Class: Solargraph::CodeMap

Inherits:
Object
  • Object
show all
Includes:
NodeMethods
Defined in:
lib/solargraph/code_map.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from NodeMethods

#const_from, #infer, #pack_name, #resolve_node_signature, #stack_node_signature, #unpack_name, #yard_options

Constructor Details

#initialize(code: '', filename: nil, workspace: nil, api_map: nil) ⇒ CodeMap 



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# File 'lib/solargraph/code_map.rb', line 13

def initialize code: '', filename: nil, workspace: nil, api_map: nil
  @workspace = workspace
  # HACK: Adjust incoming filename's path separator for yardoc file comparisons

  filename = filename.gsub(File::ALT_SEPARATOR, File::SEPARATOR) unless filename.nil? or File::ALT_SEPARATOR.nil?
  @filename = filename
  @api_map = api_map
  @code = code.gsub(/\r/, '')
  tries = 0
  tmp = @code
  begin
    # HACK: The current file is parsed with a trailing underscore to fix

    # incomplete trees resulting from short scripts (e.g., a lone variable

    # assignment).

    node, @comments = Parser::CurrentRuby.parse_with_comments(tmp + "\n_")
    @node = self.api_map.append_node(node, @comments, filename)
    @parsed = tmp
    @code.freeze
    @parsed.freeze
  rescue Parser::SyntaxError => e
    if tries < 10
      tries += 1
      if tries == 10 and e.message.include?('token $end')
        tmp += "\nend"
      else
        spot = e.diagnostic.location.begin_pos
        repl = '_'
        if tmp[spot] == '@' or tmp[spot] == ':'
          # Stub unfinished instance variables and symbols

          spot -= 1
        elsif tmp[spot - 1] == '.'
          # Stub unfinished method calls

          repl = '#' if spot == tmp.length or tmp[spot] == '\n'
          spot -= 2
        else
          # Stub the whole line

          spot = beginning_of_line_from(tmp, spot)
          repl = '#'
          if tmp[spot+1..-1].rstrip == 'end'
            repl= 'end;end'
          end
        end
        tmp = tmp[0..spot] + repl + tmp[spot+repl.length+1..-1].to_s
      end
      retry
    end
    raise e
  end
end

Instance Attribute Details

#code ⇒ Object (readonly)

Returns the value of attribute code.



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# File 'lib/solargraph/code_map.rb', line 6

def code
  @code
end

#filename ⇒ Object (readonly)

Returns the value of attribute filename.



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# File 'lib/solargraph/code_map.rb', line 8

def filename
  @filename
end

#node ⇒ Object

Returns the value of attribute node.



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# File 'lib/solargraph/code_map.rb', line 5

def node
  @node
end

#parsed ⇒ Object (readonly)

Returns the value of attribute parsed.



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# File 'lib/solargraph/code_map.rb', line 7

def parsed
  @parsed
end

#workspace ⇒ Object (readonly)

Returns the value of attribute workspace.



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# File 'lib/solargraph/code_map.rb', line 9

def workspace
  @workspace
end

Instance Method Details

#api_map ⇒ Solargraph::ApiMap 



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# File 'lib/solargraph/code_map.rb', line 63

def api_map
  @api_map ||= ApiMap.new(workspace)
end

#build_signature(node, parts) ⇒ Array<String>

Build a signature from the specified node. This method returns the node as an array of strings.



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# File 'lib/solargraph/code_map.rb', line 438

def build_signature(node, parts)
  if node.kind_of?(AST::Node)
    if node.type == :send
      parts.unshift node.children[1].to_s
    elsif node.type == :const
      parts.unshift unpack_name(node)
    end
    build_signature(node.children[0], parts)
  end
end

#comment_at?(index) ⇒ Boolean

Determine if the specified index is inside a comment.



