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node_modules/@ant-design/cssinjs/es/StyleContext.js

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+import _objectSpread from "@babel/runtime/helpers/esm/objectSpread2";
+import _objectWithoutProperties from "@babel/runtime/helpers/esm/objectWithoutProperties";
+var _excluded = ["children"];
+import useMemo from "rc-util/es/hooks/useMemo";
+import isEqual from "rc-util/es/isEqual";
+import * as React from 'react';
+import CacheEntity from "./Cache";
+export var ATTR_TOKEN = 'data-token-hash';
+export var ATTR_MARK = 'data-css-hash';
+export var ATTR_CACHE_PATH = 'data-cache-path';
+
+// Mark css-in-js instance in style element
+export var CSS_IN_JS_INSTANCE = '__cssinjs_instance__';
+export function createCache() {
+  var cssinjsInstanceId = Math.random().toString(12).slice(2);
+
+  // Tricky SSR: Move all inline style to the head.
+  // PS: We do not recommend tricky mode.
+  if (typeof document !== 'undefined' && document.head && document.body) {
+    var styles = document.body.querySelectorAll("style[".concat(ATTR_MARK, "]")) || [];
+    var firstChild = document.head.firstChild;
+    Array.from(styles).forEach(function (style) {
+      style[CSS_IN_JS_INSTANCE] = style[CSS_IN_JS_INSTANCE] || cssinjsInstanceId;
+
+      // Not force move if no head
+      if (style[CSS_IN_JS_INSTANCE] === cssinjsInstanceId) {
+        document.head.insertBefore(style, firstChild);
+      }
+    });
+
+    // Deduplicate of moved styles
+    var styleHash = {};
+    Array.from(document.querySelectorAll("style[".concat(ATTR_MARK, "]"))).forEach(function (style) {
+      var hash = style.getAttribute(ATTR_MARK);
+      if (styleHash[hash]) {
+        if (style[CSS_IN_JS_INSTANCE] === cssinjsInstanceId) {
+          var _style$parentNode;
+          (_style$parentNode = style.parentNode) === null || _style$parentNode === void 0 || _style$parentNode.removeChild(style);
+        }
+      } else {
+        styleHash[hash] = true;
+      }
+    });
+  }
+  return new CacheEntity(cssinjsInstanceId);
+}
+var StyleContext = /*#__PURE__*/React.createContext({
+  hashPriority: 'low',
+  cache: createCache(),
+  defaultCache: true
+});
+export var StyleProvider = function StyleProvider(props) {
+  var children = props.children,
+    restProps = _objectWithoutProperties(props, _excluded);
+  var parentContext = React.useContext(StyleContext);
+  var context = useMemo(function () {
+    var mergedContext = _objectSpread({}, parentContext);
+    Object.keys(restProps).forEach(function (key) {
+      var value = restProps[key];
+      if (restProps[key] !== undefined) {
+        mergedContext[key] = value;
+      }
+    });
+    var cache = restProps.cache;
+    mergedContext.cache = mergedContext.cache || createCache();
+    mergedContext.defaultCache = !cache && parentContext.defaultCache;
+    return mergedContext;
+  }, [parentContext, restProps], function (prev, next) {
+    return !isEqual(prev[0], next[0], true) || !isEqual(prev[1], next[1], true);
+  });
+  return /*#__PURE__*/React.createElement(StyleContext.Provider, {
+    value: context
+  }, children);
+};
+export default StyleContext;