{"ast":null,"code":"Object.defineProperty(exports,\"__esModule\",{value:true});exports.default=createOrderedCSSStyleSheet;var slice=Array.prototype.slice;function createOrderedCSSStyleSheet(sheet){var groups={};var selectors={};if(sheet!=null){var group;slice.call(sheet.cssRules).forEach(function(cssRule,i){var cssText=cssRule.cssText;if(cssText.indexOf('stylesheet-group')>-1){group=decodeGroupRule(cssRule);groups[group]={start:i,rules:[cssText]};}else{var selectorText=getSelectorText(cssText);if(selectorText!=null){selectors[selectorText]=true;groups[group].rules.push(cssText);}}});}function sheetInsert(sheet,group,text){var orderedGroups=getOrderedGroups(groups);var groupIndex=orderedGroups.indexOf(group);var nextGroupIndex=groupIndex+1;var nextGroup=orderedGroups[nextGroupIndex];var position=nextGroup!=null&&groups[nextGroup].start!=null?groups[nextGroup].start:sheet.cssRules.length;var 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isInserted=sheetInsert(sheet,group,cssText);if(!isInserted){groups[group].rules.pop();}}}}};return OrderedCSSStyleSheet;}function encodeGroupRule(group){return\"[stylesheet-group=\\\"\"+group+\"\\\"]{}\";}function decodeGroupRule(cssRule){return Number(cssRule.selectorText.split(/[\"']/)[1]);}function getOrderedGroups(obj){return Object.keys(obj).map(Number).sort(function(a,b){return a>b?1:-1;});}var pattern=/\\s*([,])\\s*/g;function getSelectorText(cssText){var selector=cssText.split('{')[0].trim();return selector!==''?selector.replace(pattern,'$1'):null;}function insertRuleAt(root,cssText,position){try{root.insertRule(cssText,position);return true;}catch(e){return 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The selector of the first rule of\n * each group is used only to encode the group number for hydration. An\n * alternative implementation could rely on CSSMediaRule, allowing groups to be\n * treated as a sub-sheet, but the Edge implementation of CSSMediaRule is\n * broken.\n * https://developer.mozilla.org/en-US/docs/Web/API/CSSMediaRule\n * https://gist.github.com/necolas/aa0c37846ad6bd3b05b727b959e82674\n */\n\nexport default function createOrderedCSSStyleSheet(sheet) {\n  var groups = {};\n  var selectors = {};\n  /**\n   * Hydrate approximate record from any existing rules in the sheet.\n   */\n\n  if (sheet != null) {\n    var group;\n    slice.call(sheet.cssRules).forEach(function (cssRule, i) {\n      var cssText = cssRule.cssText; // Create record of existing selectors and rules\n\n      if (cssText.indexOf('stylesheet-group') > -1) {\n        group = decodeGroupRule(cssRule);\n        groups[group] = {\n          start: i,\n          rules: [cssText]\n        };\n      } else {\n        var selectorText = getSelectorText(cssText);\n\n        if (selectorText != null) {\n          selectors[selectorText] = true;\n          groups[group].rules.push(cssText);\n        }\n      }\n    });\n  }\n\n  function sheetInsert(sheet, group, text) {\n    var orderedGroups = getOrderedGroups(groups);\n    var groupIndex = orderedGroups.indexOf(group);\n    var nextGroupIndex = groupIndex + 1;\n    var nextGroup = orderedGroups[nextGroupIndex]; // Insert rule before the next group, or at the end of the stylesheet\n\n    var position = nextGroup != null && groups[nextGroup].start != null ? groups[nextGroup].start : sheet.cssRules.length;\n    var isInserted = insertRuleAt(sheet, text, position);\n\n    if (isInserted) {\n      // Set the starting index of the new group\n      if (groups[group].start == null) {\n        groups[group].start = position;\n      } // Increment the starting index of all subsequent groups\n\n\n      for (var i = nextGroupIndex; i < orderedGroups.length; i += 1) {\n        var groupNumber = orderedGroups[i];\n        var previousStart = groups[groupNumber].start;\n        groups[groupNumber].start = previousStart + 1;\n      }\n    }\n\n    return isInserted;\n  }\n\n  var OrderedCSSStyleSheet = {\n    /**\n     * The textContent of the style sheet.\n     */\n    getTextContent: function getTextContent() {\n      return getOrderedGroups(groups).map(function (group) {\n        var rules = groups[group].rules;\n        return rules.join('\\n');\n      }).join('\\n');\n    },\n\n    /**\n     * Insert a rule into the style sheet\n     */\n    insert: function insert(cssText, groupValue) {\n      var group = Number(groupValue); // Create a new group.\n\n      if (groups[group] == null) {\n        var markerRule = encodeGroupRule(group); // Create the internal record.\n\n        groups[group] = {\n          start: null,\n          rules: [markerRule]\n        }; // Update CSSOM.\n\n        if (sheet != null) {\n          sheetInsert(sheet, group, markerRule);\n        }\n      } // selectorText is more reliable than cssText for insertion checks. 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