From fd714d04dff2547fec6236a8b9103e31829065ba Mon Sep 17 00:00:00 2001
From: Emmanouil Papadeas <35376950+OverloadedOrama@users.noreply.github.com>
Date: Thu, 17 Oct 2024 16:52:42 +0300
Subject: [PATCH] Update the ExtensionsAPI to handle fonts

---
 project.godot                        |  2 +-
 src/Autoload/ExtensionsApi.gd        | 23 +++++++++++++++++++++++
 src/Autoload/Global.gd               |  1 +
 src/Preferences/PreferencesDialog.gd | 13 ++++++++++---
 4 files changed, 35 insertions(+), 4 deletions(-)

diff --git a/project.godot b/project.godot
index 78920d2f8..e5ac05993 100644
--- a/project.godot
+++ b/project.godot
@@ -24,7 +24,7 @@ boot_splash/use_filter=false
 config/icon="res://assets/graphics/icons/icon.png"
 config/macos_native_icon="res://assets/graphics/icons/icon.icns"
 config/windows_native_icon="res://assets/graphics/icons/icon.ico"
-config/ExtensionsAPI_Version=4
+config/ExtensionsAPI_Version=5
 config/Pxo_Version=3
 
 [audio]
diff --git a/src/Autoload/ExtensionsApi.gd b/src/Autoload/ExtensionsApi.gd
index 6c4259e63..3b4faaaba 100644
--- a/src/Autoload/ExtensionsApi.gd
+++ b/src/Autoload/ExtensionsApi.gd
@@ -409,6 +409,29 @@ class ThemeAPI:
 		Themes.remove_theme(theme)
 		ExtensionsApi.remove_action("ThemeAPI", "add_theme")
 
+	## Adds a new font.
+	func add_font(font: Font) -> void:
+		Global.loaded_fonts.append(font)
+		Global.font_loaded.emit()
+
+	## Removes a loaded font.
+	## If that font is the current one of the interface, set it back to Roboto.
+	func remove_font(font: Font) -> void:
+		var font_index := Global.loaded_fonts.find(font)
+		if font_index == -1:
+			return
+		if Global.theme_font_index == font_index:
+			Global.theme_font_index = 1
+		Global.loaded_fonts.remove_at(font_index)
+		Global.font_loaded.emit()
+
+	## Sets a font as the current one for the interface. The font must have been
+	## added beforehand by [method add_font].
+	func set_font(font: Font) -> void:
+		var font_index := Global.loaded_fonts.find(font)
+		if font_index > -1:
+			Global.theme_font_index = font_index
+
 
 ## Gives ability to add/remove tools.
 class ToolAPI:
diff --git a/src/Autoload/Global.gd b/src/Autoload/Global.gd
index 72a8ae827..1d6e7ed22 100644
--- a/src/Autoload/Global.gd
+++ b/src/Autoload/Global.gd
@@ -12,6 +12,7 @@ signal project_about_to_switch  ## Emitted before a project is about to be switc
 signal project_switched  ## Emitted whenever you switch to some other project tab.
 signal cel_switched  ## Emitted whenever you select a different cel.
 signal project_data_changed(project: Project)  ## Emitted when project data is modified.
+signal font_loaded  ## Emitted when a new font has been loaded, or an old one gets unloaded.
 
 enum LayerTypes { PIXEL, GROUP, THREE_D }
 enum GridTypes { CARTESIAN, ISOMETRIC, ALL }
diff --git a/src/Preferences/PreferencesDialog.gd b/src/Preferences/PreferencesDialog.gd
index c662950d4..3d6bcf42f 100644
--- a/src/Preferences/PreferencesDialog.gd
+++ b/src/Preferences/PreferencesDialog.gd
@@ -241,6 +241,7 @@ class Preference:
 
 
 func _ready() -> void:
+	Global.font_loaded.connect(_add_fonts)
 	# Replace OK since preference changes are being applied immediately, not after OK confirmation
 	get_ok_button().text = "Close"
 	get_ok_button().size_flags_horizontal = Control.SIZE_EXPAND_FILL
@@ -293,9 +294,7 @@ func _ready() -> void:
 		language.add_child(button)
 		button.pressed.connect(_on_language_pressed.bind(button.get_index()))
 
-	# Add fonts to the font option button
-	for font_name in Global.get_available_font_names():
-		%FontOptionButton.add_item(font_name)
+	_add_fonts()
 
 	for pref in preferences:
 		if not right_side.has_node(pref.node_path):
@@ -363,6 +362,14 @@ func _on_Preference_value_changed(value, pref: Preference, button: RestoreDefaul
 	disable_restore_default_button(button, disable)
 
 
+## Add fonts to the font option button.
+func _add_fonts() -> void:
+	%FontOptionButton.clear()
+	for font_name in Global.get_available_font_names():
+		%FontOptionButton.add_item(font_name)
+	%FontOptionButton.select(Global.theme_font_index)
+
+
 func preference_update(require_restart := false) -> void:
 	if require_restart:
 		must_restart.visible = true