Mercurial > vim
annotate runtime/doc/terminal.txt @ 12425:29d21591ad6b v8.0.1092
patch 8.0.1092: terminal debugger can't evaluate expressions
commit https://github.com/vim/vim/commit/45d5f26d11d9aac2383453d2c1a8582cad1c8a3d
Author: Bram Moolenaar <Bram@vim.org>
Date: Sun Sep 10 19:14:31 2017 +0200
patch 8.0.1092: terminal debugger can't evaluate expressions
Problem: Terminal debugger can't evaluate expressions.
Solution: Add :Evaluate and K. Various other improvements.
author | Christian Brabandt <cb@256bit.org> |
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date | Sun, 10 Sep 2017 19:15:04 +0200 |
parents | 5d4d744151c2 |
children | 85ddf8e00595 |
rev | line source |
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1 *terminal.txt* For Vim version 8.0. Last change: 2017 Sep 10 |
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2 |
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3 |
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4 VIM REFERENCE MANUAL by Bram Moolenaar |
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5 |
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6 |
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7 Terminal window support *terminal* |
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8 |
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9 |
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10 WARNING: THIS IS ONLY PARTLY IMPLEMENTED, ANYTHING CAN STILL CHANGE |
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11 |
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12 The terminal feature is optional, use this to check if your Vim has it: > |
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13 echo has('terminal') |
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14 If the result is "1" you have it. |
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15 |
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16 |
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17 1. Basic use |terminal-use| |
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18 2. Remote testing |terminal-testing| |
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19 3. Debugging |terminal-debug| |
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20 |
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21 {Vi does not have any of these commands} |
12254 | 22 {only available when compiled with the |+terminal| feature} |
23 | |
24 The terminal feature requires the |+multi_byte|, |+job| and |+channel| features. | |
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25 |
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26 ============================================================================== |
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27 1. Basic use *terminal-use* |
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28 |
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29 This feature is for running a terminal emulator in a Vim window. A job can be |
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30 started connected to the terminal emulator. For example, to run a shell: > |
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31 :term bash |
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32 |
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33 Or to run build command: > |
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34 :term make myprogram |
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35 |
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36 The job runs asynchronously from Vim, the window will be updated to show |
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37 output from the job, also while editing in another window. |
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38 |
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39 |
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40 Typing ~ |
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41 |
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42 When the keyboard focus is in the terminal window, typed keys will be sent to |
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43 the job. This uses a pty when possible. You can click outside of the |
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44 terminal window to move keyboard focus elsewhere. |
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45 |
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46 CTRL-W can be used to navigate between windows and other CTRL-W commands, e.g.: |
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47 CTRL-W CTRL-W move focus to the next window |
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48 CTRL-W : enter an Ex command |
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49 See |CTRL-W| for more commands. |
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50 |
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51 Special in the terminal window: *CTRL-W_.* *CTRL-W_N* |
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52 CTRL-W . send a CTRL-W to the job in the terminal |
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53 CTRL-W N go to Terminal-Normal mode, see |Terminal-mode| |
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54 CTRL-\ CTRL-N go to Terminal-Normal mode, see |Terminal-mode| |
11914 | 55 CTRL-W " {reg} paste register {reg} *CTRL-W_quote* |
56 Also works with the = register to insert the result of | |
57 evaluating an expression. | |
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58 CTRL-W CTRL-C ends the job, see below |t_CTRL-W_CTRL-C| |
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59 |
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60 See option 'termkey' for specifying another key instead of CTRL-W that |
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61 will work like CTRL-W. However, typing 'termkey' twice sends 'termkey' to |
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62 the job. For example: |
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63 'termkey' CTRL-W move focus to the next window |
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64 'termkey' : enter an Ex command |
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65 'termkey' 'termkey' send 'termkey' to the job in the terminal |
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66 'termkey' . send a CTRL-W to the job in the terminal |
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67 'termkey' N go to terminal Normal mode, see below |
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68 'termkey' CTRL-N same as CTRL-W N |
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69 'termkey' CTRL-C same as |t_CTRL-W_CTRL-C| |
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70 *t_CTRL-\_CTRL-N* |
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71 The special key combination CTRL-\ CTRL-N can be used to switch to Normal |
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72 mode, just like this works in any other mode. |
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73 *t_CTRL-W_CTRL-C* |
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74 CTRL-W CTRL-C can be typed to forcefully end the job. On MS-Windows a |
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75 CTRL-BREAK will also kill the job. |
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76 |
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77 If you type CTRL-C the effect depends on what the pty has been configured to |
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78 do. For simple commands this causes a SIGINT to be sent to the job, which |
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79 would end it. Other commands may ignore the SIGINT or handle the CTRL-C |
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80 themselves (like Vim does). |
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81 |
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82 |
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83 Size and color ~ |
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84 |
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85 See option 'termsize' for controlling the size of the terminal window. |
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86 (TODO: scrolling when the terminal is larger than the window) |
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87 |
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88 The terminal uses the 'background' option to decide whether the terminal |
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89 window will start with a white or black background. The job running in the |
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90 terminal can change the colors. |
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91 |
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92 |
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93 Syntax ~ |
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94 |
