Class: RuVim::Dispatcher

Inherits:
Object
  • Object
show all
Defined in:
lib/ruvim/dispatcher.rb

Defined Under Namespace

Classes: ExCall

Instance Method Summary collapse

Constructor Details

#initialize(command_registry: CommandRegistry.instance, ex_registry: ExCommandRegistry.instance, command_host: GlobalCommands.instance) ⇒ Dispatcher

Returns a new instance of Dispatcher.



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# File 'lib/ruvim/dispatcher.rb', line 9

def initialize(command_registry: CommandRegistry.instance, ex_registry: ExCommandRegistry.instance, command_host: GlobalCommands.instance)
  @command_registry = command_registry
  @ex_registry = ex_registry
  @command_host = command_host
end

Instance Method Details

#dispatch(editor, invocation) ⇒ Object 



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# File 'lib/ruvim/dispatcher.rb', line 15

def dispatch(editor, invocation)
  spec = @command_registry.fetch(invocation.id)
  ctx = Context.new(editor:, invocation:)
  @command_host.call(spec.call, ctx, argv: invocation.argv, kwargs: invocation.kwargs, bang: invocation.bang, count: invocation.count)
rescue StandardError => e
  editor.echo_error("Error: #{e.message}")
end

#dispatch_ex(editor, line) ⇒ Object 



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# File 'lib/ruvim/dispatcher.rb', line 23

def dispatch_ex(editor, line)
  raw = line.strip
  if raw.start_with?("!")
    command = raw[1..].strip
    invocation = CommandInvocation.new(id: "__shell__", argv: [command])
    ctx = Context.new(editor:, invocation:)
    @command_host.ex_shell(ctx, command:)
    editor.enter_normal_mode
    return
  end

  # Parse range prefix
  range_result = parse_range(raw, editor)
  rest = range_result ? range_result[:rest] : raw

  # Try substitute on rest
  if (sub = parse_substitute(rest))
    kwargs = sub.merge(
      range_start: range_result&.dig(:range_start),
      range_end: range_result&.dig(:range_end)
    )
    invocation = CommandInvocation.new(id: "__substitute__", kwargs:)
    ctx = Context.new(editor:, invocation:)
    @command_host.ex_substitute(ctx, **kwargs)
    editor.enter_normal_mode
    return
  end

  parsed = parse_ex(rest)
  return if parsed.nil?

  spec = @ex_registry.fetch(parsed.name)
  argv = parsed.argv
  if spec.raw_args
    # Re-extract raw text after command name (preserving shell quoting)
    raw_rest = rest.strip.sub(/\A\S+\s*/, "")
    argv = raw_rest.empty? ? [] : [raw_rest]
  end
  validate_ex_args!(spec, argv, parsed.bang)
  invocation = CommandInvocation.new(id: spec.name, argv: argv, bang: parsed.bang)
  ctx = Context.new(editor:, invocation:)
  range_kwargs = {}
  if range_result
    range_kwargs[:range_start] = range_result[:range_start]
    range_kwargs[:range_end] = range_result[:range_end]
  end
  @command_host.call(spec.call, ctx, argv: argv, bang: parsed.bang, count: 1, kwargs: range_kwargs)
rescue StandardError => e
  editor.echo_error("Error: #{e.message}")
ensure
  editor.leave_command_line if editor.mode == :command_line
end

#parse_address(str, pos, editor) ⇒ Object

Parse an address at position pos in str. Returns [resolved_line_number, new_pos] or nil.



