Pileus Git - wmpus/blob - wm-wmii.c

   1 /*
   2  * Copyright (c) 2011-2012, Andy Spencer <andy753421@gmail.com>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  */
  15
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18 #include <string.h>
  19
  20 #include "util.h"
  21 #include "conf.h"
  22 #include "sys.h"
  23 #include "wm.h"
  24
  25 /* Configuration */
  26 #ifndef MODKEY
  27 #define MODKEY alt
  28 #endif
  29 static int margin = 0;
  30 static int stack  = 25;
  31
  32 /* Enums */
  33 typedef enum {
  34         NONE, MOVE, RESIZE
  35 } drag_t;
  36
  37 typedef enum {
  38         SPLIT, STACK, FULL, TAB
  39 } layout_t;
  40
  41 typedef enum {
  42         TILING, FLOATING
  43 } layer_t;
  44
  45 /* Window structure types */
  46 struct win_wm { };
  47
  48 typedef struct {
  49         win_t   *win;      // the window
  50         int      height;   // win height in _this_ tag
  51         state_t  state;    // state of window
  52 } row_t;
  53
  54 typedef struct {
  55         list_t  *rows;     // of row_t
  56         row_t   *row;      // focused row
  57         int      width;    // column width
  58         layout_t layout;   // column layout
  59 } col_t;
  60
  61 typedef struct {
  62         win_t   *win;      // the window
  63         int x, y, w, h;    // position of window (in this tag)
  64         state_t  state;    // state of window
  65 } flt_t;
  66
  67 typedef struct {
  68         list_t  *cols;     // of col_t
  69         col_t   *col;      // focused col
  70         list_t  *flts;     // of flt_t
  71         flt_t   *flt;      // focused flt
  72         layer_t  layer;    // focused layer
  73         win_t   *geom;     // display size and position
  74 } dpy_t;
  75
  76 typedef struct {
  77         list_t  *dpys;     // of dpy_t
  78         dpy_t   *dpy;      // focused dpy
  79         char     name[64]; // tag name
  80 } tag_t;
  81
  82 typedef struct {
  83         list_t  *tags;     // of tag_t
  84         tag_t   *tag;      // focused tag
  85         win_t   *root;     // root/background window
  86         list_t  *screens;  // display geometry
  87 } wm_t;
  88
  89 #define WIN(node) ((win_t*)(node)->data)
  90 #define ROW(node) ((row_t*)(node)->data)
  91 #define COL(node) ((col_t*)(node)->data)
  92 #define FLT(node) ((flt_t*)(node)->data)
  93 #define DPY(node) ((dpy_t*)(node)->data)
  94 #define TAG(node) ((tag_t*)(node)->data)
  95
  96 #define tag_foreach_col(tag, dpy, col, row, win) \
  97         for (list_t *dpy =     tag ->dpys; dpy; dpy = dpy->next) \
  98         for (list_t *col = DPY(dpy)->cols; col; col = col->next) \
  99         for (list_t *row = COL(col)->rows; row; row = row->next) \
 100         for (win_t  *win = ROW(row)->win;  win; win = NULL)
 101
 102 #define tag_foreach_flt(tag, dpy, flt, win) \
 103         for (list_t *dpy =     tag ->dpys; dpy; dpy = dpy->next) \
 104         for (list_t *flt = DPY(dpy)->flts; flt; flt = flt->next) \
 105         for (win_t  *win = FLT(flt)->win;  win; win = NULL)      \
 106
 107 /* Window management data
 108  *   wm_* macros represent the currently focused item
 109  *   _only_ wm_focus protects against NULL pointers */
 110 static wm_t *wm;
 111 #define wm_tag   wm->tag
 112 #define wm_dpy   wm->tag->dpy
 113 #define wm_col   wm->tag->dpy->col
 114 #define wm_row   wm->tag->dpy->col->row
 115 #define wm_flt   wm->tag->dpy->flt
 116 #define wm_focus get_focus()
 117
 118 /* Mouse drag data */
 119 static drag_t  move_mode;
 120 static list_t *move_lrow;
 121 static list_t *move_lcol;
 122 static list_t *move_lflt;
 123 static ptr_t   move_prev;
 124 static layer_t move_layer;
 125 static struct { int v, h; } move_dir;
 126
 127 /********************
 128  * Helper functions *
 129  ********************/
 130 static int sort_win(void *a, void *b)
 131 {
 132         return ((win_t*)a)->x > ((win_t*)b)->x ?  1 :
 133                ((win_t*)a)->x < ((win_t*)b)->x ? -1 : 0;
 134 }
 135
 136 static win_t *get_focus(void)
 137 {
 138         if (!wm_tag || !wm_dpy)
 139                 return NULL;
 140         switch (wm_dpy->layer) {
 141         case TILING:
 142                 return wm_col && wm_row ? wm_row->win : NULL;
 143         case FLOATING:
 144                 return wm_flt ? wm_flt->win : NULL;
 145         }
 146         return NULL;
 147 }
 148
 149 /* Search for the target window in a given tag
 150  * win may exist in other tags as well */
 151 static int searchl(tag_t *tag, win_t *target,
 152                 list_t **_dpy, list_t **_col, list_t **_row, list_t **_flt)
 153 {
 154         tag_foreach_col(tag, dpy, col, row, win) {
 155                 if (win == target) {
 156                         if (_dpy) *_dpy = dpy;
 157                         if (_col) *_col = col;
 158                         if (_row) *_row = row;
 159                         return TILING;
