clients/terminal.c

   1 /*
   2  * Copyright © 2008 Kristian Høgsberg
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that copyright
   7  * notice and this permission notice appear in supporting documentation, and
   8  * that the name of the copyright holders not be used in advertising or
   9  * publicity pertaining to distribution of the software without specific,
  10  * written prior permission.  The copyright holders make no representations
  11  * about the suitability of this software for any purpose.  It is provided "as
  12  * is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  20  * OF THIS SOFTWARE.
  21  */
  22
  23 #include <stdbool.h>
  24 #include <stdint.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <fcntl.h>
  29 #include <unistd.h>
  30 #include <math.h>
  31 #include <time.h>
  32 #include <pty.h>
  33 #include <ctype.h>
  34 #include <cairo.h>
  35 #include <sys/epoll.h>
  36
  37 #include <wayland-client.h>
  38
  39 #include "../shared/config-parser.h"
  40 #include "window.h"
  41
  42 static int option_fullscreen;
  43 static char *option_font = "mono";
  44 static int option_font_size = 14;
  45 static char *option_term = "xterm";
  46 static char *option_shell;
  47
  48 static struct wl_list terminal_list;
  49
  50 static struct terminal *
  51 terminal_create(struct display *display);
  52 static void
  53 terminal_destroy(struct terminal *terminal);
  54 static int
  55 terminal_run(struct terminal *terminal, const char *path);
  56
  57 #define MOD_SHIFT       0x01
  58 #define MOD_ALT         0x02
  59 #define MOD_CTRL        0x04
  60
  61 #define ATTRMASK_BOLD           0x01
  62 #define ATTRMASK_UNDERLINE      0x02
  63 #define ATTRMASK_BLINK          0x04
  64 #define ATTRMASK_INVERSE        0x08
  65 #define ATTRMASK_CONCEALED      0x10
  66
  67 /* Buffer sizes */
  68 #define MAX_RESPONSE            256
  69 #define MAX_ESCAPE              255
  70
  71 /* Terminal modes */
  72 #define MODE_SHOW_CURSOR        0x00000001
  73 #define MODE_INVERSE            0x00000002
  74 #define MODE_AUTOWRAP           0x00000004
  75 #define MODE_AUTOREPEAT         0x00000008
  76 #define MODE_LF_NEWLINE         0x00000010
  77 #define MODE_IRM                0x00000020
  78 #define MODE_DELETE_SENDS_DEL   0x00000040
  79 #define MODE_ALT_SENDS_ESC      0x00000080
  80
  81 union utf8_char {
  82         unsigned char byte[4];
  83         uint32_t ch;
  84 };
  85
  86 enum utf8_state {
  87         utf8state_start,
  88         utf8state_accept,
  89         utf8state_reject,
  90         utf8state_expect3,
  91         utf8state_expect2,
  92         utf8state_expect1
  93 };
  94
  95 struct utf8_state_machine {
  96         enum utf8_state state;
  97         int len;
  98         union utf8_char s;
  99 };
 100
 101 static void
 102 init_state_machine(struct utf8_state_machine *machine)
 103 {
 104         machine->state = utf8state_start;
 105         machine->len = 0;
 106         machine->s.ch = 0;
 107 }
 108
 109 static enum utf8_state
 110 utf8_next_char(struct utf8_state_machine *machine, unsigned char c)
 111 {
 112         switch(machine->state) {
 113         case utf8state_start:
 114         case utf8state_accept:
 115         case utf8state_reject:
 116                 machine->s.ch = 0;
 117                 machine->len = 0;
 118                 if(c == 0xC0 || c == 0xC1) {
 119                         /* overlong encoding, reject */
 120                         machine->state = utf8state_reject;
 121                 } else if((c & 0x80) == 0) {
 122                         /* single byte, accept */
 123                         machine->s.byte[machine->len++] = c;
 124                         machine->state = utf8state_accept;
 125                 } else if((c & 0xC0) == 0x80) {
 126                         /* parser out of sync, ignore byte */
 127                         machine->state = utf8state_start;
 128                 } else if((c & 0xE0) == 0xC0) {
 129                         /* start of two byte sequence */
 130                         machine->s.byte[machine->len++] = c;
 131                         machine->state = utf8state_expect1;
 132                 } else if((c & 0xF0) == 0xE0) {
 133                         /* start of three byte sequence */
 134                         machine->s.byte[machine->len++] = c;
 135                         machine->state = utf8state_expect2;
 136                 } else if((c & 0xF8) == 0xF0) {
 137                         /* start of four byte sequence */
 138                         machine->s.byte[machine->len++] = c;
 139                         machine->state = utf8state_expect3;
 140                 } else {
 141                         /* overlong encoding, reject */
 142                         machine->state = utf8state_reject;
 143                 }
 144                 break;
 145         case utf8state_expect3:
 146                 machine->s.byte[machine->len++] = c;
 147                 if((c & 0xC0) == 0x80) {
 148                         /* all good, continue */
 149                         machine->state = utf8state_expect2;
 150                 } else {
 151                         /* missing extra byte, reject */
 152                         machine->state = utf8state_reject;
 153                 }
 154                 break;
 155         case utf8state_expect2:
 156                 machine->s.byte[machine->len++] = c;
 157                 if((c & 0xC0) == 0x80) {
 158                         /* all good, continue */
 159                         machine->state = utf8state_expect1;
 160                 } else {
 161                         /* missing extra byte, reject */
 162                         machine->state = utf8state_reject;
 163                 }
 164                 break;
 165         case utf8state_expect1:
 166                 machine->s.byte[machine->len++] = c;
 167                 if((c & 0xC0) == 0x80) {
 168                         /* all good, accept */
 169                         machine->state = utf8state_accept;
 170                 } else {
 171                         /* missing extra byte, reject */
 172                         machine->state = utf8state_reject;
 173                 }
 174                 break;
 175         default:
 176                 machine->state = utf8state_reject;
 177                 break;
 178         }
 179
 180         return machine->state;
 181 }
 182
 183 struct char_sub {
 184         union utf8_char match;
 185         union utf8_char replace;
 186 };
 187 /* Set last char_sub match to NULL char */
 188 typedef struct char_sub *character_set;
 189
 190 struct char_sub CS_US[] = {
 191         {{{0, }}, {{0, }}}
 192 };
 193 static struct char_sub CS_UK[] = {
 194         {{{'#', 0, }}, {{0xC2, 0xA3, 0, }}}, /* POUND: £ */
 195         {{{0, }}, {{0, }}}
 196 };
 197 static struct char_sub CS_SPECIAL[] = {
 198         {{{'`', 0, }}, {{0xE2, 0x99, 0xA6, 0}}}, /* diamond: ♦ */
 199         {{{'a', 0, }}, {{0xE2, 0x96, 0x92, 0}}}, /* 50% cell: ▒ */
 200         {{{'b', 0, }}, {{0xE2, 0x90, 0x89, 0}}}, /* HT: ␉ */
 201         {{{'c', 0, }}, {{0xE2, 0x90, 0x8C, 0}}}, /* FF: ␌ */
 202         {{{'d', 0, }}, {{0xE2, 0x90, 0x8D, 0}}}, /* CR: ␍ */
 203         {{{'e', 0, }}, {{0xE2, 0x90, 0x8A, 0}}}, /* LF: ␊ */
 204         {{{'f', 0, }}, {{0xC2, 0xB0, 0, }}}, /* Degree: ° */
 205         {{{'g', 0, }}, {{0xC2, 0xB1, 0, }}}, /* Plus/Minus: ± */
 206         {{{'h', 0, }}, {{0xE2, 0x90, 0xA4, 0}}}, /* NL: ␤ */
 207         {{{'i', 0, }}, {{0xE2, 0x90, 0x8B, 0}}}, /* VT: ␋ */
 208         {{{'j', 0, }}, {{0xE2, 0x94, 0x98, 0}}}, /* CN_RB: ┘ */
 209         {{{'k', 0, }}, {{0xE2, 0x94, 0x90, 0}}}, /* CN_RT: ┐ */
 210         {{{'l', 0, }}, {{0xE2, 0x94, 0x8C, 0}}}, /* CN_LT: ┌ */
 211         {{{'m', 0, }}, {{0xE2, 0x94, 0x94, 0}}}, /* CN_LB: └ */
 212         {{{'n', 0, }}, {{0xE2, 0x94, 0xBC, 0}}}, /* CROSS: ┼ */
 213         {{{'o', 0, }}, {{0xE2, 0x8E, 0xBA, 0}}}, /* Horiz. Scan Line 1: ⎺ */
 214         {{{'p', 0, }}, {{0xE2, 0x8E, 0xBB, 0}}}, /* Horiz. Scan Line 3: ⎻ */
 215         {{{'q', 0, }}, {{0xE2, 0x94, 0x80, 0}}}, /* Horiz. Scan Line 5: ─ */
 216         {{{'r', 0, }}, {{0xE2, 0x8E, 0xBC, 0}}}, /* Horiz. Scan Line 7: ⎼ */
 217         {{{'s', 0, }}, {{0xE2, 0x8E, 0xBD, 0}}}, /* Horiz. Scan Line 9: ⎽ */
 218         {{{'t', 0, }}, {{0xE2, 0x94, 0x9C, 0}}}, /* TR: ├ */
 219         {{{'u', 0, }}, {{0xE2, 0x94, 0xA4, 0}}}, /* TL: ┤ */
 220         {{{'v', 0, }}, {{0xE2, 0x94, 0xB4, 0}}}, /* TU: ┴ */
 221         {{{'w', 0, }}, {{0xE2, 0x94, 0xAC, 0}}}, /* TD: ┬ */
 222         {{{'x', 0, }}, {{0xE2, 0x94, 0x82, 0}}}, /* V: │ */
 223         {{{'y', 0, }}, {{0xE2, 0x89, 0xA4, 0}}}, /* LE: ≤ */
 224         {{{'z', 0, }}, {{0xE2, 0x89, 0xA5, 0}}}, /* GE: ≥ */
 225         {{{'{', 0, }}, {{0xCF, 0x80, 0, }}}, /* PI: π */
 226         {{{'|', 0, }}, {{0xE2, 0x89, 0xA0, 0}}}, /* NEQ: ≠ */
 227         {{{'}', 0, }}, {{0xC2, 0xA3, 0, }}}, /* POUND: £ */
 228         {{{'~', 0, }}, {{0xE2, 0x8B, 0x85, 0}}}, /* DOT: ⋅ */
 229         {{{0, }}, {{0, }}}
 230 };
 231
 232 static void
 233 apply_char_set(character_set cs, union utf8_char *utf8)
 234 {
 235         int i = 0;
 236
 237         while (cs[i].match.byte[0]) {
 238                 if ((*utf8).ch == cs[i].match.ch) {
 239                         *utf8 = cs[i].replace;
 240                         break;
 241                 }
 242                 i++;
 243         }
 244 }
 245
 246 struct key_map {
 247         int sym;
 248         int num;
 249         char escape;
 250         char code;
 251 };
 252 /* Set last key_sub sym to NULL */
 253 typedef struct key_map *keyboard_mode;
 254
 255 static struct key_map KM_NORMAL[] = {
 256         { XKB_KEY_Left,  1, '[', 'D' },
 257         { XKB_KEY_Right, 1, '[', 'C' },
 258         { XKB_KEY_Up,    1, '[', 'A' },
 259         { XKB_KEY_Down,  1, '[', 'B' },
 260         { XKB_KEY_Home,  1, '[', 'H' },
 261         { XKB_KEY_End,   1, '[', 'F' },
 262         { 0, 0, 0, 0 }
 263 };
 264 static struct key_map KM_APPLICATION[] = {
 265         { XKB_KEY_Left,          1, 'O', 'D' },
 266         { XKB_KEY_Right,         1, 'O', 'C' },
 267         { XKB_KEY_Up,            1, 'O', 'A' },
 268         { XKB_KEY_Down,          1, 'O', 'B' },
 269         { XKB_KEY_Home,          1, 'O', 'H' },
 270         { XKB_KEY_End,           1, 'O', 'F' },
 271         { XKB_KEY_KP_Enter,      1, 'O', 'M' },
 272         { XKB_KEY_KP_Multiply,   1, 'O', 'j' },
 273         { XKB_KEY_KP_Add,        1, 'O', 'k' },
 274         { XKB_KEY_KP_Separator,  1, 'O', 'l' },
 275         { XKB_KEY_KP_Subtract,   1, 'O', 'm' },
 276         { XKB_KEY_KP_Divide,     1, 'O', 'o' },
 277         { 0, 0, 0, 0 }
 278 };
 279
 280 static int
 281 function_key_response(char escape, int num, uint32_t modifiers,
 282                       char code, char *response)
 283 {
 284         int mod_num = 0;
 285         int len;
 286
 287         if (modifiers & MOD_SHIFT_MASK) mod_num   |= 1;
 288         if (modifiers & MOD_ALT_MASK) mod_num    |= 2;
 289         if (modifiers & MOD_CONTROL_MASK) mod_num |= 4;
 290
 291         if (mod_num != 0)
 292                 len = snprintf(response, MAX_RESPONSE, "\e[%d;%d%c",
 293                                num, mod_num + 1, code);
 294         else if (code != '~')
 295                 len = snprintf(response, MAX_RESPONSE, "\e%c%c",
 296                                escape, code);
 297         else
 298                 len = snprintf(response, MAX_RESPONSE, "\e%c%d%c",
 299                                escape, num, code);
 300
 301         if (len >= MAX_RESPONSE)        return MAX_RESPONSE - 1;
 302         else                            return len;
 303 }
 304
 305 /* returns the number of bytes written into response,
 306  * which must have room for MAX_RESPONSE bytes */
 307 static int
 308 apply_key_map(keyboard_mode mode, int sym, uint32_t modifiers, char *response)
 309 {
 310         struct key_map map;
 311         int len = 0;
 312         int i = 0;
 313
 314         while (mode[i].sym) {
 315                 map = mode[i++];
 316                 if (sym == map.sym) {
 317                         len = function_key_response(map.escape, map.num,
 318                                                     modifiers, map.code,
 319                                                     response);
 320                         break;
 321                 }
 322         }
 323
 324         return len;
 325 }
 326
 327 struct terminal_color { double r, g, b, a; };
 328 struct attr {
 329         unsigned char fg, bg;
 330         char a;        /* attributes format:
 331                         * 76543210
 332                         *    cilub */
 333         char s;        /* in selection */
 334 };
 335 struct color_scheme {
 336         struct terminal_color palette[16];
 337         char border;
 338         struct attr default_attr;
 339 };
 340
 341 static void
 342 attr_init(struct attr *data_attr, struct attr attr, int n)
 343 {
 344         int i;
 345         for (i = 0; i < n; i++) {
 346                 data_attr[i] = attr;
 347         }
 348 }
 349
 350 enum escape_state {
 351         escape_state_normal = 0,
 352         escape_state_escape,
 353         escape_state_dcs,
 354         escape_state_csi,
 355         escape_state_osc,
 356         escape_state_inner_escape,
 357         escape_state_ignore,
 358         escape_state_special
 359 };
 360
 361 #define ESC_FLAG_WHAT   0x01
 362 #define ESC_FLAG_GT     0x02
 363 #define ESC_FLAG_BANG   0x04
 364 #define ESC_FLAG_CASH   0x08
 365 #define ESC_FLAG_SQUOTE 0x10
 366 #define ESC_FLAG_DQUOTE 0x20
 367 #define ESC_FLAG_SPACE  0x40
 368
 369 enum {
 370         SELECT_NONE,
 371         SELECT_CHAR,
 372         SELECT_WORD,
 373         SELECT_LINE
 374 };
 375
 376 struct terminal {
 377         struct window *window;
 378         struct widget *widget;
 379         struct display *display;
 380         union utf8_char *data;
 381         struct task io_task;
 382         char *tab_ruler;
 383         struct attr *data_attr;
 384         struct attr curr_attr;
 385         uint32_t mode;
 386         char origin_mode;
 387         char saved_origin_mode;
 388         struct attr saved_attr;
 389         union utf8_char last_char;
 390         int margin_top, margin_bottom;
