Class: MarkdownIt::Parser

Inherits:
Object
  • Object
show all
Includes:
Common::Utils, Helpers
Defined in:
lib/motion-markdown-it/index.rb

Constant Summary

Constants included from Common::Utils

Common::Utils::DIGITAL_ENTITY_TEST_RE, Common::Utils::ENTITY_RE, Common::Utils::HTML_ESCAPE_REPLACE_RE, Common::Utils::HTML_ESCAPE_TEST_RE, Common::Utils::HTML_REPLACEMENTS, Common::Utils::REGEXP_ESCAPE_RE, Common::Utils::UNESCAPE_ALL_RE, Common::Utils::UNESCAPE_MD_RE, Common::Utils::UNICODE_PUNCT_RE

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Common::Utils

#arrayReplaceAt, #assign, #charCodeAt, #escapeHtml, #escapeRE, #fromCharCode, #fromCodePoint, #isMdAsciiPunct, #isPunctChar, #isSpace, #isValidEntityCode, #isWhiteSpace, #normalizeReference, #replaceEntityPattern, #unescapeAll, #unescapeMd

Constructor Details

#initialize(presetName = :default, options = {}) ⇒ Parser

new MarkdownIt([presetName, options])

  • presetName (String): optional, ‘commonmark` / `zero`

  • options (Object)

Creates parser instanse with given config. Can be called without ‘new`.

##### presetName

MarkdownIt provides named presets as a convenience to quickly enable/disable active syntax rules and options for common use cases.

##### options:

  • __html__ - ‘false`. Set `true` to enable HTML tags in source. Be careful! That’s not safe! You may need external sanitizer to protect output from XSS. It’s better to extend features via plugins, instead of enabling HTML.

  • __xhtmlOut__ - ‘false`. Set `true` to add ’/‘ when closing single tags (`<br />`). This is needed only for full CommonMark compatibility. In real world you will need HTML output.

  • __breaks__ - ‘false`. Set `true` to convert `n` in paragraphs into `
    `.

  • __langPrefix__ - ‘language-`. CSS language class prefix for fenced blocks. Can be useful for external highlighters.

  • __linkify__ - ‘false`. Set `true` to autoconvert URL-like text to links.

  • __typographer__ - ‘false`. Set `true` to enable [some language-neutral replacement](github.com/markdown-it/markdown-it/blob/master/lib/rules_core/replacements.js) + quotes beautification (smartquotes).

  • __quotes__ - ‘“”‘’`, String or Array. Double + single quotes replacement pairs, when typographer enabled and smartquotes on. For example, you can use `’«»„“‘` for Russian, `’„“‚‘‘` for German, and `[’«xA0’, ‘xA0»’, ‘‹xA0’, ‘xA0›’]‘ for French (including nbsp).

  • __highlight__ - ‘nil`. Highlighter function for fenced code blocks. Highlighter `function (str, lang)` should return escaped HTML. It can also return nil if the source was not changed and should be escaped externaly. If result starts with <pre… internal wrapper is skipped.

##### Example

“‘javascript // commonmark mode var md = require(’markdown-it’)(‘commonmark’);

// default mode var md = require(‘markdown-it’)();

// enable everything var md = require(‘markdown-it’)( 

html: true,
linkify: true,
typographer: true

); “‘

##### Syntax highlighting

“‘js var hljs = require(’highlight.js’) // highlightjs.org/

var md = require(‘markdown-it’)({

highlight: function (str, lang) {
  if (lang && hljs.getLanguage(lang)) {
    try {
      return hljs.highlight(lang, str, true).value;
    } catch (__) {}
  }

  return ''; // use external default escaping
}

}); “‘

Or with full wrapper override (if you need assign class to ‘<pre>`):

“‘javascript var hljs = require(’highlight.js’) // highlightjs.org/

// Actual default values var md = require(‘markdown-it’)({

highlight: function (str, lang) {
  if (lang && hljs.getLanguage(lang)) {
    try {
      return '<pre class="hljs"><code>' +
             hljs.highlight(lang, str, true).value +
             '</code></pre>';
    } catch (__) {}
  }

  return '<pre class="hljs"><code>' + md.utils.escapeHtml(str) + '</code></pre>';
}