 160                 }
 161         }
 162         tag_foreach_flt(tag, dpy, flt, win) {
 163                 if (win == target) {
 164                         if (_dpy) *_dpy = dpy;
 165                         if (_flt) *_flt = flt;
 166                         return FLOATING;
 167                 }
 168         }
 169         return -1;
 170 }
 171
 172 static int search(tag_t *tag, win_t *target,
 173                 dpy_t **_dpy, col_t **_col, row_t **_row, flt_t **_flt)
 174 {
 175         list_t *dpy, *col, *row, *flt;
 176         switch (searchl(tag, target, &dpy, &col, &row, &flt)) {
 177         case TILING:
 178                 if (_dpy) *_dpy = DPY(dpy);
 179                 if (_col) *_col = COL(col);
 180                 if (_row) *_row = ROW(row);
 181                 return TILING;
 182         case FLOATING:
 183                 if (_dpy) *_dpy = DPY(dpy);
 184                 if (_flt) *_flt = FLT(flt);
 185                 return FLOATING;
 186         }
 187         return -1;
 188 }
 189
 190 /* Set the layout for the windows column in the current tag */
 191 static void set_mode(win_t *win, layout_t layout)
 192 {
 193         col_t *col;
 194         if (TILING != search(wm_tag, win, NULL, &col, NULL, NULL))
 195                 return;
 196         printf("set_mode: %p, %d -> %d\n",
 197                         col, col->layout, layout);
 198         col->layout = layout;
 199         if (col->layout == SPLIT)
 200                 for (list_t *cur = col->rows; cur; cur = cur->next) {
 201                         row_t *row = cur->data;
 202                         row->height = wm_dpy->geom->h;
 203                 }
 204         wm_update();
 205 }
 206
 207 /* Focus the window in the current tag and record
 208  * it as the currently focused window */
 209 static void set_focus(win_t *win)
 210 {
 211         if (win == NULL || win == wm->root) {
 212                 sys_focus(wm->root);
 213                 return;
 214         }
 215
 216         dpy_t *dpy; col_t *col; row_t *row; flt_t *flt;
 217         switch (search(wm_tag, win, &dpy, &col, &row, &flt)) {
 218         case TILING:
 219                 wm_dpy = dpy;
 220                 wm_col = col;
 221                 wm_row = row;
 222                 dpy->layer = TILING;
 223                 break;
 224         case FLOATING:
 225                 wm_dpy = dpy;
 226                 wm_flt = flt;
 227                 dpy->layer = FLOATING;
 228                 break;
 229         }
 230         sys_focus(win);
 231 }
 232
 233 /* Save mouse start location when moving/resizing windows */
 234 static void set_move(win_t *win, ptr_t ptr, drag_t drag)
 235 {
 236         printf("set_move: %d - %p@%d,%d\n",
 237                         drag, win, ptr.rx, ptr.ry);
 238         move_mode = drag;
 239         if (drag == MOVE || drag == RESIZE) {
 240                 move_layer = searchl(wm_tag, win, NULL,
 241                                 &move_lcol, &move_lrow, &move_lflt);
 242                 if (move_layer < 0)
 243                         return;
 244                 move_prev = ptr;
 245                 int midy = win->y + (win->h/2);
 246                 int midx = win->x + (win->w/2);
 247                 move_dir.v = ptr.ry < midy ? -1 : +1;
 248                 move_dir.h = ptr.rx < midx ? -1 : +1;
 249         }
 250 }
 251
 252 /* Print a text representation of the window layout
 253  * Quite useful for debugging */
 254 static void print_txt(void)
 255 {
 256         for (list_t *ltag = wm->tags; ltag; ltag = ltag->next) {
 257                 tag_t *tag = ltag->data;
 258                 printf("tag:       <%-9p [%p->%p] >%-9p d=%-9p - %s\n",
 259                                 ltag->prev, ltag, ltag->data, ltag->next,
 260                                 tag->dpy, tag->name);
 261         for (list_t *ldpy = tag->dpys; ldpy; ldpy = ldpy->next) {
 262                 dpy_t *dpy  = ldpy->data;
 263                 win_t *geom = dpy->geom;
 264                 printf("  dpy:     <%-9p [%p->%p] >%-9p %c=%-9p - %d,%d %dx%d\n",
 265                                 ldpy->prev, ldpy, ldpy->data, ldpy->next,
 266                                 dpy->layer == TILING ? 'c' : 'f',
 267                                 dpy->layer == TILING ? (void*)dpy->col : (void*)dpy->flt,
 268                                 geom->x, geom->y, geom->h, geom->w);
 269         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next) {
 270                 col_t *col = lcol->data;
 271                 printf("    col:   <%-9p [%p->%p] >%-9p r=%-9p - %dpx @ %d\n",
 272                                 lcol->prev, lcol, lcol->data, lcol->next,
 273                                 col->row, col->width, col->layout);
 274         for (list_t *lrow = col->rows; lrow; lrow = lrow->next) {
 275                 row_t *row = lrow->data;
 276                 win_t *win = row->win;
