inject_csi.c

   1 /*
   2 LICENSE INFORMATION:
   3 This program is free software; you can redistribute it and/or
   4 modify it under the terms of the GNU Lesser General Public
   5 License (LGPL) as published by the Free Software Foundation.
   6
   7 Please refer to the COPYING file for more information.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 General Public License for more details.
  13
  14 You should have received a copy of the GNU Lesser General Public
  15 License along with this program; if not, write to the Free Software
  16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17
  18 Copyright (c) 2004 Bruno T. C. de Oliveira
  19 */
  20
  21 #include "utf8.h"
  22 #include "inject_csi.h"
  23 #include "roteprivate.h"
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <stdbool.h>
  27 #include <stdio.h>
  28
  29 #define MAX_CSI_ES_PARAMS 32
  30
  31 /* interprets a 'set attribute' (SGR) CSI escape sequence */
  32 static void interpret_csi_SGR(RoteTerm *rt, int param[], int pcount) {
  33    int i;
  34
  35    if (pcount == 0) {
  36       /* special case: reset attributes */
  37       rt->curattr = 0x70;
  38       return;
  39    }
  40
  41    for (i = 0; i < pcount; i++) {
  42
  43 // From http://vt100.net/docs/vt510-rm/SGR table 5-16
  44 // 0    All attributes off
  45 // 1    Bold
  46 // 4    Underline
  47 // 5    Blinking
  48 // 7    Negative image
  49 // 8    Invisible image
  50 // 10   The ASCII character set is the current 7-bit
  51 //      display character set (default) - SCO Console only.
  52 // 11   Map Hex 00-7F of the PC character set codes
  53 //      to the current 7-bit display character set
  54 //      - SCO Console only.
  55 // 12   Map Hex 80-FF of the current character set to
  56 //      the current 7-bit display character set - SCO
  57 //      Console only.
  58 // 22   Bold off
  59 // 24   Underline off
  60 // 25   Blinking off
  61 // 27   Negative image off
  62 // 28   Invisible image off
  63
  64       if (param[i] == 0) rt->curattr = 0x70;
  65       else if (param[i] == 1 || param[i] == 2 || param[i] == 4)  /* set bold */
  66          ROTE_ATTR_MOD_BOLD(rt->curattr,1);
  67       else if (param[i] == 5)  /* set blink */
  68          ROTE_ATTR_MOD_BLINK(rt->curattr,1);
  69       else if (param[i] == 7 || param[i] == 27) { /* reverse video */
  70         int fg = ROTE_ATTR_FG(rt->curattr);
  71         int bg = ROTE_ATTR_BG(rt->curattr);
  72         ROTE_ATTR_MOD_FG(rt->curattr, bg);
  73         ROTE_ATTR_MOD_BG(rt->curattr, fg);
  74       }
  75       else if (param[i] == 8) rt->curattr = 0x0;    /* invisible */
  76       else if (param[i] == 22 || param[i] == 24) /* bold off */
  77         ROTE_ATTR_MOD_BOLD(rt->curattr,0);
  78       else if (param[i] == 25) /* blink off */
  79         ROTE_ATTR_MOD_BLINK(rt->curattr,0);
  80       else if (param[i] == 28) /* invisible off */
  81         rt->curattr = 0x70;
  82       else if (param[i] >= 30 && param[i] <= 37)    /* set fg */
  83          ROTE_ATTR_MOD_FG(rt->curattr, param[i] - 30);
  84       else if (param[i] >= 40 && param[i] <= 47)    /* set bg */
  85          ROTE_ATTR_MOD_BG(rt->curattr, param[i] - 40);
  86       else if (param[i] == 39)  /* reset foreground to default */
  87          ROTE_ATTR_MOD_FG(rt->curattr, 7);
  88       else if (param[i] == 49)  /* reset background to default */
  89          ROTE_ATTR_MOD_BG(rt->curattr, 0);
  90    }
  91 }
  92
