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1 //===-- Editline.cpp ------------------------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include <iomanip>
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10 #include <iostream>
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11 #include <limits.h>
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12
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13 #include "lldb/Host/ConnectionFileDescriptor.h"
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14 #include "lldb/Host/Editline.h"
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15 #include "lldb/Host/FileSystem.h"
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16 #include "lldb/Host/Host.h"
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17 #include "lldb/Utility/CompletionRequest.h"
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18 #include "lldb/Utility/FileSpec.h"
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19 #include "lldb/Utility/LLDBAssert.h"
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20 #include "lldb/Utility/SelectHelper.h"
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21 #include "lldb/Utility/Status.h"
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22 #include "lldb/Utility/StreamString.h"
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23 #include "lldb/Utility/StringList.h"
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24 #include "lldb/Utility/Timeout.h"
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25
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26 #include "llvm/Support/FileSystem.h"
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27 #include "llvm/Support/Threading.h"
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28
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29 using namespace lldb_private;
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30 using namespace lldb_private::line_editor;
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31
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32 // Workaround for what looks like an OS X-specific issue, but other platforms
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33 // may benefit from something similar if issues arise. The libedit library
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34 // doesn't explicitly initialize the curses termcap library, which it gets away
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35 // with until TERM is set to VT100 where it stumbles over an implementation
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36 // assumption that may not exist on other platforms. The setupterm() function
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37 // would normally require headers that don't work gracefully in this context,
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38 // so the function declaraction has been hoisted here.
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39 #if defined(__APPLE__)
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40 extern "C" {
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41 int setupterm(char *term, int fildes, int *errret);
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42 }
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43 #define USE_SETUPTERM_WORKAROUND
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44 #endif
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45
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46 // Editline uses careful cursor management to achieve the illusion of editing a
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47 // multi-line block of text with a single line editor. Preserving this
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48 // illusion requires fairly careful management of cursor state. Read and
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49 // understand the relationship between DisplayInput(), MoveCursor(),
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50 // SetCurrentLine(), and SaveEditedLine() before making changes.
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51
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52 #define ESCAPE "\x1b"
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53 #define ANSI_FAINT ESCAPE "[2m"
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54 #define ANSI_UNFAINT ESCAPE "[22m"
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55 #define ANSI_CLEAR_BELOW ESCAPE "[J"
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56 #define ANSI_CLEAR_RIGHT ESCAPE "[K"
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57 #define ANSI_SET_COLUMN_N ESCAPE "[%dG"
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58 #define ANSI_UP_N_ROWS ESCAPE "[%dA"
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59 #define ANSI_DOWN_N_ROWS ESCAPE "[%dB"
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60
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61 #if LLDB_EDITLINE_USE_WCHAR
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62
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63 #define EditLineConstString(str) L##str
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64 #define EditLineStringFormatSpec "%ls"
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65
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66 #else
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67
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68 #define EditLineConstString(str) str
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69 #define EditLineStringFormatSpec "%s"
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70
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71 // use #defines so wide version functions and structs will resolve to old
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72 // versions for case of libedit not built with wide char support
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73 #define history_w history
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74 #define history_winit history_init
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75 #define history_wend history_end
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76 #define HistoryW History
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77 #define HistEventW HistEvent
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78 #define LineInfoW LineInfo
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79
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80 #define el_wgets el_gets
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81 #define el_wgetc el_getc
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82 #define el_wpush el_push
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83 #define el_wparse el_parse
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84 #define el_wset el_set
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85 #define el_wget el_get
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86 #define el_wline el_line
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87 #define el_winsertstr el_insertstr
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88 #define el_wdeletestr el_deletestr
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89
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90 #endif // #if LLDB_EDITLINE_USE_WCHAR
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91
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92 bool IsOnlySpaces(const EditLineStringType &content) {
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93 for (wchar_t ch : content) {
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94 if (ch != EditLineCharType(' '))
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95 return false;
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96 }
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97 return true;
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98 }
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99
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100 static int GetOperation(HistoryOperation op) {
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101 // The naming used by editline for the history operations is counter
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102 // intuitive to how it's used here.
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103 //
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104 // - The H_PREV operation returns the previous element in the history, which
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105 // is newer than the current one.
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106 //
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107 // - The H_NEXT operation returns the next element in the history, which is
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108 // older than the current one.
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109 //
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110 // The naming of the enum entries match the semantic meaning.
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111 switch(op) {
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112 case HistoryOperation::Oldest:
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113 return H_FIRST;
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114 case HistoryOperation::Older:
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115 return H_NEXT;
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116 case HistoryOperation::Current:
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117 return H_CURR;
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118 case HistoryOperation::Newer:
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119 return H_PREV;
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120 case HistoryOperation::Newest:
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121 return H_LAST;
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122 }
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123 llvm_unreachable("Fully covered switch!");
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124 }
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125
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126
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127 EditLineStringType CombineLines(const std::vector<EditLineStringType> &lines) {
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128 EditLineStringStreamType combined_stream;
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129 for (EditLineStringType line : lines) {
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130 combined_stream << line.c_str() << "\n";
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131 }
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132 return combined_stream.str();
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133 }
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134
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135 std::vector<EditLineStringType> SplitLines(const EditLineStringType &input) {
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136 std::vector<EditLineStringType> result;
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137 size_t start = 0;
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138 while (start < input.length()) {
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139 size_t end = input.find('\n', start);
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140 if (end == std::string::npos) {
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141 result.insert(result.end(), input.substr(start));
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142 break;
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143 }
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144 result.insert(result.end(), input.substr(start, end - start));
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145 start = end + 1;
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146 }
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147 return result;
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148 }
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149
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150 EditLineStringType FixIndentation(const EditLineStringType &line,
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151 int indent_correction) {
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152 if (indent_correction == 0)
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153 return line;
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154 if (indent_correction < 0)
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155 return line.substr(-indent_correction);
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156 return EditLineStringType(indent_correction, EditLineCharType(' ')) + line;
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157 }
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158
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159 int GetIndentation(const EditLineStringType &line) {
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160 int space_count = 0;
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161 for (EditLineCharType ch : line) {
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162 if (ch != EditLineCharType(' '))
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163 break;
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164 ++space_count;
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165 }
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166 return space_count;
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167 }
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168
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169 bool IsInputPending(FILE *file) {
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170 // FIXME: This will be broken on Windows if we ever re-enable Editline. You
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171 // can't use select
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172 // on something that isn't a socket. This will have to be re-written to not
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173 // use a FILE*, but instead use some kind of yet-to-be-created abstraction
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174 // that select-like functionality on non-socket objects.
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175 const int fd = fileno(file);
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176 SelectHelper select_helper;
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177 select_helper.SetTimeout(std::chrono::microseconds(0));
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178 select_helper.FDSetRead(fd);
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179 return select_helper.Select().Success();
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180 }
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181
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182 namespace lldb_private {
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183 namespace line_editor {
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184 typedef std::weak_ptr<EditlineHistory> EditlineHistoryWP;
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185
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186 // EditlineHistory objects are sometimes shared between multiple Editline
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187 // instances with the same program name.
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188
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189 class EditlineHistory {
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190 private:
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191 // Use static GetHistory() function to get a EditlineHistorySP to one of
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192 // these objects
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193 EditlineHistory(const std::string &prefix, uint32_t size, bool unique_entries)
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194 : m_history(nullptr), m_event(), m_prefix(prefix), m_path() {
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195 m_history = history_winit();
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196 history_w(m_history, &m_event, H_SETSIZE, size);
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197 if (unique_entries)
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198 history_w(m_history, &m_event, H_SETUNIQUE, 1);
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199 }
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200
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201 const char *GetHistoryFilePath() {
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202 // Compute the history path lazily.
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203 if (m_path.empty() && m_history && !m_prefix.empty()) {
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204 llvm::SmallString<128> lldb_history_file;
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205 llvm::sys::path::home_directory(lldb_history_file);
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206 llvm::sys::path::append(lldb_history_file, ".lldb");
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207
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208 // LLDB stores its history in ~/.lldb/. If for some reason this directory
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209 // isn't writable or cannot be created, history won't be available.