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95 :[range]ter[minal] [options] [command] *:ter* *:terminal* |
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96 Open a new terminal window. |
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97 |
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98 If [command] is provided run it as a job and connect |
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99 the input and output to the terminal. |
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100 If [command] is not given the 'shell' option is used. |
12254 | 101 if [command] is NONE no job is started, the pty of the |
102 terminal can be used by a command like gdb. | |
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103 |
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104 A new buffer will be created, using [command] or |
11914 | 105 'shell' as the name, prefixed with a "!". If a buffer |
106 by this name already exists a number is added in | |
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107 parentheses. E.g. if "gdb" exists the second terminal |
11914 | 108 buffer will use "!gdb (1)". |
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109 |
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110 If [range] is given the specified lines are used as |
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111 input for the job. It will not be possible to type |
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112 keys in the terminal window. For MS-Windows see the |
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113 ++eof argument below. |
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114 |
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115 Two comma separated numbers are used as "rows,cols". |
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116 E.g. `:24,80gdb` opens a terminal with 24 rows and 80 |
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117 columns. However, if the terminal window spans the |
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118 Vim window with, there is no vertical split, the Vim |
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119 window width is used. |
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120 *term++close* *term++open* |
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121 Supported [options] are: |
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122 ++close The terminal window will close |
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123 automatically when the job terminates. |
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124 ++open When the job terminates and no window |
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125 shows it, a window will be opened. |
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126 Note that this can be interruptive. |
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127 ++curwin Open the terminal in the current |
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128 window, do not split the current |
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129 window. Fails if the current buffer |
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130 cannot be |abandon|ed. |
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131 ++hidden Open the terminal in a hidden buffer, |
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132 no window will be used. |
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133 ++rows={height} Use {height} for the terminal window |
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134 height. |
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135 ++cols={width} Use {width} for the terminal window |
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136 width. |
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137 ++eof={text} when using [range]: text to send after |
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138 the last line was written. Cannot |
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139 contain white space. A CR is |
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140 appended. For MS-Windows the default |
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141 is to send CTRL-D. |
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142 E.g. for a shell use "++eof=exit" and |
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143 for Python "++eof=exit()". Special |
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144 codes can be used like with `:map`, |
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145 e.g. "<C-Z>" for CTRL-Z. |
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146 |
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147 If you want to use more options use the |term_start()| |
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148 function. |
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149 |
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150 When the buffer associated with the terminal is unloaded or wiped out the job |
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151 is killed, similar to calling `job_stop(job, "kill")` |
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152 |
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153 So long as the job is running the window behaves like it contains a modified |
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154 buffer. Trying to close the window with `CTRL-W :quit` fails. When using |
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155 `CTRL-W :quit!` the job is ended. The text in the window is lost. The buffer |
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156 still exists, but getting it in a window with `:buffer` will show an empty |
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157 buffer. |
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158 |
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159 Trying to close the window with `CTRL-W :close` also fails. Using |
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160 `CTRL-W :close!` will close the window and make the buffer hidden. |
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161 |
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162 You can use `CTRL-W :hide` to close the terminal window and make the buffer |
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163 hidden, the job keeps running. The `:buffer` command can be used to turn the |
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164 current window into a terminal window. If there are unsaved changes this |
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165 fails, use ! to force, as usual. |
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166 |
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167 To have a background job run without a window, and open the window when it's |
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168 done, use options like this: > |
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169 :term ++hidden ++open make |
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170 Note that the window will open at an unexpected moment, this will interrupt |
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171 what you are doing. |
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172 |
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173 *E947* *E948* |
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174 So long as the job is running, the buffer is considered modified and Vim |
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175 cannot be quit easily, see |abandon|. |
11914 | 176 |
177 When the job has finished and no changes were made to the buffer: closing the | |
178 window will wipe out the buffer. | |
179 | |
180 Before changes can be made to a terminal buffer, the 'modifiable' option must | |
181 be set. This is only possible when the job has finished. At the first change | |
182 the buffer will become a normal buffer and the highlighting is removed. | |
183 You may want to change the buffer name with |:file| to be able to write, since | |
184 the buffer name will still be set to the command. | |
185 | |
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186 |
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187 Resizing ~ |
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188 |
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189 The size of the terminal can be in one of three modes: |
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190 |
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191 1. The 'termsize' option is empty: The terminal size follows the window size. |
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192 The minimal size is 2 screen lines with 10 cells. |
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193 |
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194 2. The 'termsize' option is "rows*cols", where "rows" is the minimal number of |