}); “‘



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# File 'lib/motion-markdown-it/index.rb', line 223

def initialize(presetName = :default, options = {})
  if options.empty?
    if presetName.is_a? Hash
      options     = presetName
      presetName  = :default
    end
  end

  # MarkdownIt#inline -> ParserInline
  #
  # Instance of [[ParserInline]]. You may need it to add new rules when
  # writing plugins. For simple rules control use [[MarkdownIt.disable]] and
  # [[MarkdownIt.enable]].
  @inline = ParserInline.new

  # MarkdownIt#block -> ParserBlock
  #
  # Instance of [[ParserBlock]]. You may need it to add new rules when
  # writing plugins. For simple rules control use [[MarkdownIt.disable]] and
  # [[MarkdownIt.enable]].
  @block = ParserBlock.new

  # MarkdownIt#core -> Core
  #
  # Instance of [[Core]] chain executor. You may need it to add new rules when
  # writing plugins. For simple rules control use [[MarkdownIt.disable]] and
  # [[MarkdownIt.enable]].
  @core = ParserCore.new

  # MarkdownIt#renderer -> Renderer
  #
  # Instance of [[Renderer]]. Use it to modify output look. Or to add rendering
  # rules for new token types, generated by plugins.
  #
  # ##### Example
  #
  # ```javascript
  # var md = require('markdown-it')();
  #
  # function myToken(tokens, idx, options, env, self) {
  #   //...
  #   return result;
  # };
  #
  # md.renderer.rules['my_token'] = myToken
  # ```
  #
  # See [[Renderer]] docs and [source code](https://github.com/markdown-it/markdown-it/blob/master/lib/renderer.js).
  @renderer = Renderer.new

  # MarkdownIt#linkify -> LinkifyIt
  #
  # [linkify-it](https://github.com/markdown-it/linkify-it) instance.
  # Used by [linkify](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/linkify.js)
  # rule.
  @linkify = ::Linkify.new

  # MarkdownIt#validateLink(url) -> Boolean
  #
  # Link validation function. CommonMark allows too much in links. By default
  # we disable `javascript:`, `vbscript:`, `file:` schemas, and almost all `data:...` schemas
  # except some embedded image types.
  #
  # You can change this behaviour:
  #
  # ```javascript
  # var md = require('markdown-it')();
  # // enable everything
  # md.validateLink = function () { return true; }
  # ```
  @validateLink = VALIDATE_LINK

  # MarkdownIt#normalizeLink(url) -> String
  #
  # Function used to encode link url to a machine-readable format,
  # which includes url-encoding, punycode, etc.
  @normalizeLink = NORMALIZE_LINK

  # MarkdownIt#normalizeLinkText(url) -> String
  #
  # Function used to decode link url to a human-readable format`
  @normalizeLinkText = NORMALIZE_LINK_TEXT

  #  Expose utils & helpers for easy acces from plugins

  # MarkdownIt#utils -> utils
  #
  # Assorted utility functions, useful to write plugins. See details
  # [here](https://github.com/markdown-it/markdown-it/blob/master/lib/common/utils.js).
  # this.utils = utils;

  # MarkdownIt#helpers -> helpers
  #
  # Link components parser functions, useful to write plugins. See details
  # [here](https://github.com/markdown-it/markdown-it/blob/master/lib/helpers).
  # @helpers = assign({}, helpers);
  @helpers = MarkdownIt::Helpers::HelperWrapper.new

  @options = {}
  configure(presetName)
  set(options) if options
end

Instance Attribute Details

#block ⇒ Object

Returns the value of attribute block.



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# File 'lib/motion-markdown-it/index.rb', line 113

def block
  @block
end

#core ⇒ Object

Returns the value of attribute core.



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# File 'lib/motion-markdown-it/index.rb', line 114

def core
  @core
end

#helpers ⇒ Object

Returns the value of attribute helpers.



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# File 'lib/motion-markdown-it/index.rb', line 121

def helpers
  @helpers
end

#inline ⇒ Object

Returns the value of attribute inline.



