Mercurial > octave
annotate libinterp/corefcn/input.cc @ 28851:1ac5a76ae91d
use [=] capture default specification where possible
Files affected: Canvas.cc, GLCanvas.cc, file-editor-tab.cc,
file-editor.cc, octave-qscintilla.cc, main-window.cc,
octave-qobject.cc, set-path-model.cc, variable-editor-model.cc,
workspace-view.cc, call-stack.cc, graphics.cc, input.cc,
interpreter.cc, load-path.cc, pr-output.cc, strfns.cc, sysdep.cc,
audiodevinfo.cc, audioread.cc, convhulln.cc, oct-parse.yy, pt-eval.cc,
lo-sysdep.cc, oct-glob.cc, oct-string.cc, and url-transfer.cc.
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 02 Oct 2020 13:25:00 -0400 |
parents | 445e5ac1f58d |
children | 43ad651cf5a0 |
rev | line source |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 1993-2020 The Octave Project Developers |
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4 // |
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5 // See the file COPYRIGHT.md in the top-level directory of this |
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6 // distribution or <https://octave.org/copyright/>. |
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7 // |
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8 // This file is part of Octave. |
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9 // |
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10 // Octave is free software: you can redistribute it and/or modify it |
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11 // under the terms of the GNU General Public License as published by |
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12 // the Free Software Foundation, either version 3 of the License, or |
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13 // (at your option) any later version. |
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14 // |
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15 // Octave is distributed in the hope that it will be useful, but |
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 // GNU General Public License for more details. |
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19 // |
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20 // You should have received a copy of the GNU General Public License |
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21 // along with Octave; see the file COPYING. If not, see |
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22 // <https://www.gnu.org/licenses/>. |
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23 // |
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24 //////////////////////////////////////////////////////////////////////// |
1 | 25 |
2939 | 26 // Get command input interactively or from files. |
1 | 27 |
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28 #if defined (HAVE_CONFIG_H) |
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29 # include "config.h" |
1 | 30 #endif |
31 | |
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32 #include <cstdio> |
1343 | 33 #include <cstdlib> |
34 #include <cstring> | |
35 #include <cassert> | |
36 | |
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37 #include <algorithm> |
3503 | 38 #include <iostream> |
5765 | 39 #include <sstream> |
1728 | 40 #include <string> |
41 | |
2927 | 42 #include "cmd-edit.h" |
3189 | 43 #include "file-ops.h" |
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44 #include "iconv-wrappers.h" |
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45 #include "localcharset-wrapper.h" |
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46 #include "oct-string.h" |
4153 | 47 #include "quit.h" |
1755 | 48 #include "str-vec.h" |
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49 #include "uniconv-wrappers.h" |
1755 | 50 |
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51 #include "builtin-defun-decls.h" |
1352 | 52 #include "defun.h" |
1 | 53 #include "error.h" |
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54 #include "errwarn.h" |
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55 #include "event-manager.h" |
3016 | 56 #include "help.h" |
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57 #include "hook-fcn.h" |
1 | 58 #include "input.h" |
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59 #include "interpreter-private.h" |
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60 #include "interpreter.h" |
5832 | 61 #include "load-path.h" |
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62 #include "octave.h" |
1352 | 63 #include "oct-map.h" |
1742 | 64 #include "oct-hist.h" |
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65 #include "interpreter.h" |
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66 #include "event-manager.h" |
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67 #include "ovl.h" |
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68 #include "ov-fcn-handle.h" |
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69 #include "ov-usr-fcn.h" |
1 | 70 #include "pager.h" |
529 | 71 #include "parse.h" |
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72 #include "pt-eval.h" |
3805 | 73 #include "pt-stmt.h" |
1352 | 74 #include "sighandlers.h" |
1114 | 75 #include "sysdep.h" |
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76 #include "interpreter.h" |
3098 | 77 #include "unwind-prot.h" |
1352 | 78 #include "utils.h" |
79 #include "variables.h" | |
529 | 80 |
3165 | 81 // The time we last printed a prompt. |
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82 octave::sys::time Vlast_prompt_time = 0.0; |
3165 | 83 |
3804 | 84 // TRUE after a call to completion_matches. |
2299 | 85 bool octave_completion_matches_called = false; |
86 | |
6257 | 87 // TRUE if the plotting system has requested a call to drawnow at |
88 // the next user prompt. | |
7409 | 89 bool Vdrawnow_requested = false; |
6257 | 90 |
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91 // TRUE if we are recording line numbers in a source file. |
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92 // Always true except when debugging and taking input directly from |
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93 // the terminal. |
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94 bool Vtrack_line_num = true; |
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95 |
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96 namespace octave |
6257 | 97 { |
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98 static std::string |
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99 quoting_filename (const std::string& text, int, char quote) |
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100 { |
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101 if (quote) |
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102 return text; |
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103 else |
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104 return ("'" + text); |
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105 } |
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106 |
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107 // Try to parse a partial command line in reverse, excluding trailing TEXT. |
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108 // If it appears a variable has been indexed by () or {}, |
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109 // return that expression, |
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110 // to allow autocomplete of field names of arrays of structures. |
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111 static std::string |
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112 find_indexed_expression (const std::string& text) |
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113 { |
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114 std::string line = command_editor::get_line_buffer (); |
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115 |
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116 int pos = line.length () - text.length (); |
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117 int curly_count = 0; |
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118 int paren_count = 0; |
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119 |
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120 int last = --pos; |
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121 |
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122 while (pos >= 0 && (line[pos] == ')' || line[pos] == '}')) |
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123 { |
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124 if (line[pos] == ')') |
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125 paren_count++; |
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126 else |
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127 curly_count++; |
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128 |
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129 while (curly_count + paren_count > 0 && --pos >= 0) |
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130 { |
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131 if (line[pos] == ')') |
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132 paren_count++; |
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133 else if (line[pos] == '(') |
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134 paren_count--; |
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135 else if (line[pos] == '}') |
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136 curly_count++; |
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137 else if (line[pos] == '{') |
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138 curly_count--; |
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139 } |
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140 |
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141 while (--pos >= 0 && line[pos] == ' ') |
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142 ; |
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143 } |
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144 |
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145 while (pos >= 0 && (isalnum (line[pos]) || line[pos] == '_')) |
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146 pos--; |
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147 |
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148 if (++pos >= 0) |
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149 return (line.substr (pos, last + 1 - pos)); |
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150 else |
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151 return std::string (); |
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152 } |
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153 |
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154 static string_vector |
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155 generate_struct_completions (const std::string& text, |
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156 std::string& prefix, std::string& hint) |
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157 { |
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158 string_vector names; |
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159 |
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160 size_t pos = text.rfind ('.'); |
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161 bool array = false; |
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162 |
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163 if (pos != std::string::npos) |
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164 { |
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165 if (pos == text.length ()) |
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166 hint = ""; |
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167 else |
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168 hint = text.substr (pos+1); |
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169 |
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170 prefix = text.substr (0, pos); |
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171 |
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172 if (prefix == "") |
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173 { |
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174 array = true; |
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175 prefix = find_indexed_expression (text); |
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176 } |
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177 |
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178 std::string base_name = prefix; |
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179 |
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180 pos = base_name.find_first_of ("{(. "); |
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181 |
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182 if (pos != std::string::npos) |
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183 base_name = base_name.substr (0, pos); |
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184 |
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185 interpreter& interp |
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186 = __get_interpreter__ ("generate_struct_completions"); |
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187 |
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188 if (interp.is_variable (base_name)) |
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189 { |
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190 int parse_status; |
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191 |
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192 error_system& es = interp.get_error_system (); |
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193 |
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194 unwind_protect frame; |
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195 |
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196 frame.add_method (es, &error_system::set_discard_warning_messages, |
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197 es.discard_warning_messages ()); |
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198 |
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199 es.discard_warning_messages (true); |
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200 |
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201 try |
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202 { |
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203 octave_value tmp |
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204 = interp.eval_string (prefix, true, parse_status); |
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205 |
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206 frame.run (); |
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207 |
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208 if (tmp.is_defined () |
