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1 /*
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2 * User-level command processor.
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3 */
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4
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5 #include "less.h"
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6 #include "position.h"
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7 #include "option.h"
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8 #include "cmd.h"
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9
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10 #define NO_MCA 0
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11 #define MCA_DONE 1
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12 #define MCA_MORE 2
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13
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14 extern int erase_char, kill_char;
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15 extern int ispipe;
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16 extern int sigs;
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17 extern int quit_at_eof;
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18 extern int hit_eof;
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19 extern int sc_width;
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20 extern int sc_height;
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21 extern int swindow;
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22 extern int jump_sline;
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23 extern int quitting;
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24 extern int scroll;
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25 extern int nohelp;
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26 extern int ignore_eoi;
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27 extern char *every_first_cmd;
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28 extern char version[];
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29 extern struct scrpos initial_scrpos;
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30 extern IFILE curr_ifile;
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31 #if EDITOR
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32 extern char *editor;
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33 extern char *editproto;
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34 #endif
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35 extern int screen_trashed; /* The screen has been overwritten */
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36
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37 static char ungot[100];
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38 static char *ungotp = NULL;
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39 #if SHELL_ESCAPE
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40 static char *shellcmd = NULL; /* For holding last shell command for "!!" */
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41 #endif
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42 static int mca; /* The multicharacter command (action) */
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43 static int search_type; /* The previous type of search */
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44 static int number; /* The number typed by the user */
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45 static char optchar;
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46 static int optflag;
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47 #if PIPEC
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48 static char pipec;
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49 #endif
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50
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51 static void multi_search();
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52
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53 /*
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54 * Move the cursor to lower left before executing a command.
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55 * This looks nicer if the command takes a long time before
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56 * updating the screen.
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57 */
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58 static void
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59 cmd_exec()
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60 {
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61 lower_left();
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62 flush();
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63 }
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64
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65 /*
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66 * Set up the display to start a new multi-character command.
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67 */
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68 static void
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69 start_mca(action, prompt)
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70 int action;
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71 char *prompt;
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72 {
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73 mca = action;
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74 lower_left();
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75 clear_eol();
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76 cmd_putstr(prompt);
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77 }
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78
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79 /*
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80 * Set up the display to start a new search command.
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81 */
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82 static void
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83 mca_search()
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84 {
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85 switch (SRCH_DIR(search_type))
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86 {
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87 case SRCH_FORW:
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88 mca = A_F_SEARCH;
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89 break;
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90 case SRCH_BACK:
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91 mca = A_B_SEARCH;
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92 break;
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93 }
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94
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95 lower_left();
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96 clear_eol();
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97
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98 if (search_type & SRCH_FIRST_FILE)
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99 cmd_putstr("@");
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100
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101 if (search_type & SRCH_PAST_EOF)
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102 cmd_putstr("*");
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103
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104 if (search_type & SRCH_NOMATCH)
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105 cmd_putstr("!");
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106
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107 switch (SRCH_DIR(search_type))
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108 {
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109 case SRCH_FORW:
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110 cmd_putstr("/");
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111 break;
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112 case SRCH_BACK:
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113 cmd_putstr("?");
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114 break;
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115 }
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116 }
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117
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118 /*
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119 * Execute a multicharacter command.
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120 */
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121 static void
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122 exec_mca()
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123 {
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124 register char *cbuf;
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125 register char *s;
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126
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127 cmd_exec();
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128 cbuf = get_cmdbuf();
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129
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130 switch (mca)
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131 {
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132 case A_F_SEARCH:
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133 case A_B_SEARCH:
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134 multi_search(cbuf, number);
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135 break;
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136 case A_FIRSTCMD:
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137 /*
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138 * Skip leading spaces or + signs in the string.
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139 */
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140 while (*cbuf == '+' || *cbuf == ' ')
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141 cbuf++;
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142 if (every_first_cmd != NULL)
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143 free(every_first_cmd);
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144 if (*cbuf == '\0')
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145 every_first_cmd = NULL;
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146 else
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147 every_first_cmd = save(cbuf);
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148 break;
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149 case A_OPT_TOGGLE:
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150 toggle_option(optchar, cbuf, optflag);
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151 optchar = '\0';
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152 break;
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153 case A_F_BRACKET:
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154 match_brac(cbuf[0], cbuf[1], 1, number);
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155 break;
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156 case A_B_BRACKET:
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157 match_brac(cbuf[1], cbuf[0], 0, number);
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158 break;
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159 case A_EXAMINE:
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160 /*
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161 * Ignore leading spaces and glob the filename.
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162 */
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163 cbuf = skipsp(cbuf);
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164 s = glob(cbuf);
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165 if (s != NULL)
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166 {
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167 edit_list(s);
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168 free(s);
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169 } else
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170 edit_list(cbuf);
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171 break;
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172 #if SHELL_ESCAPE
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173 case A_SHELL:
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174 /*
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175 * !! just uses whatever is in shellcmd.
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176 * Otherwise, copy cmdbuf to shellcmd,
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177 * expanding any special characters ("%" or "#").
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178 */
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179 if (*cbuf != '!')
