tunjid · tunjid · Oct 18, 2024 · Oct 17, 2024 · Oct 17, 2024 · Oct 17, 2024
diff --git a/...onMain/kotlin/com/tunjid/treenav/compose/configurations/AnimatePaneBoundsConfiguration.kt b/...onMain/kotlin/com/tunjid/treenav/compose/configurations/AnimatePaneBoundsConfiguration.kt
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.tunjid.treenav.compose.configurations
+
+import androidx.compose.animation.BoundsTransform
+import androidx.compose.animation.ExperimentalSharedTransitionApi
+import androidx.compose.foundation.layout.Box
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.layout.LookaheadScope
+import com.tunjid.treenav.Node
+import com.tunjid.treenav.compose.PaneScope
+import com.tunjid.treenav.compose.PanedNavHostConfiguration
+import com.tunjid.treenav.compose.delegated
+import com.tunjid.treenav.compose.paneStrategy
+import com.tunjid.treenav.compose.utilities.AnimatedBoundsState
+import com.tunjid.treenav.compose.utilities.AnimatedBoundsState.Companion.animateBounds
+import com.tunjid.treenav.compose.utilities.DefaultBoundsTransform
+
+/**
+ * A [PanedNavHostConfiguration] that animates the bounds of each [Pane] displayed within it.
+ * This is useful for scenarios where the panes move within a layout hierarchy to accommodate
+ * other panes.
+ *
+ * @param lookaheadScope the root [LookaheadScope] where the panes are rendered in.
+ * @param paneBoundsTransform a lambda providing the [BoundsTransform] for each [Pane].
+ * @param shouldAnimatePane a lambda for toggling when the pane can be animated. It allows for
+ * skipping an animation in progress.
+ */
+@OptIn(ExperimentalSharedTransitionApi::class)
+fun <Pane, NavigationState : Node, Destination : Node> PanedNavHostConfiguration<
+        Pane,
+        NavigationState,
+        Destination
+        >.animatePaneBoundsConfiguration(
+    lookaheadScope: LookaheadScope,
+    paneBoundsTransform: PaneScope<Pane, Destination>.() -> BoundsTransform = { DefaultBoundsTransform },
+    shouldAnimatePane: PaneScope<Pane, Destination>.() -> Boolean = { true },
+): PanedNavHostConfiguration<Pane, NavigationState, Destination> = delegated {
+    val originalTransform = strategyTransform(it)
+    paneStrategy(
+        transitions = originalTransform.transitions,
+        paneMapping = originalTransform.paneMapper,
+        render = render@{ destination ->
+            Box(
+                modifier = Modifier.animateBounds(
+                    state = remember {
+                        AnimatedBoundsState(
+                            lookaheadScope = lookaheadScope,
+                            boundsTransform = paneBoundsTransform(),
+                            inProgress = { shouldAnimatePane() }
+                        )
+                    }
+                )
+            ) {
+                originalTransform.render(this@render, destination)
+            }
+        }
+    )
+}
diff --git a/...tlin/com/tunjid/treenav/compose/moveablesharedelement/BoundsTransformDeferredAnimation.kt b/...tlin/com/tunjid/treenav/compose/moveablesharedelement/BoundsTransformDeferredAnimation.kt