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210 if (!llvm::sys::fs::create_directory(lldb_history_file)) {
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211 #if LLDB_EDITLINE_USE_WCHAR
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212 std::string filename = m_prefix + "-widehistory";
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213 #else
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214 std::string filename = m_prefix + "-history";
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215 #endif
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216 llvm::sys::path::append(lldb_history_file, filename);
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217 m_path = std::string(lldb_history_file.str());
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218 }
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219 }
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220
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221 if (m_path.empty())
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222 return nullptr;
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223
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224 return m_path.c_str();
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225 }
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226
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227 public:
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228 ~EditlineHistory() {
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229 Save();
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230
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231 if (m_history) {
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232 history_wend(m_history);
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233 m_history = nullptr;
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234 }
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235 }
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236
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237 static EditlineHistorySP GetHistory(const std::string &prefix) {
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238 typedef std::map<std::string, EditlineHistoryWP> WeakHistoryMap;
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239 static std::recursive_mutex g_mutex;
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240 static WeakHistoryMap g_weak_map;
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241 std::lock_guard<std::recursive_mutex> guard(g_mutex);
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242 WeakHistoryMap::const_iterator pos = g_weak_map.find(prefix);
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243 EditlineHistorySP history_sp;
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244 if (pos != g_weak_map.end()) {
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245 history_sp = pos->second.lock();
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246 if (history_sp)
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247 return history_sp;
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248 g_weak_map.erase(pos);
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249 }
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250 history_sp.reset(new EditlineHistory(prefix, 800, true));
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251 g_weak_map[prefix] = history_sp;
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252 return history_sp;
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253 }
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254
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255 bool IsValid() const { return m_history != nullptr; }
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256
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257 HistoryW *GetHistoryPtr() { return m_history; }
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258
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259 void Enter(const EditLineCharType *line_cstr) {
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260 if (m_history)
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261 history_w(m_history, &m_event, H_ENTER, line_cstr);
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262 }
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263
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264 bool Load() {
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265 if (m_history) {
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266 const char *path = GetHistoryFilePath();
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267 if (path) {
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268 history_w(m_history, &m_event, H_LOAD, path);
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269 return true;
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270 }
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271 }
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272 return false;
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273 }
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274
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275 bool Save() {
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276 if (m_history) {
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277 const char *path = GetHistoryFilePath();
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278 if (path) {
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279 history_w(m_history, &m_event, H_SAVE, path);
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280 return true;
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281 }
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282 }
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283 return false;
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284 }
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285
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286 protected:
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287 HistoryW *m_history; // The history object
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288 HistEventW m_event; // The history event needed to contain all history events
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289 std::string m_prefix; // The prefix name (usually the editline program name)
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290 // to use when loading/saving history
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291 std::string m_path; // Path to the history file
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292 };
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293 }
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294 }
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295
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296 // Editline private methods
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297
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298 void Editline::SetBaseLineNumber(int line_number) {
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299 std::stringstream line_number_stream;
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300 line_number_stream << line_number;
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301 m_base_line_number = line_number;
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302 m_line_number_digits =
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303 std::max(3, (int)line_number_stream.str().length() + 1);
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304 }
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305
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306 std::string Editline::PromptForIndex(int line_index) {
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307 bool use_line_numbers = m_multiline_enabled && m_base_line_number > 0;
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308 std::string prompt = m_set_prompt;
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309 if (use_line_numbers && prompt.length() == 0) {
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310 prompt = ": ";
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311 }
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312 std::string continuation_prompt = prompt;
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313 if (m_set_continuation_prompt.length() > 0) {
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314 continuation_prompt = m_set_continuation_prompt;
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315
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316 // Ensure that both prompts are the same length through space padding
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317 while (continuation_prompt.length() < prompt.length()) {
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318 continuation_prompt += ' ';
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319 }
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320 while (prompt.length() < continuation_prompt.length()) {
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321 prompt += ' ';
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322 }
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323 }
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324
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325 if (use_line_numbers) {
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326 StreamString prompt_stream;
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327 prompt_stream.Printf(
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328 "%*d%s", m_line_number_digits, m_base_line_number + line_index,
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329 (line_index == 0) ? prompt.c_str() : continuation_prompt.c_str());
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330 return std::string(std::move(prompt_stream.GetString()));
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331 }
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332 return (line_index == 0) ? prompt : continuation_prompt;
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333 }
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334
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335 void Editline::SetCurrentLine(int line_index) {
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336 m_current_line_index = line_index;
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337 m_current_prompt = PromptForIndex(line_index);
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338 }
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339
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340 int Editline::GetPromptWidth() { return (int)PromptForIndex(0).length(); }
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341
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342 bool Editline::IsEmacs() {
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343 const char *editor;
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344 el_get(m_editline, EL_EDITOR, &editor);
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345 return editor[0] == 'e';
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346 }
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347
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348 bool Editline::IsOnlySpaces() {
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349 const LineInfoW *info = el_wline(m_editline);
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350 for (const EditLineCharType *character = info->buffer;
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351 character < info->lastchar; character++) {
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352 if (*character != ' ')
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353 return false;
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354 }
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355 return true;
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356 }
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357
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358 int Editline::GetLineIndexForLocation(CursorLocation location, int cursor_row) {
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359 int line = 0;
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360 if (location == CursorLocation::EditingPrompt ||
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361 location == CursorLocation::BlockEnd ||
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362 location == CursorLocation::EditingCursor) {
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363 for (unsigned index = 0; index < m_current_line_index; index++) {
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364 line += CountRowsForLine(m_input_lines[index]);
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365 }
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366 if (location == CursorLocation::EditingCursor) {
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367 line += cursor_row;
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368 } else if (location == CursorLocation::BlockEnd) {
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369 for (unsigned index = m_current_line_index; index < m_input_lines.size();
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370 index++) {
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371 line += CountRowsForLine(m_input_lines[index]);
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372 }
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373 --line;
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374 }
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375 }
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376 return line;
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377 }
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378
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379 void Editline::MoveCursor(CursorLocation from, CursorLocation to) {
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380 const LineInfoW *info = el_wline(m_editline);
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381 int editline_cursor_position =
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382 (int)((info->cursor - info->buffer) + GetPromptWidth());
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383 int editline_cursor_row = editline_cursor_position / m_terminal_width;
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384
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385 // Determine relative starting and ending lines
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386 int fromLine = GetLineIndexForLocation(from, editline_cursor_row);
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387 int toLine = GetLineIndexForLocation(to, editline_cursor_row);
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388 if (toLine != fromLine) {
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389 fprintf(m_output_file,
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390 (toLine > fromLine) ? ANSI_DOWN_N_ROWS : ANSI_UP_N_ROWS,
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391 std::abs(toLine - fromLine));
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392 }
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393
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394 // Determine target column
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395 int toColumn = 1;
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396 if (to == CursorLocation::EditingCursor) {
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397 toColumn =
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398 editline_cursor_position - (editline_cursor_row * m_terminal_width) + 1;
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399 } else if (to == CursorLocation::BlockEnd && !m_input_lines.empty()) {
|
|
|
400 toColumn =
|
|
|
401 ((m_input_lines[m_input_lines.size() - 1].length() + GetPromptWidth()) %
|
|
|
402 80) +
|
|
|
403 1;
|
|
|
404 }
|
|
|
405 fprintf(m_output_file, ANSI_SET_COLUMN_N, toColumn);
|
|
|
406 }
|
|
|
407
|
|
|
408 void Editline::DisplayInput(int firstIndex) {
|
|
|
409 fprintf(m_output_file, ANSI_SET_COLUMN_N ANSI_CLEAR_BELOW, 1);
|
|
|
410 int line_count = (int)m_input_lines.size();
|
|
|
411 const char *faint = m_color_prompts ? ANSI_FAINT : "";
|
|
|
412 const char *unfaint = m_color_prompts ? ANSI_UNFAINT : "";
|
|
|
413
|
|
|
414 for (int index = firstIndex; index < line_count; index++) {
|
|
|
415 fprintf(m_output_file, "%s"
|
|
|
416 "%s"
|
|
|
417 "%s" EditLineStringFormatSpec " ",
|
|
|
418 faint, PromptForIndex(index).c_str(), unfaint,
|
|
|
419 m_input_lines[index].c_str());
|
|
|
420 if (index < line_count - 1)
|
|
|
421 fprintf(m_output_file, "\n");
|
|
|
422 }
|
|
|
423 }
|
|
|
424
|
|
|
425 int Editline::CountRowsForLine(const EditLineStringType &content) {
|
|
|
426 auto prompt =
|
|
|
427 PromptForIndex(0); // Prompt width is constant during an edit session
|
|
|
428 int line_length = (int)(content.length() + prompt.length());
|
|
|
429 return (line_length / m_terminal_width) + 1;
|
|
|
430 }
|
|
|
431
|
|
|
432 void Editline::SaveEditedLine() {
|
|
|
433 const LineInfoW *info = el_wline(m_editline);
|
|
|
434 m_input_lines[m_current_line_index] =
|
|
|
435 EditLineStringType(info->buffer, info->lastchar - info->buffer);
|
|
|
436 }
|
|
|
437
|
|
|
438 StringList Editline::GetInputAsStringList(int line_count) {
|
|
|
439 StringList lines;
|
|
|
440 for (EditLineStringType line : m_input_lines) {
|
|
|
441 if (line_count == 0)
|
|
|
442 break;
|
|
|
443 #if LLDB_EDITLINE_USE_WCHAR
|
|
|
444 lines.AppendString(m_utf8conv.to_bytes(line));
|
|
|
445 #else
|
|
|
446 lines.AppendString(line);
|
|
|
447 #endif
|
|
|
448 --line_count;
|
|
|
449 }
|
|
|
450 return lines;
|
|
|
451 }
|
|
|
452
|
|
|
453 unsigned char Editline::RecallHistory(HistoryOperation op) {
|
|
|
454 assert(op == HistoryOperation::Older || op == HistoryOperation::Newer);
|
|
|
455 if (!m_history_sp || !m_history_sp->IsValid())
|
|
|
456 return CC_ERROR;
|
|
|
457
|
|
|
458 HistoryW *pHistory = m_history_sp->GetHistoryPtr();
|
|
|
459 HistEventW history_event;
|
|
|
460 std::vector<EditLineStringType> new_input_lines;
|
|
|
461
|
|
|
462 // Treat moving from the "live" entry differently
|
|
|
463 if (!m_in_history) {
|
|
|
464 switch (op) {
|
|
|
465 case HistoryOperation::Newer:
|
|
|
466 return CC_ERROR; // Can't go newer than the "live" entry
|
|
|
467 case HistoryOperation::Older: {
|
|
|
468 if (history_w(pHistory, &history_event,
|
|
|
469 GetOperation(HistoryOperation::Newest)) == -1)
|
|
|
470 return CC_ERROR;
|
|
|
471 // Save any edits to the "live" entry in case we return by moving forward
|
|
|
472 // in history (it would be more bash-like to save over any current entry,
|
|
|
473 // but libedit doesn't offer the ability to add entries anywhere except
|
|
|
474 // the end.)