 391         character_set cs, g0, g1;
 392         character_set saved_cs, saved_g0, saved_g1;
 393         keyboard_mode key_mode;
 394         int data_pitch, attr_pitch;  /* The width in bytes of a line */
 395         int width, height, start, row, column;
 396         int saved_row, saved_column;
 397         int send_cursor_position;
 398         int fd, master;
 399         uint32_t modifiers;
 400         char escape[MAX_ESCAPE+1];
 401         int escape_length;
 402         enum escape_state state;
 403         enum escape_state outer_state;
 404         int escape_flags;
 405         struct utf8_state_machine state_machine;
 406         int margin;
 407         struct color_scheme *color_scheme;
 408         struct terminal_color color_table[256];
 409         cairo_font_extents_t extents;
 410         cairo_scaled_font_t *font_normal, *font_bold;
 411         uint32_t hide_cursor_serial;
 412
 413         struct wl_data_source *selection;
 414         uint32_t button_time;
 415         int dragging, click_count;
 416         int selection_start_x, selection_start_y;
 417         int selection_end_x, selection_end_y;
 418         int selection_start_row, selection_start_col;
 419         int selection_end_row, selection_end_col;
 420         struct wl_list link;
 421 };
 422
 423 /* Create default tab stops, every 8 characters */
 424 static void
 425 terminal_init_tabs(struct terminal *terminal)
 426 {
 427         int i = 0;
 428
 429         while (i < terminal->width) {
 430                 if (i % 8 == 0)
 431                         terminal->tab_ruler[i] = 1;
 432                 else
 433                         terminal->tab_ruler[i] = 0;
 434                 i++;
 435         }
 436 }
 437
 438 static void
 439 terminal_init(struct terminal *terminal)
 440 {
 441         terminal->curr_attr = terminal->color_scheme->default_attr;
 442         terminal->origin_mode = 0;
 443         terminal->mode = MODE_SHOW_CURSOR |
 444                          MODE_AUTOREPEAT |
 445                          MODE_ALT_SENDS_ESC |
 446                          MODE_AUTOWRAP;
 447
 448         terminal->row = 0;
 449         terminal->column = 0;
 450
 451         terminal->g0 = CS_US;
 452         terminal->g1 = CS_US;
 453         terminal->cs = terminal->g0;
 454         terminal->key_mode = KM_NORMAL;
 455
 456         terminal->saved_g0 = terminal->g0;
 457         terminal->saved_g1 = terminal->g1;
 458         terminal->saved_cs = terminal->cs;
 459
 460         terminal->saved_attr = terminal->curr_attr;
 461         terminal->saved_origin_mode = terminal->origin_mode;
 462         terminal->saved_row = terminal->row;
 463         terminal->saved_column = terminal->column;
 464
 465         if (terminal->tab_ruler != NULL) terminal_init_tabs(terminal);
 466 }
 467
 468 static void
 469 init_color_table(struct terminal *terminal)
 470 {
 471         int c, r;
 472         struct terminal_color *color_table = terminal->color_table;
 473
 474         for (c = 0; c < 256; c ++) {
 475                 if (c < 16) {
 476                         color_table[c] = terminal->color_scheme->palette[c];
 477                 } else if (c < 232) {
 478                         r = c - 16;
 479                         color_table[c].b = ((double)(r % 6) / 6.0); r /= 6;
 480                         color_table[c].g = ((double)(r % 6) / 6.0); r /= 6;
 481                         color_table[c].r = ((double)(r % 6) / 6.0);
 482                         color_table[c].a = 1.0;
 483                 } else {
 484                         r = (c - 232) * 10 + 8;
 485                         color_table[c].r = ((double) r) / 256.0;
 486                         color_table[c].g = color_table[c].r;
 487                         color_table[c].b = color_table[c].r;
 488                         color_table[c].a = 1.0;
 489                 }
 490         }
 491 }
 492
 493 static union utf8_char *
 494 terminal_get_row(struct terminal *terminal, int row)
 495 {
 496         int index;
 497
 498         index = (row + terminal->start) % terminal->height;
 499
 500         return &terminal->data[index * terminal->width];
 501 }
 502
 503 static struct attr*
 504 terminal_get_attr_row(struct terminal *terminal, int row)
 505 {
 506         int index;
 507
 508         index = (row + terminal->start) % terminal->height;
 509
 510         return &terminal->data_attr[index * terminal->width];
 511 }
 512
 513 union decoded_attr {
 514         struct attr attr;
 515         uint32_t key;
 516 };
 517
 518 static void
 519 terminal_decode_attr(struct terminal *terminal, int row, int col,
 520                      union decoded_attr *decoded)
 521 {
 522         struct attr attr;
 523         int foreground, background, tmp;
 524
 525         decoded->attr.s = 0;
 526         if (((row == terminal->selection_start_row &&
 527               col >= terminal->selection_start_col) ||
 528              row > terminal->selection_start_row) &&
 529             ((row == terminal->selection_end_row &&
 530               col < terminal->selection_end_col) ||
 531              row < terminal->selection_end_row))
 532                 decoded->attr.s = 1;
 533
 534         /* get the attributes for this character cell */
 535         attr = terminal_get_attr_row(terminal, row)[col];
 536         if ((attr.a & ATTRMASK_INVERSE) ||
 537             decoded->attr.s ||
 538             ((terminal->mode & MODE_SHOW_CURSOR) &&
 539              window_has_focus(terminal->window) && terminal->row == row &&
 540              terminal->column == col)) {
 541                 foreground = attr.bg;
 542                 background = attr.fg;
 543                 if (attr.a & ATTRMASK_BOLD) {
 544                         if (foreground <= 16) foreground |= 0x08;
 545                         if (background <= 16) background &= 0x07;
 546                 }
 547         } else {
 548                 foreground = attr.fg;
 549                 background = attr.bg;
 550         }
 551
 552         if (terminal->mode & MODE_INVERSE) {
 553                 tmp = foreground;
 554                 foreground = background;
 555                 background = tmp;
 556                 if (attr.a & ATTRMASK_BOLD) {
 557                         if (foreground <= 16) foreground |= 0x08;
 558                         if (background <= 16) background &= 0x07;
 559                 }
 560         }
 561
 562         decoded->attr.fg = foreground;
 563         decoded->attr.bg = background;
 564         decoded->attr.a = attr.a;
 565 }
 566
 567
 568 static void
 569 terminal_scroll_buffer(struct terminal *terminal, int d)
 570 {
 571         int i;
 572
 573         d = d % (terminal->height + 1);
 574         terminal->start = (terminal->start + d) % terminal->height;
 575         if (terminal->start < 0) terminal->start = terminal->height + terminal->start;
 576         if(d < 0) {
 577                 d = 0 - d;
 578                 for(i = 0; i < d; i++) {
 579                         memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
 580                         attr_init(terminal_get_attr_row(terminal, i),
 581                             terminal->curr_attr, terminal->width);
 582                 }
 583         } else {
 584                 for(i = terminal->height - d; i < terminal->height; i++) {
 585                         memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
 586                         attr_init(terminal_get_attr_row(terminal, i),
 587                             terminal->curr_attr, terminal->width);
 588                 }
 589         }
 590
 591         terminal->selection_start_row -= d;
 592         terminal->selection_end_row -= d;
 593 }
 594
 595 static void
 596 terminal_scroll_window(struct terminal *terminal, int d)
 597 {
 598         int i;
 599         int window_height;
 600         int from_row, to_row;
 601
 602         // scrolling range is inclusive
 603         window_height = terminal->margin_bottom - terminal->margin_top + 1;
 604         d = d % (window_height + 1);
 605         if(d < 0) {
 606                 d = 0 - d;
 607                 to_row = terminal->margin_bottom;
 608                 from_row = terminal->margin_bottom - d;
 609
 610                 for (i = 0; i < (window_height - d); i++) {
 611                         memcpy(terminal_get_row(terminal, to_row - i),
 612                                terminal_get_row(terminal, from_row - i),
 613                                terminal->data_pitch);
 614                         memcpy(terminal_get_attr_row(terminal, to_row - i),
 615                                terminal_get_attr_row(terminal, from_row - i),
 616                                terminal->attr_pitch);
 617                 }
 618                 for (i = terminal->margin_top; i < (terminal->margin_top + d); i++) {
 619                         memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
 620                         attr_init(terminal_get_attr_row(terminal, i),
 621                                 terminal->curr_attr, terminal->width);
 622                 }
 623         } else {
 624                 to_row = terminal->margin_top;
 625                 from_row = terminal->margin_top + d;
 626
 627                 for (i = 0; i < (window_height - d); i++) {
 628                         memcpy(terminal_get_row(terminal, to_row + i),
 629                                terminal_get_row(terminal, from_row + i),
 630                                terminal->data_pitch);
 631                         memcpy(terminal_get_attr_row(terminal, to_row + i),
 632                                terminal_get_attr_row(terminal, from_row + i),
 633                                terminal->attr_pitch);
 634                 }
 635                 for (i = terminal->margin_bottom - d + 1; i <= terminal->margin_bottom; i++) {
 636                         memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
 637                         attr_init(terminal_get_attr_row(terminal, i),
 638                                 terminal->curr_attr, terminal->width);
 639                 }
 640         }
 641 }
 642
 643 static void
 644 terminal_scroll(struct terminal *terminal, int d)
 645 {
 646         if(terminal->margin_top == 0 && terminal->margin_bottom == terminal->height - 1)
 647                 terminal_scroll_buffer(terminal, d);
 648         else
 649                 terminal_scroll_window(terminal, d);
 650 }
 651
 652 static void
 653 terminal_shift_line(struct terminal *terminal, int d)
 654 {
 655         union utf8_char *row;
 656         struct attr *attr_row;
 657
 658         row = terminal_get_row(terminal, terminal->row);
 659         attr_row = terminal_get_attr_row(terminal, terminal->row);
 660
 661         if ((terminal->width + d) <= terminal->column)
 662                 d = terminal->column + 1 - terminal->width;
 663         if ((terminal->column + d) >= terminal->width)
 664                 d = terminal->width - terminal->column - 1;
 665
 666         if (d < 0) {
 667                 d = 0 - d;
 668                 memmove(&row[terminal->column],
 669                         &row[terminal->column + d],
 670                         (terminal->width - terminal->column - d) * sizeof(union utf8_char));
 671                 memmove(&attr_row[terminal->column], &attr_row[terminal->column + d],
 672                         (terminal->width - terminal->column - d) * sizeof(struct attr));
 673                 memset(&row[terminal->width - d], 0, d * sizeof(union utf8_char));
 674                 attr_init(&attr_row[terminal->width - d], terminal->curr_attr, d);
 675         } else {
 676                 memmove(&row[terminal->column + d], &row[terminal->column],
 677                         (terminal->width - terminal->column - d) * sizeof(union utf8_char));
 678                 memmove(&attr_row[terminal->column + d], &attr_row[terminal->column],
 679                         (terminal->width - terminal->column - d) * sizeof(struct attr));
 680                 memset(&row[terminal->column], 0, d * sizeof(union utf8_char));
 681                 attr_init(&attr_row[terminal->column], terminal->curr_attr, d);
 682         }
 683 }
 684
 685 static void
 686 terminal_resize_cells(struct terminal *terminal, int width, int height)
 687 {
 688         size_t size;
 689         union utf8_char *data;
 690         struct attr *data_attr;
 691         char *tab_ruler;
 692         int data_pitch, attr_pitch;
 693         int i, l, total_rows;
 694         struct rectangle allocation;
 695         struct winsize ws;
 696
 697         if (terminal->width == width && terminal->height == height)
 698                 return;
 699
 700         data_pitch = width * sizeof(union utf8_char);
 701         size = data_pitch * height;
 702         data = malloc(size);
 703         attr_pitch = width * sizeof(struct attr);
 704         data_attr = malloc(attr_pitch * height);
 705         tab_ruler = malloc(width);
 706         memset(data, 0, size);
 707         memset(tab_ruler, 0, width);
 708         attr_init(data_attr, terminal->curr_attr, width * height);
 709         if (terminal->data && terminal->data_attr) {
 710                 if (width > terminal->width)
 711                         l = terminal->width;
 712                 else
 713                         l = width;
 714
 715                 if (terminal->height > height) {
 716                         total_rows = height;
 717                 } else {
 718                         total_rows = terminal->height;
 719                 }
 720
 721                 for (i = 0; i < total_rows; i++) {
 722                         memcpy(&data[width * i],
 723                                terminal_get_row(terminal, i),
 724                                l * sizeof(union utf8_char));
 725                         memcpy(&data_attr[width * i],
 726                                terminal_get_attr_row(terminal, i),
 727                                l * sizeof(struct attr));
 728                 }
 729
 730                 free(terminal->data);
 731                 free(terminal->data_attr);
 732                 free(terminal->tab_ruler);
 733         }
 734
 735         terminal->data_pitch = data_pitch;
 736         terminal->attr_pitch = attr_pitch;