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209 && (tmp.isstruct () || tmp.isjava () || tmp.is_classdef_object ())) |
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210 names = tmp.map_keys (); |
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211 } |
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212 catch (const execution_exception&) |
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213 { |
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214 interp.recover_from_exception (); |
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215 } |
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216 } |
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217 } |
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218 |
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219 // Undo look-back that found the array expression, |
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220 // but insert an extra "." to distinguish from the non-struct case. |
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221 if (array) |
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222 prefix = "."; |
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223 |
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224 return names; |
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225 } |
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226 |
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227 // FIXME: this will have to be much smarter to work "correctly". |
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228 static bool |
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229 looks_like_struct (const std::string& text, char prev_char) |
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230 { |
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231 bool retval = (! text.empty () |
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232 && (text != "." || prev_char == ')' || prev_char == '}') |
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233 && text.find_first_of (sys::file_ops::dir_sep_chars ()) == std::string::npos |
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234 && text.find ("..") == std::string::npos |
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235 && text.rfind ('.') != std::string::npos); |
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236 |
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237 return retval; |
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238 } |
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239 |
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240 // FIXME: make this generate filenames when appropriate. |
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241 |
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242 static string_vector |
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243 generate_possible_completions (const std::string& text, std::string& prefix, |
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244 std::string& hint, bool& deemed_struct) |
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245 { |
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246 string_vector names; |
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247 |
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248 prefix = ""; |
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249 |
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250 char prev_char = command_editor::get_prev_char (text.length ()); |
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251 deemed_struct = looks_like_struct (text, prev_char); |
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252 |
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253 if (deemed_struct) |
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254 names = generate_struct_completions (text, prefix, hint); |
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255 else |
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256 names = make_name_list (); |
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257 |
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258 // Sort and remove duplicates. |
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259 |
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260 names.sort (true); |
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261 |
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262 return names; |
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263 } |
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264 |
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265 static bool |
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266 is_completing_dirfns (void) |
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267 { |
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268 static std::string dirfns_commands[] = {"cd", "isfile", "isfolder", "ls"}; |
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269 static const size_t dirfns_commands_length = 4; |
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270 |
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271 bool retval = false; |
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272 |
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273 std::string line = command_editor::get_line_buffer (); |
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274 |
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275 for (size_t i = 0; i < dirfns_commands_length; i++) |
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276 { |
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277 int index = line.find (dirfns_commands[i] + ' '); |
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278 |
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279 if (index == 0) |
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280 { |
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281 retval = true; |
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282 break; |
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283 } |
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284 } |
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285 |
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286 return retval; |
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287 } |
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288 |
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289 static std::string |
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290 generate_completion (const std::string& text, int state) |
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291 { |
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292 std::string retval; |
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293 |
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294 static std::string prefix; |
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295 static std::string hint; |
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296 |
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297 static size_t hint_len = 0; |
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298 |
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299 static int list_index = 0; |
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300 static int name_list_len = 0; |
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301 static int name_list_total_len = 0; |
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302 static string_vector name_list; |
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303 static string_vector file_name_list; |
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304 |
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305 static int matches = 0; |
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306 |
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307 if (state == 0) |
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308 { |
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309 list_index = 0; |
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310 |
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311 prefix = ""; |
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312 |
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313 hint = text; |
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314 |
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315 // No reason to display symbols while completing a |
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316 // file/directory operation. |
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317 |
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318 bool deemed_struct = false; |
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319 |
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320 if (is_completing_dirfns ()) |
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321 name_list = string_vector (); |
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322 else |
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323 name_list = generate_possible_completions (text, prefix, hint, |
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324 deemed_struct); |
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325 |
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326 name_list_len = name_list.numel (); |
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327 |
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328 // If the line was something like "a{1}." then text = "." but |
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329 // we don't want to expand all the . files. |
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330 if (! deemed_struct) |
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331 { |
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332 |
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333 file_name_list = command_editor::generate_filename_completions (text); |
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334 |
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335 name_list.append (file_name_list); |
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336 |
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337 } |
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338 |
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339 name_list_total_len = name_list.numel (); |
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340 |
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341 hint_len = hint.length (); |
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342 |
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343 matches = 0; |
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344 |
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345 for (int i = 0; i < name_list_len; i++) |
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346 if (hint == name_list[i].substr (0, hint_len)) |
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347 matches++; |
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348 } |
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349 |
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350 if (name_list_total_len > 0 && matches > 0) |
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351 { |
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352 while (list_index < name_list_total_len) |
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353 { |
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354 std::string name = name_list[list_index]; |
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355 |
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356 list_index++; |
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357 |
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358 if (hint == name.substr (0, hint_len)) |
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359 { |
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360 // Special case: array reference forces prefix="." |
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361 // in generate_struct_completions () |
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362 if (list_index <= name_list_len && ! prefix.empty ()) |
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363 retval = (prefix == "." ? "" : prefix) + '.' + name; |
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364 else |
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365 retval = name; |
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366 |
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367 char prev_char = |
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368 command_editor::get_prev_char (text.length ()); |
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369 |
27101
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370 if (matches == 1 && looks_like_struct (retval, prev_char)) |
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371 { |
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372 // Don't append anything, since we don't know |
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373 // whether it should be '(' or '.'. |
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374 |
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375 command_editor::set_completion_append_character ('\0'); |
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376 } |
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377 else |
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378 { |
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379 input_system& input_sys |
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380 = __get_input_system__ ("generate_completion"); |
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381 |
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382 command_editor::set_completion_append_character |
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383 (input_sys.completion_append_char ()); |
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384 } |
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385 |
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386 break; |
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387 } |
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388 } |
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389 } |
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390 |
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391 return retval; |
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392 } |
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393 |
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394 static int internal_input_event_hook_fcn (void) |
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395 { |
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396 octave_quit (); |
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397 |
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398 input_system& input_sys |
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399 = __get_input_system__ ("internal_input_event_hook_fcn"); |