|
|
|
475 SaveEditedLine();
|
|
|
476 m_live_history_lines = m_input_lines;
|
|
|
477 m_in_history = true;
|
|
|
478 } break;
|
|
|
479 default:
|
|
|
480 llvm_unreachable("unsupported history direction");
|
|
|
481 }
|
|
|
482 } else {
|
|
|
483 if (history_w(pHistory, &history_event, GetOperation(op)) == -1) {
|
|
|
484 switch (op) {
|
|
|
485 case HistoryOperation::Older:
|
|
|
486 // Can't move earlier than the earliest entry.
|
|
|
487 return CC_ERROR;
|
|
|
488 case HistoryOperation::Newer:
|
|
|
489 // Moving to newer-than-the-newest entry yields the "live" entry.
|
|
|
490 new_input_lines = m_live_history_lines;
|
|
|
491 m_in_history = false;
|
|
|
492 break;
|
|
|
493 default:
|
|
|
494 llvm_unreachable("unsupported history direction");
|
|
|
495 }
|
|
|
496 }
|
|
|
497 }
|
|
|
498
|
|
|
499 // If we're pulling the lines from history, split them apart
|
|
|
500 if (m_in_history)
|
|
|
501 new_input_lines = SplitLines(history_event.str);
|
|
|
502
|
|
|
503 // Erase the current edit session and replace it with a new one
|
|
|
504 MoveCursor(CursorLocation::EditingCursor, CursorLocation::BlockStart);
|
|
|
505 m_input_lines = new_input_lines;
|
|
|
506 DisplayInput();
|
|
|
507
|
|
|
508 // Prepare to edit the last line when moving to previous entry, or the first
|
|
|
509 // line when moving to next entry
|
|
|
510 switch (op) {
|
|
|
511 case HistoryOperation::Older:
|
|
|
512 m_current_line_index = (int)m_input_lines.size() - 1;
|
|
|
513 break;
|
|
|
514 case HistoryOperation::Newer:
|
|
|
515 m_current_line_index = 0;
|
|
|
516 break;
|
|
|
517 default:
|
|
|
518 llvm_unreachable("unsupported history direction");
|
|
|
519 }
|
|
|
520 SetCurrentLine(m_current_line_index);
|
|
|
521 MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingPrompt);
|
|
|
522 return CC_NEWLINE;
|
|
|
523 }
|
|
|
524
|
|
|
525 int Editline::GetCharacter(EditLineGetCharType *c) {
|
|
|
526 const LineInfoW *info = el_wline(m_editline);
|
|
|
527
|
|
|
528 // Paint a faint version of the desired prompt over the version libedit draws
|
|
|
529 // (will only be requested if colors are supported)
|
|
|
530 if (m_needs_prompt_repaint) {
|
|
|
531 MoveCursor(CursorLocation::EditingCursor, CursorLocation::EditingPrompt);
|
|
|
532 fprintf(m_output_file, "%s"
|
|
|
533 "%s"
|
|
|
534 "%s",
|
|
|
535 ANSI_FAINT, Prompt(), ANSI_UNFAINT);
|
|
|
536 MoveCursor(CursorLocation::EditingPrompt, CursorLocation::EditingCursor);
|
|
|
537 m_needs_prompt_repaint = false;
|
|
|
538 }
|
|
|
539
|
|
|
540 if (m_multiline_enabled) {
|
|
|
541 // Detect when the number of rows used for this input line changes due to
|
|
|
542 // an edit
|
|
|
543 int lineLength = (int)((info->lastchar - info->buffer) + GetPromptWidth());
|
|
|
544 int new_line_rows = (lineLength / m_terminal_width) + 1;
|
|
|
545 if (m_current_line_rows != -1 && new_line_rows != m_current_line_rows) {
|
|
|
546 // Respond by repainting the current state from this line on
|
|
|
547 MoveCursor(CursorLocation::EditingCursor, CursorLocation::EditingPrompt);
|
|
|
548 SaveEditedLine();
|
|
|
549 DisplayInput(m_current_line_index);
|
|
|
550 MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingCursor);
|
|
|
551 }
|
|
|
552 m_current_line_rows = new_line_rows;
|
|
|
553 }
|
|
|
554
|
|
|
555 // Read an actual character
|
|
|
556 while (true) {
|
|
|
557 lldb::ConnectionStatus status = lldb::eConnectionStatusSuccess;
|
|
|
558 char ch = 0;
|
|
|
559
|
|
|
560 // This mutex is locked by our caller (GetLine). Unlock it while we read a
|
|
|
561 // character (blocking operation), so we do not hold the mutex
|
|
|
562 // indefinitely. This gives a chance for someone to interrupt us. After
|
|
|
563 // Read returns, immediately lock the mutex again and check if we were
|
|
|
564 // interrupted.
|
|
|
565 m_output_mutex.unlock();
|
|
|
566 int read_count =
|
|
|
567 m_input_connection.Read(&ch, 1, llvm::None, status, nullptr);
|
|
|
568 m_output_mutex.lock();
|
|
|
569 if (m_editor_status == EditorStatus::Interrupted) {
|
|
|
570 while (read_count > 0 && status == lldb::eConnectionStatusSuccess)
|
|
|
571 read_count =
|
|
|
572 m_input_connection.Read(&ch, 1, llvm::None, status, nullptr);
|
|
|
573 lldbassert(status == lldb::eConnectionStatusInterrupted);
|
|
|
574 return 0;
|
|
|
575 }
|
|
|
576
|
|
|
577 if (read_count) {
|
|
|
578 if (CompleteCharacter(ch, *c))
|
|
|
579 return 1;
|
|
|
580 } else {
|
|
|
581 switch (status) {
|
|
|
582 case lldb::eConnectionStatusSuccess: // Success
|
|
|
583 break;
|
|
|
584
|
|
|
585 case lldb::eConnectionStatusInterrupted:
|
|
|
586 llvm_unreachable("Interrupts should have been handled above.");
|
|
|
587
|
|
|
588 case lldb::eConnectionStatusError: // Check GetError() for details
|
|
|
589 case lldb::eConnectionStatusTimedOut: // Request timed out
|
|
|
590 case lldb::eConnectionStatusEndOfFile: // End-of-file encountered
|
|
|
591 case lldb::eConnectionStatusNoConnection: // No connection
|
|
|
592 case lldb::eConnectionStatusLostConnection: // Lost connection while
|
|
|
593 // connected to a valid
|
|
|
594 // connection
|
|
|
595 m_editor_status = EditorStatus::EndOfInput;
|
|
|
596 return 0;
|
|
|
597 }
|
|
|
598 }
|
|
|
599 }
|
|
|
600 }
|
|
|
601
|
|
|
602 const char *Editline::Prompt() {
|
|
|
603 if (m_color_prompts)
|
|
|
604 m_needs_prompt_repaint = true;
|
|
|
605 return m_current_prompt.c_str();
|
|
|
606 }
|
|
|
607
|
|
|
608 unsigned char Editline::BreakLineCommand(int ch) {
|
|
|
609 // Preserve any content beyond the cursor, truncate and save the current line
|
|
|
610 const LineInfoW *info = el_wline(m_editline);
|
|
|
611 auto current_line =
|
|
|
612 EditLineStringType(info->buffer, info->cursor - info->buffer);
|
|
|
613 auto new_line_fragment =
|
|
|
614 EditLineStringType(info->cursor, info->lastchar - info->cursor);
|
|
|
615 m_input_lines[m_current_line_index] = current_line;
|
|
|
616
|
|
|
617 // Ignore whitespace-only extra fragments when breaking a line
|
|
|
618 if (::IsOnlySpaces(new_line_fragment))
|
|
|
619 new_line_fragment = EditLineConstString("");
|
|
|
620
|
|
|
621 // Establish the new cursor position at the start of a line when inserting a
|
|
|
622 // line break
|
|
|
623 m_revert_cursor_index = 0;
|
|
|
624
|
|
|
625 // Don't perform automatic formatting when pasting
|
|
|
626 if (!IsInputPending(m_input_file)) {
|
|
|
627 // Apply smart indentation
|
|
|
628 if (m_fix_indentation_callback) {
|
|
|
629 StringList lines = GetInputAsStringList(m_current_line_index + 1);
|
|
|
630 #if LLDB_EDITLINE_USE_WCHAR
|
|
|
631 lines.AppendString(m_utf8conv.to_bytes(new_line_fragment));
|
|
|
632 #else
|
|
|
633 lines.AppendString(new_line_fragment);
|
|
|
634 #endif
|
|
|
635
|
|
|
636 int indent_correction = m_fix_indentation_callback(
|
|
|
637 this, lines, 0, m_fix_indentation_callback_baton);
|
|
|
638 new_line_fragment = FixIndentation(new_line_fragment, indent_correction);
|
|
|
639 m_revert_cursor_index = GetIndentation(new_line_fragment);
|
|
|
640 }
|
|
|
641 }
|
|
|
642
|
|
|
643 // Insert the new line and repaint everything from the split line on down
|
|
|
644 m_input_lines.insert(m_input_lines.begin() + m_current_line_index + 1,
|
|
|
645 new_line_fragment);
|
|
|
646 MoveCursor(CursorLocation::EditingCursor, CursorLocation::EditingPrompt);
|
|
|
647 DisplayInput(m_current_line_index);
|
|
|
648
|
|
|
649 // Reposition the cursor to the right line and prepare to edit the new line
|
|
|
650 SetCurrentLine(m_current_line_index + 1);
|
|
|
