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key: number; children: React.ReactNode }\n | { type: 'update'; key: number; children: React.ReactNode }\n | { type: 'unmount'; key: number };\n\nexport type PortalMethods = {\n mount: (children: React.ReactNode) => number;\n update: (key: number, children: React.ReactNode) => void;\n unmount: (key: number) => void;\n};\n\nexport const PortalContext = React.createContext<PortalMethods>(null as any);\n\n/**\n * Portal host renders all of its children `Portal` elements.\n * For example, you can wrap a screen in `Portal.Host` to render items above the screen.\n * If you're using the `Provider` component, it already includes `Portal.Host`.\n *\n * ## Usage\n * ```js\n * import * as React from 'react';\n * import { Text } from 'react-native';\n * import { Portal } from 'react-native-paper';\n *\n * const MyComponent = () => (\n * <Portal.Host>\n * <Text>Content of the app</Text>\n * </Portal.Host>\n * );\n *\n * export default MyComponent;\n * ```\n *\n * Here any `Portal` elements under `<App />` are rendered alongside `<App />` and will appear above `<App />` like a `Modal`.\n */\nexport default class PortalHost extends React.Component<Props> {\n static displayName = 'Portal.Host';\n\n componentDidMount() {\n const manager = this.manager;\n const queue = this.queue;\n\n while (queue.length && manager) {\n const action = queue.pop();\n if (action) {\n // eslint-disable-next-line default-case\n switch (action.type) {\n case 'mount':\n manager.mount(action.key, action.children);\n break;\n case 'update':\n manager.update(action.key, action.children);\n break;\n case 'unmount':\n manager.unmount(action.key);\n break;\n }\n }\n }\n }\n\n private setManager = (manager: PortalManager | undefined | null) => {\n this.manager = manager;\n };\n\n private mount = (children: React.ReactNode) => {\n const key = this.nextKey++;\n\n if (this.manager) {\n this.manager.mount(key, children);\n } else {\n this.queue.push({ type: 'mount', key, children });\n }\n\n return key;\n };\n\n private update = (key: number, children: React.ReactNode) => {\n if (this.manager) {\n this.manager.update(key, children);\n } else {\n const op: Operation = { type: 'mount', key, children };\n const index = this.queue.findIndex(\n (o) => o.type === 'mount' || (o.type === 'update' && o.key === key)\n );\n\n if (index > -1) {\n this.queue[index] = op;\n } else {\n this.queue.push(op as Operation);\n }\n }\n };\n\n private unmount = (key: number) => {\n if (this.manager) {\n this.manager.unmount(key);\n } else {\n this.queue.push({ type: 'unmount', key });\n }\n };\n\n private nextKey = 0;\n private queue: Operation[] = [];\n private manager: PortalManager | null | undefined;\n\n render() {\n return (\n <PortalContext.Provider\n value={{\n mount: this.mount,\n update: this.update,\n unmount: this.unmount,\n }}\n >\n {/* Need collapsable=false here to clip the elevations, otherwise they appear above Portal components */}\n <View\n style={styles.container}\n collapsable={false}\n pointerEvents=\"box-none\"\n >\n {this.props.children}\n </View>\n <PortalManager ref={this.setManager} />\n </PortalContext.Provider>\n );\n }\n}\n\nconst styles = StyleSheet.create({\n container: {\n flex: 1,\n },\n});\n"]} |