1 /* $OpenBSD: screen-redraw.c,v 1.28 2014/11/14 02:19:47 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 21 #include <string.h> 22 23 #include "tmux.h" 24 25 int screen_redraw_cell_border1(struct window_pane *, u_int, u_int); 26 int screen_redraw_cell_border(struct client *, u_int, u_int); 27 int screen_redraw_check_cell(struct client *, u_int, u_int, 28 struct window_pane **); 29 int screen_redraw_check_active(u_int, u_int, int, struct window *, 30 struct window_pane *); 31 32 void screen_redraw_draw_borders(struct client *, int, u_int); 33 void screen_redraw_draw_panes(struct client *, u_int); 34 void screen_redraw_draw_status(struct client *, u_int); 35 void screen_redraw_draw_number(struct client *, struct window_pane *); 36 37 #define CELL_INSIDE 0 38 #define CELL_LEFTRIGHT 1 39 #define CELL_TOPBOTTOM 2 40 #define CELL_TOPLEFT 3 41 #define CELL_TOPRIGHT 4 42 #define CELL_BOTTOMLEFT 5 43 #define CELL_BOTTOMRIGHT 6 44 #define CELL_TOPJOIN 7 45 #define CELL_BOTTOMJOIN 8 46 #define CELL_LEFTJOIN 9 47 #define CELL_RIGHTJOIN 10 48 #define CELL_JOIN 11 49 #define CELL_OUTSIDE 12 50 51 #define CELL_BORDERS " xqlkmjwvtun~" 52 53 /* Check if cell is on the border of a particular pane. */ 54 int 55 screen_redraw_cell_border1(struct window_pane *wp, u_int px, u_int py) 56 { 57 /* Inside pane. */ 58 if (px >= wp->xoff && px < wp->xoff + wp->sx && 59 py >= wp->yoff && py < wp->yoff + wp->sy) 60 return (0); 61 62 /* Left/right borders. */ 63 if ((wp->yoff == 0 || py >= wp->yoff - 1) && py <= wp->yoff + wp->sy) { 64 if (wp->xoff != 0 && px == wp->xoff - 1) 65 return (1); 66 if (px == wp->xoff + wp->sx) 67 return (1); 68 } 69 70 /* Top/bottom borders. */ 71 if ((wp->xoff == 0 || px >= wp->xoff - 1) && px <= wp->xoff + wp->sx) { 72 if (wp->yoff != 0 && py == wp->yoff - 1) 73 return (1); 74 if (py == wp->yoff + wp->sy) 75 return (1); 76 } 77 78 /* Outside pane. */ 79 return (-1); 80 } 81 82 /* Check if a cell is on the pane border. */ 83 int 84 screen_redraw_cell_border(struct client *c, u_int px, u_int py) 85 { 86 struct window *w = c->session->curw->window; 87 struct window_pane *wp; 88 int retval; 89 90 /* Check all the panes. */ 91 TAILQ_FOREACH(wp, &w->panes, entry) { 92 if (!window_pane_visible(wp)) 93 continue; 94 if ((retval = screen_redraw_cell_border1(wp, px, py)) != -1) 95 return (retval); 96 } 97 98 return (0); 99 } 100 101 /* Check if cell inside a pane. */ 102 int 103 screen_redraw_check_cell(struct client *c, u_int px, u_int py, 104 struct window_pane **wpp) 105 { 106 struct window *w = c->session->curw->window; 107 struct window_pane *wp; 108 int borders; 109 110 if (px > w->sx || py > w->sy) 111 return (CELL_OUTSIDE); 112 113 TAILQ_FOREACH(wp, &w->panes, entry) { 114 if (!window_pane_visible(wp)) 115 continue; 116 *wpp = wp; 117 118 /* If outside the pane and its border, skip it. */ 119 if ((wp->xoff != 0 && px < wp->xoff - 1) || 120 px > wp->xoff + wp->sx || 121 (wp->yoff != 0 && py < wp->yoff - 1) || 122 py > wp->yoff + wp->sy) 123 continue; 124 125 /* If definitely inside, return so. */ 126 if (!screen_redraw_cell_border(c, px, py)) 127 return (CELL_INSIDE); 128 129 /* 130 * Construct a bitmask of whether the cells to the left (bit 131 * 4), right, top, and bottom (bit 1) of this cell are borders. 