651 MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingPrompt);
|
|
|
652 return CC_NEWLINE;
|
|
|
653 }
|
|
|
654
|
|
|
655 unsigned char Editline::EndOrAddLineCommand(int ch) {
|
|
|
656 // Don't perform end of input detection when pasting, always treat this as a
|
|
|
657 // line break
|
|
|
658 if (IsInputPending(m_input_file)) {
|
|
|
659 return BreakLineCommand(ch);
|
|
|
660 }
|
|
|
661
|
|
|
662 // Save any edits to this line
|
|
|
663 SaveEditedLine();
|
|
|
664
|
|
|
665 // If this is the end of the last line, consider whether to add a line
|
|
|
666 // instead
|
|
|
667 const LineInfoW *info = el_wline(m_editline);
|
|
|
668 if (m_current_line_index == m_input_lines.size() - 1 &&
|
|
|
669 info->cursor == info->lastchar) {
|
|
|
670 if (m_is_input_complete_callback) {
|
|
|
671 auto lines = GetInputAsStringList();
|
|
|
672 if (!m_is_input_complete_callback(this, lines,
|
|
|
673 m_is_input_complete_callback_baton)) {
|
|
|
674 return BreakLineCommand(ch);
|
|
|
675 }
|
|
|
676
|
|
|
677 // The completion test is allowed to change the input lines when complete
|
|
|
678 m_input_lines.clear();
|
|
|
679 for (unsigned index = 0; index < lines.GetSize(); index++) {
|
|
|
680 #if LLDB_EDITLINE_USE_WCHAR
|
|
|
681 m_input_lines.insert(m_input_lines.end(),
|
|
|
682 m_utf8conv.from_bytes(lines[index]));
|
|
|
683 #else
|
|
|
684 m_input_lines.insert(m_input_lines.end(), lines[index]);
|
|
|
685 #endif
|
|
|
686 }
|
|
|
687 }
|
|
|
688 }
|
|
|
689 MoveCursor(CursorLocation::EditingCursor, CursorLocation::BlockEnd);
|
|
|
690 fprintf(m_output_file, "\n");
|
|
|
691 m_editor_status = EditorStatus::Complete;
|
|
|
692 return CC_NEWLINE;
|
|
|
693 }
|
|
|
694
|
|
|
695 unsigned char Editline::DeleteNextCharCommand(int ch) {
|
|
|
696 LineInfoW *info = const_cast<LineInfoW *>(el_wline(m_editline));
|
|
|
697
|
|
|
698 // Just delete the next character normally if possible
|
|
|
699 if (info->cursor < info->lastchar) {
|
|
|
700 info->cursor++;
|
|
|
701 el_deletestr(m_editline, 1);
|
|
|
702 return CC_REFRESH;
|
|
|
703 }
|
|
|
704
|
|
|
705 // Fail when at the end of the last line, except when ^D is pressed on the
|
|
|
706 // line is empty, in which case it is treated as EOF
|
|
|
707 if (m_current_line_index == m_input_lines.size() - 1) {
|
|
|
708 if (ch == 4 && info->buffer == info->lastchar) {
|
|
|
709 fprintf(m_output_file, "^D\n");
|
|
|
710 m_editor_status = EditorStatus::EndOfInput;
|
|
|
711 return CC_EOF;
|
|
|
712 }
|
|
|
713 return CC_ERROR;
|
|
|
714 }
|
|
|
715
|
|
|
716 // Prepare to combine this line with the one below
|
|
|
717 MoveCursor(CursorLocation::EditingCursor, CursorLocation::EditingPrompt);
|
|
|
718
|
|
|
719 // Insert the next line of text at the cursor and restore the cursor position
|
|
|
720 const EditLineCharType *cursor = info->cursor;
|
|
|
721 el_winsertstr(m_editline, m_input_lines[m_current_line_index + 1].c_str());
|
|
|
722 info->cursor = cursor;
|
|
|
723 SaveEditedLine();
|
|
|
724
|
|
|
725 // Delete the extra line
|
|
|
726 m_input_lines.erase(m_input_lines.begin() + m_current_line_index + 1);
|
|
|
727
|
|
|
728 // Clear and repaint from this line on down
|
|
|
729 DisplayInput(m_current_line_index);
|
|
|
730 MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingCursor);
|
|
|
731 return CC_REFRESH;
|
|
|
732 }
|
|
|
733
|
|
|
734 unsigned char Editline::DeletePreviousCharCommand(int ch) {
|
|
|
735 LineInfoW *info = const_cast<LineInfoW *>(el_wline(m_editline));
|
|
|
736
|
|
|
737 // Just delete the previous character normally when not at the start of a
|
|
|
738 // line
|
|
|
739 if (info->cursor > info->buffer) {
|
|
|
740 el_deletestr(m_editline, 1);
|
|
|
741 return CC_REFRESH;
|
|
|
742 }
|
|
|
743
|
|
|
744 // No prior line and no prior character? Let the user know
|
|
|
745 if (m_current_line_index == 0)
|
|
|
746 return CC_ERROR;
|
|
|
747
|
|
|
748 // No prior character, but prior line? Combine with the line above
|
|
|
749 SaveEditedLine();
|
|
|
750 SetCurrentLine(m_current_line_index - 1);
|
|
|
751 auto priorLine = m_input_lines[m_current_line_index];
|
|
|
752 m_input_lines.erase(m_input_lines.begin() + m_current_line_index);
|
|
|
753 m_input_lines[m_current_line_index] =
|
|
|
754 priorLine + m_input_lines[m_current_line_index];
|
|
|
755
|
|
|
756 // Repaint from the new line down
|
|
|
757 fprintf(m_output_file, ANSI_UP_N_ROWS ANSI_SET_COLUMN_N,
|
|
|
758 CountRowsForLine(priorLine), 1);
|
|
|
759 DisplayInput(m_current_line_index);
|
|
|
760
|
|
|
761 // Put the cursor back where libedit expects it to be before returning to
|
|
|
762 // editing by telling libedit about the newly inserted text
|
|
|
763 MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingPrompt);
|
|
|
764 el_winsertstr(m_editline, priorLine.c_str());
|
|
|
765 return CC_REDISPLAY;
|
|
|
766 }
|
|
|
767
|
|
|
768 unsigned char Editline::PreviousLineCommand(int ch) {
|
|
|
769 SaveEditedLine();
|
|
|
770
|
|
|
771 if (m_current_line_index == 0) {
|
|
|
772 return RecallHistory(HistoryOperation::Older);
|
|
|
773 }
|
|
|
774
|
|
|
775 // Start from a known location
|
|
|
776 MoveCursor(CursorLocation::EditingCursor, CursorLocation::EditingPrompt);
|
|
|
777
|
|
|
778 // Treat moving up from a blank last line as a deletion of that line
|
|
|
779 if (m_current_line_index == m_input_lines.size() - 1 && IsOnlySpaces()) {
|
|
|
780 m_input_lines.erase(m_input_lines.begin() + m_current_line_index);
|
|
|
781 fprintf(m_output_file, ANSI_CLEAR_BELOW);
|
|
|
782 }
|
|
|
783
|
|
|
784 SetCurrentLine(m_current_line_index - 1);
|
|
|
785 fprintf(m_output_file, ANSI_UP_N_ROWS ANSI_SET_COLUMN_N,
|
|
|
786 CountRowsForLine(m_input_lines[m_current_line_index]), 1);
|
|
|
787 return CC_NEWLINE;
|
|
|
788 }
|
|
|
789
|
|
|
790 unsigned char Editline::NextLineCommand(int ch) {
|
|
|
791 SaveEditedLine();
|
|
|
792
|
|
|
793 // Handle attempts to move down from the last line
|
|
|
794 if (m_current_line_index == m_input_lines.size() - 1) {
|
|
|
795 // Don't add an extra line if the existing last line is blank, move through
|
|
|
796 // history instead
|
|
|
797 if (IsOnlySpaces()) {
|
|
|
798 return RecallHistory(HistoryOperation::Newer);
|
|
|
799 }
|
|
|
800
|
|
|
801 // Determine indentation for the new line
|
|
|
802 int indentation = 0;
|
|
|
803 if (m_fix_indentation_callback) {
|
|
|
804 StringList lines = GetInputAsStringList();
|
|
|
805 lines.AppendString("");
|
|
|
806 indentation = m_fix_indentation_callback(
|
|
|
807 this, lines, 0, m_fix_indentation_callback_baton);
|
|
|
808 }
|
|
|
809 m_input_lines.insert(
|
|
|
810 m_input_lines.end(),
|
|
|
811 EditLineStringType(indentation, EditLineCharType(' ')));
|
|
|
812 }
|
|
|
813
|
|
|
814 // Move down past the current line using newlines to force scrolling if
|
|
|
815 // needed
|
|
|
816 SetCurrentLine(m_current_line_index + 1);
|
|
|
817 const LineInfoW *info = el_wline(m_editline);
|
|
|
818 int cursor_position = (int)((info->cursor - info->buffer) + GetPromptWidth());
|
|
|
819 int cursor_row = cursor_position / m_terminal_width;
|
|
|
820 for (int line_count = 0; line_count < m_current_line_rows - cursor_row;
|
|
|
821 line_count++) {
|
|
|
822 fprintf(m_output_file, "\n");
|
|
|
823 }
|
|
|
824 return CC_NEWLINE;
|
|
|
825 }
|
|
|
826
|
|
|
827 unsigned char Editline::PreviousHistoryCommand(int ch) {
|
|
|
828 SaveEditedLine();
|
|
|
829
|
|
|
830 return RecallHistory(HistoryOperation::Older);
|
|
|
831 }
|
|
|
832
|
|
|
833 unsigned char Editline::NextHistoryCommand(int ch) {
|
|
|
834 SaveEditedLine();