  93 /* interprets an 'erase display' (ED) escape sequence */
  94 static void interpret_csi_ED(RoteTerm *rt, int param[], int pcount) {
  95    int r, c;
  96    int start_row, start_col, end_row, end_col;
  97
  98    /* decide range */
  99    if (pcount && param[0] == 2)
 100                       start_row = 0, start_col = 0, end_row = rt->rows - 1,
 101                       end_col = rt->cols - 1;
 102
 103    else if (pcount && param[0] == 1)
 104                       start_row = 0, start_col = 0, end_row = rt->crow,
 105                       end_col = rt->ccol;
 106
 107    else start_row = rt->crow, start_col = rt->ccol,
 108         end_row = rt->rows - 1, end_col = rt->cols - 1;
 109
 110    /* clean range */
 111    for (r = start_row; r <= end_row; r++) {
 112       rt->line_dirty[r] = true;
 113
 114       for (c = (r == start_row ? start_col : 0);
 115                              c <= (r == end_row ? end_col : rt->cols - 1);
 116                              c++) {
 117          rt->cells[r][c].ch = 0x20;
 118          rt->cells[r][c].attr = rt->curattr;
 119       }
 120    }
 121 }
 122
 123 /* interprets a 'move cursor' (CUP) escape sequence */
 124 static void interpret_csi_CUP(RoteTerm *rt, int param[], int pcount) {
 125    if (pcount == 0) {
 126       /* special case */
 127       rt->crow = rt->ccol = 0;
 128       return;
 129    }
 130    else if (pcount < 2) return;  /* malformed */
 131
 132    rt->crow = param[0] - 1;  /* convert from 1-based to 0-based */
 133    rt->ccol = param[1] - 1;  /* convert from 1-based to 0-based */
 134
 135    rt->curpos_dirty = true;
 136
 137    clamp_cursor_to_bounds(rt);
 138 }
 139
 140 /* Interpret the 'relative mode' sequences: CUU, CUD, CUF, CUB, CNL,
 141  * CPL, CHA, HPR, VPA, VPR, HPA */
 142 static void interpret_csi_C(RoteTerm *rt, char verb,
 143                                                 int param[], int pcount) {
 144    int n = (pcount && param[0] > 0) ? param[0] : 1;
 145
 146    switch (verb) {
 147       case 'A':           rt->crow -= n; break;
 148       case 'B': case 'e': rt->crow += n; break;
 149       case 'C': case 'a': rt->ccol += n; break;
 150       case 'D':           rt->ccol -= n; break;
 151       case 'E':           rt->crow += n; rt->ccol = 0; break;
 152       case 'F':           rt->crow -= n; rt->ccol = 0; break;
 153       case 'G': case '`': rt->ccol  = param[0] - 1; break;
 154       case 'd':           rt->crow  = param[0] - 1; break;
 155    }
 156
 157    rt->curpos_dirty = true;
 158    clamp_cursor_to_bounds(rt);
 159 }
 160
 161 /* Interpret the 'erase line' escape sequence */
 162 static void interpret_csi_EL(RoteTerm *rt, int param[], int pcount) {
 163    int erase_start, erase_end, i;
 164    int cmd = pcount ? param[0] : 0;
 165
 166    switch (cmd) {
 167       case 1:  erase_start = 0;           erase_end = rt->ccol;     break;
 168       case 2:  erase_start = 0;           erase_end = rt->cols - 1; break;
 169       default: erase_start = rt->ccol;    erase_end = rt->cols - 1; break;
 170    }
 171
 172    for (i = erase_start; i <= erase_end; i++) {
 173       rt->cells[rt->crow][i].ch = 0x20;
 174       rt->cells[rt->crow][i].attr = rt->curattr;
 175    }
 176
 177    rt->line_dirty[rt->crow] = true;
 178 }
 179
 180 /* Interpret the 'insert blanks' sequence (ICH) */
 181 static void interpret_csi_ICH(RoteTerm *rt, int param[], int pcount) {
 182    int n = (pcount && param[0] > 0) ? param[0] : 1;
 183    int i;