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400 |
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401 input_sys.run_input_event_hooks (); |
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402 |
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403 return 0; |
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404 } |
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405 |
25407
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406 // Use literal "octave" in default setting for PS1 instead of |
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407 // "\\s" to avoid setting the prompt to "octave.exe" or |
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408 // "octave-gui", etc. |
6257 | 409 |
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410 input_system::input_system (interpreter& interp) |
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411 : m_interpreter (interp), m_PS1 (R"(octave:\#> )"), m_PS2 ("> "), |
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412 m_completion_append_char (' '), m_gud_mode (false), |
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413 m_mfile_encoding ("system"), m_last_debugging_command ("\n"), |
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414 m_input_event_hook_functions (), m_initialized (false) |
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415 { |
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416 } |
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417 |
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418 void input_system::initialize (bool line_editing) |
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419 { |
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420 if (m_initialized) |
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421 return; |
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422 |
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423 // Force default line editor if we don't want readline editing. |
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424 if (! line_editing) |
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425 { |
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426 command_editor::force_default_editor (); |
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427 return; |
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428 } |
6257 | 429 |
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430 // If we are using readline, this allows conditional parsing of the |
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431 // .inputrc file. |
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432 |
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433 command_editor::set_name ("Octave"); |
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434 |
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435 // FIXME: this needs to include a comma too, but that |
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436 // causes trouble for the new struct element completion code. |
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437 |
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438 static const char *s = "\t\n !\"\'*+-/:;<=>(){}[\\]^`~"; |
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439 |
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440 command_editor::set_basic_word_break_characters (s); |
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441 |
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442 command_editor::set_completer_word_break_characters (s); |
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443 |
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444 command_editor::set_basic_quote_characters (R"(")"); |
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445 |
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446 command_editor::set_filename_quote_characters (" \t\n\\\"'@<>=;|&()#$`?*[!:{"); |
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447 |
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448 command_editor::set_completer_quote_characters (R"('")"); |
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449 |
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450 command_editor::set_completion_function (generate_completion); |
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451 |
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452 command_editor::set_quoting_function (quoting_filename); |
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453 |
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454 command_editor::add_event_hook (internal_input_event_hook_fcn); |
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455 |
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456 m_initialized = true; |
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457 } |
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458 |
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459 octave_value |
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460 input_system::PS1 (const octave_value_list& args, int nargout) |
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461 { |
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462 return set_internal_variable (m_PS1, args, nargout, "PS1"); |
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463 } |
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464 |
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465 octave_value |
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466 input_system::PS2 (const octave_value_list& args, int nargout) |
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467 { |
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468 return set_internal_variable (m_PS2, args, nargout, "PS2"); |
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469 } |
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470 |
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471 octave_value |
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472 input_system::completion_append_char (const octave_value_list& args, |
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473 int nargout) |
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474 { |
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475 return set_internal_variable (m_completion_append_char, args, nargout, |
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476 "completion_append_char"); |
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477 } |
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478 |
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479 octave_value |
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480 input_system::gud_mode (const octave_value_list& args, int nargout) |
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481 { |
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482 return set_internal_variable (m_gud_mode, args, nargout, "__gud_mode__"); |
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483 } |
269 | 484 |
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485 octave_value |
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486 input_system::mfile_encoding (const octave_value_list& args, int nargout) |
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487 { |
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488 // Save current value in case there is an error in the additional |
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489 // validation below. |
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490 |
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491 std::string saved_encoding = m_mfile_encoding; |
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492 |
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493 // We must pass the actual variable to change here for temporary |
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494 // "local" settings to work properly. |
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495 |
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496 octave_value retval |
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497 = set_internal_variable (m_mfile_encoding, args, nargout, |
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498 "__mfile_encoding__"); |
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499 |
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500 // Additional validation if the encoding has changed. |
1358 | 501 |
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502 if (m_mfile_encoding != saved_encoding) |
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503 { |
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504 if (m_mfile_encoding.empty ()) |
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505 { |
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506 m_mfile_encoding = "system"; |
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507 } |
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508 else |
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509 { |
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510 std::transform (m_mfile_encoding.begin (), |
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511 m_mfile_encoding.end (), |
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512 m_mfile_encoding.begin (), ::tolower); |
3933 | 513 |
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514 std::string encoding = (m_mfile_encoding.compare ("system") == 0) |
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515 ? octave_locale_charset_wrapper () : m_mfile_encoding; |
3933 | 516 |
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517 // Check for valid encoding name. |
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518 void *codec |
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519 = octave_iconv_open_wrapper (encoding.c_str (), "utf-8"); |
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520 |
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521 if (codec == reinterpret_cast<void *> (-1)) |
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522 { |
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523 m_mfile_encoding = saved_encoding; |
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524 if (errno == EINVAL) |
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525 error ("__mfile_encoding__: conversion from encoding '%s' " |
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526 "not supported", encoding.c_str ()); |
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527 else |
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528 error ("__mfile_encoding__: error %d opening encoding '%s'.", |
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529 errno, encoding.c_str ()); |
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530 } |
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531 else |
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532 octave_iconv_close_wrapper (codec); |
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533 } |
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534 |
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535 } |
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536 |
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537 // Synchronize the related gui preference for editor encoding |
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538 feval ("__event_manager_gui_preference__", |
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539 ovl ("editor/default_encoding", m_mfile_encoding)); |
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540 |
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541 return retval; |
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542 } |
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543 |
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544 bool input_system::yes_or_no (const std::string& prompt) |
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545 { |
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546 std::string prompt_string = prompt + "(yes or no) "; |
6367 | 547 |
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548 while (1) |
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549 { |
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550 bool eof = false; |
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551 |
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552 std::string input_buf = interactive_input (prompt_string, eof); |
6979 | 553 |
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554 if (input_buf == "yes") |
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555 return true; |
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556 else if (input_buf == "no") |
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557 return false; |
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558 else |
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559 message (nullptr, "Please answer yes or no."); |
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560 } |
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561 } |
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562 |
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563 std::string input_system::interactive_input (const std::string& s, bool& eof) |
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564 { |
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565 Vlast_prompt_time.stamp (); |
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566 |
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567 if (Vdrawnow_requested && m_interpreter.interactive ()) |
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568 { |
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569 bool eval_error = false; |
6979 | 570 |
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571 try |
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572 { |
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573 Fdrawnow (m_interpreter); |
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574 } |
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575 catch (const execution_exception& e) |
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576 { |
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577 eval_error = true; |
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578 |
27471 | 579 m_interpreter.handle_exception (e); |
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580 } |
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581 |
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582 flush_stdout (); |
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583 |
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584 // We set Vdrawnow_requested to false even if there is an error in |
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585 // drawnow so that the error doesn't reappear at every prompt. |
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586 |