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# File 'lib/solargraph/code_map.rb', line 105

def comment_at?(index)
  @comments.each do |c|
    return true if index > c.location.expression.begin_pos and index <= c.location.expression.end_pos
  end
  false
end

#get_instance_variables_at(index) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 180

def get_instance_variables_at(index)
  node = parent_node_from(index, :def, :defs, :class, :module)
  ns = namespace_at(index) || ''
  api_map.get_instance_variables(ns, (node.type == :def ? :instance : :class))
end

#get_local_variables_and_methods_at(index) ⇒ Array<Solargraph::Suggestion>

Get an array of local variables and methods that can be accessed from the specified location in the code.



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# File 'lib/solargraph/code_map.rb', line 472

def get_local_variables_and_methods_at(index)
  result = []
  local = parent_node_from(index, :class, :module, :def, :defs) || @node
  result += get_local_variables_from(local)
  scope = namespace_at(index) || @node
  if local.type == :def
    result += api_map.get_instance_methods(scope, visibility: [:public, :private, :protected])
  else
    result += api_map.get_methods(scope, visibility: [:public, :private, :protected])
  end
  if local.type == :def or local.type == :defs
    result += get_method_arguments_from local
  end
  result += api_map.get_methods('Kernel')
  result
end

#get_offset(line, col) ⇒ Integer

Get the offset of the specified line and column. The offset (also called the "index") is typically used to identify the cursor's location in the code when generating suggestions. The line and column numbers should start at zero.



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# File 'lib/solargraph/code_map.rb', line 73

def get_offset line, col
  offset = 0
  if line > 0
    @code.lines[0..line - 1].each { |l|
      offset += l.length
    }
  end
  offset + col
end

#get_signature_at(index) ⇒ String

Get the signature at the specified index. A signature is a method call that can start with a constant, method, or variable and does not include any method arguments. Examples:

Code Signature

String.new String.new y.split(', ').length y.split.length



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# File 'lib/solargraph/code_map.rb', line 402

def get_signature_at index
  brackets = 0
  squares = 0
  parens = 0
  signature = ''
  index -=1
  while index >= 0
    break if brackets > 0 or parens > 0 or squares > 0
    char = @code[index, 1]
    if char == ')'
      parens -=1
    elsif char == ']'
      squares -=1
    elsif char == '}'
      brackets -= 1
    elsif char == '('
      parens += 1
    elsif char == '{'
      brackets += 1
    elsif char == '['
      squares += 1
    end
    if brackets == 0 and parens == 0 and squares == 0
      break if ['"', "'", ',', ' ', "\t", "\n"].include?(char)
      signature = char + signature if char.match(/[a-z0-9:\._@]/i)
      break if char == '@'
    end
    index -= 1
  end
  signature
end

#get_snippets_at(index) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 449

def get_snippets_at(index)
  result = []
  Snippets.definitions.each_pair { |name, detail|
    matched = false
    prefix = detail['prefix']
    while prefix.length > 0
      if @code[index-prefix.length, prefix.length] == prefix
        matched = true
        break
      end
      prefix = prefix[0..-2]
    end
    if matched
      result.push Suggestion.new(detail['prefix'], kind: Suggestion::SNIPPET, detail: name, insert: detail['body'].join("\r\n"))
    end
  }
  result
end

#get_type_comment(node) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 380

def get_type_comment node
  obj = nil
  cmnt = api_map.get_comment_for(node)
  unless cmnt.nil?
    tag = cmnt.tag(:type)
    obj = tag.types[0] unless tag.nil? or tag.types.empty?
  end
  obj
end

#infer_signature_at(index) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 291

def infer_signature_at index
  signature = get_signature_at(index)
  node = parent_node_from(index, :class, :module, :def, :defs) || @node
  infer_signature_from_node signature, node
end