 184    for (i = rt->cols - 1; i >= rt->ccol + n; i--)
 185       rt->cells[rt->crow][i] = rt->cells[rt->crow][i - n];
 186    for (i = rt->ccol; i < rt->ccol + n; i++) {
 187       rt->cells[rt->crow][i].ch = 0x20;
 188       rt->cells[rt->crow][i].attr = rt->curattr;
 189    }
 190
 191    rt->line_dirty[rt->crow] = true;
 192 }
 193
 194 /* Interpret the 'delete chars' sequence (DCH) */
 195 static void interpret_csi_DCH(RoteTerm *rt, int param[], int pcount) {
 196    int n = (pcount && param[0] > 0) ? param[0] : 1;
 197    int i;
 198    for (i = rt->ccol; i < rt->cols; i++) {
 199      if (i + n < rt->cols)
 200          rt->cells[rt->crow][i] = rt->cells[rt->crow][i + n];
 201      else {
 202          rt->cells[rt->crow][i].ch = 0x20;
 203          rt->cells[rt->crow][i].attr = rt->curattr;
 204      }
 205    }
 206
 207    rt->line_dirty[rt->crow] = true;
 208 }
 209
 210 /* Interpret an 'insert line' sequence (IL) */
 211 static void interpret_csi_IL(RoteTerm *rt, int param[], int pcount) {
 212    int n = (pcount && param[0] > 0) ? param[0] : 1;
 213    int i, j;
 214
 215    for (i = rt->pd->scrollbottom; i >= rt->crow + n; i--)
 216       memcpy(rt->cells[i], rt->cells[i - n], sizeof(RoteCell) * rt->cols);
 217
 218    for (i = rt->crow; i < rt->crow + n && i <= rt->pd->scrollbottom; i++) {
 219       rt->line_dirty[i] = true;
 220       for (j = 0; j < rt->cols; j++)
 221          rt->cells[i][j].ch = 0x20, rt->cells[i][j].attr = rt->curattr;
 222    }
 223
 224 }
 225
 226 /* Interpret a 'delete line' sequence (DL) */
 227 static void interpret_csi_DL(RoteTerm *rt, int param[], int pcount) {
 228    int n = (pcount && param[0] > 0) ? param[0] : 1;
 229    int i, j;
 230
 231    for (i = rt->crow; i <= rt->pd->scrollbottom; i++) {
 232       rt->line_dirty[i] = true;
 233       if (i + n <= rt->pd->scrollbottom)
 234          memcpy(rt->cells[i], rt->cells[i+n], sizeof(RoteCell) * rt->cols);
 235       else {
 236          for (j = 0; j < rt->cols; j++)
 237             rt->cells[i][j].ch = 0x20, rt->cells[i][j].attr = rt->curattr;
 238       }
 239    }
 240 }
 241
 242 /* Interpret an 'erase characters' (ECH) sequence */
 243 static void interpret_csi_ECH(RoteTerm *rt, int param[], int pcount) {
 244    int n = (pcount && param[0] > 0) ? param[0] : 1;
 245    int i;
 246
 247    for (i = rt->ccol; i < rt->ccol + n && i < rt->cols; i++) {
 248       rt->cells[rt->crow][i].ch = 0x20;
 249       rt->cells[rt->crow][i].attr = rt->curattr;
 250    }
 251
 252    rt->line_dirty[rt->crow] = true;
 253 }
 254
 255 /* Interpret a 'set scrolling region' (DECSTBM) sequence */
 256 static void interpret_csi_DECSTBM(RoteTerm *rt, int param[], int pcount) {
 257    int newtop, newbottom;
 258
 259    if (!pcount) {
 260       newtop = 0;
 261       newbottom = rt->rows - 1;
 262    }
 263    else if (pcount < 2) return; /* malformed */
 264    else {
 265       newtop = param[0] - 1;
 266       newbottom = param[1] - 1;
 267    }
 268
 269    /* clamp to bounds */
 270    if (newtop < 0) newtop = 0;
 271    if (newtop >= rt->rows) newtop = rt->rows - 1;
 272    if (newbottom < 0) newbottom = 0;
 273    if (newbottom >= rt->rows) newbottom = rt->rows - 1;
 274
 275    /* check for range validity */
 276    if (newtop > newbottom) return;
 277    rt->pd->scrolltop = newtop;
 278    rt->pd->scrollbottom = newbottom;
 279 }
 280
 281 static void interpret_csi_SAVECUR(RoteTerm *rt, int param[], int pcount) {