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587 Vdrawnow_requested = false; |
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588 |
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589 if (eval_error) |
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590 return "\n"; |
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591 } |
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592 |
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593 return gnu_readline (s, eof); |
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594 } |
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595 |
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596 // If the user simply hits return, this will produce an empty matrix. |
6305 | 597 |
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598 octave_value_list |
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599 input_system::get_user_input (const octave_value_list& args, int nargout) |
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600 { |
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601 octave_value_list retval; |
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602 |
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603 int read_as_string = 0; |
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604 |
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605 if (args.length () == 2) |
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606 read_as_string++; |
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607 |
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608 std::string prompt = args(0).xstring_value ("input: unrecognized argument"); |
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609 |
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610 output_system& output_sys = m_interpreter.get_output_system (); |
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611 |
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612 output_sys.reset (); |
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613 |
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614 octave_diary << prompt; |
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615 |
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616 bool eof = false; |
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617 |
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618 std::string input_buf = interactive_input (prompt.c_str (), eof); |
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619 |
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620 if (input_buf.empty ()) |
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621 error ("input: reading user-input failed!"); |
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622 |
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623 size_t len = input_buf.length (); |
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624 |
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625 octave_diary << input_buf; |
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626 |
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627 if (input_buf[len - 1] != '\n') |
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628 octave_diary << "\n"; |
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629 |
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630 if (read_as_string) |
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631 { |
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632 // FIXME: fix gnu_readline and octave_gets instead! |
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633 if (input_buf.length () == 1 && input_buf[0] == '\n') |
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634 retval(0) = ""; |
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635 else |
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636 retval(0) = input_buf; |
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637 } |
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638 else |
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639 { |
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640 int parse_status = 0; |
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641 |
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642 retval |
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643 = m_interpreter.eval_string (input_buf, true, parse_status, nargout); |
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644 |
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645 tree_evaluator& tw = m_interpreter.get_evaluator (); |
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646 |
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647 if (! tw.in_debug_repl () && retval.empty ()) |
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648 retval(0) = Matrix (); |
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649 } |
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650 |
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651 return retval; |
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652 } |
7787
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653 |
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654 bool input_system::have_input_event_hooks (void) const |
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655 { |
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656 return ! m_input_event_hook_functions.empty (); |
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657 } |
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658 |
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659 void input_system::add_input_event_hook (const hook_function& hook_fcn) |
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660 { |
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661 m_input_event_hook_functions.insert (hook_fcn.id (), hook_fcn); |
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662 } |
7787
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Add dbquit and make dbstep compatible. Use parser in debug mode to handle multi-line input
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663 |
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664 bool input_system::remove_input_event_hook (const std::string& hook_fcn_id) |
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665 { |
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666 hook_function_list::iterator p |
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667 = m_input_event_hook_functions.find (hook_fcn_id); |
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668 |
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669 if (p == m_input_event_hook_functions.end ()) |
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670 return false; |
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671 |
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672 m_input_event_hook_functions.erase (p); |
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673 return true; |
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674 } |
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675 |
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676 void input_system::clear_input_event_hooks (void) |
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677 { |
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678 m_input_event_hook_functions.clear (); |
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679 } |
269 | 680 |
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681 void input_system::run_input_event_hooks (void) |
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682 { |
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683 m_input_event_hook_functions.run (); |
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684 } |
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685 |
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686 std::string |
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687 input_system::gnu_readline (const std::string& s, bool& eof) const |
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688 { |
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689 octave_quit (); |
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690 |
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691 eof = false; |
8658
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692 |
27102
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where possible, eliminate octave:: namespace qualifier inside octave namespace
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693 std::string retval = command_editor::readline (s, eof); |
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694 |
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695 if (! eof && retval.empty ()) |
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696 retval = "\n"; |
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697 |
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698 return retval; |
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699 } |
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700 |
27527
73be3c628eac
refactor input_reader class and its use in lexer
John W. Eaton <jwe@octave.org>
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701 std::string base_reader::octave_gets (const std::string& prompt, bool& eof) |
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702 { |
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703 octave_quit (); |
5142 | 704 |
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705 eof = false; |
16097
2f4fa62089b3
improve end of file handling for lexer input
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16053
diff
changeset
|
706 |
23061
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707 std::string retval; |
1 | 708 |
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709 // Process pre input event hook function prior to flushing output and |
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710 // printing the prompt. |
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711 |
27502
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diff
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|
712 tree_evaluator& tw = m_interpreter.get_evaluator (); |
27037
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John W. Eaton <jwe@octave.org>
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|
713 |
27502
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714 event_manager& evmgr = m_interpreter.get_event_manager (); |
27261
dccdc3b001a2
eliminate static functions from octave_link class
John W. Eaton <jwe@octave.org>
parents:
27200
diff
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|
715 |
27502
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changeset
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716 if (m_interpreter.interactive ()) |
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717 { |
27037
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John W. Eaton <jwe@octave.org>
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|
718 if (! tw.in_debug_repl ()) |
27263
99aa1bcb8848
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John W. Eaton <jwe@octave.org>
parents:
27261
diff
changeset
|
719 evmgr.exit_debugger_event (); |
16438
a971d8bdaadc
use signals instead of event queue for entering/leaving debug mode
John W. Eaton <jwe@octave.org>
parents:
16433
diff
changeset
|
720 |
27263
99aa1bcb8848
rename octave_link and octave_link_events classes, move inside octave namespace
John W. Eaton <jwe@octave.org>
parents:
27261
diff
changeset
|
721 evmgr.pre_input_event (); |
16468
0f143f68078d
use signal/slot for updating workspace instead of using event listener
John W. Eaton <jwe@octave.org>
parents:
16438
diff
changeset
|
722 |
27263
99aa1bcb8848
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John W. Eaton <jwe@octave.org>
parents:
27261
diff
changeset
|
723 evmgr.set_workspace (); |
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aedc662896a3
move input reader classes into octave namespace
John W. Eaton <jwe@octave.org>
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diff
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|
724 } |
16349
610617eb84d1
provide pre- and post-input hook functions
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|
725 |
23061
aedc662896a3
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|
726 bool history_skip_auto_repeated_debugging_command = false; |
8841
c74389115610
auto repeat for debugging commands
John W. Eaton <jwe@octave.org>
parents:
8749
diff
changeset
|
727 |
27502
f62f1170ad98
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John W. Eaton <jwe@octave.org>
parents:
27474
diff
changeset
|
728 input_system& input_sys = m_interpreter.get_input_system (); |
25407
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new input_system class to manage user input for the interpreter
John W. Eaton <jwe@octave.org>
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|
729 |
23696
08036a7f3660
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John W. Eaton <jwe@octave.org>
parents:
23694
diff
changeset
|
730 pipe_handler_error_count = 0; |
16198
2c5c538be353
clean up input.cc and eliminate ff_instream global variable
John W. Eaton <jwe@octave.org>
parents:
16195
diff
changeset
|
731 |
27502
f62f1170ad98
in base_reader, store reference to interpreter instead of lexer
John W. Eaton <jwe@octave.org>
parents:
27474
diff
changeset
|
732 output_system& output_sys = m_interpreter.get_output_system (); |
1755 | 733 |
25435
a52e6fb674b1
eliminate some singletons and static & global variables
John W. Eaton <jwe@octave.org>
parents:
25407
diff
changeset
|
734 output_sys.reset (); |
2618 | 735 |
23061
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move input reader classes into octave namespace
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diff
changeset
|
736 octave_diary << prompt; |
1 | 737 |
25407
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diff
changeset
|
738 retval = input_sys.interactive_input (prompt, eof); |
581 | 739 |
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diff
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|
740 // There is no need to update the load_path cache if there is no |
aedc662896a3
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|
741 // user input. |
aedc662896a3
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diff
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|
742 if (retval != "\n" |
aedc662896a3
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diff
changeset
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743 && retval.find_first_not_of (" \t\n\r") != std::string::npos) |
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|
744 { |
27502
f62f1170ad98
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
745 load_path& lp = m_interpreter.get_load_path (); |
23438
d24d01273bd0
eliminate load-path singleton
John W. Eaton <jwe@octave.org>
parents:
23433
diff
changeset
|
746 |
d24d01273bd0
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John W. Eaton <jwe@octave.org>
