Module: RuVim::Lang::Lua

Defined in:
lib/ruvim/lang/lua.rb

Constant Summary collapse

KEYWORDS = 
%w[
  and break do else elseif end false for function goto if in
  local nil not or repeat return then true until while
].freeze
KEYWORD_RE = 
/\b(?:#{KEYWORDS.join("|")})\b/
STRING_DOUBLE_RE = 
/"(?:\\.|[^"\\])*"/
STRING_SINGLE_RE = 
/'(?:\\.|[^'\\])*'/
LONG_STRING_RE = 
/\[\[.*?\]\]/
NUMBER_RE = 
/\b(?:0[xX][\da-fA-F]+(?:\.[\da-fA-F]+)?(?:[pP][+-]?\d+)?|\d+(?:\.\d+)?(?:[eE][+-]?\d+)?)\b/
LINE_COMMENT_RE = 
/--(?!\[\[).*/
BLOCK_COMMENT_RE = 
/--\[\[.*?\]\]/
BUILTIN_RE = 
/\b(?:print|type|tostring|tonumber|pairs|ipairs|next|select|unpack|require|error|assert|pcall|xpcall|setmetatable|getmetatable|rawget|rawset|rawequal|rawlen|table|string|math|io|os|coroutine|debug|package)\b/
INDENT_OPEN_RE = 
/\b(?:function|if|for|while|repeat|do|else|elseif)\b/
INDENT_CLOSE_RE = 
/\A\s*(?:end|until)\b/
INDENT_MID_RE = 
/\A\s*(?:else|elseif)\b/
DEDENT_TRIGGERS = 
{
  "d" => /\A(\s*)end\z/,
  "l" => /\A(\s*)until\z/,
  "e" => /\A(\s*)(?:else|elseif)\z/
}.freeze

Class Method Summary collapse

Class Method Details

.calculate_indent(lines, target_row, shiftwidth) ⇒ Object 



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# File 'lib/ruvim/lang/lua.rb', line 32

def calculate_indent(lines, target_row, shiftwidth)
  depth = 0
  (0...target_row).each do |row|
    line = lines[row].to_s.strip
    next if line.empty? || line.start_with?("--")

    depth += 1 if line.match?(/\b(?:function|if|for|while|repeat|do)\b/) && !line.match?(/\bend\b/)
    depth -= 1 if line.match?(/\A(?:end|until)\b/)
  end

  target_line = lines[target_row].to_s.strip
  depth -= 1 if target_line.match?(INDENT_CLOSE_RE) || target_line.match?(INDENT_MID_RE)
  depth = 0 if depth < 0
  depth * shiftwidth
end

.color_columns(text) ⇒ Object 



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# File 'lib/ruvim/lang/lua.rb', line 57

def color_columns(text)
  cols = {}
  Highlighter.apply_regex(cols, text, LONG_STRING_RE, Highlighter::STRING_COLOR)
  Highlighter.apply_regex(cols, text, STRING_DOUBLE_RE, Highlighter::STRING_COLOR)
  Highlighter.apply_regex(cols, text, STRING_SINGLE_RE, Highlighter::STRING_COLOR)
  Highlighter.apply_regex(cols, text, KEYWORD_RE, Highlighter::KEYWORD_COLOR)
  Highlighter.apply_regex(cols, text, BUILTIN_RE, "\e[35m")
  Highlighter.apply_regex(cols, text, NUMBER_RE, Highlighter::NUMBER_COLOR)
  Highlighter.apply_regex(cols, text, BLOCK_COMMENT_RE, Highlighter::COMMENT_COLOR, override: true)
  Highlighter.apply_regex(cols, text, LINE_COMMENT_RE, Highlighter::COMMENT_COLOR, override: true)
  cols
end

.dedent_trigger(char) ⇒ Object 



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# File 'lib/ruvim/lang/lua.rb', line 53

def dedent_trigger(char)
  DEDENT_TRIGGERS[char]
end

.indent_trigger?(line) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruvim/lang/lua.rb', line 48

def indent_trigger?(line)
  stripped = line.to_s.rstrip
  stripped.match?(/\b(?:function|if|for|while|repeat|do|then|else)\b/)
end