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An additional grant\n * of patent rights can be found in the PATENTS file in the same directory.\n */\n\n/* @flow */\n\n// Warning: This code is experimental and might not fully work. There is no guarantee\n// that is up-to-date with the curent react-dom/server logic and there may also be\n// security holes in the string escaping because of this.\n\nimport type { Realm } from \"../../realm.js\";\nimport type { FunctionBodyAstNode } from \"../../types.js\";\nimport { parseExpression } from \"@babel/parser\";\nimport {\n AbstractObjectValue,\n AbstractValue,\n ECMAScriptSourceFunctionValue,\n NumberValue,\n ObjectValue,\n StringValue,\n Value,\n} from \"../../values/index.js\";\nimport { getProperty } from \"../utils.js\";\nimport invariant from \"../../invariant.js\";\nimport type { ReactNode } from \"./rendering.js\";\nimport { ROOT_ATTRIBUTE_NAME } from \"./dom-config.js\";\n\nconst matchHtmlRegExp = /[\"'&<>]/;\n\nexport function createMarkupForRoot(): string {\n return ROOT_ATTRIBUTE_NAME + '=\"\"';\n}\n\nexport function isCustomComponent(\n realm: Realm,\n tagName: string,\n propsValue: ObjectValue | AbstractObjectValue\n): boolean {\n if (tagName.indexOf(\"-\") === -1) {\n let is = getProperty(realm, propsValue, \"is\");\n return is instanceof StringValue;\n }\n switch (tagName) {\n case \"annotation-xml\":\n case \"color-profile\":\n case \"font-face\":\n case \"font-face-src\":\n case \"font-face-uri\":\n case \"font-face-format\":\n case \"font-face-name\":\n case \"missing-glyph\":\n return false;\n default:\n return true;\n }\n}\n\n// $FlowFixMe: we don't want to provides types here as we inject this function into source\nexport function escapeHtml(string): string {\n if (typeof string === \"boolean\" || typeof string === \"number\") {\n return \"\" + string;\n }\n let str = \"\" + string;\n let match = matchHtmlRegExp.exec(str);\n\n if (!match) {\n return str;\n }\n\n let escape;\n let html = \"\";\n let index = 0;\n let lastIndex = 0;\n\n for (index = match.index; index < str.length; index++) {\n switch (str.charCodeAt(index)) {\n case 34:\n escape = \""\";\n break;\n case 38:\n escape = \"&\";\n break;\n case 39:\n escape = \"'\";\n break;\n case 60:\n escape = \"<\";\n break;\n case 62:\n escape = \">\";\n break;\n default:\n continue;\n }\n\n if (lastIndex !== index) {\n html += str.substring(lastIndex, index);\n }\n\n lastIndex = index + 1;\n html += escape;\n }\n\n return lastIndex !== index ? html + str.substring(lastIndex, index) : html;\n}\n\nexport function normalizeNode(realm: Realm, reactNode: ReactNode): ReactNode {\n if (Array.isArray(reactNode)) {\n let newReactNode;\n\n for (let element of reactNode) {\n if (typeof element === \"string\") {\n if (newReactNode === undefined) {\n newReactNode = element;\n } else if (typeof newReactNode === \"string\") {\n newReactNode += element;\n } else {\n let lastNode = newReactNode[newReactNode.length - 1];\n if (typeof lastNode === \"string\") {\n newReactNode[newReactNode.length - 1] += element;\n } else {\n newReactNode.push(element);\n }\n }\n } else if (newReactNode === undefined) {\n newReactNode = ([element]: Array<ReactNode>);\n } else if (typeof newReactNode === \"string\") {\n newReactNode = ([newReactNode, element]: Array<ReactNode>);\n } else {\n newReactNode.push(element);\n }\n }\n invariant(newReactNode !== undefined);\n return newReactNode;\n } else if (typeof reactNode === \"string\" || reactNode instanceof AbstractValue) {\n return reactNode;\n }\n invariant(false, \"TODO\");\n}\n\nexport function convertValueToNode(value: Value): ReactNode {\n if (value instanceof AbstractValue) {\n return value;\n } else if (value instanceof StringValue || value instanceof NumberValue) {\n return value.value + \"\";\n }\n invariant(false, \"TODO\");\n}\n\nexport function createHtmlEscapeHelper(realm: Realm): ECMAScriptSourceFunctionValue {\n let escapeHelperAst = parseExpression(escapeHtml.toString(), { plugins: [\"flow\"] });\n let helper = new ECMAScriptSourceFunctionValue(realm);\n let body = escapeHelperAst.body;\n ((body: any): FunctionBodyAstNode).uniqueOrderedTag = realm.functionBodyUniqueTagSeed++;\n helper.$ECMAScriptCode = body;\n helper.$FormalParameters = escapeHelperAst.params;\n return helper;\n}\n\nexport function createArrayHelper(realm: Realm): ECMAScriptSourceFunctionValue {\n let arrayHelper = `\n function arrayHelper(array) {\n let length = array.length;\n let i = 0;\n let str = \"\";\n let item;\n\n while (i < length) {\n item = array[i++];\n if (previousWasTextNode === true) {\n str += \"<!-- -->\" + item;\n } else {\n str += item;\n }\n previousWasTextNode = item[0] !== \"<\";\n }\n return str;\n }\n `;\n\n let escapeHelperAst = parseExpression(arrayHelper, { plugins: [\"flow\"] });\n let helper = new ECMAScriptSourceFunctionValue(realm);\n let body = escapeHelperAst.body;\n ((body: any): FunctionBodyAstNode).uniqueOrderedTag = realm.functionBodyUniqueTagSeed++;\n helper.$ECMAScriptCode = body;\n helper.$FormalParameters = escapeHelperAst.params;\n return helper;\n}\n\nexport function getNonChildrenInnerMarkup(\n realm: Realm,\n propsValue: ObjectValue | AbstractObjectValue\n): ReactNode | null {\n let innerHTML = getProperty(realm, propsValue, \"dangerouslySetInnerHTML\");\n\n if (innerHTML instanceof ObjectValue) {\n let _html = getProperty(realm, innerHTML, \"dangerouslySetInnerHTML\");\n\n if (_html instanceof StringValue) {\n return _html.value;\n }\n } else {\n let content = getProperty(realm, propsValue, \"children\");\n\n if (content instanceof StringValue || content instanceof NumberValue) {\n return escapeHtml(content.value);\n }\n }\n return null;\n}\n\nexport function quoteAttributeValueForBrowser(value: string): string {\n return '\"' + escapeHtml(value) + '\"';\n}\n"],"file":"utils.js"} |