@grafana/ui/dist/esm/slate-plugins/slate-prism/index.mjs.map

Grafana Components Library

{"version":3,"file":"index.mjs","sources":["../../../../src/slate-plugins/slate-prism/index.ts"],"sourcesContent":["import Prism, { LanguageMap } from 'prismjs';\nimport { Block, Text, Decoration } from 'slate';\nimport { Plugin } from 'slate-react';\n\nimport TOKEN_MARK from './TOKEN_MARK';\nimport Options, { OptionsFormat } from './options';\n\nexport interface Token {\n  content: string;\n  offsets?: {\n    start: number;\n    end: number;\n  };\n  types: string[];\n  aliases: string[];\n  prev?: Token | null;\n  next?: Token | null;\n}\n\n/**\n * A Slate plugin to highlight code syntax.\n */\nexport function SlatePrism(optsParam: OptionsFormat = {}, prismLanguages = Prism.languages as LanguageMap): Plugin {\n  const opts: Options = new Options(optsParam);\n\n  return {\n    decorateNode: (node, editor, next) => {\n      if (!opts.onlyIn(node)) {\n        return next();\n      }\n\n      const block = Block.create(node as Block);\n      const grammarName = opts.getSyntax(block);\n      const grammar = prismLanguages[grammarName];\n\n      if (!grammar) {\n        // Grammar not loaded\n        return [];\n      }\n\n      // Tokenize the whole block text\n      const texts = block.getTexts();\n      const blockText = texts.map((text) => text && text.getText()).join('\\n');\n      const tokens = Prism.tokenize(blockText, grammar);\n      const flattened = flattenTokens(tokens);\n\n      const newData = editor.value.data.set('tokens', flattened);\n      editor.setData(newData);\n      return decorateNode(opts, tokens, block);\n    },\n\n    renderDecoration: (props, editor, next) =>\n      opts.renderDecoration(\n        {\n          children: props.children,\n          decoration: props.decoration,\n        },\n        editor,\n        next\n      ),\n  };\n}\n\n/**\n * Returns the decoration for a node\n */\nfunction decorateNode(opts: Options, tokens: Array<string | Prism.Token>, block: Block) {\n  const texts = block.getTexts();\n\n  // The list of decorations to return\n  const decorations: Decoration[] = [];\n  let textStart = 0;\n  let textEnd = 0;\n\n  texts.forEach((text) => {\n    textEnd = textStart + text!.getText().length;\n\n    let offset = 0;\n    function processToken(token: string | Prism.Token, accu?: string | number) {\n      if (typeof token === 'string') {\n        if (accu) {\n          const decoration = createDecoration({\n            text: text!,\n            textStart,\n            textEnd,\n            start: offset,\n            end: offset + token.length,\n            className: `prism-token token ${accu}`,\n            block,\n          });\n\n          if (decoration) {\n            decorations.push(decoration);\n          }\n        }\n        offset += token.length;\n      } else {\n        accu = `${accu} ${token.type}`;\n        if (token.alias) {\n          accu += ' ' + token.alias;\n        }\n\n        if (typeof token.content === 'string') {\n          const decoration = createDecoration({\n            text: text!,\n            textStart,\n            textEnd,\n            start: offset,\n            end: offset + token.content.length,\n            className: `prism-token token ${accu}`,\n            block,\n          });\n\n          if (decoration) {\n            decorations.push(decoration);\n          }\n\n          offset += token.content.length;\n        } else {\n          // When using token.content instead of token.matchedStr, token can be deep\n          for (let i = 0; i < token.content.length; i += 1) {\n            // @ts-ignore\n            processToken(token.content[i], accu);\n          }\n        }\n      }\n    }\n\n    tokens.forEach(processToken);\n    textStart = textEnd + 1; // account for added `\\n`\n  });\n\n  return decorations;\n}\n\n/**\n * Return a decoration range for the given text.\n */\nfunction createDecoration({\n  text,\n  textStart,\n  textEnd,\n  start,\n  end,\n  className,\n  block,\n}: {\n  text: Text; // The text being decorated\n  textStart: number; // Its start position in the whole text\n  textEnd: number; // Its end position in the whole text\n  start: number; // The position in the whole text where the token starts\n  end: number; // The position in the whole text where the token ends\n  className: string; // The prism token classname\n  block: Block;\n}): Decoration | null {\n  if (start >= textEnd || end <= textStart) {\n    // Ignore, the token is not in the text\n    return null;\n  }\n\n  // Shrink to this text boundaries\n  start = Math.max(start, textStart);\n  end = Math.min(end, textEnd);\n\n  // Now shift offsets to be relative to this text\n  start -= textStart;\n  end -= textStart;\n\n  const myDec = block.createDecoration({\n    object: 'decoration',\n    anchor: {\n      key: text.key,\n      offset: start,\n      object: 'point',\n    },\n    focus: {\n      key: text.key,\n      offset: end,\n      object: 'point',\n    },\n    type: TOKEN_MARK,\n    data: { className },\n  });\n\n  return myDec;\n}\n\nfunction flattenToken(token: string | Prism.Token | Array<string | Prism.Token>): Token[] {\n  if (typeof token === 'string') {\n    return [\n      {\n        content: token,\n        types: [],\n        aliases: [],\n      },\n    ];\n  } else if (Array.isArray(token)) {\n    return token.flatMap((t) => flattenToken(t));\n  } else if (token instanceof Prism.Token) {\n    return flattenToken(token.content).flatMap((t) => {\n      let aliases: string[] = [];\n      if (typeof token.alias === 'string') {\n        aliases = [token.alias];\n      } else {\n        aliases = token.alias ?? [];\n      }\n\n      return {\n        content: t.content,\n        types: [token.type, ...t.types],\n        aliases: [...aliases, ...t.aliases],\n      };\n    });\n  }\n\n  return [];\n}\n\nexport function flattenTokens(token: string | Prism.Token | Array<string | Prism.Token>) {\n  const tokens = flattenToken(token);\n\n  if (!tokens.length) {\n    return [];\n  }\n\n  const firstToken = tokens[0];\n  firstToken.prev = null;\n  firstToken.next = tokens.length >= 2 ? tokens[1] : null;\n  firstToken.offsets = {\n    start: 0,\n    end: firstToken.content.length,\n  };\n\n  for (let i = 1; i < tokens.length - 1; i++) {\n    tokens[i].prev = tokens[i - 1];\n    tokens[i].next = tokens[i + 1];\n\n    tokens[i].offsets = {\n      start: tokens[i - 1].offsets!.end,\n      end: tokens[i - 1].offsets!.end + tokens[i].content.length,\n    };\n  }\n\n  const lastToken = tokens[tokens.length - 1];\n  lastToken.prev = tokens.length >= 2 ? tokens[tokens.length - 2] : null;\n  lastToken.next = 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