parents:
23433
diff
changeset
|
747 lp.update (); |
8841
c74389115610
auto repeat for debugging commands
John W. Eaton <jwe@octave.org>
parents:
8749
diff
changeset
|
748 |
27037
8408acb7ca4f
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John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
749 if (tw.in_debug_repl ()) |
25407
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new input_system class to manage user input for the interpreter
John W. Eaton <jwe@octave.org>
parents:
25402
diff
changeset
|
750 input_sys.last_debugging_command (retval); |
23061
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move input reader classes into octave namespace
John W. Eaton <jwe@octave.org>
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diff
changeset
|
751 else |
25407
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
752 input_sys.last_debugging_command ("\n"); |
23061
aedc662896a3
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
753 } |
27037
8408acb7ca4f
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John W. Eaton <jwe@octave.org>
parents:
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diff
changeset
|
754 else if (tw.in_debug_repl ()) |
23061
aedc662896a3
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John W. Eaton <jwe@octave.org>
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diff
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|
755 { |
25407
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
756 retval = input_sys.last_debugging_command (); |
23061
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diff
changeset
|
757 history_skip_auto_repeated_debugging_command = true; |
aedc662896a3
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parents:
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diff
changeset
|
758 } |
1 | 759 |
23061
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|
760 if (retval != "\n") |
aedc662896a3
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John W. Eaton <jwe@octave.org>
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|
761 { |
aedc662896a3
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changeset
|
762 if (! history_skip_auto_repeated_debugging_command) |
aedc662896a3
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diff
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|
763 { |
23696
08036a7f3660
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parents:
23694
diff
changeset
|
764 if (command_history::add (retval)) |
27529
886df2049d81
only increment command number when complete block of code is parsed
John W. Eaton <jwe@octave.org>
parents:
27527
diff
changeset
|
765 evmgr.append_history (retval); |
23061
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John W. Eaton <jwe@octave.org>
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diff
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|
766 } |
1 | 767 |
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move input reader classes into octave namespace
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diff
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|
768 octave_diary << retval; |
3176 | 769 |
26061
cb3ead3cf859
avoid assertion failure with -D_GLIBCXX_ASSERTIONS
Orion Poplawski <orion@cora.nwra.com>
parents:
25054
diff
changeset
|
770 if (! retval.empty () && retval.back () != '\n') |
23061
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move input reader classes into octave namespace
John W. Eaton <jwe@octave.org>
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diff
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771 octave_diary << "\n"; |
aedc662896a3
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|
772 } |
aedc662896a3
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John W. Eaton <jwe@octave.org>
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changeset
|
773 else |
aedc662896a3
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
774 octave_diary << "\n"; |
581 | 775 |
23061
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diff
changeset
|
776 // Process post input event hook function after the internal history |
aedc662896a3
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diff
changeset
|
777 // list has been updated. |
9476 | 778 |
27502
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John W. Eaton <jwe@octave.org>
parents:
27474
diff
changeset
|
779 if (m_interpreter.interactive ()) |
27263
99aa1bcb8848
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
780 evmgr.post_input_event (); |
16349
610617eb84d1
provide pre- and post-input hook functions
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16347
diff
changeset
|
781 |
23061
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diff
changeset
|
782 return retval; |
aedc662896a3
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783 } |
1 | 784 |
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785 class |
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786 terminal_reader : public base_reader |
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787 { |
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788 public: |
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789 |
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790 terminal_reader (interpreter& interp) |
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791 : base_reader (interp) |
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792 { } |
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793 |
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794 std::string get_input (const std::string& prompt, bool& eof); |
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795 |
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796 std::string input_source (void) const { return s_in_src; } |
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797 |
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798 bool input_from_terminal (void) const { return true; } |
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799 |
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800 private: |
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801 |
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802 static const std::string s_in_src; |
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803 }; |
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804 |
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805 class |
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806 file_reader : public base_reader |
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807 { |
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808 public: |
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809 |
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810 file_reader (interpreter& interp, FILE *f_arg) |
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811 : base_reader (interp), m_file (f_arg) { } |
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812 |
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813 std::string get_input (const std::string& prompt, bool& eof); |
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814 |
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815 std::string input_source (void) const { return s_in_src; } |
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816 |
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817 bool input_from_file (void) const { return true; } |
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818 |
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819 private: |
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820 |
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821 FILE *m_file; |
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822 |
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823 static const std::string s_in_src; |
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824 }; |
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825 |
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826 class |
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827 eval_string_reader : public base_reader |
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828 { |
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829 public: |
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830 |
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831 eval_string_reader (interpreter& interp, const std::string& str) |
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832 : base_reader (interp), m_eval_string (str) |
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833 { } |
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834 |
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835 std::string get_input (const std::string& prompt, bool& eof); |
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836 |
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837 std::string input_source (void) const { return s_in_src; } |
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838 |
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839 bool input_from_eval_string (void) const { return true; } |
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840 |
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841 private: |
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842 |
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843 std::string m_eval_string; |
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844 |
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845 static const std::string s_in_src; |
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846 }; |
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847 |
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848 input_reader::input_reader (interpreter& interp) |
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849 : m_rep (new terminal_reader (interp)) |
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850 { } |
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851 |
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852 input_reader::input_reader (interpreter& interp, FILE *file) |
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853 : m_rep (new file_reader (interp, file)) |
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854 { } |
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855 |
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856 input_reader::input_reader (interpreter& interp, const std::string& str) |
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857 : m_rep (new eval_string_reader (interp, str)) |
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858 { } |
17731
f79bf671a493
eliminate global LEXER variable
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|
859 |
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860 const std::string base_reader::s_in_src ("invalid"); |
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861 |
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862 const std::string terminal_reader::s_in_src ("terminal"); |
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863 |
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864 std::string |
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865 terminal_reader::get_input (const std::string& prompt, bool& eof) |
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866 { |
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867 octave_quit (); |
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868 |
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869 eof = false; |
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870 |
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871 return octave_gets (prompt, eof); |
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872 } |
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873 |
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874 const std::string file_reader::s_in_src ("file"); |
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875 |
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876 std::string |
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877 file_reader::get_input (const std::string& /*prompt*/, bool& eof) |
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878 { |
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879 octave_quit (); |
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880 |
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881 eof = false; |
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882 |
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883 std::string src_str = octave_fgets (m_file, eof); |
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884 |
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885 input_system& input_sys = m_interpreter.get_input_system (); |
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886 |
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887 std::string mfile_encoding = input_sys.mfile_encoding (); |
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888 |
27748
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Compare locale charset name in lower case (bug #57304).
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889 std::string encoding; |
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890 if (mfile_encoding.compare ("system") == 0) |
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891 { |
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892 encoding = octave_locale_charset_wrapper (); |
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893 // encoding identifiers should consist of ASCII only characters |
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894 std::transform (encoding.begin (), encoding.end (), encoding.begin (), |
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895 ::tolower); |
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896 } |
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897 else |
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898 encoding = mfile_encoding; |
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|
899 |
25620
467729037209
Strip BOM from UTF-8 encoded .m files (bug #52574).
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|
900 if (encoding.compare ("utf-8") == 0) |
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901 { |
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902 // Check for BOM and strip it |
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|
903 if (src_str.compare (0, 3, "\xef\xbb\xbf") == 0) |
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Create valid UTF-8 from .m file content (bug #57341).
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|
904 src_str.erase (0, 3); |
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|
905 |
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|
906 // replace invalid portions of the string |
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Create valid UTF-8 from .m file content (bug #57341).