 737         terminal->margin_bottom =
 738                 height - (terminal->height - terminal->margin_bottom);
 739         terminal->width = width;
 740         terminal->height = height;
 741         terminal->data = data;
 742         terminal->data_attr = data_attr;
 743         terminal->tab_ruler = tab_ruler;
 744         terminal_init_tabs(terminal);
 745
 746         /* Update the window size */
 747         ws.ws_row = terminal->height;
 748         ws.ws_col = terminal->width;
 749         widget_get_allocation(terminal->widget, &allocation);
 750         ws.ws_xpixel = allocation.width;
 751         ws.ws_ypixel = allocation.height;
 752         ioctl(terminal->master, TIOCSWINSZ, &ws);
 753 }
 754
 755 static void
 756 resize_handler(struct widget *widget,
 757                int32_t width, int32_t height, void *data)
 758 {
 759         struct terminal *terminal = data;
 760         int32_t columns, rows, m;
 761
 762         m = 2 * terminal->margin;
 763         columns = (width - m) / (int32_t) terminal->extents.max_x_advance;
 764         rows = (height - m) / (int32_t) terminal->extents.height;
 765
 766         if (!window_is_fullscreen(terminal->window) &&
 767             !window_is_maximized(terminal->window)) {
 768                 width = columns * terminal->extents.max_x_advance + m;
 769                 height = rows * terminal->extents.height + m;
 770                 widget_set_size(terminal->widget, width, height);
 771         }
 772
 773         terminal_resize_cells(terminal, columns, rows);
 774 }
 775
 776 static void
 777 terminal_resize(struct terminal *terminal, int columns, int rows)
 778 {
 779         int32_t width, height, m;
 780
 781         if (window_is_fullscreen(terminal->window) ||
 782             window_is_maximized(terminal->window))
 783                 return;
 784
 785         m = 2 * terminal->margin;
 786         width = columns * terminal->extents.max_x_advance + m;
 787         height = rows * terminal->extents.height + m;
 788
 789         frame_set_child_size(terminal->widget, width, height);
 790 }
 791
 792 struct color_scheme DEFAULT_COLORS = {
 793         {
 794                 {0,    0,    0,    1}, /* black */
 795                 {0.66, 0,    0,    1}, /* red */
 796                 {0  ,  0.66, 0,    1}, /* green */
 797                 {0.66, 0.33, 0,    1}, /* orange (nicer than muddy yellow) */
 798                 {0  ,  0  ,  0.66, 1}, /* blue */
 799                 {0.66, 0  ,  0.66, 1}, /* magenta */
 800                 {0,    0.66, 0.66, 1}, /* cyan */
 801                 {0.66, 0.66, 0.66, 1}, /* light grey */
 802                 {0.22, 0.33, 0.33, 1}, /* dark grey */
 803                 {1,    0.33, 0.33, 1}, /* high red */
 804                 {0.33, 1,    0.33, 1}, /* high green */
 805                 {1,    1,    0.33, 1}, /* high yellow */
 806                 {0.33, 0.33, 1,    1}, /* high blue */
 807                 {1,    0.33, 1,    1}, /* high magenta */
 808                 {0.33, 1,    1,    1}, /* high cyan */
 809                 {1,    1,    1,    1}  /* white */
 810         },
 811         0,                             /* black border */
 812         {7, 0, 0, }                    /* bg:black (0), fg:light gray (7)  */
 813 };
 814
 815 static void
 816 terminal_set_color(struct terminal *terminal, cairo_t *cr, int index)
 817 {
 818         cairo_set_source_rgba(cr,
 819                               terminal->color_table[index].r,
 820                               terminal->color_table[index].g,
 821                               terminal->color_table[index].b,
 822                               terminal->color_table[index].a);
 823 }
 824
 825 static void
 826 terminal_send_selection(struct terminal *terminal, int fd)
 827 {
 828         int row, col;
 829         union utf8_char *p_row;
 830         union decoded_attr attr;
 831         FILE *fp;
 832         int len;
 833
 834         fp = fdopen(fd, "w");
 835         for (row = 0; row < terminal->height; row++) {
 836                 p_row = terminal_get_row(terminal, row);
 837                 for (col = 0; col < terminal->width; col++) {
 838                         /* get the attributes for this character cell */
 839                         terminal_decode_attr(terminal, row, col, &attr);
 840                         if (!attr.attr.s)
 841                                 continue;
 842                         len = strnlen((char *) p_row[col].byte, 4);
 843                         if (len > 0)
 844                                 fwrite(p_row[col].byte, 1, len, fp);
 845                         if (len == 0 || col == terminal->width - 1) {
 846                                 fwrite("\n", 1, 1, fp);
 847                                 break;
 848                         }
 849                 }
 850         }
 851         fclose(fp);
 852 }
 853
 854 struct glyph_run {
 855         struct terminal *terminal;
 856         cairo_t *cr;
 857         unsigned int count;
 858         union decoded_attr attr;
 859         cairo_glyph_t glyphs[256], *g;
 860 };
 861
 862 static void
 863 glyph_run_init(struct glyph_run *run, struct terminal *terminal, cairo_t *cr)
 864 {
 865         run->terminal = terminal;
 866         run->cr = cr;
 867         run->g = run->glyphs;
 868         run->count = 0;
 869         run->attr.key = 0;
 870 }
 871
 872 static void
 873 glyph_run_flush(struct glyph_run *run, union decoded_attr attr)
 874 {
 875         cairo_scaled_font_t *font;
 876
 877         if (run->count > ARRAY_LENGTH(run->glyphs) - 10 ||
 878             (attr.key != run->attr.key)) {
 879                 if (run->attr.attr.a & (ATTRMASK_BOLD | ATTRMASK_BLINK))
 880                         font = run->terminal->font_bold;
 881                 else
 882                         font = run->terminal->font_normal;
 883                 cairo_set_scaled_font(run->cr, font);
 884                 terminal_set_color(run->terminal, run->cr,
 885                                    run->attr.attr.fg);
 886
 887                 if (!(run->attr.attr.a & ATTRMASK_CONCEALED))
 888                         cairo_show_glyphs (run->cr, run->glyphs, run->count);
 889                 run->g = run->glyphs;
 890                 run->count = 0;
 891         }
 892         run->attr = attr;
 893 }
 894
 895 static void
 896 glyph_run_add(struct glyph_run *run, int x, int y, union utf8_char *c)
 897 {
 898         int num_glyphs;
 899         cairo_scaled_font_t *font;
 900
 901         num_glyphs = ARRAY_LENGTH(run->glyphs) - run->count;
 902
 903         if (run->attr.attr.a & (ATTRMASK_BOLD | ATTRMASK_BLINK))
 904                 font = run->terminal->font_bold;
 905         else
 906                 font = run->terminal->font_normal;
 907
 908         cairo_move_to(run->cr, x, y);
 909         cairo_scaled_font_text_to_glyphs (font, x, y,
 910                                           (char *) c->byte, 4,
 911                                           &run->g, &num_glyphs,
 912                                           NULL, NULL, NULL);
 913         run->g += num_glyphs;
 914         run->count += num_glyphs;
 915 }
 916
 917
 918 static void
 919 redraw_handler(struct widget *widget, void *data)
 920 {
 921         struct terminal *terminal = data;
 922         struct rectangle allocation;
 923         cairo_t *cr;
 924         int top_margin, side_margin;
 925         int row, col, cursor_x, cursor_y;
 926         union utf8_char *p_row;
 927         union decoded_attr attr;
 928         int text_x, text_y;
 929         cairo_surface_t *surface;
 930         double d;
 931         struct glyph_run run;
 932         cairo_font_extents_t extents;
 933
 934         surface = window_get_surface(terminal->window);
 935         widget_get_allocation(terminal->widget, &allocation);
 936         cr = cairo_create(surface);
 937         cairo_rectangle(cr, allocation.x, allocation.y,
 938                         allocation.width, allocation.height);
 939         cairo_clip(cr);
 940         cairo_push_group(cr);
 941
 942         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 943         terminal_set_color(terminal, cr, terminal->color_scheme->border);
 944         cairo_paint(cr);
 945
 946         cairo_set_scaled_font(cr, terminal->font_normal);
 947
 948         extents = terminal->extents;
 949         side_margin = (allocation.width - terminal->width * extents.max_x_advance) / 2;
 950         top_margin = (allocation.height - terminal->height * extents.height) / 2;
 951
 952         cairo_set_line_width(cr, 1.0);
 953         cairo_translate(cr, allocation.x + side_margin,
 954                         allocation.y + top_margin);
 955         /* paint the background */
 956         for (row = 0; row < terminal->height; row++) {
 957                 for (col = 0; col < terminal->width; col++) {
 958                         /* get the attributes for this character cell */
 959                         terminal_decode_attr(terminal, row, col, &attr);
 960
 961                         if (attr.attr.bg == terminal->color_scheme->border)
 962                                 continue;
 963
 964                         terminal_set_color(terminal, cr, attr.attr.bg);
 965                         cairo_move_to(cr, col * extents.max_x_advance,
 966                                       row * extents.height);
 967                         cairo_rel_line_to(cr, extents.max_x_advance, 0);
 968                         cairo_rel_line_to(cr, 0, extents.height);
 969                         cairo_rel_line_to(cr, -extents.max_x_advance, 0);
 970                         cairo_close_path(cr);
 971                         cairo_fill(cr);
 972                 }
 973         }
 974
 975         cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
 976
 977         /* paint the foreground */
 978         glyph_run_init(&run, terminal, cr);
 979         for (row = 0; row < terminal->height; row++) {
 980                 p_row = terminal_get_row(terminal, row);
 981                 for (col = 0; col < terminal->width; col++) {
 982                         /* get the attributes for this character cell */
 983                         terminal_decode_attr(terminal, row, col, &attr);
 984
 985                         glyph_run_flush(&run, attr);
 986
 987                         text_x = col * extents.max_x_advance;
 988                         text_y = extents.ascent + row * extents.height;
 989                         if (attr.attr.a & ATTRMASK_UNDERLINE) {
 990                                 terminal_set_color(terminal, cr, attr.attr.fg);
 991                                 cairo_move_to(cr, text_x, (double)text_y + 1.5);
 992                                 cairo_line_to(cr, text_x + extents.max_x_advance, (double) text_y + 1.5);
 993                                 cairo_stroke(cr);
 994                         }
 995
 996                         glyph_run_add(&run, text_x, text_y, &p_row[col]);
 997                 }
 998         }
 999
1000         attr.key = ~0;
1001         glyph_run_flush(&run, attr);
1002
1003         if ((terminal->mode & MODE_SHOW_CURSOR) &&
1004             !window_has_focus(terminal->window)) {
1005                 d = 0.5;
1006
1007                 cairo_set_line_width(cr, 1);
1008                 cairo_move_to(cr, terminal->column * extents.max_x_advance + d,
1009                               terminal->row * extents.height + d);
1010                 cairo_rel_line_to(cr, extents.max_x_advance - 2 * d, 0);
1011                 cairo_rel_line_to(cr, 0, extents.height - 2 * d);
1012                 cairo_rel_line_to(cr, -extents.max_x_advance + 2 * d, 0);
1013                 cairo_close_path(cr);
1014
1015                 cairo_stroke(cr);
1016         }
1017
1018         cairo_pop_group_to_source(cr);
1019         cairo_paint(cr);
1020         cairo_destroy(cr);
1021         cairo_surface_destroy(surface);
1022
1023         if (terminal->send_cursor_position) {
1024                 cursor_x = side_margin + allocation.x +
1025                                 terminal->column * extents.max_x_advance;
1026                 cursor_y = top_margin + allocation.y +
1027                                 terminal->row * extents.height;
1028                 window_set_text_cursor_position(terminal->window,
1029                                                 cursor_x, cursor_y);
1030                 terminal->send_cursor_position = 0;
1031         }
1032 }
1033
1034 static void
1035 terminal_write(struct terminal *terminal, const char *data, size_t length)
1036 {
1037         if (write(terminal->master, data, length) < 0)
1038                 abort();
1039         terminal->send_cursor_position = 1;
1040 }
1041
1042 static void
1043 terminal_data(struct terminal *terminal, const char *data, size_t length);
1044
1045 static void
1046 handle_char(struct terminal *terminal, union utf8_char utf8);
1047
1048 static void
1049 handle_sgr(struct terminal *terminal, int code);
1050
1051 static void
1052 handle_term_parameter(struct terminal *terminal, int code, int sr)
1053 {
1054         int i;
1055
1056         if (terminal->escape_flags & ESC_FLAG_WHAT) {
1057                 switch(code) {
1058                 case 1:  /* DECCKM */
1059                         if (sr) terminal->key_mode = KM_APPLICATION;
1060                         else    terminal->key_mode = KM_NORMAL;
1061                         break;
1062                 case 2:  /* DECANM */
1063                         /* No VT52 support yet */
1064                         terminal->g0 = CS_US;
1065                         terminal->g1 = CS_US;
1066                         terminal->cs = terminal->g0;
1067                         break;
1068                 case 3:  /* DECCOLM */
1069                         if (sr)
1070                                 terminal_resize(terminal, 132, 24);
1071                         else
1072                                 terminal_resize(terminal, 80, 24);
1073
1074                         /* set columns, but also home cursor and clear screen */
1075                         terminal->row = 0; terminal->column = 0;
1076                         for (i = 0; i < terminal->height; i++) {
1077                                 memset(terminal_get_row(terminal, i),
1078                                     0, terminal->data_pitch);