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180 {
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181 if (shellcmd != NULL)
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182 free(shellcmd);
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183 shellcmd = fexpand(cbuf);
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184 if (shellcmd == NULL)
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185 break;
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186 }
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187
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188 if (shellcmd == NULL)
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189 lsystem("");
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190 else
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191 lsystem(shellcmd);
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192 error("!done", NULL_PARG);
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193 break;
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194 #endif
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195 #if PIPEC
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196 case A_PIPE:
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197 (void) pipe_mark(pipec, cbuf);
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198 error("|done", NULL_PARG);
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199 break;
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200 #endif
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201 }
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202 }
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203
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204 /*
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205 * Add a character to a multi-character command.
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206 */
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207 static int
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208 mca_char(c)
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209 int c;
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210 {
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211 char *p;
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212 int flag;
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213 char buf[3];
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214
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215 switch (mca)
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216 {
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217 case 0:
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218 /*
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219 * Not in a multicharacter command.
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220 */
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221 return (NO_MCA);
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222
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223 case A_PREFIX:
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224 /*
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225 * In the prefix of a command.
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226 * This not considered a multichar command
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227 * (even tho it uses cmdbuf, etc.).
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228 * It is handled in the commands() switch.
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229 */
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230 return (NO_MCA);
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231
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232 case A_DIGIT:
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233 /*
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234 * Entering digits of a number.
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235 * Terminated by a non-digit.
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236 */
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237 if ((c < '0' || c > '9') &&
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238 c != erase_char && c != kill_char)
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239 {
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240 /*
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241 * Not part of the number.
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242 * Treat as a normal command character.
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243 */
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244 number = cmd_int();
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245 mca = 0;
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246 return (NO_MCA);
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247 }
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248 break;
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249
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250 case A_OPT_TOGGLE:
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251 /*
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252 * Special case for the TOGGLE_OPTION command.
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253 * If the option letter which was entered is a
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254 * single-char option, execute the command immediately,
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255 * so user doesn't have to hit RETURN.
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256 * If the first char is + or -, this indicates
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257 * OPT_UNSET or OPT_SET respectively, instead of OPT_TOGGLE.
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258 */
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259 if (c == erase_char || c == kill_char)
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260 break;
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261 if (optchar != '\0' && optchar != '+' && optchar != '-')
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262 /*
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263 * We already have the option letter.
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264 */
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265 break;
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266 switch (c)
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267 {
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268 case '+':
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269 optflag = OPT_UNSET;
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270 break;
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271 case '-':
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272 optflag = OPT_SET;
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273 break;
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274 default:
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275 optchar = c;
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276 if (optflag != OPT_TOGGLE || single_char_option(c))
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277 {
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278 toggle_option(c, "", optflag);
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279 return (MCA_DONE);
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280 }
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281 break;
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282 }
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283 if (optchar == '+' || optchar == '-')
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284 {
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285 optchar = c;
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286 break;
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287 }
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288 /*
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289 * Display a prompt appropriate for the option letter.
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290 */
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291 if ((p = opt_prompt(c)) == NULL)
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292 {
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293 buf[0] = '-';
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294 buf[1] = c;
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295 buf[2] = '\0';
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296 p = buf;
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297 }
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298 start_mca(A_OPT_TOGGLE, p);
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299 return (MCA_MORE);
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300
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301 case A_F_SEARCH:
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302 case A_B_SEARCH:
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303 /*
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304 * Special case for search commands.
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305 * Certain characters as the first char of
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306 * the pattern have special meaning:
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307 * ! Toggle the NOMATCH flag
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308 * * Toggle the PAST_EOF flag
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309 * @ Toggle the FIRST_FILE flag
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310 */
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311 if (len_cmdbuf() > 0)
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312 /*
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313 * Only works for the first char of the pattern.
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314 */
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315 break;
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316
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317 flag = 0;
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318 switch (c)
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319 {
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320 case '!':
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321 flag = SRCH_NOMATCH;
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322 break;
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323 case '@':
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324 flag = SRCH_FIRST_FILE;
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325 break;
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326 case '*':
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327 flag = SRCH_PAST_EOF;
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328 break;
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329 }
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330 if (flag != 0)
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331 {
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332 search_type ^= flag;
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333 mca_search();
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334 return (MCA_MORE);
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335 }
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336 break;
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337 }
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338
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339 /*
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340 * Any other multicharacter command
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341 * is terminated by a newline.
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342 */
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343 if (c == '\n' || c == '\r')
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344 {
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345 /*
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346 * Execute the command.
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347 */
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348 exec_mca();
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349 return (MCA_DONE);
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350 }
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351 /*
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352 * Append the char to the command buffer.
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353 */
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354 if (cmd_char(c))
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355 /*
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356 * Abort the multi-char command.
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357 */
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358 return (MCA_DONE);
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359
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360 if ((mca == A_F_BRACKET || mca == A_B_BRACKET) && len_cmdbuf() >= 2)
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361 {
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362 /*
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363 * Special case for the bracket-matching commands.
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364 * Execute the command after getting exactly two
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365 * characters from the user.
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366 */
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367 exec_mca();
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368 return (MCA_DONE);
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369 }
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370
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371 /*
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372 * Need another character.
