Improve rendering of "All chats" regarding fontScale. (#984)

features/roomlist/impl/src/main/kotlin/io/element/android/features/roomlist/impl/components/RoomListTopBar.kt

@@ -43,6 +43,8 @@ import io.element.android.libraries.designsystem.components.avatar.Avatar
 import io.element.android.libraries.designsystem.components.avatar.AvatarSize
 import io.element.android.libraries.designsystem.preview.ElementPreviewDark
 import io.element.android.libraries.designsystem.preview.ElementPreviewLight
+import io.element.android.libraries.designsystem.text.scaleMax
+import io.element.android.libraries.designsystem.text.toSp
 import io.element.android.libraries.designsystem.theme.aliasScreenTitle
 import io.element.android.libraries.designsystem.theme.components.DropdownMenu
 import io.element.android.libraries.designsystem.theme.components.DropdownMenuItem
@@ -114,7 +116,11 @@ private fun DefaultRoomListTopBar(
             val fontStyle = if (scrollBehavior.state.collapsedFraction > 0.5)
                 ElementTheme.typography.aliasScreenTitle
             else
-                ElementTheme.typography.fontHeadingLgBold
+                ElementTheme.typography.fontHeadingLgBold.copy(
+                    // Due to a limitation of MediumTopAppBar, and to avoid the text to be truncated,
+                    // limit the size to 28.dp instead of 28.sp
+                    fontSize = 28.dp.scaleMax().toSp()
+                )
             Text(
                 style = fontStyle,
                 text = stringResource(id = R.string.screen_roomlist_main_space_title)

libraries/designsystem/src/main/kotlin/io/element/android/libraries/designsystem/text/UnitConverters.kt

@@ -52,3 +52,11 @@ fun Dp.toPx(): Float = with(LocalDensity.current) { toPx() }
  */
 @Composable
 fun Dp.roundToPx(): Int = with(LocalDensity.current) { roundToPx() }
+
+/**
+ * Return the maximum value between the receiver value and the value with fonScale applied.
+ */
+@Composable
+fun Dp.scaleMax(): Dp = with(LocalDensity.current) {
+    return this@scaleMax * fontScale.coerceAtMost(1f)
+}