1079                                 attr_init(terminal_get_attr_row(terminal, i),
1080                                     terminal->curr_attr, terminal->width);
1081                         }
1082                         break;
1083                 case 5:  /* DECSCNM */
1084                         if (sr) terminal->mode |=  MODE_INVERSE;
1085                         else    terminal->mode &= ~MODE_INVERSE;
1086                         break;
1087                 case 6:  /* DECOM */
1088                         terminal->origin_mode = sr;
1089                         if (terminal->origin_mode)
1090                                 terminal->row = terminal->margin_top;
1091                         else
1092                                 terminal->row = 0;
1093                         terminal->column = 0;
1094                         break;
1095                 case 7:  /* DECAWM */
1096                         if (sr) terminal->mode |=  MODE_AUTOWRAP;
1097                         else    terminal->mode &= ~MODE_AUTOWRAP;
1098                         break;
1099                 case 8:  /* DECARM */
1100                         if (sr) terminal->mode |=  MODE_AUTOREPEAT;
1101                         else    terminal->mode &= ~MODE_AUTOREPEAT;
1102                         break;
1103                 case 12:  /* Very visible cursor (CVVIS) */
1104                         /* FIXME: What do we do here. */
1105                         break;
1106                 case 25:
1107                         if (sr) terminal->mode |=  MODE_SHOW_CURSOR;
1108                         else    terminal->mode &= ~MODE_SHOW_CURSOR;
1109                         break;
1110                 case 1034:   /* smm/rmm, meta mode on/off */
1111                         /* ignore */
1112                         break;
1113                 case 1037:   /* deleteSendsDel */
1114                         if (sr) terminal->mode |=  MODE_DELETE_SENDS_DEL;
1115                         else    terminal->mode &= ~MODE_DELETE_SENDS_DEL;
1116                         break;
1117                 case 1039:   /* altSendsEscape */
1118                         if (sr) terminal->mode |=  MODE_ALT_SENDS_ESC;
1119                         else    terminal->mode &= ~MODE_ALT_SENDS_ESC;
1120                         break;
1121                 case 1049:   /* rmcup/smcup, alternate screen */
1122                         /* Ignore.  Should be possible to implement,
1123                          * but it's kind of annoying. */
1124                         break;
1125                 default:
1126                         fprintf(stderr, "Unknown parameter: ?%d\n", code);
1127                         break;
1128                 }
1129         } else {
1130                 switch(code) {
1131                 case 4:  /* IRM */
1132                         if (sr) terminal->mode |=  MODE_IRM;
1133                         else    terminal->mode &= ~MODE_IRM;
1134                         break;
1135                 case 20: /* LNM */
1136                         if (sr) terminal->mode |=  MODE_LF_NEWLINE;
1137                         else    terminal->mode &= ~MODE_LF_NEWLINE;
1138                         break;
1139                 default:
1140                         fprintf(stderr, "Unknown parameter: %d\n", code);
1141                         break;
1142                 }
1143         }
1144 }
1145
1146 static void
1147 handle_dcs(struct terminal *terminal)
1148 {
1149 }
1150
1151 static void
1152 handle_osc(struct terminal *terminal)
1153 {
1154         char *p;
1155         int code;
1156
1157         terminal->escape[terminal->escape_length++] = '\0';
1158         p = &terminal->escape[2];
1159         code = strtol(p, &p, 10);
1160         if (*p == ';') p++;
1161
1162         switch (code) {
1163         case 0: /* Icon name and window title */
1164         case 1: /* Icon label */
1165         case 2: /* Window title*/
1166                 window_set_title(terminal->window, p);
1167                 break;
1168         default:
1169                 fprintf(stderr, "Unknown OSC escape code %d\n", code);
1170                 break;
1171         }
1172 }
1173
1174 static void
1175 handle_escape(struct terminal *terminal)
1176 {
1177         union utf8_char *row;
1178         struct attr *attr_row;
1179         char *p;
1180         int i, count, x, y, top, bottom;
1181         int args[10], set[10] = { 0, };
1182         char response[MAX_RESPONSE] = {0, };
1183         struct rectangle allocation;
1184
1185         terminal->escape[terminal->escape_length++] = '\0';
1186         i = 0;
1187         p = &terminal->escape[2];
1188         while ((isdigit(*p) || *p == ';') && i < 10) {
1189                 if (*p == ';') {
1190                         if (!set[i]) {
1191                                 args[i] = 0;
1192                                 set[i] = 1;
1193                         }
1194                         p++;
1195                         i++;
1196                 } else {
1197                         args[i] = strtol(p, &p, 10);
1198                         set[i] = 1;
1199                 }
1200         }
1201
1202         switch (*p) {
1203         case '@':    /* ICH */
1204                 count = set[0] ? args[0] : 1;
1205                 if (count == 0) count = 1;
1206                 terminal_shift_line(terminal, count);
1207                 break;
1208         case 'A':    /* CUU */
1209                 count = set[0] ? args[0] : 1;
1210                 if (count == 0) count = 1;
1211                 if (terminal->row - count >= terminal->margin_top)
1212                         terminal->row -= count;
1213                 else
1214                         terminal->row = terminal->margin_top;
1215                 break;
1216         case 'B':    /* CUD */
1217                 count = set[0] ? args[0] : 1;
1218                 if (count == 0) count = 1;
1219                 if (terminal->row + count <= terminal->margin_bottom)
1220                         terminal->row += count;
1221                 else
1222                         terminal->row = terminal->margin_bottom;
1223                 break;
1224         case 'C':    /* CUF */
1225                 count = set[0] ? args[0] : 1;
1226                 if (count == 0) count = 1;
1227                 if ((terminal->column + count) < terminal->width)
1228                         terminal->column += count;
1229                 else
1230                         terminal->column = terminal->width - 1;
1231                 break;
1232         case 'D':    /* CUB */
1233                 count = set[0] ? args[0] : 1;
1234                 if (count == 0) count = 1;
1235                 if ((terminal->column - count) >= 0)
1236                         terminal->column -= count;
1237                 else
1238                         terminal->column = 0;
1239                 break;
1240         case 'E':    /* CNL */
1241                 count = set[0] ? args[0] : 1;
1242                 if (terminal->row + count <= terminal->margin_bottom)
1243                         terminal->row += count;
1244                 else
1245                         terminal->row = terminal->margin_bottom;
1246                 terminal->column = 0;
1247                 break;
1248         case 'F':    /* CPL */
1249                 count = set[0] ? args[0] : 1;
1250                 if (terminal->row - count >= terminal->margin_top)
1251                         terminal->row -= count;
1252                 else
1253                         terminal->row = terminal->margin_top;
1254                 terminal->column = 0;
1255                 break;
1256         case 'G':    /* CHA */
1257                 y = set[0] ? args[0] : 1;
1258                 y = y <= 0 ? 1 : y > terminal->width ? terminal->width : y;
1259
1260                 terminal->column = y - 1;
1261                 break;
1262         case 'f':    /* HVP */
1263         case 'H':    /* CUP */
1264                 x = (set[1] ? args[1] : 1) - 1;
1265                 x = x < 0 ? 0 :
1266                     (x >= terminal->width ? terminal->width - 1 : x);
1267
1268                 y = (set[0] ? args[0] : 1) - 1;
1269                 if (terminal->origin_mode) {
1270                         y += terminal->margin_top;
1271                         y = y < terminal->margin_top ? terminal->margin_top :
1272                             (y > terminal->margin_bottom ? terminal->margin_bottom : y);
1273                 } else {
1274                         y = y < 0 ? 0 :
1275                             (y >= terminal->height ? terminal->height - 1 : y);
1276                 }
1277
1278                 terminal->row = y;
1279                 terminal->column = x;
1280                 break;
1281         case 'I':    /* CHT */
1282                 count = set[0] ? args[0] : 1;
1283                 if (count == 0) count = 1;
1284                 while (count > 0 && terminal->column < terminal->width) {
1285                         if (terminal->tab_ruler[terminal->column]) count--;
1286                         terminal->column++;
1287                 }
1288                 terminal->column--;
1289                 break;
1290         case 'J':    /* ED */
1291                 row = terminal_get_row(terminal, terminal->row);
1292                 attr_row = terminal_get_attr_row(terminal, terminal->row);
1293                 if (!set[0] || args[0] == 0 || args[0] > 2) {
1294                         memset(&row[terminal->column],
1295                                0, (terminal->width - terminal->column) * sizeof(union utf8_char));
1296                         attr_init(&attr_row[terminal->column],
1297                                terminal->curr_attr, terminal->width - terminal->column);
1298                         for (i = terminal->row + 1; i < terminal->height; i++) {
1299                                 memset(terminal_get_row(terminal, i),
1300                                     0, terminal->data_pitch);
1301                                 attr_init(terminal_get_attr_row(terminal, i),
1302                                     terminal->curr_attr, terminal->width);
1303                         }
1304                 } else if (args[0] == 1) {
1305                         memset(row, 0, (terminal->column+1) * sizeof(union utf8_char));
1306                         attr_init(attr_row, terminal->curr_attr, terminal->column+1);
1307                         for (i = 0; i < terminal->row; i++) {
1308                                 memset(terminal_get_row(terminal, i),
1309                                     0, terminal->data_pitch);
1310                                 attr_init(terminal_get_attr_row(terminal, i),
1311                                     terminal->curr_attr, terminal->width);
1312                         }
1313                 } else if (args[0] == 2) {
1314                         for (i = 0; i < terminal->height; i++) {
1315                                 memset(terminal_get_row(terminal, i),
1316                                     0, terminal->data_pitch);
1317                                 attr_init(terminal_get_attr_row(terminal, i),
1318                                     terminal->curr_attr, terminal->width);
1319                         }
1320                 }
1321                 break;
1322         case 'K':    /* EL */
1323                 row = terminal_get_row(terminal, terminal->row);
1324                 attr_row = terminal_get_attr_row(terminal, terminal->row);
1325                 if (!set[0] || args[0] == 0 || args[0] > 2) {
1326                         memset(&row[terminal->column], 0,
1327                             (terminal->width - terminal->column) * sizeof(union utf8_char));
1328                         attr_init(&attr_row[terminal->column], terminal->curr_attr,
1329                             terminal->width - terminal->column);
1330                 } else if (args[0] == 1) {
1331                         memset(row, 0, (terminal->column+1) * sizeof(union utf8_char));
1332                         attr_init(attr_row, terminal->curr_attr, terminal->column+1);
1333                 } else if (args[0] == 2) {
1334                         memset(row, 0, terminal->data_pitch);
1335                         attr_init(attr_row, terminal->curr_attr, terminal->width);
1336                 }
1337                 break;
1338         case 'L':    /* IL */
1339                 count = set[0] ? args[0] : 1;
1340                 if (count == 0) count = 1;
1341                 if (terminal->row >= terminal->margin_top &&
1342                         terminal->row < terminal->margin_bottom)
1343                 {
1344                         top = terminal->margin_top;
1345                         terminal->margin_top = terminal->row;
1346                         terminal_scroll(terminal, 0 - count);
1347                         terminal->margin_top = top;
1348                 } else if (terminal->row == terminal->margin_bottom) {
1349                         memset(terminal_get_row(terminal, terminal->row),
1350                                0, terminal->data_pitch);
1351                         attr_init(terminal_get_attr_row(terminal, terminal->row),
1352                                 terminal->curr_attr, terminal->width);
1353                 }
1354                 break;
1355         case 'M':    /* DL */
1356                 count = set[0] ? args[0] : 1;
1357                 if (count == 0) count = 1;
1358                 if (terminal->row >= terminal->margin_top &&
1359                         terminal->row < terminal->margin_bottom)
1360                 {
1361                         top = terminal->margin_top;
1362                         terminal->margin_top = terminal->row;
1363                         terminal_scroll(terminal, count);
1364                         terminal->margin_top = top;
1365                 } else if (terminal->row == terminal->margin_bottom) {
1366                         memset(terminal_get_row(terminal, terminal->row),
1367                                0, terminal->data_pitch);
1368                 }
1369                 break;
1370         case 'P':    /* DCH */
1371                 count = set[0] ? args[0] : 1;
1372                 if (count == 0) count = 1;
1373                 terminal_shift_line(terminal, 0 - count);