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373 */
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374 return (MCA_MORE);
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375 }
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376
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377 /*
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378 * Display the appropriate prompt.
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379 */
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380 static void
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381 prompt()
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382 {
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383 register char *p;
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384
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385 if (ungotp != NULL && ungotp > ungot)
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386 {
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387 /*
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388 * No prompt necessary if commands are from
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389 * ungotten chars rather than from the user.
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390 */
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391 return;
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392 }
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393
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394 /*
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395 * If nothing is displayed yet, display starting from initial_scrpos.
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396 */
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397 if (empty_screen())
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398 {
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399 if (initial_scrpos.pos == NULL_POSITION)
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400 /*
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401 * {{ Maybe this should be:
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402 * jump_loc(ch_zero(), jump_sline);
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403 * but this behavior seems rather unexpected
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404 * on the first screen. }}
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405 */
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406 jump_loc(ch_zero(), 1);
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407 else
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408 jump_loc(initial_scrpos.pos, initial_scrpos.ln);
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409 } else if (screen_trashed)
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410 repaint();
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411
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412 /*
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413 * If the -E flag is set and we've hit EOF on the last file, quit.
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414 */
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415 if (quit_at_eof == 2 && hit_eof &&
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416 next_ifile(curr_ifile) == NULL_IFILE)
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417 quit(0);
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418
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419 /*
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420 * Select the proper prompt and display it.
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421 */
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422 lower_left();
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423 clear_eol();
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424 p = pr_string();
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425 if (p == NULL)
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426 putchr(':');
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427 else
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428 {
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429 so_enter();
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430 putstr(p);
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431 so_exit();
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432 }
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433 #if __MSDOS__
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434 scroll_bar();
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435 #endif
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436 }
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437
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438 /*
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439 * Get command character.
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440 * The character normally comes from the keyboard,
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441 * but may come from ungotten characters
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442 * (characters previously given to ungetcc or ungetsc).
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443 */
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444 static int
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445 getcc()
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446 {
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447 if (ungotp == NULL)
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448 /*
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449 * Normal case: no ungotten chars, so get one from the user.
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450 */
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451 return (getchr());
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452
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453 if (ungotp > ungot)
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454 /*
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455 * Return the next ungotten char.
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456 */
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457 return (*--ungotp);
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458
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459 /*
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460 * We have just run out of ungotten chars.
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461 */
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462 ungotp = NULL;
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463 if (len_cmdbuf() == 0 || !empty_screen())
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464 return (getchr());
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465 /*
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466 * Command is incomplete, so try to complete it.
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467 */
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468 switch (mca)
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469 {
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470 case A_DIGIT:
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471 /*
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472 * We have a number but no command. Treat as #g.
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473 */
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474 return ('g');
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475
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476 case A_F_SEARCH:
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|
477 case A_B_SEARCH:
|
|
|
478 /*
|
|
|
479 * We have "/string" but no newline. Add the \n.
|
|
|
480 */
|
|
|
481 return ('\n');
|
|
|
482
|
|
|
483 default:
|
|
|
484 /*
|
|
|
485 * Some other incomplete command. Let user complete it.
|
|
|
486 */
|
|
|
487 return (getchr());
|
|
|
488 }
|
|
|
489 }
|
|
|
490
|
|
|
491 /*
|
|
|
492 * "Unget" a command character.
|
|
|
493 * The next getcc() will return this character.
|
|
|
494 */
|
|
|
495 public void
|
|
|
496 ungetcc(c)
|
|
|
497 int c;
|
|
|
498 {
|
|
|
499 if (ungotp == NULL)
|
|
|
500 ungotp = ungot;
|
|
|
501 if (ungotp >= ungot + sizeof(ungot))
|
|
|
502 {
|
|
|
503 error("ungetcc overflow", NULL_PARG);
|
|
|
504 quit(1);
|
|
|
505 }
|
|
|
506 *ungotp++ = c;
|
|
|
507 }
|
|
|
508
|
|
|
509 /*
|
|
|
510 * Unget a whole string of command characters.
|
|
|
511 * The next sequence of getcc()'s will return this string.
|
|
|
512 */
|
|
|
513 public void
|
|
|
514 ungetsc(s)
|
|
|
515 char *s;
|
|
|
516 {
|
|
|
517 register char *p;
|
|
|
518
|
|
|
519 for (p = s + strlen(s) - 1; p >= s; p--)
|
|
|
520 ungetcc(*p);
|
|
|
521 }
|
|
|
522
|
|
|
523 /*
|
|
|
524 * Search for a pattern, possibly in multiple files.
|
|
|
525 * If SRCH_FIRST_FILE is set, begin searching at the first file.
|
|
|
526 * If SRCH_PAST_EOF is set, continue the search thru multiple files.
|
|
|
527 */
|
|
|
528 static void
|
|
|
529 multi_search(pattern, n)
|
|
|
530 char *pattern;
|
|
|
531 int n;
|
|
|
532 {
|
|
|
533 register int nomore;
|
|
|
534 char *curr_filename;
|
|
|
535 int changed_file;
|
|
|
536
|
|
|
537 changed_file = 0;
|
|
|
538 curr_filename = get_filename(curr_ifile);
|
|
|
539
|
|
|
540 if (search_type & SRCH_FIRST_FILE)
|
|
|
541 {
|
|
|
542 /*
|
|
|
543 * Start at the first (or last) file
|
|
|
544 * in the command line list.
