[READY] Implement LSP type/call hierarchies as actual hierarchies

docs/openapi.yml

@@ -190,7 +190,61 @@ definitions:
 
  additionalProperties:
  $ref: "#/definitions/FileData"
-
+ Hierarchy:
+ type: object
+ required:
+ - kind
+ - locations
+ - name
+ description: |-
+ An object returned, in a list, as a response to hierarchy requests.
+ The object may contain additional properties, which are used to identify
+ the hierarchy tree node, by the subservers.
+ properties:
+ kind:
+ type: string
+ enum:
+ - File
+ - Module
+ - Namespace
+ - Package
+ - Class
+ - Method
+ - Property
+ - Field
+ - Constructor
+ - Enum
+ - Interface
+ - Function
+ - Variable
+ - Constant
+ - String
+ - Number
+ - Boolean
+ - Array
+ - Object
+ - Key
+ - Null
+ - EnumMember
+ - Struct
+ - Event
+ - Operator
+ - TypeParameter
+ locations:
+ type: array
+ items:
+ $ref: "#/defintions/Location"
+ name:
+ type: string
+ description: |-
+ The name of the symbol represented by the hierarchy item.
+ root_location:
+ type: object
+ description: |-
+ In call hierarchies, it is useful to differentiate between the call
+ site (which end up in the `locations` property) and the calling
+ function. This property, if present, represents the latter.
+ $ref: "#/definitions/Location"
  # Due to the way the API combines keys at the top level, we are not able to
  # compose this item per-request. So this definition must be copy-pasted for
  # some requests.
@@ -368,6 +422,22 @@ definitions:
  If present, this is a single *GoTo response* and this value
  contains the absolute path of the buffer containing the
  target location (identified in `line_num` and `column_num`).
+ kind:
+ type: string
+ description: |-
+ If present, this is a *Hierarchy response* and this value
+ describes the kind of symbol a node in the call/type hierarchy
+ tree is referring to.
+ hierarchy details:
+ $ref: "#/definitions/Hierarchy"
+ locations:
+ type: array
+ description: |-
+ If present, this is a *Hierarchy response* and this value
+ contains a list of locations that a node in the call/type
+ hierarchy tree is referring to.
+ hierarchy details:
+ $ref: "#/definitions/Hierarchy"
  line_num:
  $ref: "#/definitions/LineNumber"
  column_num:
@@ -886,6 +956,21 @@ paths:
  messages are typically multiple lines (such as the documentation and
  signature for a method) and are best displayed in a panel or preview
  area (or equivalent).
+ - A *Hierarchy* response. This is identified where the type of the
+ response is a list of objects containing `kind` and `locations`
+ properties.
+ Hierarchy requests work similarly to those in the LSP specification.
+ If a completer supports call/type hierarchies, the initial request
+ should be sent through `TypeHierarchy`/`CallHierarchy` subcommand.
+ Resolving any item in the hierarchy tree is done by subsequent
+ `ResolveCallHierarchyItem` and `ResolveTypeHierarchyItem` requests.
+ When resolving a hierarchy item, the arguments following
+ the subcommand name are the item being resolved and the direction in
+ which the item should be resolved.
+ For call hierarchies, the directions are `incoming` and `outgoing`.
+ For type hierarchies, the directions are `subtypes` and `supertypes`.
+ Note that, except for the root node of the hierarchy, resolving an
+ item in both directions is discouraged.
  - A *GoTo* response. This is identified where the response type cannot
  be determined by any of the above methods. A GoTo response may contain
  either a single location (e.g. for `GoToDeclaration`), or a list of

update_api_docs.py

@@ -1,10 +1,5 @@
 #!/usr/bin/env python3
 
-from __future__ import print_function
-from __future__ import division
-from __future__ import unicode_literals
-from __future__ import absolute_import
-
 import os
 import platform
 import sys

ycmd/completers/java/java_completer.py

@@ -650,3 +650,18 @@ def GetServerName( self ):
 
  def GetCommandLine( self ):
  return self._command
+
+
+ def Hierarchy( self, request_data, args ):
+ # JDT.LS is a special snowflake and needs special snowflake treatement
+ # See: https://github.com/eclipse-jdtls/eclipse.jdt.ls/issues/3184
+ result = super().Hierarchy( request_data, args )
+ preparation_item, direction, kind = args
+ if kind == 'call' and direction == 'incoming':
+ for item in result:
+ # The base class does almost the same,
+ # but uses `selectionRange` instead of `range`.
+ item[ 'root_location' ] = responses.BuildGoToResponseFromLocation(
+ *language_server_completer._LspLocationToLocationAndDescription(
+ request_data, item[ 'from' ] ) )
+ return result

ycmd/completers/language_server/language_server_completer.py

@@ -1685,7 +1685,7 @@ def GetDetailedDiagnostic( self, request_data ):
  message = diagnostic[ 'message' ]
  try:
  code = diagnostic[ 'code' ]
- message += f' [{ code }]'
+ message += f' [{ code }]' # noqa
  except KeyError:
  pass
 
