Class: Sass::Selector::SimpleSequence

157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 157

def do_extend(extends, parent_directives, replace, seen)
  seen_with_pseudo_selectors = seen.dup

  modified_original = false
  members = self.members.map do |sel|
    next sel unless sel.is_a?(Pseudo) && sel.selector
    next sel if seen.include?([sel])
    extended = sel.selector.do_extend(extends, parent_directives, replace, seen, false)
    next sel if extended == sel.selector
    extended.members.reject! {|seq| seq.has_placeholder?}

    # For `:not()`, we usually want to get rid of any complex
    # selectors because that will cause the selector to fail to
    # parse on all browsers at time of writing. We can keep them
    # if either the original selector had a complex selector, or
    # the result of extending has only complex selectors,
    # because either way we aren't breaking anything that isn't
    # already broken.
    if sel.normalized_name == 'not' &&
        (sel.selector.members.none? {|seq| seq.members.length > 1} &&
         extended.members.any? {|seq| seq.members.length == 1})
      extended.members.reject! {|seq| seq.members.length > 1}
    end

    modified_original = true
    result = sel.with_selector(extended)
    result.each {|new_sel| seen_with_pseudo_selectors << [new_sel]}
    result
  end.flatten

  groups = Sass::Util.group_by_to_a(extends[members.to_set]) {|ex| ex.extender}
  groups.map! do |seq, group|
    sels = group.map {|e| e.target}.flatten
    # If A {@extend B} and C {...},
    # seq is A, sels is B, and self is C

    self_without_sel = Sass::Util.array_minus(members, sels)
    group.each {|e| e.result = :failed_to_unify unless e.result == :succeeded}
    unified = seq.members.last.unify(SimpleSequence.new(self_without_sel, subject?))
    next unless unified
    group.each {|e| e.result = :succeeded}
    group.each {|e| check_directives_match!(e, parent_directives)}
    new_seq = Sequence.new(seq.members[0...-1] + [unified])
    new_seq.add_sources!(sources + [seq])
    [sels, new_seq]
  end
  groups.compact!
  groups.map! do |sels, seq|
    next [] if seen.include?(sels)
    seq.do_extend(
      extends, parent_directives, false, seen_with_pseudo_selectors + [sels], false)
  end
  groups.flatten!

  if modified_original || !replace || groups.empty?
    # First Law of Extend: the result of extending a selector should
    # (almost) always contain the base selector.
    #
    # See https://github.com/nex3/sass/issues/324.
    original = Sequence.new([SimpleSequence.new(members, @subject, source_range)])
    original.add_sources! sources
    groups.unshift original
  end
  groups.uniq!
  groups
end

298
299
300
301
302

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 298

def inspect
  res = members.map {|m| m.inspect}.join
  res << '!' if subject?
  res
end

45
46
47

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 45

def pseudo_elements
  @pseudo_elements ||= members.select {|sel| sel.is_a?(Pseudo) && sel.type == :element}
end

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

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 88

def resolve_parent_refs(super_cseq)
  resolved_members = @members.map do |sel|
    next sel unless sel.is_a?(Pseudo) && sel.selector
    sel.with_selector(sel.selector.resolve_parent_refs(super_cseq, false))
  end.flatten

  # Parent selector only appears as the first selector in the sequence
  unless (parent = resolved_members.first).is_a?(Parent)
    return CommaSequence.new([Sequence.new([SimpleSequence.new(resolved_members, subject?)])])
  end

  return super_cseq if @members.size == 1 && parent.suffix.nil?

  CommaSequence.new(super_cseq.members.map do |super_seq|
    members = super_seq.members.dup
    newline = members.pop if members.last == "\n"
    unless members.last.is_a?(SimpleSequence)
      raise Sass::SyntaxError.new("Invalid parent selector for \"#{self}\": \"" +
        super_seq.to_s + '"')
    end

    parent_sub = members.last.members
    unless parent.suffix.nil?
      parent_sub = parent_sub.dup
      parent_sub[-1] = parent_sub.last.dup
      case parent_sub.last
      when Sass::Selector::Class, Sass::Selector::Id, Sass::Selector::Placeholder
        parent_sub[-1] = parent_sub.last.class.new(parent_sub.last.name + parent.suffix)
      when Sass::Selector::Element
        parent_sub[-1] = parent_sub.last.class.new(
          parent_sub.last.name + parent.suffix,
          parent_sub.last.namespace)
      when Sass::Selector::Pseudo
        if parent_sub.last.arg || parent_sub.last.selector
          raise Sass::SyntaxError.new("Invalid parent selector for \"#{self}\": \"" +
            super_seq.to_s + '"')
        end
        parent_sub[-1] = Sass::Selector::Pseudo.new(
          parent_sub.last.type,
          parent_sub.last.name + parent.suffix,
          nil, nil)
      else
        raise Sass::SyntaxError.new("Invalid parent selector for \"#{self}\": \"" +
          super_seq.to_s + '"')
      end
    end

    Sequence.new(members[0...-1] +
      [SimpleSequence.new(parent_sub + resolved_members[1..-1], subject?)] +
      [newline].compact)
    end)
end

58
59
60

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 58

def rest
  @rest ||= Set.new(members - [base] - pseudo_elements)
end

49
50
51
52
53

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 49

def selector_pseudo_classes
  @selector_pseudo_classes ||= members.
    select {|sel| sel.is_a?(Pseudo) && sel.type == :class && sel.selector}.
    group_by {|sel| sel.normalized_name}
end

67
68
69

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 67

def subject?
  @subject
end

255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 255

def superselector?(their_sseq, parents = [])
  return false unless base.nil? || base.eql?(their_sseq.base)
  return false unless pseudo_elements.eql?(their_sseq.pseudo_elements)
  our_spcs = selector_pseudo_classes
  their_spcs = their_sseq.selector_pseudo_classes

  # Some psuedo-selectors can be subselectors of non-pseudo selectors.
  # Pull those out here so we can efficiently check against them below.
  their_subselector_pseudos = %w(matches any nth-child nth-last-child).
    map {|name| their_spcs[name] || []}.flatten

  # If `self`'s non-pseudo simple selectors aren't a subset of `their_sseq`'s,
  # it's definitely not a superselector. This also considers being matched
  # by `:matches` or `:any`.
  return false unless rest.all? do |our_sel|
    next true if our_sel.is_a?(Pseudo) && our_sel.selector
    next true if their_sseq.rest.include?(our_sel)
    their_subselector_pseudos.any? do |their_pseudo|
      their_pseudo.selector.members.all? do |their_seq|
        next false unless their_seq.members.length == 1
        their_sseq = their_seq.members.first
        next false unless their_sseq.is_a?(SimpleSequence)
        their_sseq.rest.include?(our_sel)
      end
    end
  end

  our_spcs.all? do |_name, pseudos|
    pseudos.all? {|pseudo| pseudo.superselector?(their_sseq, parents)}
  end
end

288
289
290
291
292

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 288

def to_s(opts = {})
  res = @members.map {|m| m.to_s(opts)}.join
  res << '!' if subject?
  res
end

237
238
239
240
241
242
243
244

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 237

def unify(other)
  sseq = members.inject(other.members) do |member, sel|
    return unless member
    sel.unify(member)
  end
  return unless sseq
  SimpleSequence.new(sseq, other.subject? || subject?)
end

309
310
311
312
313
314

# File '/Users/ceppstei/Projects/sass-lang/.sass/lib/sass/selector/simple_sequence.rb', line 309

def with_more_sources(sources)
  sseq = dup
  sseq.members = members.dup
  sseq.sources = self.sources | sources
  sseq
end