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|
907 // FIXME: Include file name that corresponds to m_file. |
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Create valid UTF-8 from .m file content (bug #57341).
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|
908 if (string::u8_validate ("get_input", src_str) > 0) |
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Create valid UTF-8 from .m file content (bug #57341).
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|
909 warning_with_id ("octave:get_input:invalid_utf8", |
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|
910 "Invalid UTF-8 byte sequences have been replaced."); |
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Create valid UTF-8 from .m file content (bug #57341).
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changeset
|
911 } |
25620
467729037209
Strip BOM from UTF-8 encoded .m files (bug #52574).
Markus Mützel <markus.muetzel@gmx.de>
parents:
25441
diff
changeset
|
912 else |
27785
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|
913 { |
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|
914 // convert encoding to UTF-8 before returning string |
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Create valid UTF-8 from .m file content (bug #57341).
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|
915 const char *src = src_str.c_str (); |
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|
916 size_t srclen = src_str.length (); |
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|
917 |
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|
918 size_t length; |
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919 uint8_t *utf8_str; |
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|
920 |
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|
921 utf8_str = octave_u8_conv_from_encoding (encoding.c_str (), src, srclen, |
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|
922 &length); |
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|
923 |
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|
924 if (! utf8_str) |
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|
925 error ("file_reader::get_input: " |
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|
926 "converting from codepage '%s' to UTF-8: %s", |
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|
927 encoding.c_str (), std::strerror (errno)); |
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|
928 |
28825
473ee93cf1ea
Replace unwind_protect with more efficient constructs (bug #59192).
Rik <rik@octave.org>
parents:
28708
diff
changeset
|
929 octave::unwind_action free_utf8_str |
28851
1ac5a76ae91d
use [=] capture default specification where possible
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|
930 ([=] () { ::free (utf8_str); }); |
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931 |
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932 src_str = std::string (reinterpret_cast<char *> (utf8_str), length); |
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933 } |
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934 |
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|
935 return src_str; |
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936 } |
16195
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|
937 |
24833
7c88cf242111
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|
938 const std::string eval_string_reader::s_in_src ("eval_string"); |
16195
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939 |
23061
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|
940 std::string |
27527
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diff
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|
941 eval_string_reader::get_input (const std::string& /*prompt*/, bool& eof) |
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|
942 { |
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|
943 octave_quit (); |
16195
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944 |
23061
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|
945 eof = false; |
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|
946 |
23061
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|
947 std::string retval; |
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|
948 |
24833
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|
949 retval = m_eval_string; |
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950 |
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|
951 // Clear the eval string so that the next call will return |
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952 // an empty character string with EOF = true. |
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953 m_eval_string = ""; |
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|
954 |
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|
955 if (retval.empty ()) |
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956 eof = true; |
16195
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|
957 |
23061
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|
958 return retval; |
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diff
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|
959 } |
16195
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|
960 } |
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|
961 |
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|
962 DEFMETHOD (input, interp, args, nargout, |
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|
963 doc: /* -*- texinfo -*- |
21966
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964 @deftypefn {} {@var{ans} =} input (@var{prompt}) |
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965 @deftypefnx {} {@var{ans} =} input (@var{prompt}, "s") |
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966 Print @var{prompt} and wait for user input. |
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967 |
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|
968 For example, |
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|
969 |
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|
970 @example |
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|
971 input ("Pick a number, any number! ") |
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972 @end example |
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973 |
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|
974 @noindent |
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|
975 prints the prompt |
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976 |
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|
977 @example |
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978 Pick a number, any number! |
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979 @end example |
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|
980 |
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|
981 @noindent |
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982 and waits for the user to enter a value. The string entered by the user |
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983 is evaluated as an expression, so it may be a literal constant, a variable |
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984 name, or any other valid Octave code. |
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985 |
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|
986 The number of return arguments, their size, and their class depend on the |
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|
987 expression entered. |
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|
988 |
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|
989 If you are only interested in getting a literal string value, you can call |
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|
990 @code{input} with the character string @qcode{"s"} as the second argument. |
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|
991 This tells Octave to return the string entered by the user directly, without |
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992 evaluating it first. |
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|
993 |
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|
994 Because there may be output waiting to be displayed by the pager, it is a |
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995 good idea to always call @code{fflush (stdout)} before calling @code{input}. |
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996 This will ensure that all pending output is written to the screen before |
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997 your prompt. |
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998 @seealso{yes_or_no, kbhit, pause, menu, listdlg} |
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|
999 @end deftypefn */) |
529 | 1000 { |
1001 int nargin = args.length (); | |
1002 | |
20801
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|
1003 if (nargin < 1 || nargin > 2) |
5823 | 1004 print_usage (); |
529 | 1005 |
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|
1006 octave::input_system& input_sys = interp.get_input_system (); |
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|
1007 |
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|
1008 return input_sys.get_user_input (args, std::max (nargout, 1)); |
529 | 1009 } |
1010 | |
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|
1011 DEFMETHOD (yes_or_no, interp, args, , |
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|
1012 doc: /* -*- texinfo -*- |
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1013 @deftypefn {} {@var{ans} =} yes_or_no ("@var{prompt}") |
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1014 Ask the user a yes-or-no question. |
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1015 |
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1016 Return logical true if the answer is yes or false if the answer is no. |
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1017 |
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1018 Takes one argument, @var{prompt}, which is the string to display when asking |
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1019 the question. @var{prompt} should end in a space; @code{yes-or-no} adds the |
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1020 string @samp{(yes or no) } to it. The user must confirm the answer with |
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1021 @key{RET} and can edit it until it has been confirmed. |
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1022 @seealso{input} |
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1023 @end deftypefn */) |
5640 | 1024 { |
1025 int nargin = args.length (); | |
1026 | |
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1027 if (nargin > 1) |
5823 | 1028 print_usage (); |
5640 | 1029 |
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1030 octave::input_system& input_sys = interp.get_input_system (); |
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1031 |
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1032 std::string prompt; |
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1033 |
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1034 if (nargin == 1) |
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1035 prompt = args(0).xstring_value ("yes_or_no: PROMPT must be a string"); |
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1036 |
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1037 return ovl (input_sys.yes_or_no (prompt)); |
23728
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1038 } |
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1039 |
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1040 DEFMETHOD (keyboard, interp, args, , |
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1041 doc: /* -*- texinfo -*- |
21966
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1042 @deftypefn {} {} keyboard () |
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1043 @deftypefnx {} {} keyboard ("@var{prompt}") |
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1044 Stop m-file execution and enter debug mode. |
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1045 |
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1046 When the @code{keyboard} function is executed, Octave prints a prompt and |
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1047 waits for user input. The input strings are then evaluated and the results |
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1048 are printed. This makes it possible to examine the values of variables |
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1049 within a function, and to assign new values if necessary. To leave the |
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1050 prompt and return to normal execution type @samp{return} or @samp{dbcont}. |
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1051 The @code{keyboard} function does not return an exit status. |
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1052 |
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1053 If @code{keyboard} is invoked without arguments, a default prompt of |
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1054 @samp{debug> } is used. |
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1055 @seealso{dbstop, dbcont, dbquit} |
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1056 @end deftypefn */) |
529 | 1057 { |
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1058 int nargin = args.length (); |
