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# frozen_string_literal: true
module Slim
# 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!)
#
# @api private
class EndInserter < Filter
IF_RE = /\A(if|begin|unless|else|elsif|when|in|rescue|ensure)\b|\bdo\s*(\|[^\|]*\|)?\s*$/
ELSE_RE = /\A(else|elsif|when|in|rescue|ensure)\b/
END_RE = /\Aend\b/
# Handle multi expression `[:multi, *exps]`
#
# @return [Array] Corrected Temple expression with ends inserted
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
private
# Appends an end
def append_end(result)
result << [:code, 'end']
end
# Checks if an expression is a Slim control code
def control?(exp)
exp[0] == :slim && exp[1] == :control
end
end
end
Version data entries
8 entries across 8 versions & 2 rubygems