Create UnreadIndicatorAtom with preview.

libraries/designsystem/src/main/kotlin/io/element/android/libraries/designsystem/atomic/atoms/UnreadIndicatorAtom.kt

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2023 New Vector Ltd
+ *
+ * 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 io.element.android.libraries.designsystem.atomic.atoms
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import io.element.android.libraries.designsystem.preview.ElementPreviewDark
+import io.element.android.libraries.designsystem.preview.ElementPreviewLight
+import io.element.android.libraries.designsystem.theme.roomListUnreadIndicator
+
+@Composable
+fun UnreadIndicatorAtom(
+    modifier: Modifier = Modifier,
+    size: Dp = 12.dp,
+    color: Color = MaterialTheme.roomListUnreadIndicator(),
+) {
+    Box(
+        modifier = modifier
+            .size(size)
+            .clip(CircleShape)
+            .background(color)
+    )
+}
+
+@Preview
+@Composable
+internal fun UnreadIndicatorAtomLightPreview() =
+    ElementPreviewLight { ContentToPreview() }
+
+@Preview
+@Composable
+internal fun UnreadIndicatorAtomDarkPreview() =
+    ElementPreviewDark { ContentToPreview() }
+
+@Composable
+private fun ContentToPreview() {
+    UnreadIndicatorAtom()
+}