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Andrew Top61a84952019-04-30 15:07:33 -07001//===-- CompletionRequest.cpp -----------------------------------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "lldb/Utility/CompletionRequest.h"
11
12using namespace lldb;
13using namespace lldb_private;
14
15CompletionRequest::CompletionRequest(llvm::StringRef command_line,
16 unsigned raw_cursor_pos,
17 int match_start_point,
18 int max_return_elements,
19 StringList &matches)
20 : m_command(command_line), m_raw_cursor_pos(raw_cursor_pos),
21 m_match_start_point(match_start_point),
22 m_max_return_elements(max_return_elements), m_matches(&matches) {
23 matches.Clear();
24
25 // We parse the argument up to the cursor, so the last argument in
26 // parsed_line is the one containing the cursor, and the cursor is after the
27 // last character.
28 m_parsed_line = Args(command_line);
29 m_partial_parsed_line = Args(command_line.substr(0, raw_cursor_pos));
30
31 m_cursor_index = m_partial_parsed_line.GetArgumentCount() - 1;
32
33 if (m_cursor_index == -1)
34 m_cursor_char_position = 0;
35 else
36 m_cursor_char_position =
37 strlen(m_partial_parsed_line.GetArgumentAtIndex(m_cursor_index));
38
39 matches.Clear();
40
41 const char *cursor = command_line.data() + raw_cursor_pos;
42 if (raw_cursor_pos > 0 && cursor[-1] == ' ') {
43 // We are just after a space. If we are in an argument, then we will
44 // continue parsing, but if we are between arguments, then we have to
45 // complete whatever the next element would be. We can distinguish the two
46 // cases because if we are in an argument (e.g. because the space is
47 // protected by a quote) then the space will also be in the parsed
48 // argument...
49
50 const char *current_elem =
51 m_partial_parsed_line.GetArgumentAtIndex(m_cursor_index);
52 if (m_cursor_char_position == 0 ||
53 current_elem[m_cursor_char_position - 1] != ' ') {
54 m_parsed_line.InsertArgumentAtIndex(m_cursor_index + 1, llvm::StringRef(),
55 '\0');
56 m_cursor_index++;
57 m_cursor_char_position = 0;
58 }
59 }
60}