|
|
|
545 */
|
|
|
546 if (SRCH_DIR(search_type) == SRCH_FORW)
|
|
|
547 nomore = edit_first();
|
|
|
548 else
|
|
|
549 nomore = edit_last();
|
|
|
550 if (nomore)
|
|
|
551 return;
|
|
|
552 changed_file = 1;
|
|
|
553 search_type &= ~SRCH_FIRST_FILE;
|
|
|
554 }
|
|
|
555
|
|
|
556 for (;;)
|
|
|
557 {
|
|
|
558 if ((n = search(search_type, pattern, n)) == 0)
|
|
|
559 /*
|
|
|
560 * Found it.
|
|
|
561 */
|
|
|
562 return;
|
|
|
563
|
|
|
564 if (n < 0)
|
|
|
565 /*
|
|
|
566 * Some kind of error in the search.
|
|
|
567 * Error message has been printed by search().
|
|
|
568 */
|
|
|
569 break;
|
|
|
570
|
|
|
571 if ((search_type & SRCH_PAST_EOF) == 0)
|
|
|
572 /*
|
|
|
573 * We didn't find a match, but we're
|
|
|
574 * supposed to search only one file.
|
|
|
575 */
|
|
|
576 break;
|
|
|
577 /*
|
|
|
578 * Move on to the next file.
|
|
|
579 */
|
|
|
580 if (SRCH_DIR(search_type) == SRCH_BACK)
|
|
|
581 nomore = edit_prev(1);
|
|
|
582 else
|
|
|
583 nomore = edit_next(1);
|
|
|
584 if (nomore)
|
|
|
585 break;
|
|
|
586 changed_file = 1;
|
|
|
587 }
|
|
|
588
|
|
|
589 /*
|
|
|
590 * Didn't find it.
|
|
|
591 * Print an error message if we haven't already.
|
|
|
592 */
|
|
|
593 if (n > 0)
|
|
|
594 error("Pattern not found", NULL_PARG);
|
|
|
595
|
|
|
596 if (changed_file)
|
|
|
597 /*
|
|
|
598 * Restore the file we were originally viewing.
|
|
|
599 */
|
|
|
600 (void) edit(curr_filename, 0);
|
|
|
601 }
|
|
|
602
|
|
|
603 /*
|
|
|
604 * Main command processor.
|
|
|
605 * Accept and execute commands until a quit command.
|
|
|
606 */
|
|
|
607 public void
|
|
|
608 commands()
|
|
|
609 {
|
|
|
610 register int c;
|
|
|
611 register int action;
|
|
|
612 register char *cbuf;
|
|
|
613 int save_search_type;
|
|
|
614 char *s;
|
|
|
615 char tbuf[2];
|
|
|
616 PARG parg;
|
|
|
617
|
|
|
618 search_type = SRCH_FORW;
|
|
|
619 scroll = (sc_height + 1) / 2;
|
|
|
620
|
|
|
621 for (;;)
|
|
|
622 {
|
|
|
623 mca = 0;
|
|
|
624 number = 0;
|
|
|
625 optchar = '\0';
|
|
|
626
|
|
|
627 /*
|
|
|
628 * See if any signals need processing.
|
|
|
629 */
|
|
|
630 if (sigs)
|
|
|
631 {
|
|
|
632 psignals();
|
|
|
633 if (quitting)
|
|
|
634 quit(-1);
|
|
|
635 }
|
|
|
636
|
|
|
637 /*
|
|
|
638 * Display prompt and accept a character.
|
|
|
639 */
|
|
|
640 cmd_reset();
|
|
|
641 prompt();
|
|
|
642 if (sigs)
|
|
|
643 continue;
|
|
|
644 c = getcc();
|
|
|
645
|
|
|
646 again:
|
|
|
647 if (sigs)
|
|
|
648 continue;
|
|
|
649
|
|
|
650 /*
|
|
|
651 * If we are in a multicharacter command, call mca_char.
|
|
|
652 * Otherwise we call cmd_decode to determine the
|
|
|
653 * action to be performed.
|
|
|
654 */
|
|
|
655 if (mca)
|
|
|
656 switch (mca_char(c))
|
|
|
657 {
|
|
|
658 case MCA_MORE:
|
|
|
659 /*
|
|
|
660 * Need another character.
|
|
|
661 */
|
|
|
662 c = getcc();
|
|
|
663 goto again;
|
|
|
664 case MCA_DONE:
|
|
|
665 /*
|
|
|
666 * Command has been handled by mca_char.
|
|
|
667 * Start clean with a prompt.
|
|
|
668 */
|
|
|
669 continue;
|
|
|
670 case NO_MCA:
|
|
|
671 /*
|
|
|
672 * Not a multi-char command
|
|
|
673 * (at least, not anymore).
|
|
|
674 */
|
|
|
675 break;
|
|
|
676 }
|
|
|
677
|
|
|
678 /*
|
|
|
679 * Decode the command character and decide what to do.
