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| 1 | +package scala.meta.internal.pc |
| 2 | + |
| 3 | +import scala.util.control.NonFatal |
| 4 | + |
| 5 | +import scala.meta.pc.PcSymbolKind |
| 6 | +import scala.meta.pc.PcSymbolProperty |
| 7 | + |
| 8 | +import dotty.tools.dotc.core.Contexts.Context |
| 9 | +import dotty.tools.dotc.core.Denotations.Denotation |
| 10 | +import dotty.tools.dotc.core.Denotations.MultiDenotation |
| 11 | +import dotty.tools.dotc.core.Flags |
| 12 | +import dotty.tools.dotc.core.Names.* |
| 13 | +import dotty.tools.dotc.core.StdNames.nme |
| 14 | +import dotty.tools.dotc.core.Symbols.* |
| 15 | +import dotty.tools.pc.utils.MtagsEnrichments.metalsDealias |
| 16 | +import dotty.tools.pc.SemanticdbSymbols |
| 17 | +import dotty.tools.pc.utils.MtagsEnrichments.allSymbols |
| 18 | + |
| 19 | +class SymbolInformationProvider(using Context): |
| 20 | + private def toSymbols( |
| 21 | + pkg: String, |
| 22 | + parts: List[(String, Boolean)], |
| 23 | + ): List[Symbol] = |
| 24 | + def loop( |
| 25 | + owners: List[Symbol], |
| 26 | + parts: List[(String, Boolean)], |
| 27 | + ): List[Symbol] = |
| 28 | + parts match |
| 29 | + case (head, isClass) :: tl => |
| 30 | + val foundSymbols = |
| 31 | + owners.flatMap { owner => |
| 32 | + val next = |
| 33 | + if isClass then owner.info.member(typeName(head)) |
| 34 | + else owner.info.member(termName(head)) |
| 35 | + next.allSymbols |
| 36 | + } |
| 37 | + if foundSymbols.nonEmpty then loop(foundSymbols, tl) |
| 38 | + else Nil |
| 39 | + case Nil => owners |
| 40 | + |
| 41 | + val pkgSym = |
| 42 | + if pkg == "_empty_" then requiredPackage(nme.EMPTY_PACKAGE) |
| 43 | + else requiredPackage(pkg) |
| 44 | + loop(List(pkgSym), parts) |
| 45 | + end toSymbols |
| 46 | + |
| 47 | + def info(symbol: String): Option[PcSymbolInformation] = |
| 48 | + val index = symbol.lastIndexOf("/") |
| 49 | + val pkg = normalizePackage(symbol.take(index + 1)) |
| 50 | + |
| 51 | + def loop( |
| 52 | + symbol: String, |
| 53 | + acc: List[(String, Boolean)], |
| 54 | + ): List[(String, Boolean)] = |
| 55 | + if symbol.isEmpty() then acc.reverse |
| 56 | + else |
| 57 | + val newSymbol = symbol.takeWhile(c => c != '.' && c != '#') |
| 58 | + val rest = symbol.drop(newSymbol.size) |
| 59 | + loop(rest.drop(1), (newSymbol, rest.headOption.exists(_ == '#')) :: acc) |
| 60 | + val names = |
| 61 | + loop(symbol.drop(index + 1).takeWhile(_ != '('), List.empty) |
| 62 | + |
| 63 | + val foundSymbols = |
| 64 | + try toSymbols(pkg, names) |
| 65 | + catch case NonFatal(e) => Nil |
| 66 | + |
| 67 | + val (searchedSymbol, alternativeSymbols) = |
| 68 | + foundSymbols.partition: compilerSymbol => |
| 69 | + SemanticdbSymbols.symbolName(compilerSymbol) == symbol |
| 70 | + |
| 71 | + searchedSymbol match |
| 72 | + case Nil => None |
| 73 | + case sym :: _ => |
| 74 | + val classSym = if sym.isClass then sym else sym.moduleClass |
| 75 | + val parents = |
| 76 | + if classSym.isClass |
| 77 | + then classSym.asClass.parentSyms.map(SemanticdbSymbols.symbolName) |
| 78 | + else Nil |
| 79 | + val dealisedSymbol = |
| 80 | + if sym.isAliasType then sym.info.metalsDealias.typeSymbol else sym |
| 81 | + val classOwner = |
| 82 | + sym.ownersIterator.drop(1).find(s => s.isClass || s.is(Flags.Module)) |
| 83 | + val overridden = sym.denot.allOverriddenSymbols.toList |
| 84 | + |
| 85 | + val pcSymbolInformation = |
| 86 | + PcSymbolInformation( |
| 87 | + symbol = SemanticdbSymbols.symbolName(sym), |
| 88 | + kind = getSymbolKind(sym), |
| 89 | + parents = parents, |
| 90 | + dealiasedSymbol = SemanticdbSymbols.symbolName(dealisedSymbol), |
| 91 | + classOwner = classOwner.map(SemanticdbSymbols.symbolName), |
| 92 | + overriddenSymbols = overridden.map(SemanticdbSymbols.symbolName), |
| 93 | + alternativeSymbols = |
| 94 | + alternativeSymbols.map(SemanticdbSymbols.symbolName), |
| 95 | + properties = |
| 96 | + if sym.is(Flags.Abstract) then List(PcSymbolProperty.ABSTRACT) |
| 97 | + else Nil, |
| 98 | + ) |
| 99 | + |
| 100 | + Some(pcSymbolInformation) |
| 101 | + end match |
| 102 | + end info |
| 103 | + |
| 104 | + private def getSymbolKind(sym: Symbol): PcSymbolKind = |
| 105 | + if sym.isAllOf(Flags.JavaInterface) then PcSymbolKind.INTERFACE |
| 106 | + else if sym.is(Flags.Trait) then PcSymbolKind.TRAIT |
| 107 | + else if sym.isConstructor then PcSymbolKind.CONSTRUCTOR |
| 108 | + else if sym.isPackageObject then PcSymbolKind.PACKAGE_OBJECT |
| 109 | + else if sym.isClass then PcSymbolKind.CLASS |
| 110 | + else if sym.is(Flags.Macro) then PcSymbolKind.MACRO |
| 111 | + else if sym.is(Flags.Local) then PcSymbolKind.LOCAL |
| 112 | + else if sym.is(Flags.Method) then PcSymbolKind.METHOD |
| 113 | + else if sym.is(Flags.Param) then PcSymbolKind.PARAMETER |
| 114 | + else if sym.is(Flags.Package) then PcSymbolKind.PACKAGE |
| 115 | + else if sym.is(Flags.TypeParam) then PcSymbolKind.TYPE_PARAMETER |
| 116 | + else if sym.isType then PcSymbolKind.TYPE |
| 117 | + else PcSymbolKind.UNKNOWN_KIND |
| 118 | + |
| 119 | + private def normalizePackage(pkg: String): String = |
| 120 | + pkg.replace("/", ".").nn.stripSuffix(".") |
| 121 | + |
| 122 | +end SymbolInformationProvider |
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