converse-built/node_modules/@glimmer/syntax/dist/modules/es2017/lib/traversal/scope.js

function getLocalName(node) {
  switch (node.type) {
    case 'ElementNode':
      // unfortunately the ElementNode stores `tag` as a string
      // if that changes in glimmer-vm this will need to be updated
      return node.tag.split('.')[0];

    case 'SubExpression':
    case 'MustacheStatement':
    case 'BlockStatement':
      return getLocalName(node.path);

    case 'UndefinedLiteral':
    case 'NullLiteral':
    case 'BooleanLiteral':
    case 'StringLiteral':
    case 'NumberLiteral':
    case 'TextNode':
    case 'Template':
    case 'Block':
    case 'CommentStatement':
    case 'MustacheCommentStatement':
    case 'PartialStatement':
    case 'ElementModifierStatement':
    case 'AttrNode':
    case 'ConcatStatement':
    case 'Program':
    case 'Hash':
    case 'HashPair':
      return undefined;

    case 'PathExpression':
    default:
      return node.parts.length ? node.parts[0] : undefined;
  }
}

function getLocals(node) {
  switch (node.type) {
    case 'ElementNode':
    case 'Program':
    case 'Block':
    case 'Template':
      return node.blockParams;

    case 'BlockStatement':
      return node.program.blockParams;

    default:
      return undefined;
  }
}

export class TransformScope {
  constructor(locals) {
    this.locals = locals;
    this.hasPartial = false;
    this.usedLocals = {};

    for (const local of locals) {
      this.usedLocals[local] = false;
    }
  }

  child(node) {
    let locals = getLocals(node);
    return locals ? new ChildTransformScope(locals, this) : this;
  }

  usePartial() {
    this.hasPartial = true;
  }

}
export default class RootTransformScope extends TransformScope {
  constructor(node) {
    var _a;

    let locals = (_a = getLocals(node)) !== null && _a !== void 0 ? _a : [];
    super(locals);
  }

  useLocal(node) {
    let name = getLocalName(node);

    if (name && name in this.usedLocals) {
      this.usedLocals[name] = true;
    }
  }

  isLocal(name) {
    return this.locals.indexOf(name) !== -1;
  }

  currentUnusedLocals() {
    if (!this.hasPartial && this.locals.length > 0) {
      return this.locals.filter(local => !this.usedLocals[local]);
    }

    return false;
  }

}

class ChildTransformScope extends TransformScope {
  constructor(locals, parent) {
    super(locals);
    this.parent = parent;
  }

  useLocal(node) {
    let name = getLocalName(node);

    if (name && name in this.usedLocals) {
      this.usedLocals[name] = true;
    } else {
      this.parent.useLocal(node);
    }
  }

  isLocal(name) {
    return this.locals.indexOf(name) !== -1 || this.parent.isLocal(name);
  }

  currentUnusedLocals() {
    if (!this.hasPartial && this.locals.length > 0) {
      // We only care about the last local, because if it is used then it implies
      // usage of the others (specifically when in a child block, |foo bar|)
      if (!this.usedLocals[this.locals[this.locals.length - 1]]) {
        return [this.locals[this.locals.length - 1]];
      }
    }