|
|
|
680 */
|
|
|
681 if (mca)
|
|
|
682 {
|
|
|
683 /*
|
|
|
684 * We're in a multichar command.
|
|
|
685 * Add the character to the command buffer
|
|
|
686 * and display it on the screen.
|
|
|
687 * If the user backspaces past the start
|
|
|
688 * of the line, abort the command.
|
|
|
689 */
|
|
|
690 if (cmd_char(c) || len_cmdbuf() == 0)
|
|
|
691 continue;
|
|
|
692 cbuf = get_cmdbuf();
|
|
|
693 } else
|
|
|
694 {
|
|
|
695 /*
|
|
|
696 * Don't use cmd_char if we're starting fresh
|
|
|
697 * at the beginning of a command, because we
|
|
|
698 * don't want to echo the command until we know
|
|
|
699 * it is a multichar command. We also don't
|
|
|
700 * want erase_char/kill_char to be treated
|
|
|
701 * as line editing characters.
|
|
|
702 */
|
|
|
703 tbuf[0] = c;
|
|
|
704 tbuf[1] = '\0';
|
|
|
705 cbuf = tbuf;
|
|
|
706 }
|
|
|
707 s = NULL;
|
|
|
708 action = cmd_decode(cbuf, &s);
|
|
|
709 /*
|
|
|
710 * If an "extra" string was returned,
|
|
|
711 * process it as a string of command characters.
|
|
|
712 */
|
|
|
713 if (s != NULL)
|
|
|
714 ungetsc(s);
|
|
|
715 /*
|
|
|
716 * Clear the cmdbuf string.
|
|
|
717 * (But not if we're in the prefix of a command,
|
|
|
718 * because the partial command string is kept there.)
|
|
|
719 */
|
|
|
720 if (action != A_PREFIX)
|
|
|
721 cmd_reset();
|
|
|
722
|
|
|
723 switch (action)
|
|
|
724 {
|
|
|
725 case A_DIGIT:
|
|
|
726 /*
|
|
|
727 * First digit of a number.
|
|
|
728 */
|
|
|
729 start_mca(A_DIGIT, ":");
|
|
|
730 goto again;
|
|
|
731
|
|
|
732 case A_F_WINDOW:
|
|
|
733 /*
|
|
|
734 * Forward one window (and set the window size).
|
|
|
735 */
|
|
|
736 if (number > 0)
|
|
|
737 swindow = number;
|
|
|
738 /* FALLTHRU */
|
|
|
739 case A_F_SCREEN:
|
|
|
740 /*
|
|
|
741 * Forward one screen.
|
|
|
742 */
|
|
|
743 if (number <= 0)
|
|
|
744 number = swindow;
|
|
|
745 cmd_exec();
|
|
|
746 forward(number, 0, 1);
|
|
|
747 break;
|
|
|
748
|
|
|
749 case A_B_WINDOW:
|
|
|
750 /*
|
|
|
751 * Backward one window (and set the window size).
|
|
|
752 */
|
|
|
753 if (number > 0)
|
|
|
754 swindow = number;
|
|
|
755 /* FALLTHRU */
|
|
|
756 case A_B_SCREEN:
|
|
|
757 /*
|
|
|
758 * Backward one screen.
|
|
|
759 */
|
|
|
760 if (number <= 0)
|
|
|
761 number = swindow;
|
|
|
762 cmd_exec();
|
|
|
763 backward(number, 0, 1);
|
|
|
764 break;
|
|
|
765
|
|
|
766 case A_F_LINE:
|
|
|
767 /*
|
|
|
768 * Forward N (default 1) line.
|
|
|
769 */
|
|
|
770 if (number <= 0)
|
|
|
771 number = 1;
|
|
|
772 cmd_exec();
|
|
|
773 forward(number, 0, 0);
|
|
|
774 break;
|
|
|
775
|
|
|
776 case A_B_LINE:
|
|
|
777 /*
|
|
|
778 * Backward N (default 1) line.
|
|
|
779 */
|
|
|
780 if (number <= 0)
|
|
|
781 number = 1;
|
|
|
782 cmd_exec();
|
|
|
783 backward(number, 0, 0);
|
|
|
784 break;
|
|
|
785
|
|
|
786 case A_FF_LINE:
|
|
|
787 /*
|
|
|
788 * Force forward N (default 1) line.
|
|
|
789 */
|
|
|
790 if (number <= 0)
|
|
|
791 number = 1;
|
|
|
792 cmd_exec();
|
|
|
793 forward(number, 1, 0);
|
|
|
794 break;
|
|
|
795
|
|
|
796 case A_BF_LINE:
|
|
|
797 /*
|
|
|
798 * Force backward N (default 1) line.
|
|
|
799 */
|
|
|
800 if (number <= 0)
|
|
|
801 number = 1;
|
|
|
802 cmd_exec();
|
|
|
803 backward(number, 1, 0);
|
|
|
804 break;
|
|
|
805
|
|
|
806 case A_F_FOREVER:
|
|
|
807 /*
|
|
|
808 * Forward forever, ignoring EOF.