132 */ 133 borders = 0; 134 if (px == 0 || screen_redraw_cell_border(c, px - 1, py)) 135 borders |= 8; 136 if (px <= w->sx && screen_redraw_cell_border(c, px + 1, py)) 137 borders |= 4; 138 if (py == 0 || screen_redraw_cell_border(c, px, py - 1)) 139 borders |= 2; 140 if (py <= w->sy && screen_redraw_cell_border(c, px, py + 1)) 141 borders |= 1; 142 143 /* 144 * Figure out what kind of border this cell is. Only one bit 145 * set doesn't make sense (can't have a border cell with no 146 * others connected). 147 */ 148 switch (borders) { 149 case 15: /* 1111, left right top bottom */ 150 return (CELL_JOIN); 151 case 14: /* 1110, left right top */ 152 return (CELL_BOTTOMJOIN); 153 case 13: /* 1101, left right bottom */ 154 return (CELL_TOPJOIN); 155 case 12: /* 1100, left right */ 156 return (CELL_TOPBOTTOM); 157 case 11: /* 1011, left top bottom */ 158 return (CELL_RIGHTJOIN); 159 case 10: /* 1010, left top */ 160 return (CELL_BOTTOMRIGHT); 161 case 9: /* 1001, left bottom */ 162 return (CELL_TOPRIGHT); 163 case 7: /* 0111, right top bottom */ 164 return (CELL_LEFTJOIN); 165 case 6: /* 0110, right top */ 166 return (CELL_BOTTOMLEFT); 167 case 5: /* 0101, right bottom */ 168 return (CELL_TOPLEFT); 169 case 3: /* 0011, top bottom */ 170 return (CELL_LEFTRIGHT); 171 } 172 } 173 174 *wpp = NULL; 175 return (CELL_OUTSIDE); 176 } 177 178 /* Check active pane indicator. */ 179 int 180 screen_redraw_check_active(u_int px, u_int py, int type, struct window *w, 181 struct window_pane *wp) 182 { 183 /* Is this off the active pane border? */ 184 if (screen_redraw_cell_border1(w->active, px, py) != 1) 185 return (0); 186 187 /* If there are more than two panes, that's enough. */ 188 if (window_count_panes(w) != 2) 189 return (1); 190 191 /* Else if the cell is not a border cell, forget it. */ 192 if (wp == NULL || (type == CELL_OUTSIDE || type == CELL_INSIDE)) 193 return (1); 194 195 /* Check if the pane covers the whole width. */ 196 if (wp->xoff == 0 && wp->sx == w->sx) { 197 /* This can either be the top pane or the bottom pane. */ 198 if (wp->yoff == 0) { /* top pane */ 199 if (wp == w->active) 200 return (px <= wp->sx / 2); 201 return (px > wp->sx / 2); 202 } 203 return (0); 204 } 205 206 /* Check if the pane covers the whole height. */ 207 if (wp->yoff == 0 && wp->sy == w->sy) { 208 /* This can either be the left pane or the right pane. */ 209 if (wp->xoff == 0) { /* left pane */ 210 if (wp == w->active) 211 return (py <= wp->sy / 2); 212 return (py > wp->sy / 2); 213 } 214 return (0); 215 } 216 217 return (type); 218 } 219 220 /* Redraw entire screen. */ 221 void 222 screen_redraw_screen(struct client *c, int draw_panes, int draw_status, 223 int draw_borders) 