GoScrobble/web/node_modules/@material-ui/styles/es/makeStyles/makeStyles.js

import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/esm/objectWithoutPropertiesLoose";
import _extends from "@babel/runtime/helpers/esm/extends";
import React from 'react';
import { getDynamicStyles } from 'jss';
import mergeClasses from '../mergeClasses';
import multiKeyStore from './multiKeyStore';
import useTheme from '../useTheme';
import { StylesContext } from '../StylesProvider';
import { increment } from './indexCounter';
import getStylesCreator from '../getStylesCreator';
import noopTheme from '../getStylesCreator/noopTheme';

function getClasses({
  state,
  stylesOptions
}, classes, Component) {
  if (stylesOptions.disableGeneration) {
    return classes || {};
  }

  if (!state.cacheClasses) {
    state.cacheClasses = {
      // Cache for the finalized classes value.
      value: null,
      // Cache for the last used classes prop pointer.
      lastProp: null,
      // Cache for the last used rendered classes pointer.
      lastJSS: {}
    };
  } // Tracks if either the rendered classes or classes prop has changed,
  // requiring the generation of a new finalized classes object.


  let generate = false;

  if (state.classes !== state.cacheClasses.lastJSS) {
    state.cacheClasses.lastJSS = state.classes;
    generate = true;
  }

  if (classes !== state.cacheClasses.lastProp) {
    state.cacheClasses.lastProp = classes;
    generate = true;
  }

  if (generate) {
    state.cacheClasses.value = mergeClasses({
      baseClasses: state.cacheClasses.lastJSS,
      newClasses: classes,
      Component
    });
  }

  return state.cacheClasses.value;
}

function attach({
  state,
  theme,
  stylesOptions,
  stylesCreator,
  name
}, props) {
  if (stylesOptions.disableGeneration) {
    return;
  }

  let sheetManager = multiKeyStore.get(stylesOptions.sheetsManager, stylesCreator, theme);

  if (!sheetManager) {
    sheetManager = {
      refs: 0,
      staticSheet: null,
      dynamicStyles: null
    };
    multiKeyStore.set(stylesOptions.sheetsManager, stylesCreator, theme, sheetManager);
  }

  const options = _extends({}, stylesCreator.options, stylesOptions, {
    theme,
    flip: typeof stylesOptions.flip === 'boolean' ? stylesOptions.flip : theme.direction === 'rtl'
  });

  options.generateId = options.serverGenerateClassName || options.generateClassName;
  const sheetsRegistry = stylesOptions.sheetsRegistry;

  if (sheetManager.refs === 0) {
    let staticSheet;

    if (stylesOptions.sheetsCache) {
      staticSheet = multiKeyStore.get(stylesOptions.sheetsCache, stylesCreator, theme);
    }

    const styles = stylesCreator.create(theme, name);

    if (!staticSheet) {
      staticSheet = stylesOptions.jss.createStyleSheet(styles, _extends({
        link: false
      }, options));
      staticSheet.attach();

      if (stylesOptions.sheetsCache) {
        multiKeyStore.set(stylesOptions.sheetsCache, stylesCreator, theme, staticSheet);
      }
    }

    if (sheetsRegistry) {
      sheetsRegistry.add(staticSheet);
    }

    sheetManager.staticSheet = staticSheet;
    sheetManager.dynamicStyles = getDynamicStyles(styles);
  }

  if (sheetManager.dynamicStyles) {
    const dynamicSheet = stylesOptions.jss.createStyleSheet(sheetManager.dynamicStyles, _extends({
      link: true
    }, options));
    dynamicSheet.update(props);
    dynamicSheet.attach();
    state.dynamicSheet = dynamicSheet;
    state.classes = mergeClasses({
      baseClasses: sheetManager.staticSheet.classes,
      newClasses: dynamicSheet.classes
    });

    if (sheetsRegistry) {
      sheetsRegistry.add(dynamicSheet);
    }
  } else {
    state.classes = sheetManager.staticSheet.classes;
  }

  sheetManager.refs += 1;
}

function update({
  state
}, props) {
  if (state.dynamicSheet) {
    state.dynamicSheet.update(props);
  }
}

function detach({
  state,
  theme,
  stylesOptions,
  stylesCreator
}) {
  if (stylesOptions.disableGeneration) {
    return;
  }

  const sheetManager = multiKeyStore.get(stylesOptions.sheetsManager, stylesCreator, theme);
  sheetManager.refs -= 1;
  const sheetsRegistry = stylesOptions.sheetsRegistry;

  if (sheetManager.refs === 0) {
    multiKeyStore.delete(stylesOptions.sheetsManager, stylesCreator, theme);
    stylesOptions.jss.removeStyleSheet(sheetManager.staticSheet);

    if (sheetsRegistry) {
      sheetsRegistry.remove(sheetManager.staticSheet);
    }
  }

  if (state.dynamicSheet) {
    stylesOptions.jss.removeStyleSheet(state.dynamicSheet);

    if (sheetsRegistry) {
      sheetsRegistry.remove(state.dynamicSheet);
    }
  }
}

function useSynchronousEffect(func, values) {
  const key = React.useRef([]);
  let output; // Store "generation" key. Just returns a new object every time

  const currentKey = React.useMemo(() => ({}), values); // eslint-disable-line react-hooks/exhaustive-deps
  // "the first render", or "memo dropped the value"

  if (key.current !== currentKey) {
    key.current = currentKey;
    output = func();
  }

  React.useEffect(() => () => {
    if (output) {
      output();
    }
  }, [currentKey] // eslint-disable-line react-hooks/exhaustive-deps
  );
}

export default function makeStyles(stylesOrCreator, options = {}) {
  const {
    // alias for classNamePrefix, if provided will listen to theme (required for theme.overrides)
    name,
    // Help with debuggability.
    classNamePrefix: classNamePrefixOption,
    Component,
    defaultTheme = noopTheme
  } = options,
        stylesOptions2 = _objectWithoutPropertiesLoose(options, ["name", "classNamePrefix", "Component", "defaultTheme"]);

  const stylesCreator = getStylesCreator(stylesOrCreator);
  const classNamePrefix = name || classNamePrefixOption || 'makeStyles';
  stylesCreator.options = {
    index: increment(),
    name,
    meta: classNamePrefix,
    classNamePrefix
  };

  const useStyles = (props = {}) => {
    const theme = useTheme() || defaultTheme;

    const stylesOptions = _extends({}, React.useContext(StylesContext), stylesOptions2);

    const instance = React.useRef();
    const shouldUpdate = React.useRef();
    useSynchronousEffect(() => {
      const current = {
        name,
        state: {},
        stylesCreator,
        stylesOptions,
        theme
      };
      attach(current, props);
      shouldUpdate.current = false;
      instance.current = current;
      return () => {
        detach(current);
      };
    }, [theme, stylesCreator]);
    React.useEffect(() => {
      if (shouldUpdate.current) {
        update(instance.current, props);
      }

      shouldUpdate.current = true;
    });
    const classes = getClasses(instance.current, props.classes, Component);

    if (process.env.NODE_ENV !== 'production') {
      // eslint-disable-next-line react-hooks/rules-of-hooks
      React.useDebugValue(classes);
    }

    return classes;
  };

  return useStyles;
}