|
|
|
809 */
|
|
|
810 cmd_exec();
|
|
|
811 jump_forw();
|
|
|
812 ignore_eoi = 1;
|
|
|
813 hit_eof = 0;
|
|
|
814 while (sigs == 0)
|
|
|
815 forward(1, 0, 0);
|
|
|
816 ignore_eoi = 0;
|
|
|
817 break;
|
|
|
818
|
|
|
819 case A_F_SCROLL:
|
|
|
820 /*
|
|
|
821 * Forward N lines
|
|
|
822 * (default same as last 'd' or 'u' command).
|
|
|
823 */
|
|
|
824 if (number > 0)
|
|
|
825 scroll = number;
|
|
|
826 cmd_exec();
|
|
|
827 forward(scroll, 0, 0);
|
|
|
828 break;
|
|
|
829
|
|
|
830 case A_B_SCROLL:
|
|
|
831 /*
|
|
|
832 * Forward N lines
|
|
|
833 * (default same as last 'd' or 'u' command).
|
|
|
834 */
|
|
|
835 if (number > 0)
|
|
|
836 scroll = number;
|
|
|
837 cmd_exec();
|
|
|
838 backward(scroll, 0, 0);
|
|
|
839 break;
|
|
|
840
|
|
|
841 case A_FREPAINT:
|
|
|
842 /*
|
|
|
843 * Flush buffers, then repaint screen.
|
|
|
844 * Don't flush the buffers on a pipe!
|
|
|
845 */
|
|
|
846 ch_flush();
|
|
|
847 if (!ispipe)
|
|
|
848 clr_linenum();
|
|
|
849 /* FALLTHRU */
|
|
|
850 case A_REPAINT:
|
|
|
851 /*
|
|
|
852 * Repaint screen.
|
|
|
853 */
|
|
|
854 cmd_exec();
|
|
|
855 repaint();
|
|
|
856 break;
|
|
|
857
|
|
|
858 case A_GOLINE:
|
|
|
859 /*
|
|
|
860 * Go to line N, default beginning of file.
|
|
|
861 */
|
|
|
862 if (number <= 0)
|
|
|
863 number = 1;
|
|
|
864 cmd_exec();
|
|
|
865 jump_back(number);
|
|
|
866 break;
|
|
|
867
|
|
|
868 case A_PERCENT:
|
|
|
869 /*
|
|
|
870 * Go to a specified percentage into the file.
|
|
|
871 */
|
|
|
872 if (number < 0)
|
|
|
873 number = 0;
|
|
|
874 if (number > 100)
|
|
|
875 number = 100;
|
|
|
876 cmd_exec();
|
|
|
877 jump_percent(number);
|
|
|
878 break;
|
|
|
879
|
|
|
880 case A_GOEND:
|
|
|
881 /*
|
|
|
882 * Go to line N, default end of file.
|
|
|
883 */
|
|
|
884 cmd_exec();
|
|
|
885 if (number <= 0)
|
|
|
886 jump_forw();
|
|
|
887 else
|
|
|
888 jump_back(number);
|
|
|
889 break;
|
|
|
890
|
|
|
891 case A_GOPOS:
|
|
|
892 /*
|
|
|
893 * Go to a specified byte position in the file.
|
|
|
894 */
|
|
|
895 cmd_exec();
|
|
|
896 if (number < 0)
|
|
|
897 number = 0;
|
|
|
898 jump_line_loc((POSITION)number, jump_sline);
|
|
|
899 break;
|
|
|
900
|
|
|
901 case A_STAT:
|
|
|
902 /*
|
|
|
903 * Print file name, etc.
|
|
|
904 */
|
|
|
905 cmd_exec();
|
|
|
906 parg.p_string = eq_message();
|
|
|
907 error("%s", &parg);
|
|
|
908 break;
|
|
|
909
|
|
|
910 case A_VERSION:
|
|
|
911 /*
|
|
|
912 * Print version number, without the "@(#)".
|
|
|
913 */
|
|
|
914 cmd_exec();
|
|
|
915 parg.p_string = version+4;
|
|
|
916 error("%s", &parg);
|
|
|
917 break;
|
|
|
918
|
|
|
919 case A_QUIT:
|
|
|
920 /*
|
|
|
921 * Exit.
|
|
|
922 */
|
|
|
923 quit(0);
|
|
|
924
|
|
|
925 /*
|
|
|
926 * Define abbreviation for a commonly used sequence below.
|
|
|
927 */
|
|
|
928 #define DO_SEARCH() if (number <= 0) number = 1; \
|
|
|
929 mca_search(); \
|
|
|
930 cmd_exec(); \
|
|
|
931 multi_search((char *)NULL, number);
|
|
|
932
|
|
|
933
|
|
|
934 case A_F_SEARCH:
|
|
|
935 /*
|
|
|
936 * Search forward for a pattern.
|
|
|
937 * Get the first char of the pattern.
|
|
|
938 */
|
|
|
939 search_type = SRCH_FORW;
|
|
|
940 if (number <= 0)
|
|
|
941 number = 1;
|
|
|
942 mca_search();
|
|
|
943 c = getcc();
|
|
|
944 goto again;
|
|
|
945
|
|
|
946 case A_B_SEARCH:
|
|
|
947 /*
|
|
|
948 * Search backward for a pattern.
