新增: 壁纸切换（主题/本地图片/Bing/纯色渐变）

win32.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"embed"
 	"log"
 	"unsafe"
 
@@ -9,9 +8,6 @@ import (
 	"golang.org/x/sys/windows"
 )
 
-//go:embed web/wallpaper.html
-var fs embed.FS
-
 var (
 	user32                  = windows.NewLazySystemDLL("user32.dll")
 	procFindWindowW         = user32.NewProc("FindWindowW")
@@ -37,6 +33,9 @@ var jsQueue = make(chan string, 64)
 var paused int32
 
 const wmEvalJS = 0x0401
+const wmSetHtml = 0x0402
+
+var htmlQueue = make(chan string, 1)
 
 func evalJS(js string) {
 	select {
@@ -50,13 +49,6 @@ func evalJS(js string) {
 	}
 }
 
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}
-
 func findWorkerW() uintptr {
 	progman, _, _ := procFindWindowW.Call(
 		uintptr(unsafe.Pointer(windows.StringToUTF16Ptr("Progman"))), 0)