|
|
|
835
|
|
|
836 return RecallHistory(HistoryOperation::Newer);
|
|
|
837 }
|
|
|
838
|
|
|
839 unsigned char Editline::FixIndentationCommand(int ch) {
|
|
|
840 if (!m_fix_indentation_callback)
|
|
|
841 return CC_NORM;
|
|
|
842
|
|
|
843 // Insert the character typed before proceeding
|
|
|
844 EditLineCharType inserted[] = {(EditLineCharType)ch, 0};
|
|
|
845 el_winsertstr(m_editline, inserted);
|
|
|
846 LineInfoW *info = const_cast<LineInfoW *>(el_wline(m_editline));
|
|
|
847 int cursor_position = info->cursor - info->buffer;
|
|
|
848
|
|
|
849 // Save the edits and determine the correct indentation level
|
|
|
850 SaveEditedLine();
|
|
|
851 StringList lines = GetInputAsStringList(m_current_line_index + 1);
|
|
|
852 int indent_correction = m_fix_indentation_callback(
|
|
|
853 this, lines, cursor_position, m_fix_indentation_callback_baton);
|
|
|
854
|
|
|
855 // If it is already correct no special work is needed
|
|
|
856 if (indent_correction == 0)
|
|
|
857 return CC_REFRESH;
|
|
|
858
|
|
|
859 // Change the indentation level of the line
|
|
|
860 std::string currentLine = lines.GetStringAtIndex(m_current_line_index);
|
|
|
861 if (indent_correction > 0) {
|
|
|
862 currentLine = currentLine.insert(0, indent_correction, ' ');
|
|
|
863 } else {
|
|
|
864 currentLine = currentLine.erase(0, -indent_correction);
|
|
|
865 }
|
|
|
866 #if LLDB_EDITLINE_USE_WCHAR
|
|
|
867 m_input_lines[m_current_line_index] = m_utf8conv.from_bytes(currentLine);
|
|
|
868 #else
|
|
|
869 m_input_lines[m_current_line_index] = currentLine;
|
|
|
870 #endif
|
|
|
871
|
|
|
872 // Update the display to reflect the change
|
|
|
873 MoveCursor(CursorLocation::EditingCursor, CursorLocation::EditingPrompt);
|
|
|
874 DisplayInput(m_current_line_index);
|
|
|
875
|
|
|
876 // Reposition the cursor back on the original line and prepare to restart
|
|
|
877 // editing with a new cursor position
|
|
|
878 SetCurrentLine(m_current_line_index);
|
|
|
879 MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingPrompt);
|
|
|
880 m_revert_cursor_index = cursor_position + indent_correction;
|
|
|
881 return CC_NEWLINE;
|
|
|
882 }
|
|
|
883
|
|
|
884 unsigned char Editline::RevertLineCommand(int ch) {
|
|
|
885 el_winsertstr(m_editline, m_input_lines[m_current_line_index].c_str());
|
|
|
886 if (m_revert_cursor_index >= 0) {
|
|
|
887 LineInfoW *info = const_cast<LineInfoW *>(el_wline(m_editline));
|
|
|
888 info->cursor = info->buffer + m_revert_cursor_index;
|
|
|
889 if (info->cursor > info->lastchar) {
|
|
|
890 info->cursor = info->lastchar;
|
|
|
891 }
|
|
|
892 m_revert_cursor_index = -1;
|
|
|
893 }
|
|
|
894 return CC_REFRESH;
|
|
|
895 }
|
|
|
896
|
|
|
897 unsigned char Editline::BufferStartCommand(int ch) {
|
|
|
898 SaveEditedLine();
|
|
|
899 MoveCursor(CursorLocation::EditingCursor, CursorLocation::BlockStart);
|
|
|
900 SetCurrentLine(0);
|
|
|
901 m_revert_cursor_index = 0;
|
|
|
902 return CC_NEWLINE;
|
|
|
903 }
|
|
|
904
|
|
|
905 unsigned char Editline::BufferEndCommand(int ch) {
|
|
|
906 SaveEditedLine();
|
|
|
907 MoveCursor(CursorLocation::EditingCursor, CursorLocation::BlockEnd);
|
|
|
908 SetCurrentLine((int)m_input_lines.size() - 1);
|
|
|
909 MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingPrompt);
|
|
|
910 return CC_NEWLINE;
|
|
|
911 }
|
|
|
912
|
|
|
913 /// Prints completions and their descriptions to the given file. Only the
|
|
|
914 /// completions in the interval [start, end) are printed.
|
|
|
915 static void
|
|
|
916 PrintCompletion(FILE *output_file,
|
|
|
917 llvm::ArrayRef<CompletionResult::Completion> results,
|
|
|
918 size_t max_len) {
|
|
|
919 for (const CompletionResult::Completion &c : results) {
|
|
|
920 fprintf(output_file, "\t%-*s", (int)max_len, c.GetCompletion().c_str());
|
|
|
921 if (!c.GetDescription().empty())
|
|
|
922 fprintf(output_file, " -- %s", c.GetDescription().c_str());
|
|
|
923 fprintf(output_file, "\n");
|
|
|
924 }
|
|
|
925 }
|
|
|
926
|
|
|
927 static void
|
|
|
928 DisplayCompletions(::EditLine *editline, FILE *output_file,
|
|
|
929 llvm::ArrayRef<CompletionResult::Completion> results) {
|
|
|
930 assert(!results.empty());
|
|
|
931
|
|
|
932 fprintf(output_file, "\n" ANSI_CLEAR_BELOW "Available completions:\n");
|
|
|
933 const size_t page_size = 40;
|
|
|
934 bool all = false;
|
|
|
935
|
|
|
936 auto longest =
|
|
|
937 std::max_element(results.begin(), results.end(), [](auto &c1, auto &c2) {
|
|
|
938 return c1.GetCompletion().size() < c2.GetCompletion().size();
|
|
|
939 });
|
|
|
940
|
|
|
941 const size_t max_len = longest->GetCompletion().size();
|
|
|
942
|
|
|
943 if (results.size() < page_size) {
|
|
|
944 PrintCompletion(output_file, results, max_len);
|
|
|
945 return;
|
|
|
946 }
|
|
|
947
|
|
|
948 size_t cur_pos = 0;
|
|
|
949 while (cur_pos < results.size()) {
|
|
|
950 size_t remaining = results.size() - cur_pos;
|
|
|
951 size_t next_size = all ? remaining : std::min(page_size, remaining);
|
|
|
952
|
|
|
953 PrintCompletion(output_file, results.slice(cur_pos, next_size), max_len);
|
|
|
954
|
|
|
955 cur_pos += next_size;
|
|
|
956
|
|
|
957 if (cur_pos >= results.size())
|
|
|
958 break;
|
|
|
959
|
|
|
960 fprintf(output_file, "More (Y/n/a): ");
|
|
|
961 char reply = 'n';
|
|
|
962 int got_char = el_getc(editline, &reply);
|
|
|
963 fprintf(output_file, "\n");
|
|
|
964 if (got_char == -1 || reply == 'n')
|
|
|
965 break;
|
|
|
966 if (reply == 'a')
|
|
|
967 all = true;
|
|
|
968 }
|
|
|
969 }
|
|
|
970
|
|
|
971 unsigned char Editline::TabCommand(int ch) {
|
|
|
972 if (m_completion_callback == nullptr)
|
|
|
973 return CC_ERROR;
|
|
|
974
|
|
|
975 const LineInfo *line_info = el_line(m_editline);
|
|
|
976
|
|
|
977 llvm::StringRef line(line_info->buffer,
|
|
|
978 line_info->lastchar - line_info->buffer);
|
|
|
979 unsigned cursor_index = line_info->cursor - line_info->buffer;
|
|
|
980 CompletionResult result;
|
|
|
981 CompletionRequest request(line, cursor_index, result);
|
|
|
982
|
|
|
983 m_completion_callback(request, m_completion_callback_baton);
|
|
|
984
|
|
|
985 llvm::ArrayRef<CompletionResult::Completion> results = result.GetResults();
|
|
|
986
|
|
|
987 StringList completions;
|
|
|
988 result.GetMatches(completions);
|
|
|
989
|
|
|
990 if (results.size() == 0)
|
|
|
991 return CC_ERROR;
|
|
|
992
|
|
|
993 if (results.size() == 1) {
|
|
|
994 CompletionResult::Completion completion = results.front();
|
|
|
995 switch (completion.GetMode()) {
|
|
|
996 case CompletionMode::Normal: {
|
|
|
997 std::string to_add = completion.GetCompletion();
|
|
|
998 to_add = to_add.substr(request.GetCursorArgumentPrefix().size());
|
|
|
999 if (request.GetParsedArg().IsQuoted())
|
|
|
1000 to_add.push_back(request.GetParsedArg().GetQuoteChar());
|
|
|
1001 to_add.push_back(' ');
|
|
|
1002 el_insertstr(m_editline, to_add.c_str());
|
|
|
1003 break;
|
|
|
1004 }
|
|
|
1005 case CompletionMode::Partial: {
|
|
|
1006 std::string to_add = completion.GetCompletion();
|
|
|
1007 to_add = to_add.substr(request.GetCursorArgumentPrefix().size());
|
|
|
1008 el_insertstr(m_editline, to_add.c_str());
|
|
|
1009 break;
|
|
|
1010 }
|
|
|
1011 case CompletionMode::RewriteLine: {
|
|
|
1012 el_deletestr(m_editline, line_info->cursor - line_info->buffer);
|
|
|
1013 el_insertstr(m_editline, completion.GetCompletion().c_str());
|
|
|
1014 break;
|
|
|
1015 }
|
|
|
1016 }
|
|
|
1017 return CC_REDISPLAY;
|
|
|
1018 }
|
|
|
1019
|
|
|
1020 // If we get a longer match display that first.
