Fix situations where Clash mode is too long

app/src/main/java/io/nekohasekai/sfa/compose/screen/dashboard/ClashModeCard.kt

@@ -1,5 +1,9 @@
 package io.nekohasekai.sfa.compose.screen.dashboard
 
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.BoxWithConstraints
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -8,21 +12,33 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.UnfoldMore
+import androidx.compose.material.icons.filled.Check
 import androidx.compose.material.icons.outlined.Tune
 import androidx.compose.material3.Card
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.SegmentedButton
 import androidx.compose.material3.SegmentedButtonDefaults
 import androidx.compose.material3.SingleChoiceSegmentedButtonRow
+import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.rememberTextMeasurer
 import androidx.compose.ui.unit.dp
 import io.nekohasekai.sfa.R
 
@@ -62,6 +78,31 @@ fun ClashModeCard(
 
             Spacer(modifier = Modifier.height(12.dp))
 
+            BoxWithConstraints(
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                val textMeasurer = rememberTextMeasurer()
+                val textStyle = MaterialTheme.typography.labelLarge
+                val density = LocalDensity.current
+
+                val totalTextWidth = remember(modes, textStyle, density) {
+                    modes.sumOf { mode ->
+                        textMeasurer.measure(mode, textStyle).size.width
+                    }
+                }
+                val buttonPadding = with(density) { (24.dp * modes.size).roundToPx() }
+                val estimatedWidth = totalTextWidth + buttonPadding
+                val availableWidth = with(density) { maxWidth.roundToPx() }
+
+                val useDropdown = estimatedWidth > availableWidth
+
+                if (useDropdown) {
+                    ModeDropdown(
+                        modes = modes,
+                        selectedMode = selectedMode,
+                        onModeSelected = onModeSelected,
+                    )
+                } else {
                     SingleChoiceSegmentedButtonRow(
                         modifier = Modifier.fillMaxWidth(),
                     ) {
@@ -82,3 +123,71 @@ fun ClashModeCard(
                 }
             }
         }
+    }
+}
+
+@Composable
+private fun ModeDropdown(
+    modes: List<String>,
+    selectedMode: String,
+    onModeSelected: (String) -> Unit,
+) {
+    var expanded by remember { mutableStateOf(false) }
+
+    Box(modifier = Modifier.fillMaxWidth()) {
+        Surface(
+            onClick = { expanded = true },
+            shape = RoundedCornerShape(12.dp),
+            color = if (isSystemInDarkTheme()) {
+                MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.5f)
+            } else {
+                MaterialTheme.colorScheme.surfaceDim
+            },
+            modifier = Modifier.fillMaxWidth(),
+        ) {
+            Row(
+                modifier =
+                    Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 12.dp),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Text(
+                    text = selectedMode,
+                    style = MaterialTheme.typography.bodyLarge,
+                    modifier = Modifier.weight(1f),
+                )
+                Icon(
+                    imageVector = Icons.Default.UnfoldMore,
+                    contentDescription = null,
+                    modifier = Modifier.size(20.dp),
+                    tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+
+        DropdownMenu(
+            expanded = expanded,
+            onDismissRequest = { expanded = false },
+        ) {
+            modes.forEach { mode ->
+                DropdownMenuItem(
+                    text = { Text(mode) },
+                    onClick = {
+                        onModeSelected(mode)
+                        expanded = false
+                    },
+                    leadingIcon = {
+                        if (mode == selectedMode) {
+                            Icon(
+                                imageVector = Icons.Default.Check,
+                                contentDescription = null,
+                                tint = MaterialTheme.colorScheme.primary,
+                            )
+                        }
+                    },
+                )
+            }
+        }
+    }
+}