react-native-bars/dist/module/NavigationBar.js

Components to control your app status and navigation bars.

import * as React from "react";
import { Platform } from "react-native";
import NativeModule from "./NativeRNBars";
const isSupportedPlatform = Platform.OS === "android" && Platform.Version >= 27;
function createStackEntry({
  barStyle = "light-content"
}) {
  return {
    barStyle
  };
}
export class NavigationBar extends React.Component {
  static propsStack = [];
  static immediate = null;
  static mergedProps = null;
  static pushStackEntry(props) {
    const entry = createStackEntry(props);
    NavigationBar.propsStack.push(entry);
    NavigationBar.updatePropsStack();
    return entry;
  }
  static popStackEntry(entry) {
    const index = NavigationBar.propsStack.indexOf(entry);
    if (index !== -1) {
      NavigationBar.propsStack.splice(index, 1);
    }
    NavigationBar.updatePropsStack();
  }
  static replaceStackEntry(entry, props) {
    const newEntry = createStackEntry(props);
    const index = NavigationBar.propsStack.indexOf(entry);
    if (index !== -1) {
      NavigationBar.propsStack[index] = newEntry;
    }
    NavigationBar.updatePropsStack();
    return newEntry;
  }
  static updatePropsStack() {
    // Send the update to the native module only once at the end of the frame.
    if (NavigationBar.immediate !== null) {
      clearImmediate(NavigationBar.immediate);
    }
    NavigationBar.immediate = setImmediate(() => {
      const oldProps = NavigationBar.mergedProps;
      const lastEntry = NavigationBar.propsStack[NavigationBar.propsStack.length - 1];
      if (lastEntry != null) {
        // Update only if style have changed or if current props are unavailable.
        if (isSupportedPlatform && oldProps?.barStyle !== lastEntry.barStyle) {
          NativeModule?.setNavigationBarStyle(lastEntry.barStyle);
        }

        // Update the current props values.
        NavigationBar.mergedProps = {
          ...lastEntry
        };
      } else {
        // Reset current props when the stack is empty.
        NavigationBar.mergedProps = null;
      }
    });
  }
  stackEntry = null;
  componentDidMount() {
    this.stackEntry = NavigationBar.pushStackEntry(this.props);
  }
  componentDidUpdate() {
    if (this.stackEntry) {
      this.stackEntry = NavigationBar.replaceStackEntry(this.stackEntry, this.props);
    }
  }
  componentWillUnmount() {
    if (this.stackEntry) {
      NavigationBar.popStackEntry(this.stackEntry);
    }
  }
  render() {
    return null;
  }
}
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