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

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = exports.TransformScope = void 0;

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;
  }
}

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;
  }

}

exports.TransformScope = TransformScope;

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;
  }

}

exports.default = RootTransformScope;

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,SAAA,YAAA,CAAA,IAAA,EAAsC;AACpC,UAAQ,IAAI,CAAZ,IAAA;AACE,SAAA,aAAA;AACE;AACA;AACA,aAAO,IAAI,CAAJ,GAAA,CAAA,KAAA,CAAA,GAAA,EAAP,CAAO,CAAP;;AAEF,SAAA,eAAA;AACA,SAAA,mBAAA;AACA,SAAA,gBAAA;AACE,aAAO,YAAY,CAAC,IAAI,CAAxB,IAAmB,CAAnB;;AAEF,SAAA,kBAAA;AACA,SAAA,aAAA;AACA,SAAA,gBAAA;AACA,SAAA,eAAA;AACA,SAAA,eAAA;AACA,SAAA,UAAA;AACA,SAAA,UAAA;AACA,SAAA,OAAA;AACA,SAAA,kBAAA;AACA,SAAA,0BAAA;AACA,SAAA,kBAAA;AACA,SAAA,0BAAA;AACA,SAAA,UAAA;AACA,SAAA,iBAAA;AACA,SAAA,SAAA;AACA,SAAA,MAAA;AACA,SAAA,UAAA;AACE,aAAA,SAAA;;AACF,SAAA,gBAAA;AACA;AACE,aAAO,IAAI,CAAJ,KAAA,CAAA,MAAA,GAAoB,IAAI,CAAJ,KAAA,CAApB,CAAoB,CAApB,GAAP,SAAA;AA/BJ;AAiCD;;AAED,SAAA,SAAA,CAAA,IAAA,EAAmC;AACjC,UAAQ,IAAI,CAAZ,IAAA;AACE,SAAA,aAAA;AACA,SAAA,SAAA;AACA,SAAA,OAAA;AACA,SAAA,UAAA;AACE,aAAO,IAAI,CAAX,WAAA;;AAEF,SAAA,gBAAA;AACE,aAAO,IAAI,CAAJ,OAAA,CAAP,WAAA;;AAEF;AACE,aAAA,SAAA;AAXJ;AAaD;;AAEK,MAAA,cAAA,CAA8B;AAIlC,EAAA,WAAA,CAAA,MAAA,EAAsC;AAAhB,SAAA,MAAA,GAAA,MAAA;AAHtB,SAAA,UAAA,GAAA,KAAA;AACA,SAAA,UAAA,GAAA,EAAA;;AAGE,SAAK,MAAL,KAAA,IAAA,MAAA,EAA4B;AAC1B,WAAA,UAAA,CAAA,KAAA,IAAA,KAAA;AACD;AACF;;AAED,EAAA,KAAK,CAAA,IAAA,EAAiB;AACpB,QAAI,MAAM,GAAG,SAAS,CAAtB,IAAsB,CAAtB;AAEA,WAAO,MAAM,GAAG,IAAA,mBAAA,CAAA,MAAA,EAAH,IAAG,CAAH,GAAb,IAAA;AACD;;AAED,EAAA,UAAU,GAAA;AACR,SAAA,UAAA,GAAA,IAAA;AACD;;AAlBiC;;;;AAyBtB,MAAA,kBAAA,SAAA,cAAA,CAAgD;AAC5D,EAAA,WAAA,CAAA,IAAA,EAA4B;;;AAC1B,QAAI,MAAM,GAAA,CAAA,EAAA,GAAG,SAAS,CAAZ,IAAY,CAAZ,MAAA,IAAA,IAAkB,EAAA,KAAA,KAAlB,CAAA,GAAA,EAAA,GAAV,EAAA;AAEA,UAAA,MAAA;AACD;;AAED,EAAA,QAAQ,CAAA,IAAA,EAAiB;AACvB,QAAI,IAAI,GAAG,YAAY,CAAvB,IAAuB,CAAvB;;AAEA,QAAI,IAAI,IAAI,IAAI,IAAI,KAApB,UAAA,EAAqC;AACnC,WAAA,UAAA,CAAA,IAAA,IAAA,IAAA;AACD;AACF;;AAED,EAAA,OAAO,CAAA,IAAA,EAAa;AAClB,WAAO,KAAA,MAAA,CAAA,OAAA,CAAA,IAAA,MAA8B,CAArC,CAAA;AACD;;AAED,EAAA,mBAAmB,GAAA;AACjB,QAAI,CAAC,KAAD,UAAA,IAAoB,KAAA,MAAA,CAAA,MAAA,GAAxB,CAAA,EAAgD;AAC9C,aAAO,KAAA,MAAA,CAAA,MAAA,CAAoB,KAAD,IAAW,CAAC,KAAA,UAAA,CAAtC,KAAsC,CAA/B,CAAP;AACD;;AAED,WAAA,KAAA;AACD;;AAzB2D;;;;AA4B9D,MAAA,mBAAA,SAAA,cAAA,CAAgD;AAC9C,EAAA,WAAA,CAAA,MAAA,EAAA,MAAA,EAA4D;AAC1D,UAAA,MAAA;AADoC,SAAA,MAAA,GAAA,MAAA;AAErC;;AAED,EAAA,QAAQ,CAAA,IAAA,EAAiB;AACvB,QAAI,IAAI,GAAG,YAAY,CAAvB,IAAuB,CAAvB;;AAEA,QAAI,IAAI,IAAI,IAAI,IAAI,KAApB,UAAA,EAAqC;AACnC,WAAA,UAAA,CAAA,IAAA,IAAA,IAAA;AADF,KAAA,MAEO;AACL,WAAA,MAAA,CAAA,QAAA,CAAA,IAAA;AACD;AACF;;AAED,EAAA,OAAO,CAAA,IAAA,EAAa;AAClB,WAAO,KAAA,MAAA,CAAA,OAAA,CAAA,IAAA,MAA8B,CAA9B,CAAA,IAAoC,KAAA,MAAA,CAAA,OAAA,CAA3C,IAA2C,CAA3C;AACD;;AAED,EAAA,mBAAmB,GAAA;AACjB,QAAI,CAAC,KAAD,UAAA,IAAoB,KAAA,MAAA,CAAA,MAAA,GAAxB,CAAA,EAAgD;AAC9C;AACA;AACA,UAAI,CAAC,KAAA,UAAA,CAAgB,KAAA,MAAA,CAAY,KAAA,MAAA,CAAA,MAAA,GAAjC,CAAqB,CAAhB,CAAL,EAA2D;AACzD,eAAO,CAAC,KAAA,MAAA,CAAY,KAAA,MAAA,CAAA,MAAA,GAApB,CAAQ,CAAD,CAAP;AACD;AACF;;AAED,WAAA,KAAA;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":""}