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import React, { useCallback, useContext, useLayoutEffect, useRef } from 'react';
import { colors } from '../../config.json';
import { messages } from '../../shared/gettext';
import useActions from '../lib/actionsHook';
import { useHistory } from '../lib/history';
import { useCombinedRefs } from '../lib/utilityHooks';
import { useSelector } from '../redux/store';
import userInterface from '../redux/userinterface/actions';
import CustomScrollbars, { CustomScrollbarsRef, IScrollEvent } from './CustomScrollbars';
import {
StyledBackBarItemButton,
StyledBackBarItemIcon,
StyledBackBarItemLabel,
StyledCloseBarItemButton,
StyledCloseBarItemIcon,
StyledNavigationBar,
StyledNavigationBarSeparator,
StyledTitleBarItemLabel,
} from './NavigationBarStyles';
export { StyledNavigationItems as NavigationItems } from './NavigationBarStyles';
interface INavigationContainerProps {
children?: React.ReactNode;
}
interface INavigationContainerState {
showsBarTitle: boolean;
showsBarSeparator: boolean;
}
const NavigationScrollContext = React.createContext({
showsBarTitle: false,
showsBarSeparator: false,
onScroll(_event: IScrollEvent): void {
throw Error('NavigationScrollContext provider missing');
},
});
export class NavigationContainer extends React.Component<
INavigationContainerProps,
INavigationContainerState
> {
public state = {
showsBarTitle: false,
showsBarSeparator: false,
};
private scrollEventListeners: Array<(event: IScrollEvent) => void> = [];
public componentDidMount() {
this.updateBarAppearance({ scrollLeft: 0, scrollTop: 0 });
}
public render() {
return (
<NavigationScrollContext.Provider
value={{
...this.state,
onScroll: this.onScroll,
}}>
{this.props.children}
</NavigationScrollContext.Provider>
);
}
public onScroll = (event: IScrollEvent) => {
this.notifyScrollEventListeners(event);
this.updateBarAppearance(event);
};
public addScrollEventListener(fn: (event: IScrollEvent) => void) {
const index = this.scrollEventListeners.indexOf(fn);
if (index === -1) {
this.scrollEventListeners.push(fn);
}
}
public removeScrollEventListener(fn: (event: IScrollEvent) => void) {
const index = this.scrollEventListeners.indexOf(fn);
if (index !== -1) {
this.scrollEventListeners.splice(index, 1);
}
}
private notifyScrollEventListeners(event: IScrollEvent) {
this.scrollEventListeners.forEach((listener) => listener(event));
}
private updateBarAppearance(event: IScrollEvent) {
// that's where SettingsHeader.HeaderTitle intersects the navigation bar
const showsBarSeparator = event.scrollTop > 11;
// that's when SettingsHeader.HeaderTitle goes behind the navigation bar
const showsBarTitle = event.scrollTop > 20;
if (
this.state.showsBarSeparator !== showsBarSeparator ||
this.state.showsBarTitle !== showsBarTitle
) {
this.setState({ showsBarSeparator, showsBarTitle });
}
}
}
interface INavigationScrollbarsProps {
onScroll?: (value: IScrollEvent) => void;
className?: string;
fillContainer?: boolean;
children?: React.ReactNode;
}
export const NavigationScrollbars = React.forwardRef(function NavigationScrollbarsT(
props: INavigationScrollbarsProps,
forwardedRef?: React.Ref<CustomScrollbarsRef>,
) {
const history = useHistory();
const { onScroll } = useContext(NavigationScrollContext);
const ref = useRef<CustomScrollbarsRef>();
const combinedRefs = useCombinedRefs(forwardedRef, ref);
const { addScrollPosition, removeScrollPosition } = useActions(userInterface);
const scrollPosition = useSelector(
(state) => state.userInterface.scrollPosition[history.location.pathname],
);
useLayoutEffect(() => {
const path = history.location.pathname;
if (history.action === 'POP' && scrollPosition) {
ref.current?.scrollTo(...scrollPosition);
removeScrollPosition(path);
}
return () => {
if (history.action === 'PUSH' && ref.current) {
addScrollPosition(path, ref.current.getScrollPosition());
}
};
}, []);
const handleScroll = useCallback((event: IScrollEvent) => {
onScroll(event);
props.onScroll?.(event);
}, []);
return (
<CustomScrollbars
ref={combinedRefs}
className={props.className}
fillContainer={props.fillContainer}
onScroll={handleScroll}>
{props.children}
</CustomScrollbars>
);
});
const TitleBarItemContext = React.createContext({
visible: false,
});
interface INavigationBarProps {
children?: React.ReactNode;
alwaysDisplayBarTitle?: boolean;
}
export const NavigationBar = function NavigationBarT(props: INavigationBarProps) {
const { showsBarSeparator, showsBarTitle } = useContext(NavigationScrollContext);
const unpinnedWindow = useSelector((state) => state.settings.guiSettings.unpinnedWindow);
return (
<StyledNavigationBar unpinnedWindow={unpinnedWindow}>
<TitleBarItemContext.Provider
value={{ visible: props.alwaysDisplayBarTitle || showsBarTitle }}>
{props.children}
</TitleBarItemContext.Provider>
{showsBarSeparator && <StyledNavigationBarSeparator />}
</StyledNavigationBar>
);
};
interface ITitleBarItemProps {
children?: React.ReactText;
}
export const TitleBarItem = React.memo(function TitleBarItemT(props: ITitleBarItemProps) {
const { visible } = useContext(TitleBarItemContext);
return <StyledTitleBarItemLabel visible={visible}>{props.children}</StyledTitleBarItemLabel>;
});
interface ICloseBarItemProps {
action: () => void;
}
export function CloseBarItem(props: ICloseBarItemProps) {
return (
<StyledCloseBarItemButton aria-label={messages.gettext('Close')} onClick={props.action}>
<StyledCloseBarItemIcon
height={24}
width={24}
source={'icon-close-down'}
tintColor={colors.white40}
tintHoverColor={colors.white60}
/>
</StyledCloseBarItemButton>
);
}
interface IBackBarItemProps {
children?: React.ReactText;
action: () => void;
}
export function BackBarItem(props: IBackBarItemProps) {
return (
<StyledBackBarItemButton onClick={props.action}>
<StyledBackBarItemIcon source="icon-back" tintColor={colors.white40} />
<StyledBackBarItemLabel>{props.children}</StyledBackBarItemLabel>
</StyledBackBarItemButton>
);
}
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