224 { 225 struct options *oo = &c->session->options; 226 struct tty *tty = &c->tty; 227 u_int top; 228 int status, spos; 229 230 /* Suspended clients should not be updated. */ 231 if (c->flags & CLIENT_SUSPENDED) 232 return; 233 234 /* Get status line, er, status. */ 235 spos = options_get_number(oo, "status-position"); 236 if (c->message_string != NULL || c->prompt_string != NULL) 237 status = 1; 238 else 239 status = options_get_number(oo, "status"); 240 top = 0; 241 if (status && spos == 0) 242 top = 1; 243 if (!status) 244 draw_status = 0; 245 246 if (draw_borders) 247 screen_redraw_draw_borders(c, status, top); 248 if (draw_panes) 249 screen_redraw_draw_panes(c, top); 250 if (draw_status) 251 screen_redraw_draw_status(c, top); 252 tty_reset(tty); 253 } 254 255 /* Draw a single pane. */ 256 void 257 screen_redraw_pane(struct client *c, struct window_pane *wp) 258 { 259 u_int i, yoff; 260 261 if (!window_pane_visible(wp)) 262 return; 263 264 yoff = wp->yoff; 265 if (status_at_line(c) == 0) 266 yoff++; 267 268 for (i = 0; i < wp->sy; i++) 269 tty_draw_line(&c->tty, wp->screen, i, wp->xoff, yoff); 270 tty_reset(&c->tty); 271 } 272 273 /* Draw the borders. */ 274 void 275 screen_redraw_draw_borders(struct client *c, int status, u_int top) 276 { 277 struct window *w = c->session->curw->window; 278 struct options *oo = &c->session->options; 279 struct tty *tty = &c->tty; 280 struct window_pane *wp; 281 struct grid_cell active_gc, other_gc, msg_gc; 282 u_int i, j, type, msgx = 0, msgy = 0; 283 int small, flags; 284 char msg[256]; 285 const char *tmp; 286 size_t msglen = 0; 287 288 small = (tty->sy - status + top > w->sy) || (tty->sx > w->sx); 289 if (small) { 290 flags = w->flags & (WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT); 291 if (flags == (WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT)) 292 tmp = "force-width, force-height"; 293 else if (flags == WINDOW_FORCEWIDTH) 294 tmp = "force-width"; 295 else if (flags == WINDOW_FORCEHEIGHT) 296 tmp = "force-height"; 297 else 298 tmp = "a smaller client"; 299 xsnprintf(msg, sizeof msg, "(size %ux%u from %s)", 300 w->sx, w->sy, tmp); 301 msglen = strlen(msg); 302 303 if (tty->sy - 1 - status + top > w->sy && tty->sx >= msglen) { 304 msgx = tty->sx - msglen; 305 msgy = tty->sy - 1 - status + top; 306 } else if (tty->sx - w->sx > msglen) { 307 msgx = tty->sx - msglen; 308 msgy = tty->sy - 1 - status + top; 309 } else 310 small = 0; 311 } 312 313 style_apply(&other_gc, oo, "pane-border-style"); 314 style_apply(&active_gc, oo, "pane-active-border-style"); 315 active_gc.attr = other_gc.attr = GRID_ATTR_CHARSET; 316 317 for (j = 0; j < tty->sy - status; j++) { 318 for (i = 0; i < tty->sx; i++) { 319 type = screen_redraw_check_cell(c, i, j, &wp); 320 if (type == CELL_INSIDE) 321 continue; 322 if (type == CELL_OUTSIDE && 323 small && i > msgx && j == msgy) 324 continue; 325 if (screen_redraw_check_active(i, j, type, w, wp)) 326 tty_attributes(tty, &active_gc); 327 else 328 