 277                 printf("      win: <%-9p [%p>>%p] >%-9p focus=%d%d    - %4dpx \n",
 278                                 lrow->prev, lrow, win, lrow->next,
 279                                 col->row == row, wm_focus == win, win->h);
 280         } }
 281         for (list_t *lflt = dpy->flts; lflt; lflt = lflt->next) {
 282                 flt_t *flt = lflt->data;
 283                 win_t *win = flt->win;
 284                 printf("    flt:   <%-9p [%p>>%p] >%-9p focus=%d%d    - %d,%d %dx%d \n",
 285                                 lflt->prev, lflt, win, lflt->next,
 286                                 dpy->flt == flt, wm_focus == flt->win,
 287                                 flt->x, flt->y, flt->h, flt->w);
 288         }  } }
 289 }
 290
 291 /* Cleanly remove a window from a tag
 292  *   Determines the new focused row/col
 293  *   Prunes empty lists */
 294 static layer_t cut_win(win_t *win, tag_t *tag)
 295 {
 296         list_t *ldpy, *lcol, *lrow, *lflt;
 297         layer_t layer = searchl(tag, win, &ldpy, &lcol, &lrow, &lflt);
 298
 299         if (layer == TILING) {
 300                 dpy_t *dpy = DPY(ldpy);
 301                 col_t *col = COL(lcol);
 302                 col->row  = lrow->prev ? lrow->prev->data :
 303                             lrow->next ? lrow->next->data : NULL;
 304                 col->rows = list_remove(col->rows, lrow, 1);
 305                 if (col->rows == NULL && (lcol->next || lcol->prev)) {
 306                         dpy->col  = lcol->prev ? lcol->prev->data :
 307                                     lcol->next ? lcol->next->data : NULL;
 308                         dpy->cols = list_remove(dpy->cols, lcol, 1);
 309                 }
 310         }
 311
 312         if (layer == FLOATING) {
 313                 dpy_t *dpy = DPY(ldpy);
 314                 dpy->flts = list_remove(dpy->flts, lflt, 1);
 315                 dpy->flt  = dpy->flts ? list_last(dpy->flts)->data : NULL;
 316                 if (!dpy->flt && dpy->col && dpy->col->row)
 317                         dpy->layer = TILING;
 318         }
 319
 320         return layer;
 321 }
 322
 323 /* Insert a window into the tiling layer
 324  *   The window is added immediately after the
 325  *   columns currently focused row */
 326 static void put_win_col(win_t *win, tag_t *tag, dpy_t *dpy, col_t *col)
 327 {
 328         row_t *row = new0(row_t);
 329         row->win   = win;
 330         row->state = win->state ?: ST_SHOW;
 331
 332         if (col == NULL) {
 333                 col = new0(col_t);
 334                 dpy->cols = list_insert(dpy->cols, col);
 335         }
 336
 337         int nrows = list_length(col->rows);
 338         if (col->row) {
 339                 list_t *prev = list_find(col->rows, col->row);
 340                 list_insert_after(prev, row);
 341         } else {
 342                 col->rows = list_insert(col->rows, row);
 343         }
 344         tag->dpy           = dpy;
 345         tag->dpy->col      = col;
 346         tag->dpy->col->row = row;
 347         tag->dpy->layer    = TILING;
 348
 349         row->height = dpy->geom->h / MAX(nrows,1);
 350         if (nrows == 0) {
 351                 int ncols = list_length(dpy->cols);
 352                 col->width = dpy->geom->w / MAX(ncols-1,1);
 353         }
 354 }
 355
 356 /* Insert a window into the floating layer */
 357 static void put_win_flt(win_t *win, tag_t *tag, dpy_t *dpy)
 358 {
 359         flt_t *flt = new0(flt_t);
 360         flt->win   = win;
 361         flt->w     = dpy->geom->w / 2;
 362         flt->h     = dpy->geom->h / 2;
 363         flt->x     = dpy->geom->x + flt->w / 2;
 364         flt->y     = dpy->geom->y + flt->h / 2;
 365         flt->state = win->state ?: ST_SHOW;
 366         if (dpy->flt) {
 367                 flt->x = dpy->flt->x + 20;
 368                 flt->y = dpy->flt->y + 20;
 369         }
 370         dpy->flts = list_append(dpy->flts, flt);
 371         tag->dpy        = dpy;
 372         tag->dpy->flt   = flt;
 373         tag->dpy->layer = FLOATING;
 374 }
 375
 376 /* Insert a window into a tag */
 377 static void put_win(win_t *win, tag_t *tag, layer_t layer)
 378 {
 379         if (layer == TILING)
 380                 put_win_col(win, tag, tag->dpy, tag->dpy->col);
 381         if (layer == FLOATING)
 382                 put_win_flt(win, tag, tag->dpy);
 383 }
 384
 385 /* Move a window up, down, left, or right
 386  *   This handles moving with a column, between
 387  *   columns, and between multiple monitors. */
 388 static void shift_window(win_t *win, int col, int row)
 389 {
 390         if (!win) return;
 391         printf("shift_window: %p - %+d,%+d\n", win, col, row);
 392         print_txt();
 393         printf("shift_window: >>>\n");
 394         list_t *ldpy, *lcol, *lrow, *lflt;
 395         if (TILING != searchl(wm_tag, win, &ldpy, &lcol, &lrow, &lflt))
