ccls/src/messages/text_document_range_formatting.cc

#include "clang_format.h"
#include "lex_utils.h"
#include "message_handler.h"
#include "queue_manager.h"
#include "working_files.h"

#include <loguru.hpp>

namespace {

struct lsTextDocumentRangeFormattingParams {
  lsTextDocumentIdentifier textDocument;
  lsRange range;
  lsFormattingOptions options;
};
MAKE_REFLECT_STRUCT(lsTextDocumentRangeFormattingParams,
                    textDocument,
                    range,
                    options);

struct Ipc_TextDocumentRangeFormatting
    : public IpcMessage<Ipc_TextDocumentRangeFormatting> {
  const static IpcId kIpcId = IpcId::TextDocumentRangeFormatting;

  lsRequestId id;
  lsTextDocumentRangeFormattingParams params;
};
MAKE_REFLECT_STRUCT(Ipc_TextDocumentRangeFormatting, id, params);
REGISTER_IPC_MESSAGE(Ipc_TextDocumentRangeFormatting);

struct Out_TextDocumentRangeFormatting
    : public lsOutMessage<Out_TextDocumentRangeFormatting> {
  lsRequestId id;
  std::vector<lsTextEdit> result;
};
MAKE_REFLECT_STRUCT(Out_TextDocumentRangeFormatting, jsonrpc, id, result);

struct TextDocumentRangeFormattingHandler
    : BaseMessageHandler<Ipc_TextDocumentRangeFormatting> {
  void Run(Ipc_TextDocumentRangeFormatting* request) override {
    Out_TextDocumentRangeFormatting response;
    response.id = request->id;
#if USE_CLANG_CXX
    QueryFile* file;
    if (!FindFileOrFail(db, project, request->id,
                        request->params.textDocument.uri.GetPath(), &file)) {
      return;
    }

    WorkingFile* working_file =
        working_files->GetFileByFilename(file->def->path);

    int start = GetOffsetForPosition(request->params.range.start,
                                     working_file->buffer_content),
        end = GetOffsetForPosition(request->params.range.end,
                                   working_file->buffer_content);
    response.result = ConvertClangReplacementsIntoTextEdits(
        working_file->buffer_content,
        ClangFormatDocument(working_file, start, end, request->params.options));
#else
    LOG_S(WARNING) << "You must compile cquery with --use-clang-cxx to use "
                      "textDocument/rangeFormatting.";
    // TODO: Fallback to execute the clang-format binary?
    response.result = {};
#endif

    QueueManager::WriteStdout(IpcId::TextDocumentRangeFormatting, response);
  }
};
REGISTER_MESSAGE_HANDLER(TextDocumentRangeFormattingHandler);
}  // namespace