1374                 break;
1375         case 'S':    /* SU */
1376                 terminal_scroll(terminal, set[0] ? args[0] : 1);
1377                 break;
1378         case 'T':    /* SD */
1379                 terminal_scroll(terminal, 0 - (set[0] ? args[0] : 1));
1380                 break;
1381         case 'X':    /* ECH */
1382                 count = set[0] ? args[0] : 1;
1383                 if (count == 0) count = 1;
1384                 if ((terminal->column + count) > terminal->width)
1385                         count = terminal->width - terminal->column;
1386                 row = terminal_get_row(terminal, terminal->row);
1387                 attr_row = terminal_get_attr_row(terminal, terminal->row);
1388                 memset(&row[terminal->column], 0, count * sizeof(union utf8_char));
1389                 attr_init(&attr_row[terminal->column], terminal->curr_attr, count);
1390                 break;
1391         case 'Z':    /* CBT */
1392                 count = set[0] ? args[0] : 1;
1393                 if (count == 0) count = 1;
1394                 while (count > 0 && terminal->column >= 0) {
1395                         if (terminal->tab_ruler[terminal->column]) count--;
1396                         terminal->column--;
1397                 }
1398                 terminal->column++;
1399                 break;
1400         case '`':    /* HPA */
1401                 y = set[0] ? args[0] : 1;
1402                 y = y <= 0 ? 1 : y > terminal->width ? terminal->width : y;
1403
1404                 terminal->column = y - 1;
1405                 break;
1406         case 'b':    /* REP */
1407                 count = set[0] ? args[0] : 1;
1408                 if (count == 0) count = 1;
1409                 if (terminal->last_char.byte[0])
1410                         for (i = 0; i < count; i++)
1411                                 handle_char(terminal, terminal->last_char);
1412                 terminal->last_char.byte[0] = 0;
1413                 break;
1414         case 'c':    /* Primary DA */
1415                 terminal_write(terminal, "\e[?6c", 5);
1416                 break;
1417         case 'd':    /* VPA */
1418                 x = set[0] ? args[0] : 1;
1419                 x = x <= 0 ? 1 : x > terminal->height ? terminal->height : x;
1420
1421                 terminal->row = x - 1;
1422                 break;
1423         case 'g':    /* TBC */
1424                 if (!set[0] || args[0] == 0) {
1425                         terminal->tab_ruler[terminal->column] = 0;
1426                 } else if (args[0] == 3) {
1427                         memset(terminal->tab_ruler, 0, terminal->width);
1428                 }
1429                 break;
1430         case 'h':    /* SM */
1431                 for(i = 0; i < 10 && set[i]; i++) {
1432                         handle_term_parameter(terminal, args[i], 1);
1433                 }
1434                 break;
1435         case 'l':    /* RM */
1436                 for(i = 0; i < 10 && set[i]; i++) {
1437                         handle_term_parameter(terminal, args[i], 0);
1438                 }
1439                 break;
1440         case 'm':    /* SGR */
1441                 for(i = 0; i < 10; i++) {
1442                         if (i <= 7 && set[i] && set[i + 1] &&
1443                                 set[i + 2] && args[i + 1] == 5)
1444                         {
1445                                 if (args[i] == 38) {
1446                                         handle_sgr(terminal, args[i + 2] + 256);
1447                                         break;
1448                                 } else if (args[i] == 48) {
1449                                         handle_sgr(terminal, args[i + 2] + 512);
1450                                         break;
1451                                 }
1452                         }
1453                         if(set[i]) {
1454                                 handle_sgr(terminal, args[i]);
1455                         } else if(i == 0) {
1456                                 handle_sgr(terminal, 0);
1457                                 break;
1458                         } else {
1459                                 break;
1460                         }
1461                 }
1462                 break;
1463         case 'n':    /* DSR */
1464                 i = set[0] ? args[0] : 0;
1465                 if (i == 0 || i == 5) {
1466                         terminal_write(terminal, "\e[0n", 4);
1467                 } else if (i == 6) {
1468                         snprintf(response, MAX_RESPONSE, "\e[%d;%dR",
1469                                  terminal->origin_mode ?
1470                                      terminal->row+terminal->margin_top : terminal->row+1,
1471                                  terminal->column+1);
1472                         terminal_write(terminal, response, strlen(response));
1473                 }
1474                 break;
1475         case 'r':
1476                 if(!set[0]) {
1477                         terminal->margin_top = 0;
1478                         terminal->margin_bottom = terminal->height-1;
1479                         terminal->row = 0;
1480                         terminal->column = 0;
1481                 } else {
1482                         top = (set[0] ? args[0] : 1) - 1;
1483                         top = top < 0 ? 0 :
1484                               (top >= terminal->height ? terminal->height - 1 : top);
1485                         bottom = (set[1] ? args[1] : 1) - 1;
1486                         bottom = bottom < 0 ? 0 :
1487                                  (bottom >= terminal->height ? terminal->height - 1 : bottom);
1488                         if(bottom > top) {
1489                                 terminal->margin_top = top;
1490                                 terminal->margin_bottom = bottom;
1491                         } else {
1492                                 terminal->margin_top = 0;
1493                                 terminal->margin_bottom = terminal->height-1;
1494                         }
1495                         if(terminal->origin_mode)
1496                                 terminal->row = terminal->margin_top;
1497                         else
1498                                 terminal->row = 0;
1499                         terminal->column = 0;
1500                 }
1501                 break;
1502         case 's':
1503                 terminal->saved_row = terminal->row;
1504                 terminal->saved_column = terminal->column;
1505                 break;
1506         case 't':    /* windowOps */
1507                 if (!set[0]) break;
1508                 switch (args[0]) {
1509                 case 4:  /* resize px */
1510                         if (set[1] && set[2]) {
1511                                 widget_schedule_resize(terminal->widget,
1512                                                        args[2], args[1]);
1513                         }
1514                         break;
1515                 case 8:  /* resize ch */
1516                         if (set[1] && set[2]) {
1517                                 terminal_resize(terminal, args[2], args[1]);
1518                         }
1519                         break;
1520                 case 13: /* report position */
1521                         widget_get_allocation(terminal->widget, &allocation);
1522                         snprintf(response, MAX_RESPONSE, "\e[3;%d;%dt",
1523                                  allocation.x, allocation.y);
1524                         terminal_write(terminal, response, strlen(response));
1525                         break;
1526                 case 14: /* report px */
1527                         widget_get_allocation(terminal->widget, &allocation);
1528                         snprintf(response, MAX_RESPONSE, "\e[4;%d;%dt",
1529                                  allocation.height, allocation.width);
1530                         terminal_write(terminal, response, strlen(response));
1531                         break;
1532                 case 18: /* report ch */
1533                         snprintf(response, MAX_RESPONSE, "\e[9;%d;%dt",
1534                                  terminal->height, terminal->width);
1535                         terminal_write(terminal, response, strlen(response));
1536                         break;
1537                 case 21: /* report title */
1538                         snprintf(response, MAX_RESPONSE, "\e]l%s\e\\",
1539                                  window_get_title(terminal->window));
1540                         terminal_write(terminal, response, strlen(response));
1541                         break;
1542                 default:
1543                         if (args[0] >= 24)
1544                                 terminal_resize(terminal, terminal->width, args[0]);
1545                         else
1546                                 fprintf(stderr, "Unimplemented windowOp %d\n", args[0]);
1547                         break;
1548                 }
1549         case 'u':
1550                 terminal->row = terminal->saved_row;
1551                 terminal->column = terminal->saved_column;
1552                 break;
1553         default:
1554                 fprintf(stderr, "Unknown CSI escape: %c\n", *p);
1555                 break;
1556         }
1557 }
1558
1559 static void
1560 handle_non_csi_escape(struct terminal *terminal, char code)
1561 {
1562         switch(code) {
1563         case 'M':    /* RI */
1564                 terminal->row -= 1;
1565                 if(terminal->row < terminal->margin_top) {
1566                         terminal->row = terminal->margin_top;
1567                         terminal_scroll(terminal, -1);
1568                 }
1569                 break;
1570         case 'E':    /* NEL */
1571                 terminal->column = 0;
1572                 // fallthrough
1573         case 'D':    /* IND */
1574                 terminal->row += 1;
1575                 if(terminal->row > terminal->margin_bottom) {
1576                         terminal->row = terminal->margin_bottom;
1577                         terminal_scroll(terminal, +1);
1578                 }
1579                 break;
1580         case 'c':    /* RIS */
1581                 terminal_init(terminal);
1582                 break;
1583         case 'H':    /* HTS */
1584                 terminal->tab_ruler[terminal->column] = 1;
1585                 break;
1586         case '7':    /* DECSC */
1587                 terminal->saved_row = terminal->row;
1588                 terminal->saved_column = terminal->column;
1589                 terminal->saved_attr = terminal->curr_attr;
1590                 terminal->saved_origin_mode = terminal->origin_mode;
1591                 terminal->saved_cs = terminal->cs;
1592                 terminal->saved_g0 = terminal->g0;
1593                 terminal->saved_g1 = terminal->g1;
1594                 break;
1595         case '8':    /* DECRC */
1596                 terminal->row = terminal->saved_row;
1597                 terminal->column = terminal->saved_column;
1598                 terminal->curr_attr = terminal->saved_attr;
1599                 terminal->origin_mode = terminal->saved_origin_mode;
1600                 terminal->cs = terminal->saved_cs;
1601                 terminal->g0 = terminal->saved_g0;
1602                 terminal->g1 = terminal->saved_g1;
1603                 break;
1604         case '=':    /* DECPAM */
1605                 terminal->key_mode = KM_APPLICATION;
1606                 break;
1607         case '>':    /* DECPNM */
1608                 terminal->key_mode = KM_NORMAL;
1609                 break;
1610         default:
1611                 fprintf(stderr, "Unknown escape code: %c\n", code);
1612                 break;
1613         }
1614 }
1615
1616 static void
1617 handle_special_escape(struct terminal *terminal, char special, char code)
1618 {
1619         int i, numChars;
1620
1621         if (special == '#') {
1622                 switch(code) {
1623                 case '8':
1624                         /* fill with 'E', no cheap way to do this */
1625                         memset(terminal->data, 0, terminal->data_pitch * terminal->height);
1626                         numChars = terminal->width * terminal->height;
1627                         for(i = 0; i < numChars; i++) {
1628                                 terminal->data[i].byte[0] = 'E';
1629                         }
1630                         break;
1631                 default:
1632                         fprintf(stderr, "Unknown HASH escape #%c\n", code);
1633                         break;
1634                 }
1635         } else if (special == '(' || special == ')') {
1636                 switch(code) {
1637                 case '0':
1638                         if (special == '(')
1639                                 terminal->g0 = CS_SPECIAL;
1640                         else
1641                                 terminal->g1 = CS_SPECIAL;
1642                         break;
1643                 case 'A':
1644                         if (special == '(')
1645                                 terminal->g0 = CS_UK;
1646                         else
1647                                 terminal->g1 = CS_UK;
1648                         break;
1649                 case 'B':
1650                         if (special == '(')
1651                                 terminal->g0 = CS_US;
1652                         else
1653                                 terminal->g1 = CS_US;
1654                         break;
1655                 default:
1656                         fprintf(stderr, "Unknown character set %c\n", code);
1657                         break;
1658                 }
1659         } else {
1660                 fprintf(stderr, "Unknown special escape %c%c\n", special, code);
1661         }
1662 }
1663
1664 static void
1665 handle_sgr(struct terminal *terminal, int code)
1666 {
1667         switch(code) {
1668         case 0:
1669                 terminal->curr_attr = terminal->color_scheme->default_attr;
1670                 break;
1671         case 1:
1672                 terminal->curr_attr.a |= ATTRMASK_BOLD;
1673                 if (terminal->curr_attr.fg < 8)
1674                         terminal->curr_attr.fg += 8;
