Add HAFloatingActionButton component

common/src/main/kotlin/io/homeassistant/companion/android/common/compose/composable/HAFloatingActionButton.kt

@@ -0,0 +1,98 @@
+package io.homeassistant.companion.android.common.compose.composable
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material3.FloatingActionButton
+import androidx.compose.material3.Icon
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.tooling.preview.PreviewLightDark
+import io.homeassistant.companion.android.common.compose.theme.HAColorScheme
+import io.homeassistant.companion.android.common.compose.theme.HADimens
+import io.homeassistant.companion.android.common.compose.theme.HAThemeForPreview
+import io.homeassistant.companion.android.common.compose.theme.LocalHAColorScheme
+
+/**
+ * Displays a circular floating action button (FAB) with a single icon, themed with the Home
+ * Assistant color scheme.
+ *
+ * @param icon The [ImageVector] icon to be displayed in the button.
+ * @param onClick The lambda function to be executed when the button is clicked.
+ * @param contentDescription The content description for accessibility purposes.
+ * @param modifier Optional [androidx.compose.ui.Modifier] to be applied to the button.
+ * @param variant The [ButtonVariant] that determines the button's color scheme. Defaults to [ButtonVariant.PRIMARY].
+ */
+@Composable
+fun HAFloatingActionButton(
+    icon: ImageVector,
+    onClick: () -> Unit,
+    contentDescription: String?,
+    modifier: Modifier = Modifier,
+    variant: ButtonVariant = ButtonVariant.PRIMARY,
+) {
+    val colors = LocalHAColorScheme.current.fabColorsFromVariant(variant)
+    FloatingActionButton(
+        onClick = onClick,
+        modifier = modifier.size(ButtonSize.LARGE.value),
+        containerColor = colors.containerColor,
+        contentColor = colors.contentColor,
+        content = {
+            Icon(
+                imageVector = icon,
+                contentDescription = contentDescription,
+                modifier = Modifier.size(HADimens.SPACE6),
+            )
+        },
+    )
+}
+
+private data class HAFabColors(val containerColor: Color, val contentColor: Color)
+
+private fun HAColorScheme.fabColorsFromVariant(variant: ButtonVariant): HAFabColors = when (variant) {
+    ButtonVariant.PRIMARY -> HAFabColors(
+        containerColor = colorFillPrimaryLoudResting,
+        contentColor = colorOnPrimaryLoud,
+    )
+
+    ButtonVariant.NEUTRAL -> HAFabColors(
+        containerColor = colorFillNeutralLoudResting,
+        contentColor = colorOnNeutralLoud,
+    )
+
+    ButtonVariant.DANGER -> HAFabColors(
+        containerColor = colorFillDangerLoudResting,
+        contentColor = colorOnDangerLoud,
+    )
+
+    ButtonVariant.WARNING -> HAFabColors(
+        containerColor = colorFillWarningLoudResting,
+        contentColor = colorOnWarningLoud,
+    )
+
+    ButtonVariant.SUCCESS -> HAFabColors(
+        containerColor = colorFillSuccessLoudResting,
+        contentColor = colorOnSuccessLoud,
+    )
+}
+
+@PreviewLightDark
+@Composable
+private fun HAFloatingActionButtonPreview() {
+    HAThemeForPreview {
+        Column(verticalArrangement = Arrangement.spacedBy(HADimens.SPACE2)) {
+            ButtonVariant.entries.forEach { variant ->
+                HAFloatingActionButton(
+                    icon = Icons.Default.Add,
+                    variant = variant,
+                    contentDescription = null,
+                    onClick = {},
+                )
+            }
+        }
+    }
+}

common/src/screenshotTest/kotlin/io/homeassistant/companion/android/compose/composable/HAFloatingActionButtonScreenshotTest.kt

@@ -0,0 +1,35 @@
+package io.homeassistant.companion.android.compose.composable
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.tooling.preview.PreviewLightDark
+import com.android.tools.screenshot.PreviewTest
+import io.homeassistant.companion.android.common.compose.composable.ButtonVariant
+import io.homeassistant.companion.android.common.compose.composable.HAFloatingActionButton
+import io.homeassistant.companion.android.common.compose.theme.HAThemeForPreview
+
+class HAFloatingActionButtonScreenshotTest {
+
+    @PreviewLightDark
+    @PreviewTest
+    @Composable
+    fun `HAFloatingActionButton variants`() {
+        HAThemeForPreview {
+            Column {
+                ButtonVariant.entries.forEach { variant ->
+                    Row {
+                        HAFloatingActionButton(
+                            icon = Icons.Default.Add,
+                            variant = variant,
+                            contentDescription = null,
+                            onClick = {},
+                        )
+                    }
+                }
+            }
+        }
+    }
+}