 396                 return;
 397         dpy_t *dpy = ldpy->data;
 398         if (row != 0) {
 399                 /* Move with a column, just swap rows */
 400                 list_t *src = lrow, *dst = NULL;
 401                 if (row < 0) dst = src->prev;
 402                 if (row > 0) dst = src->next;
 403                 if (src && dst) {
 404                         printf("swap: %p <-> %p\n", src->data, dst->data);
 405                         row_t *tmp = src->data;
 406                         src->data = dst->data;
 407                         dst->data = tmp;
 408                         goto update;
 409                 }
 410         } else {
 411                 /* Moving between columns */
 412                 int onlyrow = !lrow->prev && !lrow->next;
 413                 list_t *src = lcol, *dst = NULL;
 414                 if (col < 0) {
 415                         if (src->prev) {
 416                                 /* Normal move between columns */
 417                                 dst = src->prev;
 418                         } else if (!onlyrow) {
 419                                 /* Create new column */
 420                                 dpy->cols = list_insert(dpy->cols, new0(col_t));
 421                                 dst = src->prev;
 422                         } else if (ldpy->prev) {
 423                                 /* Move to next monitor */
 424                                 dpy = ldpy->prev->data;
 425                                 dst = list_last(dpy->cols);
 426                         } else {
 427                                 /* We, shall, not, be,
 428                                  * we shall not be moved */
 429                                 return;
 430                         }
 431                 }
 432                 if (col > 0) {
 433                         if (src->next) {
 434                                 dst = src->next;
 435                         } else if (!onlyrow) {
 436                                 dpy->cols = list_append(dpy->cols, new0(col_t));
 437                                 dst = src->next;
 438                         } else if (ldpy->next) {
 439                                 dpy = ldpy->next->data;
 440                                 dst = dpy->cols;
 441                         } else {
 442                                 return;
 443                         }
 444                 }
 445                 cut_win(win, wm_tag);
 446                 put_win_col(win, wm_tag, dpy, dst ? dst->data : NULL);
 447                 goto update;
 448         }
 449 update:
 450         print_txt();
 451         wm_update();
 452 }
 453
 454 /* Get next/prev item, with wraparound */
 455 static list_t *get_next(list_t *list, int forward)
 456 {
 457         list_t *next = forward ? list->next : list->prev;
 458         if (next == NULL) {
 459                 next = list;
 460                 while ((list = forward ? next->prev : next->next))
 461                         next = list;
 462         }
 463         return next;
 464 }
 465
 466 /* Move keyboard focus in a given direction */
 467 static void shift_focus(int cols, int rows)
 468 {
 469         printf("shift_focus: %+d,%+d\n", cols, rows);
 470         if (rows != 0 && wm_focus) {
 471                 /* Move focus up/down */
 472                 list_t *dpy, *col, *row;
 473                 if (TILING != searchl(wm_tag, wm_focus, &dpy, &col, &row, NULL))
 474                         return;
 475                 row_t *next = get_next(row, rows > 0)->data;
 476                 set_focus(next->win);
 477                 if (COL(col)->layout != SPLIT)
 478                         wm_update();
 479         }
 480         if (cols != 0) {
 481                 /* Move focus left/right */
 482                 list_t *dpy, *col, *row, *ndpy, *ncol = NULL;
 483                 if (wm_focus) {
 484                         /* Currently focused on a window */
 485                         if (TILING != searchl(wm_tag, wm_focus, &dpy, &col, &row, NULL))
 486                                 return;
 487                         ncol = cols > 0 ? col->next : col->prev;
 488                 } else {
 489                         /* Currently focused on an empty display */
 490                         dpy = list_find(wm_tag->dpys, wm_dpy);
 491                 }
 492                 if (ncol == NULL) {
 493                         /* Moving focus to a different display */
 494                         ndpy = get_next(dpy, cols > 0);
 495                         ncol = cols > 0 ? DPY(ndpy)->cols :
 496                                 list_last(DPY(ndpy)->cols);
 497                         wm_dpy = ndpy->data;
 498                 }
 499                 if (ncol && COL(ncol) && COL(ncol)->row)
 500                         set_focus(COL(ncol)->row->win);