1675                 break;
1676         case 4:
1677                 terminal->curr_attr.a |= ATTRMASK_UNDERLINE;
1678                 break;
1679         case 5:
1680                 terminal->curr_attr.a |= ATTRMASK_BLINK;
1681                 break;
1682         case 8:
1683                 terminal->curr_attr.a |= ATTRMASK_CONCEALED;
1684                 break;
1685         case 2:
1686         case 21:
1687         case 22:
1688                 terminal->curr_attr.a &= ~ATTRMASK_BOLD;
1689                 if (terminal->curr_attr.fg < 16 && terminal->curr_attr.fg >= 8)
1690                         terminal->curr_attr.fg -= 8;
1691                 break;
1692         case 24:
1693                 terminal->curr_attr.a &= ~ATTRMASK_UNDERLINE;
1694                 break;
1695         case 25:
1696                 terminal->curr_attr.a &= ~ATTRMASK_BLINK;
1697                 break;
1698         case 7:
1699         case 26:
1700                 terminal->curr_attr.a |= ATTRMASK_INVERSE;
1701                 break;
1702         case 27:
1703                 terminal->curr_attr.a &= ~ATTRMASK_INVERSE;
1704                 break;
1705         case 28:
1706                 terminal->curr_attr.a &= ~ATTRMASK_CONCEALED;
1707                 break;
1708         case 39:
1709                 terminal->curr_attr.fg = terminal->color_scheme->default_attr.fg;
1710                 break;
1711         case 49:
1712                 terminal->curr_attr.bg = terminal->color_scheme->default_attr.bg;
1713                 break;
1714         default:
1715                 if(code >= 30 && code <= 37) {
1716                         terminal->curr_attr.fg = code - 30;
1717                         if (terminal->curr_attr.a & ATTRMASK_BOLD)
1718                                 terminal->curr_attr.fg += 8;
1719                 } else if(code >= 40 && code <= 47) {
1720                         terminal->curr_attr.bg = code - 40;
1721                 } else if (code >= 90 && code <= 97) {
1722                         terminal->curr_attr.fg = code - 90 + 8;
1723                 } else if (code >= 100 && code <= 107) {
1724                         terminal->curr_attr.bg = code - 100 + 8;
1725                 } else if(code >= 256 && code < 512) {
1726                         terminal->curr_attr.fg = code - 256;
1727                 } else if(code >= 512 && code < 768) {
1728                         terminal->curr_attr.bg = code - 512;
1729                 } else {
1730                         fprintf(stderr, "Unknown SGR code: %d\n", code);
1731                 }
1732                 break;
1733         }
1734 }
1735
1736 /* Returns 1 if c was special, otherwise 0 */
1737 static int
1738 handle_special_char(struct terminal *terminal, char c)
1739 {
1740         union utf8_char *row;
1741         struct attr *attr_row;
1742
1743         row = terminal_get_row(terminal, terminal->row);
1744         attr_row = terminal_get_attr_row(terminal, terminal->row);
1745
1746         switch(c) {
1747         case '\r':
1748                 terminal->column = 0;
1749                 break;
1750         case '\n':
1751                 if (terminal->mode & MODE_LF_NEWLINE) {
1752                         terminal->column = 0;
1753                 }
1754                 /* fallthrough */
1755         case '\v':
1756         case '\f':
1757                 terminal->row++;
1758                 if(terminal->row > terminal->margin_bottom) {
1759                         terminal->row = terminal->margin_bottom;
1760                         terminal_scroll(terminal, +1);
1761                 }
1762
1763                 break;
1764         case '\t':
1765                 while (terminal->column < terminal->width) {
1766                         if (terminal->mode & MODE_IRM)
1767                                 terminal_shift_line(terminal, +1);
1768
1769                         if (row[terminal->column].byte[0] == '\0') {
1770                                 row[terminal->column].byte[0] = ' ';
1771                                 row[terminal->column].byte[1] = '\0';
1772                                 attr_row[terminal->column] = terminal->curr_attr;
1773                         }
1774
1775                         terminal->column++;
1776                         if (terminal->tab_ruler[terminal->column]) break;
1777                 }
1778                 if (terminal->column >= terminal->width) {
1779                         terminal->column = terminal->width - 1;
1780                 }
1781
1782                 break;
1783         case '\b':
1784                 if (terminal->column >= terminal->width) {
1785                         terminal->column = terminal->width - 2;
1786                 } else if (terminal->column > 0) {
1787                         terminal->column--;
1788                 } else if (terminal->mode & MODE_AUTOWRAP) {
1789                         terminal->column = terminal->width - 1;
1790                         terminal->row -= 1;
1791                         if (terminal->row < terminal->margin_top) {
1792                                 terminal->row = terminal->margin_top;
1793                                 terminal_scroll(terminal, -1);
1794                         }
1795                 }
1796
1797                 break;
1798         case '\a':
1799                 /* Bell */
1800                 break;
1801         case '\x0E': /* SO */
1802                 terminal->cs = terminal->g1;
1803                 break;
1804         case '\x0F': /* SI */
1805                 terminal->cs = terminal->g0;
1806                 break;
1807         case '\0':
1808                 break;
1809         default:
1810                 return 0;
1811         }
1812
1813         return 1;
1814 }
1815
1816 static void
1817 handle_char(struct terminal *terminal, union utf8_char utf8)
1818 {
1819         union utf8_char *row;
1820         struct attr *attr_row;
1821
1822         if (handle_special_char(terminal, utf8.byte[0])) return;
1823
1824         apply_char_set(terminal->cs, &utf8);
1825
1826         /* There are a whole lot of non-characters, control codes,
1827          * and formatting codes that should probably be ignored,
1828          * for example: */
1829         if (strncmp((char*) utf8.byte, "\xEF\xBB\xBF", 3) == 0) {
1830                 /* BOM, ignore */
1831                 return;
1832         }
1833
1834         /* Some of these non-characters should be translated, e.g.: */
1835         if (utf8.byte[0] < 32) {
1836                 utf8.byte[0] = utf8.byte[0] + 64;
1837         }
1838
1839         /* handle right margin effects */
1840         if (terminal->column >= terminal->width) {
1841                 if (terminal->mode & MODE_AUTOWRAP) {
1842                         terminal->column = 0;
1843                         terminal->row += 1;
1844                         if (terminal->row > terminal->margin_bottom) {
1845                                 terminal->row = terminal->margin_bottom;
1846                                 terminal_scroll(terminal, +1);
1847                         }
1848                 } else {
1849                         terminal->column--;
1850                 }
1851         }
1852
1853         row = terminal_get_row(terminal, terminal->row);
1854         attr_row = terminal_get_attr_row(terminal, terminal->row);
1855
1856         if (terminal->mode & MODE_IRM)
1857                 terminal_shift_line(terminal, +1);
1858         row[terminal->column] = utf8;
1859         attr_row[terminal->column++] = terminal->curr_attr;
1860
1861         if (utf8.ch != terminal->last_char.ch)
1862                 terminal->last_char = utf8;
1863 }
1864
1865 static void
1866 escape_append_utf8(struct terminal *terminal, union utf8_char utf8)
1867 {
1868         int len, i;
1869
1870         if ((utf8.byte[0] & 0x80) == 0x00)       len = 1;
1871         else if ((utf8.byte[0] & 0xE0) == 0xC0)  len = 2;
1872         else if ((utf8.byte[0] & 0xF0) == 0xE0)  len = 3;
1873         else if ((utf8.byte[0] & 0xF8) == 0xF0)  len = 4;
1874         else                                     len = 1;  /* Invalid, cannot happen */
1875
1876         if (terminal->escape_length + len <= MAX_ESCAPE) {
1877                 for (i = 0; i < len; i++)
1878                         terminal->escape[terminal->escape_length + i] = utf8.byte[i];
1879                 terminal->escape_length += len;
1880         } else if (terminal->escape_length < MAX_ESCAPE) {
1881                 terminal->escape[terminal->escape_length++] = 0;
1882         }
1883 }
1884
1885 static void
1886 terminal_data(struct terminal *terminal, const char *data, size_t length)
1887 {
1888         unsigned int i;
1889         union utf8_char utf8;
1890         enum utf8_state parser_state;
1891
1892         for (i = 0; i < length; i++) {
1893                 parser_state =
1894                         utf8_next_char(&terminal->state_machine, data[i]);
1895                 switch(parser_state) {
1896                 case utf8state_accept:
1897                         utf8.ch = terminal->state_machine.s.ch;
1898                         break;
1899                 case utf8state_reject:
1900                         /* the unicode replacement character */
1901                         utf8.byte[0] = 0xEF;
1902                         utf8.byte[1] = 0xBF;
1903                         utf8.byte[2] = 0xBD;
1904                         utf8.byte[3] = 0x00;
1905                         break;
1906                 default:
1907                         continue;
1908                 }
1909
1910                 /* assume escape codes never use non-ASCII characters */
1911                 switch (terminal->state) {
1912                 case escape_state_escape:
1913                         escape_append_utf8(terminal, utf8);
1914                         switch (utf8.byte[0]) {
1915                         case 'P':  /* DCS */
1916                                 terminal->state = escape_state_dcs;
1917                                 break;
1918                         case '[':  /* CSI */
1919                                 terminal->state = escape_state_csi;
1920                                 break;
1921                         case ']':  /* OSC */
1922                                 terminal->state = escape_state_osc;
1923                                 break;
1924                         case '#':
1925                         case '(':
1926                         case ')':  /* special */
1927                                 terminal->state = escape_state_special;
1928                                 break;
1929                         case '^':  /* PM (not implemented) */
1930                         case '_':  /* APC (not implemented) */
1931                                 terminal->state = escape_state_ignore;
1932                                 break;
1933                         default:
1934                                 terminal->state = escape_state_normal;
1935                                 handle_non_csi_escape(terminal, utf8.byte[0]);
1936                                 break;
1937                         }
1938                         continue;
1939                 case escape_state_csi:
1940                         if (handle_special_char(terminal, utf8.byte[0]) != 0) {
1941                                 /* do nothing */
1942                         } else if (utf8.byte[0] == '?') {
1943                                 terminal->escape_flags |= ESC_FLAG_WHAT;
1944                         } else if (utf8.byte[0] == '>') {
1945                                 terminal->escape_flags |= ESC_FLAG_GT;
1946                         } else if (utf8.byte[0] == '!') {
1947                                 terminal->escape_flags |= ESC_FLAG_BANG;
1948                         } else if (utf8.byte[0] == '$') {
1949                                 terminal->escape_flags |= ESC_FLAG_CASH;
1950                         } else if (utf8.byte[0] == '\'') {
1951                                 terminal->escape_flags |= ESC_FLAG_SQUOTE;
1952                         } else if (utf8.byte[0] == '"') {
1953                                 terminal->escape_flags |= ESC_FLAG_DQUOTE;
1954                         } else if (utf8.byte[0] == ' ') {
1955                                 terminal->escape_flags |= ESC_FLAG_SPACE;
1956                         } else {
1957                                 escape_append_utf8(terminal, utf8);
1958                                 if (terminal->escape_length >= MAX_ESCAPE)
1959                                         terminal->state = escape_state_normal;
1960                         }
1961
1962                         if (isalpha(utf8.byte[0]) || utf8.byte[0] == '@' ||
1963                                 utf8.byte[0] == '`')
1964                         {
1965                                 terminal->state = escape_state_normal;
1966                                 handle_escape(terminal);
1967                         } else {
1968                         }
1969                         continue;
1970                 case escape_state_inner_escape:
1971                         if (utf8.byte[0] == '\\') {
1972                                 terminal->state = escape_state_normal;
1973                                 if (terminal->outer_state == escape_state_dcs) {
1974                                         handle_dcs(terminal);
1975                                 } else if (terminal->outer_state == escape_state_osc) {
1976                                         handle_osc(terminal);
1977                                 }
1978                         } else if (utf8.byte[0] == '\e') {
1979                                 terminal->state = terminal->outer_state;
1980                                 escape_append_utf8(terminal, utf8);
1981                                 if (terminal->escape_length >= MAX_ESCAPE)
1982                                         terminal->state = escape_state_normal;
1983                         } else {
1984                                 terminal->state = terminal->outer_state;
1985                                 if (terminal->escape_length < MAX_ESCAPE)
1986                                         terminal->escape[terminal->escape_length++] = '\e';
1987                                 escape_append_utf8(terminal, utf8);
