Class: Slim::EndInserter Private

Inherits:
Filter
  • Object
show all
Defined in:
lib/slim/end_inserter.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

In Slim you don't need to close any blocks:

  • if Slim.awesome? | But of course it is!

However, the parser is not smart enough (and that's a good thing) to automatically insert end's where they are needed. Luckily, this filter does exactly that (and it does it well!)

Constant Summary collapse

IF_RE =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

/\A(if|begin|unless|else|elsif|when|in|rescue|ensure)\b|\bdo\s*(\|[^\|]*\|)?\s*$/
ELSE_RE =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

/\A(else|elsif|when|in|rescue|ensure)\b/
END_RE =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

/\Aend\b/

Instance Method Summary collapse

Methods inherited from Filter

#on_slim_control, #on_slim_embedded, #on_slim_output, #on_slim_text

Instance Method Details

#on_multi(*exps) ⇒ Array

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Handle multi expression [:multi, *exps]

Returns:

  • (Array) —

    Corrected Temple expression with ends inserted



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
 
# File 'lib/slim/end_inserter.rb', line 21

def on_multi(*exps)
  result = [:multi]
  # This variable is true if the previous line was
  # (1) a control code and (2) contained indented content.
  prev_indent = false

  exps.each do |exp|
    if control?(exp)
      raise(Temple::FilterError, 'Explicit end statements are forbidden') if exp[2] =~ END_RE

      # Two control code in a row. If this one is *not*
      # an else block, we should close the previous one.
      append_end(result) if prev_indent && exp[2] !~ ELSE_RE

      # Indent if the control code starts a block.
      prev_indent = exp[2] =~ IF_RE
    elsif exp[0] != :newline && prev_indent
      # This is *not* a control code, so we should close the previous one.
      # Ignores newlines because they will be inserted after each line.
      append_end(result)
      prev_indent = false
    end

    result << compile(exp)
  end

  # The last line can be a control code too.
  prev_indent ? append_end(result) : result
end