add BeforeAfterImageScope

Author: SmartToolFactory

image/src/main/java/com/smarttoolfactory/image/beforeafter/BeforeAfterImageScope.kt

@@ -0,0 +1,39 @@
+package com.smarttoolfactory.image.beforeafter
+
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.unit.Constraints
+import androidx.compose.ui.unit.Density
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.IntRect
+import com.smarttoolfactory.image.ImageScope
+
+/**
+ * Scope for before-after images that returns touch position on Composable
+ */
+interface BeforeAfterImageScope : ImageScope {
+    var touchPosition: Offset
+}
+
+class BeforeAfterImageScopeImpl(
+    private val density: Density,
+    override val constraints: Constraints,
+    override val imageWidth: Dp,
+    override val imageHeight: Dp,
+    override val rect: IntRect,
+    override var touchPosition: Offset,
+) : BeforeAfterImageScope {
+
+    override val minWidth: Dp get() = with(density) { constraints.minWidth.toDp() }
+
+    override val maxWidth: Dp
+        get() = with(density) {
+            if (constraints.hasBoundedWidth) constraints.maxWidth.toDp() else Dp.Infinity
+        }
+
+    override val minHeight: Dp get() = with(density) { constraints.minHeight.toDp() }
+
+    override val maxHeight: Dp
+        get() = with(density) {
+            if (constraints.hasBoundedHeight) constraints.maxHeight.toDp() else Dp.Infinity
+        }
+}