@dnb/eufemia/components/heading/HeadingProvider.js

DNB Eufemia Design System UI Library

import React from 'react';
import { isTrue } from "../../shared/component-helper.js";
import HeadingContext from "./HeadingContext.js";
import { globalSyncCounter, globalHeadingCounter, correctInternalHeadingLevel, windupHeadings, teardownHeadings, debugCounter } from "./HeadingHelpers.js";
import { initCounter } from "./HeadingCounter.js";
export default function HeadingProvider(props) {
  const context = React.useContext(HeadingContext);
  const [state, setState] = React.useState(() => {
    const state = {
      context,
      _listenForPropChanges: true
    };
    const existingContext = context.heading;
    state.counter = initCounter(props);
    state.newProps = props;
    if (existingContext) {
      state.newProps = {
        ...existingContext,
        ...props
      };
    }
    if (existingContext) {
      state.counter.setContextCounter(existingContext.counter);
    } else {
      state.counter.setContextCounter(globalHeadingCounter.current);
    }
    state.counter = correctInternalHeadingLevel({
      counter: state.counter,
      ref: props,
      level: parseFloat(String(props.level)),
      inherit: isTrue(props.inherit),
      reset: props.reset,
      increase: isTrue(props.increase) || isTrue(props.up),
      decrease: isTrue(props.decrease) || isTrue(props.down),
      bypassChecks: isTrue(state.newProps.skip_correction),
      source: props.text || props.children,
      debug: state.newProps.debug
    });
    globalSyncCounter.current = state.counter;
    state.level = state.counter.level;
    state.prevLevel = parseFloat(String(state.newProps.level)) || state.counter.level;
    return state;
  });
  React.useEffect(() => {
    const level = parseFloat(String(props.level));
    if (state.prevLevel !== props.level && level > 0 && level !== state.level) {
      var _state$context$headin, _state$context$headin2;
      const {
        level: newLevel
      } = correctInternalHeadingLevel({
        counter: state.counter,
        level,
        bypassChecks: isTrue(props.skip_correction) || isTrue((_state$context$headin = state.context.heading) === null || _state$context$headin === void 0 ? void 0 : _state$context$headin.skip_correction),
        source: props.text || props.children,
        debug: props.debug || ((_state$context$headin2 = state.context.heading) === null || _state$context$headin2 === void 0 ? void 0 : _state$context$headin2.debug)
      });
      state.level = state.prevLevel = newLevel;
      setState({
        ...state
      });
    }
  }, [props.level]);
  React.useEffect(() => {
    windupHeadings();
    return () => {
      teardownHeadings();
    };
  }, []);
  return React.createElement(HeadingContext.Provider, {
    value: {
      heading: {
        ...state.newProps,
        ...state
      }
    }
  }, state.newProps.debug_counter && React.createElement("span", {
    className: "dnb-heading__context"
  }, React.createElement("span", {
    className: "dnb-heading__debug"
  }, "Context:", ' ', React.createElement("span", {
    className: "dnb-code"
  }, debugCounter(state.counter))), props.children) || props.children);
}
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