Draft: LSP Implementation

addons/pronto/helpers/EditorIcon.gd

@@ -5,8 +5,9 @@ class_name EditorIcon
 @export var name: String:
 	set(n):
 		name = n
-		_tex = Engine.get_main_loop().get_root().get_theme_icon(name, &"EditorIcons")
-		emit_changed()
+		if Engine.get_main_loop() != null:
+			_tex = Engine.get_main_loop().get_root().get_theme_icon(name, &"EditorIcons")
+			emit_changed()
 
 var _tex: ImageTexture
 

addons/pronto/helpers/LanguageClient.gd

@@ -0,0 +1,106 @@
+@tool
+extends Node
+class_name LanguageClient
+
+signal on_notification(data: Dictionary)
+signal on_response(data: Dictionary)
+
+func _ready():
+	socket = StreamPeerTCP.new()
+	socket.connect_to_host('127.0.0.1', 6005)
+	socket.poll()
+	socket.set_no_delay(true)
+
+	send_request('initialize', {
+		'processId': null,
+		'clientInfo': {'name': 'pronto'},
+		'rootUri': 'file://' + ProjectSettings.globalize_path("res://"),
+		'capabilities': {
+			'textDocument': {'hover': {}, 'synchronization': {'dynamicRegistration': true}},
+			'workspace': {'applyEdit': true, 'workspaceEdit': {'documentChanges': true}},
+		},
+	}, func (r): pass)
+
+func script_path(script: Script):
+	return "file://" + ProjectSettings.globalize_path(script.resource_path)
+
+func _exit_tree():
+	socket.disconnect_from_host()
+
+func _process(delta):
+	if Engine.is_editor_hint():
+		return
+	socket.poll()
+	var m = receive_message()
+	if m != null:
+		if "id" in m:
+			_waiting_handlers[int(m["id"])].call(m["result"])
+			_waiting_handlers.erase(int(m["id"]))
+		else:
+			on_notification.emit(m)
+
+func completion(script: Script, line: int, character: int, cb: Callable):
+	send_request('textDocument/completion', {
+		'textDocument': {'uri': script_path(script)}, 'position': {'line': line, 'character': character}
+	}, cb)
+
+var _waiting_handlers = {}
+var _document_versions = {}
+
+func did_change(script: Script):
+	if not script.resource_path in _document_versions:
+		_document_versions[script.resource_path] = 1
+	else:
+		_document_versions[script.resource_path] += 1
+	send_notification("textDocument/didChange", {
+		"textDocument": {"uri": script_path(script), "version": _document_versions[script.resource_path]},
+		"contentChanges": {"text": script.source_code}
+	})
+
+func did_open(script: Script):
+	send_notification("textDocument/didOpen", {'textDocument': {
+		'uri': script_path(script),
+		'text': script.source_code
+	}})
+
+func send_notification(notification: String, params: Dictionary):
+	send({'jsonrpc': '2.0', 'method': notification, 'params': params})
+
+func send_request(request: String, params: Dictionary, cb: Callable):
+	var my_id = current_id
+	current_id = current_id + 1
+	_waiting_handlers[my_id] = cb
+	send({'jsonrpc': '2.0', 'id': my_id, 'method': request, 'params': params})
+
+func send(obj: Dictionary):
+	print("> " + str(obj))
+	var data = JSON.stringify(obj).to_utf8_buffer()
+	socket.put_data('Content-Length: {0}\r\n\r\n'.format([data.size()]).to_utf8_buffer())
+	socket.put_data(data)
+
+var current_id = 1
+var socket: StreamPeerTCP
+var buffer = ""
+
+func receive_message():
+	var available = socket.get_available_bytes()
+	buffer += socket.get_string(available)
+
+	var header_end = buffer.find("\r\n\r\n")
+	if header_end >= 0:
+		var headers = {}
+		for pair in Array(buffer.substr(0, header_end).split("\r\n")).map(func (header): return header.split(': ')):
+			assert(pair.size() == 2)
+			headers[pair[0].to_lower()] = pair[1]
+		assert("content-length" in headers)
+
+		var json_length = int(headers["content-length"])
+		var total_length = header_end + 4 + json_length
+		if buffer.length() < total_length:
+			return null
+		var json = buffer.substr(header_end + 4, json_length)
+		var data = JSON.parse_string(json)
+		buffer = buffer.substr(total_length)
+		return data
+	else:
+		return null

addons/pronto/helpers/Utils.gd

@@ -180,6 +180,8 @@ static func global_rect_of(node: Node):
 	return Rect2(node.global_position, Vector2.ZERO)
 
 static func fix_minimum_size(n: Control):
+	if G.at("_pronto_editor_plugin") == null:
+		return
 	n.custom_minimum_size *= G.at("_pronto_editor_plugin").get_editor_interface().get_editor_scale()
 
 static func log(s):

addons/pronto/pronto.gd

@@ -60,6 +60,8 @@ func _edit(object):
 	if _is_editing_behavior():
 		edited_object.deselected()
 
+	# get_editor_interface().edit_script(load("res://examples/platformer.tscn::GDScript_tb7ap"))
+
 	edited_object = object
 	if _is_editing_behavior() and edited_object is Node:
 		show_signals(edited_object)

addons/pronto/signal_connecting/expression_edit.gd

@@ -21,6 +21,10 @@ signal text_changed()
 @export var min_width = 80
 @export var max_width = 260
 