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# File 'lib/motion-markdown-it/index.rb', line 112

def inline
  @inline
end

#linkify ⇒ Object

Returns the value of attribute linkify.



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# File 'lib/motion-markdown-it/index.rb', line 120

def linkify
  @linkify
end

#normalizeLink ⇒ Object

Returns the value of attribute normalizeLink.



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# File 'lib/motion-markdown-it/index.rb', line 118

def normalizeLink
  @normalizeLink
end

#normalizeLinkText ⇒ Object

Returns the value of attribute normalizeLinkText.



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# File 'lib/motion-markdown-it/index.rb', line 119

def normalizeLinkText
  @normalizeLinkText
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/motion-markdown-it/index.rb', line 116

def options
  @options
end

#renderer ⇒ Object

Returns the value of attribute renderer.



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# File 'lib/motion-markdown-it/index.rb', line 115

def renderer
  @renderer
end

#validateLink ⇒ Object

Returns the value of attribute validateLink.



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# File 'lib/motion-markdown-it/index.rb', line 117

def validateLink
  @validateLink
end

Instance Method Details

#configure(presets) ⇒ Object

chainable, internal MarkdownIt.configure(presets)

Batch load of all options and compenent settings. This is internal method, and you probably will not need it. But if you will - see available presets and data structure [here](github.com/markdown-it/markdown-it/tree/master/lib/presets)

We strongly recommend to use presets instead of direct config loads. That will give better compatibility with next versions.

Raises:

  • (ArgumentError) 


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# File 'lib/motion-markdown-it/index.rb', line 362

def configure(presets)
  raise(ArgumentError, 'Wrong `markdown-it` preset, can\'t be empty') unless presets

  unless presets.is_a? Hash
    presetName  = presets.to_sym
    presets     = CONFIG[presetName]
    raise(ArgumentError, "Wrong `markdown-it` preset #{presetName}, check name") unless presets
  end
  self.set(presets[:options]) if presets[:options]

  if presets[:components]
    presets[:components].each_key do |name|
      if presets[:components][name][:rules]
        self.send(name).ruler.enableOnly(presets[:components][name][:rules])
      end
      if presets[:components][name][:rules2]
        self.send(name).ruler2.enableOnly(presets[:components][name][:rules2])
      end
    end
  end
  return self
end

#disable(list, ignoreInvalid = false) ⇒ Object

chainable MarkdownIt.disable(list, ignoreInvalid)

  • list (String|Array): rule name or list of rule names to disable.

  • ignoreInvalid (Boolean): set ‘true` to ignore errors when rule not found.

The same as [[MarkdownIt.enable]], but turn specified rules off.



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# File 'lib/motion-markdown-it/index.rb', line 431

def disable(list, ignoreInvalid = false)
  result = []

  list = [ list ] if !list.is_a? Array

  result << @core.ruler.disable(list, true)
  result << @block.ruler.disable(list, true)
  result << @inline.ruler.disable(list, true)
  result << @inline.ruler2.disable(list, true)
  result.flatten!

  missed = list.select {|name| !result.include?(name) }
  if !(missed.empty? || ignoreInvalid)
    raise StandardError, "MarkdownIt. Failed to disable unknown rule(s): #{missed}"
  end

  return self
end

#enable(list, ignoreInvalid = false) ⇒ Object

chainable MarkdownIt.enable(list, ignoreInvalid)

  • list (String|Array): rule name or list of rule names to enable

  • ignoreInvalid (Boolean): set ‘true` to ignore errors when rule not found.

Enable list or rules. It will automatically find appropriate components, containing rules with given names. If rule not found, and ‘ignoreInvalid` not set - throws exception.