1988                                 if (terminal->escape_length >= MAX_ESCAPE)
1989                                         terminal->state = escape_state_normal;
1990                         }
1991                         continue;
1992                 case escape_state_dcs:
1993                 case escape_state_osc:
1994                 case escape_state_ignore:
1995                         if (utf8.byte[0] == '\e') {
1996                                 terminal->outer_state = terminal->state;
1997                                 terminal->state = escape_state_inner_escape;
1998                         } else if (utf8.byte[0] == '\a' && terminal->state == escape_state_osc) {
1999                                 terminal->state = escape_state_normal;
2000                                 handle_osc(terminal);
2001                         } else {
2002                                 escape_append_utf8(terminal, utf8);
2003                                 if (terminal->escape_length >= MAX_ESCAPE)
2004                                         terminal->state = escape_state_normal;
2005                         }
2006                         continue;
2007                 case escape_state_special:
2008                         escape_append_utf8(terminal, utf8);
2009                         terminal->state = escape_state_normal;
2010                         if (isdigit(utf8.byte[0]) || isalpha(utf8.byte[0])) {
2011                                 handle_special_escape(terminal, terminal->escape[1],
2012                                                       utf8.byte[0]);
2013                         }
2014                         continue;
2015                 default:
2016                         break;
2017                 }
2018
2019                 /* this is valid, because ASCII characters are never used to
2020                  * introduce a multibyte sequence in UTF-8 */
2021                 if (utf8.byte[0] == '\e') {
2022                         terminal->state = escape_state_escape;
2023                         terminal->outer_state = escape_state_normal;
2024                         terminal->escape[0] = '\e';
2025                         terminal->escape_length = 1;
2026                         terminal->escape_flags = 0;
2027                 } else {
2028                         handle_char(terminal, utf8);
2029                 } /* if */
2030         } /* for */
2031
2032         window_schedule_redraw(terminal->window);
2033 }
2034
2035 static void
2036 data_source_target(void *data,
2037                    struct wl_data_source *source, const char *mime_type)
2038 {
2039         fprintf(stderr, "data_source_target, %s\n", mime_type);
2040 }
2041
2042 static void
2043 data_source_send(void *data,
2044                  struct wl_data_source *source,
2045                  const char *mime_type, int32_t fd)
2046 {
2047         struct terminal *terminal = data;
2048
2049         terminal_send_selection(terminal, fd);
2050 }
2051
2052 static void
2053 data_source_cancelled(void *data, struct wl_data_source *source)
2054 {
2055         wl_data_source_destroy(source);
2056 }
2057
2058 static const struct wl_data_source_listener data_source_listener = {
2059         data_source_target,
2060         data_source_send,
2061         data_source_cancelled
2062 };
2063
2064 static void
2065 fullscreen_handler(struct window *window, void *data)
2066 {
2067         struct terminal *terminal = data;
2068
2069         window_set_fullscreen(window, !window_is_fullscreen(terminal->window));
2070 }
2071
2072 static void
2073 close_handler(struct window *window, void *data)
2074 {
2075         struct terminal *terminal = data;
2076
2077         terminal_destroy(terminal);
2078 }
2079
2080 static int
2081 handle_bound_key(struct terminal *terminal,
2082                  struct input *input, uint32_t sym, uint32_t time)
2083 {
2084         struct terminal *new_terminal;
2085
2086         switch (sym) {
2087         case XKB_KEY_X:
2088                 /* Cut selection; terminal doesn't do cut, fall
2089                  * through to copy. */
2090         case XKB_KEY_C:
2091                 terminal->selection =
2092                         display_create_data_source(terminal->display);
2093                 wl_data_source_offer(terminal->selection,
2094                                      "text/plain;charset=utf-8");
2095                 wl_data_source_add_listener(terminal->selection,
2096                                             &data_source_listener, terminal);
2097                 input_set_selection(input, terminal->selection,
2098                                     display_get_serial(terminal->display));
2099                 return 1;
2100         case XKB_KEY_V:
2101                 input_receive_selection_data_to_fd(input,
2102                                                    "text/plain;charset=utf-8",
2103                                                    terminal->master);
2104
2105                 return 1;
2106
2107         case XKB_KEY_N:
2108                 new_terminal = terminal_create(terminal->display);
2109                 if (terminal_run(new_terminal, option_shell))
2110                         terminal_destroy(new_terminal);
2111
2112                 return 1;
2113
2114         default:
2115                 return 0;
2116         }
2117 }
2118
2119 static void
2120 key_handler(struct window *window, struct input *input, uint32_t time,
2121             uint32_t key, uint32_t sym, enum wl_keyboard_key_state state,
2122             void *data)
2123 {
2124         struct terminal *terminal = data;
2125         char ch[MAX_RESPONSE];
2126         uint32_t modifiers, serial;
2127         int ret, len = 0;
2128         bool convert_utf8 = true;
2129
2130         modifiers = input_get_modifiers(input);
2131         if ((modifiers & MOD_CONTROL_MASK) &&
2132             (modifiers & MOD_SHIFT_MASK) &&
2133             state == WL_KEYBOARD_KEY_STATE_PRESSED &&
2134             handle_bound_key(terminal, input, sym, time))
2135                 return;
2136
2137         /* Map keypad symbols to 'normal' equivalents before processing */
2138         switch (sym) {
2139         case XKB_KEY_KP_Space:
2140                 sym = XKB_KEY_space;
2141                 break;
2142         case XKB_KEY_KP_Tab:
2143                 sym = XKB_KEY_Tab;
2144                 break;
2145         case XKB_KEY_KP_Enter:
2146                 sym = XKB_KEY_Return;
2147                 break;
2148         case XKB_KEY_KP_Left:
2149                 sym = XKB_KEY_Left;
2150                 break;
2151         case XKB_KEY_KP_Up:
2152                 sym = XKB_KEY_Up;
2153                 break;
2154         case XKB_KEY_KP_Right:
2155                 sym = XKB_KEY_Right;
2156                 break;
2157         case XKB_KEY_KP_Down:
2158                 sym = XKB_KEY_Down;
2159                 break;
2160         case XKB_KEY_KP_Equal:
2161                 sym = XKB_KEY_equal;
2162                 break;
2163         case XKB_KEY_KP_Multiply:
2164                 sym = XKB_KEY_asterisk;
2165                 break;
2166         case XKB_KEY_KP_Add:
2167                 sym = XKB_KEY_plus;
2168                 break;
2169         case XKB_KEY_KP_Separator:
2170                 /* Note this is actually locale-dependent and should mostly be
2171                  * a comma.  But leave it as period until we one day start
2172                  * doing the right thing. */
2173                 sym = XKB_KEY_period;
2174                 break;
2175         case XKB_KEY_KP_Subtract:
2176                 sym = XKB_KEY_minus;
2177                 break;
2178         case XKB_KEY_KP_Decimal:
2179                 sym = XKB_KEY_period;
2180                 break;
2181         case XKB_KEY_KP_Divide:
2182                 sym = XKB_KEY_slash;
2183                 break;
2184         case XKB_KEY_KP_0:
2185         case XKB_KEY_KP_1:
2186         case XKB_KEY_KP_2:
2187         case XKB_KEY_KP_3:
2188         case XKB_KEY_KP_4:
2189         case XKB_KEY_KP_5:
2190         case XKB_KEY_KP_6:
2191         case XKB_KEY_KP_7:
2192         case XKB_KEY_KP_8:
2193         case XKB_KEY_KP_9:
2194                 sym = (sym - XKB_KEY_KP_0) + XKB_KEY_0;
2195                 break;
2196         default:
2197                 break;
2198         }
2199
2200         switch (sym) {
2201         case XKB_KEY_BackSpace:
2202                 if (modifiers & MOD_ALT_MASK)
2203                         ch[len++] = 0x1b;
2204                 ch[len++] = 0x7f;
2205                 break;
2206         case XKB_KEY_Tab:
2207         case XKB_KEY_Linefeed:
2208         case XKB_KEY_Clear:
2209         case XKB_KEY_Pause:
2210         case XKB_KEY_Scroll_Lock:
2211         case XKB_KEY_Sys_Req:
2212         case XKB_KEY_Escape:
2213                 ch[len++] = sym & 0x7f;
2214                 break;
2215
2216         case XKB_KEY_Return:
2217                 if (terminal->mode & MODE_LF_NEWLINE) {
2218                         ch[len++] = 0x0D;
2219                         ch[len++] = 0x0A;
2220                 } else {
2221                         ch[len++] = 0x0D;
2222                 }
2223                 break;
2224
2225         case XKB_KEY_Shift_L:
2226         case XKB_KEY_Shift_R:
2227         case XKB_KEY_Control_L:
2228         case XKB_KEY_Control_R:
2229         case XKB_KEY_Alt_L:
2230         case XKB_KEY_Alt_R:
2231         case XKB_KEY_Meta_L:
2232         case XKB_KEY_Meta_R:
2233         case XKB_KEY_Super_L:
2234         case XKB_KEY_Super_R:
2235         case XKB_KEY_Hyper_L:
2236         case XKB_KEY_Hyper_R:
2237                 break;
2238
2239         case XKB_KEY_Insert:
2240                 len = function_key_response('[', 2, modifiers, '~', ch);
2241                 break;
2242         case XKB_KEY_Delete:
2243                 if (terminal->mode & MODE_DELETE_SENDS_DEL) {
2244                         ch[len++] = '\x04';
2245                 } else {
2246                         len = function_key_response('[', 3, modifiers, '~', ch);
2247                 }
2248                 break;
2249         case XKB_KEY_Page_Up:
2250                 len = function_key_response('[', 5, modifiers, '~', ch);
2251                 break;
2252         case XKB_KEY_Page_Down:
2253                 len = function_key_response('[', 6, modifiers, '~', ch);
2254                 break;
2255         case XKB_KEY_F1:
2256                 len = function_key_response('O', 1, modifiers, 'P', ch);
2257                 break;
2258         case XKB_KEY_F2:
2259                 len = function_key_response('O', 1, modifiers, 'Q', ch);
2260                 break;
2261         case XKB_KEY_F3:
2262                 len = function_key_response('O', 1, modifiers, 'R', ch);
2263                 break;
2264         case XKB_KEY_F4:
2265                 len = function_key_response('O', 1, modifiers, 'S', ch);
2266                 break;
2267         case XKB_KEY_F5:
2268                 len = function_key_response('[', 15, modifiers, '~', ch);
2269                 break;
2270         case XKB_KEY_F6:
2271                 len = function_key_response('[', 17, modifiers, '~', ch);
2272                 break;
2273         case XKB_KEY_F7:
2274                 len = function_key_response('[', 18, modifiers, '~', ch);
2275                 break;
2276         case XKB_KEY_F8:
2277                 len = function_key_response('[', 19, modifiers, '~', ch);
2278                 break;
2279         case XKB_KEY_F9:
2280                 len = function_key_response('[', 20, modifiers, '~', ch);
2281                 break;
2282         case XKB_KEY_F10:
2283                 len = function_key_response('[', 21, modifiers, '~', ch);
2284                 break;
2285         case XKB_KEY_F12:
2286                 len = function_key_response('[', 24, modifiers, '~', ch);
2287                 break;
2288         default:
2289                 /* Handle special keys with alternate mappings */
2290                 len = apply_key_map(terminal->key_mode, sym, modifiers, ch);
2291                 if (len != 0) break;
2292
2293                 if (modifiers & MOD_CONTROL_MASK) {
2294                         if (sym >= '3' && sym <= '7')
2295                                 sym = (sym & 0x1f) + 8;
2296
2297                         if (!((sym >= '!' && sym <= '/') ||
2298                                 (sym >= '8' && sym <= '?') ||
2299                                 (sym >= '0' && sym <= '2'))) sym = sym & 0x1f;
2300                         else if (sym == '2') sym = 0x00;
2301                         else if (sym == '/') sym = 0x1F;
2302                         else if (sym == '8' || sym == '?') sym = 0x7F;
2303                 }
2304                 if (modifiers & MOD_ALT_MASK) {
2305                         if (terminal->mode & MODE_ALT_SENDS_ESC) {
2306                                 ch[len++] = 0x1b;
2307                         } else {
2308                                 sym = sym | 0x80;
2309                                 convert_utf8 = false;
2310                         }
2311                 }
2312
2313                 if ((sym < 128) ||
2314                     (!convert_utf8 && sym < 256)) {
2315                         ch[len++] = sym;
2316                 } else {
2317                         ret = xkb_keysym_to_utf8(sym, ch + len,
2318                                                  MAX_RESPONSE - len);
2319                         if (ret < 0)
2320                                 fprintf(stderr,
2321                                         "Warning: buffer too small to encode "
2322                                         "UTF8 character\n");
2323                         else
2324                                 len += ret;
2325                 }
2326
2327                 break;
2328         }
2329
2330         if (state == WL_KEYBOARD_KEY_STATE_PRESSED && len > 0) {
2331                 terminal_write(terminal, ch, len);
2332
2333                 /* Hide cursor, except if this was coming from a
2334                  * repeating key press. */
2335                 serial = display_get_serial(terminal->display);
2336                 if (terminal->hide_cursor_serial != serial) {
2337                         input_set_pointer_image(input, CURSOR_BLANK);
2338                         terminal->hide_cursor_serial = serial;