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1059 |
27037
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1060 if (nargin > 1) |
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1061 print_usage (); |
10186
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1062 |
25402
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1063 octave::tree_evaluator& tw = interp.get_evaluator (); |
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1064 |
27037
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1065 if (nargin == 1) |
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1066 { |
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1067 std::string prompt |
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1068 = args(0).xstring_value ("keyboard: PROMPT must be a string"); |
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1069 |
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1070 tw.keyboard (prompt); |
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1071 } |
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1072 else |
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1073 tw.keyboard (); |
529 | 1074 |
20941
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1075 return ovl (); |
529 | 1076 } |
1077 | |
2234 | 1078 DEFUN (completion_matches, args, nargout, |
21966
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1079 doc: /* -*- texinfo -*- |
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1080 @deftypefn {} {} completion_matches (@var{hint}) |
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1081 Generate possible completions given @var{hint}. |
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1082 |
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1083 This function is provided for the benefit of programs like Emacs which |
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1084 might be controlling Octave and handling user input. The current |
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1085 command number is not incremented when this function is called. This is |
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1086 a feature, not a bug. |
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1087 @end deftypefn */) |
2234 | 1088 { |
20819
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1089 if (args.length () != 1) |
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1090 print_usage (); |
2234 | 1091 |
20939
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1092 octave_value retval; |
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1093 |
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1094 std::string hint = args(0).string_value (); |
2234 | 1095 |
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1096 int n = 32; |
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1097 |
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1098 string_vector list (n); |
20555
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1099 |
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1100 int k = 0; |
2234 | 1101 |
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1102 for (;;) |
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1103 { |
27101
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1104 std::string cmd = octave::generate_completion (hint, k); |
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1105 |
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1106 if (! cmd.empty ()) |
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1107 { |
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1108 if (k == n) |
10315
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1109 { |
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1110 n *= 2; |
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1111 list.resize (n); |
10315
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1112 } |
2234 | 1113 |
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1114 list[k++] = cmd; |
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1115 } |
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1116 else |
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1117 { |
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1118 list.resize (k); |
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1119 break; |
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1120 } |
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1121 } |
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1122 |
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1123 if (nargout > 0) |
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1124 { |
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1125 if (! list.empty ()) |
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1126 retval = list; |
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1127 else |
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1128 retval = ""; |
2234 | 1129 } |
1130 else | |
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1131 { |
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1132 // We don't use string_vector::list_in_columns here |
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1133 // because it will be easier for Emacs if the names |
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1134 // appear in a single column. |
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1135 |
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1136 int len = list.numel (); |
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1137 |
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1138 for (int i = 0; i < len; i++) |
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1139 octave_stdout << list[i] << "\n"; |
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1140 } |
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1141 |
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1142 octave_completion_matches_called = true; |
2234 | 1143 |
1144 return retval; | |
1145 } | |
1146 | |
20239
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1147 /* |
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1148 %!assert (ischar (completion_matches (""))) |
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1149 %!assert (ischar (completion_matches ("a"))) |
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1150 %!assert (ischar (completion_matches (" "))) |
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1151 %!assert (isempty (completion_matches (" "))) |
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1152 %!assert (any (strcmp ("abs", deblank (cellstr (completion_matches ("")))))) |
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1153 %!assert (any (strcmp ("abs", deblank (cellstr (completion_matches ("a")))))) |
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1154 %!assert (any (strcmp ("abs", deblank (cellstr (completion_matches ("ab")))))) |
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1155 %!assert (any (strcmp ("abs", deblank (cellstr (completion_matches ("abs")))))) |
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1156 %!assert (! any (strcmp ("abs", deblank (cellstr (completion_matches ("absa")))))) |
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1157 |
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1158 %!error completion_matches () |
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1159 %!error completion_matches (1, 2) |
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1160 */ |
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1161 |
16879
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1162 DEFUN (readline_read_init_file, args, , |
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1163 doc: /* -*- texinfo -*- |
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1164 @deftypefn {} {} readline_read_init_file (@var{file}) |
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1165 Read the readline library initialization file @var{file}. |
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1166 |
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1167 If @var{file} is omitted, read the default initialization file |
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1168 (normally @file{~/.inputrc}). |
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1169 |
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1170 @xref{Readline Init File, , , readline, GNU Readline Library}, |
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1171 for details. |
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1172 @seealso{readline_re_read_init_file} |
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1173 @end deftypefn */) |
3189 | 1174 { |
1175 int nargin = args.length (); | |
1176 | |
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1177 if (nargin > 1) |
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1178 print_usage (); |
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1179 |
3189 | 1180 if (nargin == 0) |
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1181 octave::command_editor::read_init_file (); |
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1182 else |
3189 | 1183 { |
5872 | 1184 std::string file = args(0).string_value (); |
3189 | 1185 |
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1186 octave::command_editor::read_init_file (file); |
3189 | 1187 } |
1188 | |
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1189 return ovl (); |
3189 | 1190 } |
1191 | |
16880
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1192 DEFUN (readline_re_read_init_file, args, , |
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1193 doc: /* -*- texinfo -*- |
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1194 @deftypefn {} {} readline_re_read_init_file () |
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1195 Re-read the last readline library initialization file that was read. |
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1196 |
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1197 @xref{Readline Init File, , , readline, GNU Readline Library}, |
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1198 for details. |
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1199 @seealso{readline_read_init_file} |
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1200 @end deftypefn */) |
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1201 { |
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1202 if (args.length () != 0) |
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1203 print_usage (); |
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1204 |
21748
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1205 octave::command_editor::re_read_init_file (); |
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1206 |
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1207 return ovl (); |
7758
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1208 } |
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1209 |
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1210 DEFMETHOD (add_input_event_hook, interp, args, , |
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1211 doc: /* -*- texinfo -*- |
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1212 @deftypefn {} {@var{id} =} add_input_event_hook (@var{fcn}) |
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1213 @deftypefnx {} {@var{id} =} add_input_event_hook (@var{fcn}, @var{data}) |
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1214 Add the named function or function handle @var{fcn} to the list of functions |
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1215 to call periodically when Octave is waiting for input. |
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1216 |
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1217 The function should have the form |
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1218 |
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1219 @example |
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1220 @var{fcn} (@var{data}) |
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1221 @end example |
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1222 |
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1223 If @var{data} is omitted, Octave calls the function without any arguments. |
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1224 |
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1225 The returned identifier may be used to remove the function handle from the |
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1226 list of input hook functions. |
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1227 @seealso{remove_input_event_hook} |
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1228 @end deftypefn */) |
3498 | 1229 { |
1230 int nargin = args.length (); | |
1231 | |
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1232 if (nargin < 1 || nargin > 2) |
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1233 print_usage (); |
3498 | 1234 |
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1235 octave_value user_data; |
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1236 |
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1237 if (nargin == 2) |
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1238 user_data = args(1); |
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1239 |
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1240 octave::input_system& input_sys = interp.get_input_system (); |
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1241 |
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1242 hook_function hook_fcn (args(0), user_data); |
