Class: LangSrv

Inherits:
Object
  • Object
show all
Defined in:
lib/vimamsa/langservp.rb

Constant Summary collapse

@@languages = 
{}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(lang) ⇒ LangSrv

Returns a new instance of LangSrv.



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# File 'lib/vimamsa/langservp.rb', line 20

def initialize(lang)
  @error = true

  # Use LSP server specified by user if available
  @lang = lang

  lspconf = nil
  ret = cnf.lsp.server?.find { |k, v| v[:languages].include?(@lang) }
  lspconf = ret[1] unless ret.nil?

  if !lspconf.nil?
    error = false
    begin
      @io = IO.popen(lspconf[:command], "r+")
    rescue Errno::ENOENT => e
      pp e
      error = true
    rescue StandardError => e
      debug "StandardError @io = IO.popen(lspconf[:command] ...", 2
      pp e
      error = true
    end
    if error or @io.nil?
      message("Could not start lsp server #{lspconf[:name]}")
      error = true
      return nil
    end
  else
    return nil
  end
  @writer = LSP::Transport::Io::Writer.new(@io)
  @reader = LSP::Transport::Io::Reader.new(@io)
  @id = 0

  wf = []
  for c in conf(:workspace_folders)
    wf << LSP::Interface::WorkspaceFolder.new(uri: c[:uri], name: c[:name])
  end
  debug "WORKSPACE FOLDERS", 2
  debug wf.inspect, 2

  pid = Process.pid

  if lspconf[:name] == "phpactor"
    initp = LSP::Interface::InitializeParams.new(
      process_id: pid,
      root_uri: lspconf[:rooturi],
      workspace_folders: wf,
      capabilities: { 'workspace': { 'workspaceFolders': true } },
    )
  else
    initp = LSP::Interface::InitializeParams.new(
      process_id: pid,
      root_uri: "null",
      workspace_folders: wf,
      capabilities: { 'workspace': { 'workspaceFolders': true } },
    )
  end
  @resp = {}

  @writer.write(id: new_id, params: initp, method: "initialize")

  @lst = Thread.new {
    @reader.read do |r|
      @resp[r[:id]] = r
      pp r
      # exit
    end
  }
  @error = false
end

Instance Attribute Details

#error ⇒ Object

Returns the value of attribute error.



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# File 'lib/vimamsa/langservp.rb', line 6

def error
  @error
end

Class Method Details

.get(lang) ⇒ Object 



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# File 'lib/vimamsa/langservp.rb', line 8

def self.get(lang)
  if @@languages[lang].nil?
    @@languages[lang] = LangSrv.new(lang)
    @@languages[lang] = nil if @@languages[lang].error
  end
  return @@languages[lang]
end

Instance Method Details

#add_workspaces ⇒ Object

TODO



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# File 'lib/vimamsa/langservp.rb', line 133

def add_workspaces() # TODO
  # https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#workspace_workspaceFolders
  debug "Add workspaces", 2
  a = [LSP::Interface::WorkspaceFolder.new(uri: "file:///...", name: "vimamsa")]
  id = new_id
  # @writer.write(id: id, params: a, method: "textDocument/definition")
  # @writer.write(id: id, params: a, method: "workspace/workspaceFolders")
  @writer.write(id: id, params: a, method: "workspace/didChangeWorkspaceFolders")
  r = wait_for_response(id)
  pp r
end

#get_definition(fpuri, lpos, cpos) ⇒ Object 



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# File 'lib/vimamsa/langservp.rb', line 150

def get_definition(fpuri, lpos, cpos)
  a = LSP::Interface::DefinitionParams.new(
    position: LSP::Interface::Position.new(line: lpos, character: cpos),
    text_document: LSP::Interface::TextDocumentIdentifier.new(uri: fpuri),
  )
  id = new_id
  pp a
  @writer.write(id: id, params: a, method: "textDocument/definition")
  r = wait_for_response(id)
  return nil if r.nil?
  # Ripl.start :binding => binding
  pp r
  line = HSafe.new(r)[:result][0][:range][:start][:line].val
  uri = HSafe.new(r)[:result][0][:uri].val

  if !uri.nil? and !line.nil?
    puts "LINE:" + line.to_s
    puts "URI:" + uri
    fpath = URI.parse(uri).path
    line = line + 1
    return [fpath, line]
  end

  return nil
end

#handle_delta(delta, fpath, version) ⇒ Object 



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# File 'lib/vimamsa/langservp.rb', line 92

def handle_delta(delta, fpath, version)
  fpuri = URI.join("file:///", fpath).to_s

  # delta[0]: char position
  # delta[1]: INSERT or DELETE
  # delta[2]: number of chars affected
  # delta[3]: text to add in case of insert

  changes = nil
  if delta[1] == INSERT
    changes = [{ 'rangeLength': 0, 'range': { 'start': { 'line': delta[4][0], 'character': delta[4][1] }, 'end': { 'line': delta[4][0], 'character': delta[4][1] } }, 'text': delta[3] }]
  elsif delta[1] == DELETE
    changes = [{ 'rangeLength': delta[2], 'range': { 'start': { 'line': delta[4][0], 'character': delta[4][1] }, 'end': { 'line': delta[5][0], 'character': delta[5][1] } }, 'text': "" }]
  end
  debug changes.inspect, 2

  if !changes.nil?
    a = LSP::Interface::DidChangeTextDocumentParams.new(
      text_document: LSP::Interface::VersionedTextDocumentIdentifier.new(uri: fpuri, version: version),
      content_changes: changes,
    )
    id = new_id
    pp a
    @writer.write(id: id, params: a, method: "textDocument/didChange")
  end
end

#handle_responses ⇒ Object 



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# File 'lib/vimamsa/langservp.rb', line 145

def handle_responses()
  #TODO
  # r = @resp.delete_at(0)
end

#new_id ⇒ Object 



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# File 'lib/vimamsa/langservp.rb', line 16

def new_id()
  return @id += 1
end

#open_file(fp, fc = nil) ⇒ Object 



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# File 'lib/vimamsa/langservp.rb', line 176

def open_file(fp, fc = nil)
  debug "open_file", 2
  fc = IO.read(fp) if fc.nil?

  encoded_filepath = URI.encode_www_form_component(fp)
  fpuri = URI.parse("file://#{encoded_filepath}")

  a = LSP::Interface::DidOpenTextDocumentParams.new(
    text_document: LSP::Interface::TextDocumentItem.new(
      uri: fpuri,
      text: fc,
      language_id: "c++",
      version: 1,
    ),
  )

  @writer.write(method: "textDocument/didOpen", params: a)
end

#wait_for_response(id) ⇒ Object 



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# File 'lib/vimamsa/langservp.rb', line 119

def wait_for_response(id)
  t = Time.now
  debug "Waiting for response id:#{id}"
  while @resp[id].nil?
    sleep 0.03
    if Time.now - t > 5
      debug "Timeout LSP call id:#{id}"
      return nil
    end
  end
  debug "End waiting id:#{id}"
  return @resp[id]
end