+var edited_script
+
+var _LanguageClient: LanguageClient
+
 func _input(event):
 	if not $Expression.has_focus():
 		return
@@ -37,8 +41,27 @@ func _ready():
 	if owner != self:
 		fake_a_godot_highlighter()
 		resize()
+		add_child(LanguageClient.new())
+
+		edited_script = GDScript.new()
+		edited_script.source_code = 'extends Object'
+		edited_script.reload()
+		edited_script.resource_path = "res://test-script.gd"
+		ResourceSaver.save(edited_script)
+
+		# TODO
+		if not Engine.is_editor_hint():
+			# TODO move to autoload
+			_LanguageClient = LanguageClient.new()
+			add_child(_LanguageClient)
+			$Expression.code_completion_enabled = true
+			$Expression.code_completion_prefixes = ['.', '/'] # TODO
+			$Expression.language_client = _LanguageClient
+			$Expression.edited_script = edited_script
 
 func fake_a_godot_highlighter():
+	if G.at("_pronto_editor_plugin") == null:
+		return
 	var s = G.at("_pronto_editor_plugin").get_editor_interface().get_editor_settings()
 	var h = CodeHighlighter.new()
 	h.number_color = s.get("text_editor/theme/highlighting/number_color")

addons/pronto/signal_connecting/expression_edit.tscn

@@ -1,12 +1,13 @@
-[gd_scene load_steps=6 format=3 uid="uid://d1jujxfamsekk"]
+[gd_scene load_steps=7 format=3 uid="uid://d1jujxfamsekk"]
 
 [ext_resource type="Script" path="res://addons/pronto/signal_connecting/expression_edit.gd" id="1_lndi8"]
 [ext_resource type="Script" path="res://addons/pronto/helpers/EditorIcon.gd" id="2_au0w8"]
+[ext_resource type="Script" path="res://addons/pronto/signal_connecting/lsp_edit.gd" id="2_lla62"]
 
 [sub_resource type="SystemFont" id="SystemFont_xd5ge"]
 font_names = PackedStringArray("Monospace")
 
-[sub_resource type="CodeHighlighter" id="CodeHighlighter_yn0mp"]
+[sub_resource type="CodeHighlighter" id="CodeHighlighter_tp1bn"]
 number_color = Color(0, 0.55, 0.28, 1)
 symbol_color = Color(0, 0, 0.61, 1)
 function_color = Color(0, 0.225, 0.9, 1)
@@ -63,10 +64,12 @@ script = ExtResource("2_au0w8")
 name = "DebugStep"
 
 [node name="expression_edit" type="HBoxContainer"]
-custom_minimum_size = Vector2(0, 43)
+custom_minimum_size = Vector2(180, 32)
 anchors_preset = 15
 anchor_right = 1.0
 anchor_bottom = 1.0
+offset_right = -972.0
+offset_bottom = -614.0
 grow_horizontal = 2
 grow_vertical = 2
 size_flags_horizontal = 0
@@ -80,10 +83,13 @@ size_flags_horizontal = 3
 theme_override_fonts/font = SubResource("SystemFont_xd5ge")
 placeholder_text = "Expression..."
 draw_tabs = true
-syntax_highlighter = SubResource("CodeHighlighter_yn0mp")
+syntax_highlighter = SubResource("CodeHighlighter_tp1bn")
 scroll_fit_content_height = true
+code_completion_enabled = true
+code_completion_prefixes = Array[String]([".", "/"])
 indent_automatic = true
 auto_brace_completion_enabled = true
+script = ExtResource("2_lla62")
 
 [node name="OpenFile" type="Button" parent="."]
 layout_mode = 2

addons/pronto/signal_connecting/lsp_edit.gd

@@ -0,0 +1,24 @@
+@tool
+extends CodeEdit
+
+var language_client: LanguageClient
+var edited_script: Script:
+	set(s):
+		edited_script = s
+		language_client.did_open(s)
+
+func _ready():
+	text_changed.connect(on_text_changed)
+
+func on_text_changed():
+	edited_script.source_code = text
+	language_client.did_change(edited_script)
+
+func _request_code_completion(force):
+	print([get_caret_line(), get_caret_column()])
+	language_client.completion(edited_script, get_caret_line(), get_caret_column(), func (entries):
+		for entry in entries:
+			# print(entry)
+			pass
+			# add_code_completion_option(CodeEdit.KIND_MEMBER)
+	)

examples/platformer/platformer.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=14 format=3 uid="uid://88vl7ypda1n1"]
+[gd_scene load_steps=15 format=3 uid="uid://88vl7ypda1n1"]
 
 [ext_resource type="Script" path="res://addons/pronto/behaviors/Placeholder.gd" id="1_rpa0n"]
 [ext_resource type="Script" path="res://addons/pronto/behaviors/Move.gd" id="2_pahj6"]
@@ -54,6 +54,13 @@ arguments = ["dir"]
 only_if = ""
 expression = ""
 
+[sub_resource type="GDScript" id="GDScript_tb7ap"]
+script/source = "extends Object
+
+func 
+2 + 3
+"
+
 [node name="platformer" type="Node2D"]
 
 [node name="CharacterBody2D" type="CharacterBody2D" parent="."]
@@ -141,3 +148,4 @@ position = Vector2(231, 530)
 position = Vector2(1, 0)
 script = ExtResource("1_rpa0n")
 placeholder_size = Vector2(227, 25)
+metadata/s = SubResource("GDScript_tb7ap")

language_client_test.tscn

@@ -0,0 +1,14 @@
+[gd_scene load_steps=2 format=3 uid="uid://dthrl53okqjb"]
+
+[ext_resource type="PackedScene" uid="uid://d1jujxfamsekk" path="res://addons/pronto/signal_connecting/expression_edit.tscn" id="2_5guic"]
+
+[node name="Node" type="Control"]
+layout_mode = 3
+anchors_preset = 0
+
+[node name="expression_edit" parent="." instance=ExtResource("2_5guic")]
+layout_mode = 1
+offset_left = 37.0
+offset_top = 40.0
+offset_right = 217.0
+offset_bottom = 74.0