    return false;
  }

}
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"sources":["../../../../../packages/@glimmer/syntax/lib/traversal/scope.ts"],"names":[],"mappings":"AAEA,SAAS,YAAT,CAAsB,IAAtB,EAAsC;AACpC,UAAQ,IAAI,CAAC,IAAb;AACE,SAAK,aAAL;AACE;AACA;AACA,aAAO,IAAI,CAAC,GAAL,CAAS,KAAT,CAAe,GAAf,EAAoB,CAApB,CAAP;;AAEF,SAAK,eAAL;AACA,SAAK,mBAAL;AACA,SAAK,gBAAL;AACE,aAAO,YAAY,CAAC,IAAI,CAAC,IAAN,CAAnB;;AAEF,SAAK,kBAAL;AACA,SAAK,aAAL;AACA,SAAK,gBAAL;AACA,SAAK,eAAL;AACA,SAAK,eAAL;AACA,SAAK,UAAL;AACA,SAAK,UAAL;AACA,SAAK,OAAL;AACA,SAAK,kBAAL;AACA,SAAK,0BAAL;AACA,SAAK,kBAAL;AACA,SAAK,0BAAL;AACA,SAAK,UAAL;AACA,SAAK,iBAAL;AACA,SAAK,SAAL;AACA,SAAK,MAAL;AACA,SAAK,UAAL;AACE,aAAO,SAAP;;AACF,SAAK,gBAAL;AACA;AACE,aAAO,IAAI,CAAC,KAAL,CAAW,MAAX,GAAoB,IAAI,CAAC,KAAL,CAAW,CAAX,CAApB,GAAoC,SAA3C;AA/BJ;AAiCD;;AAED,SAAS,SAAT,CAAmB,IAAnB,EAAmC;AACjC,UAAQ,IAAI,CAAC,IAAb;AACE,SAAK,aAAL;AACA,SAAK,SAAL;AACA,SAAK,OAAL;AACA,SAAK,UAAL;AACE,aAAO,IAAI,CAAC,WAAZ;;AAEF,SAAK,gBAAL;AACE,aAAO,IAAI,CAAC,OAAL,CAAa,WAApB;;AAEF;AACE,aAAO,SAAP;AAXJ;AAaD;;AAED,OAAM,MAAgB,cAAhB,CAA8B;AAIlC,EAAA,WAAA,CAAsB,MAAtB,EAAsC;AAAhB,SAAA,MAAA,GAAA,MAAA;AAHtB,SAAA,UAAA,GAAa,KAAb;AACA,SAAA,UAAA,GAAyC,EAAzC;;AAGE,SAAK,MAAM,KAAX,IAAoB,MAApB,EAA4B;AAC1B,WAAK,UAAL,CAAgB,KAAhB,IAAyB,KAAzB;AACD;AACF;;AAED,EAAA,KAAK,CAAC,IAAD,EAAiB;AACpB,QAAI,MAAM,GAAG,SAAS,CAAC,IAAD,CAAtB;AAEA,WAAO,MAAM,GAAG,IAAI,mBAAJ,CAAwB,MAAxB,EAAgC,IAAhC,CAAH,GAA2C,IAAxD;AACD;;AAED,EAAA,UAAU,GAAA;AACR,SAAK,UAAL,GAAkB,IAAlB;AACD;;AAlBiC;AAyBpC,eAAc,MAAO,kBAAP,SAAkC,cAAlC,CAAgD;AAC5D,EAAA,WAAA,CAAY,IAAZ,EAA4B;;;AAC1B,QAAI,MAAM,GAAA,CAAA,EAAA,GAAG,SAAS,CAAC,IAAD,CAAZ,MAAkB,IAAlB,IAAkB,EAAA,KAAA,KAAA,CAAlB,GAAkB,EAAlB,GAAsB,EAAhC;AAEA,UAAM,MAAN;AACD;;AAED,EAAA,QAAQ,CAAC,IAAD,EAAiB;AACvB,QAAI,IAAI,GAAG,YAAY,CAAC,IAAD,CAAvB;;AAEA,QAAI,IAAI,IAAI,IAAI,IAAI,KAAK,UAAzB,EAAqC;AACnC,WAAK,UAAL,CAAgB,IAAhB,IAAwB,IAAxB;AACD;AACF;;AAED,EAAA,OAAO,CAAC,IAAD,EAAa;AAClB,WAAO,KAAK,MAAL,CAAY,OAAZ,CAAoB,IAApB,MAA8B,CAAC,CAAtC;AACD;;AAED,EAAA,mBAAmB,GAAA;AACjB,QAAI,CAAC,KAAK,UAAN,IAAoB,KAAK,MAAL,CAAY,MAAZ,GAAqB,CAA7C,EAAgD;AAC9C,aAAO,KAAK,MAAL,CAAY,MAAZ,CAAoB,KAAD,IAAW,CAAC,KAAK,UAAL,CAAgB,KAAhB,CAA/B,CAAP;AACD;;AAED,WAAO,KAAP;AACD;;AAzB2D;;AA4B9D,MAAM,mBAAN,SAAkC,cAAlC,CAAgD;AAC9C,EAAA,WAAA,CAAY,MAAZ,EAAsC,MAAtC,EAA4D;AAC1D,UAAM,MAAN;AADoC,SAAA,MAAA,GAAA,MAAA;AAErC;;AAED,EAAA,QAAQ,CAAC,IAAD,EAAiB;AACvB,QAAI,IAAI,GAAG,YAAY,CAAC,IAAD,CAAvB;;AAEA,QAAI,IAAI,IAAI,IAAI,IAAI,KAAK,UAAzB,EAAqC;AACnC,WAAK,UAAL,CAAgB,IAAhB,IAAwB,IAAxB;AACD,KAFD,MAEO;AACL,WAAK,MAAL,CAAY,QAAZ,CAAqB,IAArB;AACD;AACF;;AAED,EAAA,OAAO,CAAC,IAAD,EAAa;AAClB,WAAO,KAAK,MAAL,CAAY,OAAZ,CAAoB,IAApB,MAA8B,CAAC,CAA/B,IAAoC,KAAK,MAAL,CAAY,OAAZ,CAAoB,IAApB,CAA3C;AACD;;AAED,EAAA,mBAAmB,GAAA;AACjB,QAAI,CAAC,KAAK,UAAN,IAAoB,KAAK,MAAL,CAAY,MAAZ,GAAqB,CAA7C,EAAgD;AAC9C;AACA;AACA,UAAI,CAAC,KAAK,UAAL,CAAgB,KAAK,MAAL,CAAY,KAAK,MAAL,CAAY,MAAZ,GAAqB,CAAjC,CAAhB,CAAL,EAA2D;AACzD,eAAO,CAAC,KAAK,MAAL,CAAY,KAAK,MAAL,CAAY,MAAZ,GAAqB,CAAjC,CAAD,CAAP;AACD;AACF;;AAED,WAAO,KAAP;AACD;;AA7B6C","sourcesContent":["import * as ASTv1 from '../v1/api';\n\nfunction getLocalName(node: ASTv1.Node): string | undefined {\n  switch (node.type) {\n    case 'ElementNode':\n      // unfortunately the ElementNode stores `tag` as a string\n      // if that changes in glimmer-vm this will need to be updated\n      return node.tag.split('.')