From ed56385d140d57c6f8535abc8468f7b104f8ec6b Mon Sep 17 00:00:00 2001
From: Sebastian Morr <sebastian@morr.cc>
Date: Fri, 25 Sep 2020 12:04:45 +0200
Subject: [PATCH] Basic completion framework

---
 terminal.gd   | 55 ++++++++++++++++++++++++++++++++++++++++++++++++---
 terminal.tscn | 33 +++++++++++++++++++++++++------
 2 files changed, 79 insertions(+), 9 deletions(-)

diff --git a/terminal.gd b/terminal.gd
index f5e40d1..1472b91 100644
--- a/terminal.gd
+++ b/terminal.gd
@@ -5,11 +5,12 @@ var thread
 var history = []
 var history_position = 0
 
-onready var input = $Control/InputLine/Input
-onready var output = $Control/Output
+onready var input = $VBoxContainer/InputLine/Input
+onready var output = $VBoxContainer/TopHalf/Output
+onready var completions = $VBoxContainer/TopHalf/Completions
 export(NodePath) var repository_path
 onready var repository = get_node(repository_path)
-onready var command_dropdown = $Control/InputLine/CommandDropdown
+onready var command_dropdown = $VBoxContainer/InputLine/CommandDropdown
 onready var main = get_tree().get_root().get_node("Main")
 
 var premade_commands = [
@@ -89,3 +90,51 @@ func editor_closed():
 func check_win_condition():
 	if repository.shell.run("bash /tmp/win 2>/dev/null >/dev/null && echo yes || echo no") == "yes\n":
 		main.show_win_status()
+		
+func regenerate_completions_menu(new_text):
+	var comp = generate_completions(new_text)
+	
+	completions.clear()
+	
+	var filtered_comp = []
+	for c in comp:
+		if c != new_text:
+			filtered_comp.push_back(c)
+	
+	if filtered_comp.size() == 0:
+		completions.hide()
+	else:
+		completions.show()
+	
+		var _root = completions.create_item()
+		for c in filtered_comp:
+			var child = completions.create_item()
+			child.set_text(0, c)
+
+func generate_completions(command):
+	if command.substr(0, 4) == "git ":
+		var rest = command.substr(4)
+		var subcommands = [
+			"commit",
+			"status",
+			"diff",
+		]
+		
+		var results = []
+		for sc in subcommands:
+			if sc.substr(0, rest.length()) == rest:
+				results.push_back("git "+sc)
+				
+		return results
+	return []
+
+func _input_changed(new_text):
+	call_deferred("regenerate_completions_menu", new_text)
+
+func _completion_selected():
+	var item = completions.get_selected()
+	input.text = item.get_text(0)
+	input.emit_signal("text_changed", input.text)
+	#completions.hide()
+	input.grab_focus()
+	input.caret_position = input.text.length()
diff --git a/terminal.tscn b/terminal.tscn
index 7010b04..978f2c3 100644
--- a/terminal.tscn
+++ b/terminal.tscn
@@ -27,27 +27,46 @@ __meta__ = {
 "_edit_use_anchors_": false
 }
 
-[node name="Control" type="VBoxContainer" parent="."]
+[node name="VBoxContainer" type="VBoxContainer" parent="."]
 anchor_right = 1.0
 anchor_bottom = 1.0
 __meta__ = {
 "_edit_use_anchors_": false
 }
 
-[node name="Output" type="RichTextLabel" parent="Control"]
+[node name="TopHalf" type="Control" parent="VBoxContainer"]
+margin_right = 1920.0
+margin_bottom = 1045.0
+size_flags_vertical = 3
+
+[node name="Output" type="RichTextLabel" parent="VBoxContainer/TopHalf"]
+margin_top = 4.0
 margin_right = 1920.0
 margin_bottom = 1045.0
 size_flags_vertical = 3
 custom_styles/normal = SubResource( 1 )
 custom_fonts/normal_font = ExtResource( 4 )
 scroll_following = true
+__meta__ = {
+"_edit_use_anchors_": false
+}
 
-[node name="InputLine" type="HBoxContainer" parent="Control"]
+[node name="Completions" type="Tree" parent="VBoxContainer/TopHalf"]
+anchor_top = 1.0
+anchor_right = 1.0
+anchor_bottom = 1.0
+margin_top = -223.0
+hide_root = true
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="InputLine" type="HBoxContainer" parent="VBoxContainer"]
 margin_top = 1049.0
 margin_right = 1920.0
 margin_bottom = 1080.0
 
-[node name="Input" type="LineEdit" parent="Control/InputLine"]
+[node name="Input" type="LineEdit" parent="VBoxContainer/InputLine"]
 margin_right = 1892.0
 margin_bottom = 31.0
 size_flags_horizontal = 3
@@ -56,7 +75,7 @@ __meta__ = {
 "_edit_use_anchors_": false
 }
 
-[node name="CommandDropdown" type="MenuButton" parent="Control/InputLine"]
+[node name="CommandDropdown" type="MenuButton" parent="VBoxContainer/InputLine"]
 margin_left = 1896.0
 margin_right = 1920.0
 margin_bottom = 31.0
@@ -86,6 +105,8 @@ mouse_filter = 1
 syntax_highlighting = false
 
 [node name="TCPServer" parent="." instance=ExtResource( 3 )]
-[connection signal="text_entered" from="Control/InputLine/Input" to="." method="send_command"]
+[connection signal="item_selected" from="VBoxContainer/TopHalf/Completions" to="." method="_completion_selected"]
+[connection signal="text_changed" from="VBoxContainer/InputLine/Input" to="." method="_input_changed"]
+[connection signal="text_entered" from="VBoxContainer/InputLine/Input" to="." method="send_command"]
 [connection signal="pressed" from="ClearButton" to="." method="clear"]
 [connection signal="data_received" from="TCPServer" to="." method="receive_output"]