#infer_signature_from_node(signature, node) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 306

def infer_signature_from_node signature, node
  inferred = nil
  parts = signature.split('.')
  ns_here = namespace_from(node)
  start = parts[0]
  return nil if start.nil?
  remainder = parts[1..-1]
  scope = :instance
  var = find_local_variable_node(start, node)
  if var.nil?
    if start.start_with?('@')
      scope2 = (node.type == :def ? :instance : :class)
      type = api_map.infer_instance_variable(start, ns_here, scope2)
    else
      if node.type == :def or node.type == :defs
        args = get_method_arguments_from(node).keep_if{|a| a.label == start}
        if args.empty?
          scope = :class
          type = api_map.find_fully_qualified_namespace(start, ns_here)
          if type.nil?
            # It's a method call

            sig_scope = (node.type == :def ? :instance : :class)
            type = api_map.infer_signature_type(start, ns_here, scope: sig_scope)
          else
            return nil if remainder.empty?
          end
        else
          cmnt = api_map.get_comment_for(node)
          unless cmnt.nil?
            params = cmnt.tags(:param)
            unless params.nil?
              params.each do |p|
                if p.name == args[0].label
                  type = p.types[0]
                  break
                end
              end
            end
          end
        end
      else
        scope = :class
        type = api_map.find_fully_qualified_namespace(start, ns_here)
        if type.nil?
          # It's a method call

          sig_scope = (node.type == :def ? :instance : :class)
          type = api_map.infer_signature_type(start, ns_here, scope: sig_scope)
        else
          return nil if remainder.empty?
        end
      end
    end
  else
    # Signature starts with a local variable

    type = get_type_comment(var)
    type = infer(var.children[1]) if type.nil?
    if type.nil?
      vsig = resolve_node_signature(var.children[1])
      type = infer_signature_from_node vsig, node
    end
  end
  unless type.nil?
    inferred = api_map.infer_signature_type(remainder.join('.'), type, scope: scope)
  end
  inferred
end

#local_variable_in_node?(name, node) ⇒ Boolean 



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# File 'lib/solargraph/code_map.rb', line 297

def local_variable_in_node?(name, node)
  return true unless find_local_variable_node(name, node).nil?
  if node.type == :def or node.type == :defs
    args = get_method_arguments_from(node).keep_if{|a| a.label == name}
    return true unless args.empty?
  end
  false
end

#namespace_at(index) ⇒ String

Get the namespace at the specified location. For example, given the code class Foo; def bar; end; end, index 14 (the center) is in the "Foo" namespace.



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# File 'lib/solargraph/code_map.rb', line 127

def namespace_at(index)
  tree = tree_at(index)
  return nil if tree.length == 0
  slice = tree
  parts = []
  slice.reverse.each { |n|
    if n.type == :class or n.type == :module
      c = const_from(n.children[0])
      parts.push c
    end
  }
  parts.join("::")
end

#namespace_from(node) ⇒ String

Get the namespace for the specified node. For example, given the code class Foo; def bar; end; end, the node for def bar is in the "Foo" namespace.



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# File 'lib/solargraph/code_map.rb', line 146

def namespace_from(node)
  if node.respond_to?(:loc)
    namespace_at(node.loc.expression.begin_pos)
  else
    ''
  end
end

#node_at(index) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 90

def node_at(index)
  tree_at(index).first
end

#parent_node_from(index, *types) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 112

def parent_node_from(index, *types)
  arr = tree_at(index)
  arr.each { |a|
    if a.kind_of?(AST::Node) and (types.empty? or types.include?(a.type))
      return a
    end
  }
  @node
end

#phrase_at(index) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 154

def phrase_at index
  word = ''
  cursor = index - 1
  while cursor > -1
    char = @code[cursor, 1]
    break if char.nil? or char == ''
    break unless char.match(/[\s;=\(\)\[\]\{\}]/).nil?
    word = char + word
    cursor -= 1
  end
  word
end

#resolve_object_at(index) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 256

def resolve_object_at index
  return [] if string_at?(index)
  signature = get_signature_at(index)
  cursor = index
  while @code[cursor] =~ /[a-z0-9_\?]/i
    signature += @code[cursor]
    cursor += 1
    break if cursor >= @code.length
  end
  return [] if signature.to_s == ''
  path = nil
  ns_here = namespace_at(index)
  node = parent_node_from(index, :class, :module, :def, :defs) || @node
  parts = signature.split('.')
  if parts.length > 1
    beginner = parts[0..-2].join('.')
    type = infer_signature_from_node(beginner, node)
    ender = parts.last
    path = "#{type}##{ender}"
  else
    if local_variable_in_node?(signature, node)
      path = infer_signature_from_node(signature, node)
    elsif signature.start_with?('@')
      path = api_map.infer_instance_variable(signature, ns_here, (node.type == :def ? :instance : :class))
    else
      path = signature
    end
    if path.nil?
      path = api_map.find_fully_qualified_namespace(signature, ns_here)
    end
  end
  return [] if path.nil?
  return api_map.yard_map.objects(path, ns_here)
end

