[BOOK-291] fix: preventMultiTouch Modifier 확장함수 부모 컴포저블에 적용

Author: seoyoon513

core/common/src/main/kotlin/com/ninecraft/booket/core/common/extensions/Modifier.kt

@@ -1,6 +1,8 @@
 package com.ninecraft.booket.core.common.extensions
 
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.gestures.awaitEachGesture
+import androidx.compose.foundation.gestures.awaitFirstDown
 import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.material3.ripple
 import androidx.compose.runtime.remember
@@ -9,6 +11,8 @@ import androidx.compose.ui.composed
 import androidx.compose.ui.draw.drawWithContent
 import androidx.compose.ui.graphics.layer.GraphicsLayer
 import androidx.compose.ui.graphics.layer.drawLayer
+import androidx.compose.ui.input.pointer.PointerEventPass
+import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.platform.debugInspectorInfo
 import androidx.compose.ui.semantics.Role
 import com.ninecraft.booket.core.common.utils.MultipleEventsCutter
@@ -54,3 +58,21 @@ fun Modifier.captureToGraphicsLayer(graphicsLayer: GraphicsLayer) =
         graphicsLayer.record { this@drawWithContent.drawContent() }
         drawLayer(graphicsLayer)
     }
+
+/**
+ * 부모 영역에서 동시 터치(두 손가락 이상)를 차단하는 Modifier
+ */
+fun Modifier.preventMultiTouch() = pointerInput(Unit) {
+    // awaitEachGesture: 한 번의 제스쳐 세션을 추상화
+    awaitEachGesture {
+        val first = awaitFirstDown(requireUnconsumed = false)
+        do {
+            // 이벤트 전파 초기 단계(PointerEventPass.Initial)에서 하위 컴포저블로 이벤트가 내려가기 전에 가로채 소비한다
+            val event = awaitPointerEvent(pass = PointerEventPass.Initial)
+            event.changes.forEach { change ->
+                if (change.id != first.id && change.pressed) change.consume()
+            }
+            // 루프 조건: 첫 포인터가 pressed 상태일 동안만 유지한다 (up이거나 cancel되면 pressed=false로 루프 종료)
+        } while (event.changes.any { it.id == first.id && it.pressed })
+    }
+}

core/ui/src/main/kotlin/com/ninecraft/booket/core/ui/ReedScaffold.kt

@@ -7,6 +7,7 @@ import androidx.compose.material3.ScaffoldDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import com.ninecraft.booket.core.common.extensions.preventMultiTouch
 import com.ninecraft.booket.core.designsystem.theme.White
 import tech.thdev.compose.extensions.keyboard.state.foundation.keyboardHide
 
@@ -22,7 +23,9 @@ fun ReedScaffold(
     content: @Composable (PaddingValues) -> Unit,
 ) {
     Scaffold(
-        modifier = modifier.keyboardHide(),
+        modifier = modifier
+            .keyboardHide()
+            .preventMultiTouch(),
         topBar = topBar,
         bottomBar = bottomBar,
         snackbarHost = snackbarHost,

feature/record/src/main/kotlin/com/ninecraft/booket/feature/record/register/RecordRegisterUi.kt

@@ -17,6 +17,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
+import com.ninecraft.booket.core.common.extensions.preventMultiTouch
 import com.ninecraft.booket.core.designsystem.DevicePreview
 import com.ninecraft.booket.core.designsystem.RecordStep
 import com.ninecraft.booket.core.designsystem.component.RecordProgressBar
@@ -46,7 +47,9 @@ internal fun RecordRegisterUi(
     }
 
     Scaffold(
-        modifier = modifier.fillMaxSize(),
+        modifier = modifier
+            .fillMaxSize()
+            .preventMultiTouch(),
         containerColor = White,
         contentWindowInsets = ScaffoldDefaults.contentWindowInsets.exclude(WindowInsets.ime),
     ) { innerPadding ->