|
|
|
1021 std::string longest_prefix = completions.LongestCommonPrefix();
|
|
|
1022 if (!longest_prefix.empty())
|
|
|
1023 longest_prefix =
|
|
|
1024 longest_prefix.substr(request.GetCursorArgumentPrefix().size());
|
|
|
1025 if (!longest_prefix.empty()) {
|
|
|
1026 el_insertstr(m_editline, longest_prefix.c_str());
|
|
|
1027 return CC_REDISPLAY;
|
|
|
1028 }
|
|
|
1029
|
|
|
1030 DisplayCompletions(m_editline, m_output_file, results);
|
|
|
1031
|
|
|
1032 DisplayInput();
|
|
|
1033 MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingCursor);
|
|
|
1034 return CC_REDISPLAY;
|
|
|
1035 }
|
|
|
1036
|
|
|
1037 void Editline::ConfigureEditor(bool multiline) {
|
|
|
1038 if (m_editline && m_multiline_enabled == multiline)
|
|
|
1039 return;
|
|
|
1040 m_multiline_enabled = multiline;
|
|
|
1041
|
|
|
1042 if (m_editline) {
|
|
|
1043 // Disable edit mode to stop the terminal from flushing all input during
|
|
|
1044 // the call to el_end() since we expect to have multiple editline instances
|
|
|
1045 // in this program.
|
|
|
1046 el_set(m_editline, EL_EDITMODE, 0);
|
|
|
1047 el_end(m_editline);
|
|
|
1048 }
|
|
|
1049
|
|
|
1050 m_editline =
|
|
|
1051 el_init(m_editor_name.c_str(), m_input_file, m_output_file, m_error_file);
|
|
|
1052 TerminalSizeChanged();
|
|
|
1053
|
|
|
1054 if (m_history_sp && m_history_sp->IsValid()) {
|
|
|
1055 if (!m_history_sp->Load()) {
|
|
|
1056 fputs("Could not load history file\n.", m_output_file);
|
|
|
1057 }
|
|
|
1058 el_wset(m_editline, EL_HIST, history, m_history_sp->GetHistoryPtr());
|
|
|
1059 }
|
|
|
1060 el_set(m_editline, EL_CLIENTDATA, this);
|
|
|
1061 el_set(m_editline, EL_SIGNAL, 0);
|
|
|
1062 el_set(m_editline, EL_EDITOR, "emacs");
|
|
|
1063 el_set(m_editline, EL_PROMPT,
|
|
|
1064 (EditlinePromptCallbackType)([](EditLine *editline) {
|
|
|
1065 return Editline::InstanceFor(editline)->Prompt();
|
|
|
1066 }));
|
|
|
1067
|
|
|
1068 el_wset(m_editline, EL_GETCFN, (EditlineGetCharCallbackType)([](
|
|
|
1069 EditLine *editline, EditLineGetCharType *c) {
|
|
|
1070 return Editline::InstanceFor(editline)->GetCharacter(c);
|
|
|
1071 }));
|
|
|
1072
|
|
|
1073 // Commands used for multiline support, registered whether or not they're
|
|
|
1074 // used
|
|
|
1075 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-break-line"),
|
|
|
1076 EditLineConstString("Insert a line break"),
|
|
|
1077 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1078 return Editline::InstanceFor(editline)->BreakLineCommand(ch);
|
|
|
1079 }));
|
|
|
1080 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-end-or-add-line"),
|
|
|
1081 EditLineConstString("End editing or continue when incomplete"),
|
|
|
1082 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1083 return Editline::InstanceFor(editline)->EndOrAddLineCommand(ch);
|
|
|
1084 }));
|
|
|
1085 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-delete-next-char"),
|
|
|
1086 EditLineConstString("Delete next character"),
|
|
|
1087 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1088 return Editline::InstanceFor(editline)->DeleteNextCharCommand(ch);
|
|
|
1089 }));
|
|
|
1090 el_wset(
|
|
|
1091 m_editline, EL_ADDFN, EditLineConstString("lldb-delete-previous-char"),
|
|
|
1092 EditLineConstString("Delete previous character"),
|
|
|
1093 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1094 return Editline::InstanceFor(editline)->DeletePreviousCharCommand(ch);
|
|
|
1095 }));
|
|
|
1096 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-previous-line"),
|
|
|
1097 EditLineConstString("Move to previous line"),
|
|
|
1098 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1099 return Editline::InstanceFor(editline)->PreviousLineCommand(ch);
|
|
|
1100 }));
|
|
|
1101 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-next-line"),
|
|
|
1102 EditLineConstString("Move to next line"),
|
|
|
1103 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1104 return Editline::InstanceFor(editline)->NextLineCommand(ch);
|
|
|
1105 }));
|
|
|
1106 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-previous-history"),
|
|
|
1107 EditLineConstString("Move to previous history"),
|
|
|
1108 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1109 return Editline::InstanceFor(editline)->PreviousHistoryCommand(ch);
|
|
|
1110 }));
|
|
|
1111 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-next-history"),
|
|
|
1112 EditLineConstString("Move to next history"),
|
|
|
1113 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1114 return Editline::InstanceFor(editline)->NextHistoryCommand(ch);
|
|
|
1115 }));
|
|
|
1116 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-buffer-start"),
|
|
|
1117 EditLineConstString("Move to start of buffer"),
|
|
|
1118 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1119 return Editline::InstanceFor(editline)->BufferStartCommand(ch);
|
|
|
1120 }));
|
|
|
1121 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-buffer-end"),
|
|
|
1122 EditLineConstString("Move to end of buffer"),
|
|
|
1123 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1124 return Editline::InstanceFor(editline)->BufferEndCommand(ch);
|
|
|
1125 }));
|
|
|
1126 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-fix-indentation"),
|
|
|
1127 EditLineConstString("Fix line indentation"),
|
|
|
1128 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1129 return Editline::InstanceFor(editline)->FixIndentationCommand(ch);
|
|
|
1130 }));
|
|
|
1131
|
|
|
1132 // Register the complete callback under two names for compatibility with
|
|
|
1133 // older clients using custom .editrc files (largely because libedit has a
|
|
|
1134 // bad bug where if you have a bind command that tries to bind to a function
|
|
|
1135 // name that doesn't exist, it can corrupt the heap and crash your process
|
|
|
1136 // later.)
|
|
|
1137 EditlineCommandCallbackType complete_callback = [](EditLine *editline,
|
|
|
1138 int ch) {
|
|
|
1139 return Editline::InstanceFor(editline)->TabCommand(ch);
|
|
|
1140 };
|
|
|
1141 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-complete"),
|
|
|
1142 EditLineConstString("Invoke completion"), complete_callback);
|
|
|
1143 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb_complete"),
|
|
|
1144 EditLineConstString("Invoke completion"), complete_callback);
|
|
|
1145
|
|
|
1146 // General bindings we don't mind being overridden
|
|
|
1147 if (!multiline) {
|
|
|
1148 el_set(m_editline, EL_BIND, "^r", "em-inc-search-prev",
|
|
|
1149 NULL); // Cycle through backwards search, entering string
|
|
|
1150 }
|
|
|
1151 el_set(m_editline, EL_BIND, "^w", "ed-delete-prev-word",
|
|
|
1152 NULL); // Delete previous word, behave like bash in emacs mode
|
|
|
1153 el_set(m_editline, EL_BIND, "\t", "lldb-complete",
|
|
|
1154 NULL); // Bind TAB to auto complete
|
|
|
1155
|
|
|
1156 // Allow ctrl-left-arrow and ctrl-right-arrow for navigation, behave like
|
|
|
1157 // bash in emacs mode.
