Iterate on Room placeholder

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

@@ -0,0 +1,72 @@
+/*
+ * 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.height
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+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.ElementTheme
+import io.element.android.libraries.designsystem.theme.roomListPlaceHolder
+
+@Composable
+fun PlaceholderAtom(
+    width: Dp,
+    height: Dp,
+    modifier: Modifier = Modifier,
+    color: Color = ElementTheme.colors.roomListPlaceHolder(),
+) {
+    Box(
+        modifier = modifier
+            .width(width)
+            .height(height)
+            .background(
+                color = color,
+                shape = RoundedCornerShape(size = height / 2)
+            )
+    )
+}
+
+@Preview
+@Composable
+internal fun PlaceholderAtomLightPreview() =
+    ElementPreviewLight { ContentToPreview() }
+
+@Preview
+@Composable
+internal fun PlaceholderAtomDarkPreview() =
+    ElementPreviewDark { ContentToPreview() }
+
+@Composable
+private fun ContentToPreview() {
+    // Use a Red background to see the shape
+    Box(modifier = Modifier.background(color = Color.Red)) {
+        PlaceholderAtom(
+            width = 80.dp,
+            height = 12.dp
+        )
+    }
+}

libraries/designsystem/src/main/kotlin/io/element/android/libraries/designsystem/theme/ColorAliases.kt

@@ -24,8 +24,6 @@ import io.element.android.libraries.designsystem.preview.ElementPreviewDark
 import io.element.android.libraries.designsystem.preview.ElementPreviewLight
 import io.element.android.libraries.theme.ElementColors
 import io.element.android.libraries.theme.ElementTheme
-import io.element.android.libraries.theme.SystemGrey4Dark
-import io.element.android.libraries.theme.SystemGrey6Light
 import io.element.android.libraries.theme.previews.ColorListPreview
 import kotlinx.collections.immutable.persistentMapOf
 
@@ -45,7 +43,7 @@ fun MaterialTheme.roomListRoomMessageDate() = colorScheme.secondary
 fun MaterialTheme.roomListUnreadIndicator() = colorScheme.primary
 
 @Composable
-fun ElementColors.roomListPlaceHolder() = if (isLight) SystemGrey6Light else SystemGrey4Dark
+fun ElementColors.roomListPlaceHolder() = if (isLight) Compound_Gray_300_Light else Compound_Gray_300_Dark
 
 @Preview
 @Composable