 501                 else
 502                         sys_focus(wm->root);
 503         }
 504 }
 505
 506 /* Raise the window in the floating */
 507 static void raise_float(win_t *win)
 508 {
 509         printf("raise_float: %p\n", win);
 510         list_t *cur;
 511         for (cur = wm_dpy->flts; cur; cur = cur->next)
 512                 if (FLT(cur)->win == win)
 513                         break;
 514         if (cur) {
 515                 flt_t *flt = cur->data;
 516                 wm_dpy->flts = list_remove(wm_dpy->flts, cur, 0);
 517                 wm_dpy->flts = list_append(wm_dpy->flts, flt);
 518                 sys_raise(win);
 519         }
 520 }
 521
 522 /* Toggle between floating and tiling layers */
 523 static void switch_layer(void)
 524 {
 525         printf("switch_float: %p %d\n",
 526                         wm_dpy, wm_dpy->layer);
 527         wm_dpy->layer = !wm_dpy->layer;
 528         wm_update();
 529 }
 530
 531 /* Move current window between floating and tiling layers */
 532 static void set_layer(win_t *win)
 533 {
 534         if (!win) return;
 535         printf("set_float: %p %p\n", wm_dpy, win);
 536         wm_dpy->layer = !cut_win(win, wm_tag);
 537         put_win(win, wm_tag, wm_dpy->layer);
 538         wm_update();
 539 }
 540
 541 /* Allocate a new tag */
 542 static tag_t *tag_new(list_t *screens, const char *name)
 543 {
 544         tag_t *tag = new0(tag_t);
 545         strncpy(tag->name, name, sizeof(tag->name));
 546         for (list_t *cur = screens; cur; cur = cur->next) {
 547                 dpy_t *dpy  = new0(dpy_t);
 548                 dpy->geom = cur->data;
 549                 tag->dpys = list_append(tag->dpys, dpy);
 550         }
 551         tag->dpy  = tag->dpys->data;
 552         for (list_t *dpy = tag->dpys; dpy; dpy = dpy->next)
 553                 if (DPY(dpy)->geom->z > tag->dpy->geom->z)
 554                         tag->dpy = dpy->data;
 555         return tag;
 556 }
 557
 558 /* Search for a tag
 559  *   If it does not exist it is based on the
 560  *   display geometry in wm->screens */
 561 static tag_t *tag_find(const char *name)
 562 {
 563         tag_t *tag = NULL;
 564         for (list_t *cur = wm->tags; cur; cur = cur->next)
 565                 if (!strcmp(name, TAG(cur)->name)) {
 566                         tag = cur->data;
 567                         break;
 568                 }
 569         if (!tag) {
 570                 tag = tag_new(wm->screens, name);
 571                 wm->tags = list_append(wm->tags, tag);
 572         }
 573         return tag;
 574 }
 575
 576 /* Move the window from the current tag to the new tag
 577  *   Unlike wmii, only remove the current tag, not all tags */
 578 static void tag_set(win_t *win, const char *name)
 579 {
 580         printf("tag_set: %p %s\n", win, name);
 581         if (!strcmp(wm_tag->name, name))
 582                 return;
 583         tag_t *tag = tag_find(name);
 584         layer_t layer = cut_win(win, wm_tag);
 585         put_win(win, tag, layer);
 586         set_focus(wm_focus);
 587 }
 588
 589 /* Switch to a different tag */
 590 static void tag_switch(const char *name)
 591 {
 592         printf("tag_switch: %s\n", name);
 593         tag_t *old = wm_tag;
 594         if ((wm_col == NULL || wm_row == NULL) && wm_flt == NULL) {
 595                 while (old->dpys) {
 596                         dpy_t *dpy = old->dpys->data;
 597                         while (dpy->cols)
 598                                 dpy->cols = list_remove(dpy->cols, dpy->cols, 1);
 599                         old->dpys = list_remove(old->dpys, old->dpys, 1);
 600                 }
 601                 list_t *ltag = list_find(wm->tags, old);
 602                 wm->tags = list_remove(wm->tags, ltag, 1);
 603         }
 604         wm_tag = tag_find(name);
 605 }
 606
 607 /* Tile all windows in the given display
 608  *   This performs all the actual window tiling
 609  *   Currently supports  split, stack and maximized modes */
 610 static void wm_update_cols(dpy_t *dpy)
 611 {
 612         int  x=0,  y=0; // Current window top-left position
 613         int tx=0, ty=0; // Total size (sum of initial col widths and row heights w/o margin)
 614         int mx=0, my=0; // Maximum usable size (screen size minus margins)
 615         int       sy=0; // Stack size (height of focused stack window)
 616
 617         /* Scale horizontally */
 618         x  = dpy->geom->x;
 619         mx = dpy->geom->w - (list_length(dpy->cols)+1)*margin;
 620         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next)
 621                 tx += COL(lcol)->width;
 622         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next)
 623                 COL(lcol)->width *= (float)mx / tx;
 624
 625         /* Scale each column vertically */
 626         win_t *focus = get_focus();