#signatures_at(index) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 249

def signatures_at index
  sig = signature_index_before(index)
  return [] if sig.nil?
  word = word_at(sig)
  suggest_at(sig).reject{|s| s.label != word}
end

#string_at?(index) ⇒ Boolean

Determine if the specified index is inside a string.



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# File 'lib/solargraph/code_map.rb', line 97

def string_at?(index)
  n = node_at(index)
  n.kind_of?(AST::Node) and n.type == :str
end

#suggest_at(index, filtered: false, with_snippets: false) ⇒ Array<Suggestions>

Get suggestions for code completion at the specified location in the source.



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# File 'lib/solargraph/code_map.rb', line 190

def suggest_at index, filtered: false, with_snippets: false
  return [] if string_at?(index) or string_at?(index - 1) or comment_at?(index)
  result = []
  phrase = phrase_at(index)
  signature = get_signature_at(index)
  namespace = namespace_at(index)
  if signature.include?('.')
    # Check for literals first

    type = infer(node_at(index - 2))
    if type.nil?
      nearest = @code[0, index].rindex('.')
      revised = signature[0..nearest-index-1]
      type = infer_signature_at(nearest) unless revised.empty?
      if !type.nil?
        result.concat api_map.get_instance_methods(type) unless type.nil?
      elsif !revised.include?('.')
        fqns = api_map.find_fully_qualified_namespace(revised, namespace)
        result.concat api_map.get_methods(fqns) unless fqns.nil?
      end
    else
      result.concat api_map.get_instance_methods(type)
    end
  elsif signature.start_with?('@')
    result.concat get_instance_variables_at(index)
  elsif phrase.start_with?('$')
    result.concat api_map.get_global_variables
  elsif phrase.include?('::')
    parts = phrase.split('::', -1)
    ns = parts[0..-2].join('::')
    if parts.last.include?('.')
      ns = parts[0..-2].join('::') + '::' + parts.last[0..parts.last.index('.')-1]
      result = api_map.get_methods(ns)
    else
      result = api_map.namespaces_in(ns, namespace)
    end
  else
    current_namespace = namespace_at(index)
    parts = current_namespace.to_s.split('::')
    result += get_snippets_at(index) if with_snippets
    result += get_local_variables_and_methods_at(index)
    result += ApiMap.get_keywords
    while parts.length > 0
      ns = parts.join('::')
      result += api_map.namespaces_in(ns, namespace)
      parts.pop
    end
    result += api_map.namespaces_in('')
    result += api_map.get_instance_methods('Kernel')
    #unless @filename.nil? or @api_map.yardoc_has_file?(@filename)

    #  m = @code.match(/# +@bind \[([a-z0-9_:]*)/i)

    #  unless m.nil?

    #    @api_map.get_instance_methods(m[1])

    #  end

    #end

  end
  result = reduce_starting_with(result, word_at(index)) if filtered
  result.uniq{|s| s.path}.sort{|a,b| a.label <=> b.label}
end

#suggest_for_signature_at(index) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 373

def suggest_for_signature_at index
  result = []
  type = infer_signature_at(index)
  result.concat api_map.get_instance_methods(type) unless type.nil?
  result
end

#tree_at(index) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 83

def tree_at(index)
  arr = []
  arr.push @node
  inner_node_at(index, @node, arr)
  arr
end

#word_at(index) ⇒ Object 



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# File 'lib/solargraph/code_map.rb', line 167

def word_at index
  word = ''
  cursor = index - 1
  while cursor > -1
    char = @code[cursor, 1]
    break if char.nil? or char == ''
    break unless char.match(/[a-z0-9_]/i)
    word = char + word
    cursor -= 1
  end
  word
end