[jewel] Bugfix decorated window on windows

Reference https://github.com/JetBrains/jewel/pull/731

closes https://github.com/JetBrains/intellij-community/pull/2920

(cherry picked from commit 61be2b8b30ef3417937e0966b7f2e2d5082542ed)


(cherry picked from commit 97ce6439aa53ec5c13241e3607508ab8b378929d)

IJ-MR-155570

GitOrigin-RevId: 1f8fdb352c6cbac72d7e22fd9e4ce8624ee5281d

platform/jewel/decorated-window/api-dump-unreviewed.txt

@@ -35,6 +35,10 @@ com.jetbrains.WindowDecorations$CustomTitleBar
 - a:setHeight(F):V
 com.jetbrains.WindowMove
 - a:startMovingTogetherWithMouse(java.awt.Window,I):V
+f:org.jetbrains.jewel.window.ComposableSingletons$TitleBarKt
+- sf:INSTANCE:org.jetbrains.jewel.window.ComposableSingletons$TitleBarKt
+- <init>():V
+- f:getLambda-1$intellij_platform_jewel_decoratedWindow():kotlin.jvm.functions.Function2
 f:org.jetbrains.jewel.window.DecoratedWindowKt
 - sf:DecoratedWindow(kotlin.jvm.functions.Function0,androidx.compose.ui.window.WindowState,Z,java.lang.String,androidx.compose.ui.graphics.painter.Painter,Z,Z,Z,Z,kotlin.jvm.functions.Function1,kotlin.jvm.functions.Function1,org.jetbrains.jewel.window.styling.DecoratedWindowStyle,kotlin.jvm.functions.Function3,androidx.compose.runtime.Composer,I,I,I):V
 org.jetbrains.jewel.window.DecoratedWindowScope

platform/jewel/decorated-window/api/decorated-window.api

@@ -49,6 +49,13 @@ public abstract interface class com/jetbrains/WindowMove {
 	public abstract fun startMovingTogetherWithMouse (Ljava/awt/Window;I)V
 }
 
+public final class org/jetbrains/jewel/window/ComposableSingletons$TitleBarKt {
+	public static final field INSTANCE Lorg/jetbrains/jewel/window/ComposableSingletons$TitleBarKt;
+	public static field lambda-1 Lkotlin/jvm/functions/Function2;
+	public fun <init> ()V
+	public final fun getLambda-1$decorated_window ()Lkotlin/jvm/functions/Function2;
+}
+
 public final class org/jetbrains/jewel/window/DecoratedWindowKt {
 	public static final fun DecoratedWindow (Lkotlin/jvm/functions/Function0;Landroidx/compose/ui/window/WindowState;ZLjava/lang/String;Landroidx/compose/ui/graphics/painter/Painter;ZZZZLkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lorg/jetbrains/jewel/window/styling/DecoratedWindowStyle;Lkotlin/jvm/functions/Function3;Landroidx/compose/runtime/Composer;III)V
 }

platform/jewel/decorated-window/src/main/kotlin/org/jetbrains/jewel/window/TitleBar.Windows.kt

@@ -1,6 +1,8 @@
 package org.jetbrains.jewel.window
 
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
@@ -27,7 +29,7 @@ internal fun DecoratedWindowScope.TitleBarOnWindows(
     val titleBar = remember { JBR.getWindowDecorations().createCustomTitleBar() }
 
     TitleBarImpl(
-        modifier = modifier.customTitleBarMouseEventHandler(titleBar),
+        modifier = modifier,
         gradientStartColor = gradientStartColor,
         style = style,
         applyTitleBar = { height, _ ->
@@ -36,6 +38,7 @@ internal fun DecoratedWindowScope.TitleBarOnWindows(
             JBR.getWindowDecorations().setCustomTitleBar(window, titleBar)
             PaddingValues(start = titleBar.leftInset.dp, end = titleBar.rightInset.dp)
         },
+        backgroundContent = { Spacer(modifier = modifier.fillMaxSize().customTitleBarMouseEventHandler(titleBar)) },
         content = content,
     )
 }

platform/jewel/decorated-window/src/main/kotlin/org/jetbrains/jewel/window/TitleBar.kt

@@ -1,8 +1,10 @@
 package org.jetbrains.jewel.window
 
 import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.runtime.Composable
@@ -77,6 +79,7 @@ internal fun DecoratedWindowScope.TitleBarImpl(
     gradientStartColor: Color = Color.Unspecified,
     style: TitleBarStyle = JewelTheme.defaultTitleBarStyle,
     applyTitleBar: (Dp, DecoratedWindowState) -> PaddingValues,
+    backgroundContent: @Composable () -> Unit = {},
     content: @Composable TitleBarScope.(DecoratedWindowState) -> Unit,
 ) {
     val titleBarInfo = LocalTitleBarInfo.current
@@ -102,19 +105,7 @@ internal fun DecoratedWindowScope.TitleBarImpl(
             }
         }
 
-    Layout(
-        content = {
-            CompositionLocalProvider(
-                LocalContentColor provides style.colors.content,
-                LocalIconButtonStyle provides style.iconButtonStyle,
-                LocalDefaultDropdownStyle provides style.dropdownStyle,
-            ) {
-                OverrideDarkMode(background.isDark()) {
-                    val scope = TitleBarScopeImpl(titleBarInfo.title, titleBarInfo.icon)
-                    scope.content(state)
-                }
-            }
-        },
+    Box(
         modifier =
             modifier
                 .background(backgroundBrush)
@@ -122,9 +113,26 @@ internal fun DecoratedWindowScope.TitleBarImpl(
                 .layoutId(TITLE_BAR_LAYOUT_ID)
                 .height(style.metrics.height)
                 .onSizeChanged { with(density) { applyTitleBar(it.height.toDp(), state) } }
-                .fillMaxWidth(),
-        measurePolicy = rememberTitleBarMeasurePolicy(window, state, applyTitleBar),
-    )
+                .fillMaxWidth()
+    ) {
+        backgroundContent()
+        Layout(
+            content = {
+                CompositionLocalProvider(
+                    LocalContentColor provides style.colors.content,
+                    LocalIconButtonStyle provides style.iconButtonStyle,
+                    LocalDefaultDropdownStyle provides style.dropdownStyle,
+                ) {
+                    OverrideDarkMode(background.isDark()) {
+                        val scope = TitleBarScopeImpl(titleBarInfo.title, titleBarInfo.icon)
+                        scope.content(state)
+                    }
+                }
+            },
+            modifier = modifier.fillMaxSize(),
+            measurePolicy = rememberTitleBarMeasurePolicy(window, state, applyTitleBar),
+        )
+    }
 
     Spacer(Modifier.layoutId(TITLE_BAR_BORDER_LAYOUT_ID).height(1.dp).fillMaxWidth().background(style.colors.border))
 }