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1243 |
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1244 input_sys.add_input_event_hook (hook_fcn); |
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1245 |
21127
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Rik <rik@octave.org>
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|
1246 return ovl (hook_fcn.id ()); |
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1247 } |
3498 | 1248 |
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|
1249 DEFMETHOD (remove_input_event_hook, interp, args, , |
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1250 doc: /* -*- texinfo -*- |
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1251 @deftypefn {} {} remove_input_event_hook (@var{name}) |
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1252 @deftypefnx {} {} remove_input_event_hook (@var{fcn_id}) |
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1253 Remove the named function or function handle with the given identifier |
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1254 from the list of functions to call periodically when Octave is waiting |
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1255 for input. |
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1256 @seealso{add_input_event_hook} |
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1257 @end deftypefn */) |
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1258 { |
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1259 int nargin = args.length (); |
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1260 |
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1261 if (nargin < 1 || nargin > 2) |
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1262 print_usage (); |
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1263 |
26358
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|
1264 std::string hook_fcn_id = args(0).xstring_value ("remove_input_event_hook: argument not valid as a hook function name or id"); |
3498 | 1265 |
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|
1266 bool warn = (nargin < 2); |
3498 | 1267 |
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1268 octave::input_system& input_sys = interp.get_input_system (); |
3498 | 1269 |
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|
1270 if (! input_sys.remove_input_event_hook (hook_fcn_id) && warn) |
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1271 warning ("remove_input_event_hook: %s not found in list", |
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1272 hook_fcn_id.c_str ()); |
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1273 |
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1274 return ovl (); |
3498 | 1275 } |
1276 | |
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1277 DEFMETHOD (PS1, interp, args, nargout, |
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1278 doc: /* -*- texinfo -*- |
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1279 @deftypefn {} {@var{val} =} PS1 () |
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1280 @deftypefnx {} {@var{old_val} =} PS1 (@var{new_val}) |
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1281 @deftypefnx {} {} PS1 (@var{new_val}, "local") |
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1282 Query or set the primary prompt string. |
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1283 |
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1284 When executing interactively, Octave displays the primary prompt when it is |
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1285 ready to read a command. |
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1286 |
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1287 The default value of the primary prompt string is @qcode{'octave:\#> '}. |
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1288 To change it, use a command like |
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1289 |
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1290 @example |
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1291 PS1 ("\\u@@\\H> ") |
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1292 @end example |
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1293 |
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1294 @noindent |
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1295 which will result in the prompt @samp{boris@@kremvax> } for the user |
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1296 @samp{boris} logged in on the host @samp{kremvax.kgb.su}. Note that two |
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1297 backslashes are required to enter a backslash into a double-quoted |
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1298 character string. @xref{Strings}. |
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1299 |
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1300 You can also use ANSI escape sequences if your terminal supports them. |
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1301 This can be useful for coloring the prompt. For example, |
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1302 |
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1303 @example |
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1304 PS1 ('\[\033[01;31m\]\s:\#> \[\033[0m\]') |
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1305 @end example |
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1306 |
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1307 @noindent |
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1308 will give the default Octave prompt a red coloring. |
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1309 |
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1310 When called from inside a function with the @qcode{"local"} option, the |
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1311 variable is changed locally for the function and any subroutines it calls. |
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1312 The original variable value is restored when exiting the function. |
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1313 @seealso{PS2, PS4} |
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1314 @end deftypefn */) |
5794 | 1315 { |
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1316 octave::input_system& input_sys = interp.get_input_system (); |
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1317 |
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1318 return input_sys.PS1 (args, nargout); |
5794 | 1319 } |
2181 | 1320 |
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1321 DEFMETHOD (PS2, interp, args, nargout, |
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1322 doc: /* -*- texinfo -*- |
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1323 @deftypefn {} {@var{val} =} PS2 () |
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1324 @deftypefnx {} {@var{old_val} =} PS2 (@var{new_val}) |
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1325 @deftypefnx {} {} PS2 (@var{new_val}, "local") |
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1326 Query or set the secondary prompt string. |
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1327 |
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1328 The secondary prompt is printed when Octave is expecting additional input to |
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1329 complete a command. For example, if you are typing a @code{for} loop that |
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1330 spans several lines, Octave will print the secondary prompt at the beginning |
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1331 of each line after the first. The default value of the secondary prompt |
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1332 string is @qcode{"> "}. |
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1333 |
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1334 When called from inside a function with the @qcode{"local"} option, the |
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1335 variable is changed locally for the function and any subroutines it calls. |
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1336 The original variable value is restored when exiting the function. |
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1337 @seealso{PS1, PS4} |
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1338 @end deftypefn */) |
5794 | 1339 { |
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1340 octave::input_system& input_sys = interp.get_input_system (); |
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1341 |
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1342 return input_sys.PS2 (args, nargout); |
5794 | 1343 } |
2181 | 1344 |
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1345 DEFMETHOD (completion_append_char, interp, args, nargout, |
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1346 doc: /* -*- texinfo -*- |
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1347 @deftypefn {} {@var{val} =} completion_append_char () |
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1348 @deftypefnx {} {@var{old_val} =} completion_append_char (@var{new_val}) |
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1349 @deftypefnx {} {} completion_append_char (@var{new_val}, "local") |
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1350 Query or set the internal character variable that is appended to |
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1351 successful command-line completion attempts. |
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1352 |
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1353 The default value is @qcode{" "} (a single space). |
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1354 |
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1355 When called from inside a function with the @qcode{"local"} option, the |
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1356 variable is changed locally for the function and any subroutines it calls. |
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1357 The original variable value is restored when exiting the function. |
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1358 @end deftypefn */) |
5794 | 1359 { |
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1360 octave::input_system& input_sys = interp.get_input_system (); |
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1361 |
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1362 return input_sys.completion_append_char (args, nargout); |
5794 | 1363 } |
3019 | 1364 |
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1365 DEFMETHOD (__request_drawnow__, , args, , |
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1366 doc: /* -*- texinfo -*- |
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1367 @deftypefn {} {} __request_drawnow__ () |
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1368 @deftypefnx {} {} __request_drawnow__ (@var{flag}) |
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1369 Undocumented internal function. |
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1370 @end deftypefn */) |
6257 | 1371 { |
1372 int nargin = args.length (); | |
1373 | |
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1374 if (nargin > 1) |
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1375 print_usage (); |
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1376 |
6257 | 1377 if (nargin == 0) |
1378 Vdrawnow_requested = true; | |
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1379 else |
6257 | 1380 Vdrawnow_requested = args(0).bool_value (); |
1381 | |
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1382 return ovl (); |
6257 | 1383 } |
1384 | |
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1385 DEFMETHOD (__gud_mode__, interp, args, nargout, |
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1386 doc: /* -*- texinfo -*- |
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1387 @deftypefn {} {} __gud_mode__ () |
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1388 Undocumented internal function. |
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1389 @end deftypefn */) |
7294 | 1390 { |
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1391 octave::input_system& input_sys = interp.get_input_system (); |
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1392 |
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1393 return input_sys.gud_mode (args, nargout); |
7294 | 1394 } |
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1395 |
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1396 DEFMETHOD (__mfile_encoding__, interp, args, nargout, |
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1397 doc: /* -*- texinfo -*- |
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1398 @deftypefn {} {@var{current_encoding} =} __mfile_encoding__ (@var{new_encoding}) |
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1399 Set and query the codepage that is used for reading .m files. |
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1400 @end deftypefn */) |
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1401 { |
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1402 octave::input_system& input_sys = interp.get_input_system (); |
7294 | 1403 |
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1404 return input_sys.mfile_encoding (args, nargout); |
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1405 } |