Move all density unit calculation to the same place.

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/actionlist/ActionListView.kt

@@ -42,20 +42,16 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.SheetState
 import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.derivedStateOf
-import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.tooling.preview.PreviewParameter
-import androidx.compose.ui.unit.TextUnit
 import androidx.compose.ui.unit.dp
 import io.element.android.features.messages.impl.actionlist.model.TimelineItemAction
 import io.element.android.features.messages.impl.timeline.model.TimelineItem
@@ -73,6 +69,7 @@ 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.toSp
 import io.element.android.libraries.designsystem.theme.components.Divider
 import io.element.android.libraries.designsystem.theme.components.Icon
 import io.element.android.libraries.designsystem.theme.components.ModalBottomSheet
@@ -168,9 +165,11 @@ private fun SheetContent(
             ) {
                 item {
                     Column {
-                        MessageSummary(event = target.event, modifier = Modifier
+                        MessageSummary(
+                            event = target.event, modifier = Modifier
                             .fillMaxWidth()
-                            .padding(horizontal = 16.dp))
+                            .padding(horizontal = 16.dp)
+                        )
                         Spacer(modifier = Modifier.height(14.dp))
                         Divider()
                     }
@@ -347,7 +346,7 @@ private fun EmojiButton(
 ) {
     Text(
         emoji,
-        fontSize = 28.dpToSp(),
+        fontSize = 28.dp.toSp(),
         modifier = modifier.clickable(
             enabled = true,
             onClick = { onClicked(emoji) },
@@ -357,11 +356,6 @@ private fun EmojiButton(
     )
 }
 
-@Composable
-private fun Int.dpToSp(): TextUnit = with(LocalDensity.current) {
-    return dp.toSp()
-}
-
 @Preview
 @Composable
 fun SheetContentLightPreview(@PreviewParameter(ActionListStateProvider::class) state: ActionListState) =

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/media/local/pdf/PdfViewer.kt

@@ -35,9 +35,9 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.asImageBitmap
 import androidx.compose.ui.layout.ContentScale
-import androidx.compose.ui.platform.LocalDensity
-import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
+import io.element.android.libraries.designsystem.text.roundToPx
+import io.element.android.libraries.designsystem.text.toDp
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.toImmutableList
 import me.saket.telephoto.zoomable.zoomable
@@ -51,7 +51,7 @@ fun PdfViewer(
         modifier = modifier.zoomable(pdfViewerState.zoomableState),
         contentAlignment = Alignment.Center
     ) {
-        val maxWidthInPx = maxWidth.dpToPx()
+        val maxWidthInPx = maxWidth.roundToPx()
         DisposableEffect(pdfViewerState) {
             pdfViewerState.openForWidth(maxWidthInPx)
             onDispose {
@@ -107,15 +107,9 @@ private fun PdfPageView(
             Box(
                 modifier = modifier
                     .fillMaxWidth()
-                    .height(state.height.pxToDp())
+                    .height(state.height.toDp())
                     .background(color = Color.White)
             )
         }
     }
 }
-
-@Composable
-private fun Int.pxToDp() = with(LocalDensity.current) { this@pxToDp.toDp() }
-
-@Composable
-private fun Dp.dpToPx() = with(LocalDensity.current) { this@dpToPx.roundToPx() }

libraries/designsystem/src/main/kotlin/io/element/android/libraries/designsystem/components/avatar/Avatar.kt

@@ -37,7 +37,7 @@ import coil.compose.AsyncImage
 import io.element.android.libraries.designsystem.preview.ElementThemedPreview
 import io.element.android.libraries.designsystem.preview.PreviewGroup
 import io.element.android.libraries.designsystem.preview.debugPlaceholderAvatar
-import io.element.android.libraries.designsystem.text.textDp
+import io.element.android.libraries.designsystem.text.toSp
 import io.element.android.libraries.designsystem.theme.components.Text
 import io.element.android.libraries.theme.AvatarGradientEnd
 import io.element.android.libraries.theme.AvatarGradientStart
@@ -103,7 +103,7 @@ private fun InitialsAvatar(
         Text(
             modifier = Modifier.align(Alignment.Center),
             text = avatarData.initial,
-            fontSize = ((avatarData.size.dp / 2).value).toInt().textDp,
+            fontSize = avatarData.size.dp.toSp() / 2,
             color = Color.White,
         )
     }

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

@@ -18,13 +18,30 @@ package io.element.android.libraries.designsystem.text
 
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.platform.LocalDensity
-import androidx.compose.ui.unit.Density
+import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.TextUnit
-import androidx.compose.ui.unit.dp
 
-private fun Int.textDp(density: Density): TextUnit = with(density) {
-    this@textDp.dp.toSp()
-}
+/**
+ * Convert Dp to Sp, regarding current density.
+ * Can be used for instance to use Dp unit for text.
+ */
+@Composable
+fun Dp.toSp(): TextUnit = with(LocalDensity.current) { toSp() }
+
+/**
+ * Convert Px value to Dp, regarding current density.
+ */
+@Composable
+fun Int.toDp(): Dp = with(LocalDensity.current) { toDp() }
 
-val Int.textDp: TextUnit
-    @Composable get() = this.textDp(density = LocalDensity.current)
+/**
+ * Convert Dp value to pixels, regarding current density.
+ */
+@Composable
+fun Dp.toPx(): Float = with(LocalDensity.current) { toPx() }
+
+/**
+ * Convert Dp value to pixels, regarding current density.
+ */
+@Composable
+fun Dp.roundToPx(): Int = with(LocalDensity.current) { roundToPx() }

libraries/matrixui/src/main/kotlin/io/element/android/libraries/matrix/ui/components/SelectedUsersList.kt

@@ -36,11 +36,11 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.Layout
-import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.tooling.preview.Preview
 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.text.toPx
 import io.element.android.libraries.matrix.api.user.MatrixUser
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.toImmutableList
@@ -76,8 +76,8 @@ fun SelectedUsersList(
     // users, the last visible user will be precisely half visible. This gives an obvious affordance that there are more entries and the list can be scrolled.
     // For efficiency, we assume that all the children are the same width. If they needed to be different sizes we'd have to do this calculation each time
     // they needed to be measured.
-    val minimumSpacing = with(LocalDensity.current) { 24.dp.toPx() }
-    val userWidth = with(LocalDensity.current) { 56.dp.toPx() }
+    val minimumSpacing = 24.dp.toPx()
+    val userWidth = 56.dp.toPx()
     val userSpacing by remember {
         derivedStateOf {
             if (rowWidth == 0) {