 627         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next) {
 628                 col_t *col = lcol->data;
 629                 int nrows = list_length(col->rows);
 630                 ty = 0;
 631                 for (list_t *lrow = col->rows; lrow; lrow = lrow->next)
 632                         ty += ROW(lrow)->height;
 633                 y  = dpy->geom->y;
 634                 my = dpy->geom->h - (margin + (nrows-1)* margin    + margin);
 635                 sy = dpy->geom->h - (margin + (nrows-1)*(margin/2) + margin)
 636                                   -           (nrows-1)* stack;
 637                 for (list_t *lrow = col->rows; lrow; lrow = lrow->next) {
 638                         win_t *win = ROW(lrow)->win;
 639                         if (ROW(lrow)->state != ST_SHOW) {
 640                                 sys_show(win, ROW(lrow)->state);
 641                                 continue;
 642                         }
 643                         win->h = ROW(lrow)->height;
 644                         state_t state = ST_SHOW;
 645                         int height = 0;
 646                         switch (col->layout) {
 647                         case SPLIT:
 648                                 sys_move(win, x+margin, y+margin,
 649                                         col->width, win->h * ((float)my / ty));
 650                                 height = win->h;
 651                                 y += height + margin;
 652                                 break;
 653                         case STACK:
 654                                 if (lrow->next && ROW(lrow->next)->win == col->row->win) {
 655                                         /* Hack to prevent flashing */
 656                                         win_t *next = ROW(lrow->next)->win;
 657                                         sys_move(next, x+margin, y+margin+stack+margin/2,
 658                                                 col->width, sy);
 659                                         sys_show(next, ST_SHOW);
 660                                 }
 661                                 int isfocus = win == col->row->win;
 662                                 state  = isfocus ? ST_SHOW : ST_SHADE;
 663                                 sys_show(win, state);
 664                                 sys_move(win, x+margin, y+margin, col->width, sy);
 665                                 y += (isfocus ? sy : stack) + (margin/2);
 666                                 break;
 667                         case FULL:
 668                         case TAB:
 669                                 sys_move(win, x+margin, 0+margin,
 670                                         col->width, dpy->geom->h-2*margin);
 671                                 break;
 672                         }
 673                         sys_show(win, state);
 674                         if (focus == win)
 675                                 sys_raise(win);
 676                         ROW(lrow)->height = win->h;
 677                 }
 678                 x += col->width + margin;
 679         }
 680 }
 681
 682 /*******************************
 683  * Window management functions *
 684  *******************************/
 685 void wm_update(void)
 686 {
 687         /* Updates window sizes */
 688         for (list_t *ldpy = wm_tag->dpys; ldpy; ldpy = ldpy->next)
 689                 wm_update_cols(ldpy->data);
 690         tag_foreach_flt(wm_tag, ldpy, lflt, win) {
 691                 flt_t *flt = lflt->data;
 692                 sys_move(win, flt->x, flt->y, flt->w, flt->h);
 693                 sys_raise(flt->win);
 694                 sys_show(flt->win, flt->state);
 695         }
 696
 697         /* Hide other tags */
 698         for (list_t *tag = wm ->tags; tag; tag = tag->next)
 699                 if (tag->data != wm_tag) {
 700                         tag_foreach_col(TAG(tag), dpy, col, row, win)
 701                                         sys_show(win, ST_HIDE);
 702                         tag_foreach_flt(TAG(tag), dpy, flt, win)
 703                                         sys_show(win, ST_HIDE);
 704                 }
 705
 706         /* Set focused window */
 707         if (wm_focus)
 708                 set_focus(wm_focus);
 709 }
 710
 711 int wm_handle_event(win_t *win, event_t ev, mod_t mod, ptr_t ptr)
 712 {
 713         if (!win || win == wm_dpy->geom) return 0;
 714         //printf("wm_handle_event: %p - %x %c%c%c%c%c\n", win, ev,
 715         //      mod.up    ? '^' : 'v',
 716         //      mod.alt   ? 'a' : '-',
 717         //      mod.ctrl  ? 'c' : '-',
 718         //      mod.shift ? 's' : '-',
 719         //      mod.win   ? 'w' : '-');
 720
 721         /* Mouse events */
 722         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7) {
 723                 if (ev == EV_MOUSE1 && !mod.MODKEY && !mod.up)
 724                         return raise_float(win),         0;