2339                 }
2340         }
2341 }
2342
2343 static void
2344 keyboard_focus_handler(struct window *window,
2345                        struct input *device, void *data)
2346 {
2347         struct terminal *terminal = data;
2348
2349         window_schedule_redraw(terminal->window);
2350 }
2351
2352 static int wordsep(int ch)
2353 {
2354         const char extra[] = "-,./?%&#:_=+@~";
2355
2356         if (ch > 127)
2357                 return 1;
2358
2359         return ch == 0 || !(isalpha(ch) || isdigit(ch) || strchr(extra, ch));
2360 }
2361
2362 static int
2363 recompute_selection(struct terminal *terminal)
2364 {
2365         struct rectangle allocation;
2366         int col, x, width, height;
2367         int start_row, end_row;
2368         int word_start, eol;
2369         int side_margin, top_margin;
2370         int start_x, end_x;
2371         int cw, ch;
2372         union utf8_char *data;
2373
2374         cw = terminal->extents.max_x_advance;
2375         ch = terminal->extents.height;
2376         widget_get_allocation(terminal->widget, &allocation);
2377         width = terminal->width * cw;
2378         height = terminal->height * ch;
2379         side_margin = allocation.x + (allocation.width - width) / 2;
2380         top_margin = allocation.y + (allocation.height - height) / 2;
2381
2382         start_row = (terminal->selection_start_y - top_margin + ch) / ch - 1;
2383         end_row = (terminal->selection_end_y - top_margin + ch) / ch - 1;
2384
2385         if (start_row < end_row ||
2386             (start_row == end_row &&
2387              terminal->selection_start_x < terminal->selection_end_x)) {
2388                 terminal->selection_start_row = start_row;
2389                 terminal->selection_end_row = end_row;
2390                 start_x = terminal->selection_start_x;
2391                 end_x = terminal->selection_end_x;
2392         } else {
2393                 terminal->selection_start_row = end_row;
2394                 terminal->selection_end_row = start_row;
2395                 start_x = terminal->selection_end_x;
2396                 end_x = terminal->selection_start_x;
2397         }
2398
2399         eol = 0;
2400         if (terminal->selection_start_row < 0) {
2401                 terminal->selection_start_row = 0;
2402                 terminal->selection_start_col = 0;
2403         } else {
2404                 x = side_margin + cw / 2;
2405                 data = terminal_get_row(terminal,
2406                                         terminal->selection_start_row);
2407                 word_start = 0;
2408                 for (col = 0; col < terminal->width; col++, x += cw) {
2409                         if (col == 0 || wordsep(data[col - 1].ch))
2410                                 word_start = col;
2411                         if (data[col].ch != 0)
2412                                 eol = col + 1;
2413                         if (start_x < x)
2414                                 break;
2415                 }
2416
2417                 switch (terminal->dragging) {
2418                 case SELECT_LINE:
2419                         terminal->selection_start_col = 0;
2420                         break;
2421                 case SELECT_WORD:
2422                         terminal->selection_start_col = word_start;
2423                         break;
2424                 case SELECT_CHAR:
2425                         terminal->selection_start_col = col;
2426                         break;
2427                 }
2428         }
2429
2430         if (terminal->selection_end_row >= terminal->height) {
2431                 terminal->selection_end_row = terminal->height;
2432                 terminal->selection_end_col = 0;
2433         } else {
2434                 x = side_margin + cw / 2;
2435                 data = terminal_get_row(terminal, terminal->selection_end_row);
2436                 for (col = 0; col < terminal->width; col++, x += cw) {
2437                         if (terminal->dragging == SELECT_CHAR && end_x < x)
2438                                 break;
2439                         if (terminal->dragging == SELECT_WORD &&
2440                             end_x < x && wordsep(data[col].ch))
2441                                 break;
2442                 }
2443                 terminal->selection_end_col = col;
2444         }
2445
2446         if (terminal->selection_end_col != terminal->selection_start_col ||
2447             terminal->selection_start_row != terminal->selection_end_row) {
2448                 col = terminal->selection_end_col;
2449                 if (col > 0 && data[col - 1].ch == 0)
2450                         terminal->selection_end_col = terminal->width;
2451                 data = terminal_get_row(terminal, terminal->selection_start_row);
2452                 if (data[terminal->selection_start_col].ch == 0)
2453                         terminal->selection_start_col = eol;
2454         }
2455
2456         return 1;
2457 }
2458
2459 static void
2460 button_handler(struct widget *widget,
2461                struct input *input, uint32_t time,
2462                uint32_t button,
2463                enum wl_pointer_button_state state, void *data)
2464 {
2465         struct terminal *terminal = data;
2466
2467         switch (button) {
2468         case 272:
2469                 if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
2470
2471                         if (time - terminal->button_time < 500)
2472                                 terminal->click_count++;
2473                         else
2474                                 terminal->click_count = 1;
2475
2476                         terminal->button_time = time;
2477                         terminal->dragging =
2478                                 (terminal->click_count - 1) % 3 + SELECT_CHAR;
2479
2480                         input_get_position(input,
2481                                            &terminal->selection_start_x,
2482                                            &terminal->selection_start_y);
2483                         terminal->selection_end_x = terminal->selection_start_x;
2484                         terminal->selection_end_y = terminal->selection_start_y;
2485                         if (recompute_selection(terminal))
2486                                 widget_schedule_redraw(widget);
2487                 } else {
2488                         terminal->dragging = SELECT_NONE;
2489                 }
2490                 break;
2491         }
2492 }
2493
2494 static int
2495 enter_handler(struct widget *widget,
2496               struct input *input, float x, float y, void *data)
2497 {
2498         return CURSOR_IBEAM;
2499 }
2500
2501 static int
2502 motion_handler(struct widget *widget,
2503                struct input *input, uint32_t time,
2504                float x, float y, void *data)
2505 {
2506         struct terminal *terminal = data;
2507
2508         if (terminal->dragging) {
2509                 input_get_position(input,
2510                                    &terminal->selection_end_x,
2511                                    &terminal->selection_end_y);
2512
2513                 if (recompute_selection(terminal))
2514                         widget_schedule_redraw(widget);
2515         }
2516
2517         return CURSOR_IBEAM;
2518 }
2519
2520 static struct terminal *
2521 terminal_create(struct display *display)
2522 {
2523         struct terminal *terminal;
2524         cairo_surface_t *surface;
2525         cairo_t *cr;
2526
2527         terminal = malloc(sizeof *terminal);
2528         if (terminal == NULL)
2529                 return terminal;
2530
2531         memset(terminal, 0, sizeof *terminal);
2532         terminal->color_scheme = &DEFAULT_COLORS;
2533         terminal_init(terminal);
2534         terminal->margin_top = 0;
2535         terminal->margin_bottom = -1;
2536         terminal->window = window_create(display);
2537         terminal->widget = frame_create(terminal->window, terminal);
2538         window_set_title(terminal->window, "Wayland Terminal");
2539         widget_set_transparent(terminal->widget, 0);
2540
2541         init_state_machine(&terminal->state_machine);
2542         init_color_table(terminal);
2543
2544         terminal->display = display;
2545         terminal->margin = 5;
2546
2547         window_set_user_data(terminal->window, terminal);
2548         window_set_key_handler(terminal->window, key_handler);
2549         window_set_keyboard_focus_handler(terminal->window,
2550                                           keyboard_focus_handler);
2551         window_set_fullscreen_handler(terminal->window, fullscreen_handler);
2552         window_set_close_handler(terminal->window, close_handler);
2553
2554         widget_set_redraw_handler(terminal->widget, redraw_handler);
2555         widget_set_resize_handler(terminal->widget, resize_handler);
2556         widget_set_button_handler(terminal->widget, button_handler);
2557         widget_set_enter_handler(terminal->widget, enter_handler);
2558         widget_set_motion_handler(terminal->widget, motion_handler);
2559
2560         surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 0, 0);
2561         cr = cairo_create(surface);
2562         cairo_set_font_size(cr, option_font_size);
2563         cairo_select_font_face (cr, option_font,
2564                                 CAIRO_FONT_SLANT_NORMAL,
2565                                 CAIRO_FONT_WEIGHT_BOLD);
2566         terminal->font_bold = cairo_get_scaled_font (cr);
2567         cairo_scaled_font_reference(terminal->font_bold);
2568
2569         cairo_select_font_face (cr, option_font,
2570                                 CAIRO_FONT_SLANT_NORMAL,
2571                                 CAIRO_FONT_WEIGHT_NORMAL);
2572         terminal->font_normal = cairo_get_scaled_font (cr);
2573         cairo_scaled_font_reference(terminal->font_normal);
2574
2575         cairo_font_extents(cr, &terminal->extents);
2576         cairo_destroy(cr);
2577         cairo_surface_destroy(surface);
2578
2579         terminal_resize(terminal, 20, 5); /* Set minimum size first */
2580         terminal_resize(terminal, 80, 25);
2581
2582         wl_list_insert(terminal_list.prev, &terminal->link);
2583
2584         return terminal;
2585 }
2586
2587 static void
2588 terminal_destroy(struct terminal *terminal)
2589 {
2590         display_unwatch_fd(terminal->display, terminal->master);
2591         window_destroy(terminal->window);
2592         close(terminal->master);
2593         wl_list_remove(&terminal->link);
2594
2595         if (wl_list_empty(&terminal_list))
2596                 display_exit(terminal->display);
2597
2598         free(terminal);
2599 }
2600
2601 static void
2602 io_handler(struct task *task, uint32_t events)
2603 {
2604         struct terminal *terminal =
2605                 container_of(task, struct terminal, io_task);
2606         char buffer[256];
2607         int len;
2608
2609         if (events & EPOLLHUP) {
2610                 terminal_destroy(terminal);
2611                 return;
2612         }
2613
2614         len = read(terminal->master, buffer, sizeof buffer);
2615         if (len < 0)
2616                 terminal_destroy(terminal);
2617         else
2618                 terminal_data(terminal, buffer, len);
2619 }
2620
2621 static int
2622 terminal_run(struct terminal *terminal, const char *path)
2623 {
2624         int master;
2625         pid_t pid;
2626
2627         pid = forkpty(&master, NULL, NULL, NULL);
2628         if (pid == 0) {
2629                 setenv("TERM", option_term, 1);
2630                 setenv("COLORTERM", option_term, 1);
2631                 if (execl(path, path, NULL)) {
2632                         printf("exec failed: %m\n");
2633                         exit(EXIT_FAILURE);
2634                 }
2635         } else if (pid < 0) {
2636                 fprintf(stderr, "failed to fork and create pty (%m).\n");
2637                 return -1;
2638         }
2639
2640         terminal->master = master;
2641         fcntl(master, F_SETFL, O_NONBLOCK);
2642         terminal->io_task.run = io_handler;
2643         display_watch_fd(terminal->display, terminal->master,
2644                          EPOLLIN | EPOLLHUP, &terminal->io_task);
2645
2646         window_set_fullscreen(terminal->window, option_fullscreen);
2647         if (!window_is_fullscreen(terminal->window))
2648                 terminal_resize(terminal, 80, 24);
2649
2650         return 0;
2651 }
2652
2653 static const struct config_key terminal_config_keys[] = {
2654         { "font", CONFIG_KEY_STRING, &option_font },
2655         { "font-size", CONFIG_KEY_INTEGER, &option_font_size },
2656         { "term", CONFIG_KEY_STRING, &option_term },
2657 };
2658
2659 static const struct config_section config_sections[] = {
2660         { "terminal",
2661           terminal_config_keys, ARRAY_LENGTH(terminal_config_keys) },
2662 };
2663
2664 static const struct weston_option terminal_options[] = {
2665         { WESTON_OPTION_BOOLEAN, "fullscreen", 'f', &option_fullscreen },
2666         { WESTON_OPTION_STRING, "font", 0, &option_font },
2667         { WESTON_OPTION_STRING, "shell", 0, &option_shell },
2668 };
2669
2670 int main(int argc, char *argv[])
2671 {
2672         struct display *d;
2673         struct terminal *terminal;
2674         char *config_file;
2675
2676         option_shell = getenv("SHELL");
2677         if (!option_shell)
2678                 option_shell = "/bin/bash";
2679
2680         config_file = config_file_path("weston.ini");
2681         parse_config_file(config_file,
2682                           config_sections, ARRAY_LENGTH(config_sections),
2683                           NULL);
2684         free(config_file);
2685
2686         argc = parse_options(terminal_options,
2687                              ARRAY_LENGTH(terminal_options), argc, argv);
2688
2689         d = display_create(argc, argv);
2690         if (d == NULL) {
2691                 fprintf(stderr, "failed to create display: %m\n");
2692                 return -1;
2693         }
2694
2695         wl_list_init(&terminal_list);
2696         terminal = terminal_create(d);
2697         if (terminal_run(terminal, option_shell))
2698                 exit(EXIT_FAILURE);
2699
2700         display_run(d);
2701
2702         return 0;
2703 }