 282    rt->pd->saved_x = rt->ccol;
 283    rt->pd->saved_y = rt->crow;
 284 }
 285
 286 static void interpret_csi_RESTORECUR(RoteTerm *rt, int param[], int pcount) {
 287    rt->ccol = rt->pd->saved_x;
 288    rt->crow = rt->pd->saved_y;
 289    rt->curpos_dirty = true;
 290 }
 291
 292 void rote_es_interpret_csi(RoteTerm *rt) {
 293    static int csiparam[MAX_CSI_ES_PARAMS];
 294    int param_count = 0;
 295    const char *p = rt->pd->esbuf + 1;
 296    char verb = rt->pd->esbuf[rt->pd->esbuf_len - 1];
 297
 298    if (!strncmp(rt->pd->esbuf, "[?", 2)) { /* private-mode CSI, ignore */
 299       #ifdef DEBUG
 300       fprintf(stderr, "Ignoring private-mode CSI: <%s>\n", rt->pd->esbuf);
 301       #endif
 302       return;
 303    }
 304
 305    /* parse numeric parameters */
 306    while ((*p >= '0' && *p <= '9') || *p == ';') {
 307       if (*p == ';') {
 308          if (param_count >= MAX_CSI_ES_PARAMS) return; /* too long! */
 309          csiparam[param_count++] = 0;
 310       }
 311       else {
 312          if (param_count == 0) csiparam[param_count++] = 0;
 313          csiparam[param_count - 1] *= 10;
 314          csiparam[param_count - 1] += *p - '0';
 315       }
 316
 317       p++;
 318    }
 319
 320    /* delegate handling depending on command character (verb) */
 321    switch (verb) {
 322       case 'h':
 323           if (param_count == 1 && csiparam[0] == 4) /* insert mode */
 324               rt->insert = true;
 325           break;
 326       case 'l':
 327           if (param_count == 1 && csiparam[0] == 4) /* replace mode */
 328               rt->insert = false;
 329           break;
 330       case 'm': /* it's a 'set attribute' sequence */
 331          interpret_csi_SGR(rt, csiparam, param_count); break;
 332       case 'J': /* it's an 'erase display' sequence */
 333          interpret_csi_ED(rt, csiparam, param_count); break;
 334       case 'H': case 'f': /* it's a 'move cursor' sequence */
 335          interpret_csi_CUP(rt, csiparam, param_count); break;
 336       case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G':
 337       case 'e': case 'a': case 'd': case '`':
 338          /* it is a 'relative move' */
 339          interpret_csi_C(rt, verb, csiparam, param_count); break;
 340       case 'K': /* erase line */
 341          interpret_csi_EL(rt, csiparam, param_count); break;
 342       case '@': /* insert characters */
 343          interpret_csi_ICH(rt, csiparam, param_count); break;
 344       case 'P': /* delete characters */
 345          interpret_csi_DCH(rt, csiparam, param_count); break;
 346       case 'L': /* insert lines */
 347          interpret_csi_IL(rt, csiparam, param_count); break;
 348       case 'M': /* delete lines */
 349          interpret_csi_DL(rt, csiparam, param_count); break;
 350       case 'X': /* erase chars */
 351          interpret_csi_ECH(rt, csiparam, param_count); break;
 352       case 'r': /* set scrolling region */
 353          interpret_csi_DECSTBM(rt, csiparam, param_count); break;
 354       case 's': /* save cursor location */
 355          interpret_csi_SAVECUR(rt, csiparam, param_count); break;
 356       case 'u': /* restore cursor location */
 357          interpret_csi_RESTORECUR(rt, csiparam, param_count); break;
 358       default:
 359          #ifdef DEBUG
 360          fprintf(stderr, "Unrecogized CSI: verb=%c <%s>\n",
 361                  verb, rt->pd->esbuf);
 362          #endif
 363          break;
 364    }
 365 }
 366