##### Example

“‘javascript var md = require(’markdown-it’)()

.enable(['sub', 'sup'])
.disable('smartquotes');

“‘



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# File 'lib/motion-markdown-it/index.rb', line 403

def enable(list, ignoreInvalid = false)
  result = []

  list = [ list ] if !list.is_a? Array

  result << @core.ruler.enable(list, true)
  result << @block.ruler.enable(list, true)
  result << @inline.ruler.enable(list, true)
  result << @inline.ruler2.enable(list, true)
  result.flatten!


  missed = list.select {|name| !result.include?(name) }
  if !(missed.empty? || ignoreInvalid)
    raise StandardError, "MarkdownIt. Failed to enable unknown rule(s): #{missed}"
  end

  return self
end

#parse(src, env) ⇒ Object

internal MarkdownIt.parse(src, env) -> Array

  • src (String): source string

  • env (Object): environment sandbox

Parse input string and return list of block tokens (special token type “inline” will contain list of inline tokens). You should not call this method directly, until you write custom renderer (for example, to produce AST).

‘env` is used to pass data between “distributed” rules and return additional metadata like reference info, needed for the renderer. It also can be used to inject data in specific cases. Usually, you will be ok to pass `{}`, and then pass updated object to renderer.

Raises:

  • (ArgumentError) 


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# File 'lib/motion-markdown-it/index.rb', line 488

def parse(src, env)
  raise ArgumentError.new('Input data should be a String') if !src.is_a?(String)

  state = RulesCore::StateCore.new(src, self, env)
  @core.process(state)
  return state.tokens
end

#parseInline(src, env) ⇒ Object

internal MarkdownIt.parseInline(src, env) -> Array

  • src (String): source string

  • env (Object): environment sandbox

The same as [[MarkdownIt.parse]] but skip all block rules. It returns the block tokens list with the single ‘inline` element, containing parsed inline tokens in `children` property. Also updates `env` object.



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# File 'lib/motion-markdown-it/index.rb', line 526

def parseInline(src, env)
  state             = RulesCore::StateCore.new(src, self, env)
  state.inlineMode  = true
  @core.process(state)
  return state.tokens
end

#render(src, env = {}) ⇒ Object

MarkdownIt.render(src [, env]) -> String

  • src (String): source string

  • env (Object): environment sandbox

Render markdown string into html. It does all magic for you :).

‘env` can be used to inject additional metadata (`{}` by default). But you will not need it with high probability. See also comment in [[MarkdownIt.parse]].



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# File 'lib/motion-markdown-it/index.rb', line 506

def render(src, env = {})
  # self.parse(src, { references: {} }).each {|token| pp token.to_json}

  return @renderer.render(parse(src, env), @options, env)
end

#renderInline(src, env = {}) ⇒ Object

MarkdownIt.renderInline(src [, env]) -> String

  • src (String): source string

  • env (Object): environment sandbox

Similar to [[MarkdownIt.render]] but for single paragraph content. Result will NOT be wrapped into ‘<p>` tags.



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# File 'lib/motion-markdown-it/index.rb', line 541

def renderInline(src, env = {})
  return @renderer.render(parseInline(src, env), @options, env)
end

#set(options) ⇒ Object

chainable MarkdownIt.set(options)

Set parser options (in the same format as in constructor). Probably, you will never need it, but you can change options after constructor call.

##### Example

“‘javascript var md = require(’markdown-it’)()

.set({ html: true, breaks: true })
.set({ typographer, true });

“‘

Note: To achieve the best possible performance, don’t modify a ‘markdown-it` instance options on the fly. If you need multiple configurations it’s best to create multiple instances and initialize each with separate config.



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# File 'lib/motion-markdown-it/index.rb', line 346

def set(options)
  assign(@options, options)
  return self
end

#to_html(src, env = {}) ⇒ Object 



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# File 'lib/motion-markdown-it/index.rb', line 513

def to_html(src, env = {})
  render(src, env)
end

#use(plugin, *args) ⇒ Object

chainable MarkdownIt.use(plugin, params)

Initialize and Load specified plugin with given params into current parser instance. It’s just a sugar to call ‘plugin.init_plugin(md, params)`

##### Example

“‘ruby md = MarkdownIt::Parser.new md.use(MDPlugin::Iterator, ’foo_replace’, ‘text’,

lambda {|tokens, idx|
  tokens[idx].content = tokens[idx].content.gsub(/foo/, 'bar')

}) “‘



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# File 'lib/motion-markdown-it/index.rb', line 467

def use(plugin, *args)
  plugin.init_plugin(self, *args)
  return self
end