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| //===-- CompletionRequest.cpp -----------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Utility/CompletionRequest.h"
using namespace lldb;
using namespace lldb_private;
CompletionRequest::CompletionRequest(llvm::StringRef command_line,
unsigned raw_cursor_pos,
CompletionResult &result)
: m_command(command_line), m_raw_cursor_pos(raw_cursor_pos),
m_result(result) {
assert(raw_cursor_pos <= command_line.size() && "Out of bounds cursor?");
// We parse the argument up to the cursor, so the last argument in
// parsed_line is the one containing the cursor, and the cursor is after the
// last character.
llvm::StringRef partial_command(command_line.substr(0, raw_cursor_pos));
m_parsed_line = Args(partial_command);
if (GetParsedLine().GetArgumentCount() == 0) {
m_cursor_index = 0;
m_cursor_char_position = 0;
} else {
m_cursor_index = GetParsedLine().GetArgumentCount() - 1U;
m_cursor_char_position =
strlen(GetParsedLine().GetArgumentAtIndex(m_cursor_index));
}
// The cursor is after a space but the space is not part of the argument.
// Let's add an empty fake argument to the end to make sure the completion
// code. Note: The space could be part of the last argument when it's quoted.
if (partial_command.endswith(" ") &&
!GetCursorArgumentPrefix().endswith(" "))
AppendEmptyArgument();
}
std::string CompletionResult::Completion::GetUniqueKey() const {
// We build a unique key for this pair of completion:description. We
// prefix the key with the length of the completion string. This prevents
// that we could get any collisions from completions pairs such as these:
// "foo:", "bar" would be "foo:bar", but will now be: "4foo:bar"
// "foo", ":bar" would be "foo:bar", but will now be: "3foo:bar"
std::string result;
result.append(std::to_string(m_completion.size()));
result.append(m_completion);
result.append(std::to_string(static_cast<int>(m_mode)));
result.append(":");
result.append(m_descripton);
return result;
}
void CompletionResult::AddResult(llvm::StringRef completion,
llvm::StringRef description,
CompletionMode mode) {
Completion r(completion, description, mode);
// Add the completion if we haven't seen the same value before.
if (m_added_values.insert(r.GetUniqueKey()).second)
m_results.push_back(r);
}
void CompletionResult::GetMatches(StringList &matches) const {
matches.Clear();
for (const Completion &completion : m_results)
matches.AppendString(completion.GetCompletion());
}
void CompletionResult::GetDescriptions(StringList &descriptions) const {
descriptions.Clear();
for (const Completion &completion : m_results)
descriptions.AppendString(completion.GetDescription());
}
|