Class: MarkdownIt::RulesInline::Link

Inherits:
Object
  • Object
show all
Extended by:
Common::Utils
Defined in:
lib/motion-markdown-it/rules_inline/link.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

Class Method Summary collapse

Methods included from Common::Utils

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

Class Method Details



9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
 
# File 'lib/motion-markdown-it/rules_inline/link.rb', line 9

def self.link(state, silent)
  href            = ''
  title           = ''
  oldPos          = state.pos
  max             = state.posMax
  start           = state.pos
  parseReference  = true

  return false if (charCodeAt(state.src, state.pos) != 0x5B) # [

  labelStart = state.pos + 1
  labelEnd   = state.md.helpers.parseLinkLabel(state, state.pos, true)

  # parser failed to find ']', so it's not a valid link
  return false if (labelEnd < 0)

  pos = labelEnd + 1
  if (pos < max && charCodeAt(state.src, pos) == 0x28) # (
    #
    # Inline link
    #

    # might have found a valid shortcut link, disable reference parsing
    parseReference = false

    # [link](  <href>  "title"  )
    #        ^^ skipping these spaces
    pos += 1
    while pos < max
      code = charCodeAt(state.src, pos)
      break if (!isSpace(code) && code != 0x0A)
      pos += 1
    end
    return false if (pos >= max)

    # [link](  <href>  "title"  )
    #          ^^^^^^ parsing link destination
    start = pos
    res   = state.md.helpers.parseLinkDestination(state.src, pos, state.posMax)
    if (res[:ok])
      href = state.md.normalizeLink.call(res[:str])
      if (state.md.validateLink.call(href))
        pos = res[:pos]
      else
        href = ''
      end
    end

    # [link](  <href>  "title"  )
    #                ^^ skipping these spaces
    start = pos
    while pos < max
      code = charCodeAt(state.src, pos)
      break if (!isSpace(code) && code != 0x0A)
      pos += 1
    end

    # [link](  <href>  "title"  )
    #                  ^^^^^^^ parsing link title
    res = state.md.helpers.parseLinkTitle(state.src, pos, state.posMax)
    if (pos < max && start != pos && res[:ok])
      title = res[:str]
      pos   = res[:pos]

      # [link](  <href>  "title"  )
      #                         ^^ skipping these spaces
      while pos < max
        code = charCodeAt(state.src, pos)
        break if (!isSpace(code) && code != 0x0A)
        pos += 1
      end
    end

    if (pos >= max || charCodeAt(state.src, pos) != 0x29) # )
      # parsing a valid shortcut link failed, fallback to reference
      parseReference = true
    end
    pos += 1
  end

  if parseReference
    #
    # Link reference
    #
    return false if state.env[:references].nil?

    if (pos < max && charCodeAt(state.src, pos) == 0x5B)  # [
      start = pos + 1
      pos   = state.md.helpers.parseLinkLabel(state, pos)
      if (pos >= 0)
        label = state.src.slice(start...pos)
        pos += 1
      else
        pos = labelEnd + 1
      end
    else
      pos = labelEnd + 1
    end

    # covers label === '' and label === undefined
    # (collapsed reference link and shortcut reference link respectively)
    label = state.src.slice(labelStart...labelEnd) if label.nil? || label.empty?

    ref = state.env[:references][normalizeReference(label)]
    if (!ref)
      state.pos = oldPos
      return false
    end
    href  = ref[:href]
    title = ref[:title]
  end

  #
  # We found the end of the link, and know for a fact it's a valid link;
  # so all that's left to do is to call tokenizer.
  #
  if (!silent)
    state.pos    = labelStart
    state.posMax = labelEnd

    token        = state.push('link_open', 'a', 1)
    token.attrs  = attrs = [ [ 'href', href ] ]
    unless title.nil? || title.empty?
      attrs.push([ 'title', title ])
    end

    state.md.inline.tokenize(state)

    token        = state.push('link_close', 'a', -1)
  end

  state.pos     = pos
  state.posMax  = max
  return true
end