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//===--- EditorAdapter.cpp ------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 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/Basic/SourceLoc.h"
#include "swift/Basic/SourceManager.h"
#include "swift/Migrator/EditorAdapter.h"
#include "swift/Migrator/Replacement.h"
#include "swift/Parse/Lexer.h"
#include "clang/Basic/SourceManager.h"
using namespace swift;
using namespace swift::migrator;
std::pair<unsigned, unsigned>
EditorAdapter::getLocInfo(swift::SourceLoc Loc) const {
auto SwiftBufferID = SwiftSrcMgr.findBufferContainingLoc(Loc);
auto Offset = SwiftSrcMgr.getLocOffsetInBuffer(Loc, SwiftBufferID);
return { SwiftBufferID, Offset };
}
bool
EditorAdapter::cacheReplacement(CharSourceRange Range, StringRef Text) const {
if (!CacheEnabled)
return false;
unsigned SwiftBufferID, Offset;
std::tie(SwiftBufferID, Offset) = getLocInfo(Range.getStart());
Replacement R{Offset, Range.getByteLength(), Text.str()};
if (Replacements.count(R)) {
return true;
} else {
Replacements.insert(R);
}
return false;
}
clang::FileID
EditorAdapter::getClangFileIDForSwiftBufferID(unsigned BufferID) const {
/// Check if we already have a mapping for this BufferID.
auto Found = SwiftToClangBufferMap.find(BufferID);
if (Found != SwiftToClangBufferMap.end()) {
return Found->getSecond();
}
// If we don't copy the corresponding buffer's text into a new buffer
// that the ClangSrcMgr can understand.
auto Text = SwiftSrcMgr.getEntireTextForBuffer(BufferID);
auto NewBuffer = llvm::MemoryBuffer::getMemBufferCopy(Text);
auto NewFileID = ClangSrcMgr.createFileID(std::move(NewBuffer));
SwiftToClangBufferMap.insert({BufferID, NewFileID});
return NewFileID;
}
clang::SourceLocation
EditorAdapter::translateSourceLoc(SourceLoc SwiftLoc) const {
unsigned SwiftBufferID, Offset;
std::tie(SwiftBufferID, Offset) = getLocInfo(SwiftLoc);
auto ClangFileID = getClangFileIDForSwiftBufferID(SwiftBufferID);
return ClangSrcMgr.getLocForStartOfFile(ClangFileID).getLocWithOffset(Offset);
}
clang::SourceRange
EditorAdapter::translateSourceRange(SourceRange SwiftSourceRange) const {
auto Start = translateSourceLoc(SwiftSourceRange.Start);
auto End = translateSourceLoc(SwiftSourceRange.End);
return clang::SourceRange { Start, End };
}
clang::CharSourceRange EditorAdapter::
translateCharSourceRange(CharSourceRange SwiftSourceSourceRange) const {
auto ClangStartLoc = translateSourceLoc(SwiftSourceSourceRange.getStart());
auto ClangEndLoc = translateSourceLoc(SwiftSourceSourceRange.getEnd());
return clang::CharSourceRange::getCharRange(ClangStartLoc, ClangEndLoc);
}
bool EditorAdapter::insert(SourceLoc Loc, StringRef Text, bool AfterToken,
bool BeforePreviousInsertions) {
// We don't have tokens on the clang side, so handle AfterToken in Swift
if (AfterToken)
Loc = Lexer::getLocForEndOfToken(SwiftSrcMgr, Loc);
if (cacheReplacement(CharSourceRange { Loc, 0 }, Text)) {
return true;
}
auto ClangLoc = translateSourceLoc(Loc);
return Edits.insert(ClangLoc, Text, /*AfterToken=*/false, BeforePreviousInsertions);
}
bool EditorAdapter::insertFromRange(SourceLoc Loc, CharSourceRange Range,
bool AfterToken,
bool BeforePreviousInsertions) {
// We don't have tokens on the clang side, so handle AfterToken in Swift