@@ -1785,6 +1785,18 @@ def GetSubcommandsMap( self ):
  lambda self, request_data, args: self.GetType( request_data )
  )
 
+ if ( self._server_capabilities and
+ _IsCapabilityProvided( self._server_capabilities,
+ 'typeHierarchyProvider' ) ):
+ commands[ 'TypeHierarchy' ] = (
+ lambda self, request_data, args:
+ self.InitialHierarchy( request_data, [ 'type' ] )
+ )
+ commands[ 'ResolveTypeHierarchyItem' ] = (
+ lambda self, request_data, args:
+ self.Hierarchy( request_data, [ *args, 'type' ] )
+ )
+
  if ( self._server_capabilities and
  _IsCapabilityProvided( self._server_capabilities,
  'callHierarchyProvider' ) ):
@@ -1796,6 +1808,14 @@ def GetSubcommandsMap( self ):
  lambda self, request_data, args:
  self.CallHierarchy( request_data, [ 'incoming' ] )
  )
+ commands[ 'CallHierarchy' ] = (
+ lambda self, request_data, args:
+ self.InitialHierarchy( request_data, [ 'call' ] )
+ )
+ commands[ 'ResolveCallHierarchyItem' ] = (
+ lambda self, request_data, args:
+ self.Hierarchy( request_data, [ *args, 'call' ] )
+ )
 
  commands.update( self.GetCustomSubcommands() )
 
@@ -2643,14 +2663,105 @@ def GoToDocumentOutline( self, request_data ):
  return _SymbolInfoListToGoTo( request_data, result )
 
 
+ def InitialHierarchy( self, request_data, args ):
+ if not self.ServerIsReady():
+ raise RuntimeError( 'Server is initializing. Please wait.' )
+
+ kind = args[ 0 ]
+
+ self._UpdateServerWithFileContents( request_data )
+ request_id = self.GetConnection().NextRequestId()
+ message = lsp.PrepareHierarchy( request_id, request_data, kind.title() )
+ prepare_response = self.GetConnection().GetResponse(
+ request_id,
+ message,
+ REQUEST_TIMEOUT_COMMAND )
+ preparation_item = prepare_response.get( 'result' ) or []
+ if not preparation_item:
+ raise RuntimeError( f'No { kind } hierarchy found.' )
+
+ assert len( preparation_item ) == 1, (
+ 'Not available: Multiple hierarchies were received, '
+ 'this is not currently supported.' )
+
+ preparation_item[ 0 ][ 'locations' ] = [
+ responses.BuildGoToResponseFromLocation(
+ *_LspLocationToLocationAndDescription( request_data,
+ location,
+ 'selectionRange' ) )
+ for location in preparation_item ]
+ kind_string = lsp.SYMBOL_KIND[ preparation_item[ 0 ][ 'kind' ] ]
+ preparation_item[ 0 ][ 'kind' ] = kind_string
+ return preparation_item
+
+
+ def Hierarchy( self, request_data, args ):
+ if not self.ServerIsReady():
+ raise RuntimeError( 'Server is initializing. Please wait.' )
+
+ preparation_item, direction, kind = args
+
+ if item := ( preparation_item.get( 'from' ) or
+ preparation_item.get( 'to' ) ):
+ preparation_item = item
+ else:
+ del preparation_item[ 'locations' ]
+ kind_number = lsp.SYMBOL_KIND.index( preparation_item[ 'kind' ] )
+ preparation_item[ 'kind' ] = kind_number
+
+ if kind == 'call':
+ direction += 'Calls'
+ self._UpdateServerWithFileContents( request_data )
+ request_id = self.GetConnection().NextRequestId()
+ message = lsp.Hierarchy( request_id, kind, direction, preparation_item )
+ response = self.GetConnection().GetResponse( request_id,
+ message,
+ REQUEST_TIMEOUT_COMMAND )
+
+ result = response.get( 'result' )
+ if result:
+ for item in result:
+ if kind == 'call':
+ name_and_kind_key = 'to' if direction == 'outgoingCalls' else 'from'
+ hierarchy_item = item[ name_and_kind_key ]
+ kind_string = lsp.SYMBOL_KIND[ hierarchy_item[ 'kind' ] ]
+ item[ 'kind' ] = kind_string
+ item[ 'name' ] = hierarchy_item[ 'name' ]
+ lsp_locations = [ {
+ 'uri': hierarchy_item[ 'uri' ],
+ 'range': r }
+ for r in item[ 'fromRanges' ] ]
+ item[ 'locations' ] = [
+ responses.BuildGoToResponseFromLocation(
+ *_LspLocationToLocationAndDescription( request_data, location ) )
+ for location in lsp_locations ]
+
+ if direction == 'incomingCalls':
+ item[ 'root_location' ] = responses.BuildGoToResponseFromLocation(
+ *_LspLocationToLocationAndDescription( request_data,
+ hierarchy_item,
+ 'selectionRange' ) )
+ else:
+ item[ 'kind' ] = lsp.SYMBOL_KIND[ item[ 'kind' ] ]
+ item[ 'locations' ] = [
+ responses.BuildGoToResponseFromLocation(
+ *_LspLocationToLocationAndDescription( request_data, location ) )
+ for location in [ item ] ]
+ return result
+ if kind == 'call':
+ raise RuntimeError(
+ f'No { direction.rstrip( "Calls" ) } { kind }s found.' )
+ else:
+ raise RuntimeError( f'No { direction } found.' )
+
 