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195 screen rows and "cols" is the minimal number of cells. |
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196 |
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197 3. The 'termsize' option is "rowsXcols" (where the x is upper or lower case). |
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198 The terminal size is fixed to the specified number of screen lines and |
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199 cells. If the window is bigger there will be unused empty space. |
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200 |
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201 If the window is smaller than the terminal size, only part of the terminal can |
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202 be seen (the lower-left part). |
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203 |
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204 The |term_getsize()| function can be used to get the current size of the |
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205 terminal. |term_setsize()| can be used only when in the first or second mode, |
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206 not when 'termsize' is "rowsXcols". |
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207 |
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208 |
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209 Terminal-Job and Terminal-Normal mode ~ |
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210 *Terminal-mode* |
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211 When the job is running the contents of the terminal is under control of the |
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212 job. That includes the cursor position. Typed keys are sent to the job. |
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213 The terminal contents can change at any time. This is called Terminal-Job |
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214 mode. |
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215 |
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216 Use CTRL-W N (or 'termkey' N) to switch to Terminal-Normal mode. Now the |
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217 contents of the terminal window is under control of Vim, the job output is |
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218 suspended. CTRL-\ CTRL-N does the same. |
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219 *E946* |
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220 In Terminal-Normal mode you can move the cursor around with the usual Vim |
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221 commands, Visually mark text, yank text, etc. But you cannot change the |
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222 contents of the buffer. The commands that would start insert mode, such as |
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223 'i' and 'a', return to Terminal-Job mode. The window will be updated to show |
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224 the contents of the terminal. |
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225 |
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226 In Terminal-Normal mode the statusline and window title show "(Terminal)". If |
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227 the job ends while in Terminal-Normal mode this changes to |
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228 "(Terminal-finished)". |
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229 |
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230 It is not possible to enter Insert mode from Terminal-Job mode. |
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231 |
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232 |
12254 | 233 Cursor style ~ |
234 | |
235 By default the cursor in the terminal window uses a not blinking block. The | |
236 normal xterm escape sequences can be used to change the blinking state and the | |
237 shape. Once focus leaves the terminal window Vim will restore the original | |
238 cursor. | |
239 | |
240 An exception is when xterm is started with the "-bc" argument, or another way | |
241 that causes the cursor to blink. This actually means that the blinking flag | |
242 is inverted. Since Vim cannot detect this, the terminal window cursor | |
243 blinking will also be inverted. | |
244 | |
245 | |
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246 Unix ~ |
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247 |
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248 On Unix a pty is used to make it possible to run all kinds of commands. You |
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249 can even run Vim in the terminal! That's used for debugging, see below. |
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250 |
11914 | 251 Environment variables are used to pass information to the running job: |
252 TERM name of the terminal, 'term' | |
253 ROWS number of rows in the terminal initially | |
254 LINES same as ROWS | |
255 COLUMNS number of columns in the terminal initially | |
256 COLORS number of colors, 't_Co' (256*256*256 in the GUI) | |
257 VIM_SERVERNAME v:servername | |
258 | |
259 The |client-server| feature can be used to communicate with the Vim instance | |
260 where the job was started. This only works when v:servername is not empty. | |
261 If needed you can set it with: > | |
262 call remote_startserver('vim-server') | |
263 | |
264 In the job you can then do something like: > | |
265 vim --servername $VIM_SERVERNAME --remote +123 some_file.c | |
266 This will open the file "some_file.c" and put the cursor on line 123. | |
267 | |
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268 |
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269 MS-Windows ~ |
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270 |
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271 On MS-Windows winpty is used to make it possible to run all kind of commands. |
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272 Obviously, they must be commands that run in a terminal, not open their own |
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273 window. |
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274 |
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275 You need the following two files from winpty: |
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276 |
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277 winpty.dll |
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278 winpty-agent.exe |
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279 |
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280 You can download them from the following page: |
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281 |
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282 https://github.com/rprichard/winpty |
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283 |
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284 Just put the files somewhere in your PATH. You can set the 'winptydll' option |
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285 to point to the right file, if needed. If you have both the 32-bit and 64-bit |
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286 version, rename to winpty32.dll and winpty64.dll to match the way Vim was |
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287 build. |
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288 |
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289 ============================================================================== |
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290 2. Remote testing *terminal-testing* |
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291 |
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292 Most Vim tests execute a script inside Vim. For some tests this does not |
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293 work, running the test interferes with the code being tested. To avoid this |
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294 Vim is executed in a terminal window. The test sends keystrokes to it and |
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295 inspects the resulting screen state. |
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296 |
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297 Functions ~ |
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298 |
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299 term_sendkeys() send keystrokes to a terminal |
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300 term_wait() wait for screen to be updated |
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301 term_scrape() inspect terminal screen |
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302 |
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303 |
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304 ============================================================================== |
