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annotate src/terminal.c @ 11668:26265ac3b7ed v8.0.0717

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patch 8.0.0717: terminal feature precence unclear commit https://github.com/vim/vim/commit/26e8558e74fc1701b57f092cc2c3dbf879cf1af3 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jul 15 20:05:54 2017 +0200 patch 8.0.0717: terminal feature precence unclear Problem: Terminal feature not included in :version output. Solution: Add +terminal or -terminal.
author Christian Brabandt <cb@256bit.org>
date Sat, 15 Jul 2017 20:15:03 +0200
parents b8299e742f41
children 3b2afa2b77b3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
11621
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1 /* vi:set ts=8 sts=4 sw=4 noet:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 */
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9
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10 /*
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11 * Terminal window support, see ":help :terminal".
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12 *
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13 * For a terminal one VTerm is constructed. This uses libvterm. A copy of
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14 * that library is in the libvterm directory.
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15 *
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16 * The VTerm invokes callbacks when its screen contents changes. The line
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17 * range is stored in tl_dirty_row_start and tl_dirty_row_end. Once in a
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18 * while, if the window is visible, the screen contents is drawn.
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19 *
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20 * If the terminal window has keyboard focus, typed keys are converted to the
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21 * terminal encoding and writting to the job over a channel.
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22 *
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23 * If the job produces output, it is written to the VTerm.
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24 * This will result in screen updates.
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25 *
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26 * TODO:
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27 * - free b_term when closing terminal.
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28 * - remove term from first_term list when closing terminal.
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29 * - set buffer options to be scratch, hidden, nomodifiable, etc.
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30 * - set buffer name to command, add (1) to avoid duplicates.
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31 * - command line completion (command name)
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32 * - support fixed size when 'termsize' is "rowsXcols".
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33 * - support minimal size when 'termsize' is "rows*cols".
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34 * - support minimal size when 'termsize' is empty.
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35 * - implement ":buf {term-buf-name}"
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36 * - implement term_getsize()
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37 * - implement term_setsize()
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38 * - implement term_sendkeys() send keystrokes to a terminal
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39 * - implement term_wait() wait for screen to be updated
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40 * - implement term_scrape() inspect terminal screen
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41 * - implement term_open() open terminal window
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42 * - implement term_getjob()
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43 */
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44
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45 #include "vim.h"
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46
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47 #ifdef FEAT_TERMINAL
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48
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49 #include "libvterm/include/vterm.h"
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50
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51 /* typedef term_T in structs.h */
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52 struct terminal_S {
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53 term_T *tl_next;
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54
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55 VTerm *tl_vterm;
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56 job_T *tl_job;
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57
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58 /* Range of screen rows to update. Zero based. */
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59 int tl_dirty_row_start; /* -1 if nothing dirty */
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60 int tl_dirty_row_end; /* row below last one to update */
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61
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62 pos_T tl_cursor;
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63 };
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64
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65 #define MAX_ROW 999999 /* used for tl_dirty_row_end to update all rows */
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66
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67 /*
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68 * List of all active terminals.
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69 */
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70 static term_T *first_term = NULL;
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71
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72 static int handle_damage(VTermRect rect, void *user);
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73 static int handle_moverect(VTermRect dest, VTermRect src, void *user);
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74 static int handle_movecursor(VTermPos pos, VTermPos oldpos, int visible, void *user);
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75 static int handle_resize(int rows, int cols, void *user);
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76
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77 static VTermScreenCallbacks screen_callbacks = {
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78 handle_damage, /* damage */
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79 handle_moverect, /* moverect */
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80 handle_movecursor, /* movecursor */
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81 NULL, /* settermprop */
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82 NULL, /* bell */
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83 handle_resize, /* resize */
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84 NULL, /* sb_pushline */
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85 NULL /* sb_popline */
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86 };
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87
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88 /*
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89 * ":terminal": open a terminal window and execute a job in it.