  def CallHierarchy( self, request_data, args ):
  if not self.ServerIsReady():
  raise RuntimeError( 'Server is initializing. Please wait.' )
 
  self._UpdateServerWithFileContents( request_data )
  request_id = self.GetConnection().NextRequestId()
- message = lsp.PrepareCallHierarchy( request_id, request_data )
+ message = lsp.PrepareHierarchy( request_id, request_data, 'Call' )
  prepare_response = self.GetConnection().GetResponse(
  request_id,
  message,
@@ -2666,7 +2777,10 @@ def CallHierarchy( self, request_data, args ):
  preparation_item = preparation_item[ 0 ]
 
  request_id = self.GetConnection().NextRequestId()
- message = lsp.CallHierarchy( request_id, args[ 0 ], preparation_item )
+ message = lsp.Hierarchy( request_id,
+ 'call',
+ args[ 0 ] + 'Calls',
+ preparation_item )
  response = self.GetConnection().GetResponse( request_id,
  message,
  REQUEST_TIMEOUT_COMMAND )
@@ -3282,7 +3396,9 @@ def BuildGoToLocationFromSymbol( symbol ):
  return locations
 
 
-def _LspLocationToLocationAndDescription( request_data, location ):
+def _LspLocationToLocationAndDescription( request_data,
+ location,
+ range_property = 'range' ):
  """Convert a LSP Location to a ycmd location."""
  try:
  filename = lsp.UriToFilePath( location[ 'uri' ] )
@@ -3299,9 +3415,10 @@ def _LspLocationToLocationAndDescription( request_data, location ):
  'GoTo location' )
  file_contents = []
 
+ range = location[ range_property ]
  return _BuildLocationAndDescription( filename,
  file_contents,
- location[ 'range' ][ 'start' ] )
+ range[ 'start' ] )
 
 
 def _LspToYcmdLocation( file_contents, location ):

ycmd/completers/language_server/language_server_protocol.py

@@ -633,8 +633,8 @@ def Position( line_num, line_value, column_codepoint ):
  }
 
 
-def PrepareCallHierarchy( request_id, request_data ):
- return BuildRequest( request_id, 'textDocument/prepareCallHierarchy', {
+def PrepareHierarchy( request_id, request_data, kind ):
+ return BuildRequest( request_id, f'textDocument/prepare{ kind }Hierarchy', {
  'textDocument': {
  'uri': FilePathToUri( request_data[ 'filepath' ] ),
  },
@@ -644,8 +644,8 @@ def PrepareCallHierarchy( request_id, request_data ):
  } )
 
 
-def CallHierarchy( request_id, direction, item ):
- return BuildRequest( request_id, f'callHierarchy/{ direction }Calls', {
+def Hierarchy( request_id, kind, direction, item ):
+ return BuildRequest( request_id, f'{ kind }Hierarchy/{ direction }', {
  'item': item
  } )