if (AfterToken)
Loc = Lexer::getLocForEndOfToken(SwiftSrcMgr, Loc);
if (cacheReplacement(CharSourceRange { Loc, 0 },
SwiftSrcMgr.extractText(Range))) {
return true;
}
auto ClangLoc = translateSourceLoc(Loc);
auto ClangCharRange = translateCharSourceRange(Range);
return Edits.insertFromRange(ClangLoc, ClangCharRange, /*AfterToken=*/false,
BeforePreviousInsertions);
}
bool EditorAdapter::insertWrap(StringRef Before, CharSourceRange Range,
StringRef After) {
auto ClangRange = translateCharSourceRange(Range);
return Edits.insertWrap(Before, ClangRange, After);
}
bool EditorAdapter::remove(CharSourceRange Range) {
if (cacheReplacement(Range, "")) {
return true;
}
auto ClangRange = translateCharSourceRange(Range);
return Edits.remove(ClangRange);
}
bool EditorAdapter::replace(CharSourceRange Range, StringRef Text) {
if (cacheReplacement(Range, Text)) {
return true;
}
auto ClangRange = translateCharSourceRange(Range);
return Edits.replace(ClangRange, Text);
}
bool EditorAdapter::replaceWithInner(CharSourceRange Range,
CharSourceRange InnerRange) {
if (cacheReplacement(Range, SwiftSrcMgr.extractText(InnerRange))) {
return true;
}
auto ClangRange = translateCharSourceRange(Range);
auto ClangInnerRange = translateCharSourceRange(InnerRange);
return Edits.replaceWithInner(ClangRange, ClangInnerRange);
}
bool EditorAdapter::replaceText(SourceLoc Loc, StringRef Text,
StringRef ReplacementText) {
auto Range = Lexer::getCharSourceRangeFromSourceRange(SwiftSrcMgr,
{ Loc, Loc.getAdvancedLoc(Text.size())});
if (cacheReplacement(Range, Text)) {
return true;
}
auto ClangLoc = translateSourceLoc(Loc);
return Edits.replaceText(ClangLoc, Text, ReplacementText);
}
bool EditorAdapter::insertFromRange(SourceLoc Loc, SourceRange TokenRange,
bool AfterToken,
bool BeforePreviousInsertions) {
auto CharRange = Lexer::getCharSourceRangeFromSourceRange(SwiftSrcMgr, TokenRange);
return insertFromRange(Loc, CharRange,
AfterToken, BeforePreviousInsertions);
}
bool EditorAdapter::insertWrap(StringRef Before, SourceRange TokenRange,
StringRef After) {
auto CharRange = Lexer::getCharSourceRangeFromSourceRange(SwiftSrcMgr, TokenRange);
return insertWrap(Before, CharRange, After);
}
bool EditorAdapter::remove(SourceLoc TokenLoc) {
return remove(Lexer::getCharSourceRangeFromSourceRange(SwiftSrcMgr,
TokenLoc));
}
bool EditorAdapter::remove(SourceRange TokenRange) {
auto CharRange = Lexer::getCharSourceRangeFromSourceRange(SwiftSrcMgr, TokenRange);
return remove(CharRange);
}
bool EditorAdapter::replace(SourceRange TokenRange, StringRef Text) {
auto CharRange = Lexer::getCharSourceRangeFromSourceRange(SwiftSrcMgr,TokenRange);
return replace(CharRange, Text);
}
bool EditorAdapter::replaceWithInner(SourceRange TokenRange,
SourceRange TokenInnerRange) {
auto CharRange = Lexer::getCharSourceRangeFromSourceRange(SwiftSrcMgr, TokenRange);
auto CharInnerRange = Lexer::getCharSourceRangeFromSourceRange(SwiftSrcMgr, TokenInnerRange);
return replaceWithInner(CharRange, CharInnerRange);
}
bool EditorAdapter::replaceToken(SourceLoc TokenLoc, StringRef Text) {
return replace(Lexer::getTokenAtLocation(SwiftSrcMgr, TokenLoc).getRange(),
Text);
}
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