 725                 if ((ev == EV_MOUSE3 && mod.MODKEY && !mod.up) ||
 726                     (ev == EV_MOUSE1 && mod.MODKEY && !mod.up && mod.shift))
 727                         return set_move(win,ptr,RESIZE), 1;
 728                 if (ev == EV_MOUSE1 && mod.MODKEY && !mod.up)
 729                         return set_move(win,ptr,MOVE),   1;
 730                 if (move_mode != NONE && mod.up)
 731                         return set_move(win,ptr,NONE),   1;
 732                 if (ev == EV_MOUSE1 && !mod.up && win->state == ST_SHADE)
 733                         return set_focus(win), wm_update(), 0;
 734                 return 0;
 735         }
 736
 737         /* Only handle key-down */
 738         if (mod.up)
 739                 return 0;
 740
 741         /* Misc */
 742         if (mod.MODKEY) {
 743 #ifdef DEBUG
 744                 if (ev == EV_F1) return raise_float(win), 1;
 745                 if (ev == EV_F2) return set_focus(win), 1;
 746                 if (ev == EV_F3) return sys_show(win, ST_SHOW),  1;
 747                 if (ev == EV_F4) return sys_show(win, ST_HIDE),  1;
 748                 if (ev == EV_F7) return sys_show(win, ST_SHADE), 1;
 749 #endif
 750                 if (ev == EV_F5) return wm_update(),    1;
 751                 if (ev == EV_F6) return print_txt(),    1;
 752                 if (ev == 'q')   return sys_exit(),     1;
 753                 if (ev == 'f')   return wm_handle_state(win, win->state,
 754                         win->state == ST_FULL ? ST_SHOW : ST_FULL);
 755         }
 756         if (mod.MODKEY && mod.shift) {
 757                 if (ev == 'c')   return sys_show(win, ST_CLOSE), 1;
 758         }
 759
 760         /* Floating layer */
 761         if (ev == ' ') {
 762                 if (mod.MODKEY && mod.shift)
 763                         return set_layer(win), 1;
 764                 if (mod.MODKEY)
 765                         return switch_layer(), 1;
 766         }
 767
 768         /* Movement commands */
 769         if (mod.MODKEY && mod.shift) {
 770                 switch (ev) {
 771                 case 'h': return shift_window(wm_focus,-1, 0), 1;
 772                 case 'j': return shift_window(wm_focus, 0,+1), 1;
 773                 case 'k': return shift_window(wm_focus, 0,-1), 1;
 774                 case 'l': return shift_window(wm_focus,+1, 0), 1;
 775                 default: break;
 776                 }
 777         }
 778         else if (mod.MODKEY) {
 779                 switch (ev) {
 780                 case 'h': return shift_focus(-1, 0), 1;
 781                 case 'j': return shift_focus( 0,+1), 1;
 782                 case 'k': return shift_focus( 0,-1), 1;
 783                 case 'l': return shift_focus(+1, 0), 1;
 784                 default: break;
 785                 }
 786         }
 787
 788         /* Column layout commands */
 789         if (mod.MODKEY) {
 790                 switch (ev) {
 791                 case 'd': return set_mode(win, SPLIT), 1;
 792                 case 's': return set_mode(win, STACK), 1;
 793                 case 'm': return set_mode(win, FULL),  1;
 794                 case 't': return set_mode(win, TAB),   1;
 795                 default: break;
 796                 }
 797         }
 798
 799         /* Tag switching */
 800         if (mod.MODKEY && '0' <= ev && ev <= '9') {
 801                 char name[] = {ev, '\0'};
 802                 if (mod.shift)
 803                         tag_set(win, name);
 804                 else
 805                         tag_switch(name);
 806                 wm_update();
 807         }
 808
 809         /* Focus change */
 810         if (ev == EV_ENTER && win->state != ST_SHADE)
 811                 return set_focus(win), 1;
 812
 813         /* Reset focus after after focus change,
 814          * not sure what is causing the focus change in the first place
 815          * but preventing that would be a better solution */
 816         if (ev == EV_FOCUS)
 817                 sys_focus(wm_focus ?: wm->root);
 818
 819         return 0;
 820 }
 821
 822 int wm_handle_ptr(win_t *cwin, ptr_t ptr)
 823 {
 824         //printf("wm_handle_ptr: %p - %d,%d %d,%d (%d) -- \n",
 825         //              cwin, ptr.x, ptr.y, ptr.rx, ptr.ry, move_mode);
 826
 827         if (move_mode == NONE)
 828                 return 0;
 829
 830         int dx = ptr.rx - move_prev.rx;
 831         int dy = ptr.ry - move_prev.ry;
 832         move_prev = ptr;
 833
 834         if (move_layer == TILING && move_mode == RESIZE) {
 835                 list_t *vert = move_dir.v < 0 ? move_lrow->prev : move_lrow->next;
 836                 list_t *horz = move_dir.h < 0 ? move_lcol->prev : move_lcol->next;
 837                 if (vert) {
 838                         ROW(move_lrow)->height += move_dir.v * dy;
 839                         ROW(vert)->height      -= move_dir.v * dy;