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90 */
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91 void
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92 ex_terminal(exarg_T *eap)
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93 {
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94 int rows;
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95 int cols;
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96 exarg_T split_ea;
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97 win_T *old_curwin = curwin;
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98 typval_T argvars[2];
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99 term_T *term;
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100 VTerm *vterm;
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101 VTermScreen *screen;
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102
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103 if (check_restricted() || check_secure())
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104 return;
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105
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106 term = (term_T *)alloc_clear(sizeof(term_T));
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107 if (term == NULL)
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108 return;
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109 term->tl_dirty_row_end = MAX_ROW;
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110
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111 /* Open a new window or tab. */
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112 vim_memset(&split_ea, 0, sizeof(split_ea));
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113 split_ea.cmdidx = CMD_new;
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114 split_ea.cmd = (char_u *)"new";
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115 split_ea.arg = (char_u *)"";
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116 ex_splitview(&split_ea);
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117 if (curwin == old_curwin)
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118 {
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119 /* split failed */
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120 vim_free(term);
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121 return;
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122 }
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123
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124 curbuf->b_term = term;
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125 term->tl_next = first_term;
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126 first_term = term;
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127
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128 /* TODO: set buffer type, hidden, etc. */
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129
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130 if (*curwin->w_p_tms != NUL)
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131 {
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132 char_u *p = vim_strchr(curwin->w_p_tms, 'x') + 1;
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133
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134 rows = atoi((char *)curwin->w_p_tms);
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135 cols = atoi((char *)p);
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136 /* TODO: resize window if possible. */
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137 }
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138 else
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139 {
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140 rows = curwin->w_height;
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141 cols = curwin->w_width;
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142 }
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143
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144 vterm = vterm_new(rows, cols);
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145 term->tl_vterm = vterm;
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146 screen = vterm_obtain_screen(vterm);
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147 vterm_screen_set_callbacks(screen, &screen_callbacks, term);
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148
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149 argvars[0].v_type = VAR_STRING;
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150 argvars[0].vval.v_string = eap->arg;
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151 argvars[1].v_type = VAR_UNKNOWN;
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152 term->tl_job = job_start(argvars);
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153
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154 /* TODO: setup channels to/from job */
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155 /* Setup pty, see mch_call_shell(). */
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156 }
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157
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158 static int
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159 handle_damage(VTermRect rect, void *user)
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160 {
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161 term_T *term = (term_T *)user;
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162
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163 term->tl_dirty_row_start = MIN(term->tl_dirty_row_start, rect.start_row);
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164 term->tl_dirty_row_end = MAX(term->tl_dirty_row_end, rect.end_row);
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165 return 1;
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166 }
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167
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168 static int
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169 handle_moverect(VTermRect dest, VTermRect src, void *user)
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170 {
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171 /* TODO */
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172 return 1;
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173 }
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174
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175 static int
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176 handle_movecursor(VTermPos pos, VTermPos oldpos, int visible, void *user)
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177 {
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178 /* TODO: handle moving the cursor. */
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179 return 1;
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180 }
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181
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182 static int
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183 handle_resize(int rows, int cols, void *user)
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184 {
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185 /* TODO: handle terminal resize. */
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186 return 1;
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187 }
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188
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189 /* TODO: Use win_del_lines() to make scroll up efficient. */
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190
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191 /* TODO: function to update the window.
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192 * Get the screen contents from vterm with vterm_screen_get_cell().
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193 * put in current_ScreenLine and call screen_line().
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194 */
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195
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196 /* TODO: function to wait for input and send it to the job.
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197 * Return when a CTRL-W command is typed that moves to another window.
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198 * Convert special keys to vterm keys:
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199 * - Write keys to vterm: vterm_keyboard_key()
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200 * - read the output (xterm escape sequences): vterm_output_read()
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201 * - Write output to channel.
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202 */
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203
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204 /* TODO: function to read job output from the channel.
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205 * write to vterm: vterm_input_write()
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206 * This will invoke screen callbacks.
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207 * call vterm_screen_flush_damage()
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208 */
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209
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210 #endif /* FEAT_TERMINAL */