|
|
|
1158 el_set(m_editline, EL_BIND, ESCAPE "[1;5C", "em-next-word", NULL);
|
|
|
1159 el_set(m_editline, EL_BIND, ESCAPE "[1;5D", "ed-prev-word", NULL);
|
|
|
1160 el_set(m_editline, EL_BIND, ESCAPE "[5C", "em-next-word", NULL);
|
|
|
1161 el_set(m_editline, EL_BIND, ESCAPE "[5D", "ed-prev-word", NULL);
|
|
|
1162 el_set(m_editline, EL_BIND, ESCAPE ESCAPE "[C", "em-next-word", NULL);
|
|
|
1163 el_set(m_editline, EL_BIND, ESCAPE ESCAPE "[D", "ed-prev-word", NULL);
|
|
|
1164
|
|
|
1165 // Allow user-specific customization prior to registering bindings we
|
|
|
1166 // absolutely require
|
|
|
1167 el_source(m_editline, nullptr);
|
|
|
1168
|
|
|
1169 // Register an internal binding that external developers shouldn't use
|
|
|
1170 el_wset(m_editline, EL_ADDFN, EditLineConstString("lldb-revert-line"),
|
|
|
1171 EditLineConstString("Revert line to saved state"),
|
|
|
1172 (EditlineCommandCallbackType)([](EditLine *editline, int ch) {
|
|
|
1173 return Editline::InstanceFor(editline)->RevertLineCommand(ch);
|
|
|
1174 }));
|
|
|
1175
|
|
|
1176 // Register keys that perform auto-indent correction
|
|
|
1177 if (m_fix_indentation_callback && m_fix_indentation_callback_chars) {
|
|
|
1178 char bind_key[2] = {0, 0};
|
|
|
1179 const char *indent_chars = m_fix_indentation_callback_chars;
|
|
|
1180 while (*indent_chars) {
|
|
|
1181 bind_key[0] = *indent_chars;
|
|
|
1182 el_set(m_editline, EL_BIND, bind_key, "lldb-fix-indentation", NULL);
|
|
|
1183 ++indent_chars;
|
|
|
1184 }
|
|
|
1185 }
|
|
|
1186
|
|
|
1187 // Multi-line editor bindings
|
|
|
1188 if (multiline) {
|
|
|
1189 el_set(m_editline, EL_BIND, "\n", "lldb-end-or-add-line", NULL);
|
|
|
1190 el_set(m_editline, EL_BIND, "\r", "lldb-end-or-add-line", NULL);
|
|
|
1191 el_set(m_editline, EL_BIND, ESCAPE "\n", "lldb-break-line", NULL);
|
|
|
1192 el_set(m_editline, EL_BIND, ESCAPE "\r", "lldb-break-line", NULL);
|
|
|
1193 el_set(m_editline, EL_BIND, "^p", "lldb-previous-line", NULL);
|
|
|
1194 el_set(m_editline, EL_BIND, "^n", "lldb-next-line", NULL);
|
|
|
1195 el_set(m_editline, EL_BIND, "^?", "lldb-delete-previous-char", NULL);
|
|
|
1196 el_set(m_editline, EL_BIND, "^d", "lldb-delete-next-char", NULL);
|
|
|
1197 el_set(m_editline, EL_BIND, ESCAPE "[3~", "lldb-delete-next-char", NULL);
|
|
|
1198 el_set(m_editline, EL_BIND, ESCAPE "[\\^", "lldb-revert-line", NULL);
|
|
|
1199
|
|
|
1200 // Editor-specific bindings
|
|
|
1201 if (IsEmacs()) {
|
|
|
1202 el_set(m_editline, EL_BIND, ESCAPE "<", "lldb-buffer-start", NULL);
|
|
|
1203 el_set(m_editline, EL_BIND, ESCAPE ">", "lldb-buffer-end", NULL);
|
|
|
1204 el_set(m_editline, EL_BIND, ESCAPE "[A", "lldb-previous-line", NULL);
|
|
|
1205 el_set(m_editline, EL_BIND, ESCAPE "[B", "lldb-next-line", NULL);
|
|
|
1206 el_set(m_editline, EL_BIND, ESCAPE ESCAPE "[A", "lldb-previous-history",
|
|
|
1207 NULL);
|
|
|
1208 el_set(m_editline, EL_BIND, ESCAPE ESCAPE "[B", "lldb-next-history",
|
|
|
1209 NULL);
|
|
|
1210 el_set(m_editline, EL_BIND, ESCAPE "[1;3A", "lldb-previous-history",
|
|
|
1211 NULL);
|
|
|
1212 el_set(m_editline, EL_BIND, ESCAPE "[1;3B", "lldb-next-history", NULL);
|
|
|
1213 } else {
|
|
|
1214 el_set(m_editline, EL_BIND, "^H", "lldb-delete-previous-char", NULL);
|
|
|
1215
|
|
|
1216 el_set(m_editline, EL_BIND, "-a", ESCAPE "[A", "lldb-previous-line",
|
|
|
1217 NULL);
|
|
|
1218 el_set(m_editline, EL_BIND, "-a", ESCAPE "[B", "lldb-next-line", NULL);
|
|
|
1219 el_set(m_editline, EL_BIND, "-a", "x", "lldb-delete-next-char", NULL);
|
|
|
1220 el_set(m_editline, EL_BIND, "-a", "^H", "lldb-delete-previous-char",
|
|
|
1221 NULL);
|
|
|
1222 el_set(m_editline, EL_BIND, "-a", "^?", "lldb-delete-previous-char",
|
|
|
1223 NULL);
|
|
|
1224
|
|
|
1225 // Escape is absorbed exiting edit mode, so re-register important
|
|
|
1226 // sequences without the prefix
|
|
|
1227 el_set(m_editline, EL_BIND, "-a", "[A", "lldb-previous-line", NULL);
|
|
|
1228 el_set(m_editline, EL_BIND, "-a", "[B", "lldb-next-line", NULL);
|
|
|
1229 el_set(m_editline, EL_BIND, "-a", "[\\^", "lldb-revert-line", NULL);
|
|
|
1230 }
|
|
|
1231 }
|
|
|
1232 }
|
|
|
1233
|
|
|
1234 // Editline public methods
|
|
|
1235
|
|
|
1236 Editline *Editline::InstanceFor(EditLine *editline) {
|
|
|
1237 Editline *editor;
|
|
|
1238 el_get(editline, EL_CLIENTDATA, &editor);
|
|
|
1239 return editor;
|
|
|
1240 }
|
|
|
1241
|
|
|
1242 Editline::Editline(const char *editline_name, FILE *input_file,
|
|
|
1243 FILE *output_file, FILE *error_file, bool color_prompts)
|
|
|
1244 : m_editor_status(EditorStatus::Complete), m_color_prompts(color_prompts),
|
|
|
1245 m_input_file(input_file), m_output_file(output_file),
|
|
|
1246 m_error_file(error_file), m_input_connection(fileno(input_file), false) {
|
|
|
1247 // Get a shared history instance
|
|
|
1248 m_editor_name = (editline_name == nullptr) ? "lldb-tmp" : editline_name;
|
|
|
1249 m_history_sp = EditlineHistory::GetHistory(m_editor_name);
|
|
|
1250
|
|
|
1251 #ifdef USE_SETUPTERM_WORKAROUND
|
|
|
1252 if (m_output_file) {
|
|
|
1253 const int term_fd = fileno(m_output_file);
|
|
|
1254 if (term_fd != -1) {
|
|
|
1255 static std::mutex *g_init_terminal_fds_mutex_ptr = nullptr;
|
|
|
1256 static std::set<int> *g_init_terminal_fds_ptr = nullptr;
|
|
|
1257 static llvm::once_flag g_once_flag;
|
|
|
1258 llvm::call_once(g_once_flag, [&]() {
|
|
|
1259 g_init_terminal_fds_mutex_ptr =
|
|
|
1260 new std::mutex(); // NOTE: Leak to avoid C++ destructor chain issues
|
|
|
1261 g_init_terminal_fds_ptr = new std::set<int>(); // NOTE: Leak to avoid
|
|
|
1262 // C++ destructor chain
|
|
|
1263 // issues
|
|
|
1264 });
|
|
|
1265
|
|
|
1266 // We must make sure to initialize the terminal a given file descriptor
|
|
|
1267 // only once. If we do this multiple times, we start leaking memory.
|
|
|
1268 std::lock_guard<std::mutex> guard(*g_init_terminal_fds_mutex_ptr);
|
|
|
1269 if (g_init_terminal_fds_ptr->find(term_fd) ==
|
|
|
1270 g_init_terminal_fds_ptr->end()) {
|
|
|
1271 g_init_terminal_fds_ptr->insert(term_fd);
|
|
|
1272 setupterm((char *)0, term_fd, (int *)0);
|
|
|
1273 }
|
|
|
1274 }
|
|
|
1275 }
|
|
|
1276 #endif
|
|
|
1277 }
|
|
|
1278
|
|
|
1279 Editline::~Editline() {
|
|
|
1280 if (m_editline) {
|
|
|
1281 // Disable edit mode to stop the terminal from flushing all input during
|
|
|
1282 // the call to el_end() since we expect to have multiple editline instances
|
|
|
1283 // in this program.
|
|
|
1284 el_set(m_editline, EL_EDITMODE, 0);
|
|
|
1285 el_end(m_editline);
|
|
|
1286 m_editline = nullptr;
|
|
|
1287 }
|
|
|
1288
|
|
|
1289 // EditlineHistory objects are sometimes shared between multiple Editline
|
|
|
1290 // instances with the same program name. So just release our shared pointer
|
|
|
1291 // and if we are the last owner, it will save the history to the history save
|
|
|
1292 // file automatically.
|
|
|
1293 m_history_sp.reset();
|
|
|
1294 }
|
|
|
1295
|
|
|
1296 void Editline::SetPrompt(const char *prompt) {
|
|
|
1297 m_set_prompt = prompt == nullptr ? "" : prompt;
|
|
|
1298 }
|
|
|
1299
|
|
|
1300 void Editline::SetContinuationPrompt(const char *continuation_prompt) {
|
|
|
1301 m_set_continuation_prompt =
|
|
|
1302 continuation_prompt == nullptr ? "" : continuation_prompt;
|
|
|
1303 }
|
|
|
1304
|
|
|
1305 void Editline::TerminalSizeChanged() {
|
|
|
1306 if (m_editline != nullptr) {
|
|
|
1307 el_resize(m_editline);
|
|
|
1308 int columns;
|
|
|
1309 // This function is documenting as taking (const char *, void *) for the
|
|
|
1310 // vararg part, but in reality in was consuming arguments until the first
|
|
|
1311 // null pointer. This was fixed in libedit in April 2019
|
|
|
1312 // <http://mail-index.netbsd.org/source-changes/2019/04/26/msg105454.html>,
|
|
|
1313 // but we're keeping the workaround until a version with that fix is more
|
|
|
1314 // widely available.
