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//===--- CodeCompletionStringPrinter.cpp ----------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2022 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "swift/IDE/CodeCompletionStringPrinter.h"
#include "CodeCompletionResultBuilder.h"
#include "swift/AST/Module.h"
using namespace swift;
using namespace swift::ide;
using ChunkKind = CodeCompletionString::Chunk::ChunkKind;
std::optional<ChunkKind>
CodeCompletionStringPrinter::getChunkKindForPrintNameContext(
PrintNameContext context) const {
switch (context) {
case PrintNameContext::Keyword:
if (isCurrentStructureKind(PrintStructureKind::EffectsSpecifiers)) {
return ChunkKind::EffectsSpecifierKeyword;
}
return ChunkKind::Keyword;
case PrintNameContext::IntroducerKeyword:
return ChunkKind::DeclIntroducer;
case PrintNameContext::Attribute:
return ChunkKind::Attribute;
case PrintNameContext::FunctionParameterExternal:
if (isInType()) {
return std::nullopt;
}
return ChunkKind::ParameterDeclExternalName;
case PrintNameContext::FunctionParameterLocal:
if (isInType()) {
return std::nullopt;
}
return ChunkKind::ParameterDeclLocalName;
default:
return std::nullopt;
}
}
std::optional<ChunkKind>
CodeCompletionStringPrinter::getChunkKindForStructureKind(
PrintStructureKind Kind) const {
switch (Kind) {
case PrintStructureKind::FunctionParameter:
if (isInType()) {
return std::nullopt;
}
return ChunkKind::ParameterDeclBegin;
case PrintStructureKind::DefaultArgumentClause:
return ChunkKind::DefaultArgumentClauseBegin;
case PrintStructureKind::DeclGenericParameterClause:
return ChunkKind::GenericParameterClauseBegin;
case PrintStructureKind::DeclGenericRequirementClause:
return ChunkKind::GenericRequirementClauseBegin;
case PrintStructureKind::EffectsSpecifiers:
return ChunkKind::EffectsSpecifierClauseBegin;
case PrintStructureKind::DeclResultTypeClause:
return ChunkKind::DeclResultTypeClauseBegin;
case PrintStructureKind::FunctionParameterType:
return ChunkKind::ParameterDeclTypeBegin;
default:
return std::nullopt;
}
}
void CodeCompletionStringPrinter::startNestedGroup(ChunkKind Kind) {
flush();
Builder.CurrentNestingLevel++;
Builder.addSimpleChunk(Kind);
}
void CodeCompletionStringPrinter::endNestedGroup() {
flush();
Builder.CurrentNestingLevel--;
}
void CodeCompletionStringPrinter::flush() {
if (Buffer.empty())
return;
Builder.addChunkWithText(CurrChunkKind, Buffer);
Buffer.clear();
}
/// Start \c AttributeAndModifierListBegin group. This must be called before
/// any attributes/modifiers printed to the output when printing an override
/// compleion.
void CodeCompletionStringPrinter::startPreamble() {
assert(!InPreamble);
startNestedGroup(ChunkKind::AttributeAndModifierListBegin);
InPreamble = true;
}
void CodeCompletionStringPrinter::endPremable() {
if (!InPreamble)
return;
InPreamble = false;
endNestedGroup();
}
void CodeCompletionStringPrinter::printText(StringRef Text) {
// Detect ': ' and ', ' in parameter clauses.
// FIXME: Is there a better way?
if (isCurrentStructureKind(PrintStructureKind::FunctionParameter) &&
Text == ": ") {
setNextChunkKind(ChunkKind::ParameterDeclColon);
} else if (isCurrentStructureKind(
PrintStructureKind::FunctionParameterList) &&
Text == ", ") {
setNextChunkKind(ChunkKind::Comma);
}
if (CurrChunkKind != NextChunkKind) {
// If the next desired kind is different from the current buffer, flush
// the current buffer.
flush();
CurrChunkKind = NextChunkKind;
}
Buffer.append(Text);
}
void CodeCompletionStringPrinter::printTypeRef(Type T, const TypeDecl *TD,
Identifier Name,
PrintNameContext NameContext) {
NextChunkKind = TD->getModuleContext()->isNonUserModule()
? ChunkKind::TypeIdSystem
: ChunkKind::TypeIdUser;
ASTPrinter::printTypeRef(T, TD, Name, NameContext);
NextChunkKind = ChunkKind::Text;
}
void CodeCompletionStringPrinter::printDeclLoc(const Decl *D) {
endPremable();
setNextChunkKind(ChunkKind::BaseName);
}
void CodeCompletionStringPrinter::printDeclNameEndLoc(const Decl *D) {
setNextChunkKind(ChunkKind::Text);
}
void CodeCompletionStringPrinter::printNamePre(PrintNameContext context) {
if (context == PrintNameContext::IntroducerKeyword)
endPremable();
if (auto Kind = getChunkKindForPrintNameContext(context))
setNextChunkKind(*Kind);
}
void CodeCompletionStringPrinter::printNamePost(PrintNameContext context) {
if (getChunkKindForPrintNameContext(context))
setNextChunkKind(ChunkKind::Text);
}
void CodeCompletionStringPrinter::printTypePre(const TypeLoc &TL) {
++TypeDepth;
}
void CodeCompletionStringPrinter::printTypePost(const TypeLoc &TL) {
assert(TypeDepth > 0);
--TypeDepth;
}
void CodeCompletionStringPrinter::printStructurePre(PrintStructureKind Kind,
const Decl *D) {
StructureStack.push_back(Kind);
if (auto chunkKind = getChunkKindForStructureKind(Kind))
startNestedGroup(*chunkKind);
}
void CodeCompletionStringPrinter::printStructurePost(PrintStructureKind Kind,
const Decl *D) {
if (getChunkKindForStructureKind(Kind))
endNestedGroup();
assert(Kind == StructureStack.back());
StructureStack.pop_back();
}
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