Add wallpaper refresh on monitor configuration change

common/src/ipc/types.rs

@@ -86,6 +86,10 @@ impl BgImg {
             Self::Img(s) => 4 + s.len()
         }
     }
+
+    pub fn is_set(&self) -> bool {
+        matches!(self, Self::Img(_))
+    }
 }
 
 impl fmt::Display for BgImg {
@@ -147,7 +151,7 @@ impl PixelFormat {
     }
 }
 
-#[derive(Clone, Copy, Debug, PartialEq)]
+#[derive(Clone, Copy, Debug)]
 pub enum Scale {
     Whole(NonZeroI32),
     Fractional(NonZeroI32),
@@ -183,6 +187,18 @@ impl Scale {
     }
 }
 
+impl PartialEq for Scale {
+    fn eq(&self, other: &Self) -> bool {
+        (match self {
+            Self::Whole(i) => i.get() * 120,
+            Self::Fractional(f) => f.get(),
+        }) == (match other {
+            Self::Whole(i) => i.get() * 120,
+            Self::Fractional(f) => f.get(),
+        })
+    }
+}
+
 impl fmt::Display for Scale {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(

daemon/src/wallpaper.rs

@@ -182,8 +182,7 @@ impl Wallpaper {
 
     pub fn set_scale(&mut self, scale: Scale) {
         let staging = &mut self.inner_staging;
-        if matches!(staging.scale_factor, Scale::Fractional(_)) && matches!(scale, Scale::Whole(_))
-        {
+        if staging.scale_factor == scale {
             return;
         }
 
@@ -219,7 +218,12 @@ impl Wallpaper {
         let inner = &mut self.inner;
         let staging = &self.inner_staging;
 
-        if inner.name != staging.name && use_cache {
+        if (inner.name != staging.name && use_cache)
+            || (self.img.is_set()
+                && (inner.scale_factor != staging.scale_factor
+                    || inner.width != staging.width
+                    || inner.height != staging.height))
+        {
             let name = staging.name.clone().unwrap_or("".to_string());
             std::thread::Builder::new()
                 .name("cache loader".to_string())