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# File 'lib/ruvim/dispatcher.rb', line 117

def parse_address(str, pos, editor)
  return nil if pos >= str.length

  ch = str[pos]
  base = nil
  new_pos = pos

  case ch
  when /\d/
    # Numeric address
    m = str[pos..].match(/\A(\d+)/)
    return nil unless m
    base = m[1].to_i - 1 # convert 1-based to 0-based
    new_pos = pos + m[0].length
  when "."
    base = editor.current_window.cursor_y
    new_pos = pos + 1
  when "$"
    base = editor.current_buffer.line_count - 1
    new_pos = pos + 1
  when "'"
    # Mark address
    mark_ch = str[pos + 1]
    return nil unless mark_ch
    if mark_ch == "<" || mark_ch == ">"
      sel = editor.visual_selection
      if sel
        base = mark_ch == "<" ? sel[:start_row] : sel[:end_row]
      else
        return nil
      end
    else
      loc = editor.mark_location(mark_ch)
      return nil unless loc
      base = loc[:row]
    end
    new_pos = pos + 2
  when "+", "-"
    # Relative offset with implicit current line
    base = editor.current_window.cursor_y
    # Don't advance new_pos — the offset parsing below will handle +/-
  else
    return nil
  end

  # Parse trailing +N / -N offsets
  while new_pos < str.length
    offset_ch = str[new_pos]
    if offset_ch == "+"
      m = str[new_pos + 1..].to_s.match(/\A(\d+)/)
      if m
        base += m[1].to_i
        new_pos += 1 + m[0].length
      else
        base += 1
        new_pos += 1
      end
    elsif offset_ch == "-"
      m = str[new_pos + 1..].to_s.match(/\A(\d+)/)
      if m
        base -= m[1].to_i
        new_pos += 1 + m[0].length
      else
        base -= 1
        new_pos += 1
      end
    else
      break
    end
  end

  # Clamp to valid range
  max_line = editor.current_buffer.line_count - 1
  base = [[base, 0].max, max_line].min

  [base, new_pos]
end

#parse_ex(line) ⇒ Object 



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# File 'lib/ruvim/dispatcher.rb', line 76

def parse_ex(line)
  raw = line.strip
  return nil if raw.empty?

  tokens = Shellwords.shellsplit(raw)
  return nil if tokens.empty?

  head = tokens.shift
  bang = head.end_with?("!")
  name = bang ? head[0...-1] : head
  ExCall.new(name:, argv: tokens, bang:)
rescue ArgumentError => e
  raise RuVim::CommandError, "Parse error: #{e.message}"
end

#parse_range(raw, editor) ⇒ Object

Parse a range from the beginning of raw. Returns range_end:, rest: or nil.



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# File 'lib/ruvim/dispatcher.rb', line 197

def parse_range(raw, editor)
  str = raw
  return nil if str.empty?

  # % = whole file
  if str[0] == "%"
    max_line = editor.current_buffer.line_count - 1
    rest = str[1..].to_s
    return { range_start: 0, range_end: max_line, rest: rest }
  end

  # Try first address
  addr1 = parse_address(str, 0, editor)
  return nil unless addr1

  line1, pos = addr1

  if pos < str.length && str[pos] == ","
    # addr,addr range
    addr2 = parse_address(str, pos + 1, editor)
    if addr2
      line2, pos2 = addr2
      return { range_start: line1, range_end: line2, rest: str[pos2..].to_s }
    end
  end

  # Single address
  { range_start: line1, range_end: line1, rest: str[pos..].to_s }
end

#parse_substitute(line) ⇒ Object

Parse a substitute command: s/pat/repl/flags Returns replacement:, flags_str: or nil



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# File 'lib/ruvim/dispatcher.rb', line 93

def parse_substitute(line)
  raw = line.strip
  return nil unless raw.match?(/\As[^a-zA-Z]/)
  return nil if raw.length < 2

  delim = raw[1]
  return nil if delim.nil? || delim =~ /\s/
  i = 2
  pat, i = parse_delimited_segment(raw, i, delim)
  return nil unless pat
  rep, i = parse_delimited_segment(raw, i, delim)
  return nil unless rep
  flags_str = raw[i..].to_s
  {
    pattern: pat,
    replacement: rep,
    flags_str: flags_str
  }
rescue StandardError
  nil
end