?(styleFilePath)
+
+        localeFilePath = "../vendor/locales/locales-#{@locale}.xml"
+        localeFilePath = `path.resolve(__dirname, #{localeFilePath})`
+        raise "bibtex-locale '#{@locale}' does not exist" unless  File.file?(localeFilePath)
+
+        styleFile = File.read(styleFilePath, encoding: 'utf-8')
+        localeFile = File.read(localeFilePath, encoding: 'utf-8')
+        %x{
+          let csl_config = plugins.config.get('@csl')
+          csl_config.templates.add(#{style}, #{styleFile})
+          csl_config.locales.add(#{locale}, #{localeFile})
+
+          // This is used for style_utils.rb as the lib itself doesn't expose infos about the csl styles
+          styles.set(#{style}, #{styleFile})
+        }
+      end 
+
+      def import(js_bibliography)
+        @js_bibliography = js_bibliography
+      end
+
+      def render(mode, cite_data) 
+        case mode
+        when :bibliography
+          return %x{#{@js_bibliography}.format('bibliography', { 
+            entry: #{cite_data[:id]}, 
+            template: #{@style},
+            lang: #{@locale}
+          })}, ""
+        when :citation
+          return %x{#{@js_bibliography}.format('citation', { 
+            entry: #{cite_data[:id]},
+            template: #{@style},
+            lang: #{@locale}
+          })}
+        else
+          raise ArgumentError, "cannot render unknown mode: #{mode.inspect}"
+        end
+      end
+    end
+  end
+end

lib/asciidoctor-bibtex/js/style_utils.rb

@@ -0,0 +1,8 @@
+module AsciidoctorBibtex
+  `const { styles } = require('csl-js')`
+  module StyleUtils
+    def self.is_numeric?(style)
+      return `styles.get(#{style}).info.category['citation-format'] === 'numeric'`
+    end
+  end
+end