|
|
|
949 * Get the first char of the pattern.
|
|
|
950 */
|
|
|
951 search_type = SRCH_BACK;
|
|
|
952 if (number <= 0)
|
|
|
953 number = 1;
|
|
|
954 mca_search();
|
|
|
955 c = getcc();
|
|
|
956 goto again;
|
|
|
957
|
|
|
958 case A_AGAIN_SEARCH:
|
|
|
959 /*
|
|
|
960 * Repeat previous search.
|
|
|
961 */
|
|
|
962 DO_SEARCH();
|
|
|
963 break;
|
|
|
964
|
|
|
965 case A_T_AGAIN_SEARCH:
|
|
|
966 /*
|
|
|
967 * Repeat previous search, multiple files.
|
|
|
968 */
|
|
|
969 search_type |= SRCH_PAST_EOF;
|
|
|
970 DO_SEARCH();
|
|
|
971 break;
|
|
|
972
|
|
|
973 case A_REVERSE_SEARCH:
|
|
|
974 /*
|
|
|
975 * Repeat previous search, in reverse direction.
|
|
|
976 */
|
|
|
977 save_search_type = search_type;
|
|
|
978 search_type = SRCH_REVERSE(search_type);
|
|
|
979 DO_SEARCH();
|
|
|
980 search_type = save_search_type;
|
|
|
981 break;
|
|
|
982
|
|
|
983 case A_T_REVERSE_SEARCH:
|
|
|
984 /*
|
|
|
985 * Repeat previous search,
|
|
|
986 * multiple files in reverse direction.
|
|
|
987 */
|
|
|
988 save_search_type = search_type;
|
|
|
989 search_type = SRCH_REVERSE(search_type);
|
|
|
990 search_type |= SRCH_PAST_EOF;
|
|
|
991 DO_SEARCH();
|
|
|
992 search_type = save_search_type;
|
|
|
993 break;
|
|
|
994
|
|
|
995 case A_HELP:
|
|
|
996 /*
|
|
|
997 * Help.
|
|
|
998 */
|
|
|
999 if (nohelp)
|
|
|
1000 {
|
|
|
1001 bell();
|
|
|
1002 break;
|
|
|
1003 }
|
|
|
1004 lower_left();
|
|
|
1005 clear_eol();
|
|
|
1006 putstr("help");
|
|
|
1007 cmd_exec();
|
|
|
1008 help();
|
|
|
1009 break;
|
|
|
1010
|
|
|
1011 case A_EXAMINE:
|
|
|
1012 /*
|
|
|
1013 * Edit a new file. Get the filename.
|
|
|
1014 */
|
|
|
1015 start_mca(A_EXAMINE, "Examine: ");
|
|
|
1016 c = getcc();
|
|
|
1017 goto again;
|
|
|
1018
|
|
|
1019 case A_VISUAL:
|
|
|
1020 /*
|
|
|
1021 * Invoke an editor on the input file.
|
|
|
1022 */
|
|
|
1023 #if EDITOR
|
|
|
1024 if (strcmp(get_filename(curr_ifile), "-") == 0)
|
|
|
1025 {
|
|
|
1026 error("Cannot edit standard input", NULL_PARG);
|
|
|
1027 break;
|
|
|
1028 }
|
|
|
1029 /*
|
|
|
1030 * Expand the editor prototype string
|
|
|
1031 * and pass it to the system to execute.
|
|
|
1032 */
|
|
|
1033 cmd_exec();
|
|
|
1034 lsystem(pr_expand(editproto, 0));
|
|
|
1035 /*
|
|
|
1036 * Re-edit the file, since data may have changed.
|
|
|
1037 * Some editors even recreate the file, so flushing
|
|
|
1038 * buffers is not sufficient.
|
|
|
1039 */
|
|
|
1040 (void) edit(get_filename(curr_ifile), 0);
|
|
|
1041 break;
|
|
|
1042 #else
|
|
|
1043 error("Command not available", NULL_PARG);
|
|
|
1044 break;
|
|
|
1045 #endif
|
|
|
1046
|
|
|
1047 case A_NEXT_FILE:
|
|
|
1048 /*
|
|
|
1049 * Examine next file.
|
|
|
1050 */
|
|
|
1051 if (number <= 0)
|
|
|
1052 number = 1;
|
|
|
1053 if (edit_next(number))
|
|
|
1054 {
|
|
|
1055 if (quit_at_eof && hit_eof)
|
|
|
1056 quit(0);
|
|
|
1057 parg.p_string = (number > 1) ? "(N-th) " : "";
|
|
|
1058 error("No %snext file", &parg);
|
|
|
1059 }
|
|
|
1060 break;
|
|
|
1061
|
|
|
1062 case A_PREV_FILE:
|
|
|
1063 /*
|
|
|
1064 * Examine previous file.