tty_attributes(tty, &other_gc); 329 tty_cursor(tty, i, top + j); 330 tty_putc(tty, CELL_BORDERS[type]); 331 } 332 } 333 334 if (small) { 335 memcpy(&msg_gc, &grid_default_cell, sizeof msg_gc); 336 tty_attributes(tty, &msg_gc); 337 tty_cursor(tty, msgx, msgy); 338 tty_puts(tty, msg); 339 } 340 } 341 342 /* Draw the panes. */ 343 void 344 screen_redraw_draw_panes(struct client *c, u_int top) 345 { 346 struct window *w = c->session->curw->window; 347 struct tty *tty = &c->tty; 348 struct window_pane *wp; 349 struct screen *s; 350 u_int i; 351 352 TAILQ_FOREACH(wp, &w->panes, entry) { 353 if (!window_pane_visible(wp)) 354 continue; 355 s = wp->screen; 356 for (i = 0; i < wp->sy; i++) 357 tty_draw_line(tty, s, i, wp->xoff, top + wp->yoff); 358 if (c->flags & CLIENT_IDENTIFY) 359 screen_redraw_draw_number(c, wp); 360 } 361 } 362 363 /* Draw the status line. */ 364 void 365 screen_redraw_draw_status(struct client *c, u_int top) 366 { 367 struct tty *tty = &c->tty; 368 369 if (top) 370 tty_draw_line(tty, &c->status, 0, 0, 0); 371 else 372 tty_draw_line(tty, &c->status, 0, 0, tty->sy - 1); 373 } 374 375 /* Draw number on a pane. */ 376 void 377 screen_redraw_draw_number(struct client *c, struct window_pane *wp) 378 { 379 struct tty *tty = &c->tty; 380 struct session *s = c->session; 381 struct options *oo = &s->options; 382 struct window *w = wp->window; 383 struct grid_cell gc; 384 u_int idx, px, py, i, j, xoff, yoff; 385 int colour, active_colour; 386 char buf[16], *ptr; 387 size_t len; 388 389 if (window_pane_index(wp, &idx) != 0) 390 fatalx("index not found"); 391 len = xsnprintf(buf, sizeof buf, "%u", idx); 392 393 if (wp->sx < len) 394 return; 395 colour = options_get_number(oo, "display-panes-colour"); 396 active_colour = options_get_number(oo, "display-panes-active-colour"); 397 398 px = wp->sx / 2; py = wp->sy / 2; 399 xoff = wp->xoff; yoff = wp->yoff; 400 401 if (wp->sx < len * 6 || wp->sy < 5) { 402 tty_cursor(tty, xoff + px - len / 2, yoff + py); 403 goto draw_text; 404 } 405 406 px -= len * 3; 407 py -= 2; 408 409 memcpy(&gc, &grid_default_cell, sizeof gc); 410 if (w->active == wp) 411 colour_set_bg(&gc, active_colour); 412 else 413 colour_set_bg(&gc, colour); 414 tty_attributes(tty, &gc); 415 for (ptr = buf; *ptr != '\0'; ptr++) { 416 if (*ptr < '0' || *ptr > '9') 417 continue; 418 idx = *ptr - '0'; 419 420 for (j = 0; j < 5; j++) { 421 for (i = px; i < px + 5; i++) { 422 tty_cursor(tty, xoff + i, yoff + py + j); 423 if (window_clock_table[idx][j][i - px]) 424 tty_putc(tty, ' '); 425 } 426 } 427 px += 6; 428 } 429 430 len = xsnprintf(buf, sizeof buf, "%ux%u", wp->sx, wp->sy); 431 if (wp->sx < len || wp->sy < 6) 432 return; 433 tty_cursor(tty, xoff + wp->sx - len, yoff); 434 435 draw_text: 436 memcpy(&gc, &grid_default_cell, sizeof gc); 437 if (w->active == wp) 438 colour_set_fg(&gc, active_colour); 439 else 440 colour_set_fg(&gc, colour); 441 tty_attributes(tty, &gc); 442 tty_puts(tty, buf); 443 444 tty_cursor(tty, 0, 0); 445 } 446