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305 3. Debugging *terminal-debug* |
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306 |
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307 The Terminal debugging plugin can be used to debug a program with gdb and view |
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308 the source code in a Vim window. Since this is completely contained inside |
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309 Vim this also works remotely over an ssh connection. |
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310 |
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311 |
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312 Starting ~ |
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313 |
12254 | 314 Load the plugin with this command: > |
315 packadd termdebug | |
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316 < *:Termdebug* |
12254 | 317 To start debugging use `:TermDebug` folowed by the command name, for example: > |
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318 :TermDebug vim |
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319 |
12254 | 320 This opens two windows: |
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321 gdb window A terminal window in which "gdb vim" is executed. Here you |
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322 can directly interact with gdb. The buffer name is "!gdb". |
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323 program window A terminal window for the executed program. When "run" is |
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324 used in gdb the program I/O will happen in this window, so |
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325 that it does not interfere with controlling gdb. The buffer |
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326 name is "gdb program". |
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327 |
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328 The current window is used to show the source code. When gdb pauses the |
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329 source file location will be displayed, if possible. A sign is used to |
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330 highlight the current position (using highlight group debugPC). |
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331 |
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332 If the buffer in the current window is modified, another window will be opened |
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333 to display the current gdb position. |
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334 |
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335 Focus the terminal of the executed program to interact with it. This works |
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336 the same as any command running in a terminal window. |
12254 | 337 |
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338 When the debugger ends, typically by typing "quit" in the gdb window, the two |
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339 opened windows are closed. |
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340 |
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342 Stepping through code ~ |
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343 |
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344 Put focus on the gdb window to type commands there. Some common ones are: |
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345 - CTRL-C interrupt the program |
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346 - next execute the current line and stop at the next line |
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347 - step execute the current line and stop at the next statement, entering |
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348 functions |
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349 - finish execute until leaving the current function |
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350 - where show the stack |
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351 - frame N go to the Nth stack frame |
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352 - continue continue execution |
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353 |
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354 In the window showing the source code some commands can used to control gdb: |
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355 :Break set a breakpoint at the current line; a sign will be displayed |
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356 :Delete delete a breakpoint at the current line |
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357 :Step execute the gdb "step" command |
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358 :Over execute the gdb "next" command (:Next is a Vim command) |
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359 :Finish execute the gdb "finish" command |
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360 :Continue execute the gdb "continue" command |
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361 |
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362 |
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363 Inspecting variables ~ |
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364 |
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365 :Evaluate evaluate the expression under the cursor |
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366 K same |
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367 :Evaluate {expr} evaluate {expr} |
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368 :'<,'>Evaluate evaluate the Visually selected text |
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369 |
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370 This is similar to using "print" in the gdb window. |
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371 |
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372 |
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373 Other commands ~ |
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374 |
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375 :Gdb jump to the gdb window |
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376 :Program jump to the window with the running program |
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377 |
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378 |
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379 Communication ~ |
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380 |
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381 There is another, hidden, buffer, which is used for Vim to communicate with |
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382 gdb. The buffer name is "gdb communication". Do not delete this buffer, it |
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383 will break the debugger. |
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384 |
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385 |
12254 | 386 Customizing ~ |
387 | |
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388 To change the name of the gdb command, set the "termdebugger" variable before |
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389 invoking `:Termdebug`: > |
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390 let termdebugger = "mygdb" |
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391 Only debuggers fully compatible with gdb will work. Vim uses the GDB/MI |
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392 interface. |
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393 |
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394 The color of the signs can be adjusted with these highlight groups: |
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395 - debugPC the current position |
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396 - debugBreakpoint a breakpoint |
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397 |
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398 The defaults are, when 'background' is "light": |
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399 hi debugPC term=reverse ctermbg=lightblue guibg=lightblue |
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400 hi debugBreakpoint term=reverse ctermbg=red guibg=red |
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401 |
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402 When 'background' is "dark": |
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403 hi debugPC term=reverse ctermbg=darkblue guibg=darkblue |
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404 hi debugBreakpoint term=reverse ctermbg=red guibg=red |
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406 |
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407 |
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408 vim:tw=78:ts=8:ft=help:norl: |