|
|
|
1065 */
|
|
|
1066 if (number <= 0)
|
|
|
1067 number = 1;
|
|
|
1068 if (edit_prev(number))
|
|
|
1069 {
|
|
|
1070 parg.p_string = (number > 1) ? "(N-th) " : "";
|
|
|
1071 error("No %sprevious file", &parg);
|
|
|
1072 }
|
|
|
1073 break;
|
|
|
1074
|
|
|
1075 case A_INDEX_FILE:
|
|
|
1076 /*
|
|
|
1077 * Examine a particular file.
|
|
|
1078 */
|
|
|
1079 if (number <= 0)
|
|
|
1080 number = 1;
|
|
|
1081 if (edit_index(number))
|
|
|
1082 error("No such file", NULL_PARG);
|
|
|
1083 break;
|
|
|
1084
|
|
|
1085 case A_OPT_TOGGLE:
|
|
|
1086 start_mca(A_OPT_TOGGLE, "-");
|
|
|
1087 optflag = OPT_TOGGLE;
|
|
|
1088 c = getcc();
|
|
|
1089 goto again;
|
|
|
1090
|
|
|
1091 case A_DISP_OPTION:
|
|
|
1092 /*
|
|
|
1093 * Report a flag setting.
|
|
|
1094 */
|
|
|
1095 start_mca(A_DISP_OPTION, "_");
|
|
|
1096 c = getcc();
|
|
|
1097 if (c == erase_char || c == kill_char)
|
|
|
1098 break;
|
|
|
1099 toggle_option(c, "", OPT_NO_TOGGLE);
|
|
|
1100 break;
|
|
|
1101
|
|
|
1102 case A_FIRSTCMD:
|
|
|
1103 /*
|
|
|
1104 * Set an initial command for new files.
|
|
|
1105 */
|
|
|
1106 start_mca(A_FIRSTCMD, "+");
|
|
|
1107 c = getcc();
|
|
|
1108 goto again;
|
|
|
1109
|
|
|
1110 case A_SHELL:
|
|
|
1111 /*
|
|
|
1112 * Shell escape.
|
|
|
1113 */
|
|
|
1114 #if SHELL_ESCAPE
|
|
|
1115 start_mca(A_SHELL, "!");
|
|
|
1116 c = getcc();
|
|
|
1117 goto again;
|
|
|
1118 #else
|
|
|
1119 error("Command not available", NULL_PARG);
|
|
|
1120 break;
|
|
|
1121 #endif
|
|
|
1122
|
|
|
1123 case A_SETMARK:
|
|
|
1124 /*
|
|
|
1125 * Set a mark.
|
|
|
1126 */
|
|
|
1127 start_mca(A_SETMARK, "mark: ");
|
|
|
1128 c = getcc();
|
|
|
1129 if (c == erase_char || c == kill_char ||
|
|
|
1130 c == '\n' || c == '\r')
|
|
|
1131 break;
|
|
|
1132 setmark(c);
|
|
|
1133 break;
|
|
|
1134
|
|
|
1135 case A_GOMARK:
|
|
|
1136 /*
|
|
|
1137 * Go to a mark.
|
|
|
1138 */
|
|
|
1139 start_mca(A_GOMARK, "goto mark: ");
|
|
|
1140 c = getcc();
|
|
|
1141 if (c == erase_char || c == kill_char ||
|
|
|
1142 c == '\n' || c == '\r')
|
|
|
1143 break;
|
|
|
1144 gomark(c);
|
|
|
1145 break;
|
|
|
1146
|
|
|
1147 #if PIPEC
|
|
|
1148 case A_PIPE:
|
|
|
1149 start_mca(A_PIPE, "|mark: ");
|
|
|
1150 c = getcc();
|
|
|
1151 if (c == erase_char || c == kill_char)
|
|
|
1152 break;
|
|
|
1153 if (c == '\n' || c == '\r')
|
|
|
1154 c = '.';
|
|
|
1155 if (badmark(c))
|
|
|
1156 break;
|
|
|
1157 pipec = c;
|
|
|
1158 start_mca(A_PIPE, "!");
|
|
|
1159 c = getcc();
|
|
|
1160 goto again;
|
|
|
1161 #endif
|
|
|
1162
|
|
|
1163 case A_B_BRACKET:
|
|
|
1164 case A_F_BRACKET:
|
|
|
1165 start_mca(action, "Brackets: ");
|
|
|
1166 c = getcc();
|
|
|
1167 goto again;
|
|
|
1168
|
|
|
1169 case A_PREFIX:
|
|
|
1170 /*
|
|
|
1171 * The command is incomplete (more chars are needed).
|
|
|
1172 * Display the current char, so the user knows
|
|
|
1173 * what's going on, and get another character.
|
|
|
1174 */
|
|
|
1175 if (mca != A_PREFIX)
|
|
|
1176 {
|
|
|
1177 start_mca(A_PREFIX, " ");
|
|
|
1178 cmd_reset();
|
|
|
1179 (void) cmd_char(c);
|
|
|
1180 }
|
|
|
1181 c = getcc();
|
|
|
1182 goto again;
|
|
|
1183
|
|
|
1184 case A_NOACTION:
|
|
|
1185 break;
|
|
|
1186
|
|
|
1187 default:
|
|
|
1188 bell();
|
|
|
1189 break;
|
|
|
1190 }
|
|
|
1191 }
|
|
|
1192 }
|