 840                 }
 841                 if (horz) {
 842                         COL(move_lcol)->width  += move_dir.h * dx;
 843                         COL(horz)->width       -= move_dir.h * dx;
 844                 }
 845                 wm_update();
 846         }
 847
 848         if (move_layer == FLOATING) {
 849                 flt_t *flt = move_lflt->data;
 850                 win_t *win = flt->win;
 851                 if (move_mode == MOVE)
 852                         sys_move(win, win->x+dx, win->y+dy, win->w, win->h);
 853                 else if (move_mode == RESIZE)
 854                         sys_move(win,
 855                                 win->x + dx * (move_dir.h < 0),
 856                                 win->y + dy * (move_dir.v < 0),
 857                                 win->w + dx *  move_dir.h,
 858                                 win->h + dy *  move_dir.v);
 859                 flt->x = win->x; flt->y = win->y;
 860                 flt->w = win->w; flt->h = win->h;
 861         }
 862
 863         return 0;
 864 }
 865
 866 int wm_handle_state(win_t *win, state_t prev, state_t next)
 867 {
 868         row_t *row = NULL;
 869         flt_t *flt = NULL;
 870
 871         search(wm_tag, win, NULL, NULL, &row, &flt);
 872
 873         if (row) row->state = next;
 874         if (flt) flt->state = next;
 875
 876         if (prev == ST_MAX || prev == ST_FULL ||
 877             next == ST_MAX || next == ST_FULL)
 878                 wm_update();
 879
 880         return 1;
 881 }
 882
 883 void wm_insert(win_t *win)
 884 {
 885         printf("wm_insert: %p\n", win);
 886         print_txt();
 887
 888         /* Initialize window */
 889         win->wm = new0(win_wm_t);
 890         sys_watch(win, EV_ENTER, MOD());
 891         sys_watch(win, EV_FOCUS, MOD());
 892
 893         /* Add to screen */
 894         if (win->type == TYPE_DIALOG || win->parent)
 895                 wm_dpy->layer = FLOATING;
 896         put_win(win, wm_tag, wm_dpy->layer);
 897
 898         /* Arrange */
 899         wm_update();
 900         set_focus(win);
 901         print_txt();
 902 }
 903
 904 void wm_remove(win_t *win)
 905 {
 906         printf("wm_remove: %p\n", win);
 907         print_txt();
 908         for (list_t *tag = wm->tags; tag; tag = tag->next)
 909                 cut_win(win, tag->data);
 910         free(win->wm);
 911         set_focus(wm_focus);
 912         wm_update();
 913         print_txt();
 914 }
 915
 916 void wm_init(win_t *root)
 917 {
 918         printf("wm_init: %p\n", root);
 919
 920         /* Load configuration */
 921         margin = conf_get_int("main.margin", margin);
 922         stack  = conf_get_int("main.stack",  stack);
 923
 924         wm          = new0(wm_t);
 925         wm->root    = root;
 926         wm->screens = list_sort(sys_info(root), 0, sort_win);
 927         wm->tag     = tag_new(wm->screens, "1");
 928         wm->tags    = list_insert(NULL, wm->tag);
 929
 930         event_t ev_e[] = {EV_ENTER, EV_FOCUS};
 931         event_t ev_s[] = {'h', 'j', 'k', 'l', 'c', 'q', ' ',
 932                 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 933                 EV_MOUSE1, EV_MOUSE3};
 934         event_t ev_m[] = {'h', 'j', 'k', 'l', 'd', 's', 'm', 't', 'f', ' ',
 935                 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 936                 EV_F1, EV_F2, EV_F3, EV_F4,  EV_F5,  EV_F6,
 937                 EV_F7, EV_F8, EV_F9, EV_F10, EV_F11, EV_F12,
 938                 EV_MOUSE1, EV_MOUSE3};
 939         for (int i = 0; i < countof(ev_e); i++)
 940                 sys_watch(root, ev_e[i],  MOD());
 941         for (int i = 0; i < countof(ev_m); i++)
 942                 sys_watch(root, ev_m[i], MOD(.MODKEY=1));
 943         for (int i = 0; i < countof(ev_s); i++)
 944                 sys_watch(root, ev_s[i], MOD(.MODKEY=1,.shift=1));
 945 }
 946
 947 void wm_free(win_t *root)
 948 {
 949         /* Re-show and free all windows */
 950         while ( wm->tags) { tag_t *tag =  wm->tags->data;
 951         while (tag->dpys) { dpy_t *dpy = tag->dpys->data;
 952         while (dpy->cols) { col_t *col = dpy->cols->data;
 953         while (col->rows) { row_t *row = col->rows->data;
 954                 sys_show(row->win, ST_SHOW);
 955                 free(row->win->wm);
 956         col->rows = list_remove(col->rows, col->rows, 1); }
 957         dpy->cols = list_remove(dpy->cols, dpy->cols, 1); }
 958         while (dpy->flts) { flt_t *flt = dpy->flts->data;
 959                 sys_show(flt->win, ST_SHOW);
 960                 free(flt->win->wm);
 961         dpy->flts = list_remove(dpy->flts, dpy->flts, 1); }
 962         tag->dpys = list_remove(tag->dpys, tag->dpys, 1); }
 963          wm->tags = list_remove( wm->tags,  wm->tags, 1); }
 964
 965         /* Free remaining data */
 966         free(wm);
 967 }