From 78fd934666441d56233ed83b449df493ed6a2494 Mon Sep 17 00:00:00 2001
From: mitoma <mutetheradio@gmail.com>
Date: Sat, 21 Dec 2024 18:05:03 +0900
Subject: [PATCH] =?UTF-8?q?=E3=83=87=E3=83=95=E3=82=A9=E3=83=AB=E3=83=88?=
 =?UTF-8?q?=E3=83=95=E3=82=A9=E3=83=B3=E3=83=88=E3=81=AB=E6=88=BB=E3=81=9B?=
 =?UTF-8?q?=E3=82=8B=E3=82=88=E3=81=86=E3=81=AB=E3=81=97=E3=81=9F?=
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---
 font_collector/src/lib.rs       |  4 ++++
 ui_support/src/action/system.rs | 31 ++++++++++++++++++-------------
 ui_support/src/lib.rs           |  2 +-
 ui_support/src/render_state.rs  | 11 +++++++++--
 4 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/font_collector/src/lib.rs b/font_collector/src/lib.rs
index 22c4469..98396b9 100644
--- a/font_collector/src/lib.rs
+++ b/font_collector/src/lib.rs
@@ -46,6 +46,10 @@ impl FontRepository {
         }
     }
 
+    pub fn clear_primary_font(&mut self) {
+        self.primary_font = None;
+    }
+
     pub fn add_fallback_font_from_system(&mut self, font_name: &str) {
         if let Some(font_data) = self.font_collector.load_font(font_name) {
             self.fallback_fonts.push(font_data);
diff --git a/ui_support/src/action/system.rs b/ui_support/src/action/system.rs
index 1a9083e..8c63be9 100644
--- a/ui_support/src/action/system.rs
+++ b/ui_support/src/action/system.rs
@@ -302,17 +302,22 @@ impl ActionProcessor for SystemChangeFontUi {
         context: &StateContext,
         world: &mut dyn World,
     ) -> InputResult {
-        let options = context
-            .font_repository
-            .list_font_names()
-            .iter()
-            .map(|name| {
-                SelectOption::new(
-                    name.clone(),
-                    Action::new_command_with_argument("system", "change-font", name),
-                )
-            })
-            .collect::<Vec<SelectOption>>();
+        let mut options = vec![SelectOption::new(
+            "デフォルトフォント".to_string(),
+            Action::new_command("system", "change-font"),
+        )];
+        options.extend(
+            context
+                .font_repository
+                .list_font_names()
+                .iter()
+                .map(|name| {
+                    SelectOption::new(
+                        name.clone(),
+                        Action::new_command_with_argument("system", "change-font", name),
+                    )
+                }),
+        );
 
         let model = SelectBox::new_without_action_name(
             context,
@@ -351,9 +356,9 @@ impl ActionProcessor for SystemChangeFont {
         _world: &mut dyn World,
     ) -> InputResult {
         if let ActionArgument::String(font_name) = arg {
-            InputResult::ChangeFont(font_name.clone())
+            InputResult::ChangeFont(Some(font_name.clone()))
         } else {
-            InputResult::Noop
+            InputResult::ChangeFont(None)
         }
     }
 }
diff --git a/ui_support/src/lib.rs b/ui_support/src/lib.rs
index 1e05f95..1b445c2 100644
--- a/ui_support/src/lib.rs
+++ b/ui_support/src/lib.rs
@@ -378,7 +378,7 @@ pub enum InputResult {
     ChangeBackgroundImage(Option<DynamicImage>),
     ChangeGlobalDirection(Direction),
     ChangeWindowSize(WindowSize),
-    ChangeFont(String),
+    ChangeFont(Option<String>),
     SendExit,
     Noop,
 }
diff --git a/ui_support/src/render_state.rs b/ui_support/src/render_state.rs
index ce2da5c..07de54a 100644
--- a/ui_support/src/render_state.rs
+++ b/ui_support/src/render_state.rs
@@ -505,8 +505,15 @@ impl RenderState {
         self.simple_state_callback.shutdown();
     }
 
-    pub(crate) fn change_font(&mut self, font_name: String) {
-        self.context.font_repository.set_primary_font(&font_name);
+    pub(crate) fn change_font(&mut self, font_name: Option<String>) {
+        match font_name {
+            Some(font_name) => {
+                self.context.font_repository.set_primary_font(&font_name);
+            }
+            None => {
+                self.context.font_repository.clear_primary_font();
+            }
+        }
         let font_binaries = self.context.font_repository.get_fonts();
         let font_binaries = Arc::new(font_binaries);
         let char_width_calcurator = Arc::new(CharWidthCalculator::new(font_binaries.clone()));