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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
93 lines
3.6 KiB
C++
93 lines
3.6 KiB
C++
//===-- CompletionRequest.cpp -----------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Utility/CompletionRequest.h"
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using namespace lldb;
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using namespace lldb_private;
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CompletionRequest::CompletionRequest(llvm::StringRef command_line,
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unsigned raw_cursor_pos,
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int match_start_point,
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int max_return_elements,
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CompletionResult &result)
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: m_command(command_line), m_raw_cursor_pos(raw_cursor_pos),
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m_match_start_point(match_start_point),
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m_max_return_elements(max_return_elements), m_result(result) {
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// We parse the argument up to the cursor, so the last argument in
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// parsed_line is the one containing the cursor, and the cursor is after the
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// last character.
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m_parsed_line = Args(command_line);
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m_partial_parsed_line = Args(command_line.substr(0, raw_cursor_pos));
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m_cursor_index = m_partial_parsed_line.GetArgumentCount() - 1;
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if (m_cursor_index == -1)
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m_cursor_char_position = 0;
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else
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m_cursor_char_position =
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strlen(m_partial_parsed_line.GetArgumentAtIndex(m_cursor_index));
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const char *cursor = command_line.data() + raw_cursor_pos;
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if (raw_cursor_pos > 0 && cursor[-1] == ' ') {
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// We are just after a space. If we are in an argument, then we will
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// continue parsing, but if we are between arguments, then we have to
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// complete whatever the next element would be. We can distinguish the two
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// cases because if we are in an argument (e.g. because the space is
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// protected by a quote) then the space will also be in the parsed
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// argument...
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const char *current_elem =
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m_partial_parsed_line.GetArgumentAtIndex(m_cursor_index);
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if (m_cursor_char_position == 0 ||
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current_elem[m_cursor_char_position - 1] != ' ') {
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m_parsed_line.InsertArgumentAtIndex(m_cursor_index + 1, llvm::StringRef(),
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'\0');
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m_cursor_index++;
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m_cursor_char_position = 0;
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}
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}
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}
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std::string CompletionResult::Completion::GetUniqueKey() const {
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// We build a unique key for this pair of completion:description. We
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// prefix the key with the length of the completion string. This prevents
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// that we could get any collisions from completions pairs such as these:
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// "foo:", "bar" would be "foo:bar", but will now be: "4foo:bar"
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// "foo", ":bar" would be "foo:bar", but will now be: "3foo:bar"
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std::string result;
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result.append(std::to_string(m_completion.size()));
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result.append(m_completion);
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result.append(m_descripton);
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return result;
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}
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void CompletionResult::AddResult(llvm::StringRef completion,
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llvm::StringRef description) {
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Completion r(completion, description);
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// Add the completion if we haven't seen the same value before.
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if (m_added_values.insert(r.GetUniqueKey()).second)
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m_results.push_back(r);
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}
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void CompletionResult::GetMatches(StringList &matches) const {
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matches.Clear();
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for (const Completion &completion : m_results)
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matches.AppendString(completion.m_completion);
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}
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void CompletionResult::GetDescriptions(StringList &descriptions) const {
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descriptions.Clear();
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for (const Completion &completion : m_results)
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descriptions.AppendString(completion.m_descripton);
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}
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