fix: only set dark theme on success

Author: amorphobia

Lib/RabbitCandidateBox.ahk

@@ -51,7 +51,6 @@ class CandidateBox extends Gui {
     }
 
     UpdateUIStyle() {
-        global IS_DARK_MODE
         local back_color_val := UIStyle.back_color & 0xffffff ; alpha not supported
         local text_color := Format("c{:x}", UIStyle.text_color & 0xffffff)
         local font_point := Format("S{:d}", UIStyle.font_point)
@@ -61,7 +60,7 @@ class CandidateBox extends Gui {
         this.pre.SetFont(Format("{} {}", font_point, text_color), font_face)
         this.lv.Opt(Format("{} Background0x{:x}", text_color, back_color_val))
 
-        if IS_DARK_MODE {
+        if UIStyle.use_dark {
             DllCall("uxtheme\SetWindowTheme", "ptr", this.lv.hwnd, "WStr", "DarkMode_Explorer", "ptr", 0)
             DllCall("uxtheme\SetWindowTheme", "ptr", this.lv.hwnd, "WStr", "DarkMode_ItemsView", "ptr", 0)
         } else {

Lib/RabbitConfig.ahk

@@ -62,7 +62,7 @@ class RabbitConfig {
         UIStyle.Update(config, true)
         if IS_DARK_MODE := RabbitIsUserDarkMode() {
             if color_name := rime.config_get_string(config, "style/color_scheme_dark")
-                UIStyle.UpdateColor(config, color_name)
+                UIStyle.use_dark := UIStyle.UpdateColor(config, color_name)
         }
 
         rime.config_close(config)

Lib/RabbitUIStyle.ahk

@@ -19,6 +19,7 @@
 #Include <RabbitCommon>
 
 class UIStyle {
+    static use_dark := false
     static text_color := 0xff000000
     static back_color := 0xffeceeee
     static font_face := "Microsoft YaHei UI"
@@ -28,6 +29,7 @@ class UIStyle {
         global rime
         if !rime || !config
             return
+        UIStyle.use_dark := false
         UIStyle.font_face := rime.config_get_string(config, "style/font_face")
         if not UIStyle.font_face
             UIStyle.font_face := "Microsoft YaHei UI"
@@ -58,7 +60,7 @@ class UIStyle {
 
     static GetColor(config, key, fmt, fallback) {
         global rime
-        if not color := rime.config_get_string(config, key)
+        if not rime.config_test_get_string(config, key, &color)
             return fallback
 
         local val := fallback
@@ -135,7 +137,7 @@ OnColorChange(wParam, lParam, msg, hWnd) {
             UIStyle.Update(config, true)
             if IS_DARK_MODE {
                 if color_name := rime.config_get_string(config, "style/color_scheme_dark")
-                    UIStyle.UpdateColor(config, color_name)
+                    UIStyle.use_dark := UIStyle.UpdateColor(config, color_name)
             }
 
             rime.config_close(config)