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//===-- CompletionRequest.cpp -----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Utility/CompletionRequest.h"
using namespace lldb;
using namespace lldb_private;
CompletionRequest::CompletionRequest(llvm::StringRef command_line,
unsigned raw_cursor_pos,
int match_start_point,
int max_return_elements,
CompletionResult &result)
: m_command(command_line), m_raw_cursor_pos(raw_cursor_pos),
m_match_start_point(match_start_point),
m_max_return_elements(max_return_elements), m_result(result) {
// 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.
m_parsed_line = Args(command_line);
m_partial_parsed_line = Args(command_line.substr(0, raw_cursor_pos));
m_cursor_index = m_partial_parsed_line.GetArgumentCount() - 1;
if (m_cursor_index == -1)
m_cursor_char_position = 0;
else
m_cursor_char_position =
strlen(m_partial_parsed_line.GetArgumentAtIndex(m_cursor_index));
const char *cursor = command_line.data() + raw_cursor_pos;
if (raw_cursor_pos > 0 && cursor[-1] == ' ') {
// We are just after a space. If we are in an argument, then we will
// continue parsing, but if we are between arguments, then we have to
// complete whatever the next element would be. We can distinguish the two
// cases because if we are in an argument (e.g. because the space is
// protected by a quote) then the space will also be in the parsed
// argument...
const char *current_elem =
m_partial_parsed_line.GetArgumentAtIndex(m_cursor_index);
if (m_cursor_char_position == 0 ||
current_elem[m_cursor_char_position - 1] != ' ') {
m_parsed_line.InsertArgumentAtIndex(m_cursor_index + 1, llvm::StringRef(),
'\0');
m_cursor_index++;
m_cursor_char_position = 0;
}
}
}
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(m_descripton);
return result;
}
void CompletionResult::AddResult(llvm::StringRef completion,
llvm::StringRef description) {
Completion r(completion, description);
// 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.m_completion);
}
void CompletionResult::GetDescriptions(StringList &descriptions) const {
descriptions.Clear();
for (const Completion &completion : m_results)
descriptions.AppendString(completion.m_descripton);
}
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