|
|
|
1315 if (el_get(m_editline, EL_GETTC, "co", &columns, nullptr) == 0) {
|
|
|
1316 m_terminal_width = columns;
|
|
|
1317 if (m_current_line_rows != -1) {
|
|
|
1318 const LineInfoW *info = el_wline(m_editline);
|
|
|
1319 int lineLength =
|
|
|
1320 (int)((info->lastchar - info->buffer) + GetPromptWidth());
|
|
|
1321 m_current_line_rows = (lineLength / columns) + 1;
|
|
|
1322 }
|
|
|
1323 } else {
|
|
|
1324 m_terminal_width = INT_MAX;
|
|
|
1325 m_current_line_rows = 1;
|
|
|
1326 }
|
|
|
1327 }
|
|
|
1328 }
|
|
|
1329
|
|
|
1330 const char *Editline::GetPrompt() { return m_set_prompt.c_str(); }
|
|
|
1331
|
|
|
1332 uint32_t Editline::GetCurrentLine() { return m_current_line_index; }
|
|
|
1333
|
|
|
1334 bool Editline::Interrupt() {
|
|
|
1335 bool result = true;
|
|
|
1336 std::lock_guard<std::mutex> guard(m_output_mutex);
|
|
|
1337 if (m_editor_status == EditorStatus::Editing) {
|
|
|
1338 fprintf(m_output_file, "^C\n");
|
|
|
1339 result = m_input_connection.InterruptRead();
|
|
|
1340 }
|
|
|
1341 m_editor_status = EditorStatus::Interrupted;
|
|
|
1342 return result;
|
|
|
1343 }
|
|
|
1344
|
|
|
1345 bool Editline::Cancel() {
|
|
|
1346 bool result = true;
|
|
|
1347 std::lock_guard<std::mutex> guard(m_output_mutex);
|
|
|
1348 if (m_editor_status == EditorStatus::Editing) {
|
|
|
1349 MoveCursor(CursorLocation::EditingCursor, CursorLocation::BlockStart);
|
|
|
1350 fprintf(m_output_file, ANSI_CLEAR_BELOW);
|
|
|
1351 result = m_input_connection.InterruptRead();
|
|
|
1352 }
|
|
|
1353 m_editor_status = EditorStatus::Interrupted;
|
|
|
1354 return result;
|
|
|
1355 }
|
|
|
1356
|
|
|
1357 void Editline::SetAutoCompleteCallback(CompleteCallbackType callback,
|
|
|
1358 void *baton) {
|
|
|
1359 m_completion_callback = callback;
|
|
|
1360 m_completion_callback_baton = baton;
|
|
|
1361 }
|
|
|
1362
|
|
|
1363 void Editline::SetIsInputCompleteCallback(IsInputCompleteCallbackType callback,
|
|
|
1364 void *baton) {
|
|
|
1365 m_is_input_complete_callback = callback;
|
|
|
1366 m_is_input_complete_callback_baton = baton;
|
|
|
1367 }
|
|
|
1368
|
|
|
1369 bool Editline::SetFixIndentationCallback(FixIndentationCallbackType callback,
|
|
|
1370 void *baton,
|
|
|
1371 const char *indent_chars) {
|
|
|
1372 m_fix_indentation_callback = callback;
|
|
|
1373 m_fix_indentation_callback_baton = baton;
|
|
|
1374 m_fix_indentation_callback_chars = indent_chars;
|
|
|
1375 return false;
|
|
|
1376 }
|
|
|
1377
|
|
|
1378 bool Editline::GetLine(std::string &line, bool &interrupted) {
|
|
|
1379 ConfigureEditor(false);
|
|
|
1380 m_input_lines = std::vector<EditLineStringType>();
|
|
|
1381 m_input_lines.insert(m_input_lines.begin(), EditLineConstString(""));
|
|
|
1382
|
|
|
1383 std::lock_guard<std::mutex> guard(m_output_mutex);
|
|
|
1384
|
|
|
1385 lldbassert(m_editor_status != EditorStatus::Editing);
|
|
|
1386 if (m_editor_status == EditorStatus::Interrupted) {
|
|
|
1387 m_editor_status = EditorStatus::Complete;
|
|
|
1388 interrupted = true;
|
|
|
1389 return true;
|
|
|
1390 }
|
|
|
1391
|
|
|
1392 SetCurrentLine(0);
|
|
|
1393 m_in_history = false;
|
|
|
1394 m_editor_status = EditorStatus::Editing;
|
|
|
1395 m_revert_cursor_index = -1;
|
|
|
1396
|
|
|
1397 int count;
|
|
|
1398 auto input = el_wgets(m_editline, &count);
|
|
|
1399
|
|
|
1400 interrupted = m_editor_status == EditorStatus::Interrupted;
|
|
|
1401 if (!interrupted) {
|
|
|
1402 if (input == nullptr) {
|
|
|
1403 fprintf(m_output_file, "\n");
|
|
|
1404 m_editor_status = EditorStatus::EndOfInput;
|
|
|
1405 } else {
|
|
|
1406 m_history_sp->Enter(input);
|
|
|
1407 #if LLDB_EDITLINE_USE_WCHAR
|
|
|
1408 line = m_utf8conv.to_bytes(SplitLines(input)[0]);
|
|
|
1409 #else
|
|
|
1410 line = SplitLines(input)[0];
|
|
|
1411 #endif
|
|
|
1412 m_editor_status = EditorStatus::Complete;
|
|
|
1413 }
|
|
|
1414 }
|
|
|
1415 return m_editor_status != EditorStatus::EndOfInput;
|
|
|
1416 }
|
|
|
1417
|
|
|
1418 bool Editline::GetLines(int first_line_number, StringList &lines,
|
|
|
1419 bool &interrupted) {
|
|
|
1420 ConfigureEditor(true);
|
|
|
1421
|
|
|
1422 // Print the initial input lines, then move the cursor back up to the start
|
|
|
1423 // of input
|
|
|
1424 SetBaseLineNumber(first_line_number);
|
|
|
1425 m_input_lines = std::vector<EditLineStringType>();
|
|
|
1426 m_input_lines.insert(m_input_lines.begin(), EditLineConstString(""));
|
|
|
1427
|
|
|
1428 std::lock_guard<std::mutex> guard(m_output_mutex);
|
|
|
1429 // Begin the line editing loop
|
|
|
1430 DisplayInput();
|
|
|
1431 SetCurrentLine(0);
|
|
|
1432 MoveCursor(CursorLocation::BlockEnd, CursorLocation::BlockStart);
|
|
|
1433 m_editor_status = EditorStatus::Editing;
|
|
|
1434 m_in_history = false;
|
|
|
1435
|
|
|
1436 m_revert_cursor_index = -1;
|
|
|
1437 while (m_editor_status == EditorStatus::Editing) {
|
|
|
1438 int count;
|
|
|
1439 m_current_line_rows = -1;
|
|
|
1440 el_wpush(m_editline, EditLineConstString(
|
|
|
1441 "\x1b[^")); // Revert to the existing line content
|
|
|
1442 el_wgets(m_editline, &count);
|
|
|
1443 }
|
|
|
1444
|
|
|
1445 interrupted = m_editor_status == EditorStatus::Interrupted;
|
|
|
1446 if (!interrupted) {
|
|
|
1447 // Save the completed entry in history before returning
|
|
|
1448 m_history_sp->Enter(CombineLines(m_input_lines).c_str());
|
|
|
1449
|
|
|
1450 lines = GetInputAsStringList();
|
|
|
1451 }
|
|
|
1452 return m_editor_status != EditorStatus::EndOfInput;
|
|
|
1453 }
|
|
|
1454
|
|
|
1455 void Editline::PrintAsync(Stream *stream, const char *s, size_t len) {
|
|
|
1456 std::lock_guard<std::mutex> guard(m_output_mutex);
|
|
|
1457 if (m_editor_status == EditorStatus::Editing) {
|
|
|
1458 MoveCursor(CursorLocation::EditingCursor, CursorLocation::BlockStart);
|
|
|
1459 fprintf(m_output_file, ANSI_CLEAR_BELOW);
|
|
|
1460 }
|
|
|
1461 stream->Write(s, len);
|
|
|
1462 stream->Flush();
|
|
|
1463 if (m_editor_status == EditorStatus::Editing) {
|
|
|
1464 DisplayInput();
|
|
|
1465 MoveCursor(CursorLocation::BlockEnd, CursorLocation::EditingCursor);
|
|
|
1466 }
|
|
|
1467 }
|
|
|
1468
|
|
|
1469 bool Editline::CompleteCharacter(char ch, EditLineGetCharType &out) {
|
|
|
1470 #if !LLDB_EDITLINE_USE_WCHAR
|
|
|
1471 if (ch == (char)EOF)
|
|
|
1472 return false;
|
|
|
1473
|
|
|
1474 out = (unsigned char)ch;
|
|
|
1475 return true;
|
|
|
1476 #else
|
|
|
1477 std::codecvt_utf8<wchar_t> cvt;
|
|
|
1478 llvm::SmallString<4> input;
|
|
|
1479 for (;;) {
|
|
|
1480 const char *from_next;
|
|
|
1481 wchar_t *to_next;
|
|
|
1482 std::mbstate_t state = std::mbstate_t();
|
|
|
1483 input.push_back(ch);
|
|
|
1484 switch (cvt.in(state, input.begin(), input.end(), from_next, &out, &out + 1,
|
|
|
1485 to_next)) {
|
|
|
1486 case std::codecvt_base::ok:
|
|
|
1487 return out != (int)WEOF;
|
|
|
1488
|
|
|
1489 case std::codecvt_base::error:
|
|
|
1490 case std::codecvt_base::noconv:
|
|
|
1491 return false;
|
|
|
1492
|
|
|
1493 case std::codecvt_base::partial:
|
|
|
1494 lldb::ConnectionStatus status;
|
|
|
1495 size_t read_count = m_input_connection.Read(
|
|
|
1496 &ch, 1, std::chrono::seconds(0), status, nullptr);
|
|
|
1497 if (read_count == 0)
|
|
|
1498 return false;
|
|
|
1499 break;
|
|
|
1500 }
|
|
|
1501 }
|
|
|
1502 #endif
|
|
|
1503 }
|
