| 1 | import { useCallback, useRef, useState, type ComponentProps } from "react"; |
| 2 | import { |
| 3 | useWindowDimensions, |
| 4 | View, |
| 5 | type NativeScrollEvent, |
| 6 | type NativeSyntheticEvent, |
| 7 | } from "react-native"; |
| 8 | import { useSafeAreaInsets } from "react-native-safe-area-context"; |
| 9 | import { MaterialNewThreadButton } from "../../components/MaterialNewThreadButton"; |
| 10 | import type { AndroidHomeFabLayout as SharedAndroidHomeFabLayout } from "./AndroidHomeFab.shared"; |
| 11 | import { useWorkspaceState } from "../../state/workspace"; |
| 12 | import { MaterialFabScrollContext } from "./MaterialFabScrollContext"; |
| 13 | import { updateMaterialFabScroll } from "./material-fab-scroll"; |
| 14 | import { useAppearancePreferences } from "../settings/appearance/AppearancePreferencesProvider"; |
| 15 | |
| 16 | export function AndroidHomeFabLayout(props: ComponentProps<typeof SharedAndroidHomeFabLayout>) { |
| 17 | const insets = useSafeAreaInsets(); |
| 18 | const { appearance } = useAppearancePreferences(); |
| 19 | const { fontScale } = useWindowDimensions(); |
| 20 | const [layoutWidth, setLayoutWidth] = useState<number | null>(null); |
| 21 | const { state } = useWorkspaceState(); |
| 22 | const [expanded, setExpanded] = useState(true); |
| 23 | const scrollState = useRef({ anchor: 0, expanded: true }); |
| 24 | const onScroll = useCallback((event: NativeSyntheticEvent<NativeScrollEvent>) => { |
| 25 | const { contentOffset, contentSize, layoutMeasurement } = event.nativeEvent; |
| 26 | const next = updateMaterialFabScroll( |
| 27 | scrollState.current, |
| 28 | contentOffset.y, |
| 29 | contentSize.height - layoutMeasurement.height, |
| 30 | ); |
| 31 | if (next.expanded !== scrollState.current.expanded) setExpanded(next.expanded); |
| 32 | scrollState.current = next; |
| 33 | }, []); |
| 34 | |
| 35 | // Remount only the FAB when its font or pane changes to clear the cached expanded width. |
| 36 | return ( |
| 37 | <View className="flex-1" onLayout={(event) => setLayoutWidth(event.nativeEvent.layout.width)}> |
| 38 | <MaterialFabScrollContext value={onScroll}>{props.children}</MaterialFabScrollContext> |
| 39 | {!props.disabled && state.hasConnections && layoutWidth !== null ? ( |
| 40 | <MaterialNewThreadButton |
| 41 | key={`${appearance.baseFontSize}:${fontScale}:${layoutWidth}`} |
| 42 | extended |
| 43 | expanded={expanded} |
| 44 | onPress={props.onStartNewTask} |
| 45 | className="absolute right-5" |
| 46 | style={{ |
| 47 | bottom: props.sidebar |
| 48 | ? Math.max(insets.bottom, 12) + 6 |
| 49 | : Math.max(insets.bottom, 16) + 16, |
| 50 | }} |
| 51 | /> |
| 52 | ) : null} |
| 53 | </View> |
| 54 | ); |
| 55 | } |