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Viewing file:     emotion-sheet.cjs.dev.js (4.44 KB)      -rw-r--r--

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

/*

Based off glamor's StyleSheet, thanks Sunil ❤️

high performance StyleSheet for css-in-js systems

- uses multiple style tags behind the scenes for millions of rules
- uses `insertRule` for appending in production for *much* faster performance

// usage

import { StyleSheet } from '@emotion/sheet'

let styleSheet = new StyleSheet({ key: '', container: document.head })

styleSheet.insert('#box { border: 1px solid red; }')
- appends a css rule into the stylesheet

styleSheet.flush()
- empties the stylesheet of all its contents

*/
// $FlowFixMe
function sheetForTag(tag) {
  if (tag.sheet) {
    // $FlowFixMe
    return tag.sheet;
  } // this weirdness brought to you by firefox

  /* istanbul ignore next */


  for (var i = 0; i < document.styleSheets.length; i++) {
    if (document.styleSheets[i].ownerNode === tag) {
      // $FlowFixMe
      return document.styleSheets[i];
    }
  }
}

function createStyleElement(options) {
  var tag = document.createElement('style');
  tag.setAttribute('data-emotion', options.key);

  if (options.nonce !== undefined) {
    tag.setAttribute('nonce', options.nonce);
  }

  tag.appendChild(document.createTextNode(''));
  tag.setAttribute('data-s', '');
  return tag;
}

var StyleSheet = /*#__PURE__*/function () {
  function StyleSheet(options) {
    var _this = this;

    this._insertTag = function (tag) {
      var before;

      if (_this.tags.length === 0) {
        before = _this.prepend ? _this.container.firstChild : _this.before;
      } else {
        before = _this.tags[_this.tags.length - 1].nextSibling;
      }

      _this.container.insertBefore(tag, before);

      _this.tags.push(tag);
    };

    this.isSpeedy = options.speedy === undefined ? process.env.NODE_ENV === 'production' : options.speedy;
    this.tags = [];
    this.ctr = 0;
    this.nonce = options.nonce; // key is the value of the data-emotion attribute, it's used to identify different sheets

    this.key = options.key;
    this.container = options.container;
    this.prepend = options.prepend;
    this.before = null;
  }

  var _proto = StyleSheet.prototype;

  _proto.hydrate = function hydrate(nodes) {
    nodes.forEach(this._insertTag);
  };

  _proto.insert = function insert(rule) {
    // the max length is how many rules we have per style tag, it's 65000 in speedy mode
    // it's 1 in dev because we insert source maps that map a single rule to a location
    // and you can only have one source map per style tag
    if (this.ctr % (this.isSpeedy ? 65000 : 1) === 0) {
      this._insertTag(createStyleElement(this));
    }

    var tag = this.tags[this.tags.length - 1];

    if (process.env.NODE_ENV !== 'production') {
      var isImportRule = rule.charCodeAt(0) === 64 && rule.charCodeAt(1) === 105;

      if (isImportRule && this._alreadyInsertedOrderInsensitiveRule) {
        // this would only cause problem in speedy mode
        // but we don't want enabling speedy to affect the observable behavior
        // so we report this error at all times
        console.error("You're attempting to insert the following rule:\n" + rule + '\n\n`@import` rules must be before all other types of rules in a stylesheet but other rules have already been inserted. Please ensure that `@import` rules are before all other rules.');
      }
      this._alreadyInsertedOrderInsensitiveRule = this._alreadyInsertedOrderInsensitiveRule || !isImportRule;
    }

    if (this.isSpeedy) {
      var sheet = sheetForTag(tag);

      try {
        // this is the ultrafast version, works across browsers
        // the big drawback is that the css won't be editable in devtools
        sheet.insertRule(rule, sheet.cssRules.length);
      } catch (e) {
        if (process.env.NODE_ENV !== 'production' && !/:(-moz-placeholder|-moz-focus-inner|-moz-focusring|-ms-input-placeholder|-moz-read-write|-moz-read-only|-ms-clear){/.test(rule)) {
          console.error("There was a problem inserting the following rule: \"" + rule + "\"", e);
        }
      }
    } else {
      tag.appendChild(document.createTextNode(rule));
    }

    this.ctr++;
  };

  _proto.flush = function flush() {
    // $FlowFixMe
    this.tags.forEach(function (tag) {
      return tag.parentNode.removeChild(tag);
    });
    this.tags = [];
    this.ctr = 0;

    if (process.env.NODE_ENV !== 'production') {
      this._alreadyInsertedOrderInsensitiveRule = false;
    }
  };

  return StyleSheet;
}();

exports.StyleSheet = StyleSheet;