screen-redraw.c

   1 /* $OpenBSD$ */
   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;
 282         u_int                    i, j, type;
 283
 284         style_apply(&other_gc, oo, "pane-border-style");
 285         style_apply(&active_gc, oo, "pane-active-border-style");
 286         active_gc.attr = other_gc.attr = GRID_ATTR_CHARSET;
 287
 288         for (j = 0; j < tty->sy - status; j++) {
 289                 for (i = 0; i < tty->sx; i++) {
 290                         type = screen_redraw_check_cell(c, i, j, &wp);
 291                         if (type == CELL_INSIDE)
 292                                 continue;
 293                         if (screen_redraw_check_active(i, j, type, w, wp))
 294                                 tty_attributes(tty, &active_gc);
 295                         else
 296                                 tty_attributes(tty, &other_gc);
 297                         tty_cursor(tty, i, top + j);
 298                         tty_putc(tty, CELL_BORDERS[type]);
 299                 }
 300         }
 301 }
 302
 303 /* Draw the panes. */
 304 void
 305 screen_redraw_draw_panes(struct client *c, u_int top)
 306 {
 307         struct window           *w = c->session->curw->window;
 308         struct tty              *tty = &c->tty;
 309         struct window_pane      *wp;
 310         struct screen           *s;
 311         u_int                    i;
 312
 313         TAILQ_FOREACH(wp, &w->panes, entry) {
 314                 if (!window_pane_visible(wp))
 315                         continue;
 316                 s = wp->screen;
 317                 for (i = 0; i < wp->sy; i++)
 318                         tty_draw_line(tty, s, i, wp->xoff, top + wp->yoff);
 319                 if (c->flags & CLIENT_IDENTIFY)
 320                         screen_redraw_draw_number(c, wp);
 321         }
 322 }
 323
 324 /* Draw the status line. */
 325 void
 326 screen_redraw_draw_status(struct client *c, u_int top)
 327 {
 328         struct tty      *tty = &c->tty;
 329
 330         if (top)
 331                 tty_draw_line(tty, &c->status, 0, 0, 0);
 332         else
 333                 tty_draw_line(tty, &c->status, 0, 0, tty->sy - 1);
 334 }
 335
 336 /* Draw number on a pane. */
 337 void
 338 screen_redraw_draw_number(struct client *c, struct window_pane *wp)
 339 {
 340         struct tty              *tty = &c->tty;
 341         struct session          *s = c->session;
 342         struct options          *oo = &s->options;
 343         struct window           *w = wp->window;
 344         struct grid_cell         gc;
 345         u_int                    idx, px, py, i, j, xoff, yoff;
 346         int                      colour, active_colour;
 347         char                     buf[16], *ptr;
 348         size_t                   len;
 349
 350         if (window_pane_index(wp, &idx) != 0)
 351                 fatalx("index not found");
 352         len = xsnprintf(buf, sizeof buf, "%u", idx);
 353
 354         if (wp->sx < len)
 355                 return;
 356         colour = options_get_number(oo, "display-panes-colour");
 357         active_colour = options_get_number(oo, "display-panes-active-colour");
 358
 359         px = wp->sx / 2; py = wp->sy / 2;
 360         xoff = wp->xoff; yoff = wp->yoff;
 361
 362         if (wp->sx < len * 6 || wp->sy < 5) {
 363                 tty_cursor(tty, xoff + px - len / 2, yoff + py);
 364                 goto draw_text;
 365         }
 366
 367         px -= len * 3;
 368         py -= 2;
 369
 370         memcpy(&gc, &grid_default_cell, sizeof gc);
 371         if (w->active == wp)
 372                 colour_set_bg(&gc, active_colour);
 373         else
 374                 colour_set_bg(&gc, colour);
 375         tty_attributes(tty, &gc);
 376         for (ptr = buf; *ptr != '\0'; ptr++) {
 377                 if (*ptr < '0' || *ptr > '9')
 378                         continue;
 379                 idx = *ptr - '0';
 380
 381                 for (j = 0; j < 5; j++) {
 382                         for (i = px; i < px + 5; i++) {
 383                                 tty_cursor(tty, xoff + i, yoff + py + j);
 384                                 if (clock_table[idx][j][i - px])
 385                                         tty_putc(tty, ' ');
 386                         }
 387                 }
 388                 px += 6;
 389         }
 390
 391         len = xsnprintf(buf, sizeof buf, "%ux%u", wp->sx, wp->sy);
 392         if (wp->sx < len || wp->sy < 6)
 393                 return;
 394         tty_cursor(tty, xoff + wp->sx - len, yoff);
 395
 396 draw_text:
 397         memcpy(&gc, &grid_default_cell, sizeof gc);
 398         if (w->active == wp)
 399                 colour_set_fg(&gc, active_colour);
 400         else
 401                 colour_set_fg(&gc, colour);
 402         tty_attributes(tty, &gc);
 403         tty_puts(tty, buf);
 404
 405         tty_cursor(tty, 0, 0);
 406 }