[0];\n\n    case 'SubExpression':\n    case 'MustacheStatement':\n    case 'BlockStatement':\n      return getLocalName(node.path);\n\n    case 'UndefinedLiteral':\n    case 'NullLiteral':\n    case 'BooleanLiteral':\n    case 'StringLiteral':\n    case 'NumberLiteral':\n    case 'TextNode':\n    case 'Template':\n    case 'Block':\n    case 'CommentStatement':\n    case 'MustacheCommentStatement':\n    case 'PartialStatement':\n    case 'ElementModifierStatement':\n    case 'AttrNode':\n    case 'ConcatStatement':\n    case 'Program':\n    case 'Hash':\n    case 'HashPair':\n      return undefined;\n    case 'PathExpression':\n    default:\n      return node.parts.length ? node.parts[0] : undefined;\n  }\n}\n\nfunction getLocals(node: ASTv1.Node): string[] | undefined {\n  switch (node.type) {\n    case 'ElementNode':\n    case 'Program':\n    case 'Block':\n    case 'Template':\n      return node.blockParams;\n\n    case 'BlockStatement':\n      return node.program.blockParams;\n\n    default:\n      return undefined;\n  }\n}\n\nexport abstract class TransformScope {\n  hasPartial = false;\n  usedLocals: { [key: string]: boolean } = {};\n\n  constructor(protected locals: string[]) {\n    for (const local of locals) {\n      this.usedLocals[local] = false;\n    }\n  }\n\n  child(node: ASTv1.Node): TransformScope {\n    let locals = getLocals(node);\n\n    return locals ? new ChildTransformScope(locals, this) : this;\n  }\n\n  usePartial(): void {\n    this.hasPartial = true;\n  }\n\n  abstract isLocal(name: string): boolean;\n  abstract useLocal(node: ASTv1.Node): void;\n  abstract currentUnusedLocals(): string[] | false;\n}\n\nexport default class RootTransformScope extends TransformScope {\n  constructor(node: ASTv1.Node) {\n    let locals = getLocals(node) ?? [];\n\n    super(locals);\n  }\n\n  useLocal(node: ASTv1.Node): void {\n    let name = getLocalName(node);\n\n    if (name && name in this.usedLocals) {\n      this.usedLocals[name] = true;\n    }\n  }\n\n  isLocal(name: string): boolean {\n    return this.locals.indexOf(name) !== -1;\n  }\n\n  currentUnusedLocals(): string[] | false {\n    if (!this.hasPartial && this.locals.length > 0) {\n      return this.locals.filter((local) => !this.usedLocals[local]);\n    }\n\n    return false;\n  }\n}\n\nclass ChildTransformScope extends TransformScope {\n  constructor(locals: string[], private parent: TransformScope) {\n    super(locals);\n  }\n\n  useLocal(node: ASTv1.Node): void {\n    let name = getLocalName(node);\n\n    if (name && name in this.usedLocals) {\n      this.usedLocals[name] = true;\n    } else {\n      this.parent.useLocal(node);\n    }\n  }\n\n  isLocal(name: string): boolean {\n    return this.locals.indexOf(name) !== -1 || this.parent.isLocal(name);\n  }\n\n  currentUnusedLocals(): string[] | false {\n    if (!this.hasPartial && this.locals.length > 0) {\n      // We only care about the last local, because if it is used then it implies\n      // usage of the others (specifically when in a child block, |foo bar|)\n      if (!this.usedLocals[this.locals[this.locals.length - 1]]) {\n        return [this.locals[this.locals.length - 1]];\n      }\n    }\n\n    return false;\n  }\n}\n"],"sourceRoot":""}